FLYGT 3126.290, Installation, Operation And Maintenance Manual

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NOTICE:
Do NOT override the motor protection repeatedly if it has tripped. Doing so may result in
equipment damage.
Cause Remedy
The motor protection is set too low. Set the motor protection according to the data plate and if applicable the
cable chart.
The impeller is difficult to rotate by
hand.
• Clean the impeller.
• Clean out the sump.
• Check that the impeller is properly trimmed.
The drive unit is not receiving full
voltage on all three phases.
• Check the fuses. Replace fuses that have tripped.
• If the fuses are intact, then notify a certified electrician.
The phase currents vary, or they are
too high.
Contact the local sales and service representative.
The insulation between the phases
and ground in the stator is defective.
1. Use an insulation tester. With a 1000 V DC megger, check that the
insulation between the phases and between any phase and ground is >
5 megaohms.
2. If the insulation is less, then do the following:
Contact the local sales and service representative.
The density of the pumped fluid is too
high.
Make sure that the maximum density is 1100 kg/m3 (9.2 lb/US gal)
• Change to a more suitable pump
• Contact the local sales and service representative.
There is a malfunction in the overload
protection.
Replace the overload protection.
Always state the serial number of your product, see Product Description (page 11).
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.
NOTICE:
Do NOT override the motor protection repeatedly if it has tripped. Doing so may result in
equipment damage.
Cause Remedy
The impeller rotates in the wrong
direction.
• If it is a 3-phase pump, then transpose two phase leads.
• If it is a 1-phase pump, then do the following:
One or more of the valves are set in
the wrong positions.
• Reset the valves that are set in the wrong position.
• Replace the valves, if necessary.
• Check that all valves are correctly installed according to media flow.
• Check that all valves open correctly.
The impeller is difficult to rotate by
hand.
• Clean the impeller.
• Clean out the sump.
• Check that the impeller is properly trimmed.
The pipes are obstructed. To ensure a free flow, clean out 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.
Troubleshooting
42 Flygt 3126.290 Installation, Operation, and Maintenance Manual