English
50
PLE Systems & Solutions, Engineering Center Systems Oschersleben
2530098 Ed.3 EBA-VBH- vorläufig De/En- 01.11.2018
10
Faults, causes and remedies
Fault
Cause
Remedy
Low water level triggering
at the pressure boosting
system, even though tank is
filled
Float switch connected incorrectly Check the float switch connection (see
Fig. 7 and wiring diagram of the
pressure boosting system control unit)
Floater on the float switch
blocked/jammed
Check float switch
Float switch defective
Replace float switch
Low water level triggering
at the pressure boosting
system, even though
replenishment is taking
place
Replenishment amount through the
inlet valve too low
Increase inlet amount
Flow pressure at the inlet valve too
low
Flow pressure at the inlet valve too low
Inlet valve defective
Replace inlet valve
Air in the pressure
boosting system pumps
Draw-off connection or connection
to pressure boosting system not
tight
Seal connections
Cavitation noise in the
pumps
Cross-section of the connection
line between tank and pressure
boosting system too small
Adjust the connection line (enlarge
diameter)
No water in the pressure
boosting system, even
though tank is filled
Check valve between break tank
and pressure boosting system
closed
Open the check valve
Draw-off connection or connection
with the pressure boosting system
obstructed
Remedy the obstruction
No water is replenished to
replace the volume
extracted by the pressure
boosting system
Check valve closed upstream from
the inlet valve
Open the check valve
Inlet valve obstructed
Remedy the obstruction
Inlet valve defective
Replace inlet valve
Water escapes from the
overflow
Inlet valve incorrectly adjusted
Check and correct the inlet valve setting
Inlet valve defective
Replace inlet valve
Water escapes from the
ventilation connection
Overflow connection obstructed
and inlet valve defective
Remedy obstruction, replace inlet valve
If the operating fault cannot be remedied, please consult specialist technicians or the nearest
Wilo after-sales service point or representative.
11
Spare parts
Spare parts or repairs may be ordered from local specialist technicians and/or the Wilo after-sales
service.
To avoid queries and incorrect orders, all data on the name plate should be submitted with each order.
Subject to change without prior notice!
