Viessmann Vitoplus 300 Service Instructions Manual page 82

Wall mounted oil fired condensing boiler for the combustion of low sulphur fuel oil din 51603-el-1 with integral boiler control unit
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Troubleshooting
Repairs
(cont.)
Checking the fuse
1. Switch OFF the power.
2. Release the lateral closures and
pivot the control unit down.
82
3. Remove cover A.
4. Check fuse F1.

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