Troubleshooting Checklist - Ace ESP-75A 3/4 HP Installation Manual

Troubleshooting

TROUBLESHOOTING CHECKLIST

PROBLEM
Pump will not prime.
Pump does not deliver rated
capacity.
Pump loses prime after starting
Pumps vibrates or is noisy
Motor overheats and shuts off
(overload).
Motor fails or does not operate
properly.
(CAUTION: SHUT OFF POWER TO PUMP)
• Not enough water. Stop motor, remove 1-1/2" pipe plug, and fill case with water.
• Pump wired incorrectly. Voltage of pump should match voltage of power supply.
• Plugged impeller, check valve, suction piping, foot valve, or well point.
• Foot valve is sitting in sand or mud, or is stuck shut, or leaks.
• Well depth exceeds pump capacity.
• Leaks. Check all connections for airtightness.
• Leaky shaft seal.
• Insufficient submergence of suction pipe; should be at least 3 feet below water level.
• Pump wired incorrectly. Voltage of pump should match voltage of power supply.
• Plugged impeller, check valve, suction piping, foot vavle, or well point.
• Discharge system head is too great.
• Well depth exceeds pump capacity.
• Pump flow in greater than well flow capability.
• Leaks. Check all connections for airtightness.
• Suction pipe is too small. Should be 1-1/2" pipe.
• Insufficient submergence of suction pipe; should be at least 3 feet below water level.
• Well depth exceeds pump capability.
• Pump flow in greater than well flow capability.
• Leaks. Check all connections for airtightness.
• Insufficient pump foundation.
• Well depth exceeds pump capability.
• Bent shaft, worn motor bearing, or clogged impeller.
• Motor voltage does not match power supply voltage.
• Improper wire size. See Wire Size Guide on page 3.
• Impeller is rubbing against pump case.
• If within Warranty, return pump/motor unit to place of purchase (with proof of purchase)
for exchange.
POSSIBLE CAUSES
7