Submersible Troubleshooting-D

CAUSE OF TROUBLE	HOW TO CHECK	HOW TO CORRECT
1. Incorrect voltage.	Check line voltage terminals in the control box (or connection box in the case of 2-wire models) with a voltmeter. Make sure that the voltage is within the minimum-maximum range prescribed by the manufacturer.	If voltage is incorrect, contact power company for service.
2. Overheated overload protection box.	If sunlight or other source of heat has made box too hot, circuit breakers may trip or fuses blow. If box is hot to the touch, this may be the problem.	Ventilate or shade box, or remove the source of heat.
3. Defective control box components (skip this for 2-wire models).	Using an ohmmeter, determine the resistance across the running capacitor. When contact is made, the ohmmeter needle should jump at once, then move up more slowly. No movement indicates an open capacitor (or defective relay points); no resistance means that the capacitor is shorted. Using an ohmmeter, check the relay coil. Its resistance should be as shown in the manufacturer’s literature. Recheck ohmmeter reading across running capacitor. With a good capacitor, no movements of the needle indicates relay points.	Replace defective components.
4. Defective motor winding or cable.	Check the resistance of the motor winding by using an ohmmeter on the proper terminals in the control box (see manufacturer’s wiring diagram). The resistance should match the ohms specified in the manufacturer’s date sheet. If too low, the motor winding may be shorted. If the ohmmeter needle does not move, indicating high or infinite resistance, there is an open circuit in the motor winding. Ground one lead of the ohmmeter onto the drop pipe or shell casing, then touch the other lead to each motor wire terminal. If the ohmmeter needle moves appreciably when this is done, there is a ground in either the cable or the motor winding.	If neither cable or winding is defective, shorted, grounded or open - pump must be pulled and serviced.
5. Pump becomes sand-locked.	If the fuses blow while the pump is operating, sand or grit may have become wedged in the impeller, causing the rotor to lock. To check this, pull the pump.	Pull pump, disassemble and clean. Before replacing, make sure that sand has settled in well. If well is chronically sandy, a submersible should not be used.

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