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Contents
9.6 Adjusting the blade angle....................... 25
10 Operation .................................................... 25
10.1 Safety information................................ 25
10.2 Preconditions ...................................... 25
10.3 Speed-controlled fan operation ............... 25
11 Troubleshooting/maintenance/repair ................ 25
11.1 Safety information................................ 25
11.2 Troubleshooting................................... 26
11.3 Maintenance....................................... 26
11.3.1 Variable-speed fans.................. 27
11.3.2 Maintenance intervals ............... 27
11.3.3 Monthly maintenance ............... 27
11.3.4 Half-yearly maintenance............ 27
11.3.5 Annual maintenance ................. 27
11.3.6 Overhaul/further
maintenance........................... 28
11.3.7 After 20,000 hours of
operation or 5 years of normal
operation ............................... 28
11.3.8 After 30,000 to 40,000 hours
of operation ............................ 28
11.4 Work before switching on again .............. 28
11.5 Spare parts ......................................... 28
12 Cleaning...................................................... 28
12.1 Safety information................................ 28
12.2 Preconditions ...................................... 28
12.3 Procedure........................................... 29
13 Deinstallation/dismantling............................... 29
14 Disposal ...................................................... 29
15 EU Declaration of conformity — Axial
fans ........................................................... 30
16 Commissioning Report.................................... 31
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