Xylem FLYGT Concertor, 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.
Cause Remedy
The pump starts due to back-flow. The
back-flow fills the sump to the start
level again.
Check the following:
• The distance between the start and stop levels is sufficient.
• The non-return valves work correctly.
• The length of the discharge pipe between the pump and the first non-
return valve is sufficiently short.
The self-holding function of the
contactor malfunctions.
Check the following:
• The contactor connections
• The voltage in the control circuit in relation to the rated voltages on the
coil
• The functioning of the stop-level regulator
• The voltage drop in the line at the starting surge, if it causes the self-
holding malfunction of the contactor or not
The power supply is incorrect. The
sum alarm is active after ten cycles.
Contact a sales or authorized service representative or use the Dirigo ™
Service Tool application to read the alarm codes.
If the problem persists, then contact a sales or authorized service representative.
Always state the product number and the serial number of the product.
8.8 The pump delivers too little or no water
DANGER: Crush Hazard
Moving parts can entangle or crush. Always disconnect and lock out power before
servicing to prevent unexpected startup. Failure to do so could result in death or serious
injury.
Equipment
locked
out
by
Name
.......................
DANGER
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.
8 Troubleshooting
6020.180/090 Installation, Operation, and Maintenance Manual 53