Xylem FLYFT P7900, Инструкция по установке, эксплуатации и обслуживанию

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Always state the serial number of the product, see
Product Description
on page 10.
7.5 The pump runs but the motor protection trips
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 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 a sales or authorized service representative.
The insulation between the
phases and ground in the stator is
defective.
See
Check the insulation, up to 1 kV drives or generators
on page
51.
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 the impeller, or
• Change to a more suitable pump
• Contact a sales or authorized service representative.
There is a malfunction in the
overload protection.
Replace the overload protection.
Always state the serial number of the product, see
Product Description
on page 10.
7 Troubleshooting
70 P7900 Installation, Operation, and Maintenance Manual