Vaillant aroSTOR VWL B 270/5 Notice D'emploi page 57

Appendix
A Eliminating faults
Fault
The product no longer
works.
There is a hot water
shortage.
8000015877_00 Operating instructions
Cause
The power supply is interrupted.
The target temperature of the water is
reached.
The product is switched off.
The product is in holiday mode.
The air inlet temperature is below -7 °C
or above +45 °C.
Time programming conflicts with the
high-tariff load relief.
A programmed operating time is pre-
venting operation (ECO symbol is lit
up).
The domestic hot water volume, which
was used within a short space of time,
is larger than the volumetric capacity of
the domestic hot water cylinder.
The programmed operating time for
the heat pump is too short (at least 12
hours in a 24 hour period).
The setting for the set target temperat-
ure is too low
Time programming conflicts with the
high-tariff load relief.
Remedy
Ensure that there has
not been a power cut
and that the product is
correctly connected to
the power supply. When
the power supply is re-
established, the product
automatically starts up.
If a fault is still present,
contact your competent
person.
Check the domestic hot
water temperature.
Check whether the
product is switched on
and the green LED is lit
up.
Switch off holiday mode.
Ensure that the domestic
hot water cylinder is
heated using the back-
up energy sources
(immersion heater). If the
air inlet temperature is
once again between -7 °C
or and +45 °C, the heat
pump restarts.
Check the time program-
ming.
Check the set operating
times.
Wait until the domestic
hot water cylinder is sup-
plied with sufficient hot
water again.
Set the operating time
so that the domestic hot
water cylinder is charged
for at least 12 hours in a
24 hour period.
Increase the target tem-
perature.
Check the time program-
ming.
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