Airwell YEVFD Series, Service Manual

Page: 58 / 92

Inverter outdoor unit failure code
Digital
tube
indication
on master
unit
Indication
on wired
controller
(hex)
Failure code
definition
Failure description Remarks
20-0 14
Defrosting temp.
sensor (Te) failure
Continuous disconnect for 60 seconds or short circuit,
failure alarm
Resumable
21 15
Ambient temp.
sensor (Ta) failure
Continuous disconnect for 60 seconds or short circuit,
failure alarm
Resumable
22 16
Suction temp.
sensor Ts failure
AD value is below 11(open circuit) or over 1012(short
circuit) for 60seconds, in defrosting and within 3 minutes
after defrosting, no alarm
Resumable
23 17
Discharging temp.
sensor Td failure
After compressor is running for 5 minutes, AD value
is below 11(open circuit) or over 1012(short circuit) for
60seconds, in course of startup, defrosting and within 3
minutes after defrosting, no alarm
Resumable
26-0
1A
Communication
failure with indoor
units
No indoor units connection can be detected for
continuous 200 seconds.
Resumable
26-1 1A
Number of indoor
units less than
connected indoor
units
It was detected that the number of indoor units was less
than the set number for 300 seconds.
26-2 1A
Number of indoor
units more than
connected indoor
units
It was detected that the number of indoor units was more
than the set number for 300 seconds.
28 1C
Discharge
pressure sensor
(Pd) failure
Continuous disconnect for 60 seconds or short circuit,
failure alarm.
Resumable
29 1D
Suction pressure
sensor (Ps) failure
Continuous disconnect for 60 seconds or short circuit,
failure alarm.
Resumable
30
1E
High pressure
switch (HPS)
failure
When the high pressure switch is disconnected, failure
alarm. When the high pressure switch is closed, failure
removed. Failure is locked if it occurs 3 times in one
hour.
Once failure
locked, un-
resumable.
33 21 EEPROM failure Oudoor unit EEPROM failure Un-resumable
34
22
Discharge temp.
too high (Td)
Td≥[115]°C,failure alarm; Td≤[85]°C,failure removed.
Failure is locked if it occurs 3 times in one hour.
Once failure
locked, un-
resumable
35
23
4-way valve
revering failure
After the compressor starts, it runs continuously for 10
minutes, if the 4-way valve does not reverse
,
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
39-0 27
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
confirmation,
un-resumable
17. Failure Code
56