Wilo SiFire, Installation And Operating Instructions Manual

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English
Installation and operating instructions Wilo-SiFire System 45
Unusual overheating of motor exterior Pump overload Dismantle and check.
Coupling out of axis Align correctly.
Ambient temperature higher than 40°C Ventilate the space.
Voltage higher/lower than nominal value Check upstream power supply.
Phase failure
Check power supply and fuses.
Insufficient ventilation Check strainers and pipes. Resize
Sliding between stator and rotor Repair or change the motor.
Unbalanced voltage on three phases Check power supply.
Main pump starts before jockey pump Pressure switch on main pump calibrated
at a higher value than the jockey pump Check pressure switch settings.
Main pump starts immediately, with
inhibition indicator in position 1 Pressure switch calibrated at a lower
value than the system pressure Check pressure switch settings.
Increase the pressure level in the instal-
lation.
Water level in priming tank too low Check level of priming tank.
Sudden speed drop Instantaneous overload/foreign part in
pump Dismantle pump.
Single-phase operation Check supply and fuses.
Voltage drop Check supply.
Magnetic noise
Sudden whistling Motor winding or short-circuit Dismantle the motor, then repair or
change it.
Friction between stator and rotor Dismantle the motor, then repair or
change it.
Mechanical noise Loosened bolts Check and tighten.
Loosened screws in fan cover cap/cou-
pling cover cap Check and tighten.
Sliding between fan and motor, and
between coupling and coupling cover
cap etc. Guarantee the correct distance and re-
assemble.
Foreign parts in motor or pump Dismantle and remove.
Not aligned coupling Re-align.
Bearings few oiled/worn/broken Lubricate or replace.
Pump/motor bearings overheating Bearings damaged Replace.
Insufficient lubrication Lubricate again.
Pump and motor not aligned Re-align
Unusual vibrations No vibration-damping sleeve devices on
the unit Install or repair.
Pump in cavitation Review the sizing of installation.
Too much air in water 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.
Bearings, pump/motor shaft worn Replace.
Pump/motor couplings are worn Replace.
Pump and motor not aligned Re-align.
Motor does not stop after using of stop
button This is normal if plant pressure is not
restored Stop the automatic mode, then stop the
pump.
Control panel failure Turn off the control panel, then check.
Electromagnet for stopping diesel pump
control panel failure Manually use the fuel lever on which the
electromagnet works.
Engine fails to reach nominal speed or
oscillate Accelerator lever in wrong position Check and adjust rpm and secure lever.
Dirty fuel strainer Clean or replace.
Faulty injector/pump Call customer service centre.
The starter pinion does not remove after
starting the engine Speed counter failure Check the distance from wheel. Replace.
Failure of control panel on control box Call customer service centre.
Faults Causes Remedy