Daikin D-Series Service Manual
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Daikin D-Series Service Manual

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Table of Contents

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Si18 - 525B
D-Series
[Applied Models]
Super Multi Plus : Cooling only
Super Multi Plus : Heat Pump

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Summary of Contents for Daikin D-Series

  • Page 1 Si18 - 525B D-Series [Applied Models] Super Multi Plus : Cooling only Super Multi Plus : Heat Pump...
  • Page 2 Si18-525B SUPER MULTI PLUS D-Series Cooling Only Indoor Unit <R-410A> FTKS25DVM FTKS20DVMA FDKS25CVMB FFQ25B7V1B FTKS35DVM FTKS25DVMA FDKS35CVMB FFQ35B7V1B FTKS50BVMB FTKS35DVMA CDKS50CVMB FFQ50B7V1B FTKS60BVMB FTKS50BVMA8 CDKS60CVMB FFQ60B7V1B FTKS71BVMB FTKS60BVMA8 CDKS25CVMA FCQ35BVE FTK50AZVMB FTKS71BVMA8 CDKS35CVMA FCQ50BVE FTK60AZVMB CDKS50CVMA FCQ60BVE FTK71AZVMB CDKS60CVMA FCQ71BVE...
  • Page 3 Si18-525B Heat Pump Indoor Unit <R-410A> FTXS20DVMA CDXS25CVMA FLXS25BVMA FFQ25B7V1B FTXS25DVMA CDXS35CVMA FLXS35BVMA FFQ35B7V1B FTXS35DVMA CDXS50CVMA FLXS50BVMA FFQ50B7V1B FTXS50BVMA8 CDXS60CVMA FLXS60BVMA FFQ60B7V1B FTXS60BVMA8 CDXS25DVMT FVXS35BVMA FCQ35BVE FTXS71BVMA8 CDXS35DVMT FVXS50BVMA FCQ50BVE FTXS20DVMT CDXS50DVMT FCQ60BVE FTXS25DVMT CDXS60DVMT FCQ71BVE FTXS35DVMT FBQ60BV1 FTXS50DVMT FBQ71BV1 FTXS60DVMT FBQ60BVL FTXS71DVMT...

  • Page 4: Table Of Contents

    Si18-525B 1. Introduction ..................viii 1.1 Safety Cautions ..................viii 1.2 Used Icons ..................... xii Part 1 List of Functions ..............1 1. List of Functions ..................2 1.1 Cooling Only.....................2 1.2 Heat Pump .....................13 Part 2 Specifications ..............21 1. Specifications ..................22 1.1 Cooling Only...................22 1.2 Heat Pump .....................42 Part 3 Printed Circuit Board Connector Wiring Diagram ...
  • Page 5 Si18-525B 3. Special Control..................114 3.1 Startup Control ..................114 3.2 Oil Return Operation ................115 3.3 Defrosting Operation ................117 3.4 Pump-down Residual Operation ............118 3.5 Restart Standby..................118 3.6 Stopping Operation ................119 3.7 Pressure Equalization Prior to Startup ..........119 4. Protection Control ................120 4.1 High Pressure Protection Control............120 4.2 Low Pressure Protection Control............122 4.3 Discharge Pipe Protection Control ............123...
  • Page 6 Si18-525B 4. Field Setting for SkyAir Indoor Unit .............182 4.1 Explanation...................182 4.2 Field Setting ..................183 4.3 Initial Setting Contents .................184 4.4 Local Setting Mode Number..............185 4.5 Detailed Explanation of Setting Modes ..........186 4.6 Centralized Group No. Setting .............190 4.7 Maintenance Mode Setting..............191 5.
  • Page 7 Si18-525B 5.6 Swing Flap Motor Malfunction / Lock ...........347 5.7 Malfunction of Capacity Setting............349 5.8 Malfunction of Heat Exchanger Thermistor (R2T)........350 5.9 Malfunction of Heat Exchanger Thermistor (R3T)........351 5.10 Malfunction of Suction Air Thermistor ..........352 5.11 Malfunction of Remote Controller Thermistor........353 5.12 Transmission Error (between Indoor Unit and Remote Controller) ..354 5.13 Transmission Error (between Main and Sub Remote Controller)..355 5.14 Malfunction of Field Setting Switch ............356...
  • Page 8 Si18-525B Part 9 Removal Procedure ............401 1. Outdoor Unit..................402 1.1 Removal of Outer Panels ..............402 1.2 Removal of PCB...................409 1.3 Removal of Solenoid Valve, Four Way Valve and Motorized Valve..420 1.4 Removal of Thermistor Assembly ............421 1.5 Removal of Fan Motor................422 2.

  • Page 9: Introduction

    Introduction Si18-525B 1. Introduction Safety Cautions Cautions and Be sure to read the following safety cautions before conducting repair work. The caution items are classified into “ Warning” and “ Caution”. The “ Warning” Warnings items are especially important since they can lead to death or serious injury if they are not followed closely.
  • Page 10 Si18-525B Introduction Warning Be sure to wear a safety helmet, gloves, and a safety belt when working at a high place (more than 2m). Insufficient safety measures may cause a fall accident. In case of R410A refrigerant models, be sure to use pipes, flare nuts and tools for the exclusive use of the R410A refrigerant.
  • Page 11 Introduction Si18-525B 1.1.2 Cautions Regarding Safety of Users Warning Be sure to use parts listed in the service parts list of the applicable model and appropriate tools to conduct repair work. Never attempt to modify the equipment. The use of inappropriate parts or tools may cause an electrical shock, excessive heat generation or fire.
  • Page 12 Si18-525B Introduction Warning Check to make sure that the power cable plug is not dirty or loose, then insert the plug into a power outlet securely. If the plug has dust or loose connection, it may cause an electrical shock or fire. Be sure to install the product correctly by using the provided standard For unitary type installation frame.

  • Page 13: Used Icons

    Introduction Si18-525B Caution Be sure to measure the insulation resistance after the repair, and make sure that the resistance is 1 MΩ or higher. Faulty insulation may cause an electrical shock. Be sure to check the drainage of the indoor unit after the repair. Faulty drainage may cause the water to enter the room and wet the furniture and floor.

  • Page 14: Part 1 List Of Functions

    Si18-525B Part 1 List of Functions 1. List of Functions ..................2 1.1 Cooling Only.....................2 1.2 Heat Pump .....................13 List of Functions...

  • Page 15: List Of Functions

    List of Functions Si18-525B 1. List of Functions Cooling Only 1.1.1 R-410A Models Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter — Function Clean –5 Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter —...
  • Page 16 Si18-525B List of Functions Category Functions Category Functions Basic Function Inverter (with Inverter Power Control) Health & Clean Air Purifying Filter — –5 Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
  • Page 17 List of Functions Si18-525B Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter — — Function Clean Operation Limit for Cooling (°CDB) — — Operation Limit for Heating (°CWB) — — Photocatalytic Deodorizing Filter —...
  • Page 18 Si18-525B List of Functions Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter Function Clean Operation Limit for Cooling (°CDB) — Operation Limit for Heating (°CWB) — Photocatalytic Deodorizing Filter PAM Control — Air Purifying Filter with Photocatalytic —...
  • Page 19 List of Functions Si18-525B Category Functions Category Functions Basic Function Inverter (with Inverter Power Control) Health & Clean Air Purifying Filter — — Operation Limit for Cooling (°CDB) — — Photocatalytic Deodorizing Filter — — Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
  • Page 20 Si18-525B List of Functions Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter — — Function Clean Operation Limit for Cooling (°CDB) — — Operation Limit for Heating (°CWB) — — Photocatalytic Deodorizing Filter —...
  • Page 21 List of Functions Si18-525B Category Functions Category Functions Basic Function Inverter (with Inverter Power Control) Health & Clean Air Purifying Filter — — Operation Limit for Cooling (°CDB) — — Photocatalytic Deodorizing Filter — — Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
  • Page 22 Si18-525B List of Functions Category Functions Category Functions Basic Function Inverter (with Inverter Power Control) Health & Clean Air Purifying Filter — — — Operation Limit for Cooling (°CDB) — — — Photocatalytic Deodorizing Filter — — — Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
  • Page 23 List of Functions Si18-525B 1.1.2 R-22 Models Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter — Function Clean Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
  • Page 24 Si18-525B List of Functions Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter — Function Clean Operation Limit for Cooling (°CDB) — — Photocatalytic Deodorizing Filter — Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
  • Page 25 List of Functions Si18-525B Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter — — Function Clean Operation Limit for Cooling (°CDB) — — — Operation Limit for Heating (°CWB) — — — Photocatalytic Deodorizing Filter —...

  • Page 26: Heat Pump

    Si18-525B List of Functions Heat Pump 1.2.1 R-410A Models Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter — Function Clean –5 Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — –15 Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
  • Page 27 List of Functions Si18-525B Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter — Function Clean –5 Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — –15 Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
  • Page 28 Si18-525B List of Functions Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter — Function Clean –5 Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — –15 Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
  • Page 29 List of Functions Si18-525B Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter — — — Function Clean Operation Limit for Cooling (°CDB) — — — Photocatalytic Deodorizing Filter — — — Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
  • Page 30 Si18-525B List of Functions Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter — — — Function Clean Operation Limit for Cooling (°CDB) — — — Photocatalytic Deodorizing Filter — — — Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
  • Page 31 List of Functions Si18-525B Category Functions Category Functions Basic Inverter (with Inverter Power Health & Air Purifying Filter — Function Control) Clean Operation Limit for Cooling (°CDB) — — — Photocatalytic Deodorizing Filter — Air Purifying Filter with Operation Limit for Heating (°CWB) —...
  • Page 32 Si18-525B List of Functions Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter — — — Function Clean Operation Limit for Cooling (°CDB) — — — Photocatalytic Deodorizing Filter — — — Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
  • Page 33 List of Functions Si18-525B List of Functions...

  • Page 34: Part 2 Specifications

    Si18-525B Part 2 Specifications 1. Specifications ..................22 1.1 Cooling Only...................22 1.2 Heat Pump .....................42 Specifications...

  • Page 35: Specifications

    Specifications Si18-525B Specifications Cooling Only 1.1.1 Outdoor Units 50Hz 220-230V / 60Hz 220-230V Model RMKS112DVM RMKS140DVM RMKS160DVM Cooling Capacity 11.2 (9,630) 14.0 (12,040) 15.5 (13,330) (kcal/h) Total Indoor Unit Capacity 5.5~14.5 7.0~18.2 8.0~20.8 Power Consumption — Running Current — Casing Color Ivory White Type Hermetically Sealed Scroll Type...
  • Page 36 Si18-525B Specifications 50Hz 220-230-240V Model RMKS112DV1A RMKS140DV1A RMKS160DV1A Cooling Capacity 11.2 (9,630) 14.0 (12,040) 15.5 (13,330) (kcal/h) Total Indoor Unit Capacity 5.5~14.5 7.0~18.2 8.0~20.8 Power Consumption — Running Current — Casing Color Ivory White Type Hermetically Sealed Scroll Type Model JT100FCVD Compressor Motor Output...
  • Page 37 Specifications Si18-525B 50Hz 220-230V / 60Hz 220-230V Model RMKD112DVM RMKD140DVM RMKD160DVM Cooling Capacity 11.2 (9,630) 14.0 (12,040) 15.5 (13,330) (kcal/h) Total Indoor Unit Capacity 5.5~14.5 7.0~18.2 8.0~20.8 Power Consumption — Running Current — Casing Color Ivory White Type Hermetically Sealed Scroll Type Model JT100FBVD Compressor...
  • Page 38 Si18-525B Specifications 1.1.2 BP Unit 50Hz 220-240V / 60Hz 220-230V Model BPMKS967A2 BPMKS967A3 Connectable Indoor Units 1~2 Units 1~3 Units Casing Color Paintingless Power Consumption Running Current 0.05 0.05 Refrigerant Type R-410A Dimension (H×W×D) 180×294(650)*×350 Package Dimension (H×W×D) 257×738×427 Machine Weight Gross Weight Number of Wiring Connections 4 for Interunit Wiring...
  • Page 39 Specifications Si18-525B 50Hz 230V Model BPMKS967A2B BPMKS967A3B Connectable Indoor Units 1~2 Units 1~3 Units Casing Color Paintingless Power Consumption Running Current 0.05 0.05 Refrigerant Type R-410A Dimension (H×W×D) 180×294(650)*×350 Package Dimension (H×W×D) 257×738×427 Machine Weight Gross Weight Number of Wiring Connections 4 for Interunit Wiring φ...
  • Page 40 Si18-525B Specifications 50Hz 220-230V / 60Hz 220-230V Model BPMKD967A2 BPMKD967A3 Connectable Indoor Units 1~2 Units 1~3 Units Casing Color Paintingless Power Consumption Running Current 0.05 0.05 Refrigerant Type Dimension (H×W×D) 180×294(650)*×350 Package Dimension (H×W×D) 257×738×427 Machine Weight Gross Weight 3 for Power Supply (Including Earth Wiring), 2 for Interunit Wiring (Outdoor Unit-BP, BP-BP) Number of Wiring Connections 4 for Interunit Wiring (BP-Indoor Unit) φ...
  • Page 41 Specifications Si18-525B 1.1.3 Indoor Units Wall Mounted Type 50Hz 220-230V / 60Hz 220-230V Model FTKS25DVM FTKS35DVM Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color White White 8.7 (307) 8.9 (314) 6.7 (237) 6.9 (242) m³/min Air Flow Rates (cfm) 4.7 (166) 4.8 (169) 3.9 (138)
  • Page 42 Si18-525B Specifications 50Hz 230V Model FTKS71BVMB FTK50AZVMB Rated Capacity 7.1kW Class 5.0kW Class Front Panel Color White Almond White 16.7 (590) 12.3 (434) 14.2 (501) 10.7 (378) m³/min Air Flow Rates (cfm) 11.6 (409) 9.1 (321) 10.6 (374) 8.0 (282) Type Cross Flow Fan Cross Flow Fan...
  • Page 43 Specifications Si18-525B 50Hz 220-230-240V Model FTKS20DVMA FTKS25DVMA Rated Capacity 2.0kW Class 2.5kW Class Front Panel Color White White 8.7 (307) 8.7 (307) 6.7 (237) 6.7 (237) m³/min Air Flow Rates (cfm) 4.7 (166) 4.7 (166) 3.9 (138) 3.9 (138) Type Cross Flow Fan Cross Flow Fan Motor Output...
  • Page 44 Si18-525B Specifications 50Hz 240V Model FTKS50BVMA8 FTKS60BVMA8 Rated Capacity 5.0kW Class 6.0kW Class Front Panel Color White White 11.4 (402) 16.2 (573) 9.8 (346) 13.9 (490) m³/min Air Flow Rates (cfm) 8.7 (306) 11.9 (420) 7.7 (271) 10.7 (378) Type Cross Flow Fan Cross Flow Fan Motor Output...
  • Page 45 Specifications Si18-525B 50Hz 220-230V / 60Hz 220-230V Model FTKD25DVM FTKD35DVM Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color White White 8.9 (314) 9.0 (318) 7.3 (256) 7.4 (259) m³/min Air Flow Rates (cfm) 5.6 (198) 5.7 (201) 4.8 (169) 4.9 (173) Type Cross Flow Fan...
  • Page 46 Si18-525B Specifications 50Hz 220-230-240V / 60Hz 220-230V Model FTKD71FVM Rated Capacity 7.1kW Class Front Panel Color White 18.3 (646) 15.3 (540) m³/min Air Flow Rates (cfm) 12.7 (448) 11.3 (399) Type Cross Flow Fan Motor Output Speed Steps 5 Steps, Quiet, Auto Air Direction Control Right, Left, Horizontal, Downward Air Filter...
  • Page 47 Specifications Si18-525B 50Hz 230V Model FTK50AVM Rated Capacity 5.0kW class Front Panel Color Almond White 12.9 (455) 11.4 (402) m³/min Air Flow Rates (cfm) 9.9 (349) 8.3 (293) Type Cross Flow Fan Motor Output Speed Steps 5 Steps, Quiet, Auto Air Direction Control Right, Left, Horizontal, Downward Air Filter...
  • Page 48 Si18-525B Specifications Duct Connected Type 50Hz 230V Model FDKS25CVMB FDKS35CVMB Rated Capacity 2.5kW Class 3.5kW Class — — Front Panel Color 9.5 (335) 10.0 (353) 8.8 (311) 9.3 (328) m³/min Air Flow Rates (cfm) 8.0 (282) 8.5 (300) 6.7 (237) 7.0 (247) Type Sirocco Fan...
  • Page 49 Specifications Si18-525B 50Hz 230V Model CDKS25CVMA CDKS35CVMA Rated Capacity 2.5kW Class 3.5kW Class — — Front Panel Color 9.5 (335) 10.0 (353) 8.8 (311) 9.3 (328) m³/min Air Flow Rates (cfm) 8.0 (282) 8.5 (300) 6.7 (237) 7.0 (247) Type Sirocco Fan Sirocco Fan Motor Output...
  • Page 50 Si18-525B Specifications 50Hz 220-230V / 60Hz 220-230V Model CDKD25CVM CDKD35CVM Rated Capacity 2.5kW Class 3.5kW Class — — Front Panel Color 9.5 (335) 10.0 (353) 8.8 (311) 9.3 (328) m³/min Air Flow Rates (cfm) 8.0 (282) 8.5 (300) 6.7 (237) 7.0 (247) Type Sirocco Fan...
  • Page 51 Specifications Si18-525B 50Hz 220-230-240V / 60Hz 220-230V Model CDKD25EAVM CDKD35EAVM Rated Capacity 2.5kW Class 3.5kW Class — — Front Panel Color 8.7 (307) 8.7 (307) 8.0 (282) 8.0 (282) m³/min Air Flow Rates (cfm) 7.3 (258) 7.3 (258) 6.2 (219) 6.2 (219) Type Sirocco Fan...
  • Page 52 Si18-525B Specifications Ceiling Mounted Cassette Type 50Hz 230V Model FFQ25B7V1B FFQ35B7V1B Rated Capacity 2.5kW Class 3.5kW Class Color White White Decoration Panel Dimensions (H×W×D) 55×700×700 55×700×700 9.0 (318) 10.0 (353) — — m³/min Air Flow Rates (cfm) 6.5 (230) 6.5 (230) —...
  • Page 53 Specifications Si18-525B 50Hz 220-230V / 60Hz 220V Model FCQ35BVE FCQ50BVE Rated Capacity 3.5kW Class 5.0kW Class Color White White Decoration Panel Dimensions (H×W×D) 40×950×950 40×950×950 14.0 (494) 15.0 (530) — — m³/min Air Flow Rates (cfm) 10.0 (353) 11.0 (388.3) —...
  • Page 54 Si18-525B Specifications Ceiling Mounted Built-in Type 50Hz 220-230-240V Model FBQ60BV1 FBQ71BV1 Rated Capacity 6.0kW Class 7.1kW Class Color White White Decoration Panel Dimensions (H×W×D) 55×1,100×500 55×1,100×500 17.0 (600) 19.0 (670) — — m³/min Air Flow Rates (cfm) 13.0 (459) 14.0 (494) —...

  • Page 55: Heat Pump

    Specifications Si18-525B Heat Pump 1.2.1 Outdoor Units 50Hz 220-230V / 60Hz 220-230V Model RMXS112DVM RMXS140DVM RMXS160DVM Cooling Capacity 11.2 (9,630) 14.0 (12,040) 15.5 (13,330) (kcal/h) Heating Capacity 12.5 (10,750) 16.0 (13,760) 17.5 (15,050) (kcal/h) Total Indoor Unit Capacity 5.5~14.5 7.0~18.2 8.0~20.8 Power Consumption —...
  • Page 56 Si18-525B Specifications 50Hz 220-230-240V Model RMXS112DV1A RMXS140DV1A RMXS160DV1A Cooling Capacity 11.2 (9,630) 14.0 (12,040) 15.5 (13,330) (kcal/h) Heating Capacity 12.5 (10,750) 16.0 (13,760) 17.5 (15,050) (kcal/h) Total Indoor Unit Capacity 5.5~14.5 7.0~18.2 8.0~20.8 Power Consumption — Running Current — Casing Color Ivory White Type Hermetically Sealed Scroll Type...
  • Page 57 Specifications Si18-525B 60Hz 220V Model RMXS112DVLT RMXS140DVLT RMXS160DVLT Cooling Capacity 11.2 (9,630) 14.0 (12,040) 15.5 (13,330) (kcal/h) Heating Capacity 12.5 (10,750) 16.0 (13,760) 17.5 (15,050) (kcal/h) Total Indoor Unit Capacity 5.5~14.5 7.0~18.2 8.0~20.8 Power Consumption — Running Current — Casing Color Ivory White Type Hermetically Sealed Scroll Type...
  • Page 58 Si18-525B Specifications 1.2.2 BP Units 50Hz 220-240V / 60Hz 220-230V Model BPMKS967A2 BPMKS967A3 Connectable Indoor Units 1~2 Units 1~3 Units Casing Color Paintingless Power Consumption Running Current 0.05 0.05 Refrigerant Type R-410A Dimension (H×W×D) 180×294(650)*×350 Package Dimension (H×W×D) 257×738×427 Machine Weight Gross Weight Number of Wiring Connections 4 for Interunit Wiring...
  • Page 59 Specifications Si18-525B 1.2.3 Indoor Units Wall Mounted Type 50Hz 220-230-240V FTXS20DVMA FTXS25DVMA Model Cooling Heating Cooling Heating Rated Capacity 2.0kW Class 2.5kW Class Front Panel Color White White 8.7 (307) 9.4 (332) 8.7 (307) 9.4 (332) 6.7 (237) 7.6 (268) 6.7 (237) 7.6 (268) m³/min...
  • Page 60 Si18-525B Specifications 50Hz 240V FTXS50BVMA8 FTXS60BVMA8 Model Cooling Heating Cooling Heating Rated Capacity 5.0kW Class 6.0kW Class Front Panel Color White White 11.4 (402) 12.6 (444) 16.2 (573) 17.4 (613) 9.8 (346) 10.9 (385) 13.9 (490) 15.3 (539) m³/min Air Flow Rates (cfm) 8.7 (306) 9.3 (329)
  • Page 61 Specifications Si18-525B 60Hz 220V FTXS20DVMT FTXS25DVMT Model Cooling Heating Cooling Heating Capacity 2.0kW Class 2.5kW Class Front Panel Color White White 8.7 (307) 9.4 (332) 8.7 (307) 9.4 (332) 6.7 (237) 7.6 (268) 6.7 (237) 7.6 (268) m³/min Air Flow Rates (cfm) 4.7 (166) 5.8 (205)
  • Page 62 Si18-525B Specifications 60Hz 220V FTXS60DVMT FTXS71DVMT Model Cooling Heating Cooling Heating Capacity 6.0kW Class 7.1kW Class Front Panel Color White White 16.2 (572) 17.4 (614) 16.7 (590) 18.5 (653) 13.6 (480) 15.1 (533) 14.2 (501) 15.1 (533) m³/min Air Flow Rates (cfm) 11.4 (402) 12.7 (448)
  • Page 63 Specifications Si18-525B Duct Connected Type 50Hz 230V CDXS25CVMA CDXS35CVMA Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class — — Front Panel Color 9.5 (335) 9.5 (335) 10.0 (353) 10.0 (353) 8.8 (311) 8.8 (311) 9.3 (328) 9.3 (328) m³/min Air Flow Rates (cfm)
  • Page 64 Si18-525B Specifications 60Hz 220V CDXS25DVMT CDXS35DVMT Model Cooling Heating Cooling Heating Capacity 2.5kW Class 3.5kW Class — — Front Panel Color 9.5 (335) 10.0 (353) 8.8 (311) 9.3 (328) m³/min Air Flow Rates (cfm) 8.0 (282) 8.5 (300) 6.7 (237) 7.0 (247) Type Sirocco Fan...
  • Page 65 Specifications Si18-525B Floor / Ceiling Suspended Dual Type 50Hz 230V FLXS25BVMA FLXS35BVMA Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color Almond White Almond White 7.6 (268) 9.2 (325) 8.6 (304) 9.8 (346) 6.8 (240) 8.3 (293) 7.6 (268) 8.9 (314)
  • Page 66 Si18-525B Specifications Floor Standing Type 50Hz 230V FVXS35BVMA FVXS50BVMA Model Cooling Heating Cooling Heating Rated Capacity 3.5kW Class 5.0kW Class Front Panel Color Almond White Almond White 8.3 (293) 9.2 (325) 10.8 (381) 13.2 (466) 6.3 (222) 7.1 (251) 9.2 (325) 11.3 (399) m³/min Air Flow Rates...
  • Page 67 Specifications Si18-525B Ceiling Mounted Cassette Type 50Hz 230V FFQ25B7V1B FFQ35B7V1B Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class Color White White Decoration Panel Dimensions (H×W×D) 55×700×700 55×700×700 9.0 (318) 9.0 (318) 10.0 (353) 10.0 (353) — — —...
  • Page 68 Si18-525B Specifications 50Hz 220-230V / 60Hz 220V FCQ35BVE FCQ50BVE Model Cooling Heating Cooling Heating Rated Capacity 3.5kW Class 5.0kW Class Color White White Decoration Panel Dimensions (H×W×D) 40×950×950 40×950×950 14.0 (494) 15.0 (530) — — m³/min Air Flow Rates (cfm) 10.0 (353) 11.0 (388.3) —...
  • Page 69 Specifications Si18-525B Ceiling Mounted Built-in Type 50Hz 220-230V FBQ60BV1 FBQ71BV1 Model Cooling Heating Cooling Heating Rated Capacity 6.0kW Class 7.1kW Class Color White White Decoration Panel Dimensions (H×W×D) 55×1100×500 55×1100×500 17.0 (600) 19.0 (670) — — m³/min Air Flow Rates (cfm) 13.0 (459) 14.0 (494)
  • Page 70 Si18-525B Specifications Ceiling Suspended Type FHQ35BUV1B9 FHQ50BUV1B9 FHQ60BUV1B9 Model Cooling Heating Cooling Heating Cooling Heating Rated Capacity 3.5kW Class 5.0kW Class 6.0kW Class Color White White White Decoration Panel Dimensions (H×W×D) — — — 13.0 (458) 13.0 (458) 13.0 (458) 13.0 (458) 17.0 (600) 16.0 (565)
  • Page 71 Specifications Si18-525B Specifications...

  • Page 72: Part 3 Printed Circuit Board Connector Wiring Diagram

    Si18-525B Part 3 Printed Circuit Board Connector Wiring Diagram 1. Printed Circuit Board Connector Wiring Diagram........60 1.1 Outdoor Unit ...................60 1.2 Branch Provider Unit ................66 1.3 Wall Mounted Type ................67 1.4 Duct Connected Type................76 1.5 Floor / Ceiling Suspended Dual Type.............78 1.6 Floor Standing Type ................81 1.7 Ceiling Mounted Cassette Type (600×600)..........84 1.8 Ceiling Mounted Cassette Type (950×950)..........87...

  • Page 73: Printed Circuit Board Connector Wiring Diagram

    Printed Circuit Board Connector Wiring Diagram Si18-525B 1. Printed Circuit Board Connector Wiring Diagram Outdoor Unit 1.1.1 Control PCB (A1P) Connectors Connector to Filter PCB (A3P) Connector for SVP (Hot Gas Bypass Valve) Connector for SVG (Receiver Gas Discharging Valve) Connector for 4 Way Valve Connector for Crankcase Heater X25A...
  • Page 74 Si18-525B Printed Circuit Board Connector Wiring Diagram PCB Detail X34A X37A X44A X45A X46A X25A X28A X26A to H7P to BS5 2P119093 Printed Circuit Board Connector Wiring Diagram...
  • Page 75 Printed Circuit Board Connector Wiring Diagram Si18-525B 1.1.2 Inverter PCB (A2P) Connectors X60A Connector for High Pressure Switch X205A Connector for Control PCB (A1P) X206A Connector for Fan Motor (Upper Side) X207A Connector for Fan Motor (Lower Side) 5) LC, Terminal for Filter PCB (A3P) RMX(K)S models X206A...
  • Page 76 Si18-525B Printed Circuit Board Connector Wiring Diagram RMKD models X206A X207A X60A X205A 2P120962 Printed Circuit Board Connector Wiring Diagram...
  • Page 77 Printed Circuit Board Connector Wiring Diagram Si18-525B 1.1.3 Filter PCB (A3P) Connectors Connector for Control PCB (A1P) 2) LA, Terminal for X1M (Power Supply Terminal Strip) 3) LB, Terminal for Inverter PCB (A2P) Note: Other Designation Fuse (250V 6.3A) Earth Terminal RMX(K)S models 2P135804 Printed Circuit Board Connector Wiring Diagram...
  • Page 78 Si18-525B Printed Circuit Board Connector Wiring Diagram RMKD models 2P120963 Printed Circuit Board Connector Wiring Diagram...

  • Page 79: Branch Provider Unit

    Printed Circuit Board Connector Wiring Diagram Si18-525B Branch Provider Unit Connectors X20A Connector for Bypass Electronic Expansion Valve X21A to X23A Connector for Electronic Expansion Valve to Room A, B and C X90A Connector for Thermistors Note: Other Designations Fuse (AC250V 3.15A) Terminal for Inter Connecting Wire to Room A Terminal for Inter Connecting Wire to Room B Terminal for Inter Connecting Wire to Room C...

  • Page 80: Wall Mounted Type

    Si18-525B Printed Circuit Board Connector Wiring Diagram Wall Mounted Type 1.3.1 FTK(X)S 20~35 D Connectors PCB(1) (Control PCB) Connector for DC fan motor Connector for swing motor (horizontal blades) Connector for centralized control (HA) Connector for display PCB Connector for signal receiver PCB Connector for heat exchanger thermistor Connector for INTELLIGENT EYE sensor PCB PCB(2)
  • Page 81 Printed Circuit Board Connector Wiring Diagram Si18-525B PCB Detail PCB(1): Control PCB LED A (R4288) PCB(2): Signal Receiver PCB PCB(3): Display PCB LED1 LED2 LED3 RTH1 (R4289) (R4290) PCB(4): INTELLIGENT EYE sensor PCB (R4291) Printed Circuit Board Connector Wiring Diagram...
  • Page 82 Si18-525B Printed Circuit Board Connector Wiring Diagram 1.3.2 FTKD 25/35 D Connectors PCB(1) (Control PCB) Connector for AC fan motor Connector for swing motor (horizontal blades) Connector for AC fan motor (Hall IC) Connector for centralized control (HA) Connector for display PCB Connector for signal receiver PCB Connector for heat exchanger thermistor Connector for INTELLIGENT EYE sensor PCB...
  • Page 83 Printed Circuit Board Connector Wiring Diagram Si18-525B PCB Detail PCB(1): Control PCB LED A (R4779) PCB(2): Signal Receiver PCB PCB(3): Display PCB LED1 LED2 LED3 RTH1 (R4289) (R4290) PCB(4): INTELLIGENT EYE sensor PCB (R4547) Printed Circuit Board Connector Wiring Diagram...
  • Page 84 Si18-525B Printed Circuit Board Connector Wiring Diagram 1.3.3 FTK(X)S 50~71 B, FTXS 50~71 D, FTKD 50~71 F Connectors PCB(1) (Control PCB) Connector for DC fan motor Connector for swing motor (horizontal blades) Connector for swing motor (vertical blades) Connector for centralized control (HA) Connector for buzzer PCB...
  • Page 85 Printed Circuit Board Connector Wiring Diagram Si18-525B PCB Detail PCB(1): Control PCB (indoor unit) LED A (R2860) PCB(2): Signal Receiver PCB PCB(3): Buzzer PCB (R2861) RTH1 (R2862) PCB(4): Display PCB PCB(5): Intelligent Eye sensor PCB LED1 LED2 LED3 (R2863) (R2864) Printed Circuit Board Connector Wiring Diagram...
  • Page 86 Si18-525B Printed Circuit Board Connector Wiring Diagram 1.3.4 FTK 50-71 A Connectors PCB(1) (Control PCB) Connector for swing motor (horizontal swing) Connector for swing motor (vertical swing) Connector for centralized control Connector for display PCB Connector for signal receiver PCB Connector for heat exchanger thermistor Connector for power supply PCB PCB(2)
  • Page 87 Printed Circuit Board Connector Wiring Diagram Si18-525B PCB Detail PCB(1): Control PCB PCB Detail PCB(2): Power Supply PCB Printed Circuit Board Connector Wiring Diagram...
  • Page 88 Si18-525B Printed Circuit Board Connector Wiring Diagram PCB Detail PCB(3):Display PCB PCB Detail PCB (4): Signal Receiver PCB EX511 REV 12 PHOTO 2P084377- 1 S31(RTH) (R4977) Printed Circuit Board Connector Wiring Diagram...

  • Page 89: Duct Connected Type

    Printed Circuit Board Connector Wiring Diagram Si18-525B Duct Connected Type Connectors PCB(1) (Control PCB) Connector for AC fan motor Connector for AC fan motor Connector for centralized control to 5 rooms Connector for display PCB Connector for heat exchanger thermistor PCB(2) (Display PCB)
  • Page 90 Si18-525B Printed Circuit Board Connector Wiring Diagram PCB Detail PCB (2): Display PCB 2P084375 Printed Circuit Board Connector Wiring Diagram...

  • Page 91: Floor / Ceiling Suspended Dual Type

    Printed Circuit Board Connector Wiring Diagram Si18-525B Floor / Ceiling Suspended Dual Type Connectors PCB(1) (Control PCB) Connector for swing motor (horizontal swing) Connector for AC fan motor Connector for centralized control Connector for display PCB Connector for signal receiver PCB Connector for heat exchanger thermistor Connector for power supply PCB PCB(2)
  • Page 92 Si18-525B Printed Circuit Board Connector Wiring Diagram PCB Detail PCB (1): Control PCB PCB Detail PCB (2): Power Supply PCB Printed Circuit Board Connector Wiring Diagram...
  • Page 93 Printed Circuit Board Connector Wiring Diagram Si18-525B PCB (3): Display PCB PCB (4): Signal Receiver PCB EX511 REV 12 PHOTO 2P084377- 1 S31(RTH) (R4977) Printed Circuit Board Connector Wiring Diagram...

  • Page 94: Floor Standing Type

    Si18-525B Printed Circuit Board Connector Wiring Diagram Floor Standing Type Connectors PCB(1) (Power Supply PCB) 1) S8, S202, Connector for control PCB S204 PCB(2) (Control PCB) Connector for swing motor and lower air outlet motor Connector for centralized control Connector for display PCB S31, S32 Connector for room temperature / heat exchanger thermistor S7, S201,...
  • Page 95 Printed Circuit Board Connector Wiring Diagram Si18-525B PCB Detail PCB (1): Power Supply PCB Printed Circuit Board Connector Wiring Diagram...
  • Page 96 Si18-525B Printed Circuit Board Connector Wiring Diagram PCB Detail PCB (2): Control PCB PCB (3): Signal Receiver PCB PCB (4): Display PCB Printed Circuit Board Connector Wiring Diagram...

  • Page 97: Ceiling Mounted Cassette Type (600×600)

    Printed Circuit Board Connector Wiring Diagram Si18-525B Ceiling Mounted Cassette Type (600×600) Connectors PCB(1)(Control PCB [A1P]) Connector for terminal strip (for wired remote controller) 2) X10A, X11A Connector for transformer X15A Connector for float switch 4) X17A, X18A Connector for heat exchanger thermistor X19A Connector for room temperature thermistor X20A...
  • Page 98 Si18-525B Printed Circuit Board Connector Wiring Diagram PCB Detail PCB(1): Control PCB (A1P) X20A X25A X27A X11A X10A X33A X18A Capacity setting adaptor X19A X61A X60A X36A X40A (Service monitor LED) X17A X15A 2P095006 X24A X35A Printed Circuit Board Connector Wiring Diagram...
  • Page 99 Printed Circuit Board Connector Wiring Diagram Si18-525B PCB Detail PCB(2): Signal Receiver PCB (A3P) (R4873) PCB(3): Display PCB (A4P) LED4 LED3 LED2 LED1 (R4874) Printed Circuit Board Connector Wiring Diagram...

  • Page 100: Ceiling Mounted Cassette Type (950×950)

    Si18-525B Printed Circuit Board Connector Wiring Diagram Ceiling Mounted Cassette Type (950×950) Connectors PCB(1)(Control PCB [A1P]) Connector for terminal strip (for wired remote controller) 2) X10A, X11A Connector for transformer X15A Connector for float switch 4) X17A, X18A Connector for heat exchanger thermistor X19A Connector for room temperature thermistor X20A...
  • Page 101 Printed Circuit Board Connector Wiring Diagram Si18-525B PCB Detail PCB(1): Control PCB (A1P) X20A X25A X27A X11A X10A X33A X18A Capacity setting adaptor X19A X61A X60A X36A (Service monitor LED) X17A X15A 2P095006 X24A X35A Printed Circuit Board Connector Wiring Diagram...
  • Page 102 Si18-525B Printed Circuit Board Connector Wiring Diagram PCB Detail PCB(2): Signal Receiver PCB (A2P) (R4873) PCB(3): Display PCB (A3P) LED2 LED1 LED3 LED4 (R4955) Printed Circuit Board Connector Wiring Diagram...

  • Page 103: Ceiling Mounted Built-In Type

    Printed Circuit Board Connector Wiring Diagram Si18-525B Ceiling Mounted Built-in Type Connectors Control PCB [A1P] Connector for terminal strip (for wired remote controller) 2) X10A, X11A Connector for transformer X15A Connector for float switch 4) X17A, X18A Connector for heat exchanger thermistor X19A Connector for room temperature thermistor X21A...
  • Page 104 Si18-525B Printed Circuit Board Connector Wiring Diagram PCB Detail Control PCB (A1P) X21A X27A X25A X11A X10A X35A X33A X60A X61A 2P095008 X15A X18A X19A X17A Printed Circuit Board Connector Wiring Diagram...

  • Page 105: Ceiling Suspended Type

    Printed Circuit Board Connector Wiring Diagram Si18-525B 1.10 Ceiling Suspended Type Connectors Connector for Terminal Strip (for Wired Remote Controller) X14A Connector for Limit Switch (for Swing Flap) X15A Connector for Drain Pump (Optional Accessory) X17A Connector for Heat Exchanger Thermistor (2) X18A Connector for Heat Exchanger Thermistor (1) X19A...
  • Page 106 Si18-525B Printed Circuit Board Connector Wiring Diagram PCB Detail Capacity setting adaptor X19A X18A X40A X15A X14A X17A X61A X35A X60A X33A (Service monitor LED) X24A X26A X27A X29A X20A X25A 2P095007 Printed Circuit Board Connector Wiring Diagram...
  • Page 107 Printed Circuit Board Connector Wiring Diagram Si18-525B Printed Circuit Board Connector Wiring Diagram...

  • Page 108: Part 4 Refrigerant Circuit

    Si18-525B Part 4 Refrigerant Circuit 1. Refrigerant Circuit .................96 1.1 Outdoor Units ..................96 1.2 BP Units ....................98 2. Functional Parts Layout ................99 2.1 Outdoor Units ..................99 3. Refrigerant Flow for Each Operation Mode.........100 3.1 Cooling Operation ................100 3.2 Heating Operation ................101 3.3 Cooling Oil Return Operation ...............102 3.4 Heating Oil Return Operation &...

  • Page 109: Refrigerant Circuit

    Refrigerant Circuit Si18-525B Refrigerant Circuit Outdoor Units No. in refrigerant Symbol Name Major Function system diagram Inverter compressor is operated on frequencies between 52 Hz and 190 Hz by using Inverter compressor (INV) the inverter. 25 steps Since the system is of air heat exchanging type, the fan is operated at 8-step rotation Inverter fan speed by using the inverter.
  • Page 110 Si18-525B Refrigerant Circuit Refrigerant Circuit Diagram (Q0371) Refrigerant Circuit...

  • Page 111: Bp Units

    Refrigerant Circuit Si18-525B BP Units No. in refrigerant Symbol Name Major Function system diagram Electronic expansion valve Among EVA, EVB and EVC, the electronic expansion valve of operating room is called (for operating room) EVU. Electronic expansion valve Among EVA, EVB and EVC, the electronic expansion valve of stopping room is called (for stopping room) EVT.

  • Page 112: Functional Parts Layout

    Si18-525B Functional Parts Layout 2. Functional Parts Layout Outdoor Units Birds-eye view Solenoid valve (Connector color : PINK) S1NPH High pressure sensor S1NPH (Connector color : RED) High pressure sensor lead wire (Connector color : RED) (Low voltage) Four way valve coil S1NPL Low pressure sensor Y1E Electronic expansion valve...

  • Page 113: Refrigerant Flow For Each Operation Mode

    Refrigerant Flow for Each Operation Mode Si18-525B 3. Refrigerant Flow for Each Operation Mode Cooling Operation Refrigerant Circuit...

  • Page 114: Heating Operation

    Si18-525B Refrigerant Flow for Each Operation Mode Heating Operation Refrigerant Circuit...

  • Page 115: Cooling Oil Return Operation

    Refrigerant Flow for Each Operation Mode Si18-525B Cooling Oil Return Operation Refrigerant Circuit...

  • Page 116: Heating Oil Return Operation & Defrost Operation

    Si18-525B Refrigerant Flow for Each Operation Mode Heating Oil Return Operation & Defrost Operation Refrigerant Circuit...
  • Page 117 Refrigerant Flow for Each Operation Mode Si18-525B Refrigerant Circuit...

  • Page 118: Part 5 Function

    Si18-525B Part 5 Function 1. Operation Mode ..................107 2. Basic Control..................108 2.1 Normal Operation .................108 2.2 Compressor PI Control.................109 2.3 Electronic Expansion Valve PI Control..........112 2.4 Cooling Operation Fan Control.............113 3. Special Control..................114 3.1 Startup Control ..................114 3.2 Oil Return Operation ................115 3.3 Defrosting Operation ................117 3.4 Pump-down Residual Operation ............118 3.5 Restart Standby..................118...
  • Page 119 Si18-525B 8. Indoor Unit (SkyAir Models) ..............146 8.1 Function Outline ...................146 8.2 Electric Function Parts .................147 8.3 Function Details..................148 Function...

  • Page 120: Operation Mode

    Si18-525B Operation Mode Operation Mode Operation in stop mode Indoor unit stop or Indoor unit thermostat ON thermostat OFF Malfunction/Standby Restart standby Pressure (Compressor stop) equalization prior to startup Malfunction/ Standby Indoor unit stop or thermostat OFF Startup control • Cooling startup Pump-down Indoor unit thermostat ON control...

  • Page 121: Basic Control

    Basic Control Si18-525B Basic Control Normal Operation Cooling Operation Actuator Operation Remarks Used for high pressure protection control, low pressure protection control, discharge pipe temperature protection control, compressor Compressor Compressor PI control operating frequency upper limit control with inverter protection control, dew prevention control, and freeze-up protection control.

  • Page 122: Compressor Pi Control

    Si18-525B Basic Control Compressor PI Control Compressor PI Control Carries out the compressor capacity PI control to maintain Te at constant during cooling operation and Tc at constant during heating operation to ensure stable unit performance. [Cooling operation] Controls compressor capacity to adjust Te to Te : Low pressure equivalent saturation achieve target value (TeS).
  • Page 123 Basic Control Si18-525B ∆D Control Receiving the capacity request signal from the indoor unit, the outdoor unit corrects its target pressure for capacity control. Controls ∆ D signal from indoor unit as follows. UP control: When the UP command come from more than one indoor unit among thermostat-ON indoor units.
  • Page 124 Si18-525B Basic Control Heating Operation TcS = TcS initial value + KTc2 KTc2 : Correction value by ∆ D signal in heating. KTc2 = 0 (without correction) During compressor frequency PI Not during compressor frequency PI control (KTc2 = 0) control ∆...

  • Page 125: Electronic Expansion Valve Pi Control

    Basic Control Si18-525B Electronic Expansion Valve PI Control Main Electronic Expansion Valve EV1 Control Carries out the electronic expansion valve (Y1E) PI control to maintain the evaporator outlet superheated degree (SH) at constant during heating operation to make maximum use of the outdoor unit heat exchanger (evaporator).

  • Page 126: Cooling Operation Fan Control

    Si18-525B Basic Control Cooling Operation Fan Control In cooling operation with low outdoor air temperature, this control is used to provide the adequate amount of circulation air with liquid pressure secured by high pressure control using outdoor unit fan. Outline In cooling operation fan control, outdoor unit fans are controlled by PI control to come the cooling Tc to 34°C.

  • Page 127: Special Control

    Special Control Si18-525B Special Control Startup Control On activation, following control is performed to lighten load of the compressor by back liquid and the like. Also, the position of the four way valve is defined. 3.1.1 Startup Control in Cooling Operation Actuator Operation Remarks...

  • Page 128: Oil Return Operation

    Si18-525B Special Control Oil Return Operation Oil flown from the compressor to the side of system is collected by oil-returning operation, in case of that oil in the compressor runs down. 3.2.1 Oil Return Operation in Cooling Operation [Conditions to start] The cooling oil-returning operation is started referring following conditions.
  • Page 129 Special Control Si18-525B 3.2.2 Oil Return Operation in Heating Operation [Conditions to start] The heating oil-returning operation is started referring following conditions. Integrated amount of displaced oil Timer (After the power is turned on, integrated operating-time is 2 hours and subsequently every 8 hours.) In addition, integrated amount of displaced oil is derived from Tc, Te, and the compressor load.

  • Page 130: Defrosting Operation

    Si18-525B Special Control Defrosting Operation The defrost operation is performed to solve frost on the outdoor unit heat exchanger when heating, and the heating capacity is recovered. [Conditions to start] The defrost operation is started referring following conditions. Outdoor heat exchanger heat transfer co-efficiency Temperature of heat-exchange (Tb) Low pressure equivalent saturation temperature (Te) Timer (2 hours at the minimum)

  • Page 131: Pump-Down Residual Operation

    Special Control Si18-525B Pump-down Residual Operation When activating compressor, if the liquid refrigerant remains in the heat-exchanger, the liquid enters into the compressor and dilutes oil therein resulting in decrease of lubricity. Therefore, the pump-down residual operation is performed to collect the refrigerant in the heat- exchanger when the compressor is down.

  • Page 132: Stopping Operation

    Si18-525B Special Control Stopping Operation 3.6.1 When System is in Stop Mode Actuator Operation Compressor Outdoor unit fan Four way valve Keep former condition. Main electronic expansion valve (EV1) 0 pls Subcooling electronic expansion valve (EV2) 0 pls Hot gas bypass valve (SVP) Receiver gas discharging valve (SVG) Ending conditions Indoor unit thermostat is turned ON.

  • Page 133: Protection Control

    Protection Control Si18-525B Protection Control High Pressure Protection Control This high pressure protection control is used to prevent the activation of protection devices due to abnormal increase of high pressure and to protect compressors against the transient increase of high pressure. In cooling operation Pc >...
  • Page 134 Si18-525B Protection Control In heating operation High pressure not limited • INV upper limit frequency & • Pc≤2.95MPa • During heating normal operation • During oil return operation • Not during oil return operation • After oil return operation • Not after oil return operation &...

  • Page 135: Low Pressure Protection Control

    Protection Control Si18-525B Low Pressure Protection Control This low pressure protection control is used to protect compressors against the transient decrease of low pressure. In cooling operation Low pressure not limited Pe: LP pressure sensor detection value < > 0.25MPa 0.4MPa Low pressure SVP=OFF...

  • Page 136: Discharge Pipe Protection Control

    Si18-525B Protection Control Discharge Pipe Protection Control This discharge pipe protection control is used to protect the compressor internal temperature against a malfunction or transient increase of discharge pipe temperature. INV compressor HTdi :Value of INV compressor discharge pipe temperature (Tdi) compensated with outdoor air temperature Tp : Value of compressor port temperature calculated by Tc and Te, and suction...

  • Page 137: Inverter Protection Control

    Protection Control Si18-525B Inverter Protection Control Inverter current protection control and inverter fin temperature control are performed to prevent tripping due to a malfunction, or transient inverter overcurrent, and fin temperature increase. Inverter overcurrent protection control Not limited •Inverter current ≤ 23.8A &...

  • Page 138: Freeze-Up Protection Control

    Si18-525B Protection Control Freeze-up Protection Control Outline According to the freeze prevention status sent from the BP unit. The compressor output frequency is regulated to decrease the compressor capacity in order to prevent the indoor heat exchanger from freezing. Detail Zones are produced based on the freeze prevention status signal sent from the BP unit (Indoor unit), and the freeze prevention control prevents freezing of the indoor unit.

  • Page 139: Dew Condensation Prevention Control

    Protection Control Si18-525B Dew Condensation Prevention Control Outline According to the dew condensation prevention status sent from the BP unit. The compressor output frequency is regulated to decrease the compressor capacity in order to prevent the indoor unit from dew condensation. Detail Zones are produced based on the dew condensation prevention status signal sent from the BP unit (Indoor unit), and the dew condensation prevention control prevents dew condensation of...

  • Page 140: Other Control

    Si18-525B Other Control 5. Other Control Demand Operation In order to save the power consumption, the capacity of outdoor unit is saved with control forcibly by using “Demand 1 Setting” or “Demand 2 Setting”. To operate the unit with this mode, additional setting of “Continuous Demand Setting” or external input by external control adaptor is required.

  • Page 141: Bp Unit Control

    BP Unit Control Si18-525B BP Unit Control BP Unit Command Conversion 1. ∆ D (room temperature − temperature setting) signals from BP units are converted to capacity up / down signal. ∆ D signals from BP units are used as the capacity up / down signal in frequency commands (excludes when Powerful function is in operation).

  • Page 142: Bp Unit Electronic Expansion Valve Control

    Si18-525B BP Unit Control BP Unit Electronic Expansion Valve Control Purpose of the This function provides instructions regarding the absolute flow rate, relative flow rate and fully closing from the outdoor unit to the BP unit in order to ensure outdoor unit compressor safety Function and optimum refrigerating cycle of the system.
  • Page 143 BP Unit Control Si18-525B 6.2.3 Full Closing of Electronic Expansion Valves Purpose of the The electronic expansion valves are initialized when the power is turned on. Function Details The following processes are conducted. 1. Conducts P1 pulses close when power is turned on, and sets current opening to 0 pulse (fully closing process).

  • Page 144: Sh Control In Cooling Operation

    Si18-525B BP Unit Control SH Control in Cooling Operation Purpose of the This function ensures appropriate refrigerant distribution when many room units are operating in the cooling mode. Function Outline The heat exchanger temperatures and gas pipe temperatures of operating room units are detected by the gas pipe thermistors, and the electronic expansion valves' flow rates are corrected so as to adjust the difference between heat exchanger temperature and gas pipe temperature of each room unit (hereafter referred to as SH) close to the target values.

  • Page 145: Sc Control In Heating Operation

    BP Unit Control Si18-525B Note: 1. In Sky Air models, the indoor units are equipped with distribution capillary tubes ; therefore, the heat exchangers may superheat even when the condition is met. 2. In Sky Air models, the heat exchanger intermediate position is provided on the liquid connection pipe side;...

  • Page 146: Indoor Unit (Ra Models)

    Si18-525B Indoor Unit (RA Models) Indoor Unit (RA Models) Power-Airflow Dual Flaps, Wide Angle Louvers and Auto-Swing Power-airflow The large flaps send a large volume of air downwards to the floor. The flap provides an optimum control area in cooling, heating and dry mode. Dual Flaps Heating Mode During heating mode, the large flap enables direct warm air straight downwards.

  • Page 147: Fan Speed Control For Indoor Units

    Indoor Unit (RA Models) Si18-525B Fan Speed Control for Indoor Units Control Mode The airflow rate can be automatically controlled depending on the difference between the set temperature and the room temperature. This is done through phase control and Hall IC control.

  • Page 148: Programme Dry Function

    Si18-525B Indoor Unit (RA Models) Programme Dry Function Programme dry function removes humidity while preventing the room temperature from lowering. Since the microcomputer controls both the temperature and air flow volume, the temperature adjustment and fan adjustment buttons are inoperable in this mode. In Case of The microcomputer automatically sets the temperature and fan settings.

  • Page 149: Automatic Operation

    Indoor Unit (RA Models) Si18-525B Automatic Operation Automatic Cooling / Heating Function (Heat Pump Only) When the AUTO mode is selected with the remote controller, the microcomputer automatically determines the operation mode from cooling and heating according to the room temperature and setting temperature at the time of the operation startup, and automatically operates in that mode.

  • Page 150: Thermostat Control

    Si18-525B Indoor Unit (RA Models) Thermostat Control Thermostat control is based on the difference between the room temperature and the setpoint. Thermostat OFF Condition The temperature difference is in the zone A. Thermostat ON Condition The temperature difference is above the zone C after being in the zone A. The system resumes from defrost control in any zones except A.

  • Page 151: Night Set Mode

    Indoor Unit (RA Models) Si18-525B Night Set Mode When the OFF timer is set, the Night Set circuit automatically activates. The Night Set circuit maintains the airflow setting made by users. The Night Set The Night Set circuit continues heating or cooling the room at the set temperature for the first Circuit one hour, then automatically raises the temperature setting slightly in the case of cooling, or lowers it slightly in the case of heating, for economical operations.

  • Page 152: Econo Mode

    Si18-525B Indoor Unit (RA Models) ECONO Mode Outline FTK(X)S20-35D, FTKD25-35D The "ECONO mode" reduces the maximum operating current and power consumption by approx. 30% during start up etc.. This mode is particularly convenient for energy-saving-oriented users. It is also a major bonus for those whose breaker capacities do not allow the use of multiple electrical devices and air conditioners.

  • Page 153: Intelligent Eye

    Indoor Unit (RA Models) Si18-525B INTELLIGENT EYE This is the function that detects existence of humans in the room by a human motion sensor (INTELLIGENT EYE) and reduces the capacity when there is no human in the room in order to save electricity.
  • Page 154 Si18-525B Indoor Unit (RA Models) Since the set temperature is shifted by 2°C higher for 40 minutes, compressor speed becomes low and can realize energy saving operation. But as thermostat is prone to be off by the fact that the set temperature has been shifted, the thermostat-off action is prohibited in 40 minutes so as to prevent this phenomena.

  • Page 155: Home Leave Operation

    Indoor Unit (RA Models) Si18-525B 7.10 HOME LEAVE Operation Outline In order to respond to the customer's need for immediate heating and cooling of the room after returning home or for house care, a measure to switch the temperature and air volume from that for normal time over to outing time by one touch is provided.

  • Page 156: Inverter Powerful Operation

    Si18-525B Indoor Unit (RA Models) 7.11 Inverter POWERFUL Operation Outline In order to exploit the cooling and heating capacity to full extent, operate the air conditioner by increasing the indoor fan rotating speed and the compressor frequency. Details of the When POWERFUL button is pushed in each operation mode, the fan speed / setting temperature will be converted to the following states in a period of twenty minutes.

  • Page 157: 7.12 Other Functions

    Indoor Unit (RA Models) Si18-525B 7.12 Other Functions 7.12.1 Hot Start Function Heat Pump Only In order to prevent the cold air blast that normally comes when heating is started, the temperature of the heat exchanger of the indoor unit is detected, and either the air flow is stopped or is made very weak thereby carrying out comfortable heating of the room.
  • Page 158 Si18-525B Indoor Unit (RA Models) 7.12.7 Air Purifying Filter with Photocatalytic Deodorizing Function For FTK(X)S50-71B, FTXS50-71D This filter incorporates the benefits the Air Purifying Filter and Photocatalytic Deodorizing Filter in a single unit. Combining the two filters in this way increases the active surface area of the new filter.

  • Page 159: Indoor Unit (Skyair Models)

    Indoor Unit (SkyAir Models) Si18-525B 8. Indoor Unit (SkyAir Models) Function Outline FFQ-B, FCQ-B FBQ-B, FHQ-B (Input) (Output) Indoor Unit Thermostat Control Two thermostats used, suction Suction Sensor(R1T) and remote controller. Fan Motor Monitoring Function Drain Pump Heat Exchanger Sensor Cool/Heat Automatic Optional for FHQ (R2T)

  • Page 160: Electric Function Parts

    Si18-525B Indoor Unit (SkyAir Models) Electric Function Parts FFQ – B Capacity Remarks Wired remote controller BRC1C61 Optional Accessory Wireless remote Heat pump BRC7E530W Optional controller Accessory Cooling only BRC7E531W Electronic control unit [2P095006-2] EC0226 Fan motor [3P104408-1] 4P 55W Fan motor capacitor 4.0µF AC440V Float switch...

  • Page 161: Function Details

    Indoor Unit (SkyAir Models) Si18-525B Function Details Thermostat Control Freeze-up The thermostat turns OFF under the following temperature conditions to prevent freezing of the indoor unit heat exchanger. Protection The motorized valve is controlled to maintain the indoor unit heat exchanger temperature Control (Te) above 0°C.
  • Page 162 Si18-525B Indoor Unit (SkyAir Models) Condensation Avoidance Continuous 30 minutes operation of cooling One hour drying Control (FHQ Only) After continuous 30 minutes of operation with downward The unit operation can be reset with changing operation horizontal blade position, change the blade position to mode into "heating"...
  • Page 163 Indoor Unit (SkyAir Models) Si18-525B 1-2 Operations when an occurrence of water level abnormality 1-2-a) Behavior between occurrence and recovery of water level abnormality After compressor stops due to water level abnormality, drain pump is operated intermittently, i.e. 5 min ON, 5 sec OFF and 5 min ON.
  • Page 164 Si18-525B Indoor Unit (SkyAir Models) 2. Heating 2-1 Basic operation In heating operation of the unit equipped with a humidifier, when "Interlocking of drain pump / humidifier" (15(25)-3) is set to "yes" (02), the drain pump operates 20-min OFF and 3-min ON repeatedly during compressor is in operation.
  • Page 165 Indoor Unit (SkyAir Models) Si18-525B 2-2-a)-2 When a water level abnormality occurs during drain pump OFF The abnormality is determined when 80 seconds elapse from compressor stop. Other than above, behavior is same as 2-2-a). Occurrence of drain water level abnormality Intermittent operation (*1) 5min 5min...
  • Page 166 Si18-525B Indoor Unit (SkyAir Models) Using Conditions Remote controller thermostat is equipped only in wired remote controller. Even when “use remote controller thermostat” is selected in service mode, the remote controller Remote thermostat may not be used. Controller < Conditions not to use > Thermostat 1.
  • Page 167 Indoor Unit (SkyAir Models) Si18-525B Program Dry The points of thermostat ON or OFF are determined according to the suction air temperature at the startup of unit operation. Operation The set temperature and flow rate are not displayed on remote controller. Function Operation startup Thermostat...
  • Page 168 Si18-525B Indoor Unit (SkyAir Models) Fan and Flap Operations Flap Remote Controller FFQ, FCQ, Indication Heating Hot Start from Defrost In Swing Horizontal Swing Operation Operation In Airflow Horizontal Set Position Direction Setting Defrost In Swing Horizontal Swing Operation In Airflow Horizontal Set Position Direction Setting...
  • Page 169 Indoor Unit (SkyAir Models) Si18-525B Mode Conflict [Overview] While the indoor unit for another room and the outdoor unit are operating, when the indoor unit for the own room is activated, the operation mode which can be selected in the own room has some restrictions as mentioned below.
  • Page 170 Si18-525B Indoor Unit (SkyAir Models) Non-operating [Overview] After operating an indoor unit for the own room in the cooling mode or dry mode, stop the unit Room using the remote controller. Under the condition, when an unit for another room is started Prevention Fan operation in the heating mode, the fan in the own room may rotate in the LL mode even though Control...
  • Page 171 Indoor Unit (SkyAir Models) Si18-525B Function...

  • Page 172: Part 6 Test Operation

    Si18-525B Part 6 Test Operation 1. Test Operation ..................160 1.1 Procedure and Outline .................160 2. Outdoor Unit PCB Layout..............165 3. Field Setting ..................166 3.1 Field Setting from Outdoor Unit............166 3.2 Detail of Setting Mode ................172 4. Field Setting for SkyAir Indoor Unit .............182 4.1 Explanation...................182 4.2 Field Setting ..................183 4.3 Initial Setting Contents .................184...

  • Page 173: Test Operation

    Test Operation Si18-525B Test Operation Procedure and Outline Follow the following procedure to conduct the initial test operation after installation. 1.1.1 Check work prior to turn power supply on Is the power supply single-phase 220-230V / 50Hz? Check the below items. Have you finished a ductwork to drain? 2Power wiring Have you detach transport fitting?
  • Page 174 Si18-525B Test Operation 1.1.3 Judging and reprogramming in case of redundant BP addresses The BP unit of this system is provided with specific addresses in its production stage. These addresses are used to conduct various controls. If by any chance (on 3 out of 260000 units) these addresses are redundant, the system may get in trouble.
  • Page 175 Test Operation Si18-525B Example of DIP switch (DS2) settings on the BP unit's PCB DS2-1 DS2-2 DS2-3 DS2-4 BP unit 1 BP unit 2 BP unit 3 DS1~4 : Factory setting is OFF. The BP unit 1 through 3 show the first through third unit, respectively. The order of these units is flexible.
  • Page 176 Si18-525B Test Operation 1.1.7 Check Operation * During check operation, mount front panel to avoid the misjudging. * Check operation is mandatory for normal unit operation. (When the check operation is not executed, alarm code "U3" will be displayed.) Press and hold the TEST ...
  • Page 177 Test Operation Si18-525B 1.1.8 Confirmation on Normal Operation • Conduct normal unit operation after the check operation has been completed. (When outdoor air temperature is 30°CDB or higher, the unit can not be operated with heating mode. See the installation manual attached.) •...

  • Page 178: Outdoor Unit Pcb Layout

    Si18-525B Outdoor Unit PCB Layout Outdoor Unit PCB Layout Outdoor Unit PCB (2) Set mode display (LED) (3) Mode setting switch H1P H2P H3P H4P H5P H6P H7P MODE RETURN TEST RESET (1) Microcomputer normal monitor 1 2 3 4 1 2 3 4 (4)Local setting switch Connection terminal for transmission use...

  • Page 179: Field Setting

    Field Setting Si18-525B 3. Field Setting Field Setting from Outdoor Unit 3.1.1 Setting by dip switches The following field settings are made by dip switches on PCB. Dipswitch Setting item Description Setting Cool / Heat Used to set cool / heat change over setting by DS1-1 change over remote controller equipped with outdoor unit.
  • Page 180 Si18-525B Field Setting Setting by pushbutton switches The following settings are made by pushbutton switches on PCB. LED indication (Factory setting) MODE RETURN TEST RESET (V2760) There are the following three setting modes. Setting mode 1 (H1P off) Initial status (when normal) : Also indicates during “abnormal”. Setting mode 2 (H1P on) Used to modify the operating status and to set program addresses, etc.
  • Page 181 Field Setting Si18-525B a. “Setting mode 1” “Normally, “Setting mode 1” is set. In case of other status, push MODE button (BS1) one time and set to “Setting mode 1”. Display for malfunction/preparing/test-run LED display example ∗ The current state is displayed. Setting (displaying) item Normal Malfunction...
  • Page 182 Si18-525B Field Setting b. “Setting mode 2” Setting item Description Indoor unit forced Allows forced operation of indoor unit fan while unit is fan H stopped. (H tap) Push and hold the MODE button (BS1) for 5 seconds and set to Indoor unit forced Allows forced operation of indoor unit.
  • Page 183 Field Setting Si18-525B Setting item display C/H selection Setting condition display MODE TEST Demand Setting item noise Master Slave ∗ Factory set 8777778 ∗ Normal operation Indoor forced fan H 8777787 Indoor forced fan H 8777778 ∗ Normal operation Indoor forced operation 8777787 Indoor forced operation...
  • Page 184 Si18-525B Field Setting c. Monitor mode LED display Setting item Data display To enter the monitor mode, push the 9 7 7 7 7 7 7 Various settings See below MODE button (BS1) when in 9 7 7 7 8 7 8 “Setting mode 1”.

  • Page 185: Detail Of Setting Mode

    Field Setting Si18-525B Detail of Setting Mode 3.2.1 Cool / Heat Mode Switching There are the following 2 cool/heat switching modes. Set cool/heat separately for each outdoor unit system by indoor unit remote controller. Set cool/heat separately for each outdoor unit system by cool/heat switching remote controller.
  • Page 186 Si18-525B Field Setting Set Cool / Heat Separately for Each Outdoor Unit System by Cool/Heat Switching Remote Controller Set outdoor unit PCB DS1-1 to “outdoor” (factory set). Set cool/heat switching to “individual” for “Setting mode 1” (factory set). Test Operation...
  • Page 187 Field Setting Si18-525B 3.2.2 Setting of Low Noise Operation Demand Operation Setting of Low Noise Operation By connecting the external contact input to the low noise input of the outdoor unit external control adaptor (optional), you can lower operating noise by 2-3 dB. A.
  • Page 188 Si18-525B Field Setting Image of operation in the case of A Image of operation in the case of B Image of operation in the case of A and B Test Operation...
  • Page 189 Field Setting Si18-525B Setting of Demand Operation By connecting the external contact input to the demand input of the outdoor unit external control adaptor (optional), the power consumption of unit operation can be saved suppressing the compressor operating condition. A. When the demand operation is carried out by external instructions (with the use of the outdoor unit external control adaptor).
  • Page 190 Si18-525B Field Setting Image of operation in the case of A Power consumption The power Rated power consumption consumption during 80 % of rated power consumption Demand level 1 instructing Demand level 2 instructing Demand level 3 instructing the demand level 1 70 % of rated power consumption instructing can be 60 % of rated power consumption...
  • Page 191 Field Setting Si18-525B Detailed Setting Procedure of Low Noise Operation and Demand Control 1. Setting mode 1 (H1P off) In setting mode 2, push the BS1 (MODE button) one time. → Setting mode 2 is entered and H1P lights. During the setting mode 1 is displayed, “In low noise operation” and “In demand control” are displayed.
  • Page 192 Si18-525B Field Setting Settin Setting Setting No. indication Setting No. indication Setting Setting contents indication (Initial setting) g No. contents contents H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P Night quiet mode (Factory...
  • Page 193 Field Setting Si18-525B 3.2.3 Setting of Refrigerant Recovery Mode When carrying out the refrigerant collection on site, fully open the respective expansion valve of BP and outdoor unit. Both the outdoor unit and the indoor unit are forbidden to operation. Operation In setting mode 2 with units in stop mode, set “B Refrigerant Recovery / Vacuuming mode”...
  • Page 194 Si18-525B Field Setting 3.2.5 Check Operation To prevent any trouble in the period of installation at site, the system is provided with a test operation mode enabling check for incorrect wiring, stop valve left in closed, and judgment of piping length. CHECK OPERATION FUNCTION LED display (H1P~H7P) ( BLINKING...

  • Page 195: Field Setting For Skyair Indoor Unit

    Field Setting for SkyAir Indoor Unit Si18-525B 4. Field Setting for SkyAir Indoor Unit Explanation Field set is carried out from the remote controller. At time of installation, or after maintenance inspection/repair, carry out field set according to the explanation below. Incorrect settings will cause a malfunction to occur.

  • Page 196: Field Setting

    Si18-525B Field Setting for SkyAir Indoor Unit Field Setting 4.2.1 Wired Remote Controller Note: (Field setting must be made from the remote controller in accordance with the installation conditions.) Setting can be made by changing the “Mode number”, “FIRST CODE NO.”, and “SECOND CODE NO.”.

  • Page 197: Initial Setting Contents

    Field Setting for SkyAir Indoor Unit Si18-525B 4.2.2 Wireless Remote Controller Note: If optional accessories are mounted on the indoor unit, the indoor unit setting may have to be changed. Refer to the instruction manual (optional hand book) for each optional accessory. Procedure 1.

  • Page 198: Local Setting Mode Number

    Si18-525B Field Setting for SkyAir Indoor Unit Local Setting Mode Number Example To set the filter sign time to “filter contamination - heavy” for all units in a group: Set mode No. to “10,” setting switch No. to “0,” and setting position No. to “02.” Table Mode Setting...

  • Page 199: Detailed Explanation Of Setting Modes

    Field Setting for SkyAir Indoor Unit Si18-525B Detailed Explanation of Setting Modes 4.5.1 Air Flow Direction Setting (FFQ, FCQ) Set the air flow direction of indoor units as given in the table below. (Set when optional air outlet blocking pad has been installed.) The second code No. is factory set to “01.” Setting Table Mode No.
  • Page 200 Si18-525B Field Setting for SkyAir Indoor Unit 4.5.5 Fan Speed Changeover When Thermostat is OFF By setting to “Set Fan Speed,” you can switch the fan speed to the set fan speed when the heating thermostat is OFF. ∗ Since there is concern about draft if using “fan speed up when thermostat is OFF,” you should take the setup location into consideration.
  • Page 201 Field Setting for SkyAir Indoor Unit Si18-525B Address Setting <Setting from the remote controller> 1. Hold down the “ ” button and the “ ” button for at least 4 seconds, to get (It is Factory Set the FIELD SET MODE. (Indicated in the display area in the figure at below). to “1”) 2.
  • Page 202 Si18-525B Field Setting for SkyAir Indoor Unit After Setting Stick the Unit No. label at decoration panel air discharge outlet as well as on the back of the wireless remote controller. Wireless remote controller Unit No. label Decoration panel PRECAUTIONS Set the Unit No.

  • Page 203: Centralized Group No. Setting

    Field Setting for SkyAir Indoor Unit Si18-525B Centralized Group No. Setting If carrying out centralized control with a central remote controller and unified ON/OFF controller, you have to set the group No. for each group by remote controller. To set the group No., first turn on the power supply of the central remote controller, unified ON/OFF controller and indoor unit.

  • Page 204: Maintenance Mode Setting

    Si18-525B Field Setting for SkyAir Indoor Unit Maintenance Mode Setting Procedure 1. Enter the field set mode. Continue to push the inspection / test operation button for a minimum of 4 seconds. 2. Enter the maintenance mode. After having entered the field set mode, continue to push the inspection / test operation button for a minimum of 4 seconds.

  • Page 205: Test Operation And Field Setting For Ra Indoor Unit

    Test Operation and Field Setting for RA Indoor Unit Si18-525B 5. Test Operation and Field Setting for RA Indoor Unit Test Operation from the Remote Controller For Heat pump In cooling mode, select the lowest programmable temperature; in heating mode, select the highest programmable temperature.

  • Page 206: Jumper Settings

    Si18-525B Test Operation and Field Setting for RA Indoor Unit Jumper Settings 5.2.1 When Two Units are Installed in One Room When two indoor units are installed in one room, the two wireless remote controllers can be set for different addresses. How to set the different addresses Control PCB of the indoor unit (1) Remove the electrical box.
  • Page 207 Test Operation and Field Setting for RA Indoor Unit Si18-525B Test Operation...

  • Page 208: Part 7 System Configuration

    Si18-525B Part 7 Operation Manual 1. System Configuration................196 1.1 Operation Instructions ................196 2. Instruction....................197 2.1 Outdoor Units ..................197 2.2 Wall Mounted, Duct, Floor/Ceiling, Floor Standing, Wall Built-in Type .................198 2.3 Ceiling Mounted Cassette Type ............278 2.4 Ceiling Mounted Built-in Type ..............289 2.5 Ceiling Suspended Type ..............299 Operation Manual...

  • Page 209: System Configuration

    System Configuration Si18-525B 1. System Configuration Operation Instructions After the installation and test operation of the room air conditioner have been completed, it should be operated and handled as described below. Every user would like to know the correct method of operation of the room air conditioner, to check if it is capable of cooling (or heating) well, and to know a clever method of using it.

  • Page 210: Instruction

    Si18-525B Instruction 2. Instruction Outdoor Units Note: The instruction is for RMK(X)S series as representative. REGARDING USE Super Multi Plus System air conditioner POINTS THE CUSTOMER SHOULD BE AWARE OF COMFORT At startup After the power is initially turned on, it will take approx. 10 minutes until startup. Usually the unit will start in 5 minutes.

  • Page 211: Wall Mounted, Duct, Floor/Ceiling, Floor Standing, Wall Built-In Type

    Instruction Si18-525B Wall Mounted, Duct, Floor/Ceiling, Floor Standing, Wall Built-in Type 2.2.1 Manual Contents and Reference Page Wall Mounted Type Model Series FTK(X)S20-35D FTK(X)S50~71B FTKD50-71F FTK50-71A FTKD25/35D Read before Operation Safety Precautions Names of Parts Preparation before Operation Operation AUTO, DRY, COOL, HEAT, FAN Operation Adjusting the Air Flow Direction POWERFUL Operation...
  • Page 212 • Do not attempt to repair, relocate, modify or reinstall the air conditioner by yourself. Incorrect work will cause electric shocks, fire etc. For repairs and reinstallation, consult your Daikin dealer for advice and information. • The refrigerant used in the air conditioner is safe. Although leaks should not occur, if for some reason any refrigerant happens to leak into the room, make sure it does not come in contact with any flame as of gas heaters, kerosene heaters or gas range.
  • Page 213 Instruction Si18-525B • Do not stand or sit on the outdoor unit. Do not place any object on the unit to avoid injury, do not remove the fan guard. • Do not place anything under the indoor or outdoor unit that must be kept away from moisture. In certain conditions, moisture in the air may condense and drip.
  • Page 214 Si18-525B Instruction 2.2.3 Names of Parts FTK(X)S 20/25/35 D, FTKD 25/35 D Names of parts Indoor Unit ON/OFF Operation Manual...
  • Page 215 Instruction Si18-525B Outdoor Unit Indoor Unit 1. Air filter 12. Indoor Unit ON/OFF switch: • Push this switch once to start operation. 2. Titanium Apatite Photocatalytic Push once again to stop it. Air-Purifying Filter: • The operation mode refers to the following •...
  • Page 216 Si18-525B Instruction Remote Controller ECONO ON/OFF TEMP POWERFUL MODE SWING MOLD PROOF SENSOR CANCEL TIMER < > ARC433B46, B47 1. Signal transmitter: 8. QUIET button: OUTDOOR UNIT QUIET • It sends signals to the indoor unit. operation 9. FAN setting button: 2.
  • Page 217 Instruction Si18-525B FTK(X)S 50/60/71 B Names of parts Indoor Unit The illustration shows a 50-class unit Main unit control panel Operation Manual...
  • Page 218 Si18-525B Instruction Outdoor Unit Indoor Unit 1. Air filter 14. Indoor Unit ON/OFF switch: • Push this switch once to start operation. 2. Air purifying filter with photocatalytie Push once again to stop it. deodorizing function: • The operation mode refer to the following table. •...
  • Page 219 Instruction Si18-525B Remote Controller HOME LEAVE ON/OFF TEMP POWERFUL MODE SENSOR SWING CANCEL TIMER < > ARC433B70, B71 1. Signal transmitter: 8. QUIET button: for OUTDOOR UNIT • It sends signals to the indoor unit. QUIET operation 2. Display: 9. FAN setting button: •...
  • Page 220 Si18-525B Instruction FTK(X)D 50/60/71 F Names of parts Indoor Unit Operation Manual...
  • Page 221 Instruction Si18-525B Outdoor Unit Indoor Unit 1. Air filter 14. HOME LEAVE lamp (red): • Lights up when you use HOME LEAVE 2. Titanium Apatite Photocatalytic Operation. Air-Purifying Filter 15. Indoor Unit ON/OFF switch: 3. Air inlet • Push this switch once to start operation. 4.
  • Page 222 Si18-525B Instruction Remote Controller CANCEL TIMER < > ARC433B70, 71 1. Signal transmitter: 8. QUIET button: OUTDOOR UNIT QUIET • It sends signals to the indoor unit. operation 2. Display: 9. FAN setting button: • It displays the current settings. •...
  • Page 223 Instruction Si18-525B FTK 50/60/71 A Names of parts Indoor Unit Opening the front grille How to open the front grille CAUTION Before opening the front grille, be sure to stop the operation and turn the breaker OFF. If the power is on, the fan may rotate inside and may cause injury. Operation Manual...
  • Page 224 Si18-525B Instruction Outdoor Unit Indoor Unit 1. Air filter 14. Indoor Unit ON/OFF switch • Push this switch once to start operation. 2. Photocatalytic deodorizing filter or Push once again to stop it. Air purifying filter: • This switch is useful when the remote controller •...
  • Page 225 Instruction Si18-525B Remote Controller HOME LEAVE ON/OFF TEMP POWERFUL MODE SILENT SWING CANCEL TIMER < > ARC433A4 1. Signal transmitter: • It selects the operation mode. • It sends signals to the indoor unit. (DRY/COOL/FAN) 2. Display: 8. SILENT button: for OUTDOOR UNIT •...
  • Page 226 Si18-525B Instruction FDKS 25/35 C, CDK(X)S 25/35/50/60 C, CDKD 25/35/50/60 C, CDKD 25/35 E Names of parts Indoor Unit Operation Manual...
  • Page 227 Instruction Si18-525B Outdoor Unit Indoor Unit 1. Air outlet 10. Indoor Unit ON/OFF switch • Push this switch once to start operation. 2. Air outlet grille (Field supply) Push once again to stop it. • Appearance of the Air outlet grille and Air inlet •...
  • Page 228 Si18-525B Instruction Remote Controller < ARC433B76 > 1. Signal transmitter: 7. MODE selector button: • It sends signals to the indoor unit. • It selects the operation mode. (AUTO/DRY/COOL/HEAT/FAN) 2. Display: • It displays the current settings. 8. QUIET button: OUTDOOR UNIT QUIET (In this illustration, each section is shown operation with all its displays ON for the purpose of...
  • Page 229 Instruction Si18-525B FLXS 25/35/50/60 B Names of parts Indoor Unit The indoor unit can be installed either to the ceiling or to a wall. The descriptions contained in this man- ual show the case when installation is being carried out to the ceiling. (The methods of operation used are the same when installing to a wall.) Opening the front grille How to open the front grille :...
  • Page 230 Si18-525B Instruction Outdoor Unit ■ Indoor Unit 1. Louvers (vertical blades): 13. Indoor unit ON/OFF switch: The louvers are inside of the air outlet. • Push this switch once to start operation. 2. Air outlet Push once again to stop it. •...
  • Page 231 Instruction Si18-525B Remote Controller HOME LEAVE ON/OFF TEMP POWERFUL MODE SWING QUIET CANCEL TIMER < > ARC433B67 1. Signal Transmitter: 7. MODE selector button: • It sends signals to the indoor unit. • It selects the operation mode. (AUTO/DRY/COOL/HEAT/FAN) 2. Display: •...
  • Page 232 Si18-525B Instruction FVXS 35/50 B Names of parts Indoor Unit O F F Opening the front grille How to open the grille: Air outlet selection switch 12 13 • This setting blows air from upper outlet only. This setting automatically decides a blow •...
  • Page 233 Instruction Si18-525B Outdoor Unit Indoor Unit 1. Photocatalytic deodorizing filter and • The operation mode refers to the following Air purifying filter: table. • These filters are attached to the inside of the air Temperature Air flow Mode filters. setting rate 2.
  • Page 234 Si18-525B Instruction Remote Controller HOME LEAVE ON/OFF TEMP POWERFUL MODE SWING CANCEL TIMER < > ARC433B67 1. Signal transmitter: • It selects the operation mode. • It sends signals to the indoor unit. (AUTO/DRY/COOL/HEAT/FAN) 2. Display: 8. QUIET button: for OUTDOOR UNIT •...
  • Page 235 Instruction Si18-525B 2.2.4 Preparation before Operation Preparation Before Operation To set the batteries Position – correctly! 1. Slide the front cover to take it off. 2. Set two dry batteries (AAA). 3. Set the front cover as before. ATTENTION About batteries •...
  • Page 236 Si18-525B Instruction Preparation Before Operation To operate the remote controller • To use the remote controller, aim the transmitter at the indoor unit. If there is anything to block signals between the unit and the remote controller, such as a curtain, the unit will not operate. •...
  • Page 237 Instruction Si18-525B To set the clock 1. Press “CLOCK button”. is displayed. blinks. 2. Press “TIMER setting button” to set the clock to the present time. Holding down “ ” or “ ” button rapidly increases or decreases the time display.
  • Page 238 Si18-525B Instruction 2.2.5 AUTO · DRY · COOL · HEAT · FAN Operation AUTO · DRY · COOL · HEAT · FAN Operation The air conditioner operates with the operation mode of your choice. From the next time on, the air conditioner will operate with the same operation mode.
  • Page 239 Instruction Si18-525B To change the air flow rate setting 5. Press “FAN setting button”. DRY mode AUTO or HEAT or COOL or FAN mode Five levels of air flow rate setting from “ ” to “ ” plus “ ” “ ”...
  • Page 240 Si18-525B Instruction 2.2.6 Adjusting the Air Flow Direction FTK(X)S 20/25/35 D, FTKD 25/35 D Adjusting the Air Flow Direction You can adjust the air flow direction to increase your com- fort. To adjust the horizontal blades (flaps) 1. Press “SWING button”. •...
  • Page 241 Instruction Si18-525B To adjust the vertical blades (louvres) Hold the knob and move the louvres. (You will find a knob on the left-side and the right-side blades.) • When the unit is installed in the corner of a room, the direction of the louvers should be facing away from the wall.
  • Page 242 Si18-525B Instruction FTK(X)S 50/60/71 B Adjusting the Air Flow Direction You can adjust the air flow direction to increase your comfort. To adjust the horizontal blade (flap) 1. Press “SWING button ”. • “ ” is displayed on the LCD. HOME LEAVE 2.
  • Page 243 Instruction Si18-525B To 3-D Airflow 1. 3. Press the “SWING button ” and the “SWING button ”: the “ ” and “ ” display will light up and the flap and louvers will move in turn. To cancel 3-D Airflow 2.
  • Page 244 Si18-525B Instruction FTK(X)D 50/60/71 F Adjusting the Air Flow Direction You can adjust the air flow direction to increase your comfort. To adjust the horizontal blade (flap) 1. Press “SWING button ”. • “ ” is displayed on the LCD and the flaps will begin to swing.
  • Page 245 Instruction Si18-525B To 3-D Airflow 1. 3. Press the “SWING button ” and the “SWING button ”: the “ ” and “ ” display will light up and the flap and louvers will move in turn. To cancel 3-D Airflow 2.
  • Page 246 Si18-525B Instruction FTK 50/60/71 A Adjusting the Air Flow Direction You can adjust the air flow direction to increase your com- fort. To adjust the horizontal blade (flap) 1. Press “SWING button”. The display will light up and the flap will begin to swing.
  • Page 247 Instruction Si18-525B To adjust the vertical blades (louvres) 3. Press “SWING button”. The display will light up and the louvres will begin to swing. 4. When the louvres have reached the desired position, press the “SWING” button once more. The display will go blank. The louvres will stop moving.
  • Page 248 Si18-525B Instruction FLXS 25/35/50/60 B Adjusting the Air Flow Direction You can adjust the air flow direction to increase your com- fort. To adjust the horizontal blade (flap) 1. Press “SWING button”. • “ ” is displayed on the LCD. 2.
  • Page 249 Instruction Si18-525B To adjust the vertical blades (louvers) • When adjusting the louver, use a robust and stable stool and watch your steps carefully. Hold the knob and move the louvers. (You will find a knob on the left side and the right side blades.) Notes on flap and louvers angles •...
  • Page 250 Si18-525B Instruction FVXS 35/50 B Adjusting the Air Flow Direction You can adjust the air flow direction to increase your com- fort. To adjust the horizontal blade (flap) 1. Press “SWING button”. • “ ” is displayed on the LCD. 2.
  • Page 251 Instruction Si18-525B Air flow selection • Make air flow selection according to what suits you. When setting the air flow selection switch to • Air conditioner automatically decides the appropriate blowing pattern depending on the operating mode/situation. Operating mode Situation Blowing pattern •...
  • Page 252 Si18-525B Instruction 2.2.7 POWERFUL Operation POWERFUL Operation POWERFUL operation quickly maximizes the cooling (heating) effect in any operation mode. You can get the maximum capacity. To start POWERFUL operation 1. Press “POWERFUL button”. • POWERFUL operation ends in 20 minutes. Then the system automatically operates again with the settings which were used before POWERFUL operation.
  • Page 253 Instruction Si18-525B 2.2.8 OUTDOOR UNIT QUIET Operation OUTDOOR UNIT QUIET Operation OUTDOOR UNIT QUIET operation lowers the noise level of the outdoor unit by changing the frequency and fan speed on the outdoor unit. This function is convenient during night. To start OUTDOOR UNIT QUIET operation 1.
  • Page 254 Si18-525B Instruction 2.2.9 ECONO Operation ECONO Operation ECONO operation is a function which enables efficient operation by lowering the maximum power con- sumption value. To start ECONO operation 1. Press “ECONO button” . • “ ” is displayed on the LCD. To cancel ECONO opera- tion 2.
  • Page 255 Instruction Si18-525B 2.2.10 MOLD PROOF Operation MOLD PROOF Operation MOLD PROOF operation is a function which reduces the spread of mold by using Fan mode to lower the humidity inside the indoor unit. To set MOLD PROOF operation 1. Press and hold the MOLD PROOF button for two seconds.
  • Page 256 Si18-525B Instruction 2.2.11 HOME LEAVE Operation HOME LEAVE Operation HOME LEAVE operation is a function which allows you to record your preferred temperature and air flow rate settings. To start HOME LEAVE operation 1. Press “HOME LEAVE button”. • “ ”...
  • Page 257 Instruction Si18-525B What’s the HOME LEAVE operation? Is there a set temperature and air flow rate which is most comfortable, a set temperature and air flow rate which you use the most? HOME LEAVE operation is a function that allows you to record your favorite set temperature and air flow rate.
  • Page 258 Si18-525B Instruction 2.2.12 INTELLIGENT EYE Operation FTK(X)S 20/25/35 D, FTKD 25/35 D INTELLIGENT EYE Operation “INTELLIGENT EYE” is the infrared sensor which detects the human movement. To start INTELLIGENT EYE operation 1. Press “SENSOR button”. • “ ” is displayed on the LCD. To cancel the ECONO ON/OFF...
  • Page 259 Instruction Si18-525B “INTELLIGENT EYE” is useful for Energy Saving Energy saving operation • Change the temperature –2 ° C in heating / +2 ° C in cooling / +2 ° C in dry mode from set temperature. • Decrease the air flow rate slightly in fan operation. (In FAN mode only) Notes on “INTELLIGENT EYE”...
  • Page 260 Si18-525B Instruction FTK(X)S 50/60/71 B INTELLIGENT EYE Operation “INTELLIGENT EYE” is the infrared sensor which detects the human movement. To start INTELLIGENT EYE operation 1. Press “SENSOR button”. To cancel the INTELLIGENT EYE HOME LEAVE ON/OFF operation TEMP POWERFUL 2. Press “SENSOR button” again. [EX.] MODE SWING...
  • Page 261 Instruction Si18-525B “INTELLIGENT EYE” is useful for Energy Saving Energy saving operation • Change the temperature –2°C in heating / +2°C in cooling / +1°C in dry mode from set temperature. • Decrease the air flow rate slightly in fan operation. (In FAN mode only) Notes on “INTELLIGENT EYE”...
  • Page 262 Si18-525B Instruction FTK(X)D 50/60/71 F INTELLIGENT EYE Operation “INTELLIGENT EYE” is the infrared sensor which detects the human movement. To start INTELLIGENT EYE operation 1. Press “SENSOR button”. • “ ” is displayed on the LCD. To cancel the INTELLIGENT EYE operation 2.
  • Page 263 Instruction Si18-525B “INTELLIGENT EYE” is useful for Energy Saving. Energy saving operation • Change the temperature –2°C in heating / +2°C in cooling / +1°C in dry mode from set temperature. • Decrease the air flow rate slightly in fan operation. (In FAN mode only) Notes on “INTELLIGENT EYE”...
  • Page 264 Si18-525B Instruction 2.2.13 TIMER Operation TIMER Operation Timer functions are useful for automatically switching the air conditioner on or off at night or in the morning. You can also use OFF TIMER and ON TIMER in combination. To use OFF TIMER operation •...
  • Page 265 Instruction Si18-525B To use ON TIMER operation • Check that the clock is correct. If not, set the clock to the present time. 1. Press “ON TIMER button”. is displayed. blinks. 2. Press “TIMER Setting button” until the time setting reaches the point you like.
  • Page 266 Si18-525B Instruction 2.2.14 Note for Multi System Note for Multi System 〈〈 〉〉 What is a “Multi System”? This system has one outdoor unit connected to multiple indoor units. room room room Outdoor unit room room room Selecting the Operation Mode room room room...
  • Page 267 Instruction Si18-525B Priority Room Setting The Priority Room Setting requires initial programming during installation. Please consult your retailer or dealer for assistance. The room designated as the Priority Room takes priority in the following situations; 1. Operation Mode Priority. As the operation mode of the Priority Room takes precedence, the user can select a different operation mode from other rooms.
  • Page 268 Si18-525B Instruction 2.2.15 Care and Cleaning FTK(X)S 20/25/35 D, FTKD 25/35 D Care and Cleaning Before cleaning, be sure to stop the operation and CAUTION turn the breaker OFF. Units ■ Indoor unit, Outdoor unit and Remote controller 1. Wipe them with dry soft cloth. ■...
  • Page 269 Instruction Si18-525B Filters 1. Open the front panel. 2. Pull out the air filters. • Push a little upwards the tab at the center of each air filter, then pull it down. 3. Take off the Titanium Apatite Photocatalytic Air-Purifying Filter. Titanium Apatite Photocatalytic •...
  • Page 270 Si18-525B Instruction NOTE • Operation with dirty filters: (1) cannot deodorize the air. (2) cannot clean the air. (3) results in poor heating or cooling. (4) may cause odour. • To order Titanium Apatite Photocatalytic Air-Purifying Filter contact to the service shop there you bought the air conditioner.
  • Page 271 Instruction Si18-525B FTK(X)S 50/60/71 B Care and Cleaning Before cleaning, be sure to stop the operation and CAUTION turn the breaker OFF. Units Indoor unit, Outdoor unit and Remote controller 1. Wipe them with dry soft cloth. Front grille 1. Open the front grille. •...
  • Page 272 Si18-525B Instruction Filters 1. Open the front grille. 2. Pull out the air filters. • Push a little upwards the tab at the center of each air filter, then pull it down. 3. Take off the air tabs (3 tabs at top) purifying filter with photocatalytic deodorizing function.
  • Page 273 Instruction Si18-525B Check Check that the base, stand and other fittings of the outdoor unit are not decayed or corroded. Check that nothing blocks the air inlets and the outlets of the indoor unit and the outdoor unit. Check that the drain comes smoothly out of the drain hose during COOL or DRY operation. •...
  • Page 274 Si18-525B Instruction FTK(X)D 50/60/71 F Care and Cleaning Before cleaning, be sure to stop the operation and CAUTION turn the breaker OFF. Units Indoor unit, Outdoor unit and Remote controller 1. Wipe them with dry soft cloth. Front panel 1. Open the front panel. •...
  • Page 275 Instruction Si18-525B Filters 1. Open the front panel. 2. Pull out the air filters. • Push a little upwards the tab at the center of each air filter, then pull it down. 3. Take off the Titanium tabs (3 tabs at top) Apatite Photocatalytic Air-Purifying Filter.
  • Page 276 Si18-525B Instruction NOTE • Operation with dirty filters: (1) cannot deodorize the air. (2) cannot clean the air. (3) results in poor heating or cooling. (4) may cause odour. • To order Titanium Apatite Photocatalytic Air-Purifying Filter contact to the service shop there you bought the air conditioner.
  • Page 277 Instruction Si18-525B FTK 50/60/71 A Care and Cleaning Before cleaning, be sure to stop the operation and CAUTION turn the breaker OFF. Units Indoor unit, Outdoor unit and Remote controller 1. Wipe them with dry soft cloth. Front grille 1. Open the front grille. •...
  • Page 278 Si18-525B Instruction Filters 1. Open the front grille. 2. Pull out the air filters. • Push a little upwards the tab at the center of each air filter, then pull it down. 3. Take off the air purifying filter, photocatalytic deodorizing filter. •...
  • Page 279 Instruction Si18-525B Check Check that the base, stand and other fittings of the outdoor unit are not decayed or corroded. Check that nothing blocks the air inlets and the outlets of the indoor unit and the outdoor unit. Check that the earth wire is not disconnected or broken. Check that the drain comes smoothly out of the drain hose during COOL or DRY operation.
  • Page 280 • When using the unit in a location where dirt may easily accumulate, clean the unit more frequently. Once every 2 weeks is recommended. • Ask your DAIKIN dealer how to clean them. Cleaning the drain pan • Clean the drain pan periodically, or drain piping may be clogged with dust and may result in water leakage.
  • Page 281 • When using the unit in a location where dirt may easily accumulate, clean the unit more frequently. Once every 2 weeks is recommended. • Ask your DAIKIN dealer how to clean them. Cleaning the drain pan • Clean the drain pan periodically, or drain piping may be clogged with dust and may result in water leakage.
  • Page 282 Si18-525B Instruction FLXS 25/35/50/60 B Care and Cleaning Before cleaning, be sure to stop the operation and CAUTION turn the breaker OFF. Units Indoor unit, Outdoor unit and Remote controller 1. Wipe them with dry soft cloth. Front grille 1. Open the front grille. •...
  • Page 283 Instruction Si18-525B Filters 1. Open the front grille. 2. Pull out the air filters. • Push upwards the tab at the center of each air fil- ter, then pull it down. 3. Take off the air purifying filter, photocatalytic deodorizing filter. •...
  • Page 284 Si18-525B Instruction Check Check that the base, stand and other fittings of the outdoor unit are not decayed or corroded. Check that nothing blocks the air inlets and the outlets of the indoor unit and the outdoor unit. Check that the drain comes smoothly out of the drain hose during COOL or DRY operation. •...
  • Page 285 Instruction Si18-525B FVXS 35/50 B Care and Cleaning Before cleaning, be sure to stop the operation and CAUTION turn the breaker OFF. Units Indoor unit, Outdoor unit and Remote controller 1. Wipe them with dry soft cloth. Front grille 1. Open the front grille. •...
  • Page 286 Si18-525B Instruction Filters 1. Open the front grille. 2. Remove the air filter. • Press the claws on the right and left of the air filter down slightly, then pull upward. 3. Take off the air purifying filter, Photocatalytic deodorizing filter. •...
  • Page 287 Instruction Si18-525B Check Check that the base, stand and other fittings of the outdoor unit are not decayed or corroded. Check that nothing blocks the air inlets and the outlets of the indoor unit and the outdoor unit. Check that the drain comes smoothly out of the drain hose during COOL or DRY operation. •...
  • Page 288 Si18-525B Instruction 2.2.16 Troubleshooting Trouble Shooting These cases are not troubles. The following cases are not air conditioner troubles but have some reasons. You may just continue using it. Case Explanation Operation does not start soon. • This is to protect the air conditioner. •...
  • Page 289 Instruction Si18-525B Check again. Please check again before calling a repair person. Case Check The air conditioner does not • Hasn’t a breaker turned OFF or a fuse blown? operate. • Isn’t it a power failure? (OPERATION lamp is off) •...
  • Page 290 Si18-525B Instruction Call the service shop immediately. WARNING When an abnormality (such as a burning smell) occurs, stop operation and turn the breaker OFF. Continued operation in an abnormal condition may result in troubles, electric shocks or fire. Consult the service shop where you bought the air conditioner. Do not attempt to repair or modify the air conditioner by yourself.

  • Page 291: Ceiling Mounted Cassette Type

    Instruction Si18-525B Ceiling Mounted Cassette Type Note: The instruction is for FFQ25/35/50/60B as representative. TEST AVAILABLE TEST Operation Manual...
  • Page 292 (In case of group control system, one group of indoor units) The unit is individually operated. Outdoor unit NOTE • Contact your Daikin dealer in case of changing Unit with Unit with the combination or setting of group control and remote remote two remote controllers control system.
  • Page 293 Instruction Si18-525B the level of limiting concentration, an oxygen defi- 2. SAFETY CONSIDERATIONS ciency accident may happen. For installation of separately sold component We recommend that you read this instruction man- parts, ask a specialist. ual carefully before use to gain full advantage of the Be sure to use the separately sold component function of the air conditioner, and to avoid malfunc- parts designated by our company.
  • Page 294 Si18-525B Instruction DB: Dry bulb temperature (˚C) Do not expose animals and plants directly to the wind from the air conditioner. WB: Wet bulb temperature (˚C) Adverse influence to animals and plants may The setting temperature range of the remote con- ˚...
  • Page 295 • Operating procedure varies with heat pump type DISPLAY “ ” (AIR FLOW FLAP) and cooling only type. Contact your Daikin dealer Refer to “AIR FLOW DIRECTION ADJUST”. to confirm your system type. • To protect the unit, turn on the main power switch 6 hours before operation.
  • Page 296 • The heating capacity of the air conditioner • The movable limit of the flap is changeable. declines as the outside air temperature falls. Contact your Daikin dealer for details. In such a case, use the air conditioner in combi- nation with other heating systems.
  • Page 297 Instruction Si18-525B Press the AIR FLOW DIRECTION ADJUST button to select the air direction as following. PROGRAMMING TIME The AIR FLOW FLAP display swings as shown left and the Press the PROGRAMMING TIME button and air flow direction continuously set the time for stopping or starting the sys- varies.
  • Page 298 Si18-525B Instruction • Do not place other heaters directly below the Fig. 1 indoor unit. They may deform due to the heat. • Never place objects near the air inlet and the air outlet of the unit. It may cause deterioration in the effect or stop in the operation.
  • Page 299 Instruction Si18-525B Directly apply the type of detergent used for 5. Shut the suction grille. Refer to item No.1. cleaning ventilation fans or ovens, wait 10 min- utes, and then rinse with water. 6. After turning on the power, press FILTER SIGN RESET button.
  • Page 300 TRALIZED CONTROL) and the unit operates room becomes uneven. It is necessary to clean in a mode different to what is shown on the the inside of the indoor unit. Ask your Daikin remote controller display. dealer for details on cleaning the unit. This oper- When using a unit in a multi system, the opera- ation requires a qualified service person.
  • Page 301 • A “Pishi-pishi” squeaking sound is heard when the system is in operation or after the stop of what the malfunction code indicates to your Daikin dealer. operation. Expansion and contraction of plastic parts II. If the system does not properly operate caused by temperature change makes this noise.

  • Page 302: Ceiling Mounted Built-In Type

    Si18-525B Instruction Ceiling Mounted Built-in Type TEST AVAILABLE TEST Operation Manual...
  • Page 303 Instruction Si18-525B NOTE 1. WHAT TO DO BEFORE OPERA- • Contact your Daikin dealer in case of changing TION the combination or setting of group control and This operation manual is for the system with stan- two remote controllers control system.
  • Page 304 Si18-525B Instruction Do not remove the air outlet of the outdoor unit. WARNING The fan may get exposed and result in injury. Avoid exposure of your body directly to the Do not place items that might be damaged by cold air for a long time, or avoid excessive water under the indoor unit.
  • Page 305 Instruction Si18-525B Regarding wiring 3. OPERATION RANGE • All wiring must be performed by an authorized If the temperature or the humidity is beyond the fol- electrician. lowing conditions, safety devices may work and the To do wiring, ask your dealer. Never do it by yourself. air conditioner may not operate, or sometimes, •...
  • Page 306 Refer to figure 1 on page [1] Refer to “HOW TO CLEAN THE AIR FILTER”. • Operating procedure varies with heat pump type and cooling only type. Contact your Daikin dealer DISPLAY “ ” (DEFROST) to confirm your system type.
  • Page 307 Instruction Si18-525B • An indoor fan runs to discharge a gentle wind COOLING, HEATING, AUTOMATIC, FAN, automatically until the temperature inside the air AND PROGRAM DRY OPERATION conditioner reaches a certain level. At this time, Operate in the following order. the remote controller displays “...
  • Page 308 Si18-525B Instruction • Keep doors and windows closed. If the doors and TIMER MODE START/STOP windows remain open, room air will flow out and cause to decrease the effect of cooling and heating. • Do not place other heaters directly below the Press the TIMER MODE START/STOP button indoor unit.
  • Page 309 Instruction Si18-525B 1. Open the suction grille. NOTE Slide both knobs simultaneously as shown and • Do not wash the air conditioner with hot water of then pull them downward. more than 50˚C, as doing so may result in discol- (Do the same procedure for closing.) oration and/or deformation.
  • Page 310 • When the main power switch is turned on, some becomes uneven. It is necessary to clean the watts of electricity is being used even if the sys- inside of the indoor unit. Ask your Daikin dealer tem is not operating. for details on cleaning the unit. This operation Turn off the main power supply switch for saving requires a qualified service person.
  • Page 311 • If the heat source of the room is excessive INSPECTION which a malfunction occurs (when cooling). display MALFUNCTION CODE Cooling effect decreases if heat gain of the room is too large. Measure: Notify your Daikin dealer and inform him/her of the display. 3P156215-3 Operation Manual...

  • Page 312: Ceiling Suspended Type

    Si18-525B Instruction Ceiling Suspended Type 5 12 TEST AVAILABLE TEST Operation Manual...
  • Page 313 CONTROL SYSTEM with standard control. Before initiating operation, This system provides two other control systems contact your Daikin dealer for the operation that cor- beside individual control (one remote controller con- responds to your system. trols one indoor unit) system. Confirm the following if your unit is of the following control system type.
  • Page 314 Si18-525B Instruction • The precautions described below are WARN- Ask your dealer to move and reinstall the air ING and CAUTION. These are very important conditioner. precautions concerning safety. Be sure to Incomplete installation may result in a failure, a observe all of them without fail.
  • Page 315 Instruction Si18-525B Be sure the air conditioner is electrically grounded. HEATING Do not connect the grounding conductor to a gas pipe, INDOOR OUTDOOR water pipe, lightning arrester, and the grounding conduc- OUTDOOR UNIT TEMPERATURE TEMPERATURE tor for a telephone. – 9 to 21 Imperfect grounding work may result in an electric shock.
  • Page 316 Si18-525B Instruction • Make sure that a separate power supply cir- DISPLAY “ ” “ ” “ ” “ ” “ ” cuit is provided for this air conditioner and (OPERATION MODE) that all electrical work is carried out by quali- This display shows the current OPERATION fied personnel according to local laws and MODE.
  • Page 317 DEFROST OPERATION, the system returns to Refer to figure 1 on page [1] HEATING OPERATION. • Operating procedure varies with heat pump type and cooling only type. Contact your Daikin dealer Regarding outside air temperature and heat- to confirm your system type. ing capacity •...
  • Page 318 Your hand may get caught if you attempt to make adjustments while the unit is swinging. A. UP AND DOWN DIRECTION • The movable limit of the flap is changeable. Con- tact your Daikin dealer for details. Operation Manual...
  • Page 319 Instruction Si18-525B • Press the TIMER ON/OFF BUTTON once again PROGRAM TIMER OPERATION to cancel programming. The display vanishes. Operate in the following order. • The timer is operated in the following two ways. • Programming the stop time ( ..
  • Page 320 Si18-525B Instruction HOW TO CLEAN THE AIR FILTER 8. MAINTENANCE Clean the air filter when the display shows “ ” (FOR SERVICE PERSONNEL) (TIME TO CLEAN AIR FILTER). It will display that it will operate for a set amount of ONLY A QUALIFIED SERVICE PERSON IS time.
  • Page 321 Instruction Si18-525B HOW TO CLEAN AIR OUTLET AND OUT- Turn on the main power supply switch SIDE PANELS • The display on the remote controller will be shown when the power is turned on. • Clean with soft cloth. • To protect the unit, turn on the main power switch •...
  • Page 322 It is necessary to clean the This is because operating mode is controlled by a inside of the indoor unit. Ask your Daikin dealer micro computer, as shown below, depending on for details on cleaning the unit. This operation the operating mode of the other connected indoor requires a qualified service person.
  • Page 323 • If the heat source of the room is excessive INSPECTION No. in which a (when cooling). display malfunction occurs. Cooling effect decreases if heat gain of the room is too large. MALFUNCTION CODE Measure: Notify your Daikin dealer and inform him/her of the display. 3PN05140-1T Operation Manual...

  • Page 324: Part 8 Troubleshooting

    Si18-525B Part 8 Troubleshooting 1. Caution for Diagnosis.................313 1.1 Troubleshooting with Operation Lamp ..........313 1.2 Troubleshooting with the LED on the SkyAir Indoor Unit .....314 1.3 Troubleshooting with the LED on the Outdoor Unit......315 1.4 Troubleshooting with the LED on the BP Unit ........316 2.
  • Page 325 Si18-525B 7. Troubleshooting for Outdoor Unit............366 7.1 Faulty Outdoor Unit PCB..............366 7.2 Actuation of High Pressure Switch ............367 7.3 Actuation of Low Pressure Switch............368 7.4 Compressor Motor Lock ...............369 7.5 Malfunction of Outdoor Unit Fan Motor ..........370 7.6 Malfunction of Moving Part of Electronic Expansion Valve ....371 7.7 Abnormal Discharge Pipe Temperature ..........372 7.8 Malfunction of Thermistor for Outdoor Air (R1T) ........373 7.9 Malfunction of Discharge Pipe Thermistor (R3T) .........374...

  • Page 326: Caution For Diagnosis

    Si18-525B Caution for Diagnosis 1. Caution for Diagnosis Troubleshooting with Operation Lamp The operation lamp flashes when any of the following errors is detected. 1. When a protection device of the indoor or outdoor unit is activated or when the thermistor malfunctions, disabling equipment operation.

  • Page 327: Troubleshooting With The Led On The Skyair Indoor Unit

    Caution for Diagnosis Si18-525B In case of FLK 25/35/50/60 A Series FLXS 25/35/50/60 B Series OPERATION lamp (green) (Q0341) Caution: Operation stops suddenly. (Operation lamp blinks.) Cause of above trouble could be "Operation mode butting". Check followings; Are the operation modes all the same for indoor units connected to Multi system outdoor unit? If not set all indoor units to the same operation mode and confirm that the operation lamp is not blinking.

  • Page 328: Troubleshooting With The Led On The Outdoor Unit

    Si18-525B Caution for Diagnosis Troubleshooting with the LED on the Outdoor Unit There are green and orange LEDs on the PCB. The blinking green LED indicates normal equipment condition, and the OFF condition of the orange LED indicates normal equipment condition.

  • Page 329: Troubleshooting With The Led On The Bp Unit

    Caution for Diagnosis Si18-525B Troubleshooting with the LED on the BP Unit LEDA(H1P) LED1(H2P) LED2(H3P) LED3(H4P) LED4(H5P) (Q0395) Troubleshooting...

  • Page 330: Service Check Function

    Si18-525B Service Check Function Service Check Function RA Indoor Unit Wireless Remote Controller In the ARC433 series remote controller, the temperature display sections on the main unit indicate corresponding codes. Check Method 1 1. When the timer cancel button is held down for 5 seconds, a “00” indication flashes on the temperature display section.
  • Page 331 Service Check Function Si18-525B Check Method 2 1. Enter the diagnosis mode. Press the 3 buttons (TEMP ,TEMP , MODE) simultaneously. (R4272) The digit of the number of tens blinks. Try again from the start when the digit does not blink. (R4273) 2.
  • Page 332 Si18-525B Service Check Function 5. Press the TEMP button. Press TEMP or TEMP and change the digit until you hear the sound of “beep”. (R4277) 6. Diagnose by the sound. “pi” : The both numbers of tens and units do not accord with the error code. “pi pi”...

  • Page 333: Skyair Indoor Unit Inspection/Test Button

    Service Check Function Si18-525B SkyAir Indoor Unit INSPECTION/TEST Button Explanation The following modes can be selected by using the [Inspection/Test Operation] button on the remote control. Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Depress Inspection/Test Operation button for more than 4 seconds.

  • Page 334: Skyair Indoor Unit Wired Remote Controller

    Si18-525B Service Check Function SkyAir Indoor Unit Wired Remote Controller Explanation If operation stops due to malfunction, the remote controller’s operation LED blinks, and malfunction code is displayed. (Even if stop operation is carried out, malfunction contents are displayed when the inspection mode is entered.) The malfunction code enables you to tell what kind of malfunction caused operation to stop.

  • Page 335: Skyair Indoor Unit Wireless Remote Controller

    Service Check Function Si18-525B SkyAir Indoor Unit Wireless Remote Controller If equipment stops due to a malfunction, the operation indicating LED on the light reception section flashes. The malfunction code can be determined by following the procedure described below. (The malfunction code is displayed when an operation error has occurred.
  • Page 336 Si18-525B Service Check Function Troubleshooting...

  • Page 337: Sky Air Indoor Unit Error Codes And Led Indication

    Service Check Function Si18-525B Sky Air Indoor Unit Error Codes and LED Indication Symbols : Blinks : On : Off — : No connection with troubleshooting : High probability of malfunction : Possibility of malfunction : Low probability of malfunction —...

  • Page 338: Malfunction Code Indication By Outdoor Unit Pcb

    Si18-525B Service Check Function Malfunction Code Indication by Outdoor Unit PCB <Monitor mode> Contents of malfunction Malfunction To enter the monitor mode, push the code MODE button (BS1) when in “Setting mode 1”. Abnormal discharge pressure HPS activated Abnormal suction pressure Abnormal Pe Compressor lock Detection of INV compressor lock...
  • Page 339 Service Check Function Si18-525B Malfunction Confirmation of malfunction 1 Confirmation of malfunction 2 Confirmation of malfunction 3 code LED1 LED2 LED3 LED4 LED5 LED6 LED7 LED1 LED2 LED3 LED4 LED5 LED6 LED7 LED3 LED1 LED2 LED4 LED5 LED6 LED7 : ON : ON Malfunction code 1st Malfunction code 2nd...

  • Page 340: List Of Malfunction Code

    Si18-525B List of Malfunction Code 3. List of Malfunction Code 9: Blink 8: ON 7: OFF Malfunction Malfunction contents Page Referred code RA Indoor SkyAir BP Unit Outdoor Unit Indoor Unit Unit Indoor Error of external protection device — — —...
  • Page 341 List of Malfunction Code Si18-525B 9: Blink 8: ON 7: OFF Malfunction Malfunction contents Page Referred code RA Indoor SkyAir BP Unit Outdoor Unit Indoor Unit Unit Outdoor Malfunction of inverter radiating fin temperature rise — — — Unit Inverter compressor motor grounding, short circuit —...

  • Page 342: Troubleshooting For Ra Indoor Unit

    Si18-525B Troubleshooting for RA Indoor Unit Troubleshooting for RA Indoor Unit Indoor Unit PCB Abnormality Remote Controller Display Method of Evaluation of zero-cross detection of power supply by indoor unit. Malfunction Detection Malfunction When there is no zero-cross detection in approximately 10 continuous seconds. Decision Conditions Supposed...

  • Page 343: Freeze-Up Protection Control Or High Pressure Control

    Troubleshooting for RA Indoor Unit Si18-525B Freeze-up Protection Control or High Pressure Control Remote Controller Display Method of High pressure control (heat pump model only) Malfunction During heating operations, the temperature detected by the indoor heat exchanger thermistor is used for the high pressure control (stop, outdoor fan stop, etc.) Detection The freeze-up protection control (operation halt) is activated during cooling operation according to the temperature detected by the indoor unit heat exchanger thermistor.
  • Page 344 Si18-525B Troubleshooting for RA Indoor Unit Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.06 Check the air passage. Refer to P.338 Is there any Provide sufficient air passage. short-circuit? Check the intake air filter.

  • Page 345: Fan Motor Or Related Abnormality

    Troubleshooting for RA Indoor Unit Si18-525B Fan Motor or Related Abnormality 4.3.1 AC Motor (Wall FTKD 25/35 D series, Duct, Floor / Ceiling) Remote Controller Display Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor operation.
  • Page 346 Si18-525B Troubleshooting for RA Indoor Unit 4.3.2 DC Motor (Wall FTK(X)S 20~35 D series and 50~71 class, Floor) Remote Controller Display Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor operation. Malfunction Detection Malfunction...
  • Page 347 Troubleshooting for RA Indoor Unit Si18-525B Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.01 Turn off power supply Refer to P.337 and rotate fan by hand. Check No.02 Does fan rotate Replace fan motor.

  • Page 348: Thermistor Or Related Abnormality (Indoor Unit)

    Si18-525B Troubleshooting for RA Indoor Unit Thermistor or Related Abnormality (Indoor Unit) Remote Controller Display Method of The temperatures detected by the thermistors are used to determine thermistor errors. Malfunction Detection Malfunction When the thermistor input is more than 4.96 V or less than 0.04 V during compressor operation ∗...

  • Page 349: Shutter Drive Motor / Shutter Limit Switch Abnormality

    Troubleshooting for RA Indoor Unit Si18-525B Shutter Drive Motor / Shutter Limit Switch Abnormality Remote Controller Display The shutter open / close performance is detected by the limit switch attached on its structure. In Method of this way, the shutter drive motor and the shutter limit switch are checked for failure. Malfunction Detection Malfunction...

  • Page 350: Check

    Si18-525B Troubleshooting for RA Indoor Unit Check 4.6.1 Fan Motor Connector Output Check Check No.01 1. Check connector connection. 2. Check motor power supply voltage output (pins 4-7 and 4-8). 3. Check motor control voltage (pins 4-3). 4. Check rotation command voltage output (pins 4-2). 5.
  • Page 351 Troubleshooting for RA Indoor Unit Si18-525B 4.6.3 Thermistor Resistance Check Check No.06 Remove the connectors of the thermistors on the PCB, and measure the resistance of each thermistor using tester. The relationship between normal temperature and resistance is shown in the graph and the table below.
  • Page 352 Si18-525B Troubleshooting for RA Indoor Unit 4.6.4 Power Supply Waveforms Check Check No.10 Measure the power supply waveform between pins 1 and 3 on the terminal board, and check the waveform disturbance. Check to see if the power supply waveform is a sine wave (Fig.1). Check to see if there is waveform disturbance near the zero cross (sections circled in Fig.2) [Fig.1] [Fig.2]...

  • Page 353: Troubleshooting For Skyair Indoor Unit

    Troubleshooting for SkyAir Indoor Unit Si18-525B Troubleshooting for SkyAir Indoor Unit Indoor Unit PCB Abnormality Remote Controller Display Applicable FFQ, FCQ, FBQ, FHQ Models Method of Check data from E²PROM. Malfunction Detection Malfunction When data could not be correctly received from the E²PROM Decision E²PROM : Type of nonvolatile memory.

  • Page 354: Malfunction Of Drain Water Level System (Float Type)

    Si18-525B Troubleshooting for SkyAir Indoor Unit Malfunction of Drain Water Level System (Float Type) Remote Controller Display Applicable FFQ, FCQ, FBQ, FHQ Models Method of By float switch OFF detection Malfunction Detection Malfunction When rise of water level is not a condition and the float switch goes OFF. Decision Conditions Supposed...
  • Page 355 Troubleshooting for SkyAir Indoor Unit Si18-525B Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. If “A3” is detected by a PC board which is not mounted with X15A, the PC board is defective.

  • Page 356: Malfunction Of Drain System

    Si18-525B Troubleshooting for SkyAir Indoor Unit Malfunction of Drain System Remote Controller Display Applicable FHQ-BU Models Method of Water leakage is detected based on float switch ON/OFF operation while the compressor is in non-operation. Malfunction Detection Malfunction When the float switch changes from ON to OFF while the compressor is in non-operation. Decision Conditions Supposed...

  • Page 357: Indoor Unit Fan Motor Lock

    Troubleshooting for SkyAir Indoor Unit Si18-525B Indoor Unit Fan Motor Lock Remote Controller Display Applicable FHQ-BU Models Method of Detection by failure of signal for detecting number of turns to come from the fan motor Malfunction Detection Malfunction When number of turns can’t be detected even when output voltage to the fan is maximum Decision Conditions Supposed...

  • Page 358: Malfunction Of Indoor Unit Fan Motor

    Si18-525B Troubleshooting for SkyAir Indoor Unit Malfunction of Indoor Unit Fan Motor Remote Controller Display Applicable FFQ, FCQ, FBQ Models Method of Detection of abnormal fan speed by signal from the fan motor Malfunction Detection Malfunction When fan speed does not increase Decision Conditions Supposed...
  • Page 359 Troubleshooting for SkyAir Indoor Unit Si18-525B Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.01 Turn off the power supply. Refer to P.357 Is there any foreign matter Remove the foreign matter.

  • Page 360: Swing Flap Motor Malfunction / Lock

    Si18-525B Troubleshooting for SkyAir Indoor Unit Swing Flap Motor Malfunction / Lock Remote Controller Display Applicable FHQ-BU Models Method of Utilizes ON/OFF of the limit switch when the motor turns. Malfunction Detection Malfunction When ON/OFF of the microswitch for positioning cannot be reversed even though the swing flap motor is energized for a specified amount of time (about 30 seconds).
  • Page 361 Troubleshooting for SkyAir Indoor Unit Si18-525B Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. the connectors correctly connected Connect correctly. to X29A and X14A on the PC board? the limit switch's transfer Connect correctly.

  • Page 362: Malfunction Of Capacity Setting

    Si18-525B Troubleshooting for SkyAir Indoor Unit Malfunction of Capacity Setting Remote Controller Display Applicable FFQ, FCQ, FBQ, FHQ Models Method of Capacity is determined according to resistance of the capacity setting adaptor and the memory inside the IC memory on the indoor unit PCB, and whether the value is normal or abnormal is Malfunction determined.

  • Page 363: Malfunction Of Heat Exchanger Thermistor (R2T)

    Troubleshooting for SkyAir Indoor Unit Si18-525B Malfunction of Heat Exchanger Thermistor (R2T) Remote Controller Display Applicable FFQ, FCQ, FBQ, FHQ Models Method of Malfunction detection is carried out by temperature detected by heat exchanger sensor. Malfunction Detection Malfunction When the heat exchanger thermistor becomes disconnected or shorted while the unit is running. Decision Conditions Supposed...

  • Page 364: Malfunction Of Heat Exchanger Thermistor (R3T)

    Si18-525B Troubleshooting for SkyAir Indoor Unit Malfunction of Heat Exchanger Thermistor (R3T) Remote Controller Display Applicable FFQ, FCQ, FBQ, FHQ Models Method of Malfunction detection is carried out by temperature detected by heat exchanger sensor (R3T). Malfunction Detection Malfunction When the heat exchanger thermistor becomes disconnected or shorted while the unit is running. Decision Conditions Supposed...

  • Page 365: Malfunction Of Suction Air Thermistor

    Troubleshooting for SkyAir Indoor Unit Si18-525B 5.10 Malfunction of Suction Air Thermistor Remote Controller Display Applicable FFQ, FCQ, FBQ, FHQ Models Method of Malfunction detection is carried out by temperature detected by suction air temperature sensor. Malfunction Detection Malfunction When the suction air temperature sensor’s thermistor becomes disconnected or shorted while the unit is running.

  • Page 366: Malfunction Of Remote Controller Thermistor

    Si18-525B Troubleshooting for SkyAir Indoor Unit 5.11 Malfunction of Remote Controller Thermistor Remote Controller Display Applicable FFQ, FCQ, FBQ, FHQ Models Method of Even if remote controller thermistor is faulty, system is possible to operate by system thermistor. Malfunction detection is carried out by temperature detected by remote controller thermistor. Malfunction Detection Malfunction...

  • Page 367: Transmission Error (Between Indoor Unit And Remote Controller)

    Troubleshooting for SkyAir Indoor Unit Si18-525B 5.12 Transmission Error (between Indoor Unit and Remote Controller) Remote Controller Display Applicable FFQ, FCQ, FBQ, FHQ Models Method of Microcomputer checks if transmission between indoor unit and remote controller is normal. Malfunction Detection Malfunction When transmission is not carried out normally for a certain amount of time Decision...

  • Page 368: Transmission Error (Between Main And Sub Remote Controller)

    Si18-525B Troubleshooting for SkyAir Indoor Unit 5.13 Transmission Error (between Main and Sub Remote Controller) Remote Controller Display Applicable FFQ, FCQ, FBQ, FHQ Models Method of In case of controlling with 2- remote controller, check the system using microcomputer if signal transmission between indoor unit and remote controller (main and sub) is normal.

  • Page 369: Malfunction Of Field Setting Switch

    Troubleshooting for SkyAir Indoor Unit Si18-525B 5.14 Malfunction of Field Setting Switch Remote Controller Display Applicable FFQ, FCQ, FBQ, FHQ Models Method of Malfunction Detection Incorrect field setting Malfunction Decision Conditions Supposed Indoor-Outdoor (BP) transmission line Faulty remote controller wiring Causes Troubleshooting Be sure to turn off power switch before connect or disconnect connector,...

  • Page 370: 5.15 Check

    Si18-525B Troubleshooting for SkyAir Indoor Unit 5.15 Check Check No. 01 Check for Fan Motor Connector (Power Supply Line) (1) Turn the power supply off. With the relay connector disconnected, measure the resistance between UVW phases of the connector (3 cores) at the motor side, then make sure that the resistance between each phase is balanced and not short-circuited.
  • Page 371 Troubleshooting for SkyAir Indoor Unit Si18-525B Check No. 02 Check for Thermistors Disconnect the thermistor connector from PCB, then measure the resistance by using a tester. Unit : kΩ Thermistor temperature and resistance characteristics Temperature °C -6.0 90.8 88.0 -4.0 81.7 79.1 -2.0...

  • Page 372: Troubleshooting For Bp Unit

    Si18-525B Troubleshooting for BP Unit 6. Troubleshooting for BP Unit Malfunction of Electronic Expansion Valve Remote Controller Display Method of Detection by checking continuity and lack of connector. Malfunction Detection Malfunction Malfunction is determined by no common voltage applied when turning the power supply on. Decision Conditions Supposed...

  • Page 373: Faulty Bp Unit Pcb

    Troubleshooting for BP Unit Si18-525B Faulty BP Unit PCB Remote Controller Display Method of Check data from E²PROM Malfunction Detection Malfunction When data could not be correctly received from the E²PROM E²PROM : Type of nonvolatile memory. Maintains memory contents even when the power Decision supply is turned off.

  • Page 374: Faulty Bp Liquid Or Gas Pipe Thermistor

    Si18-525B Troubleshooting for BP Unit Faulty BP Liquid or Gas Pipe Thermistor Remote Controller Display Method of Malfunction Detection Malfunction When the BP liquid or gas pipe temperature sensor became short-circuited or open. Decision Conditions Supposed Faulty BP liquid or gas pipe temperature sensor Causes Faulty connectors connection of BP liquid or gas pipe temperature sensor Troubleshooting...

  • Page 375: Transmission Error Between Indoor Unit And Bp Unit

    Troubleshooting for BP Unit Si18-525B Transmission Error between Indoor Unit and BP Unit Outdoor Unit Indication Method of The data received from the BP unit in indoor unit-BP unit signal transmission is checked whether it is normal. Malfunction Detection Malfunction When the data sent from the BP unit cannot be received normally, or when the content of the data is abnormal.
  • Page 376 Si18-525B Troubleshooting for BP Unit Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.14 Push and hold the RESET button on the outdoor unit PCB for 5 seconds Refer to P.365 Does the malfunction Normal...

  • Page 377: Transmission Error Between Outdoor Unit And Bp Unit

    Troubleshooting for BP Unit Si18-525B Transmission Error between Outdoor Unit and BP Unit Outdoor Unit Indication Method of Transmission error is detected when the outdoor unit could not received the data from BP unit correctly. Malfunction Detection Malfunction When the data from BP unit could not be correctly received continuously for 10 minutes Decision Conditions Supposed...

  • Page 378: Check

    Si18-525B Troubleshooting for BP Unit Check 6.6.1 Power Supply Waveforms Check Check No.14 Measure the power supply waveform between pins 1 and 3 on the terminal board, and check the waveform disturbance. Check to see if the power supply waveform is a sine wave (Fig.1). Check to see if there is waveform disturbance near the zero cross (sections circled in Fig.2) [Fig.1] [Fig.2]...

  • Page 379: Troubleshooting For Outdoor Unit

    Troubleshooting for Outdoor Unit Si18-525B 7. Troubleshooting for Outdoor Unit Faulty Outdoor Unit PCB Remote Controller Display Applicable AII outdoor unit models Models Method of Check data from E²PROM Malfunction Detection Malfunction When data could not be correctly received from the E²PROM Decision E²PROM : Type of nonvolatile memory.

  • Page 380: Actuation Of High Pressure Switch

    Si18-525B Troubleshooting for Outdoor Unit Actuation of High Pressure Switch Remote Controller Display Applicable AII outdoor unit models Models Method of Abnormality is detected when the contact of the high pressure protection switch opens. Malfunction Detection Malfunction Error is generated when the HPS activation count reaches the number specific to the operation mode.

  • Page 381: Actuation Of Low Pressure Switch

    Troubleshooting for Outdoor Unit Si18-525B Actuation of Low Pressure Switch Remote Controller Display Applicable AII outdoor unit models Models Method of Malfunction Detection Malfunction Error is generated when the low pressure is dropped under specific pressure. Decision Conditions Supposed Abnormal drop of low pressure Defect of low pressure sensor Causes Defect of outdoor unit PCB...

  • Page 382: Compressor Motor Lock

    Si18-525B Troubleshooting for Outdoor Unit Compressor Motor Lock Remote Controller Display Applicable AII outdoor unit models Models Method of Inverter PC board takes the position signal from UVWN line connected between the inverter and compressor, and detects the position signal pattern. Malfunction Detection Malfunction...

  • Page 383: Malfunction Of Outdoor Unit Fan Motor

    Troubleshooting for Outdoor Unit Si18-525B Malfunction of Outdoor Unit Fan Motor Remote Controller Display Applicable AII outdoor unit models Models Method of Malfunction of fan motor system is detected according to the fan speed detected by Hall IC when the fan motor runs. Malfunction Detection Malfunction...

  • Page 384: Malfunction Of Moving Part Of Electronic Expansion Valve

    Si18-525B Troubleshooting for Outdoor Unit Malfunction of Moving Part of Electronic Expansion Valve Remote Controller Display Applicable AII outdoor unit models Models Method of Check disconnection of connector Check continuity of expansion valve coil Malfunction Detection Malfunction Error is generated under no common power supply when the power is on. Decision Conditions Supposed...

  • Page 385: Abnormal Discharge Pipe Temperature

    Troubleshooting for Outdoor Unit Si18-525B Abnormal Discharge Pipe Temperature Remote Controller Display Applicable AII outdoor unit models Models Method of Abnormality is detected according to the temperature detected by the discharge pipe temperature sensor. Malfunction Detection Malfunction When the discharge pipe temperature rises to an abnormally high level When the discharge pipe temperature rises suddenly Decision Conditions...

  • Page 386: Malfunction Of Thermistor For Outdoor Air (R1T)

    Si18-525B Troubleshooting for Outdoor Unit Malfunction of Thermistor for Outdoor Air (R1T) Remote Controller Display Applicable AII outdoor unit models Models Method of The abnormal detection is based on current detected by current sensor. Malfunction Detection Malfunction When the outdoor air temperature sensor has short circuit or open circuit. Decision Conditions Supposed...

  • Page 387: Malfunction Of Discharge Pipe Thermistor (R3T)

    Troubleshooting for Outdoor Unit Si18-525B Malfunction of Discharge Pipe Thermistor (R3T) Remote Controller Display Applicable AII outdoor unit models Models Method of Malfunction is detected from the temperature detected by discharge pipe temperature thermistor. Malfunction Detection Malfunction When a short circuit or an open circuit in the discharge pipe temperature thermistor is detected. Decision Conditions Supposed...

  • Page 388: Malfunction Of Thermistor (R2T) For Suction Pipe

    Si18-525B Troubleshooting for Outdoor Unit 7.10 Malfunction of Thermistor (R2T) for Suction Pipe Remote Controller Display Applicable AII outdoor unit models Models Method of Malfunction is detected from the temperature detected by the suction pipe temperature thermistor. Malfunction Detection Malfunction When a short circuit or an open circuit in the suction pipe temperature thermistor is detected.

  • Page 389: Malfunction Of Thermistor (R4T) For Outdoor Unit Heat Exchanger

    Troubleshooting for Outdoor Unit Si18-525B 7.11 Malfunction of Thermistor (R4T) for Outdoor Unit Heat Exchanger Remote Controller Display Applicable AII outdoor unit models Models Method of Malfunction is detected from the temperature detected by the heat exchanger thermistor. Malfunction Detection Malfunction When a short circuit or an open circuit in the heat exchange thermistor is detected.

  • Page 390: Malfunction Of Receiver Gas Pipe Thermistor (R5T)

    Si18-525B Troubleshooting for Outdoor Unit 7.12 Malfunction of Receiver Gas Pipe Thermistor (R5T) Remote Controller Display Applicable AII outdoor unit models Models Method of Malfunction is detected according to the temperature detected by receiver gas pipe thermistor (= Subcooling heat exchanger gas pipe thermistor). Malfunction Detection Malfunction...

  • Page 391: Outdoor Unit: Malfunction Of High Pressure Sensor

    Troubleshooting for Outdoor Unit Si18-525B 7.13 Outdoor Unit: Malfunction of High Pressure Sensor Remote Controller Display Applicable AII outdoor unit models Models Method of Malfunction is detected from the pressure detected by the high pressure sensor. Malfunction Detection Malfunction When the high pressure sensor is short circuit or open circuit. Decision Conditions Supposed...

  • Page 392: Malfunction Of Low Pressure Sensor

    Si18-525B Troubleshooting for Outdoor Unit 7.14 Malfunction of Low Pressure Sensor Remote Controller Display Applicable AII outdoor unit models Models Method of Malfunction is detected from pressure detected by low pressure sensor. Malfunction Detection Malfunction When the low pressure sensor is short circuit or open circuit. Decision Conditions Supposed...

  • Page 393: Malfunction Of Inverter Radiating Fin Temperature Rise

    Troubleshooting for Outdoor Unit Si18-525B 7.15 Malfunction of Inverter Radiating Fin Temperature Rise Remote Controller Display Applicable AII outdoor unit models Models Method of Fin temperature is detected by the thermistor of the radiation fin. Malfunction Detection Malfunction When the temperature of the inverter radiation fin increases above 99°C. Decision Conditions Supposed...

  • Page 394: Inverter Compressor Abnormal

    Si18-525B Troubleshooting for Outdoor Unit 7.16 Inverter Compressor Abnormal Remote Controller Display Applicable AII outdoor unit models Models Method of Malfunction is detected from current flowing in the power transistor. Malfunction Detection Malfunction When an excessive current flows in the power transistor. (Instantaneous overcurrent also causes activation.) Decision Conditions...

  • Page 395: Inverter Current Abnormal

    Troubleshooting for Outdoor Unit Si18-525B 7.17 Inverter Current Abnormal Remote Controller Display Applicable AII outdoor unit models Models Method of Malfunction is detected by current flowing in the power transistor. Malfunction Detection Malfunction When overload in the compressor is detected. Decision Conditions Supposed...

  • Page 396: Inverter Start Up Error

    Si18-525B Troubleshooting for Outdoor Unit 7.18 Inverter Start up Error Remote Controller Display Applicable AII outdoor unit models Models Method of Malfunction is detected from current flowing in the power transistor. Malfunction Detection Malfunction When overload in the compressor is detected during startup Decision Conditions Supposed...

  • Page 397: Malfunction Of Transmission Between Inverter And Control Pcb

    Troubleshooting for Outdoor Unit Si18-525B 7.19 Malfunction of Transmission between Inverter and Control PCB Remote Controller Display Applicable AII outdoor unit models Models Method of Check the communication state between inverter PCB and control PCB by micro-computer. Malfunction Detection Malfunction When the correct communication is not conducted in certain period.
  • Page 398 Si18-525B Troubleshooting for Outdoor Unit Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Are the connectors between the main PC board (A1P) and Connect transmission wiring and inverter PCB turn on again.

  • Page 399: Malfunction Of Inverter Radiating Fin Temperature Rise Sensor

    Troubleshooting for Outdoor Unit Si18-525B 7.20 Malfunction of Inverter Radiating Fin Temperature Rise Sensor Remote Controller Display Applicable AII outdoor unit models Models Method of Resistance of radiation fin thermistor is detected when the compressor is not operating. Malfunction Detection Malfunction When the resistance value of thermistor becomes a value equivalent to open or short circuited status.

  • Page 400: Faulty Combination Of Inverter And Fan Driver

    Si18-525B Troubleshooting for Outdoor Unit 7.21 Faulty Combination of Inverter and Fan Driver Remote Controller Display Applicable AII outdoor unit models Models Method of Check the communication state between inverter PCB and control PCB by micro-computer. Malfunction Detection Malfunction When the communication data about inverter PCB type is incorrect. Decision Conditions Supposed...

  • Page 401: Low Pressure Drop Due To Refrigerant Shortage Or Electronic Expansion Valve Failure

    Troubleshooting for Outdoor Unit Si18-525B 7.22 Low Pressure Drop Due to Refrigerant Shortage or Electronic Expansion Valve Failure Remote Controller Display Applicable AII outdoor unit models Models Method of Short of gas malfunction is detected by discharge pipe temperature thermistor. Malfunction Detection Malfunction...

  • Page 402: Power Supply Insufficient Or Instantaneous Failure

    Si18-525B Troubleshooting for Outdoor Unit 7.23 Power Supply Insufficient or Instantaneous Failure Remote Controller Display Applicable AII outdoor unit models Models Method of Detection of voltage of main circuit capacitor built in the inverter and power supply voltage. Malfunction Detection Malfunction Decision Conditions...
  • Page 403 Troubleshooting for Outdoor Unit Si18-525B Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. connection wire connected Repair wiring. between the connector X205A and X25A? Turn on again. Does the voltage between terminals P Replace the inverter PCB.

  • Page 404: 7.24 Check Operation Not Executed

    Si18-525B Troubleshooting for Outdoor Unit 7.24 Check Operation not Executed Remote Controller Display Applicable AII outdoor unit models Models Method of Check operation is executed or not Malfunction Detection Malfunction Malfunction is decided when the unit starts operation without check operation. Decision Conditions Supposed...

  • Page 405: Malfunction In Other Indoor Unit Or Other Bp Unit

    Troubleshooting for Outdoor Unit Si18-525B 7.25 Malfunction in other Indoor Unit or other BP Unit Remote Controller Display Applicable AII indoor unit models Models Method of Malfunction Detection Malfunction Decision Conditions Supposed Malfunction of electronic expansion valve in other BP unit Defect of PCB of other indoor unit or other BP unit Causes Troubleshooting...

  • Page 406: Mismatching Of Indoor Unit, Bp Unit And Outdoor Unit

    Si18-525B Troubleshooting for Outdoor Unit 7.26 Mismatching of Indoor Unit, BP Unit and Outdoor Unit Remote Controller Display Applicable AII indoor unit models Models Method of Malfunction Detection Malfunction Decision Conditions Supposed Defect of outdoor unit PCB (A1P) Mismatching of the refrigerant type of indoor and outdoor unit. Causes Setting of outdoor PCB was not conducted after replacing to spare parts PCB.

  • Page 407: Refrigerant System Not Set, Incompatible Wiring/Piping

    Troubleshooting for Outdoor Unit Si18-525B 7.27 Refrigerant System not Set, Incompatible Wiring/Piping Remote Controller Display Applicable AII BP unit models Models AII outdoor unit models Method of Malfunction Detection Malfunction Decision Conditions Supposed Failure to execute wiring check operation Defect of BP unit PCB Causes Failure to open the stop valve Troubleshooting...

  • Page 408: Malfunction Of System, Refrigerant System Address Undefined

    Si18-525B Troubleshooting for Outdoor Unit 7.28 Malfunction of System, Refrigerant System Address Undefined Remote Controller Display Applicable AII indoor unit models All BP unit models Models AII outdoor unit models Method of Malfunction Detection Malfunction Decision Conditions Supposed Defect of indoor unit PCB Defect of BP unit PCB Causes Defect of outdoor unit PCB (A1P)

  • Page 409: Check

    Check Si18-525B 8. Check Check No. 08 Check on connector of fan motor (Power supply cable) (1) Turn off the power supply. Measure the resistance between phases of U,V,W at the motor side connectors (three-core wire) to check that the values are balanced and there is no short circuit, while connector or relay connector is disconnected.
  • Page 410 Si18-525B Check Check No. 11 Check for Fan Speed Pulse Input on Outdoor Unit PCB (1) Disconnect the connector X206A with the power supply OFF and Operation OFF. (2) Is the voltage between pins 4 and 3 of X206A about 15 VDC after turning the power supply (3) Is the voltage between pins 4 and 1 of X206A about 5 VDC? (4) Connect the connector X206A with the power supply OFF and Operation OFF.

  • Page 411: Thermistor Resistance / Temperature Characteristics

    Thermistor Resistance / Temperature Characteristics Si18-525B Thermistor Resistance / Temperature Characteristics Indoor unit For air suction For liquid pipe For gas pipe Outdoor unit For outdoor air For coil For suction pipe For Receiver gas pipe (k Ω ) T°C T°C 197.81 192.08...
  • Page 412 Si18-525B Thermistor Resistance / Temperature Characteristics Outdoor Unit Thermistors for Discharge Pipe (R3T) (k Ω )) T°C T°C T°C 640.44 624.65 72.32 70.96 13.35 13.15 609.31 594.43 69.64 68.34 12.95 12.76 579.96 565.78 67.06 65.82 12.57 12.38 552.00 538.63 64.60 63.41 12.20 12.01...

  • Page 413: 10.Pressure Sensor

    Pressure Sensor Si18-525B 10.Pressure Sensor = 1.38V-0.69 : Detected Pressure [High Side] MPa = 0.57V-0.28 : Detected Pressure [Low Side] MPa : High pressure (MPa) : Output Voltage [High Side] V Detected Pressure : Low pressure (MPa) : Output Voltage [Low Side] V V : Voltage (V) High Pressure (P Low Pressure (P...

  • Page 414: Part 9 Removal Procedure

    Si18-525B Part 9 Removal Procedure 1. Outdoor Unit..................402 1.1 Removal of Outer Panels ..............402 1.2 Removal of PCB...................409 1.3 Removal of Solenoid Valve, Four Way Valve and Motorized Valve..420 1.4 Removal of Thermistor Assembly ............421 1.5 Removal of Fan Motor................422 2.

  • Page 415: Outdoor Unit

    Outdoor Unit Si18-525B 1. Outdoor Unit Removal of Outer Panels Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Appearance. Top panel Front panel Pipe outlet port (Q0446) Rear protective net Outdoor air...
  • Page 416 Si18-525B Outdoor Unit Step Procedure Points 2. Removing the rear protective net. Hooks Undo the 3 top hooks Bend the rear protective net first. slightly for easy removal. (Q0448) Next, undo the 4 right- side hooks. (See the figure at bottom.) (Q0449) Remove the rear protective net.
  • Page 417 Outdoor Unit Si18-525B Step Procedure Points 3. Removing the top panel. Remove the 8 screws. (Q0451) Lift and remove the top panel. (Q0452) Removal Procedure...
  • Page 418 Si18-525B Outdoor Unit Step Procedure Points 4. Removing the front panel. Remove the screw. Pull the front panel toward yourself. Screw (Q0453) There are 6 hooks on the front panel. Slide the front panel downward to remove it. (Q0454) Removal Procedure...
  • Page 419 Outdoor Unit Si18-525B Step Procedure Points 5. Removing the pipe cover. Remove the screw. Pull the pipe cover toward yourself. Screw (Q0455) There are 3 hooks on the pipe cover. Slide the pipe cover upward to remove it. (Q0456) Removal Procedure...
  • Page 420 Si18-525B Outdoor Unit Step Procedure Points 6. Right side panel. Remove the 6 screws off the panel's front. Screws (Q0457) Remove the 3 screws off the panel's back and the 2 screws off the panel's side. Screws Screws (Q0458) Remove the right side panel.
  • Page 421 Outdoor Unit Si18-525B Step Procedure Points 7. Removing the outdoor air thermistor. Disconnect the outdoor air thermistor holder. Unhook the holder from inside of the right side panel for easy removal. (Q0461) The figure shows the state after disconnection. Outdoor air thermistor holder (Q0460) Removal Procedure...

  • Page 422: Removal Of Pcb

    Si18-525B Outdoor Unit Removal of Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Removing the control PCB. Detach the 2 top locking guard spacers. Locking guard spacers. Remove the drip proof cover.
  • Page 423 Outdoor Unit Si18-525B Step Procedure Points Disconnect the X2A Solenoid valve (Hot gas) connectors one by one. X3A Solenoid valve X25A X34A X37A X44A X45A (Receiver gas purge) X5A Solenoid valve X46A (4 way valve) X6A Crankcase heater X28A X22A Transformer X23A Transformer X26A X25A Connector for [X250A]...
  • Page 424 Si18-525B Outdoor Unit Step Procedure Points Open the mounting plate's right side toward yourself. Remove the 2 clamps from behind the mounting plate. Clamps (Q0526) Disconnect the Ground, Power terminals NA Ground connectors from the (white) / LA (red) / X1A (black) power filter PCB and The clamps are to be kept in cut off the clamps.
  • Page 425 Outdoor Unit Si18-525B Step Procedure Points 3. Removing the power filter PCB. Cut off the 2 top clamps and remove the drip Clamps proof cover. Power filter PCB Drip proof cover (Q0527) Cut off with nippers. The clamp is to be kept in stock. (Q0471) Tilt up the compressor's Using long nose pliers, pull out...
  • Page 426 Si18-525B Outdoor Unit Step Procedure Points Release the compressor lead out of the groove. (Q0474) Remove the 2 clamps. Cut off with nippers. (Q0475) Removal Procedure...
  • Page 427 Outdoor Unit Si18-525B Step Procedure Points Remove the screws of the reactor leads. Screws (Q0476) Remove the screw. Screw (Q0477) The power filter PCB is provided with 2 hooks. Slide the PCB to the right to unhook it. <Rear view> Hooks (Q0478) Removal Procedure...
  • Page 428 Si18-525B Outdoor Unit Step Procedure Points 4. Removing the electrical assembly. Remove the clamp. Cut off with nippers. The clamp is to be kept in stock. (Q0479) Lift the electrical assembly to unhook it. Hooks Electrical assembly Partition plate Hook holes (Q0480) Removal Procedure...
  • Page 429 Outdoor Unit Si18-525B Step Procedure Points (Q0481) Disconnect the fan pcs.: Red and white motor relay connector. (Q0482) Removal Procedure...
  • Page 430 Si18-525B Outdoor Unit Step Procedure Points Disconnect the HPS HPS connector: Red connector and the Electrical box connector: White electrical box connector from each other. Remove the clamp and Cut off with nippers. unbind the leads. The clamp is to be kept in stock. (Q0483) Remove the clamp Cut off with nippers.
  • Page 431 Outdoor Unit Si18-525B Step Procedure Points Disconnect the fan Connector X206A: Red motor electrical box Connector X207A: White relay connector. (Q0486) 5. Removing the inverter PCB. Separate the power There are two hooks. Slide the filter PCB mounting plate to unhook it. Hooks plate from the electrical assembly.
  • Page 432 Si18-525B Outdoor Unit Step Procedure Points Remove the screw and detach the inverter PCB. (Q0489) There are 2 hooks at the far side (condenser side). When reassembling, catch these hooks first. Hooks (Q0490) Removal Procedure...

  • Page 433: Removal Of Solenoid Valve, Four Way Valve And Motorized Valve

    Outdoor Unit Si18-525B Removal of Solenoid Valve, Four Way Valve Motorized Valve Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Removing the solenoid valve coil, motorized valve coil and four way valve coil.

  • Page 434: Removal Of Thermistor Assembly

    Si18-525B Outdoor Unit Removal of Thermistor Assembly Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Removing the thermistors. Remove the under cool thermistor. Remove the suction pipe thermistor.

  • Page 435: Removal Of Fan Motor

    Outdoor Unit Si18-525B Removal of Fan Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Removing the front cover. Remove the 7 screws. (Q0495) Slide up the front cover to unhook and detach it.
  • Page 436 Si18-525B Outdoor Unit Step Procedure Points 2. Removing the propeller fan. Remove the nut and detach the propeller fan. (Q0497) Disconnect the fan motor lead's relay connector. Relay connector (Q0498) Removal Procedure...
  • Page 437 Outdoor Unit Si18-525B Step Procedure Points Open the fan motor When reassembling, make sure lead fixture. the lead wires are fastened by the fixtures. (Q0499) Remove the 4 screws Remove the 2 bottom screws and take out the fan first. If the top two screws are motor.

  • Page 438: Bp Unit

    Si18-525B BP Unit 2. BP Unit Removal of Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Removing the PCB. Remove the 4 screws from the electrical box cover.
  • Page 439 BP Unit Si18-525B Step Procedure Points Disconnect the solenoid valve connector and the thermistor connector. (Q0504) Remove the screw off the wire harness band. (Q0505) Remove the screw off the grounding lug. (Q0506) Removal Procedure...
  • Page 440 Si18-525B BP Unit Step Procedure Points Disconnect the Faston terminal of the grounding cable. (Q0507) Remove the 2 screws and take out the PCB. (Q0508) Removal Procedure...

  • Page 441: Removal Of Solenoid Valve Coil

    BP Unit Si18-525B Removal of Solenoid Valve Coil Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Removing the PCB. Preparations Take the steps for removing the Remove the legged PCB.
  • Page 442 Si18-525B BP Unit Step Procedure Points Remove the sealing The sealing compound (1) is a Sealing compound (1) compound (1) of the servicing part. pipe insulation sleeves. (Q0512) (Q0513) Remove the putty. (Q0514) Cut off the clamp. The clamp is to be kept in stock. Clamp (Q0528) Removal Procedure...
  • Page 443 BP Unit Si18-525B Step Procedure Points The clamps are to be kept in stock. Clamps (Q0529) Removal Procedure...

  • Page 444: Part 10 Appendix

    Si18-525B Part 10 Appendix 1. Piping Diagrams..................432 1.1 Outdoor Units ..................432 1.2 BP Units ....................433 1.3 Indoor Units ..................434 2. Wiring Diagrams..................441 2.1 Outdoor Units ..................441 2.2 BP Units ....................444 2.3 Indoor Units ..................446 Appendix...

  • Page 445: Piping Diagrams

    Piping Diagrams Si18-525B Piping Diagrams Outdoor Units RMK(X)S112/140/160DVM, RMK(X)S112/140/160DV1A, RMXS112/140/160DVLT Four way valve Service port High pressure Pressure sensor Heat exchanger regulating valve Filter Filter High pressure switch Capillary Solenoid tube valve Compressor Low pressure sensor Check Check valve valve Filter Filter Electronic...

  • Page 446: Bp Units

    Si18-525B Piping Diagrams BP Units BPMKS967A2(B), BPMKD967A2 INDOOR UNIT GAS SIDE ROOM A REFRIGERANT FLOW THERMISTOR ( DGA ) ( 15.9CuT ) HEATING LOCAL PIPING COOLING GAS SIDE ROOM B THERMISTOR ( DGB ) ( 15.9CuT ) LOCAL PIPING ELECTRONIC EXPANSION VALVE ( BYPASS ) ELECTRONIC INDOOR UNIT...

  • Page 447: Indoor Units

    Piping Diagrams Si18-525B Indoor Units 1.3.1 Wall Mounted Type FTKS25/35DVM, FTKS20/25/35DVMA FTXS20/25/35DVMA, FTXS20/25/35DVMT INDOOR UNIT INDOOR UNIT MAFFLER ASSY HEAT EXCHANGER MAFFLER ASSY HEAT EXCHANGER 7.0CuT 7.0CuT 6.4CuT 6.4CuT THERMISTOR 6.4CuT THERMISTOR 6.4CuT ON HEAT EXCH. ON HEAT EXCH. 6.4CuT 6.4CuT CROSS FLOW FAN CROSS FLOW FAN...
  • Page 448 Si18-525B Piping Diagrams FTXS71BVMA8, FTXS71DVMT FTK50AZVMB, FTK60AZVMB, FTK71AZVMB INDOOR UNIT INDOOR UNIT (7. 9CuT) ( 7.9CuT ) HEAT EXCHANGER HEAT EXCHANGER THERMISTOR THERMISTOR ON HEAT EXCH. ON HEAT EXCH. CROSS FLOW FAN CROSS FLOW FAN FIELD PIPING FIELD PIPING (6. 4CuT) ( 6.4CuT ) FAN MOTOR FAN MOTOR...
  • Page 449 Piping Diagrams Si18-525B FTKD50FVM FTKD71FVM INDOOR UNIT INDOOR UNIT (7.9CuT) (7.9CuT) HEAT EXCHANGER HEAT EXCHANGER THERMISTOR THERMISTOR ON HEAT EXCH. ON HEAT EXCH. CROSS FLOW FAN CROSS FLOW FAN FIELD PIPING FIELD PIPING (6.4CuT) (9.5CuT) FAN MOTOR FAN MOTOR FIELD PIPING FIELD PIPING (12.7CuT) (12.7CuT)
  • Page 450 Si18-525B Piping Diagrams 1.3.2 Duct Connected Type FDKS25/35CVMB, CDKS50/60CVMB, CDK(X)S25/35/50/60CVMA, CDXS25/35/50/60DVMT INDOOR UNIT ( 6.4CuT ) HEAT EXCHANGER THERMISTOR ON HEAT FIELD PIPING EXCH. ( 6.4CuT ) SIROCCO FAN FAN MOTOR FIELD PIPING CuT ) CuT ) REFRIGERANT FLOW CDXS25CVMB CDXS50CVMB CDKS25CVMB CDKS50CVMB...
  • Page 451 Piping Diagrams Si18-525B 1.3.3 Floor / Ceiling Suspended Dual Type FLXS25/35BVMA FLXS50/60BVMA INDOOR UNIT INDOOR UNIT ( 9. 5CuT ) ( 6. 4CuT ) HEAT EXCHANGER HEAT EXCHANGER THERMISTOR ON HEAT FIELD PIPING THERMISTOR EXCH. FIELD PIPING ( 6. 4CuT ) SIROCCO FAN ON HEAT ( 6.
  • Page 452 Si18-525B Piping Diagrams 1.3.5 Ceiling Mounted Cassette Type FFQ25/35/50/60B7V1B Indoor heat exchanger MODEL FFQ25 • 35B7V1B FFQ50 • 60B7V1B 12.7 Field piping φ C1220T-O Outdoor unit Field piping φ C1220T-O Indoor unit C : 4D039335 FCQ35/50/60/71BVE Indoor heat exchanger φ Field piping C1220T-0 φ...
  • Page 453 Piping Diagrams Si18-525B 1.3.6 Ceiling Mounted Built-in Type FBQ60/71BV1, FBQ60/71BVL Indoor heat exchanger φ Field piping C1220T-0 φ Field piping C1220T-0 Outdoor unit Indoor unit MODEL FHQ35BUV1B FHQ35BVV1B FCQ35BVE FCQ35C7VEB FHQ50, 60BUV1B FHQ50, 60BVV1B FCQ50, 60BVE 12.7 FBQ60BV1 FBQ60BVL FCQ50, 60C7VEB FUQ71, 100, 125BUV1B FUQ71, 100, 125BVV1B FHQ71, 100, 125BUV1B...
  • Page 454 Si18-525B Wiring Diagrams Wiring Diagrams Outdoor Units RMKS112/140/160DVM, RMKS112/140/160DV1A POWER SUPPLY 220-240V~50Hz 220-230V~50/60Hz GRN/YLW X22A X23A X24A t° NOTE ) 4 X44A t° S1NPL X45A S1NPH E1HC X46A X26A t° t° t° t° P< X60A S1PH X34A X37A X28A C/H SELECTOR TO BP UNIT TO OUT/ D UNI T X25A...

  • Page 455: Wiring Diagrams

    Wiring Diagrams Si18-525B RMXS112/140/160DVM, RMXS112/140/160DV1A, RMXS112/140/160DVLT POWER SUPPLY 220-240V~50Hz 220~60Hz 220-230V~50/60Hz X22A X23A X24A t° NOTE ) 4 X44A t° S1NPL X45A S1NPH E1HC X46A X26A t° t° t° t° P< X60A S1PH X34A X37A X28A C/H SELECTOR TO BP UNIT TO OUT/ D UNI T X25A X205A...
  • Page 456 Si18-525B Wiring Diagrams RMKD112/140/160DVM POWER SUPPLY 220-230 ~ 50/60Hz GRN/YLW X22A X23A X24A t° NOTE)4 X44A t° S1NPL X45A S1NPH E1HC X46A X26A t° t° t° t° P< 1 2 3 4 S1PH X60A X28A X34A X37A TO BP UNIT TO OUT/D UNIT C/H SELECTOR X25A...
  • Page 457 Wiring Diagrams Si18-525B BP Units BPMKS967A2, BPMKD967A2 ( DLA ) ( DGA ) ( DLB ) ( DGB ) t° t° t° t° FIELD WIRING X22A ROOM B ( BLU ) X21A LEDA ROOM A INDOOR ( RED ) LED1 ROOM A TRANSMISSION LED2...

  • Page 458: Bp Units

    Si18-525B Wiring Diagrams BPMKS967A2B ( DLA ) ( DGA ) ( DLB ) ( DGB ) t° t° t° t° FIELD WIRING X22A ROOM B ( BLU ) X21A LEDA ROOM A INDOOR ( RED ) LED1 ROOM A LED2 TRANSMISSION X20A CIRCUIT...
  • Page 459 Wiring Diagrams Si18-525B Indoor Units 2.3.1 Wall Mounted Type FTKS25/35DVM, FTK(X)S20/25/35DVMA FIELD WIRING. PCB3 PCB1 RECTIFIER 3.15A LED1 OUTDOOR LED2 CAUTION LED3 TRANSMISSION NOTE THAT OPERATION WILL CIRCUIT RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN.

  • Page 460: Indoor Units

    Si18-525B Wiring Diagrams FTKS50BVMB, FTK(X)S50BVMA8, FTXS50DVMT FIELD WIRING. PCB3 PCB1 RECTIFIER 3.15A OUTDOOR t° CAUTION TRANSMISSION NOTE THAT OPERATION WILL CIRCUIT RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS PCB4 TURNED OFF AND THEN BACK ON AGAIN. LED1 LED2 LED3 : FRAME GROUND : FUSE H1~H3...
  • Page 461 Wiring Diagrams Si18-525B FTK50/60/71AZVMB, FTK50/60/71AVM FIELD WIRING. 2 → PCB3 PCB1 PCB2 S25 S24 outdoor 3.15A CAUTION NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TRANSMISSION TURNED OFF AND THEN BACK CIRCUIT ON AGAIN. : FRAME GROUND PCB4 : FUSE S201...
  • Page 462 Si18-525B Wiring Diagrams FTKD50/60/71FVM FIELD WIRING. PCB3 PCB1 RECTIFIER 3.15A OUTDOOR ° CAUTION TRANSMISSION NOTE THAT OPERATION WILL CIRCUIT RESTART AUTOMATICALLY IF PCB4 THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN. LED1 LED2 LED3 : FRAME GROUND : FUSE H1 ~ H3 : HARNESS...
  • Page 463 Wiring Diagrams Si18-525B 2.3.2 Duct Connected Type FDKS25/35CVMB, CDKS50/60CVMB, CDK(X)S25/35/50/60CVMA, CDKD25/35/50/60CVM, CDKD25/35EAVM PCB1 PCB2 V1TR outdoor 3.15A FIELD WIRING. TERMINAL FOR CAUTION CENTRALIZED CONTROL TRANSMISSION NOTE THAT OPERATION WILL CIRCUIT RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK SIGNAL ON AGAIN.
  • Page 464 Si18-525B Wiring Diagrams 2.3.3 Floor / Ceiling Suspended Dual Type FLXS25/35/50/60BVMA PCB3 PCB1 PCB2 3.15A → outdoor FIELD WIRING. / YLW PCB4 TRANSMISSION CIRCUIT CAUTION NOTE THAT OPERATION WILL SIGNAL RESTART AUTOMATICALLY IF RECEIVER THE MAIN POWER SUPPLY IS indoor TURNED OFF AND THEN BACK ON AGAIN.
  • Page 465 Wiring Diagrams Si18-525B 2.3.5 Ceiling Mounted Cassette Type FFQ25/35/50/60B7V1B : CONNECTER DISCRIMINATION COLOUR FOR COMPONENTS. : CONNECTER COLOUR FOR COMPONENTS. : CONNECTER COLOUR FOR PRINTED CIRCUIT BOARD. t˚ IN CASE OF SIMULTANEOUS t˚ t˚ OPERATION SYSTEM INDOOR UNIT INDOOR UNIT ( MASTER ) ( SLAVE ) NOTE ) 5...
  • Page 466 Si18-525B Wiring Diagrams FCQ35/50/60/71BVE :CONNECTER DISCRIMINATION COLOUR FOR COMPONENTS. :CONNECTER COLOUR FOR COMPONENTS. :CONNECTER COLOUR FOR PRINTED CIRCUIT BOARD. t° t° t° X19A X18A X17A NOTE ) 3 TO BP UNIT NOTE ) 5 X61A NOTE ) 5 X24A X10A X11A X24A NOTE ) 3...
  • Page 467 Wiring Diagrams Si18-525B 2.3.6 Ceiling Mounted Built-in Type FBQ60/71BV1, FBQ60/71BVL :CONNECTER DISCRIMINATION COLOUR FOR COMPONENTS. :CONNECTER COLOUR FOR COMPONENTS. :CONNECTER COLOUR FOR PRINTED CIRCUIT BOARD. t° t ° t ° WIRED REMOTE CONTROLLER INDOOR UNIT ( OPTIONAL PARTS ) X19A X18A X17A X61A...
  • Page 468 Si18-525B Wiring Diagrams 2.3.7 Ceiling Suspended Type FHQ35/50/60BUV1B9 :CONNECTER DISCRIMINATION COLOUR FOR COMPONENTS. :CONNECTER COLOUR FOR COMPONENTS. t° :CONNECTER COLOUR FOR PRINTED CIRCUIT BOARD. IN CASE OF SIMULTANEOUS t° t° OPERATION SYSTEM INDOOR UNIT INDOOR UNIT TO OUTDOOR X19A X18A X17A (MASTER) (SLAVE)
  • Page 469 Wiring Diagrams Si18-525B Appendix...

  • Page 470: Index

    Si18-525B Index power supply waveforms check..... 339, 365 thermistor resistance check ....338, 358 A1..............329, 340 check for fan motor connector (signal line) ..396 A3................341 check for fan speed pulse input on A5................330 outdoor unit PCB........... 397 A6..........332, 333, 344, 345 check on connector of fan motor A7................347 (power supply cable) ........
  • Page 471 Si18-525B C5 ..............351 field setting C7 ..............336 wired remote controller ........183 C9 ............335, 352 wireless remote controller......184 CJ ..............353 field setting from outdoor unit ....... 166 E1 ..............366 filter E2 ..............360 air purifying filter with photocatalytic E3 ..............367 deodorizing function......
  • Page 472 Si18-525B INTELLIGENT EYE sensor PCB....67, 69, 71 malfunction code indication by inverter compressor abnormal ......381 outdoor unit PCB........... 325 inverter current abnormal ........382 malfunction hysteresis.......... 191 inverter PCB (A2P)..........62 malfunction in other indoor unit or other BP unit .. 392 inverter POWERFUL operation......143 malfunction of capacity setting ......
  • Page 473 Si18-525B outdoor unit PCB layout ........165 S204 ............... 81 OUTDOOR UNIT QUIET operation ......240 S21 ........67, 69, 71, 73, 76, 78, 81 outer panels ............402 S23 ................. 81 S24 ............. 73, 78, 81 S25 ............. 73, 78, 81 P4................386 S26 ........
  • Page 474 Si18-525B thermistor resistance check ......338, 358 X26A ..............60, 92 thermostat control .........137, 148 X27A ............ 84, 87, 90, 92 TIMER operation ...........251 X28A ..............60 titanium apatite photocatalytic air-purifying filter ...144 X29A ..............92 transmission error X2A ............60, 84, 87 between indoor unit and remote controller ..354 X33A ............
  • Page 475 Si18-525B Index...

  • Page 476: Drawings & Flow Charts

    Si18-525B Drawings & Flow Charts wired remote controller ......... 183 wireless remote controller ......184 abnormal discharge pipe temperature ....372 field setting from outdoor unit actuation of high pressure switch ......367 mode changing procedure ......167 actuation of low pressure switch ......368 filter PCB (A3P) address setting .............188 RMKD models ..........
  • Page 477 Si18-525B malfunction of heat exchanger thermistor FTK71AVM ........... 436 (R2T) .............350 FTK71AZVMB ..........435 malfunction of heat exchanger thermistor FTKD25DVM ..........435 (R3T) .............351 FTKD35DVM ..........435 malfunction of high pressure sensor ....378 FTKD50FVM ..........436 malfunction of indoor unit fan motor .....345 FTKD60FVM ..........
  • Page 478 Si18-525B signal receiver PCB ....68, 70, 72, 75, 80, 83 RMKD112/140/160DVM ....... 443 signal receiver PCB (A2P) ........89 RMKS112/140/160DV1A ......441 signal receiver PCB (A3P) ........86 RMKS112/140/160DVM ....... 441 swing flap motor malfunction / lock ......347 RMXS112/140/160DV1A ......442 RMXS112/140/160DVLT ......442 RMXS112/140/160DVM .......
  • Page 479 Specifications, designs and other content appearing in this brochure are current as of March 2007 but subject to change without notice. Si 18-525B Printed in Japan 03/2007 B AK...

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