0 0 NORMAL OPERATIONS   MEASUREMENT MODE
1 1 NORMAL OPERATIONS   NON-MEASUREMENT MODE
2 2 SMALL RH
3 3 HUMIDITY ELEMENT IS WET
4 4 HUMIDITY ELEMENT CONTAMINATED
5 5 HEATER FAIL
6 6 HEATER FAIL AND WET/CONTAMINATED HUMIDITY ELEMENT
7 7 AT LEAST ONE OF THE INPUT PARAMETERS USED IN THE CALCULATION OF MIXING RATIO IS INVALID
8 8 NUMERIC ERROR
9 9 SENSOR NOT INSTALLED
63 63 MISSING VALUE
