EN-17
Displays 9.2
English
9.2 Fault Messages
Fault messages on the display fall into three broad categories:
Heat pump fault
System fault and
Sensor fault
You only need to inform your after-sales service if there is a heat
pump fault (HP fault). Make a note of the error message and the
software version displayed in the operating data. After rectifying
the problem, press the Esc button to acknowledge the fault.
The following messages may appear on the display.
NOTE
System fault
In mono energy systems, the minimum return set temperature is set if a
heat pump or system fault occurs. Antifreeze (frost protection) is
ensured. By manually switching to the 2nd heat generator operating
mode, the building is heated exclusively using the immersion heater.
A heat pump fault indicates a defect in the heat pump. Inform your local technician. Details of
the fault (display), the heat pump designation (type plate) and the software version of the heat
pump manager (operating data) are required for rapid and precise troubleshooting. Depending on
the heat pump type, the following system faults may appear on the display:
Low-pressure
Hot gas thermostat
Antifreeze
Compressor load
A plant fault indicates a defect or a false setting in the heat pump system. Inform your local
technician. Details of the fault, the heat pump designation and the software version of the
controller will be required for rapid and precise troubleshooting. Depending on the system type,
the following plant faults may appear on the display:
Motor protection primary
Flow rate well
High pressure
Temp. difference
As with a system fault, this can be caused by a breakage or a sensor short-circuit. Inform your
local technician. Details of the fault, the heat pump designation and the software version of the
controller will be required for rapid and precise troubleshooting. Depending on the system type,
the following sensors may be defective:
Return flow sensor
Sensor limit value
Hot water sensor
Flow sensor
2nd/3rd Sensor for heating circuit
External sensor
Room temperature sensor
Additional return flow temperature sensor
Hot gas sensor
High-pressure sensor
Low-pressure sensor
Indoor air temperature sensor
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