Check battery voltage and ensure it is less than 16.5 V. If battery voltage is higher than 16.5 V either a wrong battery is connected or battery is broken.
Replace battery with battery that sup- plies DC power according to techni- cal data (see data plate).
In case vehicle is connected to AC power check if battery is charging.
If battery is charging check charging voltage (must be lower than 16.5 V to assure proper function whilst charging).
Possible cause: Battery voltage high