The charger has switched to error mode. What could the problem be?
1. First check that the charger is connected correctly. Check that the positive clamp (or eyelet) is connected to the battery's positive pole (or the positive charger terminal) and the negative clamp (or eyelet) is connected to the chassis (or the negative charger terminal), and not the other way round.
2. To exclude the possibility of a problem with the charger, test it on another battery.
3. The charger may have discovered a problem inside the battery. The charger will try repeatedly to continue, but if it cannot, it will switch over to error mode.
Depending on where in the programme the charger has stopped, it is possible to identify a number of causes. If the Check light and Error indicator (!) are both lit at the same time, try restarting the charging cycle by unplugging the charger from the outlet and plugging it in again. If it stops again at the same point, the battery is sulphated and probably needs to be replaced. There can be other problems with the battery that mean that the charger can't go beyond Check mode.
If the charger enters error mode when "Charge" is lit, it is due to a problem with the battery's ability to retain charge. This can also happen if the loads on the battery are too great, making the voltage decrease too quickly. Disconnect these loads and try again.
What's new about the START/STOP charger?
START/STOP has been developed for modern cars with a start-stop system. It's simple to use as it doesn't have a programme button (mode button) – it starts working as soon as it's connected to a battery and is plugged into a wall socket. It's also easy to understand, as it only has three LEDs which show which phase it's currently in: Check, Charge or Care.
What do the three stages on the charger mean?
Check mode means that the charger is checking the battery’s state of health and preparing to charge. If the battery is in good condition, the Check stage doesn't take more than a few moments.
The Charge mode LED shows while the charger is filling the battery, and Care shows when the battery is fully charged and the charger has automatically switched over to maintenance charging.