Manuals through 2025 now available!
Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.
LEMON is the logical successor to CHARM, I recommend you try it!
Link:
lemon-manuals.la
A/C Signal: Description and Operation
The A/C request circuit signals the
VCM when an A/C mode is selected at the A/C control head. The VCM uses this information in order to enable the A/C compressor clutch and to adjust the
idle speed before turning ON the A/C clutch. If this signal is not available to the VCM, the A/C compressor will be inoperative.