
7.3 Greasing the roller bearings prior to commissioning..............................................................65
7.4 Minimum radial forces for cylindrical roller bearings..............................................................65
7.5 Commissioning an external fan..............................................................................................66
7.6 Switch on................................................................................................................................67
7.7 Overspeed..............................................................................................................................68
7.8 Switch off................................................................................................................................69
8 Operation....................................................................................................................................................71
8.1 Switching on the machine......................................................................................................72
8.2 Regreasing roller bearings.....................................................................................................73
8.3 Deactivating...........................................................................................................................73
8.4 Switching on again after an emergency switching-off............................................................73
8.5 Stoppages..............................................................................................................................73
8.5.1 Measures in non-operational periods.....................................................................................74
8.5.2 Avoidance of frost and corrosion damage in the cooling system...........................................75
8.5.3 Avoidance of damage to roller bearings during stoppages....................................................75
8.5.4 Measurement of the insulation resistance after an extended stoppage.................................75
8.6 Decommissioning the machine..............................................................................................76
8.7 Re-commissioning the machine.............................................................................................76
8.8 Special operating conditions..................................................................................................77
8.9 Faults ....................................................................................................................................77
8.9.1 Inspections in the event of faults............................................................................................77
8.9.2 Faults in operation..................................................................................................................78
8.9.3 Faults at the external fan........................................................................................................78
8.9.4 Air-to-water heat exchanger faults.........................................................................................79
8.9.5 Roller bearing faults...............................................................................................................80
8.9.6 Brush faults............................................................................................................................81
8.9.7 Commutator faults..................................................................................................................82
9 Maintenance...............................................................................................................................................83
9.1 Inspection and maintenance..................................................................................................83
9.1.1 Initial inspection......................................................................................................................84
9.1.2 MTTR.....................................................................................................................................86
9.1.3 Main inspection......................................................................................................................86
9.1.4 Regreasing rolling-contact bearings.......................................................................................87
9.1.5 Regreasing intervals and grease types..................................................................................88
9.1.6 Clean the machine.................................................................................................................89
9.1.7 Checking the carbon brushes................................................................................................89
9.1.8 Replacing the carbon brushes...............................................................................................90
9.1.9 Setting the brush rocker and brush holder.............................................................................91
9.1.10 Maintaining the commutator...................................................................................................91
9.1.11 Maintaining terminal boxes....................................................................................................93
9.1.12 Touch up any damaged paintwork.........................................................................................94
9.2 Repair.....................................................................................................................................94
9.2.1 Prepare servicing work...........................................................................................................95
Table of contents
SIMOTICS DC 1HS5
Operating Instructions 02/2016 7