Siemens S120 Manual page 477

Description
The average service life of the device fans is 50,000 hours. In practice, however, the service
life depends on other variables, e.g. ambient temperature, degree of cabinet protection, etc.
and, therefore, may deviate from this value in individual cases.
The fans must be replaced in good time to ensure that the device is available.
Preparatory steps
● Disconnect the drive line-up.
● Provide unobstructed access.
● Remove the front cover.
Removal
The steps for the removal procedure are numbered in accordance with the previous diagram.
1. Remove the retaining screws for the fan (2 screws).
2. Disconnect the supply cables (1 x "L", 1 x "N").
You can now carefully remove the fan.
NOTICE
Damage to signal cables while removing the power block
The power block might damage signal cables when it is removed.
• Remember that the power block is very heavy.
Installation
To reinstall, perform the above steps in reverse order.
Note
Connecting fiber-optic cables
The fiber-optic cable plugs must be re-inserted at their original slot. Fiber-optic cables and
sockets are accordingly labeled for correct assignment (U11, U21, U31).
NOTICE
Material damage caused by loose power connections
Insufficient tightening torques can result in faulty electrical connections. This can cause fire
damage or functional faults.
• Tighten all power connections with the specified tightening torques, e.g. line supply
AC Drive
Manual, (GH6), 04/2014, 6SL3097-4AL00-0BP4
connection, motor connection.
11.3 Service and maintenance for Chassis format components
Service and maintenance
477