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Troubleshooting
4-4-19. 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 correctlyconnected?
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 wire and the Inverter PCB wire of the
outdoor unit)
No
End the service
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.
4-50
Reconnect the power wire.
Check the normal operation.
Check the normal
End the service.
Replace the fuse.
Check the normal operation.
Check the normal
End the service.
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