Samsung AQ09VFUAGM/CV Service Manual page 86

Current sensor error/Input current sensor error
Indoor display
Outdoor display
1.Checklist :
1) Is the PFC Shunt(A*V18***:R062,R063,A*V24***:R807,R808,R809) resistance value correct? Check the resistor is opened
2) Is the IPM Shunt(A*V18***:R451,R452,R453,A*V24***:R413,R414,R415) resistance value correct? Check the resistor is opened
3) Is there no short or open around IC451(A*V18***) or IC451,IC452(A*V24***)?
2. Troubleshooting procedure
Restart a er power o .
Is the PFC shunt and IPM shunt
resistance value correct?
YES
Is the current sensor error
appeared again?
YES
Exchange the Outdoor PBA
Outdoor error
Current sensor error/Input
sensor error
NO
NO
current
Exchange the Outdoor PBA
Terminate the service
12-19