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Veeder-Root PLLD Quick Help

Veeder-Root PLLD Quick Help

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Manual 577013-727 Revision B
PLLD/WPLLD
Alarm Quick Help

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Summary of Contents for Veeder-Root PLLD

  • Page 1 Manual 577013-727 Revision B PLLD/WPLLD Alarm Quick Help...
  • Page 2 NOTICE Veeder-Root makes no warranty of any kind with regard to this publication, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. Veeder-Root shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this publication.

  • Page 3: Table Of Contents

    Short Alarm (PLLD Only)(Pre 19 Only)........

  • Page 4: Introduction

    Refer to the following manuals for more detailed information: DOWNSTREAM of the Check Valve (such as at the emergency 577013-344 PLLD Troubleshooting Guide, or shut-off valve). DO NOT measure pressure at the STP. 577013-484 WPLLD Troubleshooting Guide...

  • Page 5: Gross Line Fail Alarm

    4. Partially clogged functional element (R. Jacket STP)(Pre 19). Troubleshooting Guidelines: 5. STP contactor relay not closing or relay sticking - PLLD ONLY. Retest line to determine if failure is repeatable or is intermittent. If 6. Faulty check valve (FE Petro or SwiftCheck Valve); check relief the test passes, the problem is intermittent.

  • Page 6: Periodic Or Annual Test Fail Alarm

    PERIODIC OR ANNUAL TEST FAIL ALARM Pump-on pressures indicate a Periodic (0.20 gph) or Annual Check for dispenser solenoid valve leakage by squeezing (0.10 gph) line leak test failure has occurred. each nozzle with STP On and dispenser switched Off. If dispensers are blenders, check for blend valve leakage by Probable Causes: looking for meter movement (no dispensing and STP On).

  • Page 7: High Pressure Warning/Alarm (Pre 19)

    HIGH PRESSURE WARNING/ALARM (Pre 19) Excessive line pressure when STP is switched Off. Note: the the console - e.g., Healy vapor recovery (PLLD only). pressure thresholds vary; see Table I, Appendix A, Page 15. Bad PLLD Interface Module (PLLD only).

  • Page 8: Line Equipment Fault Alarm(Ver. 19 And Higher)

    LINE EQUIPMENT FAULT ALARM (Ver. 19 and Higher) The pressure monitors have determined that there is a fault with 5. In the PLLD/WPLLD diagnostic menu, run the pressure mea- the pressure measurement system. surement offset test. WARNING!: WPLLD turns On the pump to make a pres- Probable Causes: sure measurement.

  • Page 9: Comm Alarm (Wplld Only)

    COMM ALARM (WPLLD Only) The WPLLD pressure transducer transmits pressure readings on Comm Module faulty. the 220 Vac STP power lines. The readings are transmitted in Bad connection between the AC Interface Module and short bursts (1/2 second) every eight seconds. After four min- Comm Module.
  • Page 10 COMM ALARM (WPLLD Only) - Cont’d TROUBLESHOOTING GUIDELINES Determining if the problem is transmission related: Manually start a test on the line that has the Comm alarm. The Determining if the problem is noise related: STP will be switched on for 10 seconds to pressurize the line. With all the STPs Off, examine the lights on the AC Interface Watch the lights on the AC Interface Module for a short burst of Module.

  • Page 11: Continuous Pump On Warning/Alarm (Pre 19) / Continuous Handle Alarm (Ver. 19 And Higher)

    Dispenser switch is continuously On - verify that all dis- penser switches are Off. Excessive dispenser leakage voltage - measure pump-in voltage with all dispensers switched Off; a reading >30 Vac indicates excessive leakage. Install an isolation relay between the dispenser and the PLLD Controller Module (reference Manual 577013-344).

  • Page 12: Fuel Out Alarm

    FUEL OUT ALARM This alarm occurs when the fuel level is below 10 inches and a gross line test has failed. The alarm will clear when the fuel level exceeds 10 inches. NOTE: The fuel level does not include the programmable tilt value and may therefore be different from the height reading dis- played.

  • Page 13: Low Pressure Alarm

    LOW PRESSURE ALARM This alarm indicates a Low Pressure condition was detected while dispensing. The low pressure threshold is programmable from 0 - 25 psi (a low pressure threshold of 0 disables the low pressure monitor). Probable causes: Large line leak (inspect visible areas of piping, dispensers, and STP) Tank is empty.

  • Page 14: Open Alarm (Plld Only)

    OPEN ALARM - PLLD ONLY When the pressure transducer is not connected to the PLLD Interface Module the pressure reading is negative. Note: Diag- nostic screen will display 0 when pressures are negative. Probable Causes: Open condition in the field wiring.

  • Page 15: Short Alarm (Plld Only)(Pre 19 Only)

    SHORT ALARM - PLLD ONLY (Pre 19 Only) This alarm occurs when the pump-On and pump-Off pressures are reading the same value and are within the range of 5 to 15 psi. Probable causes: STP did not switch On. Low STP pump pressure.

  • Page 16: Periodic Or Annual Test Warning (Pre 19) / Periodic Or Annual Test Needed Warning (Ver. 19 & Higher)

    Periodic or Annual Test Warning (Pre 19) / Periodic or Annual Test Needed Warning (19 & Higher) The system failed to complete or pass a Periodic (0.20 gph) or message X out of 10 tests, indicates how many tests have Annual (0.10 gph) test in the programmed number of days.

  • Page 17: Setup Data Warning

    SETUP DATA WARNING This alarm occurs when an error has been made in program- ming. In Version 17 and later, this will also occur if the line length has not been programmed. The line length default is 501 feet and will cause a SETUP DATA WARNING if the Service Contrac- tor does not enter the line length.

  • Page 18: Appendix A - Tables

    APPENDIX A - TABLES TABLE I - High Pressure Thresholds & Warning/Alarm Software Version High Pressure Limit TABLE II - Typical Line Pressure 40 psi warning STP Status Pressure Range Gauge vs. Console 50 psi alarm & shutdown 17 - 25 psi ±5 psi 16 A &...

  • Page 19: Appendix B - Theory Of Operation

    APPENDIX B - THEORY OF OPERATION PLLD 3.0 gph Test Protocol Take the second pump-off pressure reading P The 3.0 gph line leak test is performed immediately after the Compare the drop from P to P , if it exceeds the 3 gph last dispense cycle has been completed.
  • Page 20 Manual 577013-727 Revision B...

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