Internal Extensions Ea1 - Viessmann VITODENS 200-W Service Instructions Manual

Vitodens 200-W B2HA 19, 28, 35 Service

Internal Extensions EA1

Legend
A1 PCB
F1 Fuse
DE1 Digital input 1
DE2 Digital input 2
DE3 Digital input 3
0 – 10 V 0 - 10 V input
fÖ Power supply
fÖ A Power supply for additional
accessories
aBJ Central fault message/
feed pump/DHW recirculation
pump (potential-free)
KM BUS
aVG
Refer to main wiring diagram on page 88.
Troubleshooting
83