| Fault Message |
Problem / Condition |
Possible Cause |
| SF Amps Set Too High |
SF Amps setting above 359 Amps |
Motor SF Amps not entered |
| Phase Reversal |
Reversed incoming voltage phase sequence |
Incoming power problem |
| Under Load |
Normal line current |
Wrong SF Max Amps setting |
| Low line current |
Over pumping well
Clogged pump intake
Closed Valve
Loose pump impeller
Broken shaft or coupling
Phase loss |
| Over Load |
Normal line current |
Wrong SF Max Amps setting |
| High line current |
High or low line voltage
Ground fault
Pump or motor dragging
Motor stalled or bound pump |
| Overheat |
Motor temperature sensor has deteced excess motor temperature |
High or low line voltage
Motor is overloaded
Excessive current unbalance
Poor motor cooling
High water temperature
Excessive electrical noise
(VFD in close proximity) |
| Unbalance |
Current difference between any two legs exceeds programmed setting |
Phase loss
Unbalanced power supply
Open delta transformer |
| Overvoltage |
Line voltage exceeds programmed setting |
Unstable power supply |
| Undervoltage |
Line voltage below programmed setting |
Poor connection in motor power circuit
Unstable or weak power supply |
| False Starts |
Power has been interrupted too many times in a 10 second period |
Chattering contacts
Loose connections in motor power circuit
Arcing contacts |
Page 58
