Introduction
Checking the compressor pressure and refilling it with coolant is essential to ensure optimum performance of the temperature management system. It can be done as part of scheduled servicing or as a troubleshooting exercise.
The coolant in the compressor is a common refrigerant gas - R134a (1,1,1,2-Tetrafluoroethane). The gas must be purchased locally because Aeroqual cannot ship gas.
To understand how often you should perform this service activity, click here.
Tools
No tools specified.
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Enter service mode so any fluctuations in the data caused from this activity can be excluded from air quality reports.
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Open the door to the monitor and leave the door open during this process.
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Find the internal temperature sensor which is plugged into the side wall of the TMS module.
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Unplug the temperature sensor and replace it with the temporary plug.
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Leave the temporary plug in for the rest of this procedure.
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Unscrew the protective cap from the gas inlet, and put in a safe place because you will need to put it back on later.
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Remove the charging cap from the end of the pressure gauge.
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Screw the charging cap from the pressure gauge on to the gas inlet on the compressor.
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Attach the pressure gauge by pushing it into the fitting on the compressor inlet.
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Wait 5 minutes for the gauge to stabilize before continuing with the next step.
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Attach one end of the charging hose to the pressure gauge and the other end to the can or cylinder of R134a.
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Your target pressure depends on the current temperature of the room or environment where you are performing this exercise.
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Find out the current ambient temperature, then use the following table to identify your target pressure in PSI.
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The pressure variation is only a few PSI. It’s important to try to achieve the target pressure point.
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Gently open the valve of your can or cylinder and watch the pressure gauge increase until just over your desired set point.
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Shut the valve and wait 3 to 5 minutes for the pressure to stabilize.
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If the needle drops below your target pressure, repeat the process, each time only letting in a small amount of gas and waiting for the needle to stabilize.
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Unscrew the connection to the valve.
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Use a pen to press in the valve pin for 2 seconds.
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Wait 2 to 3 minutes for the pressure to stabilize.
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Repeat the process until the pressure reaches the target level.
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Gently detach the valve connection.
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Screw the protection cap back on.
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Replug the internal temperature sensor into the side wall of the TMS module.
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For further support, contact Technical Support.
For further support, contact Technical Support.