Will not charge; lights flashing - Technical Troubleshooting discussion in Forkliftaction's forums

Hyster W40Z:
Will not charge; lights flashing

We have had our W40Z (B218) pallet jack for about 8 years. The batteries were replaced 4 years ago and until now we haven't had any issues.

All of a sudden the charger stopped working. Instead of going into the charger sequence as per usual, the green CHARGED light flashes ~15 times followed by the red DETECTION and POWERED lights flashing once simultaneously. The sequence then repeats itself. We've cleaned and checked all the cables and terminals. Our battery tester reads "LO" on each battery. Jack moves and lifts normally.

We thought to check the fuses in the charger, but neither of us has much electrical experience and don't want to open it up if we can avoid it. Any suggestions short of calling in a tech?

Thank you,

Jay Mack

Posted 10 Apr 2020 00:32
Discussion started by JMack
Texas, United States

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By your description you are saying the LED 1 flashes 15 times, then LED's 3 and 5 flash once?
This could possibly be this problem:
Battery Testing Error - Sulphate / Discharged: This error is only generated by one of two conditions found during the Pre-Qualification-Test Charge Stage: o Sulphate: Severely Sulphate battery plates are preventing a charge flow from increasing above a minimum value. Disconnect and reconnect AC Power to charger to restart this stage. If a second attempt failed, load test each battery and replace any failed battery. o Discharged: A severely discharged battery did not charge up to 1.75Vdc per cell ( for example - 21Vdc for 24V-battery ), within an allotted time span of approximately 4 to 8 hours. Check for heavy loads preventing battery from increasing charge and/or defective batteries that will not accept a charge.

Posted 10 Apr 2020 01:04
Reply by swoop223
North Carolina, United States

You've been swooped!
swoop223@gmail.com

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