Daikin VRV EMERION RXYQ-AATJA, Service Manual

Page: 326 / 429

Troubleshooting by Error Code SiUS342303E
319 Part 6 Service Diagnosis
3.46 Outdoor Fan PCB Abnormality
Applicable
Models
All outdoor unit models
Error Code
H7
Method of Error
Detection
Detect with current sensor value.
Error Decision
Conditions
When the current sensor shows abnormality.
Supposed
Causes
Defective fan PCB
Troubleshooting
Properly connect the connector.
NO
YES
Replace the relevant fan motor.
(M1F, M2F)
NO
YES
Check for fan PCB applicable to the error code H7 while in
monitor mode.
H7-21/23: Fan PCB (M1F) Master / Sub
H7-22/24: Fan PCB (M2F) Master / Sub
Replace the fan PCB.
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Is the
connector of relevant
fan motor normally
connected?
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.
Turn OFF the power supply
and wait for 10 minutes.