Troubleshooting
67
Correction
(continued)
Check fuses
Power pump module fuse
1.
Switch off main power supply.
2.
Flip down and remove control unit
.
3.
Remove power pump module cover
plate
.
4.
Check fuse F1 T6.3A (slow blow).
Replacements available form
Viessmann - package of 10
(PN 7815 580).
Control unit fuse
1.
Switch off main power supply.
2.
Flip down control unit.
3.
Remove cover
.
4.
Check fuse F1 T4.0A (slow blow).
Replacements available form
Viessmann - package of 10
(PN 7404 364).
5
5
8
1
7
7
5
1
.3
¾”/20mm
¼”/5mm
Fuse F1 T6.3A
A
F1 T4.0A
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