8 Troubleshooting
8.1 Alarm
In the event of an error message try restarting the installation using the installation’s safety
switch.
If restarting the heat pump does not help try rectifying the problem using the table below.
Contact your installer (see ”References”) if you are unable to rectify the problem yourself.
Message Meaning Cause Remedy
LOWPRESS
ERROR
LOWPRESS ERROR - The com-
pressor stops and there is no
hot water production.
Not enough fluid
in the brine sys-
tem. Air in the
brine system.
Blocked filter in
the brine system.
Contact your
installer.
HIGHPRESS
ERROR
HIGHPRESS ERROR - The com-
pressor stops and there is no
hot water production.
Insufficiently
opened radiator/
floor loop thermo-
stats.
Air in the heating
system. Blocked
strainer in the
heating system.
Open radiator /
floor loop thermo-
stats. Top up and
bleed the heating
system or contact
your installer.
MOTOR P
ERROR
Motor protection cut out. The
compressor stops and there is
no hot water production.
Power failure
caused by a
blown fuse or the
safety switch has
deployed.
Check the fuses
and reset the
safety switch.
ALARM
AUXILIARY
HEATER
Overheating protection
deployed.
Electrical fault. The
safety switch has
tripped.
Contact your
installer.
SENSOR
OUTDOOR
Fault in outside sensor. To cal-
culate the supply temperature’s
desired value, use 0°C instead.
Electrical fault. Contact your
installer.
SENSOR
FRONT
Incorrect supply sensor.
Everything stops except the
circulation pump for the heat-
ing system.
Electrical fault. Contact your
installer.
SENSOR
RETURN
Return sensor fault. Electrical fault. Contact your
installer.
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