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CPT Controller Manual RE®.jA HARD FAULT DESCRIPTION Over-temperature Occurs if, during any period of operation, the over-temperature fault of the power module is activated (i.e., when the temperature inside the controller gets too hot, >100°C in the power module). This may indicate fan failure. The thermal-measuring device on the power module communicate the temperature of the Inverter board to the processor; if the temperature exceeds 100°C, the pump shuts down. (Note: The first four occurrences are soft faults; the fifth is a hard fault.) Pressure Detects the presence of the pressure transducer by monitoring the Transducer Failure signal. If the CPT Controller senses an abnormal voltage (with Leak sustained for 15 seconds, it indicates a fault condition. If the Detection enabled) transducer fails while the drive is On, it will default to a fixed speed. If leak detection is enabled, the next Off cycle will shut down the system. Reverse Rotation During the first dispense-enable signal, immediately following a (with Reverse power-up cycle, the CPT Controller performs this self-diagnostic Rotation activated) by checking the pressure while running the pump-motor at three different speeds. If the pressure does not achieve the proper levels, a"Reverse Rotation"fault is indicated. Note: This test assumes the pressure signal being applied to the CPT is proper. Short Circuit Short circuits or ground faults may occur inside the controller, motor, or anywhere in the wiring. Short circuits are 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.) Soft Faults Soft faults are indicated by a yellow flashing light. (See "Signals and Alarms" in this chapter.) Following is a list of soft faults in alphabetical order and a description of each. SOFT FAULT DESCRIPTION Extended Pump Run When the CPT Controller senses the pump running for more than 6 hours continuously and the dispense-enable signal occurs, this fault is indicated. A continuously running pump will prevent leak detection from taking place because leak detection occurs while the pump is off. This fault may also indicate a constant signal coming from the dispense-enable switch. The pump will continue to operate if this fault occurs. ARE260-240 Rev.A ♦ 6/97 5-5 Chapter 5:Service and Repair