Bosch ACS 553-P - Vacuum Leak Test

ACS 553, ACS 563 Service Manual
1 689 975 295 2021-04-13 Robert Bosch GmbH
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Plumbing and Mechanical
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HS and LS inlet solenoids are activated to equalize high and low sides of system being serviced. Unit checks low-side
transducer for rise in vacuum. If the unit sees a pressure rise within 5 minutes time, the vacuum leak test will fail.
Temp. Sensor
Filter / Drier
Oil Inject
HS Inlet 2
LS Inlet 2
Vacuum
Solenoid
Valve
Recover
Solenoid
Valve
High Side
Service Hose
Vacuum Pump
Compressor
Internal
Tank
High
Pressure
Switch
High
Side
Gauge
Oil Drain
Bottle
Low Side
Service Hose
Oil Drain
Solenoid
valve
Manifold
Low Side
Press
Transducer
Pressure
Relief
(S11)
(S9)
(S8)
(COMP)
(PUMP)
(P1)
(M2)
Low
Side
Gauge
(M1)
(T2)
(T1)
Oil Inject
Bottle
Solenoid
valve
(S14)
(VU1)
(V2)
System Oil
Separator
(F2)
Tank
Check
Valve
(P3)
Service
Port
Oil Inject
Check Valve
(VU4)
Solenoid
valve
Solenoid
valve
Accum
Press
Transducer
(P2)
Air Purge
Solenoid
Valve
(S6)
Air
Diffuser
Contamination
Port
HS Inlet 1
Solenoid
Valve
(S5-1)
LS Inlet 1
Solenoid
Valve
(S4-1)
(S5-2)
(S4-2)
(T3)
(T4)
Tank Liquid
Solenoid
valve
(S7)
Recover Check
Valve
(VU3)
High Side
Flush
Low Side
Flush
Flush Port
Check Valve
(VU5)
Tank Liquid Check
Valve
(VU2)
Manifold
Oil
Return
Solenoid
Valve
(S13)