Daikin SkyAir RZR-TA Series Service Manual
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Daikin SkyAir RZR-TA Series Service Manual

Daikin SkyAir RZR-TA Series Service Manual

Cooling only 60 hz, heat pump 60 hz
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SiUS281811EB
Service
Manual
RZR-TA/TB, RZQ-TA/TB Series
Cooling Only 60 Hz
Heat Pump 60 Hz

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Joel Moore
June 10, 2025

How do I turn off 1 of the supply lovers

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May 28, 2025

RZQ18TBVJUA Not getting 16v dc at condenser before or after I replaced the PCB

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Summary of Contents for Daikin SkyAir RZR-TA Series

  • Page 1 SiUS281811EB Service Manual RZR-TA/TB, RZQ-TA/TB Series Cooling Only 60 Hz Heat Pump 60 Hz...

  • Page 2: Table Of Contents

    SiUS281811EB Introduction ..................1 1. Safety Cautions...................2 1.1 Warnings and Cautions Regarding Safety of Workers......... 2 1.2 Warnings and Cautions Regarding Safety of Users........4 2. Icons Used ....................7 3. Revision History ..................8 Part 1 General Information ............... 9 1. Model Names and Power Supply..............10 1.1 Cooling Only....................
  • Page 3 SiUS281811EB 5.2 BRC1H71W....................132 5.3 Wireless Remote Controller ..............133 6. Service Settings Menu, Maintenance Menu..........134 6.1 BRC1E73 ....................134 6.2 Wireless Remote Controller ..............138 7. Administrator Menu, Installer Menu ............139 7.1 BRC1H71W....................139 Part 4 Functions and Control ............140 1.
  • Page 4 SiUS281811EB Part 5 Field Settings and Test Operation ........178 1. Field Setting from Remote Controller............179 1.1 Wired Remote Controller................179 1.2 Simplified Remote Controller..............184 1.3 Wireless Remote Controller ..............185 1.4 List of Field Settings for Indoor Unit ............186 1.5 Details of Field Settings for Indoor Unit............
  • Page 5 SiUS281811EB 5.6 Drain Level Control System (S1L) Abnormality........252 5.7 Indoor Fan Motor (M1F) Lock, Overload ..........254 5.8 Indoor Fan Motor Abnormality..............256 5.9 Blower Motor Not Running ............... 262 5.10 Indoor Fan Motor Status Abnormality............263 5.11 Low Indoor Airflow..................264 5.12 Swing Flap Motor Abnormality ..............
  • Page 6 SiUS281811EB 5.53 Transmission Error between Indoor and Outdoor Units in the Same System ..................... 329 5.54 Improper Combination of Indoor and Outdoor Units, Indoor Units and Remote Controller ..................330 5.55 Incorrect Electric Heater Capacity Setting..........332 5.56 Address Duplication of Centralized Controller.......... 333 5.57 Transmission Error between Centralized Controller and Indoor Unit ..

  • Page 7: Introduction

    SiUS281811EB Introduction 1. Safety Cautions...................2 1.1 Warnings and Cautions Regarding Safety of Workers......... 2 1.2 Warnings and Cautions Regarding Safety of Users........4 2. Icons Used ....................7 3. Revision History ..................8 Introduction...

  • Page 8: Safety Cautions

    Safety Cautions SiUS281811EB 1. Safety Cautions Be sure to read the following safety cautions before conducting repair work. After the repair work is complete, be sure to conduct a test operation to ensure that the equipment operates normally, and explain the cautions for operating the product to the customer. This manual is for the person in charge of maintenance and...
  • Page 9 SiUS281811EB Safety Cautions Warning Be sure to discharge the capacitor completely before conducting repair work. The step-up capacitor supplies high-voltage electricity to the electrical components of the outdoor unit. A charged capacitor may cause an electrical shock. Do not turn the air conditioner on or off by plugging in or unplugging the power cable.

  • Page 10: Warnings And Cautions Regarding Safety Of Users

    Safety Cautions SiUS281811EB Caution Be sure to check that the refrigerating cycle section has cooled down enough before conducting repair work. Working on the unit when the refrigerating cycle section is hot may cause burns. Conduct welding work in a well-ventilated place. Using the welder in an enclosed room may cause oxygen deficiency.
  • Page 11 SiUS281811EB Safety Cautions Warning Do not mix air or gas other than the specified refrigerant (R-410A) in the refrigerant system. If air enters the refrigerant system, an excessively high pressure results, causing equipment damage and injury. If the refrigerant gas leaks, be sure to locate the leaking point and repair it before charging the refrigerant.
  • Page 12 Safety Cautions SiUS281811EB Caution Be sure to measure insulation resistance after the repair, and make sure that the resistance is 1 M or greater. Faulty insulation may cause an electrical shock. Be sure to check the drainage of the indoor unit after the repair. Faulty drainage may cause water to enter the room and wet the furniture and floor.

  • Page 13: Icons Used

    SiUS281811EB Icons Used 2. Icons Used The following icons are used to attract the attention of the reader to specific information. Icon Type of Description Information Warning Warning is used when there is danger of personal injury. Warning Caution Caution is used when there is danger that the reader, Caution through incorrect manipulation, may damage equipment, lose data, get an unexpected result or have to restart (part...

  • Page 14: Revision History

    Revision History SiUS281811EB 3. Revision History Month / Year Version Revised contents 04 / 2019 SiUS281811E First edition 03 / 2020 SiUS281811EA Model addition: RZR18-48TAVJUA, RZQ18-48TAVJUA Model addition: 12 / 2022 SiUS281811EB RZR18-48TBVJUA, RZQ18-48TBVJUA, FCQ18-48AAVJU, FBQ18-48TBVJU, BRC1H71W Introduction...

  • Page 15: Part 1 General Information

    SiUS281811EB Part 1 General Information 1. Model Names and Power Supply..............10 1.1 Cooling Only....................10 1.2 Heat Pump ....................12 2. External Appearance.................14 2.1 Indoor Unit....................14 2.2 Outdoor Unit ....................16 2.3 Remote Controller ..................17 3. Specifications ....................18 3.1 Cooling Only....................

  • Page 16: Model Names And Power Supply

    Model Names and Power Supply SiUS281811EB 1. Model Names and Power Supply Cooling Only Indoor unit Outdoor unit Power supply Ceiling mounted cassette type FCQ18TAVJU RZR18TAVJU (Round flow with sensing panel) FCQ24TAVJU RZR24TAVJU FCQ30TAVJU RZR30TAVJU FCQ36TAVJU RZR36TAVJU FCQ42TAVJU RZR42TAVJU FCQ48TAVJU RZR48TAVJU FCQ18TAVJU RZR18TAVJUA...
  • Page 17 SiUS281811EB Model Names and Power Supply Indoor unit Outdoor unit Power supply HSP ceiling mounted duct type FBQ18TBVJU RZR18TBVJUA FBQ24TBVJU RZR24TBVJUA FBQ30TBVJU RZR30TBVJUA FBQ36TBVJU RZR36TBVJUA FBQ42TBVJU RZR42TBVJUA FBQ48TBVJU RZR48TBVJUA Multi position air handling unit FTQ18TAVJUD RZR18TAVJU FTQ24TAVJUD RZR24TAVJU FTQ30TAVJUD RZR30TAVJU FTQ36TAVJUD RZR36TAVJU FTQ42TAVJUD...

  • Page 18: Heat Pump

    Model Names and Power Supply SiUS281811EB Heat Pump Indoor unit Outdoor unit Power supply Ceiling mounted cassette type FCQ18TAVJU RZQ18TAVJU (Round flow with sensing panel) FCQ24TAVJU RZQ24TAVJU FCQ30TAVJU RZQ30TAVJU FCQ36TAVJU RZQ36TAVJU FCQ42TAVJU RZQ42TAVJU FCQ48TAVJU RZQ48TAVJU FCQ18TAVJU RZQ18TAVJUA FCQ24TAVJU RZQ24TAVJUA FCQ30TAVJU RZQ30TAVJUA FCQ36TAVJU RZQ36TAVJUA...
  • Page 19 SiUS281811EB Model Names and Power Supply Indoor unit Outdoor unit Power supply HSP ceiling mounted duct type FBQ18TBVJU RZQ18TBVJUA FBQ24TBVJU RZQ24TBVJUA FBQ30TBVJU RZQ30TBVJUA FBQ36TBVJU RZQ36TBVJUA FBQ42TBVJU RZQ42TBVJUA FBQ48TBVJU RZQ48TBVJUA Multi position air handling unit FTQ18TAVJUD RZQ18TAVJU FTQ24TAVJUD RZQ24TAVJU FTQ30TAVJUD RZQ30TAVJU FTQ36TAVJUD RZQ36TAVJU FTQ42TAVJUD...

  • Page 20: External Appearance

    External Appearance SiUS281811EB 2. External Appearance Indoor Unit Ceiling Mounted Cassette Type (Round Flow with Sensing Panel) FCQ18TAVJU FCQ24TAVJU FCQ30TAVJU FCQ36TAVJU FCQ42TAVJU FCQ48TAVJU Shown with BYCQ125B-W1 FCQ18AAVJU FCQ24AAVJU FCQ30AAVJU FCQ36AAVJU FCQ42AAVJU FCQ48AAVJU Shown with BYCQ54EEFU Ceiling Suspended Type FHQ18PVJU FHQ24PVJU FHQ30PVJU FHQ36MVJU FHQ42MVJU...
  • Page 21 SiUS281811EB External Appearance HSP Ceiling Mounted Duct Type FBQ18PVJU FBQ24PVJU FBQ30PVJU FBQ36PVJU FBQ42PVJU FBQ48PVJU FBQ18TBVJU FBQ24TBVJU FBQ30TBVJU FBQ36TBVJU FBQ42TBVJU FBQ48TBVJU Multi Position Air Handling Unit FTQ18TAVJUD FTQ18TAVJUA FTQ24TAVJUD FTQ24TAVJUA FTQ30TAVJUD FTQ30TAVJUA FTQ36TAVJUD FTQ36TAVJUA FTQ42TAVJUD FTQ42TAVJUA FTQ48TAVJUD FTQ48TAVJUA Part 1 General Information...

  • Page 22: Outdoor Unit

    External Appearance SiUS281811EB Outdoor Unit RZR18TAVJU RZR18TAVJUA RZR24TAVJU RZR24TAVJUA RZQ18TAVJU RZQ18TAVJUA RZQ24TAVJU RZQ24TAVJUA RZR18TBVJUA RZR24TBVJUA RZQ18TBVJUA RZQ24TBVJUA RZR30TAVJU RZR30TAVJUA RZR36TAVJU RZR36TAVJUA RZR42TAVJU RZR42TAVJUA RZR48TAVJU RZR48TAVJUA RZQ30TAVJU RZQ30TAVJUA RZQ36TAVJU RZQ36TAVJUA RZQ42TAVJU RZQ42TAVJUA RZQ48TAVJU RZQ48TAVJUA RZR30TBVJUA RZR36TBVJUA RZR42TBVJUA RZR48TBVJUA RZQ30TBVJUA RZQ36TBVJUA RZQ42TBVJUA RZQ48TBVJUA Part 1 General Information...

  • Page 23: Remote Controller

    SiUS281811EB External Appearance Remote Controller Wired remote controller Navigation: BRC1E73 Madoka: BRC1H71W Wireless remote controller BRC7E83 (FHQ) BRC7E818 (FAQ) BRC4C82 (FBQ-P (1), FTQ) BRC082A43 (FBQ-P (1), FBQ-TB) 1. For FBQ-P series, the fan step control is different according to the wireless remote controller used. BRC4C82 (Fan: 2 steps) BRC082A43 (Fan: 3 steps) Part 1 General Information...

  • Page 24: Specifications

    Specifications SiUS281811EB 3. Specifications Cooling Only 3.1.1 Ceiling Mounted Cassette Type (Round Flow with Sensing Panel) Model Indoor unit FCQ18TAVJU FCQ24TAVJU name Outdoor unit RZR18TAVJU RZR24TAVJU Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 2 Cooling capacity Btu/h 18,000 (5.3)
  • Page 25 SiUS281811EB Specifications Model Indoor unit FCQ30TAVJU FCQ36TAVJU name Outdoor unit RZR30TAVJU RZR36TAVJU Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 2 Cooling capacity Btu/h 30,000 (8.8) 36,000 (10.6) (kW) SEER (Rated) 17.2 17.6 EER (Rated) Btu/h∙W 11.4...
  • Page 26 Specifications SiUS281811EB Model Indoor unit FCQ42TAVJU FCQ48TAVJU name Outdoor unit RZR42TAVJU RZR48TAVJU Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 2 Cooling capacity Btu/h 42,000 (12.3) 48,000 (14.1) (kW) SEER (Rated) 17.0 17.0 EER (Rated) Btu/h∙W 10.3...
  • Page 27 SiUS281811EB Specifications Model Indoor unit FCQ18TAVJU FCQ24TAVJU name Outdoor unit RZR18TAVJUA RZR24TAVJUA Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 2 Cooling capacity Btu/h 18,000 (5.3) 24,000 (7.0) (kW) SEER (Rated) 18.6 18.5 EER (Rated) Btu/h∙W 13.0...
  • Page 28 Specifications SiUS281811EB Model Indoor unit FCQ30TAVJU FCQ36TAVJU name Outdoor unit RZR30TAVJUA RZR36TAVJUA Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 2 Cooling capacity Btu/h 30,000 (8.8) 36,000 (10.6) (kW) SEER (Rated) 17.2 17.6 EER (Rated) Btu/h∙W 11.4...
  • Page 29 SiUS281811EB Specifications Model Indoor unit FCQ42TAVJU FCQ48TAVJU name Outdoor unit RZR42TAVJUA RZR48TAVJUA Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 2 Cooling capacity Btu/h 42,000 (12.3) 48,000 (14.1) (kW) SEER (Rated) 17.0 17.0 EER (Rated) Btu/h∙W 10.3...
  • Page 30 Specifications SiUS281811EB Model Indoor unit FCQ18AAVJU FCQ24AAVJU name Outdoor unit RZR18TBVJUA RZR24TBVJUA Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 2 Cooling capacity Btu/h 18,000 (5.3) 24,000 (7.0) (kW) Indoor unit FCQ18AAVJU FCQ24AAVJU Casing color Galvanized steel plate Galvanized steel plate...
  • Page 31 SiUS281811EB Specifications Model Indoor unit FCQ30AAVJU FCQ36AAVJU name Outdoor unit RZR30TBVJUA RZR36TBVJUA Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 2 Cooling capacity Btu/h 30,000 (8.8) 36,000 (10.6) (kW) Indoor unit FCQ30AAVJU FCQ36AAVJU Casing color Galvanized steel plate Galvanized steel plate...
  • Page 32 Specifications SiUS281811EB Model Indoor unit FCQ42AAVJU FCQ48AAVJU name Outdoor unit RZR42TBVJUA RZR48TBVJUA Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 2 Cooling capacity Btu/h 42,000 (12.3) 48,000 (14.1) (kW) Indoor unit FCQ42AAVJU FCQ48AAVJU Casing color Galvanized steel plate Galvanized steel plate...

  • Page 33: Ceiling Suspended Type

    SiUS281811EB Specifications 3.1.2 Ceiling Suspended Type Model Indoor unit FHQ18PVJU FHQ24PVJU name Outdoor unit RZR18TAVJU RZR24TAVJU Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 2 Cooling capacity Btu/h 18,000 (5.3) 24,000 (7.0) (kW) SEER (Rated) 16.3 16.6...
  • Page 34 Specifications SiUS281811EB Model Indoor unit FHQ30PVJU FHQ36MVJU name Outdoor unit RZR30TAVJU RZR36TAVJU Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 2 Cooling capacity Btu/h 30,000 (8.8) 36,000 (10.6) (kW) SEER (Rated) 16.0 14.0 EER (Rated) Btu/h∙W 10.5...
  • Page 35 SiUS281811EB Specifications Model Indoor unit FHQ42MVJU name Outdoor unit RZR42TAVJU Power supply 1 phase, 208/230 V, 60 Hz 1 2 Cooling capacity Btu/h 40,500 (11.9) (kW) SEER (Rated) 14.0 EER (Rated) Btu/h∙W Indoor unit FHQ42MVJU Casing color White (10Y9/0.5) Dimensions: (H×W×D) in (mm) 7-11/16 ×...
  • Page 36 Specifications SiUS281811EB Model Indoor unit FHQ18PVJU FHQ24PVJU name Outdoor unit RZR18TAVJUA RZR24TAVJUA Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 2 Cooling capacity Btu/h 18,000 (5.3) 24,000 (7.0) (kW) SEER (Rated) 16.3 16.6 EER (Rated) Btu/h∙W 12.9...
  • Page 37 SiUS281811EB Specifications Model Indoor unit FHQ30PVJU FHQ36MVJU name Outdoor unit RZR30TAVJUA RZR36TAVJUA Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 2 Cooling capacity Btu/h 30,000 (8.8) 36,000 (10.6) (kW) SEER (Rated) 16.0 14.0 EER (Rated) Btu/h∙W 10.5...
  • Page 38 Specifications SiUS281811EB Model Indoor unit FHQ42MVJU name Outdoor unit RZR42TAVJUA Power supply 1 phase, 208/230 V, 60 Hz 1 2 Cooling capacity Btu/h 40,500 (11.9) (kW) SEER (Rated) 14.0 EER (Rated) Btu/h∙W Indoor unit FHQ42MVJU Casing color White (10Y9/0.5) Dimensions: (H×W×D) in (mm) 7-11/16 ×...

  • Page 39: Wall Mounted Type

    SiUS281811EB Specifications 3.1.3 Wall Mounted Type Model Indoor unit FAQ18TAVJU FAQ24TAVJU name Outdoor unit RZR18TAVJU RZR24TAVJU Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 2 Cooling capacity Btu/h 18,000 (5.3) 24,000 (7.0) (kW) SEER (Rated) 17.0 17.6...
  • Page 40 Specifications SiUS281811EB Model Indoor unit FAQ18TAVJU FAQ24TAVJU name Outdoor unit RZR18TAVJUA RZR24TAVJUA Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 2 Cooling capacity Btu/h 18,000 (5.3) 24,000 (7.0) (kW) SEER (Rated) 17.0 17.6 EER (Rated) Btu/h∙W 11.9...
  • Page 41 SiUS281811EB Specifications Model Indoor unit FAQ18TAVJU FAQ24TAVJU name Outdoor unit RZR18TBVJUA RZR24TBVJUA Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 2 Cooling capacity Btu/h 18,000 (5.3) 24,000 (7.0) (kW) Indoor unit FAQ18TAVJU FAQ24TAVJU Casing color White (3.0Y8.5/0.5) White (3.0Y8.5/0.5)
  • Page 42 Specifications SiUS281811EB 3.1.4 HSP Ceiling Mounted Duct Type Model Indoor unit FBQ18PVJU FBQ24PVJU name Outdoor unit RZR18TAVJU RZR24TAVJU Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 2 Cooling capacity Btu/h 18,000 (5.3) 24,000 (7.0) (kW) SEER (Rated) 16.7...
  • Page 43 SiUS281811EB Specifications Model Indoor unit FBQ30PVJU FBQ36PVJU name Outdoor unit RZR30TAVJU RZR36TAVJU Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 2 Cooling capacity Btu/h 30,000 (8.8) 36,000 (10.6) (kW) SEER (Rated) 16.0 17.5 EER (Rated) Btu/h∙W 10.5...
  • Page 44 Specifications SiUS281811EB Model Indoor unit FBQ42PVJU FBQ48PVJU name Outdoor unit RZR42TAVJU RZR48TAVJU Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 2 Cooling capacity Btu/h 40,500 (11.9) 48,000 (14.1) (kW) SEER (Rated) 16.0 14.0 EER (Rated) Btu/h∙W 10.1...
  • Page 45 SiUS281811EB Specifications Model Indoor unit FBQ18PVJU FBQ24PVJU name Outdoor unit RZR18TAVJUA RZR24TAVJUA Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 2 Cooling capacity Btu/h 18,000 (5.3) 24,000 (7.0) (kW) SEER (Rated) 16.7 16.5 EER (Rated) Btu/h∙W 13.0...
  • Page 46 Specifications SiUS281811EB Model Indoor unit FBQ30PVJU FBQ36PVJU name Outdoor unit RZR30TAVJUA RZR36TAVJUA Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 2 Cooling capacity Btu/h 30,000 (8.8) 36,000 (10.6) (kW) SEER (Rated) 16.0 17.5 EER (Rated) Btu/h∙W 10.5...
  • Page 47 SiUS281811EB Specifications Model Indoor unit FBQ42PVJU FBQ48PVJU name Outdoor unit RZR42TAVJUA RZR48TAVJUA Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 2 Cooling capacity Btu/h 40,500 (11.9) 48,000 (14.1) (kW) SEER (Rated) 16.0 14.0 EER (Rated) Btu/h∙W 10.1...
  • Page 48 Specifications SiUS281811EB Model Indoor unit FBQ18TBVJU FBQ24TBVJU name Outdoor unit RZR18TBVJUA RZR24TBVJUA Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 2 Cooling capacity Btu/h 17,700 (5.2) 23,400 (6.9) (kW) Indoor unit FBQ18TBVJU FBQ24TBVJU Casing color Galvanized steel plate Galvanized steel plate...
  • Page 49 SiUS281811EB Specifications Model Indoor unit FBQ30TBVJU FBQ36TBVJU name Outdoor unit RZR30TBVJUA RZR36TBVJUA Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 2 Cooling capacity Btu/h 28,400 (8.3) 35,000 (10.3) (kW) Indoor unit FBQ30TBVJU FBQ36TBVJU Casing color Galvanized steel plate Galvanized steel plate...
  • Page 50 Specifications SiUS281811EB Model Indoor unit FBQ42TBVJU FBQ48TBVJU name Outdoor unit RZR42TBVJUA RZR48TBVJUA Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 2 Cooling capacity Btu/h 40,000 (11.7) 46,500 (13.6) (kW) Indoor unit FBQ42TBVJU FBQ48TBVJU Casing color Galvanized steel plate Galvanized steel plate...
  • Page 51 12.5 10.3 Indoor unit FTQ18TAVJUD, FTQ18TAVJUA FTQ24TAVJUD, FTQ24TAVJUA Casing color Daikin Slate Gray Daikin Slate Gray Dimensions: (H×W×D) in (mm) 45 × 17.5 × 21 (1,143 × 445 × 533) 45 × 17.5 × 21 (1,143 × 445 × 533)
  • Page 52 12.5 11.3 Indoor unit FTQ30TAVJUD, FTQ30TAVJUA FTQ36TAVJUD, FTQ36TAVJUA Casing color Daikin Slate Gray Daikin Slate Gray Dimensions: (H×W×D) in (mm) 45 × 17.5 × 21 (1,143 × 445 × 533) 45 × 17.5 × 21 (1,143 × 445 × 533)
  • Page 53 Btu/h∙W 11.0 Indoor unit FTQ42TAVJUD, FTQ42TAVJUA FTQ48TAVJUD, FTQ48TAVJUA Casing color Daikin Slate Gray Daikin Slate Gray Dimensions: (H×W×D) in (mm) 53.43 × 21 × 21 (1,357 × 533 × 533) 53.43 × 21 × 21 (1,357 × 533 × 533)
  • Page 54 12.5 10.3 Indoor unit FTQ18TAVJUD, FTQ18TAVJUA FTQ24TAVJUD, FTQ24TAVJUA Casing color Daikin Slate Gray Daikin Slate Gray Dimensions: (H×W×D) in (mm) 45 × 17.5 × 21 (1,143 × 445 × 533) 45 × 17.5 × 21 (1,143 × 445 × 533)
  • Page 55 12.5 11.3 Indoor unit FTQ30TAVJUD, FTQ30TAVJUA FTQ36TAVJUD, FTQ36TAVJUA Casing color Daikin Slate Gray Daikin Slate Gray Dimensions: (H×W×D) in (mm) 45 × 17.5 × 21 (1,143 × 445 × 533) 45 × 17.5 × 21 (1,143 × 445 × 533)
  • Page 56 Btu/h∙W 11.0 Indoor unit FTQ42TAVJUD, FTQ42TAVJUA FTQ48TAVJUD, FTQ48TAVJUA Casing color Daikin Slate Gray Daikin Slate Gray Dimensions: (H×W×D) in (mm) 53.43 × 21 × 21 (1,357 × 533 × 533) 53.43 × 21 × 21 (1,357 × 533 × 533)
  • Page 57 15.6 16.2 Indoor unit FTQ18TAVJUD, FTQ18TAVJUA FTQ24TAVJUD, FTQ24TAVJUA Casing color Daikin Slate Gray Daikin Slate Gray Dimensions: (H×W×D) in (mm) 45 × 17.5 × 21 (1,143 × 445 × 533) 45 × 17.5 × 21 (1,143 × 445 × 533)
  • Page 58 15.6 16.4 Indoor unit FTQ30TAVJUD, FTQ30TAVJUA FTQ36TAVJUD, FTQ36TAVJUA Casing color Daikin Slate Gray Daikin Slate Gray Dimensions: (H×W×D) in (mm) 45 × 17.5 × 21 (1,143 × 445 × 533) 45 × 17.5 × 21 (1,143 × 445 × 533)
  • Page 59 16.0 15.3 Indoor unit FTQ42TAVJUD, FTQ42TAVJUA FTQ48TAVJUD, FTQ48TAVJUA Casing color Daikin Slate Gray Daikin Slate Gray Dimensions: (H×W×D) in (mm) 53.43 × 21 × 21 (1,357 × 533 × 533) 53.43 × 21 × 21 (1,357 × 533 × 533)

  • Page 60: Heat Pump

    Specifications SiUS281811EB Heat Pump 3.2.1 Ceiling Mounted Cassette Type (Round Flow with Sensing Panel) Model Indoor unit FCQ18TAVJU FCQ24TAVJU name Outdoor unit RZQ18TAVJU RZQ24TAVJU Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 4 Cooling capacity Btu/h 18,000 (5.3) 24,000 (7.0)
  • Page 61 SiUS281811EB Specifications Model Indoor unit FCQ30TAVJU FCQ36TAVJU name Outdoor unit RZQ30TAVJU RZQ36TAVJU Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 4 Cooling capacity Btu/h 30,000 (8.8) 36,000 (10.6) (kW) 2 4 Heating capacity Btu/h 34,000 (10.0) 40,000 (11.7)
  • Page 62 Specifications SiUS281811EB Model Indoor unit FCQ42TAVJU FCQ48TAVJU name Outdoor unit RZQ42TAVJU RZQ48TAVJU Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 4 Cooling capacity Btu/h 42,000 (12.3) 48,000 (14.1) (kW) 2 4 Heating capacity Btu/h 47,000 (13.8) 54,000 (15.8)
  • Page 63 SiUS281811EB Specifications Model Indoor unit FCQ18TAVJU FCQ24TAVJU name Outdoor unit RZQ18TAVJUA RZQ24TAVJUA Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 4 Cooling capacity Btu/h 18,000 (5.3) 24,000 (7.0) (kW) 2 4 Heating capacity Btu/h 20,000 (5.9) 27,000 (7.9)
  • Page 64 Specifications SiUS281811EB Model Indoor unit FCQ30TAVJU FCQ36TAVJU name Outdoor unit RZQ30TAVJUA RZQ36TAVJUA Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 4 Cooling capacity Btu/h 30,000 (8.8) 36,000 (10.6) (kW) 2 4 Heating capacity Btu/h 34,000 (10.0) 40,000 (11.7)
  • Page 65 SiUS281811EB Specifications Model Indoor unit FCQ42TAVJU FCQ48TAVJU name Outdoor unit RZQ42TAVJUA RZQ48TAVJUA Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 4 Cooling capacity Btu/h 42,000 (12.3) 48,000 (14.1) (kW) 2 4 Heating capacity Btu/h 47,000 (13.8) 54,000 (15.8)
  • Page 66 Specifications SiUS281811EB Model Indoor unit FCQ18AAVJU FCQ24AAVJU name Outdoor unit RZQ18TBVJUA RZQ24TBVJUA Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 4 Cooling capacity Btu/h 18,000 (5.3) 24,000 (7.0) (kW) 2 4 Heating capacity Btu/h 20,000 (5.9) 27,000 (7.9)
  • Page 67 SiUS281811EB Specifications Model Indoor unit FCQ30AAVJU FCQ36AAVJU name Outdoor unit RZQ30TBVJUA RZQ36TBVJUA Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 4 Cooling capacity Btu/h 30,000 (8.8) 36,000 (10.6) (kW) 2 4 Heating capacity Btu/h 34,000 (10.0) 40,000 (11.7)
  • Page 68 Specifications SiUS281811EB Model Indoor unit FCQ42AAVJU FCQ48AAVJU name Outdoor unit RZQ42TBVJUA RZQ48TBVJUA Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 4 Cooling capacity Btu/h 42,000 (12.3) 48,000 (14.1) (kW) 2 4 Heating capacity Btu/h 47,000 (13.8) 54,000 (15.8)
  • Page 69 SiUS281811EB Specifications 3.2.2 Ceiling Suspended Type Model Indoor unit FHQ18PVJU FHQ24PVJU name Outdoor unit RZQ18TAVJU RZQ24TAVJU Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 4 Cooling capacity Btu/h 18,000 (5.3) 24,000 (7.0) (kW) 2 4 Heating capacity Btu/h 20,000 (5.9)
  • Page 70 Specifications SiUS281811EB Model Indoor unit FHQ30PVJU FHQ36MVJU name Outdoor unit RZQ30TAVJU RZQ36TAVJU Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 4 Cooling capacity Btu/h 30,000 (8.8) 36,000 (10.6) (kW) 2 4 Heating capacity Btu/h 34,000 (10.0) 40,000 (11.7)
  • Page 71 SiUS281811EB Specifications Model Indoor unit FHQ42MVJU name Outdoor unit RZQ42TAVJU Power supply 1 phase, 208/230 V, 60 Hz 1 4 Cooling capacity Btu/h 40,500 (11.9) (kW) 2 4 Heating capacity Btu/h 40,000 (11.7) (kW) 3 4 Heating capacity Btu/h 23,400 (6.9) (kW) SEER (Rated) 14.0...
  • Page 72 Specifications SiUS281811EB Model Indoor unit FHQ18PVJU FHQ24PVJU name Outdoor unit RZQ18TAVJUA RZQ24TAVJUA Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 4 Cooling capacity Btu/h 18,000 (5.3) 24,000 (7.0) (kW) 2 4 Heating capacity Btu/h 20,000 (5.9) 27,000 (7.9)
  • Page 73 SiUS281811EB Specifications Model Indoor unit FHQ30PVJU FHQ36MVJU name Outdoor unit RZQ30TAVJUA RZQ36TAVJUA Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 4 Cooling capacity Btu/h 30,000 (8.8) 36,000 (10.6) (kW) 2 4 Heating capacity Btu/h 34,000 (10.0) 40,000 (11.7)
  • Page 74 Specifications SiUS281811EB Model Indoor unit FHQ42MVJU name Outdoor unit RZQ42TAVJUA Power supply 1 phase, 208/230 V, 60 Hz 1 4 Cooling capacity Btu/h 40,500 (11.9) (kW) 2 4 Heating capacity Btu/h 40,000 (11.7) (kW) 3 4 Heating capacity Btu/h 23,400 (6.9) (kW) SEER (Rated) 14.0...
  • Page 75 SiUS281811EB Specifications 3.2.3 Wall Mounted Type Model Indoor unit FAQ18TAVJU FAQ24TAVJU name Outdoor unit RZQ18TAVJU RZQ24TAVJU Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 4 Cooling capacity Btu/h 18,000 (5.3) 24,000 (7.0) (kW) 2 4 Heating capacity Btu/h 20,000 (5.9)
  • Page 76 Specifications SiUS281811EB Model Indoor unit FAQ18TAVJU FAQ24TAVJU name Outdoor unit RZQ18TAVJUA RZQ24TAVJUA Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 4 Cooling capacity Btu/h 18,000 (5.3) 24,000 (7.0) (kW) 2 4 Heating capacity Btu/h 20,000 (5.9) 27,000 (7.9)
  • Page 77 SiUS281811EB Specifications Model Indoor unit FAQ18TAVJU FAQ24TAVJU name Outdoor unit RZQ18TBVJUA RZQ24TBVJUA Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 4 Cooling capacity Btu/h 18,000 (5.3) 24,000 (7.0) (kW) 2 4 Heating capacity Btu/h 20,000 (5.9) 27,000 (7.9)
  • Page 78 Specifications SiUS281811EB 3.2.4 HSP Ceiling Mounted Duct Type Model Indoor unit FBQ18PVJU FBQ24PVJU name Outdoor unit RZQ18TAVJU RZQ24TAVJU Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 4 Cooling capacity Btu/h 18,000 (5.3) 24,000 (7.0) (kW) 2 4 Heating capacity Btu/h...
  • Page 79 SiUS281811EB Specifications Model Indoor unit FBQ30PVJU FBQ36PVJU name Outdoor unit RZQ30TAVJU RZQ36TAVJU Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 4 Cooling capacity Btu/h 30,000 (8.8) 36,000 (10.6) (kW) 2 4 Heating capacity Btu/h 34,000 (10.0) 40,000 (11.7)
  • Page 80 Specifications SiUS281811EB Model Indoor unit FBQ42PVJU FBQ48PVJU name Outdoor unit RZQ42TAVJU RZQ48TAVJU Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 4 Cooling capacity Btu/h 40,500 (11.9) 48,000 (14.1) (kW) 2 4 Heating capacity Btu/h 47,000 (13.8) 54,000 (15.8)
  • Page 81 SiUS281811EB Specifications Model Indoor unit FBQ18PVJU FBQ24PVJU name Outdoor unit RZQ18TAVJUA RZQ24TAVJUA Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 4 Cooling capacity Btu/h 18,000 (5.3) 24,000 (7.0) (kW) 2 4 Heating capacity Btu/h 20,000 (5.9) 27,000 (7.9)
  • Page 82 Specifications SiUS281811EB Model Indoor unit FBQ30PVJU FBQ36PVJU name Outdoor unit RZQ30TAVJUA RZQ36TAVJUA Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 4 Cooling capacity Btu/h 30,000 (8.8) 36,000 (10.6) (kW) 2 4 Heating capacity Btu/h 34,000 (10.0) 40,000 (11.7)
  • Page 83 SiUS281811EB Specifications Model Indoor unit FBQ42PVJU FBQ48PVJU name Outdoor unit RZQ42TAVJUA RZQ48TAVJUA Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 4 Cooling capacity Btu/h 40,500 (11.9) 48,000 (14.1) (kW) 2 4 Heating capacity Btu/h 47,000 (13.8) 54,000 (15.8)
  • Page 84 Specifications SiUS281811EB Model Indoor unit FBQ18TBVJU FBQ24TBVJU name Outdoor unit RZQ18TBVJUA RZQ24TBVJUA Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 4 Cooling capacity Btu/h 17,700 (5.2) 23,400 (6.9) (kW) 2 4 Heating capacity Btu/h 20,600 (6.0) 27,400 (8.0)
  • Page 85 SiUS281811EB Specifications Model Indoor unit FBQ30TBVJU FBQ36TBVJU name Outdoor unit RZQ30TBVJUA RZQ36TBVJUA Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 4 Cooling capacity Btu/h 28,400 (8.3) 35,000 (10.3) (kW) 2 4 Heating capacity Btu/h 34,800 (10.2) 40,000 (11.7)
  • Page 86 Specifications SiUS281811EB Model Indoor unit FBQ42TBVJU FBQ48TBVJU name Outdoor unit RZQ42TBVJUA RZQ48TBVJUA Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz 1 4 Cooling capacity Btu/h 40,000 (11.7) 46,500 (13.6) (kW) 2 4 Heating capacity Btu/h 47,000 (13.8) 54,000 (15.8)
  • Page 87 HSPF (Rated) Indoor unit FTQ18TAVJUD, FTQ18TAVJUA FTQ24TAVJUD, FTQ24TAVJUA Casing color Daikin Slate Gray Daikin Slate Gray Dimensions: (H×W×D) in (mm) 45 × 17.5 × 21 (1,143 × 445 × 533) 45 × 17.5 × 21 (1,143 × 445 × 533)
  • Page 88 HSPF (Rated) 10.4 Indoor unit FTQ30TAVJUD, FTQ30TAVJUA FTQ36TAVJUD, FTQ36TAVJUA Casing color Daikin Slate Gray Daikin Slate Gray Dimensions: (H×W×D) in (mm) 45 × 17.5 × 21 (1,143 × 445 × 533) 45 × 17.5 × 21 (1,143 × 445 × 533)
  • Page 89 HSPF (Rated) Indoor unit FTQ42TAVJUD, FTQ42TAVJUA FTQ48TAVJUD, FTQ48TAVJUA Casing color Daikin Slate Gray Daikin Slate Gray Dimensions: (H×W×D) in (mm) 53.43 × 21 × 21 (1,357 × 533 × 533) 53.43 × 21 × 21 (1,357 × 533 × 533)
  • Page 90 HSPF (Rated) Indoor unit FTQ18TAVJUD, FTQ18TAVJUA FTQ24TAVJUD, FTQ24TAVJUA Casing color Daikin Slate Gray Daikin Slate Gray Dimensions: (H×W×D) in (mm) 45 × 17.5 × 21 (1,143 × 445 × 533) 45 × 17.5 × 21 (1,143 × 445 × 533)
  • Page 91 HSPF (Rated) 10.4 Indoor unit FTQ30TAVJUD, FTQ30TAVJUA FTQ36TAVJUD, FTQ36TAVJUA Casing color Daikin Slate Gray Daikin Slate Gray Dimensions: (H×W×D) in (mm) 45 × 17.5 × 21 (1,143 × 445 × 533) 45 × 17.5 × 21 (1,143 × 445 × 533)
  • Page 92 HSPF (Rated) Indoor unit FTQ42TAVJUD, FTQ42TAVJUA FTQ48TAVJUD, FTQ48TAVJUA Casing color Daikin Slate Gray Daikin Slate Gray Dimensions: (H×W×D) in (mm) 53.43 × 21 × 21 (1,357 × 533 × 533) 53.43 × 21 × 21 (1,357 × 533 × 533)
  • Page 93 HSPF2 (Rated) Indoor unit FTQ18TAVJUD, FTQ18TAVJUA FTQ24TAVJUD, FTQ24TAVJUA Casing color Daikin Slate Gray Daikin Slate Gray Dimensions: (H×W×D) in (mm) 45 × 17.5 × 21 (1,143 × 445 × 533) 45 × 17.5 × 21 (1,143 × 445 × 533)
  • Page 94 HSPF2 (Rated) Indoor unit FTQ30TAVJUD, FTQ30TAVJUA FTQ36TAVJUD, FTQ36TAVJUA Casing color Daikin Slate Gray Daikin Slate Gray Dimensions: (H×W×D) in (mm) 45 × 17.5 × 21 (1,143 × 445 × 533) 45 × 17.5 × 21 (1,143 × 445 × 533)
  • Page 95 HSPF2 (Rated) Indoor unit FTQ42TAVJUD, FTQ42TAVJUA FTQ48TAVJUD, FTQ48TAVJUA Casing color Daikin Slate Gray Daikin Slate Gray Dimensions: (H×W×D) in (mm) 53.43 × 21 × 21 (1,357 × 533 × 533) 53.43 × 21 × 21 (1,357 × 533 × 533)

  • Page 96: Part 2 Refrigerant Circuit

    SiUS281811EB Part 2 Refrigerant Circuit 1. Refrigerant Circuit (Piping Diagrams) ............91 1.1 Outdoor Unit ....................91 1.2 Indoor Unit....................97 2. Functional Parts Layout ................99 2.1 RZR18/24TAVJU, RZQ18/24TAVJU............99 2.2 RZR18/24TAVJUA, RZQ18/24TAVJUA, RZR18/24TBVJUA, RZQ18/24TBVJUA ................... 101 2.3 RZR30-48TAVJU, RZQ30-48TAVJU ............103 2.4 RZR30-48TAVJUA, RZQ30-48TAVJUA, RZR30-48TBVJUA, RZQ30-48TBVJUA...................

  • Page 97: Refrigerant Circuit (Piping Diagrams)

    SiUS281811EB Refrigerant Circuit (Piping Diagrams) 1. Refrigerant Circuit (Piping Diagrams) Outdoor Unit 1.1.1 18/24 Class No. in Electric piping Name Function symbol diagram Compressor Compressor is operated in multi-steps according to Te and Tc. Fan motor The fan rotation speed is varied by using inverter. Electronic expansion valve While in heating operation, PI control is applied to keep the outlet superheated (Main)
  • Page 98 Refrigerant Circuit (Piping Diagrams) SiUS281811EB RZR18/24TAVJU, RZQ18/24TAVJU Part 2 Refrigerant Circuit...
  • Page 99 SiUS281811EB Refrigerant Circuit (Piping Diagrams) RZR18/24TAVJUA, RZQ18/24TAVJUA, RZR18/24TBVJUA, RZQ18/24TBVJUA Part 2 Refrigerant Circuit...
  • Page 100 Refrigerant Circuit (Piping Diagrams) SiUS281811EB 1.1.2 30-48 Class No. in Electric piping Name Function symbol diagram Compressor Compressor is operated in multi-steps according to Te and Tc. Fan motor The fan rotation speed is varied by using inverter. Electronic expansion valve While in heating operation, PI control is applied to keep the outlet superheated (Main) degree of air heat exchanger constant.
  • Page 101 SiUS281811EB Refrigerant Circuit (Piping Diagrams) RZR30/36/42/48TAVJU, RZQ30/36/42/48TAVJU Part 2 Refrigerant Circuit...
  • Page 102 Refrigerant Circuit (Piping Diagrams) SiUS281811EB RZR30/36/42/48TAVJUA, RZQ30/36/42/48TAVJUA, RZR30/36/42/48TBVJUA, RZQ30/36/42/48TBVJUA Part 2 Refrigerant Circuit...

  • Page 103: Indoor Unit

    SiUS281811EB Refrigerant Circuit (Piping Diagrams) Indoor Unit Symbol No. in Except piping Name Function FBQ-P FBQ-P FTQ-TA diagram FTQ-TA Electronic expansion Used for gas superheating degree control while in cooling valve or subcooling degree control while in heating. Suction air thermistor R1T (1) Used for thermostat control.
  • Page 104 Refrigerant Circuit (Piping Diagrams) SiUS281811EB  FBQ-TB  FTQ-TA C: 4D141716 C: 4D068194 Part 2 Refrigerant Circuit...

  • Page 105: Functional Parts Layout

    SiUS281811EB Functional Parts Layout 2. Functional Parts Layout RZR18/24TAVJU, RZQ18/24TAVJU Top view Low pressure sensor (S1NPL) High pressure sensor (S1NPH) Thermistor (Suction pipe 2) (R5T) Front view Solenoid valve coil (Hot gas) (Y2S) Four way valve coil (Y1S) Solenoid valve coil (Unload circuit) (Y3S) Fan motor...
  • Page 106 Functional Parts Layout SiUS281811EB Side view Four way valve (Y1S) Thermistor (Outdoor air) (R1T) Thermistor (Suction pipe 1) (R3T) Thermistor (Heat exchanger deicer) (R4T) C: 1P342997N Part 2 Refrigerant Circuit...

  • Page 107: Rzr18/24Tavjua, Rzq18/24Tavjua, Rzr18/24Tbvjua, Rzq18/24Tbvjua

    SiUS281811EB Functional Parts Layout RZR18/24TAVJUA, RZQ18/24TAVJUA, RZR18/24TBVJUA, RZQ18/24TBVJUA Top view Low pressure sensor (S1NPL) High pressure sensor (S1NPH) Thermistor (Suction pipe 2) (R5T) Front view Solenoid valve coil (Hot gas) (Y2S) Four way valve coil (Y1S) Solenoid valve coil (Unload circuit) (Y3S) Fan motor (M1F)
  • Page 108 Functional Parts Layout SiUS281811EB Side view Four way valve (Y1S) Thermistor (Outdoor air) (R1T) Thermistor (Suction pipe 1) (R3T) Thermistor (Heat exchanger deicer) (R4T) C: 1P589934F Part 2 Refrigerant Circuit...

  • Page 109: Rzr30-48Tavju, Rzq30-48Tavju

    SiUS281811EB Functional Parts Layout RZR30-48TAVJU, RZQ30-48TAVJU Front view Fan motor (M1F) Four way valve coil (Y1S) Thermistor (Suction pipe 2) (R5T) Thermistor (Discharge pipe) (R2T) Fan motor Low pressure sensor (M2F) (S1NPL) High pressure sensor (S1NPH) High pressure switch (S1PH) Compressor (M1C) Crankcase heater...
  • Page 110 Functional Parts Layout SiUS281811EB Side view Thermistor (Subcooling heat exchanger gas pipe) (R6T) Thermistor (Suction pipe 1) (R3T) Thermistor (Outdoor air) (R1T) Electronic expansion valve/coil (Main) (Y1E) Electronic expansion valve/coil (Subcooling) (Y3E) Thermistor (Liquid pipe) (R7T) Thermistor (Heat exchanger deicer) (R4T) C: 1P441643P Part 2 Refrigerant Circuit...

  • Page 111: Rzr30-48Tavjua, Rzq30-48Tavjua, Rzr30-48Tbvjua, Rzq30-48Tbvjua

    SiUS281811EB Functional Parts Layout RZR30-48TAVJUA, RZQ30-48TAVJUA, RZR30-48TBVJUA, RZQ30-48TBVJUA Front view Fan motor (M1F) Four way valve coil (Y1S) Thermistor (Suction pipe 2) (R5T) Thermistor (Discharge pipe) (R2T) Fan motor Low pressure sensor (M2F) (S1NPL) High pressure sensor (S1NPH) High pressure switch (S1PH) Compressor (M1C)
  • Page 112 Functional Parts Layout SiUS281811EB Side view Thermistor (Subcooling heat exchanger gas pipe) (R6T) Thermistor (Suction pipe 1) (R3T) Thermistor (Outdoor air) (R1T) Electronic expansion valve/coil (Main) (Y1E) Electronic expansion valve/coil (Subcooling) (Y3E) Thermistor (Liquid pipe) (R7T) Thermistor (Heat exchanger deicer) (R4T) C: 1P589937E Part 2 Refrigerant Circuit...

  • Page 113: Part 3 Remote Controller

    SiUS281811EB Part 3 Remote Controller 1. Applicable Models ...................108 2. Names and Functions ................109 2.1 BRC1E73 ....................109 2.2 BRC1H71W....................112 2.3 Simplified Remote Controller..............120 2.4 Wireless Remote Controller ..............121 3. Main/Sub Setting..................123 3.1 Wired Remote Controller (BRC1E73) ............123 3.2 Wired Remote Controller (BRC1H71W)...........

  • Page 114: Applicable Models

    Applicable Models SiUS281811EB 1. Applicable Models Wired remote controller Simplified remote Wireless remote Indoor unit controller controller Navigation Madoka Ceiling mounted cassette type FCQ-TA — (round flow with sensing panel) FCQ-AA — Ceiling suspended type FHQ-P BRC7E83 FHQ-M Wall mounted type FAQ-TA BRC1E73 BRC1H71W...

  • Page 115: Names And Functions

    SiUS281811EB Names and Functions 2. Names and Functions BRC1E73 1. Operation mode selector button 11. LCD (with backlight) 4. Up button 5. Down button 6. Right button 7. Left button 9. Operation lamp 8. On/Off button 3. Menu/OK button 10. Cancel button 2.
  • Page 116 Names and Functions SiUS281811EB 4. Up button Used to raise the setpoint. The item above the current selection will be highlighted. (The highlighted items will be scrolled continuously when the button is continuously pressed.) Used to change the selected item. 5.
  • Page 117 SiUS281811EB Names and Functions Service Check Function <Main Menu> Main Menu • Airflow Direction Airflow Direction • Individual Airflow Direction Individual Airflow Direction • Ventilation Ventilation • Schedule Schedule • Off Timer Off Timer • Celsius / Fahrenheit Celsius / Fahrenheit •...

  • Page 118: Brc1H71W

    Names and Functions SiUS281811EB BRC1H71W 2.2.1 Button Locations and Descriptions ON/OFF button • Press this button to turn on the system. • Press this button again to turn off the system. b Status indicator (LED) • During operation, the light ring around the display lights up blue/red/green. Lights up blue: Operating, Blinks red: Error is occurring, Lights up/blinks green: Bluetooth connecting c LCD •...

  • Page 119: Overview Of Screens

    SiUS281811EB Names and Functions 2.2.2 Overview of Screens The following is just an example. The items available for setting vary depending on the indoor unit you are using. If there is no button operation for about 10 seconds, the screen returns to the home screen.
  • Page 120 Names and Functions SiUS281811EB 2.2.3 Setting Screen List Setting list Installer User Administrator menu menu menu Icon Name Description Depends on Operation Mode Operation mode setting current setting Depends on Fan Speed Airflow rate setting current setting Depends on Airflow Direction Airflow direction 1 setting current setting Depends on...
  • Page 121 SiUS281811EB Names and Functions Setting list Installer User Administrator menu menu menu Icon Name Description Bluetooth Setting Bluetooth setting Backlight Backlight brightness setting Contrast Contrast setting Clock Setting Clock setting Scale reference temperature Standard Temp setting About Administrator information Administrator password Admin Password setting Installer Password...
  • Page 122 Bluetooth SIG, Inc. and use of such marks by r Settings menu name Daikin industries, LTD. is under license. Other trademarks and trade names are those of their respective owners. s Settings menu icon INFORMATION Depending on the connected model, some items may not be displayed.
  • Page 123 SiUS281811EB Names and Functions Home screen list There are 4 types of home screen. The home screen type can be changed by the remote controller setting. Text mode Icon mode Auto Cool ˚F Room Text mode (Scale screen) Icon mode (Scale screen) Auto Cool Cool Warm...

  • Page 124: Information Screen

    Names and Functions SiUS281811EB 2.2.5 Information Screen The functions of the connected indoor unit are displayed as icons. How to display the information screen Home screen Press and hold on the Home screen for 5 Auto Cool ˚F seconds. Room Text mode Icon mode Information screen...
  • Page 125 * The Bluetooth® word mark and logos are registered trademarks owned by the Bluetooth SIG, Inc. and use of such marks by Daikin industries, LTD. is under license. Other trademarks and trade names are those of their respective owners.

  • Page 126: Simplified Remote Controller

    Names and Functions SiUS281811EB Simplified Remote Controller BRC2A71 ON/OFF BUTTON DISPLAY “ ” (UNDER CENTRALIZED CONTROL) Press the button and the system will start. Press the button again and the system will stop. When this display shows, the system is UNDER CENTRALIZED CONTROL.

  • Page 127: Wireless Remote Controller

    SiUS281811EB Names and Functions Wireless Remote Controller ON OFF ON OFF TEMP TIME DOWN DOWN RESERVE CANCEL TIMER MODE SWING TEST TEST TEST Receiver 22 23 19 21 20 FBQ (separate type) Part 3 Remote Controller...
  • Page 128 Names and Functions SiUS281811EB PROGRAMMING TIMER BUTTON DISPLAY “ ” “ I ” (SIGNAL TRANSMISSION) Use this button for programming “START and/or STOP” This lights up when a signal is being transmitted. time. (Operates with the front cover of the remote con- DISPLAY “...

  • Page 129: Main/Sub Setting

    SiUS281811EB Main/Sub Setting 3. Main/Sub Setting Main/Sub setting is necessary when 1 indoor unit is controlled by 2 remote controllers. The remote controllers are set at factory to Main, so you have to change one remote controller from Main to Sub.

  • Page 130: Wired Remote Controller (Brc1H71W)

    Main/Sub Setting SiUS281811EB Note(s) 1. It is not possible to change the Main/Sub setting from Main to Sub when only one remote controller is connected. 2. When 2 remote controllers are being used, it is not possible to change the setting from Main to Sub if one of the remote controllers is already set as Main.
  • Page 131 SiUS281811EB Main/Sub Setting 3.2.2 Designating a Controller as Main or Sub Prerequisite: A remote controller is already connected to the indoor unit. Connect a second controller. After turning on the power, perform setting of the second controller. Result: It will start up automatically. Home screen Wait for a U5 or U8 error code to appear on the screen.

  • Page 132: When Wireless Remote Controller Is Used Together

    Main/Sub Setting SiUS281811EB When Wireless Remote Controller is Used Together When using both a wired and a wireless remote controller for 1 indoor unit, the wired controller should be set to Main. Therefore, the Main/Sub switch (SS1) of the signal receiver PCB must be set to Sub.

  • Page 133: Address Setting For Wireless Remote Controller

    SiUS281811EB Address Setting for Wireless Remote Controller 4. Address Setting for Wireless Remote Controller If setting multiple wireless remote controllers to operate in one room, perform address setting for the receiver and the wireless remote controller. (This includes an individual remote controller control using the group operation.) (For the wiring for the group operation, please refer to the installation manual attached to the indoor unit and technical guide.) Setting for Signal Receiver PCB...
  • Page 134 Address Setting for Wireless Remote Controller SiUS281811EB Setting for Wireless Remote Controller The address for the wireless remote controller is set to 1 at the factory. To change the setting, proceed as follows: 1. Press FILTER SIGN RESET button and INSPECTION/TEST button at the same time for 4 seconds to enter field setting mode.
  • Page 135 SiUS281811EB Address Setting for Wireless Remote Controller Multiple Settings A/b The command such as operation mode or temperature setting by this remote controller will be rejected when the target indoor unit operation is restricted as by an external control such as centralized control.

  • Page 136: Centralized Control Group No. Setting

    Centralized Control Group No. Setting SiUS281811EB 5. Centralized Control Group No. Setting BRC1E73 In order to conduct the centralized 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 137 SiUS281811EB Centralized Control Group No. Setting Note(s)  For setting group No. of Energy recovery ventilator and wiring adaptor for other air conditioners, etc., refer to the instruction manual. NOTICE Enter the group No. and installation place of the indoor unit into the installation table. Be sure to keep the installation table with the operation manual for maintenance.

  • Page 138: Brc1H71W

    Centralized Control Group No. Setting SiUS281811EB BRC1H71W Group Address • Assign the group address and unit number for centralized control. • The group and unit address can only be set when a centralized controller is connected. This menu is only visible when a centralized controller is connected. •...

  • Page 139: Wireless Remote Controller

    SiUS281811EB Centralized Control Group No. Setting Wireless Remote Controller Group No. setting by wireless remote controller for centralized control 1. When in the normal mode, press INSPECTION/TEST button for 4 seconds or more to enter field setting mode. 2. Set mode No. 00 with MODE button. 3.

  • Page 140: Service Settings Menu, Maintenance Menu

    Service Settings Menu, Maintenance Menu SiUS281811EB 6. Service Settings Menu, Maintenance Menu BRC1E73 Operating the remote controller allows service data to be acquired and various services to be set. Basic screen is displayed. Press and hold the Press the Cancel Cancel button button once.

  • Page 141: Service Settings Menu

    SiUS281811EB Service Settings Menu, Maintenance Menu 6.1.1 Service Settings Menu Service settings menu Item 2 Item 3 Test Operation — — Maintenance Contact None — Maintenance Contact —, 0 to 9 (in order) Field Settings Indoor Unit No. — Mode No. —...

  • Page 142: Maintenance Menu

    Service Settings Menu, Maintenance Menu SiUS281811EB 6.1.2 Maintenance Menu Maintenance Menu Item 2 Remarks Model Name Unit No. Select the unit number you want to check. Indoor unit The model names are displayed. (A model code may be displayed instead, depending on the particular Outdoor unit model.) Operation Hours...
  • Page 143 SiUS281811EB Service Settings Menu, Maintenance Menu Maintenance Menu Item 2 Remarks Error Display Display error ON Displays the error on the screen. Display error OFF Displays neither errors nor warnings. Display warning ON Displays a warning on the screen if an error occurs. Display warning OFF No warning is displayed.

  • Page 144: Wireless Remote Controller

    Service Settings Menu, Maintenance Menu SiUS281811EB Wireless Remote Controller 6.2.1 Service Setting Mode number UP button DOWN button RESERVE button MODE button INSPECTION/TEST button 1. Press INSPECTION/TEST button for 4 seconds during normal mode to enter field setting mode. 2. Press INSPECTION/TEST button for 4 seconds to enter service mode. 3.

  • Page 145: Administrator Menu, Installer Menu

    SiUS281811EB Administrator Menu, Installer Menu 7. Administrator Menu, Installer Menu BRC1H71W Refer to page 114 for details. Part 3 Remote Controller...

  • Page 146: Part 4 Functions And Control

    SiUS281811EB Part 4 Functions and Control 1. Operation Mode ..................141 2. Basic Control...................142 2.1 Normal Operation ..................142 2.2 Compressor PI Control................143 2.3 Electronic Expansion Valve PI Control............. 145 2.4 Cooling Operation Fan Control..............145 3. Special Control..................146 3.1 Startup Control ..................146 3.2 Oil Return Control..................

  • Page 147: Operation Mode

    SiUS281811EB Operation Mode 1. Operation Mode Operation in stop control Indoor unit stop or Indoor unit thermostat ON thermostat OFF Error/Standby Restart standby Pressure (Compressor stop) equalization prior to startup Error/ Standby Indoor unit stop or thermostat OFF Startup control •...

  • Page 148: Basic Control

    Basic Control SiUS281811EB 2. Basic Control Normal Operation Cooling Operation Electric Symbol Outdoor unit actuator Operation Remarks 18/24 class 30-48 class Compressor Compressor Used for high pressure protection control, PI control low pressure protection control, discharge pipe temperature protection control, and compressor operating frequency upper limit control with inverter protection control.

  • Page 149: Compressor Pi Control

    SiUS281811EB Basic Control Compressor PI Control Carries out compressor capacity PI control to maintain Te at constant during cooling operation and Tc at constant during heating operation, thus ensuring stable unit performance. Te: Low pressure equivalent saturation temperature TeS: Target Te value (varies depending on Te setting, operating frequency, etc.) Tc: High pressure equivalent saturation temperature TcS: Target Tc value (varies depending on Tc setting, operating frequency, etc.) Cooling...
  • Page 150 Basic Control SiUS281811EB 18/24 class 30-48 class Step Frequency (Hz) Step Frequency (Hz) 52.5 52.5 61.5 61.5 67.5 85.5 100.5 112.5 118.5 115.5 121.5 128.1 145.5 163.5 154.5 163.5 181.5 178.5 196.5 211.5 223.5 232.5 244.5 253.5 253.5 265.5 277.5 289.5 301.5 Part 4 Functions and Control...

  • Page 151: Electronic Expansion Valve Pi Control

    SiUS281811EB Basic Control Electronic Expansion Valve PI Control Main Electronic Expansion Valve Control Carries out main electronic expansion valve (Y1E) PI control to maintain the evaporator outlet superheating degree (SH) at constant during heating operation, thus making maximum use of the outdoor heat exchanger (evaporator).

  • Page 152: Special Control

    Special Control SiUS281811EB 3. Special Control Startup Control This control is used to equalize the pressure in the suction and discharge sides of the compressor prior to compressor startup, thus reducing startup loads. Furthermore, the inverter is turned ON to charge the capacitor.

  • Page 153: Startup Control In Heating

    SiUS281811EB Special Control 3.1.2 Startup Control in Heating Electric Symbol Startup control Outdoor unit Pressure equalization actuator control prior to startup 18/24 class 30-48 class STEP 1 STEP 2 Compressor 0 Hz Minimum frequency Increases 2 steps every 20 seconds from minimum frequency until Pc –...

  • Page 154: Oil Return Control

    Special Control SiUS281811EB Oil Return Control In order to prevent the compressor from running out of oil, oil return control is conducted to recover oil that has flowed out from the compressor to the system side. HTdi: Compressor discharge pipe temperature (Tdi) compensated with outdoor air temperature Pe: Low pressure sensor detection value Tc: High pressure equivalent saturation temperature Te: Low pressure equivalent saturation temperature...
  • Page 155 SiUS281811EB Special Control 3.2.2 Oil Return Control in Heating Pc: High pressure sensor detection value Pe: Low pressure sensor detection value Tc: High pressure equivalent saturation temperature Te: Low pressure equivalent saturation temperature Ts1: Suction pipe temperature detected by thermistor R3T Tb: Heat exchanger temperature Starting ...

  • Page 156: Defrost Control

    Special Control SiUS281811EB Defrost Control Pc: High pressure sensor detection value Pe: Low pressure sensor detection value Tb: Heat exchanger deicer temperature Tc: High pressure equivalent saturation temperature Te: Low pressure equivalent saturation temperature Ts1: Suction pipe temperature detected by thermistor R3T Defrost control is performed to melt frost on the outdoor heat exchanger when heating, and thus recover heating capacity.

  • Page 157: Pump Down Residual Control

    SiUS281811EB Special Control Pump Down Residual Control If liquid refrigerant is retained in the evaporator when the compressor is activated, the liquid refrigerant enters the compressor and dilutes oil therein resulting in a decrease of lubricity. Therefore, pump down residual control is performed to collect the refrigerant retained in the evaporator when the compressor stops.

  • Page 158: Restart Standby

    Special Control SiUS281811EB Restart Standby Restart is forced into standby to prevent the power from frequently turning on and off and to equalize pressure in the refrigerant system. Ta: Outdoor air temperature Electric Symbol Outdoor unit Operation actuator 18/24 class 30-48 class Compressor Outdoor fan...

  • Page 159: Protection Control

    SiUS281811EB Protection Control 4. Protection Control High Pressure Protection Control This high pressure protection control is used to prevent the activation of protection devices due to an abnormal increase of high pressure and to protect compressors against the transient increase of high pressure.

  • Page 160: Low Pressure Protection Control

    Protection Control SiUS281811EB Low Pressure Protection Control This low pressure protection control is used to protect compressors against the transient decrease of low pressure. Pe: Low pressure sensor detection value Cooling Operation Low pressure not limited Pe < 0.25 MPa Pe >...

  • Page 161: Discharge Pipe Temperature Protection Control

    SiUS281811EB Protection Control Discharge Pipe Temperature Protection Control This discharge pipe temperature protection control is used to protect the compressor internal temperature against an error or transient increase of discharge pipe temperature. HTdi: Value of inverter compressor discharge pipe temperature (Tdi) compensated with outdoor air temperature Tp: Value of compressor port temperature calculated by Tc, Te, and suction superheating degree.

  • Page 162: Inverter Protection Control

    Protection Control SiUS281811EB Inverter Protection Control Inverter current protection control and radiation fin temperature control are performed to prevent tripping due to an error, or transient inverter overcurrent, and radiation fin temperature increase. Tfin: Radiation fin temperature Inverter overcurrent protection control Not limited Inverter current ≤...
  • Page 163 SiUS281811EB Protection Control According to the current limit of direct current Not limited Compressor stopped Existing DC power limit No DC power limit requirement. • requirement. Compressor upper limit : Maximum frequency • Limited Inverter upper limit frequency: 1-step down from current compressor frequency Existing DC power 10 seconds...

  • Page 164: Other Control

    Other Control SiUS281811EB 5. Other Control Demand Operation In order to reduce power consumption, the outdoor unit capacity is reduced forcibly with control by using Demand Setting 1. To enable this operation, the additional setting of Constant Demand Setting is required. Demand setting 1 Level Standard for upper limit of power consumption...

  • Page 165: Outline Of Control (Indoor Unit)

    SiUS281811EB Outline of Control (Indoor Unit) 6. Outline of Control (Indoor Unit) Remote Controller Thermistor Temperature is controlled by both the remote controller thermistor and suction air thermistor (1) for the indoor unit. (This is however limited to when the field setting for the remote controller thermistor is set to Use.) Note(s) When fresh air intake kit is used, outdoor air is mixed with indoor air, and the room temperature...
  • Page 166 Outline of Control (Indoor Unit) SiUS281811EB  Assuming suction temperature has changed from 30°C (86°F) to 18°C (64°F) (F A): Suction air thermistor (1) is used for temperatures from 30C (86F) to 25C (77F) (F  D). Remote controller thermistor is used for temperatures from 25C (77F) to 21C (70F) (D B). Suction air thermistor (1) is used for temperatures from 21C (70F) to 18C (64F) (B...

  • Page 167: Thermostat Control

    SiUS281811EB Outline of Control (Indoor Unit) Note(s) 1. For FTQ: Remote sensor (Optional accessory) Thermostat Control The thermostat ON/OFF differential value (factory setting) differs depending on the models. Differential value Model 1.0°C (1.8°F) FCQ-TA, FHQ-P, FHQ-M, FTQ-TA 0.5°C (0.9°F) FCQ-AA, FAQ-TA, FBQ-P, FBQ-TB 6.2.1 Without Infrared Floor Sensor Whether the thermostat is turned ON or OFF is determined by the difference between the remote controller set temperature and the actual detected room temperature (1).
  • Page 168 Outline of Control (Indoor Unit) SiUS281811EB 6.2.2 With Infrared Floor Sensor Whether the thermostat is turned ON or OFF is determined by the difference between the remote controller set temperature and the detected temperature around people. • Normal operation · Cooling operation ΔT ≤...

  • Page 169: Thermostat Control With Operation Mode Set To Auto

    SiUS281811EB Outline of Control (Indoor Unit) Thermostat Control with Operation Mode Set to AUTO The system will conduct this temperature control shown below, only when the wireless remote controller or any central remote controller is connected. Furthermore, setting changes of the differential value (D) can be made. : Factory setting Second code No.

  • Page 170: List Of Swing Flap Operations

    Outline of Control (Indoor Unit) SiUS281811EB List of Swing Flap Operations Swing flaps operate as shown in table below. Flap Operation mode Hot start from defrost operation Swing Horizontal Horizontal Horizontal Airflow direction set Horizontal Horizontal Horizontal Defrost operation Swing Horizontal Horizontal Horizontal...

  • Page 171: Hot Start Control (In Heating Operation Only)

    SiUS281811EB 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 fan is controlled to prevent cold air from blasting out and ensure startup capacity. TH2 : Temperature detected with the gas thermistor Tc : High pressure equivalent saturated temperature Starting condition...

  • Page 172: Louver Control For Preventing Ceiling Dirt (Fcq Models Only)

    Outline of Control (Indoor Unit) SiUS281811EB Louver Control for Preventing Ceiling Dirt (FCQ Models Only) 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 173: Drain Pump Control

    SiUS281811EB Outline of Control (Indoor Unit) Drain Pump Control 6.7.1 Normal Operation Float switch Thermostat (running) Error display Drain pump 5 min.  The float switch is ON in normal operation.  When cooling operation starts (thermostat ON), the drain pump turns ON simultaneously. ...
  • Page 174 Outline of Control (Indoor Unit) SiUS281811EB 6.7.3 If the Float Switch is OFF with the Thermostat OFF in Cooling Operation Float switch Thermostat (running) Error display Drain pump 5 min. 5 sec.  When the float switch turns OFF, the drain pump turns ON simultaneously. ...

  • Page 175: Freeze-Up Prevention

    SiUS281811EB Outline of Control (Indoor Unit) Freeze-Up Prevention Freeze-Up Prevention by Off Cycle (Indoor Unit Individual Control) When the temperature detected by the liquid pipe temperature thermistor of the indoor heat exchanger drops too low, the unit enters freeze-up prevention control in accordance with the following conditions, and is also set in accordance with the conditions given below.
  • Page 176 Outline of Control (Indoor Unit) SiUS281811EB Note(s) When the indoor unit is FCQ, if the air outlet is set as dual-directional or tri-directional, the starting conditions will be changed as follows. Liquid pipe temperature ≤ 1°C (33.8°F) (for total of 15 minutes) Liquid pipe temperature ≤...

  • Page 177: Heater Control (Except Ftq-Ta Models)

    SiUS281811EB Outline of Control (Indoor Unit) Heater Control (Except FTQ-TA Models) Note(s) Optional PCB KRP1B... is required for heater control. Heater control is conducted in the following manner. Normal control While in heating operation, heater control (ON/OFF) is conducted as shown on the right. 2ºC 2ºC (3.6˚F)

  • Page 178: Heater Control (Ftq-Ta Models)

    Outline of Control (Indoor Unit) SiUS281811EB 6.10 Heater Control (FTQ-TA Models) Note(s) Optional heater kit HKS... is required. For FTQ-TA models, heater ON/OFF output from wiring adaptor interlocks with the operation of heater kit HKS….(When the heater 1 turns ON/OFF, heater output of wiring adaptor turns ON/OFF.) Fan residual operation also interlocks with the fan residual operation of heater kit HKS….
  • Page 179 SiUS281811EB Outline of Control (Indoor Unit) Condition A • No fan motor system error • High pressure condition: ON (∗1) • Liquid pipe temperature condition: ON (∗2) • Heater ON permission (Defrost/oil Return): 0 (∗4) & & • Not during defrost/oil return •...
  • Page 180 Outline of Control (Indoor Unit) SiUS281811EB 6.10.2 Heat Pump Lockout Control For heating operation, users can select to use electric heater. For this, signals are sent using ABC terminal of outdoor unit PCB. When the hot-water heating signal is received from the outdoor unit PCB, heating operation is performed only with the electric heater as manual backup operation.

  • Page 181: 3-Step Thermostat Processing (Ftq-Ta Models)

    SiUS281811EB Outline of Control (Indoor Unit) 6.11 3-Step Thermostat Processing (FTQ-TA Models) Outline The thermostat ON/OFF for the indoor unit is controlled in accordance with Thermostat step 1. The heater ON/OFF operation during heating is controlled as follows. Thermostat step 2, 3: Auxiliary electric heater control Thermostat step 1, 2: Heat pump lockout control For more details of the heater, refer to Heater Control (FTQ-TA Models) on page 172.

  • Page 182: Fan Control (Heater Residual) (Ftq-Ta Models)

    Outline of Control (Indoor Unit) SiUS281811EB 6.12 Fan Control (Heater Residual) (FTQ-TA Models) Outline If the indoor heater turned OFF from ON during heating operation, the fan will keep operating for further period of time in order to cool the heater. Detail Residual ON •...
  • Page 183 SiUS281811EB Outline of Control (Indoor Unit) 6.13.3 Economizer When indoor and outdoor air temperatures are reversed, the compressor is stopped to let in the outdoor air to save energy. This operation is called economizer operation, and the equipment to detect indoor and outdoor air temperatures and open and close the damper to perform this operation is called an economizer.
  • Page 184 SiUS281811EB Part 5 Field Settings and Test Operation 1. Field Setting from Remote Controller............179 1.1 Wired Remote Controller................179 1.2 Simplified Remote Controller..............184 1.3 Wireless Remote Controller ..............185 1.4 List of Field Settings for Indoor Unit ............186 1.5 Details of Field Settings for Indoor Unit............

  • Page 185: Field Setting From Remote Controller

    SiUS281811EB Field Setting from Remote Controller 1. 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 field setting in accordance with the following description.
  • Page 186 Field Setting from Remote Controller SiUS281811EB 6. Press Menu/OK button. Setting confirmation screen is displayed. <Setting confirmation screen> 7. Select Yes and press Menu/OK button. Setting details are determined and field settings screen returns. 8. In the case of multiple setting changes, repeat (3) to (7).
  • Page 187 SiUS281811EB Field Setting from Remote Controller 1.1.2 BRC1H71W Enter the Installer Menu and make settings. Installer menu screen Press button, for move to “ ”. Field Setting If Bluetooth is connected, performing field setting from the remote controller side is impossible.
  • Page 188 Field Setting from Remote Controller SiUS281811EB Sub-menu screen Press button, scroll to the desired Unit Mode 20 Mode 20 No. and then press button to set the Unit 00 Unit 00 selection. Enter Return Text mode Icon mode Sub-menu screen Press button, to select “Enter”...
  • Page 189 SiUS281811EB Field Setting from Remote Controller Sub-menu screen Press button, to scroll to the desired SW 00 SW 00 Second Code No., and then press button. – 01 – 01 Cancel Text mode Icon mode Sub-menu screen Press button, select “Set” or “ ”, and SW 00 SW 00...

  • Page 190: Simplified Remote Controller

    Field Setting from Remote Controller SiUS281811EB Simplified Remote Controller Mode No. First code Unit No. Second code No. (2)(8) (7) 1. Remove the upper part of remote controller. 2. When in the normal mode, press the BS6 button (2) (field setting) to enter the field setting mode.

  • Page 191: Wireless Remote Controller

    SiUS281811EB Field Setting from Remote Controller Wireless Remote Controller UP button Mode No. Field setting mode DOWN button RESERVE button First code No. MODE button Second code No. INSPECTION/TEST button Setting To set the field settings, you have to change: ...

  • Page 192: List Of Field Settings For Indoor Unit

    Field Setting from Remote Controller SiUS281811EB List of Field Settings for Indoor Unit : Factory setting Mode First Second Code No. Reference Code Description Page (2) Filter Ultra long life filter Approx. Approx. cleaning 10,000 5,000 hrs. sign interval hrs. Long life filter Approx.
  • Page 193 SiUS281811EB Field Setting from Remote Controller Mode First Second Code No. Reference Code Description Page (2) Optional accessories output Refer to the page on the right for details. selection External ON/OFF input Refer to the page on the right for details. Thermostat differential 1°C (1.8°F) 0.5°C (0.9°F)
  • Page 194 Field Setting from Remote Controller SiUS281811EB 7. If the airflow setting when thermostat is OFF is set to OFF (12 (22)-3-03, 12 (22)-6-03), the air in the indoor unit will be stagnant and suction air thermistor may not detect room temperature correctly, resulting in problems that thermostat will not be ON easily.
  • Page 195 SiUS281811EB Field Setting from Remote Controller Applicable Range of Field Settings First Mode Code Description of Setting Filter cleaning sign interval       ― Filter sign setting ― ― ― ― ― ―  Filter type ...

  • Page 196: Details Of Field Settings For Indoor Unit

    Field Setting from Remote Controller SiUS281811EB Details of Field Settings for Indoor Unit 1.5.1 Filter Cleaning Sign Interval, Filter Type When the setting 10 (20)-3 is set to 01 (Displayed), filter cleaning sign is displayed on the remote controller after a certain period of operation time. This setting is used to change the display interval of filter cleaning sign when the filter contamination is heavy.
  • Page 197 SiUS281811EB Field Setting from Remote Controller (°F) (°C) 96.8 93.2 In cooling 89.6 Suction air Remote controller Suction air thermistor thermistor thermistor Suction air Remote controller Suction air 82.4 thermistor thermistor thermistor 78.8 75.2 71.6 (°C) 62.6 66.2 69.8 73.4 80.6 84.2 87.8 91.4 98.6 (°F)
  • Page 198 Field Setting from Remote Controller SiUS281811EB : Factory setting Mode No. First Code No. Second Code No. Contents Remote controller thermistor control is not 01 permitted during group control 10 (20) Remote controller thermistor control is permitted during group control Note(s) When the 10 (20)-6 setting is changed to 02, several indoor units are controlled by one remote controller thermistor, so note that the room temperature might be uneven.
  • Page 199 SiUS281811EB Field Setting from Remote Controller 1.5.5 Auxiliary Electric Heater ON/OFF Temperature Thermostat Set temperature Thermostat Toff + S(∗1) Ton + S (∗1) Note(s) 1. S value varies automatically based on the room temperature trend.  FCQ-TA : Factory setting First Second Code No.
  • Page 200 Field Setting from Remote Controller SiUS281811EB 1.5.7 Electric Heater Setting  FTQ-TA : Factory setting Contents Second Code Mode No. First Code No. Electric heater run for Heater operation defrost/oil return operation Electric heater with heat 01 Not allowed pump not allowed Electric heater with heat Not allowed pump allowed...

  • Page 201: Setting Procedure

    SiUS281811EB Field Setting from Remote Controller 1.5.10 Automatic Airflow Adjustment Make external static pressure setting automatically using automatic airflow adjustment, or manually using external static pressure settings. The volume of blow-off air is automatically adjusted to the rated quantity. Make settings before performing the test operation of the outdoor unit. Setting procedure 1.
  • Page 202 Field Setting from Remote Controller SiUS281811EB 1.5.11 Compensating the Temperature around People (For units with an infrared floor sensor) Change the ratio between the suction air temperature and floor temperature used to calculate the temperature around people. The temperature around people is calculated using the values of the suction air thermistor and the infrared floor sensor.

  • Page 203: External On/Off Input

    SiUS281811EB Field Setting from Remote Controller 1.5.14 Optional Accessories Output Selection Using this setting, "operation output signal" and "abnormal output signal" can be provided. Output signal is output between terminals X1 and X2 of "adaptor for wiring", an optional accessory. : Factory setting Mode First Code...

  • Page 204: Auto Restart After Power Failure

    Field Setting from Remote Controller SiUS281811EB 1.5.17 Airflow Setting when Heating Thermostat is OFF This setting is used to set airflow when heating thermostat is OFF.  When thermostat OFF airflow volume up mode is used, careful consideration is required before deciding installation location.

  • Page 205: Airflow Direction Setting

    SiUS281811EB Field Setting from Remote Controller 1.5.21 Ceiling Height Setting, Setting of Normal Airflow Make the following setting according to the ceiling height. The second code No. is set to 01 at the factory.  FCQ18/24TA, FCQ18/24AA : Factory setting Ceiling Height First Mode...
  • Page 206 Field Setting from Remote Controller SiUS281811EB 1.5.23 Swing Pattern Settings (For units with an infrared floor sensor) Set the flap operation in swing mode. With the factory swing, flaps facing each other are synchronized to operate, and flaps placed side by side are set to swing in an opposite direction to agitate airflow to reduce temperature irregularity.
  • Page 207 SiUS281811EB Field Setting from Remote Controller 1.5.26 Optional Kit Setting (UV lamp + Humidifier + Economizer)  FTQ-TA : Factory setting Contents Second Code Economizer setting for Mode No. First Code No. UV lamp + humidifier fan Mech standby duration speed (minutes) Refer to controller...

  • Page 208: Room Temperature Display

    Field Setting from Remote Controller SiUS281811EB 1.5.30 Direct Duct Connection This is used when "fresh air intake kit equipped with fan" is connected. The indoor unit fan carries out residual operation for 1 minute after the thermostat is stopped. (For the purpose of preventing dust on the air filter from falling off.) : Factory setting Mode No.
  • Page 209 SiUS281811EB Field Setting from Remote Controller 1.5.35 Thermistor Sensor for Auto Changeover and Setback Control by the Remote Controller For BRC1E series only Select a thermistor to utilize for the cool/heat mode automatic changeover and setback functions. The sensed temperature will be displayed on the remote controller as the room temperature. : Factory setting Mode First Code...
  • Page 210 Field Setting from Remote Controller SiUS281811EB 1.5.38 Setting Restricted/Permitted for Airflow Block For Sensing flow type only The airflow block function cannot be enabled when closure material kit, fresh air intake kit, separately installed natural evaporation type humidifier, or branch air duct is equipped, due to the possibility of dew condensation.

  • Page 211: Operation Control Mode

    SiUS281811EB Field Setting from Remote Controller Operation Control Mode The operation control mode is compatible with a variety of controls and operations by limiting the functions of the operation remote controller. Furthermore, operations such as remote controller ON/OFF can be limited in accordance with the combination conditions. Centralized controller is normally available for operations.

  • Page 212: Field Settings From Outdoor Unit

    Field Settings from Outdoor Unit SiUS281811EB 2. Field Settings from Outdoor Unit Setting Mode and Monitor Mode The following 3 modes can be changed over with the button switches on the PCB and you can find the present mode by the status of the H1P indicator. H1P H3P H5P H7P H2P H4P H6P (SET)

  • Page 213: Setting Mode 1

    SiUS281811EB Field Settings from Outdoor Unit Setting Mode 1 This mode is used to set and check the following items. 1. Set items In order to make COOL/HEAT selection in a batch of outdoor unit group, change the setting. Used to select COOL or HEAT by individual outdoor COOL/HEAT selection (IND) unit (factory setting).

  • Page 214: Setting Mode 2

    Field Settings from Outdoor Unit SiUS281811EB Setting Mode 2 Press the MODE (BS1) button for 5 Cool / heat unified seconds and enter the setting mode Sets address for cool / heat unified operation. address Low noise / demand Address for low noise / demand operation address Test operation settings Used to conduct test operation without making changes to the PCB and replacing the refrigerant, after the completion of maintenance...
  • Page 215 SiUS281811EB Field Settings from Outdoor Unit Setting item display C/H selection Setting condition display MODE TEST Demand Setting item noise Master Slave Factory setting k h h h h h h Address k h h h h h k Binary number Cool / heat unified address k h k k k k k...
  • Page 216 Field Settings from Outdoor Unit SiUS281811EB Setting item display C/H selection Setting condition display MODE TEST Demand Setting item noise Master Slave Factory setting k h h h h h h k h h h h h k Level 1 (outdoor fan with 6 step or lower) 22 Night-time low noise k h h h h k h setting...
  • Page 217 SiUS281811EB Field Settings from Outdoor Unit Setting item display C/H selection Setting condition display MODE TEST Demand Setting item noise Master Slave Factory setting k h h h h h h –17.7°C (0°F) k h h h h h k –15°C (5°F) k h h h h k h –12.2°C (10°F)

  • Page 218: Monitor Mode

    Field Settings from Outdoor Unit SiUS281811EB Monitor Mode LED display Press the MODE (BS1) button and Setting item Data display enter the monitor mode. H3P H4P l h h h h h h Various setting See the note below. l h h h h h k Cool / heat unified address l h h h h k h Low noise / demand address...
  • Page 219 SiUS281811EB Field Settings from Outdoor Unit  Data such as addresses and number of units is expressed as binary numbers; the two ways of expressing are as follows: Figure 1 The No. 1 cool / heat unified address is expressed as a binary number l h l h l l h consisting of the lower 6 digits.

  • Page 220: Setting Of Low Noise Operation And Demand Operation

    Field Settings from Outdoor Unit SiUS281811EB 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 external control adaptor for outdoor unit (optional), you can lower operating noise by 2-3 dB. When the low noise operation is automatically carried out at night (The external control adaptor for outdoor unit is not required) While in setting mode 2, select the setting condition (i.e., Mode 1, Mode 2, or Mode 3) for...
  • Page 221 SiUS281811EB Field Settings from Outdoor Unit Setting of Demand Operation By connecting the external contact input to the demand input of the external control adaptor for outdoor unit (optional), the power consumption of unit operation can be saved suppressing the compressor operating condition.
  • Page 222 Field Settings from Outdoor Unit SiUS281811EB : ON : OFF : Blink Setting Setting i t t ng No. indication Setting Setting contents indication (Initial setting) contents contents H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P External low noise /...

  • Page 223: Setting Of Refrigerant Recovery Mode

    SiUS281811EB Field Settings from Outdoor Unit Setting of Refrigerant Recovery Mode When carrying out the refrigerant collection on site, fully open the respective electronic expansion valve of indoor and outdoor units All indoor and outdoor unit’s operation are prohibited. Operation 1.

  • Page 224: Check Operation

    Field Settings from Outdoor Unit SiUS281811EB Check Operation To prevent any trouble in the period of installation on site, the system is provided with a test operation mode enabling check for incorrect wiring, stop valve left in closed, coming out (or misplacing with suction pipe thermistor) or discharge pipe thermistor and judgment of piping length, refrigerant overcharging, and learning for the minimum opening degree of electronic expansion valve.

  • Page 225: Setting Of Auxiliary Heater Control

    SiUS281811EB Field Settings from Outdoor Unit Setting of Auxiliary Heater Control To improve efficiency and lower install cost the auxiliary heater can be lockout based on outdoor temperature. Auxiliary heater maximum allowable temperature Auxiliary heater is allowed to energize when the outdoor air temperature is smaller than the auxiliary heater maximum allowable temperature.

  • Page 226: Setting Of Heat Pump Lockout And Emergency Heat Mode

    Field Settings from Outdoor Unit SiUS281811EB 2.10 Setting of Heat Pump Lockout and Emergency Heat Mode Heat pump is locked out when the setting below and/or external input to ABC terminal has been made. Setting item display Setting condition display C/H selection MODE TEST...
  • Page 227 SiUS281811EB Field Settings from Outdoor Unit Heat pump lockout temperature Heat pump would be locked out when the outdoor air temperature is smaller than the heat pump lockout temperature. This setting is only effective when heat pump lockout mode has been set. Setting item display Setting condition display C/H selection...

  • Page 228: Test Operation

    Test Operation SiUS281811EB 3. Test Operation Follow the following procedure to conduct the initial test operation after installation. Check Work Prior to Turning Power Supply ON Is the power supply appropriate? • Check the below items. Have you finished a ductwork to drain? •...

  • Page 229: Test Operation

    SiUS281811EB Test Operation Test Operation To start smoothly, a crankcase heater is equipped to the unit. To power up the crankcase heater in advance, be sure to turn on the power supply 6 hours before operation. Warning Be sure to inform other installers or attach the front panel well before leaving with the power supply turned on for the outdoor unit.
  • Page 230 Test Operation SiUS281811EB  For setting method, see the "Service Precautions" label attached to the front panel of the outdoor unit. (Be sure to keep a record of the setting items to the "Service Precautions" label.)  Don't touch the changeover switches (DS1-1) while setting them. Doing so may result in malfunction.
  • Page 231 SiUS281811EB Test Operation About normal operation check  The compressor will not restart in about 5 minutes even if the ON/OFF button of the remote controller is pressed.  When system operation is stopped by the remote controller, the outdoor unit may continue operating for further 1 minute at maximum.

  • Page 232: Error Codes And Corresponding Measures

    Test Operation SiUS281811EB Error Codes and Corresponding Measures Please check the remote controller connected to the indoor unit for verification. Error code Description Solution Primary code code High pressure switch activated (S1PH) Check the stop valve or (field) piping abnormality or the airflow on the air cooling heat exchanger.
  • Page 233 SiUS281811EB Test Operation Error code Description Solution Primary code code Q1/Q2 or indoor-outdoor units wiring error Check (Q1/Q2) wiring. Q1/Q2 or indoor-outdoor units wiring error Check (Q1/Q2) wiring. System test operation ends abnormally. Re-execute the test operation. System mismatch Check if there are any other defective Mismatched indoor unit models used (R-410A, indoor units and verify if the indoor unit R-407C, RA, Hydrobox, etc.).

  • Page 234: When Turning On Power First Time

    Test Operation SiUS281811EB 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 …. Blinks Can also be set during operation described above. Indoor unit If ON button is pushed during operation described above, the UH error indicator blinks.
  • Page 235 SiUS281811EB Part 6 Service Diagnosis 1. Servicing Items to be Confirmed .............232 1.1 Troubleshooting..................232 1.2 Precautions for Maintenance..............232 1.3 Refrigerant Properties (R-410A)............... 234 2. Symptom-based Troubleshooting ............235 2.1 Indoor Unit Overall ................... 235 2.2 With Infrared Presence/Floor Sensor ............238 3.
  • Page 236 SiUS281811EB 5.28 Outdoor Main PCB Abnormality ............... 297 5.29 Activation of High Pressure Switch ............298 5.30 Activation of Low Pressure Sensor ............300 5.31 Compressor Motor Lock ................302 5.32 Outdoor Fan Motor Abnormality ............... 304 5.33 Electronic Expansion Valve Coil Abnormality........... 306 5.34 Discharge Pipe Temperature Abnormality ..........
  • Page 237 SiUS281811EB 6.14 Electronic Expansion Valve Coil Check ........... 355 6.15 Fan Motor Connector Check for FTQ-TA ..........358 Part 6 Service Diagnosis...

  • Page 238: Servicing Items To Be Confirmed

    Servicing Items to be Confirmed SiUS281811EB 1. Servicing Items to be Confirmed Troubleshooting (1) Initial verification and troubleshooting 1. Properly understand the end user's needs and issues. 2. Check the cause of errors according to the description provided by the end user. 3.
  • Page 239 SiUS281811EB Servicing Items to be Confirmed (4) Precautions for piping work and refrigerant charging: This unit uses R-410A refrigerant. Pay attention to the following conditions. 1. The charging pipe and the manifold tube use R-410A products for pressure maintenance and avoiding contamination by impurities (SUNISO oil, etc.).

  • Page 240: Refrigerant Properties (R-410A)

    Servicing Items to be Confirmed SiUS281811EB Refrigerant Properties (R-410A) MPa G psi G –0.1 –15 –50 –40 –30 –20 –10 °C –58 –40 –22 –4 °F Temperature Absolute Absolute Absolute Absolute Temperature Temperature Temperature Temperature Pressure Pressure Pressure Pressure °C °F °C °F...

  • Page 241: Symptom-Based Troubleshooting

    SiUS281811EB Symptom-based Troubleshooting 2. Symptom-based Troubleshooting Indoor Unit Overall 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 242 Symptom-based Troubleshooting SiUS281811EB Symptom Supposed Cause Countermeasure COOL/HEAT The remote controller displays This remote controller has no option Use a remote controller with option to selection is CENTRAL CONTROL. to select cooling operation. select cooling operation. disabled. The remote controller displays COOL/HEAT selection is made using Use the COOL/HEAT selection CENTRAL CONTROL, and the...
  • Page 243 SiUS281811EB Symptom-based Troubleshooting Symptom Supposed Cause Countermeasure 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 from the stop for an extended period the system.

  • Page 244: With Infrared Presence/Floor Sensor

    Symptom-based Troubleshooting SiUS281811EB With Infrared Presence/Floor Sensor Condition Measure "Louver operation different from setting" or "No downward Refer to the flowchart below. airflow in heating operation" Individual airflow direction setting different from the actual · Check the "Louver operation different from setting" error airflow direction diagnosis.

  • Page 245: Error Code Via Remote Controller

    SiUS281811EB Error Code via Remote Controller 3. Error Code via Remote Controller Wired Remote Controller 3.1.1 BRC1E73 The following will be displayed on the screen when an error (or a warning) occurs during operation. Check the error code and take the corrective action specified for the particular model. Screen Operation lamp (1) Check if it is an error or warning.

  • Page 246: Wireless Remote Controller

    Error Code via Remote Controller SiUS281811EB 3.1.2 BRC1H71W Home screen When the indoor unit is in error, the controller will display Auto Cool on the home screen. Room Information screen Press and hold on the Home screen for 5 seconds. 12:34 The unit number and error code will be displayed at the bottom of the information screen.
  • Page 247 SiUS281811EB Error Code via Remote Controller  The upper digit of the code changes as shown below. O0 A C E H F J L P U 9 8 7 6 5 4 "UP" button "DOWN" button Continuous beep : Both upper and lower digits match. (Error code is confirmed.) 2 short beeps : The upper digit matches but the lower digit does not.

  • Page 248: Error Code Indication By Outdoor Unit Pcb

    Error Code Indication by Outdoor Unit PCB SiUS281811EB 4. Error Code Indication by Outdoor Unit PCB Monitor mode To enter the monitor mode, press Error Description Error Code the MODE (BS1) button when in PCB abnormality “Setting mode 1”. Abnormal high pressure switch High pressure switch activated Abnormal low pressure switch Low pressure switch activated...
  • Page 249 SiUS281811EB Error Code Indication by Outdoor Unit PCB k: ON h: OFF l: Blink Confirmation of Error 1 Confirmation of Error 2 Confirmation of Error 3 Confirmation of Error 4 Error 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 Display of error Display of error description Display 1 of...
  • Page 250 Error Code Indication by Outdoor Unit PCB SiUS281811EB Monitor mode Error Description Error Code To enter the monitor mode, press Inverter circuit capacitor high voltage Imbalance of inverter power supply the MODE (BS1) button when in voltage “Setting mode 1”. Defective temperature sensor of Defective thermistor of inverter fin inverter radiation fin...
  • Page 251 SiUS281811EB Error Code Indication by Outdoor Unit PCB k: ON h: OFF l: Blink Confirmation of Error 1 Confirmation of Error 2 Confirmation of Error 3 Confirmation of Error 4 Error 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 Display 1 of Display 2 of Display of error...

  • Page 252: Troubleshooting By Error Codes

    Troubleshooting by Error Codes SiUS281811EB 5. Troubleshooting by Error Codes Error Codes and Description k: ON h: OFFl : Blink Operation Reference Error code Description lamp Page External protection device abnormality External protection device abnormality (FTQ-TA only) Indoor unit PCB abnormality Drain level control system (S1L) abnormality Indoor fan motor (M1F) lock, overload Indoor fan motor abnormality...
  • Page 253 SiUS281811EB Troubleshooting by Error Codes Operation Reference Error code Description lamp Page Outdoor main PCB abnormality Activation of high pressure switch Activation of low pressure sensor Compressor motor lock Outdoor fan motor abnormality Electronic expansion valve coil abnormality Discharge pipe temperature abnormality Refrigerant overcharged Outdoor air thermistor abnormality Discharge pipe thermistor abnormality...

  • Page 254: Error Codes - Sub Codes

    Troubleshooting by Error Codes SiUS281811EB Error Codes - Sub Codes If an error code like the one shown below is displayed when a wired remote controller is in use, make a detailed diagnosis. 5.2.1 Indoor Unit Troubleshooting Error code Description of error Description of diagnosis A0 - 01 External protection device abnormality...

  • Page 255: External Protection Device Abnormality (Except Ftq-Ta)

    SiUS281811EB Troubleshooting by Error Codes External Protection Device Abnormality (Except FTQ-TA) Error Code Applicable All indoor models (except FTQ-TA) Models Method of Error Detect open or short circuit between external input terminals in indoor unit. Detection Error Decision When an open circuit occurs between external input terminals with the remote controller set for Conditions external ON/OFF terminal.

  • Page 256: External Protection Device Abnormality (Ftq-Ta Only)

    Troubleshooting by Error Codes SiUS281811EB External Protection Device Abnormality (FTQ-TA Only) A0-01 Error Code Applicable FTQ-TA Models Method of Error Detect open or short circuit between external input terminals in indoor unit. Detection Error Decision When an open circuit occurs between external input terminals. Conditions Supposed ...

  • Page 257: Indoor Unit Pcb Abnormality

    SiUS281811EB Troubleshooting by Error Codes Indoor Unit PCB Abnormality Error Code Applicable All indoor models Models Method of Error Data from EEPROM is checked. Detection Error Decision When data cannot be correctly received from the EEPROM Conditions EEPROM: Type of nonvolatile memory. Maintains memory contents even when the power supply is turned OFF.

  • Page 258: Drain Level Control System (S1L) Abnormality

    Troubleshooting by Error Codes SiUS281811EB Drain Level Control System (S1L) Abnormality Error Code Applicable FCQ-TA, FCQ-AA, FBQ-P, FBQ-TB Models Method of Error By float switch OFF detection Detection Error Decision When the float switch goes OFF when conditions for rise of water level are not met Conditions Supposed ...
  • Page 259 SiUS281811EB Troubleshooting by Error Codes Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Is the short circuit Is the drain pump mechanism connected? connector connected to the Short circuit connector indoor unit PCB? connection ( 1)

  • Page 260: Indoor Fan Motor (M1F) Lock, Overload

    Troubleshooting by Error Codes SiUS281811EB Indoor Fan Motor (M1F) Lock, Overload Error Code Applicable FCQ-TA, FAQ-TA, FBQ18/24TB Models Method of Error Abnormal fan revolutions are detected by signal output from the fan motor. Detection Error Decision When the fan revolutions do not increase Conditions Supposed ...
  • Page 261 SiUS281811EB Troubleshooting by Error Codes Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Turn OFF the power supply, and then wait for a period of 10 minutes. Are there any foreign Remove the foreign matter.

  • Page 262: Indoor Fan Motor Abnormality

    Troubleshooting by Error Codes SiUS281811EB Indoor Fan Motor Abnormality 5.8.1 Indoor Fan Motor Abnormality (FCQ-AA Models) Error Code Applicable FCQ-AA Models Method of Error  Detection from the current flow on the PCB (A1P) Detection  Detection from the current flow on the PCB when the fan motor starting operation Error Decision ...
  • Page 263 SiUS281811EB Troubleshooting by Error Codes The HAP lamp on the indoor unit Replace the indoor unit control control PCB is PCB (A1P). blinking. Replace the fan motor (M1F). 1. Check also if the relay connector between the indoor unit control PCB and the fan motor are correctly connected.
  • Page 264 Troubleshooting by Error Codes SiUS281811EB 5.8.2 Indoor Fan Motor Abnormality (FHQ-P, FHQ-M Models) Error Code Applicable FHQ-P, FHQ-M Models Method of Error This error is detected if there is no revolution detection signal output from the fan motor. Detection Error Decision When no revolutions can be detected even at the maximum output voltage to the fan Conditions Supposed...
  • Page 265 SiUS281811EB Troubleshooting by Error Codes 5.8.3 Indoor Fan Motor Abnormality (FBQ-P, FBQ30-48TB Models) Error Code Applicable FBQ-P, FBQ30-48TB Models Method of Error Error from the current flow on the fan PCB Detection Error from the rotation speed of the fan motor in operation Error from the position signal of the fan motor Error from the current flow on the fan PCB when the fan motor starting operation Error Decision...
  • Page 266 Troubleshooting by Error Codes SiUS281811EB Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Turn off the power and wait for 10 minutes. There is a foreign matter around Remove the foreign matter.
  • Page 267 SiUS281811EB Troubleshooting by Error Codes The resistance among U, V, and W are unbalanced Replace the indoor fan motor. or short circuited. CHECK 16 Remove the signal connector from the fan motor and check the resistance. Between V and GND terminals, and between GND Replace the indoor fan and H...

  • Page 268: Blower Motor Not Running

    Troubleshooting by Error Codes SiUS281811EB Blower Motor Not Running Error Code Applicable FTQ-TA Models Outline Error is issued if the indoor unit determines that the indoor fan motor cannot rotate. Error Decision  Determining successive abnormalities Conditions Checks the rotation speed at 5-second intervals using the feedback of the fan motor. If that figure falls below 50 rpm 5 times successively, it is deemed abnormal operation.

  • Page 269: Indoor Fan Motor Status Abnormality

    SiUS281811EB Troubleshooting by Error Codes 5.10 Indoor Fan Motor Status Abnormality A6-20 Error Code Applicable FTQ-TA Models Outline The indoor unit periodically receives control status information from the fan motor. Error is issued when the information shows abnormality. Error Decision If the information shows Power Limit or Temp Limit status, it will be deemed a MOTOR LIMIT Conditions abnormal operation.

  • Page 270: Low Indoor Airflow

    Troubleshooting by Error Codes SiUS281811EB 5.11 Low Indoor Airflow A6-21 Error Code Applicable FTQ-TA Models Outline Error is issued if the indoor unit determines that the indoor fan motor rotation is insufficient, regardless of the rotation command from indoor unit. Error Decision ...

  • Page 271: Swing Flap Motor Abnormality

    SiUS281811EB Troubleshooting by Error Codes 5.12 Swing Flap Motor Abnormality Error Code Applicable FHQ-P, FHQ-M Models Method of Error Utilizes ON/OFF of the limit switch when the motor turns. Detection Error Decision When ON/OFF of the micro-switch for positioning cannot be reversed even though the swing flap Conditions motor is energized for a specified amount of time (about 30 seconds).
  • Page 272 Troubleshooting by Error Codes SiUS281811EB Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Is the connector ( 1) Connect correctly. correctly connected? the limit switch's connector Connect correctly. ( 2) correctly connected? Turn the power supply OFF once and back ON, and check...

  • Page 273: Power Supply Voltage Abnormality

    SiUS281811EB Troubleshooting by Error Codes 5.13 Power Supply Voltage Abnormality Error Code Applicable FBQ-P, FBQ-TB Models Method of Error Error is detected by checking the input voltage of the fan motor. Detection Error Decision When the input voltage of fan motor is 150 V or less, or 386 V or more. Conditions Supposed ...

  • Page 274: Blower Motor Stops For Over/Under Voltage

    Troubleshooting by Error Codes SiUS281811EB 5.14 Blower Motor Stops for Over/Under Voltage Error Code Applicable FTQ-TA Models Outline The indoor unit periodically receives control status information from the fan motor. Error is issued when the information shows abnormality. Error Decision If the information shows Over/Under Voltage status, it will be deemed a MOTOR VOLTS abnormal Conditions operation.

  • Page 275: Electronic Expansion Valve Coil Abnormality, Dust Clogging

    SiUS281811EB Troubleshooting by Error Codes 5.15 Electronic Expansion Valve Coil Abnormality, Dust Clogging Error Code Applicable All indoor models Models Method of Error Electronic expansion valve coil conditions are checked via microcomputer. Detection The electronic expansion valve main body is checked for dust clogging via microcomputer. Error Decision Pin input for electronic expansion valve coil is abnormal when initializing microcomputer.

  • Page 276: Drain Level Above Limit

    Troubleshooting by Error Codes SiUS281811EB 5.16 Drain Level Above Limit Error Code Applicable FCQ-TA, FCQ-AA, FBQ-P, FBQ-TB Models Method of Error Water leakage is detected based on float switch ON/OFF operation while the compressor is not in Detection operation. Error Decision When the float switch changes from ON to OFF while the compressor is not in operation.

  • Page 277: Self-Cleaning Decoration Panel Abnormality

    SiUS281811EB Troubleshooting by Error Codes 5.17 Self-Cleaning Decoration Panel Abnormality Error Code Applicable FCQ-TA (when self-cleaning decoration panel BYCQ125BGW1 is installed) Models FCQ-AA (when self-cleaning decoration panel BYCQ54EEGFU is installed) Method of Error Error is detected by abnormal signal from the self-cleaning decoration panel. Detection Error Decision Any of the following conditions is met while the unit is in operation.
  • Page 278 Troubleshooting by Error Codes SiUS281811EB Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Is the transmission between self-cleaning decoration panel Go to Diagnosis Flowchart-1. and indoor unit (Transmission error between normal? self-cleaning decoration panel and indoor unit)
  • Page 279 SiUS281811EB Troubleshooting by Error Codes Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Diagnosis Flowchart-1 AH-03 Transmission error between self-cleaning decoration panel and indoor unit Is the connector ( 1) on the indoor unit control Properly connect the PCB properly connected? connector.
  • Page 280 Troubleshooting by Error Codes SiUS281811EB Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Diagnosis Flowchart-2 AH-04 Dust detection sensor error Is the connector X12A on the self-cleaning decoration panel PCB Properly connect the properly connected? connector.
  • Page 281 SiUS281811EB Troubleshooting by Error Codes Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Diagnosis Flowchart-3 AH-05 Dust collection sign Is the inside of dust collection port clogged Clean the dust from the inside by dust? of dust collection port.
  • Page 282 Troubleshooting by Error Codes SiUS281811EB Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Diagnosis Flowchart-4 AH-06 Air filter rotation error Is the filter Properly attached the filter. properly attached? Is there any foreign matter in the filter Remove the foreign matter.
  • Page 283 SiUS281811EB Troubleshooting by Error Codes From the previous page Start operation with remote controller. Error AH recurs, Normal. or the self-cleaning decoration panel lamp (red) blinks? The error could be caused by other causes. Refer to other diagnosis flowcharts in the following order: AH-05→03→04→07→08→09.
  • Page 284 Troubleshooting by Error Codes SiUS281811EB Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Diagnosis Flowchart-5 AH-07 Damper rotation error Is the damper Properly attached the damper. properly attached? Is there any foreign matter in the damper Remove the foreign matter.
  • Page 285 SiUS281811EB Troubleshooting by Error Codes From the previous page Start operation with remote controller. Error AH recurs, Normal. or the self-cleaning decoration panel lamp (red) blinks? The error could be caused by other causes. Refer to other diagnosis flowcharts in the following order: AH-05→03→04→06→08→09.
  • Page 286 Troubleshooting by Error Codes SiUS281811EB Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Diagnosis Flowchart-6 AH-08 Filter auto clean operation error Is there any external factor other than the Remove the external factor.
  • Page 287 SiUS281811EB Troubleshooting by Error Codes Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Diagnosis Flowchart-7 AH-09 Filter auto clean operation start disabled error Has any air conditioning operation been Stop the air conditioning running continuously for operation and perform filter...

  • Page 288: Defective Capacity Setting

    Troubleshooting by Error Codes SiUS281811EB 5.18 Defective Capacity Setting Error Code Applicable All indoor models Models Method of Error Capacity is determined according to resistance of the capacity setting adaptor and the memory Detection inside the IC memory on the indoor unit PCB, and whether the value is normal or abnormal is determined.

  • Page 289: Transmission Abnormality (Between Indoor Unit Pcb And Fan Pcb)

    SiUS281811EB Troubleshooting by Error Codes 5.19 Transmission Abnormality (between Indoor Unit PCB and Fan PCB) Error Code Applicable FBQ-P, FBQ-TB Models Method of Error Transmission conditions between the indoor unit main PCB (A1P) and fan PCB (A2P) are checked Detection via microcomputer.
  • Page 290 Troubleshooting by Error Codes SiUS281811EB 2. Method to check transmission part of indoor unit control PCB. (1) Turn OFF the power and remove the connector X70A of indoor unit control PCB (A1P). (2) Short circuit X70A. (3) After turning ON the power, check below numbers under field setting from remote controller. (Confirmation: Second code No.

  • Page 291: Blower Motor Communication Error

    SiUS281811EB Troubleshooting by Error Codes 5.20 Blower Motor Communication Error C1-07 Error Code Applicable FTQ-TA Models Outline Error is issued if transmission abnormalities occur between indoor unit and fan motor. Error Decision If the response message from the fan motor is an abnormal message, and determined as such by Conditions the indoor unit, the indoor unit will execute a retry.

  • Page 292: Thermistor Abnormality

    Troubleshooting by Error Codes SiUS281811EB 5.21 Thermistor Abnormality C4, C5, C9, CA Error Code Applicable C4, C5: All indoor units Models C9: except FTQ-TA models CA: FBQ-P models only Method of Error The error is determined by the temperature detected by the thermistor. Detection Error Decision The thermistor becomes disconnected or shorted while the unit is running.

  • Page 293: Combination Abnormality (Between Indoor Unit Pcb And Fan Pcb)

    SiUS281811EB Troubleshooting by Error Codes 5.22 Combination Abnormality (between Indoor Unit PCB and Fan PCB) Error Code Applicable FBQ-P, FBQ-TB Models Method of Error Transmission conditions with fan PCB (A2P) are checked using the indoor unit PCB (A1P). Detection Error Decision Communication data of fan PCB (A2P) is determined as incorrect.

  • Page 294: Blower Motor Hp Mismatch

    Troubleshooting by Error Codes SiUS281811EB 5.23 Blower Motor HP Mismatch C6-01 Error Code Applicable FTQ-TA Models Outline Error is issued if the manufacturer ID and output of the connected fan motor do not match those recognized by the indoor unit. Error Decision Gathers information on the manufacturer ID and output of the fan motor when initializing the fan Conditions...

  • Page 295: Indoor Blower Does Not Have Required Parameters To Function

    SiUS281811EB Troubleshooting by Error Codes 5.24 Indoor Blower Does Not Have Required Parameters to Function C6-02 Error Code Applicable FTQ-TA Models Outline Indoor units perform required settings for control on the fan motor, but if the minimum required settings are not made then information indicating as such will be included among the periodic control status information.

  • Page 296: Remote Sensor Abnormality

    Troubleshooting by Error Codes SiUS281811EB 5.25 Remote Sensor Abnormality Error Code Applicable FTQ-TA Models Method of Error The error is detected by remote sensor temperature. Detection Error Decision When the remote sensor becomes disconnected or shorted while the unit is running. Conditions Supposed ...

  • Page 297: Infrared Presence/Floor Sensor Error

    SiUS281811EB Troubleshooting by Error Codes 5.26 Infrared Presence/Floor Sensor Error Error Code Applicable FCQ-TA, FCQ-AA Models Method of Error The contents of a failure vary with the detailed error code. Check the code and proceed with the Detection flowchart. Error Decision Error is detected based on sensor output signals Conditions Supposed...

  • Page 298: Diagnosis Procedure

    Troubleshooting by Error Codes SiUS281811EB Troubleshooting Diagnosis procedure 1 Infrared presence sensor error (Error code CE-01) Is the connection of the connector on infrared presence Connect the connector correctly. sensor PCB and the connector ( 1) normal? Is the connection of the Connect the connector correctly.
  • Page 299 SiUS281811EB Troubleshooting by Error Codes Troubleshooting Diagnosis procedure 2 Infrared floor sensor error (Error code CE-02) Is the connection of the connector on infrared floor Connect the connector correctly. sensor PCB and the connector ( 1) normal? Is the connection of the Connect the connector correctly.
  • Page 300 Troubleshooting by Error Codes SiUS281811EB Troubleshooting Diagnosis procedure 3 Infrared floor sensor error (Error code CE-03) Is the connection of the connector on infrared floor Connect the connector correctly. sensor PCB and the connector (1) normal? Is the connection of the Connect the connector correctly.
  • Page 301 SiUS281811EB Troubleshooting by Error Codes Troubleshooting Diagnosis procedure 4 Infrared floor sensor error (Error code CE-04) Is the connection of the connector on infrared floor Connect the connector correctly. sensor PCB and the connector ( 1) normal? Is the connection of the Connect the connector correctly.

  • Page 302: Remote Controller Thermistor Abnormality

    Troubleshooting by Error Codes SiUS281811EB 5.27 Remote Controller Thermistor Abnormality Error Code Applicable All indoor models Models Method of Error Error detection is carried out by the temperature detected by remote controller thermistor. Detection Error Decision When the remote controller thermistor becomes disconnected or shorted while the unit is running. Error code is displayed but the system operates continuously.

  • Page 303: Outdoor Main Pcb Abnormality

    SiUS281811EB Troubleshooting by Error Codes 5.28 Outdoor Main PCB Abnormality Error Code Applicable All outdoor units Models Method of Error Abnormality is detected under the communication conditions in the hardware section between the Detection indoor unit and outdoor unit. Error Decision When the communication conditions in the hardware section between the indoor unit and the Conditions outdoor unit are not normal.

  • Page 304: Activation Of High Pressure Switch

    Troubleshooting by Error Codes SiUS281811EB 5.29 Activation of High Pressure Switch Error Code Applicable All outdoor units Models Method of Error Abnormality is detected when the contact of the high pressure switch opens. Detection Use the protection device circuit to test high pressure switch conduction. Error Decision Part of the protection device has an open circuit.
  • Page 305 SiUS281811EB Troubleshooting by Error Codes Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check for the points shown below. (1) Is the stop valve open? (2) Is the high pressure switch connector properly connected to the main PCB? (3) Does the high pressure switch have continuity? Are the three points...

  • Page 306: Activation Of Low Pressure Sensor

    Troubleshooting by Error Codes SiUS281811EB 5.30 Activation of Low Pressure Sensor Error Code Applicable All outdoor units Models Method of Error Abnormality is detected by the pressure value with the low pressure sensor. Detection Use the outdoor main PCB to determine the low pressure sensor pressure test value. Error Decision Error is generated when the low pressure drops below a specific pressure level.
  • Page 307 SiUS281811EB Troubleshooting by Error Codes Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Is the stop Open the stop valve. valve open? (1)Mount a pressure gauge on the low pressure service port.

  • Page 308: Compressor Motor Lock

    Troubleshooting by Error Codes SiUS281811EB 5.31 Compressor Motor Lock Error Code Applicable All outdoor units Models Method of Error PCB takes the position signal from UVW line connected between the inverter and compressor, and Detection the error is detected when any abnormality is observed in the phase-current waveform. Error Decision This error will be output when the compressor motor does not start up even in forced startup mode.
  • Page 309 SiUS281811EB Troubleshooting by Error Codes insulation resistance is Replace the compressor. low (i.e., not more than 100 k:.) Power OFF Check the compressor motor coil for any broken wire. Some phase has a broken wire. Restart the compressor, and then End of work check whether or not Defective pressure...

  • Page 310: Outdoor Fan Motor Abnormality

    Troubleshooting by Error Codes SiUS281811EB 5.32 Outdoor Fan Motor Abnormality Error Code Applicable All outdoor units Models Method of Error The fan motor circuit error is detected based on the rotation frequency detected by Hall IC during Detection the fan motor operation. Error Decision In the condition of fan motor rotation, the number of rotation is below the fixed number for more Conditions...
  • Page 311 SiUS281811EB Troubleshooting by Error Codes Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Is the voltage between L1 and N of power terminal board Calibrate the power voltage. X1M within the power supply If L1 and N phases are voltage ±10%?

  • Page 312: Electronic Expansion Valve Coil Abnormality

    Troubleshooting by Error Codes SiUS281811EB 5.33 Electronic Expansion Valve Coil Abnormality Error Code Applicable All outdoor units Models Method of Error Check continuity of electronic expansion valve coil. Detection Error Decision No current is detected in the common (COM [+]) when power supply is ON. Conditions Supposed ...

  • Page 313: Discharge Pipe Temperature Abnormality

    SiUS281811EB Troubleshooting by Error Codes 5.34 Discharge Pipe Temperature Abnormality Error Code Applicable All outdoor units Models Method of Error Abnormality is detected according to the temperature detected by the discharge pipe thermistor. Detection Error Decision The discharge pipe temperature rises to an abnormally high level. Conditions The discharge pipe temperature rises suddenly.

  • Page 314: Refrigerant Overcharged

    Troubleshooting by Error Codes SiUS281811EB 5.35 Refrigerant Overcharged Error Code Applicable All outdoor units Models Method of Error Excessive charging of refrigerant is detected by using the outdoor air temperature, heat exchanger Detection deicer temperature and liquid pipe temperature during a check operation. Error Decision During a check operation, the amount of refrigerant will be calculated based on the outdoor Conditions...

  • Page 315: Thermistor Abnormality

    SiUS281811EB Troubleshooting by Error Codes 5.36 Thermistor Abnormality H9, J3, J5, J6, J7, J9 Error Code Applicable All outdoor units Models Method of Error Error is detected from the temperature detected by the thermistor (1). Detection Error Decision The thermistor has short circuit or open circuit. Conditions Supposed ...

  • Page 316: High Pressure Sensor Abnormality

    Troubleshooting by Error Codes SiUS281811EB 5.37 High Pressure Sensor Abnormality Error Code Applicable All outdoor units Models Method of Error Error is detected from the pressure detected by the high pressure sensor. Detection Error Decision The high pressure sensor is short circuit or open circuit. Conditions Pressure range: 0-4.3 MPa (0-624 psi) Supposed...

  • Page 317: Low Pressure Sensor Abnormality

    SiUS281811EB Troubleshooting by Error Codes 5.38 Low Pressure Sensor Abnormality Error Code Applicable All outdoor units Models Method of Error Error is detected from pressure detected by low pressure sensor. Detection Error Decision The low pressure sensor is short circuit or open circuit. Conditions Pressure range: 0-1.7 MPa (0-247 psi) Supposed...

  • Page 318: Inverter Pcb Abnormality

    Troubleshooting by Error Codes SiUS281811EB 5.39 Inverter PCB Abnormality Error Code Applicable All outdoor units Models Method of Error  Error is detected based on the current value during waveform output before starting Detection compressor.  Error is detected based on the value from current sensor during synchronous operation when starting the unit.

  • Page 319: Radiation Fin Temperature Rise Abnormality

    SiUS281811EB Troubleshooting by Error Codes 5.40 Radiation Fin Temperature Rise Abnormality Error Code Applicable All outdoor units Models Method of Error The radiation fin temperature is detected by the radiation fin thermistor. Detection Error Decision The radiation fin temperature exceeds a certain temperature. Conditions Supposed ...

  • Page 320: Compressor Instantaneous Overcurrent

    Troubleshooting by Error Codes SiUS281811EB 5.41 Compressor Instantaneous Overcurrent Error Code Applicable All outdoor units Models Method of Error Error is detected from current flowing in the power transistor. Detection Error Decision An excessive current flows in the power transistor. Conditions Supposed ...

  • Page 321: Compressor Overcurrent

    SiUS281811EB Troubleshooting by Error Codes 5.42 Compressor Overcurrent Error Code Applicable All outdoor units Models Method of Error Error is detected by current flowing in the power transistor. Detection Error Decision Overload in the compressor is detected. Conditions Supposed  Compressor overload Causes ...

  • Page 322: Compressor Startup Abnormality

    Troubleshooting by Error Codes SiUS281811EB 5.43 Compressor Startup Abnormality Error Code Applicable All outdoor units Models Method of Error Error is detected by the power transistor current Detection Error Decision Compressor overload during activation Conditions Supposed  Defective compressor Causes ...

  • Page 323: Transmission Error Between Microcomputers On Outdoor Unit Main Pcb

    SiUS281811EB Troubleshooting by Error Codes 5.44 Transmission Error between Microcomputers on Outdoor Unit Main PCB Error Code Applicable All outdoor units Models Method of Error Transmission conditions between microcomputers on the outdoor main PCB are tested via Detection microcomputer. Error Decision No normal transmission after a certain period of time Conditions Supposed...

  • Page 324: Inverter Circuit Capacitor High Voltage

    Troubleshooting by Error Codes SiUS281811EB 5.45 Inverter Circuit Capacitor High Voltage Error Code Applicable All outdoor units Models Method of Error The voltage waveform of the main circuit capacitor of the inverter is used to check for errors. Detection Error Decision The above-mentioned voltage waveform looks like the waveform of the power supply with a Conditions missing phase...

  • Page 325: Radiation Fin Thermistor Abnormality

    SiUS281811EB Troubleshooting by Error Codes 5.46 Radiation Fin Thermistor Abnormality Error Code Applicable All outdoor units Models Method of Error Resistance of the following thermistor is detected when the compressor is not operating. Detection (1) Radiation fin thermistor (2) PCB circuit thermistor Error Decision When the resistance value of thermistor becomes a value equivalent to open circuited or short Conditions...

  • Page 326: Refrigerant Shortage

    Troubleshooting by Error Codes SiUS281811EB 5.47 Refrigerant Shortage Error Code Applicable All outdoor units Models Method of Error Refrigerant shortage check is conducted based on the discharge pipe thermistor temperature and Detection the low-pressure saturated temperature. Error Decision Microcomputer is used to determine and check for system refrigerant shortage. The unit can keep operating but there is an unconfirmed error.
  • Page 327 SiUS281811EB Troubleshooting by Error Codes Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Is the low pressure less or equal to 0.25 MPa Short of refrigerant, closed stop Is it cooling? (36.3 psi)? valve, or blocked cooling...

  • Page 328: Power Supply Insufficient Or Instantaneous Abnormality

    Troubleshooting by Error Codes SiUS281811EB 5.48 Power Supply Insufficient or Instantaneous Abnormality Error Code Applicable All outdoor units Models Method of Error The main circuit capacitor voltage of the inverter and the power supply voltage is checked. Detection Error Decision The main circuit capacitor of the tested inverter has abnormal voltage or the power supply voltage Conditions is abnormal.
  • Page 329 SiUS281811EB Troubleshooting by Error Codes Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Is the power supply voltage between Calibrate the power voltage. L1 and L2 within 208 V –10% If L2 and Phase N are disconnected, to 230 V +10%? replace the distribution box.

  • Page 330: Check Operation Not Executed

    Troubleshooting by Error Codes SiUS281811EB 5.49 Check Operation Not Executed Error Code Applicable All outdoor units Models Method of Error Determined based on whether check operation is executed or not Detection Error Decision Error is decided when the unit starts operation without check operation. Conditions Supposed Check operation not executed...

  • Page 331: Transmission Error Between Indoor Units And Outdoor Units

    SiUS281811EB Troubleshooting by Error Codes 5.50 Transmission Error between Indoor Units and Outdoor Units Error Code Applicable All indoor and outdoor units Models Method of Error Microcomputer checks if transmission between indoor and outdoor units is normal. Detection Error Decision When transmission is not carried out normally for a certain amount of time Conditions Supposed...
  • Page 332 Troubleshooting by Error Codes SiUS281811EB Outdoor unit PCB Replace the outdoor main microcomputer monitor PCB (A1P). (HAP) blinks. Operation ready lamp (H2P) is blinking. Lamp does not go Press and hold the RESET off for 12 minutes or (BS5) button on the outdoor more.

  • Page 333: Transmission Error Between Remote Controller And Indoor Unit

    SiUS281811EB Troubleshooting by Error Codes 5.51 Transmission Error between Remote Controller and Indoor Unit Error Code Applicable All indoor units Models Method of Error Microcomputer checks if transmission between indoor unit and remote controller is normal. Detection Error Decision Normal transmission does not continue for specified period. Conditions Supposed ...

  • Page 334: Transmission Error Between Main And Sub Remote Controllers

    Troubleshooting by Error Codes SiUS281811EB 5.52 Transmission Error between Main and Sub Remote Controllers Error Code Applicable All indoor units Models Method of Error In case of controlling with 2 remote controllers, check the system using microcomputer if signal Detection transmission between indoor unit and remote controller (main and sub) is normal.

  • Page 335: Transmission Error Between Indoor And Outdoor Units In The Same System

    SiUS281811EB Troubleshooting by Error Codes 5.53 Transmission Error between Indoor and Outdoor Units in the Same System Error Code Applicable All indoor units All outdoor units Models Method of Error Error signal for the other indoor units is detected within the system by outdoor unit PCB. Detection Error Decision The error decision is made on any other indoor unit within the system concerned.

  • Page 336: Improper Combination Of Indoor And Outdoor Units, Indoor Units And Remote Controller

    Troubleshooting by Error Codes SiUS281811EB 5.54 Improper Combination of Indoor and Outdoor Units, Indoor Units and Remote Controller Error Code Applicable All indoor units All outdoor units Models Method of Error A difference occurs in data by the type of refrigerant between indoor and outdoor units. Detection The number of indoor units is out of the allowable range.
  • Page 337 SiUS281811EB Troubleshooting by Error Codes Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Is the outdoor unit PCB Check the model name of the replaced by the backup PCB? outdoor unit PCB and then replace the old one.

  • Page 338: Incorrect Electric Heater Capacity Setting

    Troubleshooting by Error Codes SiUS281811EB 5.55 Incorrect Electric Heater Capacity Setting UA-17 Error Code Applicable FTQ-TA Models Outline After attaching optional electric heater, if the electric heater capacity setting (11 (21)-5) is made mistakenly for heaters not featured in the lineup, heating via unintended levels of airflow will be prevented.

  • Page 339: Address Duplication Of Centralized Controller

    SiUS281811EB Troubleshooting by Error Codes 5.56 Address Duplication of Centralized Controller Error Code Applicable All indoor units Models Method of Error The principal indoor unit detects the same address as that of its own on any other indoor unit. Detection Error Decision The error decision is made as soon as the abnormality aforementioned is detected.

  • Page 340: Transmission Error Between Centralized Controller And Indoor Unit

    Troubleshooting by Error Codes SiUS281811EB 5.57 Transmission Error between Centralized Controller and Indoor Unit Error Code Applicable All indoor units Centralized controller Models Method of Error Microcomputer checks if transmission between indoor unit and centralized controller is normal. Detection Error Decision When transmission is not carried out normally for a certain amount of time Conditions Supposed...

  • Page 341: System Not Set

    SiUS281811EB Troubleshooting by Error Codes 5.58 System Not Set Error Code Applicable All indoor units Models All outdoor units Method of Error On check operation, the number of indoor units in terms of transmission is not corresponding to that Detection of indoor units that have made changes in temperature.

  • Page 342: System Abnormality, Refrigerant System Address Undefined

    Troubleshooting by Error Codes SiUS281811EB 5.59 System Abnormality, Refrigerant System Address Undefined Error Code Applicable All indoor units All outdoor units Models Method of Error System detects an indoor unit whose address is not defined by automatic address function. Automatic address refers to the automatic designated address of indoor unit and outdoor unit Detection when connected to the power after installation or wiring replacement (with the RESET (BS5) button pressed for more than 5 seconds).

  • Page 343: Check

    SiUS281811EB Check 6. Check High Pressure Check CHECK 1 Referring to the Fault Tree Analysis (FTA) shown below, probe the defective points. Stop valve closed Check to be sure the stop valve is open. Local High pipe Bent or crashed pipe pressure Conduct visual checks for pipe conditions.

  • Page 344: Low Pressure Check

    Check SiUS281811EB Low Pressure Check CHECK 2 Referring to the Fault Tree Analysis (FTA) shown below, probe the defective points [In cooling] Defective low pressure Is the pressure value checked with the Service Checker (1.) Defective sensor corresponding to the measurement value of the pressure sensor? compressor Defective outdoor unit Defective...
  • Page 345 SiUS281811EB Check Reference CHECK 7 Refer to page 344. Reference CHECK 8 Refer to page 345. Part 6 Service Diagnosis...

  • Page 346: Superheat Operation Check

    Check SiUS281811EB Superheat Operation Check CHECK 3 Referring to the Fault Tree Analysis (FTA) shown below, probe the defective points. Hot gas circuit clogging Defective hot Defective solenoid gas bypass ←Are the coil resistance and insulation normal? valve coil control Defective solenoid valve body (*1)
  • Page 347 SiUS281811EB Check Reference CHECK 7 Refer to page 344. Reference CHECK 8 Refer to page 345. Part 6 Service Diagnosis...

  • Page 348: Power Transistor Check

    Check SiUS281811EB Power Transistor Check CHECK 4 Perform the following procedures prior to check. (1) Power OFF. (2) Remove all the wiring connected to the PCB where power transistors are mounted on.  Preparing a multimeter in the analog system is [Preparation] ·...

  • Page 349: Refrigerant Overcharge Check

    SiUS281811EB Check Refrigerant Overcharge Check CHECK 6 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 the information below. Diagnosis of overcharge of refrigerant 1.

  • Page 350: Refrigerant Shortage Check

    Check SiUS281811EB Refrigerant Shortage Check CHECK 7 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 the information below. Diagnosis of shortage of refrigerant 1.

  • Page 351: Vacuuming And Dehydration Procedure

    SiUS281811EB Check Vacuuming and Dehydration Procedure CHECK 8 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 described below.

  • Page 352: List Of Inverter-Related Error Codes

    Check SiUS281811EB List of Inverter-Related Error Codes CHECK 9 Code Name Condition for determining error Major cause Instantaneous overcurrent of • Inverter output current exceeds 59.1 A even • Liquid sealing compressor instantaneously. • Defective compressor • Defective inverter PCB Overcurrent of compressor •...

  • Page 353: Concept Of Inverter-Related Error Codes

    SiUS281811EB Check Concept of Inverter-Related Error Codes CHECK 10 Transmission error When transmissions between the microcomputers on the main PCB are not normal Instantaneous overcurrent of compressor (When inverter output current exceeds 59.1 A even instantaneously) Overcurrent of compressor (1) A current of 33.5 A or more continues for a period of consecutive 5 seconds.

  • Page 354: Thermistor Check

    Check SiUS281811EB 6.10 Thermistor Check CHECK 11 Thermistor type of indoor units Indoor heat exchanger Indoor heat exchanger Suction air thermistor Discharge air thermistor (liquid) thermistor (gas) thermistor Model FCQ-TA Type J — Type C FCQ-AA Type A — FHQ-P —...
  • Page 355 SiUS281811EB Check Thermistor temperature Resistance (k) (°C) (°F) Type A Type B Type C Type E –30 –22 363.8 — – 357.9 –25 –13 266.8 — – 263.5 –20 –4 197.8 — – 196.1 –15 148.2 — – 147.4 –10 112.0 111.1 111.8...
  • Page 356 Check SiUS281811EB Thermistor temperature Resistance (k) (°C) (°F) Type G Type J Type K –30 –22 4759 352.1 350.6 –25 –13 3454 261.2 257.4 –20 –4 2534 195.4 191.0 –15 1877 147.3 143.2 –10 1404 111.8 108.4 –5 1059 85.49 82.83 806.5 65.80...

  • Page 357: Pressure Sensor Check

    SiUS281811EB Check 6.11 Pressure Sensor Check CHECK 12 4.15 4.15 Detected Pressure (MPa) = × V – × 0.5 (psi) (kg/cm (MPa) (MPa) = × V – × 0.5 51.0 1 MPa = 145 psi : High pressure (MPa) 45.9 : Low pressure (MPa) High Pressure (P : Output Voltage (High Side) (VDC)

  • Page 358: Broken Wire Check Of The Relay Wires

    Check SiUS281811EB 6.12 Broken Wire Check of the Relay Wires CHECK 15 Procedure for checking indoor-outdoor unit transmission wiring for broken wires (for checking the indoor-outdoor unit transmission wiring of the outdoor unit for broken wires). Turn OFF the power supply to all equipment, short circuit between the indoor-outdoor unit terminal F1 and F2 in the outdoor unit, and then conduct continuity checks between the transmission wirings F1 and F2 of the "Indoor Unit a"...

  • Page 359: Fan Motor Connector Check

    SiUS281811EB Check 6.13 Fan Motor Connector Check CHECK 16 Resistance measuring points and judgment criteria. Indoor Unit FCQ-TA, FAQ-TA, FBQ18/24TB X20A (FCQ-TA, FAQ-TA) X8A (FBQ18/24TB) 1 White 2 Orange 3 Brown 4 Blue 5 — — 6 — — 7 Red Measuring points Judgment criteria 1 - 4...
  • Page 360 Check SiUS281811EB FBQ-P, FBQ30-48TB (1) Measurement of power wire connector. Remove the X1A connector from the fan PCB (A2P) and measure the resistance between the U and V, V and W, and W and U phases of the motor connector (with five conductors) and check that each phase are balanced (within a permissible dispersion range of ±20%).

  • Page 361: Electronic Expansion Valve Coil Check

    SiUS281811EB Check 6.14 Electronic Expansion Valve Coil Check CHECK 18 Measure the connector pin-to-pin resistance and make sure that the resistance value is within the range listed in the table below. Indoor Unit FCQ-TA, FCQ-AA, FBQ-TB, FTQ-TA Orange 1 Red 2 Yellow 3 Black 4 —...
  • Page 362 Check SiUS281811EB FHQ-P, FHQ-M Blue Brown Orange Yellow White Measuring points Judgment criteria 300  1 - 3 150  1 - 5 300  2 - 4 150  2 - 6 Part 6 Service Diagnosis...
  • Page 363 SiUS281811EB Check Outdoor Unit 18/24 class X21A (Y1E) (White) 1 (Yellow) 2 (Orange) 3 (Blue) 4 — (Red) 6 Measuring points Judgment criteria 1 - 6 2 - 6 35-55  3 - 6 4 - 6 30-48 class X21A (Y1E) X22A (Y3E) (Orange) 1 (Red) 2...
  • Page 364 Check SiUS281811EB 6.15 Fan Motor Connector Check for FTQ-TA CHECK 19 CHECKING EMERSON ULTRATECH ECM MOTORS The FTQ-TA models utilize an Emerson, 4-wire variable speed ECM blower motor. The ECM blower motor provides constant CFM. The motor is a serially communicating variable speed motor. Only four wires are required to control the motor: +Vdc, Common, Receive, and Transmit.
  • Page 365 SiUS281811EB Check Power Green Motor Indication(s) Button Action Confirm 24VAC to UltraCheck-EZ tool. If 24VAC Rotating is confirmed, diagnostic tool is inoperable. Blinking Rotating Motor and control/end bell are functioning properly. Rotating Replace motor control/end bell. Check motor (refer to Motor Checks on page 361). Blinking Rotating Replace motor control/end bell;...
  • Page 366 Check SiUS281811EB Electrical Checks - Low Voltage Control Circuits 1. Turn on power to air handler or modular. Warning Line Voltage now present. 2. Check voltage between pins on the 4-wire motor control harness between the motor and control board. 3.

  • Page 367: Motor Checks

    SiUS281811EB Check 7. Locate the 3-circuit connector in the control/end bell. Using an ohmmeter, check the resistance between each terminal in the connector. If the resistance is 1 M or greater, the control/end bell is functioning properly. Replace the control/end bell if the resistance is lower than 1 M. 8.
  • Page 368 SiUS281811EB Part 7 Appendix 1. Wiring Diagrams..................363 1.1 Outdoor Unit ..................... 363 1.2 Indoor Unit....................367 Part 7 Appendix...

  • Page 369: Wiring Diagrams

    SiUS281811EB Wiring Diagrams 1. Wiring Diagrams Outdoor Unit RZR18/24TAVJU, RZQ18/24TAVJU Part 7 Appendix...
  • Page 370 Wiring Diagrams SiUS281811EB RZR18/24TAVJUA, RZQ18/24TAVJUA, RZR18/24TBVJUA, RZQ18/24TBVJUA Part 7 Appendix...
  • Page 371 SiUS281811EB Wiring Diagrams RZR30/36/42/48TAVJU, RZQ30/36/42/48TAVJU Part 7 Appendix...
  • Page 372 Wiring Diagrams SiUS281811EB RZR30/36/42/48TAVJUA, RZQ30/36/42/48TAVJUA, RZR30/36/42/48TBVJUA, RZQ30/36/42/48TBVJUA Part 7 Appendix...
  • Page 373 SiUS281811EB Wiring Diagrams Indoor Unit FCQ18/24/30/36/42/48TAVJU Part 7 Appendix...
  • Page 374 Wiring Diagrams SiUS281811EB BYCQ125BGW1 (Self-Cleaning Decoration Panel for FCQ-TA) Part 7 Appendix...
  • Page 375 SiUS281811EB Wiring Diagrams FCQ18/24/30/36/42/48AAVJU Part 7 Appendix...
  • Page 376 Wiring Diagrams SiUS281811EB BYCQ54EEGFU (Self-Cleaning Decoration Panel for FCQ-AA) Part 7 Appendix...
  • Page 377 SiUS281811EB Wiring Diagrams FHQ18/24/30PVJU, FHQ36/42MVJU Part 7 Appendix...
  • Page 378 Wiring Diagrams SiUS281811EB FAQ18/24TAVJU Part 7 Appendix...
  • Page 379 SiUS281811EB Wiring Diagrams FBQ18/24/30/36/42/48PVJU Part 7 Appendix...
  • Page 380 Wiring Diagrams SiUS281811EB FBQ18/24/30/36/42/48TBVJU Part 7 Appendix...
  • Page 381 SiUS281811EB Wiring Diagrams FTQ18/24/30/36/42/48TAVJUD, FTQ18/24/30/36/42/48TAVJUA Part 7 Appendix...
  • Page 382 Improper installation can result in water or refrigerant leakage, electrical shock, fire or explosion. z Use only those parts and accessories supplied or specified by Daikin. Ask a qualified installer or contractor to install those parts and accessories. Use of unauthorized parts and accessories or improper installation of parts and accessories can result in water or refrigerant leakage, electrical shock, fire or explosion.

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