What are the two lines of water pressure switch?
Four-wire pressure switch works are the same, about two high and low pressure switch, the upper and lower pressure switch; for example, the pressure at higher than 3.4 or below 0.196 disconnect the compressor
Pressure higher than 1.7 when the pressure switch action, so that the condenser cooling fan high-speed operation. There are two lines are high and low voltage switch line, and then the root is the medium voltage switch line, above two are FireWire,
High and low switches can be used directly with the line, the same pressure switch .....
4 feet and 3 feet for the high voltage switch, 2 feet and 1 feet for the low voltage switch. Low-voltage switch control air conditioning pump work or not, and high-voltage switch is to control the high-speed fan. Please refer to the 2 valve and 5 valve air conditioning system circuit diagram.
No. 1 No. -2 normal is through the high and low disconnected 3 - 4 pass control fan high-speed relay pressure switch four lines in the open air-conditioning switch, there are two are electric (4 feet and 2 feet) , As normal.
