Installation and maintenance instructions for uniSTOR 0020111105_00 33
8 Fault finding
The tables below provide information on possible faults
which can occur when the cylinder is being operated
along with information on their causes and how to rec-
tify them.
All work on the Vaillant cylinder (installation, mainte-
nance, repairs etc.) may only be performed by compe-
tent persons.
a
Danger!
Risk of death from electric shock!
Improperly executed work on the cylinder
can result in a risk to life and limb.
> Faults may only be eliminated by a com-
petent person approved at the time by
the Health and Safety Executive.
b
Caution!
Risk of damage due to overheating!
Not all electric immersion heaters have a
thermal cut-out.
> Use only Vaillant Ltd. electric immersion
heaters with a thermal cut-out as repla-
cement parts.
i
When replacing parts, use only original replace-
ment parts from Vaillant Ltd.
We recommend entering into a maintenance agreement.
Fault finding 8
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