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

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

4-3-48 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
Power Off
Is Power connection accurately conected
Is EMI PBA R,S,T Wire and Terminal-block
connector accurately connected?
Did the Fuse is open
Is Reactor accurately connected
Is Inverter PBA R,S,T Wire and EMI PBA CN21
connector accurately connected?
Replace Inverter PBA
Type of Power AC Input
Source Voltage
F 208~230V
J 460V
Samsung Electronics
(INVERTER1 PBA)
(INVERTER2 PBA)
Yes
Yes
Yes
Yes
Yes
Standard AC Voltage(Vac)
Min. Max.
177 265
391 552
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)
Min. Max.
250 374
553 781
EMI PBA R,S,T Wire and
Terminal-block connector
212