Samsung AM038KXWDCH, Service Manual, Page: 136 / 295

Troubleshooting
Samsung Electronics 133
4-3-44 Overvoltage / Low voltage error
Outdoor unit display
(INVERTER1 PBA)
(INVERTER2 PBA)
Judgment Method
∙ Input wiring error EMI fuse open.
∙ DC-Link Overvoltage / Low voltage occurs.
Cause of problem
- Check the power source wiring. (R/S/T/N wire crossed or not connected)
- Check the power source voltage. (Rated voltage ±10%)
- Check the fuses on EMI PBA. (fuse is normally short)
1. Cause of problem
Power Cable re-connection
No
Yes
Is Power connection accurately conected
Power Off
Check the connector
connection
No
Yes
Is EMI PBA R,S,T Wire and Terminal-block
connector accurately connected?
Replace Fuse or EMI PBA
No
Yes
Did the Fuse is open
No
Yes
Is Reactor accurately connected
Check the Reactor
connection
No
Yes
Is Inverter PBA R,S,T Wire and EMI PBA CN21
connector accurately connected?
Power Off and then
re-connection
Replace Inverter PBA
Type of Power
Source
AC Input
Voltage
Standard AC Voltage(Vac) Standard DC Voltage(Vdc)
Min. Max. Min. Max.
F 208~230V 177 265 250 374
J 460V 391 552 553 781
4-3 Appropriate Measures for Different Symptom (cont.)