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

Troubleshooting by Error Code

3.39 Outdoor Fan Motor Abnormality

3.39.1 Outdoor Fan Motor Abnormality (208/230 V Models, 460 V Models)
Applicable
RXLQ72-120TATJU, RXLQ72-120TATJA, RXLQ72-120TBTJA, RXLQ72-120TAYDU,
Models
RXLQ72-120TAYDA, RXLQ72-120TBYDA
E7
Error Code
Method of Error
 Detects according to the value of current flowing through the inverter PCB (or fan PCB in case
Detection
 Detects error of the fan motor system according to the fan revolutions detected by the Hall IC
Error Decision
 Overcurrent is detected from the inverter PCB or the fan PCB (Detecting overcurrent 4 times will
Conditions
 The fan revolutions fall below a given level for a period of 6 seconds while in fan motor rotation
Supposed
 Fan motor failure
Causes
 Neglect to connect or defective connection of harness/connector between the fan motor and the
 Fan does not rotate due to foreign matter caught in it.
 Clearing condition: fan motor performs normal operation for a period of 5 minutes
Troubleshooting
293
of M2F).
during the fan motor runs.
shut down the system).
mode (Detecting shortage of revolutions will shut down the system).
PCB
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Check in Monitor Mode
Outdoor units are equipped with 2 fan motors.
Check for M1F or M2F applicable to the error code E7 while in
monitor mode of the outdoor unit.
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 Connectors
Check for any wire connection errors in 2 units of fan motors.
M1F: Power supply cables and signal cables are all white.
M2F: Power supply cables and signal cables are red on the
PCB side and white on the motor side.
There is a relay
connection error.
NO
Go to the next page.
A
YES
YES
YES
SiUS341802EC
Remove the foreign matter.
Insert the connector.
Correct the connection of the
connector.
Part 6 Service Diagnosis