Samsung AC052MN4DKH - Page 76

Troubleshooting
Samsung Electronics 4-41
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1. Test items
1) Check the power connection. / Check the restart after power reset.
ĺ Is there a fault in input power? (Single-phase : 220Vac, 3-phase : 380Vac)
ĺ Does error o
ccur again at operation after power is reset?
2) Check the connection of the power, and check whether the jointed power connection exists.
ĺ After having installed severa
l units, please check that communication wires are not interchanged with piping.
3) Check the reactor and its connecting wires.
4) Check the fuses of EMI PBA.
5) Check the Terminal Bl
ock and Power Terminal Box and the wire assembly.
2. Check procedure
Yes
Reconnect the power wire.
No
Is the power wire correctly connected?
1. Check the connecting wires. (between the
reactor wire and the Inverter PCB wire of
the outdoor unit)
ĺ Check the normal
operation.
ĺ End the service
2. Replace the reactor.
ĺ Check the normal
operation.
ĺ End the service.
No
Power OFF
Yes
Check the reactor and
its connecting wires.
1. Is the wire between the reactor and
the Inverter PCB of the outdoor unit correctly connected?
2. Is there any fault such as scr
atch,
pressing, broken or
loosened terminal?
1. Fasten the screws between Terminal Block
and power wire.
ĺ Check the normal
operation.
ĺ End the service.
2. Connect the terminal of the Power Terminal
Box and the power wire.
ĺ Check the
normal operation.
ĺ End the service.
Replace the fuse.
Yes
Yes
No
After replacing the Inverter PCB of the outdoor
unit, check for normal startup.
ĺ End the service.
Check the Terminal Block
and Power Terminal Box.
1. Is the screw of the terminal block firmly Fastened?
2. Are the power wire of the Power Terminal Box and
terminal firmly assembled?
Is EMI PCB fuse defective?
Yes