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What would cause and INF on the ATS48?

Issue:
What would cause the InF fault on the ATS48?

Product line:  
Altistart 48, ATS48

Environment:  
All models, all serial number

Cause:
InF displayed on the unit. 

Resolution:
This fault appears if the control board cannot determine the soft starts power rating from the information stored in the EEPROM memory chip on the power board. 

Possible causes are:
- Poor internal connections on the control card.  Try remove the control card, check the plugs and pins.  Reseat the control card back in place.  

- The 24VDC is saturated.  Remove all connections to +24 terminal and then measure the voltage. 

- If another ATS48 unit is available, try swapping control boards to confirm if the issue stays with the board or the soft start. 

- Power rating not recognized.  Replace the Power board and/or Control board.
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