Daikin RXYQ96PYDN Service Manual page 420

SiUS34-801A_b
Troubleshooting
Troubleshooting
A
The fuse
F400U of the A3P has been
molten down.
NO
Disconnect the sensor connector
(X2A or X4A) from the fan motor,
and then turn ON the power supply.
Is any
malfunction code
LC
other than " "
displayed?
NO
The
microcomputer
normal monitor (green)
of the main PC board (A1P)
is blinking.
YES
The
microcomputer
normal monitor (green)
of the main PC board (A4P)
is blinking.
YES
The LC malfunction recurs.
NO
Troubleshooting by Indication on the Remote Controller
YES
Replace the noise
filter of the A3P.
YES
NO
NO
YES
F400U
Take countermeasures
following the displayed
malfunction code.
Not the LC malfunction.
Check the malfunction
code again.
Replace the inverter PC
board (A4P).
* If the replaced PC board has
significant damage, the compressor
is probably get faulty. In this case,
carry out inspections on the
compressor again.
Replace the main PC
board (A1P).
Continue operation.
(It is supposed that the
malfunction results
from causes such as
instantaneous power
failure.)
405