Fault; Fault Messages - Viessmann Vitosol 222-T Installation And Service Instructions For Contractors

Fault messages

In the event of fault messages, the elec-
tric heating is switched off. The operating
buttons on the control unit are locked.
The display shows the fault code. E5 is
shown in the other areas. If the voltage
drops below 150 V~, an alarm is trig-
gered. Operation is resumed from a volt-
age of 175 V.
E1 Short circuit or lead break in the tem-
perature sensor for the electric heat-
ing
E3 Cylinder temperature has risen to
more than 90 °C
E5 No low voltage protection, voltage
< 150 V
Note
Operation is resumed when the volt-
age is > 175 V.

Fault

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