Questin - York YPAL090H

[heyguy]

I have a YPAL090H, 90 Ton RTU. During warmer days, but not limited to them, I receive daily system safety lockout faults and shuts down the compressors stages.

Please, can someone explain what safety lockout faults that are tripping the unit off and why.

I know that there needs to be 3 trips for this to occur. Thank you in advance.

Eric

[heaviwall]

could you give more detail this unit has amicro panel or does it have to be acessed thru ahandheld programmer is it airside related?

[heyguy]

thank you heaviwall:

It has a micro panel at the unit, i'm not sure what airside related is.

If it is airflow, i am receiving from both OA & RA dampers.

Is there something that I should look at at the micro panel?

Thanks again.