Converter problems

[Myrnalh]

Our converter is not charging to battery on our zinger ZT-280-BH. We tried locating fuses on the converter but don’t see any. There are 2 orange fuses on the fuse panel that are testing as fine. Is there another place to find the fuses for the converter? Battery is only a few years old but could it be a bad battery? Fan is not moving on converter but all fuses that we can see are fine. We pulled out converter and didn’t see fuses on it.

[Wingerdinger]

I think every RV owner should have a multi-meter, and learn how to use it to check the health of their 12 volt systems. They all need some degree of maintenance at some point, and your meter will help you decide what to do.
You should check to see in fact that the convertor is working by checking the voltage across the battery posts. When you are on shore power, you should have over 13 volts. After you've been plugged in a few hours, unplug the RV and disconnect a terminal on the battery (negative is safer). You should have well over 12 volts across the terminals. If you don't, you have a bad battery. If you have the original battery, after two years you may need a new one.
On many Convertors, the charger portion has two fuses right on the charger enclosure itself, to protect it from reverse polarity. You have to remove the convertor cover to access them.