Troubleshooting
4-4-60 3-phase Input Wiring error
Outdoor unit display
Indoor unit display
. When turn on the power and check the status of the power from the inverter.
Criteria
∙ Check the input wiring
Cause of problem
∙ EMI Fuse short
1. Cause of problem
Terminal Block and Power R, S, T, N is
Connection Terminal is connected
Did the EMI PCB Fuse is short?
connector and Inverter PCB accurately
108
If the phase does not connect the power(no phase) : E425 or E466 (E366) is displayed (Air conditioner to maintain the
However) N-phase must be properly connected.
Power Off
Did the Main
connected properly?
Yes
Did the Reactor
properly?
Yes
No
Is EMI PCB CN21
connected?
Yes
Replace Inverter PCB
Operation
Timer
normal state.)
No
No
No
Yes
Power BOX Terminal : Check the phase-to-phase
connection 380V of the R, S, T and then restart.
(N-phase must be properly connected.)
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
Samsung Electronics