Being that split-system heat pump water heaters are a more rare type of system, I would question what the software’s input for “Residential heat pump water heater location” is actually asking for/assuming. It is likely treating the heat pump water heater as a combined system and therefore assuming the compressor and storage tank are installed in the same location that you input into the software (which is not the case for the split-system heat pump). I don’t know if the software has a way to account for this. Would anyone from EnergySoft be able to comment on this?
Since this error comes straight from the CEC’s calculation engine, I would recommend that you reach out the CBECC res and try and describe what is going on and the error you are receiving. If you get an answer, I’m sure everyone would appreciate it if you shared it here.
Here is the email for the CBECC res support team.