Daikin VRV II RXYQ8MY1K Service Manual
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Daikin VRV II RXYQ8MY1K Service Manual

R-410a heat pump 50/60hz for high outdoor temperature use
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Si39 - 502A
RXYQ8-30MY1K(E), YLK(E)
R-410A Heat Pump 50/60Hz
For High Outdoor Temperature Use

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Summary of Contents for Daikin VRV II RXYQ8MY1K

  • Page 1 Si39 - 502A RXYQ8-30MY1K(E), YLK(E) R-410A Heat Pump 50/60Hz For High Outdoor Temperature Use...

  • Page 2: Table Of Contents

    Si39-502A R-410A Heat Pump 50/60Hz 1. Introduction .................... vi 1.1 Safety Cautions ..................vi 1.2 PREFACE ....................x Part 1 General Information ............1 1. Model Names of Indoor/Outdoor Units............2 2. External Appearance................3 2.1 Indoor Units ....................3 2.2 Outdoor Units ...................4 3.
  • Page 3 Si39-502A Protection Control .................69 High Pressure Protection Control............69 Low Pressure Protection Control............70 Discharge Pipe Protection Control ............71 Inverter Protection Control ..............72 STD Compressor Overload Protection...........73 Other Control..................74 Outdoor Unit Rotation................74 Emergency Operation ................75 Demand Operation .................77 Heating Operation Prohibition ..............77 6.
  • Page 4 Si39-502A 3.9 “C4” Indoor Unit: Malfunction of Thermistor (R2T) for Heat Exchanger..................162 3.10 “C5” Indoor Unit: Malfunction of Thermistor (R3T) for Gas Pipes..163 3.11 “C9” Indoor Unit: Malfunction of Thermistor (R1T) for Suction Air..164 3.12 “CJ” Indoor Unit: Malfunction of Thermostat Sensor in Remote Controller ................165 3.13 “E1”...
  • Page 5 Si39-502A 3.46 “U8” Indoor Unit: Malfunction of Transmission Between Main and Sub Remote Controllers ............206 3.47 “U9” Indoor Unit: Malfunction of Transmission Between Indoor and Outdoor Units in the Same System ............207 3.48 “UA” Improper Combination of Indoor and Outdoor Units, Indoor Unit and Remote Controller .................209 3.49 “UC”...
  • Page 6 Si39-502A Pressure Sensor .................279 Method of Replacing The Inverter’s Power Transistors and Diode Modules ............280 Part 8 Precautions for New Refrigerant (R-410A) ....283 Precautions for New Refrigerant (R-410A) .........284 1.1 Outline ....................284 Refrigerant Cylinders................286 Service Tools..................287 Index ..................... i Drawings &...

  • Page 7: Introduction

    Introduction Si39-502A 1. Introduction Safety Cautions Cautions and Be sure to read the following safety cautions before conducting repair work. The caution items are classified into “ Warning” and “ Caution”. The “ Warning” Warnings items are especially important since they can lead to death or serious injury if they are not followed closely.
  • Page 8 Si39-502A Introduction 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 9 Introduction Si39-502A 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 10 Si39-502A Introduction 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 11: Preface

    This is the new service manual for Daikin's Year 2005 VRVII series Heat Pump System. Daikin offers a wide range of models to respond to building and office air conditioning needs. We are confident that customers will be able to find the models that best suit their needs.

  • Page 12: Part 1 General Information

    Si39-502A Part 1 General Information 1. Model Names of Indoor/Outdoor Units............2 2. External Appearance................3 2.1 Indoor Units ....................3 2.2 Outdoor Units ...................4 3. Combination of Outdoor Units..............5 4. Capacity Range..................6 General Information...

  • Page 13: Model Names Of Indoor/Outdoor Units

    Model Names of Indoor/Outdoor Units Si39-502A 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

    Si39-502A External Appearance 2. External Appearance Indoor Units Ceiling Mounted Cassette Type (Double Flow) Wall Mounted Type FXCQ20M FXAQ20M FXCQ25M FXAQ25M FXCQ32M FXAQ32M FXCQ40M FXAQ40M FXCQ50M FXAQ50M FXCQ63M FXAQ63M FXCQ80M FXCQ125M Ceiling Mounted Cassette Type (Multi Flow) Floor Standing Type FXFQ25M FXLQ20M FXFQ32M...

  • Page 15: Outdoor Units

    External Appearance Si39-502A Outdoor Units RXYQ8M, 10M 8, 10HP RXYQ16M, 18M, 20M 16, 18, 20HP RXYQ24M, 26M, 28M, 30M 24, 26, 28, 30HP General Information...

  • Page 16: Combination Of Outdoor Units

    — – 10HP — 16HP — 18HP BHFP22M90K 20HP — 24HP — 26HP BHFP22M135K 28HP 30HP — Note: For multiple connection of 16HP system or more, an optional Daikin Outdoor Unit Multi Connection Piping Kit is required. General Information...

  • Page 17: Capacity Range

    Capacity Range Si39-502A 4. Capacity Range Outdoor Units Capacity Range 10HP 16HP 18HP 20HP 24HP 26HP 28HP 30HP RXYQ Max. Number of Connectable Indoor Units. Total Capacity Index of Indoor Units to be Connected Capacity Index : Only for High Outdoor Temperature Use Type (RXYQ MY1K(E), MYLK(E)) Indoor Units Capacity Range...

  • Page 18: Part 2 Specifications

    Si39-502A Part 2 Specifications Specifications ..................8 Outdoor Units ...................8 Indoor Units ....................16 Specifications...

  • Page 19: Specifications

    Specifications Si39-502A Specifications Outdoor Units 1.1.1 50Hz Model Name RXYQ8MY1K(E) RXYQ10MY1K(E) 6.6 / 6.5 8.0 / 6.8 Btu / h 78,800 / 77,800 96,200 / 82,200 1 / 2 Cooling Capacity kcal / h 19,900 / 19,600 24,300 / 20,700 23.1 / 22.8 28.2 / 24.1 6.4 / 6.4...
  • Page 20 Si39-502A Specifications Model Name (Combination Unit) RXYQ16MY1K(E) RXYQ18MY1K(E) RXYQ20MY1K(E) Model Name (Independent Unit) RXYQ8MY1K(E)+RXYQ8MY1K(E) RXYQ8MY1K(E)+RXYQ10MY1K(E) RXYQ10MY1K(E)+RXYQ10MY1K(E) 13.1 / 13.0 14.6 / 13.3 16.0 / 13.7 Btu / h 158,000 / 156,000 175,000 / 160,000 192,000 / 164,000 1 / 2 Cooling Capacity kcal / h 39,700 / 39,200 44,100 / 40,300...
  • Page 21 Specifications Si39-502A Model Name (Combination Unit) RXYQ24MY1K(E) RXYQ26MY1K(E) Model Name (Independent Unit) RXYQ8MY1K(E)+RXYQ8MY1K(E)+RXYQ8MY1K(E) RXYQ8MY1K(E)+RXYQ8MY1K(E)+RXYQ10MY1K(E) 19.7 / 19.4 21.1 / 19.8 Btu / h 236,000 / 233,000 254,000 / 238,000 1 / 2 Cooling Capacity kcal / h 59,600 / 58,800 64,000 / 59,900 69.3 / 68.4 74.4 / 69.7...
  • Page 22 Si39-502A Specifications Model Name (Combination Unit) RXYQ28MY1K(E) RXYQ30MY1K(E) Model Name (Independent Unit) RXYQ8MY1K(E)+RXYQ10MY1K(E)+RXYQ10MY1K(E) RXYQ10MY1K(E)+RXYQ10MY1K(E)+RXYQ10MY1K(E) 22.6 / 20.2 24.0 / 20.5 Btu / h 271,000 / 242,000 289,000 / 247,000 1 / 2 Cooling Capacity kcal / h 68,400 / 61,100 72,800 / 62,200 79.5 / 71.0 84.6 / 72.3...
  • Page 23 Specifications Si39-502A 1.1.2 60Hz Model Name RXYQ8MYLK(E) RXYQ10MYLK(E) 6.6 / 6.5 8.0 / 6.8 Btu / h 78,800 / 77,800 96,200 / 82,200 1 / 2 Cooling Capacity kcal / h 19,900 / 19,600 24,300 / 20,700 23.1 / 22.8 28.2 / 24.1 6.4 / 6.4 8.0 / 6.8...
  • Page 24 Si39-502A Specifications Model Name (Combination Unit) RXYQ16MYLK(E) RXYQ18MYLK(E) RXYQ20MYLK(E) Model Name (Independent Unit) RXYQ8MYLK(E)+RXYQ8MYLK(E) RXYQ8MYLK(E)+RXYQ10MYLK(E) RXYQ10MYLK(E)+RXYQ10MYLK(E) 13.1 / 13.0 14.6 / 13.3 16.0 / 13.7 Btu / h 158,000 / 156,000 175,000 / 160,000 192,000 / 164,000 1 / 2 Cooling Capacity kcal / h 39,700 / 39,200 44,100 / 40,300...
  • Page 25 Specifications Si39-502A Model Name (Combination Unit) RXYQ24MYLK(E) RXYQ26MYLK(E) Model Name (Independent Unit) RXYQ8MYLK(E)+RXYQ8MYLK(E)+RXYQ8MYLK(E) RXYQ8MYLK(E)+RXYQ8MYLK(E)+RXYQ10MYLK(E) 19.7 / 19.4 21.1 / 19.8 Btu / h 236,000 / 233,000 254,000 / 238,000 1 / 2 Cooling Capacity kcal / h 59,600 / 58,800 64,000 / 59,900 69.3 / 68.4 74.4 / 69.7...
  • Page 26 Si39-502A Specifications Model Name (Combination Unit) RXYQ28MYLK(E) RXYQ30MYLK(E) Model Name (Independent Unit) RXYQ8MYLK(E)+RXYQ10MYLK(E)+RXYQ10MYLK(E) RXYQ10MYLK(E)+RXYQ10MYLK(E)+RXYQ10MYLK(E) 22.6 / 20.2 24.0 / 20.5 Btu / h 271,000 / 242,000 289,000 / 247,000 1 / 2 Cooling Capacity kcal / h 68,400 / 61,100 72,800 / 62,200 79.5 / 71.0 84.6 / 72.3...

  • Page 27: Indoor Units

    Specifications Si39-502A 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 28 Si39-502A 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 29 Specifications Si39-502A 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 30 Si39-502A 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 31 Specifications Si39-502A Ceiling Mounted Cassette Corner Type Model FXKQ25MVE FXKQ32MVE FXKQ40MVE FXKQ63MVE kcal/h 2,500 3,200 4,000 6,300 1 Cooling Capacity (19.5°CWB) Btu/h 9,900 12,600 15,900 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 32 Si39-502A Specifications Slim Ceiling Mounted Duct Type (with Drain Pump) Model FXDQ20NVE FXDQ25NVE FXDQ32NVE 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 33 Specifications Si39-502A Slim Ceiling Mounted Duct Type (with Drain Pump) Model FXDQ40NVE FXDQ50NVE FXDQ63NVE 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 34 Si39-502A 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 35 Specifications Si39-502A 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 36 Si39-502A Specifications 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 37 Specifications Si39-502A 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 38 Si39-502A Specifications 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 39 Specifications Si39-502A Ceiling Mounted Duct Type Model FXMQ40MVE FXMQ50MVE FXMQ63MVE FXMQ80MVE 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 40 Si39-502A Specifications Ceiling Mounted Duct Type Model FXMQ100MVE FXMQ125MVE FXMQ200MVE FXMQ250MVE kcal/h 10,000 12,500 19,800 24,800 1 Cooling Capacity (19.5°CWB) Btu/h 39,600 49,500 78,500 98,300 11.6 14.5 23.0 28.8 2 Cooling Capacity (19.0°CWB) 11.2 14.0 22.4 28.0 kcal/h 10,800 13,800 21,500 27,100 3 Heating Capacity...

  • Page 41: Ceiling Suspended Type

    Specifications Si39-502A Ceiling Suspended Type Model FXHQ32MVE FXHQ63MVE FXHQ100MVE 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 42 Si39-502A Specifications Wall Mounted Type Model FXAQ20MVE FXAQ25MVE FXAQ32MVE 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 (3.0Y8.5/0.5) White (3.0Y8.5/0.5) White (3.0Y8.5/0.5) Dimensions: (H×W×D)
  • Page 43 Specifications Si39-502A Wall Mounted Type Model FXAQ40MVE FXAQ50MVE FXAQ63MVE 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 (3.0Y8.5/0.5) White (3.0Y8.5/0.5) White (3.0Y8.5/0.5) Dimensions: (H×W×D)
  • Page 44 Si39-502A Specifications Floor Standing Type Model FXLQ20MVE FXLQ25MVE FXLQ32MVE 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 45 Specifications Si39-502A Floor Standing Type Model FXLQ40MVE FXLQ50MVE FXLQ63MVE 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 46 Si39-502A Specifications Concealed Floor Standing Type Model FXNQ20MVE FXNQ25MVE FXNQ32MVE 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 47 Specifications Si39-502A Concealed Floor Standing Type Model FXNQ40MVE FXNQ50MVE FXNQ63MVE 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 48 Si39-502A Specifications Ceiling Suspended Cassette Type Indoor Unit FXUQ71MV1 FXUQ100MV1 FXUQ125MV1 Model Connection Unit BEVQ71MVE BEVQ100MVE BEVQ125MVE 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 (Max.) Btu/h...
  • Page 49 Specifications Si39-502A Wall Mounted Type Model FXAQ20MHV1 FXAQ25MHV1 FXAQ32MHV1 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 (3.0Y8.5/0.5) White (3.0Y8.5/0.5) White (3.0Y8.5/0.5) Dimensions: (H×W×D)
  • Page 50 Si39-502A Specifications Wall Mounted Type Model FXAQ40MHV1 FXAQ50MHV1 kcal/h 4,000 5,000 1 Cooling Capacity (19.5°CWB) Btu/h 16,000 19,800 2 Cooling Capacity (19.0°CWB) kcal/h 4,300 5,400 3 Heating Capacity Btu/h 17,100 21,500 Casing Color White (3.0Y8.5/0.5) White (3.0Y8.5/0.5) Dimensions: (H×W×D) 290×1,050×230 290×1,050×230 Rows×Stages×Fin Pitch 2×14×1.4...
  • Page 51 Specifications Si39-502A Floor Standing Type Model FXLQ20MHV1 FXLQ25MHV1 FXLQ32MHV1 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 52 Si39-502A Specifications Floor Standing Type Model FXLQ40MHV1 FXLQ50MHV1 kcal/h 4,000 5,000 1 Cooling Capacity (19.5°CWB) Btu/h 16,000 19,800 2 Cooling Capacity (19.0°CWB) kcal/h 4,300 5,400 3 Heating Capacity Btu/h 17,100 21,500 Casing Color Ivory White (5Y7.5/1) Ivory White (5Y7.5/1) Dimensions: (H×W×D) 600×1,140×222 600×1,420×222 Rows×Stages×Fin Pitch...
  • Page 53 Specifications Si39-502A Specifications...

  • Page 54: Part 3 Refrigerant Circuit

    Si39-502A Part 3 Refrigerant Circuit Refrigerant Circuit .................44 RXYQ8M, 10M ..................44 Functional Parts Layout ................46 RXYQ8M, 10M ..................46 Refrigerant Flow for Each Operation Mode...........47 Refirgerant Circuit...

  • Page 55: Refrigerant Circuit

    Refrigerant Circuit Si39-502A Refrigerant Circuit RXYQ8M, 10M No. in refrigerant Symbol Name Major Function system diagram Inverter compressor (INV) Inverter compressor is operated on frequencies between 52 Hz and 210 Hz by using the inverter, while Standard compressor is operated with commercial power supply only.
  • Page 56 Si39-502A Refrigerant Circuit RXYQ8M, 10M 3D049524 Refirgerant Circuit...

  • Page 57: Functional Parts Layout

    Functional Parts Layout Si39-502A Functional Parts Layout RXYQ8M, 10M Plan Solenoid valve (Hot gas bypass)Y1S Thermistor High pressure switch High pressure switch Thermistor (Discharge pipe M1C)R31T (High pressure protection)S1PH (High pressure protection)S2PH (Discharge pipe M2C)R32T Front View Fan motor Solenoid valve (Receiver gas discharging)Y2S Thermistor (Receiver outlet liquid pipe)R6T...

  • Page 58: Refrigerant Flow For Each Operation Mode

    Si39-502A Refrigerant Flow for Each Operation Mode Refrigerant Flow for Each Operation Mode RXYQ8M, 10M Cooling Operation Indoor unit operation Fan ON Fan ON Fan OFF " ON " " OFF " " ON " "High temperature, high pressure gas" Heat exchanger Heat exchanger Heat exchanger...

  • Page 59: Cooling Oil Return Operation

    Refrigerant Flow for Each Operation Mode Si39-502A Cooling Oil Return Operation Indoor unit operation Fan ON Fan OFF " OFF " " ON " " ON " Fan OFF "High temperature, high pressure gas" Heat exchanger Heat exchanger Heat exchanger "High temperature, high pressure liquid"...
  • Page 60 Si39-502A Refrigerant Flow for Each Operation Mode Heating Oil Return & Defrost Operation Indoor unit operation " ON " " OFF " " ON " Fan OFF Fan OFF Fan OFF "High temperature, high pressure gas" Heat exchanger Heat exchanger Heat exchanger "High temperature, high pressure liquid"...

  • Page 61: Heating Operation

    Refrigerant Flow for Each Operation Mode Si39-502A Heating Operation Indoor unit operation Fan ON Fan LL Fan OFF " ON " " OFF " " ON " "High temperature, high pressure gas" Heat exchanger Heat exchanger Heat exchanger "High temperature, high pressure liquid" "Low temperature, low pressure"...

  • Page 62: Part 4 Function

    Si39-502A Part 4 Part 4 Part 4 Part 4 Function Function Function Function 1. Function General...................52 1.1 Symbol ....................52 1.2 Operation Mode..................53 2. Basic Control..................54 2.1 Normal Operation ...................54 2.2 Compressor PI Control................55 2.3 Electronic Expansion Valve PI Control...........58 2.4 Step Control of Outdoor Unit Fans ............58 2.5 Outdoor Unit Fan Control in Cooling Operation ........59 3.

  • Page 63: Function General

    Function General Si39-502A 1. Function General Symbol Symbol Electric symbol Description or function 20S1 Four way valve (Energize during heating) – Discharge pipe superheated degree DSHi – Discharge pipe superheat of inverter compressor DSHs – Discharge pipe superheat of standard compressor –...

  • Page 64: Operation Mode

    Si39-502A Function General 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 Pump-down •...

  • Page 65: Basic Control

    Basic Control Si39-502A Basic Control Normal Operation 2.1.1 List of Functions in Normal Operation Function of Functional Part (Electric Part Name Symbol Symbol) Normal Cooling Normal Heating PI control, High pressure PI control, High pressure protection, Low pressure protection, Low pressure ...

  • Page 66: Compressor Pi Control

    Si39-502A Basic Control 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 achieve target value (TeS).
  • Page 67 Basic Control Si39-502A Operating Priority and Rotation of Compressors Each compressor operates in the following order of priority. INV: Inverter compressor In the case of multi-outdoor-unit system, each compressor operates in any of Pattern 1 STD1: Standard compressor 1 through Pattern 3 according to the rotation of outdoor units. Pattern 1 Pattern 2 Pattern 3...
  • Page 68 Si39-502A Basic Control RXYQ16M, 18M, 20M RXYQ24M, 26M, 28M, 30M (To increase Step No.) (To decrease Step No.) (To increase Step No.) (To decrease Step No.) Master Slave Master Slave Master Slave Slave Master Slave Slave STEP STEP STEP STEP unit unit unit...

  • Page 69: Electronic Expansion Valve Pi Control

    Basic Control Si39-502A Electronic Expansion Valve PI Control Main Motorized Valve EV1 Control Carries out the motorized 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 70: Outdoor Unit Fan Control In Cooling Operation

    Si39-502A Basic Control Outdoor Unit Fan Control in Cooling Operation While in cooling operation, if the outdoor temperature is low, this mode provides high-pressure control using the outdoor unit fan to retain appropriate liquid pressure, thus ensuring refrigerant circulation rate to be supplied to indoor units. Upper limit of fan revolutions: Step 8 Pc <...

  • Page 71: Special Control

    Special Control Si39-502A 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 72: Oil Return Operation

    Si39-502A Special Control 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 73 Special Control Si39-502A 3.2.2 Oil Return Operation in Heating Operation Oil return preparation Outdoor Unit Actuator Oil return operation Post-oil-return operation operation 1-step increase from Compressor Upper limit control 124 Hz + ON + OFF (74 Hz + OFF + OFF) to (Pc - Pe>0.4 MPa) time STEP7 Outdoor unit fan...

  • Page 74: Defrosting Operation

    Si39-502A Special Control Defrosting Operation To defrost the outdoor unit heat exchanger while in heating operation, the defrost operation is conducted to recover the heating capacity. [Start conditions] Referring to the set conditions for the following items, start the defrosting operation. •...

  • Page 75: Pump-Down Residual Operation

    Special Control Si39-502A Pump-down Residual Operation 3.4.1 Pump-down Residual Operation in Cooling Operation If the liquid refrigerant stays in the heat exchanger at the startup of a compressor, this liquid refrigerant enters the compressor, thus resulting in diluted oil in the compressor and then degraded lubrication performance. Consequently, in order to recover the refrigerant in the heat exchanger while the compressor stops, the pump-down residual operation is conducted.

  • Page 76: Standby

    Si39-502A Special Control Standby 3.5.1 Restart Standby Used to forcedly stop the compressor for a period of five minutes, in order to prevent the frequent ON/OFF of the compressor and equalize the pressure within the refrigerant system. Actuator Operation Remarks ...

  • Page 77: Stopping Operation

    Special Control Si39-502A Stopping Operation 3.6.1 When System is in Stop Mode This mode is used to define actuator operations when the system stops. Actuator Operation Compressor Outdoor unit fan Four way valve Holds Main motorized valve (EV1) 0 pls Subcooling motorized valve (EV2) 0 pls Hot gas bypass valve (SVP)
  • Page 78 Si39-502A Special Control 3.6.3 Stopping Operation of Slave Units During Master Unit is in Operation with Multi-Outdoor-Unit System While the master unit is in operation, this mode is used to set the refrigerant flow rate to a required level using a slave unit in the stopped mode.

  • Page 79: Pressure Equalization Prior To Startup

    Special Control Si39-502A Pressure Equalization Prior to Startup Actuator Operation Remarks Compressor — Cooling:OFF Outdoor unit fan — Heating:STEP 4 Four way valve Holds — Main motorized valve (EV1) 0 pls — Subcooling motorized valve (EV2) 0 pls — Hot gas bypass valve (SVP) —...

  • Page 80: Protection Control

    Si39-502A Protection Control 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] In the case of multi-outdoor-unit system, each outdoor unit performs this control individually in the following sequence.

  • Page 81: Low Pressure Protection Control

    Protection Control Si39-502A Low Pressure Protection Control This low pressure protection control is used to protect compressors against the transient decrease of low pressure. [In cooling operation] In the case of multi-outdoor-unit system, the entire system performs this control in the following sequence.

  • Page 82: Discharge Pipe Protection Control

    Si39-502A Protection Control 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. Each compressor performs the discharge pipe temperature protection control individually in the following sequence.

  • Page 83: Inverter Protection Control

    Protection Control Si39-502A 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. In the case of multi-outdoor-unit system, each INV compressor performs these controls in the following sequence.

  • Page 84: Std Compressor Overload Protection

    Si39-502A Protection Control STD Compressor Overload Protection This control is used to prevent abnormal heating due to overcurrent to the compressor resulting from failures of STD compressor such as locking. STD compressor ON *If the power supply is reset while in operation prohibition mode, the prohibition Demand to operate.

  • Page 85: Other Control

    Other Control Si39-502A Other Control Outdoor Unit Rotation In the case of multi-outdoor-unit system, this outdoor unit rotation is used to prevent the compressor from burning out due to unbalanced oil level between outdoor units. [Details of outdoor unit rotation] In the case of multi-outdoor-unit system, each outdoor unit is given an operating priority for the control.

  • Page 86: Emergency Operation

    Si39-502A Other Control Emergency Operation If the compressor cannot operate, this control inhibits any applicable compressor or outdoor unit from operating to perform emergency operation only with the operative compressor or outdoor unit. Caution In order to disable the compressor operation due to a failure or else, be sure to do so in emergency operation mode.
  • Page 87 Other Control Si39-502A 5.2.3 In the Case of Multi-Outdoor-Unit System (RXYQ16M to 30M) [Automatic backup operation] With multi-outdoor-unit system, if a certain outdoor unit system malfunctions (i.e., the system stops and indoor unit remote controller displays the malfunction), by resetting the system with the indoor unit remote controller, the applicable outdoor unit is inhibited from operating for 8 hours, thus making it possible to perform emergency operation automatically.

  • Page 88: Demand Operation

    Si39-502A Other Control • In order to set the SLAVE unit 2 to operation prohibition mode, set No. 40 of Setting mode 2 to LED display (7:ON :OFF :Blink) "SUB 2 OPERATION PROHIBITION". H1P----H7P (Procedure) (1) Press and hold the MODE button (BS1) for a period 7777777 777777 of 5 seconds or more.

  • Page 89: Outline Of Control (Indoor Unit)

    Outline of Control (Indoor Unit) Si39-502A 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 90 Si39-502A Outline of Control (Indoor Unit) 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 91: Louver Control For Preventing Ceiling Dirt

    Outline of Control (Indoor Unit) Si39-502A 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 92: Thermostat Sensor In Remote Controller

    Si39-502A Outline of Control (Indoor Unit) 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 93 Outline of Control (Indoor Unit) Si39-502A 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 94: Thermostat Control While In Normal Operation

    Si39-502A Outline of Control (Indoor Unit) Thermostat Control While in Normal Operation VRV multi systems are set at factory to thermostat control mode using the remote controller. While in normal thermostat differential control mode (i.e., factory set mode), the thermostat turns OFF when the system reaches a temperature of -1°C from the set temperature while in cooling operation or of +1°C from that while in heating operation.

  • Page 95: Freeze Prevention

    Outline of Control (Indoor Unit) Si39-502A 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 96: Heater Control

    Si39-502A Outline of Control (Indoor Unit) Heater Control The heater control is conducted in the following manner. [Normal control] While in heating operation, the heater Set temperature control (ON/OFF) is conducted as shown on the right. 2ºC 2ºC [Overload control] When the system is overloaded in heating operation, the heater will 43ºC...

  • Page 97: List Of Swing Flap Operations

    Outline of Control (Indoor Unit) Si39-502A List of Swing Flap Operations Swing flaps operate as shown in table below. Flap FXCQ FXFQ FXHQ FXAQ FXKQ Swing Horizontal Horizontal Horizontal Hot start from defrosting operation Wind direction set OFF Horizontal Horizontal Horizontal Swing Horizontal...

  • Page 98: Part 5 Test Operation

    Si39-502A Part 5 Test Operation Test Operation ..................88 Procedure and Outline ................88 Operation When Power is Turned On ............92 Outdoor Unit PC Board Layout .............93 Field Setting ..................94 Field Setting from Remote Controller .............94 3.2 Field Setting from Outdoor Unit............106 Test Operation...

  • Page 99: Test Operation

    Test Operation Si39-502A 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 wiring performed as specified? ¡ Check the below items. Is the designated wire used? ¡...
  • Page 100 Si39-502A Test Operation 1.1.2 Turn Power On ¡ Be sure to turn the power on 6 hours before starting operation to protect Turn outdoor unit and indoor compressors. (to power on clankcase heater) unit power on. ¡ Check to be sure the transmission is normal. Check the LED display of the The transmission is normal if the LEDs display conditions as shown in outdoor unit PC board.
  • Page 101 Test Operation Si39-502A 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.) If the LED "H1P" turns OFF, the system is set to "Setting mode 1". Check Setting mode 1.
  • Page 102 Si39-502A Test Operation Malfunction code In case of an alarm code displayed on remote controller: Cause of trouble due to faulty Alarm Countermeasure installation work code The stop valve of an outdoor unit is left Open the stop valve. closed. The phases of the power to the outdoor Exchange two of the three phases (L1, L2, L3) to make a positive units are reversed.

  • Page 103: Operation When Power Is Turned On

    Test Operation Si39-502A 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 104: Outdoor Unit Pc Board Layout

    Si39-502A Outdoor Unit PC Board Layout Outdoor Unit PC Board Layout Outdoor unit PC board C/H SELECTOR (2) Set mode display (LED) TEST: 9 MODE L.N.O.P DEMAND MASTER SLAVE HWL : 8 MULTI H1P H2P H3P H4P H5P H6P H7P (3) Mode setting switch MODE RETURN...

  • Page 105: Field Setting

    Field Setting Si39-502A 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 106 Si39-502A Field Setting 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 107 Field Setting Si39-502A 3.1.3 Simplified Remote Controller BRC2A51 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 108 Si39-502A Field Setting 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 109 Field Setting Si39-502A 3.1.5 Applicable Range of Field Setting Ceiling mounted cassette type Slim Ceiling Ceiling Ceiling Wall Floor Concealed Ceiling mounted mounted suspended mounted standing Floor Ceiling Multi Double Corner mounted built-in duct type type type type standing suspended flow flow type...

  • Page 110: Detailed Explanation Of Setting Modes

    Si39-502A Field Setting 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 111 Field Setting Si39-502A Air Flow Adjustment - Ceiling height Make the following setting according to the ceiling height. The setting position No. is set to “01” at the factory. In the Case of FXAQ, FXHQ Setting Switch Setting Position Mode No. Setting Wall-mounted type : Standard 13(23)
  • Page 112 Si39-502A 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 113 Field Setting Si39-502A 3.1.7 Centralized Control Group No. Setting BRC1A Type Set the group number of each group of the indoor unit from the remote controller. (In case of no remote controller, also connect the remote controller and set the group No. Then, remove the remote controller.) 1.
  • Page 114 Si39-502A Field Setting BRC7C Type Group No. setting by wireless remote controller for centralized control BRC7E Type 1. When in the normal mode, push “ ” button for 4 seconds or more, and operation then enters the “field set mode.” BRC4C Type 2.
  • Page 115 Field Setting Si39-502A 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 116 Si39-502A 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 117: Field Setting From Outdoor Unit

    Field Setting Si39-502A Field Setting from Outdoor Unit 3.2.1 Field Setting from Outdoor Unit List of Field Setting Items This following section indicates the list of field setting items. For the lists of dip switch contents, Setting mode 1, and Setting mode 2, refer to information in tables shown on the following page onward.
  • Page 118 Si39-502A Field Setting Setting item Content and objective of setting Overview of setting procedure Indoor unit fan Used to operate the indoor unit in the Set No. 5 of "Setting mode 2" to indoor unit forced H operation stopped state in forced H operation mode. forced fan H.
  • Page 119 Field Setting Si39-502A Setting by dip switches Using dip switches on the PC board enables field setting shown below. However, make no changes of factory settings except for DS1-1. Dipswitch Setting item Description Setting Cool / Heat select Used to set cool / heat select by remote controller DS1-1 equipped with outdoor unit.
  • Page 120 Si39-502A Field Setting “Detail of DS1-1~4, DS2-1~4 setting” New unit Setting method ( represents the position of switches) HEAT PUMP(8HP) Set DS1-4, DS2-1 and DS2-3 RXYQ8M to ON. HEAT PUMP(10HP) Set DS1-4, DS2-1, DS2-2 and RXYQ10M DS2-3 to ON. Test Operation...
  • Page 121 Field Setting Si39-502A Setting by pushbutton switches The following settings are made by pushbutton switches on PC board. In case of multi-outdoor unit system, various items should be set with the master unit. (Setting with the slave unit is disabled.) The master unit and slave unit can be discriminated with the LED display as shown below.
  • Page 122 Si39-502A 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 123 Field Setting Si39-502A 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 Indoor unit forced Allows forced operation of indoor unit fan while unit is...
  • Page 124 Si39-502A Field Setting Setting item Description Emergency operation (Setting for the master unit operation prohibition in multi- outdoor-unit system) Emergency operation Used to temporarily prohibit the applicable outdoor unit (Setting for the from operating should there be any faulty part in multi- slave unit 1 outdoor-unit system.
  • Page 125 Field Setting Si39-502A 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 Binary number 8777778 Low noise/demand address...
  • Page 126 Si39-502A Field Setting Setting item display C/H selection Setting condition display MODE TEST Demand Setting item noise Master Slave ∗ Factory set 8777778 ∗ ENECUT test EneCut output OFF operation (Domestic Japan only) EneCut output forced ON 8777787 Level 1 (outdoor fan with 8 step or lower) 8777778 8777787 ∗...
  • Page 127 Field Setting Si39-502A 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 128 Si39-502A Field Setting 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 129 Field Setting Si39-502A 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 130 Si39-502A Field Setting 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 131 Field Setting Si39-502A Set Cool / Heat for More Than One Outdoor Unit System Simultaneously in Accordance with Unified Master Outdoor Unit by Indoor Unit Remote Controller Install the external control adapter for outdoor unit on either the outdoor-outdoor, indoor- outdoor transmission line.
  • Page 132 Si39-502A Field Setting Set Cool / Heat for More Than One Outdoor Unit System Simultaneously in Accordance with Unified Master Outdoor Unit by Cool / Heat Switching Remote Controller Install the external control adapter for outdoor unit on either the outdoor-outdoor, indoor- outdoor transmission line.
  • Page 133 Field Setting Si39-502A Supplementation on When switching cool/heat for each adapter PC board with the use of more than one adapter PC board, set the address of the external control adaptor for outdoor unit PC board DS1 and DS2 so that it matches the unified cool/heat address of outdoor unit main PC board. Address setting for (Set lower 5 digits with binary number.) [No.0 to No.31] External control adaptor for outdoor unit...
  • Page 134 Si39-502A 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. Setting Content Mode 1...
  • Page 135 Field Setting Si39-502A Image of operation in the case of A Image of operation in the case of B Image of operation in the case of A and B Test Operation...
  • Page 136 Si39-502A Field Setting 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 1...
  • Page 137 Field Setting Si39-502A Image of operation in the case of A Power consumption The power Rated power consumption consumption during 80 % of rated power consumption Demand level 1 instructing Demand level 2 instructing Demand level 3 instructing the demand level 1 70 % of rated power consumption instructing can be 60 % of rated power consumption...
  • Page 138 Si39-502A 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 139 Field Setting Si39-502A : 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 140 Si39-502A Field Setting 3.2.4 Setting of Refrigerant Additional Charging Operation When additional refrigerant is not charged all with outdoor unit in stop mode, operate the outdoor unit and charge the liquid refrigerant from the service port of liquid stop value. The additional charging operation is activated by pushbutton switch on the outdoor unit PC board.
  • Page 141 Field Setting Si39-502A [Operation procedure detail] After turning the respective power supply switch of indoor and outdoor units off and charging the refrigerant, turn on the power of indoor and outdoor units. Do not fail to turn the power off and charge the refrigerant with outdoor unit in stop mode before adding the refrigerant following this procedure, otherwise resulting in trouble.
  • Page 142 Si39-502A 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] With Setting Mode 2 while the unit stops, set “Refrigerant recovery / Vacuuming mode” to ON.
  • Page 143 Field Setting Si39-502A Test Operation...

  • Page 144: Part 6 Troubleshooting

    Si39-502A Part 6 Part 6 Part 6 Part 6 Troubleshooting Troubleshooting Troubleshooting Troubleshooting 1. Symptom-based Troubleshooting ............136 2. Troubleshooting by Remote Controller ..........139 2.1 The INSPECTION / TEST Button............139 2.2 Self-diagnosis by Wired Remote Controller .........140 2.3 Self-diagnosis by Wireless Remote Controller ........141 2.4 Operation of The Remote Controller’s Inspection / Test Operation Button ................143 2.5 Remote Controller Service Mode ............144...
  • Page 145 Si39-502A 3.28 “J7” Outdoor Unit: Malfunction of Receiver Outlet Liquid Pipe Thermistor (R6T) ........184 3.29 “J9” Outdoor Unit: Malfunction of Subcooling Heat Exchanger Gas Pipe Thermistor (R5T).....185 3.30 “JA” Outdoor Unit: Malfunction of High Pressure Sensor......186 3.31 “JC” Outdoor Unit: Malfunction of Low Pressure Sensor.......187 3.32 “L4”...
  • Page 146 Si39-502A 5.4 “MA” Improper Combination of Optional Controllers for Centralized Control................224 5.5 “MC” Address Duplication, Improper Setting ..........226 6. Troubleshooting (OP: Unified ON/OFF Controller) ......227 6.1 Operation Lamp Blinks .................227 6.2 Display “Under Centralized Control” Blinks (Repeats Single Blink) ..229 6.3 Display “Under Centralized Control”...

  • Page 147: Symptom-Based Troubleshooting

    Symptom-based Troubleshooting Si39-502A 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 148 Si39-502A Symptom-based Troubleshooting Symptom Supposed Cause Countermeasure The system This symptom occurs The system is in preparation Wait for a period of approximately conducts air immediately after turning ON mode of operation. 10 minutes. blasting the power supply. operation but not cooling or heating operation.
  • Page 149 Symptom-based Troubleshooting Si39-502A 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 150: Troubleshooting By Remote Controller

    Si39-502A Troubleshooting by Remote Controller 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 151: Self-Diagnosis By Wired Remote Controller

    Troubleshooting by Remote Controller Si39-502A 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 152: Self-Diagnosis By Wireless Remote Controller

    Si39-502A Troubleshooting by Remote Controller 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 153 Troubleshooting by Remote Controller Si39-502A The lower digit of the code changes as shown below when the UP and DOWN buttons are pressed. Troubleshooting...

  • Page 154: Operation Of The Remote Controller's Inspection / Test Operation Button

    Si39-502A Troubleshooting by Remote Controller 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 155: Remote Controller Service Mode

    Troubleshooting by Remote Controller Si39-502A 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 156 Si39-502A Troubleshooting by Remote Controller 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 157: Remote Controller Self-Diagnosis Function

    Troubleshooting by Remote Controller Si39-502A 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 158 Si39-502A Troubleshooting by Remote Controller 8: ON 7: OFF 9: Blink Malfunction Operation Inspection Unit No. Malfunction contents Page code lamp display Referred Indoor Error of external protection device Unit 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 159 Troubleshooting by Remote Controller Si39-502A 8: ON 7: OFF 9: Blink Malfunction Operation Inspection Unit No. Malfunction contents Page code lamp display Referred Outdoor Malfunction of power unit — Unit Malfunction of transmission between inverter and control PC board Inverter over-ripple protection Malfunction of inverter radiating fin temperature rise sensor System...

  • Page 160: Troubleshooting

    Si39-502A Troubleshooting by Remote Controller 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 “Setting mode 1”. Abnormal discharge pressure HPS activated Abnormal suction pressure Abnormal Pe Compressor lock...
  • Page 161 Troubleshooting by Remote Controller Si39-502A 8: ON 7: OFF 9:Blink Malfunction Confirmation of malfunction 1 Confirmation of malfunction 2 Confirmation of malfunction 3 code Malfunction code 1st Malfunction code 2nd Malfunction Master digit display section digit display section location Slave 1 Slave 2 Troubleshooting...

  • Page 162: Troubleshooting By Indication On The Remote Controller

    Si39-502A Troubleshooting by Indication on the Remote Controller 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 Detect open or short circuit between external input terminals in indoor unit. Malfunction Detection Malfunction...

  • Page 163: A1" Indoor Unit: Pc Board Defect

    Troubleshooting by Indication on the Remote Controller Si39-502A “ 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 164: A3" Indoor Unit: Malfunction Of Drain Level Control System (S1L)

    Si39-502A Troubleshooting by Indication on the Remote Controller “ A3 ” Indoor Unit: Malfunction of Drain Level Control System (S1L) Remote Controller Display Applicable FXCQ, FXFQ, FXSQ, FXKQ, FXDQ, FXMQ, FXUQ, FXHQ (Option), FXMQ200,250M (Option), FXAQ (Option) Models Method of By float switch OFF detection Malfunction Detection...
  • Page 165 Troubleshooting by Indication on the Remote Controller Si39-502A 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 166: A6" Indoor Unit: Fan Motor (M1F) Lock, Overload

    Si39-502A Troubleshooting by Indication on the Remote Controller “ A6 ” Indoor Unit: Fan Motor (M1F) Lock, Overload Remote Controller Display Applicable All indoor units Models Method of Detection by failure of signal for detecting number of turns to come from the fan motor Malfunction Detection Malfunction...

  • Page 167: A7" Indoor Unit: Malfunction Of Swing Flap Motor (Ma)

    Troubleshooting by Indication on the Remote Controller Si39-502A “ A7 ” Indoor Unit: Malfunction of Swing Flap Motor (MA) Remote Controller Display Applicable FXCQ, FXHQ, FXKQ 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...
  • Page 168 Si39-502A 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. Indoor unit is a model equipped Replace indoor unit PC board.

  • Page 169: A9" Indoor Unit: Malfunction Of Moving Part Of Electronic

    Troubleshooting by Indication on the Remote Controller Si39-502A “ A9 ” Indoor Unit: Malfunction of Moving Part of Electronic Expansion Valve (20E) Remote Controller Display Applicable All indoor unit models Models Method of Use a microcomputer to check the electronic expansion valve for coil conditions. Malfunction Detection Malfunction...
  • Page 170 Si39-502A Troubleshooting by Indication on the Remote Controller ∗1: Coil check method for the moving part of the electronic expansion valve Disconnect the electronic expansion valve from the PC board and check the continuity between the connector pins. (Normal) Pin No. 1.

  • Page 171: Af" Indoor Unit

    Troubleshooting by Indication on the Remote Controller Si39-502A “ AF ” Indoor Unit: Drain Level above Limit Remote Controller Display Applicable FXCQ, FXFQ, FXSQ, FXKQ, FXMQ, FXDQ, FXUQ Models Method of Water leakage is detected based on float switch ON/OFF operation while the compressor is in non-operation.

  • Page 172: Aj" Indoor Unit: Malfunction Of Capacity Determination Device

    Si39-502A Troubleshooting by Indication on the Remote Controller “ 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 173: C4" Indoor Unit: Malfunction Of Thermistor (R2T) For

    Troubleshooting by Indication on the Remote Controller Si39-502A “ 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 174: 3.10 " C5 " Indoor Unit

    Si39-502A Troubleshooting by Indication on the Remote Controller 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 175: 3.11 " C9 " Indoor Unit

    Troubleshooting by Indication on the Remote Controller Si39-502A 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 176: Cj" Indoor Unit: Malfunction Of Thermostat Sensor In

    Si39-502A Troubleshooting by Indication on the Remote Controller 3.12 “ 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 177: E1" Outdoor Unit: Pc Board Defect

    Troubleshooting by Indication on the Remote Controller Si39-502A 3.13 “ E1 ” Outdoor Unit: PC Board Defect Remote Controller Display Applicable RXYQ8~30MY1K (E), YLK (E) 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 178: E3" Outdoor Unit: Actuation Of High Pressure Switch

    Si39-502A Troubleshooting by Indication on the Remote Controller 3.14 “ E3 ” Outdoor Unit: Actuation of High Pressure Switch Remote Controller Display Applicable RXYQ8~30MY1K (E), YLK (E) Models Method of Abnormality is detected when the contact of the high pressure protection switch opens. Malfunction Detection Malfunction...

  • Page 179: E4" Outdoor Unit: Actuation Of Low Pressure Sensor

    Troubleshooting by Indication on the Remote Controller Si39-502A 3.15 “ E4 ” Outdoor Unit: Actuation of Low Pressure Sensor Remote Controller Display Applicable RXYQ8~30MY1K (E), YLK (E) Models Method of Abnormality is detected by the pressure value with the low pressure sensor. Malfunction Detection Malfunction...

  • Page 180: E5" Outdoor Unit: Compressor Motor Lock

    Si39-502A Troubleshooting by Indication on the Remote Controller 3.16 “ E5 ” Outdoor Unit: Compressor Motor Lock Remote Controller Display Applicable RXYQ8~30MY1K (E), YLK (E) Models Method of Inverter PC board takes the position signal from UVWN line connected between the inverter and compressor, and detects the position signal pattern.

  • Page 181: E6" Outdoor Unit: Std Compressor Motor Overcurrent/Lock

    Troubleshooting by Indication on the Remote Controller Si39-502A 3.17 “ E6 ” Outdoor Unit: STD Compressor Motor Overcurrent/ Lock Remote Controller Display Applicable RXYQ8~30MY1K (E), YLK (E) Models Method of Detects the overcurrent with current sensor (CT). Malfunction Detection Malfunction Malfunction is decided when the detected current value exceeds the below mentioned value for 2 seconds.
  • Page 182 Si39-502A 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 the stop valve open? Open the stop valve. Obstacle exists around the air Remove the obstacle.

  • Page 183: E7" Outdoor Unit: Malfunction Of Outdoor Unit Fan Motor

    Troubleshooting by Indication on the Remote Controller Si39-502A “ E7 ” Outdoor Unit: 3.18 Malfunction of Outdoor Unit Fan Motor Remote Controller Display Applicable RXYQ8~30MY1K (E), YLK (E) 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 184 Si39-502A Troubleshooting by Indication on the Remote Controller Troubleshooting Check No. 1 Check on pulse input of position signal of fan inverter PC board Is the LED (HAP) on fan inverter Replace the fan inverter PC PC board blinking? board. Check No.

  • Page 185: 3.19 " E9 " Outdoor Unit

    Troubleshooting by Indication on the Remote Controller Si39-502A 3.19 “ E9 ” Outdoor Unit: Malfunction of Moving Part of Electronic Expansion Valve (Y1E, Y2E) Remote Controller Display Applicable RXYQ8~30MY1K (E), YLK (E) Models Method of Check disconnection of connector Check continuity of expansion valve coil Malfunction Detection Malfunction...
  • Page 186 Si39-502A Troubleshooting by Indication on the Remote Controller ∗1 Coil check method for the moving part of the electronic expansion valve Disconnect the electronic expansion valve from the PC board and check the continuity between the connector pins. (Normal) Pin No. 1.

  • Page 187: F3" Outdoor Unit: Abnormal Discharge Pipe Temperature

    Troubleshooting by Indication on the Remote Controller Si39-502A 3.20 “ F3 ” Outdoor Unit: Abnormal Discharge Pipe Temperature Remote Controller Display Applicable RXYQ8~30MY1K (E), YLK (E) Models Method of Abnormality is detected according to the temperature detected by the discharge pipe temperature sensor.

  • Page 188: F6" Outdoor Unit: Refrigerant Overcharged

    Si39-502A Troubleshooting by Indication on the Remote Controller 3.21 “ F6 ” Outdoor Unit: Refrigerant Overcharged Remote Controller Display Applicable RXYQ8~30MY1K (E), YLK (E) Models Method of Refrigerant overcharge is detected from the suction pipe and subcooling heat exchanger gas pipe temperature during check operation.

  • Page 189: H7" Outdoor Unit: Abnormal Outdoor Fan Motor Signal

    Troubleshooting by Indication on the Remote Controller Si39-502A 3.22 “ H7 ” Outdoor Unit: Abnormal Outdoor Fan Motor Signal Remote Controller Display Applicable RXYQ8~30MY1K (E), YLK (E) Models Method of Detection of abnormal signal from fan motor. Malfunction Detection Malfunction In case of detection of abnormal signal at starting fan motor.

  • Page 190: 3.23 " H9 " Outdoor Unit

    Si39-502A Troubleshooting by Indication on the Remote Controller 3.23 “ H9 ” Outdoor Unit: Malfunction of Thermistor (R1T) for Outdoor Air Remote Controller Display Applicable RXYQ8~30MY1K (E), YLK (E) Models Method of The abnormal detection is based on current detected by current sensor. Malfunction Detection Malfunction...

  • Page 191: J2" Outdoor Unit: Current Sensor Malfunction

    Troubleshooting by Indication on the Remote Controller Si39-502A “ J2 ” Outdoor Unit: 3.24 Current Sensor Malfunction Remote Controller Display Applicable RXYQ8~30MY1K (E), YLK (E) Models Method of Malfunction is detected according to the current value detected by current sensor. Malfunction Detection Malfunction...

  • Page 192: 3.25 " J3 " Outdoor Unit

    Si39-502A Troubleshooting by Indication on the Remote Controller 3.25 “ J3 ” Outdoor Unit: Malfunction of Discharge Pipe Thermistor (R3, R31 or 32T) Remote Controller Display Applicable RXYQ8~30MY1K (E), YLK (E) Models Method of Malfunction is detected from the temperature detected by discharge pipe temperature thermistor.

  • Page 193: J5" Outdoor Unit: Malfunction Of Thermistor (R2T) For

    Troubleshooting by Indication on the Remote Controller Si39-502A 3.26 “ J5 ” Outdoor Unit: Malfunction of Thermistor (R2T) for Suction Pipe Remote Controller Display Applicable RXYQ8~30MY1K (E), YLK (E) Models Method of Malfunction is detected from the temperature detected by the suction pipe temperature thermistor.

  • Page 194: 3.27 " J6 " Outdoor Unit

    Si39-502A Troubleshooting by Indication on the Remote Controller 3.27 “ J6 ” Outdoor Unit: Malfunction of Thermistor (R4T) for Outdoor Unit Heat Exchanger Deicer Remote Controller Display Applicable RXYQ8~30MY1K (E), YLK (E) Models Method of Malfunction is detected from the temperature detected by the heat exchanger thermistor. Malfunction Detection Malfunction...

  • Page 195: J7" Outdoor Unit: Malfunction Of

    Troubleshooting by Indication on the Remote Controller Si39-502A 3.28 “ J7 ” Outdoor Unit: Malfunction of Receiver Outlet Liquid Pipe Thermistor (R6T) Remote Controller Display Applicable RXYQ8~30MY1K (E), YLK (E) Models Method of Malfunction is detected according to the temperature detected by receiver outlet liquid pipe thermistor.

  • Page 196: J9" Outdoor Unit: Malfunction Of

    Si39-502A Troubleshooting by Indication on the Remote Controller 3.29 “ J9 ” Outdoor Unit: Malfunction of Subcooling Heat Exchanger Gas Pipe Thermistor (R5T) Remote Controller Display Applicable RXYQ8~30MY1K (E), YLK (E) Models Method of Malfunction is detected according to the temperature detected by subcooling heat exchanger gas pipe thermistor.

  • Page 197: Ja" Outdoor Unit: Malfunction Of High Pressure Sensor

    Troubleshooting by Indication on the Remote Controller Si39-502A 3.30 “ JA ” Outdoor Unit: Malfunction of High Pressure Sensor Remote Controller Display Applicable RXYQ8~30MY1K (E), YLK (E) Models Method of Malfunction is detected from the pressure detected by the high pressure sensor. Malfunction Detection Malfunction...

  • Page 198: Jc" Outdoor Unit: Malfunction Of Low Pressure Sensor

    Si39-502A Troubleshooting by Indication on the Remote Controller 3.31 “ JC ” Outdoor Unit: Malfunction of Low Pressure Sensor Remote Controller Display Applicable RXYQ8~30MY1K (E), YLK (E) Models Method of Malfunction is detected from pressure detected by low pressure sensor. Malfunction Detection Malfunction...

  • Page 199: 3.32 " L4 " Outdoor Unit

    Troubleshooting by Indication on the Remote Controller Si39-502A 3.32 “ L4 ” Outdoor Unit: Malfunction of Inverter Radiating Fin Temperature Rise Remote Controller Display Applicable RXYQ8~30MY1K (E), YLK (E) Models Method of Fin temperature is detected by the thermistor of the radiation fin. Malfunction Detection Malfunction...

  • Page 200: L5" Outdoor Unit: Inverter Compressor Abnormal

    Si39-502A Troubleshooting by Indication on the Remote Controller 3.33 “ L5 ” Outdoor Unit: Inverter Compressor Abnormal Remote Controller Display Applicable RXYQ8~30MY1K (E), YLK (E) 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.

  • Page 201: L8" Outdoor Unit: Inverter Current Abnormal

    Troubleshooting by Indication on the Remote Controller Si39-502A 3.34 “ L8 ” Outdoor Unit: Inverter Current Abnormal Remote Controller Display Applicable RXYQ8~30MY1K (E), YLK (E) Models Method of Malfunction is detected by current flowing in the power transistor. Malfunction Detection Malfunction When overload in the compressor is detected.

  • Page 202: L9" Outdoor Unit: Inverter Start Up Error

    Si39-502A Troubleshooting by Indication on the Remote Controller 3.35 “ L9 ” Outdoor Unit: Inverter Start up Error Remote Controller Display Applicable RXYQ8~30MY1K (E), YLK (E) 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.

  • Page 203: 3.36 " Lc " Outdoor Unit

    Troubleshooting by Indication on the Remote Controller Si39-502A 3.36 “ LC ” Outdoor Unit: Malfunction of Transmission Between Inverter and Control PC Board Remote Controller Display Applicable RXYQ8~30MY1K (E), YLK (E) Models Method of Check the communication state between inverter PC board and control PC board by micro- computer.
  • Page 204 Si39-502A 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. Are the connectors between the main PC board (A1P), Connect transmission wiring and fan drive PC board (A3P) turn on again.

  • Page 205: P1" Outdoor Unit: Inverter Over-Ripple Protection

    Be sure to explain to the user that Give the user a copy of "notification of inspection results"and leave there is a "power supply imbalance" it up to him to improve the imbalance. for which DAIKIN is not responsible. (V2816) Troubleshooting...

  • Page 206: 3.38 " P4 " Outdoor Unit

    Si39-502A Troubleshooting by Indication on the Remote Controller 3.38 “ P4 ” Outdoor Unit: Malfunction of Inverter Radiating Fin Temperature Rise Sensor Remote Controller Display Applicable RXYQ8~30MY1K (E), YLK (E) Models Method of Resistance of radiation fin thermistor is detected when the compressor is not operating. Malfunction Detection Malfunction...

  • Page 207: Electronic Expansion Valve Failure

    Troubleshooting by Indication on the Remote Controller Si39-502A 3.39 “ UO ” Outdoor Unit: Low Pressure Drop Due to Refrigerant Shortage or Electronic Expansion Valve Failure Remote Controller Display Applicable RXYQ8~30MY1K (E), YLK (E) Models Method of Short of gas malfunction is detected by discharge pipe temperature thermistor. Malfunction Detection Malfunction...

  • Page 208: Reverse Phase, Open Phase

    Si39-502A Troubleshooting by Indication on the Remote Controller 3.40 “ U1 ” Reverse Phase, Open Phase Remote Controller Display Applicable RXYQ8~30MY1K (E), YLK (E) Models 3 phase outdoor unit only Method of The phase of each phase are detected by reverse phase detection circuit and right phase or reverse phase are judged.

  • Page 209: Outdoor Unit: Power Supply Insufficient Or Instantaneous Failure

    Troubleshooting by Indication on the Remote Controller Si39-502A 3.41 “ U2 ” Outdoor Unit: Power Supply Insufficient or Instantaneous Failure Remote Controller Display Applicable RXYQ8~30MY1K (E), YLK (E) Models Method of Detection of voltage of main circuit capacitor built in the inverter and power supply voltage. Malfunction Detection Malfunction...
  • Page 210 Si39-502A 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 voltage of Correct power supply. power supply 380~415V? Turn on again. Does K2 ∗...

  • Page 211: U3" Outdoor Unit: Check Operation Not Executed

    Troubleshooting by Indication on the Remote Controller Si39-502A “ U3 ” Outdoor Unit: 3.42 Check Operation not executed Remote Controller Display Applicable RXYQ8~30MY1K (E), YLK (E) 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 212: Malfunction Of Transmission Between Indoor Units

    Si39-502A Troubleshooting by Indication on the Remote Controller 3.43 “ U4 ” Malfunction of Transmission Between Indoor Units Remote Controller Display Applicable All model of indoor unit Models RXYQ8~30MY1K (E), YLK (E) Method of Microcomputer checks if transmission between indoor and outdoor units is normal. Malfunction Detection Malfunction...
  • Page 213 Troubleshooting by Indication on the Remote Controller Si39-502A 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 214: Remote Controller And Indoor Unit

    Si39-502A Troubleshooting by Indication on the Remote Controller 3.44 “ U5 ” Indoor Unit: Malfunction of Transmission Between Remote Controller and Indoor Unit Remote Controller Display Applicable All models of indoor units 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 215: Indoor Unit: Malfunction Of Transmission Between Outdoor Units

    Troubleshooting by Indication on the Remote Controller Si39-502A 3.45 “ U7 ” Indoor Unit: Malfunction of Transmission Between Outdoor Units Remote Controller Display Applicable All models of indoor units Models Method of Microcomputer checks if transmission between outdoor units. Malfunction Detection Malfunction When transmission is not carried out normally for a certain amount of time...
  • Page 216 Si39-502A 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 the outdoor units multi Fix the outdoor units multi connection transmission connection transmission wiring normal? wiring and reset power.

  • Page 217: U8" Indoor Unit: Malfunction Of Transmission Between

    Troubleshooting by Indication on the Remote Controller Si39-502A 3.46 “ U8 ” Indoor Unit: Malfunction of Transmission Between Main and Sub Remote Controllers Remote Controller Display Applicable All models of indoor units 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 218: Outdoor Units In The Same System

    Si39-502A Troubleshooting by Indication on the Remote Controller 3.47 “ U9 ” Indoor Unit: Malfunction of Transmission Between Indoor and Outdoor Units in the Same System Remote Controller Display Applicable All models of indoor units Models Method of Detect the malfunction signal of any other indoor unit within the system concerned. Malfunction Detection Malfunction...
  • Page 219 Troubleshooting by Indication on the Remote Controller Si39-502A 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 220: And Remote Controller

    Si39-502A Troubleshooting by Indication on the Remote Controller 3.48 “ UA ” Improper Combination of Indoor and Outdoor Units, Indoor Unit and Remote Controller Remote Controller Display Applicable All models of indoor unit RXYQ8~30MY1K (E), YLK (E) Models Remote Controller Method of A difference occurs in data by the type of refrigerant between indoor and outdoor units.

  • Page 221: Uc" Address Duplication Of Centralized Controller

    Troubleshooting by Indication on the Remote Controller Si39-502A 3.49 “ UC ” Address Duplication of Centralized Controller Remote Controller Display Applicable All models of indoor unit Models Centralized controller Method of The principal indoor unit detects the same address as that of its own on any other indoor unit. Malfunction Detection Malfunction...

  • Page 222: Malfunction Of Transmission Between Centralized Controller And Indoor Unit

    Si39-502A Troubleshooting by Indication on the Remote Controller 3.50 “ UE ” Malfunction of Transmission Between Centralized Controller and Indoor Unit Remote Controller Display Applicable All models of indoor units Centralized controller Models Method of Microcomputer checks if transmission between indoor unit and centralized controller is normal. Malfunction Detection Malfunction...
  • Page 223 Troubleshooting by Indication on the Remote Controller Si39-502A 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 removed Reset power supply or its address simultaneously for all optional changed? controllers for centralized...

  • Page 224: Uf" System Is Not Set Yet

    Si39-502A Troubleshooting by Indication on the Remote Controller 3.51 “ UF ” System is not Set yet Remote Controller Display Applicable All models of indoor units Models RXYQ8~30MY1K (E), YLK (E) 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 225: Undefined

    Troubleshooting by Indication on the Remote Controller Si39-502A 3.52 “ UH ” Malfunction of System, Refrigerant System Address Undefined Remote Controller Display Applicable All models of indoor units RXYQ8~30MY1K (E), YLK (E) Models Method of Detect an indoor unit with no address setting. Malfunction Detection Malfunction...

  • Page 226: Troubleshooting (Op: Central Remote Controller)

    Si39-502A Troubleshooting (OP: Central Remote Controller) Troubleshooting (OP: Central Remote Controller) “ M1 ” PC Board Defect Remote Controller Display Applicable Central remote controller Models Method of Detect an abnormality in the DIII-NET polarity circuit. Malfunction Detection Malfunction When + polarity and - polarity are detected at the same time. Decision Conditions Supposed...

  • Page 227: M8" Malfunction Of Transmission Between Optional

    Troubleshooting (OP: Central Remote Controller) Si39-502A “ M8 ” Malfunction of Transmission Between Optional Controllers for Centralized Control Remote Controller Display Applicable Central remote controller Models Method of Detect the malfunction according to DIII-NET transmission data. (The system will be automatically reset.) Malfunction Detection...

  • Page 228: Improper Combination Of Optional Controllerslers For Centralized Controllers

    Si39-502A Troubleshooting (OP: Central Remote Controller) “ MA ” Improper Combination of Optional Controllers for Centralized Control Remote Controller Display Applicable Central remote controller Models Method of Detect the malfunction according to DIII-NET transmission data. Malfunction Detection Malfunction When the schedule timer is set to individual use mode, other central component is present. When multiple master controller are present.
  • Page 229 Troubleshooting (OP: Central Remote Controller) Si39-502A 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 230: Mc" Address Duplication, Improper Setting

    Si39-502A Troubleshooting (OP: Central Remote Controller) “ MC ” Address Duplication, Improper Setting Remote Controller Display Applicable Central remote controller Models Method of Detect the malfunction according to DIII-NET transmission data. Malfunction Detection Malfunction Two units are both set to master controller mode or slave controller mode. Decision Conditions Supposed...

  • Page 231: Troubleshooting (Op: Schedule Timer)

    Troubleshooting (OP: Schedule Timer) Si39-502A Troubleshooting (OP: Schedule Timer) “ UE ” Malfunction of Transmission Between Centralized Controller and Indoor Unit Remote Controller Display Applicable Schedule timer Models All models of indoor units Method of Microcomputer checks if transmission between indoor unit and centralized controller is normal. Malfunction Detection Malfunction...
  • Page 232 Si39-502A Troubleshooting (OP: Schedule Timer) 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 Reset power supply removed or its address simultaneously for all optional changed? controllers for centralized control.

  • Page 233: Pc Board Defect

    Troubleshooting (OP: Schedule Timer) Si39-502A “ M1 ” PC Board Defect Remote Controller Display Applicable Schedule timer Models Method of Detect an abnormality in the DIII-NET polarity circuit. Malfunction Detection Malfunction When + polarity and - polarity are detected at the same time. Decision Conditions Supposed...

  • Page 234: M8" Malfunction Of Transmission Between Optional

    Si39-502A Troubleshooting (OP: Schedule Timer) “ M8 ” Malfunction of Transmission Between Optional Controllers for Centralized Control Remote Controller Display Applicable Schedule timer Models Method of Detect the malfunction according to DIII-NET transmission data. (The system will be automatically reset.) Malfunction Detection Malfunction...

  • Page 235: Improper Combination Of Optional Controllerslers For Centralized Controllers

    Troubleshooting (OP: Schedule Timer) Si39-502A “ MA ” Improper Combination of Optional Controllers for Centralized Control Remote Controller Display Applicable Schedule timer Models Method of Detect the malfunction according to DIII-NET transmission data. Malfunction Detection Malfunction When the schedule timer is set to individual use mode, other central component is present. When multiple master controller are present.
  • Page 236 Si39-502A Troubleshooting (OP: Schedule Timer) 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 Is the wiring adaptor for electrical adaptor for electrical appendices.

  • Page 237: Mc" Address Duplication, Improper Setting

    Troubleshooting (OP: Schedule Timer) Si39-502A “ MC ” Address Duplication, Improper Setting Remote Controller Display Applicable Schedule timer Models Method of Detect the malfunction according to DIII-NET transmission data. Malfunction Detection Malfunction When two or more schedule timers are connected. Decision Conditions Supposed...

  • Page 238: Troubleshooting (Op: Unified On/Off Controller)

    Si39-502A Troubleshooting (OP: Unified ON/OFF Controller) Troubleshooting (OP: 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 Detect the malfunction according to DIII-NET transmission data. Malfunction Detection Malfunction...
  • Page 239 Troubleshooting (OP: Unified ON/OFF Controller) Si39-502A 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 240: Display "Under Centralized Control" Blinks (Repeats Single Blink)

    Si39-502A Troubleshooting (OP: Unified ON/OFF Controller) Display “Under Centralized Control” Blinks (Repeats Single Blink) Remote “under centralized control” (Repeats single blink) Controller Display Applicable Unified ON/OFF controller Central remote controller, Schedule timer Models Method of Detect the malfunction according to DIII-NET transmission data. Malfunction Detection Malfunction...
  • Page 241 Troubleshooting (OP: Unified ON/OFF Controller) Si39-502A 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 controllers for centralized...
  • Page 242 Si39-502A Troubleshooting (OP: Unified ON/OFF Controller) 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 243: Display "Under Centralized Control" Blinks (Repeats Double Blink)

    Troubleshooting (OP: Unified ON/OFF Controller) Si39-502A Display “Under Centralized Control” Blinks (Repeats Double Blink) Remote “under centralized control” (Repeats double blink) Controller Display Applicable Unified ON/OFF controller Models Method of Detect the malfunction according to DIII-NET transmission data. Malfunction Detection Malfunction When no central control addresses are set to indoor units.
  • Page 244 Si39-502A Troubleshooting (OP: Unified ON/OFF Controller) Check No. 1 Check on pulse input of position signal of fan inverter PC board (1) Disconnect the connector X2A while power supply OFF and operation OFF. (2) Is the voltage between pins No. 4 and 5 on X2A approx. 15 V after power supply is turned (3) Connect the connector X2A while power supply OFF and operation OFF.
  • Page 245 Troubleshooting (OP: Unified ON/OFF Controller) Si39-502A Check No. 2 Check on connector of fan motor (Power supply cable) (1) Turn off the power supply. Measure the resistance between phases of U,V,W at the motor side connectors (three-core wire) to check that the values are balanced and there is no short circuiting, while connector or relay connector is disconnected.

  • Page 246: Part 7 Appendix

    Si39-502A Part 7 Part 7 Part 7 Part 7 Appendix Appendix Appendix Appendix 1. Piping Diagrams..................236 1.1 Outdoor Unit ..................236 1.2 Indoor Unit....................237 2. Wiring Diagrams for Reference............242 2.1 Outdoor Unit ..................242 2.2 Field Wiring ..................243 2.3 Indoor Unit....................246 3. List of Electrical and Functional Parts ..........263 3.1 Outdoor Unit ..................263 3.2 Indoor Side ...................264 4.

  • Page 247: Piping Diagrams

    Piping Diagrams Si39-502A 1. Piping Diagrams Outdoor Unit RXYQ8MY1K (E), YLK (E) RXYQ10MY1K (E) , YLK (E) 3D049524 Appendix...

  • Page 248: Indoor Unit

    Si39-502A 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 249 Piping Diagrams Si39-502A FXDQ 4D043864E Refrigerant pipe connection port diameters (mm) Model Liquid φ12.7 φ6.4 FXDQ20N / 25N / 32N / 40N / 50NVE(T) φ15.9 φ9.5 FXDQ63NVE(T) Appendix...
  • Page 250 Si39-502A Piping Diagrams FXUQ + BEVQ Indoor unit 4D037995F Connection Unit 4D034127B Appendix...
  • Page 251 Piping Diagrams Si39-502A FXAQ + BEVQ Indoor unit 4D047084 Connection Unit 4D034127B Appendix...
  • Page 252 Si39-502A Piping Diagrams FXLQ + BEVQ Indoor unit 4D047084 Connection Unit 4D034127B Appendix...

  • Page 253: Wiring Diagrams For Reference

    Wiring Diagrams for Reference Si39-502A 2. Wiring Diagrams for Reference Outdoor Unit RXYQ8MY1K(E), YLK(E) RXYQ10MY1K(E), YLK(E) Appendix...

  • Page 254: Field Wiring

    Si39-502A Wiring Diagrams for Reference Field Wiring RXYQ8MY1K(E), YLK(E) RXYQ10MY1K(E), YLK(E) Appendix...
  • Page 255 Wiring Diagrams for Reference Si39-502A RXYQ16MY1K(E), YLK(E) RXYQ18MY1K(E), YLK(E) RXYQ20MY1K(E), YLK(E) Appendix...
  • Page 256 Si39-502A Wiring Diagrams for Reference RXYQ24MY1K(E), YLK(E) RXYQ26MY1K(E), YLK(E) RXYQ28MY1K(E), YLK(E) RXYQ30MY1K(E), YLK(E) Appendix...

  • Page 257: Indoor Unit

    Wiring Diagrams for Reference Si39-502A Indoor Unit FXCQ20M / 25M / 32M / 63MVE Appendix...
  • Page 258 Si39-502A Wiring Diagrams for Reference FXCQ40M / 50M / 80M / 125MVE Appendix...
  • Page 259 Wiring Diagrams for Reference Si39-502A FXFQ25M / 32M / 40M / 50M / 63M / 80M / 100M / 125MVE Appendix...
  • Page 260 Si39-502A Wiring Diagrams for Reference FXKQ25M / 32M / 40M / 63MVE Appendix...
  • Page 261 Wiring Diagrams for Reference Si39-502A FXDQ20N / 25N / 32N / 40N / 50N / 63NVE (with Drain Pump) Appendix...
  • Page 262 Si39-502A Wiring Diagrams for Reference FXDQ20N / 25N / 32N / 40N / 50N / 63NVET (without Drain Pump) Appendix...
  • Page 263 Wiring Diagrams for Reference Si39-502A FXSQ20M / 25M / 32M / 40M / 50M / 63M / 80M / 100M / 125MVE Appendix...
  • Page 264 Si39-502A Wiring Diagrams for Reference FXMQ40M / 50M / 63M / 80M / 100M / 125MVE Appendix...
  • Page 265 Wiring Diagrams for Reference Si39-502A FXMQ200M / 250MVE Appendix...
  • Page 266 Si39-502A Wiring Diagrams for Reference FXHQ32M / 63M / 100MVE Appendix...
  • Page 267 Wiring Diagrams for Reference Si39-502A FXAQ20M / 25M / 32M / 40M / 50M / 63MVE Appendix...
  • Page 268 Si39-502A Wiring Diagrams for Reference FXLQ20M / 25M / 32M / 40M / 50M / 63MVE FXNQ20M / 25M / 32M / 40M / 50M / 63MVE Appendix...
  • Page 269 Wiring Diagrams for Reference Si39-502A FXUQ71M / 100M / 125MV1 Appendix...
  • Page 270 Si39-502A Wiring Diagrams for Reference FXAQ20MH / 25MH / 32MH / 40MH / 50MHV1 Appendix...
  • Page 271 Wiring Diagrams for Reference Si39-502A FXLQ20MH / 25MH / 32MH / 40MH / 50MHV1 Appendix...
  • Page 272 Si39-502A Wiring Diagrams for Reference BEVQ50MVE Notes 3D046579A Appendix...
  • Page 273 Wiring Diagrams for Reference Si39-502A BEVQ71M / 100M / 125MVE Notes 3D044901A Appendix...

  • Page 274: List Of Electrical And Functional Parts

    Si39-502A List of Electrical and Functional Parts List of Electrical and Functional Parts Outdoor Unit 3.1.1 RXYQ8/10MY1K(E), RXYQ8/10MYLK(E) Model Item Name Symbol RXYQ8/10MY1K(E) RXYQ8/10MYLK(E) Type JT1G-VDKYR@T Inverter OC protection 13.5A device Compressor Type JT170G-KYE@T STD 1 OC protection 15.0A device OC protection Fan motor 1.3A...

  • Page 275: Indoor Side

    List of Electrical and Functional Parts Si39-502A Indoor Side 3.2.1 Indoor Unit Model Parts Name Symbol Remark FXFQ25 FXFQ32 FXFQ40 FXFQ50 FXFQ63 FXFQ80 FXFQ100 FXFQ125 Wired Remote BRC1A61 Option Controller Remote Controller Wireless Remote BRC7E61W Option Controller Fan Motor DC380V 30W 8P DC 380V 120W 8P AC220-240V (50Hz) AC220V (60Hz) Drain Pump...
  • Page 276 Si39-502A List of Electrical and Functional Parts Model Parts Name Symbol Remark FXKQ FXKQ FXKQ FXKQ 25MVE 32MVE 40MVE 63MVE Wired Remote BRC1A61 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 277 List of Electrical and Functional Parts Si39-502A 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 BRC1A62 Controller Remote Option Controller Wireless Remote BRC4C62 Controller AC 220~240V 50Hz 1φ125...
  • Page 278 Si39-502A List of Electrical and Functional Parts Model Parts Name Symbol Remark FXHQ FXHQ FXHQ 32MVE 63MVE 100MVE Wired Remote BRC1A61 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 279 List of Electrical and Functional Parts Si39-502A Model Parts Name Symbol Remark FXLQ FXLQ FXLQ FXLQ FXLQ FXLQ 20MVE 25MVE 32MVE 40MVE 50MVE 63MVE Wired Remote BRC1A62 Controller Remote Option Controller Wireless Remote BRC4C62 Controller AC 220~240V 50Hz Fan Motor 1φ15W 1φ25W 1φ35W...

  • Page 280: Option List

    Si39-502A Option List Option List Option List of Controllers Operation Control System Optional Accessories Type FXLQ-M FXCQ-M FXFQ-M FXKQ-M FXDQ-N FXUQ-M FXSQ-M FXMQ-M FXHQ-M FXAQ-M(H) FXLQ-MH FXNQ-M Item Wireless BRC7C62 BRC7E61W BRC4C61 BRC4C62 BRC7C528W BRC4C62 BRC7E63W BRC7E618 BRC4C62 Remote controller Wired BRC1A61 BRC1A62...
  • Page 281 Option List Si39-502A 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 282: Option Lists (Outdoor Unit)

    Si39-502A Option List Option Lists (Outdoor Unit) RXYQ8/10MY1K(E), YLK(E) RXYQ8MY1K, YLK RXYQ8MY1KE, YLKE Optional accessories RXYQ10MY1K, YLK RXYQ10MY1KE, YLKE KRC19-26A Cool/Heat Selector Fixing box KJB111A KHRP26M22H, KHRP26M33H, Refnet header (Max. 4 branch) (Max. 8 branch) Refnet joint KHRP26M22T, KHRP26M33T KWC26B450 KWC26B450E Central drain pan kit RXYQ16 ~ 30MY1K(E), YLK (E)

  • Page 283: Piping Installation Point

    Piping Installation Point Si39-502A Piping Installation Point NOTE • The outdoor unit multi connection piping kit that is sold separately as an option (BHFP22M90 · 135K) is necessary for the multi installation of outdoor units. See the installation manual attached to the kit with attention to installation restrictions described in “connecting the refrigerant piping”...
  • Page 284 Si39-502A Piping Installation Point Prohibited pattern to indoor unit to indoor unit Oil remains in the stopping outdoor unit. Change to pattern 1 or pattern 2 Unit A Unit B Unit A Unit B Unit C Unit C to indoor unit to indoor unit Oil remains in the outdoor unit C when the system stops.
  • Page 285 Piping Installation Point Si39-502A Appendix...

  • Page 286: Selection Of Pipe Size, Joints And Header

    Si39-502A Selection of Pipe Size, Joints and Header Selection of Pipe Size, Joints and Header Example of connection (R-410A Type) RXYQ8~30M (Heat Pump) R-410A. Appendix...
  • Page 287 Selection of Pipe Size, Joints and Header Si39-502A ∗Note 1 When overall equivalent pipe length is 90 m or more, the size of the main gas and liquid pipes (Outdoor unit-first branch kit) must be increased. Diameter of above case If available on the site, use this size.

  • Page 288: Thermistor Resistance / Temperature Characteristics

    Si39-502A Thermistor Resistance / Temperature Characteristics Thermistor Resistance / Temperature Characteristics Indoor unit For air suction For liquid pipe For gas pipe Outdoor unit for fin thermistor Outdoor unit For outdoor air For coil For suction pipe For Receiver gas pipe For Receiver outlet liquid pipe (kΩ) T°C...
  • Page 289 Thermistor Resistance / Temperature Characteristics Si39-502A Outdoor Unit Thermistors for Discharge Pipe (R3T, R31T, R32T) (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...

  • Page 290: Pressure Sensor

    Si39-502A 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 291: Method Of Replacing The Inverter's Power Transistors And Diode Modules

    Method of Replacing The Inverter’s Power Transistors and Diode Modules Si39-502A Method of Replacing The Inverter’s Power Transistors and Diode Modules Method of Replacing The Inverter’s Power Transistors and Diode Modules Inverter PC Board Inverter PC board (A2P) PC0409 Fasten Tab X11A Electronic circuit IGBT...
  • Page 292 Si39-502A Method of Replacing The Inverter’s Power Transistors and Diode Modules Power Transistor IGBT (On Inverter PC Board) (Decision) If other than given above, the power unit is defective and must be replaced. Note: Above figures are measured by analogue tester. Make sure to set “Tester Range” to “x 1k”. Diode Module (Decision) If other than given above, the diode module is defective and must be replaced.
  • Page 293 Method of Replacing The Inverter’s Power Transistors and Diode Modules Si39-502A Appendix...

  • Page 294: Part 8 Precautions For New Refrigerant (R-410A)

    Si39-502A Part 8 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) .........284 1.1 Outline ....................284 1.2 Refrigerant Cylinders................286 1.3 Service Tools..................287 Precautions for New Refrigerant (R-410A)

  • Page 295: Precautions For New Refrigerant (R-410A)

    Precautions for New Refrigerant (R-410A) Si39-502A 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 296 Si39-502A 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 297: Refrigerant Cylinders

    Precautions for New Refrigerant (R-410A) Si39-502A 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 298: Service Tools

    Si39-502A 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. Therefore, gauge manifolds and charge hoses that are used with a previous refrigerant (R-22, R-407C) can not be used for products that use new refrigerants.
  • Page 299 Precautions for New Refrigerant (R-410A) Si39-502A 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 300 Si39-502A 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 301 Precautions for New Refrigerant (R-410A) Si39-502A 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 302 Si39-502A 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 303 Precautions for New Refrigerant (R-410A) Si39-502A 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 304: Index

    Si39-502A Index Index Index Index Drain Level above Limit ........160 Drain Pump Control ..........78 A0 .................151 A1 .................152 A3 .................153 E1 ................ 166 A6 .................155 E3 ................ 167 A7 .................156 E4 ................ 168 A9 .................158 E5 ................ 169 Abnormal Discharge Pipe Temperature ....176 E6 ................
  • Page 305 Si39-502A Malfunction of Thermostat Sensor in Remote Controller ............165 L4 .................188 Malfunction of Transmission Between Centralized L5 .................189 Controller and Indoor Unit ....211, 220 L8 .................190 Malfunction of Transmission Between Indoor and L9 .................191 Outdoor Units in the Same System ....207 LC .................192 Malfunction of Transmission Between List of Electrical and Functional Parts ....263...
  • Page 306 Si39-502A Selection of Pipe Size, Joints and Header ...275 Service Tools ............287 Setting by pushbutton switches ......110 Setting Contents and Code No......97 Setting of Low Noise Operation and Demand Operation ............123 Setting of Refrigerant Additional Charging Operation ............129 Special Control ............60 Specifications ............8 Indoor Units .............16 Outdoor Units ............8...
  • Page 307 Si39-502A Index...

  • Page 308: Drawings & Flow Charts

    Si39-502A Drawings & Flow Charts Drawings & Flow Charts Drawings & Flow Charts Drawings & Flow Charts Improper Combination of Optional Controllers for Centralized Control ......217 Abnormal Discharge Pipe Temperature ....176 Inverter Compressor Abnormal ......189 Abnormal Outdoor Fan Motor Signal ....178 Inverter Current Abnormal ........
  • Page 309 Si39-502A Malfunction of Transmission Between Indoor and Outdoor Units in the Same System ....207 Test Operation ............88 Malfunction of Transmission Between Thermostat Sensor in Remote Controller ....81 Indoor Units ...........201 Cooling ............81 Malfunction of Transmission Between Inverter and Heating ............
  • Page 310 Improper installation can result in water or refrigerant leakage, electrical shock, fire or explosion. Use only those parts and accessories supplied or specified by Daikin. Ask a qualified installer or contractor to install those parts and accessories. Use of unauthorized parts and accessories or improper installation of parts and accessories can result in water or refrigerant leakage, electrical shock, fire or explosion.

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