This morning I installed a new cooling
fan in my Victron and am happy to
report that the charger now charges as expected. I am embarrassed at how long it took me to recognize the real problem, though.
out the obvious before trouble shooting issues that were never a
2. To test the fan, disconnect J3 or J4 from the main control board. That
trips the overtemperature circuitry which energizes the "temperature" LED
and starts the fan.
3. The over temperature indicator works only in inverter
mode. A built in
circuit depowers the unit when it overheats in charge mode. (This
was my original problem.)
4. The temperature sensor can be disconnected from the control board by pulling the terminal block off its posts without releasing the set screws holding the wires in.
5. Replacing the fan was relatively simple even though it required
removing both circuit boards from the case to reach it. Anyone with
moderately decent mechanical skills can do it.
Thanks to all of you for your support and advice.
Now back to buffing and waxing.