Daikin VRV III REYQ8PY1 Service Manual
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Daikin VRV III REYQ8PY1 Service Manual

R-410a heat recovery 50hz
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Si37 - 701
REYQ8-48PY1
R-410A Heat Recovery 50Hz

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Summary of Contents for Daikin VRV III REYQ8PY1

  • Page 1 Si37 - 701 REYQ8-48PY1 R-410A Heat Recovery 50Hz...

  • Page 2: Table Of Contents

    Si37-701 R-410A Heat Recovery 50Hz 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 Si37-701 Electronic Expansion Valve PI Control..........108 2.4 Step Control of Outdoor Unit Fans ............108 2.5 Outdoor Unit Fan Control in Cooling Operation ........109 2.6 Heat Exchanger Control ...............110 Special Control..................111 Startup Control ..................111 3.2 Large Capacity Start Up Control (Heating)...........113 Oil Return Operation ................114 Defrost Operation .................118 Pump-down Residual Operation ............120...
  • Page 4 Si37-701 Part 6 Troubleshooting ............. 209 1. Symptom-based Troubleshooting ............212 2. Troubleshooting by Remote Controller ..........215 2.1 The INSPECTION / TEST Button............215 2.2 Self-diagnosis by Wired Remote Controller .........216 2.3 Self-diagnosis by Wireless Remote Controller ........217 2.4 Inspection Mode ...................220 2.5 Remote Controller Service Mode ............221 2.6 Test Run Mode..................223 2.7 Remote Controller Self-Diagnosis Function .........223...
  • Page 5 Si37-701 J5 ” Outdoor Unit: 3.28 “ Malfunction of Thermistor (R8T or R10T) for Suction Pipe ..................274 J6 ” Outdoor Unit: 3.29 “ Malfunction of Thermistor (R4T or R12T) for Outdoor Unit Heat Exchanger ..............275 J7 ” Outdoor Unit: 3.30 “...
  • Page 6 Si37-701 4. Troubleshooting (OP: Central Remote Controller) ......336 M1 ” “ PC Board Defect ................336 M8 ” “ Malfunction of Transmission between Optional Controllers for Centralized Control................337 MA ” “ Improper Combination of Optional Controllers for Centralized Control................338 MC ” “...

  • Page 7: Introduction

    Introduction Si37-701 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 Si37-701 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 Si37-701 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 Si37-701 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 2007 VRVIII series Heat Recovery 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

    Si37-701 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. Model Selection..................6 General Information...

  • Page 13: Model Names Of Indoor/Outdoor Units

    Model Names of Indoor/Outdoor Units Si37-701 1. Model Names of Indoor/Outdoor Units Indoor Units Power Type Model Name Supply Ceiling Mounted FXCQ — 125M — — — — Cassette Type (Double Flow) Ceiling Mounted FXFQ — 100M 125M — — —...

  • Page 14: External Appearance

    Si37-701 External Appearance 2. External Appearance Indoor Units Ceiling Mounted Cassette Type (Double Flow) Ceiling Mounted Duct Type FXCQ20M FXMQ40MA FXCQ25M FXMQ50MA FXCQ32M FXMQ63MA FXCQ40M FXMQ80MA FXMQ40~125M FXCQ50M FXMQ100MA FXCQ63M FXMQ125MA FXCQ80M FXMQ200MA FXCQ125M FXMQ250MA FXMQ200 · 250M Ceiling Mounted Cassette Ceiling Suspended Type Type (Multi Flow) FXHQ32MA...

  • Page 15: Outdoor Units

    External Appearance Si37-701 Outdoor Units REYQ8P, 10P, 12P, 14P, 16P REYQ18P, 20P, 22P, 24P 8, 10, 12, 14, 16 HP 18, 20, 22, 24 HP 22.4 ~ 40.0, 45.0 kW 50.4 ~ 67.0 kW REYQ26P, 28P REYQ30P, 32P REYQ34P, 36P, 38P, 40P 26, 28 HP 30, 32 HP 34, 36, 38, 40 HP...

  • Page 16: Combination Of Outdoor Units

    38HP ●● ● 40HP Heat Recovery: BHFP26P136 ● ●● 42HP ● ●● 44HP ● ●● 46HP ●●● 48HP Note: For multiple connection of 18HP system or more, an optional Daikin Outdoor Unit Multi Connection Piping Kit is required. General Information...

  • Page 17: Model Selection

    Model Selection Si37-701 4. Model Selection VRV III Heat Recovery Series Connectable indoor units number and capacity 10HP 12HP 14HP 16HP 18HP 20HP System name REYQ8P REYQ10P REYQ12P REYQ14P REYQ16P REYQ18P REYQ20P Outdoor unit 1 REYQ8P REYQ10P REYQ12P REYQ14P REYQ16P REMQ8P REMQ8P Outdoor unit 2...
  • Page 18 Si37-701 Model Selection Connectable Indoor Unit Power Type Model Name Supply Ceiling Mounted FXCQ — 125M — — — — Cassette Type (Double Flow) Ceiling Mounted FXFQ — 100M 125M — — — — Cassette Type (Multi Flow) 600×600 Ceiling FXZQ 20M8 25M8 32M8 40M8 50M8 —...
  • Page 19 Model Selection Si37-701 Differences from Conventional Models Differences Item Object New model (P Model) Conventional model (M Model) NONE Compressor Connection of equalizer oil pipe (No particular changes in terms of service) Equalizer oil pipe for multi- NONE outdoor-unit system Refilling quantity due to piping Refilling quantity due to piping Workability...

  • Page 20: Part 2 Specifications

    Si37-701 Part 2 Specifications Specifications ..................10 Outdoor Units ..................10 Indoor Units ....................21 1.3 BS Units ....................47 Specifications...

  • Page 21: Specifications

    Specifications Si37-701 Specifications Outdoor Units Heat Recovery 50Hz <REYQ-P> Model Name REYQ8PY1(E) REYQ10PY1(E) kcal / h 19,400 24,300 ★ 1 Cooling Capacity (19.5°CWB) Btu / h 76,800 96,200 22.5 28.2 ★ 2 Cooling Capacity (19.0°CWB) 22.4 28.0 kcal / h 21,500 27,100 ★...
  • Page 22 Si37-701 Specifications Model Name REYQ12PY1(E) REYQ14PY1(E) kcal / h 29,000 35,500 ★ 1 Cooling Capacity (19.5°CWB) Btu / h 115,000 141,000 33.7 41.3 ★ 2 Cooling Capacity (19.0°CWB) 33.5 40.0 kcal / h 32,300 38,700 ★ 3 Heating Capacity Btu / h 128,000 154,000 37.5...
  • Page 23 Specifications Si37-701 Model Name REYQ16PY1(E) kcal / h 40,000 ★ 1 Cooling Capacity (19.5°CWB) Btu / h 159,000 46.5 ★ 2 Cooling Capacity (19.0°CWB) 45.0 kcal / h 43,000 ★ 3 Heating Capacity Btu / h 171,000 50.0 Y1 Type Ivory White 5Y7.5/1 Casing Color Y1E Type...
  • Page 24 Si37-701 Specifications Model Name (Combination Unit) REYQ18PY1(E) REYQ20PY1(E) Model Name (Independent Unit) REMQ8PY1(E)+REMQ10PY1(E) REMQ8PY1(E)+REMQ12PY1(E) kcal / h 43,600 48,300 ★ 1 Cooling Capacity (19.5°CWB) Btu / h 173,000 192,000 50.7 56.2 ★ 2 Cooling Capacity (19.0°CWB) 50.4 55.9 kcal / h 48,600 53,800 ★...
  • Page 25 Specifications Si37-701 Model Name (Combination Unit) REYQ22PY1(E) REYQ24PY1(E) Model Name (Independent Unit) REMQ10PY1(E)+REMQ12PY1(E) REMQ12PY1(E)+REMQ12PY1(E) kcal / h 53,200 58,000 ★ 1 Cooling Capacity (19.5°CWB) Btu / h 211,000 230,000 61.9 67.4 ★ 2 Cooling Capacity (19.0°CWB) 61.5 67.0 kcal / h 59,300 64,500 ★...
  • Page 26 Si37-701 Specifications Model Name (Combination Unit) REYQ26PY1(E) REYQ28PY1(E) Model Name (Independent Unit) REMQ10PY1(E)+REMQ16PY1(E) REMQ12PY1(E)+REMQ16PY1(E) kcal / h 63,100 67,900 ★ 1 Cooling Capacity (19.5°CWB) Btu / h 250,000 270,000 73.4 79.0 ★ 2 Cooling Capacity (19.0°CWB) 73.0 78.5 kcal / h 70,100 75,300 ★...
  • Page 27 Specifications Si37-701 Model Name (Combination Unit) REYQ30PY1(E) REYQ32PY1(E) Model Name (Independent Unit) REMQ14PY1(E)+REMQ16PY1(E) REMQ16PY1(E)+REMQ16PY1(E) kcal / h 73,500 77,800 ★ 1 Cooling Capacity (19.5°CWB) Btu / h 292,000 309,000 85.5 90.5 ★ 2 Cooling Capacity (19.0°CWB) 85.0 90.0 kcal / h 81,700 86,000 ★...
  • Page 28 Si37-701 Specifications Model Name (Combination Unit) REYQ34PY1(E) REYQ36PY1(E) Model Name (Independent Unit) REMQ8PY1(E)+REMQ10PY1(E)+REMQ16PY1(E) REMQ8PY1(E)+REMQ12PY1(E)+REMQ16PY1(E) kcal / h 82,600 87,700 ★ 1 Cooling Capacity (19.5°CWB) Btu / h 328,000 348,000 96.0 ★ 2 Cooling Capacity (19.0°CWB) 95.4 kcal / h 92,000 97,200 ★...
  • Page 29 Specifications Si37-701 Model Name (Combination Unit) REYQ38PY1(E) REYQ40PY1(E) Model Name (Independent Unit) REMQ10PY1(E)+REMQ12PY1(E)+REMQ16PY1(E) REMQ12PY1(E)+REMQ12PY1(E)+REMQ16PY1(E) kcal / h 92,900 97,200 ★ 1 Cooling Capacity (19.5°CWB) Btu / h 368,000 386,000 ★ 2 Cooling Capacity (19.0°CWB) kcal / h 102,000 108,000 ★ 3 Heating Capacity Btu / h 406,000...
  • Page 30 Si37-701 Specifications Model Name (Combination Unit) REYQ42PY1(E) REYQ44PY1(E) Model Name (Independent Unit) REMQ10PY1(E)+REMQ16PY1(E)+REMQ16PY1(E) REMQ12PY1(E)+REMQ16PY1(E)+REMQ16PY1(E) kcal / h 102,000 108,000 ★ 1 Cooling Capacity (19.5°CWB) Btu / h 406,000 427,000 ★ 2 Cooling Capacity (19.0°CWB) kcal / h 114,000 119,000 ★ 3 Heating Capacity Btu / h 450,000...
  • Page 31 Specifications Si37-701 Model Name (Combination Unit) REYQ46PY1(E) REYQ48PY1(E) Model Name (Independent Unit) REMQ14PY1(E)+REMQ16PY1(E)+REMQ16PY1(E) REMQ16PY1(E)+REMQ16PY1(E)+REMQ16PY1(E) kcal / h 113,000 117,000 ★ 1 Cooling Capacity (19.5°CWB) Btu / h 447,000 464,000 ★ 2 Cooling Capacity (19.0°CWB) kcal / h 124,000 129,000 ★ 3 Heating Capacity Btu / h 495,000...

  • Page 32: Indoor Units

    Si37-701 Specifications 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 ★...
  • Page 33 Specifications Si37-701 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 ★...
  • Page 34 Si37-701 Specifications 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...
  • Page 35 Specifications Si37-701 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 ★...
  • Page 36 Si37-701 Specifications 600×600 Ceiling Mounted Cassette Type (Multi Flow) Model FXZQ20M8V1B FXZQ25M8V1B FXZQ32M8V1B kcal/h 2,000 2,500 3,150 ★ 1 Cooling Capacity (19.5°CWB) Btu/h 7,900 9,900 12,500 ★ 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...
  • Page 37 Specifications Si37-701 600×600 Ceiling Mounted Cassette Type (Multi Flow) Model FXZQ40M8V1B FXZQ50M8V1B kcal/h 4,000 5,000 ★ 1 Cooling Capacity (19.5°CWB) Btu/h 15,900 19,900 ★ 2 Cooling Capacity (19.0°CWB) kcal/h 4,300 5,400 ★ 3 Heating Capacity Btu/h 17,000 21,500 Casing Galvanized Steel Plate Galvanized Steel Plate Dimensions: (H×W×D) 260×575×575...
  • Page 38 Si37-701 Specifications Ceiling Mounted Cassette Corner Type Model FXKQ25MAVE FXKQ32MAVE FXKQ40MAVE FXKQ63MAVE kcal/h 2,500 3,200 4,000 6,300 ★ 1 Cooling Capacity (19.5°CWB) Btu/h 9,900 12,600 16,000 24,900 ★ 2 Cooling Capacity (19.0°CWB) kcal/h 2,800 3,400 4,300 6,900 ★ 3 Heating Capacity Btu/h 10,900 13,600...
  • Page 39 Specifications Si37-701 Slim Ceiling Mounted Duct Type (with Drain Pump) Model FXDQ20NAVE FXDQ25NAVE FXDQ32NAVE kcal/h 2,000 2,500 3,200 ★ 1 Cooling Capacity (19.5°CWB) Btu/h 7,800 9,900 12,600 ★ 2 Cooling Capacity (19.0°CWB) kcal/h 2,200 2,800 3,400 ★ 3 Heating Capacity Btu/h 8,500 10,900...
  • Page 40 Si37-701 Specifications Slim Ceiling Mounted Duct Type (with Drain Pump) Model FXDQ40NAVE FXDQ50NAVE FXDQ63NAVE kcal/h 4,000 5,000 6,300 ★ 1 Cooling Capacity (19.5°CWB) Btu/h 16,000 19,800 24,900 ★ 2 Cooling Capacity (19.0°CWB) kcal/h 4,300 5,400 6,900 ★ 3 Heating Capacity Btu/h 17,100 21,500...
  • Page 41 Specifications Si37-701 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...
  • Page 42 Si37-701 Specifications 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...
  • Page 43 Specifications Si37-701 Slim Ceiling Mounted Duct Type (PVE: with Drain Pump PVET: without Drain Pump) FXDQ20PVE FXDQ25PVE FXDQ32PVE Model FXDQ20PVET FXDQ25PVET FXDQ32PVET kcal/h 2,000 2,500 3,200 ★ 1 Cooling Capacity (19.5°CWB) Btu/h 7,800 9,900 12,600 ★ 2 Cooling Capacity (19.0°CWB) kcal/h 2,200 2,800...
  • Page 44 Si37-701 Specifications Ceiling Concealed (Duct) Type (Australia exclusive use) Model FXDYQ80MV1 FXDYQ100MV1 FXDYQ125MV1 FXDYQ145MV1 kcal/h 8,000 10,000 12,500 14,500 ★ 1 Cooling Capacity (19.5°CWB) Btu/h 31,700 39,600 49,500 57,700 11.6 14.5 16.9 ★ 2 Cooling Capacity (19.0°CWB) 11.2 14.0 16.2 kcal/h 8,600 10,800...
  • Page 45 Specifications Si37-701 Model FXDYQ180MV1 FXDYQ200MV1 FXDYQ250MV1 kcal/h 17,700 19,800 24,800 ★ 1 Cooling Capacity (19.5°CWB) Btu/h 70,300 78,500 98,300 20.6 23.0 28.8 ★ 2 Cooling Capacity (19.0°CWB) 20.0 22.4 28.0 kcal/h 19,300 21,500 27,000 ★ 3 Heating Capacity Btu/h 76,400 85,300 107,500 22.4...
  • Page 46 Si37-701 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...
  • Page 47 Specifications Si37-701 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...
  • Page 48 Si37-701 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...
  • Page 49 Specifications Si37-701 Ceiling Mounted Duct Type Model FXMQ40MAVE FXMQ50MAVE FXMQ63MAVE FXMQ80MAVE kcal/h 4,000 5,000 6,300 8,000 ★ 1 Cooling Capacity (19.5°CWB) Btu/h 16,000 19,800 24,900 31,700 ★ 2 Cooling Capacity (19.0°CWB) kcal/h 4,300 5,400 6,900 8,600 ★ 3 Heating Capacity Btu/h 17,100 21,500...
  • Page 50 Si37-701 Specifications Ceiling Mounted Duct Type Model FXMQ100MAVE FXMQ125MAVE FXMQ200MAVE FXMQ250MAVE 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...
  • Page 51 Specifications Si37-701 Ceiling Suspended Type Model FXHQ32MAVE FXHQ63MAVE FXHQ100MAVE kcal/h 3,200 6,300 10,000 ★ 1 Cooling Capacity (19.5°CWB) Btu/h 12,600 24,900 39,600 11.6 ★ 2 Cooling Capacity (19.0°CWB) 11.2 kcal/h 3,400 6,900 10,800 ★ 3 Heating Capacity Btu/h 13,600 27,300 42,700 12.5 Casing Color...
  • Page 52 Si37-701 Specifications Wall Mounted Type Model FXAQ20MAVE FXAQ25MAVE FXAQ32MAVE kcal/h 2,000 2,500 3,200 ★ 1 Cooling Capacity (19.5°CWB) Btu/h 7,800 9,900 12,600 ★ 2 Cooling Capacity (19.0°CWB) kcal/h 2,200 2,800 3,400 ★ 3 Heating Capacity Btu/h 8,500 10,900 13,600 Casing Color White (3.0Y8.5/10.5) White (3.0Y8.5/10.5) White (3.0Y8.5/10.5)
  • Page 53 Specifications Si37-701 Wall Mounted Type Model FXAQ40MAVE FXAQ50MAVE FXAQ63MAVE kcal/h 4,000 5,000 6,300 ★ 1 Cooling Capacity (19.5°CWB) Btu/h 16,000 19,800 24,900 ★ 2 Cooling Capacity (19.0°CWB) kcal/h 4,300 5,400 6,900 ★ 3 Heating Capacity Btu/h 17,100 21,500 27,300 Casing Color White (3.0Y8.5/10.5) White (3.0Y8.5/10.5) White (3.0Y8.5/10.5)
  • Page 54 Si37-701 Specifications Floor Standing Type Model FXLQ20MAVE FXLQ25MAVE FXLQ32MAVE kcal/h 2,000 2,500 3,200 ★ 1 Cooling Capacity (19.5°CWB) Btu/h 7,800 9,900 12,600 ★ 2 Cooling Capacity (19.0°CWB) kcal/h 2,200 2,800 3,400 ★ 3 Heating Capacity Btu/h 8,500 10,900 13,600 Casing Color Ivory White (5Y7.5/1) Ivory White (5Y7.5/1) Ivory White (5Y7.5/1)
  • Page 55 Specifications Si37-701 Floor Standing Type Model FXLQ40MAVE FXLQ50MAVE FXLQ63MAVE kcal/h 4,000 5,000 6,300 ★ 1 Cooling Capacity (19.5°CWB) Btu/h 16,000 19,800 24,900 ★ 2 Cooling Capacity (19.0°CWB) kcal/h 4,300 5,400 6,900 ★ 3 Heating Capacity Btu/h 17,100 21,500 27,300 Casing Color Ivory White (5Y7.5/1) Ivory White (5Y7.5/1) Ivory White (5Y7.5/1)
  • Page 56 Si37-701 Specifications Concealed Floor Standing Type Model FXNQ20MAVE FXNQ25MAVE FXNQ32MAVE kcal/h 2,000 2,500 3,200 ★ 1 Cooling Capacity (19.5°CWB) Btu/h 7,800 9,900 12,600 ★ 2 Cooling Capacity (19.0°CWB) kcal/h 2,200 2,800 3,400 ★ 3 Heating Capacity Btu/h 8,500 10,900 13,600 Casing Color Galvanized Steel Plate Galvanized Steel Plate...
  • Page 57 Specifications Si37-701 Concealed Floor Standing Type Model FXNQ40MAVE FXNQ50MAVE FXNQ63MAVE kcal/h 4,000 5,000 6,300 ★ 1 Cooling Capacity (19.5°CWB) Btu/h 16,000 19,800 24,900 ★ 2 Cooling Capacity (19.0°CWB) kcal/h 4,300 5,400 6,900 ★ 3 Heating Capacity Btu/h 17,100 21,500 27,300 Casing Color Galvanized Steel Plate Galvanized Steel Plate...

  • Page 58: Bs Units

    Si37-701 Specifications BS Units Model BSVQ100PV1 BSVQ160PV1 BSVQ250PV1 Power Supply 1 Phase 50Hz 200-240V 1 Phase 50Hz 200-240V 1 Phase 50Hz 200-240V Total Capacity Index of Indoor Unit 20 to 100 More than 100 but 160 or less More than 160 but 250 or less No.
  • Page 59 Specifications Si37-701 Specifications...

  • Page 60: Part 3 Refrigerant Circuit

    Si37-701 Part 3 Refrigerant Circuit Refrigerant Circuit .................50 REYQ8P, 10P, 12P ................50 REYQ14P, 16P ..................52 REMQ8PY1 (Multi 8HP).................54 REMQ10PY1, 12PY1 (Multi 10, 12HP) ..........56 REMQ14PY1, 16PY1 (Multi 14, 16HP) ..........58 1.6 BS Unit Functional Parts ................60 1.7 Indoor Units ....................61 Functional Parts Layout ................62 REYQ8P, 10P, 12P ................62 REYQ14P, 16P ..................63...

  • Page 61: Refrigerant Circuit

    Refrigerant Circuit Si37-701 Refrigerant Circuit REYQ8P, 10P, 12P No. in refrigerant Symbol Name Major Function system diagram Inverter compressor (INV) Inverter compressor is operated on frequencies between 52Hz and 210Hz by using the inverter, while Standard compressor is operated with commercial power supply only.
  • Page 62 Si37-701 Refrigerant Circuit REYQ8P, 10P, 12P (8HP, 10HP, 12HP Single Type) (INV Unit + STD Unit) Liquid Subcool Heat Exchanger 2 Pipe Left Stop Valve Heat Exchanger 2 Dual Pressure Gas Pipe Stop Valve S2PH Suction Pipe Stop Valve Subcool Heat Exchanger 1 Right Heat Exchanger 1 Gauge Port...

  • Page 63: Reyq14P, 16P

    Refrigerant Circuit Si37-701 REYQ14P, 16P No. in refrigerant Symbol Name Major Function system diagram Inverter compressor (INV1) Inverter compressor is operated on frequencies between 52Hz and 266Hz by using the inverter. The number of operating steps is as follows. REYQ14P or 16P : 26 step Standard compressor 1 (INV2) Since the system is of air heat exchanging type, the fan is operated at 9-step rotation Inverter fan...
  • Page 64 Si37-701 Refrigerant Circuit REYQ14P, 16P (14HP, 16HP Single Type) (INV Unit × 2) Liquid Subcool Heat Exchanger 2 Pipe Left Stop Valve Heat Exchanger 2 Dual Pressure Gas Pipe Stop Valve S2PH INV2 Suction Pipe Stop Valve Subcool Heat Exchanger 1 Liquid Pipe Right Heat Exchanger 1...

  • Page 65: Remq8Py1 (Multi 8Hp)

    Refrigerant Circuit Si37-701 REMQ8PY1 (Multi 8HP) No. in refrigerant Symbol Name Major Function system diagram Inverter compressor is operated on frequencies between 52Hz and 210Hz by using Inverter compressor (INV) the inverter. Compressor operation steps : Refer to page 104~107. Since the system is of air heat exchanging type, the fan is operated at 9-step rotation Inverter fan speed by using the inverter.
  • Page 66 Si37-701 Refrigerant Circuit REMQ8PY1 Stop Valve Liquid Pipe S1NPH Stop Valve Equalizing Pipe Stop Valve Dual Pressure Gas Pipe S1PH S2NPL Gauge Port Stop Valve Suction Pipe Refrigerant Circuit...

  • Page 67: Remq10Py1, 12Py1 (Multi 10, 12Hp)

    Refrigerant Circuit Si37-701 REMQ10PY1, 12PY1 (Multi 10, 12HP) No. in refrigerant Symbol Name Major Function system diagram Inverter compressor (INV) Inverter compressor is operated on frequencies between 52Hz and 210Hz by using the inverter, while Standard compressor is operated with commercial power supply only.
  • Page 68 Si37-701 Refrigerant Circuit REMQ10PY1, 12PY1 Stop Valve Liquid Pipe S1NPH Stop Valve Equalizing Pipe Stop Valve Dual Pressure Gas Pipe S1PH S2PH S2NPL Gauge Port Stop Valve Suction Pipe Refrigerant Circuit...

  • Page 69: Remq14Py1, 16Py1 (Multi 14, 16Hp)

    Refrigerant Circuit Si37-701 REMQ14PY1, 16PY1 (Multi 14, 16HP) No. in refrigerant Symbol Name Major Function system diagram Inverter compressor (INV) Inverter compressor is operated on frequencies between 52Hz and 210Hz by using the inverter, while Standard compressor is operated with commercial power supply only. The number of Standard compressor 1 (STD1) operating steps is as follows when Inverter compressor is operated in combination with Standard compressor.
  • Page 70 Si37-701 Refrigerant Circuit REMQ14PY1, 16PY1 Stop Valve Liquid Pipe S1NPH Stop Valve Equalizing Pipe Stop Valve Dual Pressure Gas Pipe S1PH S2PH S3PH S2NPL Gauge Port Stop Valve Suction Pipe Refrigerant Circuit...

  • Page 71: Bs Unit Functional Parts

    Refrigerant Circuit Si37-701 BS Unit Functional Parts BSVQ100,160,250PV1 Name Symbol Function Electronic expansion valve (EVH) Opens while in heating operation or all indoor units are in cooling operation. (Max : 760pls) Electronic expansion valve (EVL) Opens while in cooling operation. (Max : 760pls) Electronic expansion valve (EVHS) Opens while in heating operation or all indoor units are in cooling operation.

  • Page 72: Indoor Units

    Si37-701 Refrigerant Circuit Indoor Units FXCQ, FXFQ, FXZQ, FXKQ, FXDQ, FXDYQ, FXSQ, FXMQ, FXHQ, FXAQ, FXLQ, FXNQ Gas-side Piping Liquid-side Piping Electronic Filter Filter Expansion Valve Name Symbol Function Used to control superheated degree of gas when Electronic cooling and subcooled degree when heating. (Max. expansion valve 2000 pls) Suction air...

  • Page 73: Functional Parts Layout

    Functional Parts Layout Si37-701 Functional Parts Layout REYQ8P, 10P, 12P Plan Front View Note: For reference numbers, refer to page 50. Refrigerant Circuit...

  • Page 74: Reyq14P, 16P

    Si37-701 Functional Parts Layout REYQ14P, 16P Plan Front View Note: For reference numbers, refer to page 52. Refrigerant Circuit...

  • Page 75: Remq8P

    Functional Parts Layout Si37-701 REMQ8P Plan REFRIGERANT REGULATOR Front View Note: For reference numbers, refer to page 54. Refrigerant Circuit...

  • Page 76: Remq10P, 12P

    Si37-701 Functional Parts Layout REMQ10P, 12P Plan REFRIGERANT REGULATOR Front View Note: For reference number, refer to page 56. Refrigerant Circuit...

  • Page 77: Remq14P, 16P

    Functional Parts Layout Si37-701 REMQ14P, 16P Plan REFRIGERANT REGULATOR Front View Note: For reference number, refer to page 58. Refrigerant Circuit...

  • Page 78: Refrigerant Flow For Each Operation Mode

    Si37-701 Refrigerant Flow for Each Operation Mode Refrigerant Flow for Each Operation Mode REYQ8P, 10P, 12P Cooling Operation Refrigerant Circuit...
  • Page 79 Refrigerant Flow for Each Operation Mode Si37-701 Heating Operation Refrigerant Circuit...
  • Page 80 Si37-701 Refrigerant Flow for Each Operation Mode Simultaneous Cooling / Heating Operation Refrigerant Circuit...
  • Page 81 Refrigerant Flow for Each Operation Mode Si37-701 Cooling Oil Return Operation Refrigerant Circuit...
  • Page 82 Si37-701 Refrigerant Flow for Each Operation Mode Heating Oil Return Operation Refrigerant Circuit...
  • Page 83 Refrigerant Flow for Each Operation Mode Si37-701 Oil Return Operation at Simultaneous Cooling / Heating Operation Refrigerant Circuit...
  • Page 84 Si37-701 Refrigerant Flow for Each Operation Mode Partial Defrosting 1 (Defrosting in the Right Unit) Refrigerant Circuit...
  • Page 85 Refrigerant Flow for Each Operation Mode Si37-701 Partial Defrosting 2 (Defrosting in the Left Unit) Refrigerant Circuit...
  • Page 86 Si37-701 Refrigerant Flow for Each Operation Mode REYQ14P, 16P Cooling Operation Refrigerant Circuit...
  • Page 87 Refrigerant Flow for Each Operation Mode Si37-701 Heating Operation Refrigerant Circuit...
  • Page 88 Si37-701 Refrigerant Flow for Each Operation Mode Simultaneous Cooling / Heating Operation Refrigerant Circuit...
  • Page 89 Refrigerant Flow for Each Operation Mode Si37-701 Cooling Oil Return Operation Refrigerant Circuit...
  • Page 90 Si37-701 Refrigerant Flow for Each Operation Mode Heating Oil Return Operation Refrigerant Circuit...
  • Page 91 Refrigerant Flow for Each Operation Mode Si37-701 Oil Return Operation at Simultaneous Cooling / Heating Operation Refrigerant Circuit...
  • Page 92 Si37-701 Refrigerant Flow for Each Operation Mode Partial Defrosting 1 (Defrosting in the Right Unit) Refrigerant Circuit...
  • Page 93 Refrigerant Flow for Each Operation Mode Si37-701 Partial Defrosting 2 (Defrosting in the Left Unit) Refrigerant Circuit...
  • Page 94 Si37-701 Refrigerant Flow for Each Operation Mode REYQ18P, 20P Cooling Operation Refrigerant Circuit...
  • Page 95 Refrigerant Flow for Each Operation Mode Si37-701 Heating Operation Refrigerant Circuit...
  • Page 96 Si37-701 Refrigerant Flow for Each Operation Mode Simultaneous Cooling / Heating Operation Refrigerant Circuit...
  • Page 97 Refrigerant Flow for Each Operation Mode Si37-701 Cooling Oil Return Operation Refrigerant Circuit...
  • Page 98 Si37-701 Refrigerant Flow for Each Operation Mode Heating Oil Return Operation Refrigerant Circuit...
  • Page 99 Refrigerant Flow for Each Operation Mode Si37-701 Oil Return Operation at Simultaneous Cooling / Heating Operation Refrigerant Circuit...
  • Page 100 Si37-701 Refrigerant Flow for Each Operation Mode Partial Defrosting 1 (Defrosting in the Right Unit) Refrigerant Circuit...
  • Page 101 Refrigerant Flow for Each Operation Mode Si37-701 Partial Defrosting 2 (Defrosting in the Left Unit) Refrigerant Circuit...
  • Page 102 Si37-701 Refrigerant Flow for Each Operation Mode Operation of refrigerant regulator 1. Recovery of refrigerant Surplus refrigerant is recovered to refrigerant regulator by opening of SVL and SVG when the indoor unit load is small. Liquid Pipe Right Pressure regulating valve 20SA S1NPH Equalizing...
  • Page 103 Refrigerant Flow for Each Operation Mode Si37-701 Pressure equalizing when switching operation cooling/ heating 1. When switching operation from to cooling to heating First, the electric expansion valves for EVHS, EVH, EVL and EVLS of the indoor unit will be closed.
  • Page 104 Si37-701 Refrigerant Flow for Each Operation Mode 2. When switching operation from heating to cooling First, the electric expansion valve and the solenoid valve for EVHS, EVH, EVL and EVLS of the indoor unit will be closed. Next, open the EVLS, and it makes to balance the system pressure. Finally, EVL and EVLS are opened and the electric expansion valve of the indoor unit is opened to start the operation as a cooling circuit.
  • Page 105 Refrigerant Flow for Each Operation Mode Si37-701 Refrigerant Circuit...

  • Page 106: Part 4 Function

    Si37-701 Part 4 Function 1. Function General...................96 1.1 Symbol ....................96 1.2 Operation Mode..................98 2. Basic Control..................99 2.1 Normal Operation ...................99 2.2 Compressor PI Control.................100 2.3 Electronic Expansion Valve PI Control..........108 2.4 Step Control of Outdoor Unit Fans ............108 2.5 Outdoor Unit Fan Control in Cooling Operation ........109 2.6 Heat Exchanger Control ...............110 3.

  • Page 107: Function General

    Function General Si37-701 1. Function General Symbol Electric symbol Symbol Description or function REYQ8~16P REMQ8~16P (Heat exchanger1) 20SA Four way valve (Heat exchanger switch) (Heat exchanger2) 20SB Four way valve (High/low pressure gas pipe switch) – – Discharge pipe superheated degree DSHi –...
  • Page 108 Si37-701 Function General Electric symbol Symbol Description or function REYQ8~16P REMQ8~16P R1T (A1P) R1T (A1P) Outdoor air temperature R8T (Suction pipe1) Suction pipe temperature R10T (Suction pipe2) (Deicer1) Heat exchanger outlet temperature at cooling R12T (Deicer2) (Gas pipe1) Heat exchanger gas pipe temperature R11T (Gas pipe2) (Liquid pipe1)

  • Page 109: Operation Mode

    Function General Si37-701 Operation Mode Thermostat ON Operation in stop mode Indoor unit stop or thermostat Operation Pressure egualization mode prior to startup changeover Restart stanby Thermostat ON Malfunction/ Rotation Stanby Malfunction/ Stanby Indoor unit stop or thermostat OFF Pump-down Cooling Heating Thermostat ON...

  • Page 110: Basic Control

    Si37-701 Basic Control Basic Control Normal Operation 2.1.1 List of Functions in Normal Operation (Electric Function of Functional Part Symbol) Part Name Symbol Normal Simultaneous Normal Cooling Normal Heating REYQ REMQ Cooling / Heating M1C M1C PI control, High PI control, High PI control, High Compressor 1 pressure protection,...

  • Page 111: Compressor Pi Control

    Basic Control Si37-701 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 112 Si37-701 Basic Control 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. STD2: Standard compressor 2 Pattern 1 Pattern 2...
  • Page 113 Basic Control Si37-701 REYQ38P, 40P No. 2 No. 5 No. 3 No. 6 No. 7 No. 1 No. 4 No. 1 No. 4 No. 2 No. 5 No. 7 No. 3 No. 6 No. 3 No. 6 No. 1 No. 4 No. 7 No.
  • Page 114 Si37-701 Basic Control Compressor Step Control Compressor operations vary with the following steps according to information in "2.2 Compressor PI Control". Furthermore, the operating priority of compressors is subject to information in " Operating Priority and Rotation of Compressors". Single unit installation REYQ14PY1, 16PY1 REYQ8PY1, 10PY1, 12PY1 STEP...
  • Page 115 Basic Control Si37-701 Two-unit multi system REYQ18PY1, 20PY1 (8+10/12HP) REYQ22PY1, 24PY1 (10/12+12HP) (To increase Step No.) (To decrease Step No.) (To increase Step No.) (To decrease Step No.) STEP unit 1 unit 2 STEP unit 1 unit 2 STEP unit 1 unit 2 STEP unit 1...
  • Page 116 Si37-701 Basic Control Three-unit multi system REYQ26PY1, 28PY1 (10/12+16HP) REYQ 32PY1 (16+16HP) (To increase Step No.) (To decrease Step No.) (To increase Step No.) (To decrease Step No.) STEP unit 1 unit 2 STEP unit 1 unit 2 STEP unit 1 unit 2 STEP unit 1...
  • Page 117 Basic Control Si37-701 REYQ34PY1, 36PY1 (8+10/12+16HP) REYQ38PY1, 40PY1 (10/12+12+16HP) (To increase Step No.) (To decrease Step No.) (To increase Step No.) (To decrease Step No.) STEP unit 1 unit 2 unit 3 STEP unit 1 unit 2 unit 3 STEP unit 1 unit 2 unit 3...
  • Page 118 Si37-701 Basic Control REYQ42PY1, 44PY1 (10/12+16+16HP) REYQ46PY1, 48PY1 (14/16+16+16HP) (To increase Step No.) (To decrease Step No.) (To increase Step No.) (To decrease Step No.) STEP unit 1 unit 2 unit 3 STEP unit 1 unit 2 unit 3 STEP unit 1 unit 2 unit 3...

  • Page 119: Electronic Expansion Valve Pi Control

    Basic Control Si37-701 Electronic Expansion Valve PI Control Main electronic expansion valve EVM control When the outdoor unit heat exchanging is performed via the evaporator (20SA is set to ON), this function is used to exert PI control on the electronic expansion valve (Y1E or Y3E) so that the evaporator outlet superheated degree (SH) will become constant.

  • Page 120: Outdoor Unit Fan Control In Cooling Operation

    Si37-701 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. Fan step 9 Pc>3.28MPa PI control...

  • Page 121: Heat Exchanger Control

    Basic Control Si37-701 Heat Exchanger Control While in heating or cool/heat simultaneous operation, ensure target condensing and evaporating temperature by changing over the air heat exchange of outdoor unit to the evaporator or the condenser in response to loads. [Single system] Outdoor unit Outdoor unit Note 1.

  • Page 122: Special Control

    Si37-701 Special Control Special Control Startup Control This control is used to equalize the pressure in the front and back of the compressor prior to the startup of the compressor, thus reducing startup loads. Furthermore, the inverter is turned ON to charge the capacitor. In addition, to avoid stresses to the compressor due to oil return or else after the startup, the following control is made and the position of the four way valve is also determined.
  • Page 123 Special Control Si37-701 3.1.2 Startup Control in Heating Operation Elect. Control Startup control symbol Actuator Symbol before startup STEP1 STEP2 REYQ REMQ Compressor 1 M1C M1C 52Hz+OFF+OFF+2STEP / 20 sec. Compressor 2 — M2C M2C 0 Hz 52 Hz+OFF+OFF (Until it reaches Compressor 3 —...

  • Page 124: Large Capacity Start Up Control (Heating)

    Si37-701 Special Control Large Capacity Start Up Control (Heating) For startup, oil return operation, or setup after defrosting, start up multiple compressors at a high speed according to the conditions of indoor units with thermostat ON, thus maximizing the equipment capacity. Pressure Number of compressors...

  • Page 125: Oil Return Operation

    Special Control Si37-701 Oil Return Operation This function is used to recover refrigerant oil that flows out from the compressor to the system side by conducting oil return operation in order to prevent the compressor from running out of refrigerant oil. 3.3.1 Cooling Oil Return Operation [Start conditions] Referring to the following conditions, start cooling oil return operation.
  • Page 126 Si37-701 Special Control Cooling indoor unit actuator Oil return operation Thermo ON unit Remote controller setting Unit not in operation Thermo OFF unit Remote controller setting Thermo ON unit Normal opening degree Motorized valve Unit not in operation 192pls Thermo OFF unit Normal opening degree for forced thermostat ON Cooling BS unit actuator Elect.
  • Page 127 Special Control Si37-701 3.3.2 Heating Oil Return Operation (including cooling / heating simultaneous operation) [Start conditions] Referring to the following conditions, start heating oil return operation. • Integral oil rise rate is reached to specified level. • When cumulative compressor operating time exceeds 8 hours (2 hours when the power supply turns ON for the first time) Furthermore, the integral oil rise rate is calculated by Tc, Te, and compressor loads.
  • Page 128 Si37-701 Special Control Cooling indoor unit actuator Oil return operation Thermo ON unit Remote controller setting Unit not in operation Thermo OFF unit Remote controller setting Thermo ON unit Normal opening degree Motorized valve Unit not in operation 192pls Thermo OFF unit Normal opening degree for forced thermostat ON Heating indoor unit actuator Oil return operation...

  • Page 129: Defrost Operation

    Special Control Si37-701 Defrost Operation [Start conditions] Referring to the following conditions, start defrost operation. • When there is a decrease in the coefficient of heat transfer of outdoor unit heat exchanger • When there is a drop in the temperature of outdoor unit heat exchanger outlet (Tb) &...
  • Page 130 Si37-701 Special Control Elect. symbol Evaporating outdoor unit actuator Defrost operation Operation after defrost Symbol REYQ REMQ Upper limit 124Hz (STD Holds) Compressor 1 M1C REYQ8•10•12P: 232Hz+ON REYP400•480A: 232Hz+232Hz REYQ14•16P: 232Hz+232Hz REMP224A: 210Hz Compressor 2 — REMQ8P: 210Hz REMP280•335A: 210Hz+ON REMQ10•12P: 210Hz+ON REMP400•450A: REMQ14•16P: 210Hz+ON+ON...

  • Page 131: Pump-Down Residual Operation

    Special Control Si37-701 Pump-down Residual Operation 3.5.1 Pump-down Residual Operation in Cooling Operation If the liquid refrigerant stays in the Evaporator 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 Evaporator while the compressor stops, the pump-down residual operation is conducted.
  • Page 132 Si37-701 Special Control 3.5.2 Pump-down Residual Operation in Heating Operation and Simultaneous Cooling / Heating Operation Elect. symbol Actuator Symbol Master unit operation Slave unit operation REYQ REMQ Compressor 1 Compressor 2 — 124 Hz+OFF+OFF Compressor 3 Outdoor unit fan 1 —...

  • Page 133: Standby

    Special Control Si37-701 Standby 3.6.1 Restart Standby Used to forcedly stop the compressor for a period of 2 minutes, in order to prevent the frequent ON/OFF of the compressor and equalize the pressure within the refrigerant system. Elect. Operation symbol Actuator Symbol REYQ8~16P...

  • Page 134: Stopping Operation

    Si37-701 Special Control Stopping Operation 3.7.1 When System is in Stop Mode (Normal operation stop) This mode is used to define actuator operations when the system stops. Elect. Operation symbol Actuator Symbol REYQ8~16P REMQ8P REMQ10•12P REMQ14•16P REYQ REMQ Compressor1 — M1C M1C Compressor2 —...

  • Page 135: Protection Control

    Protection Control Si37-701 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] ★...
  • Page 136 Si37-701 Protection Control [Heating Operation and Simultaneous Cooling / Heating Operation] ★ The following control is performed in the entire system. Pc_max indicates the maximum value within the system. Normal Operation Pc_max>3.31MPa Pc_max<2.94MPa When high pressure is limited Compressor step: 7 STEP down Pc_max After 10 sec.

  • Page 137: Low Pressure Protection Control

    Protection Control Si37-701 Low Pressure Protection Control This low pressure protection control is used to protect compressors against the transient decrease of low pressure. [In cooling operation] ★ Because of common low pressure, the following control is performed in the system. Pe_min indicates the minimum value within the system.
  • Page 138 Si37-701 Protection Control [In heating operation and Simultaneous Cooling / Heating Operation] ★ The following control is performed in the system. Pe_min indicates the minimum value within the system. Normal Operation Pe_min Pe_min>0.23MPa & <0.17MPa Upper limit compressor step=max (Max. step) During the control of low pressure protection Compressor step: 2-step down...

  • Page 139: Discharge Pipe Protection Control

    Protection Control Si37-701 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. [Contents] ★ The following control is performed for each compressor of single unit as well as multi units. [INV compressor] Normal operation HTdi<100˚C...

  • Page 140: Inverter Protection Control

    Si37-701 Protection Control Inverter Protection Control Inverter current protection control and inverter fin temperature control are performed to prevent tripping due to a malfunction, or transient inverter overcurrent, and fin temperature increase. ★ In the case of multi-outdoor-unit system, each INV compressor performs these controls in the following sequence.
  • Page 141 Protection Control Si37-701 [Inverter fin temperature control] ★ Perform the following control of integrated as well as multi units for each INV compressor. Normal operation Tfin>84˚C Tfin<81˚C & INV upper limit frequency=max (210Hz) During the control of fin temperature protection INV Comp.

  • Page 142: Std Compressor Overload Protection

    Si37-701 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 143: Other Control

    Other Control Si37-701 Other Control Backup Operation If any of the compressors goes wrong, disable the relevant compressor or the relevant outdoor unit from operating, and then conduct emergency operation only with operational compressors or outdoor units. "Emergency operation with remote controller reset" and "Emergency operation with outdoor unit PC board setting"...

  • Page 144: Outline Of Control (Indoor Unit)

    Si37-701 Outline of Control (Indoor Unit) 6. Outline of Control (Indoor Unit) Operation Flow Chart Cooling Operation Start (Option) Turn ON Aux. electric : OFF power supply heater Humidifier : OFF Initialize electronic expansion valve Detect louver lock The previous settings of air LED in remote flow rate, wind direction, and controller turns ON...
  • Page 145 Outline of Control (Indoor Unit) Si37-701 Microcomputer dry operation Heating Operation (option) Microcomputer dry display Drain : OFF pump kit Thermostat status : Operating in L mode after it stops for 6 min. Operating in L mode Swing flap? Electronic 20E : expansion valve Electronic...

  • Page 146: Thermostat Control

    Si37-701 Outline of Control (Indoor Unit) Thermostat Control 6.2.1 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 147 Outline of Control (Indoor Unit) Si37-701 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 148 Si37-701 Outline of Control (Indoor Unit) 6.2.2 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 149 Outline of Control (Indoor Unit) Si37-701 6.2.4 Thermostat Control with Operation Mode Set to "AUTO" When the operation mode is set to "AUTO" on the remote controller, the system will conduct the temperature control shown below. Furthermore, setting changes of the differential value (D°C) can be made according to information in the "Field settings with remote controller (p.

  • Page 150: Drain Pump Control

    Si37-701 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). 6.3.1 When the Float Switch is Tripped while the Cooling Thermostat is ∗...
  • Page 151 Outline of Control (Indoor Unit) Si37-701 6.3.3 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. 6.3.4 When the Float Switch is Tripped and “AF”...

  • Page 152: Control Of Electronic Expansion Valve

    Si37-701 Outline of Control (Indoor Unit) Control of Electronic Expansion Valve Electronic expansion valves in indoor units have the functions of conducting superheated degree control in cooling operation and subcooled degree control in heating operation. However, if the indoor units receive any control command such as a protection control command or a special control command from the outdoor unit, the units will give a priority to the control command.

  • Page 153: Freeze Prevention

    Outline of Control (Indoor Unit) Si37-701 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 154: Heater Control (Optional Pc Board Krp1B

    Si37-701 Outline of Control (Indoor Unit) Heater Control (Optional PC Board KRP1B...is required.) 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]...

  • Page 155: List Of Swing Flap Operations

    Outline of Control (Indoor Unit) Si37-701 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 156: Hot Start Control (In Heating Operation Only)

    Si37-701 Outline of Control (Indoor Unit) Hot Start Control (In Heating Operation Only) At startup with thermostat ON or after the completion of defrosting in heating operation, the indoor unit fan is controlled to prevent cold air from blasting out and ensure startup capacity. [Detail of operation] When either the start condition 1 or the start condition 2 is established, the operations shown below will be conducted.

  • Page 157: Louver Control For Preventing Ceiling Dirt

    Outline of Control (Indoor Unit) Si37-701 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 158: Part 5 Test Operation

    Si37-701 Part 5 Test Operation Test Operation ..................148 1.1 Installation Process ................148 Procedure and Outline .................149 Operation when Power is Turned On ...........167 Outdoor Unit PC Board Layout ............168 Field Setting ..................169 Field Setting from Remote Controller ...........169 3.2 Field Setting from Outdoor Unit............182 Test Operation...

  • Page 159: Test Operation

    Test Operation Si37-701 1. Test Operation Installation Process Below Figure shows the installation process. Install in the order of the steps shown. 3. Selection of Location 4. Inspecting and Handling the Unit 5. Placing the Unit 7. Field Wiring 6. Refrigerant Piping 8.

  • Page 160: Procedure And Outline

    Si37-701 Test Operation Procedure and Outline Follow the following procedure to conduct the initial test operation after installation. 1.2.1 Check Work Prior to Turn Power Supply On Is the wiring performed as specified? Check the below items. Is the designated wire used? 2Power wiring Is the wiring screw of wiring not loose? 2Control transmission wiring...
  • Page 161 Test Operation Si37-701 Is a proper quantity of refrigerant charged? Check on amount of refrigerant The following method is available for additional charging of charge refrigerant. (1) Calculate additional refrigerant quantity. • Calculate a necessary additional refrigerant charging amount according to the procedure for calculation shown below.
  • Page 162 Si37-701 Test Operation 1.2.2 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 163 Test Operation Si37-701 1.2.3 Air Tight Test and Vacuum Drying Note: Always use nitrogen gas for the airtightness test. Absolutely do not open the shutoff valve until the main power circuit insulation measurement has been completed. (measuring after the shutoff valve is opened will cause the insulation value to drop.) <Needed tools>...
  • Page 164 Si37-701 Test Operation <Air tight test> Pressurize the liquid pipe, suction gas pipe, HP/LP gas pipe and equalizer pipe from the service ports of each shutoff valve to 4.0MPa (40bar) (do not pressurize more than 4.0MPa (40bar)). If the pressure does not drop within 24 hours, the system passes the test. If there is a pressure drop, check for leaks, make repairs and perform the airtight test again.
  • Page 165 Test Operation Si37-701 Caulking, etc. Insulation material Piping lead-out hole lid Block “ ”. Open a knock hole at “ ”. Note: After knocking out the holes, we recommend you remove burrs in the knock holes (See above figure) and paint the edges and areas around the edges using the repair paint. 1.2.5 Additional Refrigerant Charge and Check Operation The outdoor unit is charged with refrigerant when shipped from the factory, but depending on the size and length of the piping when installed, it may require additional charging.
  • Page 166 Si37-701 Test Operation [Shutoff Valve Operation Procedure] When operating the shutoff valve, follow the procedure instructed below. Note: Do not open the shutoff valve until “1.2.1 Check work prior to turn power supply on” in page 149 are completed. If the shutoff valve is left open without turning on the power, it may cause refrigerant to buildup in the compressor, leading insulation degradation.
  • Page 167 Test Operation Si37-701 Service port Seal section Hex holes Shaft (valve body) fig 34 [To open] 1. Remove the cap and turn the shaft counterclockwise with the hexagon wrench (JISB4648). 2. Turn it until the shaft stops. 3. Make sure to tighten the cap securely. (For the tightening torque, refer to the item <Tightening Torque>.) [To close] 1.
  • Page 168 Si37-701 Test Operation [How to Check How Many Units are Connected] It is possible to find out how many indoor or outdoor unit in the system are turned on by operating the push button on the PC-board (A1P) of outdoor unit (In case of multi system master unit).
  • Page 169 Test Operation Si37-701 1.2.5.2 Procedure of Adding Refrigerant Charging and Check Operation Warning Electric Shock Warning Make sure to close the EL. COMPO. BOX lid before turning on the power when performing the refrigerant charging operation. Perform the setting on the PC board (A1P) of the outdoor unit and check the LED display after the power is on via the inspection door which is in the EL.
  • Page 170 Si37-701 Test Operation 1.2.5.2.1 Procedure of Adding Refrigerant charging 1. Make sure the following works are complete in accordance with the installation manual. Piping work Wiring work Air tight test Vacuum drying Installation work for BS, indoor unit 2. Calculate the “additional charging amount” using “How to calculate the additional refrigerant to be charged”...
  • Page 171 Test Operation Si37-701 Note: The refrigerant will be charged about 30kg in one hour at outdoor temp. 30°C DB (12kg at 0°CDB). If you need to speedup in case of multi system, connect the refrigerant tanks to each outdoor unit as shown in the next figure. REYQ8~16PY1 Charge hose Outdoor...
  • Page 172 Si37-701 Test Operation [Refrigerant Charging Operation Procedure] STEP 1 Open the liquid pipe, suction gas pipe, HP/LP gas pipe and equalizer pipe shutoff valves (The valve A~C must be closed. The valve A~C means the valves in the figure of REYQ8~16PY1 on page 159.) STEP 2 •...
  • Page 173 Test Operation Si37-701 STEP 5 After completing the additional refrigerant charging, record the charging amount on the accessory “REQUEST FOR THE INDICATON” label (Installation records) and adhere it to the back side of the front panel. Also, record the factory charged refrigerant amount, additional refrigerant amount in the field and total refrigerant amount of the system to “ADDITIONAL REF.
  • Page 174 Si37-701 Test Operation [Operation procedure] To protect the compressor, make sure to turn on the power supply for 6 hours before stating operation. (After turning on the power supply, the unit can not start the operation until the H2P LED goes off.
  • Page 175 Test Operation Si37-701 [Remote controller displays malfunction code] REYQ8~16PY1 Malfunction code Installation error Remedial action E3, E4 The shutoff valve of the outdoor unit is F3, F6 Open the shutoff valve. left closed. The phases of the power to the outdoor Exchange two of the three phases (L1, unit is reversed.
  • Page 176 Si37-701 Test Operation 1.2.6 Onsite Settings NOTE: In the case of a multi system, all onsite settings should be made on the master unit. Settings made on slave units are invalid. The outdoor unit to which the indoor unit transmission wire are connected is the master unit, and all other units are slave units.
  • Page 177 Test Operation Si37-701 1.2.7 Test Run 1.2.7.1 Before Test Run • Make sure the following works are completed in accordance with the installation manual. Piping work Wiring work Air tight test Vacuum drying Additional refrigerant charge Check operation • Check that all work for the BS unit and indoor unit are finished and there are no danger to operate.

  • Page 178: Operation When Power Is Turned On

    Si37-701 Test Operation Operation when Power is Turned On 1.3.1 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 179: Outdoor Unit Pc Board Layout

    Outdoor Unit PC Board Layout Si37-701 Outdoor Unit PC Board Layout Outdoor unit PC board (2) Set mode display (LED) (3) Mode setting switch H1P H2P H3P H4P H5P H6P H7P H8P 1 2 3 4 1 2 3 4 MODE RETURN TEST...

  • Page 180: Field Setting

    Si37-701 Field Setting Field Setting Field Setting from Remote Controller Individual function of indoor unit can be changed from the remote controller. At the time of installation or after service inspection / repair, make the local setting in accordance with the following description.
  • Page 181 Field Setting Si37-701 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 182 Si37-701 Field Setting 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 ▼...
  • Page 183 Field Setting Si37-701 3.1.4 Setting Contents and Code No. – VRV Indoor unit Mode Second Code No.(Note 3) Setting Details Setting Contents Switch Note 2 Super Approx. Approx. long life 10,000 5,000 filter hrs. hrs. Filter contamination heavy/ light (Setting for display Approx.
  • Page 184 Si37-701 Field Setting 3.1.5 Applicable Range of Field Setting Ceiling mounted cassette type Slim Ceiling Ceiling Ceiling Ceiling Wall Floor Concealed Ceiling Concealed mounted mounted suspended mounted standing Floor Multi flow Double Corner mounted (Duct) built-in duct type type type type standing flow...
  • Page 185 Field Setting Si37-701 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 186 Si37-701 Field Setting (6) External ON/OFF input This input is used for "ON / OFF operation" and "Protection device input" from the outside. The input is performed from the T1-T1 terminal of the operation terminal block (X1A) in the electric component box.
  • Page 187 Field Setting Si37-701 (10) Auto Restart after Power Failure Reset For the air conditioners with no setting for the function (same as factory setting), the units will be left in the stop condition when the power supply is reset automatically after power failure reset or the main power supply is turned on again after once turned off.
  • Page 188 Si37-701 Field Setting (13) Air Flow Direction Setting Set the air flow direction of indoor units as given in the table below. (Set when optional air outlet blocking pad has been installed.) The second code No. is factory set to “01.” Setting Table Second Code Mode No.
  • Page 189 Field Setting Si37-701 (18) Setting of Direct Duct Connection This is used when "fresh air intake kit equipped with fan" is connected. The indoor fan carries out residual operation for one minute after the thermostat is stopped. (For the purpose of preventing dust on the air filter from falling off.) Mode No.
  • Page 190 Si37-701 Field Setting 3.1.7 Centralized Control Group No. Setting BRC1C Type In order to conduct the central remote control using the central remote controller and the unified ON/OFF controller, Group No. settings should be made by group using the operating remote controller.
  • Page 191 Field Setting Si37-701 Group No. Setting Example Centoral Remote Controller Indoor/Outdoor Outdoor/Outdoor Indoor/Outdoor Outdoor/Outdoor F1 F2 F1 F2 F1 F2 F1 F2 F1 F2 F1 F2 P1 P2 F1 F2 P1 P2 F1 F2 P1 P2 F1 F2 P1 P2 Group Control by Remote Contoller Main 1-00...
  • Page 192 Si37-701 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 193: Field Setting From Outdoor Unit

    Field Setting Si37-701 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 194 Si37-701 Field Setting Overview of setting procedure Reference Setting item Content and objective of setting page Indoor unit 191~194 Used to operate the indoor unit in the fan forced H Set No. 5 of "Setting mode 2" to indoor stopped state in forced H operation operation unit forced fan H.
  • Page 195 Field Setting Si37-701 3.2.2 Setting by Dip Switches (1) Factory setting of initial PC board. Do not make any changes in all factory settings of the DIP switches on the control PC board. Status of DIP switches : Represents the factory setting positions of the switches.
  • Page 196 Si37-701 Field Setting “Detail of DS1-1~4, DS2-1~4 setting” Single Unit A1P (Main) Factory Set ( represents the position of switches) DS1 DS2 EB**** Allocation Application model Setting method ( represents the position of switches) HEAT RECOVERY(8HP) REYQ8PY1 Set DS2-1 and DS2-3 to ON. 1 2 3 1 2 3 4 HEAT RECOVERY(10HP)
  • Page 197 Field Setting Si37-701 Single Unit A3P (Sub) Factory Set ( represents the position of switches) DS1 DS2 EB**** Allocation Application model Setting method ( represents the position of switches) HEAT RECOVERY(8HP) REYQ8PY1 Set DS1-4 and DS2-2 to ON. 1 2 3 1 2 3 4 HEAT RECOVERY(10HP) REYQ10PY1...
  • Page 198 Si37-701 Field Setting Multi Unit Allocation Application model Setting method ( represents the position of switches) HEAT RECOVERY(8HP) REMQ8PY1 Set DS2-1, DS2-2 and DS2-3 to ON. 1 2 3 1 2 3 4 HEAT RECOVERY(10HP) REMQ10PY1 Set DS2-1 and DS2-4 to ON. 1 2 3 1 2 3 4 HEAT RECOVERY(12HP)
  • Page 199 Field Setting Si37-701 3.2.3 Setting by Push Button Switches The following settings are made by push button 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 200 Si37-701 Field Setting Mode changing procedure 2 (Set): Select mode with BS2 (SET button) in each selection step. Setting mode 1 Press BS1 (MODE button) for more than 5 sec. Press BS1(MODE button). (Initial condition) Monitor mode Setting mode 2 Setting item selection Check item selection (SET button)
  • Page 201 Field Setting Si37-701 a. “Setting mode 1” This mode is used to set and check the following items. Check items ··········· The following items can be checked. (1) Current operating conditions (Normal / Abnormal / In check operation) (2) Low noise operating conditions (In normal operation / In low noise operation) (3) Demand operating conditions (In normal operation / In demand operation) Procedure for checking check items The system is normally set to "Setting...
  • Page 202 Si37-701 Field Setting Setting item Description b. “Setting mode 2” Used to make setting of contents to display on the digital Digital pressure pressure gauges (e.g. pressure sensors and temperature gauge kit display sensors) Push and hold the MODE (BS1) button for 5 seconds and set to Cool/heat unified Sets address for cool/heat unified operation.
  • Page 203 Field Setting Si37-701 Setting item Description Emergency operation (Setting for the unit 1 operation prohibition in multi- outdoor-unit system) Emergency operation Used to temporarily prohibit the applicable outdoor unit (Setting for the unit from operating should there be any faulty part in multi- 2 operation outdoor-unit system.
  • Page 204 Si37-701 Field Setting Setting item display C/H selection Setting condition display MODE TEST Demand Setting item noise Master Slave ∗ Factory set 8777777 ∗ Address 8777778 Binary number Digital pressure gauge kit display (4 digits) 8778888 8777777 ∗ Address 8777778 Binary number Cool / Heat Unified address...
  • Page 205 Field Setting Si37-701 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 6 step or lower) 8777778 8777787 ∗...
  • Page 206 Si37-701 Field Setting c. Monitor mode LED display Setting item Data display To enter the monitor mode, push the 9 7 7 7 7 7 7 Various settings Lower 4 digits 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 207 Field Setting Si37-701 Setting item 0 Display contents of “Number of units for various settings” EMG operation / 9 7 7 8 7 7 7 backup operation 9 7 7 7 7 7 7 setting Defrost select setting Short 9 7 7 7 8 7 7 Medium 9 7 7 7 9 7 7 Long...
  • Page 208 Si37-701 Field Setting 3.2.4 Cool / Heat Mode Switching Set Cool/Heat Separately for Each BS Unit by Cool/Heat Selector. Set remote controller change over switch (SS1, SS2) as following: • When using COOL/HEAT selector, turn this switch to the BS side. NOTE: This setting must be completed before turning power supply ON.
  • Page 209 Field Setting Si37-701 3.2.5 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 adaptor (optional), you can lower operating noise. Setting Content Level 1...
  • Page 210 Si37-701 Field Setting Image of operation in the case of A Operation sound Rated operation sound Operation sound of Approx. 55 db (target) level 1 Operation sound of Approx. 50 db (target) level 2 Operation sound of level 3 Approx. 45 db (target) Note1: Above values are reference only (measured in silent room) Note2: Above values are for 1 module only.
  • Page 211 Field Setting Si37-701 Setting of Demand Operation By connecting the external contact input to the demand input of the outdoor unit external control adaptor (optional), the power consumption of unit operation can be saved suppressing the compressor operating condition. Description of setting Setting procedure Setting External control...
  • Page 212 Si37-701 Field Setting 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 213 Field Setting Si37-701 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 2 is entered and H1P lights. During the setting mode 1 is displayed, “In low noise operation” and “In demand control” are displayed.
  • Page 214 Si37-701 Field Setting 3.2.6 Setting of Refrigerant Recovery Mode When carrying out the refrigerant collection on site, fully open the respective expansion valve of indoor and outdoor units. All indoor and outdoor unit’s operation are prohibited. [Operation procedure] In setting mode 2 with units in stop mode, set “Refrigerant Recovery / Vacuuming mode” to ON.

  • Page 215: Emergency Operation

    Field Setting Si37-701 3.2.9 Emergency Operation If any of the compressors goes wrong, disable the relevant compressor or the relevant outdoor unit from operating, and then conduct emergency operation only with operational compressors or outdoor units. There are two ways of conducting the Emergency operation : with remote controller reset and by setting outdoor unit PC board.
  • Page 216 Si37-701 Field Setting Disabling the compressor 2 (on the left side) from operating: Set No. 39 of setting mode 2 to "Disable-compressor-2 operation". LED display ( : ON, : OFF, : Blink) (Step) H1P-----------H7P (1) Press the PAGE button (BS1) for 5 8111111 seconds or more.
  • Page 217 Field Setting Si37-701 [Cancel of Emergency Operation] To cancel the emergency operation, conduct the following setting. (Return to Factory setting.) <REYQ8 to 16PY1> Cancel disabling the compressor 1 (on the right side) from operating: Set No. 38 "Disable-compressor-1 operation" of setting mode 2 to "OFF". LED display ( : ON, : OFF,...
  • Page 218 Si37-701 Field Setting Cancel disabling the outdoor unit 2 from operating: Set No. 39 "Disable-outdoor-unit-2 operation" of setting mode 2 to "OFF". LED display ( : ON, : OFF, : Blink) (Step) H1P-----------H7P (1) Press the PAGE button (BS1) for 5 8111111 seconds or more.
  • Page 219 Field Setting Si37-701 3.2.10 Prevention of Small Heating in Non-operating Unit In heating operation, this setting is made to prevent room temperature from rising due to small heating capacity generated in the unit with its heating thermostat OFF or in the unit with its heating operation stopped.

  • Page 220: Part 6 Troubleshooting

    Si37-701 Part 6 Troubleshooting 1. Symptom-based Troubleshooting ............212 2. Troubleshooting by Remote Controller ..........215 2.1 The INSPECTION / TEST Button............215 2.2 Self-diagnosis by Wired Remote Controller .........216 2.3 Self-diagnosis by Wireless Remote Controller ........217 2.4 Inspection Mode ...................220 2.5 Remote Controller Service Mode ............221 2.6 Test Run Mode..................223 2.7 Remote Controller Self-Diagnosis Function .........223 3.
  • Page 221 Si37-701 3.26 “ J3 ” Outdoor Unit: Malfunction of Discharge Pipe Thermistor (R31, 32T, 33T) ..................272 3.27 “ J4 ” Outdoor Unit: Malfunction of Temperature Sensor for Heat Exchanger Gas (R2T or R11T)............273 3.28 “ J5 ” Outdoor Unit: Malfunction of Thermistor (R8T or R10T) for Suction Pipe ..................274 3.29 “...
  • Page 222 Si37-701 4. Troubleshooting (OP: Central Remote Controller) ......336 4.1 “ M1 ” PC Board Defect ................336 4.2 “ M8 ” Malfunction of Transmission between Optional Controllers for Centralized Control................337 4.3 “ MA ” Improper Combination of Optional Controllers for Centralized Control................338 4.4 “...

  • Page 223: Symptom-Based Troubleshooting

    Symptom-based Troubleshooting Si37-701 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 224 Si37-701 Symptom-based Troubleshooting Symptom Supposed Cause Countermeasure The system This symptom occurs The system is in preparation Wait for a period of approximately conducts fan immediately after turning ON mode of operation. 10 minutes. operation but not the power supply. cooling or heating operation.
  • Page 225 Symptom-based Troubleshooting Si37-701 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 226: Troubleshooting By Remote Controller

    Si37-701 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 227: Self-Diagnosis By Wired Remote Controller

    Troubleshooting by Remote Controller Si37-701 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 228: Self-Diagnosis By Wireless Remote Controller

    Si37-701 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 229 Troubleshooting by Remote Controller Si37-701 The lower digit of the code changes as shown below when the UP and DOWN buttons are pressed. Troubleshooting...
  • Page 230 Si37-701 Troubleshooting by Remote Controller Troubleshooting...

  • Page 231: Inspection Mode

    Troubleshooting by Remote Controller Si37-701 Inspection Mode Operating the INSPECTION/TEST button on the remote controller will make it possible to check the malfunction codes, indoor unit model codes, and outdoor unit model codes while in inspection mode. Unit Malfunction code Inspection Normal display (No display) Malfunction code blinks when a malfunction occurs.

  • Page 232: Remote Controller Service Mode

    Si37-701 Troubleshooting by Remote Controller Remote Controller Service Mode Operating the CHECK/TEST button on the remote controller will make it possible to obtain "service data" and change "service setting" while in service mode. How to Enter the Service Mode Service Mode 1.
  • Page 233 Troubleshooting by Remote Controller Si37-701 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 button. Malfunction code 2-U4 Malfunction code Hystory No: 1 - 9 1: Latest (VE007) Display of sensor...

  • Page 234: Test Run Mode

    Si37-701 Troubleshooting by Remote Controller Test Run Mode Operating the INSPECTION/TEST button on the remote controller will make it possible to put the system into test run mode. (1) Test run mode setting The test run mode setting can be made by conducting the following operation. Normal Test run operation...
  • Page 235 Troubleshooting by Remote Controller Si37-701 8: ON 7: OFF 9: Blink Malfunction Operation Inspection Unit No. Malfunction contents Page code lamp display Referred Indoor Unit Error of external protection device PC board defect, E PROM defect Malfunction of drain level control system (S1L) Fan motor (M1F) lock, overload Malfunction of swing flap motor (M1S) Malfunction of moving part of electronic expansion...
  • Page 236 Si37-701 Troubleshooting by Remote Controller 8: ON 7: OFF 9: Blink Malfunction Operation Inspection Unit No. Malfunction contents Page code lamp display Referred Outdoor Unit Malfunction of power unit — Malfunction of transmission between inverter and control PC board Inverter over-ripple protection Malfunction of inverter radiating fin temperature rise sensor Faulty field setting after replacing main PC board or...
  • Page 237 Troubleshooting by Remote Controller Si37-701 Malfunction code indication by outdoor unit Malfunctions Malfunction PC board code Description of malfunction Description of malfunction (PGF) Remote <Monitor mode> controller PC board malfunction PC board malfunction To enter the monitor mode, push the Faulty PC board MODE (BS1) button when in Abnormal discharge pressure...
  • Page 238 Si37-701 Troubleshooting by Remote Controller 8: ON 7: OFF 9:Blink Confirmation of malfunction 1 (Check 1) Confirmation of malfunction 2 (Check 2) Confirmation of malfunction 3 (Check 3) Confirmation of malfunction 4 (Check 4) Malfunction code H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P 7 7 9 9 9 7 7 7 9 9 7 7 7 7 9...
  • Page 239 Troubleshooting by Remote Controller Si37-701 <Monitor mode> Malfunctions Malfunction code To enter the monitor mode, push the MODE (BS1) button when in Description of malfunction Description of malfunction (PGF) Remote controller “Setting mode 1”. Open phase and unbalanced power Unbalanced INV power supply voltage supply INV radiation fin temperature sensor INV fin thermistor malfunction...
  • Page 240 Si37-701 Troubleshooting by Remote Controller 8: ON 7: OFF 9:Blink Confirmation of malfunction 1 (Check 1) Confirmation of malfunction 2 (Check 2) Confirmation of malfunction 3 (Check 3) Confirmation of malfunction 4 (Check 4) Malfunction code H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P 9 9 7 9 7 7 7 9 7 7 7 9 9 7 7 7 7 9...

  • Page 241: Troubleshooting By Indication On The Remote Controller

    Troubleshooting by Indication on the Remote Controller Si37-701 3. Troubleshooting by Indication on the Remote Controller “ ” 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 242: A1 " Indoor Unit: Pc Board Defect

    Si37-701 Troubleshooting by Indication on the Remote Controller “ ” 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 243: A3 " Indoor Unit: Malfunction Of Drain Level Control System (S1L)

    Troubleshooting by Indication on the Remote Controller Si37-701 “ ” Indoor Unit: Malfunction of Drain Level Control System (S1L) Remote Controller Display Applicable FXCQ, FXFQ, FXSQ, FXKQ, FXDQ, FXMQ, FXHQ (Option), FXMQ200,250M (Option), FXAQ (Option), FXMQ-MF (Option) Models Method of By float switch OFF detection Malfunction Detection...
  • Page 244 Si37-701 Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Is power supply Provide 220~240V power 220~240V provided? supply. The float A short switch is connected to circuit connector is Connect either a short circuit...

  • Page 245: A6 " Indoor Unit: Fan Motor (M1F) Lock, Overload

    Troubleshooting by Indication on the Remote Controller Si37-701 “ ” Indoor Unit: Fan Motor (M1F) Lock, Overload Remote Controller Display Applicable FXAQ20~63MAVE, FXFQ25~125MVE Models Method of Abnormal fan revolutions are detected by a signal output from the fan motor. Malfunction Detection Malfunction When the fan revolutions do not increase...
  • Page 246 Si37-701 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. Turn OFF the power supply, and then wait for a period of 10 minutes. Are there any foreign matters Remove the foreign matters.

  • Page 247: A6 " Indoor Unit: Malfunction Of Indoor Unit Fan Motor

    Troubleshooting by Indication on the Remote Controller Si37-701 “ ” Indoor Unit: Malfunction of Indoor Unit Fan Motor Remote Controller Display Applicable FXHQ32~100MAVE, FXDQ20~63NVET, FXDQ20~63NAVE Models Method of This malfunction is detected if there is no revolutions detection signal output from the fan motor. Malfunction Detection Malfunction...

  • Page 248: A6 " Indoor Unit: Overload / Overcurrent / Lock Of Indoor Unit Fan Motor

    Si37-701 Troubleshooting by Indication on the Remote Controller “ ” Indoor Unit: Overload / Overcurrent / Lock of Indoor Unit Fan Motor Remote Controller Display Applicable FXMQ40~125MAVE Models Method of This malfunction is detected by detecting that the individual power supply for the fan turns OFF. Malfunction Detection Malfunction...

  • Page 249: A7 " Indoor Unit: Malfunction Of Swing Flap Motor (M1S)

    Troubleshooting by Indication on the Remote Controller Si37-701 “ ” Indoor Unit: Malfunction of Swing Flap Motor (M1S) 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 motor is energized for a specified amount of time (about 30 seconds).
  • Page 250 Si37-701 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 251: A9 " Indoor Unit: Electronic Expansion Valve Malfunction

    Troubleshooting by Indication on the Remote Controller Si37-701 “ ” Indoor Unit: Electronic Expansion Valve Malfunction / Dust Clogging Remote Controller Display Applicable FXFQ25~125M Models Method of Check coil condition of electronic expansion valve by using microcomputer. Check dust clogging condition of electronic expansion valve main body by using Malfunction microcomputer.
  • Page 252 Si37-701 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. When power is supplied. Replace electronic expansion valve main body. Electronic expansion valve is Shut the power supply off after connected to X7A of connection and then restart.

  • Page 253: A9 " Indoor Unit: Malfunction Of Electronic Expansion Valve Coil

    Troubleshooting by Indication on the Remote Controller Si37-701 “ ” Indoor Unit: Malfunction of Electronic Expansion Valve Coil Remote Controller Display Applicable Indoor units except FXFQ models Models Method of Check coil condition of electronic expansion valve by using microcomputer. Malfunction Detection Malfunction...
  • Page 254 Si37-701 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. Electronic expansion valve Shut the power supply off after is connected to X7A of connection and then restart.

  • Page 255: Af " Indoor Unit: Drain Level Above Limit

    Troubleshooting by Indication on the Remote Controller Si37-701 “ ” Indoor Unit: Drain Level above Limit Remote Controller Display Applicable FXCQ, FXFQ, FXSQ, FXKQ, FXMQ, FXDQ, FXMQ-MF Models Method of Water leakage is detected based on float switch ON/OFF operation while the compressor is in non-operation.

  • Page 256: Aj " Indoor Unit: Malfunction Of Capacity Determination Device

    Si37-701 Troubleshooting by Indication on the Remote Controller “ ” 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 257: C4 " Indoor Unit: Malfunction Of Thermistor (R2T) For

    Troubleshooting by Indication on the Remote Controller Si37-701 “ ” 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 258: C5 " Indoor Unit: Malfunction Of Thermistor (R3T) For Gas Pipes

    Si37-701 Troubleshooting by Indication on the Remote Controller 3.10 “ ” 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 259: C9 " Indoor Unit: Malfunction Of Thermistor (R1T) For Suction Air

    Troubleshooting by Indication on the Remote Controller Si37-701 3.11 “ ” 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 260: Cj " Indoor Unit: Malfunction Of Thermostat Sensor In

    Si37-701 Troubleshooting by Indication on the Remote Controller 3.12 “ ” 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 261: E1 " Outdoor Unit: Pc Board Defect

    Troubleshooting by Indication on the Remote Controller Si37-701 3.13 “ ” Outdoor Unit: PC Board Defect Remote Controller Display Applicable REYQ8P~48P Models Method of Abnormality is detected under the communication conditions in the hardware section between the indoor unit and outdoor unit. Malfunction Detection Malfunction...

  • Page 262: E3 " Outdoor Unit: Actuation Of High Pressure Switch

    Si37-701 Troubleshooting by Indication on the Remote Controller 3.14 “ ” Outdoor Unit: Actuation of High Pressure Switch Remote Controller Display Applicable REYQ8P~48P Models Method of Abnormality is detected when the contact of the high pressure protection switch opens. Malfunction Detection Malfunction Error is generated when the HPS activation count reaches the number specific to the operation...
  • Page 263 Troubleshooting by Indication on the Remote Controller Si37-701 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check for the points shown below. Is the stop valve open? Is the HPS connector properly connected to the main PC board? Does the high pressure switch have continuity? Are the...

  • Page 264: E4 " Outdoor Unit: Actuation Of Low Pressure Sensor

    Si37-701 Troubleshooting by Indication on the Remote Controller 3.15 “ ” Outdoor Unit: Actuation of Low Pressure Sensor Remote Controller Display Applicable REYQ8P~48P Models Method of Abnormality is detected by the pressure value with the low pressure sensor. Malfunction Detection Malfunction Error is generated when the low pressure is dropped under compressor operation.
  • Page 265 Troubleshooting by Indication on the Remote Controller Si37-701 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Is the stop Open the stop valve. valve open? Mount a pressure gauge on the low-pressure service port.

  • Page 266: Outdoor Unit: Inverter Compressor Motor Lock

    Si37-701 Troubleshooting by Indication on the Remote Controller 3.16 “ ” Outdoor Unit: Inverter Compressor Motor Lock Remote Controller Display Applicable REYQ8P~48P Models Method of Inverter PC board takes the position signal from UVW line connected between the inverter and compressor, and the malfunction is detected when any abnormality is observed in the phase- Malfunction current waveform.
  • Page 267 Troubleshooting by Indication on the Remote Controller Si37-701 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check if Local factor the stop valve is open. Open the stop valve. Check if the relay wires to the Replace the connecting wires and...

  • Page 268: Outdoor Unit: Std Compressor Motor Overcurrent/Lock

    Si37-701 Troubleshooting by Indication on the Remote Controller 3.17 “ ” Outdoor Unit: STD Compressor Motor Overcurrent/ Lock Remote Controller Display Applicable REYQ8P~48P 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 269: E7 " Outdoor Unit: Malfunction Of Outdoor Unit Fan Motor

    Troubleshooting by Indication on the Remote Controller Si37-701 “ ” 3.18 Outdoor Unit: Malfunction of Outdoor Unit Fan Motor Remote Controller Display Applicable REYQ8P~48P Models Method of Detect a malfunction based on the current value in the INVERTER PC board (as for motor 2, current value in the fan PC board).
  • Page 270 Si37-701 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. Check in the monitor mode 12HP ~18HP class models have 2 fans. Check electric motor (electric motor 1 or 2) corresponding to malfunction code “E7”...
  • Page 271 Troubleshooting by Indication on the Remote Controller Si37-701 Troubleshooting No continuity of fuse (FIU) on the fan Replace fan inverter PC inverter PC board. board. Unable to rotate the fan manually Replace the corresponding with ease when removing the connector of the fan motor.

  • Page 272: Electronic Expansion Valve (Y1E~Y5E)

    Si37-701 Troubleshooting by Indication on the Remote Controller 3.19 “ ” Outdoor Unit: Malfunction of Moving Part of Electronic Expansion Valve (Y1E~Y5E) Remote Controller Display Applicable REYQ8P~48P Models Method of Check disconnection of connector To be detected based on continuity existence of coil of electronic expansion valve Malfunction Detection Malfunction...
  • Page 273 Troubleshooting by Indication on the Remote Controller Si37-701 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Turn power supply off, and turn power supply on again. Return to normal? External factor other than malfunction (for example, noise etc.).

  • Page 274: F3 " Outdoor Unit: Abnormal Discharge Pipe Temperature

    Si37-701 Troubleshooting by Indication on the Remote Controller 3.20 “ ” Outdoor Unit: Abnormal Discharge Pipe Temperature Remote Controller Display Applicable REYQ8P~48P Models Method of Abnormality is detected according to the temperature detected by the discharge pipe temperature sensor. Malfunction Detection Malfunction When the discharge pipe temperature rises to an abnormally high level (135 °C and above)
  • Page 275 Troubleshooting by Indication on the Remote Controller Si37-701 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Connect the service checker. Press reset and start operation again. Check if discharge pipe Replace discharge pipe thermister.

  • Page 276: Outdoor Unit: Refrigerant Overcharged

    Si37-701 Troubleshooting by Indication on the Remote Controller 3.21 “ ” Outdoor Unit: Refrigerant Overcharged Remote Controller Display Applicable REYQ8P~48P Models Method of Excessive charging of refrigerant is detected by using the outside air temperature, heat exchanging deicer temperature and liquid pipe temperature during a check run. Malfunction Detection Malfunction...

  • Page 277: F9 " Outdoor Unit: Malfunction Of Bs Unit Electronic Expansion Valve

    Troubleshooting by Indication on the Remote Controller Si37-701 3.22 “ ” Outdoor Unit: Malfunction of BS Unit Electronic Expansion Valve Remote Controller Display Applicable BS unit Models Method of This malfunction is detected by whether or not all coils of the electronic expansion valve have continuity.
  • Page 278 Si37-701 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. Turn OFF the power supply once and then ON again. Does the power supply normally Probe any external causes come back ON?

  • Page 279: Outdoor Unit: Abnormal Outdoor Fan Motor Signal

    Troubleshooting by Indication on the Remote Controller Si37-701 3.23 “ ” Outdoor Unit: Abnormal Outdoor Fan Motor Signal Remote Controller Display Applicable REYQ8P~48P Models Method of Detection of abnormal signal from fan motor. Malfunction Detection Malfunction In case of detection of abnormal signal at starting fan motor. Decision Conditions Supposed...
  • Page 280 Si37-701 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. Check the fan motor corresponding to the malfunction code “ ” in the monitor mode. (Refer to P226~227 for how to check) When check 3 shows as follows: →...

  • Page 281: Outdoor Air

    Troubleshooting by Indication on the Remote Controller Si37-701 3.24 “ ” Outdoor Unit: Malfunction of Thermistor (R1T) for Outdoor Air Remote Controller Display Applicable REYQ8P~48P Models Method of Malfunction is detected from the temperature detected by the outdoor air thermistor. Malfunction Detection Malfunction...

  • Page 282: Outdoor Unit: Current Sensor Malfunction

    Si37-701 Troubleshooting by Indication on the Remote Controller “ ” 3.25 Outdoor Unit: Current Sensor Malfunction Remote Controller Display Applicable REYQ8P~48P Models Method of Malfunction is detected according to the current value detected by current sensor. Malfunction Detection Malfunction When the current value detected by current sensor becomes 5A or lower, or 40A or more during standard compressor operation.

  • Page 283: J3 " Outdoor Unit: Malfunction Of Discharge Pipe Thermistor (R31, 32T, 33T)

    Troubleshooting by Indication on the Remote Controller Si37-701 3.26 “ ” Outdoor Unit: Malfunction of Discharge Pipe Thermistor (R31, 32T, 33T) Remote Controller Display Applicable REYQ8P~48P Models Method of Malfunction is detected from the temperature detected by discharge pipe temperature thermistor.

  • Page 284: Heat Exchanger Gas (R2T Or R11T)

    Si37-701 Troubleshooting by Indication on the Remote Controller 3.27 “ ” Outdoor Unit: Malfunction of Temperature Sensor for Heat Exchanger Gas (R2T or R11T) Remote Controller Display Applicable REYQ8P~48P Models Method of Detect malfunction based on the temperature detected by each thermistor. Malfunction Detection Malfunction...

  • Page 285: Suction Pipe

    Troubleshooting by Indication on the Remote Controller Si37-701 3.28 “ ” Outdoor Unit: Malfunction of Thermistor (R8T or R10T) for Suction Pipe Remote Controller Display Applicable REYQ8P~48P Models Method of Malfunction is detected from the temperature detected by the suction pipe temperature thermistor.

  • Page 286: Outdoor Unit Heat Exchanger

    Si37-701 Troubleshooting by Indication on the Remote Controller 3.29 “ ” Outdoor Unit: Malfunction of Thermistor (R4T or R12T) for Outdoor Unit Heat Exchanger Remote Controller Display Applicable REYQ8P~48P Models Method of Malfunction is detected from the temperature detected by the heat exchanger thermistor. Malfunction Detection Malfunction...

  • Page 287: (R6T), (R9T) Or (R14T)

    Troubleshooting by Indication on the Remote Controller Si37-701 3.30 “ ” Outdoor Unit: Malfunction of Liquid Pipe Thermistor 1 (R6T), (R9T) or (R14T) Remote Controller Display Applicable REYQ8P~48P Models Method of Malfunction is detected according to the temperature detected by liquid pipe thermistor. Malfunction Detection Malfunction...

  • Page 288: (R7T Or R15T)

    Si37-701 Troubleshooting by Indication on the Remote Controller 3.31 “ ” Outdoor Unit: Malfunction of Liquid Pipe Thermistor 2 (R7T or R15T) Remote Controller Display Applicable REYQ8P~48P Models Method of Malfunction is detected according to the temperature detected by liquid pipe thermistor. Malfunction Detection Malfunction...

  • Page 289: Exchanger Gas Pipe Thermistor (R5T Or R13T)

    Troubleshooting by Indication on the Remote Controller Si37-701 3.32 “ ” Outdoor Unit: Malfunction of Subcooling Heat Exchanger Gas Pipe Thermistor (R5T or R13T) Remote Controller Display Applicable REYQ8P~48P Models Method of Malfunction is detected according to the temperature detected by subcooling heat exchanger gas pipe thermistor.

  • Page 290: Ja " Outdoor Unit: Malfunction Of High Pressure Sensor

    Si37-701 Troubleshooting by Indication on the Remote Controller 3.33 “ ” Outdoor Unit: Malfunction of High Pressure Sensor Remote Controller Display Applicable REYQ8P~48P Models Method of Malfunction is detected from the pressure detected by the high pressure sensor. Malfunction Detection Malfunction When the high pressure sensor is short circuit or open circuit.
  • Page 291 Troubleshooting by Indication on the Remote Controller Si37-701 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Confirm which high pressure sensor is abnormal using outdoor unit "monitor mode". (Refer to page 226~227) 1.Set the high pressure gauge upright.

  • Page 292: Jc " Outdoor Unit: Malfunction Of Low Pressure Sensor

    Si37-701 Troubleshooting by Indication on the Remote Controller 3.34 “ ” Outdoor Unit: Malfunction of Low Pressure Sensor Remote Controller Display Applicable REYQ8P~48P Models Method of Malfunction is detected from pressure detected by low pressure sensor. Malfunction Detection Malfunction When the low pressure sensor is short circuit or open circuit. (Not less than 1.77MPa, or -0.01MPa and below) Decision Conditions...
  • Page 293 Troubleshooting by Indication on the Remote Controller Si37-701 ∗ 1: Voltage measurement point ∗ 2: Refer to “Pressure Sensor, Pressure / Voltage Characteristics” table on P419. Troubleshooting...

  • Page 294: L1 " Outdoor Unit: Defective Inverter Pc Board

    Si37-701 Troubleshooting by Indication on the Remote Controller 3.35 “ ” Outdoor Unit: Defective Inverter PC Board Remote Controller Display Applicable REYQ8P~48P Models Method of Malfunction is detected based on the current value during waveform output before starting compressor. Malfunction Malfunction is detected based on the value from current sensor during synchronous operation Detection when starting the unit.
  • Page 295 Troubleshooting by Indication on the Remote Controller Si37-701 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Turn OFF the power supply once, and then check the compressor lead wires. Do the lead wires have any Replace the lead wires.

  • Page 296: Temperature Rise

    Si37-701 Troubleshooting by Indication on the Remote Controller 3.36 “ ” Outdoor Unit: Malfunction of Inverter Radiating Fin Temperature Rise Remote Controller Display Applicable REYQ8P~48P Models Method of Fin temperature is detected by the thermistor of the radiation fin. Malfunction Detection Malfunction When the temperature of the inverter radiation fin increases above 87°C.
  • Page 297 Troubleshooting by Indication on the Remote Controller Si37-701 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Is the single system applied to the outdoor unit? Single system Multi system While in monitor mode, check While in monitor mode, whether the system is right-...
  • Page 298 Si37-701 Troubleshooting by Indication on the Remote Controller Inverter PC board for compressor ∗ Refer to “Thermistor Resistance / Temperature Characteristics” table on P417. Troubleshooting...

  • Page 299: L5 " Outdoor Unit: Momentary Overcurrent Of Inverter Compressor

    Troubleshooting by Indication on the Remote Controller Si37-701 3.37 “ ” Outdoor Unit: Momentary Overcurrent of Inverter Compressor Remote Controller Display Applicable REYQ8P~48P Models Method of Malfunction is detected from current flowing in the power transistor. Malfunction Detection Malfunction When an excessive current flows in the power transistor. (Instantaneous overcurrent also causes activation.) Decision Conditions...
  • Page 300 Si37-701 Troubleshooting by Indication on the Remote Controller Troubleshooting Compressor inspection Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check if the stop valve is Open the stop valve. open.

  • Page 301: L8 " Outdoor Unit: Momentary Overcurrent Of Inverter Compressor

    Troubleshooting by Indication on the Remote Controller Si37-701 3.38 “ ” Outdoor Unit: Momentary Overcurrent of Inverter Compressor Remote Controller Display Applicable REYQ8P~48P Models Method of Malfunction is detected by current flowing in the power transistor. Malfunction Detection Malfunction When overload in the compressor is detected. (Inverter secondary current 16.1A) (1) 19.0A and over continues for 5 seconds.
  • Page 302 Si37-701 Troubleshooting by Indication on the Remote Controller Troubleshooting Output current check Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check if the Open the stop valve. stop valve is open. Check if the compressor lead wires are Replace compressor...

  • Page 303: L9 " Outdoor Unit: Inverter Compressor Starting Failure

    Troubleshooting by Indication on the Remote Controller Si37-701 3.39 “ ” Outdoor Unit: Inverter Compressor Starting Failure Remote Controller Display Applicable REYQ8P~48P Models Method of Detect the failure based on the signal waveform of the compressor. Malfunction Detection Malfunction Starting the compressor does not complete. Decision Conditions Supposed...
  • Page 304 Si37-701 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 single system applied to the outdoor unit? Single system Multi system While in monitor mode, check While in monitor mode, whether the system is right-...
  • Page 305 Troubleshooting by Indication on the Remote Controller Si37-701 Troubleshooting Continued from the previous page. (Start failure due to aged operation.) Refrigerant is sleeping. ( The unit is out Cancel the sleeping state of of power supply for more refrigerant. than 6 hours.) Check if the insulation resistance of the Replace the inverter compressor.

  • Page 306: Inverter And Control Pc Board

    Si37-701 Troubleshooting by Indication on the Remote Controller 3.40 “ ” Outdoor Unit: Malfunction of Transmission between Inverter and Control PC Board Remote Controller Display Applicable REYQ8P~48P Models Method of Check the communication state between inverter PC board and control PC board by micro- computer.
  • Page 307 Troubleshooting by Indication on the Remote Controller Si37-701 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Does the Was the PC board model setting of the Make correct model setting. (A1P) replaced with a spare substitute PC board match the (For setting procedure, refer to...
  • Page 308 Si37-701 Troubleshooting by Indication on the Remote Controller Troubleshooting The fuse Replace the noise F400U of the A3P has been filter of the A3P. molten down. Disconnect the sensor connector (X2A or X4A) from the fan motor, and then turn ON the power supply. Is any malfunction code Take countermeasures...

  • Page 309: P1 " Outdoor Unit: Inverter Over-Ripple Protection

    Troubleshooting by Indication on the Remote Controller Si37-701 3.41 “ ” Outdoor Unit: Inverter Over-Ripple Protection Remote Controller Display Applicable REYQ8P~48P Models Method of Imbalance in supply voltage is detected in PC board. Imbalance in the power supply voltage causes increased ripple of voltage of the main circuit Malfunction capacitor in the inverter.
  • Page 310 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 311: P4 " Outdoor Unit: Malfunction Of Inverter Radiating Fin

    Troubleshooting by Indication on the Remote Controller Si37-701 3.42 “ ” Outdoor Unit: Malfunction of Inverter Radiating Fin Temperature Rise Sensor Remote Controller Display Applicable REYQ8P~48P Models Method of Resistance of radiation fin thermistor is detected when the compressor is not operating. Malfunction Detection Malfunction...
  • Page 312 Si37-701 Troubleshooting by Indication on the Remote Controller Inverter PC board for compressor ∗ Refer to “Thermistor Resistance / Temperature Characteristics” table on P417. Troubleshooting...

  • Page 313: Faulty Combination Of Pc Board

    Troubleshooting by Indication on the Remote Controller Si37-701 3.43 “ ” Outdoor Unit: Faulty Field Setting after Replacing Main PC Board or Faulty Combination of PC Board Remote Controller Display Applicable REYQ8P~48P Models Method of This malfunction is detected according to communications with the inverter. Malfunction Detection Malfunction...
  • Page 314 Si37-701 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. Was the PC board (A1P) replaced with a substitute PC board? Is the model setting of the Make correct setting of substitute PC board...

  • Page 315: U0 " Outdoor Unit: Gas Shortage Alert

    Troubleshooting by Indication on the Remote Controller Si37-701 3.44 “ ” Outdoor Unit: Gas Shortage Alert Remote Controller Display Applicable REYQ8P~48P Models Method of Detect gas shortage based on the temperature difference between low pressure or suction pipe and heat exchanger. Malfunction Detection Malfunction...
  • Page 316 Si37-701 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. In cooling mode Set up a pressure gauge at the service port on the low pressure side.

  • Page 317: Reverse Phase, Open Phase

    Troubleshooting by Indication on the Remote Controller Si37-701 3.45 “ ” Reverse Phase, Open Phase Remote Controller Display Applicable REYQ8P~48P Models Method of The phase of each phase are detected by reverse phase detection circuit and right phase or reverse phase are judged. Malfunction Detection Malfunction...

  • Page 318: Instantaneous Failure

    Si37-701 Troubleshooting by Indication on the Remote Controller 3.46 “ ” Outdoor Unit: Power Supply Insufficient or Instantaneous Failure Remote Controller Display Applicable REYQ8P~48P Models Method of Detection of voltage of main circuit capacitor built in the inverter and power supply voltage. Malfunction Detection Malfunction...
  • Page 319 Troubleshooting by Indication on the Remote Controller Si37-701 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check for power supply voltage. Voltage between phases: On-site causes. 380 to 415V Phase Make proper wire connections voltage: 220 without open phase, erroneous...
  • Page 320 Si37-701 Troubleshooting by Indication on the Remote Controller Troubleshooting <Single> <Multi> Check for connector connections: Remove Check for connector connections: Remove and insert the connectors shown below. and insert the connectors shown below. Furthermore, check the connectors for Furthermore, check the connectors for terminal conditions and continuity.

  • Page 321: U3 " Outdoor Unit: Check Operation Not Executed

    Troubleshooting by Indication on the Remote Controller Si37-701 “ ” Outdoor Unit: 3.47 Check Operation not Executed Remote Controller Display Applicable REYQ8P~48P 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 322: Malfunction Of Transmission Between Indoor Units

    Si37-701 Troubleshooting by Indication on the Remote Controller 3.48 “ ” Malfunction of Transmission between Indoor Units Remote Controller Display Applicable All model of indoor unit Models REYQ8P~48P Method of Check if the transmission between indoor unit and outdoor unit is correctly executed using microcomputer.
  • Page 323 Troubleshooting by Indication on the Remote Controller Si37-701 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check the detailed malfunction status in the monitor mode. (Refer to P226~227 for how to check.) In Check 4, LED lamp indicates...
  • Page 324 Si37-701 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. Continued from the previous page In Check 4, LED lamp indicates as follows: Start operation of all the indoor units.

  • Page 325: Malfunction Of Transmission Between

    Troubleshooting by Indication on the Remote Controller Si37-701 3.49 “ ” 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 326: Outdoor Unit: Transmission Failure (Across Outdoor Units)

    Si37-701 Troubleshooting by Indication on the Remote Controller 3.50 “ ” Outdoor Unit: Transmission Failure (Across Outdoor Units) Remote Controller Display Applicable All models of outdoor 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 Decision Conditions...
  • Page 327 Troubleshooting by Indication on the Remote Controller Si37-701 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check the LED lamps for “Check 3” corresponding to the malfunction code “...
  • Page 328 Si37-701 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. Diagnosis Flow 1 Check 3 Check 4 Check if any disconnection or connection error is detected in Correct the connecting wiring connecting wires with...
  • Page 329 Troubleshooting by Indication on the Remote Controller Si37-701 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Diagnosis Flow 2 Check 3 Check 4 Switch cooling/heating in Set the cooling/heating switch of a lump.
  • Page 330 Si37-701 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. Diagnosis Flow 3 Check 3 Check 4 Check the connection status of connecting wires of Multi Slave Correct the connecting wires of the 1 with outdoor multi.Check if the wiring is disconnected or is about to be...
  • Page 331 Troubleshooting by Indication on the Remote Controller Si37-701 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Diagnosis Flow 6 Check 3 Check 4 manual address settings (of the slave units 1 and 2) correct in Correct the manual address order to connect the settings.

  • Page 332: Sub Remote Controllers

    Si37-701 Troubleshooting by Indication on the Remote Controller 3.51 “ ” 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 333: Outdoor Units In The Same System

    Troubleshooting by Indication on the Remote Controller Si37-701 3.52 “ ” Indoor Unit: Malfunction of Transmission between Indoor and Outdoor Units in the Same System Remote Controller Display Applicable All models of indoor units REYQ8P~48P Models Method of Detect malfunction signal for the other indoor units within the circuit by outdoor unit PC board. Malfunction Detection Malfunction...

  • Page 334: Improper Combination Of Indoor And Outdoor Units, Indoor Units And Remote Controller

    Si37-701 Troubleshooting by Indication on the Remote Controller 3.53 “ ” Improper Combination of Indoor and Outdoor Units, Indoor Units and Remote Controller Remote Controller Display Applicable All models of indoor unit REYQ8P~48P Models Method of A difference occurs in data by the type of refrigerant between indoor and outdoor units. The number of indoor units is out of the allowable range.
  • Page 335 Troubleshooting by Indication on the Remote Controller Si37-701 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check the LED lamps for “Check 3” corresponding to the malfunction code “ ”...
  • Page 336 Si37-701 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. Diagnosis Flow 1 Check 3 Check 4 The number of indoor units connected to the same refrigerant circurt system Replace the main PC board of should not be more than...
  • Page 337 Troubleshooting by Indication on the Remote Controller Si37-701 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Diagnosis Flow 3 Check 3 Check 4 Check Check if the outdoor if the unit is not unit PC board is replaced connected to outdoor...
  • Page 338 Si37-701 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. Diagnosis Flow 5 Check 3 Check 4 Is the model BSVQ-P Connect the model BSVQ-P. connected? Replace the outdoor unit PC board as shown below.
  • Page 339 Troubleshooting by Indication on the Remote Controller Si37-701 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Diagnosis Flow 7 Check 3 Check 4 Is the wiring between Correct the connection wiring. the BS units correct? Replace the BS unit PC board concerned.

  • Page 340: Address Duplication Of Centralized Controller

    Si37-701 Troubleshooting by Indication on the Remote Controller 3.54 “ ” 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 341: Malfunction Of Transmission Between Centralized Controller And Indoor Unit

    Troubleshooting by Indication on the Remote Controller Si37-701 3.55 “ ” Malfunction of Transmission between Centralized Controller and Indoor Unit Remote Controller Display Applicable All models of indoor units Intelligent Touch Controller Centralized controller Models Schedule timer Method of Microcomputer checks if transmission between indoor unit and centralized controller is normal. Malfunction Detection Malfunction...
  • Page 342 Si37-701 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. Check the indoor unit for which “ ” is displayed. Is the the transmission Continued to A malfunction (UE) (on the following...
  • Page 343 Troubleshooting by Indication on the Remote Controller Si37-701 Troubleshooting Check the transmission wiring between central equipment for any broken Abnormal wire. For details, refer to Correct the wiring. information in the “Procedure for checking broken wires” section. (Refer P.352) Normal Check the transmission wiring with the master...

  • Page 344: System Is Not Set Yet

    Si37-701 Troubleshooting by Indication on the Remote Controller 3.56 “ ” System is not Set yet Remote Controller Display Applicable All models of indoor units Models REYQ8P~48P 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 345: Uh " Malfunction Of System, Refrigerant System Address Undefined

    Troubleshooting by Indication on the Remote Controller Si37-701 3.57 “ ” Malfunction of System, Refrigerant System Address Undefined Remote Controller Display Applicable All models of indoor units REYQ8P~48P Models Method of Detect an indoor unit with no address setting. Malfunction Detection Malfunction The malfunction decision is made as soon as the abnormality aforementioned is detected.
  • Page 346 Si37-701 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. Does electricity a malfunction being introduce for occur even after 12 the first time after minutes elapses from the Normal installation or after an indoor...

  • Page 347: Troubleshooting (Op: Central Remote Controller)

    Troubleshooting (OP: Central Remote Controller) Si37-701 Troubleshooting (OP: Central Remote Controller) “ ” PC Board Defect Remote Controller Display Applicable Central remote controller Intelligent Touch Controller 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.

  • Page 348: Malfunction Of Transmission Between Optional Controllers For Centralized Control

    Si37-701 Troubleshooting (OP: Central Remote Controller) “ ” Malfunction of Transmission between Optional Controllers for Centralized Control Remote Controller Display Applicable Central remote controller Intelligent Touch Controller Schedule timer Models Method of Detect the malfunction according to DIII-NET transmission data. (The system will be automatically reset.) Malfunction Detection...

  • Page 349: Improper Combination Of Optional Controllerslers For Centralized Controllers

    Troubleshooting (OP: Central Remote Controller) Si37-701 “ ” Improper Combination of Optional Controllers for Centralized Control Remote Controller Display Applicable Central remote controller Intelligent touch controller 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.
  • Page 350 Si37-701 Troubleshooting (OP: Central Remote Controller) Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Not available for combined Has the use with the remote control remote control adapter adapter.

  • Page 351: Mc " Address Duplication, Improper Setting

    Troubleshooting (OP: Central Remote Controller) Si37-701 “ ” Address Duplication, Improper Setting Remote Controller Display Applicable Central remote controller Intelligent Touch Controller Models Schedule timer Method of Detect the malfunction according to DIII-NET transmission data. Malfunction Detection Malfunction Two or more units of central remote controllers and Intelligent Touch Controllers are connected, and all of them are set to master unit central setting or slave unit central setting.

  • Page 352: Troubleshooting (Op: Unified On/Off Controller)

    Si37-701 Troubleshooting (OP: Unified ON/OFF Controller) Troubleshooting (OP: Unified ON/OFF Controller) Operation Lamp Blinks Remote Operation lamp blinks Controller Display Applicable All model of indoor units Unified ON/OFF controller Models Method of Detect the malfunction according to DIII-NET transmission data. Malfunction Detection Malfunction...
  • Page 353 Troubleshooting (OP: Unified ON/OFF Controller) Si37-701 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 354: Display "Under Centralized Control" Blinks (Repeats Single Blink)

    Si37-701 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 355 Troubleshooting (OP: Unified ON/OFF Controller) Si37-701 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 its address controllers for centralized...
  • Page 356 Si37-701 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 357: Display "Under Centralized Control" Blinks (Repeats Double Blink)

    Troubleshooting (OP: Unified ON/OFF Controller) Si37-701 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 358 Si37-701 Troubleshooting (OP: Unified ON/OFF Controller) [CHECK 1] 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 359 Troubleshooting (OP: Unified ON/OFF Controller) Si37-701 [CHECK 3] Check the Factors of Overheat Operation Identify the defective points referring to the failure factor analysis (FTA) as follows. Hot gas circuit clogging Faulty hot Defective solenoid ← Check if coil resistance and insulation gas bypass valve coil control...
  • Page 360 Si37-701 Troubleshooting (OP: Unified ON/OFF Controller) [CHECK 4] Power Transistor Check Perform the following procedures prior to check. (1) Power Off. (2) Remove all the wiring connected to the PC board where power transistors are mounted on. ∗ Preparing a tester in the analog system is recommended. [Preparation] A tester in the digital system with diode check function will ·...
  • Page 361 Troubleshooting (OP: Unified ON/OFF Controller) Si37-701 [CHECK 5] Check for causes of rise in high pressure Referring to the Fault Tree Analysis (FTA) shown below, probe the faulty points. ←Check to be sure the stop valve is open. Stop valve closed Local High pipe ←Conduct visual checks for pipe conditions.
  • Page 362 Si37-701 Troubleshooting (OP: Unified ON/OFF Controller) [CHECK 6] Check for causes of drop in low pressure Referring to the Fault Tree Analysis (FTA) shown below, probe the faulty points. [In cooling] ←Are the electrical characteristics normal? Faulty low pressure sensor (See *1.) Faulty compressor...
  • Page 363 Troubleshooting (OP: Unified ON/OFF Controller) Si37-701 [CHECK 7] Broken Wire Check of the Connecting Wires 1. Procedure for checking outdoor-outdoor unit transmission wiring for broken wires On the system shown below, turn OFF the power supply to all equipment, short-circuit between the outdoor-outdoor unit terminal parts F1 and F2 in the "Outdoor Unit A"...
  • Page 364 Si37-701 Troubleshooting (OP: Unified ON/OFF Controller) [CHECK 8] Master Unit Central Connector Setting Table The master unit central setting connector (CN1/X1A) is mounted at the factory. • To independently use a single unit of the intelligent Touch controller or a single unit of the central remote controller, do not dismount the master unit central setting connector (i.e., use the connector with the factory setting unchanged).
  • Page 365 Troubleshooting (OP: Unified ON/OFF Controller) Si37-701 [CHECK 9] Master-Slave Unit Setting Table Combination of Intelligent Touch Controller and Central Remote Controller Master Slave ∗ Pattern Master/ Master/ Master/ Master/ 1-00~4-15 5-00~8-15 1-00~4-15 5-00~8-15 Slave Slave Slave Slave Master Master Slave Slave Master —...
  • Page 366 Si37-701 Troubleshooting (OP: Unified ON/OFF Controller) [Check 10] Check for causes of wet operation. Referring to the Fault Tree Analysis (FTA) shown below, identify faulty points. Faulty crankcase heater Refrigerant accumulation Frequent ON/OFF of compressor ←Refer to information in the [Check 6] Overcharge of refrigerant section.
  • Page 367 Troubleshooting (OP: Unified ON/OFF Controller) Si37-701 [Check 11] Check for overcharge of refrigerant. In case of VRV Systems, the only way to judge as the overcharge of refrigerant is with operating conditions due to the relationship to pressure control and electronic expansion valve control. As information for making a judgment, refer to information provided below.
  • Page 368 Si37-701 Troubleshooting (OP: Unified ON/OFF Controller) [Check 12] Check for shortage of refrigerant. In case of VRV Systems, the only way to judge as the shortage of refrigerant is with operating conditions due to the relationship to pressure control and electronic expansion valve control. As information for making a judgment, refer to information provided below.
  • Page 369 Troubleshooting (OP: Unified ON/OFF Controller) Si37-701 [Check 13] Vacuuming and dehydration procedure Conduct vacuuming and dehydration in the piping system following the procedure for <Normal vacuuming and dehydration> described below. Furthermore, if moisture may get mixed in the piping system, follow the procedure for <Special vacuuming and dehydration>...
  • Page 370 Si37-701 Troubleshooting (OP: Unified ON/OFF Controller) [Check 14] List of inverter-related malfunction codes Code Name Condition for determining malfunction Major cause Instantaneous overcurrent of • Inverter output current exceeds 32.3A even • Liquid sealing inverter compressor instantaneously. • Faulty compressor •...
  • Page 371 Troubleshooting (OP: Unified ON/OFF Controller) Si37-701 [Check 15] Concept of inverter-related malfunction codes Transmission error When transmissions between the main PC board and the inverter Main (Control) PC board PC board are not normal Instantaneous overcurrent of inverter compressor (When inverter output current exceeds 32.3A even instantaneously) Overcurrent of inverter compressor An overcurrent of 19.0A or more continues...

  • Page 372: Part 7 Appendix

    Si37-701 Part 7 Appendix 1. Piping Diagrams..................362 1.1 Outdoor Unit ..................362 1.2 Indoor Unit....................367 1.3 BS Unit ....................371 2. Wiring Diagrams for Reference............372 2.1 Outdoor Unit ..................372 2.2 Field Wiring ..................377 2.3 Indoor Unit....................380 2.4 BS Unit ....................395 3. List of Electrical and Functional Parts ..........396 3.1 Outdoor Unit ..................396 3.2 Indoor Side ...................401 4.

  • Page 373: Piping Diagrams

    Piping Diagrams Si37-701 1. Piping Diagrams Outdoor Unit REYQ8P / 10P / 12PY1 Appendix...
  • Page 374 Si37-701 Piping Diagrams REYQ14P / 16PY1 Appendix...
  • Page 375 Piping Diagrams Si37-701 REMQ8PY1 3D057743 Appendix...
  • Page 376 Si37-701 Piping Diagrams REMQ10PY1, 12PY1 3D057742 Appendix...
  • Page 377 Piping Diagrams Si37-701 REMQ14PY1, 16PY1 3D057741 Appendix...

  • Page 378: Indoor Unit

    Si37-701 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 379 Piping Diagrams Si37-701 FXZQ Refrigerant pipe connection port diameters (mm) Model Liquid φ12.7 φ6.4 FXZQ20M / 25M / 32M / 40M / 50M Appendix...
  • Page 380 Si37-701 Piping Diagrams FXDQ 4D043864H Refrigerant pipe connection port diameters (mm) Model Liquid FXDQ20N(A), P / 25N(A), P / 32N(A), P / φ12.7 φ6.4 40N(A) / 50N(A)VE(T) φ15.9 φ9.5 FXDQ63N(A)VE(T) Appendix...
  • Page 381 Piping Diagrams Si37-701 FXDYQ Gas pipe connection port Heat exchanger Liquid pipe connection port Filter Filter Electronic expansion valve 4PDA0350 Refrigerant pipe connection port diameters (mm) Model Liquid φ 15.9 φ 9.5 FXDYQ80M / 100M / 125M / 145MV1 φ 19.1 φ...

  • Page 382: Bs Unit

    Si37-701 Piping Diagrams BS Unit 4D057985A Appendix...

  • Page 383: Wiring Diagrams For Reference

    Wiring Diagrams for Reference Si37-701 2. Wiring Diagrams for Reference Outdoor Unit REYQ8 / 10 / 12PY1 Appendix...
  • Page 384 Si37-701 Wiring Diagrams for Reference REYQ14 / 16PY1 Appendix...
  • Page 385 Wiring Diagrams for Reference Si37-701 REMQ8PY1 Appendix...
  • Page 386 Si37-701 Wiring Diagrams for Reference REMQ10 / 12PY1 Appendix...
  • Page 387 Wiring Diagrams for Reference Si37-701 REMQ14P / 16PY1 Appendix...

  • Page 388: Field Wiring

    Si37-701 Wiring Diagrams for Reference Field Wiring REYQ8P / 10P / 12P / 14P / 16PY1 Appendix...
  • Page 389 Wiring Diagrams for Reference Si37-701 REYQ18P / 20P / 22P / 24P / 26P / 28P / 30P / 32PY1 Appendix...
  • Page 390 Si37-701 Wiring Diagrams for Reference REYQ34P / 36P / 38P / 40P / 42P / 44P / 46P / 48PY1 Appendix...

  • Page 391: Indoor Unit

    Wiring Diagrams for Reference Si37-701 Indoor Unit FXCQ20M / 25M / 32M / 63MVE Appendix...
  • Page 392 Si37-701 Wiring Diagrams for Reference FXCQ40M / 50M / 80M/ 125MVE Appendix...
  • Page 393 Wiring Diagrams for Reference Si37-701 FXFQ25M / 32M / 40M / 50M / 63M / 80M / 100M / 125MVE Appendix...
  • Page 394 Si37-701 Wiring Diagrams for Reference FXZQ20M / 25M / 32M / 40M / 50M8V1B Appendix...
  • Page 395 Wiring Diagrams for Reference Si37-701 FXKQ25MA / 32MA / 40MA / 63MAVE Appendix...
  • Page 396 Si37-701 Wiring Diagrams for Reference FXDQ20P / 25P / 32P FXDQ20NA / 25NA / 32NA / 40NA / 50NA / 63NAVE (with Drain Pump) Appendix...
  • Page 397 Wiring Diagrams for Reference Si37-701 FXDQ20P / 25P / 32P FXDQ20N / 25N / 32N / 40N / 50N / 63NVET (without Drain Pump) Appendix...
  • Page 398 Si37-701 Wiring Diagrams for Reference FXDYQ80M / 100M / 125M / 145MV1 Appendix...
  • Page 399 Wiring Diagrams for Reference Si37-701 FXDYQ180M / 200M / 250MV1 Appendix...
  • Page 400 Si37-701 Wiring Diagrams for Reference FXSQ20M / 25M / 32M / 40M / 50M / 63M / 80M / 100M / 125MVE Appendix...
  • Page 401 Wiring Diagrams for Reference Si37-701 FXMQ40MA / 50MA / 63MA / 80MA / 100MA / 125MAVE Appendix...
  • Page 402 Si37-701 Wiring Diagrams for Reference FXMQ200MA / 250MAVE Appendix...
  • Page 403 Wiring Diagrams for Reference Si37-701 FXHQ32MA / 63MA / 100MAVE Appendix...
  • Page 404 Si37-701 Wiring Diagrams for Reference FXAQ20MA / 25MA / 32MAVE / 40MA / 50MA / 63MAVE Appendix...
  • Page 405 Wiring Diagrams for Reference Si37-701 FXLQ20MA / 25MA / 32MA / 40MA / 50MA / 63MAVE FXNQ20MA / 25MA / 32MA / 40MA / 50MA / 63MAVE Appendix...

  • Page 406: Bs Unit

    Si37-701 Wiring Diagrams for Reference BS Unit Appendix...

  • Page 407: List Of Electrical And Functional Parts

    List of Electrical and Functional Parts Si37-701 List of Electrical and Functional Parts Outdoor Unit 3.1.1 REYQ8PY1~12PY1 Model Item Name Symbol REYQ8PY1 REYQ10PY1 REYQ12PY1 Type JT1GCVDKYR@SA Inverter OC protection 14.7A device Type JT170G-KYE@T Compressor STD 1 OC protection 15.0A device Type STD 2 —...
  • Page 408 Si37-701 List of Electrical and Functional Parts 3.1.2 REYQ14PY1~16PY1 Model Item Name Symbol REYQ14PY1 REYQ16PY1 Type JT1GCVDKYR@SA Inverter OC protection 14.7A device Type JT170G-KYE@T Compressor STD 1 OC protection 15.0A device Type JT170G-KYE@T STD 2 OC protection 15.0A device OC protection Fan motor M1F, M2F 1.2A...
  • Page 409 List of Electrical and Functional Parts Si37-701 3.1.3 REMQ8PY1 Model Item Name Symbol REMQ8PY1 Type JT1GCVDKYR@SA Inverter OC protection 14.7A device Type — Compressor STD 1 OC protection — device Type — STD 2 OC protection — device OC protection Fan motor 3.0A device...
  • Page 410 Si37-701 List of Electrical and Functional Parts 3.1.4 REMQ10PY1~12PY1 Model Item Name Symbol REMQ10PY1 REMQ12PY1 Type JT1GCVDKYR@SA Inverter OC protection 14.7A device Type JT170G-KYE@T Compressor STD 1 OC protection 15.0A device Type — STD 2 OC protection — device OC protection Fan motor 3.0A device...
  • Page 411 List of Electrical and Functional Parts Si37-701 3.1.5 REMQ14PY1~16PY1 Model Item Name Symbol REMQ14PY1 REMQ16PY1 Type JT1GCVDKYR@SA Inverter OC protection 14.7A device Type JT170G-KYE@T Compressor STD 1 OC protection 15.0A device Type JT170G-KYE@T STD 2 OC protection 15.0A device OC protection Fan motor M1F, M2F 1.2A...

  • Page 412: Indoor Side

    Si37-701 List of Electrical and Functional Parts Indoor Side 3.2.1 Indoor Unit Model Parts Name Symbol Remark FXFQ25 FXFQ32 FXFQ40 FXFQ50 FXFQ63 FXFQ80 FXFQ100 FXFQ125 Wired Remote BRC1C62 Controller Remote Option Controller Wireless Remote BRC7E61W Controller Fan Motor DC380V 30W 8P DC 380V 120W 8P AC220-240V (50Hz) AC220V (60Hz) Drain Pump...
  • Page 413 List of Electrical and Functional Parts Si37-701 Model Parts Name Symbol Remark FXZQ FXZQ FXZQ FXZQ FXZQ 20MVE 25MVE 32MVE 40MVE 50MVE Wired Remote BRC1C61 Controller Remote Option Controller Wireless Remote BRC7E530W Controller AC 220~240V 50Hz 1 φ 55W 4P Fan Motor Thermal Fuse 135°C 4.0 µ...
  • Page 414 Si37-701 List of Electrical and Functional Parts Model Parts Name Symbol Remark FXKQ FXKQ FXKQ FXKQ 25MAVE 32MAVE 40MAVE 63MAVE Wired Remote BRC1C62 Option Controller Remote Controller Wireless Remote BRC4C61 Controller AC 220~240V 50Hz 1 φ 15W 4P 1 φ 20W 4P 1 φ...
  • Page 415 List of Electrical and Functional Parts Si37-701 Model Parts Name Symbol Remark FXSQ FXSQ FXSQ FXSQ FXSQ FXSQ FXSQ FXSQ FXSQ 20MVE 25MVE 32MVE 40MVE 50MVE 63MVE 80MVE 100MVE 125MVE Wired Remote BRC1C62 Controller Remote Option Controller Wireless Remote BRC4C62 Controller AC 220~240V 50Hz 1 φ...
  • Page 416 Si37-701 List of Electrical and Functional Parts Model Parts Name Symbol Remark FXHQ FXHQ FXHQ 32MAVE 63MAVE 100MAVE Wired Remote BRC1C62 Option Remote Controller Controller Wireless Controller BRC7E63W AC 220~240V/220V 50Hz/60Hz 1 φ 63W 1 φ 130W Fan Motor Thermal protector 130°C : OFF 80°C : ON Motors 3.0 µ...
  • Page 417 List of Electrical and Functional Parts Si37-701 Model Parts Name Symbol Remark FXLQ FXLQ FXLQ FXLQ FXLQ FXLQ 20MAVE 25MAVE 32MAVE 40MAVE 50MAVE 63MAVE Wired Remote BRC1C62 Controller Remote Option Controller Wireless Remote BRC4C62 Controller AC 220~240V 50Hz 1 φ 15W 1 φ...

  • Page 418: Option List

    Si37-701 Option List Option List Option List of Controllers Operation Control System Optional Accessories Type FXDQ-P FXMQ- FXLQ-MA FXCQ-M FXFQ-M FXZQ-M8 FXKQ-MA FXDQ-NA FXSQ-M FXDYQ-M FXHQ-MA FXAQ-MA Item FXNQ-MA Wireless H/R BRC7C62 BRC7E61W BRC7E530W7 BRC4C61 BRC4C62 BRC4C62 BRC4C62 BRC4C62 BRC7E63W BRC7E618 BRC4C62 Remote controller Wired...
  • Page 419 Option List Si37-701 Building Management System Part name Model No. Function intelligent Touch • Air-Conditioning management system that can be controlled by a Basic Hardware DCS601C51 Controller compact all-in-one unit. Hardware DIII-NET plus adaptor DCS601A52 • Additional 64 groups (10 outdoor units) is possible. intelligent Touch Controller P.

  • Page 420: Option Lists (Outdoor Unit)

    Si37-701 Option List Option Lists (Outdoor Unit) REYQ8 ~ 16PY1(E) Series VRV III H/R REYQ10PY1 REYQ10PY1E REYQ12PY1 REYQ12PY1E REYQ8PY1 REYQ8PY1E Models REYQ14PY1 REYQ14PY1E Optional accessories REYQ16PY1 REYQ16PY1E KHRP25M33H KHRP25M33H, KHRP25M72H Refnet header Model (Max. 8 branch) (Max. 8 branch) (Max. 8 branch) KHRP25A22T, KHRP25A33T Refnet joint Model...

  • Page 421: Piping Installation Point

    Piping Installation Point Si37-701 Piping Installation Point Piping Installation Point 5m or less than 5m Maximum length from a connection Connection Connection kit. 10m or less from first branch. Kit A Kit B (Equivalent Piping Length 13m) Since there is a possibility that oil may be collected on a stop machine side, install piping between outdoor units to go to level or go up to an outdoor unit, and to make a slope.

  • Page 422: The Example Of A Wrong Pattern

    Si37-701 Piping Installation Point The Example of a Wrong Pattern Wrong × Oil is collected to the outdoor unit at the time of a stop, because of bottom omission of piping. (V3039) Wrong × Oil is collected to the low level outdoor unit at the time of a stop, because of downward slope of piping.
  • Page 423 Piping Installation Point Si37-701 Appendix...

  • Page 424: Example Of Connection (R-410A Type)

    Si37-701 Example of Connection (R-410A Type) 6. Example of Connection (R-410A Type) Branch with REFNET joint Branch with REFNET joint and header Branch with REFNET header Example of connection (Connection of 8 indoor units) Outdoor unit Outdoor unit Outdoor unit Outdoor unit Indoor unit REFNET joint (A~G)
  • Page 425 Example of Connection (R-410A Type) Si37-701 How to select the REFNET joint How to select the REFNET header Outdoor unit multi connection piping kit and Refrigerant branch kit selection When using REFNET joint at the first branch counted from the outdoor unit side, Choose from the following table in accordance with the total capacity index of all choose from the following table in accordance with the outdoor unit capacity type.
  • Page 426 Si37-701 Example of Connection (R-410A Type) How to calculate the REFRIGERANT AMOUNT HEAT RECOVER SYSTEM additional refrigerant Total length(m) Total length(m) FOR EXCEEDING CONNECTION MODEL NAME THE AMOUNT OF REFRIGERANT 0.37 0.26 of liquid piping of liquid piping to be charged CAPACITY OF INDOOR UNIT size at φ22.2 size at φ19.1)
  • Page 427 Example of Connection (R-410A Type) Si37-701 Appendix...

  • Page 428: Thermistor Resistance / Temperature Characteristics

    Si37-701 Thermistor Resistance / Temperature Characteristics 7. Thermistor Resistance / Temperature Characteristics Indoor unit For air suction For liquid pipe For gas pipe Outdoor unit for fin thermistor R1T Outdoor unit For outdoor air For coil For suction pipe For Receiver gas pipe For Receiver outlet liquid pipe (k Ω...
  • Page 429 Thermistor Resistance / Temperature Characteristics Si37-701 Outdoor Unit Thermistors for Discharge Pipe ∼ (R3T, R31 33T) (k Ω )) 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...

  • Page 430: Pressure Sensor

    Si37-701 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 431: Method Of Checking The Inverter's Power Transistors And Diode Modules

    Method of Checking the Inverter’s Power Transistors and Diode Modules Si37-701 Method of Checking the Inverter’s Power Transistors and Diode Modules Method of Checking the Inverter’s Power Transistors and Diode Modules Checking failures in power semiconductors mounted on inverter PC board Check the power semiconductors mounted on the inverter PC board by the use of a multiple tester.
  • Page 432 Si37-701 Method of Checking the Inverter’s Power Transistors and Diode Modules 1. Power module checking When using the analog type of multiple When using the digital type of multiple tester, make measurement in resistance tester, make measurement in diode check measurement mode in the x1k Ω...
  • Page 433 Method of Checking the Inverter’s Power Transistors and Diode Modules Si37-701 Appendix...

  • Page 434: Part 8 Precautions For New Refrigerant (R-410A)

    Si37-701 Part 8 Precautions for New Refrigerant (R-410A) 1. Precautions for New Refrigerant (R-410A) .........424 1.1 Outline ....................424 1.2 Refrigerant Cylinders................426 1.3 Service Tools..................427 Precautions for New Refrigerant (R-410A)

  • Page 435: Precautions For New Refrigerant (R-410A)

    Precautions for New Refrigerant (R-410A) Si37-701 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 436 Si37-701 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 437: Refrigerant Cylinders

    Precautions for New Refrigerant (R-410A) Si37-701 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 438: Service Tools

    Si37-701 Precautions for New Refrigerant (R-410A) Service Tools R-410A is used under higher working pressure, compared to previous refrigerants (R-22,R-407C). Furthermore, the refrigerating machine oil has been changed from Suniso oil to Ether oil, and if oil mixing is occurred, sludge results in the refrigerants and causes other problems.
  • Page 439 Precautions for New Refrigerant (R-410A) Si37-701 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 440 Si37-701 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 441 Precautions for New Refrigerant (R-410A) Si37-701 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 442 Si37-701 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 443 Precautions for New Refrigerant (R-410A) Si37-701 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 444: Index

    Si37-701 Index A0 .................230 Defective Inverter PC Board ....... 283 A1 .................231 Detailed Explanation of Setting Modes ....174 A3 .................232 Display “Under Centralized Control” Blinks A6 ............234, 236, 237 (Repeats Double Blink) ........ 346 A7 .................238 Display “Under Centralized Control” Blinks A9 ..............240, 242 (Repeats Single Blink) ........
  • Page 445 Si37-701 Malfunction of Thermistor (R1T) for Suction Air ............ 248 J2 .................271 Malfunction of Thermistor (R2T) for J3 .................272 Heat Exchanger ........... 246 J4 .................273 Malfunction of Thermistor (R3T) for Gas Pipes ... 247 J5 .................274 Malfunction of Thermistor (R4T or R12T) for Outdoor J6 .................275 Unit Heat Exchanger ........
  • Page 446 Si37-701 Refrigerant Circuit ..........50 BS Unit Functional Parts .........60 Indoor Units .............61 REMQ10PY1, 12PY1 (Multi 10, 12HP) ...56 REMQ14PY1, 16PY1 (Multi 14, 16HP) ...58 REMQ8PY1 (Multi 8HP) ........54 REYQ14P, 16P ..........52 REYQ8P, 10P, 12P .........50 Refrigerant Flow for Each Operation Mode ....67 REYQ14P, 16P ..........75 REYQ18P, 20P ..........83 REYQ8P, 10P, 12P .........67...
  • Page 447 Si37-701 Index...

  • Page 448: Drawings & Flow Charts

    Si37-701 Drawings & Flow Charts Display “Under Centralized Control” Blinks (Repeats Single Blink) ......... 343 Abnormal Discharge Pipe Temperature ....263 Drain Level above Limit ........244 Abnormal Outdoor Fan Motor Signal ....268 Drain Pump Control ..........139 Actuation of High Pressure Switch .......251 When the Float Switch is Tripped and “AF”...
  • Page 449 Si37-701 Inverter Protection Control ........129 Malfunction of Transmission between Optional Controllers for Centralized Control ....337 Malfunction of Transmission between Remote Louver Control for Preventing Ceiling Dirt ....146 Controller and Indoor Unit ......314 Low Pressure Protection Control ......126 Master Unit Central Connector Setting Table ..353 Master-Slave Unit Setting Table ......
  • Page 450 Si37-701 Self-diagnosis by Wired Remote Controller ..216 Self-diagnosis by Wireless Remote Controller ..217 Setting by Push Button Switches ......188 Setting Mode 1 .............190 Setting Mode 2 .............191 Setting of Low Noise Operation and Demand Operation ............198 Image of Operation in the Case of A ..199 Image of Operation in the Case of A and B ........
  • Page 451 Si37-701 viii Drawings & Flow Charts...
  • Page 452 Specifications, designs and other content appearing in this brochure are current as of September 2007 but subject to change without notice. Si37-701 Printed in Japan 09/2007 AK...

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