Specifications

SiBE341027 Troubleshooting by Remote Controller
Service Diagnosis 135
Troubleshooting
∗
: Referring to the information on P.182.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
NO
YES
Replace the lead wires.
NO
YES
NOYES
NO
YES
YES
NO
YES
Turn OFF the power supply
once, and then check the
compressor lead wires.
Do the lead wires have
any disconnection, broken
wire, short circuit, or
ground fault?
Turn ON the power supply
again.
Does the power
supply normally come
back ON?
It is supposed that the error results
from external causes other than
failures (e.g. exogenous noises or
thunder).
Is the individual
system applied to the
outdoor unit?
Multi systemIndividual system
While in monitor mode, check
whether the system is right-hand
(service monitor PCB 1) or left-
hand (service monitor PCB 3).
While in monitor mode,
check the outdoor unit
concerned.
Check if the power
transistor is
normal.
Check if the power
transistor of the
fan driver is
normal.
Check if insulation
resistance of the
compressor is 100k
Ω
and above.
Replace the compressor and
compressor inverter PCB (A4P) at
the same time.
Replace the inverter PCB (A4P).
Replace the compressor inverter
PCB (A4P) and fan inverter PCB
(A5P).
Replace the inverter PCB (A3P).
NO
CHECK 4
∗
CHECK 4
∗
CHECK 4