Siemens SINAMICS S120 Equipment Manual page 497

Description
The fan is monitored in operation, and does not permanently run, only when required.
The expected remaining operating time of the fan can be read-out from parameter p0277
"Heat sink fan wear counter".
500 hours before reaching the maximum operating duration, Alarm A30042 "Power unit: Fan
has reached the maximum operating hours" indicated with alarm value "0" in r2124.
When reaching 99 % of the maximum operating duration, Alarm A30042 is output with alarm
value "1" in r2124.
When reaching the maximum operating duration, Alarm A30042 is output with alarm value
"2" in r2124.
If the fan no longer operates correctly, then this is signaled using Alarm A30048 "Power unit:
Fan defective" with alarm value "0" is indicated in r2124.
If the fan does not correctly operate within 10 seconds after powering up after the pulses
have been enabled, then fault F30058 "Power Unit: Heat sink fan defective" is displayed and
shut down with OFF2.
The fans must be replaced in good time to ensure that the device is available.
Preparatory steps
● Disconnect the drive line-up from the power supply
● Allow unimpeded access
● Remove the protective cover
Removal
The removal steps are numbered in accordance with the numbers in the diagram.
1. Loosen the retaining screws of the bottom cover (4 screws) and remove the cover.
2. Remove the retaining screws for the fan assembly (6 screws).
3. Release the connector for the fan supply and remove it.
4. Release the cable from the cable holder.
5. Completely remove the fan assembly from the device.
Installation steps
To reinstall, perform the above steps in reverse order.
The tightening torque of the retaining screws for the fan assembly is 10 Nm.
The tightening torque for the plug connector fastening screws for the fan power supply is
0.5 ... 0.6 Nm.
The tightening torque of the retaining screws of the bottom cover is 10 Nm.
Air-cooled chassis power units
Manual, 07/2019, 6SL3097-4AE00-0BP9
Maintenance and Servicing
11.4 Replacing components
495