FORM NO. 56043123 - SR 1900 -
19
WARNING!
High-pressure side air conditioning components,
fi
ttings, lines and hoses can be extremely hot after operation and can cause severe
burns. Always use the appropriate precautions when working around the Binary Pressure Switch, Receiver/Dryer or other A/C
components.
BINARY PRESSURE SWITCH (S34)
Refer to Figure 5-3.
Note:
The Binary Pressure Switch is mounted to the top of the A/C Receiver/Dryer at the rear of the machine.
Open the rear Cover Assembly.
1.
Remove the electrical connector from the Binary Pressure Switch and check for continuity across the two terminals.
2.
Note:
The Binary Pressure Switch is normally closed and should have continuity across the terminals if the A/C system is charged adequately and is at normal
ambient temperature.
If there is continuity across the terminals, the Binary Pressure Switch is working correctly.
If there is very high resistance or no continuity across the terminals, replace the Binary Pressure Switch.
FIGURE 5-3 – Checking Continuity through the Binary Pressure Switch
Binary Pressure
Switch (S34)
A/C Receiver/Dryer