Samsung AM072FXVAFH series - 3-Phase Input Wiring Error

Troubleshooting
Samsung Electronics 4-79
4-4-34-phase Input Wiring error
Outdoor unit display
Indoorunit display
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 prop
erly connected .
Cause of problem
 Check the input wiring
 EMI Fuse short
Duct, Cassette (1/2 Way),Console, Celing Cassette (4/Mini4 Way) Wall-mounted (NeoForte)
Operation
Defrost TimerFan Filter/MPI
Operation
Defrost Timer Filter
Operation
TimerTurbo
××◑◑◑×◑◑◑ ● ◑◑
※ ● : ON ◑ : Flash ×: OFF
1.
How to check
Replace the MAIN PCB.
Connection and then restart it
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
Yes
Yes
Did the Reactor
Connection Terminal is connected
properly?
Did the Main
Terminal Block and Power R, S, T, N is
connected properly?
Low voltage error during this initial charge :
Replace Fuse, if the rectifier diode of the
inverter PCB is normal.
No
No
Did the EMI PCB Fuse is short?
Connection and then restart it
Yes
Yes
Is EMI PCB CN21
connector and Inverter PCB accurately
connected?
Power Off