Page 1 SiUS39 - 602 REYQ72, 96, 144, 168, 192MTJU R-410A Heat Recovery 60Hz REYQ72MTJU REYQ96MTJU REYQ144MTJU REYQ168MTJU REYQ192MTJU...
Page 2: Table Of Contents
SiUS39-602 R-410A Heat Recovery 60Hz 1. Introduction .................... vi 1.1 Safety Cautions..................vi 1.2 PREFACE ....................x Part 1 General Information............1 1. Model Names of Indoor/Outdoor Units ...........2 External Appearance ................3 2.1 Indoor Units....................3 2.2 Outdoor Units ................... 3 3.
Page 3 SiUS39-602 Oil Return Operation ................50 Defrosting Operation ................52 3.4 Pressure Equalizing Control ..............53 Pump-down Residual Operation ............54 Restart Standby ..................56 Stopping Operation ................57 Protection Control .................59 High Pressure Protection Control ............59 Low Pressure Protection Control ............60 Discharge Pipe Protection Control ............
Page 4 SiUS39-602 2.6 “A9” Indoor Unit: Malfunction of Moving Part of Electronic Expansion Valve (20E)............134 2.7 “AF” Indoor Unit: Drain Level above Limit ..........136 2.8 “AJ” Indoor Unit: Malfunction of Capacity Determination Device..137 2.9 “C4” Indoor Unit: Malfunction of Thermistor (R2T) for Heat Exchanger ................
Page 5 SiUS39-602 2.41 “PJ” Outdoor Unit: Faulty Field Setting after Replacing Main PC Board or Faulty Combination of PC Board........173 2.42 “UO” Outdoor Unit: Low Pressure Drop due to Refrigerant Shortage or Electronic Expansion Valve Failure........174 2.43 “U1” Outdoor Unit: Reverse Phase, Open Phase ........175 2.44 “U2”...
Page 6 SiUS39-602 Part 7 Replacement Procedure for INV Compressor, VRV (REYQ72M, 96M)............ 215 Replacement Procedure for INV Compressor, VRV (REYQ72M, 96M) ...............216 1.1 Replacement Procedure ..............216 Part 8 Appendix ................ 217 1. Piping Diagrams..................218 1.1 Outdoor Unit..................218 1.2 Indoor Unit ................... 219 1.3 BS Unit ....................
Page 7: Introduction
Introduction SiUS39-602 1. Introduction Safety Cautions Cautions and Be sure to read the following safety cautions before conducting repair work. The caution items are classified into “ Warning” and “ Caution”. The “ Warning” Warnings items are especially important since they can lead to death or serious injury if they are not followed closely.
Page 8: Cautions Regarding Products After Repair
SiUS39-602 Introduction Caution Do not repair the electrical components with wet hands. Working on the equipment with wet hands can cause an electrical shock. Do not clean the air conditioner by splashing water. Washing the unit with water can cause an electrical shock. Be sure to provide the grounding when repairing the equipment in a humid or wet place, to avoid electrical shocks.
Page 9: Inspection After Repair
Introduction SiUS39-602 Warning Be sure to use an exclusive power circuit for the equipment, and follow the technical standards related to the electrical equipment, the internal wiring regulations and the instruction manual for installation when conducting electrical work. Insufficient power circuit capacity and improper electrical work can cause an electrical shock or fire.
Page 10: Using Icons
SiUS39-602 Introduction Warning If the power cable and lead wires have scratches or deteriorated, be sure to replace them. Damaged cable and wires can cause an electrical shock, excessive heat generation or fire. Do not use a joined power cable or extension cable, or share the same power outlet with other electrical appliances, since it can cause an electrical shock, excessive heat generation or fire.
Page 11: Preface
This is the new service manual for Daikin's Year 2006 VRV series Heat Recovery System. Daikin offers a wide range of models to respond to building and office air conditioning needs. We are confident that customers will be able to find the models that best suit their needs.
Page 12: Part 1 General Information
SiUS39-602 Part 1 General Information 1. Model Names of Indoor/Outdoor Units ...........2 External Appearance ................3 2.1 Indoor Units....................3 2.2 Outdoor Units ................... 3 3. Model Selection ..................4 General Information...
Page 13: Model Names Of Indoor/Outdoor Units
Model Names of Indoor/Outdoor Units SiUS39-602 1. Model Names of Indoor/Outdoor Units Indoor Units Type Model Name Power Supply Ceiling Mounted Cassette Type FXFQ — — — (Multi Flow) Slim Ceiling Mounted FXDQ — — — Duct Type Ceiling Mounted FXSQ —...
Page 14: External Appearance
SiUS39-602 External Appearance External Appearance Indoor Units Ceiling mounted cassette type (Multi flow) Wall mounted type FXFQ12MVJU FXAQ07MVJU FXFQ18MVJU FXAQ09MVJU FXFQ24MVJU FXAQ12MVJU FXFQ30MVJU FXAQ18MVJU FXFQ36MVJU FXAQ24MVJU Slim ceiling mounted duct type Floor standing type FXDQ07MVJU FXLQ12MVJU FXDQ09MVJU FXLQ18MVJU FXDQ12MVJU FXLQ24MVJU FXDQ18MVJU FXDQ24MVJU Ceiling mounted built-in type...
Page 15: Model Selection
Model Selection SiUS39-602 3. Model Selection VRV Heat Recovery Series Connectable indoor units number and capacity 6ton 8ton 12ton 14ton 16ton System name REYQ72M REYQ96M REYQ144M REYQ168M REYQ192M Outdoor unit 1 REYQ72M REYQ96M REYQ72M REYQ72M REYQ96M — — Outdoor unit 2 REYQ72M REYQ96M REYQ96M...
Page 16: Part 2 Specifications
SiUS39-602 Part 2 Specifications 1. Specifications..................6 1.1 Outdoor Units ................... 6 Indoor Units.................... 11 1.3 BS Units ....................23 Specifications...
Page 17: Specifications
Specifications SiUS39-602 1. Specifications Outdoor Units Model Name REYQ72MTJU ★ 1 Cooling Capacity Btu / h 72,000 ★ 2 Heating Capacity Btu / h 81,000 Casing Color Ivory White (5Y7.5/1) Dimensions: (H×W×D) 64 × 48-7/8 × 30-1/8 Heat Exchanger Cross Fin Coil Type Hermetically Sealed Scroll Type Piston Displacement...
Page 18 SiUS39-602 Specifications Model Name REYQ96MTJU ★ 1 Cooling Capacity Btu / h 96,000 ★ 2 Heating Capacity Btu / h 108,000 Casing Color Ivory White (5Y7.5/1) Dimensions: (H×W×D) 64 × 48-7/8 × 30-1/8 Heat Exchanger Cross Fin Coil Type Hermetically Sealed Scroll Type Piston Displacement m³/h 13.72+10.47...
Page 19 Specifications SiUS39-602 Model Name (Combination Unit) REYQ144MTJU Model Name (Independent Unit) REYQ72MTJU+REYQ72MTJU ★ 1 Cooling Capacity Btu / h 144,000 ★ 2 Heating Capacity Btu / h 162,000 Casing Color Ivory White (5Y7.5/1) Dimensions: (H×W×D) (64 × 48-7/8 × 30-1/8) + (64 × 48-7/8 × 30-1/8) Heat Exchanger Cross Fin Coil Type...
Page 20 SiUS39-602 Specifications Model Name (Combination Unit) REYQ168MTJU Model Name (Independent Unit) REYQ72MTJU+REYQ96MTJU ★ 1 Cooling Capacity Btu / h 168,000 ★ 2 Heating Capacity Btu / h 189,000 Casing Color Ivory White (5Y7.5/1) Dimensions: (H×W×D) (64 × 48-7/8 × 30-1/8) + (64 × 48-7/8 × 30-1/8) Heat Exchanger Cross Fin Coil Type...
Page 21 Specifications SiUS39-602 Model Name (Combination Unit) REYQ192MTJU Model Name (Independent Unit) REYQ96MTJU+REYQ96MTJU ★ 1 Cooling Capacity Btu / h 192,000 ★ 2 Heating Capacity Btu / h 216,000 Casing Color Ivory White (5Y7.5/1) Dimensions: (H×W×D) (64 × 48-7/8 × 30-1/8) + (64 × 48-7/8 × 30-1/8) Heat Exchanger Cross Fin Coil Type...
Page 22: Indoor Units
SiUS39-602 Specifications Indoor Units Ceiling Mounted Cassette Type (Multi-flow) Model FXFQ12MVJU FXFQ18MVJU FXFQ24MVJU ★ 1 Cooling Capacity Btu/h 12,000 18,000 24,000 ★ 2 Heating Capacity Btu/h 13,500 20,000 27,000 Casing / Color Galvanized Steel Plate Galvanized Steel Plate Galvanized Steel Plate Dimensions: (H×W×D) 9-1/8 ×...
Page 23 Specifications SiUS39-602 Ceiling Mounted Cassette Type (Multi-flow) Model FXFQ30MVJU FXFQ36MVJU ★ 1 Cooling Capacity Btu/h 30,000 36,000 ★ 2 Heating Capacity Btu/h 34,000 40,000 Casing / Color Galvanized Steel Plate Galvanized Steel Plate Dimensions: (H×W×D) 11-3/8 × 33-1/8 × 33-1/8 11-3/8 ×...
Page 24 SiUS39-602 Specifications Slim Ceiling Mounted Duct Type Model FXDQ07MVJU FXDQ09MVJU FXDQ12MVJU ★ 1 Cooling Capacity Btu/h 7,500 9,500 12,000 ★ 2 Heating Capacity Btu/h 8,500 10,500 13,500 Casing / Color Galvanized Steel Plate Galvanized Steel Plate Galvanized Steel Plate Dimensions: (H×W×D) 7-7/8 ×...
Page 25 Specifications SiUS39-602 Slim Ceiling Mounted Duct Type Model FXDQ18MVJU FXDQ24MVJU ★ 1 Cooling Capacity Btu/h 18,000 24,000 ★ 2 Heating Capacity Btu/h 20,000 27,000 Casing / Color Galvanized Steel Plate Galvanized Steel Plate Dimensions: (H×W×D) 7-7/8 × 35-7/16 × 24-7/16 7-7/8 ×...
Page 26 SiUS39-602 Specifications Ceiling Mounted Built-in Type Model FXSQ12MVJU FXSQ18MVJU FXSQ24MVJU ★ 1 Cooling Capacity Btu/h 12,000 18,000 24,000 ★ 2 Heating Capacity Btu/h 13,500 20,000 27,000 Casing / Color Galvanized Steel Plate Galvanized Steel Plate Galvanized Steel Plate Dimensions: (H×W×D) 11-7/8 ×...
Page 27 Specifications SiUS39-602 Ceiling Mounted Built-in Type Model FXSQ30MVJU FXSQ36MVJU FXSQ48MVJU ★ 1 Cooling Capacity Btu/h 30,000 36,000 48,000 ★ 2 Heating Capacity Btu/h 34,000 40,000 54,000 Casing / Color Galvanized Steel Plate Galvanized Steel Plate Galvanized Steel Plate Dimensions: (H×W×D) 11-7/8 ×...
Page 28 SiUS39-602 Specifications Ceiling Mounted Duct Type Model FXMQ30MVJU FXMQ36MVJU FXMQ48MVJU ★ 1 Cooling Capacity Btu/h 30,000 36,000 48,000 ★ 2 Heating Capacity Btu/h 34,000 40,000 54,000 Casing / Color Galvanized Steel Plate Galvanized Steel Plate Galvanized Steel Plate Dimensions: (H×W×D) 15-3/8 ×...
Page 29: Ceiling Suspended Type
Specifications SiUS39-602 Ceiling Suspended Type Model FXHQ12MVJU FXHQ24MVJU FXHQ36MVJU ★ 1 Cooling Capacity Btu/h 12,000 24,000 36,000 ★ 2 Heating Capacity Btu/h 13,500 27,000 40,000 Casing Color White (10Y9/0.5) White (10Y9/0.5) White (10Y9/0.5) Dimensions: (H×W×D) 7-11/16×37-13/16×26-3/4 7-11/16×55-1/8×26-3/4 7-11/16×62-5/8×26-3/4 Rows × Stages × FPI 2×12×15 3×12×15 2×12×15+2×10×15...
Page 30: Wall Mounted Type
SiUS39-602 Specifications Wall Mounted Type Model FXAQ07MVJU FXAQ09MVJU FXAQ12MVJU ★ 1 Cooling Capacity Btu/h 7,500 9,500 12,000 ★ 2 Heating Capacity Btu/h 8,500 10,500 13,500 Casing Color White (3.0Y8.5/0.5) White (3.0Y8.5/0.5) White (3.0Y8.5/0.5) Dimensions: (H×W×D) 11–3/8×31–1/4×9 11–3/8×31–1/4×9 11–3/8×31–1/4×9 Rows × Stages × FPI 2×14×17 2×14×17 2×14×17...
Page 31 Specifications SiUS39-602 Wall Mounted Type Model FXAQ18MVJU FXAQ24MVJU ★ 1 Cooling Capacity Btu/h 18,000 24,000 ★ 2 Heating Capacity Btu/h 20,000 27,000 Casing Color White (3.0Y8.5/0.5) White (3.0Y8.5/0.5) Dimensions: (H×W×D) 11–3/8×41–3/8×9 11–3/8×41–3/8×9 Rows × Stages × FPI 2×14×17 2×14×17 Coil (Cross Fin Coil) Face Area ft²...
Page 32: Floor Standing Type
SiUS39-602 Specifications Floor Standing Type Model FXLQ12MVJU FXLQ18MVJU FXLQ24MVJU ★ 1 Cooling Capacity Btu/h 12,000 18,000 24,000 ★ 2 Heating Capacity Btu/h 13,500 20,000 27,000 Casing Color Ivory White (5Y7.5/1) Ivory White (5Y7.5/1) Ivory White (5Y7.5/1) Dimensions: (H×W×D) 23–5/8×44–7/8×8–3/4 23–5/8×55–7/8×8–3/4 23–5/8×55–7/8×8–3/4 Rows ×...
Page 33 Specifications SiUS39-602 Concealed Floor Standing Type Model FXNQ12MVJU FXNQ18MVJU FXNQ24MVJU ★ 1 Cooling Capacity Btu/h 12,000 18,000 24,000 ★ 2 Heating Capacity Btu/h 13,500 20,000 27,000 Casing Color Galvanized Steel Plate Galvanized Steel Plate Galvanized Steel Plate Dimensions: (H×W×D) 24×42–1/8×8–5/8 24×53–1/8×8–5/8 24×53–1/8×8–5/8 Rows ×...
Page 34: Bs Units
SiUS39-602 Specifications BS Units Model BSVQ36MVJU BSVQ60MVJU Power Supply 60Hz 208~230V 60Hz 208~230V Total Capacity Index of Connectable Indoor Less than 36 Less than 60 Unit No. of Connectable Indoor Units Max. 3 Max. 5 Casing Galvanized Steel Plate Galvanized Steel Plate Dimensions: (H×W×D) 7-1/4 ×...
Page 35 Specifications SiUS39-602 Specifications...
Page 36: Part 3 Refrigerant Circuit
SiUS39-602 Part 3 Refrigerant Circuit Refrigerant Circuit .................26 REYQ72M, 96M ..................26 1.2 BSVQ36, 60M ..................28 Functional Parts Layout ................29 REYQ72M, 96M ..................29 3. Refrigerant Flow for Each Operation Mode ..........31 Refirgerant Circuit...
Page 37: Refrigerant Circuit
Refrigerant Circuit SiUS39-602 Refrigerant Circuit REYQ72M, 96M No. in refrigerant Symbol Name Major Function system diagram Inverter compressor (INV) Inverter compressor is operated on frequencies between 52 Hz and 210 Hz by using the inverter, while Standard compressor is operated with commercial power supply only.
Page 38 SiUS39-602 Refrigerant Circuit REYQ72M, 96M 4D045329A Refirgerant Circuit...
Page 39: Bsvq36, 60M
Refrigerant Circuit SiUS39-602 BSVQ36, 60M Symbol Name Major function Solenoid valve (20RT) Used to sub-cool the liquid refrigerant Solenoid valve (20RH) Used to changeover the cooling and heating operation of indoor units Used to lower the pressure and temperature of high pressure and high —...
Page 40: Functional Parts Layout
SiUS39-602 Functional Parts Layout Functional Parts Layout REYQ72M, 96M 2.1.1 Functional Parts Layout (Solenoid Valve etc.) Plan Solenoid valve (Receiver gas discharge Y4S) Front view Solenoid valve (Oil equalizing of multi outdoor system Y2S) Fan motor M1F Solenoid valve (Hot gas Y1S) Solenoid valve (Receiver gas changing Y3S) 4 way valve...
Page 41: Front View
Functional Parts Layout SiUS39-602 2.1.2 Sensor, Pressure Switch Relating Plan Thermistor (Receiver outlet liquid pipe) Front View Thermistor (Sub heat exchanger gas pipe) R82T Pressure sensor (High pressure) S1NPH Thermistor (Sub cooling heat exchanger outlet) Pressure switch Thermistor (High pressure INV) S1PH (Main heat exchanger gas pipe) R81T...
Page 42: Refrigerant Flow For Each Operation Mode
SiUS39-602 Refrigerant Flow for Each Operation Mode 3. Refrigerant Flow for Each Operation Mode Cooling Operation Refirgerant Circuit...
Page 43 Refrigerant Flow for Each Operation Mode SiUS39-602 Simultaneous Cooling/Heating Operation-MODE A Refirgerant Circuit...
Page 44 SiUS39-602 Refrigerant Flow for Each Operation Mode Simultaneous Cooling/Heating Operation-MODE B Refirgerant Circuit...
Page 45 Refrigerant Flow for Each Operation Mode SiUS39-602 Heating or Simultaneous Cooling/Heating Operation-MODE C (In case there are indoor units operating with cooling thermostat “ON”.) Refirgerant Circuit...
Page 46 SiUS39-602 Refrigerant Flow for Each Operation Mode Heating or Simultaneous Cooling/Heating Operation-MODE C (In case there are indoor units operating all heating or not operation by cooling thermostat “OFF”.) Refirgerant Circuit...
Page 47 Refrigerant Flow for Each Operation Mode SiUS39-602 Oil Return or Defrost Operation Refirgerant Circuit...
Page 48: Part 4 Function
SiUS39-602 Part 4 Function 1. Function General ..................38 1.1 Symbol ....................38 1.2 Operation Mode ..................39 2. Basic Control..................40 2.1 Normal Operation................... 40 2.2 Compressor PI Control ................41 2.3 Electronic Expansion Valve PI Control ..........45 2.4 Cooling Operation Fan Control .............. 46 2.5 Heat Exchange Mode in Heating Operation or Simultaneous Cooling / Heating Operation..............
Page 49: Function General
Function General SiUS39-602 Function General Symbol Symbol Electric symbol Name and function 20S1 (Y1R) Fore way changeover valve (Main) 20S2 (Y2R) Fore way changeover valve (Sub) (—) Discharge pipe superheated degree DSHi (—) Discharge pipe superheated degree of inverter compressor DSHs (—) Discharge pipe superheated degree of standard compressor...
Page 50: Operation Mode
SiUS39-602 Function General Operation Mode Operation in stop mode Indoor unit stop or Indoor unit thermostat ON thermostat OFF Malfunction/Standby Restart standby Pressure (Compressor stop) equalization prior to startup Malfunction/ Standby Indoor unit stop or thermostat OFF Startup control • Cooling startup Pump-down control residual...
Page 51: Basic Control
Basic Control SiUS39-602 Basic Control Normal Operation Cooling Operation Actuator Operation Remarks Used for high pressure control, low pressure protection control,discharge pipe temperature Compressor Compressor PI control protection control, and compressor operating frequency upper limit control with inverter protection control. ...
Page 52: Compressor Pi Control
SiUS39-602 Basic Control Compressor PI Control Compressor PI Control Carries out the compressor capacity PI control to maintain Te at constant during cooling operation and Tc at constant during heating operation to ensure stable unit performance. [Cooling operation] Controls compressor capacity to adjust Te to Te : Low pressure equivalent saturation temperature achieve target value (TeS).
Page 53 Basic Control SiUS39-602 Compressor Operating Priority Each compressor operates in the following order of priority. INV: Inverter compressor STD1: Standard compressor 1 REYQ72M REYQ96M No. 1 No. 2 No. 1 No. 2 STD1 STD1 REYQ72M REYQ96M STEP STD1 STEP STD1 52Hz 52Hz 57Hz...
Page 54 SiUS39-602 Basic Control Compressor Operating Priority Each compressor operates in the following order of priority. INV: Inverter compressor STD1: Standard compressor 1 REYQ144M REYQ168M No. 1 No. 3 No. 2 No. 4 No. 1 No. 3 No. 2 No. 4 No.
Page 55 Basic Control SiUS39-602 Compressor Operating Priority Each compressor operates in the following order of priority. INV: Inverter compressor STD1: Standard compressor 1 REYQ192M No. 1 No. 3 No. 2 No. 4 No. 2 No. 4 No. 1 No. 3 STD1 STD1 REYQ192M STEP...
Page 56: Electronic Expansion Valve Pi Control
SiUS39-602 Basic Control Electronic Expansion Valve PI Control Main Motorized Valve EV1 Control, Sub Motorized Valve EV2 Control Carries out the motorized valve (Y1E, Y2E) 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 57: Cooling Operation Fan Control
Basic Control SiUS39-602 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. Pc: HP pressure sensor detection value Upper limit of fan revolutions: Step 8 <...
Page 58: Heat Exchange Mode In Heating Operation Or Simultaneous Cooling / Heating Operation
SiUS39-602 Basic Control Heat Exchange Mode in Heating Operation or Simultaneous Cooling / Heating Operation In heating or simultaneous cooling / heating operation, a target condensing and evaporating temperature can be secured by switching the air heat exchanger of the outdoor unit (main, sub) into evaporator or condenser with load.
Page 59: Special Control
Special Control SiUS39-602 Special Control Startup Control This startup control is used to provide the following control to reduce the compressor load resulting from liquid return or else during compressor startup, and also determine the position of four way valves. 3.1.1 Startup Control in Cooling Operation Starting control Pressure equalization...
Page 60 SiUS39-602 Special Control 3.1.2 Startup Control in Heating Operation Starting control Pressure equalization Actuator before start-up Step1 Step2 Compressor 52Hz + OFF 52Hz + OFF Outdoor unit fan STEP 4 STEP 7 STEP 7 Four way valve 1 Four way valve 2 Hold Hold Main motorized valve (EV1)
Page 61: Oil Return Operation
Special Control SiUS39-602 Oil Return Operation In order to prevent the running-out of refrigerating machine oil in the compressor, the oil flowing out from the compressor to the system side is collected through the oil return operation. 3.2.1 Oil Return Operation in Cooling Operation [Starting conditions] Start oil return operation in cooling operation referring to the following conditions.
Page 62 SiUS39-602 Special Control 3.2.2 Oil Return Operation in Heating Operation [Starting conditions] Start oil return operation in heating operation referring to the following conditions. Cumulative compressor operating time after power supply turns on exceeds 2 hours and the time after the completion of previous oil return operation exceeds 8 hours. And cumulative oil return is calculated based on Tc, Te compressor load.
Page 63: Defrosting Operation
Special Control SiUS39-602 Defrosting Operation In order to melt the frost accumulated on the heat exchanger during heating operation, Defrost operation is performed to restore the heating capacity. [Starting conditions] Start defrosting operation referring to the following conditions. * Heat conductivity of outdoor heat exchangers * Heat exchange temperature (Tb) * Timer (Min.
Page 64: Pressure Equalizing Control
SiUS39-602 Special Control Pressure Equalizing Control This pressure equalization control is used to equalize the pressure of discharge piping and suction piping in order to reduce refrigerant passing noise when changing over the BS units. [Starting conditions] The temperature control of indoor units with thermostat ON does not match up with the state of the BS unit changeover valve to which the indoor units are connected.
Page 65: Pump-Down Residual Operation
Special Control SiUS39-602 Pump-down Residual Operation If any liquid refrigerant remains in the heat exchanger during compressor startup, the liquid refrigerant will enter the compressor, resulting in the dilution of the refrigerating machine oil in the compressor and the degradation of lubricating capacity. Therefore, before the compressor stops, pump-down operation is performed to collect the refrigerant in the heat exchanger.
Page 66 SiUS39-602 Special Control 3.5.2 Pump-down Residual Operation in Heating Operation Actuator Operation Compressor 124 Hz + OFF Outdoor unit fan STEP8 Four way valve 1 Holds *Note 1 Four way valve 2 Holds *Note 1 Four way valve 1 Main motorized valve (EV1) OFF:1400 pls ON:0 pls Four way valve 2...
Page 67: Restart Standby
Special Control SiUS39-602 Restart Standby Forced standby is performed to prevent frequent repetition of ON/OFF of the compressor, and to equalize pressure in the refrigerant system. Actuator Operation Compressor Ta > 86°F: STEP5 Outdoor unit fan Ta ≤ 86°F: OFF Four way valve 1 Holds *Note 1 Four way valve 2...
Page 68: Stopping Operation
SiUS39-602 Special Control Stopping Operation This operation is used to define the operation of the actuator while the system stops. 3.7.1 When System is in Stop Mode Actuator Operation Compressor Outdoor unit fan Four way valve 1 Holds *Note 1 Four way valve 2 Holds *Note 1 Main motorized valve (EV1)
Page 69 Special Control SiUS39-602 3.7.2 Stopping Operation of Slave Units During Master Unit is in Operation With Multi-Outdoor-Unit System In cooling operation: The system operates in Mode A or Mode B listed in the table below. Actuator Mode-A operation Mode-B operation Compressor Outdoor unit fan STEP4...
Page 70: Protection Control
SiUS39-602 Protection Control Protection Control High Pressure Protection Control This high pressure protection control is used to prevent the activation of protection devices due to abnormal increase of high pressure and to protect compressors against the transient increase of high pressure. [In cooling operation] High pressure not limited Pc: HP pressure sensor detection...
Page 71: Low Pressure Protection Control
Protection Control SiUS39-602 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 for master unit Pe<50 psi Pe>58 psi Low pressure limited...
Page 72: Discharge Pipe Protection Control
SiUS39-602 Protection Control Discharge Pipe Protection Control This discharge pipe protection control is used to protect the compressor internal temperature against a malfunction or transient increase of discharge pipe temperature. ★ Each compressor performs the discharge pipe temperature protection control individually in the following sequence.
Page 73: Inverter Protection Control
Protection Control SiUS39-602 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 25 A 26.1 A Inverter current >Ia Inverter current <Ia...
Page 74: Std Compressor Overload Protection
SiUS39-602 Protection Control STD Compressor Overload Protection This control is used to prevent abnormal heating due to overcurrent to the compressor resulting from failures of STD compressor such as locking. current > 30A OC function STD compressor ON →MgS off MgS Reset Demand to operate.
Page 75: Other Control
Other Control SiUS39-602 Other Control Outdoor Unit Rotation In the case of multi-outdoor-unit system, this outdoor unit rotation is used to prevent the compressor from burning out due to unbalanced oil level between outdoor units. [Details of outdoor unit rotation] In the case of multi-outdoor-unit system, each outdoor unit is given an operating priority for the control.
Page 76: Emergency Operation
SiUS39-602 Other Control Emergency Operation If the compressor cannot operate, this control inhibits any applicable compressor or outdoor unit from operating to perform emergency operation only with the operative compressor or outdoor unit. Caution "For making a compressor unable to operate due to malfunction, etc., be sure to conduct the work with emergency operation setting.
Page 77 Other Control SiUS39-602 5.2.3 In The Case of Multi-Outdoor-Unit System (REYQ144, 168, 192MTJU) Automatic backup operation With multi-outdoor-unit system, if a certain outdoor unit system malfunctions (i.e., the system stops and indoor unit remote controller displays the malfunction), by resetting the system with the indoor unit remote controller, the applicable outdoor unit is inhibited from operating for 8 hours, thus making it possible to perform emergency operation automatically.
Page 78: Demand Operation
SiUS39-602 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” or “Demand 2 Setting”. To operate the unit with this mode, additional setting of “Continuous Demand Setting” or external input by external control adapter is required.
Page 79: Outline Of Control (Indoor Unit)
Outline of Control (Indoor Unit) SiUS39-602 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 * 1.
Page 80 SiUS39-602 Outline of Control (Indoor Unit) 6.1.3 When the Float Switch is Tripped During Heating Operation: During heating operation, if the float switch is not reset even after the 5 minutes operation, 5 seconds stop, 5 minutes operation cycle ends, operation continues until the switch is reset. 6.1.4 When the Float Switch is Tripped and “AF”...
Page 81: Thermostat Sensor In Remote Controller
Outline of Control (Indoor Unit) SiUS39-602 Thermostat Sensor in Remote Controller Temperature is controlled by both the thermostat sensor in remote controller and air suction thermostat in the indoor unit. (This is however limited to when the field setting for the thermostat sensor in remote controller is set to “Use.”) Cooling If there is a significant difference in the preset temperature and the suction temperature, fine...
Page 82 SiUS39-602 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 83: Freeze Prevention
Outline of Control (Indoor Unit) SiUS39-602 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 84: Part 5 Test Operation
SiUS39-602 Part 5 Test Operation Test Operation ..................74 Procedure and Outline ................74 Operation When Power is Turned On ............ 77 Outdoor Unit PC Board Layout .............78 Field Setting ..................79 3.1 Field Setting from Remote Controller............. 79 3.2 Field Setting from Outdoor Unit ............. 91 Test Operation...
Page 85: Test Operation
Test Operation SiUS39-602 Test Operation Procedure and Outline Follow the following procedure to conduct the initial test operation after installation. 1.1.1 Check Work Prior to Turn Power Supply On Is the wiring performed as specified? Check the below items. Are the designated wires used? 2Power wiring Is the grounding work completed? 2Control transmission wiring...
Page 86: Check Operation
SiUS39-602 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.) The test operation is started automatically. Press and hold the TEST ...
Page 87 Test Operation SiUS39-602 Malfunction code In case of an alarm code displayed on remote controller: Cause of trouble due to faulty Alarm Countermeasure installation work code Closed stop valve of outdoor unit Liquid side stop valve : Open Gas side stop valve : Open Oil equalizing pipe stop valve : Close Liquid side stop valve...
Page 88: Operation When Power Is Turned On
SiUS39-602 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 89: Outdoor Unit Pc Board Layout
Outdoor Unit PC Board Layout SiUS39-602 Outdoor Unit PC Board Layout Outdoor unit PC board (2) Set mode display (LED) H1P H2P H3P H4P H5P H6P H7P (3) Mode setting switch MODE RETURN TEST RESET (1) Microcomputer normal monitor 1 2 3 4 1 2 3 4 (4) Local setting switch Connection terminal for transmission use...
Page 90: Field Setting
SiUS39-602 Field Setting Field Setting Field Setting from Remote Controller Individual function of indoor unit can be changed from the remote controller. At the time of installation or after service inspection / repair, make the local setting in accordance with the following description.
Page 91 Field Setting SiUS39-602 3.1.2 Wireless Remote Controller - Indoor Unit BRC7C812 BRC4C82 BRC7E818 BRC7E83 1. When in the normal mode, push the button for 4 seconds or more, and operation then enters the “field set mode.” 2. Select the desired “mode No.” with the button.
Page 92: Simplified Remote Controller
SiUS39-602 Field Setting 3.1.3 Simplified Remote Controller BRC2A71 Group No. setting by simplified remote controller. 1. Remove the cover of remote controller. 2. While in normal mode, press the [BS6] BUTTON (field set) to enter the FIELD SET MODE. 3. Select the mode No. [00] with [BS2] BUTTON (temperature setting ▲) and [BS3] BUTTON (temperature setting ▼).
Page 93 Field Setting SiUS39-602 3.1.4 Setting Contents and Code No. – VRV Unit Mode Setting Setting Contents Second Code No.(Note 3) Switch system indoor Note 2 unit 10(20) Filter contamination heavy/ Super Light Approx. Heavy Approx. — — settings light (Setting for display long life 10,000 5,000...
Page 94: Detailed Explanation Of Setting Modes
SiUS39-602 Field Setting 3.1.5 Applicable Range of Field Setting Ceiling Slim Ceiling Ceiling Ceiling Ceiling Wall Floor Concealed mounted mounted mounted mounted suspended mounted standing Floor cassette duct type built-in type duct type type type type standing type type Multi flow FXFQ FXDQ FXSQ...
Page 95 Field Setting SiUS39-602 External ON/OFF input This input is used for "ON / OFF operation" and "Protection device input" from the outside. The input is performed from the T1-T1 terminal of the operation terminal block (X1A) in the electric component box. F2 T1 T2 Forced stop Input A...
Page 96 SiUS39-602 Field Setting Air Flow Adjustment - Ceiling height Make the following setting according to the ceiling height. The setting position No. is set to “01” at the factory. In the Case of FXAQ07~24, FXHQ12~36 Setting Switch Setting Position Mode No. Setting Wall-mounted type: Standard 13(23)
Page 97 Field Setting SiUS39-602 3.1.7 Centralized Control Group No. Setting BRC1C Type If carrying out centralized control by central remote controller or unified ON/OFF controller, group No. must be set for each group individually by remote controller. Group No. setting by remote controller for centralized control 1.
Page 98 SiUS39-602 Field Setting BRC7C Type Group No. setting by wireless remote controller for centralized control 1. When in the normal mode, push button for 4 seconds or more, and operation then BRC4C Type enters the “field set mode.” BRC7E Type 2.
Page 99 Field Setting SiUS39-602 Group No. Setting Example Centralized Remote Controller Indoor/Outdoor Outdoor/Outdoor Indoor/Outdoor Outdoor/Outdoor F1 F2 F1 F2 F1 F2 F1 F2 F1 F2 F1 F2 P1 P2 F1 F2 P1 P2 F1 F2 P1 P2 F1 F2 P1 P2 Group Control by Remote Contoller Main 1-00...
Page 100 SiUS39-602 Field Setting 3.1.8 Setting of Operation Control Mode from Remote Controller (Local Setting) The operation control mode is compatible with a variety of controls and operations by limiting the functions of the operation remote controller. Furthermore, operations such as remote controller ON/OFF can be limited in accordance with the combination conditions.
Page 101 Field Setting SiUS39-602 How to Select Whether operation by remote controller will be possible or not for turning on/off, controlling temperature or setting operation mode is selected and decided by the operation mode given on Operation Mode the right edge of the table below. Example ON by remote OFF by remote...
Page 102: Field Setting From Outdoor Unit
SiUS39-602 Field Setting Field Setting from Outdoor Unit 3.2.1 Field Setting from Outdoor Unit Setting by dip switches The following field settings are made by dip switches on PC board. Dipswitch Setting item Description Setting DS1-1 Not used Do not change the factory settings. OFF (Factory set) DS1-2 Not used...
Page 103: Setting By Pushbutton Switches
Field Setting SiUS39-602 Setting by pushbutton switches The following settings are made by pushbutton switches on PC board. MODE RETURN TEST RESET (V2760) There are the following three setting modes. Setting mode 1 (H1P off) Initial status (when normal) : Indicates during “abnormal”, “low noise control” and “demand control”.
Page 104 SiUS39-602 Field Setting a. “Setting mode 1” Normally, “Setting mode 1” is set. In case of other status, push MODE button (BS1) one time and set to “Setting mode 1”. <Selection of setting items> LED display example Push the SET button (BS2) and set Setting (displaying) item LED display to a setting item you want.
Page 105 Field Setting SiUS39-602 b. “Setting mode 2” Setting item Description Operates by Standard compressor only when inverter compressor malfunctions. Temporary operation until the Push and hold the MODE button EMG (Emergency compressor is replaced. Since the comfortableness is (BS1) for 5 seconds and set to operation 1) extremely deteriorated, immediately replace the “Setting mode 2”.
Page 106 SiUS39-602 Field Setting : ON : OFF : Blink Setting item display C/H selection Setting condition display MODE TEST Demand Setting item noise Master Slave ∗ Factory set 8777778 ∗ EMG (emergency Normal operation operation) INV compressor 8777787 Emergency operation operation inhibited.
Page 107 Field Setting SiUS39-602 : ON : OFF : Blink 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)
Page 108 SiUS39-602 Field Setting : ON : OFF : Blink c. Monitor mode LED display Setting item Data display H4P H5P Number of units for sequential To enter the monitor mode, push the 9 7 7 7 7 7 7 See below starting, and others MODE button (BS1) when in “Setting mode 1”.
Page 109 Field Setting SiUS39-602 Push the SET button and match with the LEDs No. 1 - 15, push the RETURN button, and enter the data for each setting. ★ Data such as addresses and number of units is expressed as binary numbers; the two ways of expressing are as follows: The No.
Page 110 SiUS39-602 Field Setting 3.2.2 Cool / Heat Mode Switching Set Cool/Heat Separately for Each BS Unit by Cool/Heat Selector. Set remote controller change over switch (SS1, SS2) as following: • When using COOL/HEAT selector, turn this switch to the BS side. NOTE: This setting must be completed before turning power supply ON.
Page 111 Field Setting SiUS39-602 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 external control adapter for outdoor unit (optional), you can lower operating noise by 2-3 dB. A.
Page 112 SiUS39-602 Field Setting Image of operation in the case of A Image of operation in the case of B Image of operation in the case of A and B Test Operation...
Page 113 Field Setting SiUS39-602 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. A. When the demand operation is carried out by external instructions (with the use of the external control adapter for outdoor unit).
Page 114: Image Of Operation In The Case Of A
SiUS39-602 Field Setting Image of operation in the case of A Power consumption The power Rated power consumption consumption during 80 % of rated power consumption the demand level 1 Demand level 1 instructing Demand level 2 instructing Demand level 3 instructing 70 % of rated power consumption instructing can be 60 % of rated power consumption...
Page 115 Field Setting SiUS39-602 Detailed Setting Procedure of Low Noise Operation and Demand Control 1. Setting mode 1 (H1P off) In setting mode 2, push the BS1 (MODE button) one time. → Setting mode 2 is entered and H1P lights. During the setting mode 1 is displayed, “In low noise operation” and “In demand control” are displayed.
Page 116 SiUS39-602 Field Setting Setting Setting Setting No. indication Setting No. indication Setting Setting contents indication (Initial setting) contents contents H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P External low noise / (Factory...
Page 117 Field Setting SiUS39-602 3.2.4 Setting of Refrigerant Additional Charging Operation When additional refrigerant is not charged all with outdoor unit in stop mode, operate the outdoor unit and charge the liquid refrigerant from the service port of liquid stop value. The additional charging operation is activated by pushbutton switch on the outdoor unit PC board.
Page 118 SiUS39-602 Field Setting [Operation procedure detail] After turning the respective power supply switch of indoor and outdoor units off and charging the refrigerant, turn on the power of indoor and outdoor units. Do not fail to turn the power off and charge the refrigerant with outdoor unit in stop mode before adding the refrigerant following this procedure, otherwise resulting in trouble.
Page 119 Field Setting SiUS39-602 3.2.6 Setting of Vacuuming Mode In order to perform vacuuming operation at site, fully open the expansion valves of indoor and outdoor units and turn on some solenoid valves. [Operating procedure] With Setting Mode 2 while the unit stops, set (B) Refrigerant recovery / Vacuuming mode to ON.
Page 120 SiUS39-602 Field Setting 3.2.8 Power Transistor Check Operation When the inverter system malfunctions (malfunction of inverter, INV compressor), to locate where the malfunction occurs, switching to the power transistor check mode of inverter in the service mode setting enables not to judge the position detection signal malfunction but to output waveform only during inverter operation.
Page 121 Field Setting SiUS39-602 Test Operation...
Page 122: Part 6 Troubleshooting
SiUS39-602 Part 6 Troubleshooting 1. Troubleshooting by Remote Controller ..........114 1.1 The INSPECTION / TEST Button ............114 1.2 Self-diagnosis by Wired Remote Controller ......... 115 1.3 Self-diagnosis by Wireless Remote Controller........116 1.4 Operation of the Remote Controller’s Inspection / Test Operation Button ................
Page 123 SiUS39-602 2.27 “J5” Outdoor Unit: Malfunction of Thermistor (R2T) for Suction Pipe ..................158 2.28 “J6” Outdoor Unit: Malfunction of Thermistor (R4T) for Outdoor Unit Heat Exchanger .............. 159 2.29 “J7” Malfunction of Receiver Outlet Liquid Pipe Thermistor (R6T) ..160 2.30 “J8”...
Page 124 SiUS39-602 3.4 “MC” Address Duplication, Improper Setting.......... 198 4. Troubleshooting (OP: Schedule Timer) ..........199 4.1 “UE” Malfunction of Transmission Between Centralized Controller and Indoor Unit ................... 199 4.2 “M1” PC Board Defect ................201 4.3 “M8” Malfunction of Transmission Between Optional Controllers for Centralized Control ................
Page 125: Troubleshooting By Remote Controller
Troubleshooting by Remote Controller SiUS39-602 1. Troubleshooting by Remote Controller The INSPECTION / TEST Button The following modes can be selected by using the [Inspection/Test Operation] button on the remote control. Depress Inspection/Test Operation button for more than 4 seconds. Indoor unit settings can be made Service data can be obtained.
Page 126: Self-Diagnosis By Wired Remote Controller
SiUS39-602 Troubleshooting by Remote Controller Self-diagnosis by Wired Remote Controller Explanation If operation stops due to malfunction, the remote controller’s operation LED blinks, and malfunction code is displayed. (Even if stop operation is carried out, malfunction contents are displayed when the inspection mode is entered.) The malfunction code enables you to tell what kind of malfunction caused operation to stop.
Page 127: Self-Diagnosis By Wireless Remote Controller
Troubleshooting by Remote Controller SiUS39-602 Self-diagnosis by Wireless Remote Controller In the Case of If equipment stops due to a malfunction, the operation indicating LED on the light reception section flashes. BRC7C Type The malfunction code can be determined by following the procedure described below. (The BRC7E Type malfunction code is displayed when an operation error has occurred.
Page 128 SiUS39-602 Troubleshooting by Remote Controller The lower digit of the code changes as shown below when the UP and DOWN buttons are pressed. Troubleshooting...
Page 129 Troubleshooting by Remote Controller SiUS39-602 Troubleshooting...
Page 130: Operation Of The Remote Controller's Inspection / Test Operation Button
SiUS39-602 Troubleshooting by Remote Controller Operation of the Remote Controller’s Inspection / Test Operation Button Unit Malfunction code Inspection Normal display (No display) Malfunction code blinks when a malfunction occurs. Inspection/test Push the button. operation Unit Example of capacity code display 0 7 1...
Page 131: Remote Controller Service Mode
Troubleshooting by Remote Controller SiUS39-602 Remote Controller Service Mode How to Enter the Service Mode Service Mode 1. Select the mode No. Set the desired mode No. with the button. Operation (For wireless remote controller, Mode 43 only can be set.) Method 2.
Page 132 SiUS39-602 Troubleshooting by Remote Controller Mode Function Contents and operation method Remote controller display example Malfunction Display malfunction hysteresis. hysteresis display The history No. can be changed with the Unit 1 button. Malfunction code 2-U4 Malfunction code Hystory No: 1 - 9 1: Latest (VE007) Display of sensor...
Page 133: Remote Controller Self-Diagnosis Function
Troubleshooting by Remote Controller SiUS39-602 Remote Controller Self-Diagnosis Function The remote controller switches are equipped with a self diagnosis function so that more appropriate maintenance can be carried out. If a malfunction occurs during operation, the operation lamp, malfunction code and display of malfunctioning unit No. let you know the contents and location of the malfunction.
Page 134 SiUS39-602 Troubleshooting by Remote Controller : ON : OFF : Blink Malfunction Operation Inspection Unit No. Malfunction contents Page code lamp display Referred Indoor Error of external protection device Unit PC board defect, E PROM defect Malfunction of drain level control system (S1L) Fan motor (MIF) lock, overload Malfunction of swing flap motor (MA) Malfunction of moving part of electronic expansion valve (20E)
Page 135 Troubleshooting by Remote Controller SiUS39-602 Malfunction Operation Inspection Unit No. Malfunction contents Page code lamp display Referred Outdoor Malfunction of power unit — Unit Malfunction of transmission between inverter and control PC board Inverter over-ripple protection Malfunction of inverter radiating fin temperature rise sensor Faulty field setting after replacing main PC board or faulty combination of PC board System...
Page 136: Malfunction Code Indication By Outdoor Unit Pcb
SiUS39-602 Troubleshooting by Remote Controller Malfunction code indication by outdoor unit PCB Contents of malfunction Malfunction To enter the monitor mode, push the code MODE button (BS1) when in “Setting mode 1”. Abnormal discharge pressure HPS activated Abnormal suction pressure Abnormal Pe Compressor lock Detection of INV compressor lock...
Page 137 Troubleshooting by Remote Controller SiUS39-602 Malfunction Confirmation of malfunction 1 Confirmation of malfunction 2 Confirmation of malfunction 3 code Malfunction code 1st Malfunction code 2nd Malfunction Master digit display section digit display section location Slave 1 Slave 2 Troubleshooting...
Page 138: Troubleshooting By Indication On The Remote Controller
SiUS39-602 Troubleshooting by Indication on the Remote Controller 2. Troubleshooting by Indication on the Remote Controller “ A0 ” Indoor Unit: Error of External Protection Device Remote Controller Display Applicable All indoor unit models Models Method of Detect open or short circuit between external input terminals in indoor unit. Malfunction Detection Malfunction...
Page 139: A1" Indoor Unit: Pc Board Defect
Troubleshooting by Indication on the Remote Controller SiUS39-602 “ A1 ” Indoor Unit: PC Board Defect Remote Controller Display Applicable All indoor unit models Models Method of Check data from E²PROM. Malfunction Detection Malfunction When data could not be correctly received from the E²PROM E²PROM : Type of nonvolatile memory.
Page 140: A3" Indoor Unit: Malfunction Of Drain Level Control System (S1L)
SiUS39-602 Troubleshooting by Indication on the Remote Controller “ A3 ” Indoor Unit: Malfunction of Drain Level Control System (S1L) Remote Controller Display Applicable FXFQ, FXDQ, FXSQ, FXMQ, FXHQ, FXAQ Models Method of By float switch OFF detection Malfunction Detection Malfunction When rise of water level is not a condition and the float switch goes OFF.
Page 141 Troubleshooting by Indication on the Remote Controller SiUS39-602 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Is power supply Provide 208~230V power 208~230V provided? supply. The float A short switch is connected to circuit connector is Connect either a short circuit...
Page 142: A6" Indoor Unit: Fan Motor (M1F) Lock, Overload
SiUS39-602 Troubleshooting by Indication on the Remote Controller “ A6 ” Indoor Unit: Fan Motor (M1F) Lock, Overload Remote Controller 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 143: A7" Indoor Unit: Malfunction Of Swing Flap Motor (Ma)
Troubleshooting by Indication on the Remote Controller SiUS39-602 “ A7 ” Indoor Unit: Malfunction of Swing Flap Motor (MA) Remote Controller Display Applicable FXHQ only Models Method of Utilizes ON/OFF of the limit switch when the motor turns. Malfunction Detection Malfunction When ON/OFF of the micro-switch for positioning cannot be reversed even though the swing flap motor is energized for a specified amount of time (about 30 seconds).
Page 144 SiUS39-602 Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Is power supply Provide 208~230V power 208~230V provided? supply. Indoor unit is a model equipped Replace indoor unit PC board.
Page 145: A9" Indoor Unit: Malfunction Of Moving Part Of
Troubleshooting by Indication on the Remote Controller SiUS39-602 “ A9 ” Indoor Unit: Malfunction of Moving Part of Electronic Expansion Valve (20E) Remote Controller Display Applicable All indoor unit models Models Method of Use a microcomputer to check the electronic expansion valve for coil conditions. Malfunction Detection Malfunction...
Page 146 SiUS39-602 Troubleshooting by Indication on the Remote Controller ∗ 1 Coil check method for the moving part of the electronic expansion valve Disconnect the electronic expansion valve from the PC board and check the continuity between the connector pins. (Normal) Pin No.
Page 147: Af" Indoor Unit: Drain Level Above Limit
Troubleshooting by Indication on the Remote Controller SiUS39-602 “ AF ” Indoor Unit: Drain Level above Limit Remote Controller Display Applicable FXFQ, FXDQ, FXSQ, FXMQ, FXHQ Models Method of Water leakage is detected based on float switch ON/OFF operation while the compressor is in Malfunction non-operation.
Page 148: Aj" Indoor Unit
SiUS39-602 Troubleshooting by Indication on the Remote Controller “ AJ ” Indoor Unit: Malfunction of Capacity Determination Device Remote controller display Applicable All indoor unit models Models Method of Capacity is determined according to resistance of the capacity setting adaptor and the memory inside the IC memory on the indoor unit PC board, and whether the value is normal or abnormal Malfunction is determined.
Page 149: C4" Indoor Unit: Malfunction Of Thermistor (R2T)
Troubleshooting by Indication on the Remote Controller SiUS39-602 “ C4 ” Indoor Unit: Malfunction of Thermistor (R2T) for Heat Exchanger Remote Controller Display Applicable All indoor unit models Models Method of Malfunction detection is carried out by temperature detected by heat exchanger thermistor. Malfunction Detection Malfunction...
Page 150: For Gas Pipes
SiUS39-602 Troubleshooting by Indication on the Remote Controller 2.10 “ C5 ” Indoor Unit: Malfunction of Thermistor (R31T, R32T) for Gas Pipes Remote Controller Display Applicable All indoor unit models Models Method of Malfunction detection is carried out by temperature detected by gas pipe thermistor. Malfunction Detection Malfunction...
Page 151: C9" Indoor Unit: Malfunction Of Thermistor (R1T) For Suction Air
Troubleshooting by Indication on the Remote Controller SiUS39-602 2.11 “ C9 ” Indoor Unit: Malfunction of Thermistor (R1T) for Suction Air Remote Controller Display Applicable AII indoor unit models Models Method of Malfunction detection is carried out by temperature detected by suction air temperature thermistor.
Page 152: Cj" Indoor Unit: Malfunction Of Thermostat Sensor In
SiUS39-602 Troubleshooting by Indication on the Remote Controller 2.12 “ CJ ” Indoor Unit: Malfunction of Thermostat Sensor in Remote Controller Remote Controller Display Applicable AII indoor unit models Models Method of Malfunction detection is carried out by temperature detected by remote controller air temperature thermistor.
Page 153: E1" Outdoor Unit: Pc Board Defect
Troubleshooting by Indication on the Remote Controller SiUS39-602 2.13 “ E1 ” Outdoor Unit: PC Board Defect Remote Controller Display Applicable REYQ72M, 96M Models Method of Check data from E²PROM Malfunction Detection Malfunction When data could not be correctly received from the E²PROM E²PROM : Type of nonvolatile memory.
Page 154: E3" Outdoor Unit: Actuation Of High Pressure Switch
SiUS39-602 Troubleshooting by Indication on the Remote Controller 2.14 “ E3 ” Outdoor Unit: Actuation of High Pressure Switch Remote Controller Display Applicable REYQ72M, 96M Models Method of Abnormality is detected when the contact of the high pressure protection switch opens. Malfunction Detection Malfunction...
Page 155: E4" Outdoor Unit: Actuation Of Low Pressure Sensor
Troubleshooting by Indication on the Remote Controller SiUS39-602 2.15 “ E4 ” Outdoor Unit: Actuation of Low Pressure Sensor Remote Controller Display Applicable Models REYQ72M, 96M Method of Abnormality is detected by the pressure value with the low pressure sensor. Malfunction Detection Malfunction...
Page 156: Compressor Motor Lock (Inv Compressor)
SiUS39-602 Troubleshooting by Indication on the Remote Controller 2.16 “ E5 ” Compressor Motor Lock (INV Compressor) Remote Controller Display Applicable Models REYQ72M, 96M Method of Inverter PC board takes the position signal from UVWN line connected between the inverter and compressor, and detects the position signal pattern.
Page 157: E6" Compressor Motor Overcurrent/Lock (Std Compressor)
Troubleshooting by Indication on the Remote Controller SiUS39-602 2.17 “ E6 ” Compressor Motor Overcurrent/Lock (STD Compressor) Remote Controller Display Applicable REYQ72M, 96M Models Method of Detects the overcurrent with current sensor (CT). Malfunction Detection Malfunction Malfunction is decided when the detected current value exceeds the below mentioned value for Decision 2 seconds.
Page 158: Malfunction Of Outdoor Unit Fan Motor
SiUS39-602 Troubleshooting by Indication on the Remote Controller “ E7 ” 2.18 Malfunction of Outdoor Unit Fan Motor Remote Controller Display Applicable REYQ72M, 96M Models Method of Malfunction of fan motor system is detected according to the fan speed detected by hall IC Malfunction when the fan motor runs.
Page 159 Troubleshooting by Indication on the Remote Controller SiUS39-602 Troubleshooting Check No. 12 Check on pulse input of position signal of fan inverter Is the LED (HAP) on fan inverter Replace the fan inverter PCB blinking? PCB. Check No. 8 Check on connector of fan motor (Power supply cable) Are the resistance values...
Page 160: E9" Outdoor Unit: Malfunction Of Moving Part Of
SiUS39-602 Troubleshooting by Indication on the Remote Controller 2.19 “ E9 ” Outdoor Unit: Malfunction of Moving Part of Electronic Expansion Valve (Y1E, Y2E, Y3E) Remote Controller Display Applicable REYQ72M, 96M Models Method of Check disconnection of connector Check continuity of expansion valve coil Malfunction Detection Malfunction...
Page 161 Troubleshooting by Indication on the Remote Controller SiUS39-602 ∗ 1 Coil check method for the moving part of the electronic expansion valve Disconnect the electronic expansion valve from the PC board and check the continuity between the connector pins. (Normal) Pin No.
Page 162: 2.20 " F3 " Outdoor Unit
SiUS39-602 Troubleshooting by Indication on the Remote Controller 2.20 “ F3 ” Outdoor Unit: Abnormal Discharge Pipe Temperature Remote Controller Display Applicable REYQ72M, 96M Models Method of Abnormality is detected according to the temperature detected by the discharge pipe temperature sensor. Malfunction Detection Malfunction...
Page 163: Refrigerant Overcharged
Troubleshooting by Indication on the Remote Controller SiUS39-602 2.21 “ F6 ” Refrigerant Overcharged Remote Controller Display Applicable REYQ72M, 96M Models Method of Refrigerant overcharge is detected from the receiver gas pipe temperature during test Malfunction operation. Detection Malfunction When the receiver gas pipe temperature is lower than evaporating temperature during test operation.
Page 164: Abnormal Outdoor Fan Motor Signal
SiUS39-602 Troubleshooting by Indication on the Remote Controller 2.22 “ H7 ” Abnormal Outdoor Fan Motor Signal Remote Controller Display Applicable Models REYQ72M, 96M Method of Detection of abnormal signal from fan motor. Malfunction Detection Malfunction In case of detection of abnormal signal at starting fan motor. Decision Conditions Supposed...
Page 165: 2.23 " H9 " Outdoor Unit
Troubleshooting by Indication on the Remote Controller SiUS39-602 2.23 “ H9 ” Outdoor Unit: Malfunction of Thermistor for Outdoor Air (R1T) Remote Controller Display Applicable REYQ72M, 96M Models Method of The abnormal detection is based on current detected by current sensor. Malfunction Detection Malfunction...
Page 166: Current Sensor Malfunction
SiUS39-602 Troubleshooting by Indication on the Remote Controller “ J2 ” 2.24 Current Sensor Malfunction Remote Controller Display Applicable REYQ72M, 96M Models Method of Malfunction is detected according to the current value detected by current sensor. Malfunction Detection Malfunction When the current value detected by current sensor becomes 5A or lower, or 40A or more during standard compressor operation.
Page 167: J3" Outdoor Unit: Malfunction Of Discharge Pipe Thermistor (R31~32T)
Troubleshooting by Indication on the Remote Controller SiUS39-602 2.25 “ J3 ” Outdoor Unit: Malfunction of Discharge Pipe Thermistor (R31~32T) Remote Controller Display Applicable REYQ72M, 96M Models Method of Malfunction is detected from the temperature detected by discharge pipe temperature thermistor.
Page 168: J4" Malfunction Of Heat Exchanger Gas Pipe Thermistor (R81, 82T)
SiUS39-602 Troubleshooting by Indication on the Remote Controller 2.26 “J4” Malfunction of Heat Exchanger Gas Pipe Thermistor (R81, 82T) Remote Controller Display Applicable REYQ72M, 96M Models Method of Malfunction is detected according to the temperature detected by heat exchanger gas pipe thermistor.
Page 169: J5" Outdoor Unit: Malfunction Of Thermistor (R2T) For Suction Pipe
Troubleshooting by Indication on the Remote Controller SiUS39-602 2.27 “ J5 ” Outdoor Unit: Malfunction of Thermistor (R2T) for Suction Pipe Remote Controller Display Applicable REYQ72M, 96M Models Method of Malfunction is detected from the temperature detected by the suction pipe temperature thermistor.
Page 170: J6" Outdoor Unit: Malfunction Of Thermistor (R4T) For Outdoor Unit Heat Exchanger
SiUS39-602 Troubleshooting by Indication on the Remote Controller 2.28 “ J6 ” Outdoor Unit: Malfunction of Thermistor (R4T) for Outdoor Unit Heat Exchanger Remote Controller Display Applicable REYQ72M, 96M Models Method of Malfunction is detected from the temperature detected by the heat exchanger thermistor. Malfunction Detection Malfunction...
Page 171: Malfunction Of Receiver Outlet Liquid Pipe Thermistor (R6T)
Troubleshooting by Indication on the Remote Controller SiUS39-602 2.29 “ J7 ” Malfunction of Receiver Outlet Liquid Pipe Thermistor (R6T) Remote Controller Display Applicable REYQ96M Models Method of Malfunction is detected according to the temperature detected by receiver outlet liquid pipe thermistor.
Page 172: Malfunction Of Oil Equalizing Pipe Thermistor (R7T)
SiUS39-602 Troubleshooting by Indication on the Remote Controller 2.30 “ J8 ” Malfunction of Oil Equalizing Pipe Thermistor (R7T) Remote Controller Display Applicable REYQ72M, 96M Models Method of Malfunction is detected according to the temperature detected by oil equalizing pipe thermistor. Malfunction Detection Malfunction...
Page 173: Malfunction Of Sub-Cooling Heat Exchanger Gas Pipe Thermistor (R5T)
Troubleshooting by Indication on the Remote Controller SiUS39-602 2.31 “ J9 ” Malfunction of Sub-cooling Heat Exchanger Gas Pipe Thermistor (R5T) Remote Controller Display Applicable REYQ72M, 96M Models Method of Malfunction is detected according to the temperature detected by sub-cooling heat exchanger gas pipe thermistor.
Page 174: 2.32 " Ja " Outdoor Unit
SiUS39-602 Troubleshooting by Indication on the Remote Controller 2.32 “ JA ” Outdoor Unit: Malfunction of Discharge Pipe Pressure Sensor Remote Controller Display Applicable Models REYQ72M, 96M Method of Malfunction is detected from the pressure detected by the high pressure sensor. Malfunction Detection Malfunction...
Page 175: 2.33 " Jc " Outdoor Unit
Troubleshooting by Indication on the Remote Controller SiUS39-602 2.33 “ JC ” Outdoor Unit: Malfunction of Suction Pipe Pressure Sensor Remote Controller Display Applicable Models REYQ72M, 96M Method of Malfunction is detected from pressure detected by low pressure sensor. Malfunction Detection Malfunction When the suction pipe pressure sensor is short circuit or open circuit.
Page 176: L4" Outdoor Unit: Malfunction Of Inverter Radiating Fin
SiUS39-602 Troubleshooting by Indication on the Remote Controller 2.34 “ L4 ” Outdoor Unit: Malfunction of Inverter Radiating Fin Temperature Rise Remote Controller Display Applicable REYQ72M, 96M Models Method of Fin temperature is detected by the thermistor of the radiation fin. Malfunction Detection Malfunction...
Page 177: L5" Outdoor Unit: Inverter Compressor Abnormal
Troubleshooting by Indication on the Remote Controller SiUS39-602 2.35 “ L5 ” Outdoor Unit: Inverter Compressor Abnormal Remote Controller Display Applicable Models REYQ72M, 96M Method of Malfunction is detected from current flowing in the power transistor. Malfunction Detection Malfunction When an excessive current flows in the power transistor. (Instantaneous overcurrent also causes activation.) Decision Conditions...
Page 178: L8" Outdoor Unit: Inverter Current Abnormal
SiUS39-602 Troubleshooting by Indication on the Remote Controller 2.36 “ L8 ” Outdoor Unit: Inverter Current Abnormal Remote Controller Display Applicable Models REYQ72M, 96M 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 179: L9" Outdoor Unit: Inverter Start Up Error
Troubleshooting by Indication on the Remote Controller SiUS39-602 2.37 “ L9 ” Outdoor Unit: Inverter Start up Error Remote Controller Display Applicable REYQ72M, 96M 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...
Page 180: Inverter And Control Pc Board
SiUS39-602 Troubleshooting by Indication on the Remote Controller 2.38 “ LC ” Outdoor Unit: Malfunction of Transmission between Inverter and Control PC Board Remote Controller Display Applicable REYQ72M, 96M Models Method of Check the communication state between inverter PC board and control PC board by micro- computer.
Page 181 Troubleshooting by Indication on the Remote Controller SiUS39-602 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Are the connectors between the main PC board (A1P), Connect transmission wiring and fan drive PC board (A3P) turn on again.
Page 182: P1" Outdoor Unit: Inverter Over-Ripple Protection
Be sure to explain to the user that Give the user a copy of "notification of inspection results"and leave there is a "power supply imbalance" it up to him to improve the imbalance. for which DAIKIN is not responsible. (V2816) Troubleshooting...
Page 183: 2.40 " P4 " Outdoor Unit
Troubleshooting by Indication on the Remote Controller SiUS39-602 2.40 “ P4 ” Outdoor Unit: Malfunction of Inverter Radiating Fin Temperature Rise Sensor Remote Controller Display Applicable REYQ72M, 96M Models Method of Resistance of radiation fin thermistor is detected when the compressor is not operating. Malfunction Detection Malfunction...
Page 184: Pc Board Or Faulty Combination Of Pc Board
SiUS39-602 Troubleshooting by Indication on the Remote Controller 2.41 “ PJ ” Outdoor Unit: Faulty Field Setting after Replacing Main PC Board or Faulty Combination of PC Board Remote Controller Display Applicable REYQ72M, 96M Models Method of The faulty (or no) field setting after replacing main PC board or faulty PC board combination is detected through communications with the inverter.
Page 185: Uo" Outdoor Unit: Low Pressure Drop Due To Refrigerant
Troubleshooting by Indication on the Remote Controller SiUS39-602 2.42 “ UO ” Outdoor Unit: Low Pressure Drop due to Refrigerant Shortage or Electronic Expansion Valve Failure Remote Controller Display Applicable Models REYQ72M, 96M Method of Short of gas malfunction is detected by discharge pipe temperature thermistor. Malfunction Detection Malfunction...
Page 186: Outdoor Unit: Reverse Phase, Open Phase
SiUS39-602 Troubleshooting by Indication on the Remote Controller 2.43 “ U1 ” Outdoor Unit: Reverse Phase, Open Phase Remote Controller Display Applicable REYQ72M, 96M Models Method of Detection is based on the voltage in main circuit capacitor for inverter and supply voltage. Malfunction The phase of each phase are detected by reverse phase detection circuit and right phase or reverse phase are judged.
Page 187: Outdoor Unit: Power Supply Insufficient Or Instantaneous Failure
Troubleshooting by Indication on the Remote Controller SiUS39-602 2.44 “ U2 ” Outdoor Unit: Power Supply Insufficient or Instantaneous Failure Remote Controller Display Applicable REYQ72M, 96M Models Method of Detection of voltage of main circuit capacitor built in the inverter and power supply voltage. Malfunction Detection Malfunction...
Page 188 SiUS39-602 Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. connection wire connected Repair wiring. between the connector X21A and X6A? Turn on again. 208 ~ 230 V of Turn K1M ON.
Page 189: U3" Outdoor Unit: Check Operation Not Executed
Troubleshooting by Indication on the Remote Controller SiUS39-602 “ U3 ” Outdoor Unit: 2.45 Check Operation not Executed Remote Controller Display Applicable REYQ72M, 96M 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 190: Malfunction Of Transmission Between Indoor Units
SiUS39-602 Troubleshooting by Indication on the Remote Controller 2.46 “ U4 ” Malfunction of Transmission between Indoor Units Remote Controller Display Applicable All model of indoor unit REYQ72M, 96M Models Method of Microcomputer checks if transmission between indoor and outdoor units is normal. Malfunction Detection Malfunction...
Page 191 Troubleshooting by Indication on the Remote Controller SiUS39-602 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. the indoor or outdoor unit PC board been replaced, or has the indoor - outdoor Push and hold the RESET or outdoor - outdoor unit button on the master outdoor...
Page 192: Remote Controller And Indoor Unit
SiUS39-602 Troubleshooting by Indication on the Remote Controller 2.47 “ U5 ” Indoor Unit: Malfunction of Transmission between Remote Controller and Indoor Unit Remote Controller Display Applicable All models of indoor units Models Method of In case of controlling with 2-remote controller, check the system using microcomputer is signal transmission between indoor unit and remote controller (main and sub) is normal.
Page 193: U7" Indoor Unit: Malfunction Of Transmission Between
Troubleshooting by Indication on the Remote Controller SiUS39-602 2.48 “ U7 ” Indoor Unit: Malfunction of Transmission between Outdoor Units Remote Controller Display Applicable All models of indoor units Models Method of Microcomputer checks if transmission between outdoor units. Malfunction Detection Malfunction When transmission is not carried out normally for a certain amount of time...
Page 194 SiUS39-602 Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Is the outdoor units multi Fix the outdoor units multi connection transmission connection transmission wiring normal? wiring and reset power.
Page 195: Main And Sub Remote Controllers
Troubleshooting by Indication on the Remote Controller SiUS39-602 2.49 “ U8 ” Indoor Unit: Malfunction of Transmission between MAIN and SUB Remote Controllers Remote Controller Display Applicable All models of indoor units Models Method of In case of controlling with 2-remote controller, check the system using microcomputer if signal transmission between indoor unit and remote controller (main and sub) is normal.
Page 196: 2.50 " U9 " Indoor Units
SiUS39-602 Troubleshooting by Indication on the Remote Controller 2.50 “ U9 ” Indoor Units: Malfunction of Transmission between Indoor Units and Outdoor Units in the Same System Remote Controller Display Applicable All models of indoor units Models Method of Detect the malfunction signal of any other indoor unit within the system concerned. Malfunction Detection Malfunction...
Page 197 Troubleshooting by Indication on the Remote Controller SiUS39-602 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 198: Ua" Improper Combination Of Indoor Units And
SiUS39-602 Troubleshooting by Indication on the Remote Controller 2.51 “ UA ” Improper Combination of Indoor Units and Outdoor Units/Indoor Units and Remote Controller Remote Controller Display Applicable All indoor unit models REYQ72M, 96M Models Remote controller Method of A difference occurs in data by the type of refrigerant between indoor and outdoor units. The number of indoor units is outside of the allowable range.
Page 199: Address Duplication Of Centralized Remote Controller
Troubleshooting by Indication on the Remote Controller SiUS39-602 2.52 “ UC ” Address Duplication of Centralized Remote Controller Remote Controller Display Applicable All models of indoor unit Centralized controller Models Method of The principal indoor unit detects the same address as that of its own on any other indoor unit. Malfunction Detection Malfunction...
Page 200: Malfunction Of Transmission Between Centralized Controller And Indoor Unit
SiUS39-602 Troubleshooting by Indication on the Remote Controller 2.53 “ UE ” Malfunction of Transmission between Centralized Controller and Indoor Unit Remote Controller Display Applicable All models of indoor units Centralized controller Models Method of Microcomputer checks if transmission between indoor unit and centralized controller is normal. Malfunction Detection Malfunction...
Page 201 Troubleshooting by Indication on the Remote Controller SiUS39-602 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. an indoor unit once connected been remove Reset power supply or its address simultaneously for all optional changed? controllers for centralized...
Page 202: System Is Not Set Yet
SiUS39-602 Troubleshooting by Indication on the Remote Controller 2.54 “ UF ” System is not Set yet Remote Controller Display Applicable All indoor units models REYQ72M, 96M Models Method of The number of indoor units in terms of data transmission becomes mismatched to that of indoor Malfunction units with changes in temperature on operation for checks.
Page 203: Malfunction Of System, Refrigerant System Address Undefined
Troubleshooting by Indication on the Remote Controller SiUS39-602 2.55 “ UH ” Malfunction of System, Refrigerant System Address Undefined Remote Controller Display Applicable All models of indoor units REYQ72M, 96M Models Method of Malfunction Detection Malfunction Decision Conditions Supposed Improper connection of transmission wiring between indoor-outdoor unit and outdoor- outdoor unit Causes Defect of indoor unit PC board...
Page 204 SiUS39-602 Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Does electricity a malfunction being introduce for occur even after 12 the first time after minutes elapses from the Normal installation or after an indoor...
Page 205: Troubleshooting (Op: Central Remote Controller)
Troubleshooting (OP: Central Remote Controller) SiUS39-602 3. Troubleshooting (OP: Central Remote Controller) “ M1 ” PC Board Defect Remote Controller Display Applicable Central remote controller Models Method of Detect an abnormality in the DIII-NET polarity circuit. Malfunction Detection Malfunction When + polarity and - polarity are detected at the same time. Decision Conditions Supposed...
Page 206: Malfunction Of Transmission Between Optional Controllers For Centralized Control
SiUS39-602 Troubleshooting (OP: Central Remote Controller) “ M8 ” Malfunction of Transmission Between Optional Controllers for Centralized Control Remote Controller Display Applicable Central remote controller Models Method of Detect the malfunction according to DIII-NET transmission data. (The system will be automatically reset.) Malfunction Detection...
Page 207: Improper Combination Of Optional Controllers For Centralized Control
Troubleshooting (OP: Central Remote Controller) SiUS39-602 “ MA ” Improper Combination of Optional Controllers for Centralized Control Remote Controller Display Applicable Central remote controller Models Method of Detect the malfunction according to DIII-NET transmission data. Malfunction Detection Malfunction When the schedule timer is set to individual use mode, other central component is present. When multiple master controller are present.
Page 208 SiUS39-602 Troubleshooting (OP: Central Remote Controller) Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Cannot be used in combination with a wiring the wiring adaptor for adaptor for electrical electrical appendices appendices.
Page 209: Address Duplication, Improper Setting
Troubleshooting (OP: Central Remote Controller) SiUS39-602 “ MC ” Address Duplication, Improper Setting Remote Controller Display Applicable Central remote controller Models Method of Detect the malfunction according to DIII-NET transmission data. Malfunction Detection Malfunction Two units are both set to master controller mode or slave controller mode. Decision Conditions Supposed...
Page 210: Troubleshooting (Op: Schedule Timer)
SiUS39-602 Troubleshooting (OP: Schedule Timer) Troubleshooting (OP: Schedule Timer) “ UE ” Malfunction of Transmission Between Centralized Controller and Indoor Unit Remote Controller Display Applicable Schedule timer Indoor units Models Method of Microcomputer checks if transmission between indoor unit and centralized controller is normal. Malfunction Detection Malfunction...
Page 211 Troubleshooting (OP: Schedule Timer) SiUS39-602 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. an indoor unit once connected been Reset power supply removed or its address simultaneously for all optional changed? controllers for centralized control.
Page 212: Pc Board Defect
SiUS39-602 Troubleshooting (OP: Schedule Timer) “ M1 ” PC Board Defect Remote Controller Display Applicable Schedule timer Models Method of Detect an abnormality in the DIII-NET polarity circuit. Malfunction Detection Malfunction When + polarity and - polarity are detected at the same time. Decision Conditions Supposed...
Page 213: Malfunction Of Transmission Between Optional Controllers For Centralized Control
Troubleshooting (OP: Schedule Timer) SiUS39-602 “ M8 ” Malfunction of Transmission Between Optional Controllers for Centralized Control Remote Controller Display Applicable Schedule timer Models Method of Detect the malfunction according to DIII-NET transmission data. (The system will be automatically reset.) Malfunction Detection Malfunction...
Page 214: Improper Combination Of Optional Controllerslers For Centralized Controllers
SiUS39-602 Troubleshooting (OP: Schedule Timer) “ MA ” Improper Combination of Optional Controllers for Centralized Control Remote Controller Display Applicable Schedule timer Models Method of Detect the malfunction according to DIII-NET transmission data. Malfunction Detection Malfunction When the schedule timer is set to individual use mode, other central component is present. When multiple master controller are present.
Page 215 Troubleshooting (OP: Schedule Timer) SiUS39-602 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Cannot be used in combination with a wiring Is the wiring adaptor for electrical adaptor for electrical appendices.
Page 216: Address Duplication, Improper Setting
SiUS39-602 Troubleshooting (OP: Schedule Timer) “ MC ” Address Duplication, Improper Setting Remote Controller Display Applicable Schedule timer Models Method of Detect the malfunction according to DIII-NET transmission data. Malfunction Detection Malfunction When two or more schedule timers are connected. Decision Conditions Supposed...
Page 217: Troubleshooting (Op: Unified On/Off Controller)
Troubleshooting (OP: Unified ON/OFF Controller) SiUS39-602 Troubleshooting (OP: Unified ON/OFF Controller) Operation Lamp Blinks Remote Operation lamp blinks Controller Display Applicable All models of indoor units Unified ON/OFF controller Models Method of Detect the malfunction according to DIII-NET transmission data. Malfunction Detection Malfunction...
Page 218 SiUS39-602 Troubleshooting (OP: Unified ON/OFF Controller) Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Is a malfunction code displayed on the Diagnose the cause with the remote controller? air conditioner's failure diagnosis manual.
Page 219: Display "Under Centralized Control" Blinks (Repeats Single Blink)
Troubleshooting (OP: Unified ON/OFF Controller) SiUS39-602 Display “Under Centralized Control” Blinks (Repeats Single Blink) Remote “under centralized control” (Repeats double blink) Controller Display Applicable Unified ON/OFF controller Central remote controller Models Schedule timer Method of Detect the malfunction according to DIII-NET transmission data. Malfunction Detection Malfunction...
Page 220 SiUS39-602 Troubleshooting (OP: Unified ON/OFF Controller) Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Has a once connected optional controller for centralized Reset power supply control been disconnected simultaneously for all optional or its address controllers for centralized...
Page 221 Troubleshooting (OP: Unified ON/OFF Controller) SiUS39-602 Is the wiring adaptor for Cannot be used in electrical appendices combination with a wiring connected? adaptor for electrical appendices. Remove the wiring adaptor for electrical appendices and reset the power supply for all optional controllers for centralized control simultaneously.
Page 222: Display "Under Centralized Control" Blinks (Repeats Double Blink)
SiUS39-602 Troubleshooting (OP: Unified ON/OFF Controller) Display “Under Centralized Control” Blinks (Repeats Double Blink) Remote “under centralized control” (Repeats double blink) Controller Display Applicable Unified ON/OFF controller Models Method of Detect the malfunction according to DIII-NET transmission data. Malfunction Detection Malfunction When no central control addresses are set to indoor units.
Page 223 Troubleshooting (OP: Unified ON/OFF Controller) SiUS39-602 Check No. 8 Check on connector of fan motor (Power supply cable) (1) Turn off the power supply. Measure the resistance between phases of U,V,W at the motor side connectors (three-core wire) to check that the values are balanced and there is no short circuiting, while connector or relay connector is disconnected.
Page 224 SiUS39-602 Troubleshooting (OP: Unified ON/OFF Controller) Check No. 12 Check on pulse input of position signal of fan inverter PCB (1) Disconnect the connector X2A while power supply OFF and operation OFF. (2) Is the voltage between pins No. 4 and 5 on X2A approx. 15 V after power supply is turned on? (3) Connect the connector X2A while power supply OFF and operation OFF.
Page 225 Troubleshooting (OP: Unified ON/OFF Controller) SiUS39-602 Troubleshooting...
Page 226: Vrv (Reyq72M, 96M)
SiUS39-602 Part 7 Replacement Procedure for INV Compressor, VRV (REYQ72M, 96M) 1. Replacement Procedure for INV Compressor, VRV (REYQ72M, 96M) ...............216 1.1 Replacement Procedure ..............216 Replacement Procedure for INV Compressor, VRV (REYQ72M, 96M)
Page 227: Replacement Procedure For Inv Compressor, Vrv (Reyq72M, 96M)
Replacement Procedure for INV Compressor, VRV (REYQ72M, 96M) SiUS39-602 Replacement Procedure for INV Compressor, VRV (REYQ72M, 96M) Replacement Procedure (1) Collect the refrigerant by using refrigerant Suction pipe recovery unit. (Since the setting on outdoor unit PCB is required for refrigerant recovery, refer to the warning plate Discharge pipe "Precautions in service work"...
Page 228: Part 8 Appendix
SiUS39-602 Part 8 Appendix 1. Piping Diagrams..................218 1.1 Outdoor Unit..................218 1.2 Indoor Unit ................... 219 1.3 BS Unit ....................221 2. Wiring Diagrams for Reference............222 2.1 Outdoor Unit..................222 2.2 Field Wiring ..................223 2.3 Indoor Unit ................... 225 2.4 BS Unit ....................
Page 229: Piping Diagrams
Piping Diagrams SiUS39-602 1. Piping Diagrams Outdoor Unit REYQ72M, 96MTJU 4D045329A Appendix...
Page 230: Indoor Unit
SiUS39-602 Piping Diagrams Indoor Unit FXFQ 12M / 18M / 24M / 30M / 36MVJU FXSQ 12M / 18M / 24M / 30M / 36M / 48MVJU FXMQ 30M / 36M / 48MVJU FXHQ 12M / 24M / 36MVJU FXAQ 07M / 09M / 12M / 18M / 24MVJU FXLQ 12M / 18M / 24MVJU FXNQ 12M / 18M / 24MVJU Gas piping connection port...
Page 231 Piping Diagrams SiUS39-602 FXDQ 4D043864H Refrigerant pipe connection port diameters Model Liquid φ1/2 φ1/4 FXDQ07M / 09M / 12M / 18MVJU φ5/8 φ3/8 FXDQ24MVJU Appendix...
Page 232: Bs Unit
SiUS39-602 Piping Diagrams BS Unit BSVQ36MVJU BSVQ60MVJU 4D045338 Appendix...
Page 233: Wiring Diagrams For Reference
Wiring Diagrams for Reference SiUS39-602 2. Wiring Diagrams for Reference Outdoor Unit REYQ72, 96MTJU Appendix...
Page 234: Field Wiring
SiUS39-602 Wiring Diagrams for Reference Field Wiring REYQ72, 96MTJU Appendix...
Page 235 Wiring Diagrams for Reference SiUS39-602 REYQ144, 168, 192MTJU Appendix...
Page 236: Indoor Unit
SiUS39-602 Wiring Diagrams for Reference Indoor Unit FXFQ12M/18M/24M/30M/36MVJU 3D042620B FXDQ07M/09M/12M/18M/24MVJU 3D050501A Appendix...
Page 237 Wiring Diagrams for Reference SiUS39-602 FXSQ12M/18M/24M/30M/36M/48MVJU 3D043177A FXMQ30M/36M/48MVJU 3D043176A Appendix...
Page 238 SiUS39-602 Wiring Diagrams for Reference FXAQ07M/09M/12M/18M/24MVJU 3D046039C FXHQ12M/24M/36M 3D048116 Appendix...
Page 239 Wiring Diagrams for Reference SiUS39-602 FXLQ12M/18M/24MVJU FXNQ12M/18M/24MVJU 3D045644A Appendix...
Page 240: Bs Unit
SiUS39-602 Wiring Diagrams for Reference BS Unit BSVQ36M / 60MVJU Appendix...
Page 241: List Of Electrical And Functional Parts
List of Electrical and Functional Parts SiUS39-602 List of Electrical and Functional Parts Outdoor Unit 3.1.1 REYQ72M, 96MTJU Model Item Name Symbol REYQ72M, 96MTJUY1B Type JT100FCVDKT Inverter Output 2.7kW Type JT170FCKTJ STD.1 Output 4.5kW Compressor Crankcase heater (INV) E1HC Crankcase heater (STD.1) E2HC Crankcase heater (STD.2) E3HC...
Page 242: Indoor Side
SiUS39-602 List of Electrical and Functional Parts Indoor Side 3.2.1 Indoor Unit Model Parts Name Symbol Remark FXFQ FXFQ FXFQ FXFQ FXFQ 12MVJU 18MVJU 24MVJU 30MVJU 36MVJU Wired Remote BRC1C71 Controller Remote Option Controller Wireless Remote BRC7C812 Controller 1 φ 45W 6P 1 φ...
Page 243 List of Electrical and Functional Parts SiUS39-602 Model Parts Name Symbol Remark FXSQ FXSQ FXSQ FXSQ FXSQ FXSQ 12MVJU 18MVJU 24MVJU 30MVJU 36MVJU 48MVJU Wired Remote BRC1C71 Option Controller Remote Controller Wireless Remote BRC4C82 Controller 1 φ 50W 4P 1 φ 85W 4P 1 φ...
Page 244 SiUS39-602 List of Electrical and Functional Parts Model Parts Name Symbol Remark FXAQ FXAQ FXAQ FXAQ FXAQ 07MVJU 09MVJU 12MVJU 18MVJU 24MVJU Wired Remote BRC1C71 Option Controller Remote Controller Wireless Remote BRC7E818 Option Controller 1 φ 40W 1 φ 43W Fan Motor Thermal protector 266°F : OFF 176°F : ON...
Page 245: Option List
Option List SiUS39-602 Option List Option List of Controllers Optional Accessories of Operation Control System Type FXLQ~MVJU FXFQ~MVJU FXSQ~MVJU FXMQ~MVJU FXAQ~MVJU FXHQ~MVJU FXDQ~MVJU FXNQ~MVJU Item Wireless BRC7C812 BRC4C82 — BRC7E818 BRC7E83 BRC4C82 Remote controller BRC1C71 Wired BRC1D71 Set back time clock BRC15A71 Remote sensor KRCS01-1...
Page 246: Option Lists (Outdoor Unit)
SiUS39-602 Option List Option Lists (Outdoor Unit) Series INVERTER “M” SERIES (Heat Recovery Type) Models Optional REYQ72, 96MTJU REYQ144, 168, 192MTJU accessories REFNET KHRP25M33H KHRP25M33H, KHRP25M72H Model header (Max. 8 branch) (Max. 8 branch) (Max. 8 branch) REFNET KHRP25M22T, KHRP25M33T,...
Page 247: Example Of Connection (R-410A Type)
Example of Connection (R-410A Type) SiUS39-602 5. Example of Connection (R-410A Type) Heat Recovery System Use of the particular branch fitting appropriate to each individual unit type not only permits the pipes to be laid with ease but also increases the reliability of the system as a whole. Type of Sample systems fitting...
Page 248: Example Of Connection
Refrigerant branch kits can only be Outdoor unit capacity type Refrigerant branch kit name indoor capacity index Refrigerant branch kit name used with R-410A. REYQ72/96 KHRP26M22T, KHRP26M33T < 72 KHRP26M22H (Max. 4 kit) REYQ144/168/192 KHRP26M22T, KHRP26M33T, KHRP26M72TU < 111 KHRP26M33H (Max.
Page 249 Example of Connection (R-410A Type) SiUS39-602 Appendix...
Page 250: Thermistor Resistance / Temperature Characteristics
SiUS39-602 Thermistor Resistance / Temperature Characteristics Thermistor Resistance / Temperature Characteristics Indoor unit For air suction For liquid pipe For gas pipe Outdoor unit For outdoor air For coil For suction pipe Outdoor unit fin thermistor R1T For Receiver gas pipe k Ω...
Page 251 Thermistor Resistance / Temperature Characteristics SiUS39-602 Outdoor Unit Thermistors for Discharge Pipe (R31T, 32T) k Ω k Ω k Ω T°F T°C T°F T°C T°F T°C 32.0 640.44 122.0 72.32 212.0 13.35 33.8 609.31 123.8 69.64 213.8 12.95 35.6 579.96 125.6 67.06 215.6...
Page 252: Pressure Sensor
SiUS39-602 Pressure Sensor Pressure Sensor = 1.38V-0.69 : Detected Pressure [High Side] = 0.57V-0.28 : Detected Pressure [Low Side] : High pressure : Output Voltage [High Side] V Detected Pressure : Low pressure : Output Voltage [Low Side] V V : Voltage (V) High Pressure (P Low Pressure (P Output Voltage (V...
Page 253: Method Of Replacing The Inverter's Power Transistors And Diode Modules
Method of Replacing The Inverter’s Power Transistors and Diode Modules SiUS39-602 Method of Replacing The Inverter’s Power Transistors and Diode Modules Method of Replacing The Inverter’s Power Transistors and Diode Modules Inverter P.C.Board Inverter PC board (A1P) PC0208 Fasten Tab X10A X11A P2 P1...
Page 254 SiUS39-602 Method of Replacing The Inverter’s Power Transistors and Diode Modules Power Transistor IGBT (On Inverter PC Board) (Decision) If other than given above, the power unit is defective and must be replaced. If using a digital tester, ∞ and continuity may be reversed. Note: Diode Module (Decision)
Page 255 Method of Replacing The Inverter’s Power Transistors and Diode Modules SiUS39-602 Appendix...
Page 256: Part 9 Precautions For New Refrigerant (R-410A)
SiUS39-602 Part 9 Precautions for New Refrigerant (R-410A) Precautions for New Refrigerant (R-410A) .........246 1.1 Outline....................246 Service Tools ..................248 Precautions for New Refrigerant (R-410A)
Page 257: Precautions For New Refrigerant (R-410A)
Precautions for New Refrigerant (R-410A) SiUS39-602 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 258 SiUS39-602 Precautions for New Refrigerant (R-410A) Thermodynamic characteristic of R-410A Temperature Steam pressure Density Specific heat at constant Specific enthalpy Specific entropy (kPa) (kg/m pressure (kJ/kgK) (kJ/kg) (kJ/KgK) Liquid Vapor Liquid Vapor Liquid Vapor Liquid Vapor Liquid Vapor Precautions for New Refrigerant (R-410A)
Page 259: Service Tools
Precautions for New Refrigerant (R-410A) SiUS39-602 Service Tools R-410A is used under higher working pressure, compared to previous refrigerants (R-22,R-407C). Furthermore, the refrigerating machine oil has been changed from Suniso oil to Ether oil, and if oil mixing is occurred, sludge results in the refrigerants and causes other problems. Therefore, gauge manifolds and charge hoses that are used with a previous refrigerant (R-22,R-407C) can not be used for products that use new refrigerants.
Page 260 SiUS39-602 Precautions for New Refrigerant (R-410A) 1. Flaring tool Flare gauge Specifications 2 Dimension A Unit:mm Tube O.D. -0.4 Nominal size Class-2 (R-410A) Class-1 (Conventional) 6.35 9.52 13.2 13.0 12.70 16.6 16.2 15.88 19.7 19.4 19.05 24.0 23.3 Differences 2 Change of dimension A Dimension A For class-1: R-407C For class-2: R-410A...
Page 261 Precautions for New Refrigerant (R-410A) SiUS39-602 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 262 SiUS39-602 Precautions for New Refrigerant (R-410A) 4. Leak tester Specifications 2 Hydrogen detecting type, etc. 2 Applicable refrigerants R-410A, R-407C, R-404A, R-507A, R-134a, etc. Differences 2 Previous testers detected chlorine. Since HFCs do not contain chlorine, new tester detects hydrogen. 5.
Page 263 Precautions for New Refrigerant (R-410A) SiUS39-602 2 1/4" → 5/16" (2min → 2.5min) 2 No oil is used in pressure test of gauges. → For prevention of contamination 2 Temperature scale indicates the relationship between pressure and temperature in gas saturated state.
Page 264 SiUS39-602 Precautions for New Refrigerant (R-410A) Regarding purchasing of service tools, please contact following address. Daikin U. S. Corporation (Dallas Office) 1645 Wallace Dr, Ste 110 Carrollton, TX 75006 “Tel : 1-972-245-1510 Fax : 1-972-245-1038” Precautions for New Refrigerant (R-410A)
Page 265 Precautions for New Refrigerant (R-410A) SiUS39-602 Precautions for New Refrigerant (R-410A)
Page 266: Index
SiUS39-602 Index Symbols “UH”Malfunction of System, Refrigerant System Address Undefined ........192 “E7”Malfunction of Outdoor Unit Fan Motor ..147 “F6”Refrigerant Overcharged ......152 “H7”Abnormal Outdoor Fan Motor Signal .... 153 A0 ................ 127 “H9” Outdoor Unit A1 ................ 128 Malfunction of Thermistor for Outdoor Air A3 ................
Page 267 SiUS39-602 Detailed Explanation of Setting Modes ....83 Discharge Pipe Protection Control ......61 J2 ................. 155 Display “Under Centralized Control” Blinks J3 ................. 156 (Repeats Double Blink) ........ 211 J4 ................. 157 Display “Under Centralized Control” Blinks J5 ................. 158 (Repeats Single Blink) ........
Page 268 SiUS39-602 Malfunction of Transmission between Inverter and BS Units ............23 Control PC Board ......... 169 Indoor Units ............. 11 MC ............... 198, 205 Outdoor Units ............ 6 Method of Replacing The Inverter’s Power Startup Control ............48 Transistors and Diode Modules ....242 STD Compressor Overload Protection ....
Page 269 SiUS39-602 Index...
Page 270: Drawings & Flow Charts
SiUS39-602 Drawings & Flow Charts Symbols “E7”Malfunction of Outdoor Unit Fan Motor ..147 BRC4C Type ............87 “F6”Refrigerant Overcharged ......152 BRC7C Type ............87 “H7”Abnormal Outdoor Fan Motor Signal .... 153 BRC7E Type ............87 “H9” Outdoor Unit Malfunction of Thermistor for Outdoor Air (R1T) ..........
Page 271 SiUS39-602 Method of Replacing The Inverter’s Power Transistors and Diode Modules ........242 Gauge manifold for R-410A ......... 251 Diode Module ..........243 Power Transistor IGBT (On Inverter PC Board) ....243 How to Enter the Service Mode ......120 Operation Lamp Blinks ........
Page 272 SiUS39-602 Vacuum pump with check valve ......250 Weigher for refrigerant charge ......252 When the Float Switch is Tripped and “AF” is Displayed on the Remote Controller ....69 When the Float Switch is Tripped During Heating Operation ............69 When the Float Switch is Tripped While Cooling OFF by Thermostat ..........
Page 273 AMERICAS 1645 Wallace Drive, Suite 110 Carrollton, TX75006 info@daikinac.com www.daikinac.com SiUS39-602 This book is made of recycled paper. Printed in U.S.A. 10/2006 AK...

Daikin REYQ72 Serveice Manual

Part 1 General Information

Part 2 Specifications

Part 3 Refrigerant Circuit

Part 4 Function

Part 5 Test Operation

Part 6 Troubleshooting

Part 7 Replacement Procedure for INV Compressor

Part 8 Appendix

Part 9 Precautions for New Refrigerant (R-410A)

Index

Drawings & Flow Charts

Quick Links

Troubleshooting

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Summary of Contents for Daikin REYQ72