Mars Comfort-Aire Century VCD-SA Series Service Manual page 26

Service Manual - VCDxxSA
10.1 Micro-Switch Introduce:
A For ALARM terminal port CN33
1. Provide the terminal port to connect ALARM, but no voltage of the terminal port , the power from
the ALARM system (not from the unit )
2. Although design voltage can support higher voltage ,but we strongly ask you connect the power
less than 24V, current less than 0.5A
3. When the unit occurs the problem , the relay would be closed , then ALARM works