Screws With Precote Coating; External Fan; External Fan Unit; Replacing The External Fan - Siemens SIMOTICS FD 1MQ1 Operating And Installation Instructions

9.2.2

Screws with preCOTE coating

The motor can partly be fitted with screws with preCOTE coating. To ensure screw locking, use
new screws with preCOTE coating during assembly/repair. As an alternative, use normal
screws with a threadlocker such as Loctite.
9.2.3

External fan

9.2.3.1

External fan unit

The external fan unit is mounted on the NDE radially (at the top or side) or axially. In case of
replacement, remove the complete external fan unit.
Deinstalling
Rotating or live parts
Live electrical parts at the external fan motor are dangerous. Contact with them can cause
death, serious injury or material damage.
1. Before you start working on the fan, disconnect the fan motor from the supply system.
2. Make sure that the device cannot be switched back on.
3. Wait until the external fan has stopped before you continue.
1. Secure the external fan unit against falling before you start working.
2. Loosen the fixing screws that secure the external fan unit to the bearing shield.
3. Observe existing retaining components and retain them for the reassembly.
Assembly
To mount the external fan unit, perform the above instructions in reverse order.
1. Position the external fan unit and tighten the fixing screws.
2. Ensure that the retaining components are undamaged and correctly installed.
9.2.3.2

Replacing the external fan

If the external fan is defective, contact the Service Center (Page 171).
SIMOTICS FD 1MQ1
Operating Instructions 01/2019
WARNING
Maintenance
9.2 Corrective Maintenance
135