Daikin RQYQ140-180PY1 Service Manual page 172

Troubleshooting by Remote Controller
Troubleshooting
163
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Check the detailed
malfunction status in the
monitor mode.
(Refer to P.106~P.107)
In
Confirmation
of malfunction 4,
LED lamp indicates NO
as follows:
YES
Check if
indoor unit PCB or
outdoor unit PCB has been
YES
replaced. Or check if indoor/outdoor,
outdoor/ outdoor connecting
wires has been
modified.
NO
Check
if all the indoor
NO
remote controllers within the
same refrigerant circuit
U4
display " ".
YES
Reset the power supply.
Check
if the normal condition
NO
monitor for the micro-computer
(HAP) on the outdoor unit
PCB blinks.
YES
Check if
the LED in preparation NO
mode (H2P) on the outdoor
unit PCB
blink.
YES
Lights do not
YES
go out for 12 minutes
or more.
NO
Check if
the indoor/ outdoor,
NO
outdoor/ outdoor connecting
wires are normal.
YES
Check if
the operation is normal
NO
with 1 circuit after outdoor/outdoor
connecting wires are
disconnected.
YES
Check if the
YES
indoor/ outdoor, outdoor/
outdoor connecting wires
are normal.
NO
Check if the
NO
voltage between R, S
terminals on the outdoor unit
PCB is 400V.
YES
The fuse on
YES
the outdoor unit PCB
is blown.
NO
SiBE341001
Go on to the next page.
LED lamp display
( )
Press the RESET button on the
main PCB of the master outdoor
unit. Keep pressing for 5 seconds
or more. (Operation does not start
for a maximum 12 minutes.)
Replace the indoor unit PCB.
Correct the connecting wires.
Correct the voltage (400V).
Replace the fuse.
Replace the outdoor unit PCB.
Press the RESET button on the
main PCB of the outdoor unit main
PCB. Keep pressing for 5 seconds
or more.
Correct the connecting wires.
Replace the outdoor unit main
PCB.
Install DIII-Net extension adaptor.
Troubleshooting