Circulating Pumps CP50 Installation And Operating Instructions Manual page 16

English
• It is only permitted to have the rotor removed from the
motor housing by qualified personnel.
• If the unit consisting of impeller, bearing shield and
rotor is pulled out of the motor, persons with medical
aids, such as cardiac pacemakers, insulin pumps, hear-
ing aids, implants or similar are at risk. Death, severe
injury and damage to property may be the result. For
such persons, a professional medical assessment is
always necessary.
In assembled condition, the rotor's magnetic field is guided
in the motor's iron core. There is therefore no harmful mag-
netic field outside the machine.
After successful maintenance and repair work, install and
connect the pump according to the "Installation and electri-
cal connection" chapter. Switch on the pump according to
the "Commissioning" chapter.
Fault
Pump is not run-
ning although the
power supply is
switched on.
Pump is making
noises.
Building does not
get warm.
LED flashing
12
Cause
Electrical fuse
defective.
Pump has no volt-
age.
Cavitation due to
insufficient suction
pressure.
Thermal output of
the heating surfaces
is too low.
Pump malfunction
Remedy
Check fuses.
Restore power after inter-
ruption.
Increase the system suction
pressure within the permis-
sible range.
Check the delivery head
setting and set to lower
head if necessary.
Increase setpoint (see 5.3).
Set control mode to three
speed stages
Contact specialist techni-
cian
4172332-Ed.01 (2012/07)