Cause Remedy
• 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.
The impeller is stuck. Clean:
• The impeller
• The sump in order to prevent the impeller from clogging again.
If the problem persists, refer to the Flygt Service Guide on the web or contact the local
Xylem service shop. Always state the serial number of your pump when you contact Xylem,
see Product Description (page 12).
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.
WARNING:
Electrical hazard. A permanent magnet motor produces voltage when the shaft is rotating.
The conductors must be insulated.
Cause Remedy
The pump is unable to empty the
sump to the stop level.
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 Xylem service shop.
There is a malfunction in the level-
sensing equipment.
• Clean the level regulators.
• Check the functioning of the level regulators.
• Check the contactor and the control circuit.
• Replace all defective items.
The stop level is set too low. Raise the stop level.
If the problem persists, refer to the Flygt Service Guide on the web or contact the local
Xylem service shop. Always state the serial number of your pump when you contact Xylem,
see Product Description (page 12).
The pump starts-stops-starts in rapid sequence
Cause Remedy
The pump starts due to back-flow
which fills the sump to the start
level again.
Check that:
Troubleshooting
Flygt 3153 Installation, Operation, and Maintenance Manual 63
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