Daikin VRV Aurora RXLQ-TATJU Series Service Manual page 303

SiUS341802EC
3.39.2 Outdoor Fan Motor Abnormality (575 V Models)
Applicable
RXLQ72-120TAYCU, RXLQ72-120TAYCA, RXLQ72-120TBYCA, RXYQ72-168TAYCU,
Models
RXYQ72-168TAYCA
E7
Error Code
Method of Error
Detects according to the value of current flowing through the fan PCB.
Detection
Error Decision
 Overcurrent is detected from the fan PCB (Detecting overcurrent 4 times will shut down the
Conditions
 Current does not increase at fan motor startup or while the fan motor is in operation (Detecting 4
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
Part 6 Service Diagnosis
system).
times 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
oreign 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
Go to the next page.
A
YES
YES
YES
YES
Troubleshooting by Error Code
Remove the foreign matter.
Insert the connector.
Correct the connection of the
relay harness.
Replace the fan PCB (A5P, A6P).
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