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WOW! Coolius 2700BT
10 Connecting and testing the A/C system
Use the service hose quick couplers to connect the hoses to the A/C system service ports, bearing in mind that
BLUE must be connected to the low-pressure (suction) side and RED to high pressure (discharge) side.
If the system is equipped with a single service port, connect only the relative hose.
Note: Before connecting the quick couplers, clean the a/c ports of any foreign material (grease or dust).
Winding the quick coupler hand wheel clockwise, will allow the refrigerant to flow through the hoses. Turning
hand wheel in opposite direction, the flow will be closed. If there is any refrigerant in the air-conditioning
system, the pressure displays will indicate a pressure.
The unit digital displays (suction & discharge) are important and important instruments.
The digital displays indicate the working pressure of the suction and the discharge side of the A/C system. The
pressures are displayed in Metric or Imperial system depended of the user selection.
The operator should have basic understanding between gauge reading and air-conditioning system normal
operating pressures, in order to correctly diagnose any possible system malfunction.
Above the digital displays is a bar graph which gives an estimation of good, fair or bad working pressures of
the A/C system. The black segment on the bar graph is related with the working pressure readings. The bar
graph colour coding is only indication.
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