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Daikin VRV II REYQ8MY1B, Service Manual

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Outline of Control (Indoor Unit)

Si39-306

94

Function

6.4

Freeze Prevention

Freeze
Prevention by Off
Cycle (Indoor
Unit)

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
the following conditions, and is also set in accordance with the conditions given below.

Conditions for starting freeze prevention: Temperature is –1°C or less for total of 40 min., or
temperature is –5°C or less for total of 10 min.
Conditions for stopping freeze prevention: Temperature is +7°C or more for 10 min.
continuously

Ex: Case where temperature is –5°C or less for total of 10 min.

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Summary of Contents for VRV II REYQ8MY1B

Page 1: ...n Tokyo office Shinjuku Sumitomo Bldg 6 1 Nishi Shinjuku 2 chome Shinjuku ku Tokyo 163 0235 Japan Zandvoordestraat 300 B 8400 Oostende Belgium l For further improvement specifications or designs are s...

Page 2: ...1 1 Outdoor Units 10 1 2 Indoor Units 21 1 3 BS Units 40 Part 3 Refrigerant Circuit 41 1 Refrigerant Circuit 42 1 1 REYQ8 10 12M 42 1 2 REYQ14 16M 44 1 3 BSVQ100 160 250M 46 2 Functional Parts Layout...

Page 3: ...roller 92 6 4 Freeze Prevention 94 Part 5 Test Operation 95 1 Test Operation 96 1 1 Procedure and Outline 96 1 2 Operation When Power is Turned On 99 2 Outdoor Unit PC Board Layout 100 3 Field Setting...

Page 4: ...e Pipe Thermistor R31 33T 177 2 26 J4 Malfunction of Heat Exchanger Gas Pipe Thermistor R81 82T 178 2 27 J5 Outdoor Unit Malfunction of Thermistor R2T for Suction Pipe 179 2 28 J6 Outdoor Unit Malfunc...

Page 5: ...ransmission between Optional Controllers for Centralized Control 216 3 4 MA Improper Combination of Optional Controllers for Centralized Control 217 3 5 MC Address Duplication Improper Setting 219 4 T...

Page 6: ...Installation Point 268 5 2 The Example of a Wrong Pattern 269 6 REFNET Pipe System 270 6 1 Layout Example 270 6 2 Max Refrigerant Piping Length 271 6 3 Example of Connection R410A Type REYQ8 48M Heat...

Page 7: ...lug socket before disassembling the equipment for a repair Working on the equipment that is connected to a power supply can cause an electrical shook If it is necessary to supply power to the equipmen...

Page 8: ...e applicable model and appropriate tools to conduct repair work Never attempt to modify the equipment The use of inappropriate parts or tools can cause an electrical shock excessive heat generation or...

Page 9: ...ce valve to prevent the refrigerant gas from leaking into the room The refrigerant gas itself is harmless but it can generate toxic gases when it contacts flames such as fan and other heaters stoves a...

Page 10: ...shock Be sure to measure the insulation resistance after the repair and make sure that the resistance is 1 Mohm or higher Faulty insulation can cause an electrical shock Be sure to check the drainage...

Page 11: ...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 sui...

Page 12: ...6 General Information 1 Part 1 General Information 1 Model Names of Indoor Outdoor Units 2 2 External Appearance 3 2 1 Indoor Units 3 2 2 Outdoor Units 4 3 Combination of Outdoor Units 5 4 Model Selec...

Page 13: ...iling mounted built in type FXSQ 20M 25M 32M 40M 50M 63M 80M 100M 125M Ceiling mounted duct type FXMQ 40M 50M 63M 80M 100M 125M 200M 250M Ceiling suspended type FXHQ 32M 63M 100M Wall mounted type FXA...

Page 14: ...M FXAQ63M Ceiling mounted cassette type Multi flow FXFQ25M FXFQ32M FXFQ40M FXFQ50M FXFQ63M FXFQ80M FXFQ100M FXFQ125M Floor standing type FXLQ20M FXLQ25M FXLQ32M FXLQ40M FXLQ50M FXLQ63M Ceiling mounted...

Page 15: ...ion 2 2 Outdoor Units H R REYQ8M 10M H R REYQ12M 14M 16M 8 10HP 12 14 16HP H R REYQ18M 20M H R REYQ22M 24M 26M 18 20HP 22 24 26HP H R REYQ28M 30M 32M H R REYQ34M 36M 28 30 32HP 34 36HP H R REYQ38M 40M...

Page 16: ...utdoor Units Up to a maximum 48HP are realized by combining 8 10 12 14 and 16HP System Capacity Number of units Module 8 10 12 14 16 8HP 1 10HP 1 12HP 1 14HP 1 16HP 1 18HP 2 20HP 2 22HP 2 24HP 2 26HP...

Page 17: ...unit 3 Total number of connectable indoor units 20 22 32 32 32 32 Total capacity of connectable indoor units kW 28 0 72 8 30 8 80 0 34 0 88 4 36 5 94 9 39 3 102 1 42 5 110 5 HP 32HP 34HP 36HP 38HP 40...

Page 18: ...M 80M 100M 125M Ceiling mounted cassette corner FXKQ 25M 32M 40M 63M Ceiling mounted built in type FXSQ 20M 25M 32M 40M 50M 63M 80M 100M 125M Ceiling mounted duct type FXMQ 40M 50M 63M 80M 100M 125M 2...

Page 19: ...Model Selection Si39 306 8 General Information...

Page 20: ...Si39 306 Specifications 9 Part 2 Specifications 1 Specifications 10 1 1 Outdoor Units 10 1 2 Indoor Units 21 1 3 BS Units 40...

Page 21: ...Starting Method Soft start Soft start Fan Type Propeller Fan Propeller Fan Motor Output kW 0 75 1 0 75 1 Air Flow Rate m min 175 180 Drive Direct Drive Direct Drive Connecting Pipes Liquid Pipe mm 9...

Page 22: ...hod Soft start Soft start Fan Type Propeller Fan Propeller Fan Motor Output kW 0 75 1 0 75 1 Air Flow Rate m min 210 210 Drive Direct Drive Direct Drive Connecting Pipes Liquid Pipe mm 12 7 Flare Conn...

Page 23: ...Soft start Soft start Fan Type Propeller Fan Propeller Fan Motor Output kW 0 75 1 0 75 2 Air Flow Rate m min 210 175 180 Drive Direct Drive Direct Drive Connecting Pipes Liquid Pipe mm 12 7 Flare Conn...

Page 24: ...Starting Method Soft start Soft start Fan Type Propeller Fan Propeller Fan Motor Output kW 0 75 2 0 75 2 Air Flow Rate m min 180 180 180 210 Drive Direct Drive Direct Drive Connecting Pipes Liquid Pi...

Page 25: ...4 5 2 7 4 5 3 0 4 5 4 5 Starting Method Soft start Soft start Fan Type Propeller Fan Propeller Fan Motor Output kW 0 75 2 0 75 2 Air Flow Rate m min 180 210 180 210 Drive Direct Drive Direct Drive Co...

Page 26: ...5 4 5 3 0 4 5 4 5 Starting Method Soft start Soft start Fan Type Propeller Fan Propeller Fan Motor Output kW 0 75 2 0 75 2 Air Flow Rate m min 210 210 210 2 Drive Direct Drive Direct Drive Connecting...

Page 27: ...2 7 4 5 2 7 4 5 2 0 4 5 4 5 Starting Method Soft start Soft start Fan Type Propeller Fan Propeller Fan Motor Output kW 0 75 2 0 75 3 Air Flow Rate m min 210 2 180 180 210 Drive Direct Drive Direct Dr...

Page 28: ...4 5 2 7 4 5 4 2 4 5 3 0 4 5 4 5 Starting Method Soft start Soft start Fan Type Propeller Fan Propeller Fan Motor Output kW 0 75 3 0 75 3 Air Flow Rate m min 180 180 210 180 210 210 Drive Direct Drive...

Page 29: ...4 5 4 5 2 7 4 5 3 0 4 5 4 5 2 Starting Method Soft start Soft start Fan Type Propeller Fan Propeller Fan Motor Output kW 0 75 3 0 75 3 Air Flow Rate m min 180 210 210 180 210 210 Drive Direct Drive Di...

Page 30: ...5 4 5 3 0 4 5 4 5 2 Starting Method Soft start Soft start Fan Type Propeller Fan Propeller Fan Motor Output kW 0 75 3 0 75 3 Air Flow Rate m min 210 210 210 210 210 210 Drive Direct Drive Direct Drive...

Page 31: ...ent m h 13 72 10 47 10 47 3 Number of Revolutions r p m 6480 2900 2 3 Motor Output Number of Units kW 3 0 4 5 4 5 3 Starting Method Soft start Fan Type Propeller Fan Motor Output kW 0 75 3 Air Flow Ra...

Page 32: ...Wool Urethane Foam Piping Connections Liquid Pipes mm 6 4 Flare Connection 6 4 Flare Connection 6 4 Flare Connection 6 4 Flare Connection Gas Pipes mm 12 7 Flare Connection 12 7 Flare Connection 12 7...

Page 33: ...Glass Wool Urethane Foam Piping Connections Liquid Pipes mm 6 4 Flare Connection 9 5 Flare Connection 9 5 Flare Connection 9 5 Flare Connection Gas Pipes mm 12 7 Flare Connection 15 9 Flare Connection...

Page 34: ...ssor Thermostat for Cooling and Heating Sound Absorbing Thermal Insulation Material Foamed Polystyrene Foamed Polyethylene Foamed Polystyrene Foamed Polyethylene Foamed Polystyrene Foamed Polyethylene...

Page 35: ...94 353 Drive Direct Drive Direct Drive Temperature Control Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Cooling and Heating Sound Absorbing Thermal Insulation Materi...

Page 36: ...al Polyurethane Form Polyurethane Form Polyurethane Form Polyurethane Form Piping Connections Liquid Pipes mm 6 4 Flare Connection 6 4 Flare Connection 6 4 Flare Connection 6 4 Flare Connection Gas Pi...

Page 37: ...sulation Material Polyurethane Form Polyurethane Form Polyurethane Form Polyurethane Form Piping Connections Liquid Pipes mm 9 5 Flare Connection 9 5 Flare Connection 9 5 Flare Connection 9 5 Flare Co...

Page 38: ...ction 6 4 Flare Connection 6 4 Flare Connection 9 5 Flare Connection Gas Pipes mm 12 7 Flare Connection 12 7 Flare Connection 12 7 Flare Connection 15 9 Flare Connection Drain Pipe mm VP25 External Di...

Page 39: ...external pressure Pa 88 39 20 88 39 20 64 39 15 Drive Direct Drive Direct Drive Direct Drive Temperature Control Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Coolin...

Page 40: ...tic external pressure Pa 88 49 20 88 59 29 88 49 20 Drive Direct Drive Direct Drive Direct Drive Temperature Control Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Coo...

Page 41: ...8 28 5 Static external pressure Pa 113 82 107 75 78 39 Drive Direct Drive Direct Drive Direct Drive Temperature Control Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for...

Page 42: ...1 Air Flow Rate H L m min 14 11 5 14 11 5 14 11 5 19 5 16 cfm 494 406 494 406 494 406 688 565 External Static Pressure Pa 157 157 118 108 4 157 157 118 108 4 157 157 118 108 4 157 160 108 98 4 Drive D...

Page 43: ...cco Fan Sirocco Fan Motor Output Number of Units W 270 1 430 1 380 2 380 2 Air Flow Rate H L m min 29 23 36 29 58 50 72 62 cfm 1 024 812 1 271 1 024 2 047 1 765 2 542 2 189 External Static Pressure Pa...

Page 44: ...Drive Direct Drive Direct Drive Direct Drive Temperature Control Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Cooli...

Page 45: ...5 cfm 265 159 282 177 318 194 Drive Direct Drive Direct Drive Direct Drive Temperature Control Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Cooling and Heating Micro...

Page 46: ...4 cfm 424 318 530 424 671 494 Drive Direct Drive Direct Drive Direct Drive Temperature Control Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Cooling and Heating Micro...

Page 47: ...fm 247 212 247 212 282 212 Drive Direct Drive Direct Drive Direct Drive Temperature Control Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Cooling and Heating Micropro...

Page 48: ...6 12 cfm 388 300 494 388 565 424 Drive Direct Drive Direct Drive Direct Drive Temperature Control Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Cooling and Heating Mi...

Page 49: ...6 8 6 cfm 247 212 247 212 282 212 Drive Direct Drive Direct Drive Direct Drive Temperature Control Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Cooling and Heating...

Page 50: ...5 14 11 16 12 cfm 388 300 494 388 565 424 Drive Direct Drive Direct Drive Direct Drive Temperature Control Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Cooling and...

Page 51: ...ndoor Unit Liquid Pipes 9 5mm Flare Connection 1 9 5mm Flare Connection 9 5mm Flare Connection Gas Pipes 15 9mm Flare Connection 1 15 9mm Flare Connection 22 2mm Flange Connection 2 Outdoor Unit Liqui...

Page 52: ...41 Part 3 Refrigerant Circuit 1 Refrigerant Circuit 42 1 1 REYQ8 10 12M 42 1 2 REYQ14 16M 44 1 3 BSVQ100 160 250M 46 2 Functional Parts Layout 47 2 1 REYQ8 10 12M 47 2 2 REYQ14 16M 49 3 Refrigerant Fl...

Page 53: ...ow pressure sensor Used to detect low pressure S S1PH HP pressure switch For INV compressor In order to prevent the increase of high pressure when a malfunction occurs this switch is activated at high...

Page 54: ...Si39 306 Refrigerant Circuit Refirgerant Circuit 43 REYQ8 10 12M V F E 10 O P D 1 K M J G W L Z N H Q T S A R I B Y X 4 9 3 2 7 11...

Page 55: ...ssure S S1PH HP pressure switch For INV compressor In order to prevent the increase of high pressure when a malfunction occurs this switch is activated at high pressure of 3 8 MPa or more to stop the...

Page 56: ...Si39 306 Refrigerant Circuit Refirgerant Circuit 45 REYQ14 16M V F E 10 O P D 1 6 K M J G W L Z N H Q T S A R I B C Y X 8 4 5 U 9 3 2 7 11...

Page 57: ...Refirgerant Circuit 1 3 BSVQ100 160 250M No Symbol Name Major function A Y1S Solenoid valve 20RT Used to sub cool the liquid refrigerant B Y3S Solenoid valve 20RH Used to changeover the cooling and he...

Page 58: ...mpressor INV Oil equalizing pipe stop valve Suction gas side stop valve Discharge gas side stop valve Electronic expansion valve Sub Y2E Electronic expansion valve Main Y1E Electronic expansion valve...

Page 59: ...e R7T Pressure sensor Low pressure S2NPL Thermistor Heat exchanger deicer R4T Thermistor Main heat exchanger gas pipe R81T Thermistor Suction pipe R2T Thermistor Sub cooling heat exchanger outlet R5T...

Page 60: ...valve Electronic expansion valve Sub Y2E Electronic expansion valve Main Y1E Electronic expansion valve Subcooling Y3E 4 way valve Main 20S1 Compressor INV Liquid side stop valve Suction gas side sto...

Page 61: ...heat exchanger gas pipe R81T Thermistor Oil equalizer pipe R7T Thermistor Heat exchanger deicer R4T Thermistor Suction pipe R2T Pressure sensor Low pressure S2NPL Pressure sensor High pressure S1NPH P...

Page 62: ...r High temperature high pressure gas High temperature high pressure liquid Low temperature low pressure liquid or gas Indoor unit operation Oil equalizer pipe to other outdoor units Liquid piping to o...

Page 63: ...High temperature high pressure liquid Low temperature low pressure liquid or gas Indoor unit operation Oil equalizer pipe to other outdoor units Liquid piping to other outdoor units Discharge gas pip...

Page 64: ...s High temperature high pressure liquid Low temperature low pressure liquid or gas Indoor unit operation Oil equalizer pipe to other outdoor units Liquid piping to other outdoor units Discharge gas pi...

Page 65: ...ilter High temperature high pressure gas High temperature high pressure liquid Low temperature low pressure liquid or gas Indoor unit operation Oil equalizer pipe to other outdoor units Liquid piping...

Page 66: ...valve Filter Filter High temperature high pressure gas High temperature high pressure liquid Low temperature low pressure liquid or gas Indoor unit operation Oil equalizer pipe to other outdoor units...

Page 67: ...ature high pressure liquid Low temperature low pressure liquid or gas Indoor unit operation Oil equalizer pipe to other outdoor units Liquid piping to other outdoor units Discharge gas piping to other...

Page 68: ...ol 74 3 5 Pump down Residual Operation 75 3 6 Restart Standby 76 3 7 Stopping Operation 77 3 8 Pressure Equalization Prior to Startup 79 4 Protection Control 80 4 1 High Pressure Protection Control 80...

Page 69: ...ration Compressor PI control Motorized valve PI control Protection control Indoor unit thermostat ON Defrost IN conditions are met No Yes Defrosting operation Cooling or heating operation Outdoor unit...

Page 70: ...n when outdoor temperature is low Receiver gas discharge valve SVG OFF Discharge pipe stop valve SVR OFF Non operating unit liquid pipe stop valve SVSL OFF High pressure gas pipe pressure reduction va...

Page 71: ...on Controls compressor capacity to adjust Te to achieve target value TeS Te Low pressure equivalent saturation temperature C Te setting TeS Target Te value Varies depending on Te setting operating fre...

Page 72: ...YQ40 42 44M REYQ24 26 28M REYQ30 32M REYQ8 10 12M REYQ14 16M INV STD1 No 1 No 2 INV STD1 STD2 No 1 No 2 No 3 INV STD1 No 1 No 3 INV STD1 No 2 No 4 INV STD1 No 1 No 3 INV STD1 STD2 No 2 No 4 No 5 Patte...

Page 73: ...29 210Hz 189Hz OFF OFF 30 52Hz 189Hz ON OFF 31 88Hz 189Hz ON OFF 32 124Hz 189Hz ON OFF 33 158Hz 189Hz ON OFF 34 189Hz 189Hz ON OFF 35 210Hz 189Hz ON OFF 36 52Hz 189Hz ON ON 37 88Hz 189Hz ON ON 38 124H...

Page 74: ...F OFF 6 81Hz OFF OFF OFF OFF OFF OFF 7 88Hz OFF OFF OFF OFF OFF OFF 8 96Hz OFF OFF OFF OFF OFF OFF 9 104Hz OFF OFF OFF OFF OFF OFF 10 110Hz OFF OFF OFF OFF OFF OFF 11 116Hz OFF OFF OFF OFF OFF OFF 12...

Page 75: ...32 124Hz 189Hz 189Hz OFF OFF OFF OFF OFF 33 158Hz 189Hz 189Hz OFF OFF OFF OFF OFF 34 189Hz 189Hz 189Hz OFF OFF OFF OFF OFF 35 210Hz 189Hz 189Hz OFF OFF OFF OFF OFF 36 52Hz 189Hz 189Hz ON OFF OFF OFF...

Page 76: ...z 189Hz 189Hz OFF OFF OFF OFF OFF OFF 35 210Hz 189Hz 189Hz OFF OFF OFF OFF OFF OFF 36 52Hz 189Hz 189Hz ON OFF OFF OFF OFF OFF 37 88Hz 189Hz 189Hz ON OFF OFF OFF OFF OFF 38 124Hz 189Hz 189Hz ON OFF OFF...

Page 77: ...ut varies depending on the discharge pipe superheated degree of inverter compressor Sub cooling Motorized Valve EV3 Control Makes PI control of the motorized valve Y2E to keep the superheated degree o...

Page 78: ...P8 STEP7 STEP6 STEP5 STEP4 STEP3 STEP2 STEP1 STEP9 Pc 2 8MPa Pc HP pressure sensor detection value Pc 3 1MPa Pc 3 3MPa Pc 1 8MPa Pc 2 7MPa Pc 1 8MPa Pc 2 7MPa Pc 1 8MPa Pc 2 7MPa Pc 1 8MPa Pc 2 7MPa P...

Page 79: ...unit 2 Main heat exchanger Sub heat exchanger Not used Condenser Not used Not used Condenser Not used Master unit Slave unit 1 Slave unit 2 Main heat exchanger Sub heat exchanger Evaporator Condenser...

Page 80: ...quency increases by 1 step until Pc Pe 0 4MPa Outdoor unit fan High pressure control Initial compressor operating frequency is set to STEP1 1 step increases with Pc 2 2 MPa 1 step decreases with Pc 1...

Page 81: ...N Oil equalization valve SVO ON In the case of multi outdoor unit system this valve repeats ON OFF operation at regular intervals of time Receiver gas charging valve SVL OFF Receiver gas discharge val...

Page 82: ...s listed in the table above from the oil return operation Actuators are based on REYQ16M Actuator Oil return preparation operation Oil return operation Post oil return operation Compressor Upper limit...

Page 83: ...tion Post oil return operation Compressor Upper limit control 124 Hz ON OFF 1 step increase from 74Hz OFF OFF to Pc Pe 0 4 MPa time Outdoor unit fan STEP8 or STEP9 OFF STEP9 Four way valve 1 Heat exch...

Page 84: ...ax 2 hours Actuator Defrost preparation operation Defrost operation Post defrost operation Compressor Upper limit control 143 Hz ON ON 1 step increase from 74Hz OFF OFF to Pc Pe 0 4 MPa Outdoor unit f...

Page 85: ...or Pressure equalizing preparation operation Equalization operation Compressor PI control 74 Hz OFF OFF Outdoor unit fan Heat exchange mode STEP8 Four way valve 1 Heat exchange mode ON Four way valve...

Page 86: ...lization valve SVO ON OFF Receiver gas charging valve SVL OFF OFF Receiver gas discharge valve SVG OFF OFF Discharge pipe stop valve SVR OFF OFF Non operating unit liquid pipe stop valve SVSL OFF ON H...

Page 87: ...FF Four way valve 1 Holds ON Four way valve 2 Holds ON Main motorized valve EV1 0 pls Sub motorized valve EV2 0 pls Sub cooling motorized valve EV2 0 pls Hot gas bypass valve SVP OFF Oil equalization...

Page 88: ...valve 1 Holds ON Four way valve 2 Holds ON Main motorized valve EV1 0 pls Sub motorized valve EV2 0 pls Sub cooling motorized valve EV3 0 pls Hot gas bypass valve SVP OFF Oil equalization valve SVO OF...

Page 89: ...t liquid pipe stop valve SVSL OFF ON High pressure gas pipe pressure reduction valve SVC ON ON Mode transition conditions To Mode B when Tc Tl 0 27 Tc Ta 6 To Mode A when gas shortage signal is sent f...

Page 90: ...YQ16M Actuator Operation Compressor OFF Outdoor unit fan Cooling OFF Heating STEP 4 Four way valve 1 Holds ON Four way valve 2 Holds ON Main motorized valve EV1 0 pls Sub motorized valve EV2 0 pls Sub...

Page 91: ...re standby INV upper limit frequency 210 Hz High pressure limited Pc 3 48MPa Pc 3 58MPa Pc 3 2MPa Pc 3 53MPa STD compressor standby for 5 mins Pc HP pressure sensor detection value for each outdoor un...

Page 92: ...ow pressure not limited Pe 0 35MPa Low pressure standby Low pressure limited All STD compressors stop Master unit 52 Hz OFF OFF Slave unit Stop Pe 0 25MPa Pe 0 40MPa Pe 0 07MPa Pe LP pressure sensor d...

Page 93: ...protection control not limited Discharge pipe temp control standby INV upper limit frequency 1 step down from current compressor frequency INV upper limit frequency 1 step up from current compressor f...

Page 94: ...requency INV upper limit frequency 1 step up from current compressor frequency Invertercurrent Ia Inverter current Ia continues for 3 min or more Inverter current Ib continues for 260 sec Inverter cur...

Page 95: ...ing due to overcurrent to the compressor resulting from failures of STD compressor such as locking STD compressor ON CT detection current value A for more than 3 sec STD compressor OFF for 30 min Dema...

Page 96: ...outdoor unit rotation in combination of 3 outdoor units Master unit slave unit 1 and slave unit 2 in this section are the names for installation They are determined in installation work and not change...

Page 97: ...STD2 compressors from operating Set setting mode 2 from No 19 to No 2 REYQ8M to REYQ16M Procedure 1 Press and hold the MODE button BS1 for 5 sec or more 2 Press the SET button BS2 19 times 3 Press the...

Page 98: ...hibition of operation is set with each outdoor unit Make the following settings with the master unit Setting with the slave unit becomes disabled Discriminate the operating status of the master unit s...

Page 99: ...y 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 Demand 1 setti...

Page 100: ...utton 1 4 given in the figure below 6 1 1 When the Float Switch is Tripped While the Cooling Thermostat is ON 1 The objective of residual operation is to completely drain any moisture adhering to the...

Page 101: ...et 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 is Displayed on the Remo...

Page 102: ...multi flow and corner types P0 P1 P2 P4 P3 P0 P1 P2 P4 P3 P0 P0 P1 P2 P4 P4 P2 P1 P0 P4 P4 P3 P2 P1 P0 P3 Existing position Draft prevention position Standard Setting position Ceiling soiling prevent...

Page 103: ...temperature Ex When cooling Assuming the preset temperature in the figure above is 24 C and the suction temperature has changed from 18 C to 30 C A F This example also assumes there are several other...

Page 104: ...be used so that suction temperature is higher than the preset temperature Ex When heating Assuming the preset temperature in the figure above is 24 C and the suction temperature has changed from 18 C...

Page 105: ...unit enters freeze prevention operation in accordance with the following conditions and is also set in accordance with the conditions given below Conditions for starting freeze prevention Temperature...

Page 106: ...Operation 1 Test Operation 96 1 1 Procedure and Outline 96 1 2 Operation When Power is Turned On 99 2 Outdoor Unit PC Board Layout 100 3 Field Setting 101 3 1 Field Setting from Remote Controller 101...

Page 107: ...e design pressure of this product is 3 8MPa Are pipe insulation materials installed securely Liquid and gas pipes need to be insulated Otherwise causes water leak Are respective stop valves on liquid...

Page 108: ...on outdoor unit PC board H2P flickers test operation 2Remote controller Indicates On Centralized Control on upper right Indicates Test Operation on lower left LED display 7 ON 7 7 OFF 9 9 Blink H1P H...

Page 109: ...t the indoor outdoor units can be operated normally When an abnormal noise due to liquid compression by the compressor can be heard stop the unit immediately and turn on the crankcase heater to heat u...

Page 110: ...nutes to automatically set the address indoor outdoor address etc Status Outdoor unit Test lamp H2P Blinks Can also be set during operation described above Indoor unit If ON button is pushed during op...

Page 111: ...oor Outdoor Multi outdoor 2 Set mode display LED 3 Mode setting switch 1 Microcomputer normal monitor 4 Local setting switch Connection terminal for transmission use DS1 DS2 DS3 HAP V3054 1 Microcompu...

Page 112: ...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 3 During group control and you want to set by each individual indoo...

Page 113: ...mode 2 Select the desired mode No with the button 3 Pushing the button select the first code No 4 Pushing the button select the second code No 5 Push the timer button and check the settings 6 Push the...

Page 114: ...the FIELD SET MODE 3 Select the mode No 00 with BS2 BUTTON temperature setting and BS3 BUTTON temperature setting 4 Select the group No with BS9 BUTTON set A and BS10 BUTTON set B Group Nos increase i...

Page 115: ...Set when filter sign is not to be displayed Display No display 12 22 0 Optional accessories output selection field selection of output for adaptor for wiring Indoor unit turned ON by thermostat Opera...

Page 116: ...Floor standing type Concealed Floor standing type Multi flow Double flow Corner type FXFQ FXCQ FXKQ FXSQ FXMQ FXHQ FXAQ FXLQ FXNQ Filter sign Ultra long life filter sign Remote controller thermostat s...

Page 117: ...air conditioners with the setting the units may start automatically after power failure reset or the main power supply turned on again return to the same operation condition as that of before power fa...

Page 118: ...ounted type Standard 02 Wall mounted type Slight increase 03 Wall mounted type Normal increase Mode No First code No Second code No Setting Ceiling height 4 way Outlets 3 way Outlets 2 way Outlets 13...

Page 119: ...te switching at discharge grille for field air flow rate switching When the optional parts high performance filter etc is installed sets to change fan speed for securing air flow rate Follow the instr...

Page 120: ...ys only the group No within the range selected by the switch for setting each address 5 Push the timer button to define the selected group No 6 Push the button to return to the normal mode Even if not...

Page 121: ...out 1 minute on the liquid crystal display This is not an operative fault Centralized Remote Controller F1 F2 F1 F2 F1 F2 F1 F2 P1 P2 RC RC RC RC RC F1 F2 P1 P2 F1 F2 P1 P2 F1 F2 P1 P2 F1 F2 P1 P2 F1...

Page 122: ...ion mode setting by remote controller can be set and displayed by operation modes 0 through 19 ON OFF control impossible by remote controller Used when you want to turn on off by central remote contro...

Page 123: ...by remote controller Control mode Operation OFF Temperature control Operation mode setting Unified operation individual operation by central remote controller or operation controlled by timer Unified...

Page 124: ...ON Not used Do not change the factory settings OFF Factory set DS2 1 4 ON Not used Do not change the factory settings OFF Factory set DS3 1 2 ON Not used Do not change the factory settings OFF Factor...

Page 125: ...H1P Push the BS1 MODE button one time Blinking MODE MODE Off H1P Setting mode 2 MODE On H1P Push and hold the BS1 MODE button for 5 seconds Push the BS1 MODE button one time Normal V2761 Using the MOD...

Page 126: ...Malfunction 7 8 8 7 7 7 7 Preparing Test run 7 9 8 7 7 7 7 Normal 7 7 8 7 7 7 7 During low noise operation 7 7 8 7 7 8 7 Normal 7 7 8 7 7 7 7 During demand operation 7 7 8 7 7 7 8 8 ON 7 OFF 9 Blinkin...

Page 127: ...a simple way The operating time is based on Starting set and Ending set 25 Low noise setting Sets low noise level when the low noise signal is input from outside 26 Night time low noise control start...

Page 128: ...applicable outdoor unit from operating should there be any faulty part in multi outdoor unit system Since the comfortable environment is extremely impaired prompt replacement of the part is required 3...

Page 129: ...77778 ON 8777787 12 External low noise demand setting 8 7 7 8 8 7 7 External low noise demand NO 8777778 External low noise demand YES 8777787 13 Airnet address 8 7 7 8 8 7 8 Address 0 8777777 Binary...

Page 130: ...8777778 ON 8777787 29 Capacity precedence setting 8 7 8 8 8 7 8 OFF 8777778 ON 8777787 30 Demand setting 1 8 7 8 8 8 8 7 60 demand 8777778 70 demand 8777787 80 demand 8777877 32 Continuous demand set...

Page 131: ...ontents of malfunction the latest 8 7 7 8 8 8 7 Malfunction code table Refer page 150 151 15 Contents of malfunction 1 cycle before 8 7 7 8 8 8 8 16 Contents of malfunction 2 cycle before 8 7 8 7 7 7...

Page 132: ...which translates to 16 4 2 22 base 10 number In other words the address is 22 The number of terminal blocks for No 12 and 13 is expressed as an 8 digit binary number which is the combination of four u...

Page 133: ...1 2 1 2 F2 B C A F2 F1 F1 F2 F1 Outdoor unit TOIN DUNIT TOOUT DUNIT F1 F2 F1 F2 F1 F2 F1 F2 IN D OUT D BS REMOTE CONTROLLER BS unit A F1 F2 F1 F2 IN D OUT D BS BS unit B COOL HEAT selector Branch wir...

Page 134: ...low noise instructions are neglected to switch to normal operation Set by Setting Mode 2 B When the low noise operation is carried out automatically at night The outdoor unit external control adapter...

Page 135: ...Field Setting Si39 306 124 Test Operation Image of operation in the case of A Image of operation in the case of B Image of operation in the case of A B...

Page 136: ...e External low noise Demand YES Set by Setting Mode 2 Set the Demand 1 level setting on the outdoor unit PCB as the need arises During the demand level 1 instruction the power consumption can be saved...

Page 137: ...set to ON OFF has been set at factory the power consumption can be set with the Demand 1 level setting 70 of rated power consumption has been set at factory Power consumption Rated power consumption 8...

Page 138: ...1P on c In setting 1 push and hold the BS1 MODE button for more than 5 seconds Setting mode 2 is entered and H1P lights d Push the BS2 SET button several times and match the LED display with the Setti...

Page 139: ...z PM 8 00 z z z z z PM 10 00 Factory setting z z z z z PM 0 00 z z z z z 27 Night time low noise end setting z z AM 6 00 z z z z z AM 7 00 z z z z z AM 8 00 Factory setting z z z z z 29 Capacity prec...

Page 140: ...l equalizing Stop valve closed Is all refrigerant charged Is all refrigerant charged YES YES NO Turn off the power Charge through Service port of LIQ Stop valve Open DISCHARGE LIQUID SUCTION Oil equal...

Page 141: ...t complete within 30 minutes set the A Additional refrigerant charging operation again to start charging When the charging immediately stops even by restarting the refrigerant is charged excessively T...

Page 142: ...3 2 7 Check Operation To prevent any trouble in the period of installation at site the system is provided with a test operation mode enabling check for incorrect wiring stop valve left in closed comin...

Page 143: ...y during inverter operation The waveform can be checked by disconnecting the wiring of compressor After the completion of checks return the system to the previous mode and wait for 30 seconds or more...

Page 144: ...it Malfunction of Thermistor R1T for Suction Air 161 2 12 CJ Indoor Unit Malfunction of Thermostat Sensor in Remote Controller 162 2 13 E1 Outdoor Unit PC Board Defect 163 2 14 E3 Outdoor Unit Actuati...

Page 145: ...ndoor and Outdoor Units in the Same System 206 2 51 UA Excessive Number of Indoor Units 208 2 52 UC Address Duplication of Centralized Remote Controller 209 2 53 UE Malfunction of Transmission between...

Page 146: ...on button for more than 4 seconds Press Inspection Test Operation button once Press Inspection Test Operation button once Or after 30 minutes After 10 seconds Press Inspection Test Operation button on...

Page 147: ...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...

Page 148: ...the following operations 1 short beep Conduct steps 3 and 4 Continue the operation in step 4 until a buzzer remains ON The continuous buzzer indicates that the malfunction code is confirmed Continuous...

Page 149: ...Troubleshooting by Remote Controller Si39 306 138 Troubleshooting The lower digit of the code changes as shown below when the UP and DOWN buttons are pressed...

Page 150: ...Si39 306 Troubleshooting by Remote Controller Troubleshooting 139...

Page 151: ...FXFQ FXHQ FXSQ FXLQ FXMQ FXNQ FXZQ Type VRV System Inverter K Series R407C VRV PLUS Series VRV Heat Recovery Series High COP type R407C L Series VRV II VRV II Heat Recovery Display A A 1 A A 3 A 9 2...

Page 152: ...group control only Select the indoor unit No to be set with the time mode For wireless remote controller button 3 Make the settings required for each mode Modes 41 44 45 In case of Mode 44 45 push bu...

Page 153: ...want to search for the unit No By selecting the unit No with the button you can turn the fan of each indoor unit on forced ON individually 44 Individual setting Set the fan speed and air flow directi...

Page 154: ...f 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 When there is a stop due to...

Page 155: ...9 9 9 9 Malfunction of moving part of electronic expansion valve Y1E 3E 170 F3 9 9 9 Abnormal discharge pipe temperature 172 F6 9 9 9 Refrigerant overcharged 173 H3 8 7 9 Malfunction of High pressure...

Page 156: ...f transmission between indoor unit and outdoor unit in the same system 206 UA 9 9 9 Excessive number of indoor units etc 208 UC 8 8 8 Address duplication of central remote controller 209 UE 9 9 9 Malf...

Page 157: ...bnormal connection with excessive number of indoor units Conflict of refrigerant type in indoor units Incorrect wiring Auto address error Malfunction of multi level converter abnormality in conflict c...

Page 158: ...lay section Malfunction location Master Slave 1 Slave 2 Malfunction code Confirmation of malfunction 1 Confirmation of malfunction 2 Confirmation of malfunction 3 LED1 LED2 LED3 LED4 LED5 LED6 LED7 E3...

Page 159: ...l protection device Improper field set Defect of indoor unit PC board Troubleshooting V2776 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occur...

Page 160: ...be correctly received from the E PROM E PROM Type of nonvolatile memory Maintains memory contents even when the power supply is turned off Supposed Causes Defect of indoor unit PC board Troubleshootin...

Page 161: ...FXKQ FXHQ Option FXMQ Option Method of Malfunction Detection By float switch OFF detection Malfunction Decision Conditions When rise of water level is not a condition and the float switch goes OFF Su...

Page 162: ...or unit PC board Loose connection of connector NO NO NO YES YES NO NO YES NO YES NO NO The float switch is connected to X8A of the indoor unit PC board NO The drain pump works when the power supply is...

Page 163: ...output voltage to the fan is maximum Supposed Causes Fan motor lock Disconnected or faulty wiring between fan motor and PC board Troubleshooting Caution Be sure to turn off power switch before connect...

Page 164: ...etection Utilizes ON OFF of the limit switch when the motor turns Malfunction Decision Conditions When ON OFF of the micro switch for positioning cannot be reversed even though the swing flap motor is...

Page 165: ...ce indoor unit PC board NO NO YES NO YES NO YES YES NO Indoor unit is a model equipped with a swing flap function The swing motor works when the power supply is turned off and then back on When the ai...

Page 166: ...ectronic expansion valve Defect of indoor unit PC board Defect of connecting cable Troubleshooting V2781 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage...

Page 167: ...ectronic expansion valve Discount the electronic expansion valve from the PC board and check the continuity between the connector pins Normal Continuity No continuity Pin No 1 White 2 Yellow 3 Orange...

Page 168: ...he float switch changes from ON to OFF while the compressor is in non operation Supposed Causes Humidifier unit optional accessory leaking Defect of drain pipe upward slope etc Defect of indoor unit P...

Page 169: ...n the capacity code is not contained in the PC board s memory and the capacity setting adaptor is not connected 2 When a capacity that doesn t exist for that unit is set Supposed Causes You have forgo...

Page 170: ...cted or shorted while the unit is running Supposed Causes Defect of thermistor R2T for liquid pipe Defect of indoor unit PC board Troubleshooting 2 Refer to thermistor resistance temperature character...

Page 171: ...ed while the unit is running Supposed Causes Defect of indoor unit thermistor R3T for gas pipe Defect of indoor unit PC board Troubleshooting 2 Refer to thermistor resistance temperature characteristi...

Page 172: ...nnected or shorted while the unit is running Supposed Causes Defect of indoor unit thermistor R1T for air inlet Defect of indoor unit PC board Troubleshooting 2 Refer to thermistor resistance temperat...

Page 173: ...mes disconnected or shorted while the unit is running Supposed Causes Defect of remote controller thermistor Defect of remote controller PC board Troubleshooting Notes In case of remote controller the...

Page 174: ...rrectly received from the E PROM E PROM Type of nonvolatile memory Maintains memory contents even when the power supply is turned off Supposed Causes Defect of outdoor unit PC board A1P Troubleshootin...

Page 175: ...power failure Faulty high pressure sensor Troubleshooting 1 Actuation of high pressure switch HPS The outdoor unit PC board s connector is disconnected Is the outdoor unit heat exchanger dirty Defect...

Page 176: ...ened Troubleshooting 1 Voltage measurement point 2 Refer to pressure sensor pressure voltage characteristics table on P 277 V2791 Caution Be sure to turn off power switch before connect or disconnect...

Page 177: ...detected Supposed Causes Compressor lock High differential pressure 0 5MPa or more Incorrect UVWN wiring Faulty inverter PC board Stop valve is left in closed Troubleshooting Check the installation co...

Page 178: ...ned value for 2 seconds 400 V unit 15 0 A Supposed Causes Closed stop value Obstacles at the discharge port Improper power voltage Faulty magnetic switch Faulty compressor Troubleshooting Is the stop...

Page 179: ...system shuts down Supposed Causes Malfunction of fan motor The harness connector between fan motor and PC board is left in disconnected or faulty connector Fan does not run due to foreign matters tang...

Page 180: ...wer supply cable YES Is the LED HAP on fan inverter PCB blinking NO Check No 9 Check on connector of fan motor Signal wire YES Are the resistance values between phases of U V W balanced Is there any s...

Page 181: ...d A1P Defect of connecting cable Troubleshooting V3067 YES Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Return to normal Turn power s...

Page 182: ...part of the electronic expansion valve Disconnect the electronic expansion valve from the PC board and check the continuity between the connector pins Normal Continuity Approx 300 Continuity Approx 1...

Page 183: ...e pipe temperature rises suddenly Supposed Causes Faulty discharge pipe temperature sensor Faulty connection of discharge pipe temperature sensor Faulty outdoor unit PCB Troubleshooting 2 Refer to the...

Page 184: ...gas pipe temperature is lower than evaporating temperature during test operation Supposed Causes Refrigerant overcharge Disconnection of the receiver gas pipe thermistor Troubleshooting V2797 Caution...

Page 185: ...r connection cable Fan Inverter PC board malfunction Troubleshooting 1 Disconnect connector X2A and measure the following resistance V3069 Turn power off Check of fan motor connector H1 Caution Be sur...

Page 186: ...t of thermistor R1T for outdoor air Defect of outdoor unit PC board A1P Troubleshooting The alarm indicator is displayed when the fan only is being used also 2 Refer to thermistor resistance temperatu...

Page 187: ...comes 5A or lower or 40A or more during standard compressor operation Supposed Causes Faulty current sensor Faulty outdoor unit PC board Troubleshooting V3071 Caution Be sure to turn off power switch...

Page 188: ...Defect of thermistor R31T R32T or R33T for outdoor unit discharge pipe Defect of outdoor unit PC board A1P Troubleshooting The alarm indicator is displayed when the fan is being used also Notes 8 12 H...

Page 189: ...upposed Causes Faulty heat exchanger gas pipe thermistor R81 82T Faulty outdoor unit PC board Troubleshooting 2 Refer to thermistor resistance temperature characteristics table on P 275 V3075 Caution...

Page 190: ...ature thermistor is detected Supposed Causes Defect of thermistor R2T for outdoor unit suction pipe Defect of outdoor unit PC board A1P Troubleshooting 2 Refer to thermistor resistance temperature cha...

Page 191: ...change thermistor is detected Supposed Causes Defect of thermistor R4T for outdoor unit coil Defect of outdoor unit PC board A1P Troubleshooting 2 Refer to thermistor resistance temperature characteri...

Page 192: ...or open Supposed Causes Faulty receiver outlet liquid pipe thermistor R6T Faulty outdoor unit PC board Troubleshooting 2 Refer to thermistor resistance temperature characteristics table on P 275 V3075...

Page 193: ...pen Supposed Causes Faulty oil equalizing pipe thermistor R7T Faulty outdoor unit PC board Troubleshooting 2 Refer to thermistor resistance temperature characteristics table on P 275 V3075 Caution Be...

Page 194: ...en Supposed Causes Faulty receiver gas pipe thermistor R5T Faulty outdoor unit PC board Troubleshooting 2 Refer to thermistor resistance temperature characteristics table on P 275 V3075 Caution Be sur...

Page 195: ...ection of low pressure sensor with wrong connection Defect of outdoor unit PC board Troubleshooting 1 Voltage measurement point 2 Refer to pressure sensor pressure voltage characteristics table on P 2...

Page 196: ...igh pressure sensor with wrong connection Defect of outdoor unit PC board Troubleshooting 1 Voltage measurement point 2 Refer to pressure sensor pressure voltage characteristics table on P 277 V2808 C...

Page 197: ...ctuation of fin thermal Actuates above 89 C Defect of inverter PC board Defect of fin thermistor Troubleshooting 2 Refer to thermistor resistance temperature characteristics table on P 275 V2811 Resis...

Page 198: ...voltage than actual is displayed when the inverter output voltage is checked by tester Refer check 13 to P 234 V2812 Caution Be sure to turn off power switch before connect or disconnect connector or...

Page 199: ...ector or parts damage may be occurred Inverter output voltage check Inverter output voltage is not balanced Normal if within 10V Must be measured when frequency is stable Compressor overload Inspectio...

Page 200: ...off power switch before connect or disconnect connector or parts damage may be occurred Inverter output voltage check Inverter output voltage is not balanced Normal if within 10V Must be measured whe...

Page 201: ...nction Detection Check the communication state between inverter PC board and control PC board by micro computer Malfunction Decision Conditions When the correct communication is not conducted in certa...

Page 202: ...icrocomputer monitor green on the inverter P C B is blinking The voltage between red and white of X1A on the inverter unit is 220 240 V YES Defect of outdoor main PC board or defect of inverter PC boa...

Page 203: ...fect After turning the power supply OFF check and repair the main circuit wiring or parts 1 Loose or disconnected wiring between power supply and inverter 2 K1M contact disposition fusion or contact i...

Page 204: ...Malfunction is not decided while the unit operation is continued P4 will be displayed by pressing the inspection button Supposed Causes Defect of radiator fin temperature sensor Defect of inverter PC...

Page 205: ...C Board is correct type or not by using communication data Supposed Causes Mismatching of Inverter Fan driver P C Board type Defect of initial setting Troubleshooting YES YES Is the P C Board type cor...

Page 206: ...racteristics table on P 275 2 Refer to pressure sensor pressure voltage characteristics table on P 277 V2819 The suction pipe temperature minus coil temperature is 20 C or higher Resistance is normal...

Page 207: ...alfunction Decision Conditions Supposed Causes Power supply reverse phase Power supply open phase Defect of outdoor PC board A1P Troubleshooting V2820 Operation is normal if one place of power supply...

Page 208: ...U2 Applicable Models REYQ8 48M Method of Malfunction Detection Detection of voltage of main circuit capacitor built in the inverter and power supply voltage Malfunction Decision Conditions Supposed C...

Page 209: ...rd YES NO NO Does the voltage between terminals P and N gradually rise to 556 VDC Y1 after turning on Monitor field power supply Replace the inverter PC board The voltage between the P and N terminals...

Page 210: ...s Malfunction is decided when the unit starts operation without check operation Supposed Causes Check operation is not executed Troubleshooting V3052 Has the check operation performed on Outdoor unit...

Page 211: ...Detection Microcomputer checks if transmission between indoor and outdoor units is normal Malfunction Decision Conditions When transmission is not carried out normally for a certain amount of time Sup...

Page 212: ...oor unit transmission wiring YES NO NO YES Has the indoor or outdoor unit PC board been replaced or has the indoor outdoor or outdoor outdoor unit transmission wiring been modified All indoor unit rem...

Page 213: ...it PC board Defect of remote controller PC board Malfunction of transmission caused by noise Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or parts da...

Page 214: ...rmal Malfunction Decision Conditions When transmission is not carried out normally for a certain amount of time Supposed Causes Improper connection of transmission wiring between outdoor unit and outd...

Page 215: ...ECT to IND YES Fix the outdoor units multi connection transmission wiring and reset power NO Is the outdoor units multi connection transmission wiring normal Is the indoor outdoor unit transmission wi...

Page 216: ...tinue for specified period Supposed Causes Malfunction of transmission between main and sub remote controller Connection between sub remote controllers Defect of remote controller PC board Troubleshoo...

Page 217: ...play U9 Applicable Models All models of indoor units Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes Malfunction of transmission within or outside of other system Malfu...

Page 218: ...es or more NO NO Refer to failure diagnosis for U4 malfunction code YES YES U9 has been displayed for 2 minutes or more NO Turn on all indoor units Refer to failure diagnosis for A1 malfunction code N...

Page 219: ...single outdoor unit system depends on the type of outdoor unit Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred V2827 The total of indoo...

Page 220: ...tions Supposed Causes Address duplication of centralized remote controller Defect of indoor unit PC board Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connecto...

Page 221: ...alfunction Detection Microcomputer checks if transmission between indoor unit and centralized remote controller is normal Malfunction Decision Conditions When transmission is not carried out normally...

Page 222: ...ired incorrectly Is the master controller s connector for setting master controller disconnected Set the group No correctly Replace indoor unit PC board Fix the wiring correctly Fix the wiring correct...

Page 223: ...or unit has been off for more than 12 hours or if it is not carried out after running all connected indoor units in the fan mode for at least an hour Caution Be sure to turn off power switch before co...

Page 224: ...31 NO YES YES After fixing incorrect wiring push and hold the RESET button on the master outdoor unit PC board for 5 seconds Normal NO Is electricity being introduce for the first time after installat...

Page 225: ...efect of indoor unit PC board Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Is the power supply turned on for indoor u...

Page 226: ...Board Defect Remote Controller Display M1 Applicable Models Centralized remote controller Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes Defect of centralized remote...

Page 227: ...transmission wiring disconnected or wired incorrectly The PC board of one of the optional controllers for centralized control is defective Try turning on off using each optional controllers for centra...

Page 228: ...Control Remote Controller Display MA Applicable Models Centralized remote controller Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes Improper combination of optional c...

Page 229: ...the power supply for all optional controllers for centralized control simultaneously Arrange so that the connector for setting master control is connected to one controller for centralized control and...

Page 230: ...onditions Supposed Causes Address duplication of centralized remote controller Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be oc...

Page 231: ...ction Microcomputer checks if transmission between indoor unit and centralized remote controller is normal Malfunction Decision Conditions When transmission is not carried out normally for a certain a...

Page 232: ...incorrectly Is the master controller s connector for setting master controller disconnected Set the group No correctly Replace indoor unit PC board Fix the wiring correctly Fix the wiring correctly C...

Page 233: ...ection Malfunction Decision Conditions Supposed Causes Defect of schedule timer PC board Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or parts damage...

Page 234: ...ransmission wiring disconnected or wired incorrectly The PC board of one of the optional controllers for centralized control is defective Try turning on off using each optional controllers for central...

Page 235: ...e Controller Display MA Applicable Models All models of indoor units schedule timer Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes Improper combination of optional con...

Page 236: ...optional controllers for centralized control simultaneously YES YES NO Is the schedule timer connected Are there two or more optional controllers for centralized control connected with the connector f...

Page 237: ...n Conditions Supposed Causes Address duplication of optional controller for centralized control Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or parts...

Page 238: ...p blinks Applicable Models All models of indoor units Unified ON OFF controller Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes Malfunction of transmission between opti...

Page 239: ...er controller disconnected Set the group No correctly Replace indoor unit PC board Fix the wiring correctly Fix the wiring correctly Connect the connector correctly Replace the central PC board Reset...

Page 240: ...ified ON OFF controller Centralized controller Schedule timer Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes Address duplication of centralized remote controller Impro...

Page 241: ...chedule timer NO YES YES NO NO Fix the wiring correctly Set reset switch to normal NO NO YES YES YES Is the power supply turned on for all optional controllers for centralized control Reset power supp...

Page 242: ...ultaneously Arrange so that the connector for setting master control is connected to one controller for centralized control and reset the power supply for all optional controllers for centralized cont...

Page 243: ...ransmission wiring Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred V2844 Is the switch for setting each address set corr...

Page 244: ...while connector or relay connector is disconnected Check No 9 1 Turn off the power supply 2 Measure the resistance between Vcc and each phase of U V W and GND and each phase at the motor side connect...

Page 245: ...the service mode setting enables not to judge the position detection signal malfunction but to output waveform only during inverter operation The waveform can be checked by disconnecting the wiring of...

Page 246: ...e Replacement Procedure Replacement Procedure Replacement Procedure for INV Compressor for INV Compressor for INV Compressor for INV Compressor VRV II REYQ8M to 48M VRV II REYQ8M to 48M VRV II REYQ8M...

Page 247: ...compressor 8 Remove the rubber caps put on the suction and discharge pipe of the new compressor to release the sealing nitrogen gas Take note that oil may spout due to the pipe inside pressure if the...

Page 248: ...door Unit 259 3 2 Indoor Side 260 4 Option List 265 4 1 Option List of Controllers 265 4 2 Option Lists Outdoor Unit 267 5 Piping Installation Point 268 5 1 Piping Installation Point 268 5 2 The Examp...

Page 249: ...Piping Diagrams Si39 306 238 Appendix 1 Piping Diagrams 1 1 Outdoor Unit REYQ8MY1B REYQ10MY1B REYQ12MY1B 4D042069A...

Page 250: ...Si39 306 Piping Diagrams Appendix 239 REYQ14MY1B REYQ16MY1B 4D042070A...

Page 251: ...line temperature R3T Thermistor for gas line temperature DU220 602D Heat exchanger Gas piping connection port Liquid piping connection port Flare connection Flare connection 15 9 or less Attached pip...

Page 252: ...Si39 306 Piping Diagrams Appendix 241 1 3 BS Unit BSVQ100MV1 BSVQ160MV1 BSVQ250MV1 4D042115...

Page 253: ...Wiring Diagrams for Reference Si39 306 242 Appendix 2 Wiring Diagrams for Reference 2 1 Outdoor Unit REYQ8MY1B REYQ10MY1B REYQ12MY1B 3D038581...

Page 254: ...Si39 306 Wiring Diagrams for Reference Appendix 243 REYQ14MY1B REYQ16MY1B 3D038572...

Page 255: ...Wiring Diagrams for Reference Si39 306 244 Appendix 2 2 Field Wiring REYQ8 10 12 14 16MY1B 3D043435...

Page 256: ...Si39 306 Wiring Diagrams for Reference Appendix 245 REYQ18 20 22 24 26 28 30 32MY1B 3D043436...

Page 257: ...Wiring Diagrams for Reference Si39 306 246 Appendix REYQ34 36 38 40 42 44 46 48MY1B 3D043437...

Page 258: ...Si39 306 Wiring Diagrams for Reference Appendix 247 2 3 Indoor Unit FXCQ20M 25M 32M 63MVE 3D039556A...

Page 259: ...Wiring Diagrams for Reference Si39 306 248 Appendix FXCQ40M 50M 80M 125MVE 3D039557A...

Page 260: ...Si39 306 Wiring Diagrams for Reference Appendix 249 FXZQ20M 25M 32M 40M 50MVE 3D038359...

Page 261: ...Wiring Diagrams for Reference Si39 306 250 Appendix FXFQ25M 32M 40M 50M 63M 80M 100M 125MVE 3D039600...

Page 262: ...Si39 306 Wiring Diagrams for Reference Appendix 251 FXKQ25M 32M 40M 63MVE 3D039564A...

Page 263: ...Wiring Diagrams for Reference Si39 306 252 Appendix FXSQ20M 25M 32M 40M 50M 63M 80M 100M 125MVE 3D039561A...

Page 264: ...Si39 306 Wiring Diagrams for Reference Appendix 253 FXMQ40M 50M 63M 80M 100M 125MVE 3D039620A...

Page 265: ...Wiring Diagrams for Reference Si39 306 254 Appendix FXMQ200M 250MVE 3D039621A...

Page 266: ...Si39 306 Wiring Diagrams for Reference Appendix 255 FXHQ32M 63M 100MVE 3D039801C...

Page 267: ...Wiring Diagrams for Reference Si39 306 256 Appendix FXAQ20M 25M 32MVE 40M 50M 63MVE 3D034206A...

Page 268: ...Si39 306 Wiring Diagrams for Reference Appendix 257 FXLQ20M 25M 32M 40M 50M 63MVE FXNQ20M 25M 32M 40M 50M 63MVE 3D039826A...

Page 269: ...Wiring Diagrams for Reference Si39 306 258 Appendix 2 4 BS Unit BSVQ100MV1 BSVQ160MV1 BSVQ250MV1 3D039903...

Page 270: ...EV1620DQ2 Solenoid valve Receiver gas charge SVL Y3S TEV1620DQ2 Solenoid valve Receiver gas discharge SVG Y4S TEV1620DQ2 Solenoid valve Discharge gas pipe closing SVR Y5S BPV1706 Solenoid valve Non op...

Page 271: ...changer R2T ST8602A 5 6 L1000 20k 25 C Others Float Switch S1L FS 0211B Fuse F1U 250V 5A 5 2 Thermal Fuse TFu Transformer T1R Parts Name Symbol Model Remark FXCQ 20MVE FXCQ 25MVE FXCQ 32MVE FXCQ 40MVE...

Page 272: ...r Heat Exchanger R2T ST8602A 3 6 L630 20k 25 C Others Float Switch S1L FS 0211 Fuse F1U 250V 5A 5 2 Transformer T1R TR22H21R8 Parts Name Symbol Model Remark FXKQ 25MVE FXKQ 32MVE FXKQ 40MVE FXKQ 63MVE...

Page 273: ...1250 20k 25 C Others Float Switch S1L FS 0211B Fuse F1U 250V 5A 5 2 Transformer T1R TR22H21R8 Parts Name Symbol Model Remark FXMQ 40MVE FXMQ 50MVE FXMQ 63MVE FXMQ 80MVE FXMQ 100MVE FXMQ 125MVE FXMQ 20...

Page 274: ...50 20k 25 C Thermistor Heat Exchanger R2T ST8602A 6 6 L 1250 20k 25 C ST8602A 6 6 L 1250 20k 25 C Others Fuse F1U 250V 5A 5 2 Transformer T1R TR22H21R8 Parts Name Symbol Model Remark FXAQ 20MVE FXAQ 2...

Page 275: ...8 L2500 20k 25 C Thermistor for Heat Exchanger R2T ST8602A 9 6 L2500 20k 25 C Others Fuse F1U AC250V 5A Transformer T1R TR22H21R8 Parts Name Symbol Model Remark FXNQ 20MVE FXNQ 25MVE FXNQ 32MVE FXNQ...

Page 276: ...104A61 No Part name Model No Function 1 Adaptor for wiring KRP1B61 KRP1B57 KRP1B59 KRP1B3 PC board when equipped with auxiliary electric heater in the indoor unit 2 DIII NET Expander Adaptor DTA109A51...

Page 277: ...y DMS502A51 to provide 3 more DIII NET communication ports Not usable independently 3 2 Optional Di board DAM412A1 Expansion kit installed on the BACnet Gateway DMS502A51 to provide 16 more wattmeter...

Page 278: ...73T Outdoor unit multi connection piping kit BHFP26M90 Pipe size reducer KHRP25M72TP KHRP25M72HP KHRP25M73TP KHRP26M73HP BHFP22M90P Kit of air discharge duct KPF26B280 2 KPF26B280 KPF26B450 KPF26B450...

Page 279: ...or go up to an outdoor unit and to make a slope V3036 When the piping length between the multi connection kits or between multi connection kit and outdoor unit is 2m or more prepare a vertical project...

Page 280: ...door Unit Actual piping length 40m or less Allowable Level Difference Outdoor Unit Outdoor Unit 5m or less Outdoor Unit Indoor Unit 50m or less when an outdoor unit is lower than indoor units 40m or l...

Page 281: ...rther branches cannot be included in the system below the REFNET header branch Notes When the capacity ratio of the indoor system to the outdoor unit is more than 100 and when all the indoor units are...

Page 282: ...under the indoor unit the level difference is a maximum of 40m V1924 H3 H4 a Outdoor Unit 1 Outdoor Unit 2 Outdoor Unit 3 First Outdoor Branch First Branch c Indoor Units Indoor Units BS Units BS Uni...

Page 283: ...REFNET Pipe System Si39 306 272 Appendix...

Page 284: ...Si39 306 Appendix 273 DPSOH RI RQQHFWLRQ 5 7 SH 5 4 0 HDW 5HFRYHU...

Page 285: ...Si39 306 274 Appendix...

Page 286: ...1 43 9 42 9 24 18 26 6 6 90 17 87 79 44 9 06 8 88 20 24 3 5 85 49 83 25 45 8 71 8 54 22 22 2 4 81 08 78 97 46 8 37 8 21 24 20 3 3 76 93 74 94 47 8 05 7 90 26 18 5 2 73 01 71 14 48 7 75 7 60 28 17 0 1...

Page 287: ...33 14 71 33 92 33 35 121 7 26 7 16 22 228 05 223 08 72 32 78 32 23 122 7 06 6 97 23 218 24 213 51 73 31 69 31 15 123 6 87 6 78 24 208 90 204 39 74 30 63 30 12 124 6 69 6 59 25 200 00 195 71 75 29 61 2...

Page 288: ...Low Pressure PL PH Detected Pressure High Side MPa PL Detected Pressure Low Side MPa VH Output Voltage High Side VDC VL Output Voltage Low Side VDC PH 1 38V 0 69 PL 0 57V 0 28 PH High pressure MPa VL...

Page 289: ...acing the Inverter s Power Transistors and Diode Modules Decision according to continuity check by analog tester Before checking disconnect the electric wiring connected to the power transistor and di...

Page 290: ...rter PC Board Decision If other than given above the power unit is defective and must be replaced Notes If using a digital tester and continuity may be reversed Diode Module Decision If other than giv...

Page 291: ...Method of Replacing The Inverter s Power Transistors and Diode Modules Si39 306 280 Appendix...

Page 292: ...ns for New Precautions for New Precautions for New Precautions for New Refrigerant R410 Refrigerant R410 Refrigerant R410 Refrigerant R410 1 Precautions for New Refrigerant R410 282 1 1 Outline 282 1...

Page 293: ...mixture refrigerant mixture of two or more refrigerants having similar boiling points 3 The design pressure is different at each product Please refer to the installation manual for each product Refere...

Page 294: ...New Refrigerant R410 283 Thermodynamic characteristic of R410A Temperature Steam pressure kPa Liquid Vapor Density kg m3 Liquid Vapor Specific heat at constant pressure kJ kgK Liquid Vapor Specific en...

Page 295: ...d in high pressure vessels Although those vessels are durable and strong careless handling can cause damage that can lead to unexpected accidents Do not drop vessels let them fall apply impact or roll...

Page 296: ...same tools for R22 and R410A 2Thread specification differs for R410A and R407C Charging cylinder 2Weighting instrument used for HFCs Gas detector 2The same tool can be used for HFCs Vacuum pump pump...

Page 297: ...pipe extension margin of 0 to 0 5mm was provided for flaring For R410A air conditioners perform pipe flaring with a pipe extension margin of 1 0 to 1 5mm For clutch type only Conventional tool with pi...

Page 298: ...heck valve Specifications 2 Discharge speed z Maximum degree of vacuum 50 l min 50Hz 100 7 kPa 5 torr 755 mmHg 60 l min 60Hz 2 Suction port UNF7 16 20 1 4 Flare UNF1 2 20 5 16 Flare with adapter Diffe...

Page 299: ...en 5 Refrigerant oil Air compal Specifications 2 Contains synthetic oil therefore it can be used for piping work of every refrigerant cycle 2 Offers high rust resistance and stability over long period...

Page 300: ...ith and without hand operate valve that prevents refrigerant from outflow Differences 2 Pressure proof hose 2 Change in service port diameter 2 Use of nylon coated material for HFC resistance 8 Chargi...

Page 301: ...iquid refrigerant charging 2 A manifold with separate ports for HFCs and previous refrigerants is equipped as standard accessories Differences 2 Measurement is based on weight to prevent change of mix...

Page 302: ...Units in the Same System 206 UA Excessive Number of Indoor Units 208 UC Address Duplication of Centralized Remote Controller 209 UE Malfunction of Transmission between Centralized Remote Controller a...

Page 303: ...PCB 146 Malfunction of Capacity Determination Device 158 Malfunction of Discharge Pipe Pressure Sensor 184 Malfunction of Drain Level Control System S1L 150 Malfunction of Inverter Radiating Fin Temp...

Page 304: ...285 Setting by dip switches 113 Setting by pushbutton switches 113 Setting Contents and Code No 104 Setting mode 1 115 Setting mode 2 116 Setting of Refrigerant Additional Charging Operation 129 Speci...

Page 305: ...Si39 306 iv Index...

Page 306: ...0 UF Refrigerant System not Set Incompatible Wiring Piping 212 UH Malfunction of System Refrigerant System Address Undefined 213 A Abnormal Discharge Pipe Temperature 172 Actuation of High Pressure Sw...

Page 307: ...sistors and Diode Modules 278 Diode Module 279 Power Transistor IGBT On Inverter PC Board 279 O Operation Lamp Blinks 227 Outdoor Unit PC Board Layout 100 P PC Board Defect 149 163 222 Piping Diagrams...

Page 308: ...vii W Weigher for refrigerant charge 290 Wired Remote Controller 101 Wireless Remote Controller Indoor Unit BRC7C type 102 Wiring Diagrams for Reference 242 BS Unit 258 Field Wiring 244 Indoor Unit 24...

Page 309: ...n Tokyo office Shinjuku Sumitomo Bldg 6 1 Nishi Shinjuku 2 chome Shinjuku ku Tokyo 163 0235 Japan Zandvoordestraat 300 B 8400 Oostende Belgium l For further improvement specifications or designs are s...

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