Troubleshooting SiBE04-809
88 Service Diagnosis
4.10 Outdoor Unit PCB Abnormality
Remote
Controller
Display
E1
Method of
Malfunction
Detection
Detect within the programme of the microcomputer that the programme is in normal running
order.
Malfunction
Decision
Conditions
When the programme of the microcomputer is in abnormal running order.
Supposed
Causes
Out of control of microcomputer caused by external factors
Noise
Momentary fall of voltage
Momentary power loss
Defective outdoor unit PCB
Troubleshooting
(R7183)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
YES
NO
NO
YES
Power on again
Check to see that the machine is
grounded.
Replace the outdoor unit
PCB.
Carry out grounding work.
The cause can be external
factors other than
malfunction.
Investigate the cause of
noise.
Error again?
Grounded?
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