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

SiUS371614E

3.31 Outdoor Fan Motor Abnormality

E7
Error Code
Applicable
All outdoor unit models
Models
Method of Error
Detection
Error Decision
Conditions
Supposed
Causes
Troubleshooting
Service Diagnosis
Detect according to the value of current flowing through the inverter PCB (or fan PCB in case of
Fan Motor 2).
Detect error of the fan motor system according to the fan revolutions detected by the hall IC
during the fan motor runs.
Overcurrent is detected from the inverter PCB or the fan PCB (Detecting overcurrent 4 times will
shut down the system).
The fan revolutions fall below a given level for a period of 6 seconds while in fan motor rotation
mode (Detecting shortage of revolutions will shut down the system).
Fan motor failure
Neglect to connect or defective connection of harness/connector between the fan motor and the
PCB
Fan does not rotate due to foreign matter caught in it.
Clearing condition: fan motor performs normal operation for a period of 5 minutes
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Check in Monitor Mode
8-14 ton classes are equipped with 2 compressors.
Check for the compressor 1 or 2 applicable to the error code
E7 while in monitor mode of the outdoor unit PCB.
Turn OFF the power supply, and then wait for a period of 10 minutes.
There are
foreign matter around the
applicable fan.
NO
Check for Connection of Connector
Check for the connections of all fan motor connectors.
Some connectors are
disconnected.
NO
Check for Colors of Junction Connectors
Check for any wire connection errors in 2 units of fan motors.
Fan motor 1: Power supply cables and signal cables are all white.
Fan motor 2: Power supply cables and signal cables are red on
the PCB side and white on the motor side.
There is a junction relay
connection error.
NO
A
YES
YES
YES
Troubleshooting by Error Code
Remove the foreign matter.
Insert the connector.
Correct the connection of the
junction connector.
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