Displaying & Reading Trouble Codes

If a system fault is detected, the LED indicator above the mode button depressed on the control head will flash for one minute. Diagnostic Trouble Codes (DTCs) will then be stored. DTCs are only stored when a system fault is present. History DTC(s) cannot be set except for DTC 09 (Low Freon).

To enter the diagnostic mode, push and hold the fan up" arrow and fan "down" arrow at the same time for approximately 5 seconds.

The LCD (Liquid Crystal Display) will show "-00." Push "AUTO FAN" and the LCD will show any fault DTC(s) stored in the programmer.

To exit diagnostics, change to a different electronic automatic air conditioning system mode.