Siemens SINAMICS S120 Manual page 515

Description
The fan does not operate continuously, but only when required; it is monitored in operation.
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. Remove the retaining screws for the Control Interface Module (2 screws).
2. Completely remove the fan assembly from the device. The power supply automatically
disengages when withdrawing.
NOTICE
Secure the fan module so that cannot topple over
When withdrawing the fan module, the module housing or the plug connector can be
damaged if the module is not secured to prevent it toppling over.
• Carefully withdraw the fan module and secure it so that it cannot topple over.
Air-cooled chassis power units
Equipment Manual, 06/2020, 6SL3097-5AE00-0BP3
Maintenance and Servicing
10.4 Replacing components
513