Daikin RQYQ140-180PY1 Service Manual page 180

Troubleshooting by Remote Controller
Troubleshooting
171
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Diagnosis Flow 9
Confirmation of malfunction 3 Confirmation of malfunction 4
Is there
any wrong connection
between indoor and outdoor,
between indoor and indoor
and on the outdoor
multi.
YES
Is the
connection capacity
of the indoor unit below
the specified
level?
YES
Diagnosis Flow 10
Confirmation of malfunction 3 Confirmation of malfunction 4
Check if
any disconnection or
connection error is detected in
connecting wires with external
control adaptor for
outdoor unit.
YES
Is the
normal operation
monitor LED on the BS
PCB blinking?
YES
Check if
the normal condition monitor
LED for the external control
adaptor for outdoor
unit blinks.
YES
NO
NO
NO
NO
Is the power supplied
to BS?
YES
Check if
the power supply
NO
wire for the external control adaptor
for outdoor unit is connected to
5V supply line.
YES
SiBE341001
Correct the connection wiring
and reset the power.
Check the connection capacity
of the indoor unit.
Replace the outdoor unit PCB.
Correct the connecting wiring
with the external control adaptor
for outdoor unit.
NO
Turn on the power of BS.
Replace the BS unit 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 BS unit PCB.
Troubleshooting