49
Failure code
LED
indication
on master
unit
Indication
on wired
controller
(hex)
Failure code
definition
Failure description
Remarks
43-0
2B
Discharging
temp. sensor
Tdi too low
protection
After 10 minutes for normal operation
(exclude start up, defrosting, oil return,
remain, stop), if Td
＜
CT+10
℃
for
continuous 5 minutes, stop and alarm. If it
occurs 3 times in an hour, lock the alarm.
Once
confirmed,
un-
resumable
43-1
2B
Discharging
temp. sensor
Td1 too low
protection
44
2C
Low pressure
sensor Ps too
high protection
Not applicable for this mode
Once
confirmed,
un-
resumable
45
2D
Communication
failure among
outdoor units
No communication within 30 seconds
continuously (E)
Resumable
46
2E
Communication
with INV board
failure
No communication within 30 seconds
continuously (E)
53-0
35
Current
detector CT
failure
Detect before starting up, show incorrect
voltage of sensor, stop for 3 minutes,
resume to be normal automatically
Resumable
64-0
40
Current
detector CT
over current
failure
Current of fixed compressor at interval
25msec exceed the current limit for 2 times
and then stop. Stop for 3 minutes, then
resume to be normal automatically. If it
occurs 4 times in an hour, lock the alarm.
＊
But, in 4 seconds after startup, not
detected.
Once
confirmed,
un-
resumable
67
43
Communication
with motor
driving board
failure
Without communication for 4 minutes.
Resumable
71-0
47
Fan 1 locked-
rotor
（
Left
）
Running at speed below 20rpm for 30s,
or at speed of 70% lower than target for 2
minutes, stop. 170 seconds later, resume
automatically. If it occurs 4 times in an hour,
confirm the failure.
Once
confirmed,
un-
resumable
71-1
47
Fan 2 locked-
rotor
（
Right
）
75-0
4B
No pressure
drop between
high pressure
and low
pressure
In 1 minute after INV compressor starts
up, Pd-Ps≤0.1MPa,then stop. 170 seconds
later, resume automatically. If it occurs 4
times in an hour, confirm the failure.
Once
confirmed,
un-
resumable
