Fault codes covered
88-27
Code 88-27 indicates that an attempt to reprogram the VFD failed. If this diagnostic is not recent, then a subsequent reprogramming attempt may have succeeded. The technician should check the current VFD software version against the latest software release. If the VFD software is not the most current, then the VFD should be reprogrammed manually using the Infinity System Control or the Carrier Service Tech App.
Source: ACHPVSR454-02SM troubleshooting pages.