13
9.2 Failures without error messages
If the system doesn’t work but there is no error message on the display of the con-
troller follow the schedule in the table below.
Error presenta-
tion
Possible reasons
Measures
No display func-
tion
230V mains not connected
◼
or broken
Switch on or connect the
controller
Check the fuse of the
power supply circuit
Internal fuse blown
◼
Check the fuse,
replace it if necessary,
use type 2A/T
Check the 230V~
components for short-
circuits
Controller is defective
◼
Contact the supplier
Controller does
not operate the
system
Controller is in manual
◼
operation
Exit menu "Hand".
Switch-on condition is not
◼
present.
Wait until switch-on
condition is reached.
"Pump" symbol
rotates, but pump
does not work
Pump connection faulty
◼
Check the cable to pump
Pump is seized or blocked.
◼
Bleed the pump
No voltage on the output.
◼
Contact the supplier.
Temperature
display shows
large variances
in a short time
interval
Sensor cables are installed
◼
too close to the 230V~
cable
Separate sensor cables
from the power supply or
shield sensor cables
Sensor cable extentions
◼
used without shielding
Shield sensor cables
Controller is defective
◼
Contact the supplier
Having checked the issues listed but the system is still not working please contact
the supplier or manufacturer for specialist advice.
Failures that affect the
230V~ power supply must
only be must be remedied only by
a competent and trained electri-
cian.
