Troubleshooting
384
Samsung Electronics
4-4-60 3-phase Input Wiring error
1. Cause of problem
Replace Inverter PCB
Power Off
Yes
Yes
No
Yes
Did the Main
Terminal Block and Power R, S, T, N is
connected properly?
Power BOX Terminal : Check the phase-to-phase
connection 380V of the R, S, T and then restart.
(N-phase must be properly connected.)
No
No
No
Yes
Connection and then restart it
Low voltage error during this initial charge :
Replace Fuse, if the rectifier diode of the inverter
PCB is normal.
Connection and then restart it
Did the Reactor
Connection Terminal is connected
properly?
Did the EMI PCB Fuse is short?
Is EMI PCB CN21
connector and Inverter PCB accurately
connected?
Outdoor unit display
Indoor unit display
Criteria
. When turn on the power and check the status of the power from the inverter.
If the phase does not connect the power(no phase) : E425 or E466 (E366) is displayed (Air conditioner to maintain the
normal state.)
However) N-phase must be properly connected.
Cause of problem
∙ Check the input wiring
∙ EMI Fuse short
