Contents Roof-top air-conditioning system CC8
II
4.10 Installation of roof-top unit with air ducting system or air distribution panel ......................................... 413
4.10.1 Air duct sealing .......................................................................................................................... 413
4.10.2 Working on the sealing frame.................................................................................................... 414
4.10.3 Mounting the base frame........................................................................................................... 415
4.10.4 Pre-assembly of air distribution panel ....................................................................................... 416
4.10.5 Installation of air distribution panel ............................................................................................ 417
4.10.6 Installation of air ducting system ............................................................................................... 417
4.11 Installation of compressor..................................................................................................................... 419
4.12 Make electrical connections.................................................................................................................. 420
4.13 Preparation and installation of refrigerant lines and condensation water hoses in the vehicle............. 421
4.14 System leak-testing and evacuation..................................................................................................... 422
4.14.1 General...................................................................................................................................... 422
4.14.2 Description of test gauges with fittings ...................................................................................... 422
4.14.3 Evacuation................................................................................................................................. 422
4.15 Filling the system with refrigerant ......................................................................................................... 423
4.15.1 General...................................................................................................................................... 423
4.15.2 Main filling.................................................................................................................................. 423
4.15.3 Leak-testing ............................................................................................................................... 423
4.15.4 Complementary filling ................................................................................................................ 424
4.16 Completion............................................................................................................................................ 424
5 Operating information
5.1 Safety precautions ................................................................................................................................ 501
5.2 System control...................................................................................................................................... 501
5.3 Controls and indicators......................................................................................................................... 502
5.4 First-time operation............................................................................................................................... 502
5.5 Operating instructions........................................................................................................................... 503
5.6 Operation of air-conditioning system (with room thermostat function and fresh air ventilation flap)..... 503
6 Maintenance
6.1 Safety precautions ................................................................................................................................ 601
6.2 General ................................................................................................................................................. 601
6.3 Maintenance and service...................................................................................................................... 601
6.4 Maintenance and service checklist....................................................................................................... 602
6.5 Inspections before repair ..................................................................................................................... 602
6.6 Troubleshooting.................................................................................................................................... 603
6.6.1 General...................................................................................................................................... 603
6.6.2 Electrical system........................................................................................................................ 603
6.6.3 Air-conditioning system ............................................................................................................. 603
6.6.4 Refrigerant circuit ....................................................................................................................... 604
6.6.5 Pressure testing......................................................................................................................... 604
6.7 Repairs.................................................................................................................................................. 604
6.8 Post-repair procedures and testing....................................................................................................... 605
6.8.1 Check refrigerant pressures and pressure switches function tests ........................................... 605
6.8.2 Replenishing partially filled systems with refrigerant................................................................. 606
6.9 Visual inspection................................................................................................................................... 606
7 Circuit diagrams 701
8 Torque values for some spare parts........................................................................................................... 801
9 Warranty claims 901