Outdoor Fan Pba Overvoltage / Low Voltage Error - Samsung AM080FX A Series Service Manual

Troubleshooting
4-3 Appropriate Measures for Different Symptom (cont.)

4-3-52 Outdoor Fan PBA Overvoltage / Low voltage error

Outdoor unit display
Judgment Method ∙ DC-Link Overvoltage / Low voltage occurs.
Cause of problem ∙ Check the status of DC LINK Connector
1. Cause of problem
ㆍ Be careful when you check DC voltage.(600Vdc ↑ )
How to check voltage from DC LINK connector disconnect from FAN PBA.
→ⓐ Turn off the MAIN Power
→ⓑ Disconnect the DC LINK connector from FAN PBA
→ⓒTurn on the MAIN Power
→ⓓCheck voltage of connector
Standard voltage range of DC and AC
AC Input Voltage
208~230V
460V
380~415V
Check AC Voltage
of the Power terminal?
[Refer to Standard AC Voltage ]
Check DC voltage of
DC LINK connector disconnect from FAN PBA
[Refer to Standard DC Voltage]
Check the status of DC LINK Connector
Replace FAN PBA
Samsung Electronics
Standard
AC Voltage(Vac)
Min.
187
414
342
(If the voltage is out of Std. range)
OK
(If the voltage is out of Std. range)
OK
OK
Max.
253
506
457
NG
Check AC Voltage of Power source
NG
NG
Replace connected wire
DC power wire (Inv. PBA)
Standard
DC Voltage(Vdc)
Min. Max.
265 358
585 715
484 646
DC power wire (Fan PBA)
217