49
Error Code
Abnormal points and detection method
Judgment and action
Case
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/ out-
door unit connecting wire.
3
Outdoor unit is not a series of
power-inverter.
4
Model name of remote control-
ler is PAR-S25A.
12
Turn the power off, and on again to check.
Replace indoor controller board or outdoor
controller circuit board if abnormality is
displayed again.
3
Replace outdoor unit with power-inverter type
outdoor unit.
4
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 defec-
tive.
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
Check M-NET transmission wiring method.
P8
1
Slight temperature difference
between indoor room
temperature and pipe <liquid
or condenser/evaporator>
temperature thermistor
• Shortage of refrigerant
• Disconnected holder of
pipe <liquid or condenser/
evaporator> thermistor
• Defective refrigerant circuit
2
Converse connection of
extension pipe (on plural units
connection)
3
Converse wiring of indoor/
outdoor unit connecting wire
(on plural units connection)
4
Defective detection of indoor
room temperature and pipe
<condenser/evaporator>
temperature thermistor
5
Stop valve is not opened
completely.
Pipe temperature
<Cooling mode>
Detected as abnormal when the pipe
temperature is not in the cooling range
3 minutes after compressor start and
6 minutes after the liquid or condenser/
evaporator pipe is out of cooling range.
Note 1) It takes at least 9 minutes to detect.
Note 2) Abnormality P8 is not detected in
drying mode.
Cooling range : Indoor pipe temperature
(TH2 or TH5) – intake temperature
(TH1)
[
-3 deg
TH: Lower temperature between liquid pipe
temperature and condenser/evaporator
temperature
<Heating mode>
When 10 seconds have passed after the
compressor starts operation and the hot
adjustment mode has finished, the unit is
detected as abnormal when condenser/
evaporator pipe temperature is not in
heating range within 20 minutes.
Note 3) It takes at least 27 minutes to
detect abnormality.
Note 4) It excludes the period of defrosting
(Detection restarts when defrosting
mode is over)
Heating range : 3 deg
[
(Condenser/
Evaporator temperature(TH5) –
intake temperature(TH1))
1
~
4
Check pipe <liquid or condenser/
evaporator> temperature with room
temperature display on remote controller
and outdoor controller circuit board.
Pipe <liquid or condenser / evaporator>
temperature display is indicated by setting
SW2 of outdoor controller circuit board as
follows.
23
Check converse connection of extension
pipe or converse wiring of indoor/outdoor
unit connecting wire.
Conduct temperature check with outdoor
controller circuit board after connecting
‘A-Control Service Tool (PAC-SK52ST)’.
(
)
1
2
3
4
5
6
ON
OFF
1
2
3
4
5
6
ON
OFF
1
2
3
4
5
6
ON
OFF
1
2
3
4
5
6
ON
OFF
A-Control Service Tool SW2 setting
Temperature display of indoor liquid pipe
Indoor 1
Temperature display of indoor liquid pipe
Indoor 2
Temperature display of indoor condenser/
evaporator pipe Indoor 1
Temperature display of indoor condenser/
evaporator pipe Indoor 2
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 3 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
Turn the power off, and on again to
check. Replace outdoor controller circuit
board if abnormality is displayed again.
OCH527B
