Service item Action
Wear on the impeller or surrounding parts necessitates fine adjustments of the impeller
or replacement of worn parts. See Replace the impeller (page 28).
Oil Check the water and oil mixture as follows:
1. Insert a tube or hose into the oil hole.
2. Cover the top end of the tube.
3. Take up a little oil from the bottom.
(Air/oil mixture can be confused with water/oil mixture.)
4. If the mixture contains too much water, in other words if it is heavily emulsified
(creamlike) or if the water has settled out, then change the oil. See Change the
oil (page 27). Check again one week after changing the oil.
Cable entry
1. Check that the following requirements are met:
• The cable clamps must be properly tightened.
• The cable entry must be firmly tightened into its bottom-most position.
• The seal sleeve and the washers must conform to the outside diameter of the
cables.
2. Cut off a piece of the cable so that the seal sleeve closes around a new position
on the cable.
3. Replace the seal sleeve, if necessary.
Inspection
chamber
1
1. Check that the inspection screw is properly tightened.
2. Remove the inspection screw.
3. Drain all liquid, if any.
4. If there is oil in the inspection chamber, then check that the inner mechanical
seal is not damaged. If necessary, contact an authorized service shop.
5. If there is water in the inspection chamber, then do the following:
a. Check that the O-ring is not damaged.
b. Check that the cable entry does not have any leakage.
Cable
1. If the outer jacket is damaged, replace the cable.
2. Check that the cables do not have any sharp bends and are not pinched.
Cooling system If the flow through the system has been partly restricted, then rinse and clean.
Level sensors or
other sensor
equipment
1. Check the functionality.
2. Repair or replace any damaged equipment.
3. Clean and adjust the equipment.
Starter
equipment
1. Check the condition and functionality.
2. Contact an electrician, if necessary.
Insulation
resistance in the
stator
1. Check the insulation between:
• Phase–phase on the stator
• Phase–earth (ground)
The insulation should be > 1 megohm. Use a 1000-VDC megger to test the
insulation.
2. If the resulting value is < 1 megohm, then contact an authorized service shop.
1
Regardless of individual applications, the inspection chamber should not be inspected less frequently than the intervals for normal
applications and operating conditions at media (liquid) temperatures <40°C (104°F).
Maintenance
26 Flygt 2250 Installation, Operation, and Maintenance Manual
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