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
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