9.3.1 Replacing the VN2020 / VN2020 EX measuring head ........................................................... 139
9.3.2 Replacing the fuse on the VN2020 / VN2020 EX measuring head ........................................ 145
9.3.3 Replacing the seal on the inspection cover ............................................................................ 147
9.3.4 Replacing the seal on the mounting plate ............................................................................... 147
9.3.5 Replacing the inspection cover screw plug ............................................................................. 148
9.3.6 Replacing the terminal box on the VN2020 / VN2020 EX ...................................................... 150
9.3.7 Replacing the filter control valve on the VN2020 / VN2020 EX .............................................. 156
9.3.8 Replacing the connecting hose on the VN2020 / VN2020 EX ................................................ 160
9.4 Repair by Schaller Automation ............................................................................................... 163
9.5 Taking out of service and disassembly ................................................................................... 163
9.6 Starting up again ..................................................................................................................... 163
10 Error diagnosis and troubleshooting .................................................................................. 164
10.1 Behaviour of the oil mist detector in the event of a fault ......................................................... 164
10.1.1 Defect in the measuring head ................................................................................................. 165
10.2 Error diagnosis and troubleshooting ....................................................................................... 166
10.2.1 Error diagnosis ........................................................................................................................ 166
10.2.2 Troubleshooting ...................................................................................................................... 167
11 Final shutdown and disposal ............................................................................................... 169
11.1 Disposal .................................................................................................................................. 169
11.2 Final shutdown ........................................................................................................................ 169
12 Contact ................................................................................................................................... 170
13 Spare parts for VN2020 / VN2020 EX ................................................................................... 171
13.1 Spare parts list VN2020 .......................................................................................................... 171
13.2 Spare parts list VN2020 EX .................................................................................................... 173
13.3 Maintenance kit (4,000 / 8,000 / 12,000 hours) ...................................................................... 175
13.4 Cleaning kit ............................................................................................................................. 176
13.5 Service kit for VN2020 (16,000 hours / 24 months) ................................................................ 177
14 Accessories for VN2020 / VN2020 EX ................................................................................. 179
15 List of figures ........................................................................................................................ 182
16 List of tables .......................................................................................................................... 184
17 Glossary ................................................................................................................................. 185
18 EC Declaration of Conformity .............................................................................................. 186
19 Attachments .......................................................................................................................... 188
19.1 Description of error on the VN2020 / VN2020 EX oil mist detector ........................................ 188
20 Notes ...................................................................................................................................... 191
21 Index ....................................................................................................................................... 192
22 Customer information ........................................................................................................... 193