We have a Yale mpb040-en24t2748 24V electric pallet jack that gives me an error whenever I connect it to the charger. It initially goes through the 3 LED test pattern and then the solid yellow LED comes on, as if it is charging.
About 30 seconds later the red LED starts blinking, although the yellow LED remains on. According to the troubleshooting guide on the top door of the jack, this means that there is no current output.
I have verified that all 4 of the batteries have the proper water level and the electrolite reading in several cells that I tested is within normal range. The batteries are less than 1.5 years old.
The system is showing 24V at the plug to the motor. Do I have a bad charger or is there anything else I can check?
I know it is not supposed to charge if the system is already showing 24V but I would not think an error would appear. When I was originally alerted to a problem with the jack the entire system was only reading 3.1V. I had to do a bit of temporary rewiring and connect a 12V car charger to recharge two batteries at a time to get the system back up to 24V.
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We are experiencing the same problem with the same model number of electric Jack, however, having a very hard time sourcing an alternate battery charger since ours is so outdated. Any suggestions?
Thank you for your quick reply. Based on your troubleshooting suggestions I've determined that the charger is defective.
The power at the main plug to the motor reads 24.07V. When I plug in the charger it goes through its initial LED sequence and the solid yellow LED comes on, indicating that it is charging. The red LED starts flashing around 30 seconds later. The 24.07V readout never changes.
I will look for a compatible replacement charger. This Moran brand charger is apparently obsolete and no one sells them anymore. Several places want just as much to repair it as I can probably find a new replacement for or even less. Thanks again for your help.
First off, 24 volts open circuit is a dead battery. 25.1 is a charged battery. If you have a volt meter, hook it up across the main connector. Watch the voltage after you plug in the charger. After the charger goes through the start up sequence see if the voltage rises. If the voltage rises and the charger kicks out note the voltage when the kick out occurred. If the voltage rises too quickly it is an indication of a shorted battery. If you get no voltage rise you have a charger problem.
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