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The room sensor's display shows the actual indoor temperature in normal mode.
z
To display the outdoor temperature press the up and down buttons at the same
z
time.
To set the desired indoor temperature press either the up or down button.
z
If the heat pump has an active alarm the text AL appears in the display.
z
10
Troubleshooting
10.1
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 section "13 References", if you are
unable to rectify the problem yourself.
Message
Meaning
LOW
LOWPRESS ERROR - The com-
PRESSURE
pressor stops and there is no
ERROR
hot water production.
HIGH
HIGHPRESS ERROR - The com-
PRESSURE
pressor stops and there is no
ERROR
hot water production.
MOTOR P
Motor protection cut out. The
ERROR
compressor stops and there is
no hot water production.
OUTDOOR
Fault in outside sensor. To cal-
SENSOR
culate the supply temperature's
desired value, use 0°C instead.
SUPPLY LINE
Supply line sensor error.
SENSOR
Everything stops except the
circulation pump for the hea-
ting system.
Cause
Not enough fluid
in the brine sys-
tem. Air in the
brine system.
Blocked filter in
the brine system.
Insufficiently ope-
ned radiator/floor
loop thermostats.
Air in the heating
system. Blocked
strainer in the hea-
ting system.
Power failure cau-
sed by a blown
fuse or the safety
switch has deploy-
ed.
Electrical fault.
Electrical fault.
VUBMI102
Remedy
Contact your
installer.
Open radiator /
floor loop thermo-
stats. Top up and
bleed the heating
system or contact
your installer.
Check the fuses
and reset the
safety switch.
Contact your
installer.
Contact your
installer.
DHP-AX – 39
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