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4. Service procedures
1
2
3
4
Section
– 62 –
SM830076
2) Symptom: LCD on the remote controller displays “CHECK E01”.
(Unusual communication between remote controller and indoor unit.)
3) Symptom: LCD on the remote controller displays “CHECK E02”.
(Unusual communication between remote controller and indoor unit)
OK
No
NG
Yes
0334_M_I
Start
Repair the wiring.
Replace the remote controller.
Is the No. 1 line wire (red) for the
remote controller connected to
another line (2 or 3) or are No. 1
and No. 3 (black) wired reversed?
Remote controller judges itself with
self-diagnostic functions.
(To avoid misjudgment, always
remove the No. 1 line of the remote
controller wiring from the indoor
unit terminal plate.)
Replace the indoor unit PCB.
OK
No
No
No
Yes
Yes
Yes
NG
1145_THS_I
Start
Remote controller judges itself
with self-diagnostic functions
Replace the remote controller.
Correct the wiring.
Correct the setting.
Open the inspection pin.
Is there an open or a contact
defect in the No. 1 line of the
remote controller?
Is the indoor unit PCB’s non-volatile
memory IC setting (“CHECK F29”
displayed) wrong?
No
Yes
Yes
Is there 230 -208 V AC between
U1 and U2 of 8 P terminal plate?
Mis-wiring between the power
supply line and indoor/ outdoor
unit operation lines.
Correct the wiring, and pull out the
socket connected to the OC plug
to replace with the EMG plug.
Is the indoor
unit PCB’s
inspection
pin shorted?
Replace the indoor
unit PCB
.