1 689 975 252 2019-05-15| Robert Bosch GmbH
2 | ACS 511 | en
en – Contents
1. Symbols used 3
1.1 In the documentation 3
1.1.1 Warning notices -
Structure and meaning 3
1.1.2 Symbols in this documentation 3
1.2 On the product 3
2. Important information 4
3. Test equipment and auxiliary materials 4
4. Safety regulations 5
4.1 Handling refrigerant R134a 5
4.2 Handling UV dye 5
4.3 Working on the vehicle 5
4.4 Notes on operation 6
4.5 Maintenance work 6
4.6 Safety devices 6
4.7 PED directive 2014/68/EU 6
5. Product description 7
5.1 Description of unit 7
5.1.1 Front view 7
5.1.2 Rear view 7
5.1.3 Display and control panel 8
5.1.4 Selection and function keys 8
5.1.5 Input keys 8
6. Program structure 9
6.1 Calibration and tare 9
6.2 Settings 9
6.3 Repair 9
6.4 Vehicle and customer data 9
6.5 Menu 9
6.6 Manual mode 9
6.7 Automatic mode 9
6.8 Flush (optional) 9
6.9 Enter 9
7. Hydraulics diagram 10
8. Service phases 11
8.1 Recovery 11
8.2 Draining oil into the used oil bottle 13
8.3 Vacuum phase and recycling
(simultaneous) 14
8.3.1 Vacuum phase 14
8.3.2 Recycle 14
8.4 Leak test 16
8.5 Refrigerant preparation 17
8.6 Fresh oil filling 18
8.7 UV contrast medium filling 19
8.8 Filling refrigerant 20
8.9 Separating and returning compressor oil 21
8.10 Non-condensing gases 22
9. Troubleshooting 23
9.1 Service messages 23
9.2 Fault messages 23
10. Emptying the ACS 511 24
10.1 Automatic emptying 24
10.2 Extraction of internal refrigerant circuit with sec-
ond A/C service unit 24
11. TROUBLESHOOTING AND ANALYSIS 25
11.1 Faults during recovery 25
11.1.1 Compressor starts 25
11.1.2 Compressor does not start 25
11.1.3 Fault messages that can occur during
recovery 26
11.1.4 Other fault messages 26
11.2 Faults during the vacuum phase 26
11.2.1 The vacuum pump starts 26
11.2.2 The vacuum pump does not start 26
11.2.3 Fault message that can occur during the
vacuum phase 27
11.3 Faults during refrigerant preparation 27
11.4 Non-condensing gases are not drained 27
11.5 Faults during filling with refrigerant 27
11.5.1 Vehicle air conditioning system cannot be
filled 27
11.5.2 Other fault messages 27
12. Component test and maintenance 28
12.1 Vacuum pump 28
12.2 Pressure sensor P1 28
12.3 Pressure switch P2 28
12.4 Expansion valve 28
12.5 Combo filter 29
12.5.1 Replacement of combo filter 29
12.5.2 Reset filter 29
12.6 Vacuum pump 30
12.6.1 Changing vacuum pump oil 30
12.6.2 Reset of oil change interval 30
13. Calibration 31
13.1 Internal refrigerant cylinder scales 31
13.2 Fresh oil bottle scales 31
13.4 Tara values 32
13.3 Used oil bottle scales 32
13.5 Pressure sensor 33
13.5.1 Checking the adjustment 33
13.5.2 Adjusting the pressure sensor 33
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