Fan Motor Overcurrent Error - Samsung AM072/096/120/144FXVAFH Service Manual

4-4-50 Fan Motor Overcurrent error

Outdoor unit display
∙ Occurs when overcurrent flows in the IPM.
Judgment Method
∙ Detected by H/W or S/W
∙ Defective FAN PCB
Cause of problem ∙ Connector error
∙ Defective Motor
1. How to check
Power Off
Is the resistance value
between different phases of Fan Motor
(U V, V W, W U) less than 10Ω?
Is the resistance between the body of
Fan Motor and chassis MΩ?
Is the Fan Motor wire properly
connected to FAN PCB?
Replace Fan PCB
Samsung Electronics
(FAN PCB(FAN1))
(FAN PCB(FAN2))
Yes
Yes
Yes
Yes
FAN Motor Connector
No
Replace Outdoor Fan Motor
No
Replace Outdoor Fan Motor
No
Reconnect wires(Housing – Connector)
Fan PCB wire connection
Hall-sensor Connector
Troubleshooting
[FAN PCB]
Hall-sensor Connector
4-107