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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Ambient Temperature Sensor / Switch HVAC: Description and Operation

A.Q.S(Air quality control system)
A.Q.S sensor is located at center support in front of the engine radiator, and detect hazardous elements in ambient air providing output signal to control. It will detect sulfurous acid gas. carbon dioxide, carbon monoxide, hydrocarbon allergen.