52
Failure code
LED
indication
on master
unit
Indication
on wired
controller
(hex)
Failure code
definition
Failure description
Remarks
115
73
Voltage too
high of modular
DC
If power voltage
＞
DC642V, alarm.
If voltage≤DC642V, INV control board
resumes automatically.
116
74
Communication
with modular
abnormal
If communication signal can not be
detected for continuous 30 seconds, alarm.
After it can be detected, INV control board
resumes automatically.
117
75
Modular
software over
current
Modular software over current.
118
76
Modular startup
failure
Compressor starts up fail for continuous 5
times.
119
77
Current
detecting circuit
abnormal of
INV controller
Sensor for detecting current of inverter
controller is abnormal.
Cannot be connected or wrong connection.
120
78
Inverter
controller
power supply
abnormal
Power supply of inverter controller stops
suddenly.
121
79
Power supply
of inverter
controller board
is abnormal
Power supply of inverter controller board is
broken down instantly.
If it occurs
4 times in
an hour,
confirm
the failure.
Once
confirmed,
un-
resumable.
122
7A
Radiator
temp. sensor
of inverter
controller is
abnormal.
Resistor of temp. sensor abnormal or temp.
sensor disconnected.
125
7D
Compressor
frequency un -
match
(Current frequency≥INV target
fr3Hz) or
（
target frequency>0
& actual frequency=0
）
for continuous 2
minutes
Resumable
