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

Super multi nx d/e series
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Table of Contents

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See also: Service Manual
Si12 - 619A
D-Series / E-Series
[Applied Models]
Inverter Multi : Cooling Only
Inverter Multi : Heat Pump

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Do you have a question about the D-Series and is the answer not in the manual?

Questions and answers

Tan Richard
June 24, 2025

Which best port of the 4MKS80ESG should I connect for my FDKS35EAVMB

0
Rajesh Agrawal
May 22, 2025

Not cooling

User image 682ef6529d072
-1
1 comments:
Mr. Anderson
May 25, 2025

The Daikin D-Series may not be cooling properly due to the following reasons:

1. Refrigerant may be leaking.
2. There may be a refrigerant shortage.
3. The electronic expansion valve could be malfunctioning.
4. The outdoor unit fan may be faulty.
5. The outdoor unit PCB could be defective.
6. The stop valve may be defective.
7. The heat exchanger may be dirty.
8. The installation space may be insufficient, causing high-pressure control activation.
9. The system may not operate if room temperature is below 16°C.

If the unit is not cooling, contact a dealer or qualified technician for inspection and repair.

This answer is automatically generated

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Summary of Contents for Daikin D-Series

  • Page 1 Si12 - 619A D-Series / E-Series [Applied Models] Inverter Multi : Cooling Only Inverter Multi : Heat Pump...
  • Page 2 Si12-619A SUPER MULTI NX D-Series / E-Series Cooling Only Indoor Unit FTKS25DVM FDKS25CAVMB FFQ25B8V1B FTKS35DVM FDKS35CAVMB FFQ35B8V1B FTKS50BVMB FDKS50CVMB FFQ50B8V1B FTKS60BVMB FDKS60CVMB FFQ60B8V1B FTKS71BVMB FDKS25EAVMB FTKS20DVMA FDKS35EAVMB FTKS25EVMA CDKS25CVMA FTKS35EVMA CDKS35CVMA FTKS50FVM CDKS50CVMA FTKS60FVM CDKS60CVMA FTKS71FVM CDKS25DVMT FTKS50FVMA CDKS35DVMT FTKS60FVMA...
  • Page 3 Si12-619A Heat Pump Indoor Unit FTXS20DVMA FDXS25CVMA FLXS25BVMA FTXS25EVMA FDXS35CVMA FLXS35BVMA FTXS35EVMA FDXS50CVMA FLXS50BVMA FTXS50FVMA FDXS60CVMA FLXS60BVMA FTXS60FVMA CDXS25DVMT FVXS35BVMA FTXS71FVMA CDXS35DVMT FVXS50BVMA FTXS20DVMT CDXS50DVMT FFQ25B8V1B FTXS25DVMT CDXS60DVMT FFQ35B8V1B FTXS35DVMT CDXS25EAVMA FFQ50B8V1B FTXS50DVMT CDXS35EAVMA FFQ60B8V1B FTXS60DVMT CDXS25EAVMT FTXS71DVMT CDXS35EAVMT FTXS50FVLT FTXS60FVLT FTXS71FVLT Outdoor Unit...

  • Page 4: Table Of Contents

    Si12-619A 1. Introduction ................... vii 1.1 Safety Cautions ..................vii 1.2 Used Icons ....................xi Part 1 List of Functions ..............1 1. List of Functions ..................2 1.1 Cooling Only.....................2 1.2 Heat Pump .....................10 Part 2 Specifications ..............17 1. Specifications ..................18 1.1 Indoor Units - Cooling Only ..............18 1.2 Outdoor Units - Cooling Only ..............32 1.3 Indoor Units - Heat Pump...............38...
  • Page 5 Si12-619A 3.4 Discharge Pipe Temperature Control...........104 3.5 Input Current Control................104 3.6 Freeze-up Protection Control ...............105 3.7 Heating Peak-cut Control ..............105 3.8 Fan Control...................106 3.9 Liquid Compression Protection Function 2...........106 3.10 Defrost Control ..................107 3.11 Low Hz High Pressure Limit ..............108 3.12 Electronic Expansion Valve Control .............108 3.13 Malfunctions ..................112 3.14 Forced Operation Mode ...............113...
  • Page 6 Si12-619A 5.22 Thermistor or Related Abnormality (Outdoor Unit).......241 5.23 Electrical Box Temperature Rise............243 5.24 Radiation Fin Temperature Rise ............247 5.25 Output Over Current Detection.............251 5.26 Insufficient Gas..................253 5.27 Low-voltage Detection or Over-voltage Detection........257 5.28 Signal Transmission Error (on Outdoor Unit PCB).......258 5.29 Anti-icing Function in Other Rooms / Unspecified Voltage (between Indoor and Outdoor Units) ............259 6.
  • Page 7 Si12-619A Part 9 Appendix................. 359 1. Piping Diagrams..................360 1.1 Indoor Units ..................360 1.2 Outdoor Units ..................364 2. Wiring Diagrams..................370 2.1 Indoor Units ..................370 2.2 Outdoor Units ..................376 Index ..................... i Drawings & Flow Charts .............. vii Table of Contents...

  • Page 8: Introduction

    Si12-619A Introduction 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 9 Introduction Si12-619A 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 10 Si12-619A Introduction 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 11 Introduction Si12-619A 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 12: Used Icons

    Si12-619A Introduction 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 13 Introduction Si12-619A...

  • Page 14: Part 1 List Of Functions

    Si12-619A Part 1 List of Functions 1. List of Functions ..................2 1.1 Cooling Only.....................2 1.2 Heat Pump .....................10 List of Functions...

  • Page 15: List Of Functions

    List of Functions Si12-619A 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) — — Operation Limit for Heating (°CWB) —...
  • Page 16 Si12-619A 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 Si12-619A Category Functions Category Functions Basic Health & Inverter (with Inverter Power Control) Air Purifying Filter — — — Function Clean Operation Limit for Cooling (°CDB) — — — Photocatalytic Deodorizing Filter — — — Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
  • Page 18 Si12-619A 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 — — Operation Limit for Heating (°CWB) —...
  • Page 19 List of Functions Si12-619A 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 Si12-619A List of Functions Category Functions Category Functions Basic Health & Inverter (with Inverter Power Control) 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 Si12-619A Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter with Bacteriostatic & — — Function Clean Virustatic Functions –10 Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — — Operation Limit for Heating (°CWB) —...
  • Page 22 Si12-619A List of Functions 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 — — Operation Limit for Heating (°CWB) — —...

  • Page 23: Heat Pump

    List of Functions Si12-619A Heat Pump Category Functions Category Functions Basic Health & Inverter (with Inverter Power Control) Air Purifying Filter — — Function Clean Operation Limit for Cooling (°CDB) — — Photocatalytic Deodorizing Filter — — Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
  • Page 24 Si12-619A List of Functions Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter — — — Function Clean Operation Limit for Cooling (°CDB) — — — Photocatalytic Deodorizing Filter — — — Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
  • Page 25 List of Functions Si12-619A Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter — — Function Clean Photocatalytic Deodorizing Filter Operation Limit for Cooling (°CDB) — — — — Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
  • Page 26 Si12-619A List of Functions Category Functions Category Functions Basic Health & Air Purifying Filter — Inverter (with Inverter Power Control) Function Clean Photocatalytic Deodorizing Filter — Operation Limit for Cooling (°CDB) — Air Purifying Filter with Photocatalytic — Operation Limit for Heating (°CWB) —...
  • Page 27 List of Functions Si12-619A Category Functions Category Functions Basic Health & Air Purifying Filter Inverter (with Inverter Power Control) — Function Clean Operation Limit for Cooling (°CDB) — — — Photocatalytic Deodorizing Filter — Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
  • Page 28 Si12-619A List of Functions Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter — — Function Clean –5 –10 Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — — –15 –15 Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
  • Page 29 List of Functions Si12-619A 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 30: Part 2 Specifications

    Si12-619A Part 2 Specifications 1. Specifications ..................18 1.1 Indoor Units - Cooling Only ..............18 1.2 Outdoor Units - Cooling Only ..............32 1.3 Indoor Units - Heat Pump...............38 1.4 Outdoor Units - Heat Pump ..............48 Specifications...

  • Page 31: Specifications

    Specifications Si12-619A 1. Specifications Indoor Units - Cooling Only Wall Mounted Type 50Hz 230V Model FTKS25DVM FTKS35DVM Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color White White 8.7 (307) 8.9 (314) 6.7 (237) 6.9 (242) m³/min Air Flow Rates (cfm) 4.7 (166) 4.8 (169)
  • Page 32 Si12-619A Specifications 50Hz 230V Model FTKS71BVMB Rated Capacity 7.1kW Class Front Panel Color White 16.7 (590) 14.2 (501) m³/min Air Flow Rates (cfm) 11.6 (409) 10.6 (374) Type Cross Flow Fan Motor Output Speed Steps 5 Steps, Quiet, Auto Air Direction Control Right, Left, Horizontal, Downward Air Filter Removable-Washable-Mildew Proof...
  • Page 33 Specifications Si12-619A 50Hz 220-230-240V / 60Hz 220-230V Model FTKS35EVMA Rated Capacity 3.5kW Class Front Panel Color White 8.9 (314) 6.9 (244) m³/min Air Flow Rates (cfm) 4.8 (169) 4.0 (141) Type Cross Flow Fan Motor Output Speed Steps 5 Steps, Quiet, Auto Air Direction Control Right, Left, Horizontal, Downward Air Filter...
  • Page 34 Si12-619A Specifications 50Hz 230V Model FTKS71FVM Rated Capacity 7.1kW Class Front Panel Color White 17.4 (614) 14.6 (516) m³/min Air Flow Rates (cfm) 11.9 (420) 10.7 (378) Type Cross Flow Fan Motor Output Speed Steps 5 Steps, Quiet, Auto Air Direction Control Right, Left, Horizontal, Downward Air Filter Removable-Washable-Mildew Proof...
  • Page 35 Specifications Si12-619A 50Hz 220-230-240V / 60Hz 220-230V Model FTKS71FVMA Rated Capacity 7.1kW Class Front Panel Color White 17.4 (614) 14.6 (516) m³/min Air Flow Rates (cfm) 11.9 (420) 11.2 (395) Type Cross Flow Fan Motor Output Speed Steps 5 Steps, Quiet, Auto Air Direction Control Right, Left, Horizontal, Downward Air Filter...
  • Page 36 Si12-619A Specifications 60Hz 220V Model FTKS35DVMT FTKS50DVMT Capacity 3.5kW Class 5.0kW Class Front Panel Color White White 8.9 (314) 11.4 (402) 6.9 (244) 9.7 (342) m³/min Air Flow Rates (cfm) 4.8 (169) 8.0 (282) 4.0 (141) 7.1 (251) Type Cross Flow Fan Cross Flow Fan Motor Output Speed...
  • Page 37 Specifications Si12-619A 60Hz 220V Model FTKS60DVMT FTKS71DVMT Capacity 6.0kW Class 7.1kW Class Front Panel Color White White 16.2 (572) 16.7 (590) 13.6 (480) 14.2 (501) m³/min Air Flow Rates (cfm) 11.4 (402) 11.6 (409) 10.2 (360) 10.6 (374) Type Cross Flow Fan Cross Flow Fan Motor Output Speed...
  • Page 38 Si12-619A Specifications 60Hz 220V Model FTKS71FVLT Capacity 7.1kW Class Front Panel Color White 17.4 (614) 14.6 (516) m³/min Air Flow Rates (cfm) 11.6 (410) 10.6 (374) Type Cross Flow Fan Motor Output Speed Steps 5 Steps, Quiet, Auto Air Direction Control Right, Left, Horizontal, Downward Air Filter Removable / Washable / Mildew Proof...

  • Page 39: Duct Connected Type

    Specifications Si12-619A Duct Connected Type 50Hz 230V Model FDKS25CAVMB FDKS35CAVMB 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 40 Si12-619A Specifications 50Hz 230V Model FDKS25EAVMB FDKS35EAVMB 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 Sirocco Fan Motor Output...
  • Page 41 Specifications Si12-619A 50Hz 230V Model CDKS50CVMA CDKS60CVMA Rated Capacity 5.0kW Class 6.0kW Class — — Front Panel Color 12.0 (424) 16.0 (565) 11.0 (388) 14.8 (523) m³/min Air Flow Rates (cfm) 10.0 (353) 13.5 (477) 8.4 (297) 11.2 (395) Type Sirocco Fan Sirocco Fan Motor Output...
  • Page 42 Si12-619A Specifications 60Hz 220V Model CDKS50DVMT CDKS60DVMT Capacity 5.0kW Class 6.0kW Class — — Front Panel Color 12.0 (424) 16.0 (565) 11.0 (388) 14.8 (523) m³/min Air Flow Rates (cfm) 10.0 (353) 13.5 (477) 8.4 (297) 11.2 (395) Type Sirocco Fan Sirocco Fan Motor Output Speed...
  • Page 43 Specifications Si12-619A 60Hz 220V Model CDKS25EAVMT CDKS35EAVMT 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 Rate (cfm) 7.3 (258) 7.3 (258) 6.2 (219) 6.2 (219) Type Sirocco Fan Sirocco Fan Motor Output...
  • Page 44 Si12-619A Specifications Ceiling Mounted Cassette Type 50Hz 230V Model FFQ25B8V1B FFQ35B8V1B Rated Capacity 2.5kW Class 3.5kW Class Color White White Decoration Panel Dimensions (H×W×D) 55×700×700 55×700×700 9.0 (318) 10.0 (353) — — m³/min Air Flow Rates (cfm) 6.5 (230) 6.5 (230) —...

  • Page 45: Outdoor Units - Cooling Only

    Specifications Si12-619A Outdoor Units - Cooling Only 50Hz 230-240V Model 3MKS58EVMA 3MKS75EVMA — — Cooling Capacity — — Power Consumption — — Running Current Casing Color Ivory White Ivory White Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Compressor Model 2YC36BXD 2YC45BXD...
  • Page 46 Si12-619A Specifications 50Hz 220-230-240V / 60Hz 220-230V Model 4MKS90EVMA Cooling Capacity — — Power Consumption — Running Current Casing Color Ivory White Type Hermetically Sealed Swing Type Compressor Model 2YC63BXD Motor Output 1,920 Model FVC50K Refrigerant Oil Charge 0.75 Type R-410A Refrigerant Charge...
  • Page 47 Specifications Si12-619A 60Hz 220V Model 3MKS90EVLT 4MKS100EVLT Cooling Capacity — — Power Consumption — — Running Current — — Casing Color Ivory White Ivory White Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Compressor Model 2YC63BXD 2YC63BXD Motor Output 1,920 1,920 Model...
  • Page 48 Si12-619A Specifications 50Hz 230V Model 3MKS50DVM 4MKS71DVM Cooling Capacity — — Power Consumption — — Running Current — — Casing Color Ivory White Ivory White Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Compressor Model 2YC32HXD 2YC45BXD Motor Output 1,380 Model FVC50K...
  • Page 49 Specifications Si12-619A 50Hz 230V Model 3MKS50ESG 3MKS71ESG Cooling Capacity — — — — Power Consumption — — Running Current Casing Color Ivory White Ivory White Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Compressor Model 2YC36BXD 2YC45BXD Motor Output 1,100 1,380 Model...
  • Page 50 Si12-619A Specifications 50Hz 230V Model 4MKS80ESG Cooling Capacity — Power Consumption — Running Current — Casing Color Ivory White Type Hermetically Sealed Swing Type Compressor Model 2YC63BXD#D Motor Output 1,920 Model FVC50K Refrigerant Oil Charge 0.75 Type R-410A Refrigerant Charge 54.5 m³/min 46.0...

  • Page 51: Indoor Units - Heat Pump

    Specifications Si12-619A Indoor Units - Heat Pump Wall Mounted Type 50Hz 220-230-240V / 60Hz 220-230V FTXS20DVMA FTXS25EVMA Model Cooling Heating Cooling Heating Rated Capacity 2.0kW Class 2.5kW Class Front Panel Color White White 8.7 (307) 9.4 (332) 8.7 (307) 9.4 (332) 6.7 (237) 7.6 (268) 6.7 (237)
  • Page 52 Si12-619A Specifications 50Hz 220-230-240V / 60Hz 220-230V FTXS60FVMA FTXS71FVMA Model Cooling Heating Cooling Heating Rated Capacity 6.0kW Class 7.1kW Class Front Panel Color White White 16.2 (572) 17.4 (614) 17.4 (614) 21.5 (759) 13.9 (491) 15.3 (540) 14.6 (516) 18.0 (636) m³/min Air Flow Rates (cfm)
  • Page 53 Specifications Si12-619A 60Hz 220V FTXS35DVMT FTXS50DVMT Model Cooling Heating Cooling Heating Capacity 3.5kW Class 5.0kW Class Front Panel Color White White 8.9 (314) 9.7 (342) 11.4 (402) 12.6 (445) 6.9 (244) 7.9 (279) 9.7 (342) 10.8 (381) m³/min Air Flow Rates (cfm) 4.8 (169) 6.0 (212)
  • Page 54 Si12-619A Specifications 60Hz 220V FTXS50FVLT FTXS60FVLT Model Cooling Heating Cooling Heating Capacity 5.0kW Class 6.0kW Class Front Panel Color White White 14.7 (519) 16.1 (569) 16.2 (572) 17.4 (614) 12.4 (438) 13.9 (491) 13.6 (480) 15.1 (533) m³/min Air Flow Rates (cfm) 10.3 (364) 11.5 (406)
  • Page 55 Specifications Si12-619A Duct Connected Type 50Hz 220-230-240V / 60Hz 220-230V FDXS25CVMA FDXS35CVMA Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class — — Front Panel Color 9.5 (335) 9.5 (335) 10.0 (353) 10.0 (353) 8.8 (311) 8.8 (311) 9.3 (328) 9.3 (328) m³/min...
  • Page 56 Si12-619A Specifications 60Hz 220V CDXS25DVMT CDXS35DVMT Model Cooling Heating Cooling Heating Capacity 2.5kW Class 3.5kW Class — — Front Panel Color 9.5 (335) 10.0 (353) 8.8 (311) 9.3 (328) m³/min Air Flow Rates (cfm) 8.0 (282) 8.5 (300) 6.7 (237) 7.0 (247) Type Sirocco Fan...
  • Page 57 Specifications Si12-619A 50Hz 220-230-240V / 60Hz 220-230V CDXS25EAVMA CDXS35EAVMA 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 58 Si12-619A Specifications Floor / Ceiling Suspended Dual Type 50Hz 230V FLXS25BVMA FLXS35BVMA Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color Almond White Almond White 7.6 (268) 9.2 (325) 8.6 (304) 9.8 (346) 6.8 (240) 8.3 (293) 7.6 (268) 8.9 (314)

  • Page 59: Floor Standing Type

    Specifications Si12-619A Floor Standing Type 50Hz 220-230-240V / 60Hz 220-230V FVXS35BVMA FVXS50BVMA Model Cooling Heating Cooling Heating Rated Capacity 3.5kW Class 5.0kW Class Front Panel Color Almond White Almond White 8.3 (293) 9.2 (325) 10.8 (381) 13.2 (466) 6.3 (222) 7.1 (251) 9.2 (325) 11.3 (399)
  • Page 60 Si12-619A Specifications 50Hz 240V FFQ50B8V1B FFQ60B8V1B Model Cooling Heating Cooling Heating Rated Capacity 5.0kW Class 6.0kW Class Color White White Decoration Panel Dimensions (H×W×D) 55×700×700 55×700×700 13.0 (459) 13.0 (459) 15.5 (547) 15.5 (547) — — — — m³/min Air Flow Rates (cfm) 8.0 (283) 8.0 (283)

  • Page 61: Outdoor Units - Heat Pump

    Specifications Si12-619A Outdoor Units - Heat Pump 50Hz 230-240V 3MXS52EVMA 3MXS68EVMA Model Cooling Heating Cooling Heating — — Cooling Capacity — — Power Consumption — — Running Current Casing Color Ivory White Ivory White Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Compressor Model 2YC36BXD...
  • Page 62 Si12-619A Specifications 50Hz 220-230-240V / 60Hz 220-230V 4MXS80EVMA Model Cooling Heating — Cooling Capacity Power Consumption — — Running Current Casing Color Ivory White Type Hermetically Sealed Swing Type Compressor Model 2YC63BXD Motor Output 1,920 Model FVC50K Refrigerant Oil Charge 0.75 Type R-410A...
  • Page 63 Specifications Si12-619A 60Hz 220V 3MXS90EVLT 4MXS100EVLT Model Cooling Heating Cooling Heating — — Cooling Capacity Power Consumption — — — — Running Current Casing Color Ivory White Ivory White Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Compressor Model 2YC63BXD 2YC63BXD Motor Output...

  • Page 64: Part 3 Printed Circuit Board Connector Wiring Diagram

    Si12-619A Part 3 Printed Circuit Board Connector Wiring Diagram 1. Printed Circuit Board Connector Wiring Diagram.........52 1.1 Wall Mounted Type ................52 1.2 Duct Connected Type................56 1.3 Floor / Ceiling Suspended Dual Type.............58 1.4 Floor Standing Type ................61 1.5 Ceiling Mounted Cassette Type (600×600)..........64 1.6 Outdoor Units –...

  • Page 65: Printed Circuit Board Connector Wiring Diagram

    Printed Circuit Board Connector Wiring Diagram Si12-619A 1. Printed Circuit Board Connector Wiring Diagram Wall Mounted Type 1.1.1 FTK(X)S 25/35 E, FTK(X)S 20~35 D Connectors PCB(1) (Control PCB) Connector for DC fan motor Connector for swing motor (horizontal blades) Connector for centralized control (HA) Connector for display PCB...
  • Page 66 Si12-619A Printed Circuit Board Connector Wiring Diagram PCB Detail PCB(1): Control PCB (indoor unit) LED A (R4288) PCB(2): Signal Receiver PCB PCB(3): Display PCB LED1 LED2 LED3 RTH1 (R4289) (R4290) PCB(4): INTELLIGENT EYE sensor PCB (R4291) Printed Circuit Board Connector Wiring Diagram...
  • Page 67 Printed Circuit Board Connector Wiring Diagram Si12-619A 1.1.2 FTK(X)S 50~71F, FTK(X)S 50~71 D, FTKS 50~71 B 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...

  • Page 68: Display Pcb

    Si12-619A 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 69: Duct Connected Type

    Printed Circuit Board Connector Wiring Diagram Si12-619A 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 70 Si12-619A Printed Circuit Board Connector Wiring Diagram PCB Detail PCB (2): Display PCB Printed Circuit Board Connector Wiring Diagram...

  • Page 71: Floor / Ceiling Suspended Dual Type

    Printed Circuit Board Connector Wiring Diagram Si12-619A 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 72 Si12-619A 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 73 Printed Circuit Board Connector Wiring Diagram Si12-619A PCB (3): Display PCB PCB (4): Signal Receiver PCB EX511 REV 12 PHOTO 2P084377- 1 S31(RTH) (R4977) Printed Circuit Board Connector Wiring Diagram...

  • Page 74: Floor Standing Type

    Si12-619A Printed Circuit Board Connector Wiring Diagram Floor Standing Type Connectors PCB(1) (Power Supply PCB) 1) S8, S202, Connector for control PCB S204 PCB(2) (Control PCB) Connector for swing motor and lower air outlet motor Connector for centralized control Connector for display PCB S31, S32 Connector for room temperature / heat exchanger thermistor S7, S201,...
  • Page 75 Printed Circuit Board Connector Wiring Diagram Si12-619A PCB Detail PCB (1): Power Supply PCB (35 class) PCB Detail PCB (1): Power Supply PCB (50 class) Printed Circuit Board Connector Wiring Diagram...
  • Page 76 Si12-619A Printed Circuit Board Connector Wiring Diagram PCB Detail PCB (2): Control PCB (indoor unit) PCB (3): Display PCB PCB (4): Signal Receiver PCB Printed Circuit Board Connector Wiring Diagram...

  • Page 77: Ceiling Mounted Cassette Type (600×600)

    Printed Circuit Board Connector Wiring Diagram Si12-619A Ceiling Mounted Cassette Type (600×600) Connectors PCB(1)(Control PCB [A1P]) Connector for terminal strip (for wired remote controller) 2) X10A, X11A Connector for transformer X15A Connector for float switch 4) X17A, X18A Connector for heat exchanger thermistor X19A Connector for room temperature thermistor X20A...
  • Page 78 Si12-619A Printed Circuit Board Connector Wiring Diagram PCB Detail PCB(1): Control PCB (A1P) (indoor unit) X20A X25A X27A X11A X10A X33A X18A Capacity setting adaptor X19A X61A X60A X36A X40A (Service monitor LED) X17A X15A 2P095006 X24A X35A Printed Circuit Board Connector Wiring Diagram...
  • Page 79 Printed Circuit Board Connector Wiring Diagram Si12-619A PCB Detail PCB(2): Signal Receiver PCB (A3P) (R4873) PCB(3): Display PCB (A4P) LED4 LED3 LED2 LED1 (R4874) Printed Circuit Board Connector Wiring Diagram...

  • Page 80: Outdoor Units - E Series (50-58 Class, 80-100 Class)

    Si12-619A Printed Circuit Board Connector Wiring Diagram Outdoor Units – E Series (50-58 Class, 80-100 Class) Connectors PCB(1)(Main PCB) Connector for terminal strip (indoor-outdoor transmission) Connector for COOL / HEAT mode lock Connector for electronic expansion valve coil A port (white) Connector for electronic expansion valve coil B port (red) Connector for electronic expansion valve coil C port (blue) Connector for electronic expansion valve coil D port (yellow)
  • Page 81 Printed Circuit Board Connector Wiring Diagram Si12-619A PCB Detail PCB(1): Main PCB (50-58 class models) FU2(3.15A) (30A) S101 FU3(3.15A) (R6041) PCB(1): Main PCB (80-100 class models) FU2(3.15A) V100 (30A) S101 FU3(3.15A) (R6060) Printed Circuit Board Connector Wiring Diagram...
  • Page 82 Si12-619A Printed Circuit Board Connector Wiring Diagram PCB(2): Service Monitor PCB Printed Circuit Board Connector Wiring Diagram...

  • Page 83: Outdoor Units - E Series (68-75 Class)

    Printed Circuit Board Connector Wiring Diagram Si12-619A Outdoor Units – E Series (68-75 Class) Connectors Control PCB Connector for terminal strip (indoor - outdoor transmission) 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 CN14 on SPM Connector for CN11 on SPM...
  • Page 84 Si12-619A Printed Circuit Board Connector Wiring Diagram CN11 Connector for S32 on PCB CN14 Connector for S31 on PCB L1, L2 Connector for reactor PCB Detail PCB (1): Control PCB (outdoor unit) PCB (2): Service monitor PCB S102 LED A LED 1 LED 2 LED 3...
  • Page 85 Printed Circuit Board Connector Wiring Diagram Si12-619A Inverter PCB (MID2) FU201 (3.15A) 3P080085 CN14 CN11 3EB10032 Printed Circuit Board Connector Wiring Diagram...

  • Page 86: Outdoor Units - D Series

    Si12-619A Printed Circuit Board Connector Wiring Diagram Outdoor Units – D Series 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 87 Printed Circuit Board Connector Wiring Diagram Si12-619A CN11 Connector for S32 on PCB CN14 Connector for S31 on PCB L1, L2 Connector for reactor PCB Detail PCB (1): Control PCB (outdoor unit) PCB (2): Service monitor PCB S102 LED A LED 1 LED 2 LED 3...
  • Page 88 Si12-619A Printed Circuit Board Connector Wiring Diagram Inverter PCB (MID2) FU201 (3.15A) 3P080085 CN14 CN11 3EB10032 Printed Circuit Board Connector Wiring Diagram...
  • Page 89 Printed Circuit Board Connector Wiring Diagram Si12-619A Printed Circuit Board Connector Wiring Diagram...

  • Page 90: Part 4 Function And Control

    Si12-619A Part 4 Function and Control 1. Main Functions..................78 1.1 Frequency Principle................78 1.2 Power-Airflow Dual Flaps, Wide Angle Louvers and Auto-Swing ..80 1.3 Fan Speed Control for Indoor Units............81 1.4 Programme Dry Function ...............82 1.5 Automatic Operation................83 1.6 Thermostat Control.................84 1.7 Night Set Mode..................85 1.8 ECONO Mode ..................86 1.9 MOLD PROOF Operation ..............87...

  • Page 91: Main Functions

    Main Functions Si12-619A 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 92 Si12-619A 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 93: Power-Airflow Dual Flaps, Wide Angle Louvers And Auto-Swing

    Main Functions Si12-619A 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 94: Fan Speed Control For Indoor Units

    Si12-619A 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 95: Programme Dry Function

    Main Functions Si12-619A 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 96: Automatic Operation

    Si12-619A 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 97: Thermostat Control

    Main Functions Si12-619A 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 98: Night Set Mode

    Si12-619A 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 99: Econo Mode

    Main Functions Si12-619A ECONO Mode Outline FTK(X)S20-35D, FTK(X)S25/35E 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 100: Mold Proof Operation

    Si12-619A Main Functions MOLD PROOF Operation FTK(X)S20-35D, FTK(X)S25/35E MOLD PROOF operation is a function which reduces the spread of mold by using Fan mode to lower the humidity inside the indoor unit. Outline MOLD PROOF operation starts when the following conditions are met. 1.

  • Page 101: Intelligent Eye (Wall Mounted Type Only)

    Main Functions Si12-619A 1.10 INTELLIGENT EYE (Wall Mounted Type Only) 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 102 Si12-619A Main Functions 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 103: Home Leave Operation

    Main Functions Si12-619A 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 104: Inverter Powerful Operation

    Si12-619A Main Functions 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 105: Other Functions

    Main Functions Si12-619A 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 106 Si12-619A Main Functions 1.13.6 Air-Purifying Filter For FLXS25-60B, FVXS35/50B 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 FTKS50-71B, FTK(X)S50-71D This filter incorporates the benefits the Air Purifying Filter and Photocatalytic Deodorizing Filter in a single unit.

  • Page 107: Function Of Main Structural Parts

    Function of Main Structural Parts Si12-619A 2. Function of Main Structural Parts Main Structural Parts Heat Pump Model Expansion valve Four way valve (R4595) Compressor Cooling Only Model Expansion valve Compressor (R4596) Note: Expansion Valve : In Case of 2 port model..EVA-B, 3 port model..EVA-C, 4 port model..EVA-D Function and Control...

  • Page 108: Function Of Thermistor

    Si12-619A Function of Main Structural Parts Function of Thermistor 2.2.1 Heat Pump Model Expansion 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 109 Function of Main Structural Parts Si12-619A 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 110: Cooling Only Model

    Si12-619A Function of Main Structural Parts 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 111 Function of Main Structural Parts Si12-619A 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 112: Control Specification

    Si12-619A Control Specification 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 113: Frequency Control

    Control Specification Si12-619A 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 114 Si12-619A Control Specification 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 115 Control Specification Si12-619A 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 116: Controls At Mode Changing / Start-Up

    Si12-619A Control Specification 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 117: Discharge Pipe Temperature Control

    Control Specification Si12-619A 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 118: Freeze-Up Protection Control

    Si12-619A Control Specification 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 119: Fan Control

    Control Specification Si12-619A 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 120: Defrost Control

    Si12-619A Control Specification 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 Under the conditions that the system is in heating operation, 6 minutes after the compressor is started and more than 38 minutes of accumulated time pass since the start of the operation or ending the defrosting.

  • Page 121: Low Hz High Pressure Limit

    Control Specification Si12-619A 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 122 Si12-619A Control Specification 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 123 Control Specification Si12-619A 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 124 Si12-619A Control Specification 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 125: Malfunctions

    Control Specification Si12-619A 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 126: Forced Operation Mode

    Si12-619A Control Specification 3.13.4 Preventing Indoor Freezing During cooling, if the heat exchanger temperature in the operation stopped room becomes below the specified temperature for the specified time, open the electronic expansion valve in the operation stopped room as specified, and carry out the fully closed operation. After this, if freezing abnormality occurs more than specified time, the system shall be down as the system abnormality.

  • Page 127: Wiring-Error Check

    Control Specification Si12-619A 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 128 Si12-619A Control Specification 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 129: Additional Function

    Control Specification Si12-619A 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 130 Si12-619A Control Specification 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 131 Control Specification Si12-619A Function and Control...

  • Page 132: Part 5 Operation Manual

    Si12-619A Part 5 Operation Manual 1. System Configuration................120 1.1 Operation Instructions ................120 2. Instruction....................121 2.1 FTK(X)S, CDK(X)S, FDK(X)S, FLXS, FVXS Series......121 2.2 FFQ 25/35/50/60 B................189 Operation Manual...

  • Page 133: System Configuration

    System Configuration Si12-619A 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 134: Instruction

    Si12-619A Instruction 2. Instruction FTK(X)S, CDK(X)S, FDK(X)S, FLXS, FVXS Series 2.1.1 Manual Contents and Reference Page Wall Mounted Type Model Series FTK(X)S20/25/35D FTK(X)S50/60/71D FTK(X)S50/60/71F FTK(X)S25/35E FTKS50/60/71B Read before Operation Safety Precautions Names of Parts Preparation before Operation ★ 1 Operation AUTO, DRY, COOL, HEAT, FAN Operation ★...

  • Page 135: 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 136: Installation Site

    Si12-619A 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 137 Instruction Si12-619A 2.1.3 Names of Parts FTK(X)S 20/25/35 D, FTK(X)S 25/35 E Names of parts Indoor Unit ON/OFF Operation Manual...

  • Page 138: Outdoor Unit

    Si12-619A Instruction Outdoor Unit Indoor Unit 1. Air filter 12. Indoor Unit ON/OFF switch: • Push this switch once to start operation. 2. Titanium Apatite Photocatalytic Push once again to stop it. Air-Purifying Filter: • The operation mode refers to the following •...

  • Page 139: Remote Controller

    Instruction Si12-619A Remote Controller ECONO ON/OFF TEMP POWERFUL MODE SWING MOLD PROOF SENSOR CANCEL TIMER < > ARC433B46, B47 1. Signal transmitter: 8. QUIET button: OUTDOOR UNIT QUIET • It sends signals to the indoor unit. operation 9. FAN setting button: 2.
  • Page 140 Si12-619A Instruction FTK(X)S 50/60/71 F Names of parts ■ Indoor Unit Operation Manual...
  • Page 141 Instruction Si12-619A ■ Outdoor Unit 50/60 class 71/80/90 class ■ 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.
  • Page 142 Si12-619A Instruction ■ Remote Controller QUIET CANCEL TIMER < > ARC433B70, B71 1. Signal transmitter: 8. QUIET button: OUTDOOR UNIT QUIET operation • It sends signals to the indoor unit. 9. FAN setting button: 2. Display: • It selects the air flow rate setting. •...

  • Page 143: Names Of Parts

    Instruction Si12-619A FTK(X)S 50/60/71 D, FTKS 50/60/71 B Names of parts Indoor Unit Main unit control panel Operation Manual...
  • Page 144 Si12-619A Instruction Outdoor Unit Indoor Unit 1. Air filter 14. Indoor Unit ON/OFF switch: • Push this switch once to start operation. 2. Air purifying filter with photocatalytic Push once again to stop it. deodorizing function: • The operation mode refer to the following table. •...
  • Page 145 Instruction Si12-619A Remote Controller < > ARC433B70, B71 1. Signal transmitter: 9. FAN setting button: • It sends signals to the indoor unit. • It selects the air flow rate setting. 2. Display: 10. SENSOR button: for INTELLIGENT EYE • It displays the current settings. operation (In this illustration, each section is shown with all 11.
  • Page 146 Si12-619A Instruction Duct Connected Type Names of parts Indoor Unit Operation Manual...
  • Page 147 Instruction Si12-619A 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 148 Si12-619A 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 (In this illustration, each section is shown QUIET operation with all its displays ON for the purpose of...
  • Page 149 Instruction Si12-619A Floor/Ceiling Suspended Dual Type Names of parts Indoor Unit The indoor unit can be installed either to the ceiling or to a wall. The descriptions contained in this man- ual show the case when installation is being carried out to the ceiling. (The methods of operation used are the same when installing to a wall.) Opening the front grille How to open the front grille :...
  • Page 150 Si12-619A Instruction Outdoor Unit ■ Indoor Unit 1. Louvers (vertical blades): 13. Indoor unit ON/OFF switch: The louvers are inside of the air outlet. • Push this switch once to start operation. 2. Air outlet Push once again to stop it. •...
  • Page 151 Instruction Si12-619A Remote Controller HOME LEAVE ON/OFF TEMP POWERFUL MODE SWING QUIET CANCEL TIMER < > ARC433B67 1. Signal Transmitter: 7. MODE selector button: • It sends signals to the indoor unit. • It selects the operation mode. (AUTO/DRY/COOL/HEAT/FAN) 2. Display: •...
  • Page 152 Si12-619A Instruction Floor Standing Type Names of parts Indoor Unit O F F Opening the front grille How to open the grille: Air outlet selection switch 12 13 • This setting blows air from upper outlet only. This setting automatically decides a blow •...
  • Page 153 Instruction Si12-619A Outdoor Unit Indoor Unit 1. Photocatalytic deodorizing filter and • The operation mode refers to the following Air purifying filter: table. • These filters are attached to the inside of the air Temperature Air flow Mode filters. setting rate 2.
  • Page 154 Si12-619A Instruction Remote Controller HOME LEAVE ON/OFF TEMP POWERFUL MODE SWING SILENT CANCEL TIMER < > ARC433A5 1. Signal transmitter: • It selects the operation mode. • It sends signals to the indoor unit. (AUTO/DRY/COOL/HEAT/FAN) 2. Display: 8. SILENT button: for OUTDOOR UNIT •...

  • Page 155: Preparation Before Operation

    Instruction Si12-619A 2.1.4 Preparation Before Operation Preparation Before Operation To set the batteries Position + and – correctly! 1. Slide the front cover to take it off. 2. Set two dry batteries (AAA). 3. Set the front cover as before. ATTENTION About batteries •...
  • Page 156 Si12-619A 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 157 Instruction Si12-619A To set the clock 1. Press “CLOCK button”. is displayed. blinks. 2. Press “TIMER setting button” to set the clock to the present time. ECONO ON/OFF Holding down “ ” or “ ” button rap- TEMP POWERFUL idly increases or decreases the time dis- play.
  • Page 158 Si12-619A Instruction 2.1.5 AUTO · DRY · COOL · HEAT · FAN Operation 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 159: To Change The Air Flow Rate Setting

    Instruction Si12-619A ■ To change the air flow rate setting 5. Press “FAN setting button”. DRY mode AUTO or HEAT or COOL or FAN mode Five levels of air flow rate setting from “ ” to “ ” plus “ ”...

  • Page 160: Adjusting The Air Flow Direction

    Si12-619A Instruction 2.1.6 Adjusting the Air Flow Direction FTK(X)S 20 D, FTK(X)S 25/35 D(E) Adjusting the Air Flow Direction You can adjust the air flow direction to increase your com- fort. To adjust the horizontal blades (flaps) 1. Press “SWING button”. •...
  • Page 161 Instruction Si12-619A To adjust the vertical blades (louvres) Hold the knob and move the louvres. (You will find a knob on the left-side and the right-side blades.) • When the unit is installed in the corner of a room, the direction of the louvers should be facing away from the wall.
  • Page 162 Si12-619A Instruction FTK(X)S 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 163 Instruction Si12-619A 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 164 Si12-619A Instruction FLXS 25/35/50/60 B Adjusting the Air Flow Direction You can adjust the air flow direction to increase your com- fort. To adjust the horizontal blade (flap) 1. Press “SWING button”. • “ ” is displayed on the LCD. 2.
  • Page 165 Instruction Si12-619A To adjust the vertical blades (louvers) • When adjusting the louver, use a robust and stable stool and watch your steps carefully. Hold the knob and move the louvers. (You will find a knob on the left side and the right side blades.) Notes on flap and louvers angles •...
  • Page 166 Si12-619A Instruction Floor Standing Type Adjusting the Air Flow Direction You can adjust the air flow direction to increase your com- fort. To adjust the horizontal blade (flap) 1. Press “SWING button”. • “ ” is displayed on the LCD. 2.

  • Page 167: Air Flow Selection

    Instruction Si12-619A Air flow selection • Make air flow selection according to what suits you. When setting the air flow selection switch to • Air conditioner automatically decides the appropriate blowing pattern depending on the operating mode/situation. Operating mode Situation Blowing pattern •...

  • Page 168: Powerful Operation

    Si12-619A Instruction 2.1.7 POWERFUL Operation POWERFUL Operation POWERFUL operation quickly maximizes the cooling (heating) effect in any operation mode. You can get the maximum capacity . To start POWERFUL operation 1. Press “POWERFUL button”. • POWERFUL operation ends in 20 minutes. Then the system automatically operates again with the settings which were used ECONO...

  • Page 169: Outdoor Unit Quiet Operation

    Instruction Si12-619A 2.1.8 OUTDOOR UNIT QUIET Operation OUTDOOR UNIT QUIET Operation OUTDOOR UNIT QUIET operation lowers the noise level of the outdoor unit by changing the frequency and fan speed on the outdoor unit. T his function is convenient during night. To start OUTDOOR UNIT QUIET operation 1.

  • Page 170: Econo Operation

    Si12-619A Instruction 2.1.9 ECONO Operation ECONO Operation ECONO operation is a function which enables efficient operation by lowering the maximum power con- sumption value. To start ECONO operation 1. Press “ECONO button” . • “ ” is displayed on the LCD. To cancel ECONO opera- tion 2.
  • Page 171 Instruction Si12-619A 2.1.10 MOLD PROOF Operation MOLD PROOF Operation MOLD PROOF operation is a function which reduces the spread of mold by using Fan mode to lower the humidity inside the indoor unit. To set MOLD PROOF operation 1. Press and hold the MOLD PROOF button for two seconds.
  • Page 172 Si12-619A Instruction 2.1.11 HOME LEAVE Operation HOME LEAVE Operation HOME LEAVE operation is a function which allows you to record your preferred temperature and air flow rate settings. ■ To start HOME LEAVE operation 1. Press “HOME LEAVE button”. • “ ”...
  • Page 173 Instruction Si12-619A ■ 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 174: Intelligent Eye Operation

    Si12-619A Instruction 2.1.12 INTELLIGENT EYE Operation FTK(X)S 20/25/35 D, FTK(X)S 25/35 E 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 175 Instruction Si12-619A “INTELLIGENT EYE” is useful for Energy Saving Energy saving operation • Change the temperature –2 ° C in heating / +2 ° C in cooling / +2 ° C in dry mode from set temperature. • Decrease the air flow rate slightly in fan operation. (In FAN mode only) Notes on “INTELLIGENT EYE”...
  • Page 176 Si12-619A Instruction FTK(X)S 50/60/71 F, FTKS 50/60/71 B INTELLIGENT EYE Operation “INTELLIGENT EYE” is the infrared sensor which detects the human movement. ■ To start INTELLIGENT EYE operation 1. Press “SENSOR button”. • “ ” is displayed on the LCD. ■...
  • Page 177 Instruction Si12-619A “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 178: Timer Operation

    Si12-619A Instruction 2.1.13 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 op era- tion •...
  • Page 179 Instruction Si12-619A To use ON TIME R 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 180: Note For Multi System

    Si12-619A Instruction 2.1.14 Note for Multi System Note for Multi System 〈〈 〉〉 What is a “Multi System”? This system has one outdoor unit connected to multiple indoor units. Selecting the Operation Mode room room Outdoor unit 1. With the Priority Room Setting room room present but inactive or not present.

  • Page 181: Priority Room Setting

    Instruction Si12-619A 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 182: Care And Cleaning

    Si12-619A Instruction 2.1.15 Care and Cleaning FTK(X)S 20 D, FTK(X)S 25/35 E Care and Cleaning Before cleaning, be sure to stop the operation and CAUTION turn the breaker OFF. Units ■ Indoor unit, Outdoor unit and Remote controller 1. Wipe them with dry soft cloth. ■...

  • Page 183: Air Filter

    Instruction Si12-619A Filters 1. Open the front panel. 2. Pull out the air filters. • Push a little upwards the tab at the center of each air filter, then pull it down. 3. Take off the Titanium Apatite Photo- catalytic Air-Purifying Filter. •...

  • Page 184: Before A Long Idle Period

    Si12-619A Instruction NOTE • Operation with dirty filters: (1) cannot deodorize the air. (2) cannot clean the air. (3) results in poor heating or cooling. (4) may cause odour. • To order Titanium Apatite Photocatalytic Air-Purifying Filter contact to the service shop there you bought the air conditioner.
  • Page 185 Instruction Si12-619A FTK(X)S 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.
  • Page 186 Si12-619A 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 at top) Apatite Photocatalytic Air-Purifying Filter.
  • Page 187 Instruction Si12-619A 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 188: Front Grille

    Si12-619A Instruction FTK(X)S 50/60/71 D, FTKS 50/60/71 B CARE Care and Cleaning Before cleaning, be sure to stop the operation and CAUTION turn the breaker OFF. Units ■ Indoor unit, Outdoor unit and Remote controller 1. Wipe them with dry soft cloth. ■...
  • Page 189 Instruction Si12-619A 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 with photocatalytic deodorizing function.
  • Page 190 Si12-619A Instruction Check Check that the base, stand and other fittings of the outdoor unit are not decayed or corroded. Check that nothing blocks the air inlets and the outlets of the indoor unit and the outdoor unit. Check that the drain comes smoothly out of the drain hose during COOL or DRY operation. •...

  • Page 191: Cleaning The Air Filter

    Instruction Si12-619A Duct Connected Type Care and Cleaning • Only a qualified service person is allowed to CAUTION perform maintenance. • Before cleaning, be sure to stop the operation and turn the breaker OFF. Cleaning the air filter 1.Removing the air filter. •...
  • Page 192 • Clean the drain pan periodically, or drain piping may be clogged with dust and may result in water leakage. Ask your DAIKIN dealer to clean them. • Prepare a cover locally to prevent any dust in the air around the indoor unit from getting in the drain pan, if there is a great deal of dust present.
  • Page 193 Instruction Si12-619A Floor/Ceiling Suspended Dual Type 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 194 Si12-619A 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 195 Instruction Si12-619A Check Check that the base, stand and other fittings of the outdoor unit are not decayed or corroded. Check that nothing blocks the air inlets and the outlets of the indoor unit and the outdoor unit. Check that the drain comes smoothly out of the drain hose during COOL or DRY operation. •...
  • Page 196 Si12-619A Instruction Floor Standing Type Care and Cleaning Before cleaning, be sure to stop the operation and CAUTION turn the breaker OFF. Units Indoor unit, Outdoor unit and Remote controller 1. Wipe them with dry soft cloth. Front grille 1. Open the front grille. •...
  • Page 197 Instruction Si12-619A Filters 1. Open the front grille. 2. Remove the air filter. • Press the claws on the right and left of the air filter down slightly, then pull upward. 3. Take off the air purifying filter, Photocatalytic deodorizing filter. •...
  • Page 198 Si12-619A Instruction Check Check that the base, stand and other fittings of the outdoor unit are not decayed or corroded. Check that nothing blocks the air inlets and the outlets of the indoor unit and the outdoor unit. Check that the drain comes smoothly out of the drain hose during COOL or DRY operation. •...

  • Page 199: Trouble Shooting

    Instruction Si12-619A 2.1.16 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 200 Si12-619A 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 201 Instruction Si12-619A Call the service shop immediately. WARNING When an abnormality (such as a burning smell) occurs, stop operation and turn the breaker OFF. Continued operation in an abnormal condition may result in troubles, electric shocks or fire. Consult the service shop where you bought the air conditioner. Do not attempt to repair or modify the air conditioner by yourself.

  • Page 202: Ffq 25/35/50/60 B

    Si12-619A Instruction FFQ 25/35/50/60 B TEST AVAILABLE TEST Operation Manual...
  • Page 203 (In case of group control system, one group of indoor units) The unit is individually operated. Outdoor unit NOTE • Contact your Daikin dealer in case of changing Unit with Unit with the combination or setting of group control and remote remote two remote controllers control system.

  • Page 204: Safety Considerations

    Si12-619A Instruction the level of limiting concentration, an oxygen defi- 2. SAFETY CONSIDERATIONS ciency accident may happen. For installation of separately sold component We recommend that you read this instruction man- parts, ask a specialist. ual carefully before use to gain full advantage of the Be sure to use the separately sold component function of the air conditioner, and to avoid malfunc- parts designated by our company.

  • Page 205: Operation Range

    Instruction Si12-619A DB: Dry bulb temperature (˚C) Do not expose animals and plants directly to the wind from the air conditioner. WB: Wet bulb temperature (˚C) Adverse influence to animals and plants may The setting temperature range of the remote con- ˚...

  • Page 206: Operation Procedure

    • Operating procedure varies with heat pump type DISPLAY “ ” (AIR FLOW FLAP) and cooling only type. Contact your Daikin dealer Refer to “AIR FLOW DIRECTION ADJUST”. to confirm your system type. • To protect the unit, turn on the main power switch 6 hours before operation.
  • Page 207 • The heating capacity of the air conditioner • The movable limit of the flap is changeable. declines as the outside air temperature falls. Contact your Daikin dealer for details. In such a case, use the air conditioner in combi- nation with other heating systems.

  • Page 208: Optimum Operation

    Si12-619A Instruction Press the AIR FLOW DIRECTION ADJUST button to select the air direction as following. PROGRAMMING TIME The AIR FLOW FLAP display swings as shown left and the Press the PROGRAMMING TIME button and air flow direction continuously set the time for stopping or starting the sys- varies.
  • Page 209 Instruction Si12-619A • Do not place other heaters directly below the Fig. 1 indoor unit. They may deform due to the heat. • Never place objects near the air inlet and the air outlet of the unit. It may cause deterioration in the effect or stop in the operation.

  • Page 210: Air Conditioner

    Si12-619A Instruction 5. Shut the suction grille. Directly apply the type of detergent used for Refer to item No.1. cleaning ventilation fans or ovens, wait 10 min- utes, and then rinse with water. 6. After turning on the power, press FILTER SIGN RESET button.
  • Page 211 TRALIZED CONTROL) and the unit operates room becomes uneven. It is necessary to clean in a mode different to what is shown on the the inside of the indoor unit. Ask your Daikin remote controller display. dealer for details on cleaning the unit. This oper- When using a unit in a multi system, the opera- ation requires a qualified service person.
  • Page 212 Measure: Notify and inform the model name and what the malfunction code indicates the system is in operation or after the stop of to your Daikin dealer. operation. Expansion and contraction of plastic parts II. If the system does not properly operate caused by temperature change makes this noise.
  • Page 213 Instruction Si12-619A Operation Manual...

  • Page 214: Part 6 Service Diagnosis

    Si12-619A Part 6 Service Diagnosis 1. Caution for Diagnosis.................202 1.1 Troubleshooting with Operation Lamp ..........202 2. Problem Symptoms and Measures .............204 3. Service Check Function ..............205 4. Code Indication on the Remote Controller ..........208 4.1 Error Codes and Description of Fault ...........208 5.

  • Page 215: Caution For Diagnosis

    Caution for Diagnosis Si12-619A 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 216 Si12-619A Caution for Diagnosis Caution: Operation stops suddenly. (Operation lamp blinks.) Cause of above trouble could be "Operation mode conflict". Check followings; Are the operation modes all the same for indoor units connected to Multi system outdoor unit? If not set all indoor units to the same operation mode and confirm that the operation lamp is not blinking.

  • Page 217: Problem Symptoms And Measures

    Problem Symptoms and Measures Si12-619A 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 218: Service Check Function

    Si12-619A 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 219 Service Check Function Si12-619A 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 220 Si12-619A 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 221: Code Indication On The Remote Controller

    Code Indication on the Remote Controller Si12-619A 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 or over-voltage detection Signal transmission error (between indoor and outdoor units) Signal transmission error (on outdoor unit PCB) Unspecified voltage (between indoor and outdoor units) Anti-icing function in other rooms...

  • Page 222: Troubleshooting

    Si12-619A 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 223: Outdoor Units

    Troubleshooting Si12-619A 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 224: Indoor Unit Pcb Abnormality

    Si12-619A 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 225: Freeze-Up Protection Control Or High Pressure Control

    Troubleshooting Si12-619A 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 226 Si12-619A 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.263 Is there any Provide sufficient air passage. short-circuit? Check the intake air filter. Is it very dirty? Clean the air filter.

  • Page 227: Fan Motor Or Related Abnormality

    Troubleshooting Si12-619A 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 228: Dc Motor

    Si12-619A 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 229 Troubleshooting Si12-619A 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.260 and rotate fan by hand. Check No.02 Does fan rotate Replace fan motor.

  • Page 230: Thermistor Or Related Abnormality (Indoor Unit)

    Si12-619A Troubleshooting Thermistor or Related Abnormality (Indoor Unit) Remote Controller Display Method of The temperatures detected by the thermistors are used to determine thermistor errors. Malfunction Detection Malfunction When the thermistor input is more than 4.96 V or less than 0.04 V during compressor operation ∗...

  • Page 231: Shutter Drive Motor / Shutter Limit Switch Abnormality

    Troubleshooting Si12-619A Shutter Drive Motor / Shutter Limit Switch Abnormality Remote Controller Display Method of The shutter open / close performance is detected by the limit switch attached on its structure. In this way, the shutter drive motor and the shutter limit switch are checked for failure. Malfunction Detection Malfunction...

  • Page 232: Signal Transmission Error (Between Indoor And Outdoor Units)

    Si12-619A Troubleshooting 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 233 Troubleshooting Si12-619A 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.266 connection wires. Is there any wiring error? Correct the indoor unit-outdoor unit connection wires.

  • Page 234: Unspecified Voltage (Between Indoor And Outdoor Units)

    Si12-619A Troubleshooting 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 235: Freeze-Up Protection Control

    Troubleshooting Si12-619A 5.10 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 236 Si12-619A Troubleshooting 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.261 Check No.06 Wiring or piping out of spec? Activate the wiring error Refer to P.263 check mode.

  • Page 237: Outdoor Unit Pcb Abnormality

    Troubleshooting Si12-619A 5.11 Outdoor Unit PCB Abnormality Remote Controller Display Outdoor Unit LED Display Method of Detect within the programme of the microcomputer that the programme is in normal running order. Malfunction Detection Malfunction When the programme of the microcomputer is in abnormal running order. Decision Conditions Supposed...

  • Page 238: Ol Activation (Compressor Overload)

    Si12-619A Troubleshooting 5.12 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 239: Compressor Lock

    Troubleshooting Si12-619A 5.13 Compressor Lock 5.13.1 E Series (68-75 Class), D Series 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 240 Si12-619A Troubleshooting 5.13.2 E Series (50-58 Class, 80-100 Class) 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 Judging from current waveform generated when high-frequency voltage is applied to the compressor.

  • Page 241: Dc Fan Lock

    Troubleshooting Si12-619A 5.14 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 242: Input Over Current Detection

    Si12-619A Troubleshooting 5.15 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 input current is a certain value (depending on the model) or over for 2.5 seconds. The compressor halts if the error occurs, and restarts automatically after 3 minutes stand-by.
  • Page 243 Troubleshooting Si12-619A 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.264 reconnected for part replacement, for example, and the system is interrupted by an input over-current, take the following procedure.

  • Page 244: Four Way Valve Abnormality

    Si12-619A Troubleshooting 5.16 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 245 Troubleshooting Si12-619A 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.262 Four-way valve coil Correct. disconnected (loose)? Check No.06 Refer to P.263 Harness out of connector? Reconnect.

  • Page 246: Discharge Pipe Temperature Control

    Si12-619A Troubleshooting 5.17 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 247: High Pressure Control In Cooling

    Troubleshooting Si12-619A 5.18 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 248 Si12-619A 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.261 Check the installation space. Check No.06 Check No.07 Abnormal Installation condition Change the air outlet grille Refer to P.263 check position.

  • Page 249: Compressor Sensor System Abnormality

    Troubleshooting Si12-619A 5.19 Compressor Sensor System Abnormality Remote Controller Display Outdoor Unit LED Display Method of Fault condition is identified by the supply voltage and the DC voltage which is detected before the compressor startup. Malfunction Fault condition is identified by compressor current which is detected right after the Detection compressor startup.
  • Page 250 Si12-619A Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Turn off the power Reactor connection check Connection OK? Connect properly. Compressor connection check Connection OK? Connect properly. Disconnect the reactor from the outdoor Reactor check unit PCB and measure the resistance...

  • Page 251: Position Sensor Abnormality

    Troubleshooting Si12-619A 5.20 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 252: Ct Or Related Abnormality

    Si12-619A Troubleshooting 5.21 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 Hz and the CT input is below 0.1 V.
  • Page 253 Troubleshooting Si12-619A 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.267 again. Get the system started. ∗...

  • Page 254: Thermistor Or Related Abnormality (Outdoor Unit)

    Si12-619A Troubleshooting 5.22 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 255 Troubleshooting Si12-619A 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.263 Error displayed again Reconnect. on remote controller? Connector or thermistor Reconnect.

  • Page 256: Electrical Box Temperature Rise

    Si12-619A Troubleshooting 5.23 Electrical Box Temperature Rise 5.23.1 E Series (68-75 Class), D Series 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...
  • Page 257 Troubleshooting Si12-619A 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.263 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 258 Si12-619A Troubleshooting 5.23.2 E Series (50-58 Class, 80-100 Class) 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 100°C. The error is cleared when the temperature drops below 85°C (52-58 class) or 70°C (80-100 Decision class).
  • Page 259 Troubleshooting Si12-619A Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.07 WARNING Turn off the power and turn it on Refer to P.264 again. To cool down the electricals, the outdoor unit fan gets started when the radiation fin temperature rises above 100˚C and stops itself...

  • Page 260: Radiation Fin Temperature Rise

    Si12-619A Troubleshooting 5.24 Radiation Fin Temperature Rise 5.24.1 E Series (68-75 Class), D Series 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...
  • Page 261 Troubleshooting Si12-619A Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.06 Turn off the power and turn it on Refer to P.263 again to get the system started. Check No.07 Refer to P.264 Has PCB been...
  • Page 262 Si12-619A Troubleshooting 5.24.2 E Series (50-58 Class, 80-100 Class) 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...
  • Page 263 Troubleshooting Si12-619A Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.07 Turn off the power and turn it on again to get the system started. Refer to P.264 Check No.09 Refer to P.265 Has PCB been...

  • Page 264: Output Over Current Detection

    Si12-619A Troubleshooting 5.25 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 265 Troubleshooting Si12-619A 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.264 reconnected for part replacement, for example, and the system is interrupted by an output over-current, take the following procedure.

  • Page 266: Insufficient Gas

    Si12-619A Troubleshooting 5.26 Insufficient Gas 5.26.1 E Series (68-75 Class), D Series 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.
  • Page 267 Troubleshooting Si12-619A 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.261 Any thermistor Reconnect in position. disconnected? * Discharge pipe thermistor * Indoor / outdoor unit heat exchanger thermistor Check No.06 * Room temperature thermistor Refer to P.263...
  • Page 268 Si12-619A Troubleshooting 5.26.2 E Series (50-58 Class, 80-100 Class) 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 269 Troubleshooting Si12-619A 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.261 Any thermistor Reconnect in position. disconnected? * Discharge pipe thermistor * Indoor / outdoor unit heat exchanger thermistor Check No.06 * Room temperature thermistor Refer to P.263...

  • Page 270: Low-Voltage Detection Or Over-Voltage Detection

    Si12-619A Troubleshooting 5.27 Low-voltage Detection Over-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 271: Signal Transmission Error (On Outdoor Unit Pcb)

    Troubleshooting Si12-619A 5.28 Signal Transmission Error (on Outdoor Unit PCB) Remote Controller Display Outdoor Unit LED Display Method of Communication error between microcomputer mounted on the main PCB and PM1. Malfunction Detection Malfunction When the data sent from the PM1 can not be received successively for 9 sec. The abnormality is determined if the above fault conditions occurs once Decision Fault counter is reset when the data from the PM1 can be successfully received.

  • Page 272: Anti-Icing Function In Other Rooms / Unspecified Voltage (Between Indoor And Outdoor Units)

    Si12-619A Troubleshooting 5.29 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 273: Check

    Check Si12-619A 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 274: Electronic Expansion Valve Check

    Si12-619A Check 6.1.3 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 275: Four Way Valve Performance Check

    Check Si12-619A 6.1.4 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 276: Thermistor Resistance Check

    Si12-619A Check 6.1.5 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 277: Installation Condition Check

    Check Si12-619A 6.1.6 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 278: Discharge Pressure Check

    Si12-619A Check 6.1.7 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 279: Power Supply Waveforms Check

    Check Si12-619A 6.1.9 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 280: Capacitor Voltage Check

    Si12-619A Check 6.1.11 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 281: Main Circuit Electrolytic Capacitor Check

    Check Si12-619A 6.1.13 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 282: Hall Ic Check

    Si12-619A Check 6.1.15 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 283 Check Si12-619A Service Diagnosis...

  • Page 284: Part 7 Removal Procedure

    Si12-619A Part 7 Removal Procedure 1. Outdoor Unit – E Series (50 / 52 / 58 Class)........272 1.1 Removal of the Panels and Plates ............272 1.2 Removal of the Electrical Box ..............277 1.3 Removal of the PCB................284 1.4 Removal of the Propeller Fan / Fan Motor ...........290 1.5 Removal of the Sound Blanket.............292 1.6 Removal of Electronic Expansion Valve Coil, Four Way Valve Coil and Thermistor ...........296...

  • Page 285: Outdoor Unit - E Series (50 / 52 / 58 Class)

    Outdoor Unit – E Series (50 / 52 / 58 Class) Si12-619A 1. Outdoor Unit – E Series (50 / 52 / 58 Class) Removal of the Panels and Plates Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
  • Page 286 Si12-619A Outdoor Unit – E Series (50 / 52 / 58 Class) Step Procedure Points Loosen the 6 screws of front panel. Loosen the 2 screws (each one in front and back) of the clamp plate. Slide the clamp plate to the left to undo the hooks and remove the plate.
  • Page 287 Outdoor Unit – E Series (50 / 52 / 58 Class) Si12-619A Step Procedure Points Lift the front panel up to remove the left side hooks and open the panel. The front panel has the 3 hooks on the left. The front panel has the hook on the right.
  • Page 288 Si12-619A Outdoor Unit – E Series (50 / 52 / 58 Class) Step Procedure Points Loosen the 4 screws of discharge grille. Loosen the 2 screws of stop valve cover. And then slide the cover downward to remove. Removal Procedure...
  • Page 289 Outdoor Unit – E Series (50 / 52 / 58 Class) Si12-619A Step Procedure Points When assembling, make sure to catch the 5 hooks. Removal Procedure...

  • Page 290: Removal Of The Electrical Box

    Si12-619A Outdoor Unit – E Series (50 / 52 / 58 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 1. Disconnect the Illustrations are for 3 room connecting wires model.
  • Page 291 Outdoor Unit – E Series (50 / 52 / 58 Class) Si12-619A Step Procedure Points 2. Disconnect the each harnesses Detach the fixing tape for the electrical box (cover). Undo the 4 hooks at the mark of the drip proof cover. Lift the cover up to remove.
  • Page 292 Si12-619A Outdoor Unit – E Series (50 / 52 / 58 Class) Step Procedure Points The figure shows the arrangement of the wire harness for fan motor. Disconnect the The number of the connectors for connectors are different electronic expansion according to the number of valve coil.
  • Page 293 Outdoor Unit – E Series (50 / 52 / 58 Class) Si12-619A Step Procedure Points Disconnect the connector for overload protector [S40]. Disconnect the connector for relay harness of compressor. Disconnect the each connector. [S90] : Outdoor air, heat exchanger, discharge pipe thermistor [S92] : Gas pipe...
  • Page 294 Si12-619A Outdoor Unit – E Series (50 / 52 / 58 Class) Step Procedure Points Disconnect the connector for four way valve [S80]. The figure shows the arrangement of the wire harness under the electrical box. Undo the wire clip for the thermistor lead wire.
  • Page 295 Outdoor Unit – E Series (50 / 52 / 58 Class) Si12-619A Step Procedure Points 3. Remove the electrical box Loosen the 2 screws of the earth terminal. 4. Disconnect the power supply connecting wires Loosen the screws on the terminal board and disconnect the wires of A, B, C(, and D) port.
  • Page 296 Si12-619A Outdoor Unit – E Series (50 / 52 / 58 Class) Step Procedure Points Detach the outdoor air thermistor. Loosen the screw on the right side of the electrical box. Loosen the screw in front of the electrical box. Lift up the electrical box to remove.

  • Page 297: Removal Of The Pcb

    Outdoor Unit – E Series (50 / 52 / 58 Class) Si12-619A Removal of the PCB Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the service PCB External appearance of the service PCB and...
  • Page 298 Si12-619A Outdoor Unit – E Series (50 / 52 / 58 Class) Step Procedure Points Widen the upper hook and pull the service PCB upward to remove. 2. Remove the control PCB Disconnect the each connectors on the terminal board. Disconnect the 2 connectors for reactor.
  • Page 299 Outdoor Unit – E Series (50 / 52 / 58 Class) Si12-619A Step Procedure Points Undo the 3 hooks on the reactor side and slide the control PCB. Undo the relay harness for compressor from the hook. Lift up the control PCB In working, be careful not to to remove.
  • Page 300 Si12-619A Outdoor Unit – E Series (50 / 52 / 58 Class) Step Procedure Points Names of parts on the control PCB. Loosen the 2 screws of the radiation fin. Loosen the 3 screws of the reactor and the one screw of the clamp.
  • Page 301 Outdoor Unit – E Series (50 / 52 / 58 Class) Si12-619A Step Procedure Points 3. Disconnect the wire harnesses 4. Remove the terminal board Open the electrical box and remove the terminal board. Removal Procedure...
  • Page 302 Si12-619A Outdoor Unit – E Series (50 / 52 / 58 Class) Step Procedure Points Removal Procedure...

  • Page 303: Removal Of The Propeller Fan / Fan Motor

    Outdoor Unit – E Series (50 / 52 / 58 Class) Si12-619A Removal of the Propeller Fan / 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...
  • Page 304 Si12-619A Outdoor Unit – E Series (50 / 52 / 58 Class) Step Procedure Points Undo the 2 fixing hooks of the lead wire. Loosen the 4 screws of the fan motor. Lead wire Propeller fan (R3249) When assembling, put the lead wire through the back of the motor.

  • Page 305: Removal Of The Sound Blanket

    Outdoor Unit – E Series (50 / 52 / 58 Class) Si12-619A Removal of the Sound Blanket Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the right side Remove the outer panels panel...
  • Page 306 Si12-619A Outdoor Unit – E Series (50 / 52 / 58 Class) Step Procedure Points Pull up the right side panel. Loosen the 2 screws of the wiring fixture. 2. Remove the partition plate Loosen the 2 screws to remove the partition plate.
  • Page 307 Outdoor Unit – E Series (50 / 52 / 58 Class) Si12-619A Step Procedure Points Pull up the partition plate. When assembling, make sure to catch the lower hook of the partition plate. 3. Remove the sound blanket Lift up the sound blanket (top-upper) to remove.
  • Page 308 Si12-619A Outdoor Unit – E Series (50 / 52 / 58 Class) Step Procedure Points Remove the sound blanket (top-lower). Undo the fixing strings, open the sound blanket (body) and pull it out. Open the sound blanket (inner) and pull it out. Removal Procedure...

  • Page 309: Removal Of Electronic Expansion Valve Coil, Four Way Valve Coil And Thermistor

    Outdoor Unit – E Series (50 / 52 / 58 Class) Si12-619A Removal of Electronic Expansion Valve Coil, Four Way Valve Coil and Thermistor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
  • Page 310 Si12-619A Outdoor Unit – E Series (50 / 52 / 58 Class) Step Procedure Points 3. Remove the liquid/gas Meet the edge of the pipe thermistor thermistor and clip. Open the putty and The number of ports is remove the liquid pipe different according to the thermistor.
  • Page 311 Outdoor Unit – E Series (50 / 52 / 58 Class) Si12-619A Step Procedure Points 5. Remove the discharge Meet the edge of the pipe thermistor thermistor and clip. Undo the clip and Be careful not to loose the remove the discharge clip for the discharge pipe pipe thermistor.

  • Page 312: Removal Of The Distributor

    Si12-619A Outdoor Unit – E Series (50 / 52 / 58 Class) Removal of the Distributor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the putty. Warning Ventilate when refrigerant leaks during the work.

  • Page 313: Removal Of The Four Way Valve

    Outdoor Unit – E Series (50 / 52 / 58 Class) Si12-619A Removal of the 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 Be sure to apply nitrogen Cautions for restoration replacement when...

  • Page 314: Removal Of The Compressor

    Si12-619A Outdoor Unit – E Series (50 / 52 / 58 Class) Removal of the Compressor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the terminal Make a note.
  • Page 315 Outdoor Unit – E Series (50 / 52 / 58 Class) Si12-619A Step Procedure Points Remove the 2 sheets of putty. Warning Ventilate when refrigerant leaks during the work. (If refrigerant contacts fire, it will cause to arise toxic gas.) There is one nut fixing the compressor.

  • Page 316: Outdoor Unit - E Series (68 / 71 / 75 Class), D Series

    Si12-619A Outdoor Unit – E Series (68 / 71 / 75 Class), D Series 2. Outdoor Unit – E Series (68 / 71 / 75 Class), D Series Removal of the Outer Panels Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.

  • Page 317: Removal Of The Electrical Box

    Outdoor Unit – E Series (68 / 71 / 75 Class), D Series Si12-619A 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 1.
  • Page 318 Si12-619A Outdoor Unit – E Series (68 / 71 / 75 Class), D Series 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...
  • Page 319 Outdoor Unit – E Series (68 / 71 / 75 Class), D Series Si12-619A 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.
  • Page 320 Si12-619A Outdoor Unit – E Series (68 / 71 / 75 Class), D Series Step Procedure Points Remove the 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 321: Removal Of The Pcb

    Outdoor Unit – E Series (68 / 71 / 75 Class), D Series Si12-619A Removal of the 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 the screw of the PCB, and release 2 tabs.
  • Page 322 Si12-619A Outdoor Unit – E Series (68 / 71 / 75 Class), D Series 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 323 Outdoor Unit – E Series (68 / 71 / 75 Class), D Series Si12-619A 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.

  • Page 324: Removal Of The Fan Motor

    Si12-619A Outdoor Unit – E Series (68 / 71 / 75 Class), D Series Removal of the 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...

  • Page 325: Removal Of The Sound Blanket

    Outdoor Unit – E Series (68 / 71 / 75 Class), D Series Si12-619A Removal of the 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.

  • Page 326: Electronic Expansion Valve Coil And Thermistor

    Si12-619A Outdoor Unit – E Series (68 / 71 / 75 Class), D Series Removal of the 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.
  • Page 327 Outdoor Unit – E Series (68 / 71 / 75 Class), D Series Si12-619A 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...

  • Page 328: Removal Of The Four Way Valve, Solenoid Valve And Shunt

    Si12-619A Outdoor Unit – E Series (68 / 71 / 75 Class), D Series Removal of the 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...

  • Page 329: Removal Of The Solenoid Valve And Shunt

    Outdoor Unit – E Series (68 / 71 / 75 Class), D Series Si12-619A Removal of the 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...

  • Page 330: Removal Of The Compressor

    Si12-619A Outdoor Unit – E Series (68 / 71 / 75 Class), D Series Removal of the 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.

  • Page 331: Outdoor Unit - E Series (80 / 90 / 100 Class)

    Outdoor Unit – E Series (80 / 90 / 100 Class) Si12-619A 3. Outdoor Unit – E Series (80 / 90 / 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.
  • Page 332 Si12-619A Outdoor Unit – E Series (80 / 90 / 100 Class) Step Procedure Points Next, slide the grille downward to undo the 3 Hooks top hooks. (R6371) Remove the suction grille. (R6372) 2. Removing the panel. Remove the 4 screws on the back and one screw on the left side panel.
  • Page 333 Outdoor Unit – E Series (80 / 90 / 100 Class) Si12-619A Step Procedure Points Remove the 2 screws on the front and one screw on the right side panel. (R6374) Lift the top panel and remove it. (R6375) 3. Removing the right side panel.
  • Page 334 Si12-619A Outdoor Unit – E Series (80 / 90 / 100 Class) Step Procedure Points Slide the panel downward to undo 2 hooks on the back side. (R6377) Hooks (R6378) Hooks Hook Holes Hook Holes (R6379) Removal Procedure...
  • Page 335 Outdoor Unit – E Series (80 / 90 / 100 Class) Si12-619A Step Procedure Points Remove the right side panel. (R6380) 4. Removing the front panel Front Panel (2) Remove the 2 screws. Front Panel (1) (R6381) Removal Procedure...
  • Page 336 Si12-619A Outdoor Unit – E Series (80 / 90 / 100 Class) Step Procedure Points Slide the panel downward to undo the hook. (R6382) (R6383) Remove the front panel (2). (R6384) Removal Procedure...
  • Page 337 Outdoor Unit – E Series (80 / 90 / 100 Class) Si12-619A Step Procedure Points 5. Removing the front panel Remove the discharge grille propeller fan first to remove the Front front panel (1). Remove the 4 screws Panel (1) on the discharge grille.
  • Page 338 Si12-619A Outdoor Unit – E Series (80 / 90 / 100 Class) Step Procedure Points Next, slide the grille downward to undo the 2 hooks at the top. (R6387) Hooks (R6388) Remove the discharge grille. (R6389) Remove the propeller Fan fixing nut : M8 fan fixing nut.
  • Page 339 Outdoor Unit – E Series (80 / 90 / 100 Class) Si12-619A Step Procedure Points Remove the 2 fixing screws on the partition plate. (R6391) Remove the screw at bottom left of the front. (R6392) Remove the screw at bottom of the left side. (R6393) Removal Procedure...
  • Page 340 Si12-619A Outdoor Unit – E Series (80 / 90 / 100 Class) Step Procedure Points Remove the screw at bottom of the back side. (R6394) The front panel (1) is provided with a hook on its front. Lift the front panel off position to remove it.
  • Page 341 Outdoor Unit – E Series (80 / 90 / 100 Class) Si12-619A Step Procedure Points Remove the front panel (1). The back is a little complicated in shape. Be sure to detach carefully. (R6396) 6. Removing the rear panel Remove the fixing screw on the partition plate.
  • Page 342 Si12-619A Outdoor Unit – E Series (80 / 90 / 100 Class) Step Procedure Points Slide the panel leftward to undo the hook, and remove the partition plate. (R6398) Remove the 5 screws. (R6399) Removal Procedure...
  • Page 343 Outdoor Unit – E Series (80 / 90 / 100 Class) Si12-619A Step Procedure Points Remove the wire fixing plate (upper). (R6400) Remove the 3 screws. (R6401) Remove the wire fixing plate (lower). (R6402) Removal Procedure...
  • Page 344 Si12-619A Outdoor Unit – E Series (80 / 90 / 100 Class) Step Procedure Points Undo the holder of the The holder is secured in the thermistor. clearances of the heat exchanger fins. (R6403) Groove (R6404) Remove the 3 fixing screws on the partition plate.
  • Page 345 Outdoor Unit – E Series (80 / 90 / 100 Class) Si12-619A Step Procedure Points Remove the fixing screw from the bottom frame. (R6406) Remove the fixing screw from the shut-off valve mounting plate. (R6407) Lift the panel upward to undo the 2 hooks and remove it.
  • Page 346 Si12-619A Outdoor Unit – E Series (80 / 90 / 100 Class) Step Procedure Points Remove the rear panel. (R6409) Removal Procedure...

  • Page 347: Removal Of The Electrical Box

    Outdoor Unit – E Series (80 / 90 / 100 Class) Si12-619A 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.
  • Page 348 Si12-619A Outdoor Unit – E Series (80 / 90 / 100 Class) Step Procedure Points Disconnect the fan motor connector S70. [S70] (R6413) Release the fan motor wire harness. (R6414) Disconnect the Detach the clamp. motorized valve Just pull the push-mount [S80] connector S80.
  • Page 349 Outdoor Unit – E Series (80 / 90 / 100 Class) Si12-619A Step Procedure Points Disconnect the liquid pipe thermistor [S93] connector S93. Clamp (R6417) Disconnect the gas pipe thermistor connector [S92] S92. (R6418) 10 Disconnect the discharge pipe [S90] thermistor connector S90.
  • Page 350 Si12-619A Outdoor Unit – E Series (80 / 90 / 100 Class) Step Procedure Points 11 The wire harness is hooked on the bottom of the electrical box. Unhook it and remove the clamp. Clamp (R6420) 12 Disconnect the OL [S40] connector S40.
  • Page 351 Outdoor Unit – E Series (80 / 90 / 100 Class) Si12-619A Step Procedure Points 14 Use long-nose pliers or Detach the clamp. the like to pull out the Just pull the push-mount clamp. type out of position. Clamp (R6423) 15 Disconnect the relay connector of the compressor.
  • Page 352 Si12-619A Outdoor Unit – E Series (80 / 90 / 100 Class) Step Procedure Points 17 Lift up the electrical box to remove it. (R6425) Removal Procedure...

  • Page 353: Removal Of Pcb

    Outdoor Unit – E Series (80 / 90 / 100 Class) Si12-619A 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 Open the cover of the Undo the 4 hooks.
  • Page 354 Si12-619A Outdoor Unit – E Series (80 / 90 / 100 Class) Step Procedure Points Disconnect the Connectors & S71: connectors one by one For inverter PCB starting from your side. Connectors & S32: For SPM PCB Connectors & S101: For display PCB Connector S10: For relay Connectors H1/H2: For DB...
  • Page 355 Outdoor Unit – E Series (80 / 90 / 100 Class) Si12-619A Step Procedure Points 3. Removing the display PCB. Disconnect the control PCB connectors S52, S102 (R6435) Slightly lift the top hooks to detach. (R6436) Undo the bottom hook to remove the display PCB.
  • Page 356 Si12-619A Outdoor Unit – E Series (80 / 90 / 100 Class) Step Procedure Points 4. Removing the servicing cover off the terminal block assembly. Remove the screw. (R6438) Lift the hook to detach. (R6439) Open the cover toward yourself. (R6440) Removal Procedure...

  • Page 357: Removal Of Fan Motor

    Outdoor Unit – E Series (80 / 90 / 100 Class) Si12-619A 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 (R6441) Remove the 2 screws Be sure to remove the bottom at the bottom first.

  • Page 358: Removal Of Coils / Thermistors

    Si12-619A Outdoor Unit – E Series (80 / 90 / 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 The number of motorized valve coil...
  • Page 359 Outdoor Unit – E Series (80 / 90 / 100 Class) Si12-619A Step Procedure Points Pull out the thermistors. Gas pipe thermistor (R6956) (R6448) Removal Procedure...
  • Page 360 Si12-619A Outdoor Unit – E Series (80 / 90 / 100 Class) Step Procedure Points Peel the putty from the liquid pipe thermistor, and pull out the thermistor. Liquid pipe thermistor (R6957) (R6450) 2. Removal of Thermistors Pull out the heat exchanger thermistor.
  • Page 361 Outdoor Unit – E Series (80 / 90 / 100 Class) Si12-619A Step Procedure Points Remove the spring from Be careful no to lose the the heat exchanger spring. thermistor. Spring Spring (R6452) Slightly open the sound blanket. (R6453) Remove the sound blanket (top upper).
  • Page 362 Si12-619A Outdoor Unit – E Series (80 / 90 / 100 Class) Step Procedure Points Remove the discharge pipe thermistor. (R6455) Remove the fixture. (R6456) 3. Removing the Four way valve coil and motorized valve coil Remove the screw. (R6457) Removal Procedure...
  • Page 363 Outdoor Unit – E Series (80 / 90 / 100 Class) Si12-619A Step Procedure Points Remove the Four way valve coil. (R6458) Removal Procedure...

  • Page 364: Removal Of Sound Blanket

    Si12-619A Outdoor Unit – E Series (80 / 90 / 100 Class) 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 Undo the 2 Velcro tapes off the sound blanket, and open the sound blanket (outer...
  • Page 365 Outdoor Unit – E Series (80 / 90 / 100 Class) Si12-619A Step Procedure Points Remove the sound The sound blanket is fragile. blanket (outer sleeve). Be careful of the notches of the compressor mount (3 locations). (R6462) Remove the sound The sound blanket is fragile.
  • Page 366 Si12-619A Outdoor Unit – E Series (80 / 90 / 100 Class) Step Procedure Points Remove the sound blanket (outer sleeve). (R6465) Removal Procedure...

  • Page 367: Removal Of Compressor

    Outdoor Unit – E Series (80 / 90 / 100 Class) Si12-619A 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.

  • Page 368: Part 8 Others

    Si12-619A Part 8 Others 1. Others ....................356 1.1 Test Run from the Remote Controller ..........356 1.2 Jumper Settings ...................357 1.3 Application of Silicon Grease to a Power Transistor and a Diode Bridge..................358 Others...

  • Page 369: Others

    Others Si12-619A 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 370: Jumper Settings

    Si12-619A 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 371: Application Of Silicon Grease To A Power Transistor And A Diode Bridge

    Others Si12-619A 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 372: Part 9 Appendix

    Si12-619A Part 9 Appendix 1. Piping Diagrams..................360 1.1 Indoor Units ..................360 1.2 Outdoor Units ..................364 2. Wiring Diagrams..................370 2.1 Indoor Units ..................370 2.2 Outdoor Units ..................376 Appendix...

  • Page 373: Piping Diagrams

    Piping Diagrams Si12-619A Piping Diagrams Indoor Units 1.1.1 Wall Mounted Type FTKS25/35EVMA, FTKS25/35DVM FTXS50/60FVMA, FTK(X)S50/60DVMT FTKS20DVMA, FTKS20/25/35DVMT FTK(X)S50/60FVLT, FTKS50/60BVMB INDOOR UNIT INDOOR UNIT MAFFLER ASSY HEAT EXCHANGER 7.0CuT ( 7.9CuT ) 6.4CuT HEAT EXCHANGER THERMISTOR 6.4CuT ON HEAT EXCH. 6.4CuT THERMISTOR ON HEAT EXCH.
  • Page 374 Si12-619A Piping Diagrams FTXS25/35EVMA, FTXS20DVMA FTXS71FVMA, FTXS71DVMT, FTXS71FVLT FTXS20/25/35DVMT INDOOR UNIT INDOOR UNIT MAFFLER ASSY HEAT EXCHANGER 7.0CuT ( 7.9CuT ) 6.4CuT THERMISTOR HEAT EXCHANGER 6.4CuT ON HEAT EXCH. 6.4CuT THERMISTOR ON HEAT EXCH. CROSS FLOW FAN FIELD PIPING CROSS FLOW FAN FIELD PIPING ( 6.4CuT ) ( 6.4CuT )
  • Page 375 Piping Diagrams Si12-619A 1.1.3 Floor / Ceiling Suspended Dual Type FLXS25BVMA, FLXS35BVMA FLXS50BVMA, FLXS60BVMA INDOOR UNIT INDOOR UNIT ( 9.5CuT ) ( 6.4CuT ) HEAT EXCHANGER HEAT EXCHANGER THERMISTOR THERMISTOR ON HEAT FIELD PIPING FIELD PIPING ON HEAT EXCH. ( 6.4CuT ) ( 6.4CuT ) EXCH.
  • Page 376 Si12-619A Piping Diagrams FVXS50BVMA INDOOR UNIT HEAT EXCHANGER MUFFLER 7.0CuT 4.8CuT 4.8CuT CROSS FLOW FAN FAN MOTOR THERMISTOR MUFFLER ON HEAT EXCH. 7.0CuT 7.0CuT FIELD PIPING CROSS FLOW FAN FAN MOTOR 7.0CuT ( 6.4CuT ) FIELD PIPING 9.5CuT ( 12.7CuT ) REFRIGERANT FLOW COOLING HEATING...

  • Page 377: Outdoor Units

    Piping Diagrams Si12-619A Outdoor Units 1.2.1 Cooling Only 3MKS58EVMA OUTDOOR UNIT HEAT EXCHANGER OUTDOOR TEMPERATURE ELECTRONIC THERMISTOR(DOA) EXPANSION VALVE HEADER LIQUID PIPE THERMISTOR(DLA) 6.4CuT HEADER 9.5CuT ROOM A (6.4 CuT) FILTER ELECTRONIC EXPANSION VALVE LIQUID PIPE THERMISTOR(DLB) FIELD 6.4CuT ROOM B PIPING (6.4 CuT) FILTER...
  • Page 378 Si12-619A Piping Diagrams 4MKS90EVMA, 4MKS100EVLT, 4MKS80ESG OUTDOOR UNIT MOTOR OPERATED LIQUID PIPE HEAT EXCHANGER VALVE (A) THERMISTOR OUTDOOR TEMPERATURE (ROOM-A) 7.9CuT THERMISTOR 7.9CuT HEADER ROOM A 7.9CuT HEADER LIQUID PIPE MOTOR OPERATED (6.4 CuT) 7.9CuT FILTER VALVE (B) THERMISTOR 7.9CuT 9.5CuT (ROOM-B) 7.9CuT...
  • Page 379 Piping Diagrams Si12-619A 3MKS50DVM OUTDOOR UNIT HEAT EXCHANGER OUTDOOR TEMPERATURE THERMISTOR ( DOA ) MOTOR OPERATED VALVE LIQUID PIPE THERMISTOR ( DLA ) HEADER 6.4CuT 9.5CuT ROOM A ( 6.4CuT ) FILTER MOTOR OPERATED VALVE THERMISTOR ( DLB ) 6.4CuT FIELD ROOM B PIPING...
  • Page 380 Si12-619A Piping Diagrams 3MKS50ESG OUTDOOR UNIT HEAT EXCHANGER OUTDOOR TEMPERATURE ELECTRONIC THERMISTOR ( DOA ) HEADER EXPANSION VALVE LIQUID PIPE THERMISTOR ( DLA ) 6.4CuT HEADER 9.5CuT ROOM A ( 6.4 CuT ) FILTER ELECTRONIC EXPANSION VALVE LIQUID PIPE THERMISTOR ( DLB ) FIELD 6.4CuT ROOM B...
  • Page 381 Piping Diagrams Si12-619A 1.2.2 Heat Pump 3MXS52EVMA OUTDOOR UNIT HEAT EXCHANGER OUTDOOR TEMPERATURE THERMISTOR ( DOA ) HEADER ELECTRONIC EXPANSION VALVE LIQUID PIPE HEADER THERMISTOR ( DLA ) 9.5CuT 6.4CuT ROOM A ( 6.4 CuT ) FILTER ELECTRONIC EXPANSION VALVE LIQUID PIPE THERMISTOR ( DLB ) FIELD...
  • Page 382 Si12-619A Piping Diagrams 4MXS80EVMA, 4MXS100EVLT OUTDOOR UNIT MOTOR OPERATED LIQUID PIPE HEAT EXCHANGER VALVE (A) THERMISTOR OUTDOOR 7.9CuT (ROOM-A) TEMPERATURE RECEIVER HEADER 7.9CuT 7.9CuT ROOM A THERMISTOR HEADER LIQUID PIPE MOTOR OPERATED 7.9CuT FILTER (6.4 CuT) VALVE (B) THERMISTOR 7.9CuT 9.5CuT (ROOM-B) 7.9CuT...

  • Page 383: Wiring Diagrams

    Wiring Diagrams Si12-619A Wiring Diagrams Indoor Units 2.1.1 Wall Mounted Type FTK(X)S25/35EVMA, FTKS25/35DVM, FTK(X)S20DVMA FIELD WIRING. PCB3 PCB1 RECTIFIER 3.15A LED1 OUTDOOR LED2 CAUTION LED3 TRANSMISSION NOTE THAT OPERATION WILL CIRCUIT RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN.
  • Page 384 Si12-619A Wiring Diagrams FTKS50/60/71FVM, FTK(X)S50/60/71FVMA, FTK(X)S60/71DVMT, FTKS60/71BVMB FIELD WIRING. PCB3 PCB1 RECTIFIER 3.15A OUTDOOR ° CAUTION TRANSMISSION NOTE THAT OPERATION WILL CIRCUIT RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS PCB4 TURNED OFF AND THEN BACK ON AGAIN. LED1 LED2 LED3 : FRAME GROUND : FUSE...
  • Page 385 Wiring Diagrams Si12-619A FTK(X)S50/60/71FVLT Appendix...
  • Page 386 Si12-619A Wiring Diagrams 2.1.2 Duct Connected Type FDKS25/35CAVMB, FDKS50/60CVMB, FDKS25/35EAVMB, CDKS25/35/50/60CVMA, CDKS25/35EAVMA, FDXS25/35/50/60CVMA, CDXS25/35EAVMA PCB1 PCB2 V1TR outdoor 3.15A FIELD WIRING. TERMINAL FOR CAUTION CENTRALIZED CONTROL TRANSMISSION NOTE THAT OPERATION WILL CIRCUIT RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK SIGNAL ON AGAIN.
  • Page 387 Wiring Diagrams Si12-619A 2.1.3 Floor / Ceiling Suspended Dual Type FLXS25BVMA, FLXS35BVMA, FLXS50BVMA, FLXS60BVMA 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 388 Si12-619A Wiring Diagrams 2.1.5 Ceiling Mounted Cassette Type FFQ25B8V1B, FFQ35B8V1B, FFQ50B8V1B, FFQ60B8V1B : CONNECTER DISCRIMINATION COLOUR FOR COMPONENTS. : CONNECTER COLOUR FOR COMPONENTS. : CONNECTER COLOUR FOR PRINTED CIRCUIT BOARD. t˚ IN CASE OF SIMULTANEOUS t˚ t˚ OPERATION SYSTEM INDOOR UNIT INDOOR UNIT ( MASTER ) ( SLAVE )

  • Page 389: Outdoor Units

    Wiring Diagrams Si12-619A Outdoor Units 2.2.1 Cooling only 3MKS58EVMA, 3MKS50ESG MRM20 POWER SUPPLY 3.15A MRM10 6(P) 7(N) TO INDOOR UNIT X11A ROOM B 3.15A ROOM A PCB1 ROOM C S101 SHEET METAL t° t° t° t° t° t° t° t° t°...
  • Page 390 Si12-619A Wiring Diagrams 4MKS90EVMA, 4MKS100EVLT, 4MKS80ESG MRM20 POWER SUPPLY 3.15A V100 MRM10 6 ( P ) 7 ( N ) TO INDOOR UNIT X11A ROOM B 3.15A ROOM A PCB1 ROOM C S101 S80 1 ROOM D t° t° t° t°...
  • Page 391 Wiring Diagrams Si12-619A 3MKS50DVM FU201 MID2 3.15A FIELD WIRING MRM20 MRM10 CT1 H2 TO INDOOR UNIT CN11 ROOM A R12T MID1 CN14 3.15A t° ROOM B ROOM C 12 1 S101 5 1 1 S90 t° t° t° t° t° t° t°...
  • Page 392 Si12-619A Wiring Diagrams 2.2.2 Heat Pump 3MXS52EVMA MRM20 POWER SUPPLY 3.15A MRM10 6(P) 7(N) TO INDOOR UNIT X11A ROOM B 3.15A ROOM A PCB1 ROOM C S101 SHEET METAL t° t° t° t° t° t° t° t° t° 1 S102 indoor PCB2 R10T...
  • Page 393 Wiring Diagrams Si12-619A 4MXS80EVMA, 4MXS100EVLT MRM20 POWER SUPPLY 3.15A V100 MRM10 6 ( P ) 7 ( N ) TO INDOOR UNIT X11A ROOM B 3.15A ROOM A PCB1 ROOM C S101 t° t° t° t° t° t° t° t° t°...

  • Page 394: Index

    Si12-619A Index Numerics compressor overload..........225 compressor protection function ......103 3-minute stand-by ..........103 compressor sensor system abnormality....236 connection pipe condensation preventing function ..............116 A1................211 connectors....52, 54, 56, 58, 61, 64, 67, 70, 73 A5..............212, 222 control PCB .......... 285, 309, 340 A6..............214, 215 control PCB (A1P) ..........
  • Page 395 Si12-619A E7 ..............228 FU2 ............67, 70, 73 E8 ..............229 FU201 .............. 70, 73 EA ..............231 FU3 ................ 67 F3 ..............233 functions ..............2 F6 ..............234 fuse ......52, 54, 56, 58, 61, 67, 70, 73 H0 ..............236 H6 ..............238 H8 ..............239 gas pipe isothermal control during cooling ...
  • Page 396 Si12-619A PCB .............. 308, 340 photocatalytic deodorizing filter ......92 L1 ..............71, 74 PI control .............. 101 L2 ..............71, 74 piping diagrams ............ 360 L3 ..............243, 245 position sensor abnormality ......... 238 L4 ..............247, 249 power failure recovery function ..52, 54, 56, 58, 61 L5 ................251 power supply PCB..........
  • Page 397 Si12-619A fan motor ........290, 311, 344 S93 ..... 67, 70, 73, 280, 297, 305, 314, 336 four way valve.........300, 315 SC control ............110 four way valve coil ........296, 313 self-diagnosis digital display........93 outer panels ..........303, 318 sensor malfunction detection ....... 112 panels and plates ...........272 service check function ..........
  • Page 398 Si12-619A U................70, 73 U0..............253, 255 U2................257 U4................219 U7................258 UA ..............221, 259 UH .................259 unspecified voltage (between indoor and outdoor units) ............221, 259 V................70, 73 V1............52, 54, 56, 58, 61 V100................67 V11................67 V2..............67, 70, 73 V3..............67, 70, 73 V5..............67, 70, 73 V6................67 V9................67 varistor ......52, 54, 56, 58, 61, 67, 70, 73...
  • Page 399 Si12-619A Index...

  • Page 400: Drawings & Flow Charts

    Si12-619A Drawings & Flow Charts Numerics frequency principle ..........78 function of thermistor ..........95 3-D airflow ..............80 cooling only model .......... 97 heat pump model ..........95 anti-icing function in other rooms ......259 ARC433 ..............205 Hall IC check ............269 automatic air flow control ........81 heating peak-cut control ........
  • Page 401 Si12-619A power supply waveforms check ......266 power transistor ........... 358 piping diagrams power transistor check ........267 3MKS50DVM ..........366 priority room setting ..........116 3MKS50ESG ..........367 programme dry function ........82 3MKS58EVMA ..........364 3MKS71ESG ..........364 3MKS75EVMA ..........364 radiation fin temperature rise ......247 3MKS90EVLT ..........365 remote controller ..........
  • Page 402 Si12-619A CDXS25/35EAVMA ........373 FDKS25/35CAVMB ........373 FDKS25/35EAVMB ........373 FDKS50/60CVMB ..........373 FDXS25/35/50/60CVMA ........373 FFQ25B8V1B ..........375 FFQ35B8V1B ..........375 FFQ50B8V1B ..........375 FFQ60B8V1B ..........375 FLXS25BVMA ..........374 FLXS35BVMA ..........374 FLXS50BVMA ..........374 FLXS60BVMA ..........374 FTK(X)S20/25/35DVMT ........371 FTK(X)S20DVMA ..........370 FTK(X)S25/35EVMA ........370 FTK(X)S50/60/71FVLT ........372 FTK(X)S50/60/71FVMA .........371 FTK(X)S50DVMT ..........370 FTK(X)S60/71DVMT ........371 FTKS25/35DVM ..........370 FTKS50/60/71FVM ........371 FTKS50BVMB ..........370...
  • Page 403 Specifications, designs and other content appearing in this brochure are current as of April 2007 but subject to change without notice. Si 12-619A Printed in Japan 04/2007 B AK...

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