Viessmann Vitodens 200-W B2HE Installation And Service Instructions Manual page 96

Troubleshooting
Fault messages
(cont.)
Fault number System characteristics
on the display
F.581 Control mode without room
influence
F.582 Control mode without room
influence
F.666 Preheating of second DHW
cylinder and solar transfer
pump not working
F.667 Preheating of second DHW
cylinder and solar transfer
pump not working
F.668 Preheating of second DHW
cylinder and solar transfer
pump not working
F.669 Preheating of second DHW
cylinder and solar transfer
pump not working
F.670 No solar central heating
backup
F.671 No solar central heating
backup
F.672 Thermostat function for solar
control and solar transfer
pump not working
F.673 Thermostat function for solar
control and solar transfer
pump not working
F.682 Burner in a fault state
F.683 Burner in a fault state
F.684 Burner in a fault state
96
Cause
Lead break, room temper-
ature sensor, heating cir-
cuit 3
Short circuit, room tem-
perature sensor, heating
circuit 3
Lead break, temperature
sensor, DHW preheating
TS3
Short circuit, temperature
sensor, DHW preheating
TS3
Lead break, temperature
sensor, DHW reheating
TS4
Short circuit, temperature
sensor, DHW reheating
TS4
Lead break, buffer tem-
perature sensor TS3
Short circuit, buffer tem-
perature sensor TS3
Lead break, temperature
sensor, thermostat func-
tion TS3
Short circuit, temperature
sensor, thermostat func-
tion TS3
Air mass flow rate sensor
not installed
Air mass flow rate sensor
faulty
Back draught safety de-
vice faulty
Measures
Check external room temperature
sensor for heating circuit or room
temperature sensor for remote
control unit.
Check external room temperature
sensor for heating circuit or room
temperature sensor for remote
control unit.
Check temperature sensor TS3.
Check temperature sensor TS3.
Check temperature sensor TS4.
Check temperature sensor TS4.
Check temperature sensor TS3.
Check temperature sensor TS3.
Check temperature sensor TS3.
Check temperature sensor TS3.
Install the correct fan.
Reset device.
Replace fan.
Reset device.
Check the back draught safety de-
vice and replace if necessary.
Reset device.