Service & TroubleshootingCâu 77 / 110
A contactor in an air-conditioning condenser performs what function?
a.Meters refrigerant
b.Switches line-voltage power to the compressor and fan when energized by the control circuit
c.Drains condensate
d.Adjusts blower speed
Giải thích
The contactor is an electrically operated switch whose coil is energized by the low-voltage control circuit, closing contacts that supply line voltage to the compressor and condenser fan. Pitted or welded contacts are a common failure. It is tested for coil continuity and contact condition.
Luyện miễn phí toàn bộ 110 câu hỏi — không cần đăng ký.
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