Wilo HELIX VE 1 Series User Manual

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Installation and operating instructions - WILO-HELIX VE 1~
10. Faults, causes and remedies
WARNING! Risk of electrical shock!
Ensure that any electrical hazard is avoided.
Ensure that the power supply is switched off and
secured against unauthorised switching before
performing any work on the electric system.
WARNING! Risk of scalding!
In case of high water temperatures and high sys-
tem pressures, close the insulating valves upstream
and downstream of the pump.
First, allow pump to cool down.
Faults must be remedied by qualified personnel
only!
Observe the safety instructions in section 9
Maintenance!
Fault Possible causes Remedies
Pump does not operate No current Check fuses, wiring and connections
Thermistor tripping device has tripped
cutting offpower
Eliminate any cause of overloading of the
motor
Pumps is running but output is insuffi-
cient
Incorrect direction of rotation Check the direction of rotation of the
motor and correct it if necessary
Parts of the pump are obstructed by for-
eign bodies
Check and clean the pump
Air in suction pipe Seal the suction pipe so that it is airtight
Suction pipe too narrow Install a larger suction pipe
Valve opening is insufficient Open the valve properly
Pump output is erratic Air inside the pump Vent the pump; check that the sucti-
on pipe is airtight. If required, start the
pump for 20 – 30 s – open the venting
plug to remove air – close the venting
plug and repeat the procedure several
times until no more air escapes from the
pump
Pump vibrates or is noisy Foreign bodies inside the pump Remove the foreign bodies
Pump is not correctly attached to ground Retighten the screws
Bearing damaged Call Wilo customer service
Motor overheats, motor protection trips Open circuit in one of the phases Check fuses, wiring and connections
Ambient temperature too high Provide cooling
Mechanical seal leaks Mechanical seal is damaged Replace the mechanical seal
The flow is irregular In Mode 2, the pressure sensor is not
adequate
Put a sensor with conforming pressure
scale and accuracy
In mode 2, the pump does not stop if the
flow is zero
The non-return valve is not tight Clean it or change it
The non-return valve is not adequate Replace it by an adequate non-return
valve
The tank has low capacity due to the
installation
Change it or add an other one on the
installation
If the fault cannot be resolved, please
contact the Wilo customer service.
English

Wilo HELIX VE 1 Series Specifications

General

Brand	Wilo
Model	HELIX VE 1 Series
Category	Water Pump
Language	English