The Pump Does Not Stop When A Level Sensor Is Used; The Pump Starts-Stops-Starts In Rapid Sequence - Xylem Flygt 2830.180 Installation, Operation And Maintenance Manual

Cause
The installation is not receiving
voltage.
The impeller is stuck.
If the problem persists, contact the local sales and service representative. Always state the
serial number of your product, see

The pump does not stop when a level sensor is used

WARNING:
Always disconnect and lock out power before servicing to prevent unexpected startup.
Failure to do so could result in death or serious injury.
Cause
The pump is unable to empty the
sump to the stop level.
There is a malfunction in the level-
sensing equipment.
The stop level is set too low.
If the problem persists, contact the local sales and service representative. Always state the
serial number of your product, see

The pump starts-stops-starts in rapid sequence

Cause
The pump starts due to back-flow
which fills the sump to the start level
again.
Flygt 2830.180 Installation, Operation, and Maintenance Manual
Remedy
Check that:
• The main power switch is on.
• There is control voltage to the start equipment.
• The fuses are intact.
• There is voltage in all phases of the supply line.
• All fuses have power and that they are securely fastened to the fuse
holders.
• The overload protection is not tripped.
• The motor cable is not damaged.
Clean:
• The impeller
• The sump in order to prevent the impeller from clogging again.
Product Description
Remedy
Check that:
• There are no leaks from the piping and/or discharge connection.
• The impeller is not clogged.
• The non-return valve(s) are functioning properly.
• The pump has adequate capacity. For information:
Contact the local sales and service representative.
• Clean the level regulators.
• Check the functioning of the level regulators.
• Check the contactor and the control circuit.
• Replace all defective items.
Raise the stop level.
Product Description
Remedy
Check that:
• The distance between the start and stop levels is sufficient.
• The non-return valve(s) work(s) properly.
• The length of the discharge pipe between the pump and the first non-
return valve is sufficiently short.
Troubleshooting
(page 9).
(page 9).
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