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RE®JACKET CPT Controller Manual Hard Faults i Hard faults are problems that will shut down the system. They are indicated by a red flashing light on the controller and an audible piezo alarm. (See"Signals and Alarms" in this chapter.) Following is a list of the hard faults in alphabetical order and a description of each. HARD FAULT DESCRIPTION Amps Calibration When calibration of the ampere-monitoring system incorrectly Error functions, the decisions made from the amps measurements can be incorrect. Dry Run A submersible pump is running and no pressure has developed. Fluid is below the inlet of the pump. The "dry run"alarm may also occur as the result of an "air lock." A pump may become air-locked when drop pipes are too close to the submersible pump in bottom- fill applications. Occasionally, the air displaced from the drop hose is expelled into the pump end, air-locking the pump. Failure to Detects the request-to-pump signal but the pump does not Pressurize generate any pressure. This detection occurs 4 seconds after the pump is turned on. The CPT Controller requires pressures >16 psi. If the CPT Controller records three consecutive occurrences of pressure <16 psi, then the Failure to Pressurize fault is indicated. This may be the result of a thermal overload tripping in the motor, an open circuit, or something plugging the inlet of the pump. Limit Error When the current limiting resistor for the capacitor board incorrectly functions, the service circuit breaker can continually trip. Line Leak Detected Shuts down the submersible pump for a 3-gph or greater leak in the line, in accordance with EPA protocol. Locked Rotor Detected if, during any period of operation, the over-current fault of the power module is activated. The processor automatically retries every 5 seconds. If five consecutive occurrences of over-current are recorded, the alarm triggers and the pump shuts down. (Note: The first four occurrences are soft faults; the fifth is a hard fault.) Open Circuit Detected if the drive is On and the output current is less than the open-circuit detection threshold. The processor retries every 5 seconds. If five consecutive occurrences of open circuit are recorded, the alarm triggers and the pump shuts down. Open circuits are wiring faults between the controller and the motor, which shut down the pump. (Note: The first four occurrences are soft faults; the fifth is a hard fault.) Chapter 5:Service and Repair 5-4 ARE260-240 Rev.A ♦ 6/97