Ac Input Voltage Sensor Error - (E488) - Samsung AC024BXUPCH Service Manual

4-2-19. DC Link voltage under/over error - (E466)
Overvoltage of H/W detect DC Link error - (E483)

AC Input voltage sensor error - (E488)

Outdoor unit display
Judgment Method
Cause of problem
1. Test items
1) Check the power connection. / Check the restart after power reset.
→ Is there a fault in input power? (Single phase: 208-230Vac)
→ 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
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. → End the service.
Samsung Electronics
, ,
Refer to checking method, as shown below.
Power OFF
Yes
Yes
Yes
No
No
Reconnect the power wire.
1. Check the connecting wires. (between the reactor wire
and the Inverter PCB wire of the outdoor unit) → Check
No
the normal operation. → End the service
2. Replace the reactor. → Check the normal operation. →
End the service.
Yes
Replace the fuse.
1. Fasten the screws between Terminal Block and power
wire. → Check the normal operation. → End the service.
Yes
2. Connect the terminal of the Power Terminal Box and
the power wire. → Check the normal operation. → End
the service.
Troubleshooting
4-27