Vacuum Leak Test - Bosch ACS 553 Service Manual

Plumbing and Mechanical
Manifold
Service
Port
Recover Check
(T4)
Valve
(VU3)
Manifold
Flush Port
Check Valve
(VU5)
High Side
Low Side
Flush
Flush
VACUUM LEAK TEST PROCESS
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.
1 689 975 295 2021-04-13
Accum
Press
(P2)
Transducer
System Oil
Separator
Oil Drain
Solenoid
Filter / Drier
valve
(F2)
(S8)
Oil Drain
Bottle
Vacuum Pump
(PUMP)
Recover
Solenoid
Valve
(S11) Oil Inject
Solenoid
valve
(S14)
Oil Inject
Check Valve
(VU4)
Oil Inject
Bottle
Figure 4-11. Vacuum Leak Test
ACS 553, ACS 563 Service Manual
Tank
Check
Valve (VU1)
(P3)
High
Pressure
Switch
Oil
Return
Solenoid
Valve
(S13)
Compressor
(COMP)
Low Side
Press
Transducer
(P1)
Vacuum
Solenoid
Valve
(S9)
HS Inlet 2
Solenoid
valve
(S5-2)
HS Inlet 1
Solenoid
Valve
(S5-1)
High Low
Side Side
Gauge Gauge
(M2) (M1)
Low Side
High Side
Service Hose
Service Hose
(T1)
(T2)
86
Pressure
Air Purge
Relief
Solenoid
(V2)
Valve
Air
Diffuser
(S6)
Temp. Sensor
Internal
Tank
Tank Liquid
Solenoid
valve
(S7)
Tank Liquid Check
Valve
(VU2)
LS Inlet 2
Solenoid
valve
(S4-2)
LS Inlet 1
Solenoid
Valve
(S4-1)
Contamination
Port
(T3)
Robert Bosch GmbH