Repairs - Viessmann Vitopend 100-W Installation And Service Instructions Manual

Fault messages on the display
Displayed System characteris-
fault code tics
b0 Burner blocked
b8 Burner blocked

Repairs

Checking and cleaning the plate heat exchanger
Shut off and drain the boiler on the heating water and DHW sides.
Note
Residual water may drain from the plate heat exchanger.
(cont.)
Cause
Short circuit, flue
gas monitoring
sensor
Lead break, flue
gas monitoring
sensor
Troubleshooting
Measures
Check the sensor (see
page 38).
Check the sensor (see
page 38).
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