Airwell YEVFD Series, Service Manual

Page: 59 / 92

Digital
tube
indication
on master
unit
Indication
on wired
controller
(hex)
Failure code
definition
Failure description Remarks
39-1 27
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 28
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
2B
Discharge
temp. too low
protection(Td)
TdSH ≤ 10
℃
for 5 consecutive minutes, failure alarm.
After the oil temperature is satisfied, the failure will be
removed. Failure is locked if it occurs 3 times in one
hour.
Once failure
locked, un-
resumable.
46
2E
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
33
LEVa over current LEV driver chip detection Resumable
51-2
33
LEVb over current LEV driver chip detection Resumable
52-0
34
LEVa circuit open
failure
LEV driver chip detection Resumable
52-2
34
LEVb circuit open
failure
LEV driver chip detection Resumable
53
35
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
3A
Sub-cooling temp.
sensor Tsco temp.
sensor failure
Continuous disconnect for 60 seconds or short circuit,
failure alarm.
Resumable
59
3B
Sub-cooling temp.
sensorTliqsc
temp. sensor
failure
Continuous disconnect for 60 seconds or short circuit,
failure alarm.
Resumable
64
40
CT value too high
When the CT current exceeds the specified value for 5
consecutive seconds, failure alarm. The failure will be
removed after 3 minutes. Failure is locked if it occurs 3
times in one hour.
Once failure
locked, un-
resumable.
57