Hope someone may be able to help. We have a York DH150S204DAA3 package unit that keeps locking out in cooling with an alarm code of 9. According to the code list this is showing an ignition board lock out.
Checked both compressors pressures 200 head 73 suction 10 degree SC, 8.1 RLA. First stage runs all the time with no problem, when second stage is energized it will run 8-10 minutes then the board will lock out with the 9 code.
We are thinking a bad board but just are looking for any other input.