Haier AU12NFKERA - System and Operational Failure Codes

26
Failure code
Failure code
display on
the outdoor
digital display
board
Failure code
denition
Failure code denition Remarks
39-0
Suction pressure
(Ps) too low
（
1
）
Cooling: Ps≤0.05 MPa or Ps≤0.1MPa
for 5 consecutive minutes, failure alarm.
Ps≥0.25MPa, failure removed.
（
2
）
Heating: Ps≤0.03Mpa or Ps≤0.05MPa
for 5 consecutive minutes, failure alarm.
Ps≥0.2MPa, failure removed.
Failure is locked if it occurs 3 times in one
hour.
Once failure
locked, un-
resumable.
39-1
Compression ratio
(ε)too high
Compression ratio (ε) ≥12.0 for 5
consecutive minutes, failure alarm. The
failure will be removed after 3 minutes.
Failure is locked if it occurs 4 times in 2
hours.
Once failure
locked, un-
resumable.
40
Discharge pressure
(Pd) too high
Pd≥4.15MPa or Pd≥3.9MPa for 5
consecutive minutes, failure alarm. Pd
≤3.3MPa, failure removed. Failure is locked if
it occurs 3 times in one hour.
Once failure
locked, un-
resumable.
43
Discharge temp. too
low protection(Td)
TdSH ≤ 10
℃
for 5 consecutive minutes,
failure alarm. After the oil temperature is
satised, the failure will be removed. Failure
is locked if it occurs 3 times in one hour.
Once failure
locked, un-
resumable.
46
Communication
failure with inverter
module
No module board signal is received within 30
seconds or data error.It will be automatically
restored after receiving correctly.
Resumable
51-0 LEVa over current LEV driver chip detection Resumable
51-2 LEVb over current LEV driver chip detection Resumable
52-0
LEVa circuit open
failure
LEV driver chip detection Resumable
52-2
LEVb circuit open
failure
LEV driver chip detection Resumable
53
CT current too low
or current sensor
failure
1. When the compressor runs continuously
for 1 minute, the compressor frequency
≥50 Hz for 5 minutes. If the current sensor
sampling value is less than 10, failure alarm.
The failure will be removed after 3 minutes.
2. When the compressor stops, the failure
will alarm if CT > 6A lasts for 3min. The
failure will be removed after 3 minutes.
Resumable
58
Tsco temp. sensor
failure
Continuous disconnect for 60 seconds or
short circuit, failure alarm.
Resumable