9.2 Faults without error messages
For faults and malfunctions that cannot be displayed, you can use the following ta-
ble to identify them, plus evaluate the possible causes and sources of such errors. If
you cannot rectify the fault by using the description below, you will need to contact
your supplier or installer.
Error display
Possible causes
No display pos-
◼
sible
◼
◼
Pump is not
◼
switched on
◼
"Pump" icon
◼
turns, but pump is
not on
◼
◼
Temperature
◼
display fluctuates
strongly at short
◼
intervals
◼
230 V mains power supply
unavailable
Fuse inside unit defective
Unit defective
Unit is in manual operation
mode
Switch-on condition not
yet achieved.
Disruption to pump con-
nection.
Pump has seized up.
No voltage at output.
Sensor cabling has been
laid near to 230 V cables
Long sensor cables ex-
tended using unshielded
leads
Unit defective
Action to take
Switch on or connect up
control unit
Check fuses for building
power supply
Check fuse*, replace if
necessary with new 2A
(T) fuse.
Check 230 V compo-
nents for short-circuits
Contact your supplier
Exit "Manual Operation".
Wait until switch-on
condition achieved
Check cable to pump
Ensure pump can run
smoothly
Contact your supplier.
Reposition sensor ca-
bling, shield sensor leads
Shield sensor leads
Contact your supplier
Important: any faults
involving the 230 V AC
mains power supply must only be
rectified by a technician!
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