10
9.2 Faults without error messages
Faults and malfunctions that cannot be displayed as well as possible causes and
their error source can be identified using the following table. If you cannot remedy
the fault using the description below, contact the supplier or installer.
Problem
Possible causes
Measures
Display does not
function
230V mains voltage not
◼
available
Switch on or connect
controller
Check the connection's
main fuse
Defective fuse inside the
◼
device
Check the fuse*,
replace with a new type
2A/T, if necessary.
Check the 230V compo-
Check the 230V compo-
Check the 230V compo-
nents for short-circuits
Defect device
◼
Contact the supplier
Output is not
switched on
Switch-on condition is not
◼
fulfilled.
Wait until switch-on
condition is satisfied.
"Pump" symbol
rotates, but the
pump is not on
Connection to the pump
◼
interrupted.
Check the cable leading
to the pump
Pump is blocked.
◼
Free the pump
No voltage present at the
◼
switching output.
Contact the supplier.
Temperature
display strongly
fluctuates at short
intervals
Sensor cables are installed
◼
near the 230V cables
Relocate sensor cables,
shield sensor cables
Long sensor cables ex-
◼
tended without shielding
Shield sensor cables
Defect device
◼
Contact the supplier
Faults that affect the
230V/A mains power
supply must only be remedied by
a specialist!
