Daikin VRV RXYQ72-384XAYCA Service Manual page 299

SiUS342004EB
Troubleshooting
Part 6 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
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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