Troubleshooting
4-92 Samsung Electronics
1.
Cause of problem
4-4-58 3-phase Input Wiring error
Outdoor unit display
Indoorunit display
×(Operation) ስ (Reservation) ስ (Blast) ስ (Filter) ×(Defrost)
Judgment Method
. 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
Replace Inverter PCB
Power Off
Ye s
Ye s
No
Ye s
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
Ye s
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?
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