Haier AD092MLERA - Page 253

252
LD indication
on master
unit
Indication
on wired
controller
(hex)
Failure code
definition
Failure description Remarks
37-0 25
Default phase of
3-phase power
supply or phase
sequence error
S phase default
Once confirmation,
Unresumable
37-1 25 T phase default
37-2 25
S phase and T phase are normal, but sequence(phase reversion)
is wrong
38 26
High pressure sensor
Pd protection against
too low pressure
Wrong voltage frequency. Check BM3-5 setting
Once confirmation,
Unresumable
39-0 27
Low pressure sensor
Ps protection against
too low pressure
After compressor starts up (excluding the remains operation), too low
pressure i
s detected for 5 mins co
ntinuously (cooling: Ps< 0.10MPa;
heating: Ps< 0.05MPa; oil return: Ps<0.03MPa), stop and alarm.
Resume automatically after 170 secs. Three times an hour, failure
confirmed.
Once confirmation,
Unresumable
39-1 27
Compression ratio
ε protection against
too high ratio
After compressor starts up, ε>8.0 is detected for 5 mins
continuously, stop and alarm; ε >9.0 is detected for 1min
continuously under cooling or ε>8.5 under heating, stop and
alarm.
Resume automatically after 170 secs. Four times an hour,
failure conrmed.
Once confirmation,
Unresumable
39-2 27
Compression ratio
ε protection against
too low ratio
Normally in operation (excluding startup, deforest, oil return,
remains, stop), detect ε <1.8 for continuous 5 mins, stop
and alarm. Or ε<1.5 for continuous for 1min, stop and alarm.
Resume automatically after 170 secs. Four times an hour,
failure conrmed.