Daikin VRV II-Q RQYQ8-48PY1B Service Manual page 172

Troubleshooting by Remote Controller
Troubleshooting
162
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Diagnosis Flow 1
Confirmation of error 3 Confirmation of error 4
Check if any disconnection or
connection error is detected
in connecting wires with
external control adaptor for
outdoor unit.
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 for outdoor
unit blinks.
YES
YES
Check if power is
NO
supplied to the outdoor
units.
YES
Check if the power supply
NO
wire for the external control
adaptor for outdoor unit is
connected to 5V supply
line.
YES
SiBE341027
Correct the connecting wiring
with the external control adaptor
for outdoor unit.
NO
Supply the power to the outdoor
unit.
Replace the outdoor unit main
PCB.
NO
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.
Service Diagnosis