DHP-AX – 20
VUBMI102
Display
4.1
The display of the control computer shows information about the heat pump’s
operation, status and any alarms, in text form. The status, indicated by symbols, is
also shown in the lower section which shows the heat pump’s active process.
Operating modes
4.1.1
Appear with applicable heat pump operating status text.
Operating
mode
Meaning
(OFF)
The installation is fully switched off.
D
Remember that if the operating mode OFF is to be used
for long periods during the winter, the water in the heating
system in the installation must be drained, otherwise there
is a risk of frost damage.
AUTO
Automatic operation with both heat pump and auxiliary heater per-
mitted. If no auxiliary heating is permitted only AUTO or OFF can be
selected as operating mode.
HEAT PUMP
The control computer is controlled so that only the heat pump unit
(compressor) is allowed to operate. NOTE! No peak heating charging
(anti-legionella function) with only heat pump operation.
AUX. HEATER
The control computer only permits the auxiliary heater to be in ope-
ration.
HOT WATER
The control computer permits operation with heat pump for hot
water production and auxiliary heater during peak heat charging
(anti-legionella function). No heating goes to heating system.
Symbols
4.1.2
Displays the operating status of the heat pump using symbols.
Symbol
Meaning
HP
Indicates that the compressor is in operation. An “F” next to the
symbol indicates that a flow switch is installed.
LIGHTNING Indicates that the auxiliary heater is in operation.
HOUSE
Indicates that the 3-way valve position is for heat production for the
house.
