Samsung EH035CAV Service Manual page 143

Troubleshooting
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
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?
detection of DC Link voltage normal?
Is the reactor insulation damaged?
12-17
141 Kinderkamack Rd, Park Ridge, NJ 07656 Tel: 201-782-1782 Fax: 201-782-1783 Web: www.amgair.com Email: info@amgair.com
Restart after power off.
Yes
Yes
Yes
Reassembly the PCB.
Yes
Is the appearance of
DC Link Capacitor normal?
Yes
Is the resistance for the
Yes
Is the resistance value of
DC Link discharge normal?
Yes
Yes
Exchange the reactor.
No
No
No
No
No
No
No
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Terminate the service.
Terminate the service.
Exchange the PCB.
Exchange the PCB.
Exchange the PCB.
Exchange the PCB.
Exchange the PCB.
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