3-Phase Input Wiring Error - Samsung AM007FN1DCH/AA Service Manual

4-4-58 3-phase Input Wiring error

Outdoor unit display
Indoorunit display ×(Operation)
. When turn on the power and check the status of the power from the inverter.
Judgment Method
∙ 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
Samsung Electronics
(Reservation)
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.
Power Off
Did the Main
connected properly?
Yes
Did the Reactor
properly?
Yes
No
Is EMI PCB CN21
connected?
Yes
Replace Inverter PCB
(Blast) (Filter) ×(Defrost)
Power BOX Terminal : Check the phase-to-phase
No
connection 380V of the R, S, T and then restart.
No
No
Replace Fuse, if the rectifier diode of the inverter
Yes
(N-phase must be properly connected.)
Connection and then restart it
Low voltage error during this initial charge :
PCB is normal.
Connection and then restart it
Troubleshooting
4-97