ITT Flygt 5150.350, Инструкция по установке, эксплуатации и обслуживанию

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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, notify a certified electrician.
The phase currents vary, or they
are too high.
Contact the local ITT service shop.
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 megohms.
2. If the insulation is less:
Contact the local ITT service shop.
The density of the pumped fluid is
too high.
Make sure that the maximum density is 1100 kg/m
3
(9.2 lb/US gal)
• Change the impeller, or
• Change to a more suitable pump.
• Contact the local ITT service shop.
There is a malfunction in the
overload protection.
Replace the overload protection.
If the problem persists, refer to the Flygt Service Guide on the web or contact the local ITT service shop.
Always state the serial number of your pump when you contact ITT, see Product Description (page 10).
The pump delivers too little or no water
WARNING:
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, transpose two phase leads.
• If it is a 1-phase pump:
Contact the local ITT service shop.
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. Clean out the pipes to ensure a free flow.
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 (Continued)
42 Flygt 5150.350, 5150.360 Installation, Operation, and Maintenance Manual