Daikin REYQ8-48PY1B, Service Manual

Page: 363 / 477

SiBE37-701_B Troubleshooting by Indication on the Remote Controller
Troubleshooting 352
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Correct the connecting wiring
with the external control adaptor
for outdoor unit.
Check if any disconnection or
connection error is detected in
connecting wires with external
control adaptor for outdoor
unit.
Confirmation of malfunction 3 Confirmation of malfunction 4
Diagnosis Flow 1
Check if the normal
condition monitor LED
for the outdoor unit
PCB blinks.
Check if power is
supplied to the
outdoor units.
Check if the normal
condition monitor LED for
the external control adaptor
for outdoor unit blinks.
Check if the power supply wire
for the external control adaptor
for outdoor unit is connected to
5V supply line.
YES
NO
NO
NO
YES YES
NO NO
YES
YES
Supply power to the outdoor
unit.
Replace the outdoor unit main
PCB.
Connect the power supply wire
for the external control adaptor
for outdoor unit to 5V supply
line.
Replace the PCB of the external
control adaptor for outdoor unit.
Replace the outdoor unit main
PCB.