78
Outdoor Unit
78
Outdoor Unit
Test Run
Failing to receive Slave Unit signal at main PCB of
Master outdoor unit
Failing to receive master and other Slave Unit signal at
main PCB of slave outdoor unit
Failing to receive fan signal at main PCB of master
unit.
Failing to receive fan signal at main PCB of slave unit.
Instant Over Current at Master Outdoor Unit Fan IPM
Instant Over Current at slave Outdoor Unit Fan IPM
Master Outdoor Unit Fan DC Link Input Voltage is
under 380V
slave Outdoor Unit Fan DC Link Input Voltage is under
380V
Liquid pipe temperature sensor of Master outdoor unit
is open or short
Liquid pipe temperature sensor of slave outdoor unit is
open or short
Master Outdoor Unit Subcooling Inlet Temperature
Sensor open or short
slave Outdoor Unit Subcooling Inlet Temperature
Sensor open or short
Master Outdoor Unit Subcooling Outlet Temperature
Sensor open or short
slave Outdoor Unit Subcooling Outlet Temperature
Sensor open or short
Pressure unbalance between outdoor units
Pressure unbalance between outdoor units
Comp locking, Check Valve leakage, comp dielectric
break down at Master Outdoor Unit
Comp locking, Check Valve leakage, comp dielectric at
slave Outdoor Unit
Master Outdoor Unit Fan Inverter PCB Temperature is
Over 95°C
slave Outdoor Unit Fan Inverter PCB Temperature is
Over 95°C
Master Outdoor Unit Fan PCB Heat Sink Temperature
Sensor open or short
slave Outdoor Unit Fan PCB Heat Sink Temperature
Sensor open or short
Communication Error Between
Master Outdoor Unit and Other
Outdoor Unit
Communication Error Between
slave Outdoor Unit and Other
Outdoor Unit
Master Outdoor Unit Fan PCB
Communication Error
slave Outdoor Unit Fan PCB
Communication Error
Master Outdoor Unit FAN IPM
Fault Error
slave Outdoor Unit FAN IPM Fault
Error
Master Outdoor Unit Fan DC Link
Low Voltage Error
slave Outdoor Unit Fan DC Link
Low Voltage Error
Master Outdoor Unit Liquid pipe
Temperature Sensor Error
slave Outdoor Unit Liquid pipe
Temperature Sensor Error
Master Outdoor Unit Subcooling
Inlet Temperature Sensor Error
slave Outdoor Unit Subcooling
Inlet Temperature Sensor Error
Master Outdoor Unit Subcooling
Outlet Temperature Sensor Error
slave Outdoor Unit Subcooling
Outlet Temperature Sensor Error
Failure of operation mode conver-
sion at Master Outdoor Unit
Failure of operation mode conver-
sion at slave Outdoor Unit
Master Outdoor Unit Constant
Speed Compressor Fault
slave Outdoor Unit Constant
Speed Compressor Fault
Excessive increase of Master
Outdoor Unit Fan PCB Heat Sink
Temperature
Excessive increase of slave
Outdoor Unit Fan PCB Heat Sink
Temperature
Master Outdoor Unit Fan PCB
Heat Sink Temperature Sensor
Error
slave Outdoor Unit Fan PCB
Heat Sink Temperature Sensor
Error
Display
Title
Cause of Error
1
1 0
4
2
1
1 0
5
2
1
1 0
6
2
1
1 0
7
2
1
1 1
3
2
1
1 1
4
2
1
1 1
5
2
1
1 5
1
2
1
1 7
3
2
1
1 9
3
2
1
1 9
4
2
Outdoor unit related error