Fault codes covered
85-14, 85-54
The VFD boosts line voltage and uses the PFC circuit to maintain DC voltage within an acceptable range. Code 85-14 is set when the DC voltage exceeds the acceptable upper limit of 410VDC. Exceeding maximum DC voltage can damage electrical circuits or shorten the VFD operating life. 4 occurrences within 1 hours result in 85-54 malfunction which has a 2 hour lockout time. An instance of 85-14 will result in VFD shutdown and system restart once 5 minute compressor protection timer expires. High AC line voltage or quickly unloading the compressor may result in a code 85-14. Manually power cycle outdoor unit with disconnect, if malfunction persists replace VFD.
Source: ACHPVSR454-02SM troubleshooting pages.