Vacuum Phase - Bosch ACS 810 Repair Instructions

en | 14 | ACS 810 | Service phases
8.3

Vacuum phase

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During vacuum generation in the vehicle air
conditioning system, the refrigerant is prepared
in the internal refrigerant cylinder to remove the
non-condensing gases before filling and to filter the
refrigerant.
1. The ACS 810 is connected to the vehicle with the
service hoses T1 and T2.
2. Open the service quick-release coupling valves.
 The pressure on the high and low pressure side
of the vehicle air conditioning system is indicat-
ed on the pressure gages M1 and M2.
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Opening the HP and LP valves on the ACS 810
causes the refrigerant to flow to the pressure
sensor P1 (solenoid valves EV1, EV3, and EV10
are closed). P1 checks the pressure in the vehicle
air conditioning system (refrigerant present in the
vehicle air conditioning system or not).
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If the pressure in the vehicle air conditioning
system is below the set value, the vehicle air
conditioning system is empty and the ACS 810
starts vacuum generation.
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If the pressure is above the set value, there is still
refrigerant in the vehicle air conditioning system,
and it must be extracted before vacuum generation.
3. Press the <Vacuum> key.
 EV1 and EV10 are opened
 The vacuum pump (2) starts.
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The vacuum pump generates a maximum vacuum
of 0,033 mbar. This depends on the duration of
vacuum generation.
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The refrigerant in the internal refrigerant cylinder
is fed through the internal refrigerant circuit and
prepared in each vacuum phase.
Robert Bosch GmbH