Additional Information
Viessmann Manufacturing Company Inc.
750 McMurray Road
Waterloo, Ontario • N2V 2G5 • Canada
Tel. (519) 885-6300 • Fax (519) 885-0887
www.viessmann.ca • mail@viessmann.ca
Viessmann Manufacturing Company (U.S.) Inc.
45 Access Road
Warwick, Rhode Island • 02886 • USA
Tel. (401) 732-0667 • Fax (401) 732-0590
www.viessmann-us.com • mail@viessmann-us.com
8
Troubleshooting Guide
Failure Cause Correction
Heating s ystem does not activate System power switch “ ” on the boi ler
control has not been activated.
Activate
Main power supply to boiler and control
has not been activated.
Activate
Breaker or fuse in building electrical panel
has blown.
Contact heating contractor.
Safety temperature high limit has
deactivated.
Contact heating contractor.
Vent dam per motor does not open (if
applicable).
Contact heating contractor.
Burner does not activate, or does so
Fuel supply inadequate Open main gas supply valve.
sporadically
Boiler control or boiler system control is
improperly set.
Ensure proper setting of switching times
and program selection s witch.
Fault indication on boiler control (if
applicable)
Contact heating contractor.
Burner does not activate Ignition system fault Turn off s ystem power switch and wait
5 minutes. Turn on system power
switch. Do not repeat more than twice.
If unsuccessful, contact heating
contractor.
Heating circuit cold
Priority to (indirect-fir ed) DHW production Wait u nti l DHW tank h as com pl eted i ts
heating cycle.
Room temperature is too cold or too hot
during different periods of the year
Heating curves not properly set Make appropriate adjustments
(see Operating Instructions of Vitotronic
control).
Please notify your heating contractor in the event of additional fault occurrences.
5167 469 v1.1
Technical information subject to change without notice.
Printed on environmentally friendly
(recycled and recyclable) paper.
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