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Samsung Electronics
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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
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
12-18
Summary of Contents for AQV09VBA Series
Page 28: ...MEMO Samsung Electronics 4 11 ...
Page 29: ...Samsung Electronics 5 1 5 Exploded Views and Parts List 5 1 Indoor Unit ...
Page 31: ...Samsung Electronics 5 2 Outdoor Unit 5 3 ...
Page 34: ...MEMO Samsung Electronics 5 6 ...
Page 35: ...Samsung Electronics 5 7 5 4 Ass y Control Out AQV09VBCX DB93 05534E AQV12VBCX DB93 05534F ...
Page 50: ...7 3 Samsung Electronics MEMO ...
Page 88: ...Samsung Electronics OUTDOOR FAN B D IGBT Block Diagram 13 4 DIODE IPM SMPS DC_LINK CAP ...