Installation and operating instructions Wilo-Stratos PICO
19
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, 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
connect the pump according to the “Installation and electrical
connection” chapter. Switch on the pump according to the
“Commissioning” chapter.
10 Faults, causes and remedies
Faults
Causes
Remedies
Pump is not running
although the elec-
trical power supply
is switched on.
Electrical fuse defective.
Check fuses.
Pump has no voltage.
Resolve the power inter-
ruption.
Pump is making
noises.
Cavitation due to
insufficient suction
pressure.
Increase the system suc-
tion pressure within the
permissible range.
Check the delivery-head
setting and set it to a
lower height if necessary.
Building does not
get warm.
Thermal output of
the heating surfaces
is too low.
Increase setpoint
(see 8.3).
Switch off setback oper-
ation (see 8.6).
Set control mode to
Δ
p-c.
