Samsung UH035EAV Series, Service Manual

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Samsung Electronics
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12-2-15 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
Terminate the service.
Exchange the PCB.
Exchange the PCB.
Exchange the PCB.
Yes
Yes
Yes
No
No
Yes
Terminate the service.
No
Yes
Yes
Yes
Restart after power off.
Is the DC Link voltage error occurred again?
Is the front and back terminal voltage of
indoor/outdoor power relay normal?
Is the resistance for the
detection of DC Link voltage normal?
Exchange the reactor.
Is the appearance of
DC Link Capacitor normal?
Is the power voltage normal?
Reassembly the PCB.
Is the resistance value of
DC Link discharge normal?
Is the reactor insulation damaged?
Exchange the PCB.
Exchange the PCB.
Troubleshooting
12-17
25888A(1)_1.indd 46 2006-04-14 ｿﾀﾈﾄ 2:26:15