DAE Pumps Sonora S330, Instruction Manual

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Problem Cause Action
Pump starts
and stops
1. Pump motor overheat
2. Back running water
3. Wrong adjusted level control
4. Too small pump pit
5. Liquid density too high
1. Raise water level
For
Sonora
Sludge pumps, water level can be too low for sufficient cooling. Lay the pump down.
Water temperature too high, decrease temperature
Pump strainer clogged, clean system
Too low voltage create over current and over temperature, shorten cable, avoid cable coil or use larger cable
section
Wrong rotation sequence (if no built in supply control relay) can create over current and over temperature.
Correct the phase sequence
2. Use non return valve to avoid water running back
3. Optimize level control
4. Use a smaller pump
5. Manually set start and stop cycles to get enough time for cooling of motor
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