Daikin B-Series Service Manual
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Daikin B-Series Service Manual

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Si12- 714
B-Series / D-Series
[Applied Models]
Inverter Multi : Cooling Only
Inverter Multi : Heat Pump

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Summary of Contents for Daikin B-Series

  • Page 1 Si12- 714 B-Series / D-Series [Applied Models] Inverter Multi : Cooling Only Inverter Multi : Heat Pump...
  • Page 2 Si12-714 SUPER MULTI NX B-Series D-Series Cooling Only Indoor Unit FTKD25DVM FTKD50FVM CDKD25CVM FLK25AVMA FTKD35DVM FTKD60FVM CDKD35CVM FLK35AVMA FTKE25BVM FTKD71FVM CDKD50CVM FLK50AVMA8 FTKE35BVM CDKD60CVM FLK60AVMA8 FTKE25BVMA8 CDKD25CVMA FWKG25AVM FTKE35BVMA8 CDKD35CVMA FWKG35AVM CDKD50CVMA CDKD60CVMA CDKD25EAVM CDKD35EAVM CDKD25EAVMA CDKD35EAVMA Outdoor Unit 2MKD58DVM...

  • Page 3: Table Of Contents

    Si12-714 1. Introduction .................... vi 1.1 Safety Cautions ..................vi 1.2 Used Icons ....................x Part 1 List of Functions ..............1 1. List of Functions ..................2 1.1 Cooling Only.....................2 1.2 Heat Pump ....................9 Part 2 Specifications ..............13 1. Specifications ..................14 1.1 Indoor Units - Cooling Only ..............14 1.2 Outdoor Units - Cooling Only ..............22 1.3 Indoor Units - Heat Pump...............28...
  • Page 4 Si12-714 3.7 Heating Peak-cut Control ...............82 3.8 Fan Control.....................83 3.9 Liquid Compression Protection Function 2..........83 3.10 Defrost Control ..................84 3.11 Low Hz High Pressure Limit ..............85 3.12 Electronic Expansion Valve Control ............85 3.13 Malfunctions ...................89 3.14 Forced Operation Mode .................90 3.15 Wiring-Error Check.................91 3.16 Additional Function.................93 Part 5 Operation Manual .............
  • Page 5 Si12-714 5.11 Compressor Lock .................192 5.12 DC Fan Lock ..................193 5.13 Input Over Current Detection ...............194 5.14 Four Way Valve Abnormality..............196 5.15 Discharge Pipe Temperature Control...........198 5.16 High Pressure Control in Cooling ............199 5.17 Position Sensor Abnormality ..............201 5.18 CT or Related Abnormality ..............202 5.19 Thermistor or Related Abnormality (Outdoor Unit).......204 5.20 Electrical Box Temperature Rise............206 5.21 Radiation Fin Temperature Rise ............208...
  • Page 6 Si12-714 Part 8 Others ................311 1. Others ....................312 1.1 Test Run from the Remote Controller ..........312 1.2 Jumper Settings ...................313 1.3 Application of Silicon Grease to a Power Transistor and a Diode Bridge..................315 Part 9 Appendix................. 317 1. Piping Diagrams..................318 1.1 Indoor Units ..................318 1.2 Outdoor Units ..................324 2.

  • Page 7: Introduction

    Introduction Si12-714 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 8 Si12-714 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 9 Introduction Si12-714 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 10 Si12-714 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 11: Used Icons

    Introduction Si12-714 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 12: Part 1 List Of Functions

    Si12-714 Part 1 List of Functions 1. List of Functions ..................2 1.1 Cooling Only.....................2 1.2 Heat Pump ....................9 List of Functions...

  • Page 13: List Of Functions

    List of Functions Si12-714 1. List of Functions Cooling Only 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 14 Si12-714 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 15 List of Functions Si12-714 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 16 Si12-714 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 17 List of Functions Si12-714 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 — Air Purifying Filter with Photocatalytic PAM Control —...
  • Page 18 Si12-714 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 19 List of Functions Si12-714 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 20: Heat Pump

    Si12-714 List of Functions Heat Pump 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 21 List of Functions Si12-714 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 22 Si12-714 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 23 List of Functions Si12-714 Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter — Function Clean –10 Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — –15 Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...

  • Page 24: Part 2 Specifications

    Si12-714 Part 2 Specifications 1. Specifications ..................14 1.1 Indoor Units - Cooling Only ..............14 1.2 Outdoor Units - Cooling Only ..............22 1.3 Indoor Units - Heat Pump...............28 1.4 Outdoor Units - Heat Pump ..............33 Specifications...

  • Page 25: Specifications

    Specifications Si12-714 1. Specifications Indoor Units - Cooling Only Wall Mounted Type 50Hz 220-230-240V / 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)
  • Page 26 Si12-714 Specifications 50Hz 220-230-240V / 60Hz 220-230V Model FTKE25BVMA8 FTKE35BVMA8 Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color White White 7.8 (275) 7.7 (272) 6.4 (226) 6.3 (222) m³/min Air Flow Rates (cfm) 5.0 (177) 4.9 (173) 4.3 (152) 4.4 (155) Type Cross Flow Fan...
  • Page 27 Specifications Si12-714 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 28 Si12-714 Specifications Duct Connected Type 50Hz 220-230-240V / 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...
  • Page 29 Specifications Si12-714 50Hz 220-230-240V / 60Hz 220-230V Model CDKD25CVMA CDKD35CVMA 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 30 Si12-714 Specifications 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 31 Specifications Si12-714 Floor / Ceiling Suspended Dual Type 50Hz 220-230-240V / 60Hz 220-230V Model FLK25AVMA FLK35AVMA Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color Almond White Almond White 7.6 (268) 8.7 (307) 6.8 (240) 7.7 (272) m³/min Air Flow Rates (cfm) 6.0 (212) 6.6 (233)
  • Page 32 Si12-714 Specifications Wall Built-in Type 50Hz 230V MODEL FWKG25AVM FWKG35AVM Rated Capacity 2.5kW class 3.5kW class Front Panel Color — — 7.8 (275) 7.7 (272) 6.4 (226) 6.3 (222) Air Flow Rate m³/min (cfm) 5.0 (177) 4.9 (173) 4.3 (152) 4.4 (155) Type Cross Flow Fan...

  • Page 33: Outdoor Units - Cooling Only

    Specifications Si12-714 Outdoor Units - Cooling Only 50Hz 220-230-240V / 60Hz 220-230V Model 2MKD58DVM 3MKD58DVM — — Cooling Capacity — — Power Consumption — — Running Current Casing Color Ivory White Ivory White Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Compressor Model 2YC32WXD...
  • Page 34 Si12-714 Specifications 50Hz 220-230-240V / 60Hz 220-230V Model 3MKD75DVM 4MKD75DVM — — Cooling Capacity — — Power Consumption — — Running Current Casing Color Ivory White Ivory White Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Compressor Model 2YC45ZXD 2YC45ZXD Motor Output 1,380...
  • Page 35 Specifications Si12-714 50Hz 220-230-240V / 60Hz 220-230V Model 4MKD100DVM — Cooling Capacity — Power Consumption — Running Current Casing Color Ivory White Type Hermetically Sealed Swing Type Compressor Model 2YC63YXD#D Motor Output 1,920 Model SE56P Refrigerant Oil Charge 0.75 Type R-22 Refrigerant Charge...
  • Page 36 Si12-714 Specifications 50Hz 220-230-240V / 60Hz 220-230V Model 3MKD75BVMA8 — Cooling Capacity — Power Consumption — Running Current Casing Color Ivory White Type Hermetically Sealed Swing Type Compressor Model 2YC45ZXD Motor Output 1,380 Model SUNISO 4GSD.I. Refrigerant Oil Charge 0.75 Type R-22 Refrigerant...
  • Page 37 Specifications Si12-714 50Hz 220-230-240V / 60Hz 220-230V Model 4MKD90BVM — Cooling Capacity — Power Consumption — Running Current Casing Color Pale Ivory Type Hermetically Sealed Swing Type Compressor Model 2YC45ZXD Motor Output 1,380 Model SUNISO 4GSD.I. Refrigerant Oil Charge 0.75 Type R-22 Refrigerant...
  • Page 38 Si12-714 Specifications 50Hz 220-230-240V / 60Hz 220-230V Model 4MKD90BVMA — Cooling Capacity — Power Consumption — Running Current Casing Color Pale Ivory Type Hermetically Sealed Swing Type Compressor Model 2YC45ZXD Motor Output 1,380 Model SUNISO 4GSD.I. Refrigerant Oil Charge 0.75 Type R-22 Refrigerant...

  • Page 39: Indoor Units - Heat Pump

    Specifications Si12-714 Indoor Units - Heat Pump Wall Mounted Type 50Hz 220-230-240V / 60Hz 220-230V FTXE25BVMA8 FTXE35BVMA8 Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color White White 7.8 (275) 8.1 (286) 7.7 (272) 8.1 (286) 6.4 (226) 6.6 (233) 6.3 (222)
  • Page 40 Si12-714 Specifications 50Hz 220-230-240V / 60Hz 220-230V FTXD71FVM Model Cooling Heating Rated Capacity 7.1kW Class Front Panel Color White 18.3 (646) 19.8 (699) 15.3 (540) 17.1 (604) m³/min Air Flow Rates (cfm) 12.7 (448) 14.4 (508) 11.3 (399) 12.6 (445) Type Cross Flow Fan Motor Output...
  • Page 41 Specifications Si12-714 Duct Connected Type 50Hz 220-230-240V / 60Hz 220-230V CDXD25CVMA CDXD35CVMA 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 (331) 8.8 (311) 9.3 (328) 9.3 (328) m³/min...
  • Page 42 Si12-714 Specifications 50Hz 220-230-240V / 60Hz 220-230V CDXD25EAVMA CDXD35EAVMA Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class — — Front Panel Color 8.7 (307) 8.7 (307) 8.7 (307) 8.7 (307) 8.0 (282) 8.0 (282) 8.0 (282) 8.0 (282) m³/min Air Flow Rates (cfm)
  • Page 43 Specifications Si12-714 Floor / Ceiling Suspended Dual Type 50Hz 220-230-240V / 60Hz 220-230V FLX25AVMA FLX35AVMA 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) 8.7 (307) 10.0 (353) 6.8 (240) 8.3 (293) 7.7 (272)

  • Page 44: Outdoor Units - Heat Pump

    Si12-714 Specifications Outdoor Units - Heat Pump 50Hz 220-230-240V / 60Hz 220-230V 3MXD68BVMA8 4MXD80BVMA Model Cooling Heating Cooling Heating — — Cooling Capacity — — Power Consumption — — Running Current Casing Color Ivory White Pale Ivory Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Compressor Model...
  • Page 45 Specifications Si12-714 Specifications...

  • Page 46: Part 3 Printed Circuit Board Connector Wiring Diagram

    Si12-714 Part 3 Printed Circuit Board Connector Wiring Diagram 1. Printed Circuit Board Connector Wiring Diagram........36 1.1 Wall Mounted Type ................36 1.2 Duct Connected Type................42 1.3 Floor / Ceiling Suspended Dual Type.............44 1.4 Wall Built-in Type ...................47 1.5 Outdoor Units ..................49 Printed Circuit Board Connector Wiring Diagram...

  • Page 47: Printed Circuit Board Connector Wiring Diagram

    Printed Circuit Board Connector Wiring Diagram Si12-714 1. Printed Circuit Board Connector Wiring Diagram Wall Mounted Type 1.1.1 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)
  • Page 48 Si12-714 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB(1): Control PCB (indoor unit) 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 49 Printed Circuit Board Connector Wiring Diagram Si12-714 1.1.2 FTK(X)E 25/35 B Connectors PCB(1) (Control PCB) Connector for AC fan motor Connector for swing motor (Horizontal Flap) Connector for AC fan motor Connector for centralized control to 5 rooms Connector for signal receiver PCB Connector for heat exchanger thermistor Connector for INTELLIGENT EYE Sensor PCB PCB(2) (Signal Receiver PCB)
  • Page 50 Si12-714 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB(1): Control PCB (indoor unit) PCB(2): Signal Receiver PCB PCB(3): INTELLIGENT EYE Sensor PCB Printed Circuit Board Connector Wiring Diagram...
  • Page 51 Printed Circuit Board Connector Wiring Diagram Si12-714 1.1.3 FTK(X)D 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 Connector for signal receiver PCB Connector for heat exchanger thermistor Connector for Intelligent Eye sensor PCB...
  • Page 52 Si12-714 Printed Circuit Board Connector Wiring Diagram 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 53: Duct Connected Type

    Printed Circuit Board Connector Wiring Diagram Si12-714 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) Connector for control PCB Note:...
  • Page 54 Si12-714 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB (2): Display PCB Printed Circuit Board Connector Wiring Diagram...

  • Page 55: Floor / Ceiling Suspended Dual Type

    Printed Circuit Board Connector Wiring Diagram Si12-714 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) (Power Supply PCB)
  • Page 56 Si12-714 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB (1): Control PCB (indoor unit) PCB Detail PCB (2): Power Supply PCB Printed Circuit Board Connector Wiring Diagram...
  • Page 57 Printed Circuit Board Connector Wiring Diagram Si12-714 PCB (3): Display PCB PCB (4): Signal Receiver PCB EX511 REV 12 PHOTO 2P084377- 1 S31(RTH) (R6057) Printed Circuit Board Connector Wiring Diagram...

  • Page 58: Wall Built-In Type

    Si12-714 Printed Circuit Board Connector Wiring Diagram Wall Built-in Type Connectors PCB(1) (Control PCB) Connector for AC fan motor Connector for swing motor (Horizontal Flap) Connector for AC fan motor Connector for centralized control to 5 rooms Connector for signal receiver PCB Connector for heat exchanger thermistor PCB(2) (Signal Receiver PCB) Connector for control PCB...
  • Page 59 Printed Circuit Board Connector Wiring Diagram Si12-714 PCB Detail PCB (1): Control PCB (indoor unit) PCB (2): Signal Receiver PCB Printed Circuit Board Connector Wiring Diagram...

  • Page 60: Outdoor Units

    Si12-714 Printed Circuit Board Connector Wiring Diagram Outdoor Units Connectors Control PCB Connector for S11 on MID1 Connector for electronic expansion valve coil A port Connector for electronic expansion valve coil B port Connector for electronic expansion valve coil C port Connector for electronic expansion valve coil D port Connector for CN14 on SPM Connector for CN11 on SPM...
  • Page 61 Printed Circuit Board Connector Wiring Diagram Si12-714 MID1 Varistor Fuse (30A) Inverter PCB (MID2) FU201 Fuse (3.15A) PCB Detail 2MKD58DVM, 3MKD58/75DVM, 4MKD75DVM Control PCB (outdoor unit) S101 S20 S40 (R6044) Service Monitor PCB LED4 LED2 LED A LED3 LED1 S102 (R6045) Printed Circuit Board Connector Wiring Diagram...
  • Page 62 Si12-714 Printed Circuit Board Connector Wiring Diagram PCB Detail 3MKD75BVMA8, 4MKD90BVM, 4MKD90BVMA, 3MXD68BVMA8, 4MXD80BVMA Control PCB (outdoor unit) S101 S20 S40 (R6046) Service Monitor PCB LED4 LED2 LED A LED3 LED1 S102 (R6047) Printed Circuit Board Connector Wiring Diagram...
  • Page 63 Printed Circuit Board Connector Wiring Diagram Si12-714 PCB Detail 4MKD100DVM Control PCB (outdoor unit) S101 S20 S40 (R4901) Service Monitor PCB LED4 LED2 LED A LED3 LED1 S102 (R4911) Printed Circuit Board Connector Wiring Diagram...
  • Page 64 Si12-714 Printed Circuit Board Connector Wiring Diagram PCB Detail MID1 (All Outdoor Units) (R4019) Inverter PCB (MID2) FU201 (3.15A) (R4020) CN14 CN11 (R4021) Printed Circuit Board Connector Wiring Diagram...
  • Page 65 Printed Circuit Board Connector Wiring Diagram Si12-714 Printed Circuit Board Connector Wiring Diagram...

  • Page 66: Part 4 Function And Control

    Si12-714 Part 4 Function and Control 1. Main Functions..................56 1.1 Frequency Principle................56 1.2 Power-Airflow Dual Flaps, Wide Angle Louvers and Auto-Swing ..58 1.3 Fan Speed Control for Indoor Units............59 1.4 Programme Dry Function ...............60 1.5 Automatic Operation................61 1.6 Thermostat Control.................62 1.7 Night Set Mode..................63 1.8 ECONO Mode ..................64 1.9 MOLD PROOF Operation ..............64...

  • Page 67: Main Functions

    Main Functions Si12-714 1. Main Functions Note: See the list of functions for the functions applicable to different models. Frequency Principle Main Control The compressor is frequency-controlled during normal operation. The target frequency is set by the following 2 parameters coming from the operating indoor unit: Parameters The load condition of the operating indoor unit The difference between the room temperature and the set temperature...
  • Page 68 Si12-714 Main Functions Inverter Features The inverter provides the following features: The regulating capacity can be changed according to the changes in the outdoor air temperature and cooling / heating load. Quick heating and quick cooling The compressor rotational speed is increased when starting the heating (or cooling). This enables a quick set temperature.

  • Page 69: Power-Airflow Dual Flaps, Wide Angle Louvers And Auto-Swing

    Main Functions Si12-714 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 70: Fan Speed Control For Indoor Units

    Si12-714 Main Functions 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 rotation speed control, or phase Hall IC control.

  • Page 71: Programme Dry Function

    Main Functions Si12-714 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 72: Automatic Operation

    Si12-714 Main Functions 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 73: Thermostat Control

    Main Functions Si12-714 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 74: Night Set Mode

    Si12-714 Main Functions 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 75: Econo Mode

    Main Functions Si12-714 ECONO Mode Outline 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 76: Intelligent Eye

    Si12-714 Main Functions 1.10 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 77 Main Functions Si12-714 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 78: Home Leave Operation

    Si12-714 Main Functions 1.11 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 79: Inverter Powerful Operation

    Main Functions Si12-714 1.12 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 80: Other Functions

    Si12-714 Main Functions 1.13 Other Functions 1.13.1 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 81 Main Functions Si12-714 1.13.6 Air-Purifying Filter For FTKD25/35D, FTK(X)E25/35B, FLK(X)25-60A A double structure made up of a bacteriostatic filter and an Air-Purifying Filter traps dust, mildew, mites, tobacco smoke, and allergy-causing pollen. Replace the Air-Purifying Filter once every 3 months. 1.13.7 Air Purifying Filter with Photocatalytic Deodorizing Function For FWKG25/35A This filter incorporates the benefits the Air Purifying Filter and Photocatalytic Deodorizing Filter...

  • Page 82: Function Of Main Structural Parts

    Si12-714 Function of Main Structural Parts 2. Function of Main Structural Parts Main Structural Parts Heat Pump Model Expansion valve Solenoid valve Four way valve (R4595) Compressor Cooling Only Model Expansion valve Compressor (R4596) Note: Expansion Valve : In Case of 2MK(X)..EVA-B, 3MK(X)..EVA-C, 4MK(X)..EVA-D Function and Control...

  • Page 83: Function Of Thermistor

    Function of Main Structural Parts Si12-714 Function of Thermistor 2.2.1 Heat Pump Model Expansion valve Solenoid valve Four way valve Compressor (R4600) A Outdoor Heat 1. The outdoor heat exchanger thermistor is used for controlling target discharge temperature. The system sets a target discharge temperature according to the outdoor and indoor heat Exchanger exchanger temperature, and controls the electronic expansion valve opening so that the Thermistor...
  • Page 84 Si12-714 Function of Main Structural Parts D Indoor Heat 1. The indoor heat exchanger thermistors are used for controlling target discharge temperature. Exchanger The system sets a target discharge pipe temperature according to the outdoor and indoor Thermistor heat exchanger temperature, and controls the electronic expansion valve opening so that the target discharge temperature can be obtained.

  • Page 85: Cooling Only Model

    Function of Main Structural Parts Si12-714 2.2.2 Cooling Only Model Expansion valve Compressor (R4601) A Outdoor Heat 1. The outdoor heat exchanger thermistor is used for controlling target discharge temperature. Exchanger The system sets a target discharge temperature according to the outdoor and indoor heat exchanger temperature, and controls the electronic expansion valve opening so that the Thermistor target discharge temperature can be obtained.
  • Page 86 Si12-714 Function of Main Structural Parts D Indoor Heat 1. The indoor heat exchanger thermistors are used for controlling target discharge temperature. Exchanger The system sets a target discharge pipe temperature according to the outdoor and indoor Thermistor heat exchanger temperature, and controls the electronic expansion valve opening so that the target discharge temperature can be obtained.

  • Page 87: Control Specification

    Control Specification Si12-714 3. Control Specification Mode Hierarchy Outline There are two modes; the mode selected in user’s place (normal air conditioning mode) and forced operation mode for installation and providing service. Detail 1. For heat pump model There are following modes; stop, cooling (includes drying), heating (include defrosting) Air conditioner control mode Forced operating mode Forced cooling...

  • Page 88: Frequency Control

    Si12-714 Control Specification Frequency Control Outline Frequency that corresponds to each room’s capacity will be determined according to the difference in the temperature of each room and the temperature that is set by the remote controller. The function is explained as follows. 1.
  • Page 89 Control Specification Si12-714 2. Determine upper limit frequency Set a minimum value as an upper limit frequency among the frequency upper limits of the following functions: Compressor protection, input current, discharge pipes, freeze-up protection, dew prevention, fin thermistor temperature. 3. Determine lower limit frequency Set a maximum value as an lower limit frequency among the frequency lower limits of the following functions: Pressure difference upkeep.
  • Page 90 Si12-714 Control Specification 4. Frequency management when other controls are functioning When each frequency is drooping; Frequency management is carried out only when the frequency droops. For limiting lower limit Frequency management is carried out only when the frequency rises. 5.

  • Page 91: Controls At Mode Changing / Start-Up

    Control Specification Si12-714 Controls at Mode Changing / Start-up 3.3.1 Preheating Operation Outline Operate the inverter in the open phase operation with the conditions including the preheating command from the indoor, the outdoor air temperature and discharge pipe temperature. Detail Preheating ON Condition When outdoor air temperature is below 10.5°C and discharge pipe temperature is below 10.5°C, inverter in open phase operation starts.

  • Page 92: Discharge Pipe Temperature Control

    Si12-714 Control Specification Discharge Pipe Temperature Control Outline The discharge pipe temperature is used as the compressor's internal temperature. If the discharge pipe temperature rises above a certain level, the operating frequency upper limit is set to keep this temperature from going up further. Detail Zones (typical value) Management within the Zone...

  • Page 93: Freeze-Up Protection Control

    Control Specification Si12-714 Freeze-up Protection Control Outline During cooling operation, the signals being sent from the indoor unit allow the operating frequency limitation and then prevent freezing of the indoor heat exchanger. (The signal from the indoor unit must be divided into the zones as the followings. Detail Conditions for Start Controlling Judge the controlling start with the indoor heat exchanger temperature after 2 sec from...

  • Page 94: Fan Control

    Si12-714 Control Specification Fan Control Outline Fan control is carried out with following condition. 1. Fan ON control for electric component cooling fan 2. Fan control when defrosting 3. Fan OFF delay when stopped 4. ON/OFF control when cooling operation 5.

  • Page 95: Defrost Control

    Control Specification Si12-714 3.10 Defrost Control Outline Heat Pump Only Defrosting is carried out by the cooling cycle (reverse cycle). The defrosting time or outdoor heat exchanger temperature must be more than its fixed value when finishing. Detail Conditions for Starting Defrost The starting conditions must be made with the outdoor air temperature and heat exchanger temperature.

  • Page 96: Low Hz High Pressure Limit

    Si12-714 Control Specification 3.11 Low Hz High Pressure Limit Outline Heat Pump Only Set the upper limit of high pressure in a low Hz zone. Set the upper limit of the indoor heat exchanger temperature by its operating frequency of Hz. Separate into three zones, reset zone, keep zone and drooping zone and the frequency control must be carried out in such zones.
  • Page 97 Control Specification Si12-714 Detail The followings are the examples of control which function in each mode by the electronic expansion valve control. Operation pattern : function × : not function When power is turned ON × × × × × ×...
  • Page 98 Si12-714 Control Specification 3.12.1 Fully Closing with Power ON Initialize the electronic expansion valve when turning on the power, set the opening position and develop pressure equalizing. 3.12.2 Pressure Equalization Control When the compressor is stopped, open and close the electronic expansion valve and develop pressure equalization.
  • Page 99 Control Specification Si12-714 3.12.7 Disconnection of the Discharge Pipe Thermistor Outline Detect a disconnected discharge pipe thermistor by comparing the discharge pipe temperature with the condensation temperature. If any is disconnected, open the electronic expansion valve according to the outdoor air temperature and the operating frequency and operate for a specified time, and then stop.

  • Page 100: Malfunctions

    Si12-714 Control Specification 3.13 Malfunctions 3.13.1 Sensor Malfunction Detection Sensor malfunction may occur either in the thermistor or current transformer (CT) system. Relating to Thermistor Malfunction 1. Outdoor heat exchanger thermistor 2. Discharge pipe thermistor 3. Fin thermistor 4. Gas pipe thermistor 5.

  • Page 101: Forced Operation Mode

    Control Specification Si12-714 Detail Judgment by Input Current When an output frequency is exceeds 55 Hz and the input current is less than specified value, the adjustment is made for insufficient gas. Judgment by Discharge Pipe Temperature When discharge pipe temperature is 20°C higher than target value and the electronic expansion value opening is 450 plus (max.), the adjustment is made for insufficient gas.

  • Page 102: Wiring-Error Check

    Si12-714 Control Specification 3.15 Wiring-Error Check Outline The convenient Wiring Error Check function is designed for the microcomputer to correct wiring errors itself. If local wiring is unclear in the case of buried piping, for example, just press the wiring error check switch that is behind the right-hand panel of the outdoor unit.
  • Page 103 Control Specification Si12-714 Checking the Those data can be checked by looking at the service monitor LED indicators, when the wiring error checking is over, during forced operation, at the stop of the system. current setting The LED indicators stop flashing when the forced operation is over. data on the LED1…Room A wiring, LED2…Room B wiring microcomputer...

  • Page 104: Additional Function

    Si12-714 Control Specification 3.16 Additional Function 3.16.1 Connection Pipe Condensation Preventing Function This control is intended to adjust the electronic expansion valve opening so that the outdoor unit gas pipe temperature (GDN) be kept below 8°C. 3.16.2 Priority Room Setting Electronic expansion valves are controlled to provide the unit designated as the priority room with the capacity of other room units.
  • Page 105 Control Specification Si12-714 3.16.5 Cooling / Heating Mode Lock Use the S15 connector to set the unit to only cool or heat. Setting to only heat (H): Short-circuit pins 1 and 3 of the connector <S15>. Setting to only cool (C): short-circuit pins 3 and 5 of the connector <S15>. The following specifications apply to the connector housing and pins.

  • Page 106: Part 5 Operation Manual

    Si12-714 Part 5 Operation Manual 1. System Configuration................96 1.1 Operation Instructions ................96 2. Instruction....................97 2.1 Contents and Reference Page ...............97 2.2 Safety Precautions .................98 2.3 Names of Parts..................100 2.4 Preparation Before Operation ..............118 2.5 AUTO · DRY · COOL · HEAT · FAN Operation ........121 2.6 Adjusting the Air Flow Direction ............123 2.7 POWERFUL Operation ................133 2.8 OUTDOOR UNIT QUIET Operation.............134...

  • Page 107: System Configuration

    System Configuration Si12-714 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 108: Instruction

    Si12-714 Instruction Instruction Contents and Reference Page Wall Mounted Type Model Series FTKD25/35D FTK(X)E25/35B FTK(X)D50/60/71F 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 109: Safety Precautions

    • 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 110: Installation Site

    Si12-714 Instruction • 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 111: Names Of Parts

    Instruction Si12-714 Names of Parts FTKD 25/35 D Names of parts Indoor Unit ON/OFF Operation Manual...
  • Page 112 Si12-714 Instruction Outdoor Unit Indoor Unit 1. Air filter 12. Indoor Unit ON/OFF switch: • Push this switch once to start operation. 2. Photocatalytic deodorizing filter Push once again to stop it. or Air-Purifying filter: • The operation mode refers to the following •...
  • Page 113 Instruction Si12-714 Remote Controller ECONO ON/OFF TEMP POWERFUL MODE SWING QUIET MOLD PROOF SENSOR CANCEL TIMER < > ARC433B47 1. Signal transmitter: 8. QUIET button: OUTDOOR UNIT QUIET operation. • It sends signals to the indoor unit. 2. Display: 9. FAN setting button: •...
  • Page 114 Si12-714 Instruction FTK(X)D 50/60/71 F Names of parts Indoor Unit Operation Manual...
  • Page 115 Instruction Si12-714 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 116 Si12-714 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 117 Instruction Si12-714 FTK(X)E 25/35 B Names of parts ■ Indoor Unit Operation Manual...
  • Page 118 Si12-714 Instruction ■ Outdoor Unit ■ ■ ■ ■ Indoor Unit 1. Air filter 12. 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: •...
  • Page 119 Instruction Si12-714 Remote Controller HOME LEAVE ON/OFF TEMP POWERFUL MODE SWING QUIET SENSOR < > ARC433B1, B2 1. Signal transmitter: 8. QUIET button: for OUTDOOR UNIT QUIET • It sends signals to the indoor unit. operation • Only works for multi-connection 2.
  • Page 120 Si12-714 Instruction CDK(X)D 25/35/50/60 C, CDK(X)D 25/35 E Names of parts Indoor Unit Operation Manual...
  • Page 121 Instruction Si12-714 ■ 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 122 Si12-714 Instruction Remote Controller < ARC433B69, B76 > 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 123 Instruction Si12-714 FLK(X) 25/35/50/60 A Names of parts ■ Indoor Unit The indoor unit can be installed either to the ceiling or to a wall. The descriptions contained in this manual 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.) CAUTION •...
  • Page 124 Si12-714 Instruction Outdoor Unit Indoor Unit 1. Louvres (vertical blades) 13. Indoor unit ON/OFF switch The louvres are inside of the air outlet. 2 Push this switch once to start operation. 2. Air outlet Push once again to stop it. 2 Push the switch using an object with a sharp 3.
  • Page 125 Instruction Si12-714 Remote Controller HOME LEAVE ON/OFF TEMP POWERFUL MODE SWING QUIET < > ARC433B67, B68 1. Signal Transmitter: 7. MODE selector button: • It selects the operation mode. • It sends signals to the indoor unit. (AUTO/DRY/COOL/HEAT/FAN) 2. Display: 8.
  • Page 126 Si12-714 Instruction FWKG 25/35 A Names of parts Indoor Unit Air filter Air Purifying Filter with Photocatalytic Deodori- zing Function Air inlet They will be attached in the reverse-side of the air filter. Front grille Louvers Air outlet (vertical blades) It is inside this part.
  • Page 127 Instruction Si12-714 Remove the front grille CAUTION Don't touch the metal parts of the indoor unit. If you touch those parts, this may cause an injury. Indoor temperature sensor part. For detecting the room temperature. Display and Operation part Timer lamp Receiving (yellow) part...
  • Page 128 Si12-714 Instruction Names of parts Remote controller HOME LEAV ON/OFF TEMP POWERFUL MODE SILENT CANCEL TIMER < > ARC433A8 1. Signal transmitter: 7. MODE selector button: It sends signals to the indoor unit. It selects the operation mode. (DRY/COOL/FAN) 2. Display: It displays the current settings.

  • Page 129: Preparation Before Operation

    Instruction Si12-714 Preparation Before Operation Preparation Before Operation ■ To set the batteries Position + and – correctly! 1. Press with a finger and slide the front cover to take it off. 2. Set two dry batteries (AAA). 3. Set the front cover as before. ATTENTION ■...
  • Page 130 Si12-714 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 control- ler, such as a curtain, the unit will not operate. •...
  • Page 131 Instruction Si12-714 To set the clock 1. Press “CLOCK button”. is displayed. blinks. 2. Press “TIMER setting button” to set the clock to the present time. HOME LEAVE ON/OFF Holding down “ ” or “ ” button rap- TEMP POWERFUL idly increases or decreases the time dis- play.

  • Page 132: Auto · Dry · Cool · Heat · Fan Operation

    Si12-714 Instruction 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 133 Instruction Si12-714 ■ To change the air flow rate setting 5. Press “FAN setting button”. DRY mode AUTO or COOL or HEAT or FAN mode Five levels of air flow rate setting from “ ” to “ ” plus “ ”...

  • Page 134: Adjusting The Air Flow Direction

    Si12-714 Instruction Adjusting the Air Flow Direction 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”. is displayed on the LCD and the flaps will begin to swing.
  • Page 135 Instruction Si12-714 To adjust the vertical blades (louvers) Hold the knob and move the louvers. (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 136 Si12-714 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 137 Instruction Si12-714 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 138 Si12-714 Instruction FTK(X)E 25/35 B 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”. The display will light up and the flaps will begin to swing.
  • Page 139 Instruction Si12-714 ■ 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.) Notes on flaps and louvres angles • When “ SWING button ” is selected, the flaps In DRY mode or COOL mode swinging range depends on the operation mode.
  • Page 140 Si12-714 Instruction FLK(X) 25/35/50/60 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 flaps will begin to swing.
  • Page 141 Instruction Si12-714 ■ To adjust the vertical blades (louvres) • When adjusting the louvre, use a robust and stable stool and watch your steps carefully. Hold the knob and move the louvres. (You will find a knob on the left side and the right side blades.) Notes on flap and louvres angles •...
  • Page 142 Si12-714 Instruction FWKG 25/35 A Adjusting the Air Flow Direction Smartly adjust the air flow direction to make more comfortable wind blow. Adjusting the air flow in the vertical direction Air-flow in vertical direction can be adjusted 3 steps by hand. Hold the horizontal blade and move up or down to the desired position.
  • Page 143 Instruction Si12-714 Adjusting the air flow in the horizontal direction Hold a knob of louvers (vertical blades) and move to the left or right. (Each knob is located on the left-side and the right-side blades.) Operation Manual...

  • Page 144: Powerful Operation

    Si12-714 Instruction 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 HOME LEAVE...

  • Page 145: Outdoor Unit Quiet Operation

    Instruction Si12-714 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 conve- nient during night. To start OUTDOOR UNIT QUIET operation 1.

  • Page 146: Econo Operation

    Si12-714 Instruction ECONO Operation FTKD 25/35 D 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 operation 2.

  • Page 147: Mold Proof Operation

    Instruction Si12-714 2.10 MOLD PROOF Operation FTKD 25/35 D 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.

  • Page 148: Home Leave Operation

    Si12-714 Instruction 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” . • The HOME LEAVE lamp lights up. To cancel HOME LEAVE 1, 2 HOME LEAVE...
  • Page 149 Instruction Si12-714 ■ 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 150: Intelligent Eye Operation

    Si12-714 Instruction 2.12 INTELLIGENT EYE Operation 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 151 Instruction Si12-714 “INTELLIGENT EYE” is useful for Energy Saving. Energy saving operation • Change the temperature +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 152 Si12-714 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 153 Instruction Si12-714 “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 154 Si12-714 Instruction FTK(X)E 25/35 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 155 Instruction Si12-714 ■ To adjust the angle of the INTELLIGENT EYE sensor • You can adjust the angle of the INTELLIGENT EYE sensor to increase the detection area. (Adjustable angle: 15° to right and left of centre) INTELLIGENT EYE 15˚ 15˚...

  • Page 156: Timer Operation

    Si12-714 Instruction 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 opera- tion •...
  • Page 157 Instruction Si12-714 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 158: Note For Multi System

    Si12-714 Instruction 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 159 Instruction Si12-714 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 160: Care And Cleaning

    Si12-714 Instruction 2.15 Care and Cleaning 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. Front panel 1.
  • Page 161 Instruction Si12-714 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 Photocatalytic deodor- izing filter, Air-Purifying filter. •...
  • Page 162 Si12-714 Instruction NOTE • Operation with dirty filters : (1) cannot deodorize the air. (2) cannot clean the air. (3) results in poor cooling. (4) may cause odour. • The air purifying filter and photocatalytic deodorizing filter cannot be reused, even if washed. •...

  • Page 163: Front Panel

    Instruction Si12-714 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 164 Si12-714 Instruction 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 165 Instruction Si12-714 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 166 Si12-714 Instruction FTK(X)E 25/35 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.
  • Page 167 Instruction Si12-714 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 168 Si12-714 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 earth wire is not disconnected or broken. Check that the drain comes smoothly out of the drain hose during COOL or DRY operation.
  • Page 169 • 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 170 • 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 171 Instruction Si12-714 FLK(X) 25/35/50/60 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.
  • Page 172 Si12-714 Instruction 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 173 Instruction Si12-714 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 174 Si12-714 Instruction FWKG 25/35 A Care and Cleaning CAUTION Before cleaning, be sure to stop the operation and turn the breaker OFF. When removing or attaching the front grille, use a robust and stable stool and watch your steps carefully. When removing or attaching the front grille, support the grille securely with both hands to prevent it from falling.
  • Page 175 Instruction Si12-714 Care and Cleaning Attaching, maintenance and changing the Air purifying filter with photocatalytic deodorizing function Air purifying filter with photocatalytic deodorizing function are attached in the accessory CAUTION Do not touch the metal parts of the indoor unit, since it may cause an injury. Air purifying filter with photocatalytic deodorizing function [gray] The air purifying capacity of the photocatalytic purifying filter can be renewed by washing it...
  • Page 176 Si12-714 Instruction Care and Cleaning 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.

  • Page 177: Troubleshooting

    Instruction Si12-714 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 178: Check Again

    Si12-714 Instruction 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 179: Call The Service Shop Immediately

    Instruction Si12-714 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.

  • Page 180: Part 6 Service Diagnosis

    Si12-714 Part 6 Service Diagnosis 1. Caution for Diagnosis.................170 1.1 Troubleshooting with Operation Lamp ..........170 2. Problem Symptoms and Measures .............172 3. Service Check Function ..............173 4. Code Indication on the Remote Controller ..........176 4.1 Error Codes and Description of Fault ...........176 5.

  • Page 181: Caution For Diagnosis

    Caution for Diagnosis Si12-714 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 182 Si12-714 Caution for Diagnosis In case of FLK(X) 25/35/50/60 A Series OPERATION lamp (green) (Q0341) In case of FWKG 25/35 A Series Operation lamp (green) (R4792) Caution: Operation stops suddenly. (Operation lamp blinks.) Cause of above trouble could be "Operation mode conflict". Check followings;...

  • Page 183: Problem Symptoms And Measures

    Problem Symptoms and Measures Si12-714 Problem Symptoms and Measures Problem Symptom Check Item Details of Measure Page to be referred None of the units operates. Check the power supply. Check to make sure that the rated voltage is — supplied. Check the type of the indoor units.

  • Page 184: Service Check Function

    Si12-714 Service Check Function Service Check Function 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 185 Service Check Function Si12-714 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 186 Si12-714 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. ★...

  • Page 187: Code Indication On The Remote Controller

    Code Indication on the Remote Controller Si12-714 4. Code Indication on the Remote Controller Error Codes and Description of Fault Code Indication Description of Problem System Normal Insufficient gas Low-voltage detection Signal transmission error (between indoor and outdoor units) Unspecified voltage (between indoor and outdoor units) Anti-icing function in other rooms Indoor Indoor unit PCB abnormality...

  • Page 188: Troubleshooting

    Si12-714 Troubleshooting 5. Troubleshooting Indoor Units - : Not used for troubleshooting ∗ : Varies depending on the cases. Indication on the Description of the Fault Details of fault remote controller (Refer to the indicated page.) Indoor unit in normal condition (Conduct a diagnosis of the —...

  • Page 189: Outdoor Units

    Troubleshooting Si12-714 Outdoor Units : ON, : OFF, : Blinks Green : Flashes when in normal condition Red : OFF in normal condition - : Not used for troubleshooting ∗ : Varies depending on the cases. Outdoor Unit LED Indication Indication on Description of The Fault the remote...

  • Page 190: Indoor Unit Pcb Abnormality

    Si12-714 Troubleshooting 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 Faulty indoor unit PCB Causes Faulty connector connection Troubleshooting...

  • Page 191: Freeze-Up Protection Control Or High Pressure Control

    Troubleshooting Si12-714 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 192 Si12-714 Troubleshooting 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.219 Is there any Provide sufficient air passage. short-circuit? Check the intake air filter. Is it very dirty? Clean the air filter.

  • Page 193: Fan Motor Or Related Abnormality

    Troubleshooting Si12-714 Fan Motor or Related Abnormality 5.5.1 AC Motor 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 When the detected rotation speed does not reach the demanded rotation speed of the target tap, and is less than 50% of the maximum fan motor rotation speed.
  • Page 194 Si12-714 Troubleshooting 5.5.2 DC Motor 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 When the detected rotation speed does not reach the demanded rotation speed of the target tap, and is less than 50% of the maximum fan motor rotation speed.
  • Page 195 Troubleshooting Si12-714 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.216 and rotate fan by hand. Check No.02 Does fan rotate Replace fan motor.

  • Page 196: Thermistor Or Related Abnormality (Indoor Unit)

    Si12-714 Troubleshooting Thermistor or Related Abnormality (Indoor Unit) C4 , C9 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 197: Signal Transmission Error (Between Indoor And Outdoor Units)

    Troubleshooting Si12-714 Signal Transmission Error (between Indoor and Outdoor Units) Remote Controller Display Method of The data received from the outdoor unit in indoor unit-outdoor unit signal transmission is checked whether it is normal. Malfunction Detection Malfunction When the data sent from the outdoor unit cannot be received normally, or when the content of the data is abnormal.
  • Page 198 Si12-714 Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.10 Check the indoor unit-outdoor unit Refer to P.222 connection wires. Is there any wiring error? Correct the indoor unit-outdoor unit connection wires.

  • Page 199: Unspecified Voltage (Between Indoor And Outdoor Units)

    Troubleshooting Si12-714 Unspecified Voltage (between Indoor and Outdoor Units) Remote Controller Display Method of The supply power is detected for its requirements (different from pair type and multi type) by the indoor / outdoor transmission signal. Malfunction Detection Malfunction The pair type and multi type are interconnected. Decision Conditions Supposed...

  • Page 200: Freeze-Up Protection Control

    Si12-714 Troubleshooting Freeze-up Protection Control Remote Controller Display Outdoor Unit LED Display Method of Indoor unit icing, during cooling operation, is detected by checking the temperatures sensed by the indoor unit heat exchanger thermistor and room temperature thermistor that are located in a Malfunction shut-down room.
  • Page 201 Troubleshooting Si12-714 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.04 Check the wiring and piping. Refer to P.217 Check No.06 Wiring or piping out of spec? Activate the wiring error Refer to P.219 check mode.

  • Page 202: Ol Activation (Compressor Overload)

    Si12-714 Troubleshooting 5.10 OL Activation (Compressor Overload) Remote Controller Display Outdoor Unit LED Display Method of A compressor overload is detected through compressor OL. Malfunction Detection Malfunction If the compressor OL is activated twice, the system will be shut down. The error counter will reset itself if this or any other error does not occur during the following Decision 60-minute compressor running time (total time).

  • Page 203: Compressor Lock

    Troubleshooting Si12-714 5.11 Compressor Lock Remote Controller Display Outdoor Unit LED Display Method of A compressor lock is detected by checking the compressor running condition through the position detection circuit. Malfunction Detection Malfunction The position detection circuit detects a compressor frequency of below 10 Hz for 20 seconds or a frequency of above 160 Hz.

  • Page 204: Dc Fan Lock

    Si12-714 Troubleshooting 5.12 DC Fan Lock Remote Controller Display Outdoor Unit LED Display Method of A fan motor line error is detected by checking the high-voltage fan motor rpm being detected by the Hall IC. Malfunction Detection Malfunction The fan does not start in 30 seconds even when the fan motor is running. The system will be shut down if the error occurs 16 times.

  • Page 205: Input Over Current Detection

    Troubleshooting Si12-714 5.13 Input Over Current Detection Remote Controller Display Outdoor Unit LED Display Method of Malfunction is detected by checking the input current value. Malfunction Detection Malfunction The following condition continues for 2.5 seconds. Input current ≥ 16.5A (typical value) Decision The compressor halts if the error occurs, and restarts automatically after 3 minutes stand-by.
  • Page 206 Si12-714 Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.07 ∗ An input over-current may result from wrong internal wiring. If the wires have been disconnected and Refer to P.220 reconnected for part replacement, for example, and the system is interrupted by an input over-current, take the following procedure.

  • Page 207: Four Way Valve Abnormality

    Troubleshooting Si12-714 5.14 Four Way Valve Abnormality Remote Controller Display Outdoor Unit LED Display Method of The liquid pipe thermistor, the outdoor temperature thermistor and the outdoor unit heat exchanger thermistor are checked to see if they function within their normal ranges in the Malfunction operating mode.
  • Page 208 Si12-714 Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.05 Refer to P.218 Four-way valve coil Correct. disconnected (loose)? Check No.06 Refer to P.219 Harness out of connector? Reconnect.

  • Page 209: Discharge Pipe Temperature Control

    Troubleshooting Si12-714 5.15 Discharge Pipe Temperature Control Remote Controller Display Outdoor Unit LED Display Method of The discharge pipe temperature control (stop, frequency drooping, etc.) is checked with the temperature being detected by the discharge pipe thermistor. Malfunction Detection Malfunction 2YC45, 2YC63 If the temperature being detected by the discharge pipe thermistor rises above 120°C, the Decision...

  • Page 210: High Pressure Control In Cooling

    Si12-714 Troubleshooting 5.16 High Pressure Control in Cooling Remote Controller Display Outdoor Unit LED Display Method of High-pressure control (stop, frequency drop, etc.) is activated in the cooling mode if the temperature being sensed by the heat exchanger thermistor exceeds the limit. Malfunction Detection Malfunction...
  • Page 211 Troubleshooting Si12-714 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.04 Refer to P.217 Check the installation space. Check No.06 Check No.07 Abnormal Installation condition Change the air outlet grille Refer to P.219 check position.

  • Page 212: Position Sensor Abnormality

    Si12-714 Troubleshooting 5.17 Position Sensor Abnormality Remote Controller Display Outdoor Unit LED Display Method of A compressor startup failure is detected by checking the compressor running condition through the position detection circuit. Malfunction Detection Malfunction The compressor fails to start in about 15 seconds after the compressor run command signal is sent.

  • Page 213: Ct Or Related Abnormality

    Troubleshooting Si12-714 5.18 CT or Related Abnormality Remote Controller Display Outdoor Unit LED Display Method of A CT or related error is detected by checking the compressor running frequency and CT- detected input current. Malfunction Detection Malfunction The compressor running frequency is below 55 Hz and the CT input is below 0.1 V. (The input current is also below 1.25 A.) Decision If this error repeats 4 times, the system will be shut down.
  • Page 214 Si12-714 Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.12 Turn off the power and turn it on Refer to P.223 again. Get the system started. ∗...

  • Page 215: Thermistor Or Related Abnormality (Outdoor Unit)

    Troubleshooting Si12-714 5.19 Thermistor or Related Abnormality (Outdoor Unit) P4 , J3 , J6 , J8 , J9 , H9 Remote Controller Display Outdoor Unit LED Display Method of This type of error is detected by checking the thermistor input voltage to the microcomputer. [A thermistor error is detected by checking the temperature being detected by each thermistor.] Malfunction Detection...
  • Page 216 Si12-714 Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.06 Turn on the power again. Refer to P.219 Error displayed again Reconnect. on remote controller? Connector or thermistor Reconnect.

  • Page 217: Electrical Box Temperature Rise

    Troubleshooting Si12-714 5.20 Electrical Box Temperature Rise Remote Controller Display Outdoor Unit LED Display Method of An electrical box temperature rise is detected by checking the radiation fin thermistor with the compressor off. Malfunction Detection Malfunction With the compressor off, the radiation fin temperature is above °C.
  • Page 218 Si12-714 Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.06 WARNING Turn off the power and turn it on Refer to P.219 again. To cool down the electricals, the outdoor unit fan gets started when the radiation fin temperature rises above 80˚C and stops itself when...

  • Page 219: Radiation Fin Temperature Rise

    Troubleshooting Si12-714 5.21 Radiation Fin Temperature Rise Remote Controller Display Outdoor Unit LED Display Method of A radiation fin temperature rise is detected by checking the radiation fin temperature being detected by the fin thermistor with the compressor on. Malfunction Detection Malfunction The radiation fin temperature with the compressor on is above...
  • Page 220 Si12-714 Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Be sure to turn off power switch before connect or disconnect connector, Caution Caution or parts damage may be occurred. or parts damage may be occurred. Check No.06 Turn off the power and turn it on Turn off the power and turn it on...

  • Page 221: Output Over Current Detection

    Troubleshooting Si12-714 5.22 Output Over Current Detection Remote Controller Display Outdoor Unit LED Display Method of An output over-current is detected by checking the current that flows in the inverter DC section. Malfunction Detection Malfunction A position signal error occurs while the compressor is running. A speed error occurs while the compressor is running.
  • Page 222 Si12-714 Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.07 ∗ An output over-current may result from wrong internal wiring. If the wires have been disconnected and Refer to P.220 reconnected for part replacement, for example, and the system is interrupted by an output over-current, take the following procedure.

  • Page 223: Insufficient Gas

    Troubleshooting Si12-714 5.23 Insufficient Gas Remote Controller Display Outdoor Unit LED Display Method of Gas shortage detection I: Gas shortage is detected by checking the input current value and the compressor running Malfunction frequency. If the gas is short, the input current is smaller than the normal value. Detection Gas shortage detection II: Gas shortage is detected by checking the discharge temperature and the opening of the...
  • Page 224 Si12-714 Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.04 Refer to P.217 Any thermistor Reconnect in position. disconnected? * Discharge pipe thermistor * Indoor / outdoor unit heat exchanger thermistor Check No.06 * Room temperature thermistor Refer to P.219...

  • Page 225: Low-Voltage Detection

    Troubleshooting Si12-714 5.24 Low-voltage Detection Remote Controller Display Outdoor Unit LED Display Method of An abnormal voltage rise or drop is detected by checking the detection circuit or DC voltage detection circuit. Malfunction Detection Malfunction An over-voltage signal is fed from the over-voltage detection circuit to the microcomputer, or the voltage being detected by the DC voltage detection circuit is judged to be below 150 V Decision for 0.1 second.

  • Page 226: Anti-Icing Function In Other Rooms / Unspecified Voltage (Between Indoor And Outdoor Units)

    Si12-714 Troubleshooting 5.25 Anti-icing Function in Other Rooms / Unspecified Voltage (between Indoor and Outdoor Units) UA , UH Remote Controller Display Outdoor Unit LED Display Method of A wrong connection is detected by checking the combination of indoor and outdoor units on the microcomputer.

  • Page 227: Check

    Check Si12-714 6. Check How to Check 6.1.1 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 228: Electronic Expansion Valve Check

    Si12-714 Check 6.1.2 Electronic Expansion Valve Check Check No.04 Conduct the followings to check the electronic expansion valve (EV). 1. Check to see if the EV connector is correctly inserted in the PCB. Compare the EV unit and the connector number. 2.

  • Page 229: Four Way Valve Performance Check

    Check Si12-714 6.1.3 Four Way Valve Performance Check Check No.05 Turn off the power and turn it on again. ∗ Four way valve coil Cooling / dry : No continuity Start the heating-mode run. Heating : Continuity S80 voltage at DC 220-240 V with Replace the outdoor unit compressor on? PCB.
  • Page 230 Si12-714 Check 6.1.4 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 231: Installation Condition Check

    Check Si12-714 6.1.5 Installation Condition Check Check No.07 Installation condition check Check the allowable Abnormal Change the position of the air dimensions of the air suction discharge grille or the and discharge area. installation location. Normal Does the discharged air from other outdoor Change the position of the air unit cause an increase of discharge grille or the...

  • Page 232: Discharge Pressure Check

    Si12-714 Check 6.1.6 Discharge Pressure Check Check No.08 Discharge pressure check High Replace compessor. Open the stop valve. Is the stop valve open? Is the Replace the pipe installed at connection pipe deformed? the site. At the heat exchanger and Clean.

  • Page 233: Power Supply Waveforms Check

    Check Si12-714 6.1.8 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 234: Capacitor Voltage Check

    Si12-714 Check 6.1.10 Capacitor Voltage Check Check No.12 Before this checking, be sure to check the main circuit for short-circuit. Checking the capacitor voltage With the circuit breaker still on, measure the voltage according to the drawing of the model in question.

  • Page 235: Main Circuit Electrolytic Capacitor Check

    Check Si12-714 6.1.12 Main Circuit Electrolytic Capacitor Check Check No.14 Checking the main circuit electrolytic capacitor Never touch any live parts for at least 10 minutes after turning off the circuit breaker. If unavoidably necessary to touch a live part, make sure there is no DC voltage using the tester.

  • Page 236: Hall Ic Check

    Si12-714 Check 6.1.14 Hall IC Check Check No.16 1. Check the connector connection. 2. With the power ON, operation OFF, and the connector connected, check the following. ∗ Output voltage of about 5 V between pins 1 and 3. ∗ Generation of 3 pulses between pins 2 and 3 when the fan motor is operating.
  • Page 237 Check Si12-714 Service Diagnosis...

  • Page 238: Part 7 Removal Procedure

    Si12-714 Part 7 Removal Procedure 1. Outdoor Unit (100 Class) ..............228 1.1 Removal of Outer Panels ..............228 1.2 Removal of the Electrical Box ..............245 1.3 Removal of PCB...................251 1.4 Removal of Fan Motor................257 1.5 Removal of Coils / Thermistors ............259 1.6 Removal of Reactor................265 1.7 Removal of Sound Blanket..............266 1.8 Removal of Compressor...............269...

  • Page 239: Outdoor Unit (100 Class)

    Outdoor Unit (100 Class) Si12-714 1. Outdoor Unit (100 Class) 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. Removing the suction grille.
  • Page 240 Si12-714 Outdoor Unit (100 Class) Step Procedure Points Next, slide the grille downward to undo the 3 Hooks top hooks. Remove the suction grille. 2. Removing the top panel. Remove 3 screws on the back and 1 screw on the left side panel. Removal Procedure...
  • Page 241 Outdoor Unit (100 Class) Si12-714 Step Procedure Points Remove 4 screws on the front and 1 screw on the right side panel. Lift the top panel and remove it. 3. Removing the right side panel. Remove 4 screws. Removal Procedure...
  • Page 242 Si12-714 Outdoor Unit (100 Class) Step Procedure Points Slide the panel downward to undo 2 hooks on the back side. Hooks Hooks Hook Holes Hook Holes Hook Holes Removal Procedure...
  • Page 243 Outdoor Unit (100 Class) Si12-714 Step Procedure Points Remove the right side panel. 4. Removing the front panel Front Panel (2) Remove the 2 screws. Front Panel (1) There is a hook at the The hook is provided to keep top of the front panel (2).
  • Page 244 Si12-714 Outdoor Unit (100 Class) Step Procedure Points Slide the panel downward to undo 2 hooks. Remove the front panel (2). Removal Procedure...
  • Page 245 Outdoor Unit (100 Class) Si12-714 Step Procedure Points 5. Removing the front panel Remove the discharge grille and propeller fan first to remove the front panel (1). Front Remove the 4 screws Panel (1) on the discharge grille. Discharge grille Pull the bottom of the discharge grille toward yourself.
  • Page 246 Si12-714 Outdoor Unit (100 Class) Step Procedure Points Next, slide the grille downward to undo the 2 hooks at the top. Hooks Remove the discharge grille. Removal Procedure...
  • Page 247 Outdoor Unit (100 Class) Si12-714 Step Procedure Points Remove the 2 fixing screws from the fan motor mount. Fixing screw Remove the propeller Fan fixing nut : M8 fan fixing nut. Removal Procedure...
  • Page 248 Si12-714 Outdoor Unit (100 Class) Step Procedure Points Remove the 2 fixing screws on the partition plate. Remove the screw at bottom left of the front. Remove the screw at bottom of the left side. Removal Procedure...
  • Page 249 Outdoor Unit (100 Class) Si12-714 Step Procedure Points Remove the screw at bottom of the back side. The front panel (1) is provided with a hook on its front. Lift the front panel off position to remove it. Hook Removal Procedure...
  • Page 250 Si12-714 Outdoor Unit (100 Class) Step Procedure Points Remove the front panel (1). The back is a little complicated in shape. Be sure to detach carefully. 6. Removing the rear panel Remove the fixing screw on the partition plate. Removal Procedure...
  • Page 251 Outdoor Unit (100 Class) Si12-714 Step Procedure Points Slide the panel leftward to undo the hooks. Hook Remove the partition plate. Remove the 6 screws. Removal Procedure...
  • Page 252 Si12-714 Outdoor Unit (100 Class) Step Procedure Points Remove the wire fixing plate. Remove the screw of the earth. Removal Procedure...
  • Page 253 Outdoor Unit (100 Class) Si12-714 Step Procedure Points Undo the holder of the The holder is secured in the thermistor. clearances of the heat exchanger fins. Groove Remove the 3 fixing screws on the partition plate. Removal Procedure...
  • Page 254 Si12-714 Outdoor Unit (100 Class) Step Procedure Points Remove the fixing screw from the bottom frame. Remove the fixing screw from the shut-off valve mounting plate. Lift the panel upward to undo the 2 hooks and remove it. Removal Procedure...
  • Page 255 Outdoor Unit (100 Class) Si12-714 Step Procedure Points Hooks The bottom is sandwiched in the bottom frame. Lift up to detach. Remove the rear panel. Removal Procedure...

  • Page 256: Removal Of The Electrical Box

    Si12-714 Outdoor Unit (100 Class) Removal of the Electrical Box Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the fixing screw from the shut-off valve mounting plate. Remove the fixing screw on the partition plate.
  • Page 257 Outdoor Unit (100 Class) Si12-714 Step Procedure Points Disconnect the fan motor connector S70. [S70] Disconnect the fan motor wire harness. Disconnect the 4 A : Connector S20(white), motorized valve B : Connector S21(red), connectors (for Rooms C : Connector S22(blue), A, B, C and D).
  • Page 258 Si12-714 Outdoor Unit (100 Class) Step Procedure Points Disconnect the Detach the clamp. motorized valve Just pull the push-mount [S80] connector S80. type out of position. clamp Disconnect the liquid pipe thermistor [S93] connector S93. Disconnect the gas pipe thermistor connector [S92] S92.
  • Page 259 Outdoor Unit (100 Class) Si12-714 Step Procedure Points 11 Disconnect the OL connector S40. [S40] 12 The wire harness is hooked on the bottom of the electrical box. Unhook it and remove the clamp. clamp 13 Disconnect the 2 reactor wire harnesses. Reactors Removal Procedure...
  • Page 260 Si12-714 Outdoor Unit (100 Class) Step Procedure Points 14 Remove the OL wire harness and the compressor wire harness together from the partition. clamps 15 Use long-nose pliers or Detach the clamp. clamps the like to pull out the Just pull the push-mount clamps.
  • Page 261 Outdoor Unit (100 Class) Si12-714 Step Procedure Points 17 Cut off the clamps of Cut off with nippers. the OL wire harness and compressor wire harness. 18 First, slide the box leftward do undo the hook on the right side of the box.

  • Page 262: Removal Of Pcb

    Si12-714 Outdoor Unit (100 Class) 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 Remove the screw. Undo the 2 hooks. Lift up your side of the control PCB.
  • Page 263 Outdoor Unit (100 Class) Si12-714 Step Procedure Points Disconnect the Connectors S33 & S71: connectors one by one For inverter PCB starting from your side. Connectors S31 & S32: For SPM PCB Connectors S51 & S101: For display PCB Connector S10: For relay Connectors H1/H2: For DB (diode bridge), power wire harnesses AC1 (red) and...
  • Page 264 Si12-714 Outdoor Unit (100 Class) Step Procedure Points Disconnect the Blue, yellow, red, and brown connector of the compressor. Connector of compressor Remove the 7 screws. Lift the inverter PCB upward to remove it. Removal Procedure...
  • Page 265 Outdoor Unit (100 Class) Si12-714 Step Procedure Points 3. Removing the SPM. Remove the 2 screws. Remove the 2 screws. Remove the screw (rectifier stack). Remove the rectifier stack. Removal Procedure...
  • Page 266 Si12-714 Outdoor Unit (100 Class) Step Procedure Points Remove the SPM. 4. Removing the display PCB. Remove the filament tape. Filament tape Remove the drip proof cover. Drip proof cover Slightly lift the top hooks to detach. Removal Procedure...
  • Page 267 Outdoor Unit (100 Class) Si12-714 Step Procedure Points Undo the bottom hook to remove the display PCB. 5. Removing the servicing cover off the terminal block assembly. Remove the screw. Lift the hook to detach. Open the cover toward yourself. Removal Procedure...

  • Page 268: Removal Of Fan Motor

    Si12-714 Outdoor Unit (100 Class) 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 Remove the 2 screws Be sure to remove the bottom at the bottom first.
  • Page 269 Outdoor Unit (100 Class) Si12-714 Step Procedure Points Remove the fan motor. When reassembling, be sure to place the wire harness lower. Harness Removal Procedure...

  • Page 270: Removal Of Coils / Thermistors

    Si12-714 Outdoor Unit (100 Class) Removal of Coils / Thermistors 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 motorized valve coil Pull the motorized valve coil out of position.
  • Page 271 Outdoor Unit (100 Class) Si12-714 Step Procedure Points Remove the clamp from the gas pipe thermistor, and pull out the thermistor. Gas pipe thermistor clamps Removal Procedure...
  • Page 272 Si12-714 Outdoor Unit (100 Class) Step Procedure Points Peel the putty from the liquid pipe thermistor, and pull out the thermistor. Liquid pipe thermistor 2. Removal of Thermistors Pull out the heat exchanger thermistor. Removal Procedure...
  • Page 273 Outdoor Unit (100 Class) Si12-714 Step Procedure Points Remove the spring from Be careful not to lose the the heat exchanger spring. thermistor. Spring Slightly open the sound blanket. Remove the insulation sleeve. Removal Procedure...
  • Page 274 Si12-714 Outdoor Unit (100 Class) Step Procedure Points Remove the discharge pipe thermistor. Remove the fixture. 3. Removing the Four way valve coil and motorized valve coil Remove the screw. Removal Procedure...
  • Page 275 Outdoor Unit (100 Class) Si12-714 Step Procedure Points Remove the Four way valve coil. Remove the screw. Remove the motorized valve coil. Removal Procedure...

  • Page 276: Removal Of Reactor

    Si12-714 Outdoor Unit (100 Class) Removal of Reactor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the screw. Lift the reactor upward to undo the hooks. Remove the reactor.

  • Page 277: Removal Of Sound Blanket

    Outdoor Unit (100 Class) Si12-714 Removal of Sound Blanket Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Disconnect the Fixed at 2 locations compressor wire harness from the partition plate.
  • Page 278 Si12-714 Outdoor Unit (100 Class) Step Procedure Points Remove the sound The sound blanket is fragile. blanket (top upper). Carefully pass the discharge pipe through it. Remove the sound The sound blanket is fragile. blanket (outer sleeve). Be careful of the notches of the compressor mount (3 locations).
  • Page 279 Outdoor Unit (100 Class) Si12-714 Step Procedure Points Remove the sound The sound blanket is fragile. blanket (top lower). Carefully pass the discharge pipe through it. Open the sound blanket (inner sleeve) and remove part of the muffler. The sound blanket is fragile. Be careful of the notches of the compressor mount (3 locations).

  • Page 280: Removal Of Compressor

    Si12-714 Outdoor Unit (100 Class) Removal of Compressor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the terminal cover. Pull out the 4 leads U:red, V:yellow, W:blue, using long-nose pliers.
  • Page 281 Outdoor Unit (100 Class) Si12-714 Step Procedure Points Remove the screw. Removal Procedure...

  • Page 282: Outdoor Unit (80 / 90 Class)

    Si12-714 Outdoor Unit (80 / 90 Class) 2. Outdoor Unit (80 / 90 Class) 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 External appearance.
  • Page 283 Outdoor Unit (80 / 90 Class) Si12-714 Step Procedure Points Unscrew 3 screws of the right panel, slide it downwards and release the tabs to remove. The figure shows the view of piping connections. Unscrew 1 screw of the front right panel, slide it downwards and release the tabs to remove.
  • Page 284 Si12-714 Outdoor Unit (80 / 90 Class) Step Procedure Points Unscrew 3 screws of the front panel to remove. Remove 4 screws of the discharge outlet grill. Slide the discharge outlet grill upwards and release 6 tabs to remove. Removal Procedure...

  • Page 285: Removal Of Propeller Fans

    Outdoor Unit (80 / 90 Class) Si12-714 Removal of Propeller Fans Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the discharge outlet grill To take off propeller fan, remove the washer-fitted nut M8.

  • Page 286: Removal Of Electrical Box

    Si12-714 Outdoor Unit (80 / 90 Class) Removal of Electrical Box Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the outer panels Match the colors of the tie such as top and front wires to A, B, C and D ports panels.
  • Page 287 Outdoor Unit (80 / 90 Class) Si12-714 Step Procedure Points Remove the earth wire. Remove 1 screw of the terminal board. Release the tab on the top right of the terminal board. Pull out the terminal Glass tube fuse and varistor board and open it.
  • Page 288 Si12-714 Outdoor Unit (80 / 90 Class) Step Procedure Points 2. Remove each wire harness Disconnect 4 connectors of the electronic expansion Connector Electronic Harness expansion length valve lead wires. valve No. (White) (Red) (Blue) (Yellow) When reconnecting, make sure to match the wire to the correct connector.
  • Page 289 Outdoor Unit (80 / 90 Class) Si12-714 Step Procedure Points Remove the connector for gas pipe thermistor. Remove the connector for thermistor. Outdoor air thermistor (Blue) Discharge pipe thermistor (Black) Heat exchanger thermistor (Gray) Remove the overload relay connector S40. Remove the reactor lead wire.
  • Page 290 Si12-714 Outdoor Unit (80 / 90 Class) Step Procedure Points Remove the relay connector for compressor. Remove the electrical box cover. Disconnect the fan motor connector. Remove the discharge pipe thermistor. Removal Procedure...
  • Page 291 Outdoor Unit (80 / 90 Class) Si12-714 Step Procedure Points Take off the thermistor Place the thermistor so that presser spring, and its end comes up to the end remove the thermistor. of the presser spring. Be careful not to lose the presser spring for the discharge pipe thermistor.
  • Page 292 Si12-714 Outdoor Unit (80 / 90 Class) Step Procedure Points Remove the outdoor air thermistor lead wire from the groove. Remove each wire harness, and dismount the electrical box by lifting it. Removal Procedure...

  • Page 293: Removal Of Pcb

    Outdoor Unit (80 / 90 Class) Si12-714 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 controller Release the tab of the electrical box, and open the terminal board.
  • Page 294 Si12-714 Outdoor Unit (80 / 90 Class) Step Procedure Points Lift the PCB at the terminal board side. Disconnect each wire harness connector linked to the inverter PCB. Removal Procedure...
  • Page 295 Outdoor Unit (80 / 90 Class) Si12-714 Step Procedure Points The figure shows the S20: Electronic expansion valve controller PCB. coil A port S21: Electronic expansion valve coil B port S22: Electronic expansion valve coil C port S23: Electronic expansion valve coil D port S31: To CN14 (Pin 9) S32: To CN11 (Pin 5)

  • Page 296: Removal Of Fan Motor

    Si12-714 Outdoor Unit (80 / 90 Class) 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 Remove the outer panels. Remove the fan motor lead wire connector S70.
  • Page 297 Outdoor Unit (80 / 90 Class) Si12-714 Step Procedure Points Remove 4 screws of the fan motor. Cut the wrapper fixing the lead wire. When reassembling, fix the lead wire to avoid contact with the propeller fan. Remove the fan motor. Removal Procedure...

  • Page 298: Removal Of Electronic Expansion Valve And Thermistor

    Si12-714 Outdoor Unit (80 / 90 Class) Removal of Electronic Expansion Valve Thermistor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove each wire Place the thermistor so that harness.

  • Page 299: Removal Of Sound Blanket And Reactor

    Outdoor Unit (80 / 90 Class) Si12-714 Removal of Sound Blanket Reactor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Release the clip fixing the compressor lead wire.
  • Page 300 Si12-714 Outdoor Unit (80 / 90 Class) Step Procedure Points Remove the sound Carefully remove the sound blanket (top). blanket, which is easily torn in the piping section. Remove the sound blanket (inner). Remove 1 screw of the reactor. Removal Procedure...

  • Page 301: Removal Of Shunt

    Outdoor Unit (80 / 90 Class) Si12-714 Removal of Shunt Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove 6 screws of Fasten the rubber packing the tie wire presser with double-faced adhesive plate.

  • Page 302: Removal Of Solenoid Valve And Four Way Valve

    Si12-714 Outdoor Unit (80 / 90 Class) Removal of Solenoid Valve Four Way Valve Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the outer panels. 1.
  • Page 303 Outdoor Unit (80 / 90 Class) Si12-714 Step Procedure Points Before taking this Reassembling precautions procedure, make sure 1. Use non-oxidizing brazing there is no refrigerant gas method. If nitrogen gas is not left in the refrigerant available, braze the parts pipes.

  • Page 304: Removal Of Compressor

    Si12-714 Outdoor Unit (80 / 90 Class) 2.10 Removal of Compressor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the terminal cover. Remove the overload relay.
  • Page 305 Outdoor Unit (80 / 90 Class) Si12-714 Step Procedure Points Make sure there is no refrigerant gas left inside Warning the refrigerant pipes The compressor's refrigerating before starting the job. machine oil may catch fire. Have When heating up the wet cloth at hand for quickly brazed parts, make sure putting out the fire.

  • Page 306: Outdoor Unit (58 / 68 / 75 Class)

    Si12-714 Outdoor Unit (58 / 68 / 75 Class) 3. Outdoor Unit (58 / 68 / 75 Class) 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...

  • Page 307: Removal Of Electrical Box

    Outdoor Unit (58 / 68 / 75 Class) Si12-714 Removal of Electrical Box 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 tie wires The figure shows the tie pipe connections.
  • Page 308 Si12-714 Outdoor Unit (58 / 68 / 75 Class) Step Procedure Points Pull out the terminal Glass tube fuse and varistor board to open. cannot be replaced individually because lead- free soldering is provided. 2. Remove each wire harness Disconnect 4 Connector Electronic Harness...
  • Page 309 Outdoor Unit (58 / 68 / 75 Class) Si12-714 Step Procedure Points Disconnect the compressor relay connector. Remove the reactor lead wire. 3. Removing the wiring fixture Remove 6 screws of the wiring fixture. 4. Removing the electrical box. Remove 1 screw of the electrical box.
  • Page 310 Si12-714 Outdoor Unit (58 / 68 / 75 Class) Step Procedure Points Remove 1 screw of the electrical box. Remove the drip-proof cover. Disconnect the fan motor lead wire. Lift up the electrical box and dismount it. Removal Procedure...

  • Page 311: Removal Of Pcb

    Outdoor Unit (58 / 68 / 75 Class) Si12-714 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 controller Remove 1 screw of the PCB, and release 2 tabs.
  • Page 312 Si12-714 Outdoor Unit (58 / 68 / 75 Class) Step Procedure Points Lift up the control PCB. Disconnect each wire harness connector linked to the control PCB. (Pin 9): To CN14 (Pin 5): To CN11 (Pin 10): To S34 (Pin 8): To S72 Removal Procedure...
  • Page 313 Outdoor Unit (58 / 68 / 75 Class) Si12-714 Step Procedure Points The figure shows the Glass tube fuse 3A control PCB. 2. Removing the service monitor PCB The figure shows the service monitor PCB. 3. Removing the inverter (MID2). Remove the 7 screws of the inverter PCB (MID2).

  • Page 314: Removal Of Fan Motor

    Si12-714 Outdoor Unit (58 / 68 / 75 Class) 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 Remove the fan motor For reassembling, align lead wire connector.

  • Page 315: Removal Of Sound Blanket

    Outdoor Unit (58 / 68 / 75 Class) Si12-714 Removal of Sound Blanket Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove 5 screws of the right side panel. Remove 2 screws of the partition board, and remove the board.

  • Page 316: Removal Of Four Way Valve Coil, Solenoid Valve Coil

    Si12-714 Outdoor Unit (58 / 68 / 75 Class) Removal of Four Way Valve Coil, Solenoid Valve Coil, Electronic Expansion Valve Coil Thermistor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points...
  • Page 317 Outdoor Unit (58 / 68 / 75 Class) Si12-714 Step Procedure Points Take off the putty, and Place the thermistor so that remove each its end comes up to the end thermistor. of the presser spring. Be careful not to lose the presser spring for the discharge pipe thermistor.

  • Page 318: Removal Of Four Way Valve, Solenoid Valve And Shunt

    Si12-714 Outdoor Unit (58 / 68 / 75 Class) Removal of Four Way Valve, Solenoid Valve Shunt Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove 1 screw of the Reassembling precautions four way valve coil.

  • Page 319: Removal Of Solenoid Valve And Shunt

    Outdoor Unit (58 / 68 / 75 Class) Si12-714 Removal of Solenoid Valve Shunt Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Before taking this procedure, make sure there is no refrigerant gas Caution left in the refrigerant...

  • Page 320: Removal Of Compressor

    Si12-714 Outdoor Unit (58 / 68 / 75 Class) Removal of Compressor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the terminal cover. Disconnect the As precaution, keep the contents in memorandum.
  • Page 321 Outdoor Unit (58 / 68 / 75 Class) Si12-714 Removal Procedure...
  • Page 322 Si12-714 Part 8 Others 1. Others ....................312 1.1 Test Run from the Remote Controller ..........312 1.2 Jumper Settings ...................313 1.3 Application of Silicon Grease to a Power Transistor and a Diode Bridge..................315 Others...

  • Page 323: Part 8 Others

    Others Si12-714 1. Others Test Run from the Remote Controller For Heat pump In cooling mode, select the lowest programmable temperature; in heating mode, select the highest programmable temperature. Trial operation may be disabled in either mode depending on the room temperature. After trial operation is complete, set the temperature to a normal level.

  • Page 324: Jumper Settings

    Si12-714 Others Jumper Settings 1.2.1 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 325 Others Si12-714 1.2.3 Adjusting the Angle of the INTELLIGENT EYE Sensor Once installation of the indoor unit is complete, adjust the angle of the INTELLIGENT EYE sensor to ensure the detection area properly covers the room. (Adjustable angle : 15° to right and left of center) Gently push and slide the sensor to adjust the angle.

  • Page 326: Application Of Silicon Grease To A Power Transistor And A Diode Bridge

    Si12-714 Others Application of Silicon Grease to a Power Transistor Diode Bridge Applicable All outdoor units using inverter type compressor for room air conditioner. Models When the printed circuit board of an outdoor unit is replaced, it is required that silicon grease (*1) is certainly applied to the heat radiation part (the contact point to the heat radiation fin) of the power transistor and diode bridge.
  • Page 327 Others Si12-714 Others...

  • Page 328: Part 9 Appendix

    Si12-714 Part 9 Appendix 1. Piping Diagrams..................318 1.1 Indoor Units ..................318 1.2 Outdoor Units ..................324 2. Wiring Diagrams..................328 2.1 Indoor Units ..................328 2.2 Outdoor Units ..................331 Appendix...

  • Page 329: Piping Diagrams

    Piping Diagrams Si12-714 1. Piping Diagrams Indoor Units 1.1.1 Wall Mounted Type FTKD25DVM FTKD35DVM INDOOR UNIT INDOOR UNIT MAFFLER ASSY HEAT EXCHANGER MAFFLER ASSY HEAT EXCHANGER 6.4CuT 6.4CuT 6.4CuT 6.4CuT THERMISTOR THERMISTOR 6.4CuT 6.4CuT ON HEAT EXCH. ON HEAT EXCH. 6.4CuT 6.4CuT CROSS FLOW FAN...
  • Page 330 Si12-714 Piping Diagrams FTKD71FVM FTXD50FVM INDOOR UNIT INDOOR UNIT ( 7.9CuT ) (7.9CuT) HEAT EXCHANGER HEAT EXCHANGER THERMISTOR ON HEAT EXCH. THERMISTOR ON HEAT EXCH. CROSS FLOW FAN FIELD PIPING CROSS FLOW FAN ( 6.4CuT ) FIELD PIPING (9.5CuT) FAN MOTOR FIELD PIPING ( 12.7CuT ) ( 12.7CuT )
  • Page 331 Piping Diagrams Si12-714 FTKE25BVM FTKE35BVM FTKE25BVMA8 FTKE35BVMA8 INDOOR UNIT INDOOR UNIT HEAT EXCHANGER HEAT EXCHANGER 7.0CuT 7.0CuT 6.4CuT 6.4CuT THERMISTOR THERMISTOR 6.4CuT 6.4CuT ON HEAT EXCH. ON HEAT EXCH. 6.4CuT 6.4CuT CROSS FLOW FAN CROSS FLOW FAN FIELD PIPING FIELD PIPING (6.4CuT) (6.4CuT) FAN MOTOR...
  • Page 332 Si12-714 Piping Diagrams 1.1.2 Duct Connected Type CDKD25/35/50/60CVM CDK(X)D25/35/50/60CVMA CDKD25/35EAVM CDK(X)D25/35EAVMA INDOOR UNIT (6.4CuT) HEAT EXCHANGER THERMISTOR FIELD PIPING ON HEAT (6.4CuT) EXCH. SIROCCO FAN FAN MOTOR FIELD PIPING CuT) CuT) REFRIGERANT FLOW COOLING CDXD25CMVMC CDKD25DVMT HEATING CDXD25CVMA CDKD25EAVM CDKD25CVMA CDXD25EAVMA CDKD25CVM CDKD25EAVMA...
  • Page 333 Piping Diagrams Si12-714 FLK50AVMA8 FLK60AVMA8 INDOOR UNIT INDOOR UNIT ( 9.5CuT ) ( 9.5CuT ) HEAT EXCHANGER HEAT EXCHANGER THERMISTOR THERMISTOR ON HEAT FIELD PIPING ON HEAT FIELD PIPING EXCH. ( 6.4CuT ) ( 6.4CuT ) EXCH. SIROCCO FAN SIROCCO FAN FAN MOTOR FAN MOTOR ( 12.7CuT )
  • Page 334 Si12-714 Piping Diagrams FLX50AVMA8 FLX60AVMA8 INDOOR UNIT INDOOR UNIT ( 9.5CuT ) ( 9.5CuT ) HEAT EXCHANGER HEAT EXCHANGER THERMISTOR THERMISTOR ON HEAT ON HEAT FIELD PIPING FIELD PIPING EXCH. ( 6.4CuT ) ( 6.4CuT ) EXCH. SIROCCO FAN SIROCCO FAN FAN MOTOR FAN MOTOR ( 12.7CuT )

  • Page 335: Outdoor Units

    Piping Diagrams Si12-714 Outdoor Units 1.2.1 Cooling Only 2MKD58DVM OUTDOOR UNIT HEAT EXCHANGER OUTDOOR TEMPERATURE THERMISTOR ( DOA ) HEADER MOTOR OPERATED VALVE 9.5CuT 6.4CuT ROOM A ( 6.4 CuT ) FILTER FIELD FILTER PIPING HEAT EXCHANGER MOTOR OPERATED VALVE LIQUID THERMISTOR ( DE ) DISTRIBUTOR...
  • Page 336 Si12-714 Piping Diagrams 3MKD75DVM, 3MKD75BVMA8 OUTDOOR UNIT HEAT EXCHANGER OUTDOOR TEMPARETURE THERMISTOR ( DOA ) MOTOR OPERATED VALVE HEADER 6.4CuT 9.5CuT ROOM A ( 6.4 CuT ) FILTER MOTOR OPERATED VALVE 6.4CuT FIELD ROOM B PIPING FILTER ( 9.5 CuT ) FILTER HEAT EXCHANGER LIQUID...
  • Page 337 Piping Diagrams Si12-714 4MKD100DVM OUTDOOR UNIT MOTOR OPERATED HEAT EXCHANGER VALVE (A) OUTDOOR TEMPERATURE THERMISTOR 7.9CuT RECEIVER HEADER 8.0CuT ROOM A HEADER MOTOR OPERATED 8.0CuT FILTER (6.4CuT) VALVE (B) 8.0CuT 7.9CuT 7.9CuT 7.9CuT 8.0CuT ROOM B 8.0CuT MOTOR OPERATED (6.4CuT) FILTER FIELD VALVE (C)
  • Page 338 Si12-714 Piping Diagrams 1.2.2 Heat Pump 3MXD68BVMA8 OUTDOOR UNIT HEAT EXCHANGER OUTDOOR TEMPERATURE THERMISTOR ( DOA ) HEADER MOTOR OPERATED VALVE LIQUID PIPE THERMISTOR ( DLA ) HEADER 6.4CuT 9.5CuT ROOM A ( 6.4 CuT ) FILTER MOTOR OPERATED VALVE LIQUID PIPE THERMISTOR ( DLB ) 6.4CuT FIELD...

  • Page 339: Wiring Diagrams

    Wiring Diagrams Si12-714 2. Wiring Diagrams Indoor Units 2.1.1 Wall Mounted Type FTKD25/35DVM FIELD WIRING. PCB3 PCB1 3.15A LED1 OUTDOOR LED2 CAUTION LED3 TRANSMISSION NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF CIRCUIT THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN.
  • Page 340 Si12-714 Wiring Diagrams FTK(X)D50/60/71FVM 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 341 Wiring Diagrams Si12-714 2.1.3 Floor / Ceiling Suspended Dual Type FLK(X)25/35AVMA, FLK(X)50/60AVMA8 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 342: Outdoor Units

    Si12-714 Wiring Diagrams Outdoor Units 2.2.1 Cooling only 2MKD58DVM POWER SUPPLY FU201 ~50Hz 220-240V MID2 ~60Hz 220-230V 3.15A FIELD WIRING MRM20 MRM10 X11A TO INDOOR UNIT CN11 ROOM A R12T MID1 CN14 3.15A t° ROOM B S101 t° t° t° t°...
  • Page 343 Wiring Diagrams Si12-714 4MKD75/100DVM, 4MKD90BVM, 4MKD90BVMA POWER SUPPLY FU201 ~50Hz 220-240V MID2 ~60Hz 220-230V 3.15A FIELD WIRING MRM20 MRM10 X11A TO INDOOR UNIT CN11 ROOM A MID1 R12T CN14 3.15A t° ROOM B 1 S40 ROOM C S101 ROOM D t°...
  • Page 344 Si12-714 Wiring Diagrams 4MXD80BVMA FU201 MID2 3.15A FIELD WIRING MRM20 MRM10 X11A TO INDOOR UNIT CN11 ROOM A MID1 R12T CN14 3.15A t° ROOM B ROOM C S101 ROOM D t° t° t° t° t° t° t° t° t° t° t°...
  • Page 345 Wiring Diagrams Si12-714 Appendix...

  • Page 346: Index

    Si12-714 Index Numerics connection pipe condensation preventing function ................ 93 3-D airflow ...............58 connectors......36, 38, 40, 42, 44, 47, 49 3-minute stand-by ...........80 control PCB ............301 control PCB (indoor unit) ..37, 39, 41, 42, 45, 48 control PCB (outdoor unit)......50, 51, 52 A1................179 cooling / heating mode lock........
  • Page 347 Si12-714 J8 ..............204 H9................. 204 J9 ..............204 HA ..............36, 40 L3..............206 Hall IC ............ 59, 182, 183 L4..............208 Hall IC check ............225 L5..............210 heat exchanger thermistor ........306 P4 ..............204 heating peak-cut control ......... 82 U0 ..............212 high pressure control in cooling ......199 U2 ..............214 HOME LEAVE operation ........
  • Page 348 Si12-714 mold proof air filter (prefilter) ........70 problem symptoms and measures ....... 172 mold proof operation ........64, 136 programme dry function ......... 60 multi system ............147 propeller fans removal of ............274 names of parts ............100 night set mode............63 radiation fin temperature rise ....... 208 reactor removal of ..........
  • Page 349 Si12-714 signal transmission error (between indoor and outdoor units) ..............186 wide-angle louvers ..........58 silicon grease ............315 wiring diagrams ............ 328 solenoid valve wiring-error check........... 91 removal of ........291, 307, 308 solenoid valve coil removal of ............305 sound blanket removal of ........266, 288, 304 specifications............14 SPM ................53 SW1 ..........36, 40, 42, 44, 49...
  • Page 350 Si12-714 Drawings & Flow Charts Numerics 3-D airflow ..............58 Hall IC check ............225 heating peak-cut control ........82 high pressure control in cooling ......199 anti-icing function in other rooms ......215 HOME LEAVE operation ........67 ARC433 ..............173 automatic air flow control ........59 automatic operation ..........61 indoor unit PCB abnormality .......
  • Page 351 Si12-714 4MXD80BVMA ..........327 CDK(X)D25/35/50/60CVMA ......321 unspecified voltage (between indoor and outdoor CDK(X)D25/35EAVMA ........321 units) ............ 188, 215 CDKD25/35/50/60CVM .........321 CDKD25/35EAVM .........321 FLK25AVMA ..........321 wiring diagrams FLK35AVMA ..........321 2MKD58DVM ..........331 FLK50AVMA8 ..........322 3MKD58/75DVM ........... 331 FLK60AVMA8 ..........322 3MKD75BVMA8 ..........331 FLX25AVMA ..........322 3MXD68BVMA8 ..........
  • Page 352 Specifications, designs and other content appearing in this brochure are current as of April 2007 but subject to change without notice. Si 12-714 Printed in Japan 04/2007 B AK...

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