Bosch ACS 653-P - Page 117

ACS 653, ACS 663 Service Manual
SP00D00624 2021-04-08Robert Bosch GmbH
117
Parts and Components
   Internal
manifold assembly that serves as the attachment
ports for the high- and low-side service hoses.
 Fitting used to reduce the
ow rate.
 Supplies main power to the
unit.
 Spring-loaded
safety valve to release pressure from internal
storage vessel if pressure exceeds 25 bar
(362 psi).
  Controls power to all
electrical components.
 Measures the amount
of refrigerant in the ISV being charged into or
recovered from the vehicle A/C system.
Used to view vacuum pump
oil level.
    Energized
to allow excessive air to escape from the ISV.
      
Energized during the PAG Oil Inject process to
allow A/C system oil to be replenished.
— Energized at
the end of the Recover process to drain oil.
Allows
an open pathway for refrigerant ow and vacuum
between the A/C system low side and the unit.
This solenoid is powered during the Recover,
Vacuum and Flush process.
Allows
an open pathway for refrigerant ow and vacuum
between the A/C system high side and the unit.
This solenoid is powered during the Recover,
Vacuum, and Leak Check process.
   
When energized, allows refrigerant from ISV
to enter high side of system being serviced.
   
When energized, allows refrigerant from ISV to
enter low side of system being serviced.
 When energized,
increases tank pressure to assist the charging
function.
    When
energized, allows a vacuum or deep recovery
to be pulled on the A/C system being serviced.
   When
energized, provides the primary pathway of
removing refrigerant from the system being
serviced. This solenoid is also powered during
the Flush process.
 When
energized, uses vacuum pump to perform deep
recovery of refrigerant from the system being
serviced.
    When
energized, it returns compressor oil from the
compressor oil separator to the compressor
and equalizes the pressure on the high and low
side of the compressor.
      
Energized during the POE Oil Inject process to
allow A/C system oil to be replenished.
Energized during
the UV dye Inject process to allow the UV dye
to enter in the A/C system.
  
Energized during the
refrigerant identier process, allows to analyse
the A/C system refrigerant.
   When
energized, allows refrigerant from ISV to enter
of system being serviced.
  Allows the unit to be turned
ON and OFF.