Uv Contrast Medium Filling - Bosch ACS 652 Repair Instruction

8.7

UV contrast medium filling

i
By default, individual service phases are linked to
other service phases as they are needed to fully per-
form the individual operation selected.
i
The vehicle air conditioning system is partly filled
with UV contrast medium to facilitate detection of
leaks in the event of damage to the vehicle air condi-
tioning system.
M2
EVHP1 EVHP2
T2
M1
T1
EVLP1 EVLP2
R2
R1
HOSE FLUSH MANIFOLD
P2
HP
F2
6
C
Name Description
1 Fresh oil tank
2 Vacuum pump
3 Expansion valve
4 Evaporator/oil separator
5 Compressor oil separator
6 Compressor
7 Internal refrigerant cylinder
8 Refrigerant cylinder scales
9 Used oil bottle
10 Heat exchanger
11 UV dye bottle
12 Fresh oil scales
13 Used oil scales
EV1 Vacuum solenoid valve
EV3 Flow solenoid valve
EV5 Recovery solenoid valve
EV6 Filling solenoid valve
Robert Bosch GmbH
EV10
P1
EV9
VU3
11
3
SERVICE PORT
VU2
5
4
10
EV7
9
13
Name Description
EV7 Oil drain solenoid valve
EV8 Oil injection solenoid valve
EV9 Contrast medium injection sole-
noid valve
EV10 Solenoid valve for separating
high and low pressure
EVHP1 High pressure solenoid valve
EVHP2 High pressure solenoid valve
EVLP1 Low pressure solenoid valve
EVLP2 Low pressure solenoid valve
F1 Coarse filter
F2 Combi filter
HP High pressure
LP LOw pressure
M1 Low pressure gage
M2 High pressure gage
M3 Internal refrigerant cylinder pres-
sure gage
Service phases | ACS 652 | 19
i
If "UV contrast medium filling" has been selected in
the service process, a defined quantity (time con-
trolled) entered is fed into the vehicle air condition-
ing system along with the refrigerant.
i
EVHP1, EVHP2 and EV9 opens and the UV contrast
medium (11) is fed into the vehicle air conditioning
system with the refrigerant.
EV3
EV5
EV8 EV1
2
VU1
P
1
12
F1
V5 V6
V1 V3
7
8
Name
P1
P2
R1
R2
T1
T2
V1
V2
V3
V4
V5
V6
VU1
VU2
VU3
EV6
M3
V4 V2
Description
Pressure sensor
Pressure switch
Low pressure flushing connection
High pressure flushing connection
Low pressure hose
High pressure hose
Tank vapour side hose valve
Tank liquid side hose valve
Tank vapour side valve
Tank liquid side valve
Safety valve
Non condensable drain valve
Oil non-return valve
One-way valve
UV contrast medium non-return
valve
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1 689 975 257 2019-05-15
en