Troubleshooting
4-118
Samsung Electronics
4-4-76 Overvoltage / Low voltage error
Outdoor unit display
(INVERTER1 PCB)
(INVERTER2 PCB)
Judgment Method
∙ N-phase wiring error and EMI Fuse short.
∙ DC-Link Overvoltage / Low voltage occurs.
Cause of problem
∙ Check the input wiring
∙ EMI Fuse short
Power Off
Yes
Yes
380V is the voltage
between terminal blocks
R, S, T wire?
Power R, S, T, N wire voltage check and restart it.
Replace Inverter PCB and then restart it.
* Check the 3-phase sensing circuit part.
Replace Fuse, if the rectifier diode of
the inverter PCB is normal.
No
No
Did the EMI PCB Fuse is short?
1. Cause of problem
Содержание AM032MNQDCH/AA
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