E-14
English
9
9 Displays
The current operating status of the heat pump system can be
read from the LC display.
9.1 Normal Operating Statuses
The display shows both normal operating statuses and those that
are required by utility companies or due to safety functions of the
heat pump. Only information about the relevant system
configuration and HP type are shown on the display.
Heat pump does not operate because there is no request for heating pending.
Heat pump operates in heating operation
Heat pump operates with active cooling
Heat pump operates for DHW preparation and heats the hot water cylinder
Heat pump operates and heats the swimming pool water
Heat pump and 2nd heat generator operate in heating operation
Heat pump and 2nd heat generator operate and heat the swimming pool water
Heat pump and 2nd heat generator operate in DHW heating operation and heat the hot water
cylinder
After expiry of the minimum pause time, the heat pump will start in order to meet the heating
request that is pending. The minimum pause time protects the heat pump and can last up to 5
minutes.
After expiry of the switch cycle block, the heat pump will start in order to meet the heating request
that is pending. The switch cycle block is required by utility companies and can last up to 20
minutes. A maximum of 3 switch-ons per hour are permissible.
After expiry of the switch-on delay for the line load, the heat pump will start in order to meet the
heating request that is pending. The switch-on delay for the line load is required by utility
companies after the voltage is recovered or after a utility block. It can last up to 200 seconds.
The heat pump starts after expiry of the utility company shut-off time. The utility company shut-off
time is specified by the utility company and lasts up to two hours depending on the utility company.
Activation or deactivation is carried out by the utility company.
The heat pump was switched off by an external utility blocking signal on input ID4.
The heat pump starts after completion of the primary pump forerun. This can last up to 3 minutes
(safety function).
The heat pump was switched off because the low pressure limit was reached. The heat pump will
switch on again automatically. The 2nd heat generator (HG2) undertakes the supply of heat until
the heat pump switches on again automatically.
The heat pump was switched off because the low pressure limit was reached. The heat pump will
switch on again automatically. The 2nd heat generator (HG2) undertakes the supply of heat until
the heat pump switches on again automatically.
The heat pump was switched off because the lower operating limit was reached. The heat pump
will switch on again automatically as soon as the heat source temperature has reached a sufficient
level (safety function).
The heat pump was switched off because the high pressure limit was reached. It will switch on
again automatically (high pressure safety program).
The heat pump is blocked. The cause for the block is displayed using the following abbreviations:
ET:
The external temperature is lower than -25 °C (or -15 °C) or higher than 35 °C.
OM:
When the "Bivalent-alternative" operating mode is selected, the external temperature is
lower than the limit temperature HG2. The 2nd heat generator is released.
BR:
When the "Bivalent-regenerative" operating mode is selected, the temperature in the
cylinder is high enough so that all pending requests (heating, hot water or swimming pool) can
be processed by the cylinder.
BF:
The current return flow temperature is lower than the set limit.
DHW:
Domestic hot water reheating via the 2nd heat generator is active.
SK:
A system control was activated in the special functions menu. It will be automatically
deactivated after 24 hours.
EVS
Utility block (EVU) or bridge A1 (ID3-X2) has not been inserted.
Def:
With measure defrost active the usual lowering of the flow temperature during defrosting
did not occur (Special functions measure defrost).
