Fault Summary And Checklist - Biral AX RED Serie Instructions D'installation Et D'entretien

9. Fault summary and checklist

Warning
Before starting to rectify faults, it is vital that the
pump is taken out of operation, and it must be re-
moved from the mains at all poles and safe guarded
from being switched on again. This should only be
carried out by specialist staff.
Accessible voltage!
Risk of scalding from escaping medium.
Risk of burning from hot surfaces.
The list below should be followed step by step from top to bottom.
Fault
Pump does not run
(no LED indication)
Short-circuit
when switching on pump
Power consumption
indicates fault «– –»
Noises from pump
Radiators do not heat up
Cause
No motor voltage
Mains supply wrongly connected Connect correctly
Motor defective
Fault in electronics
Mains voltage too low
Motor blocked
Air in pump
Cavitation
Pump too powerful
Pump too weak
Air in pump
Subject to technical modifications.
Remedy
Check switch and fuses, check supply voltage
Change pump
Restart pump (switch mains supply ON/
OFF)
Check control and mains
Switch pump ON/OFF several times.
Disassemble motor for de-blocking:
– Close slide valve before and after pump
– Dismantle motor; release
4 socket-head screws.
Warning:
hot water can run out.
– Remove motor
– Turn impeller until shaft turns easily.
– Fit motor and open slide valve.
Vent system several times with pump swit-
ched off. Pump vented automatically
Increase system pressure/reduce temperature
Set lower characteristic
Set higher characteristic
fit more powerful pump
Switch off automatic night reduction
Aut.
Vent system with pump off
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