Xylem IM226R02 CP-Series Submersible Motors - Manual (Page 22)

20 CP-Series Submersible Motors Installation, Operation and Maintenance Manual
Troubleshooting of Submersible Motors
X. Troubleshooting of Submersible Motors
1. Motor does not start but does not blow fuses or relay.
• No Power Supply → Replace fuses, breakers or check for loose or corroded connections and motor lead
terminals.
• Defective Connections → Correct connections.
2. Fuses or relay blow when motor starts.
• Incorrect Voltage → Apply correct voltage.
Voltage must be ±10% of rated (Nameplate).
• Incorrect Fuses or Relay → Replace with proper fuses and relay.
• Defective Capacitors → Replace with proper capacitors.
• Wrong Connections → Correct wrong connections or short circuit.
• Locked Rotor Conditions → Correct pump or well conditions.
• Insulation Resistance Down → Check the line and correct.
3. Motor runs for a while and then blows fuses or relay.
• Low Voltage or High Voltage → Apply rated voltage.
• Defective Capacitors → Replace with proper capacitors.
• Different Control Box for the Motor → Replace with proper control box.
• Defective Starting Voltage Relay → Replace with proper relay.
• Pump is Sand Clogged → Pull pump and clean well.
• Overheated Protector → Shield the control box from heat source.
The following conditions are stated to provide the owner with a list of criteria for maximum motor life
and to assure motor warranty.