Installation Manual 73
ENGLISH
Test Run
Excessive capacity of indoor units
Transmission error : inverter PCB ➡
main PCB
Transmission error : indoor unit ➡
main PCB of outdoor unit
Reverse connection of R, S, T power
of main outdoor unit
Transmission error : main PCB ➡
inverter PCB
Overheat of inverter heatsink
Temperature sensor of fan
Current sensor of inverter compressor is open or short
Discharge temperature sensor of inverter compressor is
open or short
Low pressure sensor of main outdoor unit is open or short
High pressure sensor of main outdoor unit is open or short
Air temperature sensor of main outdoor unit is open or short
Temperature sensor of front-side heat exchanger is open or
short
Suction temperature sensor of main outdoor unit is open or
short
Discharge temperature sensor of the constant speed com-
pressor of main outdoor unit is open or short
Temperature sensor of rear-side heat exchanger is open or
short
Current sensor of inverter compressor
Discharge temperature sensor of
inverter compressor
Low pressure sensor of main outdoor
unit
High pressure sensor of main outdoor
unit
Air temperature sensor of main out-
door unit
Temperature sensor of front-side heat
exchanger
Suction temperature sensor of main
outdoor unit
Discharge temperature sensor of the
constant speed compressor of main
outdoor unit
Temperature sensor of rear-side heat
exchanger
Display Title Cause of Error
4
4
4
4
4
4
4
4
4
0
1
2
3
4
5
6
7
8
5
5
5
5
5
6
6
1
2
3
4
7
2
5
Excessive connection of indoor units compared to capacity of
outdoor unit
Failing to receive inverter signal at main PCB
Failing to receive indoor unit signal at main PCB of outdoor
unit
Reverse connection or omitting connection of R, S, T power
of main outdoor unit
Failing to receive main PCB signal at inverter PCB
Overheat of inverter heatsink
Temperature sensor of fan is open or short
Outdoor unit related error
Transmission related error
Outdoor unit
related error
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