SiBE12-908
Troubleshooting
Service Diagnosis
128
Troubleshooting
(R9435)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Is there any improper
wiring?
Check the relay wire between the
indoor unit and the outdoor unit
for color and number
Correct relay wire between
indoor and outdoor unit.
YES
NO
* For the unit with standby
power saving function,
perform setting of fan
operation to release the
standby power function.
Is the insulation
between relay wire and
the insulation to the
earth properly?
Properly
Does the distance
of relay wire exceed
30 m?
Poor insulation
YES
NO
Check outdoor unit LED A
Does it flashing?
Disconnect No. 3
It glows or not
Flashing
Measure the voltage between 2
and 3 (Apply negative terminal to
No. 2 in DC range)
Is the measured
value 30 to 50 V?
YES
NO
(below 30 V or above 50 V)
Voltage
7 sec.
15 sec.
Stop
Power on
Check during
this period
Fault
determined
Replace relay wire between
indoor and outdoor unit.
Distance is to be within the
specified range (30 m or
less).
Replace the outdoor unit
PCB.
Replace the indoor control
PCB (A1P).
Replace the indoor control
PCB.
