Daikin RXYQ96PYDN Service Manual page 384

R-410a heat pump 60hz, r-410a heat recovery 60hz
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SiUS34-801A_b
Troubleshooting
Troubleshooting
A
No continuity
of fuse (FIU) on the fan
inverter PC board.
NO
Unable to
rotate the fan manually
with ease when removing
the connector of the
fan motor.
NO
Resistance
value between the power
supply wire terminal of fan motor
and the motor frame (metal) is
1MΩ and below.
NO
(Referring to the information on P461)
Check 1
Check fan motor connector (power supply wire)
The resistance
value between UVW phases
of fan motor is out of balance, or
short circuit between
UVW phases.
NO
(Referring to the information on P461)
Check 2
Check fan motor connector (signal wire)
The signal
wire short circuits
between Vcc and GND
and between UVW
and GND.
NO
Put the power supply ON to check the following
LED lamps.
1) HAP lamp on the compressor PC board (A2P)
2) HAP lamp on the fan inverter PC board (A5P)
HAP lamp
for the A5P does not
blink on the condition that
HAP lamp for A2P
is blinking.
NO
Troubleshooting by Indication on the Remote Controller
YES
YES
YES
YES
YES
YES
Replace fan inverter PC
board.
Replace the corresponding
fan motor.
Replace the corresponding
fan motor.
Replace the corresponding
fan motor.
Replace the corresponding
fan motor.
Replace fan inverter PC
board.
Replace fan motor 2.
369

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