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RE ,/� CPT Controller Manuel <br /> Guide to Troubleshooting <br /> Symptom Probable Cause Suggested Action <br /> Cooling fan does not run. AC input wiring incorrect; or Check wiring diagram. <br /> dispense-enable signal has not <br /> been received. <br /> Dry run detected. ♦ Low product level. Check fuel level. <br /> ♦ Ground fault in motor. <br /> ♦ Shorted controller <br /> ♦ Shorted wiring. <br /> Excessive current/trip Locked pump rotor. ♦ Pull pump and check for stuck <br /> breakers. parts. <br /> ♦ Measure insulation resistance <br /> of motor. <br /> ♦ Check controller and wiring for <br /> shorts to ground. <br /> Extended pump run. Pump has run for 6 hours. ♦ Check dispenser input signal. <br /> ♦ Confirm dispenser activity. <br /> Fail to pressurize alarm on ST Improper ST software. Call RJ Tech Support for updated <br /> when connected to CPT. software. <br /> Failure to pressurize. ♦ Low product in tank. ♦ Check fuel level. <br /> ♦ Plugged pump outlet. ♦ Remove check valve and let <br /> fuel drain back to tank. <br /> Line leak detected. Leak has been detected in line. Check line for leaks. <br /> Locked rotor or short circuit. ♦ Locked pump rotor. ♦ Pull pump and check for stuck <br /> ♦ Ground fault in motor. parts. <br /> ® Shorted controller. ♦ Measure insulation resistance <br /> ♦ Shorted wiring. of motor. <br /> ♦ Check controller wiring for <br /> shorts to ground. <br /> Mechanical pump problems. Dragging impellers, bearings, Call RJ Tech Support. <br /> or internal parts in the pump <br /> and motor. <br /> No dispenser activity. Lost signal from dispenser. Check wiring. <br /> Open circuit, or no current. Open wiring circuit between Check wiring. <br /> controller and pump. <br /> Over temperature. Cooling fan failure or excessive Check fan for proper operation. <br /> current. See excessive current solution <br /> above. <br /> Pressure reading from Noise is being induced on Check grounding;confirm that <br /> transducer reads accurately transducer wiring. transducer wire is shielded. All <br /> when pump is not running, but grounding must be attached to an <br /> is erratic when pump is earth ground. <br /> running. <br /> Chapter 5:Service and Repair 5-8 ARE260-240 Rev.A ♦ 6/97 <br />