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)

Or, hide this message: temporarily or permanently

Initial Inspection and Diagnostic Overview

To diagnose the Electronic Climate Control (ECC) in the shortest time and with the least effort,it is important to know how a properly functioning system will perform. An ECC System Performance Chart is listed for reference and comparative purposes. A System Response and Function Test Chart are also shown.