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62 Outside Unit
Test Run
System is turned off by outdoor unit Inverter
Compressor High Discharge Temperature
System is turned off by excessive increase of high
pressure of outdoor unit
System is turned off by excessive decrease of low
pressure of outdoor unit
Pressure ratio is under limit
Outdoor Unit Inverter Compressor CT Sensor open or
short
Outdoor Unit Inverter Compressor Discharge
Temperature Sensor open or short
Outdoor Unit Low Pressure Sensor open or short
Outdoor Unit High Pressure Sensor open or short
Outdoor Unit Air Temperature Sensor open or short
Outdoor Unit Heat Exchanger Temperature
Sensor Open or Short
Outdoor Unit Suction Temperature Sensor open or
short
Disconnection or short circuit on IPM temperature sen-
sor of the outdoor unit
Omitting connection of Outdoor unit
Excessive connection of indoor units compared to
capacity of outdoor unit
Failing to receive inverter signal at main PCB of
Outdoor Unit
Failing to receive indoor unit signal at main PCB of out-
door Unit.
Reverse connection or omitting connection of R, S, T
power of Outdoor unit
Restriction of Outdoor Unit (Inverter PCB)
Check EEPROM checksum error when resetting power
When Heat sink temperature is above setting value
Restriction of Outdoor Unit Fan
Instant Over Current(Peak) of Outdoor Unit PFC
Communication Fail Between Outdoor Unit Main
MICOM and EEPROM or omitting EEPROM
Communication Fail Between Outdoor Unit PFC
MICOM and EEPROM or omitting EEPROM
Outdoor Unit Inverter Compressor
High Discharge Temperature
High Pressure of Outdoor Unit
Low Pressure of Outdoor Unit
Low pressure ratio
Outdoor Unit Inverter Compressor
CT Sensor Fault
Outdoor Unit Inverter Compressor
Discharge Temperature Sensor Fault
Outdoor Unit Low Pressure
Sensor Fault
Outdoor Unit High Pressure
Sensor Fault
Outdoor Unit Air Temperature
Sensor Fault
Outdoor Unit Heat Exchanger
Temperature Sensor Fault
Outdoor Unit Suction Temperature
Sensor Fault
Defective IPM Temperature
Sensor
Omitting connection of R, S, T
power of Outdoor unit
Excessive capacity of indoor units
Communication error : inverter
PCB ’ Main PCB
Communication error : indoor unit
’ main PCB of outdoor unit
Reverse connection of R, S, T
power of Outdoor unit
Communication error : inverter
PCB ’ Main PCB
Inverter PCB EEPROM error
Heat sink temperature high error
Outdoor Unit Fan Lock
Instant Over Current(Peak) of
Outdoor Unit PFC
Outdoor Unit Main PCB EEPROM
Error
PFC PCB EEPROM Error
Outdoor Unit Liquid pipe
Temperature Sensor Error
Outdoor Unit Subcooling Outlet
Temperature Sensor Error
Failure of operation mode conver-
sion at Outdoor Unit
Network error
Liquid pipe temperature sensor of outdoor unit is open
or short
Outdoor Unit Subcooling Outlet Temperature Sensor
open or short
Pressure unbalance between outdoor units
Network error of central control unit
Display Title Cause of Error
321
341
351
401
361
411
421
431
441
451
461
491
501
511
521
531
541
571
601
621
671
731
861
881
11 31
11 51
15 11
24 21
Outdoor unit related error
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