Fault codes covered
35-11, 35-58
Code 35-11 occurs when the high compression boundary is crossed and AEM cannot adjust system operation to reduce compression ratio. For each occurrence of 35-11, 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 the high compression boundary is crossed, code 35-58 will occur and shut down system for 2 hours. High compression ratio can be the result of overcharge or coil blockage/loss of airflow across heat exchanger.
Source: ACHPVSR454-02SM troubleshooting pages.