Outdoor Fan Motor Signal Abnormality - Daikin VRV Aurora RXLQ-TATJU Series Service Manual

Troubleshooting by Error Code

3.45 Outdoor Fan Motor Signal Abnormality

Applicable
RXLQ72-120TATJU, RXLQ72-120TATJA, RXLQ72-120TBTJA, RXLQ72-120TAYDU,
Models
RXLQ72-120TAYDA, RXLQ72-120TBYDA
H7
Error Code
Method of Error
Detect of abnormal signal from fan motor.
Detection
Error Decision
An abnormal signal is detected at startup of the fan motor operation.
Conditions
Supposed
 Abnormal signal from fan motor (Circuit failure)
Causes  Disconnection/Short circuit in fan motor leads or disconnection of connector
 Defective inverter PCB (A3P)
Troubleshooting
Reference
CHECK 17 Refer to page 388.
305
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Check for fan motor applicable to the error code H7 while in
monitor mode.
Sub code
H7-01/05: Fan motor 1 (M1F) Master / Slave 1
H7-02/06: Fan motor 2 (M2F) Master / Slave 1
Turn OFF the power supply.
Is the
connector of
signal cable of the
relevant fan motor
normally
connected?
YES
CHECK 17
Check for the connector
of the fan motor.
Is
resistance
between Vcc and
UVW and between GND
and UVW of the fan
motor lead in
balance?
YES
NO
Properly connect the connector.
NO
Replace the fan motor (M1F, M2F).
Replace the fan PCB (A4P, A5P).
SiUS341802EC
Part 6 Service Diagnosis