Does anyone know what the A2 error code means on Friedrich PTAC units? We have over 700 units and these happen every once in awhile. The manual doesn't show this code, Google isn't coming up with anything, Friedrich hasn't responded to my email over a week ago.
If we reset the units, they start operating normally.
If we reset the units, they start operating normally.
source https://hvac-talk.com/vbb/threads/2237774-Friedrich-PTAC-error-code-A2?goto=newpost
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