50
DC bus low voltage protection
High temperature protection of
air side heat exchanger
temperature(T3).
DC bus high voltage
protection
Zero speed protection
ERROR
CODE
MALFUNCTION
OR PROTECTION
In winter, if the unit has E0 and Hb malfunction and the unit is not repaired in time, the water pump and pipeline systerm
may be damaged by freezing, so E0 and Hb malfunction must be repaired in time.
UPPER UNIT
DISPLAY No.
33
65
116
134
136
138
139
121
High temperature protection of
inverter module
135
DC bus low voltage protection.
141
137
106
Inverter or compressor
protection
Current sampling error of PFC
circuit
Rotating stall protection
EXV1 fault
T4 sensor out of operation
range.
Phase loss protection of
compressor