DiagnosticsAutomatic Control and Runtime Fault AlarmUnder automatic control, vapor pressure readings are compared to user programmable thresholds to determinethe appropriate Pressure Management Device (PMD) state. When the PMD is off and the OVERPRESSURELIMIT is exceeded, an internal relay is enabled and remains so until the pressure drops below the TURN OFFVAPOR PROCESSOR threshold. Automatic control is the default mode.Manual controlIf PMC mode is Manual, the diagnostic menu allows the PMD to be directly turned on/off through the relay. Thisfeature is to support unit operational testing without waiting for the pressure to hit limits. The current UST ullagespace vapor pressure will also be available through the diagnostic menu. The VC1 RS232 command allows forremote control of the PMD when the PMD control is manual. Note: If the PMD is on and the PMC mode isAutomatic, changing the control mode to Manual mode will turn the PMD off.PMC Diagnostic MenuFigure 16. PMC Diagnostic MenusPMC VERSION: 01.00PRESS TO CONTINUESS VAPOR PRESSUREINCHES H2O: -x.xxxS VAPOR PROCESSOR MODEAUTOMATIC selectsAUTOMATIC (default) / MANUALS VAPOR PROCESSOR STATEVP STATE: OFFIf VP mode = MANUAL, and relayconfigured Then, selects ON / OFFS HYDROCARBON SENSORHC SENSOR: XX.XXX%S CLEAR TEST AFTER REPAIRPRESS PROCESSOR STATUS TESTPRESS SCLEAR TEST AND LOGARE YOU SURE? NOS pmcfig4.epsPrints out a copy of thePMC Diagnostic report.See example at right.CFPSTChangeE EnterFunctionPrintM ModeStepTank/SensorKey presssequenceRepress untildesired messageappears in displayKey Legend1 2PMC DIAGNOSTICS----------------------PMC VERSION: 01.00VAPOR PROCESSOR MODEAUTOMATICVAPOR PROCESSOR STATEVP STATE ONPMC DIAGNOSTICPRESS TO CONTINUEDIAG MODEPRESS TO CONTMPFSection 16Pressure Management Control16-19