7
Regular checks
7.1
Alarms
If the display shows a green screen saver, the system is OK and no actions are required.
There are different types of alarms:
▪
Class A: Stops the heat pump. The alarm must be acknowledged.
The display shows a red screen saver.
▪
Class B: Does not stop the heat pump. The alarm must be acknowledged.
The display shows a yellow screen saver.
▪
Class C: Temporary functional deviation, no action required. Does not stop the heat pump.
The alarm is self-acknowledging.
The display shows a green screen saver during the functional deviation.
▪
Class D: Alarm visible only in Genesis primary/secondary systems. Information from Genesis secondary
heat pump(s) to primary heat pump.
The display shows a yellow screen saver. Must be acknowledged.
▪
Class E: Alarm visible only in legacy primary/secondary systems. Information from legacy secondary heat
pump(s) to primary heat pump.
The display shows a yellow screen saver. Must be acknowledged.
If an A-alarm is active, the heat pump compressor is disabled, and the hot water production will stop. This is to
draw attention to the fact that there is an alarm that must be resolved before the heat pump can regain normal
functionality.
If the alarm can not be acknowledged, and auxiliary heater is installed and activated, it will automatically pro-
vide space heating if allowed.
Press the screen, and the following window will appear:
Fig. 1: Start screen with a class A alarm
User Guide
DHP-M
Danfoss Heating Solutions
VUMIB102
19
