Do you have an attendant that never seems to turn itself off? Read on.
The attendant is designed to be on whenever the engine is running, as well as for a period after the engine has been shut off. To accomplish that, the attendant receives two signals from the bus's electrical system: one supplies power only if the engine is on, and another supplies power from the battery whether or not the engine is on. The attendant uses these two signals plus internal logic to determine how long to stay on after the engine is shut off.
From this, we can deduce that if the attendant is not shutting down when it should, one of two things is happening:
- There might be a wiring problem that causes power to be supplied to the "engine on" signal even when the engine is off. Or, related, there might be a poor connection between the bus's wiring and the attendant. This is the most common cause.
- There might be an internal attendant problem. A sensor might be faulty, or there might be a software problem. This is less common but it happens too.
If an attendant remains on longer than it should, here is what to do:
- If the attendant has a red reset button, press it. If not, disconnect the attendant's power connector for ten seconds, then reconnect it. If the cause of the difficulty is a software problem, doing this -- the equivalent of turning it off and back on again -- should clear it.
- Confirm that all connectors from the bus's electrical system to the attendant are snug and show no signs of wear, oxidation, or damage. Unplugging, inspecting, and replugging should do the trick.
- Check the bus's electrical system, and in particular that the engine signal wire is supplying voltage when the engine is running and that it does not supply voltage when the engine is off.
If the problem persists after taking the above steps, notify Transportant at
support@transportant.com. Mention the steps you have already taken and what you observed, so that we do not waste your time by suggesting things you have already tried.
As we assist you, you might want to consider unplugging the attendant's power connector when the bus has finished its runs for the day, and plugging it back in the next morning. This would be a temporary measure to avoid discharging the bus's battery overnight and perhaps shortening its life.
For background information on how the attendant interacts with the bus's electrical system, see the
Bus Power & Battery Guide.
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