Samsung Electronics
4-31
4-4-11 DC_link voltage under/over error, Over voltage protection error/PFC over load
1.Checklist :
1) Is the input voltage of outdoor terminal block is normal?
2) Is the reactor wire connected?
3) Is the reactor wire connected?
4)
Is the DC_link capacitor(PF2:CE101,CE102,CE103,PF3:CE001,CE002,CE003,CE004)) assembled in accordance the specification? (Outdoor PBA)
5) Is the DC_link resistor(PF2:R104,R106,R107,R108,PF3:R004,R005,R006,R007) value is normal? (Outdoor PBA)
2. Troubleshooting procedure
Connect the reactor wire
No
Is the connected of reactor wire?
(PBA-Reactor)
Is the the input voltage is nomal?
Normal range(180Vac ~ 270Vac)
Is the reactor insulation damaged?
Check the input power in the powercord.
No
No
No
No
Check the input power
Exchange the Outdoor PBA
Exchange the Outdoor PBA
Is the DC_link voltage (CE101 or CE001) is normal in operation
mode?
Normal range(280Vdc~320Vdc)
Is the DC_link sensing voltage(R104 or R004) is normal in
operation mode?
Normal range (0.2Vdc~2.8Vdc)
Exchange the Reactor
Restart after power off.
Restart after power off.
Start the operation (cooling mode or heating
mode)
Yes
Yes
Yes
Yes
Yes
Yes
