Daikin Aurora Series Service Manual Download

Page: 297 / 333

SiUS341802E

Check

Service Diagnosis

284

3.2

Low Pressure Check

Referring to the Fault Tree Analysis (FTA) shown below, probe the defective points.

Notes:

∗

1: For details of compressor capacity control while in cooling, refer to Compressor PI control.

∗

2: The low pressure protection control includes low pressure protection control and hot gas bypass

control.

∗

3: In cooling, the indoor unit electronic expansion valve is used for superheated degree control.

∗

4: In heating, the outdoor unit electronic expansion valve is used for superheated degree control of

outdoor unit heat exchanger.

CHECK 2

Abnormally dropin

low pressure

(Low evaporating

temperature)

[In cooling]

(

∗

1.)

Defective
low pressure
control

Defective
compressor
capacity
control

Defective low pressure

sensor

Defective main PCB

Defective
low pressure
protection
control

Defective low pressure
sensor

Defective hot gas
solenoid valve

Defective main PCB

[In both cooling
and heating]
(

∗

2.)

[In cooling]
If the indoor unit
electronic
expansion valve is
throttled too much:
(

∗

3.)

Defective indoor
unit electronic
expansion valve

Defective valve coil

Defective valve body

Defective
control

Defective gas pipe
thermistor of indoor unit

Defective liquid pipe
thermistor of indoor unit

Defective main PCB

Defective outdoor
unit electronic
expansion valve

Defective valve coil

Defective valve body

[In heating]
If the outdoor unit
electronic
expansion valve
excessively
throttled:
(

∗

4.)

Defective
control

Defective low pressure
sensor
Defective suction pipe
thermistor

Defective main PCB

[In cooling]

Low suction air
temperature of
the evaporator

[In heating]

Low suction air
temperature of
indoor unit

Short circuit

Low room temperature

Defective suction air thermistor of indoor unit

Low suction air temperature of outdoor unit

Defective outdoor air temperature thermistor of outdoor unit

High pipe
resistance

Abnormal piping length

Bent or crashed pipe

Clogging of foreign materials

Stop valve closed

Less
circulation
quantity of
refrigerant

Degradation
in evaporating
capacity

Refrigerant shortage

Moisture choke

Dirty

evaporator

Decreased
airflow rate

Decreased
fan output

Defective fan motor

←

Can the fan motor be rotated with hands?

Are the motor coil resistance and insulation normal?

←

If a spare PCB is installed, is the

capacity setting properly made?

←

Is the air filter clogged?

←

Is there any obstacle in the airflow passage?

Defective main PCB
(Including capacity setting)

High
airflow
passage
resistance

Dirty filter

Obstacle

Defective electronic
expansion valve
control

←

Is the pressure value checked with the Service Checker

corresponding to the measurement value of the pressure sensor?

←

Are the voltage characteristics normal?

←

Is the pressure value checked with the Service Checker

corresponding to the measurement value of the pressure sensor?

←

Are the coil resistance and insulation normal?

←

Are the voltage characteristics normal?

←

Are the coil resistance and insulation normal?

←

Check for the thermistor resistance and connection.

←

Check for the thermistor resistance and connection.

←

Are the voltage characteristics normal?

←

Are the coil resistance and insulation normal?

←

Is the pressure value checked with the Service Checker
corresponding to the measurement value of the pressure sensor?

←

Check for the thermistor resistance and connection.

←

Is the suction air temperature less than 14˚C (57.2˚F)?

←

Is the room temperature less than 14˚C (57.2˚F)?

←

Is the connector properly connected?

Are the thermistor resistance characteristics normal?

←

Is the outdoor air temperature less than –20˚C (–4˚F)?

←

Is the connector properly connected?

Are the thermistor resistance characteristics normal?

←

Does the piping length fall in the permissible range?

←

Conduct visual checks for pipe conditions.

←

Is there any temperature difference caused before and

after the filter or branch pipe?

←

Refer to the

CHECK 7

←

Eliminate moisture by vacuum operation. (Refer to

CHECK 8

)

←

Is the heat exchanger clogged?

Summary of Contents for Aurora Series

Page 1: ...Service Manual SiUS341802E Heat Pump 60 Hz Aurora Series RXLQ72 240TATJU RXLQ72 240TAYDU RXLQ72 240TAYCU RXYQ72 384TAYCU ...

Page 2: ... 5 2 3 Air Treatment Equipment 6 3 Combination of Outdoor Units 7 3 1 RXLQ TATJU RXLQ TAYDU RXLQ TAYCU 7 3 2 RXYQ TAYCU 7 4 Capacity Range 8 4 1 Combination Ratio 8 4 2 Outdoor Unit Combinations 9 Part 2 Refrigerant Circuit 10 1 Refrigerant Circuit 11 1 1 Outdoor Unit 11 1 2 Indoor Unit 14 1 3 Outdoor Air Processing Unit 16 2 Functional Parts Layout 17 2 1 RXLQ72TATJU RXLQ72TAYDU RXLQ72TAYCU RXYQ7...

Page 3: ...or 43 2 2 When System is in Stop Mode 43 2 3 Slave Unit Stops during Master Unit Operation 43 3 Standby Control 44 3 1 Restart Standby 44 3 2 Crankcase Heater Control 44 4 Startup Control 45 4 1 Startup Control in Cooling 45 4 2 Startup Control in Heating 46 5 Basic Control 47 5 1 Normal Operation 47 5 2 Compressor PI Control 48 5 3 Operating Priority and Rotation of Compressors 49 5 4 Compressor ...

Page 4: ...9 14 Fan Control Heater Residual FXTQ TA Models 89 9 15 Interlocked with External Equipment FXTQ TA Models 89 Part 5 Field Settings and Test Operation 91 1 Field Settings from Remote Controller 92 1 1 Wired Remote Controller 92 1 2 Wireless Remote Controller 94 1 3 Simplified Remote Controller 95 1 4 List of Field Settings for Indoor Unit 96 1 5 Details of Field Settings for Indoor Unit 99 1 6 Lis...

Page 5: ...ity Dust Clogging 187 2 14 Drain Level above Limit 188 2 15 Capacity Determination Device Abnormality 189 2 16 Transmission Abnormality between Indoor Unit PCB and Fan PCB 190 2 17 Blower Motor Communication Error 192 2 18 Thermistor Abnormality 193 2 19 Combination Error between Indoor Unit PCB and Fan PCB 194 2 20 Blower Motor HP Mismatch 195 2 21 Indoor Blower Does Not Have Required Parameters ...

Page 6: ...ality 252 2 56 Refrigerant Shortage 253 2 57 Reverse Phase Open Phase 254 2 58 Power Supply Insufficient or Instantaneous Abnormality 256 2 59 Check Operation not Executed 258 2 60 Transmission Error between Indoor Units and Outdoor Units 259 2 61 Transmission Error between Remote Controller and Indoor Unit 262 2 62 Transmission Error between Outdoor Units 263 2 63 Transmission Error between Main ...

Page 7: ... of the Relay Wires 298 3 11 Fan Motor Connector Check Power Supply Cable 299 3 12 Fan Motor Connector Check Signal Cable 299 3 13 Electronic Expansion Valve Coil Check 300 Part 7 Appendix 302 1 Wiring Diagrams 303 1 1 Outdoor Unit 303 1 2 Indoor Unit 308 1 3 Air Treatment Equipment 316 ...

Page 8: ...on is shown in the illustration or near the symbol 1 1 Warnings and Cautions Regarding Safety of Workers This manual is for the person in charge of maintenance and inspection Warning Do not store the equipment in a room with fire sources e g naked flames gas appliances electric heaters Be sure to disconnect the power cable from the socket before disassembling equipment for repair Working on equipm...

Page 9: ... exclusive use with R 32 and R 410A refrigerant The use of materials for R 22 refrigerant models may cause a serious accident such as damage to the refrigerant cycle or equipment failure Do not mix air or gas other than the specified refrigerant R 32 R 410A R 22 in the refrigerant system If air enters the refrigerating system excessively high pressure results causing equipment damage and injury Wa...

Page 10: ...riate tools to conduct repair work Never attempt to modify the equipment The use of inappropriate parts or tools may cause an electrical shock excessive heat generation or fire If the power cable and lead wires are scratched or have deteriorated be sure to replace them Damaged cable and wires may cause an electrical shock excessive heat generation or fire Do not use a joined power cable or extensi...

Page 11: ... the refrigerant gas leaks be sure to locate the leakage and repair it before charging the refrigerant After charging the refrigerant make sure that there is no leakage If the leakage cannot be located and the repair work must be stopped be sure to pump down and close the service valve to prevent refrigerant gas from leaking into the room Refrigerant gas itself is harmless but it may generate toxi...

Page 12: ...at generation fire or an electrical shock If the installation platform or frame has corroded replace it A corroded installation platform or frame may cause the unit to fall resulting in injury Check the earth grounding and repair it if the equipment is not properly earthed grounded Improper earth grounding may cause an electrical shock Be sure to measure insulation resistance after the repair and ...

Page 13: ...ution is used when there is danger that the reader through incorrect manipulation may damage equipment lose data get an unexpected result or has to restart part of a procedure Note Note A Note provides information that is not indispensable but may nevertheless be valuable to the reader such as tips and tricks Reference A Reference guides the reader to other places in this binder or in this manual ...

Page 14: ... Outdoor Unit 2 1 3 Air Treatment Equipment 3 2 External Appearance 4 2 1 Indoor Unit 4 2 2 Outdoor Unit 5 2 3 Air Treatment Equipment 6 3 Combination of Outdoor Units 7 3 1 RXLQ TATJU RXLQ TAYDU RXLQ TAYCU 7 3 2 RXYQ TAYCU 7 4 Capacity Range 8 4 1 Combination Ratio 8 4 2 Outdoor Unit Combinations 9 ...

Page 15: ... FXDQ 07M 09M 12M 18M 24M Ceiling Mounted Duct Type Middle and High Static Pressure FXSQ 05TA 07TA 09TA 12TA 15TA 18TA 24TA 30TA 36TA 48TA 54TA FXMQ 07PB 09PB 12PB 15PB 18PB 24PB 30PB 36PB 48PB 54PB Ceiling Mounted Duct Type FXMQ 72M 96M Ceiling Suspended Type FXHQ 12M 24M 36M Wall Mounted Type FXAQ 07P 09P 12P 18P 24P Floor Standing Type FXLQ 07M 09M 12M 18M 24M VJU Concealed Floor Standing Type ...

Page 16: ...Q120TAYDU Model name RXLQ72TAYCU RXLQ96TAYCU RXLQ120TAYCU Outdoor unit 1 RXLQ72TAYCU RXLQ96TAYCU RXLQ120TAYCU Model name RXLQ144TAYCU RXLQ192TAYCU RXLQ240TAYCU Outdoor unit 1 RXLQ72TAYCU RXLQ96TAYCU RXLQ120TAYCU Outdoor unit 2 RXLQ72TAYCU RXLQ96TAYCU RXLQ120TAYCU Model name RXYQ72TAYCU RXYQ96TAYCU RXYQ120TAYCU RXYQ144TAYCU RXYQ168TAYCU Outdoor unit 1 RXYQ72TAYCU RXYQ96TAYCU RXYQ120TAYCU RXYQ144TAY...

Page 17: ... BYCP125K W1 Ceiling mounted duct type FXMQ M 4 way ceiling mounted cassette 2 2 type FXZQ TA Shown with BYFQ60C3W1W Ceiling suspended type FXHQ M 4 way ceiling mounted cassette 2 2 type FXZQ M Shown with BYFQ60B8W1U Wall mounted type FXAQ P 4 way blow ceiling suspended type FXUQ P Floor standing type FXLQ M One way blow cassette type FXEQ P Concealed floor standing type FXNQ M Slim ceiling mounte...

Page 18: ... Unit Single Outdoor Unit Double Outdoor Unit Triple Outdoor Unit RXLQ72 96 120TATJU RXLQ72 96 120TAYDU RXLQ72 96 120TAYCU RXYQ72 96 120 144 168TAYCU RXLQ144 192 240TATJU RXLQ144 192 240TAYDU RXLQ144 192 240TAYCU RXYQ192 216 240 264 288 312 336TAYCU RXYQ360 384TAYCU ...

Page 19: ...SiUS341802E External Appearance General Information 6 2 3 Air Treatment Equipment Outdoor air processing unit FXMQ MF Energy recovery ventilator VAM series VAM G ...

Page 20: ...ity Number of units Module Outdoor Unit Multi Connection Piping Kit 1 Ton HP kW 72 96 120 6 7 5 21 1 1 O 8 10 28 1 1 O 10 12 5 35 2 1 O 12 15 42 2 2 OO BHFP22P100U 16 20 56 3 2 OO 20 25 70 3 2 OO System capacity Number of units Module Outdoor Unit Multi Connection Piping Kit 1 Ton HP kW 72 96 120 144 168 6 7 5 21 1 1 O 8 10 28 1 1 O 10 12 5 35 2 1 O 12 15 42 2 1 O 14 17 5 49 2 1 O 16 20 56 3 2 OO ...

Page 21: ...t not exceed 30 of the capacity index of the outdoor units And the connection ratio must not exceed 100 4 It is permitted to use a maximum connection ratio of 130 in some circumstances please contact your local Daikin representative for further details Combination ratio Total capacity index of the indoor units Capacity index of the outdoor units Type Min combination ratio Max combination ratio Typ...

Page 22: ...TAYDU 192TAYCU 240TATJU 240TAYDU 240TAYCU Max Number of Connectable Indoor Units 12 16 20 25 33 41 Total Capacity Index of Indoor Units to be Connected 1 51 93 144 68 124 192 84 156 240 101 187 230 135 249 307 168 312 384 Capacity Range ton 6 8 10 12 14 16 18 RXYQ 72TAYCU 96TAYCU 120TAYCU 144TAYCU 168TAYCU 192TAYCU 216TAYCU Max Number of Connectable Indoor Units 12 16 20 25 29 33 37 Total Capacity...

Page 23: ...ssing Unit 16 2 Functional Parts Layout 17 2 1 RXLQ72TATJU RXLQ72TAYDU RXLQ72TAYCU RXYQ72 120TAYCU 17 2 2 RXLQ96 120TATJU RXLQ96 120TAYDU RXLQ96 120TAYCU RXYQ144 168TAYCU 20 3 Refrigerant Flow for Each Operation Mode 22 3 1 Cooling Operation 22 3 2 Heating Operation 23 3 3 Cooling Oil Return Operation 24 3 4 Defrost Heating Oil Return Operation 25 ...

Page 24: ...m the accumulator to the compressor 17 S1NPH High pressure sensor Used to detect the high pressure 18 S1NPL Low pressure sensor Used to detect the low pressure 19 S1PH High pressure switch For inverter compressor This functions when pressure increases to stop operation and avoid high pressure increase in the fault operation 20 Pressure regulating valve Liquid pipe This is used when pressure increa...

Page 25: ...72TAYCU RXYQ72 120TAYCU C 3D112615 29 R7T 38 R16T 30 R8T 26 R4T 25 R3T 37 R15T 27 R5T 31 R9T 33 R11T 11 Y2S 23 R1T 4 Y2E 9 Y7E 12 Y3S Y6E 8 20 15 Y6S 17 6 Y4E 16 Y7S 10 Y1S 22 14 Y5S 2 M1F M2F 3 Y1E 5 Y3E 7 Y5E 21 28 R6T 36 R14T 34 R12T 24 R21T 1 M1C 19 35 R13T 32 R10T 18 13 Y4S S1PH ...

Page 26: ...LQ96 120TAYCU RXYQ144 168TAYCU C 3D112616 29 R7T 38 R16T 30 R8T 26 R4T 25 R3T 37 R15T 27 R5T 31 R9T 33 R11T 11 Y2S 23 R1T 4 Y2E 9 Y7E 12 Y3S Y6E 8 20 15 Y6S 17 6 Y4E 16 Y7S 10 Y1S 22 14 Y5S 2 M1F M2F 3 Y1E 5 Y3E 7 Y5E 21 28 R6T 36 R14T 34 R12T 24 R21T 1 M1C 19 35 R13T 32 R10T 18 13 Y4S S1PH ...

Page 27: ...gree control while in cooling or subcooled degree control while in heating 4 Gas pipe thermistor R3T R3T R3T Used for gas superheated degree control while in cooling 5 Discharge air thermistor R4T Used for discharge air temperature control FXFQ T FXFQ P FXHQ M FXZQ TA FXZQ M FXUQ P FXEQ P FXSQ TA FXMQ M FXAQ P FXLQ M FXNQ M C 4D024460P 4 3 Indoor heat exchanger Fan Filter Filter 1 Gas piping conne...

Page 28: ...MQ PB FXTQ TA Fan Indoor heat exchanger Filter Filter Liquid piping connection port Gas piping connection port 3 4 2 1 C 4D043864N Indoor heat exchanger Fan Filter Filter 4 2 1 3 Gas piping connection port Liquid piping connection port C 4D034245R 5 C 4D068194 4 1 3 ...

Page 29: ...to reduce pressure from high to low in bypassing hot gas 4 R1T Suction air thermistor Used to turn ON or OFF the thermostat 5 R2T Liquid pipe thermistor Used to control the opening degree of electronic expansion valve under the SC control 2 6 R3T Gas pipe thermistor Used to control the opening degree of electronic expansion valve under the SH control 7 R4T Discharge air thermistor Used to control ...

Page 30: ... Solenoid valve OS oil return Y1S Solenoid valve Hot gas bypass Y2S Solenoid valve Liquid shutoff Y3S High pressure sensor S1NPH Section W W Thermistor Heat exchanger gas lower R9T Thermistor Suction R10T Inverter fan M2F Low pressure sensor S1NPL Thermistor Outdoor air R1T Four way valve HP LP gas Y4S High pressure switch For inverter compressor S1PH Electronic expansion valve Heat exchanger uppe...

Page 31: ...er gas purge Y7E Thermistor Leak detection R15T Electronic expansion valve Leak detection Y6E Thermistor Heat exchanger liquid upper R4T Thermistor Heat exchanger liquid lower R5T Thermistor Subcooling gas R6T Part B detail Electronic expansion valve Subcooling injection Y4E Thermistor Subcooling liquid R7T Thermistor Receiver inlet R3T Thermistor Subcooling injection R16T FROM R11T ...

Page 32: ...t SiUS341802E 19 Refrigerant Circuit Back View of Electrical Box Refer to the illustration below for the location of the reactor thermistor R71T R72T for RXLQ72TATJU 1P476849D Reactor thermistor R72T Reactor thermistor R71T ...

Page 33: ...lenoid valve Hot gas bypass Y2S Solenoid valve Liquid shutoff Y3S High pressure sensor S1NPH Section W W Thermistor Heat exchanger gas lower R9T Thermistor Suction R10T Inverter fan M2F Thermistor Outdoor air R1T Four way valve HP LP gas Y4S High pressure switch For inverter compressor S1PH Electronic expansion valve Heat exchanger upper Y1E Thermistor Deicer R11T Part A Electronic expansion valve...

Page 34: ...er gas purge Y7E Thermistor Leak detection R15T Electronic expansion valve Leak detection Y6E Thermistor Heat exchanger liquid upper R4T Thermistor Heat exchanger liquid lower R5T Thermistor Subcooling gas R6T Part B detail Electronic expansion valve Subcooling injection Y4E Thermistor Subcooling liquid R7T Thermistor Receiver inlet R3T Thermistor Subcooling injection R16T FROM R11T ...

Page 35: ...g Operation High temperature high pressure gas High temperature high pressure liquid Low temperature low pressure gas Low temperature low pressure liquid OFF Fan OFF Cooling Unit Thermostat OFF Cooling Unit ON Fan ON Indoor Unit Thermostat ON Cooling Unit ON Fan ON Indoor unit Operation C 3D112615 C 3D112616 Liquid pipe Gas pipe ...

Page 36: ...igh pressure gas High temperature high pressure liquid Low temperature low pressure gas Low temperature low pressure liquid Indoor Unit Thermostat OFF OFF Fan OFF Heating Unit Heating Unit ON 192 pulse 0 pulse Fan LL Thermostat ON Heating Unit ON Fan ON Indoor unit Operation Liquid pipe Gas pipe C 3D112615 C 3D112616 ...

Page 37: ...erature high pressure gas High temperature high pressure liquid Low temperature low pressure gas Low temperature low pressure liquid C 3D112615 C 3D112616 Liquid pipe Gas pipe Indoor Unit Thermostat OFF OFF 192 pulse Fan OFF Cooling Unit Cooling Unit ON Fan ON Thermostat ON Cooling Unit ON Fan ON Indoor unit Operation ...

Page 38: ...igh pressure gas High temperature high pressure liquid Low temperature low pressure gas Low temperature low pressure liquid C 3D112615 C 3D112616 Liquid pipe Gas pipe Indoor Unit Indoor Unit Indoor Unit Thermostat OFF OFF Fan OFF Heating Unit Heating Unit ON 224 pulse Fan OFF Thermostat ON Heating Unit ON Fan OFF Indoor unit Operation ...

Page 39: ...nd Functions 28 2 1 BRC1E73 28 2 2 Wireless Remote Controller 31 3 Main Sub Setting 32 3 1 BRC1E73 32 3 2 Wireless Remote Controller 33 4 Centralized Control Group No Setting 34 4 1 BRC1E73 34 4 2 Wireless Remote Controller 36 4 3 Group No Setting Example 37 5 Service Mode 38 5 1 BRC1E73 38 ...

Page 40: ...ller Wireless remote controller Navigation FXFQ T BRC1E73 FXFQ P FXZQ TA BRC082A42W for BYFQ60C3W1W BRC082A42S for BYFQ60C3W1S BRC082A41W for BYFQ60B3W1 FXZQ M BRC7E830 FXUQ P FXEQ P FXDQ M BRC4C82 FXSQ TA BRC082A43 FXMQ PB BRC4C82 FXMQ M FXHQ M BRC7E83 FXAQ P BRC7E818 FXLQ M FXNQ M FXTQ TA BRC4C82 ...

Page 41: ...to press the buttons on the remote controller damage may result 1 Operation mode selector button Press this button to select the operation mode of your preference Available modes vary with the indoor unit model 2 Fan speed control button Press this button to select the fan speed of your preference Available fan speeds vary with the indoor unit model 3 Menu OK button Used to enter the main menu Use...

Page 42: ...ighlight the next items on the right hand side Each screen is scrolled in the right hand direction 7 Left button W Used to highlight the next items on the left hand side Each screen is scrolled in the left hand direction 8 On Off button Press this button and system will start Press this button again to stop the system 9 Operation lamp This lamp illuminates solid green during normal operation This ...

Page 43: ...mode changeover Fan speed control Menu display Confirmation of each setting On Off Cancel Operation lamp Press the Cancel button for 4 seconds or more Press the Cancel button once Press the Cancel button for 4 seconds or more Press the Cancel button once Maintenance Menu Model Name Operation Hours Indoor Unit Status Outdoor Unit Status Forced Defrost Error Display Swap Unit No Addressed Sensor Val...

Page 44: ...t fan speed When the INSPECTION TEST button is pressed the display shows the system mode is in 13 14 15 16 17 TIMER RESERVE CANCEL BUTTON AIR FLOW DIRECTION ADJUST BUTTON OPERATION MODE SELECTOR BUTTON FILTER SIGN RESET BUTTON INSPECTION TEST BUTTON Press this button to select operation mode This button is used only by qualified service persons for maintenance purposes 11 12 Use this button for pr...

Page 45: ...e controller from Main to Sub proceed as follows The designation of the main and sub remote controllers can be swapped Note that this change requires turning the power OFF and then ON again Service settings menu Item 2 Switch Main Sub Controller Main RC Sub RC Select Switch Main Sub Controller and press Menu OK button Service settings menu is displayed Item 2 is displayed Basic screen is displayed...

Page 46: ...eless Remote Controller The address for the wireless remote controller is factory setting to 1 To change this setting proceed as follows 1 Hold down the button and the button for at least 4 seconds to get the Field setting mode Indicated in the display area in the figure at right 2 Press the button and select a multiple setting A b Each time the button is pressed the display switches between A and...

Page 47: ... once Service settings menu is displayed Item 2 is displayed Item 2 is displayed Item 2 is displayed Basic screen is displayed Press the Cancel button once Select the desired Group Address using the S T Up Down buttons and then press the Menu OK button Item 2 is displayed Select the desired Unit No using the S T Up Down buttons and then select Group Address using the WX buttons 0 1 00 Press and ho...

Page 48: ...operation manual for maintenance Group Address Group Select Group Address and then press the Menu OK button Select Group Address Group and then press the Menu OK button Select the desired Group Address using the S T Up Down buttons and then press the Menu OK button Service settings menu is displayed Item 2 is displayed Item 2 is displayed Item 2 is displayed Basic screen is displayed Press and hol...

Page 49: ...s INSPECTION TEST button for 4 seconds or more to enter field setting mode 2 Set mode No 00 with MODE button 3 Set the group No for each group with UP button or DOWN button 4 Enter the selected group numbers by pressing RESERVE button 5 Press INSPECTION TEST button and return to the normal mode UP button DOWN button MODE button RESERVE button Mode No Field setting mode Group No INSPECTION TEST but...

Page 50: ...for about 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 F2 P1 P2 F1 F2 P1 P2 F1 F2 P1 P2 No Remote Controller 1 03 1 00 1 01 Main Sub 1 02 1 04 Indoor Outdoor Outdoor Outdoor Outdoor unit Outdoor unit F1 F2 F1 F2 Indoor Outdoor Outdoor Outdoor Group ...

Page 51: ...ration hours Outdoor compressor 1 operation hours Outdoor compressor 2 operation hours Indoor Unit Status Unit No Select the unit number you want to check FAN Fan tap 1 Speed Fan speed rpm 2 FLAP Airflow direction EV Degree that electronic expansion valve is open pulse MP Drain pump ON OFF EH Electric heater ON OFF Hu Humidifier ON OFF 3 TBF Anti freezing control ON OFF Service settings menu is di...

Page 52: ...egree that electronic expansion valve is open pulse SV1 Solenoid valve ON OFF Th1 Th2 Th3 Th4 Th5 Th6 Forced Defrost Forced defrost ON Enables the forced defrost operation Forced defrost OFF Disables the forced defrost operation Error Display Display Error ON Displays the error on the screen Display Error OFF Displays neither errors nor warnings Display Warning ON Displays a warning on the screen ...

Page 53: ... Expansion Valve PI Control 52 5 6 Step Control of Outdoor Fans 53 6 Protection Control 54 6 1 High Pressure Protection Control 54 6 2 Low Pressure Protection Control 56 6 3 Discharge Pipe Protection Control 57 6 4 Compressor Body Protection Control 58 6 5 Inverter Protection Control 58 7 Special Control 60 7 1 Pump Down Residual Operation 60 7 2 Oil Return Operation 61 7 3 Defrost Operation 63 7 ...

Page 54: ...ntrol In Heating Only 82 9 10 Louver Control for Preventing Ceiling Dirt 83 9 11 Heater Control Except FXTQ TA Models 84 9 12 Heater Control FXTQ TA Models 85 9 13 3 Step Thermostat Processing FXTQ TA Models 88 9 14 Fan Control Heater Residual FXTQ TA Models 89 9 15 Interlocked with External Equipment FXTQ TA Models 89 ...

Page 55: ...rt standby 2 Crankcase heater control Startup control include pressure equalization before startup 1 Startup control in cooling 2 Startup control in heating Basic control 1 Normal Operation 2 Compressor PI control 3 Operation priority and rotation of compressors 4 Compressor step control 5 Electronic expansion valve PI control 6 Step control of outdoor fans Protection control 1 High pressure prote...

Page 56: ... to Error Codes and Descriptions page 151 of the troubleshooting for the items to determine the error 2 2 When System is in Stop Mode The four way valves both for heat exchanger switch and piping switch retain the condition ON when heating operation is stopped 2 3 Slave Unit Stops during Master Unit Operation When slave unit is stopped because of low demand conditions for this unit is set same as ...

Page 57: ...stem In addition the outdoor fan carry out the residual operation for a while to accelerate pressure equalizing and to suppress condensing of the refrigerant in the evaporator 3 2 Crankcase Heater Control In order to prevent the refrigerant from dissolving in the compressor oil in the stopped mode this mode is used to control the crankcase heater Crankcase heater OFF Crankcase heater ON Discharge ...

Page 58: ... position the four way valve 4 1 Startup Control in Cooling DSH Discharge pipe superheated degree Pc High pressure sensor detection value Pe Low pressure sensor detection value Ta Outdoor air temperature Refer to page 53 for Step X 0 Hz 0 pulse 3 000 pulse fully open Step 15 Pc Pe 0 42 MPa 60 9 psi DSH 10 C 18 F Pc Pe 0 32 MPa 46 4 psi 20 rps or more OR Ta 20 C OFF 68 F Ta 20 C StepX 2 68 F Freque...

Page 59: ... Hz 10 rps 10 sec A B C D E 0 pulse Step 4 Step 8 OR PI control Inverter compressor M1C Electronic expansion valve main Y1E Inverter fan M1F M2F Frequency step up 5 sec interval Initial opening Pc Pe 0 42 MPa 60 9 psi DSH 12 C 21 6 F Pc Pe 0 32 MPa 46 4 psi 20 rps or more Pc Pe 0 17 MPa 24 7 psi RXLQ72TA RXYQ72 120TA 19 24 29 38 57 Frequency rps RXLQ96 120TA RXYQ144 168TA 16 4 16 4 18 24 36 A B C ...

Page 60: ...eat exchanger lower Y3E Subcooled degree control 0 pulse in low load Superheated degree control 0 pulse in low load Electronic expansion valve Subcooling heat exchanger Y2E Superheated degree control discharge pipe protection Superheated degree control discharge pipe protection Electric expansion valve Subcooling injection Y4E Compressor injection control Compressor injection control Electronic ex...

Page 61: ...hrenheit F Te Low pressure equivalent saturation temperature TeS Target temperature of Te Varies depending on Te setting operating frequency etc Te set value Make this setting while in Setting mode 2 Te setting L M H A 1 factory setting 3 C 37 4 F 6 C 42 8 F 7 C 44 6 F 8 C 46 4 F 9 C 48 2 F 10 C 50 F 11 C 51 8 F 28 75 Ta C 0 65 C 104 55 Ta F 0 65 F Controls compressor capacity to adjust Tc to achi...

Page 62: ...oor Units Triple Outdoor Units Notes 1 In the case of combination of triple outdoor units the above diagram shows master unit slave unit 1 and slave unit 2 from left to right 2 Compressors may operate in any pattern other than those mentioned above according to the operating status Pattern 1 Pattern 2 Pattern 3 Aurora series RXLQ72 120TA Standard series RXYQ72 168TA M1C No 1 M1C M1C No 1 No 2 No 2...

Page 63: ... 101 3 15 19 0 75 44 6 135 102 7 16 19 4 76 45 2 136 104 2 17 19 8 77 45 8 137 105 6 18 20 1 78 46 5 138 107 1 19 20 5 79 47 1 139 108 4 20 20 7 80 47 8 140 110 1 21 21 0 81 48 5 141 111 7 22 21 3 82 49 1 142 113 2 23 21 6 83 49 8 143 114 8 24 21 9 84 50 5 144 116 4 25 22 2 85 51 1 145 118 0 26 22 5 86 52 0 146 119 7 27 22 9 87 52 7 147 121 4 28 23 2 88 53 4 148 123 1 29 23 5 89 54 2 149 124 8 30 ...

Page 64: ... 23 18 6 83 32 8 143 75 6 24 18 7 84 33 3 144 76 6 25 18 8 85 33 7 145 77 7 26 18 9 86 34 2 146 78 8 27 19 0 87 34 7 147 79 9 28 19 1 88 35 2 148 81 0 29 19 2 89 35 7 149 82 2 30 19 3 90 36 2 150 83 3 31 19 4 91 36 7 151 84 5 32 19 5 92 37 0 152 85 7 33 19 6 93 37 7 153 86 9 34 19 7 94 38 2 154 88 1 35 19 8 95 38 8 155 89 3 36 19 9 96 39 3 156 90 6 37 20 0 97 39 9 157 91 8 38 20 1 98 40 4 158 93 1...

Page 65: ...cooling electronic expansion valve EVT control In order to make the maximum use of the subcooling heat exchanger this function is used to exert PI control on the electronic expansion valve Y2E Y5E or Y3E so that the evaporator side gas pipe superheated degree SH will become constant SC Tc Tf SC Condenser outlet subcooled degree Tc High pressure equivalent saturated temperature Tf Liquid pipe tempe...

Page 66: ...5 375 345 375 26 358 388 358 388 27 372 402 372 402 28 386 416 386 416 29 401 431 401 431 30 417 447 417 447 31 434 464 434 464 32 451 481 451 481 33 470 500 470 500 34 489 519 489 519 35 509 539 509 539 36 531 561 531 561 37 553 583 553 583 38 577 607 577 607 39 601 631 601 631 40 627 657 627 657 41 655 685 655 685 42 683 713 683 713 43 713 743 713 743 44 745 775 745 775 45 778 808 778 808 46 813...

Page 67: ...ep down 1 step up 2 step down After 10 seconds After 15 seconds After 15 seconds After 10 seconds Pc 3 57 MPa 518 psi Pc 3 70 MPa 537 psi Pc 3 14 MPa 455 psi Pc 3 45 MPa 500 psi Pc 3 67 MPa 532 psi Pc 3 62 MPa 525 psi Pc 3 57 MPa 518 psi Compressor step 1 After 15 seconds Pc 3 33 MPa 483 psi After 10 seconds Upper limit compressor step max Max Step Pc 3 72 MPa 540 psi Pc High pressure sensor detec...

Page 68: ...a 540 psi Normal Operation 9 step down All units Compressor step 1 3 step up Current step maintained High pressure standby 2 times within 40 minutes Pc High pressure sensor detection value for master unit Abnormal stop E3 is displayed Pc 3 31 MPa 480 psi After 10 seconds After 10 seconds After 15 seconds High pressure switch 4 0 MPa 580 psi is activated ...

Page 69: ...4 is displayed Low pressure standby 3 times within 60 minutes Low pressure standby 4 times within 60 minutes Normal Operation 9 step down 9 step up 3 step up 21 step down After 10 seconds After 15 seconds After 15 seconds After 10 seconds Pe 0 07 MPa 10 2 psi Pe 0 04 MPa 5 8 psi Pe 0 12 MPa 17 4 psi Pe 0 09 MPa 13 1 psi Pe 0 07 MPa 10 2 psi Pe 0 06 MPa 8 7 psi Compressor step 1 After 10 seconds Up...

Page 70: ...After 20 seconds HTdi 135 C 275 F HTdi 120 C 248 F continues for 10 minutes Ti 120 C 248 F continues for 5 seconds Ti 115 C 239 F continues for 10 minutes OR HTdi Value of inverter compressor discharge pipe temperature Tdi compensated with outdoor air temperature Ti Compressor body temperature A Maximum of HTdi and Ti X C Y F RXLQ72TA RXYQ72 120TA 115 C 239 F constant RXLQ96 120TA RXYQ144 168TA Te...

Page 71: ...he following control of integrated as well as multi units for each inverter compressor Inverter compressor Normal operation Compressor body temperature standby Reduce compressor capacity step Compressor body temperature 108 C 226 4 F Compressor body temperature 135 C 275 F When occurring 3 times within 100 minutes the error code F3 is output Sub code 20 21 22 Normal operation Inverter current stan...

Page 72: ...97 6 F less than 93 C 199 4 F less than 87 C 188 6 F C more than 100 C 212 F more than 100 C 212 F more than 95 C 203 F Condition RXLQ96 120TATJU RXLQ96 120TAYDU RXLQ96 120TAYCU RXYQ144 168TAYCU A more than 70 C 158 F more than 70 C 158 F more than 90 C 194 F B less than 67 C 152 6 F less than 67 C 152 6 F less than 87 C 188 6 F C more than 75 C 167 F more than 75 C 167 F more than 95 C 203 F Norm...

Page 73: ... exchanger mode For heat exchanger mode Electronic expansion valve Heat exchanger upper Y1E Same as normal operation Same as normal operation Electronic expansion valve Heat exchanger lower Y3E Electronic expansion valve Subcooling heat exchanger Y2E 0 pulse 0 pulse Electric expansion valve Subcooling injection Y4E 760 pulse 760 pulse Electronic expansion valve Refrigerant cooling Y5E Same as norm...

Page 74: ...M2F For heat exchanger mode Electronic expansion valve Heat exchanger upper Y1E Same as normal operation Electronic expansion valve Heat exchanger lower Y3E Electronic expansion valve Subcooling heat exchanger Y2E 0 pulse Electric expansion valve Subcooling injection Y4E 760 pulse Electronic expansion valve Refrigerant cooling Y5E Same as normal operation Electronic expansion valve Receiver gas pu...

Page 75: ...me as normal operation Electronic expansion valve Receiver gas purge Y7E 0 pulse Solenoid valve Oil separator oil return Y1S ON Solenoid valve Hot gas bypass Y2S OFF Solenoid valve Liquid pipe Y3S ON Four way valve HP LP gas pipe Y4S Hold Four way valve Heat exchanger lower Y5S Hold Four way valve Heat exchanger upper Y6S Hold Solenoid valve Accumulator oil return Y7S Same as normal operation Endi...

Page 76: ...valve Subcooling injection Y4E 760 pulse Electronic expansion valve Refrigerant cooling Y5E Same as normal operation Electronic expansion valve Receiver gas purge Y7E 0 pulse Solenoid valve Oil separator oil return Y1S ON Solenoid valve Hot gas bypass Y2S OFF Solenoid valve Liquid pipe Y3S ON Four way valve HP LP gas pipe Y4S Hold Four way valve Heat exchanger lower Y5S Hold Four way valve Heat ex...

Page 77: ...ollowing diagram shows outdoor unit rotation in combination of 3 outdoor units Note 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 changed thereafter These names are different from master unit and slave unit for control The outdoor unit connected the control wires F1 and F2 for the indoor unit should be desi...

Page 78: ...e 2 Details of operation Disable the defective outdoor unit from operating and then only operate other outdoor units On the system with 1 outdoor unit this emergency operation is not available 8 2 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 additi...

Page 79: ...ressure value above upper limit of sensor error JC Mechanical internal load on compressor increases Low compression ratio can result in insufficient compressor internal oil lubrication Heating is disabled when outdoor air temperature is above 26 C 78 8 F Forced thermostat OFF on indoor units Outdoor unit fan operates at step 1 Heating operation is enabled when outdoor air temperature drops below 2...

Page 80: ...utdoor unit Output Thermostat ON operation signal to outdoor unit Output 1 If any error occurs the relevant error code will be displayed according to the error code display of the remote controller 2 When the aux electric heater turns ON the fan will stop after it conducts residual operation 3 When the drain pump kit turns ON the drain pump kit will stop after it conducts residual operation for a ...

Page 81: ...roller the wind direction is set to 100 horizontal while in heating operation 11 Fan According to fan speed instruction from the remote controller the fan is put into operation in LL mode while in heating operation 12 Wind direction When the heating thermostat turns OFF the wind direction will be set to 100 horizontal 13 Hot start If the condenser inlet temperature exceeds 34 C 93 2 F at the time ...

Page 82: ...suction air thermistor Default setting When using the remote controller thermistor Field setting is required Examples are given to illustrate a control target temperature that satisfies the remote controller set temperature Remote controller set temperature Control target temperature Remote controller set temperature Control target temperature 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 ...

Page 83: ...target temperature for operation What is the temperature around people The temperature around people refers to the temperature of the living space obtained from the temperature around the ceiling and the temperature underfoot The temperature is calculated using the detected values of the suction air thermistor and the infrared presence floor sensor It is difficult to use only suction air temperatu...

Page 84: ...mote controller thermistor near the position of the user when the suction temperature is near the set temperature Assuming the set temperature in the figure above is 24 C 75 F and the suction temperature has changed from 18 C 64 F to 30 C 86 F A F This example also assumes there are several other air conditioners and the suction temperature changes even when the thermostat is off Suction air therm...

Page 85: ...uction temperature has changed from 18 C 64 F to 28 C 82 F A D This example also assumes there are several other air conditioners and the suction temperature changes even when the thermostat sensor is off Suction air thermistor is used for temperatures from 18 C 64 F to 25 C 77 F A C Remote controller thermistor is used for temperatures from 25 C 77 F to 28 C 82 F C D Assuming suction temperature ...

Page 86: ...02 Tro will be the same as the cooling set temperature at the time of starting dry operation 1 The thermistor for room temperature detection depends on the field setting 10 20 2 2 Description of symbols T Room temperature Remote controller set temperature Tro Room temperature at the start of dry operation Tr Room temperature Thermostat OFF Normal operation Thermostat ON T 1 0 C 1 8 F T 1 0 C 1 8 F...

Page 87: ...e to operate outside of use range To avoid the above condition a limit based on the suction air temperature is set for the use range of the temperature around people Heating operation When the floor temperature is higher than suction air temperature R1T R1T will be treated as the control target temperature in operation When the temperature around people is 33 C 91 4 F or higher R1T will be treated...

Page 88: ...ing mode Cooling mode Control temp Differential value set to 1 C 1 8 F Set heating temp Set cooling temp Heating mode Control temp Differential value set to 2 C 3 6 F Heating mode Control temp Differential value set to 3 C 5 4 F Heating mode Cooling mode Control temp Set heating temp Set cooling temp Set heating temp Set cooling temp Differential value set to 4 C 7 2 F Heating mode Cooling mode Co...

Page 89: ...y After the thermostat turns OFF the drain pump continues to operate for another 5 minutes 1 If the float switch turns ON again during the residual operation of the drain pump cooling operation also turns on again thermostat ON 2 If the float switch remains OFF even after the residual operation of the drain pump has ended the error code A3 is displayed on the remote controller 3 The drain pump tur...

Page 90: ...e drain pump turns ON simultaneously 1 If the float switch continues to turn OFF and ON 5 times consecutively it is judged as a drain system error and the error code AF is displayed on the remote controller 2 The drain pump continues to turn ON OFF in accordance with the float switch ON OFF even after AF is displayed on the remote controller 3 While the error code AF is displayed if the float swit...

Page 91: ...s lower As T Remote controller set temp Suction air temp becomes smaller SHS becomes higher Subcooling degree control in heating operation This function is used to adjust the opening of the electronic expansion valve so that the high pressure equivalent saturated temperature Tc which is converted from the detected pressure of the high pressure sensor in the outdoor unit and the subcooling degree S...

Page 92: ...erature 1 C 30 2 F for total of 40 minutes or Liquid pipe temperature 5 C 23 F for total of 10 minutes Condition for cancelling Liquid pipe temperature 7 C 44 6 F for 10 minutes continuously The idea of freeze up prevention control Difficult to carry out freeze up prevention operation For comfort suppression of frequent thermostat ON OFF is necessary Suppressing the switching frequency of the comp...

Page 93: ...f 15 minutes or Liquid pipe temperature 0 C 32 F for 1 minute continuously During freeze up prevention operation the airflow rate is fixed to LL The cancelling conditions are same as the standard 0ºC 32 F 7ºC 44 6 F 10 min 1 min 1ºC 33 8 F t1 t2 t3 t4 7ºC 44 6 F 10 min OR t 15 minutes Freeze up prevention control Forced OFF by thermostat Freeze up prevention control Forced OFF by thermostat Liquid...

Page 94: ...mode for prevention of cold air Swing LL Horizontal Horizontal Horizontal Horizontal Airflow direction set LL Horizontal Horizontal Horizontal Horizontal Stop Swing OFF Horizontal Horizontal Horizontal Totally closed Airflow direction set OFF Horizontal Horizontal Horizontal Totally closed Cooling Thermostat ON in program dry Swing L 1 Swing Swing Swing Swing Airflow direction set L 1 Set Set Set ...

Page 95: ...ore initiating the hot start OFF Hot start control Hot start in progress Normal control Normal control H L remote controller setting LL OFF Remote controller setting P0 Horizontal Fan Louver Ending condition Lapse of 3 minutes TH2 34 C 93 2 F Tc 52 C 125 6 F OR Starting condition Defrost ending Oil return ending Thermostat ON OR The fan is not OFF before initiating the hot start LL The fan is OFF ...

Page 96: ...XFQ FXZQ and FXEQ models Factory setting FXFQ models draft prevention position FXZQ FXEQ models standard position 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 Draft prevention position Standard position Prohibited Prohibited Dirt prevention position P0 P0 P0 P1 P2 P2 P1 P3 P3 P4 P4 P1 P2 P3 P4 Same as existing position Se...

Page 97: ...ted by converting the heater temperature into the condensing pressure equivalent saturated temperature Tc according to the temperature detection through the high pressure sensor S1NPH of the outdoor unit Fan residual operation While the heater turns OFF in order to prevent the activation of the thermal protector the fan conducts residual operation for a given period of time after the heater turns ...

Page 98: ...g Automatic heating Auxiliary heater enabled 1 Not in heating Automatic heating Auxiliary heater enabled 0 3 Heater not allowed Heater allowed Heater 1 OFF Heater 2 OFF OR OR OR Thermostat OFF Operation OFF Heater 1 OFF Heater 2 OFF Thermostat OFF Thermostat ON Thermostat ON Condition C Condition B Condition B Thermostat OFF H P Heating In operation Heater 1 OFF Heater 2 OFF Fan ON H P Heating In ...

Page 99: ...emperature condition ON 2 Heater ON permission Defrost oil Return 0 4 Not during defrost oil return No fan motor system error During defrost oil return Heater ON permission Defrost oil return 1 4 OR Not during defrost oil return Fan motor system error Heater ON permission Defrost oil return 0 4 ON OFF 49 120 2 54 129 2 Thermostat Tc C F ON OFF Thermostat 46 114 8 49 120 2 TH2 C F 1 Electric heater...

Page 100: ...ial value Thermostat OFF Operation OFF ENTRY 5 minutes timer starts Condition A Time up 2 H P Heating Not in operation Heater 1 ON Heater 2 OFF Fan ON Entry 5 minutes timer starts OR Thermostat step 2 OFF H P Heating Not in operation Heater 1 ON Heater 2 ON OFF for single heater Fan ON Electric heater capacity setting Setting not available Thermostat step 2 ON Time up Electric heater capacity sett...

Page 101: ... 4 A and B values vary automatically based on the field setting 12 22 2 5 If directly after a change in conditions it is such that the thermostat could be either ON or OFF controlled temperature is within ranges A and B the thermostat will be switched to ON No errors except errors in which the system keeps operating has occurred Remote controller ON Thermostat step 1 OFF Thermostat step 2 OFF Ther...

Page 102: ...CLEANER terminal on the PCB 2 Field setting 14 24 4 Refer to page 109 9 15 2 Humidifier When a humidifier is connected onsite the fan operates with the airflow rate set of the remote controller or with the H tap 1 External input ON is an input signal to the X1M HUMIDIFIER terminal on the PCB 2 Field setting 14 24 4 Refer to page 109 Note This control is not applicable to the humidifier connected t...

Page 103: ...t turns ON the relay on the X2M ECONOMIZER2 on the PCB 2 External input ON is an input signal to the X1M ECONOMIZER1 terminal on the PCB 3 Refer to Optional Kit Setting UV lamp Humidifier Economizer for FXTQ TA model on page 109 4 Remote control ON signal Contact output which shows the operating status of the indoor unit This signal turns on the relay X2M CONTROL ON OFF on the PCB Elimination of o...

Page 104: ...d Settings for Outdoor Air Processing Unit 112 1 7 Setting of Operation Control Mode 112 2 Field Setting from Outdoor Unit 114 2 1 DIP Switch Setting 114 2 2 Accessing the BS Buttons on the Logic Board 117 2 3 Operating the BS Buttons and DIP Switches on the Logic Board 118 2 4 Connecting of the Optional PC Configurator Cable to the Outdoor Unit 120 2 5 Monitoring Function and Field Settings 121 2...

Page 105: ...ase of group total setting 1 Press and hold Cancel button for 4 seconds or more Service settings menu is displayed 2 Select Field Settings in the Service Settings menu and press Menu OK button Field settings screen is displayed 3 Highlight the mode and select desired Mode No by using Up Down button 4 In the case of setting per indoor unit during group control When Mode No such as 20 21 22 23 25 ar...

Page 106: ...een returns 8 In the case of multiple setting changes repeat 3 to 7 9 After all setting changes are completed press Cancel button twice 10 Backlight goes out and Checking the connection Please standby is displayed for initialization After the initialization the basic screen returns Installation of optional accessories on the indoor unit may require changes to field settings See the manual of the o...

Page 107: ...EST button for 4 seconds during normal mode to enter the field setting mode 2 Press the MODE button to select the desired mode No 3 Press the UP button to select the first code No 4 Press the DOWN button to select the second code No 5 Press the RESERVE button to confirm the setting 6 Press the INSPECTION TEST button to return to the normal mode RESERVE button INSPECTION TEST button Mode No Field s...

Page 108: ...erature setting W 4 During group control when setting by each indoor unit mode No 20 22 and 23 have been selected press the BS8 4 button unit No and select the indoor unit No to be set This operation is unnecessary when setting by group 5 Press the BS9 button 5 set A and select first code No 6 Press the BS10 button 6 set B and select second code No 7 Press the BS7 button 7 set cancel once and the ...

Page 109: ...emperature Ton Refer to page 102 for details 2 Auxiliary electric heater OFF temperature Toff 3 Setting the airflow rate when heating Standard Slightly increased Increased 3 6 Electric heater setting Refer to page 103 for details 5 6 Electric heater capacity setting Refer to page 103 for details 6 9 Setting the rate of human detection High sensitivity Low sensitivity Standard sensitivity Infrared ...

Page 110: ... rate Standard High ceiling 1 High ceiling 2 1 Airflow direction setting Set when a blocking pad kit has been installed F 4 directions T 3 directions W 2 directions 2 Swing pattern settings All direction synchronized swing Facing swing 3 Operation of downward flow flap Equipped Not equipped 4 Setting of airflow direction adjustment range Draft prevention Standard Ceiling soiling prevention 5 Setti...

Page 111: ... Concealed floor standing type Air handling unit Round flow 4 way flow FXFQ FXZQ TA FXZQ M FXUQ FXEQ FXDQ FXSQ FXMQ FXHQ FXAQ FXLQ FXNQ FXTQ Filter sign z z z z z z z z z z z z z Ultra long life filter sign z z z z Remote controller z z z z z z z z z z z z z Set fan speed when thermostat OFF z z z z z z z z z z z z z Airflow adjustment ceiling height z z z z z Airflow direction z z z z z Airflow d...

Page 112: ...de No is set to 03 room temperature is controlled by the remote controller thermistor FXTQ TA When the Second Code No is set to 02 room temperature is controlled by the remote sensor thermistor When the Second Code No is set to 03 room temperature is controlled by the remote controller thermistor Mode No First Code No Second Code No Standard Filter Long Life Filter Ultra Long Life Filter Contents ...

Page 113: ... 68 71 6 75 2 78 8 82 4 86 89 6 F F 14 16 18 20 22 24 26 28 30 32 34 66 2 62 6 69 8 73 4 77 80 6 84 2 87 8 91 4 95 98 6 F F 57 2 60 8 64 4 68 71 6 75 2 78 8 82 4 86 89 6 93 2 In cooling In heating Suction air temperature Suction air temperature Suction air thermistor Suction air thermistor Suction air thermistor Suction air thermistor Suction air thermistor Suction air thermistor Suction air therm...

Page 114: ...ate of absence continues for a certain period of time Absent time defined for detection can be selected as follows The set temperature displayed on the remote controller remains same even if the target temperature is shifted As soon as people is detected while the temperature is shifted this control will be cancelled reset Mode No First Code No Second Code No Contents 10 20 3 01 Displayed 02 Not d...

Page 115: ...tat ON Mode No First Code No Symbol Second Code No 01 02 03 04 05 06 11 21 1 Ton 4 C 7 2 F 3 5 C 6 3 F 3 C 5 4 F 2 5 C 4 5 F 2 C 3 6 F 1 5 C 2 7 F Toff 2 C 3 6 F 1 5 C 2 7 F 1 C 1 8 F 0 5 C 0 9 F 0 C 0 F 0 5 C 0 9 F Mode No First Code No Symbol Second Code No 01 02 03 04 05 06 11 21 1 Ton 4 C 7 2 F 3 5 C 6 3 F 3 C 5 4 F 2 5 C 4 5 F 2 C 3 6 F 1 5 C 2 7 F 2 Toff 2 C 3 6 F 1 5 C 2 7 F 1 C 1 8 F 0 5 C...

Page 116: ...r run for defrost oil return operation 11 21 3 01 Electric heater with heat pump not allowed Not allowed 02 Electric heater with heat pump allowed Not allowed 07 Electric heater with heat pump not allowed Allowed 08 Electric heater with heat pump allowed Allowed Model Mode No First Code No Second Code No 01 02 03 04 05 06 07 08 09 10 Heater kW No heater kit 3 5 6 8 10 15 19 20 25 FXTQ09TAVJUA 11 2...

Page 117: ...e infrared presence floor sensor only Change the ratio between the suction air temperature and floor temperature used to calculate the temperature around human The temperature around human is calculated using the values of the suction air thermistor and the infrared floor sensor The factory setting is Normal the average value of the suction air temperature and the floor temperature is applied Howe...

Page 118: ...ode No Second Code No Contents 11 21 9 01 4 C 7 2 F 02 2 C 3 6 F 03 0 C 0 F 04 2 C 3 6 F Environment Operation Mode Problem Setting Value The unit is installed close to a wall or a window High thermal capacity of the floor whose material is concrete etc There are many heat sources like a PC There is a non negligible heat source such as floor heating Heating Heated too much 2 C 3 6 F Heated little ...

Page 119: ...n power supply turned ON again return to the same operation condition as that of before power failure For the above reasons when the unit is set enabling to utilize Auto restart function after power failure reset utmost care should be paid for the occurrence of the following situation Airflow when Cooling Thermostat is OFF This is used to set airflow to LL airflow when cooling thermostat is OFF Mo...

Page 120: ...set onsite Mode No First Code No Second Code No Contents 13 23 0 01 Standard 02 Slight increase 03 Normal increase Mode No First Code No Second Code No Contents Ceiling height 4 way Outlets 3 way Outlets 2 way Outlets 13 23 0 01 Standard Lower than 2 7 m 8 3 4 ft Lower than 3 0 m 10 ft Lower than 3 5 m 11 1 2 ft 02 High Ceiling 1 Lower than 3 0 m 10 ft Lower than 3 3 m 10 3 4 ft Lower than 3 8 m 1...

Page 121: ...PB cannot be set to 110 200 Pa 0 44 0 80 inWG 3 FXMQ54PB cannot be set to 30 Pa 0 12 inWG or 150 200 Pa 0 60 0 80 inWG Model No First Code No Second Code No Contents 13 23 3 01 Equipped 02 Not equipped Mode No First Code No Second Code No Contents 13 23 4 01 Upward Draft prevention 02 Standard 03 Downward Ceiling soiling prevention Model No First Code No Second Code No Contents 13 23 5 01 Standard...

Page 122: ... 0 16 inWG 1 2 05 50 Pa 0 20 inWG 06 60 Pa 0 24 inWG 07 70 Pa 0 28 inWG 08 80 Pa 0 32 inWG 09 90 Pa 0 36 inWG 10 100 Pa 0 40 inWG 11 110 Pa 0 44 inWG 12 120 Pa 0 48 inWG 13 130 Pa 0 52 inWG 14 140 Pa 0 56 inWG 15 150 Pa 0 60 inWG 2 Mode No First Code No Second Code No Contents UV lamp humidifier fan speed Economizer setting for Mech standby duration minutes 14 24 4 01 Refer to controller 10 02 Hig...

Page 123: ...idual operation of Energy recovery ventilator using the remote controller central unit when Energy recovery ventilator is built in Switch only when Energy recovery ventilator is built in Display of Contact Center For BRC1E73 only You can turn OFF the display of DAIKIN Contact Center as Contact for Service Display Display of Error Codes on the Remote Controller For BRC1E73 only Error code four digi...

Page 124: ...r or branch air duct is equipped This setting will prevent the airflow block is advertently set to ON Ensure that this setting is Disable airflow block when using together with options listed above Room Temperature Display For BRC1E73 only A Detailed display screen can be selected as the display screen This setting is used if you do not want to display Room temperature display on the Detailed disp...

Page 125: ...l only possible by remote controller Used when you want to turn ON by central remote controller only and OFF by remote controller only Centralized Used when you want to turn ON by central remote controller only and turn ON OFF freely by remote controller during set time Individual Used when you want to turn ON OFF by both central remote controller and remote controller Timer operation possible by ...

Page 126: ...ontrol Operation mode setting Unified operation individual operation by central remote controller or operation controlled by timer Unified OFF individual stop by central remote controller or timer stop ON OFF control impossible by remote controller Rejection Example Rejection Example Rejection Example Rejection Acceptance 0 Rejection 10 Acceptance Example Acceptance Example 1 Example Rejection 11 ...

Page 127: ...m it is alternatively possible to make several commissioning field setting through a personal computer interface for this option EKPCCAB1 is required The installer can prepare the configuration off site on PC and afterwards upload the configuration to the system 2 1 DIP Switch Setting 2 1 1 COOL HEAT Selection For factory mounted board only use DIP switch DS1 1 if required DIP switch Setting item ...

Page 128: ...ter initialization a test operation is required from outdoor unit hold BS2 SET till indication t01 appears 3 BS button BS1 BS3 2 Segment display SEG1 SEG3 4 DIP switch DS1 1 4 DS2 1 4 1 Microcomputer normal monitor HAP Connection terminal for transmission use ON OFF 1 2 3 4 DS1 ON OFF 1 2 3 4 DS2 Initial position of DIP switches Position Set switch 1 Microcomputer normal monitor This monitor blink...

Page 129: ...nnected Application model The setting method represents the position of switches RXLQ72TA RXYQ72TA Set DS2 2 to ON RXLQ96TA RXYQ96TA Set DS2 1 and DS2 2 to ON RXLQ120TA RXYQ120TA Set DS2 3 to ON RXYQ144TA Set DS2 2 and DS2 3 to ON RXYQ168TA Set DS2 1 DS2 2 and DS2 3 to ON 1 2 3 4 1 2 3 4 ON OFF DS1 DS2 1 2 3 4 1 2 3 4 ON OFF DS1 DS2 1 2 3 4 1 2 3 4 ON OFF DS1 DS2 ON OFF 1 2 3 4 1 2 3 4 DS1 DS2 ON ...

Page 130: ...ctrical component box front plate see figure You can see the three BS buttons and the three 7 segment displays and DIP switches Operate the switches and BS buttons with an insulated stick such as a closed ball point pen to avoid touching of live parts Location of the segment displays buttons and DIP switches 1 3 2 1 Front plate 2 Inspection cover 3 Main PCB with 3sevensegmentdisplay and 3 BS butto...

Page 131: ...button switches which are located on the outdoor unit PCB A1P Turn ON the power supply of the outdoor unit and all indoor units When the communication between indoor units and outdoor unit s is established and normal the segment indication state will be as below default situation when shipped from factory When turning ON the power supply flashing as indicated First checks on power supply are execu...

Page 132: ...re connected to the system Result mode1 setting 10 is addressed and selected return value is monitored information To leave the monitoring function press BS1 once you will return to the default situation when shipped from factory Mode 2 Mode 2 is used to set field settings of the outdoor unit and system Changing and access the setting in mode 2 Once mode 2 is selected press BS1 for more than 5 sec...

Page 133: ...segment indication When achieved define the setting value by pressing BS3 once To start operation according to the chosen setting confirm again by pressing BS3 To leave the monitoring function press BS1 2 times you will return to the default situation when shipped from factory Operating the DIP switches By operating the DIP switches it is possible to 2 4 Connecting of the Optional PC Configurator ...

Page 134: ...rrently operating under low noise restrictions 0 unit is currently not operating under low noise restrictions Night time low noise operation reduces the sound generated by the unit compared to nominal operating conditions Night time low noise operation can be set in mode 2 There are two methods to activate night time low noise operation of the outdoor unit system The first method is to enable an a...

Page 135: ...erface they can be checked again through this monitoring settings 1 40 shows the current cooling comfort setting 1 41 shows the current heating comfort setting 2 5 2 Mode 2 Mode 2 is used to change the field settings of the system Consulting the current field setting value and changing the current field setting value is possible In general normal operation can be resumed without special interventi...

Page 136: ...nal PCB DTA104A61 62 Ensure that also field setting 2 12 1 is set to enable input from optional PCB DTA104A61 62 2 5 Cross wiring check Default value 0 Not active Set 1 force all connected indoor units to operate the indoor fan on high speed This setting can be made to check which units are missing in the communication if the number of indoor units do not correspond to the system lay out Ensure th...

Page 137: ... an AIRNET address Also to facilitate the recognition of a system in the map lay out of the service checker type III set each system a unique address between 1 and 63 When duplicating of AIRNET address UC error code will appear on central control 2 16 Heat pump lockout 1 Heat pump is always locked out when this setting is ON If the indoor fan control needs to be changed or the auto backup function...

Page 138: ...stop the refrigerant recovery vacuuming mode press BS3 If BS3 is not pressed the system will remain in refrigerant recovery vacuuming mode 2 22 Automatic night time low noise setting and level during night time By changing this setting you activate the automatic night time low noise operation function of the unit and define the level of operation Depending on the chosen level the noise level will ...

Page 139: ...s to refer to the result on the inverter checker module All 3 phases and neutral are available and Inverter PCB control is active Check if the green LED HAP on the inverter PCBs are blinking normal approx 1 second If LEDs are OFF need to exit the standby mode of the inverter Disconnect and reconnect power supply control PCB or Forced thermostat ON condition or Make shortly set 2 6 1 forced thermos...

Page 140: ...op because airflow rate of outdoor unit is reduced Default value 0 Capacity priority cannot be used Field setting 1 Capacity priority can temporary cancel the night time low noise operation Capacity priority can be initiated when certain operation parameters approach the safety setting Raise in high pressure during cooling Drop in low pressure during heating Raise of discharge pipe temperature Rai...

Page 141: ...itions when an external signal is sent to the unit this setting defines the level power consumption limitation that will be applied for step 2 The level is according to the table Value 2 30 Power consumption limitation approximately 1 60 2 65 3 default 70 4 75 5 80 6 85 7 90 8 95 Value 2 31 Power consumption limitation approximately 1 default 40 2 50 3 55 Operation sound Rated Level 1 Level 2 Leve...

Page 142: ... units connection capacity 3 Fan speed is limited to L tap when outdoor air temperature goes down to below 29 5 C 85 1 F and indoor condition A It returns to remote controller setting when outdoor air temperature goes up to over 32 5 C 90 5 F or indoor condition B 4 Fan speed is limited to L tap when outdoor air temperature goes down to below 23 5 C 74 3 F and indoor condition A It returns to remo...

Page 143: ...ed airflow 2 Depends on the indoor unit field setting 12 22 3 Value 2 37 Heat pump lockout 2 0 default OFF 1 Mode 1 2 Mode 2 3 Mode 3 4 Mode 4 5 Mode 5 6 Mode 6 Mode Description Actions Field setting Shorted between Heating Thermo on Heating Thermo off Heater Fan Heater Fan Mode 1 Lockout is controlled by an external input to ABC terminal 2 37 Mode 1 A C ON ON H L OFF LL 2 B C OFF Mode 2 1 2 37 Mo...

Page 144: ...ality H9 Outdoor air thermistor R1T abnormality J3 Discharge pipe thermistor R21T abnormality Compressor body thermistor R14T abnormality J5 Compressor suction thermistor R12T abnormality Suction pipe thermistor R10T abnormality J6 Heat exchanger deicer thermistor R11T abnormality Heat exchanger gas pipe thermistor R8T R9T abnormality J7 Receiver inlet thermistor R3T abnormality Subcooling heat ex...

Page 145: ...he interference of air blow noise between outdoor units Default value 0 Field setting Mode A 1 Mode B 2 2 49 Height difference setting Default value 0 In case the outdoor unit is installed in the highest position indoor units are installed on a lower position than outdoor units and the height difference between the lowest indoor unit and the outdoor unit exceeds 50 m 164 ft the setting 2 49 has to...

Page 146: ... by differential above the heat pump lockout temperature 2 81 Cooling comfort setting This setting is used in conjunction with setting 2 8 2 82 Heating comfort setting This setting is used in conjunction with setting 2 9 Value 2 78 Heat pump lockout temperature 0 default 26 1 C 15 F 1 23 3 C 10 F 2 20 5 C 5 F 3 17 7 C 0 F 4 15 C 5 F 5 12 2 C 10 F 6 9 4 C 15 F 7 6 6 C 20 F 8 3 8 C 25 F 9 1 1 C 30 F...

Page 147: ... before shutting off power to indoor unit If remote controller indicates Defrost mode wait 10 minutes after the defrost indication is cleared from the remote controller before shutting off power to indoor unit 3 After finishing maintenance return power to indoor unit 4 Return setting to 0 Following conditions need to be fulfilled Maximum equivalent piping length of the farthest indoor less than 12...

Page 148: ...o energize when the outdoor air temperature is recovered by differential above the auxiliary heater maximum allowable temperature Value 2 97 Auxiliary heater maximum allowable temperature 0 17 7 C 0 F 1 15 C 5 F 2 12 2 C 10 F 3 9 4 C 15 F 4 6 6 C 20 F 5 3 8 C 25 F 6 1 1 C 30 F 7 default 1 6 C 35 F 8 4 4 C 40 F 9 7 2 C 45 F 10 10 C 50 F 11 12 7 C 55 F 12 15 5 C 60 F 13 18 3 C 65 F 14 Auxiliary heat...

Page 149: ...into normal operation mode B When night time low noise operation is carried out automatically External control adaptor for outdoor unit is not required 1 While in setting mode 2 select a night time low noise operation level for the item 2 22 2 If necessary while in setting mode 2 select a starting time of night time low noise operation i e 8 00 PM 10 00 PM or 12 00 AM for the item 2 26 Use the sta...

Page 150: ...ation level setting Factory setting is OFF Night time Operation sound level set with night time low noise operation setting 6 00 AM 8 00 PM 10 00 PM 12 00 AM 7 00 AM 8 00 AM Set with night time low noise operation end setting Factory setting is 8 00 AM Set with night time low noise operation start setting Factory setting is 10 00 PM Operation sound Rated Level 1 Level 2 Level 3 Time set with night...

Page 151: ... the figure above 2 While in setting mode 2 set the item 2 12 External low noise or demand setting to ON 3 If necessary while in setting mode 2 select a demand 1 level for the item 2 30 Description of setting Setting procedure Setting item Description External control adaptor for outdoor unit Outdoor unit PCB Demand 1 Operate with power of 70 or less of the rating Short circuit between 1 and C of ...

Page 152: ...tor for outdoor unit as shown below To other external control adaptor for outdoor unit Outside wiring indicated by dotted line 1 2 3 C Demand Low noise Power consumption Rated 40 Forced thermostat OFF Fan operation 70 Demand level 1 instructing Power consumption set by Demand 1 level setting Demand level 2 instructing Demand level 3 instructing The power consumption during the demand level 1 instr...

Page 153: ...d match the LED display with the Setting No you want 3 Press the BS3 RETURN button once and the present setting content is displayed Press the BS2 SET button several times and match the LED display with the setting content you want 4 Press the BS3 RETURN button two times Returns to 1 5 Press the BS1 MODE button once Returns to the setting mode 1 and H1P turns OFF The power consumption set with Dem...

Page 154: ...nts Cautions or warnings Are all units securely installed z Dangerous for turning over during storm z Possible damage to pipe connections Is the ground wire installed according to the applicable local standard Dangerous if electric leakage occurs Are all air inlets and outlets of the indoor and outdoor units unobstructed z Poor cooling z Poor heating Does the drain flow out smoothly Water leakage ...

Page 155: ...ps for Over Under Voltage 186 2 13 Electronic Expansion Valve Coil Abnormality Dust Clogging 187 2 14 Drain Level above Limit 188 2 15 Capacity Determination Device Abnormality 189 2 16 Transmission Abnormality between Indoor Unit PCB and Fan PCB 190 2 17 Blower Motor Communication Error 192 2 18 Thermistor Abnormality 193 2 19 Combination Error between Indoor Unit PCB and Fan PCB 194 2 20 Blower ...

Page 156: ...Inverter Radiation Fin Temperature Abnormality 250 2 55 Field Setting after Replacing Outdoor Unit Main PCB Abnormality or Combination of PCB Abnormality 252 2 56 Refrigerant Shortage 253 2 57 Reverse Phase Open Phase 254 2 58 Power Supply Insufficient or Instantaneous Abnormality 256 2 59 Check Operation not Executed 258 2 60 Transmission Error between Indoor Units and Outdoor Units 259 2 61 Tran...

Page 157: ...ck 292 3 7 Vacuuming and Dehydration Procedure 293 3 8 Thermistor Check 294 3 9 Pressure Sensor Check 297 3 10 Broken Wire Check of the Relay Wires 298 3 11 Fan Motor Connector Check Power Supply Cable 299 3 12 Fan Motor Connector Check Signal Cable 299 3 13 Electronic Expansion Valve Coil Check 300 ...

Page 158: ...ing in a room The model must be selected to match the air conditioning load In cooling Too many heat sources e g OA equipment located in a room 4 The system does not operate The system stops and immediately restarts operation If the operation lamp on the remote controller turns ON the system will be normal These symptoms indicate that the system is controlled so as not to put unreasonable loads on...

Page 159: ...d according to the setting Even pressing the airflow rate setting button makes no changes in the airflow rate In heating operation when the room temperature reaches the set degree the outdoor unit will stop while the indoor unit is brought to fan LL operation so that no one gets cold air Furthermore if fan operation mode is selected when other indoor unit is in heating operation the system will be...

Page 160: ... operating sounds changes The reason is that the compressor changes the operating frequency Normal operation 12 Dust comes out from the system Dust comes out from the system when it restarts after the stop for an extended period of time Dust which has deposited on the inside of indoor unit is blown out from the system Normal operation 13 Odors come out from the system In operation Odors of room ci...

Page 161: ...e routinely lifted become horizontal during heating operation No defect Set louver to horizontal P0 during thermostat OFF 9 Although people are not present the infrared presence sensor detects human presence Check if there are any objects that generate temperature change when moving For example An electric heater with swing function Doors curtains blind switches Output of paper from a fax machine ...

Page 162: ...ctive action Screen Operation lamp Operation Status Display Abnormal shutdown The system stops operating The operation lamp green starts to blink The message Error Push Menu button will blink at the bottom of the screen Warning The system continues its operation The operation lamp green remains on The message Warning Push Menu button will blink at the bottom of the screen Press the Menu OK button ...

Page 163: ...eration in step 4 until you hear a continuous beep This continuous beep indicates that the error code is confirmed Continuous beep There is no abnormality 3 Press MODE button The left 0 upper digit indication of the error code blinks 4 Press UP button or DOWN button to change the error code upper digit until the receiver of the indoor unit starts to beep The upper digit of the code changes as show...

Page 164: ...rns to the normal mode 0 1 2 3 4 5 6 7 8 9 A H C J E F UP button DOWN button If no button is pressed for 1 minute equipment returns to normal mode 3 Press MODE button The upper digit blinks Normal mode 1 Press INSPECTION TEST button to enter inspection mode 7 When MODE button is pressed or no button is pressed for 1 minute equipment returns to normal mode 6 Change the lower digit with UP button or...

Page 165: ...e air thermistor abnormality 193 CC k Humidity sensor system abnormality 198 CE 1 k Infrared presence floor sensor error 199 CJ 2 k Remote controller thermistor abnormality 204 Outdoor Unit E1 l Outdoor unit PCB abnormality 205 E2 l Detection of ground leakage by leak detection circuit 206 Missing of ground leakage detection core 207 E3 l Actuation of high pressure switch 208 E4 l Actuation of low...

Page 166: ...9 P4 1 l Inverter radiation fin temperature abnormality 250 PJ l Field setting after replacing outdoor unit main PCB abnormality or combination of PCB abnormality 252 System U0 1 k Refrigerant shortage 253 U1 l Reverse phase open phase 254 U2 l Power supply insufficient or instantaneous abnormality 256 U3 l Check operation not executed 258 U4 l Transmission error between indoor units and outdoor u...

Page 167: ...s well as in the brush unit S shaped pipe and dust box Furthermore check for any stains of the light receiving and emitting parts of the infrared unit AH 06 Air filter rotation error when the self cleaning decoration panel is mounted Check for anything getting in the way of rotating the filter e g the filter comes off or the drive gear is clogged with foreign matter AH 07 Damper rotation error whe...

Page 168: ...itch S1PH Slave 2 E3 07 High pressure standby E3 latch error System integrated E3 13 Liquid stop valve check error Master E3 14 Liquid stop valve check error Slave 1 E3 15 Liquid stop valve check error Slave 2 E3 18 Overall retry of high pressure switch E4 01 Low pressure sensor error Master Refer to the E4 flowchart of each manual and make a diagnosis of the relevant unit based on the Error code ...

Page 169: ...tor M1F IPM error Master E7 10 Fan motor M2F IPM error Master E7 13 Fan motor M1F lock Slave 1 E7 14 Fan motor M2F lock Slave 1 E7 17 Fan motor M1F momentary overcurrent Slave 1 E7 18 Fan motor M2F momentary overcurrent Slave 1 E7 21 Fan motor M1F IPM error Slave 1 E7 22 Fan motor M2F IPM error Slave 1 E7 25 Fan motor M1F lock Slave 2 E7 26 Fan motor M2F lock Slave 2 E7 29 Fan motor M1F momentary ...

Page 170: ...Slave 2 E9 23 Defective electronic expansion valve coil Y2E Master E9 24 Defective electronic expansion valve coil Y2E Slave 1 E9 25 Defective electronic expansion valve coil Y2E Slave 2 E9 26 Electronic expansion valve coil Y4E error Master E9 27 Electronic expansion valve coil Y4E error Slave 1 E9 28 Electronic expansion valve coil Y4E error Slave 2 E9 29 Electronic expansion valve coil Y5E erro...

Page 171: ...tected during test operation H3 02 Harness abnormality Main inverter PCB Master unit Refer to the H3 flowchart of each manual and make a diagnosis of the relevant unit based on the Error code shown to the left H3 04 Harness abnormality Main inverter PCB Slave unit 1 H3 06 Harness abnormality Main inverter PCB Slave unit 2 H7 01 Motor position signal abnormality Master M1F Refer to the H7 flowchart...

Page 172: ...essor body thermistor R14T Open Slave 1 J3 50 Defective compressor body thermistor R14T Short Slave 1 J3 51 Defective compressor body thermistor R14T Open Slave 2 J3 52 Defective compressor body thermistor R14T Short Slave 2 J3 56 Discharge pipe warning Master J3 57 Discharge pipe warning Slave 1 J3 58 Discharge pipe warning Slave 2 J5 01 Defective compressor suction thermistor R12T Master Refer t...

Page 173: ...6 Error detection of heat exchanger gas upper thermistor R8T Slave 2 J6 17 Error detection of heat exchanger gas lower thermistor R9T Master J6 18 Error detection of heat exchanger gas lower thermistor R9T Slave 1 J6 19 Error detection of heat exchanger gas lower thermistor R9T Slave 2 J7 01 Defective receiver inlet thermistor R3T Master Refer to the J7 flowchart of each manual and make a diagnosi...

Page 174: ...tion of subcooling heat exchanger gas pipe thermistor R6T Master J9 09 Error detection of subcooling heat exchanger gas pipe thermistor R6T Slave 1 J9 10 Error detection of subcooling heat exchanger gas pipe thermistor R6T Slave 2 J9 11 Receiver gas purge thermistor R13T Master J9 12 Receiver gas purge thermistor R13T Slave 1 J9 13 Receiver gas purge thermistor R13T Slave 2 JA 06 Defective high pr...

Page 175: ...or 2 Inverter compressor M1C Slave 2 L1 14 IGBT error Inverter compressor M1C Slave 2 L1 15 Jumper settings error Slave 1 L1 16 Jumper settings error Slave 2 L1 21 DIP switch settings error Master L1 26 DIP switch settings error Slave 1 L1 28 Defective fan PCB EEPROM Fan M1F Master L1 29 Defective fan PCB EEPROM Fan M2F Master L1 32 Defective fan PCB EEPROM Fan M1F Slave 1 L1 33 Defective fan PCB ...

Page 176: ...e abnormality Master L4 13 Inverter radiation fin temperature rise abnormality Slave 1 L4 14 Inverter radiation fin temperature rise abnormality Slave 2 L4 18 Radiation fin temperature rise Fan M1F Slave 1 L4 19 Radiation fin temperature rise Fan M2F Slave 1 L4 20 Radiation fin temperature rise Fan M1F Slave 2 L4 21 Radiation fin temperature rise Fan M2F Slave 2 L5 03 Inverter compressor M1C momen...

Page 177: ...nit based on the Error code shown to the left P1 02 Inverter 1 power supply unbalanced voltage Slave 1 P1 03 Inverter 1 power supply unbalanced voltage Slave 2 P3 01 Defective reactor surface thermistor 1 Master Inverter PCB 1 Refer to the P3 flowchart of each manual and make a diagnosis of the relevant unit based on the Error code shown to the left P3 02 Defective reactor surface thermistor 1 Sla...

Page 178: ...e U2 flowchart Open phase of power supply The wiring between power supply and inverter PCB may be disconnected Check that power supply is connected to terminal block terminal block is connected to PCB without broken wire or disconnection and reactor wiring is secured If no abnormality is found follow the U2 flowchart Defective capacitor in main circuit P N on the inverter PCB electrolytic capacito...

Page 179: ...r unit connection capacity for test operation U9 01 Other indoor units abnormality Refer to the U9 flowchart of each manual and make a diagnosis of the relevant unit based on the Error code shown to the left UA 17 Incorrect electric heater capacity setting FXTQ TA Refer to page 276 Connection of excessive indoor units Refer to the UA flowchart of each manual and make a diagnosis of the relevant un...

Page 180: ... external ON OFF terminal Supposed Causes Actuation of external protection device Improper field setting Defective indoor unit PCB Troubleshooting ON OFF input from outside mode No 12 first code No 1 has been set to external protection device input second code No 03 by remote controller Check the setting state of the external ON OFF input by remote controller External protection device is connecte...

Page 181: ...s between external input terminals Supposed Causes Actuation of external protection device Defective indoor unit PCB Indoor unit fuse blown Troubleshooting Fuse F1U is blown External protection device is connected to TB4 and TB5 of the indoor unit terminal The external protection device is opened Replace the indoor unit PCB Actuation of external protection device Replace the fuse F1U YES YES NO NO...

Page 182: ...nvolatile memory Maintains memory contents even when the power supply is turned OFF Supposed Causes Defective indoor unit PCB External factor Noise etc Troubleshooting Turn the power supply OFF then the power ON again Does the system return to normal YES Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Replace the indoor unit main P...

Page 183: ...connectors or parts may be damaged Replace the float switch S1L Modify the float switch s connection and turn ON again Connect the drain pump and turn ON again Connect either a short circuit connector or float switch and turn ON again YES YES YES YES YES Go to the next page Replace the indoor unit main PCB A1P Loose the connection of connector NO NO NO YES NO NO YES NO NO Provide 208 230 V power s...

Page 184: ...or the indoor unit The voltage of drain pump terminals 2 is in accordance to the criteria 3 within 5 minutes of resetting the power supply A Model 1 Float switch S1L short circuit connector 2 Drain pump M1P connector 3 Drain pump M1P voltage FXFQ T X15A X10A 13 VDC FXFQ P X15A X25A 220 240 VAC FXZQ TA X15A X102A 13 VDC FXZQ M X8A X25A 220 240 VAC FXUQ P X15A X25A 13 VDC FXEQ P X15A X25A 13 VDC FXD...

Page 185: ...increase Supposed Causes Broken wires in short circuit of or disconnection of connectors from the fan motor harness Defective fan motor Broken wires or defective insulation Abnormal signal output from the fan motor defective circuit Defective indoor unit main PCB Instantaneous disturbance in the power supply voltage Fan motor lock Due to motor or external causes The fan does not rotate due to fore...

Page 186: ...tly rotated by hand NO NO YES Are there any foreign matter around the fan YES Is the resistance between the pins more than the judgement criteria Disconnect the connector from the fan motor and then make measurement of resistance between pins 2 Turn OFF the power supply and then wait for a period of 10 minutes Replace the indoor unit main PCB A1P Replace the indoor fan motor M1F Replace the indoor...

Page 187: ...A X20A Relay connector FXUQ A X20A Relay connector FXEQ P X20A FXSQ05 48TA X8A FXMQ07 12PB X8A FXAQ P X20A Measuring point FG GND Vsp GND Vcc GND Vdc GND Criteria 1 MΩ or more 100 kΩ or more 100 Ω or more 100 kΩ or more Judgment criteria 1 White 2 Orange 3 Brown 4 Blue 5 6 Red FG Vsp Vcc GND Vdc 1 White 2 Orange 3 Brown 4 Blue 5 6 7 Red FG Vsp Vcc GND Vdc PG Vsp Vcc GND Vm 1 2 White 3 Orange 4 Bro...

Page 188: ...t voltage to the fan Supposed Causes Defective indoor fan motor Broken wires Defective contact Troubleshooting NO YES YES Is the X4A connector securely connected NO Is the power of 12 VDC supplied between the Pins 1 and 3 when the X4A is disconnected and the power supply turns ON Replace the indoor unit main PCB A1P Properly connect the connectors At this time check for any defective connector con...

Page 189: ...e position signal of the fan motor Error from the current flow on the fan PCB when the fan motor starting operation Error Decision Conditions An overcurrent flows The rotation speed is less than a certain level for 6 seconds A position error in the fan rotor continues for 5 seconds or more Supposed Causes The clogging of a foreign matter The disconnection of the fan motor connectors X1A and X2A Th...

Page 190: ...ce the indoor fan motor M1F YES NO YES The fan can be moved lightly by hand after the fan motor connector of the fan PCB A2P is removed Replace the indoor fan motor M1F NO YES NO Go to the next page YES There is a foreign matter around the fan The resistance between the power wire terminals of the fan motor and motor frame metal part is 1 MΩ or below Remove the power wire connector from the fan mo...

Page 191: ...minals of the motor connector with five conductors Replace the indoor fan motor M1F YES NO Between Vcc and GND terminals and between GND and Hw Hv or Hu terminals are short circuited Replace the indoor fan motor M1F YES Replace the fan PCB A2P YES NO The resistance among U V and W are unbalanced or short circuited NO The HAP lamp of the indoor unit PCB A1P blinks and the HAP lamp of the fan PCB A2...

Page 192: ...n operation Supposed Causes Defective power supply for the indoor fan motor Clogged drain piping Actuation of the indoor unit safety device Defective contact in the fan wiring circuit Troubleshooting Properly connect the cable NO YES YES Is the power supply cable of the indoor fan properly connected NO Is the fan normally running Restart the fan Replace the indoor unit main PCB A1P It is supposed ...

Page 193: ...malities Checks the rotation speed at 5 second intervals using the feedback of the fan motor Performs rotation sampling 720 times takes approx one hour and if the rotation speed falls below 50 rpm over 100 times it is deemed abnormal operation When the sampling reaches 720 times the counted number will be cleared and the 720 times sampling restarts If during this the rotation command is stopped th...

Page 194: ...If the information shows Motor Lost Control or Current Trip status it will be deemed a MOTOR TRIP abnormal operation The system stops operating Error Reset Conditions If the indoor unit stops receiving abnormal information the error will be cleared Supposed Causes Fan or motor obstruction Blocked filters Power interruption low voltage Incorrect wiring Blockage in the airflow ductwork or ductwork u...

Page 195: ...ts If during this the rotation command is stopped the 5 second interval check is halted but the counted number will be kept When the rotation command is restarted the checks will resume Error Reset Conditions Determining successive abnormalities Checks the rotation speed at 5 second intervals using the feedback of the fan motor If that figure exceeds 150 rpm even once the error will be cleared Det...

Page 196: ...a model equipped with a swing flap function The swing motor works when the power supply is turned OFF and then restart The relay cable is short circuited or disconnected Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Provide 208 230 V power supply YES NO The connector is connected to the indoor unit PCB 1 Replace the limit switch ...

Page 197: ...on panel BYFQ60C FXZQ M X28A M1S FXUQ P X36A M1S M2S M3S M4S FXEQ P X36A M1S M2S M3S M4S FXHQ M X6A M1S FXAQ P X36A M1S Replace the power supply relay cable Replace the defective swing motor 2 Take the flap cam mechanism apart reassemble and turn ON again YES NO YES NO The relay cable has no continuity When the airflow direction flap cam mechanism is disconnected from the swing motor operation is ...

Page 198: ...ctive wiring Instantaneous power failure others Troubleshooting Check the condition of the power supply 1 Check if power supply voltage is 208 230 V 10 2 Check if there is power open phase or defective wiring 3 Check if power supply voltage unbalance is within 6 V YES There are problems on the condition of power supply described above Caution Be sure to turn off the power switch before connecting ...

Page 199: ... Decision Conditions If the information shows Over Under Voltage status it will be deemed a MOTOR VOLTS abnormal operation Error Reset Conditions If the information is normal the error will be cleared Supposed Causes High AC line voltage to indoor blower motor Low AC line voltage to indoor blower motor Incorrect wiring Corrective Actions Verify line voltage to indoor blower motor is within the ran...

Page 200: ...f suction air R2T temperature of liquid pipe of heat exchanger Supposed Causes Defective electronic expansion valve coil Defective indoor unit main PCB Defective relay cables Troubleshooting Refer to page 300 NO YES Power is supplied NO Electronic expansion valve is connected to X7A of indoor unit PCB NO Check of electronic expansion valve coil indicates normal NO YES YES YES Relay cables short ci...

Page 201: ...pressor is not in operation Error code is displayed but the system operates continuously Supposed Causes Humidifier unit optional accessory leaking Defective drain pipe upward slope etc Defective indoor unit main PCB Troubleshooting Modify the drain piping YES YES NO Field drain piping has a defect such as upward sloping NO A humidifier unit optional accessory is installed on the indoor unit Defec...

Page 202: ... the capacity code is not saved to the PCB and the capacity setting adaptor is not connected When a capacity that does not exist for that unit is set Supposed Causes The capacity setting adaptor was not installed Defective indoor unit main PCB Troubleshooting NO NO YES The indoor unit PCB was replaced with a spare PCB YES The capacity setting adaptor need to be installed when replacing the PCB Ins...

Page 203: ...PCB A1P Defective fan PCB A2P External factor such as instantaneous power failure Troubleshooting Under above field setting mode second code No is 01 NO NO YES Replace the fan PCB A2P YES YES Is the connector between indoor unit PCB A1P and fan PCB A2P accurately connected 1 NO C1 is displayed again Confirm the condition of transmission on indoor unit PCB using field setting mode 2 Connect the con...

Page 204: ...d remove the connector X70A of indoor unit PCB A1P 2 Short circuit X70A 3 After turning ON the power check below numbers under field setting from remote controller Confirmation Second code No at the condition of first code No 21 on mode No 41 After confirmation turn OFF the power take off the short circuit and connect X70A back to original condition Determination 01 Normal Other than 01 Transmissi...

Page 205: ...l message and determined as such by the indoor unit the indoor unit will execute a retry If everything fails for 5 seconds it is deemed to be a transmission abnormality Error Reset Conditions If the indoor unit receives even a single normal response message from the fan motor the error will be cleared Supposed Causes Incorrect or loose wiring Power interruption low voltage Corrective Actions Check...

Page 206: ... C9 for FXTQ TA models Refer to page 294 Is the thermistor normal Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged 5 kΩ to 90 kΩ Remove the thermistor from the indoor unit PCB Then insert the connector again Remove the thermistor from the indoor unit PCB and then make resistance measurement of the thermistor using a multimeter Norma...

Page 207: ...ity setting adaptor Field setting error Troubleshooting NO Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Was indoor unit main PCB A1P replaced with a spare PCB YES YES YES NO NO Was correct capacity setting adaptor installed when replacing it with a spare PCB After establishing transmission for indoor and outdoor units diagnose t...

Page 208: ...tion on the manufacturer ID and output of the fan motor when initializing the fan motor If those figures are not the values recognized by the indoor unit it will be deemed abnormal operation If deemed abnormal operation it will keep retrying until the figures match Error Reset Conditions If the manufacturer ID and output match the error will be cleared Supposed Causes Incorrect size motor Indoor u...

Page 209: ...ncluded among the periodic control status information Error is issued when the information shows abnormality Error Decision Conditions If the parameter information shows abnormality it will be deemed abnormal operation At that point parameter settings when initializing the fan motor will be implemented from the beginning Error Reset Conditions If the parameter information is normal the error will ...

Page 210: ... Troubleshooting Note 1 Connector and indoor unit PCB Refer to page 294 Is the optional remote sensor is installed Field setting 10 20 2 is set to 03 Connector is connected to the indoor unit PCB 1 Resistance is normal when measured after disconnecting the sensor from the indoor unit PCB Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be dama...

Page 211: ...seconds in the check mode 2 To display the code the INSPECTION TEST button of the remote controller must be pressed and held in the normal mode 3 If CC is displayed even after replacing the humidity sensor PCB A2P and taking the steps 1 and 2 replace the indoor unit main PCB A1P Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged YES N...

Page 212: ...nsor connector CE 01 Defective infrared floor sensor Temperature compensation circuit disconnection CE 02 Defective infrared floor sensor Temperature compensation short circuit CE 03 Defective infrared floor sensor element CE 04 Troubleshooting See diagnosis procedure 1 Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Error code CE ...

Page 213: ...ess data No 22 25 Connect the connector correctly Connect the connector correctly NO YES YES Is the connection of the connector on infrared presence sensor PCB A4P and the connector 1 on A2P normal NO YES YES Is the connection of the sensor connector normal Normal NO Displays 15 by the above verification method Normal NO Displays CE 01 again or 15 for sensor and address data Replace the sensor Mod...

Page 214: ... address data No 26 Connect the connector correctly Connect the connector correctly NO YES YES Is the connection of the connector on infrared floor sensor PCB A3P and the connector 1 on A2P normal NO YES YES Is the connection of the sensor connector normal Normal NO Displays by the above verification method Normal NO Displays CE 02 again or for sensor and address data Replace the sensor Model Conn...

Page 215: ...r output refer to sensor and address data No 26 Is the connection of the sensor connector normal Displays by the above verification method Displays CE 03 again or for sensor and address data Replace the sensor Connect the connector correctly Connect the connector correctly Normal Normal Is the connection of the connector on infrared floor sensor PCB A3P and the connector 1 on A2P normal Model Conn...

Page 216: ...r output refer to sensor and address data No 26 Is the connection of the sensor connector normal Displays by the above verification method Displays CE 04 again or for sensor and address data Replace the sensor Connect the connector correctly Connect the connector correctly Normal Normal Is the connection of the connector on infrared floor sensor PCB A3P and the connector 1 on A2P normal Model Conn...

Page 217: ...or Defective remote controller PCB Troubleshooting Note 1 How to delete the history of error codes Press the ON OFF button for 4 seconds or more while the error code is displayed in the inspection mode Clear the error code history 1 While in inspection mode press and hold the ON OFF button for a period of 4 seconds or more YES YES Is CJ displayed on the remote controller Is the field setting 10 20...

Page 218: ...en the indoor unit and the outdoor unit are not normal Supposed Causes Defective outdoor unit main PCB A1P Defective connection communication line between indoor and outdoor units Troubleshooting Return to normal YES External factor other than error for example noise etc Connect the communication line correctly Replace the outdoor unit main PCB A1P NO NO Check if inside outside relay wires of outd...

Page 219: ... YES NO NO Is wiring passing through the current sensor T1A proper Insulation failure of compressor Insulation failure of component except compressor Pass proper wiring through the sensor Turn OFF the power supply and then disconnect compressor lead wire Reinstall wiring and then turn ON the power supply again NO Replace the compressor M1C YES Replace the relevant component YES Normal Continue ope...

Page 220: ...nection Defective outdoor unit main PCB Troubleshooting Sub code 06 08 NO YES YES Is the system reset to normal Is X101A connected The error is considered to have resulted from external factors other than failures e g noise Turn OFF the power supply and then disconnect compressor leads YES Properly connect the connector NO Confirm if there is a leakage with a Megger tester Replace the outdoor unit...

Page 221: ...h pressure sensor Troubleshooting NO YES YES Replace the high pressure switch S1PH Remedy defective points Replace the high pressure sensor S1NPH YES Are the above 3 points OK Does the error E3 recur NO Is the operating pressure of the high pressure switch normal 4 0 MPa 580 psi NO YES Go to the next page Are the characteristics of the high pressure sensor normal 1 NO 1 Mount a pressure gauge on t...

Page 222: ...ace the outdoor unit main PCB A1P NO YES Check if the high pressure value and the actual value measured by pressure sensor are the same The high pressure sensor is normal and pressure detection with the outdoor unit main PCB is also normal The high pressure has really become high CHECK 1 Eliminate factors that cause the high pressure to rise Compare the high pressure value checked with the Service...

Page 223: ...ssure Refer to page 284 Refer to page 297 YES NO NO YES Are the characteristics of the low pressure sensor normal 1 NO YES 1 Mount a pressure gauge on the low pressure service port 2 Reset the operation using the remote controller and then restart the operation Is the stop valve open The low pressure sensor is normal and pressure detection with the outdoor unit main PCB is also normal The low pres...

Page 224: ... lock High differential pressure 0 5 MPa 72 5 psi or more UVW connection error Defective inverter PCB Stop valve is not opened Troubleshooting Make proper wire connections Make proper wire connections NO NO NO NO YES YES YES YES Go to the next page Power OFF Is the connection line of the compressor normal Are wire connections made to phases U V and W in the proper order and manner Are wire connect...

Page 225: ...work Pressure equalization failure may have occurred Check for the refrigerant system YES YES NO Replace the inverter PCB RXLQ TATJU RXLQ TAYDU A3P RXLQ TAYCU RXYQ TAYCU A4P NO The error recurs at startup Continue operation The error could have resulted from instantaneous power failure A Continue operation Replace the compressor CHECK 4 Is the power transistor normal Replace the inverter PCB This ...

Page 226: ...em will return an alarm if there is any operational unit other than that applicable to E6 or determine to be error if not Supposed Causes Defective compressor Defective high pressure sensor Defective low pressure sensor Defective outdoor unit main PCB Defective inverter PCB Troubleshooting NO YES Are the characteristics of the high pressure sensor normal 1 1 Mount a pressure gauge on the high and ...

Page 227: ...tor block to convert it to pressure Refer to page 286 Refer to page 297 NO YES Are the high pressure and low pressure checked by the service checker the same as the actual measured values of the high and low pressure sensors Replace the outdoor unit main PCB A1P NO Replace the inverter PCB RXLQ TATJU RXLQ TAYDU A3P RXLQ TAYCU RXYQ TAYCU A4P CHECK 4 Is the power transistor normal YES Replace the co...

Page 228: ...n motor and the PCB Fan does not rotate due to foreign matter caught in it Clearing condition fan motor performs normal operation for a period of 5 minutes Troubleshooting There are foreign matter around the applicable fan Remove the foreign matter YES Check for the connections of all fan motor connectors NO Turn OFF the power supply and then wait for a period of 10 minutes Some connectors are dis...

Page 229: ...een U V W phases of the fan motor power supply cable has lost balance or short circuit is caused between U V W phases Check for the connector power supply cable of the fan motor NO CHECK 16 Replace the fan PCB A4P A5P YES The HAP lamp on the inverter PCB blinks but does not blink on the fan PCB Replace the relevant fan motor YES Signal cable has caused short circuit between Vcc and Gnd and between...

Page 230: ...hooting There are foreign matter around the applicable fan Remove the foreign matter YES Check for the connections of all fan motor connectors 1 NO Turn OFF the power supply and then wait for a period of 10 minutes Some connectors are disconnected Insert the connector YES NO NO There is a relay connection error Correct the connection of the relay harness YES Caution Be sure to turn off the power s...

Page 231: ... 1 MΩ Replace the relevant fan motor YES NO YES Resistance between U V W phases of the fan motor power supply cable has lost balance or short circuit is caused between U V W phases Check for the connector power supply cable of the fan motor NO CHECK 16 Replace the fan PCB A5P A6P YES The HAP lamp on the fan PCB does not blink Turn ON the power supply to check for the HAP lamps on the fan PCB Repla...

Page 232: ...ormal Investigate external causes other than failures e g noise YES NO Connector for the electronic expansion valve of the outdoor unit main PCB A1P is connected Properly and securely connect the connector NO YES Replace the electronic expansion valve NO Replace the outdoor unit main PCB A1P YES Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may...

Page 233: ...normally high i e 135 C 275 F or more When discharge pipe temperature sharply rises remains at 120 C 248 F or more for a period of consecutive 10 minutes When compressor surface temperature becomes abnormally high i e 120 C 248 F or more When compressor surface temperature sharply rises remains at 115 C 239 F or more for a period of consecutive 10 minutes Supposed Causes Abnormal discharge pipe te...

Page 234: ...surface temperature or compressor surface temperature Connect the Service Checker Reset the system operation and then restart it CHECK 11 Are the characteristics of the discharge pipe and compressor surface temperature thermistors normal 1 All thermistors are normal and temperature detection with the control PCB is also normal The discharge pipe temperature or compressor surface temperature has re...

Page 235: ...sure service port Reset the operation and then restart the operation Stop the relevant indoor units while the system is in cooling operation and then check for the liquid pipe temperature of these indoor units after the system is stabilized The liquid pipe temperature is low equivalent to the evaporating temperature Clean the air filters of the indoor units NO YES NO Replace the indoor unit electr...

Page 236: ...Refrigerant overcharged Disconnection of outdoor air thermistor Disconnection of heat exchanger deicer thermistor Disconnection of liquid pipe temperature thermistor Troubleshooting Refer to page 294 Check for the conditions of mounting of the temperature sensors of the outdoor air thermistor the heat exchanger thermistor and liquid pipe thermistor to the piping Disconnect the outdoor air thermist...

Page 237: ...stops running Supposed Causes Defective connection of jumpers between PCB Defective outdoor unit main PCB A1P Defective inverter PCB Troubleshooting Check for the transmission conditions of the following harnesses 1 X6A Inverter PCB X28A A1P 2 X63A Inverter PCB X40A A1P Replace the outdoor unit main PCB A1P Replace the inverter PCB RXLQ TATJU RXLQ TAYDU A3P RXLQ TAYCU RXYQ TAYCU A4P YES NO YES Com...

Page 238: ...ve inverter PCB A3P Troubleshooting Refer to page 299 Properly connect the connector NO YES Replace the fan motor NO YES Turn OFF the power supply Check for fan motor applicable to the error code H7 while in monitor mode Sub code H7 01 05 Fan motor 1 M1F Master Slave 1 H7 02 06 Fan motor 2 M2F Master Slave 1 Check for the connector of the fan motor Replace the fan PCB A4P A5P Caution Be sure to tu...

Page 239: ...e relevant fan motor NO YES Check for fan PCB applicable to the error code H7 while in monitor mode H7 21 23 25 Fan PCB A6P Master Slave 1 Slave 2 H7 22 24 26 Fan PCB A5P Master Slave 1 Slave 2 Replace the fan PCB 1 Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Is the connector of relevant fan motor normally connected 1 Resistanc...

Page 240: ...es wiring disconnection or short circuit in it Supposed Causes Defective connection of thermistor Defective thermistor Defective outdoor unit PCB Troubleshooting Thermistor is connected to the connector Replace the outdoor unit main PCB A1P Connect the connector and turn ON again NO NO Replace the thermistor 1 YES YES Caution Be sure to turn off the power switch before connecting or disconnecting ...

Page 241: ...e thermistor R10T X29A Group connector J6 Heat exchanger deicer thermistor R11T X15A Group connector Heat exchanger gas pipe thermistor R8T R9T X29A Group connector J7 Receiver inlet thermistor R3T X30A Group connector Subcooling heat exchanger liquid pipe thermistor R7T Subcooling injection thermistor R16T X15A Group connector J8 Heat exchanger liquid pipe thermistor R4T R5T X30A Group connector ...

Page 242: ... 297 Are the characteristics of the high pressure sensor normal Make a comparison between voltage characteristics and gauge pressure Replace the high pressure sensor S1NPH Replace the outdoor unit main PCB A1P NO Is the PCB detection pressure normal Make a comparison between data on pressure checked by the Service Checker and the voltage characteristics Replace the outdoor unit main PCB A1P NO Are...

Page 243: ...Are the characteristics of the low pressure sensor normal Make a comparison between voltage characteristics and gauge pressure Replace the low pressure sensor S1NPL Replace the outdoor unit main PCB A1P NO Is the PCB detection pressure normal Make a comparison between data on pressure checked by the Service Checker and the voltage characteristics Replace the outdoor unit main PCB A1P NO Are the ch...

Page 244: ...ted during the output of waveform before compressor startup Detect according to current value detected with the current sensor during synchronous operation for startup Error Decision Conditions When overcurrent OCP flows during the output of waveform When the current sensor error during synchronous operation When IPM error occurs Supposed Causes Inverter PCB IPM failure Current sensor failure Driv...

Page 245: ... resulted from external factors other than failures e g external noise or thunder YES Replace the compressor and the inverter PCB together 1 Replace the inverter PCB 1 NO NO YES Replace the inverter PCB 1 and the fan PCB 2 Replace the inverter 1 PCB NO YES Turn OFF the power supply once and then turn it ON again NO YES Caution Be sure to turn off the power switch before connecting or disconnecting...

Page 246: ...detection circuit on the outdoor unit main PCB Supposed Causes Defective wiring Defective outdoor unit main PCB Troubleshooting Error recurs after turning OFF the power and ON again Any disconnection of connectors loose contact or wiring disconnection in the transmission wirings to the outdoor unit main PCB NO YES YES NO Temporary problem Correct any fault Replace the outdoor unit main PCB A1P Cau...

Page 247: ...ctor surface thermistor is more than the specified temperature Supposed Causes Defective connection of harness Defective reactor surface thermistor Defective inverter PCB Troubleshooting Is reactor harness connected to the terminal strip correctly Is the wiring disconnection in the reactor surface thermistor NO YES YES NO Connect the harness correctly Replace the thermistor Replace the inverter PC...

Page 248: ...ll outdoor unit models Method of Error Detection Detect temperature of power module of the inverter PCB Error Decision Conditions Thermistor located inside the power module of the inverter PCB for compressor and fan motor Cooling tube plate poor heat exchange Supposed Causes Cooling tube plate not fixed with screws U0 error Defective inverter PCB High outdoor air temperature Incorrect power supply...

Page 249: ...XYQ TAYCU A4P Connect to power supply within 10 of the rated voltage NO YES Rectify troubles Normal Power OFF NO NO Check for the cooling conditions of cooling tube used to cool the inverter 1 Is the cooling tube plate fixed with screws 2 Error code U0 is displayed on the Error History screen Reinsert the connectors X7A and X8A for fin thermistors R71T R72T on the inverter PCB A3P correctly YES YE...

Page 250: ...plate not fixed with screws U0 error Defective fan PCB High outdoor air temperature Troubleshooting Continue operation Field factor Radiation fin temperature may have risen due to high outdoor air temperature Turn ON the power supply and then press the ON button Does the error recur Replace the fan PCB A5P A6P YES Rectify troubles Normal NO Check for the cooling conditions of radiation fin used to...

Page 251: ...ive diode bridge High outdoor air temperature Troubleshooting Turn ON the power supply and check if the error recurs when operation starts Turn ON the power supply and check if the error recurs when operation starts Troubleshooting is finished Replace the diode bridge V1R If the problem recurs replace the inverter PCB A3P YES Continue operation Field factor Radiation fin temperature may have risen...

Page 252: ...oubleshooting Compressor inspection Power OFF Open the stop valve YES NO Is the stop valve open YES YES Are wiring and wire connections to the relevant compressor normal Rectify the wiring and wire connections NO Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Are the leads of the relevant compressor normal Replace the leads of the...

Page 253: ...operation Replace the compressor NO YES Replace the inverter PCB YES Restarting the system results in the recurrence of the error Continue operation The error could have resulted from causes such as instantaneous power failure NO Replace the inverter PCB RXLQ TATJU RXLQ TAYDU A3P RXLQ TAYCU RXYQ TAYCU A4P NO CHECK 4 Is the power transistor normal Power OFF A CHECK 4 ...

Page 254: ...hooting Power OFF Open the stop valve YES NO Is the stop valve open YES YES Are wiring and wire connections to the relevant compressor normal Rectify the wiring and wire connections NO Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Are the leads of the relevant compressor normal Replace the leads of the relevant compressor NO A Ch...

Page 255: ...nect to power supply within 10 of the rated voltage NO NO Pressure equalization failure Check the refrigerant system Power supply voltage falls within 10 of the rated voltage YES YES Replace the inverter PCB Restarting the system results in the recurrence of the error Continue operation The error could have resulted from causes such as instantaneous power failure NO NO A YES Replace the inverter P...

Page 256: ...CB Troubleshooting YES NO NO Apply power and then restart operation NO Are the leads of the compressor disconnected Connect the leads of the compressor YES Is the insulation resistance of the relevant compressor 100 kΩ or more Eliminate the melting state of refrigerant NO YES YES YES Refrigerant is melting No power applied for a period of 6 hours or more Eliminate the melting state of refrigerant ...

Page 257: ...TAYDU A3P RXLQ TAYCU RXYQ TAYCU A4P NO YES NO There is wiring disconnection in the compressor Replace the compressor YES Is the insulation resistance of the relevant compressor 100 kΩ or more Refrigerant is melting No power applied for a period of 6 hours or more Replace the compressor NO Eliminate the melting state of refrigerant YES CHECK 4 Is the power transistor normal A CHECK 4 ...

Page 258: ...ain PCB transmission block Defective noise filter inverter compressor or fan motor External factors e g noise Failure of inverter PCB or fan PCB Troubleshooting Does the inverter PCB part No match that of the spare parts list Replace with a proper PCB NO Properly connect the connector NO YES Replace the fan motor YES NO Go to the next page The insulation resistance of the relevant inverter compres...

Page 259: ...it main PCB A1P is blinking Properly connect the connector NO YES Is the connector between the outdoor unit main PCB and the sub PCB securely connected Properly connect the connector X9A X10A on the sub PCB option NO Is the normal operation indication LED on the sub PCB blinking YES NO Replace the outdoor unit main PCB A1P YES The fuse of the noise filter PCB has blown out Continue operation The e...

Page 260: ...alance through PCB Error Decision Conditions When power supply voltage imbalance exceeds approximately 12 V Error is not decided while the unit operation is continued P1 will be displayed by pressing the inspection button Supposed Causes Open phase Interphase voltage imbalance Defective capacitor in the main circuit Defective inverter PCB Defective magnetic relay Defective wiring in the main circu...

Page 261: ...wn or loose contact of magnetic relay 3 Wiring disconnection in or loose contact of noise filter Replace the inverter PCB RXLQ TATJU RXLQ TAYDU A3P RXLQ TAYCU RXYQ TAYCU A4P YES Explanation to users Use the document Notice of Inspection Results attached to spare part Hand the Notice of Inspection Results to user to ask him her to rectify the imbalance Be sure to explain user that power supply volt...

Page 262: ...nection of thermistor Defective reactor surface thermistor s Defective inverter PCB Troubleshooting Disconnect the thermistors from the inverter PCB A3P and check the resistance NO YES YES NO Correct the connection NO Replace the defective thermistor s YES Replace the inverter PCB A3P Continue operation Caution Be sure to turn off the power switch before connecting or disconnecting connectors or p...

Page 263: ...l be displayed by pressing the inspection button Supposed Causes Defective radiation fin temperature thermistor Defective inverter PCB Defective inverter compressor Defective fan motor Troubleshooting Make measurement of resistance of the radiation fin thermistor Is the resistance of the relevant thermistor normal The insulation resistance of the relevant inverter compressor is not more than 100 k...

Page 264: ...alent to open or short circuit Supposed Causes Defective fan PCB Defective fan motor Troubleshooting The insulation resistance of the relevant fan motor is not more than 1 MΩ Turn ON the power supply Does the error recur NO YES NO YES Replace the fan motor Replace the fan PCB RXLQ TATJU RXLQ TAYDU A4P A5P RXLQ TAYCU RXYQ TAYCU A5P A6P Continue operation Caution Be sure to turn off the power switch...

Page 265: ...hooting Does the inverter PCB part No match that of the spare parts list Does the fan PCB part No match that of the spare parts list Has the DIP switch setting been made properly to replace the outdoor unit main PCB Does the Under Preparation indication lamp H2P on the outdoor unit main PCB turn OFF YES YES NO NO YES YES NO NO Replace with a correct inverter PCB RXLQ TATJU RXLQ TAYDU A3P RXLQ TAYC...

Page 266: ...e value by using pressure gauge in operation 2 Compare the actual measurement value by pressure sensor with the value by the pressure gauge To gain actual measurement value by pressure sensor measure the voltage at the connector between 2 3 and then convert the value into pressure Refer to page 284 Refer to page 297 Is the low pressure 0 1 MPa 14 5 psi or less 1 Is the characteristics of low press...

Page 267: ...s reverse phase or T phase is open phase Supposed Causes Power supply reverse phase T phase open phase Defective outdoor unit main PCB A1P Troubleshooting There is an open phase at the power supply T phase terminal section X1M of the outdoor unit Operation is normal if one phase of power supply line phase is replaced Fix the open phase Requires inspection of field power supply section Reverse phas...

Page 268: ...CB A1P Troubleshooting There is an open phase at the power supply T phase terminal section X1M of the outdoor unit Operation is normal if one phase of power supply line phase is replaced Faulty wiring or wiring disconnection between the outdoor unit main PCB A1P and the open phase protection PCB A10P Fix the open phase Requires inspection of field power supply section Reverse phase Countermeasure ...

Page 269: ... Open phase Defective inverter PCB Defective outdoor unit main PCB Defective compressor Defective main circuit wiring Defective fan motor Defective connection of signal cable Troubleshooting There are some defects in the power supply conditions aforementioned The insulation resistance of the compressor is not more than 100 kΩ NO YES YES Fix the defects Replace the compressor M1C Check for power su...

Page 270: ...everely damaged the compressor and the fan motor may have been damaged Replace the inverter PCB If the inverter PCB gets severely damaged check for the compressor Continue operation The error could have resulted from causes such as instantaneous power failure A Is the power transistor normal YES NO Replace the inverter PCB RXLQ TATJU RXLQ TAYDU A3P RXLQ TAYCU RXYQ TAYCU A4P Connect and disconnect ...

Page 271: ...b code and then go to the following Conduct the test operation The test operation has not been conducted U3 03 Check for the refrigerant piping and then conduct the test operation U3 04 Conduct the test operation due to the premature end of the test operation U3 05 Conduct the test operation due to the premature end of the test operation U3 06 Check for transmission between indoor and outdoor unit...

Page 272: ...ror Detection Microcomputer checks if transmission between indoor and outdoor units is normal Error Decision Conditions When transmission is not carried out normally for a certain amount of time Supposed Causes Short circuit in indoor outdoor or outdoor outdoor transmission wiring F1 F2 or wrong wiring Outdoor unit power supply is OFF System address does not match Defective indoor unit PCB Defecti...

Page 273: ...Disconnect the outdoor outdoor transmission wiring Does the system normally operate with a single transmission line U4 01 1 OFF ON BLINK SEG1 SEG2 SEG3 1 2 Correct the voltage Replace the fuse Modify the transmission wirings Press and hold BS3 on the outdoor unit main PCB for a period of 5 seconds or more Replace the outdoor unit main PCB A1P Mount the DIII NET extension adaptor YES NO YES YES Rep...

Page 274: ...ccording to relevant error codes NO YES Check controller indoor units 1 Some error about thermistor or fan motor electronic expansion valve or defective PCB 2 Test operation was interrupted by button BS1 Mode YES Check all indoor error indication NO Operate all indoor units YES Do all units display U9 Carry out the diagnosis again after a lapse of 2 minutes or more NO Did 2 minutes or more elapse ...

Page 275: ...ain Sub setting Control by 2 remote controllers Main Sub setting of both remote controllers is set to Main All indoor unit PCB microcomputer normal monitors blinking Resets normally when power supply is turned OFF temporarily NO NO NO YES NO Replace the indoor unit PCB Set one of the remote controllers to Sub turn OFF the power supply temporarily then restart operation The error could be produced ...

Page 276: ...ditions When transmission is not carried out normally for a certain amount of time Supposed Causes Connection error of transmission wirings between outdoor unit and external control adaptor for outdoor unit Connection error of transmission wirings between outdoor units Cool Heat selection setting error Cool Heat unified address setting error functional unit external control adaptor for outdoor uni...

Page 277: ...tor is mounted Error code Sub code Error code Sub code Error code Sub code Error code Sub code Error code Sub code Error code Sub code Error code Sub code Error code Sub code Go to Diagnosis Flowchart 3 Transmission error between master and slave 1 Go to Diagnosis Flowchart 4 Transmission error between master and slave 2 Go to Diagnosis Flowchart 5 Multi system error Go to Diagnosis Flowchart 6 Ma...

Page 278: ...or unit Diagnosis Flowchart 1 Supply power to the outdoor unit Is power supplied to the outdoor unit Is the normal operation monitor LED on the outdoor unit main PCB blinking Is the normal operation monitor LED on the external control adaptor for outdoor unit blinking Transmission error when the external control adaptor is mounted Is the power supply cable of the external control adaptor for outdo...

Page 279: ...he error recur when setting Cool Heat selection for the external control adaptor for outdoor unit to IND NO NO NO NO NO NO NO NO YES YES YES YES YES YES YES YES Replace the outdoor unit main PCB A1P Replace the external control adaptor for outdoor unit PCB Connect the power supply cable of the external control adaptor for outdoor unit to the 16 VDC power supply line Replace the outdoor unit main P...

Page 280: ...ssion wirings to multi slave 1 have caused wiring disconnection in them or are being disconnected Modify the outdoor unit multi transmission wirings and then reset the power supply Replace the outdoor unit main PCB A1P for multi slave 1 Modify the outdoor unit multi transmission wirings and then reset the power supply Diagnosis Flowchart 3 Transmission error between master and slave 1 Error code S...

Page 281: ...Replace the outdoor unit main PCB A1P Replace the outdoor unit main PCB A1P Rectify the error in the connection of transmission wirings and then reset the power supply One of outdoor unit multi transmission wirings has caused wiring disconnection in it or been disconnected NO The capacity to connect indoor units falls within the specified range Check the capacity to connect indoor units Diagnosis ...

Page 282: ...ission error between main and sub remote controller Connection between sub remote controllers Defective remote controller PCB Troubleshooting Refer to page 32 for Main Sub setting Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Main Sub setting of both remote controllers is set to Sub Main Sub setting of the remote controller is se...

Page 283: ... outdoor units Defective electronic expansion valve of other indoor unit Defective indoor unit PCB of other indoor unit Improper connection of transmission wiring between indoor and outdoor unit Troubleshooting U9 has been displayed for 2 minutes or more The outdoor unit PCB indicated by the error code U9 is normal Check for the indoor unit of other system and then conduct troubleshooting by diagn...

Page 284: ...type of indoor and outdoor unit Setting of outdoor unit PCB was not carried out after replacing to spare PCB Troubleshooting Ensure the sub code or the lamp display of monitor mode and then go to the following Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Go to Diagnosis Flowchart 1 Connection of excess indoor units Go to Diagnos...

Page 285: ...A1P Refer to Incorrect electric heater capacity setting troubleshooting 1 Excess indoor units are connected Check for the connection to connect the proper number of indoor units NO Diagnosis Flowchart 1 UA 17 Error code Sub code NO Is the model of indoor unit FXTQ YES NO YES Check if the refrigerant type of the outdoor unit corresponds to that of the indoor unit Replace the outdoor unit main PCB A...

Page 286: ... NO NO Replace the outdoor unit main PCB A1P Check for the model of outdoor unit Make setting again and then reset the power supply Replace the spare PCB NO YES Replace the outdoor unit main PCB A1P Was the outdoor unit PCB replaced with a spare PCB A different model of outdoor unit is connected YES Replace the outdoor unit main PCB A1P Diagnosis Flowchart 3 Error code Sub code UA 20 Multi connect...

Page 287: ... system setup Check if system is heat pump or heat recovery Diagnosis Flowchart 5 Is there any branch selector unit connected NO Was the outdoor unit PCB replaced with a spare PCB Replace the outdoor unit main PCB A1P YES YES NO Is the procurement of the spare PCB proper Procure a proper spare PCB Error code Sub code UA 29 ...

Page 288: ...NO Correct the multi combination of outdoor units Diagnosis Flowchart 6 Is the multi combination of outdoor units proper NO Was the outdoor unit PCB replaced with a spare PCB Replace the outdoor unit main PCB A1P YES YES YES YES NO Is the procurement of the spare PCB proper Procure a proper spare PCB Is the setting of the spare PCB proper Error code Sub code UA 35 ...

Page 289: ...applicable value Operation After Error Codes Decided The error code UA 17 is displayed on the remote controller Indoor units can operate continuously Incorrect setting is kept Even if the ON condition for electric heater 2 is established only electric heater 1 will be set to ON Electric heater 1 set to ON electric heater 2 set to OFF In order to deliver in terms of user friendliness and safety the...

Page 290: ... that of its own on any other indoor unit Error Decision Conditions The error decision is made as soon as the abnormality aforementioned is detected Supposed Causes Address duplication of centralized control equipment Defective indoor unit PCB Troubleshooting Make setting change so that the centralized address will not be duplicated The centralized address is duplicated Caution Be sure to turn off...

Page 291: ...ntral control group No be made in one and the same refrigerant system Has the setting of central control group No been made with the indoor unit on which the UE occurred Can the setting of central control group No be made Check the indoor unit for which UE is displayed Is the transmission error UE caused on all indoor units Was the central control group No for indoor unit changed Make correct sett...

Page 292: ...d control equipment Centralized control equipment Normal OK Correct the wiring NG A NO Correct the wiring NG YES YES Disconnect the transmission wiring of the main centralized control equipment and then check the voltage between the transmission terminals F1 and F2 of the master unit transmission equipment using a multimeter It is supposed that the error results from external factors e g noises fr...

Page 293: ...ransmission wiring between indoor outdoor units and outdoor outdoor units Failure to execute check operation Defective indoor unit PCB Stop valve is not opened Troubleshooting Is indoor outdoor and outdoor outdoor unit transmission wiring normal Is indoor outdoor and outdoor outdoor unit transmission wiring normal Replace the indoor unit PCB Wiring check operation may not have been carried out suc...

Page 294: ...ll outdoor unit models Method of Error Detection Detect an indoor unit with no auto address setting Error Decision Conditions The error decision is made as soon as the abnormality aforementioned is detected Supposed Causes Improper connection of transmission wiring between indoor outdoor units and outdoor outdoor units Defective indoor unit PCB Defective outdoor unit main PCB A1P ...

Page 295: ...em Disconnect the outdoor outdoor unit transmission wiring to create the one system status and then check whether or not the system is normal NO YES YES After fixing incorrect wiring press and hold the RESET button on the master outdoor unit PCB for 5 seconds Normal NO YES NO Normal NO Does an error occur Mount the DIII NET extension adaptor YES NO YES NO YES Replace the indoor unit PCB Replace th...

Page 296: ...e service monitor PCB Including capacity setting High airflow passage resistance Dirty filter Obstacle Excessiverefrigerantcharging Improper model selection In heating Check to be sure the stop valve is open Conduct visual checks for pipe conditions Is there any temperature difference caused before and after the filter or branch pipe Are the coil resistance and insulation normal Are the electrical...

Page 297: ...mal piping length Bent or crashed pipe Cloggingofforeignmaterials Stop valve closed Less circulation quantity of refrigerant Degradation in evaporating capacity Refrigerant shortage Moisture choke Dirty evaporator Decreased airflow rate Decreased fan output Defective fan motor Can the fan motor be rotated with hands Are the motor coil resistance and insulation normal If a spare PCB is installed is...

Page 298: ...open Defective discharge pipe temperature control Defective hot gas bypass control Hot gas circuit clogging Defective solenoid valve coil Defective solenoid valve body Defective main PCB Defective main PCB Defective valve coil Defective low pressure sensor Defective subcooling heat exchanger outlet thermistor Defective valve body Defective subcooling electronic expansion valve control Superheat du...

Page 299: ... mode in the x1 kΩ range When using the digital type of multimeter make measurement in diode check mode No Measuring point Judgement criteria Remarks No Measuring point Judgement criteria Remarks 1 P4 U 2 30 kΩ 1 P4 U 1 2 V or more Due to condenser charge and so on resistance measurement may require some time 2 P4 V 2 P4 V 3 P4 W 3 P4 W 4 U P4 15 kΩ or more including Due to condenser charge and so...

Page 300: ...ement criteria Remarks 1 P31 U 2 30 kΩ 1 P31 U 1 2 V or more Due to condenser charge and so on resistance measurement may require some time 2 P31 V 2 P31 V 3 P31 W 3 P31 W 4 U P31 15 kΩ or more including Due to condenser charge and so on resistance measurement may require some time 4 U P31 0 3 0 7 V 5 V P31 5 V P31 6 W P31 6 W P31 7 N31 U 7 N31 U 8 N31 V 8 N31 V 9 N31 W 9 N31 W 10 U N31 2 30 kΩ 10...

Page 301: ...teria Remarks 1 P21 U 2 30 kΩ 1 P21 U 1 2 V or more Due to condenser charge and so on resistance measurement may require some time 2 P21 V 2 P21 V 3 P21 W 3 P21 W 4 U P21 15 kΩ or more including Due to condenser charge and so on resistance measurement may require some time 4 U P21 0 3 0 7 V 5 V P21 5 V P21 6 W P21 6 W P21 7 N5 U 7 N5 U 8 N5 V 8 N5 V 9 N5 W 9 N5 W 10 U N5 2 30 kΩ 10 U N5 1 2 V or m...

Page 302: ...emarks 1 P31 U 2 30 kΩ 1 P31 U 1 2 V or more Due to condenser charge and so on resistance measurement may require some time 2 P31 V 2 P31 V 3 P31 W 3 P31 W 4 U P31 15 kΩ or more including Due to condenser charge and so on resistance measurement may require some time 4 U P31 0 3 0 7 V 5 V P31 5 V P31 6 W P31 6 W P31 7 N31 U 7 N31 U 8 N31 V 8 N31 V 9 N31 W 9 N31 W 10 U N31 2 30 kΩ 10 U N31 1 2 V or ...

Page 303: ...t Judgement criteria Remarks No Measuring point Judgement criteria Remarks 1 P31 U 2 30 kΩ 1 P31 U 1 2 V or more Due to condenser charge and so on resistance measurement may require some time 2 P31 V 2 P31 V 3 P31 W 3 P31 W 4 U P31 15 kΩ or more including Due to condenser charge and so on resistance measurement may require some time 4 U P31 0 3 0 7 V 5 V P31 5 V P31 6 W P31 6 W P31 7 N31 U 7 N31 U...

Page 304: ...e Low pressure Frequency High pressure gradually rises with increase in frequency Subcooling degree becomes higher Liquid connection pipe temperature lowers Low pressure rises due to decreased compressor output High pressure Low pressure Frequency Heating The outdoor unit electronic expansion valve is closed due to the overload control Frequency comes to the minimum level Highpressure is maintaine...

Page 305: ...e minimum level Fan control is activated for high pressure protection under cooling control at low outdoor air temperature i e the fan is hunting at high pressure High pressure drops with decrease in compressor capacity If frequency comes to the minimum level low pressure cannot be maintained Low pressure rises as the opening degree of the indoor unit electronic expansion valve becomes larger Freq...

Page 306: ... 1 hour or more and then check to be sure that the vacuum gauge reading does not rise If the reading rises moisture may have remained in the system or refrigerant leakage may have been caused 3 Additional refrigerant charge Purge air from the manifold gauge connection hoses and then charge a necessary amount of refrigerant Special vacuuming and dehydration In case of moisture may get mixed in the ...

Page 307: ... Type J FXMQ M FXHQ M FXAQ P FXLQ M FXNQ M FXTQ TA Type A FXMQ MF Type B Type J Type J Thermistor Thermistor type R1T Outdoor air Type E R21T Discharge pipe Type H R3T Receiver inlet Type L R4T Heat exchanger liquid pipe upper R5T Heat exchanger liquid pipe lower R6T Subcooling heat exchanger gas pipe R7T Subcooling heat exchanger liquid pipe R8T Heat exchanger gas pipe upper Type A R9T Heat excha...

Page 308: ... 44 31 4796 31 51 31 41 20 68 24 95 25 0060 25 02 24 98 25 77 19 94 20 0000 20 00 20 00 30 86 16 04 16 1008 16 10 16 12 35 95 12 99 13 0426 13 04 13 07 40 104 10 58 10 6281 10 63 10 67 45 113 8 669 8 7097 8 711 8 757 50 122 7 143 7 1764 7 179 7 227 55 131 5 918 5 9407 5 997 60 140 4 928 4 9439 5 001 65 149 4 123 4 1352 4 191 70 158 3 467 3 4757 3 528 75 167 2 9349 2 984 80 176 2 4894 2 534 85 185 ...

Page 309: ... 0697 13 1222 12 99 12 65 40 104 10 6490 106 1517 10 7042 10 58 10 31 45 113 8 7269 87 0725 8 7834 8 669 8 447 50 122 7 1905 71 7703 7 2479 7 143 6 962 55 131 5 9524 59 4735 6 0131 5 918 5 769 60 140 4 9536 49 5180 5 0144 4 928 4 805 65 149 4 1434 41 4168 4 2021 4 123 4 021 70 158 3 4825 34 7923 3 5381 3 467 3 381 75 167 2 9407 29 3499 2 9925 2 928 2 856 80 176 2 4943 24 8586 2 5420 2 484 2 422 85...

Page 310: ...5 3 3 5 4 VDC kg cm2 psi MPa PH PL PH MPa VH 0 5 PL MPa VL 0 5 PH High pressure MPa PL Low pressure MPa VH Output Voltage High Side VDC VL Output Voltage Low Side VDC 4 15 3 0 4 15 3 0 1 7 3 0 1 7 3 0 1 MPa 145 psi 725 653 580 508 435 363 290 218 145 72 5 0 5 V 4 3 2 1 Red Black White Connector for high pressure sensor Red High pressure sensor Microcomputer A D input Make measurement of DC voltage...

Page 311: ...hecking indoor outdoor unit transmission wiring for broken wires for checking the indoor outdoor unit transmission wiring of the Outdoor Unit C for broken wires Turn OFF the power supply to all equipment short circuit between the indoor outdoor unit terminal F1 and F2 in the Outdoor Unit C and then conduct continuity checks between the transmission wirings F1 and F2 of the Indoor Unit a that is fa...

Page 312: ...only 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 connectors 5 core wire to check that the values are balanced within the range of 20 while connector or relay connector is disconnected Furthermore to use a multimeter for measurement connect the probe of negative pole to Vcc and that of positive pole to GND CHECK 1...

Page 313: ...and measure the resistance Outdoor unit Y1E Y3E Y4E Outdoor unit Y6E Y7E Outdoor unit Y2E Y5E FXFQ T FXFQ P FXZQ TA FXUQ P FXEQ P FXSQ TA CHECK 18 Measuring points 1 6 2 6 3 6 4 6 120 180 Ω 35 55 Ω White 1 Yellow 2 Orange 3 Blue 4 5 Red 6 Judgement criteria Y1E Y3E Y4E Measuring points 1 5 2 5 3 5 4 5 Judgement criteria 120 180 Ω White 1 Yellow 2 Orange 3 Blue 4 Red 5 Measuring points 1 6 2 6 3 6 ...

Page 314: ...Q MF White 1 Yellow 2 Orange 3 Blue 4 Red 5 Brown 6 Measuring points White Orange White Red Yellow Blue Yellow Brown Judgement criteria 300 Ω 150 Ω 300 Ω 150 Ω Orange White Yellow Red Brown Blue Measuring points White Orange White Red Yellow Blue Yellow Brown Judgement criteria 300 Ω 150 Ω 300 Ω 150 Ω ...

Page 315: ...SiUS341802E Appendix 302 Part 7 Appendix 1 Wiring Diagrams 303 1 1 Outdoor Unit 303 1 2 Indoor Unit 308 1 3 Air Treatment Equipment 316 ...

Page 316: ...Wiring Diagrams SiUS341802E 303 Appendix 1 Wiring Diagrams 1 1 Outdoor Unit RXLQ72TATJU 2D112580A ...

Page 317: ...SiUS341802E Wiring Diagrams Appendix 304 RXLQ96 120TATJU 2D112581A ...

Page 318: ...Wiring Diagrams SiUS341802E 305 Appendix RXLQ72TAYDU 2D112582A ...

Page 319: ...SiUS341802E Wiring Diagrams Appendix 306 RXLQ96 120TAYDU 2D112583A ...

Page 320: ...Wiring Diagrams SiUS341802E 307 Appendix RXLQ72 96 120TAYCU RXYQ72 96 120 144 168TAYCU 2D112579A ...

Page 321: ...ICEXPANSIONVALVE FERRITE CORE NOISE FILTER POWERSUPPLYCIRCUIT A1P A2P CONNECTOR FOR OPTIONAL PARTS CONNECTOR SELFCLEANPANEL CONNECTOR ADAPTOR FOR WIRING CONNECTOR POWERSUPPLYFORADAPTOR CONNECTOR SELFCLEANPANEL M4S M1S CONTROL BOX NOTE 8 INPUT FROM OUTSIDE NOTE 3 TRANSMISSION WIRING NOTE 2 CENTRAL REMOTE CONTROLLER WIRED REMOTE CONTROLLER OPTIONAL ACCESSORY t R1T t t POWER SUPPLY 1 208 230V 60Hz 1 ...

Page 322: ...B 5A 250V LIGHT EMITTING DIODE SERVICE MONITOR GREEN MAGNETIC RELAY M1P MOTOR INDOOR FAN MOTOR DRAIN PUMP MOTOR SWING FLAP THERMISTOR AIR THERMISTOR COIL LIQUID THERMISTOR COIL GAS FLOAT SWITCH DIODE BRIDGE TERMINAL STRIP TERMINAL STRIP ELECTRONIC EXPANSIONVALVE FERRITE CORE NOISE FILTER POWER SUPPLY CIRCUIT CONNECTOR FOR OPTIONAL ACCESSORIES CONNECTOR ADAPTOR FOR WIRING CONNECTOR GROUP CONTROL AD...

Page 323: ... OFF CONTROL OPERATION CAN BE SELECTED BY REMOTE CONTROLLER IN DETAILS REFER TO THE INSTALLATION MANUAL ATTACHED TO THE UNIT 5 SYMBOLS SHOW AS FOLLOWS RED RED BLK BLACK WHT WHITE YLW YELLOW PNK PINK ORG ORANGE GRN GREEN BLU BLUE 6 CLASS 2 WIRE 3D080350C INDOOR UNIT R2T R3T T2 PNK S1L POWER SUPPLY INDOOR UNIT WHT T1 GRN t t X2M A1P YLW F2 V1R NE F1U C105 L1 RED X15A X18A X17A F1 ORG Z1F X30A L2 WHT...

Page 324: ...OR DRAIN PUMP THERMAL PROTECTOR M1F EMBEDDED THERMISTOR AIR THERMISTOR COIL 1 THERMISTOR COIL 2 FLOAT SWITCH TRANSFORMER 208 230V 25V PHASE CONTROL CIRCUIT TERMINAL BLOCK TERMINAL BLOCK ELECTRONIC EXPANSION VALVE NOISE FILTER FERRITE CORE CONNECTOR FOR OPTIONAL PARTS CONNECTOR ADAPTOR FOR WIRING CONNECTOR WIRING ADAPTOR FOR ELECTRICAL APPENDICES NOTES 1 TERMINAL CONNECTOR 2 FIELD WIRING 3 IN CASE ...

Page 325: ...V1R V2R X1M X2M Y1E Z1C Z2C Z3C Z1F X28A X33A X35A X38A THERMISTOR GAS THERMISTOR DISCHARGE AIR THERMISTOR NTC CURRENT LIMITING FLOAT SWITCH DIODE BRIDGE A1P A2P POWER MODULE TERMINAL BLOCK POWER SUPPLY TERMINAL BLOCK CONTROL ELECTRONIC EXPANSION VALVE FERRITE CORE NOISE FILTER A1P A2P CONNECTOR FOR OPTIONAL ACCESSORIES CONNECTOR POWER SUPPLY FOR WIRING CONNECTOR ADAPTOR FOR WIRING CONNECTOR POWER...

Page 326: ...XPANSION VALVE CONNECTOR FOR OPTIONAL PARTS CONNECTOR FLOAT SWITCH CONNECTOR WIRING ADAPTOR FOR ELECTRICAL APPENDICES 3D065414D POWER SUPPLY A3P A2P A1P X2A H1P SS1 BS1 H2P H3P SS2 X23A X1M H4P X1A X1A R3T R2T R1T L2 L1 t t t WHT RED A1P X13A X12A X8A X11A X31A NOTES NOTE 8 F1U X18A HAP PNK X3A T2 T2 WHT T1 T1 YLW F2 F2 X30A ORG F1 t V1TR F1 X1A BLU P2 P2 BLK P1 T1R P1 KAR KPR X2M X27A X23A X9A X2...

Page 327: ...BRN BROWN BLU BLUE 4 WHEN CONNECTING THE INPUT WIRES FROM OUTSIDE FORCED OFF OR ON OFF CONTROL OPERATION CAN BE SELECTED BY REMOTE CONTROLLER IN DETAILS REFER TO THE INSTALLATION MANUAL ATTACHED TO THE UNIT 5 REMOTE CONTROLLER MODEL VARIES ACCORDING TO THE COMBINATION SYSTEM CONFIRM ENGINEERING DATA AND CATALOGS ETC BEFORE CONNECTING 6 CONFIRM THE METHOD OF SETTING THE SELECTOR SWITCH SS1 SS2 OF W...

Page 328: ...H VOLTAGE FIELD JUNCTION TERMINAL PLUG CONNECTION EQUIPMENT GND FIELD GROUND X1A X3A X38A BS1 X12A X13A HAP X8A INDOOR UNIT PCB THERMISTOR HEAT EXCHANGER 1 2 MPU MULTI TENANT OPTION EEV COIL M K1R K3R TB6 TB8 K2R HEATER KIT OUTPUT LEARN PS TB5 TB4 ACC OUT RELAY OUT 4 3 6 5 9 8 7 10 11 12 RD BK RD BK WH BR BL BL RD FLASH WRITER OR GY RD YL BK PU YL SEE NOTE 5 TO HEATER KIT BK GR GROUND LUG CONNECTI...

Page 329: ...SiUS341802E Wiring Diagrams Appendix 316 1 3 Air Treatment Equipment 1 3 1 Outdoor Air Processing Unit FXMQ48 72 96MFVJU 3D065426D ...

Page 330: ...Wiring Diagrams SiUS341802E 317 Appendix 1 3 2 Energy Recovery Ventilator VAM Series VAM300 470 600GVJU 3D073269C ...

Page 331: ...SiUS341802E Wiring Diagrams Appendix 318 VAM1200GVJU 3D073270C ...

Page 332: ...Revision History Month Year Version Revised contents 04 2018 SiUS341802E First edition ...

Page 333: ... unauthorized parts and accessories or improper installation of parts and accessories can result in water or refrigerant leakage electrical shock fire or explosion z Read the user s manual carefully before using this product The user s manual provides important safety instructions and warnings Be sure to follow these instructions and warnings If you have any inquiries please contact your local imp...

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