Daikin REYQ8-48PY1B, Service Manual

Page: 358 / 477

Troubleshooting by Indication on the Remote Controller SiBE37-701_B
347 Troubleshooting
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Press the rewiring 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.)
Check the detailed malfunction
status in the monitor mode.
(Refer to P.257~P.258 for
how to check.)
NO
In Confirmation of
malfunction 4, LED lamp
indicates as follows:
Check if indoor unit PCB or outdoor
unit PCB has been replaced. Or
check if indoor/ outdoor, outdoor/
outdoor connecting wires are
normal.
Check if all the indoor
remote controllers within the
same refrigerant circuit
display “
U4
”.
Reset the power supply here.
Check if the normal condition
monitor for the micro-computer
(HAP) on the outdoor unit PCB
blinks.
Check if the LED in
preparation mode (H2P)
on the outdoor unit PCB
blink.
Lights do not go
out for 12 minutes
or more.
Check if the indoor/
outdoor, outdoor/ outdoor
connecting wires are
normal.
Check if the operation is normal
with 1 circuit after outdoor/
outdoor connecting wires are
removed.
Check if the indoor/
outdoor, outdoor/
outdoor connecting wires
are normal.
Check if the voltage
between RS terminals on
the outdoor unit PCB is
200V.
The fuse on the
outdoor unit
PCB is blown.
YES
YES
NO
NO
YES
NO
YES
NO
NO
YES
YES
NO
NO
YES
YES
YES
NO
NO
NO
YES
YES
Go on to the next page.
LED lamp display
Replace the indoor unit PCB.
Correct the connecting wires.
Correct the voltage (200V).
Replace the fuse.
Replace the outdoor unit PCB.
Press the rewiring button on the
main PCB of the outdoor unit.
Keep pressing for 5 seconds or
more.
Correct the connecting wires.
Replace the main PCB of outdoor
unit.
Fix DIII-Net expander adaptor.