Samsung AM072BXV Series Service Manual page 148

Troubleshooting
4-3 Appropriate Measures for Different Symptom (cont.)
4-3-51 Outdoor Fan PBA Overvoltage / Low voltage error (cont.)
[Refer to Standard AC Voltage ]
DC LINK connector disconnect from FAN PBA
[Refer to Standard DC Voltage]
Check the status of DC LINK Connector
Is the resistance value between different phases
of Compressor(U ↔ V, V ↔ W, W ↔ U) less than
Is the resistance between the body of
Samsung Electronics
Power On
Check AC Voltage
of the Power terminal?
Yes
Check DC voltage of
Yes
Power Off
Yes
2Ω?
Yes
Compressor and chassis MΩ?
Yes
Replace FAN PBA
(If the voltage is out of Std. range)
No
Check AC Voltage of Power source
No
(If the voltage is out of Std. range)
No
Replace connected wire
No
Replace Compressor
No
Replace Compressor
DC power wire (INV PCB)
142