Haier AD482MPERA - Page 254

253
LD
indication
on master
unit
Indication
on wired
controller
(hex)
Failure code definition Failure description Remarks
40 28
High pressure sensor Pd
protection against too high
pressure
After compressor starts up, Pd≥4.15MPa continues for
2 secs, stop and alarm. Resume automatically after
170 secs. Four times an hour, failure confirmed. (similar
to high pressure switch alarm)
Once confirmation,
Unresumable
41-0 29
Water inlet temp. Twi protection
against too low temp. (Water
Cooled VRF)
Water Cooled VRF, after compressor starts up, water
inlet temp. Twi<10 degree continues for 60 secs,
stop and alarm. Resume automatically after 170 secs.
Three times an hour, failure confirmed.
Once confirmation,
Unresumable
41-1 29
Water inlet temp. Twi protection
against too high temp. (Water
Cooled VRF)
Water Cooled VRF, after compressor starts up, water
inlet temp. Twi>45 degree continues for 60 secs,
stop and alarm. Resume automatically after 170 secs.
Three times an hour, failure confirmed.
42-0 2A
Water system outlet antifreeze
protection (Water Cooled VRF)
Water Cooled VRF, after compressor starts up,
water outlet temp. Two<4 degree continues for 60
secs, stop and alarm. Two>9 degree for 60 secs
continuously, resume. No lock.
Once confirmation,
Unresumable
42-1 2A
Water system low pressure
antifreeze protection (Water
Cooled VRF)
Water Cooled VRF, after compressor starts up,
low pressure saturated temp. Ps_temp<0 degree
continues for 60 secs, stop and alarm. No lock.
43-0 2B
Discharging temp. sensor Tdi
too low protection
In normal operation, if Td<CT+10°C for continuous
5 minutes, the unit stops and alarms. 2 minutes and
50 seconds later, resume automatically. If it occurs
3 times in an hour, confirm the failure. After fixed
frequency compressor alarms, inverter compressor
will continue to run. If fixed frequency compressor has
been locked for 3 times, the unit will stop and alarm.
Once confirmation,
Unresumable
43-1 2B
Discharging temp. Sensor td1
too low protection
44 2C
Low pressure sensor Ps
protection against too high
pressure
Not suitable for this model
Once confirmation,
Unresumable