50
742.114 | 14.50
EN
Display Possible cause Remedy
Solar circuit pump is operating + switch-on condition not fulfilled
• The following functions are activated
and are actively intervening in the
control process:
– Interval function
– Holiday function
– Freeze recirculation function
• Blockage protection for the pumps is
being performed.
• No fault.
• Deactivate the relevant func-
tion, if necessary.
flashes
Pump has been switched on in manual
mode (on).
• No fault.
• Switch to automatic mode if
necessary.
Solar circuit pump is operating + switch-on condition is fulfilled + no heat transport in the
solar circuit (no heat transfer fluid circulation)
Air is in the solar circuit. Check the solar circuit for air.
The isolating valve is closed. Check the isolating valve.
Limescale or contamination in solar circuit. Clean the solar circuit (flush).
Solar circuit pump shows cycle behaviour
Temperature difference too small. Adjust temperature difference in
the Parameters settings menu.
Collector sensor incorrectly positioned. Check the position of the collector
sensor and correct if necessary.
Tab. 5: General faults
14.2 Error messages
When an error message is displayed and no button has been pressed for 5 minutes, the
backlighting turns red and starts flashing.
The figures in this section show example systems.
Error message Description Remedy
An interruption was detected at the
displayed sensor input (in this case:
sensor input 2).
Check the cable and
sensor connected to
the sensor input.
A short-circuit was detected at the
displayed sensor input (in this case:
sensor input 2).
Check the cable and
sensor connected to
the sensor input.
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