3-Phase Input Wiring Error - Samsung AM072FXVAFH series Service Manual

4-4-34-phase Input Wiring error
Outdoor unit display
Operation Defrost
Indoorunit display
※ ● : ON ◑ : Flash ×: OFF
. 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. How to check
Power Off
Did the Main
Terminal Block and Power R, S, T, N is
connected properly?
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?
Replace the MAIN PCB.
Samsung Electronics
Duct, Cassette (1/2 Way),Console, Celing
Timer Fan
× × ◑ ◑
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.
Yes
Yes
No
Yes
Cassette (4/Mini4 Way)
Filter/MPI Operation Defrost Timer
◑ × ◑ ◑
No
No
No
Yes
Wall-mounted (NeoForte)
Filter Operation Timer Turbo
◑ ● ◑ ◑
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
Troubleshooting
4-79