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SiUS372201EB
3.51 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
Causes
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 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
Turn OFF the power supply
and wait for 10 minutes.
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.
NO
YES
NO
YES
Troubleshooting by Error Code
Properly connect the connector.
Replace the relevant fan motor.
(M1F, M2F)
Replace the fan PCB.
392
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