Dc-Link Voltage Under/Over Error - E466 - Samsung AQV12NSAN Service Manual

4-3-21 DC-Link Voltage under/over error
1. Checklist :
1) Is the power voltage normal?
2) Is the voltage off ront and back terminal ofi ndoor power relay normal?
3) Is the resistance value for DC Link voltage detection NORMAL?
4) Is the resistance value of DC Link discharge normal?
5) Is the appearance of DC Link Capacitor normal?
2. Troubleshooting procedure
Restart after power off.
Is the DC Link voltage error occurred again?
Is the power voltage normal?
Is the front and back terminal voltage of
indoor/outdoor power relay normal?
Reassembly the PCB.
Is the appearance of
DC Link Capacitor normal?
Is the resistance for the
detection of DC Link voltage normal?
Is the resistance value of
DC Link discharge normal?
Is the reactor insulation damaged?
Exchange the reactor.
4-24
When
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
is displayed
No
Terminate the service.
No
Terminate the service.
No
Exchange the INDOOR PCB.
No
Exchange the OUTDOOR PCB.
No
Exchange the OUTDOOR PCB.
No
Exchange the OUTDOOR PCB.
No
Exchange the OUTDOOR PCB.
Samsung Electronics