A quick look on the web suggests Voche® may be an unofficial trademark, not actually registered. The name is associated with a variety of domestic products. Voche® isn't a manufacturer or a retail sales outlet; I think they're a wholesaler of rebranded generic products.
I suggest trying to identify the manufacturer in hope of getting sense out of them is a forlorn hope. The makers could be anywhere in the world, likely but not necessarily China. There are many firms able to produce generic products in any colour / brand / electrical standard / price range a wholesaler or retailer wants.
Makers in the plural because generic products are rarely made entirely in house. The power supply case is probably also generic, made by someone else, and fitted with electronics made by yet another third party. The goal is low cost rather than comprehensive customer support – what you get is in the manual, and there's no easy way of getting back to the original designer, who could be in the West and determined to stay anonymous. The same item can be made by several different makers.
I suspect the red LED comes on only to indicate the device is plugged in and the other LEDs aren't connected. They exist because the same case is used by other products, perhaps a posher version of the same drill. Cheaper to make one case with 3 LEDS and not bother to connect two of them. Might be wrong and the supply is faulty, but I think the only way to find out is open it up and have a look.
In the past brand and trade names were strongly associated with the actual maker, who was local. Not so today: domestic stuff is often made of generic parts manufactured wherever in the world is cheapest – production and distribution are both thoroughly international. Not easy for individual customers to trace origins, and not cheap for retailers to find out from their wholesaler, who might not know either.
Big cost savings are also achieved by altering what happens when a faulty product is bought. Instead of supporting the customer with technical support, full documentation and spares, faulty items are simply replaced or money back. When this is done the customer has little chance of finding anything useful out. To get technical support it's necessary to buy products that are expensive enough to be worth repairing.
Not a good thing in my view, but that's how it works. I don't think keeping prices down by making products disposable is sustainable, but it's how much manufacturing is done these days.
Dave
Edited By SillyOldDuffer on 28/01/2023 12:29:56