Daikin RTSQ20PY1 Service Manual page 316

Troubleshooting by Indication on the Remote Controller
Troubleshooting
305
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Diagnosis Flow 1
Confirmation of Confirmation of
malfunction 3 malfunction 4
Check if any disconnection
or connection error is
detected in connecting
wires with external control
adaptor.
NO
Check if the normal
condition monitor LED
for the outdoor unit
PCB blinks.
YES
Check if the normal
condition monitor LED
for the external control
adaptor blinks.
YES
YES
NO Check if power is
supplied to the
outdoor units.
YES
Check if the power
NO
supply wire for the
external control adaptor
is connected to 5V
supply line.
YES
SiBE31-801_C
Correct the connecting wiring
with the external control
adaptor.
NO
Supply power to the outdoor
unit.
Replace the outdoor unit main
PCB.
NO
Connect the power supply wire
for the external control adaptor
to 5V supply line.
Replace the PCB of the external
control adaptor.
Replace the outdoor unit main
PCB.
Troubleshooting