8.3 Switching off the anti-condensation heating...........................................................................99
8.4 Switching on the machine....................................................................................................100
8.5 Regreasing roller bearings...................................................................................................100
8.6 Switch off the external fan....................................................................................................100
8.7 Switching on again after an emergency switching-off..........................................................100
8.8 Stoppages............................................................................................................................100
8.8.1 Avoidance of condensation or formation of condensation within the machine.....................101
8.8.2 Avoidance of damage to roller bearings during stoppages..................................................102
8.8.3 Shaft grounding brushes (option).........................................................................................102
8.8.4 Measurement of the insulation resistance after an extended stoppage...............................102
8.9 Decommissioning the machine............................................................................................103
8.10 Re-commissioning the machine...........................................................................................103
8.11 faults.....................................................................................................................................103
8.11.1 Inspections in the event of faults..........................................................................................103
8.11.2 Electrical faults.....................................................................................................................105
8.11.3 Mechanical faults.................................................................................................................106
8.11.4 Faults at the external fan......................................................................................................107
8.11.5 Roller bearing faults.............................................................................................................108
9 Maintenance.............................................................................................................................................109
9.1 Inspection and maintenance................................................................................................109
9.1.1 Safety instructions for inspection and maintenance.............................................................109
9.1.2 Measurement of the insulation resistance and polarization index in the context of
maintenance work................................................................................................................111
9.1.3 Inspections in the event of faults..........................................................................................111
9.1.4 First inspection after installation or repair............................................................................112
9.1.5 General inspection...............................................................................................................112
9.1.6 Servicing the roller bearings.................................................................................................113
9.1.7 Servicing and maintaining the anti-condensation heating....................................................113
9.1.8 Regreasing intervals and types of grease for operating roller bearings...............................113
9.1.9 Types and quantities of grease for high-speed machines....................................................117
9.1.10 Sealing the rolling-contact bearings ("Increased degree of protection" option)...................118
9.1.11 Keeping the cooling air flow clean........................................................................................118
9.1.12 Servicing the external fan.....................................................................................................119
9.1.13 Touch up any damaged paintwork.......................................................................................119
9.1.14 Repainting............................................................................................................................120
9.1.15 Maintaining terminal boxes..................................................................................................120
9.2 Corrective Maintenance.......................................................................................................121
9.2.1 Prepare servicing work.........................................................................................................122
9.2.2 Seal the motor......................................................................................................................123
9.2.3 Screws with preCOTE coating.............................................................................................124
9.2.4 External fan cowl..................................................................................................................124
9.2.5 External fan made of metal..................................................................................................125
9.2.6 Internal fan...........................................................................................................................126
9.2.7 External fan..........................................................................................................................126
9.2.8 Ensuring cooling by means of external fans........................................................................126
9.2.9 Roller-contact bearings........................................................................................................127
Table of contents
SIMOTICS TN Series N-compact 1PQ8
8 Operating Instructions 11/2018
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