49
ID
Class
Designation
(Possible) cause/effect
Rectification/action
Quit
75 Info
Maximum number of
attempts exceeded
The maximum number of attempts has been
reached.
-
-
76 Info
Control monitoring
The control circuit monitoring system has
detected an impending instability of the
control circuit.
-
-
77 Info
Open loop control
The actuator of the unit will be controlled
directly due to an error of the sensor or the
control circuit monitoring system.
-
-
78 Info
Overtemperature
The permissible operating temperature has
been exceeded.
-
-
79 Info
Subnormal temperature A subnormal temperature was detected in
the unit.
-
-
90 Info
Not Stable Yet
The unit works, however, it has not reached a
stable (fixed) state.
-
-
100 Warning Exterior temperature
sensor
The exterior temperature sensor is defective.
The exterior temperature will not be taken
into consideration for the calculation of the
inflow temperature of the heating circuits.
The exterior temperature
sensor or its wiring must
be checked.
No
105 Warning Flow temperature
sensor
The inflow temperature sensor of the heating
system is defective. If possible, the
temperature of the heat generating system
or the temperature of the external heat
source will be used as an inflow temperature.
The inflow temperature
sensor or its wiring must
be checked.
No
106 Warning Frost protection active The frost monitoring system has detected an
insufficient inflow temperature of the heating
system below the frost protection limit. A
heat request is triggered.
-
No
107 Warning Frost protection alarm
The frost monitoring system has detected an
insufficient inflow temperature of the heating
system below the frost protection alarm limit.
The system is at risk to be damaged by frost.
Primarily, look at the
other alarms. These are
probably the cause of the
standstill of the system. A
rectification of those
should also cancel the
frost protection alarm.
Yes
