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LED
Indication
indication
on wired
on master
controller
unit
(hex)
Modular software
117
75
over current
Modular startup
118
76
failure
Current detecting
119
77
circuit abnormal of
INV controller
Inverter controller
120
78
power supply
abnormal
Power supply of
121
79
inverter controller
board is abnormal
Radiator temp.
sensor of inverter
122
7A
controller is
abnormal.
Compressor
125
7D
frequency un -
match
127
7F
MCU reset failure
MCU program need
128
80
update
Failure code
definition
Modular software over current.
Compressor starts up fail for continuous 5 times.
Sensor for detecting current of inverter controller
is abnormal.
Cannot be connected or wrong connection.
Power supply of inverter controller stops
suddenly.
Power supply of inverter controller board is
broken down instantly.
Resistor of temp. sensor abnormal or temp.
sensor disconnected.
(Current frequency≥INV target frequency+3Hz)
or (target frequency>0 & actual frequency=0) for
continuous 2 minutes
If the host inspects that MCU of submachine is
reset, and the submachine is running, the host
alarm MCU reset failure, then the whole system
stop. In heating mode, when restart up, 4WV
will not be electrified, and the whole system will
execute 4WV reversing operation again. If it
occurs 4 times in one hour, confirm the failure.
The VRF system program is incompatible,
program update prompt.
Failure description
146
Remarks
If it occurs 4 times
in an hour, confirm
the failure. Once
confirmed,
unresumable.
If it occurs 4
times in an hour,
confirm the failure.
Once confirmed,
unresumable.
Resumable
Once confirmed,
unresumable.
Unresumable
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