Daikin VRVIII-S Service Manual
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Daikin VRVIII-S Service Manual

Vrv iii-s r-410a heat pump 50z
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SiENBE34-703
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Summary of Contents for Daikin VRVIII-S

  • Page 1 SiENBE34-703 Service Manual Basic Training Manual R-410A Heat Pump 50Hz...

  • Page 2: Table Of Contents

    SiENBE34-703 R-410A Heat Pump 50Hz 1. Introduction ................... vi 1.1 Safety Cautions ..................vi 1.2 PREFACE ....................x Part 1 General Information ............1 1. Model Names of Indoor/Outdoor Units............2 2. External Appearance................3 2.1 Indoor Units ....................3 3. Capacity Range..................4 Part 2 Specifications ..............5 1.
  • Page 3 SiENBE34-703 4. Protection Control .................52 4.1 High Pressure Protection Control............52 4.2 Low Pressure Protection Control............53 4.3 Discharge Pipe Protection Control ............54 4.4 Inverter Protection Control ..............55 5. Other Control..................56 5.1 Demand Operation .................56 5.2 Heating Operation Prohibition ..............56 6. Outline of Control (Indoor Unit) .............57 6.1 Drain Pump Control................57 6.2 Louver Control for Preventing Ceiling Dirt..........59 6.3 Thermostat Sensor in remote control .............60...
  • Page 4 SiENBE34-703 3.14 “E1” Outdoor Unit: PC Board Defect ............138 3.15 “E3” Outdoor Unit: Actuation of High Pressure Switch ......139 3.16 “E4” Outdoor Unit: Actuation of Low Pressure Sensor ......141 3.17 “E5” Inverter Compressor Motor Lock ...........143 3.18 “E7” Malfunction of Outdoor Unit Fan Motor..........144 3.19 “E9”...
  • Page 5 SiENBE34-703 4.5 “MC” Address Duplication, Improper Setting ..........186 5. Troubleshooting by Indication on the Unified ON/OFF Control...187 5.1 Operation Lamp Blinks .................187 5.2 Display “Under Host Computer Integrate Control” Blinks (Repeats Single Blink)................189 5.3 Display “Under Host Computer Integrate Control” Blinks (Repeats Double Blink) ................192 Part 8 Appendix.................

  • Page 6: Introduction

    SiENBE34-703 Introduction 1. Introduction Safety Cautions Cautions and ! Be sure to read the following safety cautions before conducting repair work. Warnings ! The caution items are classified into “ Warning” and “ Caution”. The “ Warning” items are especially important since they can lead to death or serious injury if they are not followed closely.
  • Page 7 Introduction SiENBE34-703 Caution Do not repair the electrical components with wet hands. Working on the equipment with wet hands can cause an electrical shock. Do not clean the air conditioner by splashing water. Washing the unit with water can cause an electrical shock. Be sure to provide the grounding when repairing the equipment in a humid or wet place, to avoid electrical shocks.
  • Page 8 SiENBE34-703 Introduction Warning Be sure to use the specified cable to connect between the indoor and outdoor units. Make the connections securely and route the cable properly so that there is no force pulling the cable at the connection terminals. Improper connections can cause excessive heat generation or fire.
  • Page 9 Introduction SiENBE34-703 Caution Check to see if the parts and wires are mounted and connected properly, and if the connections at the soldered or crimped terminals are secure. Improper installation and connections can cause excessive heat generation, fire or an electrical shock. If the installation platform or frame has corroded, replace it.

  • Page 10: Preface

    Thank you for your continued patronage of Daikin products. This is the new service manual for Daikin's Year 2007 VRVIII-S series Heat Pump System. Daikin offers a wide range of models to respond to building and office air conditioning needs.
  • Page 11 Introduction SiENBE34-703...

  • Page 12: Part 1 General Information

    SiENBE34-703 Part 1 General Information 1. Model Names of Indoor/Outdoor Units............2 2. External Appearance................3 2.1 Indoor Units ....................3 3. Capacity Range..................4 General Information...

  • Page 13: Model Names Of Indoor/Outdoor Units

    Model Names of Indoor/Outdoor Units SiENBE34-703 1. Model Names of Indoor/Outdoor Units *Indoor Units Type Model Name Power Supply Ceiling Mounted FXCQ 20M8 25M8 32M8 40M8 50M8 63M8 80M8 — 125M8 Cassette Type (Double Flow) Ceiling Mounted FXFQ 20P7 25P7 32P7 40P7 50P7...

  • Page 14: External Appearance

    SiENBE34-703 External Appearance 2. External Appearance Indoor Units Ceiling Mounted Cassette Type (Double Flow) Ceiling Mounted Duct Type FXCQ20M8 FXMQ40MA FXCQ25M8 FXMQ50MA FXCQ32M8 FXMQ63MA FXCQ40M8 FXMQ80MA FXCQ50M8 FXMQ100MA FXCQ63M8 FXMQ125MA FXCQ80M8 FXCQ125M8 Ceiling Mounted Cassette Type (Multi Flow) Ceiling Suspended Type FXFQ25P7 FXHQ32MA FXFQ32P7...

  • Page 15: Capacity Range

    Capacity Range SiENBE34-703 3. Capacity Range Outdoor Units Capacity Range RXYSQ No of Indoor Units to be Connected Total Capacity Index of Indoor 50~130 62.5~162.5 70~182 Units to be Connected Indoor Units Capacity Range 0.8HP 1.25HP 1.6HP 2.5HP 3.2HP Capacity Index 31.25 62.5 Ceiling Mounted...

  • Page 16: Part 2 Specifications

    SiENBE34-703 Part 2 Specifications 1. Specifications ..................6 1.1 Outdoor Units ...................6 1.2 Indoor Units ....................8 Specifications...

  • Page 17: Specifications

    / h 10,800 13,800 H2 Heating Capacity Btu / h 42,700 54,600 12.5 16.0 Casing Color Daikin White Daikin White Dimensions: (H×W×D) 1,345×900×320 1,345×900×320 Heat Exchanger Cross Fin Coil Cross Fin Coil Type Hermetically Sealed Scroll Type Hermetically Sealed Scroll Type Piston Displacement m³/h...
  • Page 18 Btu / h 52,900 15.5 kcal / h 15,500 H2 Heating Capacity Btu / h 61,400 18.0 Casing Color Daikin White Dimensions: (H×W×D) 1,345×900×320 Heat Exchanger Cross Fin Coil Type Hermetically Sealed Scroll Type Piston Displacement m³/h 19.36 Number of Revolutions r.p.m...

  • Page 19: Indoor Units

    Specifications SiENBE34-703 Indoor Units Ceiling Mounted Cassette Type (Double Flow) Model FXCQ20M8V3 FXCQ25M8V3 FXCQ32M8V3 FXCQ40M8V3 kcal/h H1 Cooling Capacity (19.5°CWB) Btu/h H2 Cooling Capacity (19.0°CWB) kcal/h H3 Heating Capacity Btu/h Casing Dimensions: (H×W×D) Rows×Stages×Fin Pitch Coil (Cross Fin Coil) Face Area m²...
  • Page 20 SiENBE34-703 Specifications Ceiling Mounted Cassette Type (Double Flow) Model FXCQ50M8V3 FXCQ63M8V3 FXCQ80M8V3 FXCQ125M8V3 kcal/h H1 Cooling Capacity (19.5°CWB) Btu/h H2 Cooling Capacity (19.0°CWB) kcal/h H3 Heating Capacity Btu/h Casing Dimensions: (H×W×D) Rows×Stages×Fin Pitch Coil (Cross Fin Coil) Face Area m² Model Type Motor Output ×...
  • Page 21 Specifications SiENBE34-703 Ceiling Mounted Cassette Type (Multi-flow) Model FXFQ20P7VE FXFQ25P7VE FXFQ32P7VE FXFQ40P7VE kcal/h H1 Cooling Capacity (19.5°CWB) Btu/h H2 Cooling Capacity (19.0°CWB) kcal/h H3 Heating Capacity Btu/h Casing Dimensions: (H×W×D) Rows×Stages×Fin Pitch Coil (Cross Fin Coil) Face Area m² Model Type Motor Output ×...
  • Page 22 SiENBE34-703 Specifications Ceiling Mounted Cassette Type (Multi-flow) Model FXFQ50P7VE FXFQ63P7VE FXFQ80P7VE FXFQ100P7VE kcal/h H1 Cooling Capacity (19.5°CWB) Btu/h H2 Cooling Capacity (19.0°CWB) kcal/h H3 Heating Capacity Btu/h Casing Dimensions: (H×W×D) Rows×Stages×Fin Pitch Coil (Cross Fin Coil) Face Area m² Model Type Motor Output ×...
  • Page 23 Specifications SiENBE34-703 Model FXFQ125P7VE kcal/h H1 Cooling Capacity (19.5°CWB) Btu/h H2 Cooling Capacity (19.0°CWB) kcal/h H3 Heating Capacity Btu/h Casing Dimensions: (H×W×D) Rows×Stages×Fin Pitch Coil (Cross Fin Coil) Face Area m² Model Type Motor Output × Number of Units m³/min Air Flow Rate (H/L) Drive Temperature Control...
  • Page 24 SiENBE34-703 Specifications 600×600 Ceiling Mounted Cassette Type (Multi Flow) Model FXZQ20M8V1 FXZQ25M8V1 FXZQ32M8V1 kcal/h H1 Cooling Capacity (19.5°CWB) Btu/h H2 Cooling Capacity (19.0°CWB) kcal/h H3 Heating Capacity Btu/h Casing Dimensions: (H×W×D) Rows×Stages×Fin Pitch Coil (Cross Fin Coil) Face Area m² Model Type Motor Output ×...
  • Page 25 Specifications SiENBE34-703 600×600 Ceiling Mounted Cassette Type (Multi Flow) Model FXZQ40M8V1 FXZQ50M8V1 kcal/h H1 Cooling Capacity (19.5°CWB) Btu/h H2 Cooling Capacity (19.0°CWB) kcal/h H3 Heating Capacity Btu/h Casing Dimensions: (H×W×D) Rows×Stages×Fin Pitch Coil (Cross Fin Coil) Face Area m² Model Type Motor Output ×...
  • Page 26 SiENBE34-703 Specifications Ceiling Mounted Cassette Corner Type Model FXKQ25MAVE FXKQ32MAVE FXKQ40MAVE FXKQ63MAVE kcal/h 2,500 3,200 4,000 6,300 H1 Cooling Capacity (19.5°CWB) Btu/h 9,900 12,600 16,000 24,900 H2 Cooling Capacity (19.0°CWB) kcal/h 2,800 3,400 4,300 6,900 H3 Heating Capacity Btu/h 10,900 13,600 17,100 27,300...
  • Page 27 Specifications SiENBE34-703 Slim Ceiling Mounted Duct Type (with Drain Pump) Model FXDQ20NAVE FXDQ25NAVE FXDQ32NAVE kcal/h 2,000 2,500 3,200 H1 Cooling Capacity (19.5°CWB) Btu/h 7,800 9,900 12,600 H2 Cooling Capacity (19.0°CWB) kcal/h 2,200 2,800 3,400 H3 Heating Capacity Btu/h 8,500 10,900 13,600 Casing Galvanized Steel Plate...
  • Page 28 SiENBE34-703 Specifications Slim Ceiling Mounted Duct Type (with Drain Pump) Model FXDQ40NAVE FXDQ50NAVE FXDQ63NAVE kcal/h 4,000 5,000 6,300 H1 Cooling Capacity (19.5°CWB) Btu/h 16,000 19,800 24,900 H2 Cooling Capacity (19.0°CWB) kcal/h 4,300 5,400 6,900 H3 Heating Capacity Btu/h 17,100 21,500 27,300 Casing Color Galvanized Steel Plate...
  • Page 29 Specifications SiENBE34-703 Slim Ceiling Mounted Duct Type (with Drain Pump) Model FXDQ20M8VE FXDQ25M8VE kcal/h H1 Cooling Capacity (19.5°CWB) Btu/h H2 Cooling Capacity (19.0°CWB) kcal/h H3 Heating Capacity Btu/h Casing Dimensions: (H×W×D) Rows×Stages×Fin Pitch Coil (Cross Fin Coil) Face Area m² Model Type Motor Output ×...
  • Page 30 SiENBE34-703 Specifications Ceiling Mounted Built-in Type Model FXSQ20M8V3 FXSQ25M8V3 FXSQ32M8V3 kcal/h H1 Cooling Capacity (19.5°CWB) Btu/h H2 Cooling Capacity (19.0°CWB) kcal/h H3 Heating Capacity Btu/h Casing Dimensions: (H×W×D) Rows×Stages×Fin Pitch Coil (Cross Fin Coil) Face Area m² Model Type Motor Output × Number of Units Air Flow Rate (H/L) m³/min...
  • Page 31 Specifications SiENBE34-703 Ceiling Mounted Built-in Type Model FXSQ40M8V3 FXSQ50M8V3 FXSQ63M8V3 kcal/h H1 Cooling Capacity (19.5°CWB) Btu/h H2 Cooling Capacity (19.0°CWB) kcal/h H3 Heating Capacity Btu/h Casing Dimensions: (H×W×D) Rows×Stages×Fin Pitch Coil (Cross Fin Coil) Face Area m² Model Type Motor Output × Number of Units Air Flow Rate (H/L) m³/min...
  • Page 32 SiENBE34-703 Specifications Ceiling Mounted Built-in Type Model FXSQ80M8V3 FXSQ100M8V3 FXSQ125M8V3 kcal/h H1 Cooling Capacity (19.5°CWB) Btu/h H2 Cooling Capacity (19.0°CWB) kcal/h H3 Heating Capacity Btu/h Casing Dimensions: (H×W×D) Rows×Stages×Fin Pitch Coil (Cross Fin Coil) Face Area m² Model Type Motor Output × Number of Units Air Flow Rate (H/L) m³/min...
  • Page 33 Specifications SiENBE34-703 Ceiling Mounted Duct Type Model FXMQ40MAVE FXMQ50MAVE FXMQ63MAVE FXMQ80MAVE kcal/h 4,000 5,000 6,300 8,000 H1 Cooling Capacity (19.5°CWB) Btu/h 16,000 19,800 24,900 31,700 H2 Cooling Capacity (19.0°CWB) kcal/h 4,300 5,400 6,900 8,600 H3 Heating Capacity Btu/h 17,100 21,500 27,300 34,100 10.0...
  • Page 34 SiENBE34-703 Specifications Ceiling Mounted Duct Type Model FXMQ100MAVE FXMQ125MAVE kcal/h 10,000 12,500 H1 Cooling Capacity (19.5°CWB) Btu/h 39,600 49,500 11.6 14.5 H2 Cooling Capacity (19.0°CWB) 11.2 14.0 kcal/h 10,800 13,800 H3 Heating Capacity Btu/h 42,700 54,600 12.5 16.0 Casing Galvanized Steel Plate Galvanized Steel Plate Dimensions: (H×W×D) 390×1,110×690...

  • Page 35: Ceiling Suspended Type

    Specifications SiENBE34-703 Ceiling Suspended Type Model FXHQ32MAVE FXHQ63MAVE FXHQ100MAVE kcal/h 3,200 6,300 10,000 H1 Cooling Capacity (19.5°CWB) Btu/h 12,600 24,900 39,600 11.6 H2 Cooling Capacity (19.0°CWB) 11.2 kcal/h 3,400 6,900 10,800 H3 Heating Capacity Btu/h 13,600 27,300 42,700 12.5 Casing Color White (10Y9/0.5) White (10Y9/0.5) White (10Y9/0.5)
  • Page 36 SiENBE34-703 Specifications Wall Mounted Type Model FXAQ20MAVE FXAQ25MAVE FXAQ32MAVE kcal/h 2,000 2,500 3,200 H1 Cooling Capacity (19.5°CWB) Btu/h 7,800 9,900 12,600 H2 Cooling Capacity (19.0°CWB) kcal/h 2,200 2,800 3,400 H3 Heating Capacity Btu/h 8,500 10,900 13,600 Casing Color White (3.0Y8.5/10.5) White (3.0Y8.5/10.5) White (3.0Y8.5/10.5) Dimensions: (H×W×D)
  • Page 37 Specifications SiENBE34-703 Wall Mounted Type Model FXAQ40MAVE FXAQ50MAVE FXAQ63MAVE kcal/h 4,000 5,000 6,300 H1 Cooling Capacity (19.5°CWB) Btu/h 16,000 19,800 24,900 H2 Cooling Capacity (19.0°CWB) kcal/h 4,300 5,400 6,900 H3 Heating Capacity Btu/h 17,100 21,500 27,300 Casing Color White (3.0Y8.5/10.5) White (3.0Y8.5/10.5) White (3.0Y8.5/10.5) Dimensions: (H×W×D)

  • Page 38: Floor Standing Type

    SiENBE34-703 Specifications Floor Standing Type Model FXLQ20MAVE FXLQ25MAVE FXLQ32MAVE kcal/h 2,000 2,500 3,200 H1 Cooling Capacity (19.5°CWB) Btu/h 7,800 9,900 12,600 H2 Cooling Capacity (19.0°CWB) kcal/h 2,200 2,800 3,400 H3 Heating Capacity Btu/h 8,500 10,900 13,600 Casing Color Ivory White (5Y7.5/1) Ivory White (5Y7.5/1) Ivory White (5Y7.5/1) Dimensions: (H×W×D)
  • Page 39 Specifications SiENBE34-703 Floor Standing Type Model FXLQ40MAVE FXLQ50MAVE FXLQ63MAVE kcal/h 4,000 5,000 6,300 H1 Cooling Capacity (19.5°CWB) Btu/h 16,000 19,800 24,900 H2 Cooling Capacity (19.0°CWB) kcal/h 4,300 5,400 6,900 H3 Heating Capacity Btu/h 17,100 21,500 27,300 Casing Color Ivory White (5Y7.5/1) Ivory White (5Y7.5/1) Ivory White (5Y7.5/1) Dimensions: (H×W×D)
  • Page 40 SiENBE34-703 Specifications Concealed Floor Standing Type Model FXNQ20MAVE FXNQ25MAVE FXNQ32MAVE kcal/h 2,000 2,500 3,200 H1 Cooling Capacity (19.5°CWB) Btu/h 7,800 9,900 12,600 H2 Cooling Capacity (19.0°CWB) kcal/h 2,200 2,800 3,400 H3 Heating Capacity Btu/h 8,500 10,900 13,600 Casing Color Galvanized Steel Plate Galvanized Steel Plate Galvanized Steel Plate Dimensions: (H×W×D)
  • Page 41 Specifications SiENBE34-703 Concealed Floor Standing Type Model FXNQ40MAVE FXNQ50MAVE FXNQ63MAVE kcal/h 4,000 5,000 6,300 H1 Cooling Capacity (19.5°CWB) Btu/h 16,000 19,800 24,900 H2 Cooling Capacity (19.0°CWB) kcal/h 4,300 5,400 6,900 H3 Heating Capacity Btu/h 17,100 21,500 27,300 Casing Color Galvanized Steel Plate Galvanized Steel Plate Galvanized Steel Plate Dimensions: (H×W×D)
  • Page 42 SiENBE34-703 Specifications Ceiling Suspended Cassette Type Indoor Unit FXUQ71MAV1 FXUQ100MAV1 FXUQ125MAV1 Model Connection Unit BEVQ71MAVE BEVQ100MAVE BEVQ125MAVE kcal/h 7,100 10,000 12,500 H1 Cooling Capacity (19.5°CWB) Btu/h 28,300 39,600 49,500 11.6 14.5 H2 Cooling Capacity (19.0°CWB) 11.2 14.0 kcal/h 7,700 10,800 12,000 H3 Heating Capacity Btu/h...
  • Page 43 Specifications SiENBE34-703 BEV Units Model BEVQ71MAVE BEVQ100MAVE BEVQ125MAVE Power Supply 1 Phase 50Hz 220~240V 1 Phase 50Hz 220~240V 1 Phase 50Hz 220~240V Casing Galvanized Steel Plate Galvanized Steel Plate Galvanized Steel Plate Dimensions: (H×W×D) 100×350×225 100×350×225 100×350×225 Flame and Heat Resistant Foamed Flame and Heat Resistant Foamed Flame and Heat Resistant Foamed Sound Absorbing Thermal Insulation Material...

  • Page 44: Part 3 List Of Electrical And Functional Parts

    SiENBE34-703 Part 3 List of Electrical and Functional Parts 1. List of Electrical and Functional Parts ...........34 1.1 Outdoor Unit ...................34 List of Electrical and Functional Parts...

  • Page 45: List Of Electrical And Functional Parts

    List of Electrical and Functional Parts SiENBE34-703 1. List of Electrical and Functional Parts Outdoor Unit Model Remark Item Name Symbol (PCB terminal) Type JT1G-VDLYR Relay Inverter Compressor Output 2.5kW 3.0kW 3.5kW A2P X102A Crankcase heater (INV) E1HC A1P X28A Motor M1F·M2F 0.07kW...

  • Page 46: Part 4 Refrigerant Circuit

    SiENBE34-703 Part 4 Refrigerant Circuit 1. Refrigerant Circuit .................36 1.1 RXYSQ4 / 5 / 6P ..................36 2. Functional Parts Layout ................38 2.1 RXYSQ4 / 5 / 6P ..................38 Refrigerant Circuit...

  • Page 47: Refrigerant Circuit

    Refrigerant Circuit SiENBE34-703 1. Refrigerant Circuit RXYSQ4 / 5 / 6P No. in refrigerant Symbol Name Major Function system diagram Inverter compressor is operated on frequencies between 36 Hz and 195 Hz by using Inverter compressor (INV) the inverter. 31 steps Since the system is of air heat exchanging type, the fan is operated at 8-step rotation Inverter fan speed by using the inverter.
  • Page 48 SiENBE34-703 Refrigerant Circuit C : 3D052628 Refrigerant Circuit...

  • Page 49: Functional Parts Layout

    Functional Parts Layout SiENBE34-703 2. Functional Parts Layout RXYSQ4 / 5 / 6P Birds-eye view PRESSURE SENSOR (HIGH) LEAD WIRE S1NPH R6T SUBCOOLING GAS PIPE (CONNECTOR COLOR : RED) (CONNECTOR COLOR : WHITE) (LOW VOLTAGE) R3T THERMISTOR (SUCTION 1) (MARKING COLOR : RED) SOLENOID VALVE LEAD WIRE Y1S 4 WAY VALVE LEAD WIRE (CONNECTOR COLOR : BLACK)

  • Page 50: Part 5 Function

    SiENBE34-703 Part 5 Function 1. Operation Mode ..................40 2. Basic Control..................41 2.1 Normal Operation ...................41 2.2 Compressor PI Control................42 2.3 Electronic Expansion Valve PI Control...........43 2.4 Cooling Operation Fan Control...............44 3. Special Control..................45 3.1 Startup Control ..................45 3.2 Oil Return Operation ................46 3.3 Defrosting Operation ................48 3.4 Pump-down Residual Operation ............49 3.5 Restart Standby..................50...

  • Page 51: Operation Mode

    Operation Mode SiENBE34-703 1. Operation Mode Operation in stop mode Indoor unit stop or Indoor unit thermostat ON thermostat OFF Malfunction/Standby Restart standby Pressure (Compressor stop) equalization prior to startup Malfunction/ Standby Indoor unit stop or thermostat OFF Startup control •...

  • Page 52: Basic Control

    SiENBE34-703 Basic Control 2. Basic Control Normal Operation ! Cooling Operation Actuator Operation Remarks Used for high pressure protection control, low pressure protection control, discharge pipe Compressor Compressor PI control temperature protection control, and compressor operating frequency upper limit control with inverter protection control.

  • Page 53: Compressor Pi Control

    Basic Control SiENBE34-703 Compressor PI Control Compressor PI Control Carries out the compressor capacity PI control to maintain Te at constant during cooling operation and Tc at constant during heating operation to ensure stable unit performance. [Cooling operation] Controls compressor capacity to adjust Te to Te : Low pressure equivalent saturation temperature achieve target value (TeS).

  • Page 54: Electronic Expansion Valve Pi Control

    SiENBE34-703 Basic Control Electronic Expansion Valve PI Control Main Electronic Expansion Valve EV1 Control Carries out the electronic expansion valve (Y1E) PI control to maintain the evaporator outlet superheated degree (SH) at constant during heating operation to make maximum use of the outdoor unit heat exchanger (evaporator).

  • Page 55: Cooling Operation Fan Control

    Basic Control SiENBE34-703 Cooling Operation Fan Control In cooling operation with low outdoor air temperature, this control is used to provide the adequate amount of circulation air with liquid pressure secured by high pressure control using outdoor unit fan. Furthermore, when outdoor temperature ≥ 20°C, the compressor will run in Step 7 or higher. When outdoor temperature ≥...

  • Page 56: Special Control

    SiENBE34-703 Special Control 3. Special Control Startup Control This control is used to equalize the pressure in the front and back of the compressor prior to the startup of the compressor, thus reducing startup loads. Furthermore, the inverter is turned ON to charge the capacitor. In addition, to avoid stresses to the compressor due to oil return or else after the startup, the following control is made and the position of the four way valve is also determined.

  • Page 57: Oil Return Operation

    Special Control SiENBE34-703 Oil Return Operation In order to prevent the compressor from running out of oil, the oil return operation is conducted to recover oil flown out from the compressor to the system side. 3.2.1 Oil Return Operation in Cooling Operation [Start conditions] Referring to the set conditions for the following items, start the oil return operation in cooling.
  • Page 58 SiENBE34-703 Special Control 3.2.2 Oil Return Operation in Heating Operation [Conditions to start] The heating oil-returning operation is started referring following conditions. ! Integrated amount of displaced oil ! Timer (After the power is turned on, integrated operating-time is 2 hours and subsequently every 8 hours.) In addition, integrated amount of displaced oil is derived from Tc, Te, and the compressor load.

  • Page 59: Defrosting Operation

    Special Control SiENBE34-703 Defrosting Operation The defrost operation is performed to solve frost on the outdoor unit heat exchanger when heating, and the heating capacity is recovered. [Conditions to start] The defrost operation is started referring following conditions. ! Outdoor heat exchanger heat transfer co-efficiency ! Temperature of heat-exchange (Tb) ! Timer (2 hours at the minimum) In addition, outdoor heat-exchange co-efficiency is derived from Tc, Te, and the compressor...

  • Page 60: Pump-Down Residual Operation

    SiENBE34-703 Special Control Pump-down Residual Operation When activating compressor, if the liquid refrigerant remains in the heat-exchanger, the liquid enters into the compressor and dilutes oil therein resulting in decrease of lubricity. Therefore, the pump-down residual operation is performed to collect the refrigerant in the heat- exchanger when the compressor is down.

  • Page 61: Restart Standby

    Special Control SiENBE34-703 Restart Standby Restart is stood by force to prevent frequent power-on/off and to equalize pressure in the refrigerant system. Actuator Operation Remarks ⎯ Compressor Ta>30°C: STEP4 ⎯ Outdoor unit fan Ta≤30°C: OFF ⎯ Four way valve Keep former condition. ⎯...

  • Page 62: Stopping Operation

    SiENBE34-703 Special Control Stopping Operation Operation of the actuator when the system is down, is cleared up. 3.6.1 When System is in Stop Mode Actuator Operation Compressor Outdoor unit fan Four way valve Keep former condition. Main electronic expansion valve (EV1) 0 pls Subcooling electronic expansion valve (EV3) 0 pls...

  • Page 63: Protection Control

    Protection Control SiENBE34-703 4. Protection Control High Pressure Protection Control This high pressure protection control is used to prevent the activation of protection devices due to abnormal increase of high pressure and to protect compressors against the transient increase of high pressure. [In cooling operation] Pc>3.47MPa High pressure not limited...

  • Page 64: Low Pressure Protection Control

    SiENBE34-703 Protection Control Low Pressure Protection Control This low pressure protection control is used to protect compressors against the transient decrease of low pressure. [In cooling operation] Low pressure not limited Pe: LP pressure sensor detection value Pe>0.39MPa Pe<0.25MPa Low pressure Hot gas SVP = OFF limited Pe<0.15MPa...

  • Page 65: Discharge Pipe Protection Control

    Protection Control SiENBE34-703 Discharge Pipe Protection Control This discharge pipe protection control is used to protect the compressor internal temperature against a malfunction or transient increase of discharge pipe temperature. [INV compressor] Discharge pipe protection HTdi : Value of INV compressor discharge pipe control not limited temperature (Tdi) compensated with outdoor air temperature...

  • Page 66: Inverter Protection Control

    SiENBE34-703 Protection Control Inverter Protection Control Inverter current protection control and inverter fin temperature control are performed to prevent tripping due to a malfunction, or transient inverter overcurrent, and fin temperature increase. [Inverter overcurrent protection control] Not limited ·Inverter current12A &...

  • Page 67: Other Control

    Other Control SiENBE34-703 5. Other Control Demand Operation In order to save the power consumption, the capacity of outdoor unit is saved with control forcibly by using “Demand 1 Setting”. To operate the unit with this mode, additional setting of “Continuous Demand Setting”. [Demand 1 setting] Setting Standard for upper limit of power consumption...

  • Page 68: Outline Of Control (Indoor Unit)

    SiENBE34-703 Outline of Control (Indoor Unit) 6. Outline of Control (Indoor Unit) Drain Pump Control 1. The drain pump is controlled by the ON/OFF buttons (4 button (1) - (4) given in the figure below). 6.1.1 When the Float Switch is Tripped while the Cooling Thermostat is Remote control “A3”...

  • Page 69: Remote Control

    Outline of Control (Indoor Unit) SiENBE34-703 6.1.3 When the Float Switch is Tripped During Heating Operation: Remote control “A3” flashing malfunction stop Thermostat (running) Humidifier Reset Float switch Drain pump 5 sec. 5 min. 5 min. (VL010) During heating operation, if the float switch is not reset even after the 5 minutes operation, 5 seconds stop, 5 minutes operation cycle ends, operation continues until the switch is reset.

  • Page 70: Louver Control For Preventing Ceiling Dirt

    SiENBE34-703 Outline of Control (Indoor Unit) Louver Control for Preventing Ceiling Dirt We have added a control feature that allows you to select the range of in which air direction can be adjusted in order to prevent the ceiling surrounding the air discharge outlet of ceiling mounted cassette type units from being soiled.

  • Page 71: Thermostat Sensor In Remote Control

    Outline of Control (Indoor Unit) SiENBE34-703 Thermostat Sensor in remote control Temperature is controlled by both the thermostat sensor in remote control and air suction thermostat in the indoor unit. (This is however limited to when the field setting for the thermostat sensor in remote control is set to “Use.”...
  • Page 72 SiENBE34-703 Outline of Control (Indoor Unit) Heating When heating, the hot air rises to the top of the room, resulting in the temperature being lower near the floor where the occupants are. When controlling by body thermostat sensor only, the unit may therefore be turned off by the thermostat before the lower part of the room reaches the preset temperature.

  • Page 73: Freeze Prevention

    Outline of Control (Indoor Unit) SiENBE34-703 Freeze Prevention Freeze When the temperature detected by liquid pipe temperature thermistor (R2T) of the indoor unit heat exchanger drops too low, the unit enters freeze prevention operation in accordance with Prevention by Off the following conditions, and is also set in accordance with the conditions given below.

  • Page 74: View Of Operations Of Swing Flaps

    SiENBE34-703 Outline of Control (Indoor Unit) View of Operations of Swing Flaps Swing flaps work as following. Flap control FXCQ FXFQ FXKQ FXAQ FXHQ Swinging Level Level Level Hot-start from defrosting Setting the wind direction Level Level Level Swinging Level Level Level Defrosting...

  • Page 75: Electronic Expansion Valve Control

    Outline of Control (Indoor Unit) SiENBE34-703 Electronic Expansion Valve Control • Electronic expansion Valve Control In cooling, to maximize the capacity of indoor unit heat exchanger (evaporator), operate the electronic expansion valve under PI control so that the evaporator outlet superheated degree (SH) will become constant.

  • Page 76: Part 6 Test Operation

    SiENBE34-703 Part 6 Test Operation 1. Test Operation ..................66 1.1 Procedure and Outline ................66 1.2 Operation when Power is Turned On .............69 2. Outdoor Unit PC Board Layout .............70 3. Field Setting ..................71 3.1 Field Setting from remote control ............71 3.2 Field Setting from Outdoor Unit..............84 Test Operation...

  • Page 77: Test Operation

    Test Operation SiENBE34-703 1. Test Operation Procedure and Outline Follow the following procedure to conduct the initial test operation after installation. 1.1.1 Check Work Prior to Turn Power Supply On Is the power supply three-phase 380-415V / 50Hz? Check the below items. Have you finished a ductwork to drain? 2Power wiring Have you detach transport fitting?

  • Page 78: Check Operation

    SiENBE34-703 Test Operation 1.1.3 Check Operation * During check operation, mount front panel to avoid the misjudging. * Check operation is mandatory for normal unit operation. (When the check operation is not executed, alarm code "U3" will be displayed.) Press and hold the TEST The test operation is started automatically.
  • Page 79 Test Operation SiENBE34-703 1.1.4 Confirmation on Normal Operation • Conduct normal unit operation after the check operation has been completed. (When outdoor air temperature is 24°CDB or higher, the unit can not be operated with heating mode. See the installation manual attached.) •...

  • Page 80: Operation When Power Is Turned On

    SiENBE34-703 Test Operation Operation when Power is Turned On 1.2.1 When Turning On Power First Time The unit cannot be run for up to 12 minutes to automatically set the master power and address (indoor-outdoor address, etc.). Status Outdoor unit Test lamp H2P ..

  • Page 81: Outdoor Unit Pc Board Layout

    Outdoor Unit PC Board Layout SiENBE34-703 2. Outdoor Unit PC Board Layout Outdoor unit PC board LED indicator status :Turn off :Turn on :Flicker :Turn on or off (The LED indicator status shown at left indicates the status at factory set.) Changeover between Test cooling and heating...

  • Page 82: Field Setting

    SiENBE34-703 Field Setting 3. Field Setting Field Setting from remote control Individual function of indoor unit can be changed from the remote control. At the time of installation or after service inspection / repair, make the local setting in accordance with the following description.
  • Page 83 Field Setting SiENBE34-703 3.1.2 Wireless remote control - Indoor Unit BRC7C type BRC7E type BRC4C type Mode No. Field set mode Second code No. First code No. 1, 6 (V2770) 1. When in the normal mode, push the “ ” button for 4 seconds or more, and operation then enters the “field set mode.”...

  • Page 84: Simplified Remote Control

    SiENBE34-703 Field Setting 3.1.3 Simplified remote control BRC2C51 MODE NO. FIRST CODE NO. UNIT NO. SECOND CODE NO. 1. Remove the upper part of remote control. 2. When in the normal mode, press the [BS6] BUTTON (2) (field set), and the FIELD SET MODE is entered.
  • Page 85 Field Setting SiENBE34-703 3.1.4 Setting Contents and Code No. – VRV Indoor Unit Mode Setting Contents Second Code No.(Note 3) Setting Switch system indoor Note 2 unit — — 10(20) Filter contamination heavy/ Super Light Approx. Heavy Approx. settings light (Setting for display long life 10,000 5,000...
  • Page 86 SiENBE34-703 Field Setting 3.1.5 Applicable Range of Field Setting Ceiling mounted cassette type Slim Ceiling Ceiling Ceiling Wall Floor Concealed Ceiling Ceiling mounted mounted suspended mounted standing Floor suspended Multi Double 600×600 Corner mounted built-in duct type type type standing cassette flow flow...

  • Page 87: Detailed Explanation Of Setting Modes

    Field Setting SiENBE34-703 3.1.6 Detailed Explanation of Setting Modes Filter Sign Setting If switching the filter sign ON time, set as given in the table below. Set Time Filter Specs. Standard Long Life Ultra Long Life Filter Setting Contamination Light 200 hrs.
  • Page 88 SiENBE34-703 Field Setting Auto Restart after Power Failure Reset For the air conditioners with no setting for the function (same as factory setting), the units will be left in the stop condition when the power supply is reset automatically after power failure reset or the main power supply is turned on again after once turned off.
  • Page 89 Field Setting SiENBE34-703 Air Flow Direction Setting Set the air flow direction of indoor units as given in the table below. (Set when optional air outlet blocking pad has been installed.) The second code No. is factory set to “01.” Setting Table Second Code Mode No.
  • Page 90 SiENBE34-703 Field Setting Setting of Air Flow Direction Adjustment Range Make the following air flow direction setting according to the respective purpose. Setting Table Mode No. First Code No. Second Code No. Setting Upward (Draft prevention) 13 (23) Standard Downward (Ceiling soiling prevention) Air flow rate switching at discharge grille for field air flow rate switching When the optional parts (high performance filter, etc.) is installed, sets to change fan speed for...
  • Page 91 Field Setting SiENBE34-703 3.1.7 Centralized Control Group No. Setting BRC1C Type In order to conduct the central remote control using the central remote control and the unified ON/OFF controller, Group No. settings should be made by group using the operating remote control.
  • Page 92 SiENBE34-703 Field Setting BRC7C Type ! Group No. setting by infrared remote control for centralized control BRC7E Type 1. When in the normal mode, push “ ” button for 4 seconds or more, and operation then enters the “field set mode.” BRC4C Type 2.
  • Page 93 Field Setting SiENBE34-703 3.1.8 Setting of Operation Control Mode from remote control (Local Setting) The operation control mode is compatible with a variety of controls and operations by limiting the functions of the operation remote control. Furthermore, operations such as remote control ON/OFF can be limited in accordance with the combination conditions.
  • Page 94 SiENBE34-703 Field Setting How to Select Whether operation by remote control will be possible or not for turning on/off, controlling Operation Mode temperature or setting operation mode is selected and decided by the operation mode given on the right edge of the table below. Example ON by remote OFF by remote...

  • Page 95: Field Setting From Outdoor Unit

    Field Setting SiENBE34-703 Field Setting from Outdoor Unit 3.2.1 Setting by Dip Switches The following field settings are made by dip switches on PC board. Dipswitch Setting item Description Setting Cool / Heat Used to set cool / heat change over setting by remote DS1-1 change over control equipped with outdoor unit.
  • Page 96 SiENBE34-703 Field Setting Caution Capacity Setting after changing the main P.C.Board(A1P) to spare parts P.C.B. When you change the main P.C.Board(A1P) to spare parts P.C.B., please carry out the following setting. Please Attach the Capacity Setting Adapter corresponding to Capacity Class (ex. 112, 140, 160) in connector X51A. (See Below) Capacity Setting Adapter Capacity Class...
  • Page 97 Field Setting SiENBE34-703 ! Setting by pushbutton switches The following settings are made by pushbutton switches on PC board. LED indication (Factory setting) MODE RETURN TEST RESET (V2760) There are the following three setting modes. $ Setting mode 1 (H1P off) Initial status (when normal) : Also indicates during “abnormal”.
  • Page 98 SiENBE34-703 Field Setting a. “Setting mode 1” This mode is used to set and check the following items. 1. Set items ············ In order to make COOL/HEAT selection in a batch of outdoor unit group, change the setting. • COOL/HEAT selection (IND) ·····················Used to select COOL or HEAT by individual outdoor unit (factory set).
  • Page 99 Field Setting SiENBE34-703 b. “Setting mode 2” Setting item Description Cool/heat unified Sets address for cool/heat unified operation. address Push and hold the MODE (BS1) button for 5 seconds and set to Low noise/demand Address for low noise/demand operation “Setting mode 2”. address Used to conduct test operation without making changes Test operation...
  • Page 100 SiENBE34-703 Field Setting Setting item display C/H selection Setting condition display MODE TEST Demand Setting item noise Master Slave ∗ Factory set 8777777 ∗ Address Binary number Cool / Heat 8777778 Unified address (6 digits) 8788888 8777777 ∗ Address Binary number 8777778 Low noise/demand address...
  • Page 101 Field Setting SiENBE34-703 Setting item display C/H selection Setting condition display MODE TEST Demand Setting item noise Master Slave ∗ Factory set Level 1 (outdoor fan with 6 step or lower) 8777778 8777787 ∗ 25 Low noise setting Level 2 (outdoor fan with 5 step or lower) Level 3 (outdoor fan with 4 step or lower) 8777877 About 20:00...
  • Page 102 SiENBE34-703 Field Setting c. Monitor mode LED display Setting item Data display To enter the monitor mode, push the Various setting 9 7 7 7 7 7 7 See below MODE (BS1) button when in “Setting C/H unified address 9 7 7 7 7 7 8 mode 1”.
  • Page 103 Field Setting SiENBE34-703 Push the SET button and match with the LEDs No. 1 - 15, push the RETURN button, and confirm the data for each setting. H Data such as addresses and number of units is expressed as binary numbers; the two ways of expressing are as follows: The No.
  • Page 104 SiENBE34-703 Field Setting 3.2.2 Cool / Heat Mode Switching There are the following 4 cool/heat switching modes. $ Set cool/heat separately for each outdoor unit system by indoor unit remote control. % Set cool/heat separately for each outdoor unit system by cool/heat switching remote control. &...
  • Page 105 Field Setting SiENBE34-703 % Set Cool / Heat Separately for Each Outdoor Unit System by Cool/Heat Switching remote control # It does not matter whether or not there is outdoor - outdoor unit wiring. # Set outdoor unit PC board DS1-1 to OUT (factory set). # Set cool/heat switching to IND (individual) for “Setting mode 1”...

  • Page 106: Setting Of Low Noise Operation And Demand Operation

    SiENBE34-703 Field Setting 3.2.3 Setting of Low Noise Operation and Demand Operation Setting of Low Noise Operation By connecting the external contact input to the low noise input of the outdoor unit external control adapter (optional), you can lower operating noise by 2-3 dB. When the low noise operation is carried out automatically at night (The external control adapter for outdoor unit is not required) 1.
  • Page 107 Field Setting SiENBE34-703 Setting of Demand Operation By connecting the external contact input to the demand input of the outdoor unit external control adapter (optional), the power consumption of unit operation can be saved suppressing the compressor operating condition. Set item Condition Content Demand...
  • Page 108 SiENBE34-703 Field Setting Detailed Setting Procedure of Low Noise Operation and Demand Control 1. Setting mode 1 (H1P off) $ In setting mode 2, push the BS1 (MODE button) one time. → Setting mode 1 is entered and H1P off. During the setting mode 1 is displayed, “In low noise operation”...
  • Page 109 Field Setting SiENBE34-703 " : ON : OFF : Blink & Setting Setting Setting No. indication Setting No. indication Setting Setting contents indication (Initial setting) contents contents H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P External "...

  • Page 110: Setting Of Refrigerant Additional Charging Operation

    SiENBE34-703 Field Setting 3.2.4 Setting of Refrigerant Additional Charging Operation When the outdoor unit is stopped and the entire quantity of refrigerant cannot be charged from the stop valve on the liquid side, make sure to charge the remaining quantity of refrigerant using this procedure. If the refrigerant quantity is insufficient, the unit may malfunction.
  • Page 111 Field Setting SiENBE34-703 3.2.5 Setting of Refrigerant Recovery Mode When carrying out the refrigerant collection on site, fully open the respective expansion valve of indoor and outdoor units All indoor and outdoor unit’s operation are prohibited. [Operation procedure] $ In “Setting Mode 2” with units in stop mode, set “B Refrigerant Recovery / Vacuuming mode” to ON.
  • Page 112 SiENBE34-703 Field Setting 3.2.6 Setting of Vacuuming Mode In order to perform vacuuming operation at site, fully open the expansion valves of indoor and outdoor units and turn on some solenoid valves. [Operating procedure] $ In “Setting Mode 2” with units in stop mode, set “B Refrigerant Recovery / Vacuuming mode” to ON.
  • Page 113 Field Setting SiENBE34-703 Test Operation...

  • Page 114: Part 7 Troubleshooting

    SiENBE34-703 Part 7 Troubleshooting 1. Symptom-based Troubleshooting ............105 2. Troubleshooting by remote control............108 2.1 The INSPECTION / TEST Button............108 2.2 Self-diagnosis by Wired remote control..........109 2.3 Self-diagnosis by infrared remote control..........110 2.4 Operation of the remote control’s Inspection / Test Operation Button ................112 2.5 remote control Service Mode ...............113 2.6 remote control Self-Diagnosis Function ..........115 3.
  • Page 115 SiENBE34-703 3.27 “J9” Outdoor Unit: Malfunction of Subcooling Heat Exchanger Gas Pipe Thermistor (R4T) ..................154 3.28 “JA” Outdoor Unit: Malfunction of High Pressure Sensor......155 3.29 “JC” Outdoor Unit: Malfunction of Low Pressure Sensor.......156 3.30 “L1” Outdoor Unit: Malfunction of PC Board ..........157 3.31 “L4”...

  • Page 116: Symptom-Based Troubleshooting

    SiENBE34-703 Symptom-based Troubleshooting 1. Symptom-based Troubleshooting Symptom Supposed Cause Countermeasure The system does not start operation at all. Blowout of fuse(s) Turn Off the power supply and then replace the fuse(s). Cutout of breaker(s) • If the knob of any breaker is in its OFF position, turn ON the power supply.
  • Page 117 Symptom-based Troubleshooting SiENBE34-703 Symptom Supposed Cause Countermeasure COOL-HEAT The remote control displays This remote control has no option Use a remote control with option selection is "UNDER CENTRALIZED to select cooling operation. to select cooling operation. disabled. CONTROL". The remote control displays COOL-HEAT selection is made Use the COOL-HEAT selection "UNDER CENTRALIZED...
  • Page 118 SiENBE34-703 Symptom-based Troubleshooting Symptom Supposed Cause Countermeasure 11 The system <Indoor unit> These are operating sounds of Normal operation. produces Immediately after turning ON the electronic expansion valve of This sound becomes low after a sounds. the power supply, indoor unit the indoor unit.

  • Page 119: Troubleshooting By Remote Control

    Troubleshooting by Remote Control SiENBE34-703 2. Troubleshooting by Remote Control The INSPECTION / TEST Button The following modes can be selected by using the [Inspection/Test Operation] button on the remote control. Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred.

  • Page 120: Self-Diagnosis By Wired Remote Control

    SiENBE34-703 Troubleshooting by Remote Control Self-diagnosis by Wired Remote Control Explanation If operation stops due to malfunction, the remote control’s operation LED blinks, and malfunction code is displayed. (Even if stop operation is carried out, malfunction contents are displayed when the inspection mode is entered.) The malfunction code enables you to tell what kind of malfunction caused operation to stop.

  • Page 121: Self-Diagnosis By Infrared Remote Control

    Troubleshooting by Remote Control SiENBE34-703 Self-diagnosis by Infrared Remote Control In the Case of If equipment stops due to a malfunction, the operation indicating LED on the light reception BRC7C Type section flashes. The malfunction code can be determined by following the procedure described below. (The BRC7E Type malfunction code is displayed when an operation error has occurred.
  • Page 122 SiENBE34-703 Troubleshooting by Remote Control ! The lower digit of the code changes as shown below when the UP and DOWN buttons are pressed. “Backward” button “Advance” button (SE007) Normal status Enters inspection mode from normal status when the INSPECTION/TEST button is pressed.

  • Page 123: Operation Of The Remote Control's Inspection / Test Operation Button

    Troubleshooting by Remote Control SiENBE34-703 Operation of the remote control’s Inspection / Test Operation Button Unit Malfunction code Inspection Malfunction code blinks when a malfunction occurs. Normal display (No display) Inspection/test Push the button. operation Unit 0 7 1... Capacity code Example of capacity code display Malfunction code F...

  • Page 124: Remote Control Service Mode

    SiENBE34-703 Troubleshooting by Remote Control remote control Service Mode How to Enter the Service Mode Normal operation Field set mode Service mode mode Push the button for 4 seconds or longer Push the button for 4 seconds or longer Service Mode 1.
  • Page 125 Troubleshooting by Remote Control SiENBE34-703 Mode Function Contents and operation method remote control display example Malfunction Display malfunction hysteresis. hysteresis display The history No. can be changed with the Unit 1 button. Malfunction code 2-U4 Malfunction code Hystory No: 1 - 9 1: Latest (VE007) Display of sensor...

  • Page 126: Remote Control Self-Diagnosis Function

    SiENBE34-703 Troubleshooting by Remote Control remote control Self-Diagnosis Function The remote control switches are equipped with a self diagnosis function so that more appropriate maintenance can be carried out. If a malfunction occurs during operation, the operation lamp, malfunction code and display of malfunctioning unit No. let you know the contents and location of the malfunction.
  • Page 127 Troubleshooting by Remote Control SiENBE34-703 8: ON 7: OFF 9: Blink Malfunction Operation Inspection Unit No. Malfunction contents Page code lamp display Referred Indoor Unit Error of external protection device PC board defect, E PROM defect Malfunction of drain level control system (S1L) Fan motor (M1F) lock, overload Malfunction of swing flap motor (M1S) Malfunction of moving part of electronic expansion...
  • Page 128 SiENBE34-703 Troubleshooting by Remote Control 8: ON 7: OFF 9: Blink Malfunction Operation Inspection Unit No. Malfunction contents Page code lamp display Referred Outdoor Unit Malfunction of power unit — Malfunction of transmission between inverter and control PC board High voltage of capacitor in main inverter circuit. System Low pressure drop due to refrigerant shortage or electronic expansion valve failure...
  • Page 129 Troubleshooting by Remote Control SiENBE34-703 Malfunction code indication by outdoor unit PC board <Monitor mode> Contents of malfunction Malfunction code To enter the monitor mode, push the In-phase malfunction of DIII Net Detection of DIII Net MODE (BS1) button when in “Setting mode 1”.
  • Page 130 SiENBE34-703 Troubleshooting by Remote Control 8: ON 7: OFF 9:Blink Confirmation of malfunction 1 Confirmation of malfunction 2 Confirmation of malfunction 3 Confirmation of malfunction 4 Malfunction code H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P ∗1 ∗1 ∗1...
  • Page 131 Troubleshooting by Remote Control SiENBE34-703 <Monitor mode> Contents of malfunction Malfunction code To enter the monitor mode, push the Open phase/Power supply imbalance Imbalance of inverter power supply MODE (BS1) button when in “Setting voltage mode 1”. Faulty temperature sensor of inverter Faulty thermistor of inverter fin radiation fin Refrigerant shortage...
  • Page 132 SiENBE34-703 Troubleshooting by Remote Control 8: ON 7: OFF 9:Blink Confirmation of malfunction 1 Confirmation of malfunction 2 Confirmation of malfunction 3 Confirmation of malfunction 4 Malfunction code H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P ∗1 ∗1 Display of contents of...

  • Page 133: Troubleshooting By Indication On The Remote Control

    Troubleshooting by Indication on the remote control SiENBE34-703 3. Troubleshooting by Indication on the remote control “A0” Indoor Unit: Error of External Protection Device remote control Display Applicable All indoor unit models Models Method of Malfunction Detection Malfunction Decision Conditions Supposed ! Actuation of external protection device Causes...

  • Page 134: A1" Indoor Unit: Pc Board Defect

    SiENBE34-703 Troubleshooting by Indication on the remote control “A1 ” Indoor Unit: PC Board Defect remote control Display Applicable All indoor unit models Models Method of Check data from E²PROM. Malfunction Detection Malfunction When data could not be correctly received from the E²PROM Decision E²PROM : Type of nonvolatile memory.

  • Page 135: A3" Indoor Unit: Malfunction Of Drain Level Control System (S1L)

    Troubleshooting by Indication on the remote control SiENBE34-703 “A3 ” Indoor Unit: Malfunction of Drain Level Control System (S1L) remote control Display Applicable FXCQ, FXFQ, FXZQ, FXKQ, FXSQ, FXMQ, Models FXHQ (Option), FXAQ (Option) Method of By float switch OFF detection Malfunction Detection Malfunction...
  • Page 136 SiENBE34-703 Troubleshooting by Indication on the remote control Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Is power supply 220~240V provided? Provide 220~240V power supply. The float switch is A short circuit connected to X8A (or connector is...

  • Page 137: A6" Indoor Unit: Fan Motor (M1F) Lock, Overload

    Troubleshooting by Indication on the remote control SiENBE34-703 “A6” Indoor Unit: Fan Motor (M1F) Lock, Overload remote control Display Applicable All indoor unit models Models Method of Detection by failure of signal for detecting number of turns to come from the fan motor Malfunction Detection Malfunction...

  • Page 138: A7" Indoor Unit: Malfunction Of Swing Flap Motor (M1S)

    SiENBE34-703 Troubleshooting by Indication on the remote control “A7 ” Indoor Unit: Malfunction of Swing Flap Motor (M1S) remote control Display Applicable FXCQ, FXKQ, FXZQ, FXHQ, FXUQ Models Method of Utilizes ON/OFF of the limit switch when the motor turns. Malfunction Detection Malfunction...
  • Page 139 Troubleshooting by Indication on the remote control SiENBE34-703 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Is power supply 220~240V provided? Provide 220~240V power supply. Indoor unit is a model equipped Replace indoor unit PC board.

  • Page 140: A9" Indoor Unit: Malfunction Of Moving Part Of Electronic Expansion Valve (Y1E)

    SiENBE34-703 Troubleshooting by Indication on the remote control “A9” Indoor Unit: Malfunction of Moving Part of Electronic Expansion Valve (Y1E) remote control Display Applicable All indoor unit models Models Method of Malfunction Detection Malfunction Decision Conditions Supposed ! Malfunction of moving part of electronic expansion valve ! Defect of indoor unit PC board Causes ! Defect of connecting cable...
  • Page 141 Troubleshooting by Indication on the remote control SiENBE34-703 ∗1: Coil check method for the moving part of the electronic expansion valve Discount the electronic expansion valve from the PC board and check the continuity between the connector pins. (Normal) Pin No. 1.

  • Page 142: Af" Indoor Unit: Drain Level Above Limit

    SiENBE34-703 Troubleshooting by Indication on the remote control “AF” Indoor Unit: Drain Level above Limit remote control Display Applicable FXCQ, FXSQ, FXKQ, FXMQ, FXDQ Models Method of Water leakage is detected based on float switch ON/OFF operation while the compressor is in non-operation.

  • Page 143: Aj" Indoor Unit: Malfunction Of Capacity Determination Device

    Troubleshooting by Indication on the remote control SiENBE34-703 “AJ ” Indoor Unit: Malfunction of Capacity Determination Device remote control display Applicable All indoor unit models Models Method of Capacity is determined according to resistance of the capacity setting adapter and the memory inside the IC memory on the indoor unit PC board, and whether the value is normal or abnormal Malfunction is determined.

  • Page 144: C4" Indoor Unit: Malfunction Of Thermistor (R2T) For Heat Exchanger

    SiENBE34-703 Troubleshooting by Indication on the remote control “C4 ” Indoor Unit: Malfunction of Thermistor (R2T) for Heat Exchanger remote control Display Applicable All indoor unit models Models Method of Malfunction detection is carried out by temperature detected by heat exchanger thermistor. Malfunction Detection Malfunction...

  • Page 145: C5" Indoor Unit: Malfunction Of Thermistor (R3T) For Gas Pipes

    Troubleshooting by Indication on the remote control SiENBE34-703 3.10 “C5 ” Indoor Unit: Malfunction of Thermistor (R3T) for Gas Pipes remote control Display Applicable All indoor unit models Models Method of Malfunction detection is carried out by temperature detected by gas pipe thermistor. Malfunction Detection Malfunction...

  • Page 146: C9" Indoor Unit: Malfunction Of Thermistor (R1T) For Suction Air

    SiENBE34-703 Troubleshooting by Indication on the remote control 3.11 “C9 ” Indoor Unit: Malfunction of Thermistor (R1T) for Suction Air remote control Display Applicable AII indoor unit models Models Method of Malfunction detection is carried out by temperature detected by suction air temperature thermistor.

  • Page 147: Ca" Indoor Unit: Malfunction Of Thermistor For Discharge Air

    Troubleshooting by Indication on the remote control SiENBE34-703 3.12 “CA ” Indoor Unit: Malfunction of Thermistor for Discharge remote control Display Applicable AII indoor unit models Models Method of Malfunction detection is carried out by temperature detected by discharge air temperature thermistor.

  • Page 148: Cj" Indoor Unit: Malfunction Of Thermostat Sensor In Remote Control

    SiENBE34-703 Troubleshooting by Indication on the remote control 3.13 “CJ ” Indoor Unit: Malfunction of Thermostat Sensor in remote control remote control Display Applicable AII indoor unit models Models Method of Malfunction detection is carried out by temperature detected by remote control air temperature thermistor.

  • Page 149: E1" Outdoor Unit: Pc Board Defect

    Troubleshooting by Indication on the remote control SiENBE34-703 3.14 “E1 ” Outdoor Unit: PC Board Defect remote control Display Applicable RXYSQ4~6P Models Method of Check data from E²PROM Malfunction Detection Malfunction When data could not be correctly received from the E²PROM Decision E²PROM : Type of nonvolatile memory.

  • Page 150: E3" Outdoor Unit: Actuation Of High Pressure Switch

    SiENBE34-703 Troubleshooting by Indication on the remote control 3.15 “E3 ” Outdoor Unit: Actuation of High Pressure Switch remote control Display Applicable RXYSQ4~6P Models Method of Abnormality is detected when the contact of the high pressure protection switch opens. Malfunction Detection Malfunction Error is generated when the HPS activation count reaches the number specific to the operation...
  • Page 151 Troubleshooting by Indication on the remote control SiENBE34-703 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check for the points shown below. 1 Is the stop valve open? 2 Is the HPS connector properly connected to the main PCB? 3 Does the high pressure switch have continuity?

  • Page 152: E4" Outdoor Unit: Actuation Of Low Pressure Sensor

    SiENBE34-703 Troubleshooting by Indication on the remote control 3.16 “E4” Outdoor Unit: Actuation of Low Pressure Sensor remote control Display Applicable RXYSQ4~6P Models Method of Abnormality is detected by the pressure value with the low pressure sensor. Malfunction Detection Malfunction Error is generated when the low pressure is dropped under specific pressure.
  • Page 153 Troubleshooting by Indication on the remote control SiENBE34-703 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Is the stop Open the stop valve. valve open? 1 Mount a pressure gauge on the low-pressure service port. 2 Connect the Service Checker.

  • Page 154: E5" Inverter Compressor Motor Lock

    SiENBE34-703 Troubleshooting by Indication on the remote control 3.17 “E5 ” Inverter Compressor Motor Lock remote control Display Applicable RXYSQ4~6P Models Method of Inverter PC board takes the position signal from UVW line connected between the inverter and compressor, and the malfunction is detected when any abnormality is observed in the phase- Malfunction current waveform.

  • Page 155: E7" Malfunction Of Outdoor Unit Fan Motor

    Troubleshooting by Indication on the remote control SiENBE34-703 3.18 “E7 ” Malfunction of Outdoor Unit Fan Motor remote control Display Applicable RXYSQ4~6P Models Method of Malfunction of fan motor system is detected according to the fan speed detected by hall IC when the fan motor runs.

  • Page 156: E9" Outdoor Unit: Malfunction Of Moving Part Of Electronic Expansion Valve (Y1E, Y3E)

    SiENBE34-703 Troubleshooting by Indication on the remote control 3.19 “E9” Outdoor Unit: Malfunction of Moving Part of Electronic Expansion Valve (Y1E, Y3E) remote control Display Applicable RXYSQ4~6P Models Method of Check disconnection of connector Check continuity of expansion valve coil Malfunction Detection Malfunction...
  • Page 157 Troubleshooting by Indication on the remote control SiENBE34-703 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Turn power supply off, and turn power supply on again. Return to normal? External factor other than malfunction (for example, noise etc.).

  • Page 158: F3" Outdoor Unit: Abnormal Discharge Pipe Temperature

    SiENBE34-703 Troubleshooting by Indication on the remote control 3.20 “F3 ” Outdoor Unit: Abnormal Discharge Pipe Temperature remote control Display Applicable RXYSQ4~6P Models Method of Abnormality is detected according to the temperature detected by the discharge pipe temperature sensor. Malfunction Detection Malfunction When the discharge pipe temperature rises to an abnormally high level...

  • Page 159: F6" Outdoor Unit: Refrigerant Overcharged

    Troubleshooting by Indication on the remote control SiENBE34-703 3.21 “F6 ” Outdoor Unit: Refrigerant Overcharged remote control Display Applicable RXYSQ4~6P Models Method of Excessive charging of refrigerant is detected by using the heat exchanging deicer temperature during a check operation. Malfunction Detection Malfunction...

  • Page 160: H9" Outdoor Unit: Malfunction Of Thermistor (R1T) For Outdoor Air

    SiENBE34-703 Troubleshooting by Indication on the remote control 3.22 “H9” Outdoor Unit: Malfunction of Thermistor (R1T) for Outdoor Air remote control Display Applicable RXYSQ4~6P Models Method of Malfunction is detected from the temperature detected by the outdoor air thermistor. Malfunction Detection Malfunction When the outside air temperature thermistor has short circuit or open circuit.

  • Page 161: J3" Outdoor Unit: Malfunction Of Discharge Pipe Thermistor (R2T)

    Troubleshooting by Indication on the remote control SiENBE34-703 3.23 “J3 ” Outdoor Unit: Malfunction of Discharge Pipe Thermistor (R2T) remote control Display Applicable RXYSQ4~6P Models Method of Malfunction is detected from the temperature detected by discharge pipe temperature thermistor. Malfunction Detection Malfunction When a short circuit or an open circuit in the discharge pipe temperature thermistor is detected.

  • Page 162: J5" Outdoor Unit: Malfunction Of Thermistor (R3T, R5T) For Suction Pipe 1, 2

    SiENBE34-703 Troubleshooting by Indication on the remote control 3.24 “J5” Outdoor Unit: Malfunction of Thermistor (R3T, R5T) for Suction Pipe 1, 2 remote control Display Applicable RXYSQ4~6P Models Method of Malfunction is detected from the temperature detected by the thermistor for suction pipe 1, 2. Malfunction Detection Malfunction...

  • Page 163: J6" Outdoor Unit: Malfunction Of Thermistor (R6T) For Outdoor Unit Heat Exchanger

    Troubleshooting by Indication on the remote control SiENBE34-703 3.25 “J6” Outdoor Unit: Malfunction of Thermistor (R6T) for Outdoor Unit Heat Exchanger remote control Display Applicable RXYSQ4~6P Models Method of Malfunction is detected from the temperature detected by the heat exchanger thermistor. Malfunction Detection Malfunction...

  • Page 164: J7" Outdoor Unit: Malfunction Of Thermistor (R7T) For Outdoor Unit Liquid Pipe

    SiENBE34-703 Troubleshooting by Indication on the remote control 3.26 “J7” Outdoor Unit: Malfunction of Thermistor (R7T) for Outdoor Unit Liquid Pipe remote control Display Applicable RXYSQ4~6P Models Method of Malfunction is detected from the temperature detected by the liquid pipe thermistor. Malfunction Detection Malfunction...

  • Page 165: J9" Outdoor Unit: Malfunction Of Subcooling Heat Exchanger Gas Pipe Thermistor (R4T)

    Troubleshooting by Indication on the remote control SiENBE34-703 3.27 “J9” Outdoor Unit: Malfunction of Subcooling Heat Exchanger Gas Pipe Thermistor (R4T) remote control Display Applicable RXYSQ4~6P Models Method of Malfunction is detected according to the temperature detected by subcooling heat exchanger gas pipe thermistor.

  • Page 166: Ja" Outdoor Unit: Malfunction Of High Pressure Sensor

    SiENBE34-703 Troubleshooting by Indication on the remote control 3.28 “JA ” Outdoor Unit: Malfunction of High Pressure Sensor remote control Display Applicable RXYSQ4~6P Models Method of Malfunction is detected from the pressure detected by the high pressure sensor. Malfunction Detection Malfunction When the high pressure sensor is short circuit or open circuit.

  • Page 167: Jc" Outdoor Unit: Malfunction Of Low Pressure Sensor

    Troubleshooting by Indication on the remote control SiENBE34-703 3.29 “JC” Outdoor Unit: Malfunction of Low Pressure Sensor remote control Display Applicable RXYSQ4~6P Models Method of Malfunction is detected from pressure detected by low pressure sensor. Malfunction Detection Malfunction When the low pressure sensor is short circuit or open circuit. Decision Conditions Supposed...

  • Page 168: L1" Outdoor Unit: Malfunction Of Pc Board

    SiENBE34-703 Troubleshooting by Indication on the remote control 3.30 “L1 ” Outdoor Unit: Malfunction of PC Board remote control Display Applicable RXYSQ4~6P Models Method of ! Detect malfunctions by current value during waveform output before compressor startup. ! Detect malfunctions by current sensor value during synchronized operation at the time of Malfunction startup.

  • Page 169: L4" Outdoor Unit: Malfunction Of Inverter Radiating Fin Temperature Rise

    Troubleshooting by Indication on the remote control SiENBE34-703 3.31 “L4” Outdoor Unit: Malfunction of Inverter Radiating Fin Temperature Rise remote control Display Applicable RXYSQ4~6P Models Method of Fin temperature is detected by the thermistor of the radiation fin. Malfunction Detection Malfunction When the temperature of the inverter radiation fin increases above 83°C.

  • Page 170: L5" Outdoor Unit: Inverter Compressor Abnormal

    SiENBE34-703 Troubleshooting by Indication on the remote control 3.32 “L5” Outdoor Unit: Inverter Compressor Abnormal remote control Display Applicable RXYSQ4~6P Models Method of Malfunction is detected from current flowing in the power transistor. Malfunction Detection Malfunction When an excessive current flows in the power transistor. Decision (Instantaneous overcurrent also causes activation.) Conditions...

  • Page 171: L8" Outdoor Unit: Inverter Current Abnormal

    Troubleshooting by Indication on the remote control SiENBE34-703 3.33 “L8 ” Outdoor Unit: Inverter Current Abnormal remote control Display Applicable RXYSQ4~6P Models Method of Malfunction is detected by current flowing in the power transistor. Malfunction Detection Malfunction When overload in the compressor is detected. Decision Conditions Supposed...

  • Page 172: L9" Outdoor Unit: Inverter Start Up Error

    SiENBE34-703 Troubleshooting by Indication on the remote control 3.34 “L9” Outdoor Unit: Inverter Start up Error remote control Display Applicable RXYSQ4~6P Models Method of Malfunction is detected from current flowing in the power transistor. Malfunction Detection Malfunction When overload in the compressor is detected during startup Decision Conditions Supposed...

  • Page 173: Lc" Outdoor Unit: Malfunction Of Transmission Between Inverter And Control Pc Board

    Troubleshooting by Indication on the remote control SiENBE34-703 3.35 “LC” Outdoor Unit: Malfunction of Transmission between Inverter and Control PC Board remote control Display Applicable RXYSQ4~6P Models Method of Check the communication state between inverter PC board and control PC board by micro- computer.

  • Page 174: P1" Outdoor Unit: High Voltage Of Capacitor In Main Inverter Circuit

    SiENBE34-703 Troubleshooting by Indication on the remote control 3.36 “P1 ” Outdoor Unit: High Voltage of Capacitor in Main Inverter Circuit remote control Display Applicable RXYSQ4~6P Models Method of Malfunction is detected according to the voltage waveform of main circuit capacitor built in the inverter.

  • Page 175: Uo" Outdoor Unit: Low Pressure Drop Due To Refrigerant Shortage Or Electronic Expansion Valve Failure

    Troubleshooting by Indication on the remote control SiENBE34-703 3.37 “UO ” Outdoor Unit: Low Pressure Drop Due to Refrigerant Shortage or Electronic Expansion Valve Failure remote control Display Applicable RXYSQ4~6P Models Method of Short of gas malfunction is detected by discharge pipe temperature thermistor and low pressure saturation temperature.
  • Page 176 SiENBE34-703 Troubleshooting by Indication on the remote control Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Low pressureis 0.25 Cooling Out of gas, closing of stop MPaor less. valve or refrigerant system is clogged.

  • Page 177: U2" Power Supply Insufficient Or Instantaneous Failure

    Troubleshooting by Indication on the remote control SiENBE34-703 3.38 “U2 ” Power Supply Insufficient or Instantaneous Failure remote control Display Applicable RXYSQ4~6P Models Method of Detection of voltage of main circuit capacitor built in the inverter and power supply voltage. Malfunction Detection Malfunction...
  • Page 178 SiENBE34-703 Troubleshooting by Indication on the remote control Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Have the power supply voltages between L1 and L2, L2 and L3, and L1 and L3 fallen within Correct the power supply the range of 380 to 415V±10% (50 Hz) and voltages.

  • Page 179: U3" Check Operation Not Executed

    Troubleshooting by Indication on the remote control SiENBE34-703 3.39 “U3 ” Check Operation not Executed remote control Display Applicable RXYSQ4~6P Models Method of Check operation is executed or not Malfunction Detection Malfunction Malfunction is decided when the unit starts operation without check operation. Decision Conditions Supposed...

  • Page 180: U4" Malfunction Of Transmission Between Indoor Units And Outdoor Units

    SiENBE34-703 Troubleshooting by Indication on the remote control 3.40 “U4” Malfunction of Transmission between Indoor Units and Outdoor Units remote control Display Applicable AII indoor unit models Models RXYSQ4~6P Method of Microcomputer checks if transmission between indoor and outdoor units is normal. Malfunction Detection Malfunction...
  • Page 181 Troubleshooting by Indication on the remote control SiENBE34-703 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Has the indoor or outdoor unit PC board been replaced, or has the indoor - outdoor or Push and hold the RESET outdoor - outdoor unit button on the master outdoor...

  • Page 182: U5" Malfunction Of Transmission Between Remote Control And Indoor Unit

    SiENBE34-703 Troubleshooting by Indication on the remote control 3.41 “U5 ” Malfunction of Transmission between remote control and Indoor Unit remote control Display Applicable AII indoor unit models Models Method of In case of controlling with 2-remote control, check the system using microcomputer is signal transmission between indoor unit and remote control (main and sub) is normal.

  • Page 183: U8" Malfunction Of Transmission Between Main And Sub Remote Controls

    Troubleshooting by Indication on the remote control SiENBE34-703 3.42 “U8 ” Malfunction of Transmission between Main and Sub remote controls remote control Display Applicable AII indoor unit models Models Method of In case of controlling with 2-remote control, check the system using microcomputer if signal transmission between indoor unit and remote control (main and sub) is normal.

  • Page 184: U9" Malfunction Of Transmission Between Indoor And Outdoor Units In The Same System

    SiENBE34-703 Troubleshooting by Indication on the remote control 3.43 “U9” Malfunction of Transmission between Indoor and Outdoor Units in the Same System remote control Display Applicable AII indoor unit models Models Method of Malfunction Detection Malfunction Decision Conditions Supposed ! Malfunction of transmission within or outside of other system ! Malfunction of electronic expansion valve in indoor unit of other system Causes ! Defect of PC board of indoor unit in other system...
  • Page 185 Troubleshooting by Indication on the remote control SiENBE34-703 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. "U9" has been displayed for 2 Re-diagnose by display after minutes or more. passage of 2 minutes or more.

  • Page 186: Ua" Excessive Number Of Indoor Units

    SiENBE34-703 Troubleshooting by Indication on the remote control 3.44 “UA ” Excessive Number of Indoor Units remote control Display Applicable AII indoor unit models Models Method of Malfunction Detection Malfunction Decision Conditions Supposed ! Excess of connected indoor units Causes ! Defect of outdoor unit PC board (A1P) ! Mismatching of the refrigerant type of indoor and outdoor unit.

  • Page 187: Uc" Address Duplication Of Central Remote Control

    Troubleshooting by Indication on the remote control SiENBE34-703 3.45 “UC ” Address Duplication of Central remote control Remote Control Display Applicable AII indoor unit models Models Method of Malfunction Detection Malfunction Decision Conditions Supposed ! Address duplication of centralized remote control Causes ! Defect of indoor unit PC board Troubleshooting...

  • Page 188: Ue" Malfunction Of Transmission Between Central Remote Control And Indoor Unit

    SiENBE34-703 Troubleshooting by Indication on the remote control 3.46 “UE ” Malfunction of Transmission between Central remote control and Indoor Unit remote control Display Applicable AII indoor unit models Models Centralized controller Method of Microcomputer checks if transmission between indoor unit and centralized remote control is Malfunction normal.
  • Page 189 Troubleshooting by Indication on the remote control SiENBE34-703 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Has an indoor unit once connected been remove or Reset power supply its address simultaneously for all optional changed?

  • Page 190: Uf" System Is Not Set Yet

    SiENBE34-703 Troubleshooting by Indication on the remote control 3.47 “UF” System is not Set yet remote control Display Applicable All models of indoor units Models RXYSQ4~6P Method of On check operation, the number of indoor units in terms of transmission is not corresponding to that of indoor units that have made changes in temperature.

  • Page 191: Uh" Malfunction Of System, Refrigerant System Address Undefined

    Troubleshooting by Indication on the remote control SiENBE34-703 3.48 “UH ” Malfunction of System, Refrigerant System Address Undefined remote control Display Applicable AII indoor unit models Models RXYSQ4~6P Method of Malfunction Detection Malfunction Decision Conditions Supposed ! Improper connection of transmission wiring between outdoor unit and outdoor unit outside control adapter Causes ! Defect of indoor unit PC board...

  • Page 192: Troubleshooting By Indication On The Centralized Remote Control

    SiENBE34-703 Troubleshooting by Indication on the Centralized remote control 4. Troubleshooting by Indication on the Centralized remote control “UE ” Malfunction of Transmission between Centralized remote control and Indoor Unit remote control Display Applicable AII indoor unit models Models Centralized remote control Method of Microcomputer checks if transmission between indoor unit and central remote control is normal.

  • Page 193: M1" Pc Board Defect

    Troubleshooting by Indication on the Centralized remote control SiENBE34-703 “M1 ” PC Board Defect remote control Display Applicable Centralized remote control Models Method of Malfunction Detection Malfunction Decision Conditions Supposed ! Defect of central remote control PC board Causes Troubleshooting Replace the central remote control PC board.

  • Page 194: M8" Malfunction Of Transmission Between Optional Controllers For Centralized Control

    SiENBE34-703 Troubleshooting by Indication on the Centralized remote control “M8 ” Malfunction of Transmission between Optional Controllers for Centralized Control remote control Display Applicable Centralized remote control Models Method of Malfunction Detection Malfunction Decision Conditions Supposed ! Malfunction of transmission between optional controllers for centralized control ! Defect of PC board of optional controllers for centralized control Causes Troubleshooting...

  • Page 195: Ma" Improper Combination Of Optional Controllers For Centralized Control

    Troubleshooting by Indication on the Centralized remote control SiENBE34-703 “MA ” Improper Combination of Optional Controllers for Centralized Control remote control Display Applicable Centralized remote control Models Method of Malfunction Detection Malfunction Decision Conditions Supposed ! Improper combination of optional controllers for centralized control ! More than one master controller is connected Causes ! Defect of PC board of optional controller for centralized control...
  • Page 196 SiENBE34-703 Troubleshooting by Indication on the Centralized remote control Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Cannot be used in combination with a wiring the wiring adapter for electrical adapter for electrical appendices appendices.

  • Page 197: Mc" Address Duplication, Improper Setting

    Troubleshooting by Indication on the Centralized remote control SiENBE34-703 “MC ” Address Duplication, Improper Setting remote control Display Applicable Centralized remote control Models Method of Malfunction Detection Malfunction Decision Conditions Supposed ! Address duplication of centralized remote control Causes Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred.

  • Page 198: Troubleshooting By Indication On The Unified On/Off Control

    SiENBE34-703 Troubleshooting by Indication on the Unified ON/OFF Control 5. Troubleshooting by Indication on the Unified ON/ OFF Control Operation Lamp Blinks remote control Operation lamp blinks Display Applicable All models of indoor units Models Unified ON/OFF control Method of Malfunction Detection Malfunction...
  • Page 199 Troubleshooting by Indication on the Unified ON/OFF Control SiENBE34-703 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Is a malfunction code displayed on Diagnose the cause with the the remote air conditioner's failure control?

  • Page 200: Display "Under Host Computer Integrate Control" Blinks (Repeats Single Blink)

    SiENBE34-703 Troubleshooting by Indication on the Unified ON/OFF Control Display “Under Host Computer Integrate Control” Blinks (Repeats Single Blink) remote control “under host computer integrated control” (Repeats single blink) Display Applicable Unified ON/OFF control Models Central controller, Schedule timer Method of Malfunction Detection Malfunction...
  • Page 201 Troubleshooting by Indication on the Unified ON/OFF Control SiENBE34-703 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Has a once connected optional controller for centralized control been Reset power supply disconnected or its address simultaneously for all optional changed?
  • Page 202 SiENBE34-703 Troubleshooting by Indication on the Unified ON/OFF Control Is the wiring adapter for Cannot be used in electrical appendices connected? combination with a wiring adapter for electrical appendices. Remove the wiring adapter for electrical appendices and reset the power supply for all optional controllers for centralized control simultaneously.

  • Page 203: Display "Under Host Computer Integrate Control" Blinks (Repeats Double Blink)

    Troubleshooting by Indication on the Unified ON/OFF Control SiENBE34-703 Display “Under Host Computer Integrate Control” Blinks (Repeats Double Blink) remote control “under host computer integrated control” (Repeats double blink) Display Applicable Unified ON/OFF controller Models Method of Malfunction Detection Malfunction Decision Conditions Supposed...
  • Page 204 SiENBE34-703 Troubleshooting by Indication on the Unified ON/OFF Control [CHECK 1] Check for causes of rise in high pressure Referring to the Fault Tree Analysis (FTA) shown below, probe the faulty points. Stop valve closed Check to be sure the stop valve is open. Local High pipe pressure...
  • Page 205 Troubleshooting by Indication on the Unified ON/OFF Control SiENBE34-703 [CHECK 2] Check for causes of drop in low pressure Referring to the Fault Tree Analysis (FTA) shown below, probe the faulty points. [In cooling] Faulty low pressure sensor Are the electrical characteristics normal? Faulty (See *1.) compressor...
  • Page 206 SiENBE34-703 Troubleshooting by Indication on the Unified ON/OFF Control [CHECK 3] Check for Fan Motor Connector (1) Turn the power supply off. (2) With the fan motor connector on motor side disconnected, measure the resistance between each pin, then make sure that the resistance is more than the value mentioned in the following table.
  • Page 207 Troubleshooting by Indication on the Unified ON/OFF Control SiENBE34-703 Troubleshooting...

  • Page 208: Part 8 Appendix

    SiENBE34-703 Part 8 Appendix 1. Piping Diagrams..................198 1.1 Outdoor Unit ..................198 1.2 Indoor Unit....................199 2. Wiring Diagrams..................202 2.1 Outdoor Unit ..................202 2.2 Field Wiring ..................203 2.3 Indoor Unit....................204 3. Option List ...................218 3.1 Option List of Controllers..............218 3.2 Option List of Outdoor Unit..............220 4.

  • Page 209: Piping Diagrams

    Piping Diagrams SiENBE34-703 1. Piping Diagrams Outdoor Unit RXYSQ4 / 5 / 6P7Y1B Appendix...

  • Page 210: Indoor Unit

    SiENBE34-703 Piping Diagrams Indoor Unit FXCQ, FXFQ, FXZQ, FXKQ, FXSQ, FXMQ, FXHQ, FXAQ, FXLQ, FXNQ Gas piping connection port Heat exchanger Flare connection : ø15.9 or less Attached piping : Above ø19.1 Liquid piping connection port (Flare connection) Electronic Filter Filter expansion valve DU220-602J...
  • Page 211 Piping Diagrams SiENBE34-703 FXDQ Gas side Liquid side Electronic expansion valve Filter Filter Indoor heat exchanger 4D043864H ! Refrigerant pipe connection port diameters (mm) Model Liquid φ12.7 φ6.4 FXDQ20 / 25 / 32 / 40 / 50 φ15.9 φ9.5 FXDQ63 Appendix...
  • Page 212 SiENBE34-703 Piping Diagrams FXUQ + BEVQ Indoor Unit Indoor heat exchanger Filter Field piping ø 9.5C1220T-0 To outdoor unit Field piping ø 15.9C1220T-0 Indoor unit 4D037995F Connection Unit Electronic expansion valve Liquid piping Liquid piping connection port connection port Filter Filter Gas piping Gas piping...

  • Page 213: Wiring Diagrams

    Wiring Diagrams SiENBE34-703 2. Wiring Diagrams Outdoor Unit RXYSQ4 / 5 / 6P7Y1B Appendix...

  • Page 214: Field Wiring

    SiENBE34-703 Wiring Diagrams Field Wiring RXYSQ4 / 5 / 6P7Y1B Appendix...

  • Page 215: Indoor Unit

    Wiring Diagrams SiENBE34-703 Indoor Unit FXCQ20 / 25 / 32 / 63M8 Appendix...
  • Page 216 SiENBE34-703 Wiring Diagrams FXCQ40 / 50 / 80 / 125M8V3 Appendix...
  • Page 217 Wiring Diagrams SiENBE34-703 FXFQ25 / 32 / 40 / 50 / 63 / 80 / 100 / 125P7VE Appendix...
  • Page 218 SiENBE34-703 Wiring Diagrams FXZQ20 / 25 / 32 / 40 / 50M8V1 Appendix...
  • Page 219 Wiring Diagrams SiENBE34-703 FXKQ25MA / 32MA / 40MA / 63MAVE Appendix...
  • Page 220 SiENBE34-703 Wiring Diagrams FXDQ20P / 25P / 32P FXDQ20NA / 25NA / 32NA / 40NA / 50NA / 63NAVE (with Drain Pump) Appendix...
  • Page 221 Wiring Diagrams SiENBE34-703 FXDQ20 / 25M8V3 Appendix...
  • Page 222 SiENBE34-703 Wiring Diagrams FXSQ20 / 25 / 32 / 40 / 50 / 63 / 80 / 100 / 125M8V3 Appendix...
  • Page 223 Wiring Diagrams SiENBE34-703 FXMQ40MA / 50MA / 63MA / 80MA / 100MA / 125MAVE Appendix...
  • Page 224 SiENBE34-703 Wiring Diagrams FXHQ32MA / 63MA / 100MAVE Appendix...
  • Page 225 Wiring Diagrams SiENBE34-703 FXAQ20MA / 25MA / 32MAVE / 40MA / 50MA / 63MAVE Appendix...
  • Page 226 SiENBE34-703 Wiring Diagrams FXLQ20MA / 25MA / 32MA / 40MA / 50MA / 63MAVE FXNQ20MA / 25MA / 32MA / 40MA / 50MA / 63MAVE Appendix...
  • Page 227 Wiring Diagrams SiENBE34-703 FXUQ71MA / 100MA / 125MAV1 Appendix...
  • Page 228 SiENBE34-703 Wiring Diagrams BEVQ71MA / 100MA / 125MAVE POWER SUPPLY BEV UNIT Printed circuit board ASSY Power supply Printed circuit board ASSY (220-240V/16V) Fuse ( , 10A, 250V Light emitting diode. (Service monitor green) Thermistor (Gas) Selector switch (M/S) Terminal strip (Power) TO INDOOR UNIT Terminal strip (Transmission)

  • Page 229: Option List

    Option List SiENBE34-703 3. Option List Option List of Controllers Operation Control System Optional Accessories Type FXDQ- FXLQ-MA FXCQ-M8 FXFQ-P7 FXZQ-M8 FXKQ-MA FXUQ-MA FXSQ-M8 FXMQ-MA FXHQ-MA FXAQ-MA NA • M • P FXNQ-MA Item Wireless BRC7C62 BRC7E61W BRC7E61W BRC4C61 BRC4C62 BRC7C528W BRC4C62 BRC7E63W...
  • Page 230 SiENBE34-703 Option List Building management system Part name Model No. Function intelligent • Air-Conditioning management system that can be controlled by a basic Hardware Touch DCS601C51 compact all-in-one unit. Controller DIII-NET Hardware plus DCS601A52 • Additional 64 groups (10 outdoor units) is possible. adapter Option P.P.D.

  • Page 231: Option List Of Outdoor Unit

    Option List SiENBE34-703 Option List of Outdoor Unit RXYSQ4 / 5 / 6P RXYSQ4P7Y1B Optional accessories RXYSQ5P7Y1B RXYSQ6P7Y1B Cool/Heat Selector KRC19-26A Fixing box KJB111A KHRP26M22H, KHRP26M33H Refnet header (MAX. 4 branch) (MAX. 8 branch) Refnet joint KHRP26M22T Central drain plug KKPJ5F180 Fixture for preventing overturning KPT-60B160...
  • Page 232 SiENBE34-703 Option List Appendix...

  • Page 233: Example Of Connection

    Example of Connection SiENBE34-703 4. Example of Connection Branch with refnet joint Example of connection (Connection of 8 indoor units REFNET joint (A-G Outdoor unit Heat pump system) Indoor units (1-8) Pipe length between outdoor and indoor un Actual pipe length Maximum Example unit 8: a + b + c + d + e + f + g + p ≤...
  • Page 234 SiENBE34-703 Example of Connection fnet joint Branch with refnet joint and refnet header Branch with refnet header EFNET joint (A-G) Outdoor unit REFNET joint (A • B) Outdoor unit Refnet header Refnet header (1-8) Indoor units (1-8) Indoor units (1-8) oor and indoor units ≤...
  • Page 235 Example of Connection SiENBE34-703 Appendix...

  • Page 236: Thermistor Resistance / Temperature Characteristics

    SiBE34-703 Thermistor Resistance / Temperature Characteristics 5. Thermistor Resistance / Temperature Characteristics Indoor unit For air suction For liquid pipe For gas pipe Outdoor unit For outdoor air Outdoor unit for fin thermistor For suction pipe 1 For heat exchanger For suction pipe 2 For Subcooling heat exchanger outlet R6T For Liquid pipe...
  • Page 237 Thermistor Resistance / Temperature Characteristics SiBE34-703 Outdoor Unit Thermistors for Discharge Pipe (R2T) (kΩ) T°C T°C T°C 640.44 624.65 72.32 70.96 13.35 13.15 609.31 594.43 69.64 68.34 12.95 12.76 579.96 565.78 67.06 65.82 12.57 12.38 552.00 538.63 64.60 63.41 12.20 12.01 525.63 512.97...

  • Page 238: Pressure Sensor

    SiBE34-703 Pressure Sensor 6. Pressure Sensor = 1.38V-0.69 : Detected Pressure [High Side] MPa = 0.57V-0.28 : Detected Pressure [Low Side] MPa : High pressure (MPa) : Output Voltage [High Side] V Detected Pressure : Low pressure (MPa) : Output Voltage [Low Side] V V : Voltage (V) High Pressure (P Low Pressure (P...

  • Page 239: Method Of Replacing The Inverter's Power Transistors Modules

    Method of Replacing the Inverter’s Power Transistors Modules SiBE34-703 7. Method of Replacing the Inverter’s Power Transistors Modules Checking failures in power semiconductors mounted on inverter PC board Check the power semiconductors mounted on the inverter PC board by the use of a multiple tester.
  • Page 240 SiBE34-703 Method of Replacing the Inverter’s Power Transistors Modules Power module checking When using the digital type of multiple tester, make measurement in diode check mode. Tester terminal Criterion Remark Not less than 0.3V It may take time to (including ∞)* determine the voltage due to capacitor charge or else.
  • Page 241 Method of Replacing the Inverter’s Power Transistors Modules SiBE34-703 Appendix...

  • Page 242: Part 9 Precautions For New Refrigerant (R-410A)

    SiENBE34-703 Part 9 Precautions for New Refrigerant (R-410A) 1. Precautions for New Refrigerant (R-410A) .........232 1.1 Outline ....................232 1.2 Refrigerant Cylinders................234 1.3 Service Tools..................235 Precautions for New Refrigerant (R-410A)

  • Page 243: Precautions For New Refrigerant (R-410A)

    Precautions for New Refrigerant (R-410A) SiENBE34-703 1. Precautions for New Refrigerant (R-410A) Outline 1.1.1 About Refrigerant R-410A ! Characteristics of new refrigerant, R-410A 1. Performance Almost the same performance as R-22 and R-407C 2. Pressure Working pressure is approx. 1.4 times more than R-22 and R-407C. 3.
  • Page 244 SiENBE34-703 Precautions for New Refrigerant (R-410A) ! Thermodynamic characteristic of R-410A Temperature Steam pressure Density Specific heat at constant Specific enthalpy Specific entropy (°C) (kPa) (kg/m pressure (kJ/kgK) (kJ/kg) (kJ/KgK) Liquid Vapor Liquid Vapor Liquid Vapor Liquid Vapor Liquid Vapor Precautions for New Refrigerant (R-410A)

  • Page 245: Refrigerant Cylinders

    Precautions for New Refrigerant (R-410A) SiENBE34-703 Refrigerant Cylinders ! Cylinder specifications 2 The cylinder is painted refrigerant color (pink). 2 The cylinder valve is equipped with a siphon tube. Cylinder Refrigerant can be charged in liquid state with cylinder in upright position.

  • Page 246: Service Tools

    SiENBE34-703 Precautions for New Refrigerant (R-410A) Service Tools R-410A is used under higher working pressure, compared to previous refrigerants (R-22,R-407C). Furthermore, the refrigerating machine oil has been changed from Suniso oil to Ether oil, and if oil mixing is occurred, sludge results in the refrigerants and causes other problems.
  • Page 247 Precautions for New Refrigerant (R-410A) SiENBE34-703 1. Flaring tool Flare gauge ! Specifications 2 Dimension A Unit:mm Tube O.D. -0.4 Nominal size Class-2 (R-410A) Class-1 (Conventional) 6.35 9.52 13.2 13.0 12.70 16.6 16.2 15.88 19.7 19.4 19.05 24.0 23.3 ! Differences 2 Change of dimension A Dimension A For class-1: R-407C...
  • Page 248 SiENBE34-703 Precautions for New Refrigerant (R-410A) 2. Torque wrench ! Specifications 2 Dimension B Unit:mm Nominal size Class-1 Class-2 Previous No change in tightening torque No change in pipes of other sizes ! Differences 2 Change of dimension B Only 1/2", 5/8" are extended For class-1: R-407C For class-2: R-410A Dimension B...
  • Page 249 Precautions for New Refrigerant (R-410A) SiENBE34-703 4. Leak tester ! Specifications 2 Hydrogen detecting type, etc. 2 Applicable refrigerants R-410A, R-407C, R-404A, R-507A, R-134a, etc. ! Differences 2 Previous testers detected chlorine. Since HFCs do not contain chlorine, new tester detects hydrogen.
  • Page 250 SiENBE34-703 Precautions for New Refrigerant (R-410A) 2 Temperature scale indicates the relationship between pressure and temperature in gas saturated state. ! Differences 2 Change in pressure 2 Change in service port diameter 7. Charge hose for R-410A (Hose with ball valve) ! Specifications 2 Working pressure 5.08 MPa (51.8 kg/cm 2 Rupture pressure 25.4 MPa (259 kg/cm...
  • Page 251 Precautions for New Refrigerant (R-410A) SiENBE34-703 9. Weigher for refrigerant charge ! Specifications 2 High accuracy TA101A (for 10-kg cylinder) = ± 2g TA101B (for 20-kg cylinder) = ± 5g 2 Equipped with pressure-resistant sight glass to check liquid refrigerant charging. 2 A manifold with separate ports for HFCs and previous refrigerants is equipped as standard accessories.

  • Page 252: Part 10 Removal Procedure

    SiENBE34-703 Part 10 Removal Procedure 1. RXYSQ4 · 5 · 6 P7Y1B ...............240 1.1 Procedure to Remove Outside Panels ..........240 1.2 Procedure to Remove Propeller Fan and Fan Motor ......243 1.3 Procedure to Remove Compressor............245 Removal Procedure...

  • Page 253: Rxysq4 · 5 · 6 P7Y1B

    RXYSQ4 · 5 · 6 P7Y1B SiENBE34-703 1. RXYSQ4 · 5 · 6 P7Y1B Procedure to Remove Outside Panels Procedure Warning Be sure to commence the disassembling work after 10 minutes or more elapsed from all power supplies have been turned off. Step Procedure Points...
  • Page 254 SiENBE34-703 RXYSQ4 · 5 · 6 P7Y1B Procedure Points Step Remove the discharge grill after removing its Front panel (1) Hook four screws and releasing its four hooks. Discharge grill ! On the rear side of the front panel (1), a reinforce plate is attached.
  • Page 255 RXYSQ4 · 5 · 6 P7Y1B SiENBE34-703 Procedure Points Step Removing heat exchanger cover Remove the heat exchanger cover after releasing its three hooks with a minus driver. Remove the ambient air Ambient air temperature temperature thermistor thermistor after pulling it to the (RIT) near side and sliding to the right.

  • Page 256: Procedure To Remove Propeller Fan And Fan Motor

    SiENBE34-703 RXYSQ4 · 5 · 6 P7Y1B Procedure to Remove Propeller Fan and Fan Motor Procedure Warning Be sure to commence the disassembling work after 10 minutes or more elapsed from all power supplies have been turned off. Procedure Points Step Preliminary preparation ! Remove the discharge grill,...
  • Page 257 RXYSQ4 · 5 · 6 P7Y1B SiENBE34-703 Procedure Points Step Lead wire for fan motor Remove the clamp ! Pull off the connector while material. supporting its body and pushing the engaging click, Earth wire without pulling its lead wires. Remove the four fixing ! Caution on mounting the screws for fan motor...

  • Page 258: Procedure To Remove Compressor

    SiENBE34-703 RXYSQ4 · 5 · 6 P7Y1B Procedure to Remove Compressor Procedure Warning Be sure to commence the disassembling work after 10 minutes or more elapsed from all power supplies have been turned off. Procedure Points Step ! Remove the outside panels, electrical Sound insulation for the terminal cover component, and...
  • Page 259 RXYSQ4 · 5 · 6 P7Y1B SiENBE34-703 Procedure Points Step Remove the sound insulation for the compressor. Remove the crankcase heater under the compressor. Pull the spring to trip the catch. Remove the three fixing ! You can see the far side bolts of the compressor.
  • Page 260 SiENBE34-703 RXYSQ4 · 5 · 6 P7Y1B Procedure Points Step ! Make sure that there is no ! The cutting part is in the refrigerant gas left within compressor side relative to the refrigerant circuit the brazing part. system before performing ! Preliminarily cut off with a the operation gas welder, a part of the...
  • Page 261 RXYSQ4 · 5 · 6 P7Y1B SiENBE34-703 Removal Procedure...

  • Page 262: Index

    SiENBE34-703 Index A0 .................122 F3 ................ 147 A1 .................123 F6 ................ 148 A3 .................124 Fan Motor (M1F) Lock, Overload ......126 A6 .................126 Field Setting ............71 A7 .................127 Field Setting from Outdoor Unit ......84 A9 .................129 Field Setting from Remote Control ......71 Abnormal Discharge Pipe Temperature ....147 Filter Sign Setting ..........
  • Page 263 SiENBE34-703 Malfunction of Low Pressure Sensor ....156 Protection Control ..........52 Malfunction of Moving Part of Electronic Pump-down Residual Operation ......49 Expansion Valve (Y1E) .........129 Malfunction of Moving Part of Electronic Expansion Valve (Y1E, Y3E) ......145 Refrigerant Circuit ..........36 Malfunction of Outdoor Unit Fan Motor ....144 Refrigerant Cylinders ..........

  • Page 264: Drawings & Flow Charts

    SiENBE34-703 Drawings & Flow Charts abnormal discharge pipe temperature ....147 improper combination of optional controllers actuation of high pressure switch ......139 for centralized control ........184 actuation of low pressure sensor ......141 inverter compressor abnormal ......159 address duplication of central remote control ..176 inverter current abnormal ........
  • Page 265 SiENBE34-703 malfunction of transmission between optional controllers for centralized control ....183 malfunction of transmission between remote control and indoor unit ........171 method of replacing the inverter’s power transistors modules ........228 operation lamp blinks ...........187 operation mode ............40 operation of the remote control’s inspection / test operation button ........112 outdoor unit pc board layout ........70 pc board defect ........123, 138, 182...
  • Page 266 Specifications are subject to change without environment. This challenge demands the eco design prior notice. Daikin Europe N.V. explicitly rejects any liability for any direct or and development of a wide range of products and an indirect damage, in the broadest sense, arising from or related to the use energy management system, resulting in energy and/or interpretation of this publication.

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