Viessmann B1HF - Checking the Fuse

92
Checking the fuse
A
F1
B
1.
2.
4.
3.
Fig. 50
1.
Switch ON/OFF switch
B
OFF.
2. Remove the programming unit.
3. Pivot the HBMU heat management unit down.
4.
Remove cover
A
.
5. Check fuse F1 (see connection and wiring dia-
gram).
Danger
Incorrect or improperly fitted fuses can lead
to an increased risk of fire.
■
Insert fuses without using any force. Posi-
tion fuses correctly.
■
Only use structurally identical types with
the specified response characteristics.
Troubleshooting
Repairs (cont.)
6167586
Diagnosis