Troubleshooting Checklist - Master Plumber 123357 Manual Del Usuario

Troubleshooting

TROUBLESHOOTING CHECKLIST

PROBLEM
Pump will not prime.
Pump delivers water for a period
of time, then stops pumping.
Pump does not deliver rated
capacity.
Motor overheats and shuts off
(overload).
Pump delivers water but will not
shut off.
Pressure switch turns on and off
every few seconds.
Motor fails or does not operate
properly.
DRAINING FOR SERVICING OR FOR WINTER
The pump should be drained before it is disconnected for
servicing or if it is in danger of freezing. To drain:
• Remove drain plug from bottom of pump case.
• Remove discharge tee to vent the pump.
• Drain all piping to a point 3 feet (1 meter) below
ground level.
For parts or assistance, call Master Plumber Customer Service at 1-800-628-9439
(CAUTION: SHUT OFF POWER TO PUMP)
• Not enough water. Stop motor, remove pressure gauge bushing, and fill case and suction
line with water.
• Pump wired incorrectly.
• Plugged venturi tube or nozzle.
• Foot valve is sitting in sand or mud, or is stuck shut, or leaks.
• Low well water level. In deep wells, the ejector as well as the foot valve must be below
water level.
• For the 123353 and 123355, the diffuser O-ring seal may be improperly positioned.
• Air leaks. Check all connections for airtightness.
• Low well water level. Use a water-level tester while pump is operating.
• Plugged venturi tube, nozzle, or impeller parts.
• In deep wells, the regulator may be set incorrectly. See Step 14 in the 4" diameter Deep Well
Installation Instructions.
• Plugged venturi or nozzle.
• Faulty pressure gauge resulting in false readings.
• In deep wells, the operating pressure may be too high. See Step 14 in the 4" diameter Deep
Well Installation Instructions.
• Low well water level. Use a water-level tester while pump is operating.
• For the 123353 and 123355, the diffuser O-ring seal may be improperly positioned.
• Oversubmergence of ejector. In deep wells, if ejector is more than 10 feet below pumping
level, pumping capacity is reduced.
• In deep wells, the ejector may have improper size and depth setting.
• Motor voltage does not match power supply voltage. See pages 2 and 3.
• Improper wire size. See Wire Size Guide on page 3.
• Impeller is rubbing against pump case.
• Impeller neck is worn.
• Defective pressure switch.
• For the 123353 and 123355, the O-ring seal may be improperly positioned.
• Tank precharge pressure too high. Tank precharge pressure must be 1–2 pounds less than
switch turn-on setting.
• In deep wells, the water level may be going below limit of ejector. Use water-level tester
while pump is operating.
• Galvanized storage tank is waterlogged.
• Leaky foot valve.
• Too much tank pressure.
• If within Warranty, return pump/motor unit to place of purchase (with proof of purchase)
for exchange.
POSSIBLE CAUSES
10