Samsung AC018KN4DCH Service Manual page 91

4-4-18. DC LINK over-current / low-voltage error (Error Code : E466)
H/W DC_Link Over Voltage Error (Error Code : E483)
AC Input Voltage Sensor Error (Error Code : E488
1. Test items
1) Check the power connection. / Check the restart after power reset.
Is there a fault in input power? (Single-phase : 220Vac, 3-phase : 380Vac)
Does error occur again at operation after power is reset?
2) Check the connection of the power, and check whether the jointed power connection exists.
After having installed several 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 Block and Power Terminal Box and the wire assembly.
2. Check procedure
Power OFF
Is the power wire correctly connected?
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 scratch, pressing,
broken or loosened terminal?
Is EMI PCB fuse defective?
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?
After replacing the Inverter PCB of the outdoor unit,
check for normal startup.
Yes
Yes
Yes
No
End the service.
No
1.Check the connecting wires. (between the reactor
No wire and the Inverter PCB wire of the outdoor unit)
Check the normal operation.
2. Replace the reactor.
operation.
Yes
1. Fasten the screws between Terminal Block and
power wire.
Yes End the service.
2. Connect the terminal of the Power Terminal
Box and the power wire.
operation.
4-51
Troubleshooting
Reconnect the power wire.
End the service
Check the normal
End the service.
Replace the fuse.
Check the normal operation.
Check the normal
End the service.