Technibel KPAVM93R5TAA Technical Data & Service Manual page 31

(5) Symptoms and parts to inspect
1) Symptom: LCD on the remote controller does not display and remote controller does
not operate.
Yes
Miswiring of
power supply
wires and
indoor/outdoor
control lines
Correct the
wiring. Remove the
socket connected to
the OC plug on the
PCB and connect to
the EMG plug instead.
No
Correct the
connections
Replace the
No
indoor unit power
transformer.
No
No
Check and repair the
power breaker etc.
No
Are the connections
for the 4P connector
for the indoor unitÕs
PCB power trans-
former good?
Yes
Yes
Replace the
indoor unit PCB.
Start
Yes
No
Yes
No
Yes
Yes
No
Is the primary
side of the indoor
power transformer
shorted?
Yes
31
Is there 12 V DC
No
between 2 and 3
of the remote
controller?
Yes
Replace the
remote controller.
No
Is the 220-240 V AC
circuit shorted?
Yes
Replace or repair.
Repair the
remote
controller
wiring.
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