Fault codes covered
34-11, 34-58
Code 34-11 will be set when discharge temperature exceeds 235°F measured near the compressor. Low charge or very high superheat are contributors to this fault condition. For each occurrence of 34-11, the next startup will operate at a 25% reduction in capacity. Each hour of operation without additional faults will allow system to increase available capacity by 25%. Once the system is running at minimum capacity and discharge temperature exceeds 235°F, code 34-58 will occur and shut down system for 2 hours.
Source: ACHPVSR454-02SM troubleshooting pages.