Well that means to me if your voltmeter connections were correct that the 22 vdc coming into the battery charger PC board would appear to be somewhat normal so the transformer module seems to be working OK. However the 9.4 to 11.5 vdc coming out of the charger board is way too low to cause any charge to your batteries. Also if there was any significant battery charging current coming out of the charger board, that LED indicator light as shown in the schematic on page 20 of the manual would be illuminated which it isn’t. My conclusion again is that the charger PC board is toast.
