Sanyo SPW-XR253GH56 Technical Data & Service Manual page 177

2) Symptom: LCD on the remote controller displays "CHECK E01".
(Unusual communication between remote controller and indoor unit.)
Start
Remote controller judges itself
with self-diagnostic functions
OK
Is there an open or a contact
defect in the No. 1 line of the
remote controller?
No
Is there 220 -240 V AC between
U1 and U2 of 8 P terminal plate?
No
Is the setting for the non-volatile
memory IC on the indoor unit PCB
inappropriate?
No
Is the indoor unit PCB's forced
OPR pin shorted?
No
Replace the indoor unit PCB.
3) Symptom: LCD on the remote controller displays "CHECK E02". (Unusual
communication between remote controller and indoor unit)
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.
NG
Replace the remote controller.
Yes
Correct the wiring.
Mis-wiring between the power
Yes
supply line and indoor/ outdoor
unit operation lines.
Yes
Correct the setting.
Yes
Open the forced OPR pin.
Start
Yes
No
NG
OK
IV - 11
4. Service procedures
Correct the wiring, and pull out the
Yes
socket connected to the OC plug
to replace with the EMG plug.
Repair the wiring.
Replace the remote controller.
0334_M_I
1
2
1905_M_I
3
4
5
SM830080