Outdoor Fan Pcb Abnormality - Daikin Aurora Series Service Manual

SiUS341802E

2.40 Outdoor Fan PCB Abnormality

H7
Error Code
Applicable
RXLQ72-120TAYCU, RXYQ72-168TAYCU
Models
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
∗1: Fan PCB and connectors
Note:
Service Diagnosis
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 (A6P) Master / Slave 1 / Slave 2
H7-22/24/26: Fan PCB (A5P) 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)
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.
Fan motor Fan PCB
M1F A6P
M2F A5P
NO
YES
NO
YES
Connector
X1A
X1A
Troubleshooting by Error Code
Properly connect the connector.
Replace the relevant fan motor.
Replace the fan PCB. (∗1)
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