Fault codes covered
82-16, 82-56
The VFD monitors line voltage and will set code 82-16 if line voltage drops below 180VAC peak. When code 82-16 occurs the system will shut down and reset VFD. System will attempt to resume operation once 5 minute compressor protection timer expires. 4 occurrences of code 82-16 in a 1 hour period will result in code 82-56 and will shut down equipment for a 2 hour lockout. Measure input voltage with a power quality analyzer and contact power utility provider if necessary.
Source: ACHPVSR454-02SM troubleshooting pages.