Daikin VRV Aurora RXLQ-TATJU Series, Service Manual

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SiUS341802EC Troubleshooting by Error Code
Part 6 Service Diagnosis 296
3.39.2 Outdoor Fan Motor Abnormality (575 V Models)
Applicable
Models
RXLQ72-120TAYCU, RXLQ72-120TAYCA, RXLQ72-120TBYCA, RXYQ72-168TAYCU,
RXYQ72-168TAYCA
Error Code
E7
Method of Error
Detection
Detects according to the value of current flowing through the fan PCB.
Error Decision
Conditions

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).
Supposed
Causes

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
Troubleshooting
There are
I
oreign matter around the
applicable fan.
Remove the foreign matter.
YES
Check for the connections of all fan motor connectors. ( 1)
NO
Turn OFF the power supply, and then wait for a period of 10 minutes.
Some connectors are
disconnected.
Insert the connector.
YES
NO
NO
There is a relay
connection error.
Correct the connection of the
relay harness.
YES
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
A
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.
Check for Connection of Connector
Check for Colors of Connectors
There is no
continuity across the fuse
(F101U) on the fan
PCB.
Replace the fan PCB (A5P, A6P).
YES
NO
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.
Check in Monitor Mode
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