Waeco AirCon Service Center ASC 3300 G Notice D'utilisation page 130

Service tasks
If the actual ambient temperature is only 20 °C, the pressure on the scale
should only be approximately 4.7 bar. The measured pressure deviates
approximately 2 bar from the normal pressure.
The reason for this is usually that non-condensing gases (for example,
air) have entered the internal tank. This can happen, for example, during
service on a leaking air conditioner.
If the tank pressure deviates by more than 1 bar from the normal
pressure, the non-condensing gases must be discharged manually, as
otherwise proper operation of the device is no longer guaranteed.
!
CAUTION! Risk of injury
Wear protective gloves and goggles.
Wear hearing protection at pressures above 10 bar.
Ensure adequate ventilation.
Do not inhale escaping gases.
Keep the device away from ignition sources.
1. Take off the front panel:
Undo the screws (D) on the control panel and lift it up. Then undo the
screws (E) on the bottom of the front panel and take it off.
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AirCon Service Center
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