Daikin Super Multi NX B series Service Manual
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Daikin Super Multi NX B series Service Manual

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Si12-308
Service
Manual
B-Series
[Applied Models]
Inverter Multi : Cooling Only
Inverter Multi : Heat Pump

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Summary of Contents for Daikin Super Multi NX B series

  • Page 1 Si12-308 Service Manual B-Series [Applied Models] Inverter Multi : Cooling Only Inverter Multi : Heat Pump...
  • Page 2 Si12-308 SUPER MULTI NX SUPER MULTI NX SUPER MULTI NX SUPER MULTI NX B-Series B-Series B-Series B-Series Cooling Only Indoor Unit FTKE25BVM FTKE25BVMA FTKE25BVMT FTKS25BVMB FLKS25BVMB FTKE35BVM FTKE35BVMA FTKE35BVMT FTKS35BVMB FLKS35BVMB FTKD50BVM FTKD50BVMA FTKD50BVMT FTKS50BVMB FLKS50BVMB FTKD60BVM FTKD60BVMA FTKD60BVMT FTKS60BVMB FLKS60BVMB FTKD71BVM FTKD71BVMA FTKD71BVMT FTKS71BVMB FVKS25BVMB CDK25AVM...

  • Page 3: Table Of Contents

    Si12-308 1. Introduction ................... vii 1.1 Safety Cautions ..................vii Part 1 List of Functions ..............1 1. List of Functions ..................2 1.1 Cooling Only Models ................2 1.2 Heat Pump Models.................10 Part 2 Specifications ..............19 1. Specifications ..................20 1.1 Indoor Units - Cooling Only ..............20 1.2 Outdoor Units - Cooling Only ..............34 1.3 Indoor Units - Heat Pump...............41 1.4 Outdoor Units - Heat Pump ..............55...
  • Page 4 Si12-308 3.8 Fan Control.....................98 3.9 Moisture Protection Function 2...............98 3.10 Defrost Control ..................99 3.11 Low Hz High Pressure Limit ..............99 3.12 Electronic Expansion Valve Control .............100 3.13 Malfunctions ..................105 3.14 Forced Operation Mode ...............106 3.15 Wiring-Error Check................107 3.16 Additional Function................109 Part 5 System Configuration.............
  • Page 5 Si12-308 5.14 Input Over Current Detection ...............187 5.15 Four Way Valve Abnormality..............189 5.16 Discharge Pipe Temperature Control...........191 5.17 Position Sensor Abnormality ..............192 5.18 CT or Related Abnormality ..............193 5.19 Thermistor or Related Abnormality (Outdoor Unit).......195 5.20 Electrical Box Temperature Rise............197 5.21 Radiation Fin Temperature Rise ............199 5.22 Output Over Current Detection.............201 5.23 Insufficient Gas..................203...
  • Page 6 Si12-308 Part 9 Appendix................. 261 1. Piping Diagrams..................262 1.1 Indoor Units ..................262 1.2 Outdoor Units ..................268 2. Wiring Diagrams..................275 2.1 Indoor Units ..................275 2.2 Outdoor Units ..................280 Index ..................... i Drawings & Flow Charts ..............v Table of Contents...
  • Page 7 Si12-308 Table of Contents...

  • Page 8: Introduction

    Si12-308 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: Cautions Regarding Products After Repair

    Introduction Si12-308 Caution Do not repair the electrical components with wet hands. Working on the equipment with wet hands can cause an electrical shock. Do not clean the air conditioner by splashing water. Washing the unit with water can cause an electrical shock. Be sure to provide the grounding when repairing the equipment in a humid or wet place, to avoid electrical shocks.

  • Page 10: Inspection After Repair

    Si12-308 Introduction Warning Be sure to use an exclusive power circuit for the equipment, and follow the technical standards related to the electrical equipment, the internal wiring regulations and the instruction manual for installation when conducting electrical work. Insufficient power circuit capacity and improper electrical work can cause an electrical shock or fire.

  • Page 11: Using Icons

    Introduction Si12-308 Warning Do not use a joined power cable or extension cable, or share the same power outlet with other electrical appliances, since it can cause an electrical shock, excessive heat generation or fire. Caution Check to see if the parts and wires are mounted and connected properly, and if the connections at the soldered or crimped terminals are secure.

  • Page 12: Part 1 List Of Functions

    Si12-308 Part 1 Part 1 Part 1 Part 1 List of Functions List of Functions List of Functions List of Functions 1. List of Functions ..................2 1.1 Cooling Only Models ................2 1.2 Heat Pump Models.................10 List of Functions...

  • Page 13: List Of Functions

    List of Functions Si12-308 1. List of Functions Cooling Only Models Category Functions Category Functions Basic Inverter Health & Air Purifying Filter with Function (with Inverter Power Control) Clean Bacteriostatic & Virustatic — — Functions Operation Limit for Cooling (°CDB) — —...
  • Page 14 Si12-308 List of Functions Category Functions Category Functions Basic Inverter Health & Air Purifying Filter with Function (with Inverter Power Control) Clean Bacteriostatic & Virustatic — Functions Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — — Operation Limit for Heating Air Purifying Filter with (°CWB) —...
  • Page 15 List of Functions Si12-308 Category Functions Category Functions Basic Inverter Health & Air Purifying Filter with Function (with Inverter Power Control) Clean Bacteriostatic & Virustatic — — Functions Operation Limit for Cooling (°CDB) — — — Photocatalytic Deodorizing Filter — — Operation Limit for Heating Air Purifying Filter with (°CWB)
  • Page 16 Si12-308 List of Functions Category Functions Category Functions Basic Inverter Health & Air Purifying Filter with Function (with Inverter Power Control) Clean Bacteriostatic & Virustatic — Functions Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — — Operation Limit for Heating Air Purifying Filter with (°CWB) —...
  • Page 17 List of Functions Si12-308 Category Functions Category Functions Basic Inverter Health & Air Purifying Filter with Function (with Inverter Power Control) Clean Bacteriostatic & Virustatic — Functions Operation Limit for Cooling (°CDB) — — Photocatalytic Deodorizing Filter — Operation Limit for Heating Air Purifying Filter with (°CWB) —...
  • Page 18 Si12-308 List of Functions Category Functions Category Functions Basic Inverter Health & Air Purifying Filter with Function (with Inverter Power Control) Clean Bacteriostatic & Virustatic — Functions Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — Operation Limit for Heating Air Purifying Filter with (°CWB) —...
  • Page 19 List of Functions Si12-308 Category Functions Category Functions Basic Inverter Health & Air Purifying Filter with Function (with Inverter Power Control) Clean Bacteriostatic & Virustatic — — Functions Operation Limit for Cooling (°CDB) — — — Photocatalytic Deodorizing Filter — — Operation Limit for Heating Air Purifying Filter with (°CWB)
  • Page 20 Si12-308 List of Functions Category Functions Category Functions Basic Inverter Health & Air Purifying Filter with Function (with Inverter Power Control) Clean Bacteriostatic & Virustatic — Functions Operation Limit for Cooling –10 Photocatalytic Deodorizing (°CDB) — — Filter — Operation Limit for Heating Air Purifying Filter with (°CWB) —...

  • Page 21: Heat Pump Models

    List of Functions Si12-308 Heat Pump Models Category Functions Category Functions Basic Inverter Health & Air Purifying Filter with Function (with Inverter Power Control) Clean Bacteriostatic & Virustatic — — Functions Operation Limit for Cooling (°CDB) — — — Photocatalytic Deodorizing Filter —...
  • Page 22 Si12-308 List of Functions Category Functions Category Functions Basic Inverter Health & Air Purifying Filter with Function (with Inverter Power Control) Clean Bacteriostatic & Virustatic — Functions Operation Limit for Cooling (°CDB) –10 Photocatalytic Deodorizing Filter — Operation Limit for Heating –15 Air Purifying Filter with (°CWB)
  • Page 23 List of Functions Si12-308 Category Functions Category Functions Basic Inverter Health & Air Purifying Filter with Function (with Inverter Power Control) Clean Bacteriostatic & Virustatic — — Functions Operation Limit for Cooling (°CDB) — — — Photocatalytic Deodorizing Filter — — Operation Limit for Heating Air Purifying Filter with (°CWB)
  • Page 24 Si12-308 List of Functions Category Functions Category Functions Basic Inverter Health & Air Purifying Filter with Function (with Inverter Power Control) Clean Bacteriostatic & Virustatic — Functions Operation Limit for Cooling (°CDB) –10 Photocatalytic Deodorizing Filter — — Operation Limit for Heating –15 Air Purifying Filter with (°CWB)
  • Page 25 List of Functions Si12-308 Category Functions Category Functions Basic Inverter Health & Air Purifying Filter with Function (with Inverter Power Control) Clean Bacteriostatic & Virustatic — Functions Operation Limit for Cooling (°CDB) — — Photocatalytic Deodorizing Filter — Operation Limit for Heating Air Purifying Filter with (°CWB) —...
  • Page 26 Si12-308 List of Functions Category Functions Category Functions Basic Inverter Health & Air Purifying Filter with Function (with Inverter Power Control) Clean Bacteriostatic & Virustatic — Functions Operation Limit for Cooling (°CDB) –10 Photocatalytic Deodorizing Filter — Operation Limit for Heating –15 Air Purifying Filter with (°CWB)
  • Page 27 List of Functions Si12-308 Category Functions Category Functions Basic Inverter Health & Air Purifying Filter with Function (with Inverter Power Control) Clean Bacteriostatic & Virustatic — — Functions Operation Limit for Cooling (°CDB) — — — Photocatalytic Deodorizing Filter — — Operation Limit for Heating Air Purifying Filter with (°CWB)
  • Page 28 Si12-308 List of Functions Category Functions Category Functions Basic Inverter Health & Air Purifying Filter with Function (with Inverter Power Control) Clean Bacteriostatic & Virustatic — Functions Operation Limit for Cooling –10 Photocatalytic Deodorizing (°CDB) — — Filter — Operation Limit for Heating –15 Air Purifying Filter with (°CWB)
  • Page 29 List of Functions Si12-308 List of Functions...

  • Page 30: Part 2 Specifications

    Si12-308 Part 2 Part 2 Part 2 Part 2 Specifications Specifications Specifications Specifications 1. Specifications ..................20 1.1 Indoor Units - Cooling Only ..............20 1.2 Outdoor Units - Cooling Only ..............34 1.3 Indoor Units - Heat Pump...............41 1.4 Outdoor Units - Heat Pump ..............55 Specifications...

  • Page 31: Specifications

    Specifications Si12-308 1. Specifications Indoor Units - Cooling Only Wall Mounted Type 50Hz 220-230-240V / 60Hz 220-230V Model FTKE25BVM FTKE35BVM Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color White White 7.8 (275) 7.7 (272) 6.4 (226) 6.3 (222) m³/min Air Flow Rates (cfm) 5.0 (177)
  • Page 32 Si12-308 Specifications 50Hz 220-230-240V / 60Hz 220-230V Model FTKD71BVM Rated Capacity 7.1kW Class Front Panel Color White 18.0 (635) 15.1 (533) m³/min Air Flow Rates (cfm) 12.7 (448) 11.3 (399) Type Cross Flow Fan Motor Output Speed Steps 5 Steps, Silent and Auto Air Direction Control Right, Left, Horizontal and Downward Air Filter...
  • Page 33 Specifications Si12-308 Wall Mounted Type 50Hz 220-230-240V / 60Hz 220-230V Model FTKE25BVMA FTKE35BVMA Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color White White 7.8 (275) 7.7 (272) 6.4 (226) 6.3 (222) m³/min Air Flow Rates (cfm) 5.0 (177) 4.9 (173) 4.3 (152) 4.4 (155) Type...
  • Page 34 Si12-308 Specifications 50Hz 220-230-240V / 60Hz 220-230V Model FTKD71BVMA Rated Capacity 7.1kW Class Front Panel Color White 18.3 (646) 15.3 (540) m³/min Air Flow Rates (cfm) 12.7 (448) 11.3 (399) Type Cross Flow Fan Motor Output Speed Steps 5 Steps, Silent and Auto Air Direction Control Right, Left, Horizontal and Downward Air Filter...
  • Page 35 Specifications Si12-308 Wall Mounted Type 60Hz 220V Model FTKE25BVMT FTKE35BVMT Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color White White 7.8 (275) 7.8 (275) 6.4 (226) 6.4 (226) m³/min Air Flow Rates (cfm) 5.0 (177) 5.0 (177) 4.4 (155) 4.4 (155) Type Cross Flow Fan...
  • Page 36 Si12-308 Specifications 60Hz 220V Model FTKD71BVMT Rated Capacity 7.1kW Class Front Panel Color White 16.6 (586) 13.9 (491) m³/min Air Flow Rates (cfm) 11.7 (413) 10.4 (367) Type Cross Flow Fan Motor Output Speed Steps 5 Steps, Silent and Auto Air Direction Control Right, Left, Horizontal and Downward Air Filter...
  • Page 37 Specifications Si12-308 Wall Mounted Type 230V, 50Hz Model FTKS25BVMB FTKS35BVMB Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color White White 7.4 (261) 7.4 (261) 5.8 (205) 5.9 (208) m³/min Air Flow Rates (cfm) 4.1 (145) 4.4 (155) 3.6 (127) 3.8 (134) Type Cross Flow Fan...
  • Page 38 Si12-308 Specifications 230V, 50Hz 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, Silent and Auto Air Direction Control Right, Left, Horizontal and Downward Air Filter...

  • Page 39: Duct Connected Type

    Specifications Si12-308 Duct Connected Type 50Hz 220-230-240V / 60Hz 220-230V Model CDK25AVM CDK35AVM Rated Capacity 2.5kW Class 3.5kW Class — — Front Panel Color 13.0 (459) 13.0 (459) 12.0 (424) 12.0 (424) m³/min Air Flow Rates (cfm) 11.0 (388) 11.0 (388) 9.3 (328) 9.3 (328) Type...
  • Page 40 Si12-308 Specifications Duct Connected Type 50Hz 220-230-240V / 60Hz 220-230V Model CDK25AVMA CDK35AVMA Rated Capacity 2.5kW Class 3.5kW Class — — Front Panel Color 13.0 (459) 13.0 (459) 12.0 (424) 12.0 (424) m³/min Air Flow Rates (cfm) 11.0 (388) 11.0 (388) 9.3 (328) 9.3 (328) Type...
  • Page 41 Specifications Si12-308 Duct Connected Type 230V, 50Hz Model CDKS25BVMB CDKS35BVMB Rated Capacity 2.5kW Class 3.5kW Class — — Front Panel Color 12.7 (448) 13.0 (459) 11.7 (413) 12.0 (424) m³/min Air Flow Rates (cfm) 10.7 (378) 11.0 (388) 9.0 (318) 9.3 (328) Type Sirocco Fan...
  • Page 42 Si12-308 Specifications Floor / Ceiling Suspended Dual Type 50Hz 220-230-240V / 60Hz 220-230V Model FLK25AVMA FLK35AVMA Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color Almond White Almond White 7.6 (268) 8.7 (307) 6.8 (240) 7.7 (272) m³/min Air Flow Rates (cfm) 6.0 (212) 6.6 (233)
  • Page 43 Specifications Si12-308 Floor / Ceiling Suspended Dual Type 230V, 50Hz Model FLKS25BVMB FLKS35BVMB Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color Almond White Almond White 7.6 (268) 8.6 (304) 6.8 (240) 7.6 (268) m³/min Air Flow Rates (cfm) 6.0 (212) 6.6 (233) 5.2 (184) 5.6 (198)

  • Page 44: Floor Standing Type

    Si12-308 Specifications Floor Standing Type 230V, 50Hz Model FVKS25BVMB FVKS35BVMB Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color Almond White Almond White 8.1 (286) 8.3 (293) 6.2 (219) 6.3 (222) m³/min Air Flow Rates (cfm) 4.3 (152) 4.3 (152) 3.4 (120) 3.4 (120) Type...

  • Page 45: Outdoor Units - Cooling Only

    Specifications Si12-308 Outdoor Units - Cooling Only 50Hz 220-230-240V / 60Hz 220-230V Model 2MKD58BVM 3MKD58BVM — — Cooling Capacity — — Power Consumption — — Running Current Casing Color Ivory White Ivory White Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Compressor Model 2YC32WXD...
  • Page 46 Si12-308 Specifications 50Hz 220-230-240V / 60Hz 220-230V Model 3MKD75BVM 4MKD75BVM — — Cooling Capacity — — Power Consumption — — Running Current Casing Color Ivory White Ivory White Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Compressor Model 2YC45ZXD 2YC45ZXD Motor Output 1,380...
  • Page 47 Specifications Si12-308 50Hz 220-230-240V / 60Hz 220-230V Model 4MKD90BVM — Cooling Capacity — Power Consumption — Running Current Casing Color Pale Ivory Type Hermetically Sealed Swing Type Compressor Model 2YC45ZXD Motor Output 1,380 Model SUNISO 4GSD.I. Refrigerant Oil Charge 0.75 Type Refrigerant Charge...
  • Page 48 Si12-308 Specifications 50Hz 220-240V / 60Hz 220-230V Model 3MKD75BVMA 4MKD90BVMA — — Cooling Capacity — — Power Consumption — — Running Current Casing Color Ivory White Pale Ivory Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Compressor Model 2YC45ZXD 2YC45ZXD Motor Output 1,380...
  • Page 49 Specifications Si12-308 60Hz 220V Model 3MKD75BVMT 4MKD90BVMT — — Cooling Capacity — — Power Consumption — — Running Current Casing Color Ivory White Pale Ivory Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Compressor Model 2YC45ZXD 2YC45ZXD Motor Output 1,380 1,380 Model...
  • Page 50 Si12-308 Specifications 230V, 50Hz Model 3MKS50BVMB 4MKS58BVMB — — Cooling Capacity — — Power Consumption — — Running Current Casing Color Ivory White Ivory White Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Compressor Model 2YC32HXD 2YC32HXD Motor Output Model FVC50K FVC50K...
  • Page 51 Specifications Si12-308 230V, 50Hz Model 4MKS75BVMB 4MKS90BVMB — — Cooling Capacity — — Power Consumption — — Running Current Casing Color Ivory White Ivory White Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Compressor Model 2YC45BXD 2YC45BXD Motor Output 1,380 1,380 Model...

  • Page 52: Indoor Units - Heat Pump

    Si12-308 Specifications Indoor Units - Heat Pump Wall Mounted Type 50Hz 220V FTXE25BVMC FTXE35BVMC Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color White White 7.8 (275) 8.1 (286) 7.7 (272) 8.1 (286) 6.4 (226) 6.6 (233) 6.3 (222) 6.6 (233)
  • Page 53 Specifications Si12-308 50Hz 220V FTXD71BVMC Model Cooling Heating Rated Capacity 7.1kW Class Front Panel Color White 18.0 (635) 19.8 (700) 15.1 (533) 17.1 (602) m³/min Air Flow Rates (cfm) 12.7 (448) 14.4 (510) 11.3 (399) 12.6 (446) Type Cross Flow Fan Motor Output Speed Steps...
  • Page 54 Si12-308 Specifications Wall Mounted Type 50Hz 220-230-240V / 60Hz 220-230V FTXE25BVMA FTXE35BVMA Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color White Almond White 7.8 (275) 8.1 (286) 7.7 (272) 8.1 (286) 6.4 (226) 6.6 (233) 6.3 (222) 6.6 (233) m³/min...
  • Page 55 Specifications Si12-308 50Hz 220-230-240V / 60Hz 220-230V FTXD71BVMA Model Cooling Heating Rated Capacity 7.1kW Class Front Panel Color White 18.3 (646) 19.8 (699) 15.3 (540) 17.1 (604) m³/min Air Flow Rates (cfm) 12.7 (448) 14.4 (508) 11.3 (399) 12.6 (445) Type Cross Flow Fan Motor Output...
  • Page 56 Si12-308 Specifications Wall Mounted Type 60Hz 220V FTXE25BVMT FTXE35BVMT Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color White White 7.8 (275) 8.1 (286) 7.8 (275) 8.1 (286) 6.4 (226) 6.6 (233) 6.6 (233) 6.7 (237) m³/min Air Flow Rates (cfm)
  • Page 57 Specifications Si12-308 60Hz 220V FTXD71BVMT Model Cooling Heating Rated Capacity 7.1kW Class Front Panel Color White 16.6 (586) 18.2 (642) 13.9 (491) 15.7 (554) m³/min Air Flow Rates (cfm) 11.7 (413) 13.3 (469) 10.4 (367) 11.7 (413) Type Cross Flow Fan Motor Output Speed Steps...
  • Page 58 Si12-308 Specifications Wall Mounted Type 230V, 50Hz FTXS25BVMB FTXS35BVMB Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color White White 7.4 (261) 7.5 (265) 7.4 (261) 7.5 (265) 5.8 (205) 6.3 (222) 5.9 (208) 6.3 (222) m³/min Air Flow Rates (cfm)
  • Page 59 Specifications Si12-308 230V, 50Hz FTXS71BVMB Model Cooling Heating Rated Capacity 7.1kW Class Front Panel Color White 16.7 (590) 18.5 (653) 14.2 (501) 15.1 (533) m³/min Air Flow Rates (cfm) 11.6 (409) 13.5 (477) 10.6 (374) 12.1 (427) Type Cross Flow Fan Motor Output Speed Steps...
  • Page 60 Si12-308 Specifications Duct Connected Type 50Hz 220V CDX25BVMC CDX35BVMC Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class — — Front Panel Color 10.4 (367) 10.4 (367) 11.0 (388) 11.0 (388) 9.6 (339) 9.6 (339) 10.2 (360) 10.2 (360) m³/min Air Flow Rates (cfm)
  • Page 61 Specifications Si12-308 Duct Connected Type 50Hz 220-230-240V / 60Hz 220-230V CDX25AVMA CDX35AVMA Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class — — Front Panel Color 13.0 (459) 13.0 (459) 13.0 (459) 13.0 (459) 12.0 (424) 12.0 (424) 12.0 (424) 12.0 (424) m³/min...
  • Page 62 Si12-308 Specifications Duct Connected Type 230V, 50Hz CDXS25BVMB CDXS35BVMB Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class — — Front Panel Color 12.7 (448) 12.7 (448) 13.0 (459) 13.0 (459) 11.7 (413) 11.7 (413) 12.0 (424) 12.0 (424) m³/min Air Flow Rates (cfm)
  • Page 63 Specifications Si12-308 Floor / Ceiling Suspended Dual Type 50Hz 220-230-240V / 60Hz 220-230V FLX25AVMA FLX35AVMA Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color Almond White Almond White 7.6 (268) 9.2 (325) 8.7 (307) 10.0 (353) 6.8 (240) 8.3 (293) 7.7 (272)
  • Page 64 Si12-308 Specifications Floor / Ceiling Suspended Dual Type 230V, 50Hz FLXS25BVMB FLXS35BVMB 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 65 Specifications Si12-308 Floor Standing Type 230V, 50Hz FVXS25BVMB FVXS35BVMB Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color Almond White Almond White 8.1 (286) 9.2 (325) 8.3 (293) 9.2 (325) 6.2 (219) 7.0 (247) 6.3 (222) 7.1 (251) m³/min Air Flow Rates...

  • Page 66: Outdoor Units - Heat Pump

    Si12-308 Specifications Outdoor Units - Heat Pump 50Hz 220V 3MXD68BVMC 4MXD80BVMC Model Cooling Heating Cooling Heating — — Cooling Capacity — — Power Consumption — — Running Current Casing Color Ivory White Pale Ivory Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Compressor Model 2YC45YXD...
  • Page 67 Specifications Si12-308 50Hz 220-240V / 60Hz 220-230V 3MXD68BVMA 4MXD80BVMA Model Cooling Heating Cooling Heating — — Cooling Capacity — — Power Consumption — — Running Current Casing Color Ivory White Pale Ivory Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Compressor Model 2YC45ZXD...
  • Page 68 Si12-308 Specifications 60Hz 220V 3MXD68BVMT 4MXD80BVMT Model Cooling Heating Cooling Heating — — Cooling Capacity — — Power Consumption — — Running Current Casing Color Ivory White Pale Ivory Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Compressor Model 2YC45ZXD 2YC45ZXD Motor Output...
  • Page 69 Specifications Si12-308 230V, 50Hz 3MXS52BVMB 4MXS68BVMB 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 2YC32HXD 2YC45BXD Motor Output...
  • Page 70 Si12-308 Specifications 230V, 50Hz 4MXS80BVMB Model Cooling Heating — Cooling Capacity — Power Consumption — Running Current Casing Color Pale Ivory Type Hermetically Sealed Swing Type Compressor Model 2YC45BXD Motor Output 1,380 Model FVC50K Refrigerant Oil Charge 0.75 Type R410A Refrigerant Charge 48.5...
  • Page 71 Specifications Si12-308 Specifications...

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

    Si12-308 Part 3 Part 3 Part 3 Part 3 Printed Circuit Board Printed Circuit Board Printed Circuit Board Printed Circuit Board Connector Wiring Diagram Connector Wiring Diagram Connector Wiring Diagram Connector Wiring Diagram 1. Printed Circuit Board Connector Wiring Diagram........62 1.1 Wall Mounted Type 25 / 35 Class ............62 1.2 Wall Mounted Type 50 / 60 / 71 Class ...........65 1.3 Floor / Ceiling Suspended Dual Type.............67...

  • Page 73: Printed Circuit Board Connector Wiring Diagram

    Printed Circuit Board Connector Wiring Diagram Si12-308 Printed Circuit Board Connector Wiring Diagram Wall Mounted Type 25 / 35 Class Connectors Connector for fan motor Connector for swing motor (Horizontal Flap) Connector for fan motor Connector for centralized control to 5 rooms Connector for signal receiver PCB Connector for control PCB Connector for heat exchanger thermistor...
  • Page 74 Si12-308 Printed Circuit Board Connector Wiring Diagram PCB(1) Control PCB (2) Signal reciever 5V Check 12V Check PCB (3) Intelligent eye sensor (R2413) Printed Circuit Board Connector Wiring Diagram...
  • Page 75 Printed Circuit Board Connector Wiring Diagram Si12-308 PCB Detail Printed Circuit Board Connector Wiring Diagram...

  • Page 76: Wall Mounted Type 50 / 60 / 71 Class

    Si12-308 Printed Circuit Board Connector Wiring Diagram Wall Mounted Type 50 / 60 / 71 Class Connectors Connector for fan motor Connector for swing motor (horizontal blades) Connector for swing motor (vertical blades) Connector for centralized control (HA) 5) S26, Connector for buzzer PCB 6) S27, S29, Connector for control PCB...

  • Page 77: Control Pcb (Indoor Unit)

    Printed Circuit Board Connector Wiring Diagram Si12-308 PCB Detail PCB(1): Control PCB (indoor unit) (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 78: Floor / Ceiling Suspended Dual Type

    Si12-308 Printed Circuit Board Connector Wiring Diagram Floor / Ceiling Suspended Dual Type Connectors Connector for Swing Motor (Horizontal Swing) Connector for Fan Motor Connector for Swing Motor (Vertical Swing) Connector for Centralized Control Connector for Display PCB 6) S25, S27, Connector for Control PCB Connector for Signal Receiver PCB Connector for Room Temp.
  • Page 79 Printed Circuit Board Connector Wiring Diagram Si12-308 Power Supply PCB (PCB 2) Display PCB (PCB 3) Signal Receiver PCB (PCB 4) Printed Circuit Board Connector Wiring Diagram...

  • Page 80: Duct Connected Type

    Si12-308 Printed Circuit Board Connector Wiring Diagram Duct Connected Type Connectors (on PCB 1) Connector for fan motor 2) S1 (on PCB 2) Connector for control PCB Connector for fan motor Connector for centralized control to 5 rooms Connector for display PCB Connector for room temp / Heat exchanger thermistor Note: Other designations...

  • Page 81: Floor Standing Type

    Printed Circuit Board Connector Wiring Diagram Si12-308 Floor Standing Type Connectors Connector for Swing Motor and Lower Air outlet Motor Connector for HA Connector for signal receiver 4) S31, Connector for Room Temp / Heat Exchanger Thermistor 5) S201, S203, Connector for Power Supply PCB (1) S7, S24, 6) S202, S204,...
  • Page 82 Si12-308 Printed Circuit Board Connector Wiring Diagram Control PCB (PCB 2) Display PCB (PCB 3) Signal Receiver PCB (PCB 4) Printed Circuit Board Connector Wiring Diagram...

  • Page 83: Outdoor Units

    Printed Circuit Board Connector Wiring Diagram Si12-308 Outdoor Units Connectors 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 Connector for CN11 Connector for S34...

  • Page 84: Part 4 Function And Control

    Si12-308 Part 4 Part 4 Part 4 Part 4 Function and Control Function and Control Function and Control Function and Control 1. Main Functions..................74 1.1 Frequency Principle................74 1.2 Power-Airflow Dual Flaps, Wide Angle Louvers and Auto-Swing ..76 1.3 Fan Speed Control for Indoor Units............77 1.4 Programme Dry Function ...............78 1.5 Automatic Operation................79 1.6 Night Set Mode..................80...

  • Page 85: Main Functions

    Main Functions Si12-308 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 86 Si12-308 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 87: Power-Airflow Dual Flaps, Wide Angle Louvers And Auto-Swing

    Main Functions Si12-308 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 88: Fan Speed Control For Indoor Units

    Si12-308 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 phase control and hall IC control. For more information about hall IC, refer to the troubleshooting for fan motor on page 176.

  • Page 89: Programme Dry Function

    Main Functions Si12-308 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 90: Automatic Operation

    Si12-308 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 91: Night Set Mode

    Main Functions Si12-308 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 lowers the temperature setting slightly in the case of cooling, or raises it slightly in the case of heating, for economical operations.

  • Page 92: Intelligent Eye

    Si12-308 Main Functions Intelligent Eye This is the function that detects existence of humans in the room by a human motion sensor (Intelligent Eye) and reduces the capacity when there is no human in the room in order to save electricity.
  • Page 93 Main Functions Si12-308 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 94: Home Leave Operation

    Si12-308 Main Functions 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 95: Inverter Powerful Operation

    Main Functions Si12-308 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 96: Other Functions

    Si12-308 Main Functions 1.10 Other Functions 1.10.1 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 97 Main Functions Si12-308 1.10.8 Self-Diagnosis Digital Display The microcomputer continuously monitors main operating conditions of the indoor unit, outdoor unit and the entire system. When an abnormality occur, the LCD remote controller displays error code. These indications allow prompt maintenance operations. 1.10.9 Auto-restart Function Even if a power failure (including one for just a moment) occurs during the operation, the...

  • Page 98: Function Of Main Structural Parts

    Si12-308 Function of Main Structural Parts 2. Function of Main Structural Parts Main Structural Parts 1. Compressor A Swing compressor, being operated by INV control. Heat Pump Model Expansion valve Receiver Solenoid valve Four-way valve (R2433) Compressor Cooling Only Model Expansion valve Compressor (R2434)

  • Page 99: Function Of Thermistor

    Function of Main Structural Parts Si12-308 Function of Thermistor 2.2.1 Heat Pump Model Expansion valve Receiver Solenoid valve Four-way valve Compressor (R2435) A Outdoor Heat 1. An outdoor heat exchanger thermistor is used for controlling a target discharge temperature. Set a target discharge temperature depending on an outdoor and indoor heat exchanger Exchanger temperature.
  • Page 100 Si12-308 Function of Main Structural Parts D Indoor Heat 1. An indoor heat exchanger thermistor is used for controlling target discharge pipe temperature. Exchanger Set a target discharge pipe temperature according to the outdoor and indoor heat exchanger Thermistor (DCN) temperature.

  • Page 101: Cooling Only Model

    Function of Main Structural Parts Si12-308 2.2.2 Cooling Only Model Expansion valve Compressor (R2436) A Outdoor Heat 1. An outdoor heat exchanger thermistor is used for controlling a target discharge temperature. Exchanger Set a target discharge temperature depending on an outdoor and indoor heat exchanger temperature.
  • Page 102 Si12-308 Function of Main Structural Parts D Indoor Heat 1. An indoor heat exchanger thermistor is used for controlling target discharge pipe temperature. Exchanger Set a target discharge pipe temperature according to the outdoor and indoor heat exchanger Thermistor (DCN) temperature.

  • Page 103: Control Specification

    Control Specification Si12-308 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 Air Conditioner’s Control Mode 1. For heat pump model There are following modes;...

  • Page 104: Frequency Control

    Si12-308 Control Specification Frequency Control Outline Frequency that corresponds to each room’s capacity will be determined according to the difference in the temperature of each room and the temperature that is set by the remote controller. The function is explained as follows. 1.
  • Page 105 Control Specification Si12-308 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 106: Controls At Mode Changing / Start-Up

    Si12-308 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 (only for heat pump model) from the indoor, the outdoor air temperature and discharge pipe temperature.

  • Page 107: Discharge Pipe Control

    Control Specification Si12-308 Discharge Pipe 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 Divide the Zone Management within the Zone...

  • Page 108: Freeze-Up Protection Control

    Si12-308 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 109: Fan Control

    Control Specification Si12-308 Fan Control Outline Fan control is carried out according to the following priority. 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 110: Defrost Control

    Si12-308 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 The starting conditions must be made with the outdoor air temperature and heat exchanger temperature.

  • Page 111: Electronic Expansion Valve Control

    Control Specification Si12-308 3.12 Electronic Expansion Valve Control Outline The following items are included in the electronic expansion valve control. Electronic expansion valve is fully closed 1. Electronic expansion valve is fully closed when turning on the power. 2. Pressure equalizing control Room Distribution Control 1.
  • Page 112 Si12-308 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 113 Control Specification Si12-308 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 114: Target Discharge Pipe Temperature Control

    Si12-308 Control Specification 3.12.8 Target Discharge Pipe Temperature Control Obtain the target discharge pipe temperature from the indoor and outdoor heat exchange temperature, and adjust the electronic expansion valve opening so that the actual discharge pipe temperature become close to that temperature. (Indirect SH control using the discharge pipe temperature) Determine a correction value of the electronic expansion valve compensation and drive it according to the deflection of the target discharge temperature and actual discharge...
  • Page 115 Control Specification Si12-308 3.12.11Control when frequency is changed When the target pipe temperature control is active, if the target frequency is changed for a specified value in a certain time period, cancel the target discharge pipe temperature control and change the opening of the target electronic expansion valve according to the shift. Function and Control...

  • Page 116: Malfunctions

    Si12-308 Control Specification 3.13 Malfunctions 3.13.1 Sensor Malfunction Detection Sensor malfunction may occur either in the thermistor or current transformer (CT) system. Relating to Thermistor Malfunction 1. Outdoor heat exchanger thermistor 2. Discharge pipe thermistor 3. Fin thermistor 4. Gas pipe thermistor 5.

  • Page 117: Forced Operation Mode

    Control Specification Si12-308 Detail Judgment by Input Current When an output frequency is exceeds 55 Hz and the input current is less than specified value, the adjustment is made for insufficient gas. Judgment by Discharge Pipe Temperature When discharge pipe temperature is 20°C higher than target value and the electronic expansion value opening is 450 plus (max.), the adjustment is made for insufficient gas.

  • Page 118: Wiring-Error Check

    Si12-308 Control Specification 3.15 Wiring-Error Check Outline The convenient Wiring Error Check function is designed for the microcomputer to correct wiring errors itself. If local wiring is unclear in the case of buried piping, for example, just press the wiring error check switch that is behind the right-hand panel of the outdoor unit.
  • Page 119 Control Specification Si12-308 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 120: Additional Function

    Si12-308 Control Specification 3.16 Additional Function 3.16.1 Connection Pipe Condensation Preventing Function This control is intended to adjust the electronic expansion valve opening so that the outdoor unit gas pipe temperature (GDN) be kept below 8°C. 3.16.2 Priority Room Setting Electronic expansion valves are controlled to provide the unit designated as the priority room with the capacity of other room units.
  • Page 121 Control Specification Si12-308 3.16.5 Cooling / Heating Mode Lock Use the S100 connector to set the unit to only cool or heat. Setting to only cool (C): Short-circuit pins 1 and 3 of the connector <S100>. Setting to only heat (H): short-circuit pins 3 and 5 of the connector <S100>. The following specifications apply to the connector housing and pins.

  • Page 122: Part 5 System Configuration

    Si12-308 Part 5 Part 5 Part 5 Part 5 System Configuration System Configuration System Configuration System Configuration 1. System Configuration................112 1.1 Operation Instructions ................112 2. Instruction....................113 2.1 Manual Contents by the Models............113 2.2 Safety Precautions ................114 2.3 Names of Parts..................116 2.4 Preparation before Operation...............128 2.5 AUTO ·...

  • Page 123: System Configuration

    System Configuration Si12-308 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 124: Instruction

    Si12-308 Instruction 2. Instruction Note: This instruction is appropriate for R22 models. Manual Contents by the Models Floor/Ceiling Duct Connected Wall Mounted Type Suspended Dual Type Type Model Series FTKE25/35B FTKD50/60/71B CDK25~60A FLK25~60A FTXE25/35B FTXD50/60/71B CDX25~60A FLX25~60A Read before Operation Safety Precautions Names of Parts Preparation before Operation #...

  • Page 125: 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 126: Installation Site

    Si12-308 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 127: Names Of Parts

    Instruction Si12-308 Names of Parts FTK(X)E 25/35 B Names of parts I Indoor Unit System Configuration...

  • Page 128: I Outdoor Unit

    Si12-308 Instruction I Outdoor Unit I I I I Indoor Unit 1. Air filter 12. Indoor Unit ON/OFF switch: • Push this switch once to start operation. 2. Photocatalytic deodorizing filter or Push once again to stop it. Air purifying filter: •...
  • Page 129 Instruction Si12-308 I Remote Controller HOME LEAVE ON/OFF TEMP POWERFUL MODE SWING SILENT SENSOR CANCEL TIMER < > ARC433A1, A2 1. Signal transmitter: (AUTO/DRY/COOL/HEAT/FAN) • It sends signals to the indoor unit. 8. SILENT button: for OUTDOOR UNIT 2. Display: SILENT operation •...
  • Page 130 Si12-308 Instruction FTK(X)D 50/60/71 B Names of parts I Indoor Unit I Main unit control panel System Configuration...
  • Page 131 Instruction Si12-308 Outdoor Unit Indoor Unit 1. Air filter 13. HOME LEAVE lamp (red): 2Lights up when you use HOME LEAVE 2. Photocatalytic deodorizing filter or Operation. Air purifying filter: 2These filters are attached to the inside of the air 14.
  • Page 132 Si12-308 Instruction I Remote Controller HOME LEAVE ON/OFF TEMP POWERFUL MODE SILENT SENSOR SWING CANCEL TIMER < > ARC433A21, A22 1. Signal transmitter: 8. SILENT button: for OUTDOOR UNIT • It sends signals to the indoor unit. SILENT operation 2. Display: 9.
  • Page 133 Instruction Si12-308 CDK(X) 25/35/50/60 A Names of parts I Indoor Unit System Configuration...
  • Page 134 Si12-308 Instruction I Outdoor Unit I I I I 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 135 Instruction Si12-308 I Remote Controller HOME LEAVE ON/OFF TEMP POWERFUL MODE SILENT CANCEL TIMER < > ARC433A7, A8 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.
  • Page 136 Si12-308 Instruction FLK(X) 25/35/50/60 A Names of parts I Indoor Unit The indoor unit can be installed either to the ceiling or to a wall. The descriptions contained in this manual show the case when installation is being carried out to the ceiling. (The methods of operation used are the same when installing to a wall.) CAUTION •...
  • Page 137 Instruction Si12-308 Outdoor Unit Indoor Unit 1. Louvres (vertical blades) 13. Indoor unit ON/OFF switch The louvres are inside of the air outlet. 2 Push this switch once to start operation. 2. Air outlet Push once again to stop it. 2 Push the switch using an object with a sharp 3.
  • Page 138 Si12-308 Instruction I Remote Controller HOME LEAVE ON/OFF TEMP POWERFUL MODE SWING SILENT CANCEL TIMER < > ARC433A5, A6 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.

  • Page 139: Preparation Before Operation

    Instruction Si12-308 Preparation before Operation Preparation Before Operation I To set the batteries Position + and – correctly! 1. Press with a finger and slide the front cover to take it off. 2. Set two dry batteries (AAA). 3. Set the front cover as before. ATTENTION I I I I About batteries •...
  • Page 140 Si12-308 Instruction Preparation Before Operation I 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 141 Instruction Si12-308 I To set the clock 1. Press “CLOCK button”. is displayed. blinks. 2. Press “TIMER setting button” to set the clock to the present time. HOME LEAVE ON/OFF Holding down “ ” or “ ” button rap- TEMP POWERFUL idly increases or decreases the time dis- play.

  • Page 142: Auto · Dry · Cool · Heat · Fan Operation

    Si12-308 Instruction AUTO · DRY · COOL · HEAT · FAN Operation AUTO · DRY · COOL · HEAT · FAN Operation The air conditioner operates with the operation mode of your choice. From the next time on, the air conditioner will operate with the same operation mode.
  • Page 143 Instruction Si12-308 I To change the air flow rate setting 5. Press “FAN setting button”. DRY mode AUTO or COOL or HEAT or FAN mode Five levels of air flow rate setting from “ ” to “ ” plus “ ”...

  • Page 144: Adjusting The Air Flow Direction

    Si12-308 Instruction Adjusting the Air Flow Direction FTK(X)E 25/35 B Adjusting the Air Flow Direction You can adjust the air flow direction to increase your com- fort. I To adjust the horizontal blades (flaps) 1. Press “SWING button”. The display will light up and the flaps will begin to swing.
  • Page 145 Instruction Si12-308 I To adjust the vertical blades (louvres) Hold the knob and move the louvres. (You will find a knob on the left-side and the right-side blades.) Notes on flaps and louvres angles • When “ SWING button ” is selected, the flaps In DRY mode or COOL mode swinging range depends on the operation mode.
  • Page 146 Si12-308 Instruction FTK(X)D 50/60/71 B Adjusting the Air Flow Direction You can adjust the air flow direction to increase your comfort. I To adjust the horizontal blade (flap) 1. Press “SWING button”. The display will light up and the flap will begin to swing.
  • Page 147 Instruction Si12-308 I To 3-D Airflow 1. 3. press “SWING button”: the “ ” “ ” display will light up and the flaps and louvers will move in turn. I To cancel 3-D Airflow 2. 4. press “SWING button” Notes on louvers angles I I I I ATTENTION •...
  • Page 148 Si12-308 Instruction FLK(X) 25/35/50/60 A Adjusting the Air Flow Direction You can adjust the air flow direction to increase your com- fort. I To adjust the horizontal blade (flap) 1. Press “SWING button”. The display will light up and the flaps will begin to swing.
  • Page 149 Instruction Si12-308 I To adjust the vertical blades (louvres) • When adjusting the louvre, use a robust and stable stool and watch your steps carefully. Hold the knob and move the louvres. (You will find a knob on the left side and the right side blades.) Notes on flap and louvres angles •...

  • Page 150: Powerful Operation

    Si12-308 Instruction POWERFUL Operation POWERFUL Operation POWERFUL operation quickly maximizes the cooling (heating) effect in any operation mode. You can get the maximum capacity . I To start POWERFUL operation 1. Press “POWERFUL button”. • POWERFUL operation ends in 20 minutes. Then the system automatically operates again with the settings which were used HOME LEAVE...

  • Page 151: Outdoor Unit Silent Operation

    Instruction Si12-308 OUTDOOR UNIT SILENT Operation OUTDOOR UNIT SILENT Operation OUTDOOR UNIT SILENT operation lowers the noise level of the outdoor unit by changing the frequency and fan speed on the outdoor unit. This function is conve- nient during night. I To start OUTDOOR UNIT SILENT operation 1.

  • Page 152: Home Leave Operation

    Si12-308 Instruction 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. I To start HOME LEAVE operation 1. Press “HOME LEAVE button” . • The HOME LEAVE lamp lights up. I To cancel HOME LEAVE 1, 2 HOME LEAVE...
  • Page 153 Instruction Si12-308 I 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 154: Intelligent Eye Operation

    Si12-308 Instruction 2.10 INTELLIGENT EYE Operation FTK(X)E 25/35 B INTELLIGENT EYE Operation “INTELLIGENT EYE” is the infrared sensor which detects the human movement. I To start INTELLIGENT EYE operation 1. Press “SENSOR button”. I To cancel the INTELLIGENT EYE HOME LEAVE ON/OFF operation TEMP...
  • Page 155 Instruction Si12-308 I To adjust the angle of the INTELLIGENT EYE sensor • You can adjust the angle of the INTELLIGENT EYE sensor to increase the detection area. (Adjustable angle: 15° to right and left of centre) INTELLIGENT EYE 15˚ 15˚...
  • Page 156 Si12-308 Instruction FTK(X)D 50/60/71 B INTELLIGENT EYE Operation “INTELLIGENT EYE” is the infrared sensor which detects the human movement. I To start INTELLIGENT EYE operation 1. Press “SENSOR button”. I To cancel the HOME LEAVE INTELLIGENT EYE ON/OFF TEMP POWERFUL operation 2.
  • Page 157 Instruction Si12-308 “INTELLIGENT EYE” is useful for Energy Saving I I I I 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 158: Timer Operation

    Si12-308 Instruction 2.11 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. I To use OFF TIMER opera- tion •...
  • Page 159 Instruction Si12-308 I To use ON TIMER operation • Check that the clock is correct. If not, set the clock to the present time. 1. Press “ON TIMER button”. is displayed. blinks. 2. Press “TIMER Setting button” until the time setting reaches the point you like.

  • Page 160: Note For Multi System

    Si12-308 Instruction 2.12 Note for Multi System Note for Multi System 〈〈 〈〈 〈〈 〈〈 〉〉 〉〉 〉〉 〉〉 What is a “Multi System”? This system has one outdoor unit connected to multiple indoor units. room Outdoor unit I Selecting the Operation Mode room Living room...
  • Page 161 Instruction Si12-308 I 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 162: Care And Cleaning

    Si12-308 Instruction 2.13 Care and Cleaning FTK(X)E 25/35 B Care and Cleaning Before cleaning, be sure to stop the operation and CAUTION turn the breaker OFF. Units I Indoor unit, Outdoor unit and Remote controller 1. Wipe them with dry soft cloth. I Front grille 1.

  • Page 163: I Air Filter

    Instruction Si12-308 Filters 1. Open the front grille. 2. Pull out the air filters. • Push a little upwards the tab at the center of each air filter, then pull it down. 3. Take off the air purifying filter, photocatalytic deodorizing filter. •...

  • Page 164: Before A Long Idle Period

    Si12-308 Instruction Check Check that the base, stand and other fittings of the outdoor unit are not decayed or corroded. Check that nothing blocks the air inlets and the outlets of the indoor unit and the outdoor unit. Check that the earth wire is not disconnected or broken. Check that the drain comes smoothly out of the drain hose during COOL or DRY operation.

  • Page 165: Front Grille

    Instruction Si12-308 FTK(X)D 50/60/71 B Care and Cleaning Before cleaning, be sure to stop the operation and CAUTION turn the breaker OFF. Units I Indoor unit, Outdoor unit and Remote controller 1. Wipe them with dry soft cloth. I Front grille 1.
  • Page 166 Si12-308 Instruction Filters 1. Open the front grille. 2. Pull out the air filters. • Push a little upwards the tab at the center of each air filter, then pull it down. 3. Take off the air purifying filter with photocatalytic deodorizing function. •...
  • Page 167 Instruction Si12-308 Check Check that the base, stand and other fittings of the outdoor unit are not decayed or corroded. Check that nothing blocks the air inlets and the outlets of the indoor unit and the outdoor unit. Check that the earth wire is not disconnected or broken. Check that the drain comes smoothly out of the drain hose during COOL or DRY operation.
  • Page 168 • When using the unit in a location where dirt may easily accumulate, clean the unit more frequently. Once every 2 weeks is recommended. • Ask your DAIKIN dealer how to clean them. Cleaning the drain pan • Clean the drain pan periodically, or drain piping may be clogged with dust and may result in water leakage.
  • Page 169 Instruction Si12-308 FLK(X) 25/35/50/60 A Care and Cleaning Before cleaning, be sure to stop the operation and CAUTION turn the breaker OFF. Units I Indoor unit, Outdoor unit and Remote controller 1. Wipe them with dry soft cloth. I Front grille 1.
  • Page 170 Si12-308 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 171 Instruction Si12-308 Check Check that the base, stand and other fittings of the outdoor unit are not decayed or corroded. Check that nothing blocks the air inlets and the outlets of the indoor unit and the outdoor unit. Check that the earth wire is not disconnected or broken. Check that the drain comes smoothly out of the drain hose during COOL or DRY operation.

  • Page 172: Trouble Shooting

    Si12-308 Instruction 2.14 Trouble Shooting 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 173: Check Again

    Instruction Si12-308 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 174: Call The Service Shop Immediately

    Si12-308 Instruction Call the service shop immediately. WARNING I I I I When an abnormality (such as a burning smell) occurs, stop operation and turn the breaker OFF. Continued operation in an abnormal condition may result in troubles, electric shocks or fire. Consult the service shop where you bought the air conditioner.
  • Page 175 Instruction Si12-308 System Configuration...

  • Page 176: Part 6 Service Diagnosis

    Si12-308 Part 6 Part 6 Part 6 Part 6 Service Diagnosis Service Diagnosis Service Diagnosis Service Diagnosis 1. Caution for Diagnosis................166 1.1 Troubleshooting with the Operation Lamp ...........166 2. Problem Symptoms and Measures .............168 3. Service Check Function ..............169 4. Code Indication on the Remote Controller ..........170 4.1 Error Codes and Description of Fault ...........170 5.

  • Page 177: Caution For Diagnosis

    Caution for Diagnosis Si12-308 1. Caution for Diagnosis Troubleshooting with the 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 178 Si12-308 Caution for Diagnosis Caution: Operation stops suddenly. (Operation lamp blinks.) Cause of above trouble could be "Operation mode butting". Check followings; Are the operation modes all the same for indoor units connected to Multi system outdoor unit? If not set all indoor units to the same operation mode and confirm that the operation lamp is not blinking.

  • Page 179: Problem Symptoms And Measures

    Problem Symptoms and Measures Si12-308 Problem Symptoms and Measures Problem Symptom Check Item Details of Measure Page to be referred None of The Units Check the power supply. Check to make sure that the rated voltage is — Operates. supplied. Check the type of the indoor units.

  • Page 180: Service Check Function

    Si12-308 Service Check Function Service Check Function In the ARC433A series, the temperature display sections on the main unit indicate corresponding codes. 1. When the timer cancel button is held down for 5 seconds, a “00” indication flashes on the temperature display section.

  • Page 181: Code Indication On The Remote Controller

    Code Indication on the Remote Controller Si12-308 4. Code Indication on the Remote Controller Error Codes and Description of Fault Code Indication Description of Problem System Normal Insufficient gas Low-voltage detection Signal transmission error (between indoor and outdoor units) Unspecified voltage (between indoor and outdoor units) Anti-icing function in other rooms Indoor Indoor unit PCB abnormality...

  • Page 182: Troubleshooting

    Si12-308 Troubleshooting 5. Troubleshooting Indoor Units - : Not used for troubleshooting ∗ : Varies depending on the cases. Indication on Description of The Fault Details of fault the remote (Refer to the controller indicated page.) Indoor unit in normal condition (Conduct a diagnosis of the outdoor —...

  • Page 183: Outdoor Units

    Troubleshooting Si12-308 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 Details of...

  • Page 184: Indoor Unit Pcb Abnormality

    Si12-308 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 185: Freeze-Up Protection Control Or High Pressure Control

    Troubleshooting Si12-308 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 186 Si12-308 Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.6 Check the air passage. Refer to P.210 Is there any Provide sufficient air passage. short-circuit? Check the intake air filter. Is it very dirty? Clean the air filter.

  • Page 187: Fan Motor (Dc Motor) Or Related Abnormality

    Troubleshooting Si12-308 Fan Motor (DC Motor) or Related Abnormality Remote Controller Display Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine Malfunction abnormal fan motor operation. Detection Malfunction When the detected rotation speed is less than 50% of the H tap under maximum fan motor rotation demand.
  • Page 188 Si12-308 Troubleshooting 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.207 and rotate fan by hand. Check No.02 Does fan rotate Replace fan motor.

  • Page 189: Thermistor Or Related Abnormality (Indoor Unit)

    Troubleshooting Si12-308 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 190: Shutter Drive Motor / Shutter Limit Switch Abnormality

    Si12-308 Troubleshooting 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 191: Signal Transmission Error (Between Indoor And Outdoor Units)

    Troubleshooting Si12-308 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 192: Unspecified Voltage (Between Indoor And Outdoor Units)

    Si12-308 Troubleshooting Unspecified Voltage (between Indoor and Outdoor Units) Remote Controller Display Method of The supply power is detected for its requirements (different from separate type and multi type) by the indoor / outdoor transmission signal. Malfunction Detection Malfunction The separate type and multi type are interconnected. Decision Conditions Supposed...

  • Page 193: Freeze-Up Protection Control

    Troubleshooting Si12-308 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 194 Si12-308 Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.4 Check the wiring and piping. Refer to P.208 Check No.6 Wiring or piping out of spec? Activate the wiring error Refer to P.210 check mode.

  • Page 195: Ol Activation (Compressor Overload)

    Troubleshooting Si12-308 5.11 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 196: Compressor Lock

    Si12-308 Troubleshooting 5.12 Compressor Lock Remote Controller Display Outdoor Unit LED Display Method of A compressor lock is detected by checking the compressor running condition through the position detection circuit. Malfunction Detection Malfunction The position detection circuit detects a compressor frequency of below 10 Hz for 20 seconds or a frequency of above 160 Hz.

  • Page 197: Dc Fan Lock

    Troubleshooting Si12-308 5.13 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 198: Input Over Current Detection

    Si12-308 Troubleshooting 5.14 Input Over Current Detection Remote Controller Display Outdoor Unit LED Display Method of An input over-current is detected by checking the input current value being detected by CT with the compressor running. Malfunction Detection Malfunction The following CT input with the compressor running continues for 2.5 seconds. CT input : Above 20 A Decision The system will be shut down if the error occurs 16 times.
  • Page 199 Troubleshooting Si12-308 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.7 ∗ An input over-current may result from wrong internal wiring. If the wires have been disconnected and Refer to P.211 reconnected for part replacement, for example, and the system is interrupted by an input over-current, take the following procedure.

  • Page 200: Four Way Valve Abnormality

    Si12-308 Troubleshooting 5.15 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 201 Troubleshooting Si12-308 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.5 Refer to P.209 Four-way valve coil Correct. disconnected (loose)? Check No.6 Refer to P.210 Harness out of connector? Reconnect.

  • Page 202: Discharge Pipe Temperature Control

    Si12-308 Troubleshooting 5.16 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 If a stop takes place 6 times straight due to abnormal discharge pipe temperature, the system will be shut down.

  • Page 203: Position Sensor Abnormality

    Troubleshooting Si12-308 5.17 Position Sensor Abnormality Remote Controller Display Outdoor Unit LED Display Method of A compressor startup failure is detected by checking the compressor running condition through the position detection circuit. Malfunction Detection Malfunction The compressor fails to start in about 15 seconds after the compressor run command signal is sent.

  • Page 204: Ct Or Related Abnormality

    Si12-308 Troubleshooting 5.18 CT or Related Abnormality Remote Controller Display Outdoor Unit LED Display Method of A CT or related error is detected by checking the compressor running frequency and CT- detected input current. Malfunction Detection Malfunction The compressor running frequency is below 55 Hz and the CT input is below 0.1 V. (The input current is also below 1.25 A.) Decision If this error repeats 4 times, the system will be shut down.
  • Page 205 Troubleshooting Si12-308 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.214 again. Get the system started. ∗...

  • Page 206: Thermistor Or Related Abnormality (Outdoor Unit)

    Si12-308 Troubleshooting 5.19 Thermistor or Related Abnormality (Outdoor Unit) P4, J3, J6, J8, J9, H9 Remote Controller Display Outdoor Unit LED Display Method of This type of error is detected by checking the thermistor input voltage to the microcomputer. [A thermistor error is detected by checking the temperature being detected by each thermistor.] Malfunction Detection Malfunction...
  • Page 207 Troubleshooting Si12-308 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.6 Turn on the power again. Refer to P.210 Error displayed again Reconnect. on remote controller? Connector or thermistor Reconnect.

  • Page 208: Electrical Box Temperature Rise

    Si12-308 Troubleshooting 5.20 Electrical Box Temperature Rise Remote Controller Display Outdoor Unit LED Display Method of An electrical box temperature rise is detected by checking the radiation fin thermistor with the compressor off. Malfunction Detection Malfunction With the compressor off, the radiation fin temperature is above 80°C (above 75°C in the case of 8.0 ·...
  • Page 209 Troubleshooting Si12-308 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.6 WARNING Turn off the power and turn it on Refer to P.210 again. To cool down the electricals, the outdoor unit fan gets started when the radiation fin temperature rises above 78˚C and stops itself when...

  • Page 210: Radiation Fin Temperature Rise

    Si12-308 Troubleshooting 5.21 Radiation Fin Temperature Rise Remote Controller Display Outdoor Unit LED Display Method of A radiation fin temperature rise is detected by checking the radiation fin temperature being detected by the fin thermistor with the compressor on. Malfunction Detection Malfunction If the radiation fin temperature with the compressor on is above 90°C for 5.2~7.5 kW-or-smaller...
  • Page 211 Troubleshooting Si12-308 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.6 Turn off the power and turn it on Refer to P.210 again to get the system started. Check No.7 Refer to P.211 Error displayed again?

  • Page 212: Output Over Current Detection

    Si12-308 Troubleshooting 5.22 Output Over Current Detection Remote Controller Display Outdoor Unit LED Display Method of An output over-current is detected by checking the current that flows in the inverter DC section. Malfunction Detection Malfunction A position signal error occurs while the compressor is running. A speed error occurs while the compressor is running.
  • Page 213 Troubleshooting Si12-308 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.7 ∗ An output over-current may result from wrong internal wiring. If the wires have been disconnected and Refer to P.211 reconnected for part replacement, for example, and the system is interrupted by an output over-current, take the following procedure.

  • Page 214: Insufficient Gas

    Si12-308 Troubleshooting 5.23 Insufficient Gas Remote Controller Display Outdoor Unit LED Display Method of Gas shortage detection I : A gas shortage is detected by checking the CT-detected input current value and the compressor running frequency. Malfunction Gas shortage detection II : A gas shortage is detected by checking the difference between Detection indoor unit heat exchanger temperature and room temperature as well as the difference between outdoor unit heat exchanger temperature and room temperature.
  • Page 215 Troubleshooting Si12-308 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.4 Refer to P.208 Any thermistor Reconnect in position. disconnected? * Discharge pipe thermistor * Indoor / outdoor unit heat exchanger thermistor Check No.6 * Room temperature thermistor Refer to P.210...

  • Page 216: Low-Voltage Detection

    Si12-308 Troubleshooting 5.24 Low-voltage Detection Remote Controller Display Outdoor Unit LED Display Method of An abnormal voltage rise or drop is detected by checking the detection circuit or DC voltage detection circuit. Malfunction Detection Malfunction An over-voltage signal is fed from the over-voltage detection circuit to the microcomputer, or the voltage being detected by the DC voltage detection circuit is judged to be below 150 V Decision for 0.1 second.

  • Page 217: Anti-Icing Function In Other Rooms / Unspecified Voltage (Between Indoor And Outdoor Units)

    Troubleshooting Si12-308 5.25 Anti-icing Function in Other Rooms / Unspecified Voltage (between Indoor and Outdoor Units) UA, UH Remote Controller Display Outdoor Unit LED Display Method of A wrong connection is detected by checking the combination of indoor and outdoor units on the microcomputer.

  • Page 218: Check

    Si12-308 Check 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 219: Electronic Expansion Valve Check

    Check Si12-308 6.1.3 Electronic Expansion Valve Check Check No.4 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 220: Four Way Valve Performance Check

    Si12-308 Check 6.1.4 Four Way Valve Performance Check Check No.5 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 180-220 V with Replace the outdoor unit compressor on? PCB.

  • Page 221: Thermistor Resistance Check

    Check Si12-308 6.1.5 Thermistor Resistance Check Check No.6 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 222: Installation Condition Check

    Si12-308 Check 6.1.6 Installation Condition Check Check No.7 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 223: Discharge Pressure Check

    Check Si12-308 6.1.7 Discharge Pressure Check Check No.8 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 224: Power Supply Waveforms Check

    Si12-308 Check 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 225: Capacitor Voltage Check

    Check Si12-308 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 226: Main Circuit Electrolytic Capacitor Check

    Si12-308 Check 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 227 Check Si12-308 Service Diagnosis...

  • Page 228: Part 7 Removal Procedure

    Si12-308 Part 7 Part 7 Part 7 Part 7 Removal Procedure Removal Procedure Removal Procedure Removal Procedure 1. Outdoor Unit (80 / 90 Class) ...............218 1.1 Removal of Outer Panels ..............218 1.2 Removal of Propeller Fans..............221 1.3 Removal of Electrical Box ..............222 1.4 Removal of PCB...................229 1.5 Removal of Fan Motor................232 1.6 Removal of Electronic Expansion Valve and Thermistor .....234...

  • Page 229: Outdoor Unit (80 / 90 Class)

    Outdoor Unit (80 / 90 Class) Si12-308 1. Outdoor Unit (80 / 90 Class) Removal of Outer Panels Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points External appearance.
  • Page 230 Si12-308 Outdoor Unit (80 / 90 Class) Step Procedure Points Unscrew 3 screws of the right panel, slide it downwards and release the tabs to remove. The figure shows the view of piping connections. Unscrew 1 screw of the front right panel, slide it downwards and release the tabs to remove.
  • Page 231 Outdoor Unit (80 / 90 Class) Si12-308 Step Procedure Points Unscrew 3 screws of the front panel to remove. Remove 4 screws of the discharge outlet grill. Slide the discharge outlet grill upwards and release 6 tabs to remove. Removal Procedure...

  • Page 232: Removal Of Propeller Fans

    Si12-308 Outdoor Unit (80 / 90 Class) Removal of Propeller Fans Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the discharge outlet grill To take off propeller fan, remove the washer-fitted nut M8.

  • Page 233: Removal Of Electrical Box

    Outdoor Unit (80 / 90 Class) Si12-308 Removal of Electrical Box Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the outer panels Match the colors of the tie such as top and front wires to A, B, C and D ports panels.
  • Page 234 Si12-308 Outdoor Unit (80 / 90 Class) Step Procedure Points Remove the earth wire. Remove 1 screw of the terminal board. Release the tab on the top right of the terminal board. Pull out the terminal Glass tube fuse and varistor board and open it.
  • Page 235 Outdoor Unit (80 / 90 Class) Si12-308 Step Procedure Points 2. Remove each wire harness Disconnect 4 connectors of the electronic expansion Connector Electronic Harness expansion length valve lead wires. valve No. (White) (Red) (Blue) (Yellow) When reconnecting, make sure to match the wire to the correct connector.
  • Page 236 Si12-308 Outdoor Unit (80 / 90 Class) Step Procedure Points Remove the connector for gas pipe thermistor. Remove the connector S90 for thermistor. Outdoor air thermistor (Blue) Discharge pipe thermistor (Black) Heat exchanger thermistor (Gray) Remove the overload relay connector S40. Remove the reactor lead wire.
  • Page 237 Outdoor Unit (80 / 90 Class) Si12-308 Step Procedure Points Remove the relay connector for compressor. Remove the electrical box cover. Disconnect the fan motor connector. Remove the discharge pipe thermistor. Removal Procedure...
  • Page 238 Si12-308 Outdoor Unit (80 / 90 Class) Step Procedure Points Take off the thermistor Place the thermistor so that presser spring, and its end comes up to the end remove the thermistor. of the presser spring. Be careful not to lose the presser spring for the discharge pipe thermistor.
  • Page 239 Outdoor Unit (80 / 90 Class) Si12-308 Step Procedure Points Remove the outdoor air thermistor lead wire from the groove. Remove each wire harness, and dismount the electrical box by lifting it. Removal Procedure...

  • Page 240: Removal Of Pcb

    Si12-308 Outdoor Unit (80 / 90 Class) Removal of Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Removing the controller Release the tab of the electrical box, and open the terminal board.
  • Page 241 Outdoor Unit (80 / 90 Class) Si12-308 Step Procedure Points Lift the PCB at the terminal board side. Disconnect each wire harness connector linked to the inverter PCB. Removal Procedure...
  • Page 242 Si12-308 Outdoor Unit (80 / 90 Class) Step Procedure Points The figure shows the S20: Electronic expansion valve controller PCB. coil A port S21: Electronic expansion valve coil B port S22: Electronic expansion valve coil C port S23: Electronic expansion valve coil D port S31: To CN14 (Pin 9) S32: To CN11 (Pin 5)

  • Page 243: Removal Of Fan Motor

    Outdoor Unit (80 / 90 Class) Si12-308 Removal of Fan Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the outer panels. Remove the fan motor lead wire connector S70.
  • Page 244 Si12-308 Outdoor Unit (80 / 90 Class) Step Procedure Points Remove 4 screws of the fan motor. Cut the wrapper fixing the lead wire. When reassembling, fix the lead wire to avoid contact with the propeller fan. Remove the fan motor. Removal Procedure...

  • Page 245: Removal Of Electronic Expansion Valve And Thermistor

    Outdoor Unit (80 / 90 Class) Si12-308 Removal of Electronic Expansion Valve Thermistor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove each wire Place the thermistor so that harness.

  • Page 246: Removal Of Sound Insulation And Reactor

    Si12-308 Outdoor Unit (80 / 90 Class) Removal of Sound Insulation Reactor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Release the clip fixing the compressor lead wire.
  • Page 247 Outdoor Unit (80 / 90 Class) Si12-308 Step Procedure Points Remove the noise Carefully remove the noise insulation (top). insulation, which is easily torn in the piping section. Remove the noise insulation (inner). Remove 1 screw of the reactor. Removal Procedure...

  • Page 248: Removal Of Shunt

    Si12-308 Outdoor Unit (80 / 90 Class) Removal of Shunt Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove 6 screws of Fasten the rubber packing the tie wire presser with double-faced adhesive plate.

  • Page 249: Removal Of Solenoid Valve And Four Way Valve

    Outdoor Unit (80 / 90 Class) Si12-308 Removal of Solenoid Valve Four Way Valve Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the outer panels. 1.
  • Page 250 Si12-308 Outdoor Unit (80 / 90 Class) Step Procedure Points Before taking this Reassembling precautions procedure, make sure 1. Use non-oxidizing brazing there is no refrigerant gas method. If nitrogen gas is not left in the refrigerant available, braze the parts pipes.

  • Page 251: Removal Of Compressor

    Outdoor Unit (80 / 90 Class) Si12-308 1.10 Removal of Compressor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the terminal cover. Remove the overload relay.
  • Page 252 Si12-308 Outdoor Unit (80 / 90 Class) Step Procedure Points Make sure there is no refrigerant gas left inside Warning the refrigerant pipes The compressor's refrigerating before starting the job. machine oil may catch fire. Have When heating up the wet cloth at hand for quickly putting brazed parts, make sure out the fire.

  • Page 253: Outdoor Unit (52 / 58 / 68 / 75 Class)

    Outdoor Unit (52 / 58 / 68 / 75 Class) Si12-308 2. Outdoor Unit (52 / 58 / 68 / 75 Class) Removal of Outer Panels Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.

  • Page 254: Removal Of Electrical Box

    Si12-308 Outdoor Unit (52 / 58 / 68 / 75 Class) Removal of Electrical BOX Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Removing the tie wires The figure shows the tie pipe connections.
  • Page 255 Outdoor Unit (52 / 58 / 68 / 75 Class) Si12-308 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 256 Si12-308 Outdoor Unit (52 / 58 / 68 / 75 Class) 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 257 Outdoor Unit (52 / 58 / 68 / 75 Class) Si12-308 Step Procedure Points Remove 1 screw of the electrical box. Remove the drip-proof cover. Disconnect the fan motor lead wire. Lift up the electrical box and dismount it. Removal Procedure...

  • Page 258: Removal Of Pcb

    Si12-308 Outdoor Unit (52 / 58 / 68 / 75 Class) Removal of Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Removing the controller Remove 1 screw of the PCB, and release two tabs.
  • Page 259 Outdoor Unit (52 / 58 / 68 / 75 Class) Si12-308 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 260 Si12-308 Outdoor Unit (52 / 58 / 68 / 75 Class) Step Procedure Points The figure shows the Glass tube fuse 3A control PCB. 2. Removing the service monitor PCB The figure shows the service monitor PCB. 3. Removing the inverter PCB.

  • Page 261: Removal Of Fan Motor

    Outdoor Unit (52 / 58 / 68 / 75 Class) Si12-308 Removal of Fan Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the fan motor For reassembling, align lead wire connector.

  • Page 262: Removal Of Sound Insulation

    Si12-308 Outdoor Unit (52 / 58 / 68 / 75 Class) Removal of Sound Insulation 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 263: Removal Of Four Way Valve Coil, Solenoid Valve Coil

    Outdoor Unit (52 / 58 / 68 / 75 Class) Si12-308 Removal of Four Way Valve Coil, Solenoid Valve Coil, Electronic Expansion Valve Coil Thermistor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
  • Page 264 Si12-308 Outdoor Unit (52 / 58 / 68 / 75 Class) Step Procedure Points Take off the putty, and Place the thermistor so that remove each its end comes up to the end thermistor. of the presser spring. Be careful not to lose the presser spring for the discharge pipe thermistor.

  • Page 265: Removal Of Four Way Valve, Solenoid Valve And Shunt

    Outdoor Unit (52 / 58 / 68 / 75 Class) Si12-308 Removal of Four Way Valve, Solenoid Valve Shunt Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove 1 screw of the Reassembling precautions...

  • Page 266: Removal Of Solenoid Valve And Shunt

    Si12-308 Outdoor Unit (52 / 58 / 68 / 75 Class) Removal of Solenoid Valve Shunt Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Before taking this procedure, make sure there is no refrigerant gas Caution...

  • Page 267: Removal Of Compressor

    Outdoor Unit (52 / 58 / 68 / 75 Class) Si12-308 Removal of Compressor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the terminal cover. Disconnect the As precaution, keep the contents in memorandum.

  • Page 268: Part 8 Others

    Si12-308 Part 8 Part 8 Part 8 Part 8 Others Others Others Others 1. Others ....................258 1.1 Test Run from the Remote Controller ..........258 1.2 Jumper Settings ...................259 Others...

  • Page 269: Others

    Others Si12-308 1. Others Test Run from the Remote Controller Trial Operation and Testing 1. Measure the supply voltage and make sure that it falls in the specified range. 2. Trial operation should be carried out in either cooling or heating mode. For Heat pump In cooling mode, select the lowest programmable temperature;...

  • Page 270: Jumper Settings

    Si12-308 Others Jumper Settings 1.2.1 When Two Units are Installed in One Room How to set the different addresses. When two indoor units are installed in one room, the two wireless remote controllers can be set for different addresses. PCB in the indoor unit Remove the front panel.
  • Page 271 Others Si12-308 1.2.3 Adjusting the Angle of the Intelligent Eye Sensor Wall Mounted Type 25 / 35 Class Only Once installation of the indoor unit is complete, adjust the angle of the Intelligent eye sensor to ensure the detection area properly covers the room. (Adjustable angle : 15°...

  • Page 272: Part 9 Appendix

    Si12-308 Part 9 Part 9 Part 9 Part 9 Appendix Appendix Appendix Appendix 1. Piping Diagrams..................262 1.1 Indoor Units ..................262 1.2 Outdoor Units ..................268 2. Wiring Diagrams..................275 2.1 Indoor Units ..................275 2.2 Outdoor Units ..................280 Appendix...

  • Page 273: Piping Diagrams

    Piping Diagrams Si12-308 1. Piping Diagrams Indoor Units 1.1.1 Wall Mounted Type FTKE25 / 35BVM, FTK(X)E25 / 35BVMA, FTK(X)E25 / 35BVMT, FTXE25 / 35BVMC INDOOR UNIT HEAT EXCHANGER 7.0CuT 6.4CuT THERMISTOR 6.4CuT ON HEAT EXCH. 6.4CuT CROSS FLOW FAN FIELD PIPING ( 6.4CuT ) FAN MOTOR FTXE25--...
  • Page 274 Si12-308 Piping Diagrams FTKD50BVM, FTK(X)D50BVMA, FTK(X)D50BVMT, FTXD50BVMC, FTK(X)S50 / 60BVMB INDOOR UNIT ( 7.9CuT ) HEAT EXCHANGER THERMISTOR ON HEAT EXCH. CROSS FLOW FAN FIELD PIPING ( 6.4CuT ) FAN MOTOR FIELD PIPING ( 12.7CuT ) ( 12.7CuT ) REFRIGERANT FLOW COOLING 4D040081A HEATING...
  • Page 275 Piping Diagrams Si12-308 FTKD71BVM, FTK(X)D71BVMA, FTK(X)D71BVMT, FTXD71BVMC INDOOR UNIT ( 7.9CuT ) HEAT EXCHANGER THERMISTOR ON HEAT EXCH. CROSS FLOW FAN FIELD PIPING ( 9.5CuT ) REFRIGERANT FLOW FAN MOTOR COOLING FIELD PIPING ( 15.9CuT ) HEATING ( 12.7CuT ) 4D040083A 1.1.2 Duct Connected Type CDK25 / 35 / 50 / 60AVM, CDK(X)25 / 35 / 50 / 60AVMA,...
  • Page 276 Si12-308 Piping Diagrams CDK(X)S25 / 35 / 50 / 60BVMB INDOOR UNIT ( 6.4CuT ) HEAT EXCHANGER THERMISTOR ON HEAT EXCH. FIELD PIPING CDXS25BVMB ( 6.4CuT ) SIROCCO FAN CDKS25BVMB CDXS35BVMB CDKS35BVMB FAN MOTOR CDXS50BVMB CDKS50BVMB FIELD PIPING CuT ) 12.7 12.7 CDXS60BVMB...
  • Page 277 Piping Diagrams Si12-308 FVK(X)S50BVMB INDOOR UNIT HEAT EXCHANGER 7.0CuT MUFFLER 4.8CuT 4.8CuT FAN MOTOR CROSS FLOW FAN THERMISTOR ON HEAT EXCH. MUFFLER 7.0CuT 7.0CuT CROSS FLOW FAN FAN MOTOR FIELD PIPING 7.0CuT ( 6.4CuT ) FIELD PIPING 9.5CuT ( 12.7CuT ) REFRIGERANT FLOW COOLING HEATING...
  • Page 278 Si12-308 Piping Diagrams FLK(X)25 / 35 / 50 / 60AVMA INDOOR UNIT CuT ) HEAT EXCHANGER THERMISTOR ON HEAT FIELD PIPING EXCH. ( 6.4CuT ) SIROCCO FAN FLX25- FLK25- FLX35- 12.7 FAN MOTOR FLK35- FLX50- 12.7 12.7 FIELD PIPING CuT ) FLK50- CuT ) FLX60-...

  • Page 279: Outdoor Units

    Piping Diagrams Si12-308 Outdoor Units 2MKD58BVM OUTDOOR UNIT HEAT EXCHANGER OUTDOOR TEMPERATURE THERMISTOR ( DOA ) HEADER MOTOR OPERATED VALVE 9.5CuT 6.4CuT ROOM A ( 6.4 CuT ) FILTER FIELD FILTER PIPING HEAT EXCHANGER MOTOR OPERATED VALVE LIQUID THERMISTOR ( DE ) DISTRIBUTOR 6.4CuT ROOM B...
  • Page 280 Si12-308 Piping Diagrams 3MKD75BVM, 3MKD75BVMA, 3MKD75BVMT OUTDOOR UNIT HEAT EXCHANGER OUTDOOR TEMPARETURE THERMISTOR ( DOA ) MOTOR OPERATED VALVE HEADER 6.4CuT 9.5CuT ROOM A ( 6.4 CuT ) FILTER MOTOR OPERATED VALVE 6.4CuT FIELD ROOM B PIPING FILTER ( 9.5 CuT ) FILTER HEAT EXCHANGER LIQUID...
  • Page 281 Piping Diagrams Si12-308 3MXD68BVMC, 3MXD68BVMA, 3MXD68BVMT OUTDOOR UNIT HEAT EXCHANGER OUTDOOR TEMPERATURE THERMISTOR ( DOA ) MOTOR OPERATED VALVE LIQUID PIPE HEADER THERMISTOR ( DLA ) 6.4CuT HEADER 9.5CuT ROOM A ( 6.4 CuT ) FILTER MOTOR OPERATED VALVE LIQUID PIPE THERMISTOR ( DLB ) 6.4CuT FIELD...
  • Page 282 Si12-308 Piping Diagrams 3MKS50BVMB 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 283 Piping Diagrams Si12-308 4MKS75BVMB OUTDOOR UNIT HEAT EXCHANGER OUTDOOR TEMPARATURE THERMISTOR ( DOA ) MOTOR OPERATED VALVE LIQUID PIPE THERMISTOR ( DLA ) 6.4CuT HEADER 9.5CuT ROOM A ( 6.4 CuT ) FILTER MOTOR OPERATED VALVE LIQUID PIPE THERMISTOR ( DLB ) 6.4CuT ROOM B ( 6.4 CuT )
  • Page 284 Si12-308 Piping Diagrams 3MXS52BVMB OUTDOOR UNIT HEAT EXCHANGER OUTDOOR TEMPARATURE THERMISTOR ( DOA ) HEADER HEADER MOTOR OPERATED VALVE LIQUID PIPE 9.5CuT THERMISTOR ( DLA ) 6.4CuT ROOM A ( 6.4 CuT ) FILTER MOTOR OPERATED VALVE LIQUID PIPE THERMISTOR ( DLB ) 6.4CuT FIELD ROOM B...
  • Page 285 Piping Diagrams Si12-308 4MKD90BVM, 4MKD90BVMA, 4MKD90BVMT OUTDOOR UNIT MOTOR OPERATED VALVE HEAT EXCHANGER OUTDOOR TEMPERATURE THERMISTOR ( DOA ) 7.9CuT HEADER ROOM A 7.9CuT ( 6.4 CuT ) FILTER MOTOR OPERATED VALVE 7.9CuT 7.9CuT 7.9CuT ROOM B 7.9CuT ( 6.4 CuT ) 7.9CuT FILTER FIELD...

  • Page 286: Wiring Diagrams

    Si12-308 Wiring Diagrams 2. Wiring Diagrams Indoor Units 2.1.1 Wall Mounted Type FTKE25 / 35BVM, FTK(X)E25 / 35BVMA, FTK(X)E25 / 35BVMT, FTK(X)S25 / 35BVMB PCB3 PCB1 → INTELLIGENT- 3.15A EYE SENSOR outdoor TERMINAL FOR PCB2 FIELD WIRING. / YLW CENTRALIZED CONTROL TRANSMISSION LED2 LED3...
  • Page 287 Wiring Diagrams Si12-308 FTKD50 / 60 / 71BVM, FTK(X)D50 / 60 / 71BVMA, FTK(X)D50 / 60 / 71BVMT, FTK(X)S60 / 71BVMB FIELD WIRING. PCB3 PCB1 RECTIFIER 3.15A OUTDOOR t˚ CAUTION TRANSMISSION NOTE THAT OPERATION WILL CIRCUIT RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS PCB4 TURNED OFF AND THEN BACK ON AGAIN.
  • Page 288 Si12-308 Wiring Diagrams FTXD50BVMC FTXD60 / 71BVMC Appendix...
  • Page 289 Wiring Diagrams Si12-308 2.1.2 Duct Connected Type CDK25 / 35 / 50 / 60AVM, CDK(X) 25 / 35 / 50 / 60AVMA, CDK(X)S25 / 35 / 50 / 60BVMB PCB1 PCB2 → 3.15A outdoor TERMINAL FOR / YLW FIELD WIRING. CENTRALIZED CONTROL TRANSMISSION CIRCUIT...
  • Page 290 Si12-308 Wiring Diagrams 2.1.3 Floor / Ceiling Suspended Dual Type FLK(X)25 / 35 / 50 / 60AVMA, FLK(X)S25 / 35 / 50 / 60BVMB PCB3 PCB1 PCB2 3.15A → outdoor FIELD WIRING. / YLW PCB4 TRANSMISSION CIRCUIT CAUTION NOTE THAT OPERATION WILL SIGNAL RESTART AUTOMATICALLY IF RECEIVER...

  • Page 291: Outdoor Units

    Wiring Diagrams Si12-308 Outdoor Units 2MKD58BVM POWER SUPPLY FU201 ~ 50Hz 220-240V MID2 ~ 60Hz 220-230V 3.15A FIELD WIRING MRM20 MRM10 X11A TO INDOOR UNIT CN11 ROOM A R12T MID1 CN14 3.15A t˚ ROOM B 1 S40 S101 t˚ t˚ t˚...
  • Page 292 Si12-308 Wiring Diagrams 3MKD58 / 75BVM, 3MKD75BVMA, 3MKD75BVMT POWER SUPPLY FU201 ~ 50Hz 220-240V MID2 ~ 60Hz 220-230V 3.15A FIELD WIRING MRM20 MRM10 X11A TO INDOOR UNIT CN11 ROOM A MID1 R12T CN14 3.15A t˚ ROOM B ROOM C S101 t˚...
  • Page 293 Wiring Diagrams Si12-308 4MKS58BVMB, 4MKS75BVMB, 4MKS90BVMB POWER SUPPLY FU201 MID2 ~ 50Hz 220-240V ~ 60Hz 220-230V 3.15A FIELD WIRING MRM20 MRM10 X11A TO INDOOR UNIT CN11 ROOM A MID1 R12T CN14 3.15A t˚ ROOM B ROOM C S101 ROOM D t˚...
  • Page 294 Si12-308 Wiring Diagrams 4MXD80BVMA, 4MXD80BVMT, 4MXS68 / 80BVMB POWER SUPPLY FU201 MID2 ~ 50Hz 220-240V 3.15A ~ 60Hz 220-230V FIELD WIRING MRM20 MRM10 X11A TO INDOOR UNIT CN11 ROOM A R12T MID1 CN14 3.15A t˚ ROOM B ROOM C S101 ROOM D t˚...
  • Page 295 Wiring Diagrams Si12-308 4MXD80BVMC POWER SUPPLY FU201 ~ 50Hz 220-240V MID2 ~ 60Hz 220-230V 3.15A FIELD WIRING MRM20 MRM10 X11A TO INDOOR UNIT ROOM A CN11 MID1 R12T CN14 3.15A t˚ ROOM B ROOM C S101 ROOM D t˚ t˚ t˚...

  • Page 296: Index

    Si12-308 Index Index Index Index Numerics E6 ................. 185 E7 ................. 186 3 minutes stand-by..........95 E8 ................. 187 3-D airflow ...............76 EA ................ 189 electrical box ..........222, 243 electrical box temperature rise ......197 A1................173 electronic expansion valve ........234 A5..............174, 182 electronic expansion valve check......
  • Page 297 Si12-308 indoor unit PCB abnormality .........173 outer panels ..........218, 242 input current control ..........96 output over current detection ....... 201 input over current detection........187 over current ............105 installation condition check ........211 overload ............... 105 insufficient gas ............203 overload relay............244 insufficient gas control...........105 intelligent eye ..........81, 143 intelligent eye sensor ..........260...
  • Page 298 Si12-308 S70................232 S71............72, 231, 248 wide-angle louvers ..........76 S8..............65, 67, 70 wiring diagrams ............ 275 S80..........72, 224, 231, 244 wiring-error check..........107 S90..........72, 225, 231, 244, 253 S92..........72, 225, 231, 244, 253 S93..........72, 224, 231, 244, 253 SC control .............103 self-diagnosis digital display........86 sensor malfunction detection ........105 service check function...........169...
  • Page 299 Si12-308 Index...
  • Page 300 Si12-308 Drawings & Flow Charts Drawings & Flow Charts Drawings & Flow Charts Drawings & Flow Charts insufficient gas ............. 203 insufficient gas control.......... 105 anti-icing function in other rooms ......206 intelligent eye ............81 automatic air flow control ........77 intelligent eye sensor PCB ........
  • Page 301 Si12-308 thermistor or related abnormality (outdoor unit)..........195 thermistor resistance check ........210 troubleshooting with the LED indication ....167 turning speed pulse input on the outdoor unit PCB check ......215 unspecified voltage (between indoor and outdoor units) ..181, 206 wiring diagrams .............275 wiring-error check..........107 Drawings &...
  • Page 302 Head office: Zandvoordestraat 300, B-8400 Oostende, Belgium Umeda Center Bldg., 4-12, Nakazaki-Nishi 2-chome, Kita-ku, Osaka, 530-8323 Japan Tokyo office: Shinjuku Sumitomo Bldg., 6-1 Nishi-Shinjuku 2-chome, Shinjuku-ku, Tokyo, 163-0235 Japan For further improvement, specifications or designs are subject to change without prior notice. Printed in Singapore 07/2003 AK COS...

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