En
gl
is
h (
G
B)
18
5.
High current and
power
consumption.
a)
Wrong voltage supply or supply
failure.
Call an electrician.
b)
Power supply cable is faulty.
Call an electrician.
c)
Control system is faulty.
Call an electrician.
d)
Impeller cannot rotate freely.
Clean the impeller and check manually
that it can rotate freely.
e)
Stator windings are faulty.
Contact Grundfos.
f)
Pump runs on two phases.
1. Check the electrical connections.
2. Replace faulty fuses.
3. Call an electrician.
g)
Internal parts are worn.
Contact Grundfos.
h)
Faulty motor or gearbox roller
bearings.
Contact Grundfos.
Fault
Cause
Remedy
