Daikin RXYQ96PYDN Service Manual page 407

Troubleshooting by Indication on the Remote Controller
Troubleshooting
*1. List of Inverter PC boards
392
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Turn OFF the power supply
once, and then check the
compressor lead wires.
lead wires have any
disconnection, broken wire,
short circuit, or ground
Turn ON the power supply
power supply normally
come back ON?
YES
single system applied
Single system
While in monitor mode, check
whether the system is right-
hand (control PC board 1) or
left-hand (control PC board 3).
∗
Check 4
Check if the power
transistor is
normal.
YES
∗
Check 4
Check if the power
transistor of the fan
driver is normal.
YES
∗
Check 4 : Referring to the information on P463.
Model
Compressor inverter PC board
RXYQ72, 96, 120PYDN, PTJU
REMQ72, 96, 120PYDN, PTJU
Fan inverter PC board
Compressor inverter PC board
REYQ72, 96, 120PYDN
REYQ72, 96, 120PTJU
Fan inverter PC board
REYQ144PTJU Compressor inverter PC board
RXYQ144PTJU Fan inverter PC board
Do the
YES
fault?
NO
again.
Does the
YES
NO
Is the
NO
to the outdoor
unit?
Multi system
While in monitor mode,
check the outdoor unit
concerned.
NO
Check if
insulation resistance of
the compressor is 100kΩ
and above.
YES
NO
Name
Replace the lead wires.
It is supposed that the malfunction
results from external causes other
than failures (e.g. exogenous
noises or thunder).
NO
Replace the compressor and
compressor inverter PC board
(A2P) at the same time.
Replace the inverter PC board
(A2P).
Replace the compressor inverter
PC board (A2P) and fan inverter
PC board (A5P).
Replace the inverter PC board
(A2P).
Electric symbol
A4P
A5P
A5P
A6P, A7P
A4P
A5P
SiUS34-801A_b
Troubleshooting