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4. Service procedures<br />
2) Symptom: LCD on the remote controller displays “CHECK E01”.<br />
(Unusual communication between remote controller and indoor unit.)<br />
Start<br />
Remote controller judges itself<br />
with self-diagnostic functions<br />
OK<br />
Is there an open or a contact<br />
defect in the No. 1 line of the<br />
remote controller?<br />
No<br />
Is there 220 -240 V AC between<br />
U1 and U2 of 8 P terminal plate?<br />
No<br />
Is the setting for the non-volatile<br />
memory IC on the indoor unit PCB<br />
inappropriate?<br />
No<br />
Is the indoor unit PCB’s forced<br />
OPR pin shorted?<br />
No<br />
Replace the indoor unit PCB.<br />
3) Symptom: LCD on the remote controller displays “CHECK E02”. (Unusual<br />
communication between remote controller and indoor unit)<br />
Start<br />
Is the No. 1 line wire (red) for the<br />
remote controller connected to<br />
another line (2 or 3) or are No. 1<br />
and No. 3 (black) wired reversed?<br />
No<br />
Remote controller judges itself with<br />
self-diagnostic functions.<br />
(To avoid misjudgment, always<br />
remove the No. 1 line of the remote<br />
controller wiring from the indoor<br />
unit terminal plate.)<br />
OK<br />
NG<br />
Yes<br />
Yes<br />
Yes<br />
Replace the indoor unit PCB.<br />
Replace the remote controller.<br />
Yes<br />
NG<br />
Correct the wiring.<br />
Yes<br />
Mis-wiring between the power<br />
supply line and indoor/ outdoor<br />
unit operation lines.<br />
Yes<br />
Correct the setting.<br />
Open the forced OPR pin.<br />
IV - 11<br />
Repair the wiring.<br />
Replace the remote controller.<br />
Correct the wiring, and pull out the<br />
socket connected to the OC plug<br />
to replace with the EMG plug.<br />
0334_M_I<br />
1905_M_I<br />
1<br />
2<br />
3<br />
4<br />
5
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