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• 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, hearing aids, implants or
similar are at risk. Death, severe injury and damage to prop-
erty may be the result. For such persons, a professional med-
ical 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 magnetic
field outside the machine.
After successful maintenance and repair work, install and con-
nect the pump according to the "Installation and electrical con-
nection" chapter. Switch on the pump according to the
"Commissioning" chapter.
10 Faults, causes and remedies
Faults
Pump is not run-
ning although the
electrical power
supply is switched
on.
Pump is making
noises.
Building does not
get warm.
Installation and operating instructions INOVA NH
Causes
Electrical fuse
defective.
Pump has no volt-
age.
Cavitation due to
insufficient suction
pressure.
Thermal output of
the heating surfaces
is too low.
Remedies
Check fuses.
Resolve the power interrup-
tion.
Increase the system suction
pressure within the permissi-
ble range.
Check the delivery-head set-
ting and set it to a lower
height if necessary.
Increase setpoint (see 8.3).
Set control mode to Δp-c.
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