Haier AD482MPERA - Page 257

256
LD
indication
on master
unit
Indication
on wired
controller
(hex)
Failure code
definition
Failure description Remarks
116 74
Abnormal
communication with
module
If failed to detect the communication signal for 30 secs, error
alarms. INV control board will promptly resume when detecting
that.
Four times an hour,
then failure confirmed.
Once confirmation,
Unresumable
117 75
Module software: over
current
Module software over current
118 76 Module: start up failed Compressor startup failed for 5 consecutive times
119 77
Inverter controller
current detection: circuit
abnormal
Malfunction of INV controller current detecting sensor
Non connection or wrong connection
120 78
Inverter controller power
supply abnormal
INV controller power supply suddenly cut off when supplying
power
121 79
Power supply
of inverter board is
abnormal
Power supply of inverter board is broken down instantly
3 times in an hour,
confirm failure;
once confirmation,
Unresumable
122 7A
Radiator temp.Sensor of
transducer abnormal
Resistor of temp. sensor abnormal or temp. sensor disconnected
125 7D
Compressor frequency
unmatch
(Current frequency≥INV; target frequency+3Hz) or (target
frequency>0 & actual frequency=0) continues 2 mins
Resumable
127 7F MCU reset abnormal
If master unit inspects that MCU of slave unit is reset, and the
slave unit is running, master unit will alarm MCU reset failure,
then the whole system will stop; if in heating mode, when restart
up, 4-way valve will not be electrified, the whole system will
execute 4-way valve reversing operation again. if it occurs three
times in an hour, alarm and confirm the failure.
Once confirmation,
Unresumable
128 80 MCU requires upgrade
VRF system program version is incompatible. Prompt to upgrade
the program.
Once confirmation,
Unresumable