Karcher WV2 Window Washer: LED Blinks 4 Times, Won't Charge & How to Remove Bottom Case

Hello, the washer does not turn on, after pressing the switch the LED blinks 4 times and nothing happens. Charging attempts do not work, the charger is working.
Second thing, I can't take the bottom case off, how to take it off ?

Hello, a typical damage is rust on the engine shaft - the washer must be disassembled between the turbine and the slnik, spray WD with it, remove the rust from the engine shaft. Manually turn the turbine, you will feel resistance at first, make a few turns again and spray WD again in the indicated place. The lower part is mounted on latches, they can be released, for example, with a screwdriver.

Thanks for the answer, these latches are these holes from the bottom? because I tried but nothing slows down?

Not those holes, the latches are between yellow and black .

I opened it, the motor twitches and stands after pressing the button. The rotor moves slightly as if I twist my finger, but unfortunately there are stains and stains on the board, i.e. electronics fault? can it be fixed?

What is the battery voltage? Clean the electronics with a nitro solvent.

3.47V has, ok it will wash in a moment, I have a spray to electronics, I washed the car's flow meter with it.

Added after 19 [minutes]:

Unfortunately, I washed it thoroughly and nothing After pressing the switch, the current does not go to the motor, the meter shows 0.00V on the wires at the motor.

The rechargeable battery is not charged, the rated voltage is 3.7V after charging 4.2V, the battery may have run out.

Added after 9 [minutes]:

Check the charger if there is voltage at the outlet of the plug, connect the charger to the washer's socket and measure whether the charger is charging the battery, if it is charging, wait until the voltage on the battery increases to at least 3.7V then turn on the washer. At a voltage of 3.4V, the electronics will not turn on the power to the motor.

The charger works on a 5.5V power supply, and where should you check this charging?

The electronics with a voltage of 3.4V will not turn on the power to the motor, it is set in such a way to protect the battery against complete discharge.

And where to measure or charge?

On the battery.

Before charging, the battery was 3.38V. For 50min. charging, the battery still has 3.38V. So something with the charging system? but the rechargeable battery? I removed the battery and measured the current on the battery contacts without a battery with a charger connection and it is only 0.28 V

You can finish off the electronics with such methods.

Ok, I will not be up to anything. What would you advise now if it is not loading?

You made a mistake by connecting the charger to the electronics without a battery. The electronics is normally powered by 3.7V (4.2V after fully charging the battery). The charger, as you write, gives 5.5V, think about what could have happened when the supply voltage was exceeded.
My suggestion is - if you have a 3.7V stabilized power supply and 3A current, connect this power supply in place of the battery, do not confuse + with - check if the engine starts, if so, the washer is operational and you need to take care of the charger.

Unfortunately, I do not have such a power supply, I will buy a rechargeable battery tomorrow

, I will mount it and see if it is charging, because the charger is 100% functional because I borrowed a second one from my friends, where they charge the same washer. And after inserting the battery, it is still a motor shake, the symptoms are the same, maybe nothing happened because of my stupidity

These washers are unfortunately crap. I had a similar problem in the last week of my warranty. The service has qualified the washer for replacement with a new one. According to an authorized Karcher service technician, these washers do not last longer than a year after the warranty.

They do not stand the warranty, let alone after the warranty to work.

Hello again, will this link be good:
Li-Ion SONY US18650V3 3.6V 2250mAh 10A, is 10A too much?

leszekppp wrote:

is 10A too much?

10A is the maximum current that can be safely drawn from the cell. This does not mean that this current will continue to flow in the circuit. It is very likely that the motor consumes much less current than 10A, so such a cell will work in comfortable conditions.

Thanks for the answer.

leszekppp wrote:

I will mount it and see if it is charging, because the charger is 100% efficient because I borrowed a second one from my friends, where they charge the same washer.

I have dealt with a similar device and it is not a charger, but the power supply itself, it is electronics on the PCB that decides about charging, also the "electronics" itself may not supply current to the cell.

Hello again, I have finally installed the link and the washer works, but it does not charge the battery, where to look for the reason? The LED on the switch blinks 2 times and goes out.

Karcher released total crap. Today I got such a treat from a friend. I personally own the Leifheit companies and there is no question of flooding the plate there. There is practically no such possibility, because if some water gets on the rotor, it has windows where it will throw the water, and the whole thing looks more solid and tight 1000x (I did not take it apart, but under the rotor next to the housing there are also some metal plates) - the lack of topics about the site on the forum says it all. The one that got Karcher flooded - the rotor and a hole under it like a finger, where water can flow. The electronics housing under the rotor has some kind of grooves for draining water - LOL. The motor has a lot of white sediment on the housing and the plate in 1 place when connecting the switch cable. The battery or the protection was internal or the flooding and the short circuit completely discharged, because there is 0V on it. I replaced the battery with a lap battery. Fortunately, nothing left the electronics, because the charging started immediately and it works - by the way, the engine is loud as a drill. In Lefheit it works rather more humanly. Just Karcher = crap.

fredo110
Why would it release electronics when plugged in without a battery? It is not electronics from the battery in the lid that it locks up, etc. as it does not detect voltage. There are only 3 melds here, probably the cheapest crap (I wrote below). I connected the charger without a battery and measured it in the same way - it does not give voltage to the pins. Only after connecting the battery, it detects and starts charging - green LED. The power switch does not work while charging. It needs to be recharged and only starts after disconnecting the charger. As simple as building a flail. I also have a battery replacement and everything.

leszekppp
It would be necessary to check what the system is there, the catalog note, what to measure and where to do it. + you can check the transistors and diodes on the board earlier, because there are several of them there. Maybe something has fallen with you, the system detects it and signals it with an error - which in itself is good information, because the main circuit is probably alive ... and I checked it and the atmel1413 procek The other two are the regulator (something like a zener) t431b and some mosfet ior p315h. Both in SOIC kennels. I would check these systems for the start.

I bought a Li-Po charger module on the TP4056 chip, soldered and the washer works and charges.