Viessmann Vitotronic 200 Installation And Service Instructions For Contractors page 106

Troubleshooting
Fault messages
(cont.)
DC Short circuit, room temperature sensor Vitotrol, HC 3
Control mode without room influence
Cause
Short circuit, room temperature sensor, heating circuit 3 Check room temperature sensor: See chapter "Check
DD Lead break, room temperature sensor Vitotrol, HC 1
Control mode without room influence
Cause
Lead break, room temperature sensor, heating circuit 1
without mixer
DE Lead break, room temperature sensor Vitotrol, HC 2
Control mode without room influence
Cause
Lead break, room temperature sensor, heating circuit 2
DF Lead break, room temperature sensor Vitotrol, HC 3
Control mode without room influence
Cause
Lead break, room temperature sensor, heating circuit 3
E0 LON subscriber fault ...
Control mode
■
No communication via LON
■
Cause
LON subscriber fault
Faults without a fault display
Display off
■
■ System cold
Cause
Fuse F2 has tripped.
106
Measure
temperature sensors"
Measure
Check room temperature sensor: See chapter "Check
temperature sensors"
Measure
Check room temperature sensor: See chapter "Check
temperature sensors"
Measure
Check room temperature sensor: See chapter "Check
temperature sensors"
Measure
Check LON communication module and replace if re-
■
quired.
Check the LON subscribers.
■
Check the LON parameters.
■
Update the LON subscriber list.
■
Measure
Check the power consumption.
■
Check the pump and pump connections.
■
Replace fuse F2: See connection and wiring diagram
■