User manual

43
741.011 | 12.18
EN
Solar circuit pump not operating + switch-on condition is not fulfilled
• The following functions are activated
and are actively intervening in the
control process:
– Interval function
– Holiday function
– Anti-freeze 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 but 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
15.2 Error messages
When an error message is displayed, the backlighting turns red and starts flashing if no
button has been pressed for 5 minutes.
The systems shown in the following error messages are only examples.
Error message Description Remedy
T
An interruption was detected at the dis-
played sensor input (in this case: sensor
input 2).
Check the cable and
sensor connected to the
sensor input.
T
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.
The controller has detected a flow rate fault.
A permanently high temperature difference
exists between the heat source and loading
target. The solar circuit pump flashes. Pos-
sible causes:
• Air in system
• The isolating valve is closed.
• The pump is faulty.
• Bleed air from the
system.
• Check the isolating
valve.
• Check the pump.