Daikin Aurora Series Service Manual page 230

Troubleshooting by Error Code
2.33.2 Outdoor Fan Motor Abnormality (575 V Models)
E7
Error Code
Applicable
RXLQ72-120TAYCU, RXYQ72-168TAYCU
Models
Method of Error Detects according to the value of current flowing through the fan PCB.
Detection
Error Decision
Conditions
Supposed
Causes
Troubleshooting
217
Overcurrent is detected from the fan PCB (Detecting overcurrent 4 times will shut down the
system).
Current does not increase at fan motor startup or while the fan motor is in operation (Detecting 4
times 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
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 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. (∗1)
Some connectors are
disconnected.
NO
Check for Colors of Connectors
Check for any wire connection errors in 2 fan motors.
M1F: Connectors are white both on the PCB side and motor side.
M2F: Connectors are white on the PCB side and red on the motor side.
There is a relay
connection error.
NO
There is no
continuity across the
fuse (F101U) on the fan
PCB.
NO
A
Go to the next page.
YES
YES
YES
YES
SiUS341802E
Remove the foreign matter.
Insert the connector.
Correct the connection of the
relay harness.
Replace the fan PCB (A5P, A6P).
Service Diagnosis