PL
Abnormal refrigerant circuit
During Cooling operation, the following
conditions are regarded as failures when
detected for 1 second.
a) The compressor continues to run for 30
or more seconds.
b) The liquid pipe temperature or the
condense/evaporator temperature is
75°C or more.
These detected errors will not be
cancelled until the power source is
reset.
1
Abnormal operation of 4-way
valve
2
Disconnection of or leakage in
refrigerant pipes
3
Air into refrigerant piping
4
Defective refrigerant circuit
(clogging)
1
When this error occurs, be sure to
replace the 4-way valve.
2
Check refrigerant pipes for disconnection or
leakage.
3
After the recovery of refrigerant, vacuum
dry the whole refrigerant circuit.
4
Check refrigerant circuit for operation.
To avoid entry of moisture or air into
refrigerant circuit which could cause
abnormal high pressure, purge air in
refrigerant circuit or replace refrigerant.
26
Check 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.
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.
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.
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.
OCH583