Repairs; Shutting Down The Boiler - Viessmann VITODENS 222-F Installation And Service Instructions Manual

Fault messages
(cont.)
Fault number System characteristics
on the display
F.582 Control mode without room
influence
F.682 Burner in a fault state
F.683 Burner in a fault state
F.684 Burner in a fault state
Note
If subscriber faults occur, "Fault, subscriber ..." is dis-
played.

Repairs

!
Please note
Residual water will escape when the boiler or
one of the following components is fitted or
removed:
■ Water-filled pipework
■ Heat exchanger
Circulation pumps
■
Plate heat exchanger
■
■ Components fitted in the heating water or
DHW circuit.
Water ingress can result in damage to other
components.
Protect the following components against
ingress of water:
■ Control unit components (especially in the
service position)
■ Electrical components
■ Plug-in connections
Cables and leads
■

Shutting down the boiler

1. Switch OFF the power supply.
2. Shut off the gas supply.
Cause
Short circuit, room tem-
perature sensor, heating
circuit 3
Air mass flow rate sensor
not installed
Air mass flow rate sensor
faulty
Back draught safety de-
vice faulty
3. If the boiler needs to be removed:
■ Disconnect the balanced flue system.
■ Drain the boiler on the heating water and DHW
sides.
■ Disconnect the on-site cables/leads.
Troubleshooting
Measures
Check external room temperature
sensor for heating circuit or room
temperature sensor for remote
control unit.
Install the correct fan.
Reset the appliance.
Replace fan.
Reset the appliance.
Check the back draught safety de-
vice and replace if necessary.
Reset the appliance.
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