27
Installation and Maintenance
Service Manual
Note: Please refer to service manual for the troubleshooting procedure for outdoor unit.
Recovery refrigerant mode
operation status
Fo
blink once
blink once
X-fan
operation status
ON for 0.5s
and OFF for
10s
Defrosting or oil return in heating
operation status
OFF for 0.5s
and ON for
10s
Startup failure
It can be displayed
through remote
controller within 200s
and displayed directly
after 200s
Lc
blink 11 times
Compressor exhaust high temperature protection
E4
blink 4 times
Anti-high temperature protection
E8
blink 8 times
AC over-current protection
E5
blink 5 times
Over compressor phase current protection
P5
blink 15 times
Compressor loss step protection
H7
blink 7 times
Compressor loss of phase protection
Ld
IPM protection
H5
blink 5 times
Low PN voltage protection
PL
blink 21 times
Over voltage protection for PN
PH
blink 11 times
PFC protection
HC
blink 6 times
4-way valve reversal abnormal
U7
blink 20 times