Failure Code - Airwell VVFA Series Service Manual

15. Failure code

Digital tube Indication
indication on wired
on master controller
unit (hex)
Defrosting temp.
20 14
sensor Te failure
Ambient temp.
21 15
sensor Ta failure
Suction temp.
22 16
sensor Ts failure
Discharging temp.
23 17
sensor Td failure
26 1A
Indoor
26-1 1A
communication
failure
26-2 1A
High pressure
28 1C
sensor Pd failure
Low pressure
29 1D
sensor Ps failure
High pressure
30 1E
switch HPS failure
Outdoor EEPROM
33 21
failure
Discharging temp.
34 22 too high protection
(Td)
4-way valve
35 23
reversing failure
Low pressure
39-0 27 Ps too low
protection
Compression ratio
39-1 27
too high protection
Compression ratio
39-2 27
too low protection
High pressure
40 28 sensor Pd too high
protection
Discharging temp.
43 2B sensor Td too low
protection
Failure code
Failure description
definition
Open circuit or short circuit for continuous 60seconds, alarm
For continuous 200 cycles, can not find connected indoors
For continuous 300seconds, the searched indoor quantity is less
than the set quantity.
For continuous 300seconds, the searched indoor quantity is more
than the set quantity.
Open circuit or short circuit for continuous 60seconds, alarm
If disconnect for continuous 50ms, alarm. If alarm 3 times in an
hour, confirm the failure
Outdoor EEPROM failure
Td≥239°F(115°C), alarm; Td ≤185°F(85°C) resume. If it occurs 3
times in an hour, confirm the failure.
After the compressor start for 10 minutes, 4-way valve can be
met reversing pressure difference [6.0]kg, alarm, 3min resume,f it
occurs 3 times in an hour, confirm the failure.
(1) In cooling, Ps≤[0.5]kg or Ps≤[1.0]kg for continuous 5min, alarm.
Ps ≥[2.5]kg, resume
(2) In heating, Ps≤[0.3]kg or Ps≤[0.5]kg for continuous 5min,
alarm.Ps ≥[2.0]kg, resume
if it occurs 3 times in an hour, confirm the failure.
Compression ratio ≥[8.0] for continuous 5min or compression ratio
≥[9.0] for continuous 1min, stop and alarm.3min later, resume
automatically, if it occurs 3 times in an hour, confirm the failure.
Compression ratio ≤[1.8] for continuous 5min or compression ratio
≤[1.5] for continuous 1min, stop and alarm.3min later, resume
automatically, if it occurs 3 times in an hour, confirm the failure.
Pd≥[41.5]kg, or Pd≥[39]kg for continuous 5min, alarm and stop.
Pd≤[33]kg resume.if it occurs 3 times in an hour, confirm the
failure.
Td≤Pd+[10]
when the oil temp. met the startup condition, resume.if it occurs 3
times in an hour, confirm the failure.
for continuous 5 minutes, the unit stops and alarms.
42
Remarks
Resumable
Resumable
Resumable
Resumable
Resumable
Resumable
Resumable
Once
confirmation,
un-resumable
Un-resumable
Once
confirmation,
un-resumable
Once
confirmation,
un-resumable
Once
confirmation,
un-resumable