Club Car ERIC chargers with only a USB port and no button or display cannot be manually changed between pre-loaded algorithm #31 for OE Club Car Flooded and #188 for Trojan T875.
Use the below scripts to change the default algorithm between the two on these chargers only.
These files DO NOT ADD algorithms to the charger, only change between #31 and #188.
Downloads below. Follow the instructions here:
IC Series: How to reprogram, reflash or upgrade software and algorithms via USB