Check Fuses - Viessmann VITODENS 100-W Installation And Service Instructions Manual

Correction
(continued)

Check fuses

1.
Fuse F1 T6.3A
¾"/20mm
¼"/5mm
Fig. 73
2.
3.
4x
A
F4 T2.5A
Fig. 74
2x
1.
Troubleshooting
Power pump module fuse
1. Switch off main power supply.
2. Flip down and remove control unit
. Also refer to pages 37 and 38.
3. Remove power pump module cover
plate .
4. Check fuse F1 T6.3A (slow blow).
Replacements fuses are available
from Viessmann in packs of 10 (Part
No. 7815 580).
Control unit fuse
1. Switch off main power supply.
2. Flip down control unit.
3. Remove cover .
4. Check fuse F4 T 2.5A (slow blow).
Replacements fuses are available
from Viessmann in packs of 10 (Part
No. 7404 396).
IMPORTANT
The ON / OFF switch located on the
boiler does not disconnect power to
power / pump module, therefore the
main service switch or breaker must be
turned off.
71