Fault codes covered
88-37
The VFD has internal temperature sensors to monitor critical power components and take action if operating temperatures cross thresholds that may shorten the VFDs operating life. If the PFCM temperature sensor fails it will no longer be capable of preventing the PFC circuit from operation above the safe reliable temperature threshold. If this fault is active, the VFD will continue to operate normally since the only way to correct this fault is to replace VFD.
Source: ACHPVSR454-02SM troubleshooting pages.