Xylem Flygt Concertor 6020, Installation, Operation And Maintenance Manual

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WARNING: Electrical Hazard
The permanent-magnet motor generates voltage when the shaft rotates, even if power
sources are disconnected. Never perform any electrical work if the shaft could rotate.
NOTICE:
Do NOT override the motor protection repeatedly if it has tripped. Doing so may result in
equipment damage.
Cause Remedy
One or more of the valves are set in
the incorrect positions.
• Reset the valves that are set in the incorrect position.
• If necessary, replace the valves.
• Check that all the valves are installed correctly according to the media
flow.
• Check that all the valves open correctly.
The impeller is difficult to rotate by
hand.
• Clean the impeller.
• Clean the sump.
• Check that the impeller is trimmed correctly.
The pipes are obstructed. To make sure that there is a free flow, clean the pipes.
The pipes and joints leak. Find the leaks and seal them.
There are signs of wear on the
impeller, pump, and casing.
Replace the worn parts.
The liquid level is too low. • Check that the level sensor is set correctly.
• Depending on the installation type, provide equipment for the pump
priming, for example, a foot valve.
The Setpower is too low. Change the settings. For more information, see the User Guide.
The impeller rotates in the incorrect
direction. The connections inside the
drive unit are incorrect.
Contact the local sales and service representative.
If the problem persists, contact the local sales and service representative. Always state the
product number and the serial number of your product.
9 Troubleshooting
Concertor ™ 6020 Installation, Operation, and Maintenance Manual 47