Setting Limp Home Mode; Activating The Anti-Legionella Function; Frost Protection Function; Troubleshooting - Vaillant aroSTOR VWL BM 200/5 Operating Instructions Manual

5 Troubleshooting

4.11 Setting limp home mode

This mode enables a limp home mode for
cases where use of the heat pump is pre-
vented (air pipes not yet connected, dust-
intensive work in the product's vicinity...).
In this mode, energy savings cannot be
achieved by using the heat pump. It should
therefore be used in exceptional circum-
stances and for a limited time period only.
▶
Press the menu button.
▶
Turn the rotary knob until the ELEC.
MODE menu appears in the display.
▶
Press the rotary knob.
▶
Turn the rotary knob to activate the limp
home mode.
▶
Press the rotary knob.
▶
Press the menu button to return to the
original display.
4.12 Activating the anti-legionella
function
The product has an anti-legionella func-
tion. In doing so, the water in the domestic
hot water cylinder to a temperature
between 60 °C and 70 °C.
Danger!
Risk of death from legionella.
Legionella multiply at temperat-
ures below 60 °C.
▶
Have a competent person
inform you about the meas-
ures that should be taken to
protect against Legionella in
your installation.
▶
Do not set any water temper-
atures below 60 °C without
consulting the competent
person first.
Contact your competent person in order
to have them activate or deactivate the
anti-legionella function or to find out more
14
information about the anti-legionella func-
tion.

4.13 Frost protection function

Note
The product is protected by the
frost protection function. The hot
and cold water circuit is not protec-
ted by the product.
5 Troubleshooting

5.1 Detecting and rectifying faults

This section shows all of the fault mes-
sages that can be rectified without seeking
help from the competent person in order to
start up the product again.
Troubleshooting (→ Page 16)
▶
Ensure that the product generally works
without any problems and that no fault
messages or alarms are displayed.
▶
If the product still does not function after
the fault has been rectified, contact your
competent person.

6 Maintenance and care

6.1 Maintenance

An annual inspection and maintenance
of the product carried out by a compet-
ent person is a prerequisite for ensuring
that the product is permanently ready and
safe for operation, reliable, and has a long
working life.

6.2 Caring for the product

▶
Clean the casing with a damp cloth and
a little solvent-free soap.
▶
Do not use sprays, scouring agents,
detergents, solvents or cleaning agents
that contain chlorine.
Operating instructions aroSTOR 0020290841_00