Daikin RXMQ4·5·6PVE Service Manual
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Daikin RXMQ4·5·6PVE Service Manual

R-410a heat pump 50/60hz cooling only
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Si34 - 603
RX(Y)MQ4·5·6PVE
R-410A
Heat Pump 50/60Hz
Cooling Only 50/60Hz

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Summary of Contents for Daikin RXMQ4·5·6PVE

  • Page 1 Si34 - 603 RX(Y)MQ4·5·6PVE R-410A Heat Pump 50/60Hz Cooling Only 50/60Hz...

  • Page 2: Table Of Contents

    Si34-603 R-410A Heat Pump / Cooling Only 50/60Hz 1. Introduction .....................v 1.1 Safety Cautions ..................v 1.2 PREFACE ....................ix Part 1 General Information ............1 1. Model Names of Indoor/Outdoor Units............2 2. External Appearance................3 2.1 Indoor Units ....................3 3. Capacity Range..................4 Part 2 Specifications ..............
  • Page 3 Si34-603 Protection Control .................60 High Pressure Protection Control............60 Low Pressure Protection Control............61 Discharge Pipe Protection Control ............62 Inverter Protection Control ..............63 Other Control..................64 Demand Operation .................64 Heating Operation Prohibition ..............64 6. Outline of Control (Indoor Unit) .............65 Drain Pump Control................65 Louver Control for Preventing Ceiling Dirt..........67 Thermostat Sensor in Remote Controller..........68 Freeze Prevention ..................70...
  • Page 4 Si34-603 3.12 “CA” Indoor Unit: Malfunction of Thermistor for Discharge Air....144 3.13 “CJ” Indoor Unit: Malfunction of Thermostat Sensor in Remote Controller ................145 3.14 “E1” Outdoor Unit: PC Board Defect ............146 3.15 “E3” Outdoor Unit: Actuation of High Pressure Switch ......147 3.16 “E4”...
  • Page 5 Si34-603 Troubleshooting by Indication on the Centralized Remote Controller ................190 4.1 “UE” Malfunction of Transmission between Centralized Remote Controller and Indoor Unit ..............190 4.2 “M1” PC Board Defect ................191 4.3 “M8” Malfunction of Transmission between Optional Controllers for Centralized Control................192 4.4 “MA”...

  • Page 6: Introduction

    Si34-603 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 7: Cautions Regarding Products After Repair

    Introduction Si34-603 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 8: Inspection After Repair

    Si34-603 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 9: Using Icons

    Introduction Si34-603 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 10: Preface

    PREFACE Thank you for your continued patronage of Daikin products. This is the new service manual for Daikin's Year 2006 VRVIII-S series Heat Pump / Cooling Only System. Daikin offers a wide range of models to respond to building and office air conditioning needs.
  • Page 11 Introduction Si34-603...

  • Page 12: Part 1 General Information

    Si34-603 Part 1 General Information 1. Model Names of Indoor/Outdoor Units............2 2. External Appearance................3 2.1 Indoor Units ....................3 3. Capacity Range..................4 General Information...

  • Page 13: Model Names Of Indoor/Outdoor Units

    Model Names of Indoor/Outdoor Units Si34-603 1. Model Names of Indoor/Outdoor Units *Indoor Units Type Model Name Power Supply Ceiling Mounted FXCQ — 125M Cassette Type (Double Flow) Ceiling Mounted FXFQ — 100M 125M Cassette Type (Multi Flow) Ceiling Mounted FXKQ —...

  • Page 14: External Appearance

    Si34-603 External Appearance 2. External Appearance Indoor Units Ceiling Mounted Cassette Type (Double Flow) Ceiling Suspended Type FXCQ20M FXHQ32MA FXCQ25M FXHQ63MA FXCQ32M FXHQ100MA FXCQ40M FXCQ50M FXCQ63M FXCQ80M FXCQ125M Ceiling Mounted Cassette Type (Multi Flow) Wall Mounted Type FXFQ25M FXAQ20MA FXFQ32M FXAQ25MA FXFQ40M FXAQ32MA...

  • Page 15: Capacity Range

    Capacity Range Si34-603 3. Capacity Range Outdoor Units Capacity Range RX(Y)MQ No of Indoor Units to be Connected Total Capacity Index of Indoor 50~130 62.5~162.5 70~182 Units to be Connected Indoor Units Capacity Range 0.8HP 1.25HP 1.6HP 2.5HP 3.2HP Capacity Index 31.25 62.5 Ceiling Mounted...

  • Page 16: Part 2 Specifications

    Si34-603 Part 2 Specifications 1. Specifications ..................6 1.1 Outdoor Units ...................6 Indoor Units ....................10 Specifications...

  • Page 17: Specifications

    Specifications Si34-603 1. Specifications Outdoor Units Heat Pump 50/60Hz <RXYMQ-PVE> Model Name RXYMQ4PVE RXYMQ5PVE kcal / h 9,600 12,000 1 Cooling Capacity Btu / h 38,200 47,800 11.2 14.0 kcal / h 10,800 13,800 2 Heating Capacity Btu / h 42,700 54,600 12.5...
  • Page 18 Si34-603 Specifications Model Name RXYMQ6PVE kcal / h 13,300 1 Cooling Capacity Btu / h 52,900 15.5 kcal / h 15,500 2 Heating Capacity Btu / h 61,400 18.0 Casing Color Ivory White Dimensions: (H×W×D) 1,345×900×320 Heat Exchanger Cross Fin Coil Type Hermetically Sealed Scroll Type Piston Displacement...
  • Page 19 Specifications Si34-603 Cooling Only 50/60Hz <RXMQ-PVE> Model Name RXMQ4PVE RXMQ5PVE kcal / h 9,600 12,000 1 Cooling Capacity Btu / h 38,200 47,800 11.2 14.0 Casing Color Ivory White Ivory White Dimensions: (H×W×D) 1,345×900×320 1,345×900×320 Heat Exchanger Cross Fin Coil Cross Fin Coil Type Hermetically Sealed Scroll Type...
  • Page 20 Si34-603 Specifications Model Name RXMQ6PVE kcal / h 13,300 1 Cooling Capacity Btu / h 52,900 15.5 Casing Color Ivory White Dimensions: (H×W×D) 1,345×900×320 Heat Exchanger Cross Fin Coil Type Hermetically Sealed Scroll Type Piston Displacement m³/h 19.36 Number of Revolutions r.p.m 6,480 Comp.

  • Page 21: Indoor Units

    Specifications Si34-603 Indoor Units Ceiling Mounted Cassette Type (Double Flow) Model FXCQ20MVE FXCQ25MVE FXCQ32MVE FXCQ40MVE kcal/h 2,000 2,500 3,200 4,000 1 Cooling Capacity (19.5°CWB) Btu/h 7,800 9,900 12,600 16,000 2 Cooling Capacity (19.0°CWB) kcal/h 2,200 2,800 3,400 4,300 3 Heating Capacity Btu/h 8,500 10,900...
  • Page 22 Si34-603 Specifications Ceiling Mounted Cassette Type (Double Flow) Model FXCQ50MVE FXCQ63MVE FXCQ80MVE FXCQ125MVE kcal/h 5,000 6,300 8,000 12,500 1 Cooling Capacity (19.5°CWB) Btu/h 19,800 24,900 31,700 49,500 14.5 2 Cooling Capacity (19.0°CWB) 14.0 kcal/h 5,400 6,900 8,600 13,800 3 Heating Capacity Btu/h 21,500 27,300...
  • Page 23 Specifications Si34-603 Ceiling Mounted Cassette Type (Multi-flow) Model FXFQ25MVE FXFQ32MVE FXFQ40MVE FXFQ50MVE kcal/h 2,500 3,200 4,000 5,000 1 Cooling Capacity (19.5°CWB) Btu/h 9,900 12,600 16,000 19,800 2 Cooling Capacity (19.0°CWB) kcal/h 2,800 3,400 4,300 5,400 3 Heating Capacity Btu/h 10,900 13,600 17,100 21,500...
  • Page 24 Si34-603 Specifications Ceiling Mounted Cassette Type (Multi-flow) Model FXFQ63MVE FXFQ80MVE FXFQ100MVE FXFQ125MVE kcal/h 6,300 8,000 10,000 12,500 1 Cooling Capacity (19.5°CWB) Btu/h 24,900 31,700 39,600 49,500 11.6 14.5 2 Cooling Capacity (19.0°CWB) 11.2 14.0 kcal/h 6,900 8,600 10,800 13,800 3 Heating Capacity Btu/h 27,300 34,100...
  • Page 25 Specifications Si34-603 Ceiling Mounted Cassette Corner Type Model FXKQ25MAVE FXKQ32MAVE FXKQ40MAVE FXKQ63MAVE kcal/h 2,500 3,200 4,000 6,300 1 Cooling Capacity (19.5°CWB) Btu/h 9,900 12,600 16,000 24,900 2 Cooling Capacity (19.0°CWB) kcal/h 2,800 3,400 4,300 6,900 3 Heating Capacity Btu/h 10,900 13,600 17,100 27,300...
  • Page 26 Si34-603 Specifications Slim Ceiling Mounted Duct Type (with Drain Pump) Model FXDQ20NAVE FXDQ25NAVE FXDQ32NAVE kcal/h 2,000 2,500 3,200 1 Cooling Capacity (19.5°CWB) Btu/h 7,800 9,900 12,600 2 Cooling Capacity (19.0°CWB) kcal/h 2,200 2,800 3,400 3 Heating Capacity Btu/h 8,500 10,900 13,600 Casing Galvanized Steel Plate...
  • Page 27 Specifications Si34-603 Slim Ceiling Mounted Duct Type (with Drain Pump) Model FXDQ40NAVE FXDQ50NAVE FXDQ63NAVE kcal/h 4,000 5,000 6,300 1 Cooling Capacity (19.5°CWB) Btu/h 16,000 19,800 24,900 2 Cooling Capacity (19.0°CWB) kcal/h 4,300 5,400 6,900 3 Heating Capacity Btu/h 17,100 21,500 27,300 Casing Color Galvanized Steel Plate...
  • Page 28 Si34-603 Specifications Slim Ceiling Mounted Duct Type (without Drain Pump) Model FXDQ20NVET FXDQ25NVET FXDQ32NVET kcal/h 2,000 2,500 3,200 1 Cooling Capacity (19.5°CWB) Btu/h 7,800 9,900 12,600 2 Cooling Capacity (19.0°CWB) kcal/h 2,200 2,800 3,400 3 Heating Capacity Btu/h 8,500 10,900 13,600 Casing Galvanized Steel Plate...
  • Page 29 Specifications Si34-603 Slim Ceiling Mounted Duct Type (without Drain Pump) Model FXDQ40NVET FXDQ50NVET FXDQ63NVET kcal/h 4,000 5,000 6,300 1 Cooling Capacity (19.5°CWB) Btu/h 16,000 19,800 24,900 2 Cooling Capacity (19.0°CWB) kcal/h 4,300 5,400 6,900 3 Heating Capacity Btu/h 17,100 21,500 27,300 Casing Color Galvanized Steel Plate...
  • Page 30 Si34-603 Specifications Slim Ceiling Mounted Duct Type (PVE: with Drain Pump PVET: without Drain Pump) FXDQ20PVE FXDQ25PVE FXDQ32PVE Model FXDQ20PVET FXDQ25PVET FXDQ32PVET kcal/h 2,000 2,500 3,200 1 Cooling Capacity (19.5°CWB) Btu/h 7,800 9,900 12,600 2 Cooling Capacity (19.0°CWB) kcal/h 2,200 2,800 3,400 3 Heating Capacity...
  • Page 31 Specifications Si34-603 Ceiling Mounted Built-in Type Model FXSQ20MVE FXSQ25MVE FXSQ32MVE kcal/h 2,000 2,500 3,200 1 Cooling Capacity (19.5°CWB) Btu/h 7,800 9,900 12,600 2 Cooling Capacity (19.0°CWB) kcal/h 2,200 2,800 3,400 3 Heating Capacity Btu/h 8,500 10,900 13,600 Casing Galvanized Steel Plate Galvanized Steel Plate Galvanized Steel Plate Dimensions: (H×W×D)
  • Page 32 Si34-603 Specifications Ceiling Mounted Built-in Type Model FXSQ40MVE FXSQ50MVE FXSQ63MVE kcal/h 4,000 5,000 6,300 1 Cooling Capacity (19.5°CWB) Btu/h 16,000 19,800 24,900 2 Cooling Capacity (19.0°CWB) kcal/h 4,300 5,400 6,900 3 Heating Capacity Btu/h 17,100 21,500 27,300 Casing Galvanized Steel Plate Galvanized Steel Plate Galvanized Steel Plate Dimensions: (H×W×D)
  • Page 33 Specifications Si34-603 Ceiling Mounted Built-in Type Model FXSQ80MVE FXSQ100MVE FXSQ125MVE kcal/h 8,000 10,000 12,500 1 Cooling Capacity (19.5°CWB) Btu/h 31,700 39,600 49,500 11.6 14.5 2 Cooling Capacity (19.0°CWB) 11.2 14.0 kcal/h 8,600 10,800 13,800 3 Heating Capacity Btu/h 34,100 42,700 54,600 10.0 12.5...
  • Page 34 Si34-603 Specifications Ceiling Mounted Duct Type Model FXMQ40MAVE FXMQ50MAVE FXMQ63MAVE FXMQ80MAVE kcal/h 4,000 5,000 6,300 8,000 1 Cooling Capacity (19.5°CWB) Btu/h 16,000 19,800 24,900 31,700 2 Cooling Capacity (19.0°CWB) kcal/h 4,300 5,400 6,900 8,600 3 Heating Capacity Btu/h 17,100 21,500 27,300 34,100 10.0...
  • Page 35 Specifications Si34-603 Ceiling Mounted Duct Type Model FXMQ100MAVE FXMQ125MAVE kcal/h 10,000 12,500 1 Cooling Capacity (19.5°CWB) Btu/h 39,600 49,500 11.6 14.5 2 Cooling Capacity (19.0°CWB) 11.2 14.0 kcal/h 10,800 13,800 3 Heating Capacity Btu/h 42,700 54,600 12.5 16.0 Casing Galvanized Steel Plate Galvanized Steel Plate Dimensions: (H×W×D) 390×1,110×690...

  • Page 36: Ceiling Suspended Type

    Si34-603 Specifications Ceiling Suspended Type Model FXHQ32MAVE FXHQ63MAVE FXHQ100MAVE kcal/h 3,200 6,300 10,000 1 Cooling Capacity (19.5°CWB) Btu/h 12,600 24,900 39,600 11.6 2 Cooling Capacity (19.0°CWB) 11.2 kcal/h 3,400 6,900 10,800 3 Heating Capacity Btu/h 13,600 27,300 42,700 12.5 Casing Color White (10Y9/0.5) White (10Y9/0.5) White (10Y9/0.5)

  • Page 37: Wall Mounted Type

    Specifications Si34-603 Wall Mounted Type Model FXAQ20MAVE FXAQ25MAVE FXAQ32MAVE kcal/h 2,000 2,500 3,200 1 Cooling Capacity (19.5°CWB) Btu/h 7,800 9,900 12,600 2 Cooling Capacity (19.0°CWB) kcal/h 2,200 2,800 3,400 3 Heating Capacity Btu/h 8,500 10,900 13,600 Casing Color White (3.0Y8.5/10.5) White (3.0Y8.5/10.5) White (3.0Y8.5/10.5) Dimensions: (H×W×D)
  • Page 38 Si34-603 Specifications Wall Mounted Type Model FXAQ40MAVE FXAQ50MAVE FXAQ63MAVE kcal/h 4,000 5,000 6,300 1 Cooling Capacity (19.5°CWB) Btu/h 16,000 19,800 24,900 2 Cooling Capacity (19.0°CWB) kcal/h 4,300 5,400 6,900 3 Heating Capacity Btu/h 17,100 21,500 27,300 Casing Color White (3.0Y8.5/10.5) White (3.0Y8.5/10.5) White (3.0Y8.5/10.5) Dimensions: (H×W×D)

  • Page 39: Floor Standing Type

    Specifications Si34-603 Floor Standing Type Model FXLQ20MAVE FXLQ25MAVE FXLQ32MAVE kcal/h 2,000 2,500 3,200 1 Cooling Capacity (19.5°CWB) Btu/h 7,800 9,900 12,600 2 Cooling Capacity (19.0°CWB) kcal/h 2,200 2,800 3,400 3 Heating Capacity Btu/h 8,500 10,900 13,600 Casing Color Ivory White (5Y7.5/1) Ivory White (5Y7.5/1) Ivory White (5Y7.5/1) Dimensions: (H×W×D)
  • Page 40 Si34-603 Specifications Floor Standing Type Model FXLQ40MAVE FXLQ50MAVE FXLQ63MAVE kcal/h 4,000 5,000 6,300 1 Cooling Capacity (19.5°CWB) Btu/h 16,000 19,800 24,900 2 Cooling Capacity (19.0°CWB) kcal/h 4,300 5,400 6,900 3 Heating Capacity Btu/h 17,100 21,500 27,300 Casing Color Ivory White (5Y7.5/1) Ivory White (5Y7.5/1) Ivory White (5Y7.5/1) Dimensions: (H×W×D)
  • Page 41 Specifications Si34-603 Concealed Floor Standing Type Model FXNQ20MAVE FXNQ25MAVE FXNQ32MAVE kcal/h 2,000 2,500 3,200 1 Cooling Capacity (19.5°CWB) Btu/h 7,800 9,900 12,600 2 Cooling Capacity (19.0°CWB) kcal/h 2,200 2,800 3,400 3 Heating Capacity Btu/h 8,500 10,900 13,600 Casing Color Galvanized Steel Plate Galvanized Steel Plate Galvanized Steel Plate Dimensions: (H×W×D)
  • Page 42 Si34-603 Specifications Concealed Floor Standing Type Model FXNQ40MAVE FXNQ50MAVE FXNQ63MAVE kcal/h 4,000 5,000 6,300 1 Cooling Capacity (19.5°CWB) Btu/h 16,000 19,800 24,900 2 Cooling Capacity (19.0°CWB) kcal/h 4,300 5,400 6,900 3 Heating Capacity Btu/h 17,100 21,500 27,300 Casing Color Galvanized Steel Plate Galvanized Steel Plate Galvanized Steel Plate Dimensions: (H×W×D)
  • Page 43 Specifications Si34-603 Ceiling Suspended Cassette Type Indoor Unit FXUQ71MAV1 FXUQ100MAV1 FXUQ125MAV1 Model Connection Unit BEVQ71MAVE BEVQ100MAVE BEVQ125MAVE kcal/h 7,100 10,000 12,500 1 Cooling Capacity (19.5°CWB) Btu/h 28,300 39,600 49,500 11.6 14.5 2 Cooling Capacity (19.0°CWB) 11.2 14.0 kcal/h 7,700 10,800 12,000 3 Heating Capacity Btu/h...
  • Page 44 Si34-603 Specifications BEV Units Model BEVQ71MAVE BEVQ100MAVE BEVQ125MAVE Power Supply 1 Phase 50Hz 220~240V 1 Phase 50Hz 220~240V 1 Phase 50Hz 220~240V Casing Galvanized Steel Plate Galvanized Steel Plate Galvanized Steel Plate Dimensions: (H×W×D) 100×350×225 100×350×225 100×350×225 Flame and Heat Resistant Foamed Flame and Heat Resistant Foamed Flame and Heat Resistant Foamed Sound Absorbing Thermal Insulation Material...
  • Page 45 Specifications Si34-603 Specifications...

  • Page 46: Part 3 List Of Electrical And Functional Parts

    Si34-603 Part 3 List of Electrical and Functional Parts 1. List of Electrical and Functional Parts ...........36 1.1 Outdoor Unit ...................36 1.2 Indoor Unit....................37 List of Electrical and Functional Parts...

  • Page 47: List Of Electrical And Functional Parts

    List of Electrical and Functional Parts Si34-603 1. List of Electrical and Functional Parts Outdoor Unit Model Remark Item Name Symbol (PCB terminal) Type JT100G-VDL@T Relay Inverter Compressor Output 2.5kW 3.0kW 3.5kW A1P X102A Crankcase heater (INV) E1HC A1P X28A Motor M1F·M2F 0.07kW...

  • Page 48: Indoor Unit

    Si34-603 List of Electrical and Functional Parts Indoor Unit Model Parts Name Symbol Remark FXFQ25 FXFQ32 FXFQ40 FXFQ50 FXFQ63 FXFQ80 FXFQ100 FXFQ125 Wired Remote BRC1C62 Controller Remote Option Controller Wireless Remote BRC7E61W Controller Fan Motor DC380V 30W 8P DC 380V 120W 8P AC220-240V (50Hz) AC220V (60Hz) Drain Pump PLD-12230DM...
  • Page 49 List of Electrical and Functional Parts Si34-603 Model Parts Name Symbol Remark FXKQ FXKQ FXKQ FXKQ 25MAVE 32MAVE 40MAVE 63MAVE Wired Remote BRC1C62 Option Controller Remote Controller Wireless Remote BRC4C61 Controller AC 220~240V 50Hz 1φ15W 4P 1φ20W 4P 1φ45W 4P Fan Motor Thermal protector 120°C : OFF 105°C :...
  • Page 50 Si34-603 List of Electrical and Functional Parts Model Parts Name Symbol Remark FXSQ FXSQ FXSQ FXSQ FXSQ FXSQ FXSQ FXSQ FXSQ 20MVE 25MVE 32MVE 40MVE 50MVE 63MVE 80MVE 100MVE 125MVE Wired Remote BRC1C62 Controller Remote Option Controller Wireless Remote BRC4C62 Controller AC 220~240V 50Hz 1φ125...
  • Page 51 List of Electrical and Functional Parts Si34-603 Model Parts Name Symbol Remark FXHQ FXHQ FXHQ 32MAVE 63MAVE 100MAVE Wired Remote BRC1C62 Option Remote Controller Controller Wireless Controller BRC7E63W AC 220~240V/220V 50Hz/60Hz Fan Motor 1φ63W 1φ130W Thermal protector 130°C : OFF 80°C : ON Motors 9.0µF-400V...
  • Page 52 Si34-603 List of Electrical and Functional Parts Model Parts Name Symbol Remark FXLQ FXLQ FXLQ FXLQ FXLQ FXLQ 20MAVE 25MAVE 32MAVE 40MAVE 50MAVE 63MAVE Wired Remote BRC1C62 Controller Remote Option Controller Wireless Remote BRC4C62 Controller AC 220~240V 50Hz Fan Motor 1φ15W 1φ25W 1φ35W...
  • Page 53 List of Electrical and Functional Parts Si34-603 Model Parts Name Symbol Remark FXUQ71MAV1 FXUQ100MAV1 FXUQ125MAV1 Wired Remote BRC1C62 Controller Remote Option Controller Wireless Remote BRC7C528W Controller AC 220~240V 50Hz 1φ45W 1φ90W Fan Motor Thermal protector 130°C : OFF 83°C : ON Thermal protector 130°C Motors AC220-240V (50Hz) AC220V (60Hz)

  • Page 54: Part 4 Refrigerant Circuit

    Si34-603 Part 4 Refrigerant Circuit Refrigerant Circuit .................44 RX(Y)MQ4 / 5 / 6P .................44 2. Functional Parts Layout ................46 2.1 RX(Y)MQ4 / 5 / 6P .................46 Refrigerant Circuit...

  • Page 55: Refrigerant Circuit

    Refrigerant Circuit Si34-603 Refrigerant Circuit RX(Y)MQ4 / 5 / 6P No. in refrigerant Symbol Name Major Function system diagram Inverter compressor is operated on frequencies between 36 Hz and 195 Hz by using Inverter compressor (INV) the inverter. 31 steps Since the system is of air heat exchanging type, the fan is operated at 8-step rotation Inverter fan speed by using the inverter.
  • Page 56 Si34-603 Refrigerant Circuit C : 3D052627A Refrigerant Circuit...

  • Page 57: Functional Parts Layout

    Functional Parts Layout Si34-603 2. Functional Parts Layout RX(Y)MQ4 / 5 / 6P Birds-eye view THERMISTOR (SUCTION 2) (MARKING COLOR:GREEN) S1PH PRESSURE SWITCH Refrigerant Circuit...

  • Page 58: Part 5 Function

    Si34-603 Part 5 Part 5 Part 5 Part 5 Function 1. Operation Mode ..................48 2. Basic Control..................49 2.1 Normal Operation ...................49 2.2 Compressor PI Control................50 2.3 Electronic Expansion Valve PI Control...........51 2.4 Cooling Operation Fan Control...............52 3. Special Control..................53 3.1 Startup Control ..................53 3.2 Oil Return Operation ................54 3.3 Defrosting Operation ................56 3.4 Pump-down Residual Operation ............57...

  • Page 59: Operation Mode

    Operation Mode Si34-603 Operation Mode Operation in stop mode Indoor unit stop or Indoor unit thermostat ON thermostat OFF Malfunction/Standby Restart standby Pressure (Compressor stop) equalization prior to startup Malfunction/ Standby Indoor unit stop or thermostat OFF Startup control • Cooling startup Pump-down control residual...

  • Page 60: Basic Control

    Si34-603 Basic Control Basic Control Normal Operation Cooling Operation Actuator Operation Remarks Used for high pressure protection control, low pressure protection control, discharge pipe Compressor Compressor PI control temperature protection control, and compressor operating frequency upper limit control with inverter protection control. ...

  • Page 61: Compressor Pi Control

    Basic Control Si34-603 Compressor PI Control Compressor PI Control Carries out the compressor capacity PI control to maintain Te at constant during cooling operation and Tc at constant during heating operation to ensure stable unit performance. [Cooling operation] Controls compressor capacity to adjust Te to Te : Low pressure equivalent saturation temperature achieve target value (TeS).

  • Page 62: Electronic Expansion Valve Pi Control

    Si34-603 Basic Control Electronic Expansion Valve PI Control Main Electronic Expansion Valve EV1 Control Carries out the electronic expansion valve (Y1E) PI control to maintain the evaporator outlet superheated degree (SH) at constant during heating operation to make maximum use of the outdoor unit heat exchanger (evaporator).

  • Page 63: Cooling Operation Fan Control

    Basic Control Si34-603 Cooling Operation Fan Control In cooling operation with low outdoor air temperature, this control is used to provide the adequate amount of circulation air with liquid pressure secured by high pressure control using outdoor unit fan. Furthermore, when outdoor temperature ≥ 20°C, the compressor will run in Step 7 or higher. When outdoor temperature ≥...

  • Page 64: Special Control

    Si34-603 Special Control Special Control Startup Control This control is used to equalize the pressure in the front and back of the compressor prior to the startup of the compressor, thus reducing startup loads. Furthermore, the inverter is turned ON to charge the capacitor. In addition, to avoid stresses to the compressor due to oil return or else after the startup, the following control is made and the position of the four way valve is also determined.

  • Page 65: Oil Return Operation

    Special Control Si34-603 Oil Return Operation In order to prevent the compressor from running out of oil, the oil return operation is conducted to recover oil flown out from the compressor to the system side. 3.2.1 Oil Return Operation in Cooling Operation [Start conditions] Referring to the set conditions for the following items, start the oil return operation in cooling.
  • Page 66 Si34-603 Special Control 3.2.2 Oil Return Operation in Heating Operation [Conditions to start] The heating oil-returning operation is started referring following conditions. Integrated amount of displaced oil Timer (After the power is turned on, integrated operating-time is 2 hours and subsequently every 8 hours.) In addition, integrated amount of displaced oil is derived from Tc, Te, and the compressor load.

  • Page 67: Defrosting Operation

    Special Control Si34-603 Defrosting Operation The defrost operation is performed to solve frost on the outdoor unit heat exchanger when heating, and the heating capacity is recovered. [Conditions to start] The defrost operation is started referring following conditions. Outdoor heat exchanger heat transfer co-efficiency Temperature of heat-exchange (Tb) Timer (2 hours at the minimum) In addition, outdoor heat-exchange co-efficiency is derived from Tc, Te, and the compressor...

  • Page 68: Pump-Down Residual Operation

    Si34-603 Special Control Pump-down Residual Operation When activating compressor, if the liquid refrigerant remains in the heat-exchanger, the liquid enters into the compressor and dilutes oil therein resulting in decrease of lubricity. Therefore, the pump-down residual operation is performed to collect the refrigerant in the heat- exchanger when the compressor is down.

  • Page 69: Restart Standby

    Special Control Si34-603 Restart Standby Restart is stood by force to prevent frequent power-on/off and to equalize pressure in the refrigerant system. Actuator Operation Remarks  Compressor Ta>30°C: STEP4  Outdoor unit fan Ta≤30°C: OFF  Four way valve Keep former condition. ...

  • Page 70: Stopping Operation

    Si34-603 Special Control Stopping Operation Operation of the actuator when the system is down, is cleared up. 3.6.1 When System is in Stop Mode Actuator Operation Compressor Outdoor unit fan Four way valve Keep former condition. Main electronic expansion valve (EV1) 0 pls Subcooling electronic expansion valve (EV3) 0 pls...

  • Page 71: Protection Control

    Protection Control Si34-603 Protection Control High Pressure Protection Control This high pressure protection control is used to prevent the activation of protection devices due to abnormal increase of high pressure and to protect compressors against the transient increase of high pressure. [In cooling operation] Pc>3.47MPa High pressure not limited...

  • Page 72: Low Pressure Protection Control

    Si34-603 Protection Control Low Pressure Protection Control This low pressure protection control is used to protect compressors against the transient decrease of low pressure. [In cooling operation] Low pressure not limited Pe: LP pressure sensor detection value Pe<0.25MPa Pe>0.39MPa Low pressure Hot gas SVP = OFF limited Pe<0.15MPa...

  • Page 73: Discharge Pipe Protection Control

    Protection Control Si34-603 Discharge Pipe Protection Control This discharge pipe protection control is used to protect the compressor internal temperature against a malfunction or transient increase of discharge pipe temperature. [INV compressor] Discharge pipe protection HTdi :Value of INV compressor discharge pipe control not limited temperature (Tdi) compensated with outdoor air temperature...

  • Page 74: Inverter Protection Control

    Si34-603 Protection Control Inverter Protection Control Inverter current protection control and inverter fin temperature control are performed to prevent tripping due to a malfunction, or transient inverter overcurrent, and fin temperature increase. [Inverter overcurrent protection control] Not limited •Inverter current ≤ 23.8A &...

  • Page 75: Other Control

    Other Control Si34-603 Other Control Demand Operation In order to save the power consumption, the capacity of outdoor unit is saved with control forcibly by using “Demand 1 Setting”. To operate the unit with this mode, additional setting of “Continuous Demand Setting”. [Demand 1 setting] Setting Standard for upper limit of power consumption...

  • Page 76: Outline Of Control (Indoor Unit)

    Si34-603 Outline of Control (Indoor Unit) 6. Outline of Control (Indoor Unit) Drain Pump Control 1. The drain pump is controlled by the ON/OFF buttons (4 button (1) - (4) given in the figure below). 6.1.1 When the Float Switch is Tripped while the Cooling Thermostat is ∗...

  • Page 77: Remote Controller

    Outline of Control (Indoor Unit) Si34-603 6.1.3 When the Float Switch is Tripped During Heating Operation: During heating operation, if the float switch is not reset even after the 5 minutes operation, 5 seconds stop, 5 minutes operation cycle ends, operation continues until the switch is reset. 6.1.4 When the Float Switch is Tripped and “AF”...

  • Page 78: Louver Control For Preventing Ceiling Dirt

    Si34-603 Outline of Control (Indoor Unit) Louver Control for Preventing Ceiling Dirt We have added a control feature that allows you to select the range of in which air direction can be adjusted in order to prevent the ceiling surrounding the air discharge outlet of ceiling mounted cassette type units from being soiled.

  • Page 79: Thermostat Sensor In Remote Controller

    Outline of Control (Indoor Unit) Si34-603 Thermostat Sensor in Remote Controller Temperature is controlled by both the thermostat sensor in remote controller and air suction thermostat in the indoor unit. (This is however limited to when the field setting for the thermostat sensor in remote controller is set to “Use.”...
  • Page 80 Si34-603 Outline of Control (Indoor Unit) Heating When heating, the hot air rises to the top of the room, resulting in the temperature being lower near the floor where the occupants are. When controlling by body thermostat sensor only, the unit may therefore be turned off by the thermostat before the lower part of the room reaches the preset temperature.

  • Page 81: Freeze Prevention

    Outline of Control (Indoor Unit) Si34-603 Freeze Prevention Freeze When the temperature detected by liquid pipe temperature thermistor (R2T) of the indoor unit heat exchanger drops too low, the unit enters freeze prevention operation in accordance with Prevention by Off the following conditions, and is also set in accordance with the conditions given below.

  • Page 82: View Of Operations Of Swing Flaps

    Si34-603 Outline of Control (Indoor Unit) View of Operations of Swing Flaps Swing flaps work as following. Flap control FXCQ FXFQ FXKQ FXAQ FXHQ Swinging Level Level Level Hot-start from defrosting Setting the wind direction Level Level Level Swinging Level Level Level Defrosting...

  • Page 83: Electronic Expansion Valve Control

    Outline of Control (Indoor Unit) Si34-603 Electronic Expansion Valve Control • Electronic expansion Valve Control In cooling, to maximize the capacity of indoor unit heat exchanger (evaporator), operate the electronic expansion valve under PI control so that the evaporator outlet superheated degree (SH) will become constant.

  • Page 84: Part 6 Test Operation

    Si34-603 Part 6 Test Operation Test Operation ..................74 Procedure and Outline ................74 Operation when Power is Turned On .............77 Outdoor Unit PC Board Layout .............78 Field Setting ..................79 Field Setting from Remote Controller .............79 Field Setting from Outdoor Unit..............92 Test Operation...

  • Page 85: Test Operation

    Test Operation Si34-603 Test Operation Procedure and Outline Follow the following procedure to conduct the initial test operation after installation. 1.1.1 Check Work Prior to Turn Power Supply On ¡ Is the power supply single-phase 220-230V / 50Hz, 220V / 60Hz? ¡...

  • Page 86: Check Operation

    Si34-603 Test Operation 1.1.3 Check Operation * During check operation, mount front panel to avoid the misjudging. * Check operation is mandatory for normal unit operation. (When the check operation is not executed, alarm code "U3" will be displayed.) ¡ Press and hold the TEST ...
  • Page 87 Test Operation Si34-603 1.1.4 Confirmation on Normal Operation • Conduct normal unit operation after the check operation has been completed. (When outdoor air temperature is 24°CDB or higher, the unit can not be operated with heating mode. See the installation manual attached.) •...

  • Page 88: Operation When Power Is Turned On

    Si34-603 Test Operation Operation when Power is Turned On 1.2.1 When Turning On Power First Time The unit cannot be run for up to 12 minutes to automatically set the master power and address (indoor-outdoor address, etc.). Status Outdoor unit Test lamp H2P ..

  • Page 89: Outdoor Unit Pc Board Layout

    Outdoor Unit PC Board Layout Si34-603 Outdoor Unit PC Board Layout Outdoor unit PC board Caution Cover electric parts with an insulating sheet during inspection to prevent electric shock. Test Operation...

  • Page 90: Field Setting

    Si34-603 Field Setting Field Setting Field Setting from Remote Controller Individual function of indoor unit can be changed from the remote controller. At the time of installation or after service inspection / repair, make the local setting in accordance with the following description.
  • Page 91 Field Setting Si34-603 3.1.2 Wireless Remote Controller - Indoor Unit BRC7C type BRC7E type BRC4C type 1. When in the normal mode, push the “ ” button for 4 seconds or more, and operation then enters the “field set mode.” 2.

  • Page 92: Simplified Remote Controller

    Si34-603 Field Setting 3.1.3 Simplified Remote Controller BRC2C51 1. Remove the upper part of remote controller. 2. When in the normal mode, press the [BS6] BUTTON ( ) (field set), and the FIELD SET MODE is entered. 3. Select the desired MODE No. with the [BS2] BUTTON ( ) (temperature setting ) and the [BS3] BUTTON ( ) (temperature setting ).
  • Page 93 Field Setting Si34-603 3.1.4 Setting Contents and Code No. – VRV Indoor Unit Mode Setting Setting Contents Second Code No.(Note 3) Switch system indoor Note 2 unit 10(20) Filter contamination heavy/ Super Light Approx. Heavy Approx. — — settings light (Setting for display long life 10,000 5,000...
  • Page 94 Si34-603 Field Setting 3.1.5 Applicable Range of Field Setting Ceiling mounted cassette type Slim Ceiling Ceiling Ceiling Wall Floor Concealed Ceiling Ceiling mounted mounted suspended mounted standing Floor suspended Multi flow Double Corner mounted built-in duct type type type type standing cassette flow...

  • Page 95: Detailed Explanation Of Setting Modes

    Field Setting Si34-603 3.1.6 Detailed Explanation of Setting Modes Filter Sign Setting If switching the filter sign ON time, set as given in the table below. Set Time Filter Specs. Standard Long Life Ultra Long Life Filter Setting Contamination Light 200 hrs.
  • Page 96 Si34-603 Field Setting Auto Restart after Power Failure Reset For the air conditioners with no setting for the function (same as factory setting), the units will be left in the stop condition when the power supply is reset automatically after power failure reset or the main power supply is turned on again after once turned off.
  • Page 97 Field Setting Si34-603 Air Flow Direction Setting Set the air flow direction of indoor units as given in the table below. (Set when optional air outlet blocking pad has been installed.) The second code No. is factory set to “01.” Setting Table Second Code Mode No.
  • Page 98 Si34-603 Field Setting Setting of Air Flow Direction Adjustment Range Make the following air flow direction setting according to the respective purpose. Setting Table Mode No. First Code No. Second Code No. Setting Upward (Draft prevention) 13 (23) Standard Downward (Ceiling soiling prevention) Air flow rate switching at discharge grille for field air flow rate switching When the optional parts (high performance filter, etc.) is installed, sets to change fan speed for...
  • Page 99 Field Setting Si34-603 3.1.7 Centralized Control Group No. Setting BRC1C Type In order to conduct the central remote control using the central remote controller and the unified ON/OFF controller, Group No. settings should be made by group using the operating remote controller.

  • Page 100: Group No. Setting Example

    Si34-603 Field Setting BRC7C Type Group No. setting by wireless remote controller for centralized control 1. When in the normal mode, push “ ” button for 4 seconds or more, and operation then BRC7E Type enters the “field set mode.” BRC4C Type 2.

  • Page 101: Contents Of Control Modes

    Field Setting Si34-603 3.1.8 Setting of Operation Control Mode from Remote Controller (Local Setting) The operation control mode is compatible with a variety of controls and operations by limiting the functions of the operation remote controller. Furthermore, operations such as remote controller ON/OFF can be limited in accordance with the combination conditions.
  • Page 102 Si34-603 Field Setting How to Select Whether operation by remote controller will be possible or not for turning on/off, controlling temperature or setting operation mode is selected and decided by the operation mode given on Operation Mode the right edge of the table below. Example ON by remote OFF by remote...

  • Page 103: Field Setting From Outdoor Unit

    Field Setting Si34-603 Field Setting from Outdoor Unit 3.2.1 Setting by Dip Switches The following field settings are made by dip switches on PC board. Dipswitch Setting item Description Setting Cool / Heat Used to set cool / heat change over setting by remote DS1-1 change over controller equipped with outdoor unit.
  • Page 104 Si34-603 Field Setting Caution DIP switch Setting after changing the main P.C.Board(A1P) to spare parts P.C.B. When you change the main P.C.Board(A1P) to spare parts P.C.B., please carry out the following setting. Please Attach the Capacity Setting Adapter corresponding to Capacity Class (ex. 112, 140, 160) in connector X51A. (See Below) Capacity Setting Adapter Capacity Class...
  • Page 105 Field Setting Si34-603 Setting by pushbutton switches The following settings are made by pushbutton switches on PC board. LED indication (Factory setting) MODE RETURN TEST RESET (V2760) There are the following three setting modes. Setting mode 1 (H1P off) Initial status (when normal) : Also indicates during “abnormal”. Setting mode 2 (H1P on) Used to modify the operating status and to set program addresses, etc.
  • Page 106 Si34-603 Field Setting a. “Setting mode 1” This mode is used to set and check the following items. 1. Set items ············ In order to make COOL/HEAT selection in a batch of outdoor unit group, change the setting. • COOL/HEAT selection (IND) ·····················Used to select COOL or HEAT by individual outdoor unit (factory set).
  • Page 107 Field Setting Si34-603 b. “Setting mode 2” Setting item Description Cool/heat unified Sets address for cool/heat unified operation. Push and hold the MODE (BS1) address button for 5 seconds and set to Low noise/demand Address for low noise/demand operation “Setting mode 2”. address Used to conduct test operation without making changes Test operation...
  • Page 108 Si34-603 Field Setting Setting item display C/H selection Setting condition display MODE TEST Demand Setting item noise Master Slave ∗ Factory set 8777777 ∗ Address Binary number 8777778 Cool / Heat Unified address (6 digits) 8788888 8777777 ∗ Address 8777778 Binary number Low noise/demand address...
  • Page 109 Field Setting Si34-603 Setting item display C/H selection Setting condition display MODE TEST Demand Setting item noise Master Slave ∗ Factory set Level 1 (outdoor fan with 8 step or lower) 8777778 8777787 ∗ 25 Low noise setting Level 2 (outdoor fan with 7 step or lower) Level 3 (outdoor fan with 6 step or lower) 8777877 About 20:00...
  • Page 110 Si34-603 Field Setting c. Monitor mode LED display Setting item Data display To enter the monitor mode, push the 9 7 7 7 7 7 7 Various setting See below MODE (BS1) button when in “Setting mode 1”. 9 7 7 7 7 7 8 C/H unified address 9 7 7 7 7 8 7 Low noise/demand address...
  • Page 111 Field Setting Si34-603 Push the SET button and match with the LEDs No. 1 - 15, push the RETURN button, and confirm the data for each setting. Data such as addresses and number of units is expressed as binary numbers; the two ways of expressing are as follows: The No.
  • Page 112 Si34-603 Field Setting 3.2.2 Cool / Heat Mode Switching There are the following 4 cool/heat switching modes. Set cool/heat separately for each outdoor unit system by indoor unit remote controller. Set cool/heat separately for each outdoor unit system by cool/heat switching remote controller.
  • Page 113 Field Setting Si34-603 Set Cool / Heat Separately for Each Outdoor Unit System by Cool/Heat Switching Remote Controller It does not matter whether or not there is outdoor - outdoor unit wiring. Set outdoor unit PC board DS1-1 to OUT (factory set). Set cool/heat switching to IND (individual) for “Setting mode 1”...
  • Page 114 Si34-603 Field Setting 3.2.3 Setting of Low Noise Operation and Demand Operation Setting of Low Noise Operation By connecting the external contact input to the low noise input of the outdoor unit external control adapter (optional), you can lower operating noise by 2-3 dB. When the low noise operation is carried out automatically at night (The external control adapter for outdoor unit is not required) 1.

  • Page 115: Image Of Operation

    Field Setting Si34-603 Setting of Demand Operation By connecting the external contact input to the demand input of the outdoor unit external control adapter (optional), the power consumption of unit operation can be saved suppressing the compressor operating condition. Set item Condition Content Demand...
  • Page 116 Si34-603 Field Setting Detailed Setting Procedure of Low Noise Operation and Demand Control 1. Setting mode 1 (H1P off) In setting mode 2, push the BS1 (MODE button) one time. → Setting mode 1 is entered and H1P off. During the setting mode 1 is displayed, “In low noise operation” and “In demand control” are displayed.
  • Page 117 Field Setting Si34-603 : ON : OFF : Blink Setting Setting Setting No. indication Setting No. indication Setting Setting contents indication (Initial setting) contents contents H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P External low noise / (Factory...
  • Page 118 Si34-603 Field Setting 3.2.4 Setting of Refrigerant Additional Charging Operation When the outdoor unit is stopped and the entire quantity of refrigerant cannot be charged from the stop valve on the liquid side, make sure to charge the remaining quantity of refrigerant using this procedure. If the refrigerant quantity is insufficient, the unit may malfunction.
  • Page 119 Field Setting Si34-603 3.2.5 Setting of Refrigerant Recovery Mode When carrying out the refrigerant collection on site, fully open the respective expansion valve of indoor and outdoor units All indoor and outdoor unit’s operation are prohibited. [Operation procedure] In “Setting Mode 2” with units in stop mode, set “B Refrigerant Recovery / Vacuuming mode” to ON.
  • Page 120 Si34-603 Field Setting 3.2.6 Setting of Vacuuming Mode In order to perform vacuuming operation at site, fully open the expansion valves of indoor and outdoor units and turn on some solenoid valves. [Operating procedure] In “Setting Mode 2” with units in stop mode, set “B Refrigerant Recovery / Vacuuming mode” to ON.
  • Page 121 Field Setting Si34-603 Test Operation...

  • Page 122: Part 7 Troubleshooting

    Si34-603 Part 7 Part 7 Part 7 Part 7 Troubleshooting Troubleshooting Troubleshooting Troubleshooting 1. Symptom-based Troubleshooting ............113 2. Troubleshooting by Remote Controller ..........116 2.1 The INSPECTION / TEST Button............116 2.2 Self-diagnosis by Wired Remote Controller .........117 2.3 Self-diagnosis by Wireless Remote Controller ........118 2.4 Operation of the Remote Controller’s Inspection / Test Operation Button ................120 2.5 Remote Controller Service Mode ............121...
  • Page 123 Si34-603 3.28 “JA” Outdoor Unit: Malfunction of High Pressure Sensor......163 3.29 “JC” Outdoor Unit: Malfunction of Low Pressure Sensor.......164 3.30 “L1” Outdoor Unit: Malfunction of PC Board ..........165 3.31 “L4” Outdoor Unit: Malfunction of Inverter Radiating Fin Temperature Rise ..........166 3.32 “L5”...

  • Page 124: Symptom-Based Troubleshooting

    Si34-603 Symptom-based Troubleshooting 1. Symptom-based Troubleshooting Symptom Supposed Cause Countermeasure The system does not start operation at all. Blowout of fuse(s) Turn Off the power supply and then replace the fuse(s). Cutout of breaker(s) • If the knob of any breaker is in its OFF position, turn ON the power supply.
  • Page 125 Symptom-based Troubleshooting Si34-603 Symptom Supposed Cause Countermeasure The system This symptom occurs The system is in preparation Wait for a period of approximately conducts fan immediately after turning ON mode of operation. 10 minutes. operation but not the power supply. cooling or heating operation.
  • Page 126 Si34-603 Symptom-based Troubleshooting Symptom Supposed Cause Countermeasure 12 Dust comes out Dust comes out from the Dust, which has deposited on the Normal operation. from the system. system when it restarts after inside of indoor unit, is blown out the stop for an extended period from the system.

  • Page 127: Troubleshooting By Remote Controller

    Troubleshooting by Remote Controller Si34-603 2. Troubleshooting by Remote Controller The INSPECTION / TEST Button The following modes can be selected by using the [Inspection/Test Operation] button on the remote control. Depress Inspection/Test Operation button for more than 4 seconds. Indoor unit settings can be made Service data can be obtained.

  • Page 128: Self-Diagnosis By Wired Remote Controller

    Si34-603 Troubleshooting by Remote Controller 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 129: Self-Diagnosis By Wireless Remote Controller

    Troubleshooting by Remote Controller Si34-603 Self-diagnosis by Wireless Remote Controller In the Case of If equipment stops due to a malfunction, the operation indicating LED on the light reception section flashes. BRC7C Type The malfunction code can be determined by following the procedure described below. (The BRC7E Type malfunction code is displayed when an operation error has occurred.
  • Page 130 Si34-603 Troubleshooting by Remote Controller The lower digit of the code changes as shown below when the UP and DOWN buttons are pressed. Troubleshooting...

  • Page 131: Operation Of The Remote Controller's Inspection / Test Operation Button

    Troubleshooting by Remote Controller Si34-603 Operation of the Remote Controller’s Inspection / Test Operation Button Unit Malfunction code Inspection Normal display (No display) Malfunction code blinks when a malfunction occurs. Inspection/test Push the button. operation Unit Example of capacity code display 0 7 1...

  • Page 132: Remote Controller Service Mode

    Si34-603 Troubleshooting by Remote Controller Remote Controller Service Mode How to Enter the Service Mode Service Mode 1. Select the mode No. Operation Set the desired mode No. with the button. (For wireless remote controller, Mode 43 only can be set.) Method 2.
  • Page 133 Troubleshooting by Remote Controller Si34-603 Mode Function Contents and operation method Remote controller display example Malfunction Display malfunction hysteresis. hysteresis display The history No. can be changed with the Unit 1 button. Malfunction code 2-U4 Malfunction code Hystory No: 1 - 9 1: Latest (VE007) Display of sensor...

  • Page 134: Remote Controller Self-Diagnosis Function

    Si34-603 Troubleshooting by Remote Controller Remote Controller Self-Diagnosis Function The remote controller switches are equipped with a self diagnosis function so that more appropriate maintenance can be carried out. If a malfunction occurs during operation, the operation lamp, malfunction code and display of malfunctioning unit No. let you know the contents and location of the malfunction.
  • Page 135 Troubleshooting by Remote Controller Si34-603 8: ON 7: OFF 9: Blink Malfunction Operation Inspection Unit No. Malfunction contents Page code lamp display Referred Indoor Unit Error of external protection device PC board defect, E PROM defect Malfunction of drain level control system (S1L) Fan motor (M1F) lock, overload Malfunction of swing flap motor (MA) Malfunction of moving part of electronic expansion...
  • Page 136 Si34-603 Troubleshooting by Remote Controller 8: ON 7: OFF 9: Blink Malfunction Operation Inspection Unit No. Malfunction contents Page code lamp display Referred Outdoor Unit Malfunction of power unit — Malfunction of transmission between inverter and control PC board High voltage of capacitor in main inverter circuit. Malfunction of inverter radiating fin temperature rise sensor System...
  • Page 137 Troubleshooting by Remote Controller Si34-603 Malfunction code indication by outdoor unit PC board <Monitor mode> Contents of malfunction Malfunction To enter the monitor mode, push the code MODE (BS1) button when in In-phase malfunction of DIII Net Detection of DIII Net “Setting mode 1”.
  • Page 138 Si34-603 Troubleshooting by Remote Controller 8: ON 7: OFF 9:Blink Confirmation of malfunction 1 Confirmation of malfunction 2 Confirmation of malfunction 3 Confirmation of malfunction 4 Malfunction code H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P ∗1 ∗1 ∗1...
  • Page 139 Troubleshooting by Remote Controller Si34-603 <Monitor mode> Contents of malfunction Malfunction To enter the monitor mode, push the code MODE (BS1) button when in Open phase/Power supply imbalance Imbalance of inverter power supply “Setting mode 1”. voltage Faulty temperature sensor of inverter Faulty thermistor of inverter fin radiation fin Gas shortage...
  • Page 140 Si34-603 Troubleshooting by Remote Controller 8: ON 7: OFF 9:Blink Confirmation of malfunction 1 Confirmation of malfunction 2 Confirmation of malfunction 3 Confirmation of malfunction 4 Malfunction code H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P ∗1 ∗1 Display of contents of...

  • Page 141: Troubleshooting By Indication On The Remote Controller

    Troubleshooting by Indication on the Remote Controller Si34-603 3. Troubleshooting by Indication on the Remote Controller “ A0 ” Indoor Unit: Error of External Protection Device Remote Controller Display Applicable All indoor unit models Models Method of Malfunction Detection Malfunction Decision Conditions Supposed...

  • Page 142: A1" Indoor Unit: Pc Board Defect

    Si34-603 Troubleshooting by Indication on the Remote Controller “ A1 ” Indoor Unit: PC Board Defect Remote Controller 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 E²PROM : Type of nonvolatile memory.

  • Page 143: A3" Indoor Unit: Malfunction Of Drain Level Control System (33H)

    Troubleshooting by Indication on the Remote Controller Si34-603 “ A3 ” Indoor Unit: Malfunction of Drain Level Control System (33H) Remote Controller Display Applicable FXCQ, FXFQ, FXKQ, FXSQ, FXMQ, FXHQ (Option), FXAQ (Option) Models Method of By float switch OFF detection Malfunction Detection Malfunction...
  • Page 144 Si34-603 Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Is power supply Provide 220~240V power 220~240V provided? supply. The float A short switch is connected to circuit connector is Connect either a short circuit...

  • Page 145: A6" Indoor Unit: Fan Motor (M1F) Lock, Overload

    Troubleshooting by Indication on the Remote Controller Si34-603 “ A6 ” Indoor Unit: Fan Motor (M1F) Lock, Overload Remote Controller Display Applicable All indoor unit models Models Method of Detection by failure of signal for detecting number of turns to come from the fan motor Malfunction Detection Malfunction...

  • Page 146: A7" Indoor Unit: Malfunction Of Swing Flap Motor (Ma)

    Si34-603 Troubleshooting by Indication on the Remote Controller “ A7 ” Indoor Unit: Malfunction of Swing Flap Motor (MA) Remote Controller Display Applicable FXCQ, FXKQ, FXHQ, FXUQ Models Method of Utilizes ON/OFF of the limit switch when the motor turns. Malfunction Detection Malfunction...
  • Page 147 Troubleshooting by Indication on the Remote Controller Si34-603 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Is power supply Provide 220~240V power 220~240V provided? supply. Indoor unit is a model equipped Replace indoor unit PC board.

  • Page 148: A9" Indoor Unit: Malfunction Of Moving Part Of Electronic Expansion Valve (20E)

    Si34-603 Troubleshooting by Indication on the Remote Controller “ A9 ” Indoor Unit: Malfunction of Moving Part of Electronic Expansion Valve (20E) Remote Controller Display Applicable All indoor unit models Models Method of Malfunction Detection Malfunction Decision Conditions Supposed Malfunction of moving part of electronic expansion valve Defect of indoor unit PC board Causes Defect of connecting cable...
  • Page 149 Troubleshooting by Indication on the Remote Controller Si34-603 ∗1: Coil check method for the moving part of the electronic expansion valve Discount the electronic expansion valve from the PC board and check the continuity between the connector pins. (Normal) Pin No. 1.

  • Page 150: Af" Indoor Unit: Drain Level Above Limit

    Si34-603 Troubleshooting by Indication on the Remote Controller “ AF ” Indoor Unit: Drain Level above Limit Remote Controller Display Applicable FXCQ, FXSQ, FXKQ, FXMQ, FXDQ Models Method of Water leakage is detected based on float switch ON/OFF operation while the compressor is in non-operation.

  • Page 151: Aj" Indoor Unit: Malfunction Of Capacity Determination Device

    Troubleshooting by Indication on the Remote Controller Si34-603 “ AJ ” Indoor Unit: Malfunction of Capacity Determination Device Remote controller display Applicable All indoor unit models 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 152: C4" Indoor Unit: Malfunction Of Thermistor (R2T) For Heat Exchanger

    Si34-603 Troubleshooting by Indication on the Remote Controller “ C4 ” Indoor Unit: Malfunction of Thermistor (R2T) for Heat Exchanger Remote Controller Display Applicable All indoor unit models Models Method of Malfunction detection is carried out by temperature detected by heat exchanger thermistor. Malfunction Detection Malfunction...

  • Page 153: 3.10 " C5 " Indoor Unit

    Troubleshooting by Indication on the Remote Controller Si34-603 3.10 “ C5 ” Indoor Unit: Malfunction of Thermistor (R3T) for Gas Pipes Remote Controller Display Applicable All indoor unit models Models Method of Malfunction detection is carried out by temperature detected by gas pipe thermistor. Malfunction Detection Malfunction...

  • Page 154: 3.11 " C9 " Indoor Unit

    Si34-603 Troubleshooting by Indication on the Remote Controller 3.11 “ C9 ” Indoor Unit: Malfunction of Thermistor (R1T) for Suction Air Remote Controller Display Applicable AII indoor unit models Models Method of Malfunction detection is carried out by temperature detected by suction air temperature thermistor.

  • Page 155: 3.12 " Ca " Indoor Unit

    Troubleshooting by Indication on the Remote Controller Si34-603 3.12 “ CA ” Indoor Unit: Malfunction of Thermistor for Discharge Remote Controller Display Applicable AII indoor unit models Models Method of Malfunction detection is carried out by temperature detected by discharge air temperature thermistor.

  • Page 156: Cj" Indoor Unit: Malfunction Of Thermostat Sensor In

    Si34-603 Troubleshooting by Indication on the Remote Controller 3.13 “ CJ ” Indoor Unit: Malfunction of Thermostat Sensor in Remote Controller Remote Controller Display Applicable AII indoor unit models Models Method of Malfunction detection is carried out by temperature detected by remote controller air temperature thermistor.

  • Page 157: E1" Outdoor Unit: Pc Board Defect

    Troubleshooting by Indication on the Remote Controller Si34-603 3.14 “ E1 ” Outdoor Unit: PC Board Defect Remote Controller Display Applicable RX(Y)MQ4~6P Models Method of Check data from E²PROM Malfunction Detection Malfunction When data could not be correctly received from the E²PROM E²PROM : Type of nonvolatile memory.

  • Page 158: E3" Outdoor Unit: Actuation Of High Pressure Switch

    Si34-603 Troubleshooting by Indication on the Remote Controller 3.15 “ E3 ” Outdoor Unit: Actuation of High Pressure Switch Remote Controller Display Applicable RX(Y)MQ4~6P Models Method of Abnormality is detected when the contact of the high pressure protection switch opens. Malfunction Detection Malfunction...
  • Page 159 Troubleshooting by Indication on the Remote Controller Si34-603 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check for the points shown below. Is the stop valve open? Is the HPS connector properly connected to the main PCB? Does the high pressure switch have continuity? Are the...

  • Page 160: E4" Outdoor Unit: Actuation Of Low Pressure Sensor

    Si34-603 Troubleshooting by Indication on the Remote Controller 3.16 “ E4 ” Outdoor Unit: Actuation of Low Pressure Sensor Remote Controller Display Applicable RXYMQ4~6P Models Method of Abnormality is detected by the pressure value with the low pressure sensor. Malfunction Detection Malfunction Error is generated when the low pressure is dropped under specific pressure.
  • Page 161 Troubleshooting by Indication on the Remote Controller Si34-603 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Is the stop Open the stop valve. valve open? Mount a pressure gauge on the low-pressure service port. Connect the Service Checker.

  • Page 162: Compressor Motor Lock

    Si34-603 Troubleshooting by Indication on the Remote Controller 3.17 “ E5 ” Compressor Motor Lock Remote Controller Display Applicable RX(Y)MQ4~6P Models Method of Inverter PC board takes the position signal from UVW line connected between the inverter and compressor, and the malfunction is detected when any abnormality is observed in the phase- Malfunction current waveform.

  • Page 163: Malfunction Of Outdoor Unit Fan Motor

    Troubleshooting by Indication on the Remote Controller Si34-603 “ E7 ” 3.18 Malfunction of Outdoor Unit Fan Motor Remote Controller Display Applicable RX(Y)MQ4~6P Models Method of Malfunction of fan motor system is detected according to the fan speed detected by hall IC when the fan motor runs.

  • Page 164: E9" Outdoor Unit: Malfunction Of Moving Part Of

    Si34-603 Troubleshooting by Indication on the Remote Controller 3.19 “ E9 ” Outdoor Unit: Malfunction of Moving Part of Electronic Expansion Valve (Y1E, Y3E) Remote Controller Display Applicable RX(Y)MQ4~6P Models Method of Check disconnection of connector Check continuity of expansion valve coil Malfunction Detection Malfunction...
  • Page 165 Troubleshooting by Indication on the Remote Controller Si34-603 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Turn power supply off, and turn power supply on again. Return to normal? External factor other than malfunction (for example, noise etc.).

  • Page 166: F3" Outdoor Unit: Abnormal Discharge Pipe Temperature

    Si34-603 Troubleshooting by Indication on the Remote Controller 3.20 “ F3 ” Outdoor Unit: Abnormal Discharge Pipe Temperature Remote Controller Display Applicable RX(Y)MQ4~6P Models Method of Abnormality is detected according to the temperature detected by the discharge pipe temperature sensor. Malfunction Detection Malfunction...

  • Page 167: Outdoor Unit: Refrigerant Overcharged

    Troubleshooting by Indication on the Remote Controller Si34-603 3.21 “ F6 ” Outdoor Unit: Refrigerant Overcharged Remote Controller Display Applicable RX(Y)MQ4~6P Models Method of Excessive charging of refrigerant is detected by using the heat exchanging deicer temperature during a check operation. Malfunction Detection Malfunction...

  • Page 168: 3.22 " H9 " Outdoor Unit

    Si34-603 Troubleshooting by Indication on the Remote Controller 3.22 “ H9 ” Outdoor Unit: Malfunction of Thermistor (R1T) for Outdoor Air Remote Controller Display Applicable RX(Y)MQ4~6P Models Method of Malfunction is detected from the temperature detected by the outdoor air thermistor. Malfunction Detection Malfunction...

  • Page 169: 3.23 " J3 " Outdoor Unit

    Troubleshooting by Indication on the Remote Controller Si34-603 3.23 “ J3 ” Outdoor Unit: Malfunction of Discharge Pipe Thermistor (R2T) Remote Controller Display Applicable RX(Y)MQ4~6P Models Method of Malfunction is detected from the temperature detected by discharge pipe temperature thermistor. Malfunction Detection Malfunction...

  • Page 170: 3.24 " J5 " Outdoor Unit

    Si34-603 Troubleshooting by Indication on the Remote Controller 3.24 “ J5 ” Outdoor Unit: Malfunction of Thermistor (R3T, R5T) for Suction Pipe 1, 2 Remote Controller Display Applicable RX(Y)MQ4~6P Models Method of Malfunction is detected from the temperature detected by the thermistor for suction pipe 1, 2. Malfunction Detection Malfunction...

  • Page 171: J6" Outdoor Unit: Malfunction Of Thermistor (R4T) For

    Troubleshooting by Indication on the Remote Controller Si34-603 3.25 “ J6 ” Outdoor Unit: Malfunction of Thermistor (R4T) for Outdoor Unit Heat Exchanger Remote Controller Display Applicable RX(Y)MQ4~6P Models Method of Malfunction is detected from the temperature detected by the heat exchanger thermistor. Malfunction Detection Malfunction...

  • Page 172: 3.26 " J7 " Outdoor Unit

    Si34-603 Troubleshooting by Indication on the Remote Controller 3.26 “ J7 ” Outdoor Unit: Malfunction of Thermistor (R7T) for Outdoor Unit Liquid Pipe Remote Controller Display Applicable RX(Y)MQ4~6P Models Method of Malfunction is detected from the temperature detected by the liquid pipe thermistor. Malfunction Detection Malfunction...

  • Page 173: J9" Outdoor Unit: Malfunction Of Subcooling Heat

    Troubleshooting by Indication on the Remote Controller Si34-603 3.27 “ J9 ” Outdoor Unit: Malfunction of Subcooling Heat Exchanger Gas Pipe Thermistor (R6T) Remote Controller Display Applicable RX(Y)MQ4~6P Models Method of Malfunction is detected according to the temperature detected by subcooling heat exchanger gas pipe thermistor.

  • Page 174: 3.28 " Ja " Outdoor Unit

    Si34-603 Troubleshooting by Indication on the Remote Controller 3.28 “ JA ” Outdoor Unit: Malfunction of High Pressure Sensor Remote Controller Display Applicable RX(Y)MQ4~6P Models Method of Malfunction is detected from the pressure detected by the high pressure sensor. Malfunction Detection Malfunction When the high pressure sensor is short circuit or open circuit.

  • Page 175: Jc" Outdoor Unit: Malfunction Of Low Pressure Sensor

    Troubleshooting by Indication on the Remote Controller Si34-603 3.29 “ JC ” Outdoor Unit: Malfunction of Low Pressure Sensor Remote Controller Display Applicable RX(Y)MQ4~6P Models Method of Malfunction is detected from pressure detected by low pressure sensor. Malfunction Detection Malfunction When the low pressure sensor is short circuit or open circuit.

  • Page 176: L1" Outdoor Unit: Malfunction Of Pc Board

    Si34-603 Troubleshooting by Indication on the Remote Controller 3.30 “ L1 ” Outdoor Unit: Malfunction of PC Board Remote Controller Display Applicable RX(Y)MQ4~6P Models Method of Detect malfunctions by current value during waveform output before compressor startup. Detect malfunctions by current sensor value during synchronized operation at the time of Malfunction startup.

  • Page 177: 3.31 " L4 " Outdoor Unit

    Troubleshooting by Indication on the Remote Controller Si34-603 3.31 “ L4 ” Outdoor Unit: Malfunction of Inverter Radiating Fin Temperature Rise Remote Controller Display Applicable RX(Y)MQ4~6P Models Method of Fin temperature is detected by the thermistor of the radiation fin. Malfunction Detection Malfunction...

  • Page 178: L5" Outdoor Unit: Inverter Compressor Abnormal

    Si34-603 Troubleshooting by Indication on the Remote Controller 3.32 “ L5 ” Outdoor Unit: Inverter Compressor Abnormal Remote Controller Display Applicable RX(Y)MQ4~6P Models Method of Malfunction is detected from current flowing in the power transistor. Malfunction Detection Malfunction When an excessive current flows in the power transistor. (Instantaneous overcurrent also causes activation.) Decision Conditions...

  • Page 179: L8" Outdoor Unit: Inverter Current Abnormal

    Troubleshooting by Indication on the Remote Controller Si34-603 3.33 “ L8 ” Outdoor Unit: Inverter Current Abnormal Remote Controller Display Applicable RX(Y)MQ4~6P Models Method of Malfunction is detected by current flowing in the power transistor. Malfunction Detection Malfunction When overload in the compressor is detected. Decision Conditions Supposed...

  • Page 180: L9" Outdoor Unit: Inverter Start Up Error

    Si34-603 Troubleshooting by Indication on the Remote Controller 3.34 “ L9 ” Outdoor Unit: Inverter Start up Error Remote Controller Display Applicable RX(Y)MQ4~6P Models Method of Malfunction is detected from current flowing in the power transistor. Malfunction Detection Malfunction When overload in the compressor is detected during startup Decision Conditions Supposed...

  • Page 181: 3.35 " Lc " Outdoor Unit

    Troubleshooting by Indication on the Remote Controller Si34-603 3.35 “ LC ” Outdoor Unit: Malfunction of Transmission between Inverter and Control PC Board Remote Controller Display Applicable RX(Y)MQ4~6P Models Method of Check the communication state between inverter PC board and control PC board by micro- computer.

  • Page 182: 3.36 " P1 " Outdoor Unit

    Si34-603 Troubleshooting by Indication on the Remote Controller 3.36 “ P1 ” Outdoor Unit: High Voltage of Capacitor in Main Inverter Circuit Remote Controller Display Applicable RX(Y)MQ4~6P Models Method of Malfunction is detected according to the voltage waveform of main circuit capacitor built in the inverter.

  • Page 183: P4" Outdoor Unit: Malfunction Of Inverter Radiating Fin

    Troubleshooting by Indication on the Remote Controller Si34-603 3.37 “ P4 ” Outdoor Unit: Malfunction of Inverter Radiating Fin Temperature Rise Sensor Remote Controller Display Applicable RX(Y)MQ4~6P Models Method of Resistance of radiation fin thermistor is detected when the compressor is not operating. Malfunction Detection Malfunction...

  • Page 184: 3.38 " Uo " Outdoor Unit

    Si34-603 Troubleshooting by Indication on the Remote Controller 3.38 “ UO ” Outdoor Unit: Low Pressure Drop Due to Refrigerant Shortage or Electronic Expansion Valve Failure Remote Controller Display Applicable RX(Y)MQ4~6P Models Method of Short of gas malfunction is detected by discharge pipe temperature thermistor and low pressure saturation temperature.
  • Page 185 Troubleshooting by Indication on the Remote Controller Si34-603 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Low pressure Cooling Out of gas, closing of stop is 0.25 MPa or less.

  • Page 186: Power Supply Insufficient Or Instantaneous Failure

    Si34-603 Troubleshooting by Indication on the Remote Controller 3.39 “ U2 ” Power Supply Insufficient or Instantaneous Failure Remote Controller Display Applicable RX(Y)MQ4~6P Models Method of Detection of voltage of main circuit capacitor built in the inverter and power supply voltage. Malfunction Detection Malfunction...
  • Page 187 Troubleshooting by Indication on the Remote Controller Si34-603 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Is the power supply voltage Correct power supply 200~240V ±10%? Is the P-N resistance not less than Field factors several hundred of...

  • Page 188: Check Operation Not Executed

    Si34-603 Troubleshooting by Indication on the Remote Controller “ U3 ” 3.40 Check Operation not Executed Remote Controller Display Applicable RX(Y)MQ4~6P Models Method of Check operation is executed or not Malfunction Detection Malfunction Malfunction is decided when the unit starts operation without check operation. Decision Conditions Supposed...

  • Page 189: Malfunction Of Transmission Between Indoor Units And Outdoor Units

    Troubleshooting by Indication on the Remote Controller Si34-603 3.41 “ U4 ” Malfunction of Transmission between Indoor Units and Outdoor Units Remote Controller Display Applicable AII indoor unit models RX(Y)MQ4~6P Models Method of Microcomputer checks if transmission between indoor and outdoor units is normal. Malfunction Detection Malfunction...
  • Page 190 Si34-603 Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. the indoor or outdoor unit PC board been replaced, or has the indoor - outdoor Push and hold the RESET or outdoor - outdoor unit button on the master outdoor...

  • Page 191: U5" Malfunction Of Transmission Between Remote Controller

    Troubleshooting by Indication on the Remote Controller Si34-603 3.42 “ U5 ” Malfunction of Transmission between Remote Controller and Indoor Unit Remote Controller Display Applicable AII indoor unit models Models Method of In case of controlling with 2-remote controller, check the system using microcomputer is signal transmission between indoor unit and remote controller (main and sub) is normal.

  • Page 192: Malfunction Of Transmission Between Main And Sub Remote Controllers

    Si34-603 Troubleshooting by Indication on the Remote Controller 3.43 “ U8 ” Malfunction of Transmission between Main and Sub Remote Controllers Remote Controller Display Applicable AII indoor unit models Models Method of In case of controlling with 2-remote controller, check the system using microcomputer if signal transmission between indoor unit and remote controller (main and sub) is normal.

  • Page 193: Malfunction Of Transmission Between Indoor And Outdoor Units In The Same System

    Troubleshooting by Indication on the Remote Controller Si34-603 3.44 “ U9 ” Malfunction of Transmission between Indoor and Outdoor Units in the Same System Remote Controller Display Applicable AII indoor unit models Models Method of Malfunction Detection Malfunction Decision Conditions Supposed Malfunction of transmission within or outside of other system Malfunction of electronic expansion valve in indoor unit of other system...
  • Page 194 Si34-603 Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. "U9" has been displayed for 2 Re-diagnose by display after minutes or more. passage of 2 minutes or more.

  • Page 195: Excessive Number Of Indoor Units

    Troubleshooting by Indication on the Remote Controller Si34-603 3.45 “ UA ” Excessive Number of Indoor Units Remote Controller Display Applicable AII indoor unit models Models Method of Malfunction Detection Malfunction Decision Conditions Supposed Excess of connected indoor units Defect of outdoor unit PC board (A1P) Causes Mismatching of the refrigerant type of indoor and outdoor unit.

  • Page 196: Address Duplication Of Central Remote Controller

    Si34-603 Troubleshooting by Indication on the Remote Controller 3.46 “ UC ” Address Duplication of Central Remote Controller Remote Controller Display Applicable AII indoor unit models Models Method of Malfunction Detection Malfunction Decision Conditions Supposed Address duplication of centralized remote controller Defect of indoor unit PC board Causes Troubleshooting...

  • Page 197: Malfunction Of Transmission Between Central Remote Controller And Indoor Unit

    Troubleshooting by Indication on the Remote Controller Si34-603 3.47 “ UE ” Malfunction of Transmission between Central Remote Controller and Indoor Unit Remote Controller Display Applicable AII indoor unit models Centralized controller Models Method of Microcomputer checks if transmission between indoor unit and centralized remote controller is normal.
  • Page 198 Si34-603 Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. an indoor unit once connected been remove Reset power supply or its address simultaneously for all optional changed? controllers for centralized...

  • Page 199: System Is Not Set Yet

    Troubleshooting by Indication on the Remote Controller Si34-603 3.48 “ UF ” System is not Set yet Remote Controller Display Applicable All models of indoor units Models RX(Y)MQ4~6P Method of On check operation, the number of indoor units in terms of transmission is not corresponding to that of indoor units that have made changes in temperature.

  • Page 200: Uh" Malfunction Of System, Refrigerant System Address Undefined

    Si34-603 Troubleshooting by Indication on the Remote Controller 3.49 “ UH ” Malfunction of System, Refrigerant System Address Undefined Remote Controller Display Applicable AII indoor unit models RX(Y)MQ4~6P Models Method of Malfunction Detection Malfunction Decision Conditions Supposed Improper connection of transmission wiring between outdoor unit and outdoor unit outside control adaptor Causes Defect of indoor unit PC board...

  • Page 201: Troubleshooting By Indication On The Centralized Remote Controller

    Troubleshooting by Indication on the Centralized Remote Controller Si34-603 Troubleshooting by Indication on the Centralized Remote Controller “ UE ” Malfunction of Transmission between Centralized Remote Controller and Indoor Unit Remote Controller Display Applicable AII indoor unit models Centralized Remote Controller Models Method of Microcomputer checks if transmission between indoor unit and central remote controller is...

  • Page 202: Pc Board Defect

    Si34-603 Troubleshooting by Indication on the Centralized Remote Controller “ M1 ” PC Board Defect Remote Controller Display Applicable Centralized remote controller Models Method of Malfunction Detection Malfunction Decision Conditions Supposed Defect of central remote controller PC board Causes Troubleshooting Replace the central remote controller PC board.

  • Page 203: Malfunction Of Transmission Between Optional Controllers For Centralized Control

    Troubleshooting by Indication on the Centralized Remote Controller Si34-603 “ M8 ” Malfunction of Transmission between Optional Controllers for Centralized Control Remote Controller Display Applicable Centralized remote controller Models Method of Malfunction Detection Malfunction Decision Conditions Supposed Malfunction of transmission between optional controllers for centralized control Defect of PC board of optional controllers for centralized control Causes Troubleshooting...

  • Page 204: Improper Combination Of Optional Controllerslers For Centralized Controllers

    Si34-603 Troubleshooting by Indication on the Centralized Remote Controller “ MA ” Improper Combination of Optional Controllers for Centralized Control Remote Controller Display Applicable Centralized remote controller Models Method of Malfunction Detection Malfunction Decision Conditions Supposed Improper combination of optional controllers for centralized control More than one master controller is connected Causes Defect of PC board of optional controller for centralized control...
  • Page 205 Troubleshooting by Indication on the Centralized Remote Controller Si34-603 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Cannot be used in combination with a wiring the wiring adaptor for adaptor for electrical electrical appendices appendices.

  • Page 206: Mc" Address Duplication, Improper Setting

    Si34-603 Troubleshooting by Indication on the Centralized Remote Controller “ MC ” Address Duplication, Improper Setting Remote Controller Display Applicable Centralized remote controller Models Method of Malfunction Detection Malfunction Decision Conditions Supposed Address duplication of centralized remote controller Causes Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred.

  • Page 207: Troubleshooting By Indication On The Unified On/Off Controller

    Troubleshooting by Indication on the Unified ON/OFF Controller Si34-603 Troubleshooting by Indication on the Unified ON/ OFF Controller Operation Lamp Blinks Remote Operation lamp blinks Controller Display Applicable All models of indoor units Unified ON/OFF controller Models Method of Malfunction Detection Malfunction Decision...
  • Page 208 Si34-603 Troubleshooting by Indication on the Unified ON/OFF Controller Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Is a malfunction code displayed on the Diagnose the cause with the remote controller? air conditioner's failure diagnosis manual.

  • Page 209: Display "Under Host Computer Integrate Control" Blinks (Repeats Single Blink)

    Troubleshooting by Indication on the Unified ON/OFF Controller Si34-603 Display “Under Host Computer Integrate Control” Blinks (Repeats Single Blink) Remote “under host computer integrated control” (Repeats single blink) Controller Display Applicable Unified ON/OFF controller Central controller, Schedule timer Models Method of Malfunction Detection Malfunction...
  • Page 210 Si34-603 Troubleshooting by Indication on the Unified ON/OFF Controller Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Has a once connected optional controller for centralized Reset power supply control been disconnected simultaneously for all optional or itsaddress...
  • Page 211 Troubleshooting by Indication on the Unified ON/OFF Controller Si34-603 Is the wiring adaptor for Cannot be used in electrical appendices combination with a wiring connected? adaptor for electrical appendices. Remove the wiring adaptor for electrical appendices and reset the power supply for all optional controllers for centralized control simultaneously.

  • Page 212: Display "Under Host Computer Integrate Control" Blinks (Repeats Double Blink)

    Si34-603 Troubleshooting by Indication on the Unified ON/OFF Controller Display “Under Host Computer Integrate Control” Blinks (Repeats Double Blink) Remote “under host computer integrated control” (Repeats double blink) Controller Display Applicable Unified ON/OFF controller Models Method of Malfunction Detection Malfunction Decision Conditions Supposed...

  • Page 213: Troubleshooting

    Troubleshooting by Indication on the Unified ON/OFF Controller Si34-603 [CHECK 1] Check for causes of rise in high pressure Referring to the Fault Tree Analysis (FTA) shown below, probe the faulty points. ←Check to be sure the stop valve is open. Stop valve closed Local High pipe...
  • Page 214 Si34-603 Troubleshooting by Indication on the Unified ON/OFF Controller [CHECK 2] Check for causes of drop in low pressure Referring to the Fault Tree Analysis (FTA) shown below, probe the faulty points. [In cooling] ←Are the electrical characteristics normal? Faulty low pressure sensor (See *1.) Faulty compressor...
  • Page 215 Troubleshooting by Indication on the Unified ON/OFF Controller Si34-603 [CHECK 3] Check for Fan Motor Connector (1) Turn the power supply off. (2) With the fan motor connector disconnected, measure the resistance between each pin, then make sure that the resistance is more than the value mentioned in the following table. 1 White Measurement point Judgment...

  • Page 216: Part 8 Appendix

    Si34-603 Part 8 Part 8 Part 8 Part 8 Appendix Appendix Appendix Appendix 1. Piping Diagrams..................206 1.1 Outdoor Unit ..................206 1.2 Indoor Unit....................207 2. Wiring Diagrams..................210 2.1 Outdoor Unit ..................210 2.2 Field Wiring ..................212 2.3 Indoor Unit....................213 3. Option List ...................226 3.1 Option List of Controllers..............226 3.2 Option List of Outdoor Unit..............228 4.

  • Page 217: Piping Diagrams

    Piping Diagrams Si34-603 1. Piping Diagrams Outdoor Unit RX(Y)MQ4 / 5 / 6PVE Appendix...

  • Page 218: Indoor Unit

    Si34-603 Piping Diagrams Indoor Unit FXCQ, FXFQ, FXKQ, FXSQ, FXMQ, FXHQ, FXAQ, FXLQ, FXNQ Gas piping connection port Heat exchanger Flare connection : φ15.9 or less Attached piping : Above φ19.1 Liquid piping connection port (Flare connection) Electronic Filter Filter expansion valve DU220-602J Code...
  • Page 219 Piping Diagrams Si34-603 FXDQ 4D043864H Refrigerant pipe connection port diameters (mm) Model Liquid FXDQ20N(A), P / 25N(A), P / 32N(A), P / φ12.7 φ6.4 40N(A) / 50N(A)VE(T) φ15.9 φ9.5 FXDQ63N(A)VE(T) Appendix...
  • Page 220 Si34-603 Piping Diagrams FXUQ + BEVQ Indoor Unit 4D037995F Connection Unit 4D034127B Appendix...

  • Page 221: Wiring Diagrams

    Wiring Diagrams Si34-603 2. Wiring Diagrams Outdoor Unit 2.1.1 Heat Pump RXYMQ4 / 5 / 6PVE Appendix...

  • Page 222: Cooling Only

    Si34-603 Wiring Diagrams 2.1.2 Cooling Only RXMQ4 / 5 / 6PVE Appendix...

  • Page 223: Field Wiring

    Wiring Diagrams Si34-603 Field Wiring RX(Y)MQ4 / 5 / 6PVE Appendix...

  • Page 224: Indoor Unit

    Si34-603 Wiring Diagrams Indoor Unit FXCQ20M / 25M / 32M / 63MVE Appendix...
  • Page 225 Wiring Diagrams Si34-603 FXCQ40M / 50M / 80M/ 125MVE Appendix...
  • Page 226 Si34-603 Wiring Diagrams FXFQ25M / 32M / 40M / 50M / 63M / 80M / 100M / 125MVE Appendix...
  • Page 227 Wiring Diagrams Si34-603 FXKQ25MA / 32MA / 40MA / 63MAVE Appendix...
  • Page 228 Si34-603 Wiring Diagrams FXDQ20P / 25P / 32P FXDQ20NA / 25NA / 32NA / 40NA / 50NA / 63NAVE (with Drain Pump) Appendix...
  • Page 229 Wiring Diagrams Si34-603 FXDQ20P / 25P / 32P FXDQ20N / 25N / 32N / 40N / 50N / 63NAVET (without Drain Pump) Appendix...
  • Page 230 Si34-603 Wiring Diagrams FXSQ20M / 25M / 32M / 40M / 50M / 63M / 80M / 100M / 125MVE Appendix...
  • Page 231 Wiring Diagrams Si34-603 FXMQ40MA / 50MA / 63MA / 80MA / 100MA / 125MAVE Appendix...
  • Page 232 Si34-603 Wiring Diagrams FXHQ32MA / 63MA / 100MAVE Appendix...
  • Page 233 Wiring Diagrams Si34-603 FXAQ20MA / 25MA / 32MAVE / 40MA / 50MA / 63MAVE Appendix...
  • Page 234 Si34-603 Wiring Diagrams FXLQ20MA / 25MA / 32MA / 40MA / 50MA / 63MAVE FXNQ20MA / 25MA / 32MA / 40MA / 50MA / 63MAVE Appendix...
  • Page 235 Wiring Diagrams Si34-603 FXUQ71MA / 100MA / 125MAV1 Appendix...
  • Page 236 Si34-603 Wiring Diagrams BEVQ71MA / 100MA / 125MAVE 3D044901B Appendix...

  • Page 237: Option List

    Option List Si34-603 Option List Option List of Controllers Operation Control System Optional Accessories Type FXDQ-N(A) FXLQ-MA FXCQ-M FXFQ-M FXKQ-MA FXUQ-MA FXSQ-M FXMQ-MA FXHQ-MA FXAQ-MA FXDQ-P FXNQ-MA Item Wireless BRC7C62 BRC7E61W BRC4C61 BRC4C62 BRC7C528W BRC4C62 BRC7E63W BRC7E618 BRC4C62 Remote controller Wired BRC1C62 Wired remote controller...
  • Page 238 Si34-603 Option List Building management system Part name Model No. Function intelligent • Air-Conditioning management system that can be controlled by a basic Hardware Touch DCS601C51 compact all-in-one unit. Controller DIII-NET Hardware plus DCS601A52 • Additional 64 groups (10 outdoor units) is possible. adaptor Option P.P.D.

  • Page 239: Option List Of Outdoor Unit

    Option List Si34-603 Option List of Outdoor Unit RX(Y)MQ4 / 5 / 6P RXYMQ4PVE, RXMQ4PVE Optional accessories RXYMQ5PVE, RXMQ5PVE RXYMQ6PVE, RXMQ6PVE Cool/Heat Selector KRC19-26A Fixing box KJB111A KHRP26M22H, KHRP26M33H Refnet header (MAX. 4 branch) (MAX. 8 branch) Refnet joint KHRP26M22T Central drain plug KKPJ5F180 Fixture for preventing overturning...

  • Page 240: Example Of Connection

    Si34-603 Example of Connection 4. Example of Connection Branch with refnet joint Branch with refnet joint and refnet header Example of connection Branch with refnet header (Connection of 8 indoor units REFNET joint (A-G) REFNET joint (A • B) Outdoor unit Refnet header Outdoor unit Outdoor unit...
  • Page 241 Example of Connection Si34-603 Appendix...

  • Page 242: Thermistor Resistance / Temperature Characteristics

    Si34-603 Thermistor Resistance / Temperature Characteristics Thermistor Resistance / Temperature Characteristics Indoor unit For air suction For liquid pipe For gas pipe Outdoor unit For outdoor air Outdoor unit for fin thermistor For suction pipe 1 For heat exchanger For suction pipe 2 For Subcooling heat exchanger outlet R6T For Liquid pipe (kΩ)
  • Page 243 Thermistor Resistance / Temperature Characteristics Si34-603 Outdoor Unit Thermistors for Discharge Pipe (R2T) (kΩ) T°C T°C T°C 640.44 624.65 72.32 70.96 13.35 13.15 609.31 594.43 69.64 68.34 12.95 12.76 579.96 565.78 67.06 65.82 12.57 12.38 552.00 538.63 64.60 63.41 12.20 12.01 525.63 512.97...

  • Page 244: Pressure Sensor

    Si34-603 Pressure Sensor Pressure Sensor = 1.38V-0.69 : Detected Pressure [High Side] MPa = 0.57V-0.28 : Detected Pressure [Low Side] MPa : High pressure (MPa) : Output Voltage [High Side] V Detected Pressure : Low pressure (MPa) : Output Voltage [Low Side] V V : Voltage (V) High Pressure (P Low Pressure (P...

  • Page 245: Method Of Replacing The Inverter's Power Transistors Modules

    Method of Replacing the Inverter’s Power Transistors Modules Si34-603 Method of Replacing the Inverter’s Power Transistors Modules Checking failures in power semiconductors mounted on inverter PC board Check the power semiconductors mounted on the inverter PC board by the use of a multiple tester.
  • Page 246 Si34-603 Method of Replacing the Inverter’s Power Transistors Modules Power module checking When using the digital type of multiple tester, make measurement in diode check mode. Tester terminal Criterion Remark Not less than 0.3V It may take time to (including ∞)* determine the voltage due to capacitor charge or else.
  • Page 247 Method of Replacing the Inverter’s Power Transistors Modules Si34-603 Appendix...

  • Page 248: Part 9 Precautions For New Refrigerant (R-410A)

    Si34-603 Part 9 Precautions for New Precautions for New Precautions for New Precautions for New Refrigerant (R-410A) Refrigerant (R-410A) Refrigerant (R-410A) Refrigerant (R-410A) 1. Precautions for New Refrigerant (R-410A) .........238 1.1 Outline ....................238 1.2 Refrigerant Cylinders................240 1.3 Service Tools..................241 Precautions for New Refrigerant (R-410A)

  • Page 249: Precautions For New Refrigerant (R-410A)

    Precautions for New Refrigerant (R-410A) Si34-603 Precautions for New Refrigerant (R-410A) Outline 1.1.1 About Refrigerant R-410A Characteristics of new refrigerant, R-410A 1. Performance Almost the same performance as R-22 and R-407C 2. Pressure Working pressure is approx. 1.4 times more than R-22 and R-407C. 3.
  • Page 250 Si34-603 Precautions for New Refrigerant (R-410A) Thermodynamic characteristic of R-410A Temperature Steam pressure Density Specific heat at constant Specific enthalpy Specific entropy (kPa) (kg/m pressure (kJ/kgK) (kJ/kg) (kJ/KgK) Liquid Vapor Liquid Vapor Liquid Vapor Liquid Vapor Liquid Vapor Precautions for New Refrigerant (R-410A)

  • Page 251: Refrigerant Cylinders

    Precautions for New Refrigerant (R-410A) Si34-603 Refrigerant Cylinders Cylinder specifications 2 The cylinder is painted refrigerant color (pink). 2 The cylinder valve is equipped with a siphon tube. Cylinder Refrigerant can be charged in liquid state with cylinder in upright position. Caution: Do not lay cylinder on its side during charging, since it cause refrigerant in gas state to enter the system.

  • Page 252: Service Tools

    Si34-603 Precautions for New Refrigerant (R-410A) Service Tools R-410A is used under higher working pressure, compared to previous refrigerants (R-22,R-407C). Furthermore, the refrigerating machine oil has been changed from Suniso oil to Ether oil, and if oil mixing is occurred, sludge results in the refrigerants and causes other problems.
  • Page 253 Precautions for New Refrigerant (R-410A) Si34-603 1. Flaring tool Flare gauge Specifications 2 Dimension A Unit:mm Tube O.D. −0.4 Nominal size Class-2 (R-410A) Class-1 (Conventional) 6.35 9.52 13.2 13.0 12.70 16.6 16.2 15.88 19.7 19.4 19.05 24.0 23.3 Differences 2 Change of dimension A Dimension A For class-1: R-407C For class-2: R-410A...
  • Page 254 Si34-603 Precautions for New Refrigerant (R-410A) 2. Torque wrench Specifications 2 Dimension B Unit:mm Nominal size Class-1 Class-2 Previous No change in tightening torque No change in pipes of other sizes Differences 2 Change of dimension B Only 1/2", 5/8" are extended For class-1: R-407C For class-2: R-410A Dimension B...
  • Page 255 Precautions for New Refrigerant (R-410A) Si34-603 4. Leak tester Specifications 2 Hydrogen detecting type, etc. 2 Applicable refrigerants R-410A, R-407C, R-404A, R-507A, R-134a, etc. Differences 2 Previous testers detected chlorine. Since HFCs do not contain chlorine, new tester detects hydrogen. 5.
  • Page 256 Si34-603 Precautions for New Refrigerant (R-410A) 2 Temperature scale indicates the relationship between pressure and temperature in gas saturated state. Differences 2 Change in pressure 2 Change in service port diameter 7. Charge hose for R-410A (Hose with ball valve) Specifications 2 Working pressure 5.08 MPa (51.8 kg/cm 2 Rupture pressure 25.4 MPa (259 kg/cm...
  • Page 257 Precautions for New Refrigerant (R-410A) Si34-603 9. Weigher for refrigerant charge Specifications 2 High accuracy TA101A (for 10-kg cylinder) = ± 2g TA101B (for 20-kg cylinder) = ± 5g 2 Equipped with pressure-resistant sight glass to check liquid refrigerant charging. 2 A manifold with separate ports for HFCs and previous refrigerants is equipped as standard accessories.

  • Page 258: Index

    Si34-603 Index Index Index Index Electrical and Functional Parts Outdoor Unit ........... 36 A0 .................130 Electronic Expansion Valve PI Control ....51 A1 .................131 Error of External Protection Device ..... 130 A3 .................132 Excessive Number of Indoor Units ...... 184 A6 .................134 A7 .................135 A9 .................137...
  • Page 259 Si34-603 Malfunction code indication by Operation Mode ............ 48 outdoor unit PC board ........126 Operation when Power is Turned On ....77 Malfunction of Capacity Determination Device ..140 Option List ............226 Malfunction of Discharge Pipe Thermistor (R2T) .158 Outdoor Unit PC Board Layout ......78 Malfunction of Drain Level Control System (33H) 132 Outdoor Unit Thermistors for Discharge Pipe ..
  • Page 260 Si34-603 Drawings & Flow Charts Drawings & Flow Charts Drawings & Flow Charts Drawings & Flow Charts Abnormal Discharge Pipe Temperature ....155 Improper Combination of Optional Controllers for Actuation of High Pressure Switch .......147 Centralized Control ........193 Actuation of Low Pressure Sensor .......149 Inverter Compressor Abnormal ......
  • Page 261 Si34-603 Malfunction of Transmission between Indoor and BRC7C type ............ 80 Outdoor Units in the Same System ....182 BRC7E type ............ 80 Malfunction of Transmission between Indoor Units Wiring Diagrams ..........210 and Outdoor Units .........178 Malfunction of Transmission between Inverter and Control PC Board ..........170 Malfunction of Transmission between Main and Sub Remote Controllers ........181...
  • Page 262 July Printed in Japan 07/2006 AK...

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