Daikin SkyAir RZR-TA Series Service Manual
  1. Manuals
  2. Brands
  3. Daikin Manuals
  4. Air Conditioner
  5. SkyAir RZR-TA Series
  6. Service manual

Daikin SkyAir RZR-TA Series Service Manual

Cooling only 60 hz heat pump 60 hz
Hide thumbs Also See for SkyAir RZR-TA Series:
Table of Contents

Advertisement

Quick Links

SiUS281811E
Service
Manual
RZR-TA, RZQ-TA Series
Cooling Only 60 Hz
Heat Pump 60 Hz

Advertisement

Table of Contents
loading

Related Manuals for Daikin SkyAir RZR-TA Series

Summary of Contents for Daikin SkyAir RZR-TA Series

  • Page 1 SiUS281811E Service Manual RZR-TA, RZQ-TA Series Cooling Only 60 Hz Heat Pump 60 Hz...

  • Page 2: Table Of Contents

    SiUS281811E 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 SiUS281811E Part 4 Functions and Control ............72 1. Operation Mode ..................73 2. Basic Control.....................74 2.1 Normal Operation ..................74 2.2 Compressor PI Control................75 2.3 Electronic Expansion Valve PI Control............77 2.4 Cooling Operation Fan Control..............78 3. Special Control..................79 3.1 Startup Control ...................
  • Page 4 SiUS281811E 2.2 Setting Mode and Monitor Mode .............. 139 2.3 Setting Mode 1 ..................140 2.4 Setting Mode 2 ..................142 2.5 Monitor Mode ................... 146 2.6 Setting of Low Noise Operation and Demand Operation ......148 2.7 Setting of Refrigerant Recovery Mode ............. 151 2.8 Setting of Vacuuming Mode ..............
  • Page 5 SiUS281811E 4.17 Drain Level Above Limit ................205 4.18 Capacity Determination Device Abnormality ..........206 4.19 Transmission Abnormality (between Indoor Unit PCB and Fan PCB) ..207 4.20 Blower Motor Communication Error ............209 4.21 Thermistor Abnormality ................210 4.22 Combination Abnormality (between Indoor Unit PCB and Fan PCB)..211 4.23 Blower Motor HP Mismatch..............
  • Page 6 SiUS281811E 5.3 Superheat Operation Check..............263 5.4 Power Transistor Check ................264 5.5 Refrigerant Overcharge Check..............265 5.6 Refrigerant Shortage Check..............266 5.7 Vacuuming and Dehydration Procedure ..........267 5.8 List of Inverter-Related Error Codes............268 5.9 Concept of Inverter-Related Error Codes..........269 5.10 Thermistor Check ..................

  • Page 7: Introduction

    SiUS281811E 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 SiUS281811E 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 SiUS281811E 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 SiUS281811E 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 SiUS281811E 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 SiUS281811E 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

    SiUS281811E 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 SiUS281811E 3. Revision History Month / Year Version Revised contents 04 / 2019 SiUS281811E First edition Introduction...

  • Page 15: Part 1 General Information

    SiUS281811E Part 1 General Information 1. Model Names and Power Supply..............10 1.1 Cooling Only....................10 1.2 Heat Pump ....................11 2. External Appearance.................12 2.1 Indoor Unit....................12 2.2 Outdoor Unit ....................13 2.3 Remote Controller ..................14 3. Specifications ....................15 3.1 Cooling Only....................

  • Page 16: Model Names And Power Supply

    Model Names and Power Supply SiUS281811E 1. Model Names and Power Supply Cooling Only Indoor unit Outdoor unit Power supply intake Ceiling mounted cassette type FCQ18TAVJU RZR18TAVJU (Round flow with sensing) FCQ24TAVJU RZR24TAVJU FCQ30TAVJU RZR30TAVJU FCQ36TAVJU RZR36TAVJU FCQ42TAVJU RZR42TAVJU FCQ48TAVJU RZR48TAVJU Ceiling suspended type FHQ18PVJU...

  • Page 17: Heat Pump

    SiUS281811E Model Names and Power Supply Heat Pump Indoor unit Outdoor unit Power supply intake Ceiling mounted cassette type FCQ18TAVJU RZQ18TAVJU (Round flow with sensing) FCQ24TAVJU RZQ24TAVJU FCQ30TAVJU RZQ30TAVJU FCQ36TAVJU RZQ36TAVJU FCQ42TAVJU RZQ42TAVJU FCQ48TAVJU RZQ48TAVJU Ceiling suspended type FHQ18PVJU RZQ18TAVJU FHQ24PVJU RZQ24TAVJU FHQ30PVJU...

  • Page 18: External Appearance

    External Appearance SiUS281811E 2. External Appearance Indoor Unit Ceiling Mounted Cassette Type (Round Flow with Sensing) FCQ18TAVJU FCQ24TAVJU FCQ30TAVJU FCQ36TAVJU FCQ42TAVJU FCQ48TAVJU Shown with BYCQ125B-W1 Ceiling Suspended Type FHQ18PVJU FHQ24PVJU FHQ30PVJU FHQ36MVJU FHQ42MVJU Wall Mounted Type FAQ18TAVJU FAQ24TAVJU Ceiling Mounted Duct Type (High Static Pressure) FBQ18PVJU FBQ24PVJU FBQ30PVJU...

  • Page 19: Outdoor Unit

    SiUS281811E External Appearance Multi Position Air Handling Unit FTQ18TAVJUD, FTQ18TAVJUA FTQ24TAVJUD, FTQ24TAVJUA FTQ30TAVJUD, FTQ30TAVJUA FTQ36TAVJUD, FTQ36TAVJUA FTQ42TAVJUD, FTQ42TAVJUA FTQ48TAVJUD, FTQ48TAVJUA Outdoor Unit RZR18TAVJU RZR24TAVJU RZQ18TAVJU RZQ24TAVJU RZR30TAVJU RZR36TAVJU RZR42TAVJU RZR48TAVJU RZQ30TAVJU RZQ36TAVJU RZQ42TAVJU RZQ48TAVJU Part 1 General Information...

  • Page 20: Remote Controller

    External Appearance SiUS281811E Remote Controller Wired remote controller BRC1E73 Wireless remote controller BRC7E83 (FHQ) BRC7E818 (FAQ) BRC4C82 (FBQ (1), FTQ) BRC082A43 (FBQ (1)) 1. For FBQ 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 21: Specifications

    SiUS281811E Specifications 3. Specifications Cooling Only 3.1.1 Ceiling Mounted Cassette Type (Round Flow with Sensing) 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) 24,000 (7.0)
  • Page 22 Specifications SiUS281811E 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 23 SiUS281811E Specifications 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 24 Specifications SiUS281811E 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 25 SiUS281811E Specifications 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 26 Specifications SiUS281811E 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 27 SiUS281811E 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 28 Specifications SiUS281811E 3.1.4 Ceiling Mounted Duct Type (High Static Pressure) 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)
  • Page 29 SiUS281811E 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 30 Specifications SiUS281811E 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 31 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 32 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 33 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 34: Heat Pump

    Specifications SiUS281811E Heat Pump 3.2.1 Ceiling Mounted Cassette Type (Round Flow With Sensing) 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 (kW) 18,000 (5.3) 24,000 (7.0)
  • Page 35 SiUS281811E 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 36 Specifications SiUS281811E 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 37 SiUS281811E 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 38 Specifications SiUS281811E 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 39 SiUS281811E 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 40 Specifications SiUS281811E 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 41 SiUS281811E Specifications 3.2.4 Ceiling Mounted Duct Type (High Static Pressure) 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...
  • Page 42 Specifications SiUS281811E 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 43 SiUS281811E Specifications 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 44 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 45 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 46 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 47: Part 2 Refrigerant Circuit

    SiUS281811E Part 2 Refrigerant Circuit 1. Refrigerant Circuit (Piping Diagrams) ............42 1.1 RZR18/24TAVJU, RZQ18/24TAVJU............42 1.2 RZR30/36/42/48TAVJU, RZQ30/36/42/48TAVJU........44 1.3 Indoor Unit....................46 2. Functional Parts Layout ................47 2.1 RZR18/24TAVJU, RZQ18/24TAVJU............47 2.2 RZR30/36/42/48TAVJU, RZQ30/36/42/48TAVJU........49 Part 2 Refrigerant Circuit...

  • Page 48: Refrigerant Circuit (Piping Diagrams)

    Refrigerant Circuit (Piping Diagrams) SiUS281811E 1. Refrigerant Circuit (Piping Diagrams) RZR18/24TAVJU, RZQ18/24TAVJU No. in Electric piping Name Function symbol diagram Inverter compressor Compressor is operated in multi-steps according to Te and Tc. Inverter fan The fan rotation speed is varied by using inverter. Electronic expansion While in heating operation, PI control is applied to keep the outlet superheated valve (Main)
  • Page 49 SiUS281811E Refrigerant Circuit (Piping Diagrams) Part 2 Refrigerant Circuit...

  • Page 50: Rzr30/36/42/48Tavju, Rzq30/36/42/48Tavju

    Refrigerant Circuit (Piping Diagrams) SiUS281811E RZR30/36/42/48TAVJU, RZQ30/36/42/48TAVJU No. in Electric piping Name Function symbol diagram Inverter compressor Compressor is operated in multi-steps according to Te and Tc. Inverter fan The fan rotation speed is varied by using inverter. Electronic expansion While in heating operation, PI control is applied to keep the outlet superheated valve (Main) degree of air heat exchanger constant.
  • Page 51 SiUS281811E Refrigerant Circuit (Piping Diagrams) Part 2 Refrigerant Circuit...

  • Page 52: Indoor Unit

    Refrigerant Circuit (Piping Diagrams) SiUS281811E Indoor Unit Symbol FCQ-TA No. in piping Name Function FHQ-P diagram FBQ-P FTQ-TA FHQ-M FAQ-TA Electronic expansion valve Used for gas superheated degree control while in cooling or subcooled degree control while in heating. Suction air thermistor R1T(1) Used for thermostat control.

  • Page 53: Functional Parts Layout

    SiUS281811E 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) Inverter fan...
  • Page 54 Functional Parts Layout SiUS281811E 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 55: Rzr30/36/42/48Tavju, Rzq30/36/42/48Tavju

    SiUS281811E Functional Parts Layout RZR30/36/42/48TAVJU, RZQ30/36/42/48TAVJU Front view Four way valve coil Inverter fan (M1F) Four way valve coil (Y1S) Thermistor (Suction pipe 2) (R5T) Thermistor (Discharge pipe) (R2T) Inverter fan Low pressure sensor (M2F) (S1NPL) High pressure sensor (S1NPH) High pressure switch (S1PH) Inverter compressor...
  • Page 56 Functional Parts Layout SiUS281811E 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: 1P441643J Part 2 Refrigerant Circuit...

  • Page 57: Part 3 Remote Controller

    SiUS281811E Part 3 Remote Controller 1. Applicable Models ..................52 2. Names and Functions ................53 2.1 Wired Remote Controller................53 2.2 Simplified Remote Controller..............56 2.3 Wireless Remote Controller ............... 57 3. Main/Sub Setting..................59 3.1 Wired Remote Controller (BRC1E73) ............59 3.2 When Wireless Remote Controller is Used Together.........

  • Page 58: Applicable Models

    Applicable Models SiUS281811E 1. Applicable Models Wired remote Simplified remote Wireless remote Indoor unit controller controller controller Ceiling mounted cassette type FCQ-TA — (round flow with sensing) Ceiling suspended type FHQ-P BRC7E83 FHQ-M BRC1E73 BRC2A71 Wall mounted type FAQ-TA BRC7E818 Ceiling mounted duct type BRC4C82 (Fan: 2 steps) FBQ-P...

  • Page 59: Names And Functions

    SiUS281811E Names and Functions 2. Names and Functions Wired Remote Controller 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.
  • Page 60 Names and Functions SiUS281811E 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 61 SiUS281811E 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 62: Simplified Remote Controller

    Names and Functions SiUS281811E 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 63: Wireless Remote Controller

    SiUS281811E 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 64 Names and Functions SiUS281811E 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 65: Main/Sub Setting

    SiUS281811E 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 66: When Wireless Remote Controller Is Used Together

    Main/Sub Setting SiUS281811E 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 67: Address Setting For Wireless Remote Controller

    SiUS281811E 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 68 Address Setting for Wireless Remote Controller SiUS281811E 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 69 SiUS281811E 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 70: Centralized Control Group No. Setting

    Centralized Control Group No. Setting SiUS281811E 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 71 SiUS281811E 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 72: Wireless Remote Controller

    Centralized Control Group No. Setting SiUS281811E 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 73: Service Settings Menu, Maintenance Menu

    SiUS281811E Service Settings Menu, Maintenance Menu 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 74 Service Settings Menu, Maintenance Menu SiUS281811E 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 75 SiUS281811E Service Settings Menu, Maintenance Menu 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 Outdoor unit particular model.) Operation Hours...
  • Page 76 Service Settings Menu, Maintenance Menu SiUS281811E 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 77: Wireless Remote Controller

    SiUS281811E Service Settings Menu, Maintenance Menu 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 78: Part 4 Functions And Control

    SiUS281811E Part 4 Functions and Control 1. Operation Mode ..................73 2. Basic Control.....................74 2.1 Normal Operation ..................74 2.2 Compressor PI Control................75 2.3 Electronic Expansion Valve PI Control............77 2.4 Cooling Operation Fan Control..............78 3. Special Control..................79 3.1 Startup Control ................... 79 3.2 Oil Return Control..................

  • Page 79: Operation Mode

    SiUS281811E 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 80: Basic Control

    Basic Control SiUS281811E 2. Basic Control Normal Operation Cooling Operation Electric Symbol Outdoor unit Operation Remarks 18/24 30/36/42/48 actuator class class Compressor Compressor Used for high pressure PI control protection control, low pressure protection control, discharge pipe temperature protection control, and compressor operating frequency upper limit control with inverter protection control.

  • Page 81: Compressor Pi Control

    SiUS281811E Basic Control Compressor PI Control Low pressure equivalent saturation temperature TeS: Target Te value (Varies depending on Te setting, operating frequency, etc.) High pressure equivalent saturation temperature TcS: Target Tc value (Varies depending on Tc setting, operating frequency, etc.) 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.
  • Page 82 Basic Control SiUS281811E 18/24 class 30/36/42/48 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 83: Electronic Expansion Valve Pi Control

    SiUS281811E 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 superheated degree (SH) at constant during heating operation, thus making maximum use of the outdoor heat exchanger (evaporator).

  • Page 84: Cooling Operation Fan Control

    Basic Control SiUS281811E Cooling Operation Fan Control In cooling operation with low outdoor air temperature, this control is used to provide an adequate amount of circulation air with liquid pressure secured by high pressure control from the outdoor fan. Furthermore, when outdoor temperature ≥ 20°C (68°F), the compressor will run in Step 7 or higher. When outdoor temperature ≥...

  • Page 85: Special Control

    SiUS281811E Special Control 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 86 Special Control SiUS281811E 3.1.2 Startup Control in Heating Electric Symbol Startup control Outdoor unit Pressure equalization 18/24 30/36/42/48 actuator control prior to startup STEP 1 STEP 2 class class Compressor 0 Hz Minimum Increases 2 steps every 20 frequency seconds from minimum frequency until Pc –...

  • Page 87: Oil Return Control

    SiUS281811E Special Control 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. 3.2.1 Oil Return Control in Cooling HTdi : Compressor discharge pipe temperature (Tdi) compensated with outdoor air temperature Pe : Low pressure sensor detection value Tc: High pressure equivalent saturation temperature...
  • Page 88 Special Control SiUS281811E 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 conditions Referring to the set conditions for the following items, start oil return control in heating.

  • Page 89: Defrost Control

    SiUS281811E Special Control 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 90: Pump Down Residual Control

    Special Control SiUS281811E 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 91: Restart Standby

    SiUS281811E Special Control 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 30/36/42/48 class Compressor Outdoor fan...

  • Page 92: Protection Control

    Protection Control SiUS281811E 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 93: Low Pressure Protection Control

    SiUS281811E Protection Control Heating operation High pressure drop Pc > 3.04 MPa (441 psi) High pressure not limited Pc < 2.89 MPa (419 psi) High pressure limited Compressor upper limit frequency: 1-step down from current compressor frequency After 10 sec. Pc >...
  • Page 94 Protection Control SiUS281811E Heating operation Pe: Low pressure sensor detection value Pe < 0.17 MPa (24.7 psi) Low pressure not limited • Pe > 0.09 MPa (13.1 psi) • Ts – Teg < 8˚C (14.4˚F) & • Pe > 0.06 MPa (8.7 psi) Low pressure limited Compressor upper limit frequency: 3-step down from...

  • Page 95: Discharge Pipe Temperature Protection Control

    SiUS281811E 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 superheated degree.

  • Page 96: Inverter Protection Control

    Protection Control SiUS281811E 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 97 SiUS281811E 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 98: Other Control

    Other Control SiUS281811E 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 99: Outline Of Control (Indoor Unit)

    SiUS281811E 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 100 Outline of Control (Indoor Unit) SiUS281811E Suction air thermistor (1) is used for temperatures from 27°C (81°F) to 30°C (86°F) (E  F).  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...

  • Page 101: Thermostat Control

    SiUS281811E Outline of Control (Indoor Unit) Suction air thermistor (1) is used for temperatures from 23°C (73°F) to 18°C (64°F) (B  A). Note(s) 1. For FTQ: Remote sensor (Optional accessory) Thermostat Control 6.2.1 Without Optional Infrared Presence/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 102 Outline of Control (Indoor Unit) SiUS281811E 6.2.2 With Optional Infrared Presence/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 ·...

  • Page 103: Thermostat Control With Operation Mode Set To Auto

    SiUS281811E 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. Second code No.

  • Page 104: List Of Swing Flap Operations

    Outline of Control (Indoor Unit) SiUS281811E List of Swing Flap Operations Swing flaps operate as shown in table below. Flap Operation mode Hot start from defrost Swing Horizontal Horizontal Horizontal operation Airflow direction set Horizontal Horizontal Horizontal Defrost operation Swing Horizontal Horizontal Horizontal...

  • Page 105: Hot Start Control (In Heating Operation Only)

    SiUS281811E 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 106: Louver Control For Preventing Ceiling Dirt (Fcq Models Only)

    Outline of Control (Indoor Unit) SiUS281811E 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 107: Drain Pump Control

    SiUS281811E 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 108 Outline of Control (Indoor Unit) SiUS281811E 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 109: Freeze-Up Prevention

    SiUS281811E 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 110 Outline of Control (Indoor Unit) SiUS281811E 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 111: Heater Control (Except Ftq-Ta Models)

    SiUS281811E 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 112: Heater Control (Ftq-Ta Models)

    Outline of Control (Indoor Unit) SiUS281811E 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 113 SiUS281811E Outline of Control (Indoor Unit) 6.10.1 Auxiliary Electric Heater Control If heating is insufficient in heat pump system alone, an electric heater is to be used as the auxiliary heater. The following shows the ON/OFF conditions for the electric heater. Heater not allowed •...
  • Page 114 Outline of Control (Indoor Unit) SiUS281811E 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 115 SiUS281811E Outline of Control (Indoor Unit) 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 116: 3-Step Thermostat Processing (Ftq-Ta Models)

    Outline of Control (Indoor Unit) SiUS281811E 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 106.

  • Page 117: Fan Control (Heater Residual) (Ftq-Ta Models)

    SiUS281811E Outline of Control (Indoor Unit) 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 118 Outline of Control (Indoor Unit) SiUS281811E 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 119: Part 5 Field Settings And Test Operation

    SiUS281811E Part 5 Field Settings and Test Operation 1. Field Setting from Remote Controller............114 1.1 Wired Remote Controller................114 1.2 Simplified Remote Controller..............116 1.3 Wireless Remote Controller ..............117 1.4 List of Field Settings for Indoor Unit ............118 1.5 Details of Field Settings for Indoor Unit............

  • Page 120: Field Setting From Remote Controller

    Field Setting from Remote Controller SiUS281811E 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 121 SiUS281811E Field Setting from Remote Controller 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 122: Simplified Remote Controller

    Field Setting from Remote Controller SiUS281811E 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 123: Wireless Remote Controller

    SiUS281811E 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 124: List Of Field Settings For Indoor Unit

    Field Setting from Remote Controller SiUS281811E List of Field Settings for Indoor Unit : Factory setting Mode First Second Code No. Page Code Description Reference (2) Filter Ultra long life Approx. Approx. cleaning filter 10,000 5,000 sign interval hrs. hrs. Long life filter Approx.
  • Page 125 SiUS281811E Field Setting from Remote Controller Mode First Second Code No. Page Code Description Reference (2) Optional accessories output selection (field selection of Refer to the page on the right for details. output for adaptor for wiring) External ON/OFF input (Set when ON/OFF is to be Refer to the page on the right for details.
  • Page 126 Field Setting from Remote Controller SiUS281811E Note(s) 1. Settings are made simultaneously for the entire group, however, if you select the mode No. inside parentheses, you can also set by each individual unit. Setting changes however cannot be checked except in the individual mode for those in parentheses. 2.
  • Page 127 SiUS281811E Field Setting from Remote Controller Applicable Range of Field Settings Mode First Code No. Description of Setting Filter cleaning sign interval     ― Filter sign setting ― ― ― ―  Filter type  ― ― ―...

  • Page 128: Details Of Field Settings For Indoor Unit

    Field Setting from Remote Controller SiUS281811E 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 129 SiUS281811E Field Setting from Remote Controller When the Second Code No. is set to 02, room temperature is controlled by the remote sensor thermistor. When the Second Code No. is set to 03, room temperature is controlled by the remote controller thermistor.
  • Page 130 Field Setting from Remote Controller SiUS281811E First code No. 6. : 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...
  • Page 131 SiUS281811E 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 Second Code No.
  • Page 132 Field Setting from Remote Controller SiUS281811E 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 133 SiUS281811E 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.  FBQ-P The volume of blow-off air is automatically adjusted to the rated quantity. Make settings before performing the test operation of the outdoor unit.
  • Page 134 Field Setting from Remote Controller SiUS281811E 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 135 SiUS281811E Field Setting from Remote Controller 1.5.13 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 136 Field Setting from Remote Controller SiUS281811E 1.5.17 Automatic Mode Differential This setting makes it possible to change differential values for mode selection while in automatic operation mode, only when the wireless remote controller or any central remote controller is connected. : Factory setting Second Code No.
  • Page 137 SiUS281811E Field Setting from Remote Controller 1.5.20 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 : Factory setting Ceiling Height First Mode Second...
  • Page 138 Field Setting from Remote Controller SiUS281811E 1.5.22 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 139 SiUS281811E Field Setting from Remote Controller 1.5.25 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 140 Field Setting from Remote Controller SiUS281811E 1.5.29 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 141 SiUS281811E Field Setting from Remote Controller 1.5.33 Key-lock Pattern Settings For BRC1E series only Setting of key-lock pattern for the remote controller. : Factory setting Mode First Code Second Code Contents 01 No operation allowed (Cancel procedure is displayed). No operation allowed (Cancel procedure is not displayed). No menu operation is allowed.
  • Page 142 Field Setting from Remote Controller SiUS281811E 1.5.37 Access Permission Level Setting For BRC1E series only There are 2 levels as follows:  Level 2: The following buttons are selectable to be disable or enable.  Level 3: No buttons are selectable and only On/Off button is available. Button Level 2 Level 3...

  • Page 143: Operation Control Mode

    SiUS281811E 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. (Refer to information in the next page.) Centralized controller is normally available for operations.

  • Page 144: Field Settings From Outdoor Unit

    Field Settings from Outdoor Unit SiUS281811E 2. Field Settings from Outdoor Unit Capacity Setting Caution Be sure to carry out capacity setting after changing the main PCB (A1P) to spare PCB. (for RZR30/36/42/48TAVJU and RZQ30/36/42/48TAVJU only) Attach the capacity setting adaptor corresponding to capacity class to connector X51A. Capacity setting is not required for RZR18/24TAVJU and RZQ18/24TAVJU.

  • Page 145: Setting Mode And Monitor Mode

    SiUS281811E 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 146: Setting Mode 1

    Field Settings from Outdoor Unit SiUS281811E 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 COOL/HEAT selection (IND) outdoor unit (factory setting).
  • Page 147 SiUS281811E Field Settings from Outdoor Unit Procedure for changing COOL/HEAT selection setting Setting mode 1 is the initial status k ON (normal). In case of other status, h OFF press the MODE (BS1) button one l Blink time and return to the setting mode 1. Setting (displaying) item COOL/HEAT select MODE...

  • Page 148: Setting Mode 2

    Field Settings from Outdoor Unit SiUS281811E 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 Used to conduct test operation without making changes to the Test operation settings...
  • Page 149 SiUS281811E 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...
  • Page 150 Field Settings from Outdoor Unit SiUS281811E 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 k Level 1 (outdoor fan with 6 step or lower) k h h h h k h ∗...
  • Page 151 SiUS281811E 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 152: Monitor Mode

    Field Settings from Outdoor Unit SiUS281811E 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 153 SiUS281811E 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 154: Setting Of Low Noise Operation And Demand Operation

    Field Settings from Outdoor Unit SiUS281811E 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 155 SiUS281811E 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 156 Field Settings from Outdoor Unit SiUS281811E : 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 157: Setting Of Refrigerant Recovery Mode

    SiUS281811E 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 procedure (1) In setting mode 2 with units in stop mode, set the item No.21 (refrigerant recovery / vacuuming mode) to ON.

  • Page 158: Check Operation

    Field Settings from Outdoor Unit SiUS281811E 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 159: Setting Of Auxiliary Heater Control

    SiUS281811E Field Settings from Outdoor Unit 2.10 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 160: Setting Of Heat Pump Lockout And Emergency Heat Mode

    Field Settings from Outdoor Unit SiUS281811E 2.11 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 161 SiUS281811E 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 162: Test Operation

    Test Operation SiUS281811E 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 163: Test Operation

    SiUS281811E 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 164 Test Operation SiUS281811E  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 165 SiUS281811E Test Operation 2. For normal operation Set the master unit (the indoor unit with cooling and heating option rights) For wired remote controller  After test operation is completed, the symbol MASTER CONTROLLED blinks on all connected remote controllers. ...

  • Page 166: Error Codes And Corresponding Measures

    Test Operation SiUS281811E 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 167 SiUS281811E 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 168: When Turning On Power First Time

    Test Operation SiUS281811E 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 169: Part 6 Service Diagnosis

    SiUS281811E Part 6 Service Diagnosis 1. Servicing Items to be Confirmed .............166 1.1 Troubleshooting..................166 1.2 Precautions for Maintenance..............166 1.3 Refrigerant Properties (R-410A)............... 168 2. Symptom-based Troubleshooting ............169 2.1 Indoor Unit Overall ................... 169 2.2 With Optional Infrared Presence/Floor Sensor......... 172 3.
  • Page 170 SiUS281811E 4.29 Activation of High Pressure Switch ............222 4.30 Activation of Low Pressure Sensor ............224 4.31 Inverter Compressor Motor Lock.............. 226 4.32 Outdoor Fan Motor Abnormality ............... 228 4.33 Electronic Expansion Valve Coil Abnormality........... 230 4.34 Discharge Pipe Temperature Abnormality ..........231 4.35 Refrigerant Overcharged................
  • Page 171 SiUS281811E 5.15 Fan Motor Connector Check for FTQ-TA ..........280 Part 6 Service Diagnosis...

  • Page 172: Servicing Items To Be Confirmed

    Servicing Items to be Confirmed SiUS281811E 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 173 SiUS281811E 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 174: Refrigerant Properties (R-410A)

    Servicing Items to be Confirmed SiUS281811E 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 175: Symptom-Based Troubleshooting

    SiUS281811E 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 176 Symptom-based Troubleshooting SiUS281811E Symptom Supposed Cause Countermeasure The system The system stops and If the operation lamp on the Normal operation. The system does not immediately restarts remote controller turns ON, the will automatically start operate. operation. system will be normal. These operation after a lapse of five symptoms indicate that the minutes.
  • Page 177 SiUS281811E Symptom-based Troubleshooting Symptom Supposed Cause Countermeasure 10 A white mist Indoor unit Uneven temperature Clean the inside of the indoor comes out from In cooling operation, the distribution due to heavy stain unit. the system. ambient humidity is high. of the inside of the indoor unit (This indoor unit is installed in a place with much oil or...

  • Page 178: With Optional Infrared Presence/Floor Sensor

    Symptom-based Troubleshooting SiUS281811E Symptom Supposed Cause Countermeasure 17 The outdoor While stopping operation The reason is that the Normal operation. unit gets hot. compressor is warmed up to provide smooth startup of the system. 18 The system The system is in dry The reason is that the dry Change the system to cooling does not cool...
  • Page 179 SiUS281811E Symptom-based Troubleshooting Error diagnosis of "Louver operation different from setting" Is the individual Normal airflow set? Reset (Cancel) individual airflow. Is the Is the automatic draft prevention airflow direction set to Normal function "enabled"? automatic? Automatic draft prevention function switches flap to horizontal position when human...

  • Page 180: Troubleshooting With Remote Controller

    Troubleshooting with Remote Controller SiUS281811E 3. Troubleshooting with 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 181: Wireless Remote Controller

    SiUS281811E Troubleshooting with Remote Controller Wireless Remote Controller If unit stops due to an error, the operation indicating LED on the signal receiving part of indoor unit blinks. The error code can be determined by following the procedure described below. (The error code is displayed when an operation error has occurred.
  • Page 182 Troubleshooting with Remote Controller SiUS281811E  The lower digit of the code changes as shown below. 0 1 2 3 4 5 6 7 8 9 A H C J E F "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 183: Troubleshooting By Error Codes

    SiUS281811E Troubleshooting by Error Codes 4. 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 184 Troubleshooting by Error Codes SiUS281811E Operation Reference Error code Description lamp Page Outdoor main PCB abnormality Activation of high pressure switch Activation of low pressure sensor Inverter 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 185: Error Codes - Sub Codes

    SiUS281811E Troubleshooting by Error Codes Error Codes - Sub Codes If an error code like the one shown below is displayed when the navigation remote controller (BRC1E series) is in use, make a detailed diagnosis. 4.2.1 Indoor Unit Troubleshooting Error code Description of error Description of diagnosis A0 - 01...
  • Page 186 Troubleshooting by Error Codes SiUS281811E Troubleshooting Error code Description of error Description of diagnosis U4 - 01 Indoor-outdoor transmission error Refer to the U4 flowchart. Refrigerant type error The type of refrigerant used for the indoor unit is different from UA - 13 that used for the outdoor unit.

  • Page 187: Error Code Indication By Outdoor Unit Pcb

    SiUS281811E Troubleshooting by Error Codes 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 inverter compressor lock...
  • Page 188 Troubleshooting by Error Codes SiUS281811E 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 189 SiUS281811E Troubleshooting by Error Codes 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 Refrigerant shortage...
  • Page 190 Troubleshooting by Error Codes SiUS281811E 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 191: External Protection Device Abnormality (Except Ftq-Ta)

    SiUS281811E 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 192: External Protection Device Abnormality (Ftq-Ta Only)

    Troubleshooting by Error Codes SiUS281811E 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 193: Indoor Unit Pcb Abnormality

    SiUS281811E 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 194: Drain Level Control System (S1L) Abnormality

    Troubleshooting by Error Codes SiUS281811E Drain Level Control System (S1L) Abnormality Error Code Applicable FCQ-TA, FBQ-P 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 195 SiUS281811E 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 196: Indoor Fan Motor (M1F) Lock, Overload

    Troubleshooting by Error Codes SiUS281811E Indoor Fan Motor (M1F) Lock, Overload Error Code Applicable FCQ-TA, FAQ-TA 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 197 SiUS281811E 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 matter Remove the foreign matter.

  • Page 198: Indoor Fan Motor Abnormality

    Troubleshooting by Error Codes SiUS281811E Indoor Fan Motor Abnormality 4.9.1 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...
  • Page 199 SiUS281811E Troubleshooting by Error Codes 4.9.2 Indoor Fan Motor Abnormality (FBQ-P Models) Error Code Applicable FBQ-P 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 200 Troubleshooting by Error Codes SiUS281811E 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 201 SiUS281811E 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 202: Blower Motor Not Running

    Troubleshooting by Error Codes SiUS281811E 4.10 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 203: Indoor Fan Motor Status Abnormality

    SiUS281811E Troubleshooting by Error Codes 4.11 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 204: Low Indoor Airflow

    Troubleshooting by Error Codes SiUS281811E 4.12 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 205: Swing Flap Motor Abnormality

    SiUS281811E Troubleshooting by Error Codes 4.13 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 206 Troubleshooting by Error Codes SiUS281811E 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 207: Power Supply Voltage Abnormality

    SiUS281811E Troubleshooting by Error Codes 4.14 Power Supply Voltage Abnormality Error Code Applicable FBQ-P 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 208: Blower Motor Stops For Over/Under Voltage

    Troubleshooting by Error Codes SiUS281811E 4.15 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 209: Electronic Expansion Valve Coil Abnormality, Dust Clogging

    SiUS281811E Troubleshooting by Error Codes 4.16 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 210 Troubleshooting by Error Codes SiUS281811E Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Power is supplied. Replace the electronic expansion valve main body. Electronic expansion valve is Shut the power supply OFF after connected to X7A connection and then restart.

  • Page 211: Drain Level Above Limit

    SiUS281811E Troubleshooting by Error Codes 4.17 Drain Level Above Limit Error Code Applicable FCQ-TA, FBQ-P 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. Error code is displayed but the system operates continuously.

  • Page 212: Capacity Determination Device Abnormality

    Troubleshooting by Error Codes SiUS281811E 4.18 Capacity Determination Device Abnormality 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 213: Transmission Abnormality (Between Indoor Unit Pcb And Fan Pcb)

    SiUS281811E Troubleshooting by Error Codes 4.19 Transmission Abnormality (between Indoor Unit PCB and Fan PCB) Error Code Applicable FBQ-P Models Method of Error Transmission conditions between the indoor unit main PCB (A1P) and fan PCB (A2P) are checked Detection via microcomputer. Error Decision Normal transmission is not carried out for a certain duration.
  • Page 214 Troubleshooting by Error Codes SiUS281811E Note(s) 1. Pull out and insert the connector once and check it is absolutely connected. 2. Method to check transmission part of indoor unit main PCB. (1) Turn OFF the power and remove the connector X70A of indoor unit main PCB (A1P).

  • Page 215: Blower Motor Communication Error

    SiUS281811E Troubleshooting by Error Codes 4.20 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 216: Thermistor Abnormality

    Troubleshooting by Error Codes SiUS281811E 4.21 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 217: Combination Abnormality (Between Indoor Unit Pcb And Fan Pcb)

    SiUS281811E Troubleshooting by Error Codes 4.22 Combination Abnormality (between Indoor Unit PCB and Fan PCB) Error Code Applicable FBQ-P 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 218: Blower Motor Hp Mismatch

    Troubleshooting by Error Codes SiUS281811E 4.23 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 219: Indoor Blower Does Not Have Required Parameters To Function

    SiUS281811E Troubleshooting by Error Codes 4.24 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 220: Remote Sensor Abnormality

    Troubleshooting by Error Codes SiUS281811E 4.25 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 221: Infrared Presence/Floor Sensor Error

    SiUS281811E Troubleshooting by Error Codes 4.26 Infrared Presence/Floor Sensor Error Error Code Applicable FCQ-TA 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 222 Troubleshooting by Error Codes SiUS281811E 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 (A4P) and the connector X2A on A2P normal? Is the connection of the Connect the connector correctly.
  • Page 223 SiUS281811E 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 (A3P) and the connector X2A on A2P normal? Is the connection of the Connect the connector correctly.
  • Page 224 Troubleshooting by Error Codes SiUS281811E 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 (A3P) and the connector X2A on A2P normal? Is the connection of the Connect the connector correctly.
  • Page 225 SiUS281811E 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 (A3P) and the connector X2A on A2P normal? Is the connection of the Connect the connector correctly.

  • Page 226: Remote Controller Thermistor Abnormality

    Troubleshooting by Error Codes SiUS281811E 4.27 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 227: Outdoor Main Pcb Abnormality

    SiUS281811E Troubleshooting by Error Codes 4.28 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 228: Activation Of High Pressure Switch

    Troubleshooting by Error Codes SiUS281811E 4.29 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 229 SiUS281811E 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 230: Activation Of Low Pressure Sensor

    Troubleshooting by Error Codes SiUS281811E 4.30 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 231 SiUS281811E 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? Is the indoor unit failing? (Does the remote controller Eliminate the indoor unit error.

  • Page 232: Inverter Compressor Motor Lock

    Troubleshooting by Error Codes SiUS281811E 4.31 Inverter 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 inverter compressor motor does not start up even in forced Conditions...
  • Page 233 SiUS281811E 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 234: Outdoor Fan Motor Abnormality

    Troubleshooting by Error Codes SiUS281811E 4.32 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 235 SiUS281811E 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 236: Electronic Expansion Valve Coil Abnormality

    Troubleshooting by Error Codes SiUS281811E 4.33 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 237: Discharge Pipe Temperature Abnormality

    SiUS281811E Troubleshooting by Error Codes 4.34 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 238: Refrigerant Overcharged

    Troubleshooting by Error Codes SiUS281811E 4.35 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 239: Thermistor Abnormality

    SiUS281811E Troubleshooting by Error Codes 4.36 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 240: High Pressure Sensor Abnormality

    Troubleshooting by Error Codes SiUS281811E 4.37 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 241: Low Pressure Sensor Abnormality

    SiUS281811E Troubleshooting by Error Codes 4.38 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 242: Pcb (For Inverter Compressor) Abnormality

    Troubleshooting by Error Codes SiUS281811E 4.39 PCB (for Inverter Compressor) 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 243: Radiation Fin Temperature Rise Abnormality

    SiUS281811E Troubleshooting by Error Codes 4.40 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 244: Inverter Compressor Instantaneous Overcurrent

    Troubleshooting by Error Codes SiUS281811E 4.41 Inverter 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 245: Inverter Compressor Overcurrent

    SiUS281811E Troubleshooting by Error Codes 4.42 Inverter 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 ...

  • Page 246: Inverter Compressor Startup Abnormality

    Troubleshooting by Error Codes SiUS281811E 4.43 Inverter 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 247: Transmission Error (Between Microcomputers On The Outdoor Main Pcb)

    SiUS281811E Troubleshooting by Error Codes 4.44 Transmission Error (Between Microcomputers on the Outdoor 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 248: Inverter Circuit Capacitor High Voltage

    Troubleshooting by Error Codes SiUS281811E 4.45 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 249: Radiation Fin Thermistor Abnormality

    SiUS281811E Troubleshooting by Error Codes 4.46 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 250: Refrigerant Shortage

    Troubleshooting by Error Codes SiUS281811E 4.47 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 251 SiUS281811E 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 252: Power Supply Insufficient Or Instantaneous Abnormality

    Troubleshooting by Error Codes SiUS281811E 4.48 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 253 SiUS281811E 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 L1 and L2, Calibrate the power voltage. L2 and L3, and L1 and L3 within If L2 and Phase N are disconnected, 208 V –10% to 230 V replace the distribution box.

  • Page 254: Check Operation Not Executed

    Troubleshooting by Error Codes SiUS281811E 4.49 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 255: Transmission Error Between Indoor Units And Outdoor Units

    SiUS281811E Troubleshooting by Error Codes 4.50 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 256 Troubleshooting by Error Codes SiUS281811E 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 257: Transmission Error Between Remote Controller And Indoor Unit

    SiUS281811E Troubleshooting by Error Codes 4.51 Transmission Error between Remote Controller and Indoor Unit 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 258: Transmission Error Between Main And Sub Remote Controllers

    Troubleshooting by Error Codes SiUS281811E 4.52 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 259: Transmission Error Between Indoor And Outdoor Units In The Same System

    SiUS281811E Troubleshooting by Error Codes 4.53 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 260: Improper Combination Of Indoor And Outdoor Units, Indoor Units And Remote Controller

    Troubleshooting by Error Codes SiUS281811E 4.54 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 261 SiUS281811E 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 262: Incorrect Electric Heater Capacity Setting

    Troubleshooting by Error Codes SiUS281811E 4.55 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 263: Address Duplication Of Centralized Controller

    SiUS281811E Troubleshooting by Error Codes 4.56 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 264: Transmission Error Between Centralized Controller And Indoor Unit

    Troubleshooting by Error Codes SiUS281811E 4.57 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 265: System Not Set

    SiUS281811E Troubleshooting by Error Codes 4.58 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 266: System Abnormality, Refrigerant System Address Undefined

    Troubleshooting by Error Codes SiUS281811E 4.59 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 267: Check

    SiUS281811E Check 5. Check High Pressure Check CHECK 1 Referring to the Fault Tree Analysis (FTA) shown below, probe the defective points. ←Check to be sure the stop valve is open. Stop valve closed Local High pipe Bent or crushed pipe ←Conduct visual checks for pipe conditions.

  • Page 268: Low Pressure Check

    Check SiUS281811E 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.) sensor Defective corresponding to the measurement value of the pressure sensor? compressor Defective Defective main PCB...

  • Page 269: Superheat Operation Check

    SiUS281811E Check 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 270: Power Transistor Check

    Check SiUS281811E 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 271: Refrigerant Overcharge Check

    SiUS281811E 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 272: Refrigerant Shortage Check

    Check SiUS281811E 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 273: Vacuuming And Dehydration Procedure

    SiUS281811E 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 274: List Of Inverter-Related Error Codes

    Check SiUS281811E 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 • Liquid sealing inverter compressor even instantaneously. • Defective compressor • Defective inverter PCB Overcurrent of inverter •...

  • Page 275: Concept Of Inverter-Related Error Codes

    SiUS281811E 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 inverter compressor (When inverter output current exceeds 59.1 A even instantaneously) Overcurrent of inverter compressor (1) A current of 33.5 A or more continues for a period of consecutive 5 seconds.

  • Page 276: Thermistor Check

    Check SiUS281811E 5.10 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 C – FHQ-P – FHQ-M Type J – Type B Type A FAQ-TA –...
  • Page 277 SiUS281811E Check Thermistor temperature Resistance (k) (°C) (°F) Type A Type B Type C Type E –30 –22 363.8 361.7719 – 362.4862 –25 –13 266.8 265.4704 – 265.9943 –20 –4 197.8 196.9198 – 197.3083 –15 148.2 147.5687 – 147.8597 –10 112.0 111.6578 111.8...
  • Page 278 Check SiUS281811E Thermistor temperature Resistance (k) (°C) (°F) Type F Type G Type J Type K –30 –22 354.1 4759 359.8518 350.6 –25 –13 259.7 3454 265.0699 257.4 –20 –4 192.6 2534 197.1476 191.0 –15 144.2 1877 147.7348 143.2 –10 109.1 1404 111.7984...

  • Page 279: Pressure Sensor Check

    SiUS281811E Check 5.11 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 280: Broken Wire Check Of The Relay Wires

    Check SiUS281811E 5.12 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 281: Fan Motor Connector Check

    SiUS281811E Check 5.13 Fan Motor Connector Check CHECK 16 FCQ-TA, FAQ-TA Resistance measuring points and judgment criteria. X20A 1 White 2 Orange 3 Brown 4 Blue 5 — — 6 — — 7 Red Measuring points Judgment criteria 1 - 4 2 - 4 1 ...
  • Page 282 Check SiUS281811E FBQ-P (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 283: Electronic Expansion Valve Coil Check

    SiUS281811E Check 5.14 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. FCQ-TA, FTQ-TA Orange 1 Red 2 Yellow 3 Black 4 —...
  • Page 284 Check SiUS281811E 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 RZR18/24TAVJU RZQ18/24TAVJU X21A (Y1E) (White) 1 (Yellow) 2 (Orange) 3 (Blue) 4 —...
  • Page 285 SiUS281811E Check RZR30/36/42/48TAVJU RZQ30/36/42/48TAVJU X21A (Y1E) X22A (Y3E) (Orange) 1 (Red) 2 (Yellow) 3 (Black) 4 Com-A[+] (Gray) 5 COM-B[+] (White) 6 Measuring points Judgment criteria 1 - 6 2 - 5 35-55  3 - 6 4 - 5 Part 6 Service Diagnosis...

  • Page 286: Fan Motor Connector Check For Ftq-Ta

    Check SiUS281811E 5.15 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 287 SiUS281811E 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 283). Blinking Rotating Replace motor control/end bell;...
  • Page 288 Check SiUS281811E 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 289 SiUS281811E 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 100  or greater, the control/end bell is functioning properly. Replace the control/end bell if the resistance is lower than 100 . 8.

  • Page 290: Part 7 Appendix

    SiUS281811E Part 7 Appendix 1. Wiring Diagrams..................285 1.1 Outdoor Unit ..................... 285 1.2 Indoor Unit....................287 Part 7 Appendix...

  • Page 291: Wiring Diagrams

    SiUS281811E Wiring Diagrams 1. Wiring Diagrams Outdoor Unit RZR18/24TAVJU, RZQ18/24TAVJU Part 7 Appendix...
  • Page 292 Wiring Diagrams SiUS281811E RZR30/36/42/48TAVJU, RZQ30/36/42/48TAVJU Part 7 Appendix...

  • Page 293: Indoor Unit

    SiUS281811E Wiring Diagrams Indoor Unit FCQ18/24/30/36/42/48TAVJU Part 7 Appendix...
  • Page 294 Wiring Diagrams SiUS281811E FHQ18/24/30PVJU, FHQ36/42MVJU Part 7 Appendix...
  • Page 295 SiUS281811E Wiring Diagrams FAQ18/24TAVJU Part 7 Appendix...
  • Page 296 Wiring Diagrams SiUS281811E FBQ18/24/30/36/42/48PVJU Part 7 Appendix...
  • Page 297 SiUS281811E Wiring Diagrams FTQ18/24/30/36/42/48TAVJUD, FTQ18/24/30/36/42/48TAVJUA 208/230 (SEE NOTE 4) GROUND LUG HEATER KIT (SEE NOTE 5) DISCONNECT SWITCH WIRING INSTALLING AUX ALARM (ALARM) (SEE NOTE 6) (SEE NOTE 1) (SEE NOTE 1) 24VAC 24VAC RELAY IN (ACC-IN) HEATER KIT RELAY OUT (A1P) OUTPUT (ACC-OUT)
  • Page 298 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.

This manual is also suitable for:

Skyair rzq-ta seriesSkyair fbq seriesSkyair fcq seriesSkyair fhq seriesSkyair ftq seriesSkyair fcq18tavju ... Show all

Table of Contents