Appendix
16
Operating instructions aroSTOR 0020290841_00
Appendix
A Troubleshooting
Fault
Cause
Solution
The product no longer
works.
The power supply is interrupted.
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.
The set target temperature of the water
is reached.
Check the domestic hot
water temperature.
The product is switched off.
Check whether the
product is switched on
and the green LED is lit
up.
The product is in holiday mode.
Switch off holiday mode.
The air inlet temperature is below -7 °C
or above +35 °C.
Ensure that the domestic
hot water cylinder is
heated using the back-
up energy sources (im-
mersion heater). If the
air inlet temperature is
once again between -7 °C
or and +35 °C, the heat
pump restarts.
Time programming conflicts with the
high-tariff load relief.
Check the time program-
ming.
A programmed operating time is pre-
venting operation (ECO symbol is lit
up).
Check the set operating
times.
There is a hot water
shortage.
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.
Wait until the domestic
hot water cylinder is sup-
plied with sufficient hot
water again.
The programmed operating time for
the heat pump is too short (at least 12
hours in a 24 hour period).
Set the operating time
so that the domestic hot
water cylinder is charged
for at least 12 hours in a
24 hour period.
The setting for the set target temperat-
ure is too low
Increase the set target
temperature.
Time programming conflicts with the
high-tariff load relief.
Check the time program-
ming.
