La Marche TPSD Installation And Operation Manual
Also see for TPSD: Instructions
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Contents
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132.5.2 Understanding the AlarmsEach alarm indication relay in the TPSD is designed as fail-safe. This means that under a complete systemmalfunction with all alarm relays de-energized, each alarm will indicate its correct state. Table 9 shows whatstate each alarm relay is in under normal running conditions of the charger, no alarms are present.Alarm Relay State of the Relay Normally OpencontactsNormally ClosedcontactsHVSD De-energized Open ClosedHIGH DCV De-energized Open ClosedLOW DCV Energized Closed OpenNEG GND De-energized Open ClosedPOS GND De-energized Open ClosedAC POWER FAIL Energized Closed OpenSUMMARY Energized Closed OpenLOW DCA Energized Closed OpenTheHVSD ALARM will trigger if the output DC voltage of the charger rises above the alarm threshold forlonger than 20 seconds, red “HVSD” LED will turn on. This is usually due to the failure of an internal chargercomponent, but could also be the result of maladjustments of the output voltage settings. If the high DCvoltage shut down alarm activates the DC output of the charger shuts off the charger to prevent irreversibledamage to the battery. See Section3.5.1 CUSTOMER CALIBRATION for information on viewing and adjustingthe threshold value.TheHIGH DCV ALARM will trigger if the output DC voltage rises above the specified voltage threshold of thealarm for longer than 5 seconds, red “HIGH VOLTAGE” LED will flash. This is usually caused by maladjustmentsof the output voltage settings, or in rare cases by a failure of an internal charger component. See Section3.5.1CUSTOMER CALIBRATION for information on viewing and adjusting the threshold voltage.TheLOW DCV ALARM will trigger if the DC voltage drops below the specified voltage threshold of the alarmfor longer than 5 seconds, red “LOW VOLTAGE” LED will turn on. This is usually due to an AC Failure, or thecharger is overloaded into deep-current limit. It could also be caused by maladjustments of the output folagesettings, or in rare cases by a failure of an internal charger component. See Section3.5.1 CUSTOMERCALIBRATION for information on viewing and adjusting the threshold voltage.TheNEG GND ALARM will trigger if any current between the negative terminal of the battery and earthground is measured, red “GROUND DETECTION” LED will turn on. A negative ground alarm would signify thatthe negative terminal of a floating battery has become grounded. If the charger has ground detection disabledthis alarm will not function.ThePOS GND ALARM will trigger if any current between the positive terminal of the battery and earth groundis measured, red “GROUND DETECTION” LED will flash. A positive ground alarm would signify that the positiveterminal of a floating battery has become grounded. If the charger has ground detection disabled this alarm willnot function.Table 9 – State of each Alarm Relay (No alarms present) |
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