Grundfos SQ Flex F3 on CU 200

I'm helping a neighbor out with this.  I've done electrical engineering for around 40 years, but I'm just now becoming familiar with this system.

I can't easily get to his pump so I don't know the exact model number.  It was purchased to run off of about 300 watts of solar or generator and is delivering water from a tank fed from a spring up about 200' in elevation to a tank to gravity feed their house.  It has a CU 200 and IO (I forgot the IO box number, but it's not a 50).  It has been in operation for around ten years.

So today he noticed that his reservoir near his house was low and found the CU 200 says F3.  I measured around 63 volts from the solar panels in partial sun near the pump.  The pump is in a tank and difficult to get to, but that's what I measured at the underwater cable about ten feet away from the pump.  The voltage stays the same whether the pump is connected or not and I measure no current flowing.  There is no current flowing with the generator connected to the CU 200 instead of the solar panels either.

I ran 110 VAC to the pump, directly at the pump, bypassing the CU 200 and measure around .4 amps of current.  I haven't been able to get to the tank to see if it's actually pumping.  But I'd expect the pump to be able to use more current than this.

Am I missing anything?

Thanks!