Siemens SINAMICS S120 Manual page 401

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
Device damage as a result of damaged signal cables when removing
Signal cables can become damaged when the fan is removed. This can cause the device to
fail.
• When removing the fan, ensure that you do not damage any signal cables.
Installation
To reinstall, perform the above steps in reverse order.
Note
Reset the operating hours counter
Following fan replacement, the operating hours counter of the fan should be reset via p0251
= 0.
AC Drive
Manual, (GH6), 07/2016, 6SL3097-4AL00-0BP5
11.3 Service and maintenance for Chassis format components
Service and maintenance
401