Daikin VRV Aurora RXLQ-TATJU Series Service Manual page 301

SiUS341802EC
Note(s)
1. Fan PCB: A4P, A5P
2. Inverter PCB: A3P
Part 6 Service Diagnosis
A
There
is no continuity
YES
across the fuse
(F101U) on the fan
PCB.
NO
The
fan cannot be
rotated by hand
YES
when disconnecting the
connector from the
fan motor.
NO
Resistance
between the fan
motor power supply
YES
cable terminal and the motor
frame (metallic part)
is less than
1 M.
NO
CHECK 16
Check for the connector (power
supply cable) of the fan motor.
Resistance
between U, V, W
phases of the fan motor power
supply cable has lost balance or
short circuit is caused
between U, V, W
phases.
NO
CHECK 17
Check for the connector
(signal cable) of the fan motor.
Signal
cable has
caused short circuit
between Vcc and Gnd,
and between UVW
and Gnd.
NO
Turn ON the power supply to check for the following LED lamps.
(1) HAP lamp on the inverter PCB (*2)
(2) HAP lamp on the fan PCB (*1)
The HAP
lamp on the inverter
PCB blinks, but does not
blink on the fan
PCB.
NO
U V W
(Red) (White) (Black)
  
YES
Gnd Vcc W V U
(Gray) (Pink) (Orange) (Blue) (Yellow)
    
YES
YES
Troubleshooting by Error Code
Replace the fan PCB. (*1)
Replace the relevant fan motor.
Replace the relevant fan motor.
Replace the relevant fan motor.
Replace the relevant fan motor.
Replace the fan PCB. (*1)
Replace the fan motor.
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