[rohrmann]

Our rig came with the Progressive Dynamics PD4590 which is the 90 amp model. I would download the manual, if you don't have one, and follow the directions on checking your unit. You may have something loose or a bad fuse. There is a section in the manual that I've copied and pasted below that may help:

Do not replace the converter section unless the following checks have been performed:
1. Use an AC voltmeter to check for the proper voltage at the 120 VAC breaker that the converter is connected to. This
voltage should be between 105 and 130 volts.
2. Remove the reverse battery fuses and check the converter output from the CONVERTER GND to the CONVERTER POS
terminals on the DC board. This should be 13.6 VDC.
3. Check the Reverse Battery fuses . These fuses will only blow if the battery or DC output leads were connected in reverse,
even for a moment. If they are blown check the polarity of the battery connections before replacing them.
4. If the Converter output is not present and there is AC to the converter , the converter is defective.