Wilo SiFire EN Série Notice De Montage Et De Mise En Service page 55

Faults
Unusual overheating of motor exterior
Main pump starts before jockey pump
Main pump starts immediately, with
inhibition indicator in position 1
Sudden speed drop
Magnetic noise
Sudden whistling
Mechanical noise
Pump/motor bearings overheating
Unusual vibrations
Motor does not stop after using of stop
button
Engine fails to reach nominal speed or
oscillate
The starter pinion does not remove after
starting the engine
Installation and operating instructions Wilo-SiFire System
Causes
Pump overload
Coupling out of axis
Ambient temperature higher than 40°C
Voltage higher/lower than nominal value Check upstream power supply.
Phase failure
Insufficient ventilation
Sliding between stator and rotor
Unbalanced voltage on three phases
Pressure switch on main pump calibrated
at a higher value than the jockey pump
Pressure switch calibrated at a lower
value than the system pressure
Water level in priming tank too low
Instantaneous overload/foreign part in
pump
Single-phase operation
Voltage drop
Motor winding or short-circuit
Friction between stator and rotor
Loosened bolts
Loosened screws in fan cover cap/cou-
pling cover cap
Sliding between fan and motor, and
between coupling and coupling cover
cap etc.
Foreign parts in motor or pump
Not aligned coupling
Bearings few oiled/worn/broken
Bearings damaged
Insufficient lubrication
Pump and motor not aligned
No vibration-damping sleeve devices on
the unit
Pump in cavitation
Too much air in water
Bearings, pump/motor shaft worn
Pump/motor couplings are worn
Pump and motor not aligned
This is normal if plant pressure is not
restored
Control panel failure
Electromagnet for stopping diesel pump
control panel failure
Accelerator lever in wrong position
Dirty fuel strainer
Faulty injector/pump
Speed counter failure
Failure of control panel on control box
Remedy
Dismantle and check.
Align correctly.
Ventilate the space.
Check power supply and fuses.
Check strainers and pipes. Resize
Repair or change the motor.
Check power supply.
Check pressure switch settings.
Check pressure switch settings.
Increase the pressure level in the instal-
lation.
Check level of priming tank.
Dismantle pump.
Check supply and fuses.
Check supply.
Dismantle the motor, then repair or
change it.
Dismantle the motor, then repair or
change it.
Check and tighten.
Check and tighten.
Guarantee the correct distance and re-
assemble.
Dismantle and remove.
Re-align.
Lubricate or replace.
Replace.
Lubricate again.
Re-align
Install or repair.
Review the sizing of installation.
Make sure that there are no leaks in the
suction line. Check the distance
between the suction points if several
pumps have been installed. Fit anti-vor-
tex plates.
Replace.
Replace.
Re-align.
Stop the automatic mode, then stop the
pump.
Turn off the control panel, then check.
Manually use the fuel lever on which the
electromagnet works.
Check and adjust rpm and secure lever.
Clean or replace.
Call customer service centre.
Check the distance from wheel. Replace.
Call customer service centre.
English
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