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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
Summary of Contents for SiFire EN 100/200-205-45 E
Page 2: ...Fig 1 Fig 2a A 2 2 E B C D ...
Page 3: ...Fig 2b Fig 3 21 25 26 13 11 12 19 15 22 27 20 24 23 2 1 14 4 16 7 5 6 10 18 17 9 9 10 8 3 ...
Page 4: ...Fig 4 Fig 5 ...
Page 5: ...Fig 6a 3 5 D D 4 D 2 3 C min max 1 8 m s Fig 6b min 3 5 D D 4 D max 2 m 2 3 C max 1 8 m s ...
Page 6: ...Fig 7 Fig 8 max 3 2 m min A B C D 2 4 5 6 3 8 7 1 ...
Page 7: ...Fig 9a Fig 9b A B C D 800 800 800 ...
Page 8: ...Fig 1a Fig 9a variant Fig 9b variant A B C D 800 800 800 ...
Page 9: ...Fig 10 Fig 11 1 2 1 2 1 ...
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