Faults, Causes And Remedies - Wilo Stratos PICO Série Notice De Montage Et De Mise En Service

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