Daikin CTXU25G2V1B Service Manual page 124

SiBE12-908
Troubleshooting
Service Diagnosis
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Check the relay wire between the
indoor unit and the outdoor unit
for color and number
Is there any improper
wiring?
NO
Is the insulation
between relay wire and
the insulation to the
earth properly?
Properly
Does the distance of
relay wire exceed
30 m?
NO
Check outdoor unit LED A
Does it flashing?
Flashing
Disconnect No. 3
Measure the voltage between 2
and 3 (Apply negative terminal to
No. 2 in DC range)
Is the measured
value 30 to 50 V?
NO
(below 30 V or above 50 V)
YES
* For the machine with stand-
by power saving function,
perform setting of fan
operation to release the
stand-by power function.
Poor insulation
YES
It glows or not
YES
Troubleshooting
Correct relay wire between
indoor and outdoor unit.
Voltage
7 sec. 15 sec. Stop
Power on Check during
Fault
this period
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 outdoor unit
PCB.
(R9435)
121