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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Solar Sensor: Testing and Inspection

PHOTO SENSOR

INSPECTION
With the fully automatic air conditioning operating (during summer in daylight), cover the light-sensitive part of the photo sensor with the hand - if the blower speed drops, it is normal. If it does not drop, replace the photo sensor.