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Error Code Meaning of error code and detection method
Judgment and action
E9
(6841)
Indoor/outdoor unit communication
error (Transmitting error) (Outdoor unit)
(1) Abnormal if “0” receiving is detected 30
times continuously though outdoor con-
troller circuit board has transmitted “1”.
(2) Abnormal if outdoor controller circuit
board could not find blank of transmission
path for three minutes.
1
Indoor/ outdoor unit connecting
wire has contact failure.
2
Defective communication circuit
of outdoor controller circuit board.
3
Noise has entered power supply.
4
Noise has entered indoor/ out-
door unit connecting wire.
1
Check disconnection or looseness of
indoor/outdoor unit connecting wire.
2
~
4
Put 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 transmis-
sion wire of remote controller.
2
Noise has entered indoor/ out-
door unit connecting wire.
3
Outdoor unit is not a series of
power-inverter.
4
Model name of remote con-
troller is PAR-S25A.
12
Put the power off, and on again to check.
Replace indoor controller circuit board or
outdoor controller circuit board if abnormal-
ity is displayed again.
3
Replace outdoor unit with power-inverter type
outdoor unit.
4
Replace remote controller with MA remote
controller.
Case
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
failure of connector CN2
between the outdoor controller
circuit board and the outdoor
power circuit board.
2
Breaking of wire or contact
failure 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.
1
Breaking of wire or contact
failure of connector between
outdoor controller circuit board
and M-NET board
2
Contact failure of M-NET board
power supply line
3
Noise has entered into M-NET
transmission wire.
2. Abnormal if communication between
outdoor controller circuit board and
M-NET board is not available.
1
Check disconnection, looseness, or breaking of
connection wire between outdoor controller cir-
cuit board (CNMNT) and M-NET board (CN5).
2
Check disconnection, looseness, or breaking of
connection wire between outdoor controller cir-
cuit board(CNMNT) and M-NET board (CND).
3
Refer to “ 10-3. M-NET Wiring method ”.
E8
(6840)
Indoor/outdoor unit communication
error (Signal receiving error)
(Outdoor unit)
(1) Abnormal if outdoor controller circuit
board could not receive anything
normally for three minutes.
1
Contact failure of indoor/out-
door unit connecting wire.
2
Defective communication circuit
of outdoor controller circuit board.
3
Defective communication cir-
cuit of indoor controller circuit
board.
4
Noise has entered into indoor/
outdoor unit connecting wire.
1
Check disconnection or looseness of indoor/
outdoor unit connecting wire of indoor or out-
door units.
2
~
4
Put the power off, and on again to check.
Replace indoor controller circuit board or
outdoor controller circuit board if abnormal-
ity is
displayed again.
(Note) Refer to indoor unit’s service manual for error code E0~E7.
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