Grundfos SMD Series Installation And Operating Instructions Manual page 28

Fault Cause
5. The current and a) Wrong voltage supply or supply failure.
power consumption is
b) The power cable is faulty.
high.
c) The control system is faulty.
d) The propeller is not free to rotate.
e) The stator windings are faulty.
f)
g) The internal parts are worn.
h) The motor or gearbox roller bearings are faulty.
28
The mixer or flowmaker runs on two phases.
Remedy
Call an electrician.
Call an electrician.
Call an electrician.
Clean the propeller blades, and check manually that
the propeller can rotate freely.
Contact Grundfos.
• Check the electrical connections.
• Replace faulty fuses.
• Call an electrician.
Contact Grundfos.
Contact Grundfos.