Service Phases; Recovery - Bosch ACS 810 Repair Instructions

8.

Service phases

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This section describes all of the ACS 810 service
phases. In addition, it explains the hydraulic
and electric circuits by presenting the hydraulic
diagram and providing a brief description of the
components involved in each function.
8.1

Recovery

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In this service phase, the refrigerant is extracted
from the vehicle air conditioning system.
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 solenoid valves
EV10 (open) and EV3 (closed).
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The pressure sensor P1 checks the pressure of the
vehicle air conditioning system (whether or not
there is refrigerant in the vehicle air conditioning
system).
3. starts extraction of the refrigerant.
 The solenoid valves EV10, EV3 and EV5 are
opened and the compressor (6) is started.
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The refrigerant flows through the solenoid valves
EV 10, EV3 and EV5, the mechanical filter (F1), the
expansion valve (3), and the condenser/separator
(4).
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The expansion valve maintains a constant pressure
at the evaporator/oil separator (4).
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In the evaporator/oil separator (4), the oil
extracted from the vehicle air conditioning system
is separated from the refrigerant and routed into
the used oil bottle.
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The refrigerant then flows on through the combo
filter (F2) and the compressor (6) into the
condenser/separator (5), and finally into the
internal refrigerant cylinder.
Robert Bosch GmbH
Service phases | ACS 810 | 11 |
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The combo filter (F2) cleans the extracted
refrigerant of suspended particles and moisture.
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In the evaporator/oil separator (5), the oil taken
in from the compressor is separated from the
refrigerant and fed back to the compressor.
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If the pressure at sensor P1 falls below the
value saved in the software, the function stops
automatically, the program waits 5 minutes for a
pressure increase and, if necessary, restarts with a
second recovery cycle.
At the end of this phase, the solenoid valves EV10,
EV3 and EV5 are closed and the compressor 6 is
turned off.
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