Service Diagnosis
4
8
Check the indoor PCB: Only indoor
charged measure the voltage
between 3 and 4 of IC6 on the
indoor mainboard with a universal
meter. And measure the voltage
between CN23(S) and CN52 (L) with
a universal meter.
If the voltage is a constant value of
0V DC to 5V DC .Or the voltage
between communication line (red)
and N (white line) is not close
to18V DC when only indoor
charged.
YES
The indoor PCB is damaged; replace
it with a new one.
NO
Test the outdoor power is
supply 230VAC with a
universal meter when indoor
and outdoor are charged.
NO
Check the cable
between outdoor
and power
YES
Measure the voltage Between
3 and 4 of IC5 on the Outdoor
mainboard with a universal
meter. The voltage is a
constant value of 0V DC to 5V
DC
LED2 light
The outdoor PCB is
damaged. Replace
it with a new one.
NO
The outdoor PCB is
well, and then
check the cable
YES
NO
YES
