43
742.110 | 14.50
EN
Solar circuit pump not ope switch-on condition is 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 ope 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
14.2
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.
Summary of Contents for TR-A501T-U
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