Operating instructions

ManualsBrandsViessmann ManualsBoilerType B2HA

117

Dis-

played

fault

code

Const. Weath.-

comp.

System char-

acteristics

Cause Measures

bC X Control mode

without remote

control

Communica-

tion error, re-

mote control

Vitotrol

heating circuit 1

(without mix-

er)

Check connec-

tions, cable, coding

address "A0" in

group "Heating

circuit" and re-

mote control set-

ting (see

page 156).

For wireless re-

mote controls:

Check connec-

tions, place remote

control unit close to

the boiler.

bd X Control mode

without remote

control

Communica-

tion error, re-

mote control

Vitotrol

heating circuit 2

(with mixer)

Check connec-

tions, cable, coding

address "A0" in

group "Heating

circuit" and re-

mote control set-

ting (see

page 156).

For wireless re-

mote controls:

Check connec-

tions, place remote

control unit close to

the boiler.

Troubleshooting

Fault codes

(cont.)

5772 909 GB

Service