Table 4-1.  Troubleshooting Cont’d. CAUSE OF TROUBLE CHECKING PROCEDURE CORRECTION E. Bound Pump - and motor caused by wedging in a by temporarily rever- con't. crooked well or rough handling at sing black and red leads installation.  Locked rotor readings in control box then re- can also indicate a sand bound turning to normal.  If pump.  Amp readings 3 to 6 pump does not rotate times higher than normal will be freely it must be indicated. pulled and cleaned or realigned and the well condition corrected. F. Defective cable Attach one ohmmeter lead to the The pump must be or motor wind- drop pipe or well casing and touch pulled and the cable ind the other lead to each motor disconnected and insp- lead.  If the needle moves appre- ected.  Damaged cable ciably a ground is indicated in should be correctly either the motor or the drop spliced or replaced.  If cable. cable is good, the motor winding is grounded. 1. Shorted or Disconnect motor leads from con- The pump must be open trol box, note length and size of pulled and motor or drop cable and use ohmmeter to drop cable repaired check resistance.  Low ohms may or replaced. indicate shorted motor winding. High resistance (no movement of needle) can mean an open circuit in winding or broken but not ex- posed lead cable conductor. MOTOR DOES NOT START -- FUSES DO NOT BLOW A. No power Check fuses or circuit breaker. Replace fuses or reset breaker. B. Defective pressure   Check voltage across pressure Clean contact points switch switch with contact closed.  If or replace switch. voltage drop is equal to line volt- age the switch is not making contact. C. Defective wiring Check for loose or corroded conn- Correct faulty wiring ections.  Check motor lead term- or connections. inals with voltmeter for power. PUMP RUNS BUT DELIVERS LITTLE OR NO WATER A. Air locked pump Pump can be heard running but no Normal delivery may re- water noise is detected. sume if pump is started and stopped at one min- ute intervals. 4-14