SiENBE12-713 Troubleshooting
Service Diagnosis 249
5.11 Outdoor Unit PCB Abnormality
Remote Control
Display
E1
Outdoor Unit LED
Display
A 5 1 4 2 4 3 4 4 1
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
Replace the outdoor unit
PCB.
Carry out grounding work.
The cause can be external
factors other than
malfunction.
Investigate the cause of
noise.
(R5142)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Power on again
YES
Error again?
NO
Check to see that the machine is
grounded.
NO
Grounded?
YES
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