Reading and Clearing Diagnostic Trouble Codes

If a system fault is detected, the LED of the operating mode the system is in at the time of fault detection will flash at a rate of 60 times per minute. Fault codes will then be stored.

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" and LCD will show any fault codes stored in programmer.

ECC Parameters:

While in diagnostic mode, it is possible to check several different system parameters (circuits or systems). This is done by pressing the fan "up" or fan "down" button. Once the parameter to be checked has been chosen, the fan "AUTO" button is pressed and a diagnostic value is displayed on the LCD. A list of system parameters and their normal operating ranges can be found in the illustration.

For further diagnosis of ECC system codes, refer to the diagnostic charts. To exit diagnostics, change to different ECC system mode.