Cause Remedy
The inlet strainer is clogged. • Pull the pump from the well.
• Clean the inlet strainer.
• Rinse out the pump and re-install it.
The pump is worn. • Pull the pump from the well.
• Repair as necessary.
• Rinse out the pump and re-install it.
9.4.4 The pump cycles too much
Cause Remedy
The pressure switch is not properly adjusted or is defective. • Re-adjust the switch or replace it if it is defective.
The level control is not properly set or is defective. • Re-adjust the setting; refer to the manufacturer data. Replace the
level control if it is defective.
The pressure in the diaphragm tank is insufficient or the tank or
piping is leaking.
• Repair or replace any damaged components.
The snifter valve or bleed orifice are plugged. • Clean and/or replace any defective snifter valve or bleed orifice.
The tank is too small. • Replace it with a proper size tank.
9.4.5 Fuses blow or circuit breakers trip
Cause Remedy
The voltage is too high or low. • If the cable size is correct, contact the power company. If not,
correct and/or replace as necessary.
The three-phase current imbalance is too high. • If current imbalance is not within ± 5 %, contact the power supply
company.
The control box wiring and components are incorrect or defective
(single-phase only).
• Correct as required.
The capacitor is defective (single-phase only). • Check the capacitor with an ohmmeter.
• If there is no ohmmeter needle movement, replace the capacitor.
The starting relay is defective (certain types of single-phase only). • Replace any defective starting relay.
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