17
WILO SE 10/2013
English
10. Defects - causes - remedies
WARNING! Electrical shock hazard!
Dangers caused by electrical energy must be
excluded.
All electrical work must be performed after the
electrical supply has been switched off and
secured against unauthorized switching.
WARNING! Risk of scalding!
At high water temperatures and system pressure
close isolating valves before and after the pump.
First, allow pump to cool down.
If the fault cannot be solved, please
contact WILO customer services.
11. Spare parts
All spare parts must be ordered through WILO
Customer Services.
In order to avoid any mistakes, please specify the
name plate data for orders.
Spare parts catalogue is available at
www.wilo.com.
Subject to technical alterations!
Defects
Causes
Remedies
Pump fails to operate
No current
Check the fuses, the wiring, and the con-
nectors
The thermistor tripping device has trip-
ped out, cutting off power
Eliminate any cause of overloading of the
motor
Pump runs but delivers too little
Wrong direction of rotation
Check the direction of rotation of the
motor and correct it if necessary
Parts of the pump are obstructed by
foreign bodies
Check and clean the pipe
Air in suction pipe
Make the suction pipe airtight
Suction pipe too narrow
Install a larger suction pipe
The valve is not open far enough
Open the valve properly
Pump delivers unevenly
Air in pump
Evacuate the air in the pump; check that
the suction pipe is airtight. If required,
start the pump 20-30s – open the air
bleed screw in order to move air away –
close the air bleed screw and repeat it
several times until no more air is going
out of the pump
Pump vibrates or is noisy
Foreign bodies in pump
Remove the foreign bodies
Pump not properly attached to ground
Retighten the screws
Bearing damaged
Call WILO Customer Service
Motor overheats. Its protection trips out A phase is open-circuit
Check the fuses, the wiring, and the con-
nectors
Ambient temperature too high
Provide cooling
Mechanical seal is leaking
Mechanical seal is damaged
Replace the mechanical seal
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Страница 105: ...5 2 7 3 100 7 4 Helix FT FF WILO WILO 7 5 5 7 6 850 dU dt 2500 105 WILO SE 10 2013...
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