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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 spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Electrical Diagrams




HVAC Schematics

Module Power, Ground, Serial Data and Blower Controls





Mode Controls





Temperature Controls





Temperature Sensors





A/C Compressor Controls





Auxiliary Blower Controls





Auxiliary Mode and Temperature Controls




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