Xylem Flygt Concertor 6020, Installation, Operation And Maintenance Manual

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If the problem persists, contact the local sales and service representative. Always state the
product number and the serial number of your product.
9.5 The pump does not receive commands from the gateway
Cause Remedy
There is no communication between
the pump and the gateway.
1. Check the power supply to the gateway.
2. Make sure that the indicator PUMP COMMS is lit.
3. Restart the gateway.
4. Check T3 and T4.
If the problem persists, contact the local sales and service representative. Always state the
product number and the serial number of your product.
9.6 The pump starts-stops-starts in rapid sequence
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.
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 the local sales and service representative or use the Dirigo ™ Service
Tool application to read the alarm codes. For more information, see Alarms
and messages on page 33.
If the problem persists, contact the local sales and service representative. Always state the
product number and the serial number of your product.
9.7 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.
9 Troubleshooting
46 Concertor ™ 6020 Installation, Operation, and Maintenance Manual