Daikin AT12BV1LS Pocket Manual page 144

Si10-417
Trouble
shooting
Check No.10
Refer to
P.162
Service Diagnosis
Be sure to turn off power switch before connect or
Caution disconnect connector, or parts damage may be occurred.
Check the indoor unit-outdoor
unit connection wires.
Is there any wiring
error?
NO
Check the outdoor unit's LED
A.
Is LED A flashing?
YES
Check the voltage of the
indoor unit-outdoor unit
connection wires between No.
1 and No. 2, and between No
2 and No. 3.
Is the voltage 0 V?
NO
Check No. 10
Check power supply waveform.
Is there any
disturbance?
YES
Troubleshooting
YES
Correct the indoor
unit-outdoor unit
connection wires.
NO
Diagnose the outdoor
unit.
YES
Replace the
connection wires
between the indoor
and outdoor units.
NO
Replace indoor unit
control PCB .
Locate the cause of the
disturbance of the
power supply
waveform, and correct
it.
(R2840)
143