40
Troubleshooting
19 times
Charging malfunction of capacitor
PU
blink
17 times
High pressure protection of system
E1
blink once
Overload protection of compressor
H3
blink
3 times
Wrong connection for communication wire or malfunction of
expansion valve (free match)
dn /
/
/
Wrong connection for communication wire or malfunction detection
status of expansion valve (free match)
dd /
/
/
Mode shock
E7
blink 7 times
Freon recovery mode
Fo
blink once
blink once
Defrosting and oil return under heating
H1
blink
once
Failure start-up of compressor
Lc
blink
11 times
Discharge high-temperature protection of compressor
E4
blink 4 times
Overload protection
E8
blink 8 times
Overcurrent protection of the complete unit
E5
blink 5 times
Overcurrent protection of phase current
P5
blink
15 times
Desynchronizing of compressor
H7
blink
7 times
Loss phase/inverse phase protection for compressor
Ld
/
/
/
Module current protection (IPM protection)
H5
blink
5 times
Low voltage protection of DC bus bar
PL
blink
21 times
High voltage protection of DC bus bar
PH
blink
11 times
PFC protection
HC
blink
6 times
Limit/decrease frequency due to current protection of the complete
unit
F8
blink
8 times
Limit/decrease frequency due to module current protection (phase
current)
En /
/
/
Limit/decrease frequency due to discharge
F9
blink
9 times
Limit/decrease frequency due to freeze protection
FH
blink twice
blink twice
Limit/decrease frequency due to overload
F6
blink
6 times
Limit/decrease frequency due to module temperature protection
EU
blink
6 times
blink 6 times
Oil return under cooling
F7
blink
7 times
Cold air prevention protection
E9
blink 9 times
Freeze protection
E2
blink twice
Module temperature protection
P8
blink
Note: Please refer to service manual for the troubleshooting procedure for outdoor unit.
