Changes made for Pathfinder 5226 controllers.

The HPU system that is put on our retrofitted double folders has both a temperature feedback sensor and an air cooling fan. The controller has 3 parameters to control the cooler based on temperature. There is a threshold parameter which will turn on the fan when temp is above its setting and a maximum parameter which when temp reaches this setting it will throw an error and not let the user run the machine. Then there is a hysteresis parameter. Logic for this parameter is that if the cooler is on and it gets to threshold minus hysteresis turn off the cooler.

The bug for the max temp is that it was also turning off the cooler, but at max minus hysteresis. The hysteresis in this case is just supposed to keep the user from running until under max minus hysteresis, but keep the cooler on to keep cooling. This has been fixed.