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9.4.3.4
Checking the cable and screw terminals
● Check the cable and screw terminals regularly to ensure that they are secure.
● Tighten the screws if necessary. When doing this, comply with the specified torques
● Check the cabling for defects.
● Replace any defective parts immediately.
9.5
Maintenance
9.5.1
Replacing a fan
9.5.1.1
Lubricating fan bearings
Lubricate the fan bearings every six months, or more frequently as required.
1. Stop the motor. Open the switch.
2. Thoroughly clean the pipe connections and remove them from the housings.
3. Remove hardened grease from the grease discharge points using a stiff wire or a rod.
4. Press fresh grease into the bearing intake point using a manually operated press until a
5. Remove excessive grease from the connections, replace the intake plugs and allow the
6. Recommission the motor.
Injury caused by rotating fan
If the drive is equipped with a temperature and pressure-controlled fan, the fan can run on
even if the power unit is switched off. You can be injured if you touch the fan.
● Wait until the fan has shut down and has come to a stop.
9.5.1.2
Replacing fans, from the front
● The five safety rules must be observed.
● Be very careful when lifting the fans. The fans are heavy. The fans can fall if incorrectly
SINAMICS PERFECT HARMONY GH150 6SL3826
Operating Instructions 05/2020
(Page 104).
small amount of fresh grease is pressed out of the discharge point.
motor to run for 1/2 hour before reinserting the grease discharge plugs.
CAUTION
handled. This can cause injury and material damage.
Maintenance
9.5 Maintenance
99
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