Hayward HCP Pump HCP Series LITCPOMA10 - Page 21

TROUBLESHOOTING 11. Troubleshooting SYMPTOM PUMP RUNS, BUT NO WATER DELIVERED NOT ENOUGH WATER DELIVERED NOT ENOUGH PRESSURE EXCESSIVE VIBRATION ABNORMAL NOISE PUMP STOPS OVERHEATING PROBABLE CAUSE GROUP 1 ELECTRICAL GROUP 2 MECHANICAL GROUP 3 SYSTEM ABCDEFGH I JABCDABCD •• •• • •• • • •• •• ••• • •• ••• • •• •••• • •• • ••• •• •• • CAUSE CORRECTIVE ACTION 1. ELECTRICAL A. NO VOLTAGE IN POWER SYSTEM Check phase-to-phase on line side of starter contactor. Check circuit breaker or fuses. B. NO VOLTAGE ON ONE PHASE Check phase voltage on line side of starter contactor. Isolate open (THREE PHASE UNITS) circuit (circuit breaker, fuse, broken connections, etc.) C. LOW VOLTAGE AT MOTOR Running voltage across each leg of motor must be ± 10% of nominal voltage shown on nameplate. D. MOTOR LEADS IMPROPERLY GROUPED Refer to lead grouping diagram on motor nameplate. FOR VOLTAGE E. CONTROL FAILURE Check control device, starter contactor, H-O-A selector switch, etc., for malfunction. F. THERMAL OVERLOAD SWITCH OPEN Check for drag or other overload. G. INSULATION FAILURE Check motor or windings to ground with megohmmeter. H. OPEN WINDINGS Check leg-to-leg with ohmmeter. I. FREQUENCY VARIATION Check frequency of power system. Must be less than 5% variation from motor nameplate rating. J. WRONG DIRECTION OF ROTATION Reverse rotation of three phase motor by interchanging any two leads. See Manufacturer's Instructions for reversing single phase motor. 2. MECHANICAL A. FLOW THROUGH PUMP COMPLETELY Locate and remove obstruction. Refer to Repair Instructions for disassembly. OR PARTIALLY OBSTRUCTED B. PUMP NOT PRIMED Reprime. Inspect suction system for air leaks. C. INTERNAL LEAKAGE Check impeller for wear of controlled clearances. (See Repair Instructions.) D. LOOSE PARTS Inspect, repair. 21