Daikin VRV II-Q RQYQ8-48PY1B Service Manual page 125

SiBE341027
Troubleshooting
Service Diagnosis
A
No continuity of
fuse (F1U) on
the fan INV.
PCB.
NO
Remove the fan
motor connector. Is
the fan rotatable
easily by hand?
NO
Resistance value between
the power supply wire
terminal of fan motor and
the motor frame (metal) is
1M Ω or less.
NO
CHECK 2
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
CHECK 3
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 PCB (A4P)
2) HAP lamp on the fan inverter PCB (A5P)
HAP lamp for the A5P
does not blink on the
condition that HAP lamp
for A4P is blinking.
NO
Refer to P.180
CHECK 2
CHECK 3 Refer to P.181
Troubleshooting by Remote Controller
YES
YES
YES
YES
YES
YES
Replace the fan INV. PCB.
Replace the corresponding
fan motor.
Replace the corresponding
fan motor.
Replace the corresponding
fan motor.
Replace the corresponding
fan motor.
Replace the fan INV. PCB.
Replace the fan motor 2.
115