Daikin RXYQ-TA Series Service Manual page 237

SiUS341615E
Troubleshooting
Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Check in Monitor Mode
12/14 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 is
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
There is no
continuity across the
fuse (F101U) on the fan
PCB.
NO
The fan
cannot be
rotated by hand when
disconnecting the connector
from the fan motor.
NO
Resistance
between the fan motor
power supply cable terminal and
the motor frame (metallic
part) is not more
than 1 MΩ.
NO
A
YES
YES
YES
YES
YES
YES
Troubleshooting by Error Code
Remove the foreign matter.
Insert the connector.
Correct the connection of the
junction connector.
Replace the fan PCB. ( 1)
1
RXYQ72TA: A4P
RXYQ96/120T: A4P, A5P
RXYQ144/168TA: A4P, A7P
Replace the relevant fan motor.
Replace the relevant fan motor.
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