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Check the indoor PCB: only indoor
charged measure the voltage
between 3 and 4 of IC6 on the indoor
PCB with a universal meter. And
measure the voltage between
CN23(S) and CN17 (L) with a
universal meter.
If the voltage is a constant
value from DC 0V to DC 5V.Or
the voltage between
communication line (red) and N
(white line) is not close to18V
DC when only indoor charged.
NO
Test the outdoor power is
supply 230VAC with a
universal meter when indoor
and outdoor are charged.
YES
LED2 light of the outdoor
YES
LED 1 light
YES
The indoor PCB is
damaged; replace it
with a new one.
NO
Check the cable
between
and power
NO
The module PCB is
damaged. Replace
it with a new one.
YES
Measure the voltage
between 3 and 4 of IC9 on
the Outdoor mainboard
with a universal meter .The
voltage is a constant value
of 0V DC to 5V DC
NO
Outdoor PCB is ok then check
cable.
45
outdoor
YES
Service Diagnosis
The outdoor PCB is
damaged. Replace
it with a new one.
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