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Error Code
Abnormal point and detection method Judgment and action
Case
E9
(6841)
Indoor - branch box/branch box -
outdoor unit communication error
(Transmitting error)
(Branch box/outdoor unit)
(1) Abnormal if “0” receiving is detected 30
times continuously though branch box/
outdoor controller circuit board has
transmitted “1”.
(2) Abnormal if branch box/outdoor control-
ler circuit board could not find blank of
transmission path for 3 minutes.
1 Indoor–branch box/
branch box–outdoor unit con-
necting wire has contact failure.
2 Defective communication cir-
cuit of outdoor controller circuit
board
3 Noise has entered power sup-
ply.
4 Noise has entered Indoor–
branch box/branch box–
outdoor unit connecting wire.
1 Check disconnection or looseness of indoor–
branch box/branch box–outdoor unit connect-
ing wire.
2~4 Turn the power off, and on again to
check. Replace outdoor controller circuit
board if abnormality is displayed again.
EF
(6607
or
6608)
Non defined error code
This code is displayed when non defined
error code is received.
1 Noise has entered transmission
wire of remote controller.
2 Noise has entered Indoor–
branch box/branch box–
outdoor unit connecting wire.
3 Model name of remote control-
ler is PAR-S25A.
12 Turn the power off, and on again to check.
Replace indoor controller board or branch
controller board or outdoor controller circuit
board if abnormality is displayed again.
3 Replace remote controller with MA remote
controller.
Ed
(0403)
Serial communication error
1.Abnormal if serial communication
between outdoor controller circuit
board and outdoor power circuit board
is defective.
1 Breaking of wire or contact fail-
ure of connector CN2 between
the outdoor controller circuit
board and the outdoor power
circuit board
2 Breaking of wire or contact fail-
ure of connector CN4 between
the outdoor controller circuit
board and the outdoor power
circuit board
3 Defective communication circuit
of outdoor power circuit board
4 Defective communication circuit
of outdoor controller circuit board
for outdoor power circuit board
12 Check connection of each connector CN2
and CN4 between the outdoor controller
circuit board and the outdoor power circuit
board.
3 Replace outdoor power circuit board.
4 Replace outdoor controller circuit board.
PA
(2520)
Forced compressor stop.
(Overlap malti function of drain pump in
indoor unit and linear expansion valve
in branch box.)
When condition which the outdoor unit is
stopped forcibly consists, or the drain sen-
sor detects continuously to go under water
5 times, and also detects ''[liquid pipe
temperature-suction temperature] ≤ –10°C
[–18°F]'' for 30 minutes continuously, the
indoor unit stops abnormally (however, fan
operates by normal control) that indoor
unit and excluding [Fan mode or OFF] in
same refrigerant system. Also, the outdoor
unit which is connected to that indoor unit
with refrigerant system stops abnormality
(compressor is inhibited to operation). In
this time, <PA> is displayed.
1 Drain pump trouble
2 Drain defective
· Drain pump clogging
· Drain pipe clogging
3 Open circuit of drain sensor
side heater
4 Contact failure of drain sensor
connector
5 Dew condensation on drain
sensor
· Drain water descends along
lead wire.
· Drain water waving due to fil-
ter clogging
6 Indoor controller board defec-
tive
· Drain pump drive circuit failure
· Drain heater output circuit fail-
ure
7 Both of above mentioned 1~6
and the linear expansion valve
full closed failure happens syn-
chronistically.
1 Check the drain pump.
Performance
2 Please confirm whether water can be
drained.
3 Confirm the resistance of the drain sensor
side heater.
4 Check the connector contact failure.
5 Check the drain sensor leadwire mounted.
Check the filter clogging.
6 If the above mentioned checkpoints has any
problem, replace the indoor controller board.
7 Check whether the indoor linear expansion
valve leaks or not.