Overvoltage / Low Voltage Error - Samsung AM080FXWANR Service Manual

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

4-3-44 Overvoltage / Low voltage error

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