5. OPERATION PROBLEMS
PROBLEMS
POSSIBILI CAUSES
SOLUTIONS
The pump does not start
1. Problems on the suction part
2. By pass valve open
3. Blades blocked
4. Leak from the gaskets
5. Excessive wear of the impeller and blades
6. Blocked overflow
1. Check that there are no leaks in the suction part
2. Check and clean the valve: it must move freely
3. Check and clean the blades and the housings:
they could be worn, dented or dirty
4. Tighten further the covers and the joints: they
could be loose
5. Check the impeller and the blades: they could be
too worn
6. Check the pump outlets, the pipe , the NOZZLE
and also the filter
The pump vibrates but does not
operate
1. Dirt in the hollows of the pump
2. Defective motor
3. Broken key of motor
1. Clean these hollows
2. Contact the seller
3. Remove the debris and substitute the key
Low delivery problems
1. Too much dirt in the filters
2. Problem of the suction part
3. Blocked by pass valve
4. Blocked blades
5. Excessive wear of the blades and the impeller
6. Damaged pipe or distribution NOZZLE
7. Closed filter
8. Level of liquid in the tank low
1. Clean the filters
2. Check that there are no limitations or leaks in the
suction part: it could be too small, too long or not
sealing any longer
3. Check state of valve
4. Check the blades and their housings
5. Check state of blades and impeller
6. Substitute pipe or NOZZLE
7. Substitute the filter
8. Fill up the tank
The pump rotates slowly
1. Incorrect voltage
2. Blocked blades
3. Problems at electric contacts
4. Problems at the motor
1. Check the electrical plant while the pump is in
operation
2. Check the blades and the housings
3. Check that the contacts are not loose
4. Contact the seller
Power loss of the motor
1. Blocked by pass valve
2. Low voltage
3. Excessive wear of the impeller or of the blades
4. Debris in the hollow of the pump
1. Check the state of the valve
2. Check the current of the plant while the pump is
in operation
3. Check the state of the blades’ impeller
4. Clean the pump hollows
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AF 3000 - AF 3000 TAG