Daikin FTX25JVEA9 Service Manual
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Daikin FTX25JVEA9 Service Manual

Super multi plus j series
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Table of Contents

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Si18-201
Service
Manual
J Series
[Applied Models]
! ! ! ! Super Multi Plus : Cooling Only
! ! ! ! Super Multi Plus : Heat Pump

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Summary of Contents for Daikin FTX25JVEA9

  • Page 1 Si18-201 Service Manual J Series [Applied Models] ! ! ! ! Super Multi Plus : Cooling Only ! ! ! ! Super Multi Plus : Heat Pump...
  • Page 2 Si18-201 Super Multi Plus Super Multi Plus Super Multi Plus Super Multi Plus J Series J Series J Series J Series ! Heat Pump Indoor Unit FTX25JVEA9 FTXD50JVEA9 CDX25HAVEA FLX25HVEA FHYC35KVE9 FTX35JVEA9 FTXD60JVEA CDX35HAVEA FLX35HVEA FHYC50KVE9 FTX25JVEC FTXD71JVEA CDX50HAVEA FLX50JVEA9...
  • Page 3 Si18-201 NOTICE : Special specifications Model RMK140JAVM has the following different specifications from the others. Take the important notes below. This model is designed for cooling mode only, which means it has no heating functions at all. Important points : The model is not equipped with the receiver circuit. 1) The heating mode is not available because the following parts are not built in.

  • Page 4: Table Of Contents

    Si18-201 1. Introduction .................... ix 1.1 Safety Cautions ..................ix Part 1 List of Function ..............1 1. List of Function..................2 1.1 Function List for General ................2 1.2 Function List for China ................3 1.3 Function List for Taiwan ................4 1.4 Function List for Europe ................5 1.5 Function List for Singapore, Malaysia, Indonesia........6 1.6 Function List for Australia.................7 1.7 Function List for Europe ................8...
  • Page 5 Si18-201 Part 5 Main Functions Outdoor Unit / BP Unit......101 1. Refrigerant System and Function of Functional Parts of Outdoor Unit..................103 1.1 Refrigerant System and Function of Functional Parts of Outdoor Unit ..................103 1.2 Major Functional Parts .................104 1.3 Protective Devices, Thermistors, Sensors ...........106 2.
  • Page 6 Si18-201 3.38 JIS Mode ....................167 3.39 Pump Down Operation .................168 3.40 Protection Control of SkyAir Indoor Units..........169 Part 6 Flow of Refrigerant ............171 1. Flow of Refrigerant................172 1.1 Flow of Refrigerant ................172 1.2 Standby Operation (Cooling)..............173 1.3 Equalizing Control (Cooling)..............174 1.4 Oil Return Operation (Cooling).............175 1.5 Low Outside Air Temperature Cooling ..........176 1.6 All-Room Operation (Cooling) ..............177...
  • Page 7 Si18-201 1.3 Code Indication on the Remote Controller ...........230 1.4 Troubleshooting..................231 1.5 Troubleshooting Detail .................232 2. Troubleshooting - SkyAir Indoor Unit ..........246 2.1 The INSPECTION/TEST Button............246 2.2 Self-Diagnosis by Wired Remote Controller.........247 2.3 Fault Diagnosis by Wireless Remote Controller........248 2.4 Troubleshooting by LED on the Indoor Unit’s........250 2.5 Troubleshooting by Remote Controller Display / LED Display .....251 2.6 Troubleshooting Detail .................252 3.
  • Page 8 Si18-201 Part 12 Appendix................. 359 1. Piping Diagrams..................360 1.1 Outdoor Units ..................360 1.2 BP Units ....................362 1.3 Indoor Units ..................363 2. Wiring Diagrams..................370 2.1 Outdoor Units ..................370 2.2 BP Units ....................374 2.3 Indoor Units ..................375 Index ..................... i Drawings & Flow Charts ..............v Table of Contents...
  • Page 9 Si18-201 viii Table of Contents...

  • Page 10: Introduction

    Si18-201 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 11 Introduction Si18-201 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 12 Si18-201 Introduction Warning Be sure to use the specified cable to connect between the indoor and outdoor units. Make the connections securely and route the cable properly so that there is no force pulling the cable at the connection terminals. Improper connections can cause excessive heat generation or fire.
  • Page 13 Introduction Si18-201 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. Improper installation and connections can cause excessive heat generation, fire or an electrical shock. If the installation platform or frame has corroded, replace it.

  • Page 14: Part 1 List Of Function

    Si18-201 Part 1 Part 1 Part 1 Part 1 List of Function List of Function List of Function List of Function 1. List of Function..................2 1.1 Function List for General ................2 1.2 Function List for China ................3 1.3 Function List for Taiwan ................4 1.4 Function List for Europe ................5 1.5 Function List for Singapore, Malaysia, Indonesia........6 1.6 Function List for Australia.................7...

  • Page 15: List Of Function

    List of Function Si18-201 1. List of Function Function List for General Indoor Unit / Division Outdoor Unit ! ! ! ! – – – – – – – – ! – – – – ! – – – – – – – – – – ! ! – ! – – Outdoor Unit –...

  • Page 16: Function List For China

    Si18-201 List of Function Function List for China Indoor Unit / Division Outdoor Unit – – – – – – – – ! ! – ! – – 115 m – – – ! ! ! ! – – – – – – – ! – – – – ! – Outdoor Unit –...

  • Page 17: Function List For Taiwan

    List of Function Si18-201 Function List for Taiwan Indoor Unit / Division Outdoor Unit – – – – – – – – ! ! – ! – – 115 m – – – ! ! ! ! – – – – – – – – ! – – – – ! – – Outdoor Unit –...

  • Page 18: Function List For Europe

    Si18-201 List of Function Function List for Europe Indoor Unit / Division Outdoor Unit – – – – – – – – ! ! – ! – – 115 ! ! ! ! – – – – – – – – ! – – – – – – – Outdoor Unit –...

  • Page 19: Function List For Singapore, Malaysia, Indonesia

    List of Function Si18-201 Function List for Singapore, Malaysia, Indonesia Indoor Unit / Division Outdoor Unit ! ! ! ! – – – – – – – – ! – – – – ! – – – – – – – – – – ! ! – ! – – – – – – Outdoor Unit –...

  • Page 20: Function List For Australia

    Si18-201 List of Function Function List for Australia Indoor Unit / Division Outdoor Unit – – – – – – – – ! ! – ! – – 115 m – – – ! ! ! ! – – – – – – – – ! – – – – ! – – Outdoor Unit –...

  • Page 21: Function List For Europe

    List of Function Si18-201 Function List for Europe Indoor Unit / Division Outdoor Unit ! ! ! ! – – – – – – – – ! – – – – – – – – – – – – – – – ! ! – ! – – Outdoor Unit –...

  • Page 22: Part 2 Specifications

    Si18-201 Part 2 Part 2 Part 2 Part 2 Specifications Specifications Specifications Specifications 1. Specifications ..................10 1.1 Outdoor Units ..................10 1.2 BP Units ....................18 1.3 Indoor Units (for General)...............19 1.4 Indoor Units (for China) ................34 1.5 Indoor Units (for Taiwan)................43 1.6 Indoor Units (for Europe)................52 The RMK140JAVM specifications are special.

  • Page 23: Specifications

    Specifications Si18-201 1. Specifications Outdoor Units 1.1.1 Cooling Only 50Hz 220-240V / 60Hz 220-230V Model RMK140JVMC9 (8) 14.5 Cooling Capacity (19.0°CWB) kcal/h 12,470 Power Consumption 5,000 Running Current 23.2 Casing Color Ivory White Type Hermetically Sealed Scroll Type (Oval Discharge) Compressor Model JT100FBVD...

  • Page 24: Outdoor Unit

    Si18-201 Specifications 60Hz 220V Model RMK140JVMT9 14.5 Cooling Capacity (19.5°CWB) kcal/h 12,500 Power Consumption 4,950 Running Current 23.0 Casing Color Ivory White Type Hermetically Sealed Scroll Type (Oval Discharge) Compressor Model JT100FBVD Motor Output 3,300 Model SUNISO 4GSD.I. Refrigerant Charge Type Refrigerant Charge...
  • Page 25 Specifications Si18-201 50Hz 220-230-240V / 60Hz 220-230V Model RMK140JAVM 14.5 Cooling Capacity (19.0°CWB) kcal/h 12,470 Power Consumption 4,650 Running Current 20.4 Casing Color Ivory White Type Hermetically Sealed Scroll Type (Oval Discharge) Compressor Model JT100FBVD Motor Output 3,300 Model SUNISO 4GSD.I. Refrigerant Charge Type...
  • Page 26 Si18-201 Specifications 50Hz 220-230-240V / 60Hz 220-230V Model RMK140JZVMA 14.5 Cooling Capacity (19.0°CWB) kcal/h 12,470 Power Consumption 5,000 Running Current 23.2-22.2-21.3 Casing Color Ivory White Type Hermetically Sealed Scroll Type (Oval Discharge) Compressor Model JT100FAVD Motor Output 3,300 Model DAPHNE FVC68D Refrigerant Charge Type...

  • Page 27: Heat Pump

    Specifications Si18-201 1.1.2 Heat Pump 50Hz 220-240V / 60Hz 220-230V RMX140JVMC9 (8) Model Cooling Heating 14.5 16.5 Cooling Capacity (19.0°CWB) kcal/h 12,470 14,190 Power Consumption 5,000 5,780 Running Current 23.2 26.8 Casing Color Ivory White Type Hermetically Sealed Scroll Type (Oval Discharge) Compressor Model JT100FBVD...
  • Page 28 Si18-201 Specifications 60Hz 220-230V RMX140JVMT9 Model Cooling Heating 14.5 16.5 Cooling Capacity (19.5°CWB) kcal/h 12,500 14,200 Power Consumption 4,950 5,870 Running Current 23.0 27.2 Casing Color Ivory White Type Hermetically Sealed Scroll Type (Oval Discharge) Compressor Model JT100FBVD Motor Output 3,300 Model SUNISO 4GSD.I.
  • Page 29 Specifications Si18-201 50Hz 220-240V / 60Hz 220-230V RMX140JVMB Model Cooling Heating 14.5 16.5 Cooling Capacity (19.0°CWB) kcal/h 12,470 14,190 Power Consumption 5,000 5,780 Running Current 23.2 26.8 Casing Color Ivory White Type Hermetically Sealed Scroll Type (Oval Discharge) Compressor Model JT100FBVD Motor Output 3,300...
  • Page 30 Si18-201 Specifications 50Hz 220-230-240V / 60Hz 220-230V RMX140JZVMB Model Cooling Heating 14.5 16.5 Cooling Capacity (19.0°CWB) kcal/h 12,470 14,190 Power Consumption 5,000 6,050 Running Current 23.2-22.2-21.3 28.1-26.8-25.7 Casing Color Ivory White Type Hermetically Sealed Scroll Type (Oval Discharge) Compressor Model JT100FAVD Motor Output 3,300...

  • Page 31: Bp Units

    Specifications Si18-201 BP Units 50Hz 220-240V / 60Hz 220-230V Model BPMK928B42 BPMK928B43 Connectable Indoor Units 1~2 Units 1~3 Units Cooling — — Capacity Heating — — Casing Color Paintingless Power Consumption Running Current 0.05 0.05 Type — Refrigerant Charge — Dimensions (H×W×D) 223×400×272...

  • Page 32: Indoor Units (For General)

    Si18-201 Specifications Indoor Units (for General) 1.3.1 Cooling Only " Wall Mounted Type " 2.5kW Class 50Hz 220-230-240V / 60Hz 220-230V FTK25JVE9 FTK25JVEA9 Model Rating Capacity Front Panel Color Almond White m³/min Air Flow Rates Type Cross Flow Fan Motor Output Speed Steps 5 Steps and Auto...
  • Page 33 Specifications Si18-201 " 5.0kW Class 50Hz 220-230-240V / 60Hz 220-230V Model FTKD50JVE FTKD50JVEA9 Rating Capacity Front Panel Color Almond White 12.9 m³/min 11.4 Air Flow Rates Type Cross Flow Fan Motor Output Speed Steps 5 Steps and Auto Air Filter Removal / Washable / Mildew Proof Running Current (Rated)
  • Page 34 Si18-201 Specifications " 7.1kW Class 50Hz 220-230-240V / 60Hz 220-230V Model FTKD71JVE FTKD71JVEA Rating Capacity Front Panel Color Almond White 14.3 m³/min 12.3 10.4 Air Flow Rates Type Cross Flow Fan Motor Output Speed Steps 5 Steps and Auto Air Filter Removal / Washable / Mildew Proof Running Current (Rated)

  • Page 35: Duct Connected Type

    Specifications Si18-201 " Duct Connected Type " 2.5kW Class 50Hz 220-230-240V / 60Hz 220-230V Model CDK25HAVE CDK25HAVEA Rating Capacity Front Panel Color — 13.0 m³/min 12.0 11.0 Air Flow Rates Type Sirocco Fan Motor Output Speed Steps 5 Steps and Auto Air Filter —...
  • Page 36 Si18-201 Specifications " 5.0kW Class 50Hz 220-230-240V / 60Hz 220-230V Model CDK50HAVE CDK50HAVEA Rating Capacity Front Panel Color — 13.0 m³/min 12.0 11.0 Air Flow Rates Type Sirocco Fan Motor Output Speed Steps 5 Steps and Auto Air Filter — Running Current (Rated) 0.40 - 0.40 - 0.40 / 0.43 - 0.43...
  • Page 37 Specifications Si18-201 " Floor/Ceiling Suspended Dual Type " 2.5kW Class 50Hz 220-230-240V / 60Hz 220-230V Model FLK25HVE FLK25HVEA Rating Capacity Front Panel Color Almond White m³/min Air Flow Rates Type Sirocco Fan Motor Output Speed Steps 5 Steps and Auto Air Filter Removable / Washable / Mildew Proof Running Current...
  • Page 38 Si18-201 Specifications " 5.0kW Class 50Hz 220-230-240V / 60Hz 220-230V Model FLK50HVE FLK50JVEA9 Rating Capacity Front Panel Color Almond White 11.4 11.4 m³/min 10.0 Air Flow Rates Type Sirocco Fan Motor Output Speed Steps 5 Steps and Auto Air Filter Removable / Washable / Mildew Proof Running Current (Rated)
  • Page 39 Specifications Si18-201 " Ceiling Mounted Cassette Type (SkyAir) " 3.75kW Class · 5.2kW Class 50Hz 220-230-240V / 60Hz 220-230V Model FHYC35KVE9 FHYC50KVE9 Rating Capacity 3.75 Front Panel Color White 14.0 15.0 m³/min 10.0 11.0 Air Flow Rates Type Turbo Fan Motor Output Speed Steps...
  • Page 40 Si18-201 Specifications " " " " Duct Connected Type (SkyAir) " 6.15kW Class · 7.7kW Class 50Hz 220-230-240V Model FDYM60FAV1 FDYM03FAV1 Rating Capacity 6.15 Front Panel Color — m³/min — Air Flow Rates — Type Sirocco Fan Motor Output Speed Steps 2 Step and Auto Air Filter...
  • Page 41 Specifications Si18-201 1.3.2 Heat Pump " " " " Wall Mounted Type " 2.5kW Class · 3.5kW Class 50Hz 220-230-240V / 60Hz 220-230V FTX25JVEA9 FTX35JVEA9 Model Cooling Heating Cooling Heating Rating Capacity Front Panel Color Almond White m³/min Air Flow Rates...
  • Page 42 Si18-201 Specifications " 7.1kW Class 50Hz 220-230-240V / 60Hz 220-230V FTXD71JVEA Model Cooling Heating Rating Capacity Front Panel Color Almond White 14.3 18.1 m³/min 12.3 14.9 10.4 11.7 Air Flow Rates Type Cross Flow Fan Motor Output Speed Steps 5 Steps and Auto Air Filter Removal / Washable / Mildew Proof Running Current...
  • Page 43 Specifications Si18-201 " Duct Connected Type " 2.5kW Class · 3.5kW Class 50Hz 220-230-240V / 60Hz 220-230V CDX25HAVEA CDX35HAVEA Model Cooling Heating Cooling Heating Rating Capacity 3.86 4.42 Front Panel Color — 13.0 m³/min 12.0 11.0 Air Flow Rates Type Sirocco Fan Motor Output Speed...
  • Page 44 Si18-201 Specifications " Floor / Ceiling Suspended Dual Type " 2.5kW Class · 3.5kW Class 50Hz 220-230-240V / 60Hz 220-230V FLX25HVEA FLX35HVEA Model Cooling Heating Cooling Heating Rating Capacity 3.86 4.42 Front Panel Color Almond White 10.0 m³/min Air Flow Rates Type Sirocco Fan Motor Output...
  • Page 45 Specifications Si18-201 " Ceiling Mounted Cassette Type (SkyAir) " 3.75kW Class · 5.2kW Class 50Hz 220-230-240V / 60Hz 220-230V FHYC35KVE9 FHYC50KVE9 Model Cooling Heating Cooling Heating Rating Capacity 3.75 4.22 Front Panel Color White 14.0 15.0 m³/min 10.0 11.0 Air Flow Rates Type Turbo Fan...
  • Page 46 Si18-201 Specifications " Duct Connected Type (SkyAir) " 6.0kW Class · 7.7kW Class 50Hz 220-230-240V FDYM60FAV1 FDYM03FAV1 Model Cooling Heating Cooling Heating Rating Capacity Front Panel Color — 20.0 m³/min — Air Flow Rates — Type Sirocco Fan Motor Output Speed Steps 2 Step and Auto...

  • Page 47: Indoor Units (For China)

    Specifications Si18-201 Indoor Units (for China) 1.4.1 Cooling Only " Wall Mounted Type 50Hz 220V Model FTK25JVEC FTK35JVEC Rating Capacity Front Panel Color Almond White Almond White m³/min Air Flow Rates Type Cross Flow Fan Cross Flow Fan Motor Output Speed Steps 5 Steps and Auto...
  • Page 48 Si18-201 Specifications " Duct Connected Type 50Hz 220V Model CDK25HAVEC CDK35HAVEC Rating Capacity Front Panel Color — — 13.0 13.0 m³/min 12.0 12.0 11.0 11.0 Air Flow Rates Type Sirocco Fan Sirocco Fan Motor Output Speed Steps 5 Steps and Auto 5 Steps and Auto Air Filter —...
  • Page 49 Specifications Si18-201 " Floor / Ceiling Suspended Dual Type 50Hz 220V Model FLK25HVEC FLK35HVEC Rating Capacity Front Panel Color Almond White Almond White m³/min Air Flow Rates Type Sirocco Fan Sirocco Fan Motor Output Speed Steps 5 Steps and Auto 5 Steps and Auto Air Filter Removable / Washable / Mildew Proof...
  • Page 50 Si18-201 Specifications " Ceiling Mounted Cassette Type (SkyAir) 50Hz 220V Model FHYC35KV1C9 FHYC50KV1C9 FHYC60KV1C9 FHYC71KV1C9 Rating Capacity 3.75 6.15 Front Panel Color White White 14.0 15.0 19.0 m³/min 10.0 11.0 14.0 Air Flow Rates Type Turbo Fan Turbo Fan Motor Output Speed Steps 2 Steps and Auto...
  • Page 51 Specifications Si18-201 1.4.2 Heat Pump " " " " Wall Mounted Type 50Hz 220V FTX25JVEC FTX35JVEC Model Cooling Heating Cooling Heating Rating Capacity Front Panel Color Almond White Almond White m³/min Air Flow Rates Type Cross Flow Fan Cross Flow Fan Motor Output Speed Steps...
  • Page 52 Si18-201 Specifications " Duct Connected Type 50Hz 220V CDX25HAVEC CDX35HAVEC Model Cooling Heating Cooling Heating Rating Capacity 3.86 4.42 Front Panel Color — — 13.0 13.0 13.0 13.0 m³/min 12.0 12.0 12.0 12.0 11.0 11.0 11.0 11.0 Air Flow Rates Type Sirocco Fan Sirocco Fan...
  • Page 53 Specifications Si18-201 " Duct Connected Type 50Hz 220V CDX25JVEC CDX35JVEC Model Cooling Heating Cooling Heating Rating Capacity 3.86 4.42 Front Panel Color — — 10.4 10.4 11.0 11.0 m³/min 10.2 10.2 Air Flow Rates Type Sirocco Fan Sirocco Fan Motor Output Speed Steps 5 Steps and Auto...
  • Page 54 Si18-201 Specifications " Floor / Ceiling Suspended Dual Type 50Hz 220V FLX25HVEC FLX35HVEC Model Cooling Heating Cooling Heating Rating Capacity 3.86 4.42 Front Panel Color Almond White Almond White 10.0 m³/min Air Flow Rates Type Sirocco Fan Sirocco Fan Motor Output Speed Steps 5 Steps and Auto...
  • Page 55 Specifications Si18-201 " Ceiling Mounted Cassette Type (SkyAir) 50Hz 220V FHYC35KV1C9 FHYC50KV1C9 FHYC60KV1C9 FHYC71KV1C9 Model Cooling Heating Cooling Heating Cooling Heating Cooling Heating Rating Capacity 3.75 4.22 6.15 Front Panel Color White White 14.0 15.0 19.0 m³/min 10.0 11.0 14.0 Air Flow Rates Type...

  • Page 56: Indoor Units (For Taiwan)

    Si18-201 Specifications Indoor Units (for Taiwan) 1.5.1 Cooling Only " Wall Mounted Type " 2.5, 3.5kW Class 60Hz 220V FTK25JAVET Model FTK35JAVET Rating Capacity Front Panel Color Almond White m³/min Air Flow Rates Type Cross Flow Fan Motor Output Speed Steps 5 Steps and Auto Air Filter...
  • Page 57 Specifications Si18-201 " 7.1kW Class 60Hz 220V Model FTKD71JVET Rating Capacity Front Panel Color Almond White 14.3 m³/min 12.3 10.4 Air Flow Rates Type Cross Flow Fan Motor Output Speed Steps 5 Steps and Auto Air Filter Removal / Washable / Mildew Proof Running Current (Rated) 0.23...
  • Page 58 Si18-201 Specifications " Duct Connected Type 60Hz 220V Model CDK25HAVET CDK35HAVET Rating Capacity Front Panel Color — — 13.0 13.0 m³/min 12.0 12.0 11.0 11.0 Air Flow Rates Type Sirocco Fan Sirocco Fan Motor Output Speed Steps 5 Steps and Auto 5 Steps and Auto Air Filter —...
  • Page 59 Specifications Si18-201 " Floor / Ceiling Suspended Dual Type 60Hz 220V Model FLK25HVET FLK35HVET Rating Capacity Front Panel Color Almond White Almond White m³/min Air Flow Rates Type Sirocco Fan Sirocco Fan Motor Output Speed Steps 5 Steps and Auto 5 Steps and Auto Air Filter Removable / Washable / Mildew Proof...
  • Page 60 Si18-201 Specifications " Ceiling Mounted Cassette Type (SkyAir) 60Hz 220V Model FHYC35KVE9 FHYC50KVE9 FHYC60KVE9 FHYC71KVE9 Rating Capacity 3.75 6.15 Front Panel Color White White 14.0 15.0 19.0 m³/min 10.0 11.0 14.0 Air Flow Rates Type Turbo Fan Turbo Fan Motor Output Speed Steps 2 Steps and Auto...
  • Page 61 Specifications Si18-201 1.5.2 Heat Pump " " " " Wall Mounted Type " 2.5kW Class · 3.5kW Class 60Hz 220V FTX25JAVET FTX35JAVET Model Cooling Heating Cooling Heating Rating Capacity Front Panel Color Almond White m³/min Air Flow Rates Type Cross Flow Fan Motor Output Speed Steps...
  • Page 62 Si18-201 Specifications " 7.1kW Class 60Hz 220V FTXD71JVET Model Cooling Heating Rating Capacity Front Panel Color Almond White 14.3 18.1 m³/min 12.3 14.9 10.4 11.7 Air Flow Rates Type Cross Flow Fan Motor Output Speed Steps 5 Steps and Auto Air Filter Removal / Washable / Mildew Proof Running Current...
  • Page 63 Specifications Si18-201 " Floor / Ceiling Suspended Dual Type 60Hz 220V FLX25HVET FLX35HVET Model Cooling Heating Cooling Heating Rating Capacity 2.5 kW Class 3.5 kW Class Front Panel Color Almond White Almond White 10.0 m³/min Air Flow Rates Type Sirocco Fan Sirocco Fan Motor Output Speed...
  • Page 64 Si18-201 Specifications " Ceiling Mounted Cassette Type (SkyAir) 60Hz 220V FHYC35KVE9 FHYC50KVE9 FHYC60KVE9 FHYC71KVE9 Model Cooling Heating Cooling Heating Cooling Heating Cooling Heating Rating Capacity 3.75 4.22 6.15 Front Panel Color White White 14.0 15.0 19.0 m³/min 10.0 11.0 14.0 Air Flow Rates Type...

  • Page 65: Indoor Units (For Europe)

    Specifications Si18-201 Indoor Units (for Europe) 1.6.1 Heat Pump " Wall Mounted Type " 2.5kW Class · 3.5kW Class 50Hz 230V FTX25JAV1NB FTX35JAV1NB Model Cooling Heating Cooling Heating Rating Capacity Front Panel Color Almond White m³/min Air Flow Rates Type Cross Flow Fan Motor Output Speed...
  • Page 66 Si18-201 Specifications " 5.0kW Class · 6.0kW Class 50Hz 230V FTXD50JV1B FTXD60JV1B Model Cooling Heating Cooling Heating Rating Capacity Front Panel Color Almond White 12.3 14.9 13.0 16.5 m³/min 10.7 12.8 11.5 13.7 10.5 11.1 Air Flow Rates Type Cross Flow Fan Motor Output Speed Steps...
  • Page 67 Specifications Si18-201 " Duct Connected Type " 2.5kW Class · 3.5kW Class 50Hz 230V CDX25HAV1NB CDX35HAV1NB Model Cooling Heating Cooling Heating Rating Capacity 3.86 4.42 Front Panel Color — 13.0 m³/min 12.0 11.0 Air Flow Rates Type Sirocco Fan Motor Output Speed Steps 5 Steps and Auto...
  • Page 68 Si18-201 Specifications " 2.5kW Class · 3.5kW Class 50Hz 230V CDX25JV1NB CDX35JV1NB Model Cooling Heating Cooling Heating Rating Capacity 3.86 4.42 Front Panel Color — 13.0 m³/min 12.0 11.0 Air Flow Rates Type Sirocco Fan Motor Output Speed Steps 5 Steps and Auto Air Filter Removable / Washable / Mildew Proof Running Current...
  • Page 69 Specifications Si18-201 " Floor / Ceiling Suspended Dual Type " 2.5kW Class · 3.5kW Class 50Hz 230V FLX25HV1NB FLX35HV1NB Model Cooling Heating Cooling Heating Rating Capacity 3.86 4.42 Front Panel Color Almond White 10.0 m³/min Air Flow Rates Type Sirocco Fan Motor Output Speed Steps...

  • Page 70: Floor Standing Type

    Si18-201 Specifications " Floor Standing Type " 2.5kW Class · 3.5kW Class 50Hz 230V FVX25KZV1B FVX35KZV1B Model Cooling Heating Cooling Heating Rating Capacity Front Panel Color Almond White m³/min Air Flow Rates Type Cross Flow Fan Motor Output Speed Steps 5 Steps and Auto Air Filter Removable / Washable / Mildew Proof...
  • Page 71 Specifications Si18-201 Specifications...

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

    Si18-201 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 and Name and Name and Name and Name 1.

  • Page 73: Printed Circuit Board Connector Wiring Diagram And Name

    Printed Circuit Board Connector Wiring Diagram and Name Si18-201 1. Printed Circuit Board Connector Wiring Diagram and Name Branch Provider Unit BPMK928B42, B43 Name of Connector 1) S1 Connector for Bypass Electronic Expansion Valve 2) S2 to S4 Connector for Electronic Expansion Valve to Room A, B and C 3) S5 Connector for Thermistors Other Designations...

  • Page 74: Outdoor Unit Rmk (X) 140Jvmt (C) 9 (8), Rmk140Javm, Rmx140Jvmb, Rmk (X) 140Jzvma (B)

    Si18-201 Printed Circuit Board Connector Wiring Diagram and Name Outdoor Unit RMK (X) 140JVMT (C) 9 (8), RMK140JAVM, RMX140JVMB, RMK (X) 140JZVMA (B) Cooling Only RMK140JVMT (C) 9 (8), RMK140JAVM, RMK140JZVMA Heat Pump RMX140JVMT (C) 9 (8), RMX140JVMB, RMX140JZVMB Printed Circuit Printed Circuit Board (1) (Control PCB) Printed Circuit Board (2) (Filter PCB) Board...
  • Page 75 Printed Circuit Board Connector Wiring Diagram and Name Si18-201 Other Designations 1) H1P (LED A on PCB 4) LED for Outdoor Unit Status-normal 2) H2P (PCB 1) LED for Outdoor Unit Status-normal 3) H3P (PCB 3) LED for Outdoor Unit Fan Status-normal 4) H4P (PCB 3) LED for Outdoor Unit Fan Status-normal 5) LED 2~4 (PCB 4)
  • Page 76 Si18-201 Printed Circuit Board Connector Wiring Diagram and Name Printed Circuit Board (2) (Filter PCB) Printed Circuit Board (3) (Fan Control) Printed Circuit Board (4) (Indicator PCB) Printed Circuit Board Connector Wiring Diagram and Name...

  • Page 77: Ftk25 / 35J Series, Ftx25 / 35J Series, Ftxd25 / 35K Series, Fvx25 / 35K Series

    Printed Circuit Board Connector Wiring Diagram and Name Si18-201 FTK25 / 35J Series, FTX25 / 35J Series, FTXD25 / 35K Series, FVX25 / 35K Series Cooling Only FTK25 / 35JVE (A) 9, FTK25 / 35JVEC, FTK25 / 35JAVET Heat Pump FTX25 / 35JVEA9, FTX25 / 35JVEC, FTX25 / 35JAVET, FTX25 / 35JAV1NB, FTXD25 / 35KZV1B, FVX25 / 35KZV1B Printed Circuit...
  • Page 78 Si18-201 Printed Circuit Board Connector Wiring Diagram and Name Printed Circuit Board (1)~(3) Control P C B (1) Signal receive P C B (2) LED1 LED2 LED3 12V check Jumper ground Intelligent eye sensor P C B (3) 5V check Jumper (RL001) Printed Circuit Board (1)~(3) Detail...

  • Page 79: Ftk50~60Hv Series, Ftkd50~71Jv Series, Ftx50~60Hv Series, Ftxd50~71Jv Series

    Printed Circuit Board Connector Wiring Diagram and Name Si18-201 FTK50~60HV Series, FTKD50~71JV Series, FTX50~60HV Series, FTXD50~71JV Series Cooling Only FTK50 / 60HVEC, FTKD50 / 60 / 71JVE (A) (9), FTKD50 / 60 / 71JVET Heat Pump FTX50 / 60HVEC, FTXD50 / 60 / 74JVEA (9), FTXD50 / 60 / 71JVET, FTXD50 / 60 / 71JV1B Printed Circuit Printed Circuit Board (1) (Control PCB)
  • Page 80 Si18-201 Printed Circuit Board Connector Wiring Diagram and Name Printed Circuit Board (2) (Power Supply PCB) Printed Circuit Board (3) (Display PCB) Printed Circuit Board (4) (Signal Receiver PCB) Printed Circuit Board Connector Wiring Diagram and Name...

  • Page 81: Cdx25~60Hav Series, Cdk25~60Hav Series

    Printed Circuit Board Connector Wiring Diagram and Name Si18-201 CDX25~60HAV Series, CDK25~60HAV Series Cooling Only CDK25 / 35 / 50 / 60HAVE (A) (C) (T) Heat Pump CDX25 / 35 / 50 / 60HAVEA (C), CDX25 / 35 / 50 / 60HAV1NB, CDX25 / 35 / 50 / 60JV1NB, CDX25 / 35JVEC Printed Circuit Printed Circuit Board (1) (Control PCB)
  • Page 82 Si18-201 Printed Circuit Board Connector Wiring Diagram and Name Printed Circuit Board (1)~(3) Control P C B (1) 12V check Jumper ground sensor P C B (3) 5V check Jumper (RL001) Printed Circuit Board (1)~(3) Detail Printed Circuit Board Connector Wiring Diagram and Name...

  • Page 83: Flk25~60Hv Series, Flx25~60Hv Series, Flk50 / 60Jv Series, Flx50 / 60Jv Series

    Printed Circuit Board Connector Wiring Diagram and Name Si18-201 FLK25~60HV Series, FLX25~60HV Series, FLK50 / 60JV Series, FLX50 / 60JV Series Cooling Only FLK25 / 35 / 50 / 60HVE (C) (T), FLK25 / 35HVEA, FLK50 / 60JVEA (9) Heat Pump FLX25 / 35HVEA, FLX25 / 35HV1NB, FLX25 / 35 / 50 / 60HVEC (T), FLX50 / 60JV1B Printed Circuit...
  • Page 84 Si18-201 Printed Circuit Board Connector Wiring Diagram and Name Printed Circuit Board (1) (Control PCB) Printed Circuit Board (2) (Power Supply PCB) Printed Circuit Board Connector Wiring Diagram and Name...
  • Page 85 Printed Circuit Board Connector Wiring Diagram and Name Si18-201 Printed Circuit Board (3) (Display PCB) Printed Circuit Board (4) (Signal Receiver PCB) Printed Circuit Board Connector Wiring Diagram and Name...

  • Page 86: Fhyc35~71Kv Series

    Si18-201 Printed Circuit Board Connector Wiring Diagram and Name FHYC35~71KV Series Cooling Only / FHYC35 / 50 / 60 / 71KVE9, FHYC35 / 50 / 60 / 71KV1C9 Heat Pump Name of Connector 1) X5A Connector for Wired Remote Controller 2) X10A Connector for Transformer 3) X11A...
  • Page 87 Printed Circuit Board Connector Wiring Diagram and Name Si18-201 Printed Circuit Board Printed Circuit Board Connector Wiring Diagram and Name...

  • Page 88: Fdym60Fa, Fdym03Fa Series

    Si18-201 Printed Circuit Board Connector Wiring Diagram and Name FDYM60FA, FDYM03FA Series Cooling Only / FDYM60FAV1, FDYM60FAV1C, FDYM60FAVAL FDYM03FAV1, FDYM03FAV1C, FDYM03FAVAL Heat Pump Name of Connector 1) X5A Connector for Wired Remote Controller 2) X10A Connector for Transformer 3) X11A Connector for Transformer 4) X15A Jumpered...
  • Page 89 Printed Circuit Board Connector Wiring Diagram and Name Si18-201 Printed Circuit Board Printed Circuit Board Connector Wiring Diagram and Name...

  • Page 90: Part 4 Main Functions Indoor Unit

    Si18-201 Part 4 Part 4 Part 4 Part 4 Main Functions Main Functions Main Functions Main Functions Indoor Unit Indoor Unit Indoor Unit Indoor Unit 1. Main Functions..................78 1.1 Main Functions in Split Type ..............78 1.2 SkyAir .....................98 1.3 Cautions when SkyAir [Auto] [FAN] are used........100 The RMK140JAVM specifications are special.

  • Page 91: Main Functions

    Main Functions Si18-201 1. Main Functions Main Functions in Split Type 1.1.1 Power-Airflow Flap & Diffuser For FTK, FTX50/ The large flaps send ample volume of warm air downward to heat the feet of people in the room, 60 H Series Only while the wide-angle diffuser ensures the air reaches every corner of the room.
  • Page 92 Si18-201 Main Functions Temperature Distribution Air conditioner 24ºC 25ºC 26ºC 28ºC 28ºC 26ºC 6.4m (ML024) < Conditions > Outside temperature: 7ºCDB, thermostat setting: 23ºC, air flow setting: High (H tap), approximately 40 minutes after operation start, height of air outlet: approx. 2 m. *Note that temperature distribution varies depending on the heat insulation, furniture arrangement and other factors in the room.
  • Page 93 Main Functions Si18-201 Flap Angle During Heating During Cooling Capable of sending air to the center of a room even if it is installed at a corner of the room. 1.1.3 Horizontal Auto-Swing (Up and Down) For FTK, FTX50/ Auto-swing angles are about “A” degrees when the fan is ON, and about “B” degrees when the cooling or program dry operation is ON.
  • Page 94 Si18-201 Main Functions Cooling, Dry, Operation (For Cooling Only Model) Cooling FTK50/60H 20º 20º Series 15º ↔ 40º 15º ↔ 40º Cooling, Dry, Heating Operation (For Heat Pump Model) Cooling Heating 20º ↔ 40º FTK50/60H 20º 20º Series 15º ↔ 40º 15º...
  • Page 95 Main Functions Si18-201 1.1.4 Wide Angle Flaps, Louvers and Auto-Swing For FTK(X)25/35J It can be commanded for J type by means of a user setting to select either any one desired Series Only position among the five-step directions of air flow adjusted on a remote controller, or Auto- swing.
  • Page 96 Si18-201 Main Functions Heating (In The Case of Swing- OFF Start) Heating (In The Case of Swing- ON Start) Note: The flaps remain in the preset position for about 10 seconds before they return to the full-open processing. Main Functions...

  • Page 97: Fan Speed Control For Indoor Units

    Main Functions Si18-201 1.1.6 Fan Speed Control for Indoor Units For FTK(X)25/35J, The airflow rate can be automatically controlled depending on the difference between the set FTK(X)50/60 H temperature and the room temperature. This is done through phase control and Hall IC control. Series Control Mode For more information about Hall IC, refer to ‘Hall IC check (A6)’...
  • Page 98 Si18-201 Main Functions 1.1.7 ON/OFF Button on Indoor Unit For FTK, FTX50/ An ON/OFF switch is provided on the front panel of the unit. Use this switch when the remote 60 H Series Only controller is missing or if its battery has run out. Every press of the switch changes from Operation to Stop or from Stop to Operation "...
  • Page 99 Main Functions Si18-201 " Clean the Front You may wipe it with a soft cloth soaked in water. " Only neutral detergent may be used. Grille. " You may wash the grille with water. After washing, dry it with cloth, then dry it up in the shade.

  • Page 100: Program Dry Function

    Si18-201 Main Functions 1.1.12 Mold Proof Air Filter For FTK(X)25/35 J, The filter net is treated with mold resisting agent TBZ (harmless, colorless, and odorless). Due FTK(X)50/60 H to this treatment, the amount of mold growth is much smaller than that of normal filters. Series 1.1.13 Pre-Heat Operation (Heat Pump Only) For FTK(X)25/35...
  • Page 101 Main Functions Si18-201 ON point 0.5 C Frequency switching point OFF point 5 min 5 min Compressor Stop Stop Stop control Extra-low air flow *55Hz *55Hz Stop Stop Stop Indoor unit fan Extra-low air flow Low air flow Low air flow LHz indicates low frequency.

  • Page 102: Night Set Mode

    Si18-201 Main Functions 1.1.17 Night Set Mode When the OFF Timer is set, the New Night Set Circuit automatically activates. The Night Set Circuit automatically switches the fan speed to a low setting to minimize operating noise. On the other hand, the New Night Set Circuit maintains the airflow setting made by users. (Some models are equipped with an Night Set Circuit ON switch.) The Night Set The Night Set Circuit continues heating or cooling the room at the set temperature for the first...

  • Page 103: Intelligent Eye

    Main Functions Si18-201 1.1.21 Intelligent Eye For FTK(X)25/35 J The function that detects existence of humans in the air-conditioned room and reduces the Series Only capacity when no humans are available in the room in order to save electricity by means of a human motion sensor.
  • Page 104 Si18-201 Main Functions " Since the set temperature is shifted by 2°C higher for 40 minutes, compressor speed becomes low and can realize energy saving operation. But as thermostat is prone to be off by the fact that the set temperature has been shifted, the thermostat-off action is prohibited in 40 minutes so as to prevent this phenomena.

  • Page 105: Program Dry Operation

    Main Functions Si18-201 1.1.23 Program Dry Operation By the function of the microcomputer, program dry operation reduces the humidity keeping the temperature in a minimum drop. Room temperature and air volume can not be controlled by room temperature adjusting button and air volume adjusting button because they are controlled automatically.
  • Page 106 Si18-201 Main Functions 1.1.24 Cooling Monitoring Function Monitoring function is activated while cooling and program dry operation are suspended. Compressor ON Compressor OFF <B> Differential <A> M1 or less OF or more M2 or less (RL003) TOF: Compressor recycling guard timer (3-minute timer) TM1: 5-minute timer TM2: 4-minute timer <A>...

  • Page 107: Freeze Protection Function

    Main Functions Si18-201 1.1.25 Freeze Protection Function When the indoor heat exchanger temperature falls below “A”°C in cooling or program dry operation, " the compressor and the outdoor fan are forced to turn OFF, and " the indoor fan rotates at the L tap (in cooling operation) or W2 tap (in program dry operation). Note that this function is not activated for 6 minutes after compressor turns ON.
  • Page 108 Si18-201 Main Functions 1.1.29 Air Flow Automatic (Auto Fan Speed) In cooling operation, if automatic airflow has been selected, the wind flow is determined according to the room temperature and the temperature setting. BLADE ANGLE UP/DOWN : (AUTOMATIC) RIGHT/LEFT : (MANUAL) COOLING FLAP (RL005)

  • Page 109: Powerful Operation

    Main Functions Si18-201 1.1.31 Emergency Operation Function (ON/OFF Switch) The unit can be turned ON only by pressing ON/OFF operation switch. This is convenient when the remote controller cannot be found or if the batteries are dead. The operation condition is as follows: Operation mode Cool Fan speed...
  • Page 110 Si18-201 Main Functions 1.1.33 Filter Check Indicator " The filter check indicator located at the center of the unit will indicate the time for cleaning the air filters. The indicator will indicate an appropriate cleaning time depending on the environment (dusty place or not).

  • Page 111: Skyair

    Main Functions Si18-201 SkyAir Thermostat Existing cooling/heating preset temperature range has been changed. Control Draft Avoidance Draft is circumvented by delaying transfer of the flap to the Po0 (horizontal) position for a certain amount of time when defrosting and in the heating mode with the thermostat OFF. Control 1 Main Functions...
  • Page 112 Si18-201 Main Functions Draft Avoidance When hot start is cancelled or when cold air prevention control is finished, if the fan speed is set to “H,” the fan turns at L speed for a certain amount of time, thus avoiding draft while the flap is Control 2 moving.

  • Page 113: Cautions When Skyair [Auto] [Fan] Are Used

    Main Functions Si18-201 Cautions when SkyAir [Auto] [FAN] are used 1.3.1 Heat Pump Model The Corresponding Models FHYC35 / 50 / 60 / 71K FDYM60 / 03 F (A) Excludes the case connecting the cooling only models. Cautions 1. In case of plural and simultaneous operation including the corresponding models stated above, the mode change (Cooling →...

  • Page 114: Part 5 Main Functions Outdoor Unit / Bp Unit

    Si18-201 Part 5 Part 5 Part 5 Part 5 Main Functions Main Functions Main Functions Main Functions Outdoor Unit / BP Unit Outdoor Unit / BP Unit Outdoor Unit / BP Unit Outdoor Unit / BP Unit 1. Refrigerant System and Function of Functional Parts of Outdoor Unit..................103 1.1 Refrigerant System and Function of Functional Parts of Outdoor Unit ..................103...
  • Page 115 Si18-201 3.33 BP Unit Motorized Valve Control in High Discharge Pipe Temperature.................162 3.34 Inter-BP Units Heating Heat Exchanger Isothermal Control ....163 3.35 Inter-BP Units Gas Pipe Isothermal Control.........164 3.36 BP Unit Motorized Valve Control by Target Discharge Pipe Temperature.................165 3.37 4-Way Valve Operation ................166 3.38 JIS Mode ....................167 3.39 Pump Down Operation .................168 3.40 Protection Control of SkyAir Indoor Units..........169...

  • Page 116: Refrigerant System And Function Of Functional Parts Of Outdoor Unit

    Si18-201 Refrigerant System and Function of Functional Parts of Outdoor Unit 1. Refrigerant System and Function of Functional Parts of Outdoor Unit Refrigerant System and Function of Functional Parts of Outdoor Unit Main Functions...

  • Page 117: Major Functional Parts

    Refrigerant System and Function of Functional Parts of Outdoor Unit Si18-201 Major Functional Parts Compressor : JT100F-VD The application of Inverter drive enables the capacity control for 1 Hz/step at 25 to 98Hz in cooling operation or at 30 to 105Hz in heating operation. Oil separator Collects oil discharged from the compressor.
  • Page 118 Si18-201 Refrigerant System and Function of Functional Parts of Outdoor Unit EVT : Motorized valve in non-operating room BP unit In cooling operation, fully closed. In heating operation, carries out the control equal to Super-multi unit control (entire system control). EVH : Bypass motorized valve in BP unit Opens at specified opening degree when oil collecting operation is conducted in heating mode.

  • Page 119: Protective Devices, Thermistors, Sensors

    Refrigerant System and Function of Functional Parts of Outdoor Unit Si18-201 Protective Devices, Thermistors, Sensors A HPS When the high pressure rose abnormally, HPS is actuated to stop the compressor. B Low pressure sensor Carries out controls such as low pressure protection (compressor protection), and ending pump down operation, and judgement of gas shortage.

  • Page 120: Protection Device

    Si18-201 Protection Device 2. Protection Device Outdoor Unit RMX140JVM Compressor JT100F-VD 3.3kW × 1 Scroll J1HC Crankcase Heater — High Pressure Protection (3SA45022-1) OFF: 2.94MPa ON: 2.16MPa Low Pressure Sensor (3SA48112-1) PS8040A 0~0.98MPa Electronic Main Body (2SB45422-1) LAM-B30YHDM-1 Expansion Valve Coil (3SB45348-8) Electronic Main Body (2SB45422-1)

  • Page 121: Bp Unit

    Protection Device Si18-201 BP Unit BPMK928B42, BPMK928B43 FU1 ~ 4 FUSE (3EB82010-1) 250V 3.15A Electronic Main Body (2SB45422-1) LAM-B30YHDM-1 Expansion Valve Coil (3SB45348-10) Electronic Main Body (2SB45422-1) Expansion Valve Coil (3SB45348-10) Electronic Main Body (2SB45422-1) Expansion Valve Coil (3SB45348-10) Electronic Main Body (2SB45422-1) Expansion Valve Coil (3SB45348-10)

  • Page 122: System Control

    Si18-201 System control System control Outline of System Control Power supply ON Compressor / OFF Unit stop (standby control) 3-minutes standby · Warming-up function · Equalizing control · Cooling electrical switch box · Fan OFF delay ON command OFF command Compressor / ON (Before equalizing) the previous...

  • Page 123: Mode Configuration

    System control Si18-201 Mode Configuration Air Conditioner Air conditioner control mode Control Mode Standby Mode Standby Control at Power ON Cooling Standby Operation Heating Standby Operation Pressure-Equalizing Control Installation/Servicing Operation Pump-Down Operation Mode Cooling Test Operation Heating Test Operation Normal Operation Mode Cooling Mode Heating Mode Stop Mode...

  • Page 124: Standby Control At Power On

    Si18-201 System control Standby Control at Power ON Purpose of the To initialize the motorized valve at power ON, to determine the valve opening degree and promote pressure equalization, and to conduct a standby operation. Function The reason for promoting pressure equalization at power ON is to prevent the compressor from locking due to insufficient pressure equalization that could result if units are restarted immediately after reset during operation (due to momentary power outage and others).

  • Page 125: Cooling / Heating Standby Operation At Startup

    System control Si18-201 Cooling / Heating Standby Operation at Startup Purpose of the To prepare for the next startup after operation shutdown and to collect refrigerant into the receiver in order to prevent liquid refrigerant from returning to the accumulator and compressor Function at startup.

  • Page 126: Equalizing Control

    Si18-201 System control Equalizing Control Purpose of the To provide equalizing control after a standby operation in order to prevent the compressor from locking due to insufficient equalizing and to ensure smooth compressor startup. Function Equalizing Control in Cooling 3 min standby timer 180 sec Standby operation...
  • Page 127 System control Si18-201 Equalizing Control in Heating 3 min standby timer 180 sec Standby operation 4-way valve 140 sec (Delay timer for OFF) Command frequency 700 rpm Outdoor unit upper fan 650 rpm Outdoor unit lower fan Delay time for fan OFF 150 sec 450 pulses 450 pulses...

  • Page 128: Determination Of Initial Frequency

    Si18-201 System control Determination of Initial Frequency 3.6.1 Determination of Operation Frequency Purpose of the To control the operating frequency in order to ensure compressor reliability and optimise the operating condition. Function ∆ Outline D signals (difference between room temperature and temperature setting) from BP units are used to determine the frequency corresponding to the capacities of the indoor units connected to the BP units.
  • Page 129 System control Si18-201 3.6.2 BP Unit Command Conversion 1. ∆ D (room temperature − temperature setting) signals from BP units are converted to α values. ∆ D signals from BP units are used as the α value in frequency commands (excludes when Powerful function is in operation).
  • Page 130 Si18-201 System control 3.6.3 Determination of Initial Frequency Initial frequency setting (determination of initial operating frequency based on S value and ∆ D signal ( α value)) Outline When the compressor starts and when a change occurs in the conditions such as change of room unit operations, the sum of the maximum α...
  • Page 131 System control Si18-201 Determination of initial frequency for cooling Initial frequency FSR is determined based on the correction of outside air temperature (DOA) and discharge pipe temperature (DO) in accordance with the above matrix. FSR = KFIDO × (2/128 × (DOA - 35°C) × FINI1+FINI1) KFIDO varies depending on discharge pipe temperature DO When DO ≥...
  • Page 132 Si18-201 System control Determination of initial frequency for heating Initial frequency FSR is determined based on the correction of outside air temperature (DOA) and discharge pipe temperature (DO) in accordance with the above matrix. FSR = KFIDO × (-5/128 × (DOA - 15°C) × FINI1+FINI1) 3/ KFIDO varies depending on discharge pipe temperature DO When DO ≥...

  • Page 133: Oil Return Operation

    System control Si18-201 Oil Return Operation Purpose of the To collect refrigerating machine oil that adheres on the internal connection pipe wall during regular operation and send it to the compressor. Function Outline The oil recovery operation is conducted in the cooling cycle in both heating and cooling modes. The oil recovery operation collects oil dissolved in liquid refrigerant from High Hz and Low Hz (two types in both cooling and heating) and the section between Refnet joint and branch unit if there is a non-operating branch unit during cooling operation.
  • Page 134 Si18-201 System control Oil recovery operation in heating mode When starting-up of heating 55Hz Time for judgement on oil Cumulative heating time recovery 0 Hz 0 Hz Compressor operation frequency start. TOW1(150min) TOW3(60sec) (2min) TOW4(0sec) TOW5(60sec) TOW10(60sec) TOW2(6min) (1min) 4-way valve OFF 4-way valve ON timer timer for oil recovery for oil recovery...

  • Page 135: Defrost Operation

    System control Si18-201 Defrost Operation Outline During heating operation, the outdoor heat exchanger intermediate temperature of a frosted unit is estimated based on the outdoor temperature and compressor output frequency. If the outdoor heat exchanger intermediate temperature is lower than the estimated defrosting temperature, the unit is considered to be frosted;...

  • Page 136: Pre-Equalization Standby Operation

    Si18-201 System control Pre-Equalization Standby Operation Outline In local air conditioner control mode and frequency fix mode, this function collects surplus refrigerant in the receiver before the operation mode is changed from cooling or the compressor stops due to thermostat OFF. This ensures proper oil level and dilution for the next startup operation.

  • Page 137: Equalizing Control

    System control Si18-201 3.10 Equalizing Control Outline This function provides equalizing control after a standby operation in order to prevent the compressor from locking due to insufficient equalization and to ensure smooth compressor startup. Details Equalizing control in cooling Equalizing control in cooling 3 min standby timer 180sec Standby operation...
  • Page 138 Si18-201 System control Equalizing control in heating Standby 3 min standby timer 180 sec operation 4-way valve (OFF delay timer) 140 sec Command frequency 700 rpm Outdoor unit upper fan 650 rpm Outdoor unit lower fan Fan OFF delay 150 sec time 450 pulses 450 pulses...

  • Page 139: Capacity Control

    System control Si18-201 3.11 Capacity Control 3.11.1 Outdoor Unit Motorized Valve Low Pressure (Cooling Capacity) Control Outline This functions forms a discharge-suction bypass circuit to prevent the suction pressure from dropping (freezing of indoor unit) during cooling due to excessively low indoor heat exchange capacity even when operating at the minimum frequency.
  • Page 140 Si18-201 System control 3.11.2 Outdoor Unit Motorized Valve High Pressure (Heating Capacity) Control Outline This function opens the gas pipe motorized valve then forms a discharge-suction bypass circuit to prevent high pressure rise during cooling due to excessively low indoor heat exchange capacity even when operating at the minimum frequency.

  • Page 141: Peak Cut Control

    System control Si18-201 3.12 Peak Cut Control Outline Based on the indoor heat exchanger intermediate temperature signal sent from the indoor unit, the compressor output frequency is regulated to lower the compressor capacity in order to prevent an abnormal increase of the high pressure. Details Zones are produced based on the heat exchanger temperature signal sent from the BP unit (indoor unit), and the peak-cut control prevents an abnormal rise of the high pressure.

  • Page 142: Freeze-Up Prevention

    Si18-201 System control 3.13 Freeze-Up Prevention Outline According to the freeze prevention status sent from the BP unit, the compressor output frequency is regulated to decrease the compressor capacity in order to prevent the indoor heat exchanger from freezing. Details Zones are produced based on the freeze prevention status signal sent from the BP unit (indoor unit), and the freeze prevention control prevents freezing of the indoor unit.

  • Page 143: Gas Shortage Malfunction

    System control Si18-201 3.14 Gas Shortage Malfunction Outline A gas shortage malfunction is detected by using electric current and by judging the discharge pipe temperature and motorized valve opening degree. Details Gas shortage detection based on current The current-based gas shortage detection is conducted when the operating frequency exceeds 55 Hz.

  • Page 144: Discharge Pipe Control

    Si18-201 System control 3.15 Discharge Pipe Control Outline With the internal compressor temperature used as a substitute of the discharge pipe temperature, when the discharge pipe temperature exceeds the specified level, the discharge pipe control regulates the upper limit of the output frequency to prevent the internal pressure from rising. (This function serves the same purpose as the discharge pipe high temperature control that regulates the motorized valve.) Details...

  • Page 145: Input Current Control

    System control Si18-201 3.16 Input Current Control 3.16.1 Input Current Control I Outline The input current is detected by CT during compressor operation, and the input current value is used to control the upper limit of the frequency. As shown in the diagram below, the constraint frequency is varied differently in the stop, drooping, no-change and reset zones.
  • Page 146 Si18-201 System control Details The input current is used to control the upper limit of the operating frequency in order to maintain the temperature around the electric parts under a certain level during cooling overload condition. When the outside temperature (DOA) is higher than 38°C, input current upper-limit value I3CH (27) A is decreased at a rate of (96/128) A/°C.
  • Page 147 System control Si18-201 3.16.2 Input Current Control II (High Pressure Control) Outline Based on the input current and input voltage, the compressor output frequency is regulated to decrease the compressor capacity in order to prevent abnormal rising of the high pressure. Note The peak-cut control is similar to this function, but it cannot effectively detect high pressure during transitional condition due to the thermistor's tracing performance;...

  • Page 148: Wet Protection Control I

    Si18-201 System control 3.17 Wet Protection Control I Outline When the outside air temperature is low, the lower limit of operating frequency is restricted to ensure the compressor suction air humidity. Details The lower limit of operating frequency (FCG) is set according to following formula and diagram when the outside air temperature (DOA) is 6.5°C or lower during heating operation.

  • Page 149: Electric Parts Cooling And Electric Parts / Fin Temperature Control

    System control Si18-201 3.18 Electric Parts Cooling and Electric Parts / Fin Temperature Control Outline This function cools the electric parts (outside fan ON control) and turns off the inverter to prevent excessive heating that can cause malfunctions of the electric parts and reduces their service life.

  • Page 150: Differential Pressure Control

    Si18-201 System control 3.19 Differential Pressure Control Outline This function sets an upper limit for the fan rotation speed according to the outside temperature and outdoor heat exchanger temperature during cooling operation with low outside temperature. By limiting the fan rotation, the function ensures sufficient differential pressure. In cooling operation (outside temperature DOA ≤...

  • Page 151: Year-Round Cooling-Only Function

    System control Si18-201 3.20 Year-Round Cooling-Only Function Outline This function turns off the compressor based on the conditions of the outside temperature and high pressure equivalent saturation temperature to ensure compressor reliability. Details The year-round cooling-only function provides two types of shutdown function. One is based on the outside temperature and high pressure equivalent saturation temperature, and the other is based only on the outside temperature.

  • Page 152: Nighttime Low Noise Control

    Si18-201 System control 3.21 Nighttime Low Noise Control Purpose of the This function lowers the operating sound when the noise causes problems during the night. Function Outline The function turns the nighttime low-noise instruction ON and OFF according to the outside temperature condition.

  • Page 153: Pi Control

    System control Si18-201 3.22 PI Control Based on the ∆ D signal, MAX α of the command frequency is monitored every 20 seconds, and Outline PI control is provided accordingly. (Coefficient of PI control varies for each S value.) At every sampling time TFSMP, the maximum value (MAX α ) of α value is calculated, and if the P Control result differs from the previous value, the frequency is changed according to the amount of fluctuation.

  • Page 154: Warm-Up Function

    Si18-201 System control 3.23 Warm-Up Function Outline This function operates the inverter in a open-phase mode to warm up the compressor when it receives a warm-up command under certain outdoor air temperature and discharge pipe temperature conditions. Details 1. Preheat conditions When the stop mode remains for 63 minutes or more and when the capacitor is not discharging (1) When preheat permit command is issued (EEPROM constant)

  • Page 155: Compressor Protection Control

    System control Si18-201 3.24 Compressor Protection Control Purpose of the This function ensures appropriate compressor oil level and dilution at startup. Function The following upper-limit frequency control is provided at the compressor OFF → ON edge. Outline (This function is inactive during defrost control.) Details (M1032) 1st stage...

  • Page 156: Fan Control

    Si18-201 System control 3.25 Fan Control Purpose of the This function changes the fan rotation speed or stop the fan operation according to the operating condition in order to prevent abnormal system operation (overload operation) and Function ensure compressor reliability. 3.25.1 Fan Control under Normal Condition Outline The following fan control functions are provided in normal operation.
  • Page 157 System control Si18-201 Cooling operation Normal fan control DOAL1 (37˚C) Zone H DOAL2 (8˚C) Zone L DOAL3 (-5˚C) FFANC (118Hz) FHP (118Hz) (M1035) Fan control in normal heating mode Due to outside air temperature DOA and output frequency FOUT, conditions listed below are met, the silent mode is activated and sets the fan rotation speed to FANLW.

  • Page 158: Motorized Valve Control Of Outdoor Unit

    Si18-201 System control 3.26 Motorized Valve Control of Outdoor Unit 3.26.1 Outline of Motorized Valve Control Outline The EVL and EVG valve opening operations switch the with/without-receiver selection. Cooling mode " When EVL is fully closed (without receiver), the BP motorized valve provides the system control and distribution control.
  • Page 159 System control Si18-201 3.26.2 Outdoor Unit Motorized Valve Opening Restriction Outline This function restricts the opening degree of the outdoor unit motorized valves (discharge bypass motorized valve, gas pipe motorized valve and liquid pipe motorized valve) in order to quickly stabilize and control the system. 1.
  • Page 160 Si18-201 System control 3. EVL (liquid pipe motorized valve) opening restriction EVL (liquid pipe motorized valve) " ELV fully closed during normal heating " Other than the condition mentioned left operation (after elapsed 30 sec or more) EVLMAX : 450 pulses EVLMAX : 100 pulses EVLMIN + EVLDP (10)
  • Page 161 System control Si18-201 3.26.3 Outdoor Unit Motorized Valve Control in Startup and During the Number of Operating Room Units Change Outline This function improves the convergibility of refrigerating cycle during startup (operation startup, when the number of operating room unit changes, in thermostat reset). It also ensures sufficient oil level for compressor startup (low-temperature heating operation start).
  • Page 162 Si18-201 System control In case of KBPIW 1.5 ≤ FPIMN / initial frequency " When initial frequency is equal or smaller than FPIMN / 1.5 = 0.67, EVL = 52 EVG = 450 EVP = 267 × KBP - 349 The ending condition for startup control and the control when the number of operating room unit changes, Cooling mode...
  • Page 163 System control Si18-201 3.26.5 Outdoor Units Motorized Valve Control by Target Discharge Pipe Temperature Outline This function adjusts the motorized valve opening in order to set the actual discharge pipe temperature close to the target discharge pipe temperature obtained from the indoor heat exchanger temperature and outdoor heat exchanger temperature.

  • Page 164: Cooling Outdoor Unit Sc Control

    Si18-201 System control 3.27 Cooling Outdoor Unit SC Control Outline This function controls the subcooling of the outdoor heat exchanger in order to ensure maximum use of the outdoor heat exchanger capacity. " Normal cooling operation ... Controls the difference between the high pressure and outside temperature to the temperature difference most suitable for the heat exchanger capacity.

  • Page 165: Bp Unit Motorized Valve Control

    System control Si18-201 3.28 BP Unit Motorized Valve Control Purpose of the This function provides instructions regarding the absolute flow rate, relative flow rate and fully closing from the outdoor unit to the BP unit in order to ensure outdoor unit compressor safety Function and optimum refrigerating cycle of the system.
  • Page 166 Si18-201 System control 3.28.4 Full Closing of Motorized Valves Purpose of the The motorized valves are initialized when the power is turned on. Function Details The following processes are conducted. 1. Conducts P1 pulses close when power is turned on, and sets current opening to 0 pulse (fully closing process).
  • Page 167 System control Si18-201 3.28.6 Control Based on Relative Flow Rate Instruction Purpose of the This function operates the motorized valve based on the relative flow rate instruction sent from Function the outdoor unit. Outline This function distributes the relative flow rate instruction sent from the outdoor unit to each room unit in connection, and obtain the amount of change in the target motorized valve flow rate.

  • Page 168: Gas Pipe Isothermal Control In Cooling Operation

    Si18-201 System control 3.29 Gas Pipe Isothermal Control in Cooling Operation Purpose of the This function ensures appropriate refrigerant distribution when many room units are operating in the cooling mode. Function Outline The gas pipe temperatures of operating room units are detected by the gas pipe thermistors, and the motorized valves' flow rates are corrected so as to equalize the temperatures of the gas pipes.
  • Page 169 System control Si18-201 Outside Air Temperature Gas Pipe Lower-Limit Temperature The motorized valve operating amount is determined based on deviation EGA between each room unit's gas pipe temperature and of DGAV after GFTUYU correction and previous deviation EGAZ. (Example) The following example is based on room A. EGA = DGA - DGAV When the operating flow rate of EVA is QRGA QRGA = KPCB (0.05) ×...

  • Page 170: Sh Control In Cooling Operation

    Si18-201 System control 3.30 SH Control in Cooling Operation Purpose of the This function ensures appropriate refrigerant distribution when many room units are operating in the cooling mode. Function Outline The heat exchanger temperatures and gas pipe temperatures of operating room units are detected by the gas pipe thermistors, and the motorized valves' flow rates are corrected so as to adjust each room unit's heat exchanger temperature and gas pipe temperature (hereafter referred to as SH) close to the target values.
  • Page 171 System control Si18-201 Regarding target superheated degree SH (Example) The following example is based on room A. When the sum of heat exchanger temperature (DCA) and target superheated degree is smaller than gas pipe lower limit temperature, the following condition is set: DSH = Gas pipe lower-limit temperature –...

  • Page 172: Sc Control In Heating Operation

    Si18-201 System control 3.31 SC Control in Heating Operation Purpose of the This function ensures appropriate refrigerant distribution when room units are operating in the heating mode. Function Outline The function serves the following two main purposes. 1) Appropriate refrigerant distribution to each room unit In the case of heating SC control 2, the motorized valves of only operating room units are regulated.
  • Page 173 System control Si18-201 Details The heat exchanger intermediate temperature and liquid pipe temperature are detected at every sampling time of 60 sec of the heating SC control. The range of target SC : 3°C ≤ SC1 ≤ 8°C Capacity supply QCOMP (%) (M1050) The motorized valve of operating room unit is operated to obtain the target SC.

  • Page 174: Heat Exchanger Isothermal Control In Heating Operation

    Si18-201 System control 3.32 Heat Exchanger Isothermal Control in Heating Operation Purpose of the This function ensures appropriate refrigerant distribution when room units are operating in the heating mode. Function It prevents abnormal increase of the high pressure and operation with gas shortage due to uneven refrigerant distribution (Protection function).

  • Page 175: Bp Unit Motorized Valve Control In High Discharge Pipe Temperature

    System control Si18-201 3.33 BP Unit Motorized Valve Control in High Discharge Pipe Temperature When the discharge pipe temperature exceeds a certain level during compressor operation, this function opens the motorized valve to return the refrigerant to a low pressure level in order to cool the compressor with refrigerant and lower the discharge temperature.

  • Page 176: Inter-Bp Units Heating Heat Exchanger Isothermal Control

    Si18-201 System control 3.34 Inter-BP Units Heating Heat Exchanger Isothermal Control Purpose of the This function ensures appropriate refrigerant distribution to each BP unit in heating operation. Function It prevents abnormal increase of the high pressure and operation with gas shortage due to uneven refrigerant distribution (Protection function).

  • Page 177: Inter-Bp Units Gas Pipe Isothermal Control

    System control Si18-201 3.35 Inter-BP Units Gas Pipe Isothermal Control Purpose of the This function ensures appropriate refrigerant distribution to each BP unit when many room units are operating in the cooling mode. Function Outline The gas pipe temperatures of operating room units are detected by the gas pipe thermistors, and the opening degrees of the motorized valves are corrected so as to equalize the gas pipe temperatures of the room units.

  • Page 178: Bp Unit Motorized Valve Control By Target Discharge Pipe Temperature

    Si18-201 System control 3.36 BP Unit Motorized Valve Control by Target Discharge Pipe Temperature Purpose of the This function uses the discharge pipe temperature to provide indirect SH control. It also enables Function the management of the discharge temperature and wet operation (control in wet zone). Outline The target discharge pipe temperature is obtained based on the indoor heat exchanger temperature and outdoor heat exchanger temperature, the motorized valves' flow rates are...

  • Page 179: 4-Way Valve Operation

    System control Si18-201 3.37 4-Way Valve Operation 3.37.1 4-Way Valve Operation Security Purpose of the This function ensures proper operation of the 4-way valve. (Because the pilot-system drive method is used, the current from the coil cannot provide fail-proof 4-way valve operation. Function Therefore, the difference of pressure before and after the valve is used to ensure proper valve operation.)

  • Page 180: Jis Mode

    Si18-201 System control 3.38 JIS Mode Purpose of the This aims to minimize capacity deviations at the time the JIS mode is determined. Function Outline When the JIS mode is determined, the function fixes the operating frequency (command frequency), target discharge temperature and target SC.

  • Page 181: Pump Down Operation

    System control Si18-201 3.39 Pump Down Operation Outline When the Pump-down button is pressed, the following control is provided to collect refrigerant in the receiver. Details 4-way valve 45Hz 30 Hz Command frequency 775rpm Outdoor unit upper fan 715rpm Outdoor unit lower fan 450 pulses 450 pulses 0 pulse...

  • Page 182: Protection Control Of Skyair Indoor Units

    Si18-201 System control 3.40 Protection Control of SkyAir Indoor Units SkyAir Indoor The zones for SkyAir indoor unit peak-cut control is produced in the BP unit. Unit Peak-Cut Peak-cut control Zone Based on the heat exchanger temperature information sent from the indoor unit, the zones are produced to prevent abnormal rise of the high pressure.
  • Page 183 System control Si18-201 Monitoring In the case of SkyAir indoor units, the fan operates at the L tap during heating thermostat OFF. Therefore, the refrigerant continues to flow into the indoor heat exchanger. This can cause Function During condensation, causing liquid trap. SkyAir Indoor To prevent this, the BP unit sends a defrost signal (FD+FDS) to turn off the fan.

  • Page 184: Part 6 Flow Of Refrigerant

    Si18-201 Part 6 Part 6 Part 6 Part 6 Flow of Refrigerant Flow of Refrigerant Flow of Refrigerant Flow of Refrigerant 1. Flow of Refrigerant................172 1.1 Flow of Refrigerant ................172 1.2 Standby Operation (Cooling)..............173 1.3 Equalizing Control (Cooling)..............174 1.4 Oil Return Operation (Cooling).............175 1.5 Low Outside Air Temperature Cooling ..........176 1.6 All-Room Operation (Cooling) ..............177 1.7 Multi-Room Operation (No Surplus Refrigerant) (Cooling)....178...

  • Page 185: Flow Of Refrigerant

    Flow of Refrigerant Si18-201 1. Flow of Refrigerant Flow of Refrigerant Operating Status 4-way valve EVA,B,C- EVA,B,C- Non- EVH BP Unit $ : Fixed opening (step) Discharge Outdoor Unit Outdoor Unit Operating Room Operating Room Bypass % : Variable opening Bypass Gas Pipe Liquid Pipe...

  • Page 186: Standby Operation (Cooling)

    Si18-201 Flow of Refrigerant Standby Operation (Cooling) Flow of Refrigerant...

  • Page 187: Equalizing Control (Cooling)

    Flow of Refrigerant Si18-201 Equalizing Control (Cooling) Flow of Refrigerant...

  • Page 188: Oil Return Operation (Cooling)

    Si18-201 Flow of Refrigerant Oil Return Operation (Cooling) Flow of Refrigerant...

  • Page 189: Low Outside Air Temperature Cooling

    Flow of Refrigerant Si18-201 Low Outside Air Temperature Cooling Flow of Refrigerant...

  • Page 190: All-Room Operation (Cooling)

    Si18-201 Flow of Refrigerant All-Room Operation (Cooling) Flow of Refrigerant...

  • Page 191: Multi-Room Operation (No Surplus Refrigerant) (Cooling)

    Flow of Refrigerant Si18-201 Multi-Room Operation (No Surplus Refrigerant) (Cooling) Flow of Refrigerant...

  • Page 192: Multi-Room Operation (Cooling) (With Surplus Refrigerant)

    Si18-201 Flow of Refrigerant Multi-Room Operation (Cooling) (with Surplus Refrigerant) Flow of Refrigerant...

  • Page 193: 1-Room Operation - Indoor Unit With Large Capacity (Cooling)

    Flow of Refrigerant Si18-201 1-Room Operation — Indoor Unit with Large Capacity (Cooling) Flow of Refrigerant...

  • Page 194: 1-Room Operation - Indoor Unit With Small Capacity (2.5 Kw) (Cooling)

    Si18-201 Flow of Refrigerant 1.10 1-Room Operation — Indoor Unit with Small Capacity (2.5 kW) (Cooling) Flow of Refrigerant...

  • Page 195: Standby Operation (Heating)

    Flow of Refrigerant Si18-201 1.11 Standby Operation (Heating) Flow of Refrigerant...

  • Page 196: Equalizing Control (Heating)

    Si18-201 Flow of Refrigerant 1.12 Equalizing Control (Heating) Flow of Refrigerant...

  • Page 197: Oil Return Operation (Heating)

    Flow of Refrigerant Si18-201 1.13 Oil Return Operation (Heating) Flow of Refrigerant...

  • Page 198: 1.14 Defrost Operation

    Si18-201 Flow of Refrigerant 1.14 Defrost Operation Flow of Refrigerant...

  • Page 199: All-Room Operation (Heating)

    Flow of Refrigerant Si18-201 1.15 All-Room Operation (Heating) Flow of Refrigerant...

  • Page 200: Multi-Room Operation (With Non-Operating Room Unit) (Heating)

    Si18-201 Flow of Refrigerant 1.16 Multi-Room Operation (with non-Operating Room Unit) (Heating) Flow of Refrigerant...

  • Page 201: Multi-Room Operation (Heating)

    Flow of Refrigerant Si18-201 1.17 Multi-Room Operation (Heating) Flow of Refrigerant...

  • Page 202: 1-Room Operation - Indoor Unit With Large Capacity (Heating)

    Si18-201 Flow of Refrigerant 1.18 1-Room Operation — Indoor Unit with Large Capacity (Heating) Flow of Refrigerant...

  • Page 203: 1-Room Operation - Indoor Unit With Small Capacity (2.5 Kw) (Heating)

    Flow of Refrigerant Si18-201 1.19 1-Room Operation — Indoor Unit with Small Capacity (2.5 kW) (Heating) Flow of Refrigerant...

  • Page 204: Part 7 Operations

    Si18-201 Part 7 Part 7 Part 7 Part 7 Operations Operations Operations Operations 1. Remote Controller ................192 1.1 Wireless Remote Controller ..............192 1.2 Wired Remote Controller..............202 The RMK140JAVM specifications are special. Refer to <RMK140JAVM's important points> (on page ii) for the changes in contents. Operations...

  • Page 205: Remote Controller

    Remote Controller Si18-201 1. Remote Controller Wireless Remote Controller 1.1.1 FTK, FTX25 / 35J Display Transmitter It displays the It sends signals to the indoor unit. Open current settings. (In this illustration, cover. each section is shown with all its displays ON for the purpose of explanation.
  • Page 206 Si18-201 Remote Controller 1.1.2 FVX25 / 35KZ Operations...
  • Page 207 Remote Controller Si18-201 1.1.3 FTXD25 / 35KZ Operations...
  • Page 208 Si18-201 Remote Controller 1.1.4 FTK, FTX50 / 60H Operations...
  • Page 209 Remote Controller Si18-201 1.1.5 FTKD, FTXD50 / 60 / 71J Operations...
  • Page 210 Si18-201 Remote Controller 1.1.6 FLK, FLX50 / 60J Open cover. Transmitter It sends signals to the indoor unit. Display TEMPERATURE It displays the current settings. adjustment button (In this illustration, each section is shown with all its It changes the temperature displays ON for the purpose of setting.
  • Page 211 Remote Controller Si18-201 1.1.7 CDK25 / 35 / 50 / 60HA, CDX25 / 35 / 50 / 60J Display Transmitter It displays the It sends signals to the indoor unit. Open current settings. (In this illustration, cover. each section is shown with all its displays ON for the purpose of...
  • Page 212 Si18-201 Remote Controller 1.1.8 FLK, FLX25 / 35 / 50 / 60H Display Transmitter It displays the It sends signals to the indoor unit. Open current settings. (In this illustration, cover. each section is shown with all its displays ON for the purpose of explanation.
  • Page 213 Remote Controller Si18-201 1.1.9 FHYC35 / 50 / 60 / 71K (Optional Accessory) BRC7C612WC Operations...

  • Page 214: Si18

    Si18-201 Remote Controller Operations...

  • Page 215: Wired Remote Controller

    Remote Controller Si18-201 Wired Remote Controller 1.2.1 FHYC35 / 50 / 60 / 71K (Optional Accessory) BRC1B61 REMOTE CONTROLLER 1.2.2 FDYM60 / 03F (Standard Accessory) BRC1B62 REMOTE CONTROLLER Operations...
  • Page 216 Si18-201 Remote Controller Operations...
  • Page 217 Remote Controller Si18-201 Operations...

  • Page 218: Part 8 Operating Test

    Si18-201 Part 8 Part 8 Part 8 Part 8 Operating Test Operating Test Operating Test Operating Test 1. Operating Test ..................206 1.1 Operating Test..................206 1.2 Test Operation Switch ................209 1.3 Pump Down Operation Switch .............210 1.4 Record of the Installation Position............211 2.

  • Page 219: Operating Test

    Operating Test Si18-201 1. Operating Test Operating Test OPERATING TEST Before performing a trial operation *Check the connection status. Be sure to carry out initial settings. Check Flow When the power is first turned on, the LEDs 2 - 4 on the service monitor P-panel light up to indicate “888”.
  • Page 220 Si18-201 Operating Test “ ” : BP unit unconnected, or transmission failure between outdoor units and BP unit “Numeral value” : The number of indoor units connected to each BP unit Flash Normal Transmission failure The indoor units for 2 rooms are connected to BP3, but the display indicates *ex.) : Connect indoor units (2 rooms) to BP1.
  • Page 221 Operating Test Si18-201 1. Record the installation location of each BP unit in the centralized name plate attached to the front panel (2) of the indoor unit. ↓ 2. Open the liquid/gas closing valves. ↓ 3. Check for improper wiring and piping. With a remote controller, start the cooling operation in one single room only.

  • Page 222: Test Operation Switch

    Si18-201 Operating Test Test Operation Switch TEST OPERATION SWITCH [SW7] Digital display: Press the FORCED OPERATION SWITCH [SW7] " " Aftrer sellecting the COOL/HEAT SWITCH [SW3] <CAUTIONS> Blinking 1) Test operation stops automatically in about 60 minutes 2) Cooling test operation cannot be performed if the outside air temperature is –5˚C or lower 3) Operate SkyAir indoor unit in the same mode.

  • Page 223: Pump Down Operation Switch

    Operating Test Si18-201 Pump Down Operation Switch 1. Close the liquid side stop valve of outdoor unit. 2. Pump down PUMP DOWN OPERATION SWITCH [SW4] Digital display: Press the PUMP DOWN OPERATION SWITCH [SW4] " " PUMP DOWN OPERATION STOPS when LP (Low Pressure) After "Pd_"...

  • Page 224: Record Of The Installation Position

    Si18-201 Operating Test Record of the Installation Position Be sure to enter the system unit installation position. SYSTEM LAYOUT BP unit model FOR 3 rooms : BPMK928A43 FOR 2 rooms : BPMK928A42 Do not connect more than 7 indoor units together. Choose the BP unit type (2 rooms or 3 rooms) according to the installation pattern.

  • Page 225: Method Of Field Set

    Method of Field Set Si18-201 2. Method of Field Set Field Setting Wired Remote Controller Notes: (Field setting must be made from the remote controller in accordance with the installation conditions.) " Setting can be made by changing the “Mode number”, “FIRST CODE NO.”, and “SECOND CODE NO.”.

  • Page 226: Initial Setting Contents

    Si18-201 Method of Field Set Wireless Remote Controller Note: If optional accessories are mounted on the indoor unit, the indoor unit setting may have to be changed. Refer to the instruction manual (optional hand book) for each optional accessory. Procedure 1.
  • Page 227 Method of Field Set Si18-201 2.1.2 Local Setting Mode No. Example To set the filter sign time to “filter contamination - heavy” for all units in a group: Set mode No. to “10,” setting switch No. to “0,” and setting position No. to “02.” Table Mode Setting...

  • Page 228: Detailed Explanation Of Setting Modes

    Si18-201 Method of Field Set 3. When installing Sky Air simultaneous operation multi-unit, set to either “twin” or “triple.” Only when the factory setting is changed, it is necessary to make a setting using a remote controller. 4. For further details, see the installation instruction. 5.
  • Page 229 Method of Field Set Si18-201 Wireless Setting (Address and MAIN/SUB Setting) Explanation If several wireless remote controller units are used together in the same room (including the case where both group control and individual remote controller control are used together), be sure to set the addresses for the receiver and wireless remote controller.
  • Page 230 Si18-201 Method of Field Set Setting the <Setting from the remote controller> 1. Hold down the “ “ button and the “ “ button for at least 4 seconds, to get Address of the FIELD SET MODE. (Indicated in the display area in the figure at right). Wireless Remote 2.
  • Page 231 Method of Field Set Si18-201 After Setting Stick the Unit No. label at decoration panel air discharge outlet as well as on the back of the wireless remote controller. PRECAUTIONS Set the Unit No. of the receiver and the wireless remote controller to be equal. If the setting differs, the signal from the remote controller cannot be transmitted.
  • Page 232 Si18-201 Method of Field Set Fan Speed Changeover when Thermostat is OFF By setting to “Set Fan Speed,” you can switch the fan speed to the set fan speed when the heating thermostat is OFF. ∗ Since there is concern about draft if using “fan speed up when thermostat is OFF,” you should take the setup location into consideration.

  • Page 233: Group Number Setting For Central Remote Control

    Method of Field Set Si18-201 Group Number Setting for Central Remote Control " When controlled by a central remote controller and an unified ON/OFF controller, the group number setting in each group is required. " Carry out the setting after the central remote controller, the unified ON/OFF controller, and the indoor units are powered on.

  • Page 234: Interface Adaptor For Room Airconditioner

    Si18-201 Method of Field Set Interface Adaptor for Room Airconditioner <KRP928A1S> Operating Test...
  • Page 235 Method of Field Set Si18-201 Note: Setting of Centralized Controller <DCS301B61, DCS302B61, KRC72> Please refer to Operating Installations of each controllers. Operating Test...

  • Page 236: Precautions: For Rmk140J / Rmx140J Outdoor Unit Users

    Si18-201 Method of Field Set Precautions: For RMK140J / RMX140J Outdoor Unit Users Applicable model series * If you use the indoor unit listed below, and have it connected to the multi-type outdoor unit (RMK140J/RMX140J), be sure to read this precautions. * Use the furnished remote controller.
  • Page 237 Method of Field Set Si18-201 Operating Test...

  • Page 238: Part 9 Service Diagnosis

    Si18-201 Part 9 Part 9 Part 9 Part 9 Service Diagnosis Service Diagnosis Service Diagnosis Service Diagnosis 1. Troubleshooting - Split Type Indoor Unit..........226 1.1 Troubleshooting with the Operation Lamp ...........226 1.2 Service Check Function ...............228 1.3 Code Indication on the Remote Controller ...........230 1.4 Troubleshooting..................231 1.5 Troubleshooting Detail .................232 2.

  • Page 239: Troubleshooting - Split Type Indoor Unit

    Troubleshooting - Split Type Indoor Unit Si18-201 1. Troubleshooting - Split Type Indoor Unit 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 240 Si18-201 Troubleshooting - Split Type Indoor Unit Troubleshooting with the LED Indication Indoor Unit (For example, FTK50/60H Series, FTX50/60H Series) There are green and red LEDs on the PCB. The flashing green LED indicates normal equipment condition, and the OFF condition of the red LED indicates normal equipment condition. (Troubleshooting with the green LED) Even after the error is cancelled and the equipment operates in normal condition, the LED indication remains.

  • Page 241: Service Check Function

    Troubleshooting - Split Type Indoor Unit Si18-201 Service Check Function 1.2.1 ARC423 Series (FTK(X)25/35J Series) In the ARC423A 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 242 Si18-201 Troubleshooting - Split Type Indoor Unit 1.2.2 ARC417 Series (FTK(X)50/60H Series) In the ARC417A 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 243: Code Indication On The Remote Controller

    Troubleshooting - Split Type Indoor Unit Si18-201 Code Indication on the Remote Controller 1.3.1 Error Codes and Description of Fault Code Description of Problem Indication System Normal Insufficient gas Power factor module abnormality Signal transmission error (between indoor and outdoor units) Signal transmission error (between indoor unit and remote controller) Indoor Unit Faulty indoor unit PCB...

  • Page 244: Troubleshooting

    Si18-201 Troubleshooting - Split Type Indoor Unit Troubleshooting 1.4.1 Indoor Units FTK(X)25/35 J - : Not used for troubleshooting ∗ : Varies depending on the cases. Series Indication on the Description of the Fault Details of fault remote (Refer to the controller indicated page.)

  • Page 245: Troubleshooting Detail

    Troubleshooting - Split Type Indoor Unit Si18-201 Troubleshooting Detail 1.5.1 Faulty PCB Remote Controller Display Indoor Unit LED 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 "...
  • Page 246 Si18-201 Troubleshooting - Split Type Indoor Unit 1.5.2 Operation Halt Due to the Freeze Protection Function Remote Controller Display Indoor Unit LED Display Note: No LED Display on FTK(X)25/35J Series. " Method of High pressure control During heating operations, the temperature detected by the indoor heat exchanger Malfunction thermistor is used for the high pressure control (stop, outdoor fan stop, etc.) Detection...
  • Page 247 Troubleshooting - Split Type Indoor Unit Si18-201 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.8 Check the air passage. Refer to P.305 Is there any Provide sufficient air short-circuit? passage.
  • Page 248 Si18-201 Troubleshooting - Split Type Indoor Unit 1.5.3 Operation Halt Due to Fan Motor (AC Motor) or Related Abnormality Remote Controller Display Indoor Unit LED Display Note: No LED Display on FTK(X)25/35J Series. Method of The rotation speed detected by the hall IC during fan motor operation is used to determine abnormal fan motor operation.
  • Page 249 Troubleshooting - Split Type Indoor Unit Si18-201 1.5.4 Operation Halt Due to Detection of Thermistor or Related Abnormality C4, C5, C9, Remote Controller Display Indoor Unit LED Display Note: No LED Display on FTK(X)25/35J Series. Method of The temperatures detected by the thermistors are used to determine thermistor errors. Malfunction Detection Malfunction...
  • Page 250 Si18-201 Troubleshooting - Split Type Indoor Unit 1.5.5 Faulty Indoor Unit PCB ∗ Remote Controller Display B ∗ Indoor Unit LED Display Note: No LED Display on FTK(X)25/35J Series. Method of The proper program operation of the microcomputer is checked by the program. Malfunction Detection Malfunction...
  • Page 251 Troubleshooting - Split Type Indoor Unit Si18-201 1.5.6 Faulty Indoor Unit PCB ∗ Remote Controller Display Indoor Unit LED Display Note: No LED Display on FTK(X)25/35J Series. Method of The condition of the transmission circuit for indoor-outdoor signal transmission is detected. Malfunction Detection Malfunction...
  • Page 252 Si18-201 Troubleshooting - Split Type Indoor Unit 1.5.7 Faulty Power Supply or Indoor Unit PCB (For FTK(X)25/35J) ∗ Remote Controller Display Indoor Unit LED Display Method of 1. The proper program operation of the microcomputer is checked by the program. 2.
  • Page 253 Troubleshooting - Split Type Indoor Unit Si18-201 1.5.8 Faulty Power Supply or Indoor Unit PCB (For FTK(X)50/60H, CDK(X)25~60H) ∗ Remote Controller Display B ∗ Indoor Unit LED Display Note: No LED Display on FTK(X)25/35J Series. Method of The proper program operation of the microcomputer is checked by the program. Malfunction Detection Malfunction...
  • Page 254 Si18-201 Troubleshooting - Split Type Indoor Unit Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check the supply voltage. Does the power Check the power supply, and supply have the rated correct it if not proper.
  • Page 255 Troubleshooting - Split Type Indoor Unit Si18-201 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.16 Refer to P.309 Turn on the power again. Does the same LED indication appear again? Check the voltage of the...
  • Page 256 Si18-201 Troubleshooting - Split Type Indoor Unit 1.5.9 Signal Transmission Error (Between Indoor and Outdoor Units) Remote Controller Display Indoor Unit LED Display Note: No LED Display on FTK(X)25/35J Series. Method of The data received from the outdoor unit in indoor unit-outdoor unit signal transmission is checked whether it is normal.
  • Page 257 Troubleshooting - Split Type Indoor Unit Si18-201 1.5.10 Signal Transmission Error (Between Indoor Unit and Remote Controller) Remote Controller Display Indoor Unit LED Display Note: No LED Display on FTK(X)25/35 J Series. Method of The data received from the indoor unit in indoor unit-remote controller signal transmission is checked whether it is normal.
  • Page 258 Si18-201 Troubleshooting - Split Type Indoor Unit Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check the outdoor unit's LED A. ON or OFF To the section on outdoor Outdoor unit's LED A unit diagnosis Flashing...

  • Page 259: Troubleshooting - Skyair Indoor Unit

    Troubleshooting - SkyAir Indoor Unit Si18-201 2. Troubleshooting - SkyAir Indoor Unit The INSPECTION/TEST Button Explanation By turning the remote controller’s inspection /test button ON, you can change the mode as shown in the figure on the right. " When in the inspection mode, malfunction contents can be cleared by continuing to press the ON/OFF button for 5 seconds.

  • Page 260: Self-Diagnosis By Wired Remote Controller

    Si18-201 Troubleshooting - SkyAir Indoor Unit Self-Diagnosis by Wired Remote Controller Explanation If operation stops due to malfunction, the remote controller’s operation LED blinks, and malfunction code is displayed. (Even if stop operation is carried out, malfunction contents are displayed when the inspection mode is entered.) The malfunction code enables you to tell what kind of malfunction caused operation to stop.

  • Page 261: Fault Diagnosis By Wireless Remote Controller

    Troubleshooting - SkyAir Indoor Unit Si18-201 Fault Diagnosis by Wireless Remote Controller If equipment stops due to a malfunction, the operation indicating LED on the light reception section flashes. The malfunction code can be determined by following the procedure described below. (The malfunction code is displayed when an operation error has occurred.
  • Page 262 Si18-201 Troubleshooting - SkyAir Indoor Unit Service Diagnosis...

  • Page 263: Troubleshooting By Led On The Indoor Unit's

    Troubleshooting - SkyAir Indoor Unit Si18-201 Troubleshooting by LED on the Indoor Unit’s Foreword Troubleshooting can be carried out by service monitor LED (green). (Blinks when normal) : LED on : LED off : LED blinks — : No connection with troubleshooting Microcomputer Transmission Contents/Processing...

  • Page 264: Troubleshooting By Remote Controller Display / Led Display

    Si18-201 Troubleshooting - SkyAir Indoor Unit Troubleshooting by Remote Controller Display / LED Display 2.5.1 Explanation for Symbols : Blinks : On : Off — : No connection with troubleshooting : High probability of malfunction : Possibility of malfunction : Low probability of malfunction —...

  • Page 265: Troubleshooting Detail

    Troubleshooting - SkyAir Indoor Unit Si18-201 Troubleshooting Detail 2.6.1 Failure of Indoor Unit PC Board Remote Controller Display Indoor Unit LED Refer to p.251 Display Applicable All indoor unit models Models Method of Check data from E²PROM. Malfunction Detection Malfunction When data could not be correctly received from the E²PROM Decision E²PROM : Type of nonvolatile memory.
  • Page 266 Si18-201 Troubleshooting - SkyAir Indoor Unit 2.6.2 Malfunction of Drain Water Level System (Float Type) Remote Controller Display Applicable FHYC Models Method of By float switch OFF detection Malfunction Detection Malfunction When rise of water level is not a condition and the float switch goes OFF. Decision Conditions "...
  • Page 267 Troubleshooting - SkyAir Indoor Unit Si18-201 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. If “A3” is detected by a PC board which is not mounted with X15A, Corner or built-in type? the PC board is defective.

  • Page 268: Indoor Unit Fan Motor Lock

    Si18-201 Troubleshooting - SkyAir Indoor Unit 2.6.3 Indoor Unit Fan Motor Lock Remote Controller Display Applicable FHYC Models Method of Detection by failure of signal for detecting number of turns to come from the fan motor Malfunction Detection Malfunction When number of turns can’t be detected even when output voltage to the fan is maximum Decision Conditions "...
  • Page 269 Troubleshooting - SkyAir Indoor Unit Si18-201 2.6.4 Swing Flap Motor Malfunction / Lock Remote Controller Display Applicable FHYC Models Method of Utilizes ON/OFF of the limit switch when the motor turns. Malfunction Detection Malfunction When ON/OFF of the microswitch for positioning cannot be reversed even though the swing flap motor is energized for a specified amount of time (about 30 seconds).
  • Page 270 Si18-201 Troubleshooting - SkyAir Indoor Unit 2.6.5 Failure of Capacity Setting Remote Controller Display Applicable FHYC Models Method of Capacity is determined according to resistance of the capacity setting adaptor and the memory inside the IC memory on the indoor unit PC board, and whether the value is normal or abnormal Malfunction is determined.
  • Page 271 Troubleshooting - SkyAir Indoor Unit Si18-201 2.6.6 Malfunction of Heat Exchange Temperature Sensor System Remote Controller Display Applicable All indoor unit models Models Method of Malfunction detection is carried out by temperature detected by heat exchanger sensor. Malfunction Detection Malfunction When the heat exchanger thermistor becomes disconnected or short-circuited while the unit is running.
  • Page 272 Si18-201 Troubleshooting - SkyAir Indoor Unit 2.6.7 Malfunction of Suction Air Temperature Sensor System Remote Controller Display Applicable AII indoor unit models Models Method of Malfunction detection is carried out by temperature detected by suction air temperature sensor. Malfunction Detection Malfunction When the suction air temperature sensor’s thermistor becomes disconnected or short-circuited while the unit is running.

  • Page 273: Troubleshooting - Outdoor Unit Related

    Troubleshooting - Outdoor Unit Related Si18-201 3. Troubleshooting - Outdoor Unit Related The Unit Runs but Doesn’t Cool (Heat) the Room " Supposed Incorrect temperature setting " Unconnectable models Causes " Clogged air filter " Improper load for the capacity "...
  • Page 274 Si18-201 Troubleshooting - Outdoor Unit Related Troubleshooting Cooling What operation mode is applied? Heating Is stop valve open? Open the stop valve. the heat exchanger intermediate temperature and the liquid pipe temperature in There is possibility of EVn the room with unit run excessively close to the saturated malfunction.

  • Page 275: Seg. Display On The Outdoor P. C. Board

    Troubleshooting - Outdoor Unit Related Si18-201 7 Seg. Display on the Outdoor P. C. Board Switch Box TROUBLE DAIGNOSIS < > 7 seg. display LED ON OUTDOOR UNIT PCB L E D D I S P L A Y [ ON ] OR [ OFF ] OR [ Blinking [ GREEN ]...

  • Page 276: Troubleshooting Detail

    Si18-201 Troubleshooting - Outdoor Unit Related Troubleshooting Detail 3.3.1 High Pressure Malfunction Outdoor Unit Indication Method of Continuity of the high pressure switch is detected by the safety device circuitry. Malfunction Detection Malfunction When HPS malfunction is generated 4 times, the system shuts down. Decision (The 4-time counter resets itself when no outdoor unit abnormality occurs within 60-minute Conditions...

  • Page 277: Compressor Lock

    Troubleshooting - Outdoor Unit Related Si18-201 3.3.2 Compressor Lock Outdoor Unit Indication Method of Detection by the position signal waveform when starting the compressor. Malfunction Detection Malfunction When the position detected signal coincides with the lock pattern at time of starting the compressor.
  • Page 278 Si18-201 Troubleshooting - Outdoor Unit Related 3.3.3 Fan Lock / Overcurrent Outdoor Unit Indication Method of Fan lock is detected using the voltage signal given to the fan and number of turns of the fan motor. Malfunction Detection Overcurrent is detected by the signal from driver. Malfunction When the fan ran with 30rpm or less continuously for 6 seconds in the waveform output Decision...
  • Page 279 Troubleshooting - Outdoor Unit Related Si18-201 3.3.4 Operation Halt Due to Detection of INV Input Current Error Outdoor Unit Indication Method of INV input current error is detected using INV input current detected by CT. Malfunction Detection Malfunction When the inverter input current of 28A or more continued for 2.5 seconds. Decision "...
  • Page 280 Si18-201 Troubleshooting - Outdoor Unit Related 3.3.5 Malfunction of Electronic Expansion Valve Outdoor Unit Indication Method of Detection by checking continuity and lack of connector. Malfunction Detection Malfunction Malfunction is determined by no common voltage applied when turning the power supply on. Decision Conditions "...
  • Page 281 Troubleshooting - Outdoor Unit Related Si18-201 3.3.6 Operation Halt Due to Discharge Pipe Temperature Control Outdoor Unit Indication Method of Discharge pipe temperature control (halt, frequency deviation, etc.) is carried out using temperature detected by the discharge pipe thermistor. Malfunction Detection "...
  • Page 282 Si18-201 Troubleshooting - Outdoor Unit Related 3.3.7 LP Drop Error Outdoor Unit Indication Method of When the value of LP sensor was kept at lower level for a certain time range after the certain time range passed since the compressor started. Malfunction Detection Malfunction...
  • Page 283 Troubleshooting - Outdoor Unit Related Si18-201 3.3.8 Malfunction of High Pressure Switch System Outdoor Unit Indication Method of Continuity of high pressure switch is detected by the safety device circuitry. Malfunction Detection Malfunction When the compressor is off, and the high pressure switch doesn't have continuity. Decision Conditions "...
  • Page 284 Si18-201 Troubleshooting - Outdoor Unit Related 3.3.9 Operation Halt Due to Faulty Position Detection Sensor Outdoor Unit Indication Method of Faulty start of the compressor is detected by checking the turning information of the compressor via position detector of electrical parts. Malfunction Detection Malfunction...
  • Page 285 Troubleshooting - Outdoor Unit Related Si18-201 3.3.10 Fan Position Detection Error Outdoor Unit Indication Method of Fan malfunction is detected by checking 3 numbers motor position detection signal. Malfunction Detection Malfunction When the same state with 3 numbers motor position detection signal was kept for 5 seconds. Decision "...
  • Page 286 Si18-201 Troubleshooting - Outdoor Unit Related 3.3.11 Operation Halt Due to Detection of CT Error Outdoor Unit Indication Method of CT errors are detected using the compressor’s operating frequency and the input current detected by the CT. Malfunction Detection Malfunction When the compressor’s rotating speed is 64rps or more and the CT input is 2 A or less.
  • Page 287 Troubleshooting - Outdoor Unit Related Si18-201 3.3.12 Faulty Outside Air Thermistor Outdoor Unit Indication Method of Malfunction Detection Malfunction When the outside air temperature sensor became short-circuited or open. Decision Conditions " Supposed Faulty outside air temperature sensor " Faulty connectors connection of outside air temperature sensor Causes Troubleshooting Be sure to turn off power switch before connect or disconnect connector,...
  • Page 288 Si18-201 Troubleshooting - Outdoor Unit Related 3.3.13 Faulty Discharge Thermistor Outdoor Unit Indication Method of Malfunction Detection Malfunction When the discharge temperature sensor became short-circuited or open. Decision Conditions " Supposed Faulty discharge temperature sensor " Faulty connectors connection of discharge temperature sensor Causes Troubleshooting Be sure to turn off power switch before connect or disconnect connector,...
  • Page 289 Troubleshooting - Outdoor Unit Related Si18-201 3.3.14 Faulty of Suction Thermistor Outdoor Unit Indication Method of Malfunction Detection Malfunction When the suction temperature sensor became short-circuited or open. Decision Conditions " Supposed Faulty suction temperature sensor " Faulty connectors connection of suction temperature sensor Causes Troubleshooting Be sure to turn off power switch before connect or disconnect connector,...
  • Page 290 Si18-201 Troubleshooting - Outdoor Unit Related 3.3.15 Faulty heat exchanger thermistor Outdoor Unit Indication Method of Malfunction Detection Malfunction When the heat exchanger temperature sensor became short-circuited or open. Decision Conditions " Supposed Faulty heat exchanger temperature sensor " Faulty connectors connection of heat exchanger temperature sensor Causes Troubleshooting Be sure to turn off power switch before connect or disconnect connector,...
  • Page 291 Troubleshooting - Outdoor Unit Related Si18-201 3.3.16 Faulty of Liquid Pipe Thermistor Outdoor Unit Indication Method of Malfunction Detection Malfunction When the liquid pipe temperature sensor became short-circuited or open. Decision Conditions " Supposed Faulty liquid pipe temperature sensor " Faulty connectors connection of liquid pipe temperature sensor Causes Troubleshooting...
  • Page 292 Si18-201 Troubleshooting - Outdoor Unit Related 3.3.17 Faulty BP Liquid Pipe Thermistor Outdoor Unit Indication Method of Malfunction Detection Malfunction When the BP liquid pipe temperature sensor became short-circuited or open. Decision Conditions " Supposed Faulty BP liquid pipe temperature sensor "...
  • Page 293 Troubleshooting - Outdoor Unit Related Si18-201 3.3.18 Faulty BP Gas Pipe Thermistor Outdoor Unit Indication Method of Malfunction Detection Malfunction When the BP gas pipe temperature sensor became short-circuited or open. Decision Conditions " Supposed Faulty BP gas pipe temperature sensor "...
  • Page 294 Si18-201 Troubleshooting - Outdoor Unit Related 3.3.19 Abnormal LP Error Outdoor Unit Indication Method of 1. Error is determined by the LP sensor value when the compressor is off. 2. Error is determined by the LP sensor value in normal operation when the compressor is on. Malfunction 3.
  • Page 295 Troubleshooting - Outdoor Unit Related Si18-201 3.3.20 Rise in BOX Temperature Outdoor Unit Indication Method of Detection of abnormal rise in BOX temperature is carried out by the temperature detected by thermistor. Malfunction Detection Malfunction When the detected BOX temperature came to 85°C or higher Decision "...
  • Page 296 Si18-201 Troubleshooting - Outdoor Unit Related 3.3.21 Abnormal Rise in Fin Temperature Outdoor Unit Indication Method of Detection of abnormal rise in fin temperature is carried out by the detected value of fin temperature. Malfunction Detection Malfunction When fin temperature came to 92°C or higher Decision (The 4-time counter resets itself when no outdoor unit abnormality occurs within 60-minute Conditions...
  • Page 297 Troubleshooting - Outdoor Unit Related Si18-201 3.3.22 Operation Halt Due to Detection of Output Overcurrent Outdoor Unit Indication Method of The output overcurrent is detected using amperage that flows through the DC unit of inverter. Malfunction Detection " Malfunction When the output overcurrent was input into microcomputer from the output overcurrent detection circuitry.
  • Page 298 Si18-201 Troubleshooting - Outdoor Unit Related Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. *Output overcurrent will be generated due to incorrect connection of internal wiring. Check No.1 When the operation is halted due to output overcurrent after connecting/disconnecting Refer to P.300 the wiring for replacement of parts, etc., check the wiring again.
  • Page 299 Troubleshooting - Outdoor Unit Related Si18-201 3.3.23 Integrated Input Current Stop Outdoor Unit Indication Method of Abnormality of integrated input current is detected using integrated input current detected by the Malfunction Detection Malfunction When the integrated input current of 31A. continued for 2.5 seconds Decision "...
  • Page 300 Si18-201 Troubleshooting - Outdoor Unit Related 3.3.24 Electronic Thermal Outdoor Unit Indication Method of Electronic thermal is detected using output amperage and operating status. Malfunction Detection Malfunction When the compressor output current of 40A or higher continued for 260 seconds When the compressor output current of 50A or higher continued for 5 seconds Decision Conditions...
  • Page 301 Troubleshooting - Outdoor Unit Related Si18-201 3.3.25 Stall Prevention Outdoor Unit Indication Method of Stall prevention system error is detected using the compressor's output current. Malfunction Detection Malfunction When the compressor's output current of 33A or higher continued for 0.3 seconds and peak current reached to 65A or higher Decision When the compressor's output current of 33A or higher continued for 5 seconds...
  • Page 302 Si18-201 Troubleshooting - Outdoor Unit Related 3.3.26 Transmission Error between Microcomputers Outdoor Unit Indication Method of Malfunction Detection Malfunction When the transmission error with INV fan microcomputer continues for 60 seconds Decision Conditions " Supposed Faulty fan PC board " Outside causes (noise, etc.) Causes Troubleshooting...
  • Page 303 Troubleshooting - Outdoor Unit Related Si18-201 3.3.27 Overvoltage, Low Voltage Outdoor Unit Indication Method of Power supply system error is detected using the voltage of inverter DC unit. Malfunction Detection Malfunction When, after starting the compressor, the voltage reached to below 210V over 450V before it exceeded 320V, or to below 260V or over 450V after it exceeded 320V once.

  • Page 304: Transmission Error Between Outdoor Unit And Bp Unit

    Si18-201 Troubleshooting - Outdoor Unit Related 3.3.28 Transmission Error between Outdoor Unit and BP Unit Outdoor Unit Indication Method of Transmission error is detected when the data from BP unit could not be correctly received. Malfunction Detection Malfunction When the data from BP unit could not be correctly received continuously for 15 seconds Decision Conditions "...
  • Page 305 Troubleshooting - Outdoor Unit Related Si18-201 Troubleshooting Check No.14 Refer to P.308 Is U4 displayed? Could be outside causes other than errors. Probe where the noise comes from, and apply remedy required. Check No. 14 Check the power supply waveform. Is it deformed? Probe the causes for deformation of power...

  • Page 306: Transmission Error Between Indoor Unit And Bp Unit

    Si18-201 Troubleshooting - Outdoor Unit Related 3.3.29 Transmission Error between Indoor Unit and BP Unit Outdoor Unit Indication Method of Transmission error is detected when BP unit could not correctly receive the data from BP unit to transmit the data incorrectly to outdoor unit. Malfunction Detection Malfunction...
  • Page 307 Troubleshooting - Outdoor Unit Related Si18-201 3.3.30 Transmission Error of DC Fan Outdoor Unit Indication Method of Malfunction Detection Malfunction When transmission error with DC fan microcomputer continued for 60 seconds Decision Conditions " Supposed Incorrect connectors connection " DC fan microcomputer malfunction Causes "...
  • Page 308 Si18-201 Troubleshooting - Outdoor Unit Related 3.3.31 Operation Halt Due to Detection of Gas Shortage Outdoor Unit Indication Method of Detection Method 1 Lack of gas is detected using the input current detected by the CT and the compressor's Malfunction operating frequency.
  • Page 309 Troubleshooting - Outdoor Unit Related Si18-201 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.3 Is each thermister Refer to P.301 Correct connection to a disconnected? certain place. CT Check Check gas for leaking.
  • Page 310 Si18-201 Troubleshooting - Outdoor Unit Related 3.3.32 System Malfunction Outdoor Unit Indication Method of Case where other BP or indoor unit connected with other BP malfunctioned Malfunction This malfunction means that displayed only on indoor unit connected with normal BP. Detection "...
  • Page 311 Troubleshooting - Outdoor Unit Related Si18-201 3.3.33 Faulty BOX Thermistor Malfunction Outdoor Unit Indication Method of Malfunction of BOX temperature thermistor is detected using the temperature detected by the thermistor. Malfunction Detection Malfunction When the detected temperature came to 92°C or higher, or to -30°C or lower Decision "...
  • Page 312 Si18-201 Troubleshooting - Outdoor Unit Related 3.3.34 Faulty Fin Thermistor Outdoor Unit Indication Method of Faulty fin thermistor is detected using the temperature detected by the fin. Malfunction Detection Malfunction When the detected temperature came to 120°C or higher, or to -30°C or lower Decision "...

  • Page 313: How To Check

    Troubleshooting - Outdoor Unit Related Si18-201 How to Check 3.4.1 Installation Condition Check Check No.1 Installation condition check Check the allowable Abnormal Change the position of the dimensions of the air suction and discharge air discharge grille or the area. installation location.
  • Page 314 Si18-201 Troubleshooting - Outdoor Unit Related 3.4.3 Electronic Expansion Valve Check Check No.3 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.

  • Page 315: Service Diagnosis

    Troubleshooting - Outdoor Unit Related Si18-201 3.4.5 Internal Wiring Check (1) Check No.5 Check the wiring at the sections marked by the boxes in the diagram. Check for breaking of wire and wiring errors. In the case of RMX140JVMC POWER SUPPLY PCB2 ~50Hz 220-240V S952...
  • Page 316 Si18-201 Troubleshooting - Outdoor Unit Related 3.4.6 Power Transistor Check (Capacitor Voltage Check) Check No.6 Power Transistor Check " Do not touch the charging unit for 10 minutes after turning the breaker off. " Even when touching the charging unit after 10 minutes, use a multiple meter to ensure that the power supply voltage of power transistor is 50V or less.
  • Page 317 Troubleshooting - Outdoor Unit Related Si18-201 3.4.7 Power Transistor Output Check Check No.7 Measure the output current and voltage of the power transistor. Output Current Remove the front panel, and measure the current in the red, yellow and blue wire harness inside the compressor using a clamp meter.

  • Page 318: Thermistor Resistance Check

    Si18-201 Troubleshooting - Outdoor Unit Related 3.4.8 Thermistor Resistance Check Check No.8 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 319 Troubleshooting - Outdoor Unit Related Si18-201 3.4.9 Inverter Units Refrigerant System Check Check No.9 ∗ Refrigerant system check the discharge thermister disconnected Correct the problem. from the holder? Is any moisture Conduct vacuum drying. found in sight glass. Conduct the check after operating the equipment for a sufficient length of time.
  • Page 320 Si18-201 Troubleshooting - Outdoor Unit Related 3.4.11 Electrolytic Capacitor Capacity Check Check No.11 Make sure that the voltage is not impressed to the electrolytic capacitor. Does the Error capacitor resistance vary at 0Ω? Does the Error capacitor resistance vary at ∞? 3.4.12 Voltage Check when Starting the Compressor Check No.12...

  • Page 321: Power Supply Waveforms Check

    Troubleshooting - Outdoor Unit Related Si18-201 3.4.13 Power Supply Waveforms Check Check No.13 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). "...
  • Page 322 Si18-201 Troubleshooting - Outdoor Unit Related 3.4.15 Inverter Units Hall IC Check Check No.15 1. Check the connector connection. 2. With the power ON, operation OFF, and the connector connected, check the following. ∗ Output voltage of about 5 V between pins 1 and 3. ∗...

  • Page 323: Bp Unit Trouble Diagnosis

    BP Unit Trouble Diagnosis Si18-201 4. BP Unit Trouble Diagnosis PCB Parts Layout LED On Branch Provider Unit (Diagnosis LEDs) Service Diagnosis...

  • Page 324: Part 10 Removal Procedure

    Si18-201 Part 10 Part 10 Part 10 Part 10 Removal Procedure Removal Procedure Removal Procedure Removal Procedure 1. For BPMK928B42 · 43 ................312 1.1 Installation of Indoor Unit..............312 1.2 Opening of Electrical Box Cover and Removal of PCB Mount.....313 1.3 Removal of Motorized Valve ..............315 1.4 Removal of Thermistor .................318 2.

  • Page 325: For Bpmk928B42 · 43

    For BPMK928B42 · 43 Si18-201 For BPMK928B42 · 43 Installation of Indoor Unit Procedure Warning Be sure to turn off all power supplies before disassembling work. Step Procedure Points 1. For ceiling mounting Screw down the accompanying four fixtures in position. "...

  • Page 326: Opening Of Electrical Box Cover And Removal Of Pcb Mount

    Si18-201 For BPMK928B42 · 43 Opening of Electrical Box Cover and Removal of PCB Mount Procedure Warning Be sure to turn off all power supplies before disassembling work. Step Procedure Points 1. Opening the electrical box cover Remove the M5 screw from the electrical box cover.
  • Page 327 For BPMK928B42 · 43 Si18-201 Step Procedure Points " 2. Removing the PCB The PCB is treated for moisture resistance. The codes of the Replace the PCB and its connectors on the PCB mount together, if required. are as shown at right. "...

  • Page 328: Removal Of Motorized Valve

    Si18-201 For BPMK928B42 · 43 Removal of Motorized Valve Procedure Warning Be sure to turn off all power supplies before disassembling work. Step Procedure Points 1. Detaching the bottom panel Loosen the two keyhole-provided screws and remove the two other screws from the electrical mounting plate.
  • Page 329 For BPMK928B42 · 43 Si18-201 Step Procedure Points 4. Dismounting the motorized valve " Before taking this Caution procedure, make sure Be careful not to get yourself there is no refrigerant gas burnt with the motorized valve, left in the refrigerant pipes and other parts that are pipes.
  • Page 330 Si18-201 For BPMK928B42 · 43 Step Procedure Points Heat up the brazed Reassembling precautions sections of the 1. Use non-oxidizing brazing motorized valve. Using method. If nitrogen gas is not pliers or the like, available, braze the parts disconnect the valve. speedily.

  • Page 331: Removal Of Thermistor

    For BPMK928B42 · 43 Si18-201 Removal of Thermistor Procedure Warning Be sure to turn off all power supplies before disassembling work. Step Procedure Points " " Disconnect the thermistor The factory-installed harness connector from thermistors cannot be the PCB. replaced. "...
  • Page 332 Si18-201 For BPMK928B42 · 43 Step Procedure Points " Insert the new Pulling the thermistor thermistor terminal to terminal the thermistor connector. " Align the thermistor terminal with its hole of the connector. " Provide thermal insulation from above. Carefully work on the connector without breaking the hook.

  • Page 333: Outdoor Unit

    Outdoor Unit Si18-201 Outdoor Unit Removal of Outer Panels Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points " Remove the eight The front panel can be screws from the top detached without removing panel.

  • Page 334: Removal Of Pcb And Electrical Box

    Si18-201 Outdoor Unit Removal of PCB and Electrical Box Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points " Detach the top, front and side panels, referring to the instructions in "Removal of Outer Panels".
  • Page 335 Outdoor Unit Si18-201 Step Procedure Points 4. Disconnecting the compressor leads " Handle the sound insulation Undo the noise with enough care. It may insulation fixture string. damage the pipes around. Pull up the noise insulation. Open up the terminal cover noise insulation.
  • Page 336 Si18-201 Outdoor Unit Step Procedure Points 5. Detaching the electrical Remove the screws from the electrical box. Lift the electrical box off the hook at the back, and draw out the box. 6. Disassembling the electrical box " Disconnect all the Make sure to clamp all wire connectors.
  • Page 337 Outdoor Unit Si18-201 Step Procedure Points Disconnect the two relay connectors on the side. Remove the two lock screws from the front section. Slide the front section to the right and release it off the two hooks at the back. Removal Procedure...
  • Page 338 Si18-201 Outdoor Unit Step Procedure Points 7. Detaching the filter PCB The filter PCB is located as shown at right. Disconnect all the connectors and remove the four locking guard spacers. Take out the filter PCB. Remove the four screws and take out the reactors.
  • Page 339 Outdoor Unit Si18-201 Step Procedure Points 8. Detaching the control The control PCB is located as shown at right. The setting and self- diagnostic PCB is located also as shown at right. " The PCB1 and PCB4 are integrally constructed. Disconnect all the connectors.
  • Page 340 Si18-201 Outdoor Unit Step Procedure Points " Remove the five The back of the PCB has locking card spacers silicone compound applied. and detach the control Give a slight force in PCB. detaching the PCB. " Be sure to apply fresh silicone compound before attaching the PCB back in place.
  • Page 341 Outdoor Unit Si18-201 Step Procedure Points 11.Detaching the fan control The fan control PCB is located as shown at right. Remove the four locking card spacers and detach the PCB. Removal Procedure...

  • Page 342: Removal Of Propeller Fans And Fan Motors

    Si18-201 Outdoor Unit Removal of Propeller Fans and Fan Motors Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points " Detach the front panel, front piping cover, etc., referring to the instructions in "Removal of Outer Panels".
  • Page 343 Outdoor Unit Si18-201 Step Procedure Points 2. Dismounting the fan motors Disconnect the two fan motor relay connectors from the PCB in the electrical box. The fan motor leads are hooked in some locations: one hook for the upper fan and two for the lower fan.

  • Page 344: Removal Of Thermistor

    Si18-201 Outdoor Unit Removal of Thermistor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points " Detach the top, front panel (2) and side panel, referring to the instructions in "Removal of Outer Panels".

  • Page 345: Removal Of Motorized Valve

    Outdoor Unit Si18-201 Removal of Motorized Valve 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 Reassembling precautions procedure, make sure 1 Use non-oxidizing brazing there is no refrigerant gas method.
  • Page 346 Si18-201 Outdoor Unit Step Procedure Points Disconnect the earth wire. Warning If refrigerant gas leaks during the job, ventilate the room. (Bear in mind that if the refrigerant gas is exposed to open flames, noxious gas may be generated.) Caution Be careful not to get yourself burnt with the motorized valve, pipes and other parts that are...

  • Page 347: Removal Of Sound Insulation

    Outdoor Unit Si18-201 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 the terminal cover and disconnect the compressor leads, referring to the instructions in "Removal of PCB".
  • Page 348 Si18-201 Outdoor Unit Step Procedure Points Draw out the sound insulation cover from the bottom of the compressor. Undo the two points of the sound insulation fixture string. Open the sound insulation and draw it out. Removal Procedure...

  • Page 349: Removal Of Compressor

    Outdoor Unit Si18-201 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 " Detach the outer panels, electrical box and noise insulation, referring to the instructions in "Removal of Outer Panels"...
  • Page 350 Si18-201 Outdoor Unit Step Procedure Points Remove the three lock nuts from the compressor. " Remove the three lock Reattach the noise insulation bolts from the with no gap using the fixture compressor. string. " This is to easily pull out the heavy compressor Warning...

  • Page 351: Removal Of 4-Way Valve

    Outdoor Unit Si18-201 Removal of 4-way Valve 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 left in the refrigerant pipes.
  • Page 352 Si18-201 Outdoor Unit Step Procedure Points Remove the lock screw from the piping assembly. Disconnect the pipes form the accumulator Warning (at points A and B) The compressor's refrigerating using a welding machine oil may catch fire. machine. Have wet cloth at hand for quickly putting out the fire.
  • Page 353 Outdoor Unit Si18-201 Step Procedure Points Cut off the compressor's discharge pipe (at point L) with the pipe cutter. " Disconnect the 4-way In reconnecting the 4-way valve assembly. valve assembly, braze the cut-off point together with a copper tube union (Local supply).
  • Page 354 Si18-201 Outdoor Unit Step Procedure Points 2. Disconnecting the 4-way valve Remove the screw. Get rid of the brazing at Reassembling precautions points A, B, C and D. 1 Use non-oxidizing brazing Disconnect the 4-way method. If nitrogen gas is not valve assembly.

  • Page 355: Indoor Unit

    Indoor Unit Si18-201 Indoor Unit Refer following table for indoor unit removal procedure Model Number Service Manual Page FTK25 / 35J, FTX25 / 35J, Si12-001 P.176~192 FTXD25 / 35K, FVX25 / 35K FTKD50 / 60 / 71J, FTXD50 / 60 / 71J, Si12-001 P.193~214 FTK50 / 60H, FTX50 / 60H...

  • Page 356: Part 11 Cautions Before Operation

    Si18-201 Part 11 Part 11 Part 11 Part 11 Cautions before Operation Cautions before Operation Cautions before Operation Cautions before Operation 1. Installation ...................344 1.1 Outdoor Unit ..................344 1.2 BP Unit ....................346 2. Wiring ....................348 2.1 Outdoor Unit ..................348 2.2 BP Unit ....................350 2.3 Outdoor Unit Rotary Switch Setting............352 3.

  • Page 357: Installation

    Installation Si18-201 Installation Outdoor Unit INSTALLATION PROCEDURE 1. Carrying-in • Take care not to let your hands and other objects touch the rear fins. WARNING 1. Carry in the equipment slowly, using the grips provided on the sides. Discharge grill (Front) (Back) Do not grab the inlet hole section...
  • Page 358 Si18-201 Installation (C) Where there are obstacles on both suction and discharge sides: Pattern 1 Where the obstacles on the discharge side is higher than the unit: • No obstacle above • Obstacle above, too The relations between H, A and L are as follows: 0 <...

  • Page 359: Bp Unit

    Installation Si18-201 BP Unit INSTALLATION • This unit may be installed suspended from the ceiling or mounted on the wall. • This unit may only be installed vertically, as shown in the diagram below. (Side is facing up.) However, it may be freely installed in any direction forward or back, and to the sides. •...
  • Page 360 Si18-201 Installation INSTALLATION OF THE MAIN UNIT NOTES: • This unit has two different installation types: Printed wiring board Reverse position (1) ceiling-suspended type and (2) wall-mounted type. • Choose the proper installation pattern according to the location of installation. •...

  • Page 361: Wiring

    Wiring Si18-201 Wiring Outdoor Unit ELECTRIC WIRING CONNECTION 1. Connection electric wire treatment ( CAUTION) Following are the precautions for inter-unit wiring and power supply wiring. Be sure to install an earth leakage breaker and safety breaker. • Do not turn ON the safety breaker for the outdoor power supply before all the work is completed. •...
  • Page 362 Si18-201 Wiring 2. BP unit connection priority When connecting to the BP unit, always start the connection with BP1 of the terminal board (at outdoor unit side) in the sequential order. Improper connection will cause a transmission failure, preventing the operation. OUTDOOR UNIT OUTDOOR UNIT OUTDOOR UNIT...

  • Page 363: Bp Unit

    Wiring Si18-201 BP Unit CONNECTING THE WIRING • Connect refrigerant pipes and connection wires to the appropriate ports marked with matching alphabets (A, B, and C) on this unit . • Follow the instructions on the wiring nameplate to connect the connection wires of indoor/outdoor units to terminal board numbers.
  • Page 364 Si18-201 Wiring CAUTIONS: Procedure for changing the installation location • Do not turn ON the power until relocation and of printed wiring board wiring is completed. • When supplying power, it will automatically If the installation location of printed wiring board recognize the vertical orientation of the needs to be changed because of the installation printed wiring board and change the terminal...

  • Page 365: Outdoor Unit Rotary Switch Setting

    Wiring Si18-201 Outdoor Unit Rotary Switch Setting Switch Bo 7 seg. display Setting Position SW1, SW2 Service Monitor (Q0008) * RAM View Monitor RSW1 RSW2 Remarks Unit Latest (status) error code Error code Latest (status) error spot Standard Current run mode Status Current 4-way valve Status...
  • Page 366 Si18-201 Wiring RSW1 RSW2 Remarks Unit Current BP 1 Room-A gas pipe temperature Temp. offset 40h Current BP 1 Room-B gas pipe temperature Temp. offset 40h Current BP 1 Room-C gas pipe temperature Temp. offset 40h Current BP 2 Room-A gas pipe temperature Temp.

  • Page 367: Others

    Others Si18-201 Others Explanation for FTK(X)25/35J Series 3.1.1 Test Run from the Remote Controller (For Heat Pump Model Only) 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 368: Centralized Control

    Si18-201 Others 3.1.2 Method of Operating Air Conditioners Individually (When Two Units are Installed in One Room) For Cooling Only and Heat Pump Model " 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.
  • Page 369 Others Si18-201 3.1.5 Adjusting the Angle of the Intelligent-eye Sensor " Once installation of the indoor unit is complete, adjust the angle of the Intelligent-eye sensor to ensure the detection area properly covers the room. (Adjustable angle : 15° to right and left of center) "...

  • Page 370: Explanation For Ftk(X)50/60H And Cdk(X)25~60H Series

    Si18-201 Others Explanation for FTK(X)50/60H and CDK(X)25~60H Series 3.2.1 Test Run from the Remote Controller (For Heat Pump Model Only) This program is to test the air conditioner independent from the room temperature and the temperature setting (i.e. as the thermostat of the indoor unit is bridged). Carry out the test operation in accordance with the operation manual to ensure that all functions and parts, such as louvre movement, are working properly.
  • Page 371 Others Si18-201 3.2.3 Centralized Control (For KRC72, KRP411A1S and KRP410A11S) For an explanation on usage, see the option handbook. However, do the following when using the KRP410A11S (Contact connection centralized control PC board). Cut jumper JC on the indoor PC Bord. (ML112) Note : The power failure recovery function is controlled by the ON signal from the centralized control...

  • Page 372: Part 12 Appendix

    Si18-201 Part 12 Part 12 Part 12 Part 12 Appendix Appendix Appendix Appendix 1. Piping Diagrams..................360 1.1 Outdoor Units ..................360 1.2 BP Units ....................362 1.3 Indoor Units ..................363 2. Wiring Diagrams..................370 2.1 Outdoor Units ..................370 2.2 BP Units ....................374 2.3 Indoor Units ..................375 The RMK140JAVM specifications are special.

  • Page 373: Piping Diagrams

    Piping Diagrams Si18-201 1. Piping Diagrams Outdoor Units RMK140JVMC9 (8) / RMK140JVMT9 / RMK140JZVMA OUTDOOR UNIT FILTER FIELD ELECTRONIC PIPING LIQUID LINE EXPANSION VALVE ( 9.5 CuT ) STOP VALVE CAPILLARY TUBE FILTER FILTER OUTDOOR TEMPARATURE THERMISTOR ELECTRONIC ( DOA ) EXPANSION VALVE DISTRIBUTOR FILTER...
  • Page 374 Si18-201 Piping Diagrams RMX140JVMC9 (8) / RMX140JVMT9 / RMX140JVMB / RMX140JZVMB OUTDOOR UNIT FILTER FIELD ELECTRONIC PIPING LIQUID LINE ( 9.5 CuT ) EXPANSION VALVE STOP VALVE FILTER FILTER OUTDOOR TEMPARATURE ELECTRONIC THERMISTOR CAPILLARY CAPILLARY EXPANSION VALVE ( DOA ) TUBE TUBE FILTER...

  • Page 375: Bp Units

    Piping Diagrams Si18-201 BP Units BPMK928B42 INDOOR UNIT GAS SIDE ROOM A REFRIGERANT FLOW THERMISTOR ( DGA ) ( 15.9CuT ) HEATING COOLING GAS SIDE ROOM B THERMISTOR ( DGB ) ( 15.9CuT ) ELECTRONIC EXPANSION VALVE ( BYPASS ) ELECTRONIC INDOOR UNIT FILTER...

  • Page 376: Indoor Units

    Si18-201 Piping Diagrams Indoor Units FTK25 / 35JVE (A) 9, FTX25 / 35JVEA9, FTK25 / 35JVEC, FTX25 / 35JVEC, FTK25 / 35JAVET, FTX25 / 35JAVET, FTX25 / 35JAV1NB INDOOR UNIT HEAT EXCHANGER 7.0CuT 7.0CuT THERMISTOR 7.0CuT ON HEAT EXCH. 7.0CuT CROSS FLOW FAN FIELD PIPING ( 6.4CuT )
  • Page 377 Piping Diagrams Si18-201 FTXD50 / 60 / 71JVEA (9) , FTXD50 / 60 / 71JVET, FTXD50 / 60 / 71JV1B INDOOR UNIT THERMISTOR ON INLET PIPE HEAT EXCHANGER THERMISTOR ON HEAT EXCH. CROSS FLOW FAN FIELD PIPING CuT ) FAN MOTOR FTXD50- 12.7 FIELD PIPING...
  • Page 378 Si18-201 Piping Diagrams CDX25 / 35 / 50 / 60HAVEA, CDX25 / 35 / 50 / 60HAVEC, CDX25 / 35 / 50 / 60HAV1NB, CDX25 / 35 / 50 / 60JV1NB, CDX 25 / 35JVEC INDOOR UNIT CDX25- HEAT EXCHANGER CDX35 , 50- 12.7 CDX60-...
  • Page 379 Piping Diagrams Si18-201 FLK50 / 60JVEA (9) INDOOR UNIT HEAT EXCHANGER THERMISTOR ON HEAT EXCH. FIELD PIPING SIROCCO FAN ( 6.4CuT ) FAN MOTOR FIELD PIPING CuT ) REFRIGERANT FLOW COOLING FLK50- 12.7 FLK60- 15.9 4D024818A FLX25 / 35HVEA , FLX25 / 35 / 50 / 60HVEC, FLX25 / 35 / 50 / 60HVET, FLX25 / 35HV1NB INDOOR UNIT FLX25-...
  • Page 380 Si18-201 Piping Diagrams FLX50 / 60JVEA (9) , FLX50 / 60JV1B INDOOR UNIT THERMISTOR ON INLET PIPE HEAT EXCHANGER THERMISTOR ON HEAT EXCH. FIELD PIPING SIROCCO FAN ( 6.4CuT ) FAN MOTOR FIELD PIPING CuT ) REFRIGERANT FLOW COOLING FLX50- 12.7 HEATING FLX60-...
  • Page 381 Piping Diagrams Si18-201 FTK50 / 60HVEC, FTX50 / 60HVEC FTXD25 / 35KZV1B INDOOR UNIT HEAT EXCHANGER 7.0CuT 6.4CuT THERMISTOR ON LIQUID PIPE THERMISTOR 6.4CuT ON HEAT EXCH. 6.4CuT CROSS FLOW FAN FIELD PIPING ( 6.4CuT ) FAN MOTOR FTXD25KZV1B FIELD PIPING 9.5CuT FTKD25KZV1B CuT )
  • Page 382 Si18-201 Piping Diagrams FVX25 / 35KZV1B INDOOR UNIT HEAT EXCHANGER CROSS FLOW FAN FAN MOTOR 7.0CuT 7.0CuT CROSS FLOW FAN FAN MOTOR FIELD PIPING ( 6.4CuT ) 9.5CuT FIELD PIPING FVX ( K ) 25 9.5CuT FVX ( K ) 35 12.7CuT REFRIGERANT FLOW COOLING 4D028914...

  • Page 383: Wiring Diagrams

    Wiring Diagrams Si18-201 2. Wiring Diagrams Outdoor Units RMK140JVMC9 (8) POWER SUPPLY PCB2 ~50Hz 220-240V S952 S951 ~60Hz 220-230V L902 PCB1 C903 C925 C926 C905 C916 V900 L903 C906 C900 L900 ACTIVE FIELD WIRING S151 CT901 MODULE L901 C923 C924 C902 C915 C904...
  • Page 384 Si18-201 Wiring Diagrams RMK140JVMT9 PCB2 POWER SUPPLY S952 S951 ~ 60Hz 220V L902 PCB1 C905 C903 C925 C926 C916 ACTIVE V900 L900 L903 C900 C906 FIELD WIRING S151 MODULE CT901 L901 C923 C924 C902 C915 C904 V901 CT902 SA900 RY3X −...
  • Page 385 Wiring Diagrams Si18-201 RMK140JAVM PCB2 POWER SUPPLY ~ 50Hz 230V S952 S951 L902 PCB1 C925 C926 C905 C916 C903 V900 L900 L903 C900 C906 ACTIVE FIELD WIRING S151 MODULE CT901 L901 C923 C924 C902 C915 C904 V901 CT902 SA900 RY3X TO BP UNIT L904 R250...
  • Page 386 Si18-201 Wiring Diagrams RMK140JZVMA PCB2 POWER SUPPLY ~50Hz 220V-240V S952 S951 L902 PCB1 C905 C916 C903 C925 C926 V900 C900 L900 L903 C906 ACTIVE FIELD WIRING MODULE S151 L901 CT901 C923 C924 C902 C915 C904 V901 CT902 SA900 RY3X UNIT R250 L904 C927...

  • Page 387: Bp Units

    Wiring Diagrams Si18-201 BP Units BPMK928B42 ( DLA ) ( DLB ) Y1E~Y3E:ELECTRONIC ( DGB ) ( DGA ) EXPANSION VALVE GRN/YLW t˚ t˚ t˚ t˚ TO INDOOR UNITS ROOM B ( BLU ) TRANSMISSION CIRCUIT 3.15A ( WHT ) ROOM A ( RED ) BYPASS...

  • Page 388: Indoor Units

    Si18-201 Wiring Diagrams Indoor Units 2.3.1 Cooling Only FTK25 / 35JVE (A) 9, FTK25 / 35JAVET PCB3 PCB1 INTELLIGENT- → EYE SENSOR 3.15A TERMINAL FOR outdoor CENTRALIZED CONTROL PCB2 FIELD WIRING. GRN/YLW LED1 LED2 LED3 CAUTION NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF SIGNAL THE MAIN POWER SUPPLY IS...
  • Page 389 Wiring Diagrams Si18-201 FTKD50 / 60 / 71JVE (A) (9) , FTKD50 / 60 / 71JVET FIELD WIRING. → PCB3 PCB1 PCB2 outdoor 3.15A CAUTION NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN.
  • Page 390 Si18-201 Wiring Diagrams CDK25 / 35 / 50 / 60HAVE (A) , CDK25 / 35 / 50 / 60HAVET PCB1 PCB2 → 3.15A outdoor FIELD WIRING. / YLW TERMINAL CENTRALIZED CONTROL CAUTION SIGNAL NOTE THAT OPERATION WILL RECEIVER RESTART AUTOMATICALLY RTH1 MAIN POWER...
  • Page 391 Wiring Diagrams Si18-201 FLK25 / 35 / 50 / 60HVE (A) , FLK25 / 35 / 50 / 60HVET PCB1 PCB2 PCB3 3.15A → outdoor FIELD WIRING. GRN / PCB4 TERMINAL FOR CAUTION CENTRALIZED NOTE THAT OPERATION WILL CONTROL RESTART AUTOMATICALLY IF SIGNAL THE MAIN POWER SUPPLY IS RECEIVER...
  • Page 392 Si18-201 Wiring Diagrams FLK50 / 60JVEA (9) PCB2 PCB1 PCB3 3.15A → outdoor FIELD WIRING. PCB4 CAUTION NOTE THAT OPERATION WILL SIGNAL RESTART AUTOMATICALLY IF RECEIVER THE MAIN POWER SUPPLY IS indoor TURNED OFF AND THEN BACK ON AGAIN. t˚ t˚...
  • Page 393 Wiring Diagrams Si18-201 FHYC35 / 50 / 60 / 71KVE9 Appendix...
  • Page 394 Si18-201 Wiring Diagrams FHYC35 / 50 / 60 / 71KV1C9 Appendix...
  • Page 395 Wiring Diagrams Si18-201 FDYM60 / 03FAV1 FDYM60 / 03FAVAL Appendix...
  • Page 396 Si18-201 Wiring Diagrams FDYM60 / 03FAV1C Appendix...
  • Page 397 Wiring Diagrams Si18-201 2.3.2 Heat Pump FTX25 / 35JVEA9, FTX25 / 35JAVET, FTX25 / 35JAV1NB, FTXD25 / 35KZV1B PCB3 PCB1 INTELLIGENT- → EYE SENSOR 3.15A TERMINAL FOR outdoor CENTRALIZED CONTROL PCB2 GRN/YLW LED3 LED1 LED2 FIELD WIRING. CAUTION NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF SIGNAL THE MAIN POWER SUPPLY IS...
  • Page 398 Si18-201 Wiring Diagrams CDX25 / 35 / 50 / 60HAVEA, CDX25 / 35 / 50 / 60HAV1NB, CDX25 / 35 / 50 / 60JV1NB PCB1 PCB2 → 3.15A outdoor FIELD WIRING. / YLW TERMINAL CENTRALIZED CONTROL CAUTION SIGNAL NOTE THAT OPERATION WILL RESTART...
  • Page 399 Wiring Diagrams Si18-201 FLX50 / 60JVEA (9) , FLX50 / 60JV1B PCB2 PCB1 PCB3 3.15A → outdoor FIELD WIRING. PCB4 CAUTION NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF SIGNAL THE MAIN POWER SUPPLY IS RECEIVER TURNED OFF AND THEN BACK indoor ON AGAIN.
  • Page 400 Si18-201 Wiring Diagrams FTX50 / 60HVEC FIELD WIRING. → PCB3 PCB1 PCB2 outdoor 3.15A CAUTION NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN. BLU: BLK: WHT: PCB4 RED: GRN: YLW: PCB1~PCB4 PRINTED CIRCUIT BOARD...
  • Page 401 Wiring Diagrams Si18-201 FLX25 / 35 / 50 / 60HVEC PCB1 PCB2 PCB3 3.15A 2 TO OUTDOOR UNIT FIELD WIRING. / YLW PCB4 TERMINAL FOR CAUTION CENTRALIZED CONTROL NOTE THAT OPERATION WILL SIGNAL RESTART AUTOMATICALLY IF RECEIVER THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN.

  • Page 402: Index

    Si18-201 Index Index Index Index Symbols Compressor Protection Control ......142 Cooling / Heating Standby Operation at Startup . 112 * ............237, 238, 239, 240 Cooling Monitoring Function ......... 93 Numerics Cooling Outdoor Unit SC Control ......151 3 Step Flow ............82 3-Minutes Standby Function ........94 Defrost Operation ..........
  • Page 403 Si18-201 Faulty Outside Air Thermistor ......274 JIS Mode ............. 167 Faulty PCB ............232 Faulty Power Supply or Indoor Unit PCB ..239, 240 FC ................269 L3 ................ 282 Field Setting L4 ................ 283 Wired Remote Controller .......212 L5 ................ 284 Wireless Remote Controller ......213 L7 ................
  • Page 404 Si18-201 Operation Halt Due to Detection of Thermistor or Removal of Motorized Valve ....... 315, 332 Related Abnormality ........236 Removal of Outer Panels ........320 Operation Halt Due to Discharge Pipe Temperature Removal of PCB and Electrical Box ....321 Control ............268 Removal of Propeller Fans and Fan Motors ..
  • Page 405 Si18-201 Troubleshooting with the LED Indication ....227 Troubleshooting with the Operation Lamp ...226 U0 .................295 U2 .................290 U4 ..........239, 240, 243, 291 U5 .................244 U6 .................293 U7 .................294 UH ................297 Ultra-Long-Life Filter Sign Setting ......218 Voltage Check when Starting the Compressor ..307 Warm-Up Function ..........141 Washable Grille ............85 Wet Protection Control I ........135...
  • Page 406 Si18-201 Drawings & Flow Charts Drawings & Flow Charts Drawings & Flow Charts Drawings & Flow Charts Numerics 1-Room Operation — Indoor Unit Large Capacity Defrost Operation ........122 (Cooling) ............180 Detection method by human motion sensor ..90 1-Room Operation — Indoor Unit Large Capacity Determination of Initial Frequency ......
  • Page 407 Si18-201 FHYC35~71KV Series Printed Circuit Board ........74 LED On Branch Provider Unit ......310 Field Setting Location of Operation Lamp ........ 226 Wired Remote Controller .......212 Low Outside Air Temperature Cooling ....176 Wireless Remote Controller ......213 LP Drop Error ............269 Filter Check Indicator ..........97 Filter Cleaning Indicator .........86 Fin temperature Hz drooping function ....136...
  • Page 408 Si18-201 Operation Halt Due to the Freeze Power Supply Waveforms Check ......308 Protection Function ........233 Power Transistor Output Check ......304 Outdoor Unit Motorized Valve Control During High Power-Airflow Flap & Diffuser Discharge Pipe Temperature ......149 In Cooling Operation ........78 Outdoor Unit RMK (X) 140JVMT (C) 9 (8), In Heating Operation ........
  • Page 409 Si18-201 Troubleshooting with the LED Indication .....227 FTX50 / 60HVEC .......... 387 FTXD50 / 60 / 71JVEA (9) , FTXD50 / 60 / 71JVET, FTXD50 / 60 / 71JV1B ..384 Using the remote controller for trial operation ..357 FVX25 / 35KZV1B ........388 RMK140JAVM ..........
  • Page 410 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 Japan 10/2002 AK...

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