Pcb Positions - Viessmann VITOLIGNO 300-C Installation And Service Instructions Manual

Connection and Wiring Diagram

PCB Positions

Legend
A PCBs
B Fuse F20
C Fuse F30
132
Vitoligno 300-C Installation/Service
Overview of PCBs A
ZPK Auxiliary PCB: Control of the fuel charging and
cleaning systems
HKK Heating circuit PCB: Control of the heating circuits,
DHW heating and solar
KSK Main PCB: Burner control unit, power export,
KM-BUS, CAN bus, buffer tank temperature sensors,
control of automatic return temperature raising
facility
1. Remove 2 screws and remove the top boiler panel.
2. Remove 4 screws and remove the PCB cover.
Fuses
F10
T10A

250V 50/60 Hz

PCB KSK power cable

F20
T5A

250V 50/60 Hz

PCB ZPK power cable

F30
T5A

250V 50/60 Hz

PCB HKK power cable

Battery
The battery provides power for saving the time and
date in the event of a power failure.
Button cell, type CR2032, 3 V

Replacement: every 5 years

Front of boiler
D Fuse F10
E Battery
F Ecotronic software update port
F