SiBE121021_C Troubleshooting for Outdoor Unit
Service Diagnosis 335
7.2 Outdoor Unit PCB Abnormality
Remote
Controller
Display
E1
Outdoor Unit LED
Display
A
j
1
i
2
i
3
i
4
h
5
h
Method of
Malfunction
Detection
Detect within the program of the microcomputer.
Malfunction
Decision
Conditions
The program of the microcomputer is in abnormal running order.
Supposed
Causes
îš„
Noise
îš„
Momentary fall of voltage
îš„
Momentary power failure
îš„
Defective outdoor unit PCB
Troubleshooting
(R7183)
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
YES
NO
NO
YES
Replace the outdoor unit PCB.
Carry out grounding work.
The cause can be external
factors other than malfunction.
Investigate the cause of noise.
Power on again
Error again?
Check to see that the unit is
grounded.
Grounded?
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