Daikin VRV RXYQ72-384XAYCA Service Manual page 245

SiUS342004EB
3.7.2 Indoor Fan Motor Abnormality (FXDQ-M, FXHQ-M Models)
Applicable
FXDQ-M, FXHQ-M
Models
A6
Error Code
Method of Error
This error is detected if there is no revolution detection signal output from the fan motor.
Detection
Error Decision
When no revolutions can be detected even at the maximum output voltage to the fan
Conditions
Supposed
 Defective indoor fan motor
Causes  Broken wires
 Defective contact
Troubleshooting
Reference
CHECK 16 Refer to page 372.
Part 6 Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Is the X4A
NO
connector securely
connected?
YES
Is
the
power of 12
VDC supplied
between the Pins 1
YES
and 3 when the X4A is
disconnected and the
power supply
turns ON?
NO
Troubleshooting by Error Code
Properly connect the
connectors.
(At this time, check for any
defective connector contact or
broken wires.)
CHECK 16
Check the indoor fan motor
(M1F) and the wiring circuits of
the motor.
Replace the indoor unit control
PCB (A1P).
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