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.