Viessmann Vitotronic 200 Installation And Service Instructions For Contractors page 94

Troubleshooting
Fault messages
(cont.)
3B LAN system error
Control mode
■
Operation via app not possible
■
Cause
Memory problems
■
Server problems
■
3C DHCP server not replying
Control mode
■
Operation via app not possible
■
Cause
The DHCP server issues no response.
3D Ethernet cable not connected
■ Control mode
■ Operation via app not possible
Cause
Network cable is not connected.
3F Recovery update error
Control mode
Cause
The update has failed.
40 Short circuit, flow temperature sensor, heating circuit 2
Mixer is being closed.
Cause
Short circuit, flow temperature sensor, heating circuit 2
44 Short circuit, flow temperature sensor, heating circuit 3
Mixer is being closed.
Cause
Short circuit, heating circuit flow temperature sensor,
heating circuit 3
48 Lead break, flow temperature sensor, heating circuit 2
Mixer is being closed.
94
Measure
Switch the control unit OFF and ON again.
Measure
Check network configuration.
Measure
Insert plug of LAN cable.
Measure
Check network configuration.
Wait until the update has been performed again.
Measure
Check flow temperature sensor: See chapter "Check
temperature sensors"
Measure
Check flow temperature sensor: See chapter "Check
temperature sensors"