2012 Waterfurnace Legend Upon arrival, system was in the off mode. Inspection of unit showed that there were stored High Pressure and Low Pressure codes. Initial test run of the unit showed that blower motor was not coming in with a callcfor first stage cooling. Using ecm motor tester, found that speed 1 on blower motor no longer operates but speeds 2-5 do. Switch first stage heating/cooling blower speed to speed 2 and test ran cooling operation. Blower motor and flow center come on as they should, along with the compressor. Tested ground loop pressure and found to be at 15psi incoming, and 10psi outgoing. Pressures should be closer to 40-70psi for proper and most efficient operating parameters. Air temperature drop is at 17F. This is within the 17-22F specifications, although, the original fan motor speed should put it closer to the middle of the range, allowing for better dehumidification in the summer time. It is recommended to pressurize the ground loop to more appropriate pressure
