46
Failure code
LED
indication
on master
unit
Indication
on wired
controller
(hex)
Failure code
definition
Failure description
Remarks
26-0
1A
Outdoor unit
and indoor unit
communication
failure
Not finding connected indoor units for
continuous 200 cycles
Resumable
26-1
1A
The searched indoor unit quantity is less
than the set quantity for continuous 270
seconds
26-2
1A
The searched indoor unit quantity is more
than the set quantity for continuous 170
seconds
26-3
1A
The searched valve box BS quantity is less
than set quantity for continuous 5 minutes
26-4
1A
The searched valve box BS quantity is
more than set quantity for continuous 5
minutes
26-5
1A
After powered on the outdoor units, the
detected quantity of the indoor units which
connected with the valve box is inconsistent
with the actual quantity
27
1B
Oil temp. too
high protection
（
Toili
）
Toili
≥120
℃（
E
）
at interval 25msec,
continuous 2sec, and over the set value,
then stop and alarm. The oil temp. 10
℃
lower than the alarm condition for 3
minutes after stop. If it occurs 4 times in an
hour, confirm the failure. (the same as Td
too high protection.)
Once
confirmed,
un-
resumable
28
1C
High pressure
sensor Pd
failure
If AD value is below 11 (open circuit) or
over 1012 (short circuit) for 60 seconds,
alarm.
Resumable
29
1D
Low pressure
sensor Ps
failure
30-0
1E
High pressure
switch HPSi
failure
When power on, the confirmation of OFF
for continuous 2sec, alarm.
If it occurs 4 times in an hour, confirm the
failure.
Once
confirmed,
un-
resumable
30-1
1E
High pressure
switch HPS1
failure
32-0
20
Heat
exchanger
outlet temp.
Tsco failure
If AD value is below 11 (open circuit) or
over 1012 (short circuit) for 60 seconds,
alarm, sensor has no alarm when abnormal
in heating mode.
Resumable
32-1
20
Liquid pipe
SC temp. of
subcooler Tliq
failure
