Fault codes covered
82-15, 82-55
Code 82-55 VFD Lockout – Fault with Power Drop
This code indicates the VFD has shutdown due to a line voltage loss. When this code is set the PCM will reset the VFD, and restart if demand is still present. The system should resume operation after 5 minute compressor protection time delay expires. 4 occurrences of code 82-15 within a 1 hour period will result in a code 82-55 and 2 hour lockout. Occasional occurrences of this code may happen due to momentary
power loss or electrical noise from utility. This code can be paired with other codes if electrical noise is present. Check tightness of all line voltage connections. Loose connections can cause momentary voltage drop due to vibration and trigger this fault. If all connections are tight, additional steps involving the local power utility or addition of external power conditioner may be required.
Source: ACHPVSR454-02SM troubleshooting pages.