Samsung AS09HPB, Service Manual

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Troubleshooting
Samsung Electronics 12-18
12-2-16 DC Link Over voltage/ Low voltage error
1. Checklist :
1) Is the power voltage normal?
2) Is the voltage of front and back terminal of indoor(outdoor) 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
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Restart after power off.
Terminate the service.
No
No
Is the DC Link voltage error occurred again?
Terminate the service. Is the power voltage normal?
Exchange the PCB.
No
Is the front and back terminal voltage of
indoor/outdoor power relay normal?
Exchange the PCB.
No
Is the appearance of
DC Link Capacitor normal?
Exchange the PCB.
No
Is the resistance for the
detection of DC Link voltage normal?
Exchange the PCB.
No
Is the resistance value of
DC Link discharge normal?
Exchange the PCB.
No
Is the reactor insulation damaged?
Exchange the reactor.
Reassembly the PCB.
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