Outdoor Fan Pcb Abnormality - Daikin VRV RXYQ72-384XAYCA Service Manual

Troubleshooting by Error Code

3.44 Outdoor Fan PCB Abnormality

Applicable
All outdoor unit models
Models
H7
Error Code
Method of Error
Detect with current sensor value.
Detection
Error Decision
When the current sensor shows abnormality.
Conditions
Supposed
Defective fan PCB (A5P, A6P)
Causes
Troubleshooting
Note(s)
1. Fan PCB and connectors
Fan motor
M1F
M2F
301
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Check for fan PCB applicable to the error code H7 while in
monitor mode.
H7-21/23/25: Fan PCB for M1F Master / Slave 1 / Slave 2
H7-22/24/26: Fan PCB for M2F Master / Slave 1 / Slave 2
Turn OFF the power supply
and wait for 10 minutes.
Is the
connector of
relevant fan motor
normally connected?
(1)
YES
Resistance
between U, V, W
phases of the fan motor
power supply cable has lost
balance or short circuit is
caused between U,
V, W phases.
YES
Fan PCB Connector
A6P X1A
A5P X1A
NO
Properly connect the connector.
NO
Replace the relevant fan motor.
(M1F, M2F)
Replace the fan PCB. (1)
SiUS342004EB
Part 6 Service Diagnosis