en
23
Problems and solutions
Problem description
Possible causes and solutions
The heating is permanent-
ly active
• Check if the remote control is set to rapid warm-up
• The outdoor temperature sensor is not correctly
positioned or defective (see Sensor fault)
• The temperature value for the summer operation
is too high
The heating is permanent-
ly off
• Check if the remote control is set to heating
circuit off
• The pump setting in the HKM3 is set to 0 (off)
• The fl ow sensor is defective (see Sensor fault)
• The temperature value for the summer operation
is too low
The heating heats up very
slowly
• Check and, if necessary, increase the runtime of
the mixing valve
Despite the heating breaks
of the radiators,
it is permanently too
warm
• Check the heating curve adjustment and,
if necessary, decrease it
• The maximum fl ow temperature value is too high.
If necessary, decrease it
• Check the setting of the remote control and,
if necessary, choose a lower setting
• The adjusted day correction value is too high.
If necessary, decrease it
Even though the heating
is active, it ispermanently
too cold
• Check the heating curve adjustment and,
if necessary, increase it
• The maximum fl ow temperature value is too low.
If necessary, increase it
• Check the setting of the remote control
• Check the adjusted time
• Check the adjusted time frames for the night
correction and, if necessary, change the setting
such that unwanted temperature decreases cannot
occur
6
Accessories
Sensors
The product range includes high-precision platinum temperature sensors, fl atscrew
sensors, outdoor temperature sensors, indoor temperature sensors, cylindrical clip-
on sensors, also as complete sensors with immersion sleeve.
Overvoltage protection device
In order to avoid overvoltage damage at collector sensors (e.g. caused by local light-
ning storms), we recommend installting the overvoltage protection RESOL SP10.
RTA12 remote control
With the RTA12 remote control, the heating curve can be comfortably adjusted
from the living area. Increasing the heating curve setting causes an increase in fl ow
temperature, decreasing the setting causes a decrease. The integrated sensor meas-
ures the ambient temperature.