Problem: The ammeter needle instantly maxes out and the charger clicks or turns off.
If the charger fails to output power when plugged in and correctly attached to a battery, the fuse may be blown. Unplug the unit entirely. Locate the fuse holder on the front or rear panel.
The Bosch KL 1206 features built-in thermal overload protection. If the charger gets too hot or detects a short circuit, it will temporarily cut power. bosch kl 1206 user manual
The final pages of the user manual offer maintenance advice that is often ignored:
Ensure the clamps are gripping tightly and will not slip off. Step 3: Powering On Problem: The ammeter needle instantly maxes out and
Portable, lightweight (approx. 1.5 kg), and typically features a basic LED gauge or display for monitoring charge status. Operating Instructions
What you are charging (AGM, Gel, Lead-Acid)? What behavior you are seeing on the ammeter needle? The approximate age of your charger? Locate the fuse holder on the front or rear panel
Bosch KL 1206 (often referred to as the Battmax Automatic KL 1206