12
EN
TROUBLESHOOTING
Problem
Possible cause
Solution
Pump running. No
water is pumped.
Air in system (cannot
escape)
Vent the system.
Impeller clogged.
Clean the impeller.
Pump does not start or
switches off.
Motor protection
switch has switched off
the pump.
Ensure adequate
cooling.
No power.
Check electronic con-
nections.
Pump is running.
The
Delivery rate decreases
or breaks down.
Pump is installed too
low.
Raise the pump.
Water pipe system is
leaking.
Check pipe system for
leaks.
Impeller is worn out.
Replace impeller.
Filter is dirty.
Clean filter.
