Outdoor Fan Motor Signal Abnormality - Daikin REYQ-TA Series Service Manual

SiUS371614E

3.37 Outdoor Fan Motor Signal Abnormality

H7
Error Code
Applicable
All outdoor unit models
Models
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
Causes
Troubleshooting
CHECK 17
Service Diagnosis
Abnormal signal from fan motor (Circuit failure)
Disconnection/Short circuit in fan motor leads or disconnection of connector
Defective inverter PCB (A3P, A6P)
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
H7-01/05/09: Fan motor 1 (M1F) Master / Slave 1 / Slave 2
H7-02/06/10: Fan motor 2 (M2F) Master / Slave 1 / Slave 2
Turn OFF the power supply.
Is the
connector of
signal cable of the
relevant fan motor
normally
connected?
CHECK 17
Check for the connector
of the fan motor.
resistance
between Vcc and
UVW and between GND
and UVW of the fan
motor lead in
balance?
Refer to page 287.
NO
YES
Is
NO
YES
Troubleshooting by Error Code
Properly connect the connector.
Replace the fan motor.
Replace the fan PCB.
1
REYQ72TA: A4P
REYQ96-168TA: A4P, A7P
224