I have 2 x chargers with a problem. Charger 1- I plug in the charger, the slow flashing red light comes on as per normal, then I plug in the battery, and within a few seconds, the light goes off. The charger does not charge at all, and the fan noise does not come on either. Charger 2- I plug the charger in and turn on power, the red light comes on and flashes fast with no battery in it. If i put the battery in, it just keeps flashing fast. It does not charge. I am disappointed with this Hitachi product, as I have paid for one of the most expensive drill and impact drivers there is on the market, and 2 x chargers have stopped working. Can anybody please help me solve my challenge here?
Opening the chargers up is NOT safe as there is a very high voltage (~400VDC) deadly!!! even with the power off and disconnected. Take it to an electronic service place, they should be able to check it for you. (Charger 2) Sound like you have a "load" on your output connection. The load is usually supposed to be the battery but it is detecting what it thinks is a bad battery. You may have a dodgy component on your board or some dust that is "loading" the battery detection circuit. Maybe a good clean out will resurrect it. (Charger 1) could be the feedback circuit to control the FET. Again, maybe a good clean out could bring it back to life. Hope it helps.
The various rates of flashing are error indicator codes and should be explained on the charger case. They are for the condition of the battery's though and not the charger. It sounds like the charger itself is bad. Can you return it for a replacement? Is it still in Warranty? For whats its worth, I went from Milwaukee tools to Bosch to De Walt before being satisfied with performance. I hope this helps.
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