16
9.2 Faults without error messages
For faults and malfunctions that cannot be displayed, you can use the following
table 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
Action to take
No display pos-
sible
230 V mains power supply
■
unavailable
Switch on or connect up
control unit
Check fuses for building
power supply
Fuse inside unit defective
■
Check fuse*, replace if
necessary with new 2A
(T) fuse.
Check 230 V compo-
nents for short-circuits
Unit defective
■
Contact your supplier
Pump is not
switched on
Unit is in manual opera-
■
tion mode
Exit "Manual Operation".
Switch-on condition not
■
yet achieved.
Wait until switch-on
condition achieved
"Pump" icon
turns, but pump
is not on
Disruption to pump con-
■
nection.
Check cable to pump
Pump has seized up.
■
Ensure pump can run
smoothly
No voltage at output.
■
Contact your supplier.
Temperature
display fluctuates
strongly at short
intervals
Sensor cabling has been
■
laid near to 230 V cables
Reposition sensor
cabling, shield sensor
leads
Long sensor cables ex-
■
tended using unshielded
leads
Shield sensor leads
Unit defective
■
Contact your supplier
Important: any faults
involving the 230 V AC
mains power supply must only
be rectified by a technician!
