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5018 Internal Fault STUCK FUEL VLV Stuck Fuel Valve System Severity Level 3 The software performs a test during the prepare-to-start sequence to determine if the valve has failed in the open position. It commands ìopenî the shutoff solenoid and records the inlet pressure (Fuel Inlet PHP). It also commands ìopenî pilot solenoids, and if the difference of (Fuel Inlet PHP - Present Value) is greater than 17 psig, a stuck fuel valve fault is reported. Symptom Probable Cause Analysis Repair Solution Valve does not maintain a Delta- P across the valve during leak check at start. Fuel supply Logic uses pressure readings to verify valve is not stuck open. Delta-P reading is not accurately measured when no fuel is supplied. Verify proper fuel pressure is applied to the valve. Water in Transducer Harness In humid environments temperatures near the MicroTurbine can reach the dew point. Water in the back of the connector will short the signal wires. Dry Pressure Harness. Loose Transducer connections Connections can come loose through handling of device or during compo- nent changing. Secure Pressure Harness at Inlet and Exit Transducer and at Fuel Controller. Debris in valve Valve can have debris that causes it to become temporarily stuck open. Lightly tap valve body and attempt restart. Fuel Control Valve Stuck Open Fault is continuously reported after several start attempts. Replace Fuel Control Valve. Inlet Pressure Trans- ducer reading Situation persists and inlet pressure is never measured during the start sequence. Replace Inlet Pressure Transducer. Closed Fuel shutoff valve Inlet pressure is still not read during start sequence after inlet transducer is replaced. Replace Fuel Shutoff Valve (See Work Instr. 440003). Exit Pressure Transducer reading Situation persists and exit pressure never goes to zero during start sequence. Replace Exit Pressure Transducer. Pressure Transducer Harness After replacing pressure trans- ducers, pressure readings still do not provide correct readings during start. Replace pressure transducer harness. Observe Safety Precautions - Refer to Safety Instructions for Details 430001-001 Rev E (July 2004) 6-26 Model C30 Troubleshooting Guide This information is proprietary to Capstone Turbine Corporation. Neither this document nor the information contained herein shall be copied, disclosed to others, or used for any purposes other than the specific purpose for which this document was delivered. Capstone reserves the right to change or modify without notice, the design, the product specifications, and/or the contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction.PDF Image | SERIES 5000 FAULT CODES Package Faults
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