Siemens SINAMICS GL150, Operating Instructions Manual

Page: 129 / 168

9.4.1.7 Checking the DC-link reactor
● Remove any dust deposits.
● If there are leaks at the screw positions, retighten the cable entries. If there are still leaks,
replace the O-rings.
● If the DC link reactor becomes too hot at any particular location, then the color will change
at this location. Identify the cause of the overheating. If necessary, get in touch with your
Siemens contact.
9.4.1.8 Checking the cooling circuit
● Check the entire cooling circuit for leaks. If you find a leak in a pipe coupling, tighten the nut
by a ¼ turn
● Compare the measured conductivity value with the permissible conductivity value for the
system (≤ 0.6 µS/cm). You must replace the ion exchanger if this value is close to 1 µS / cm.
● Check the water level in the compensating chamber of the deionized water circuit. If the
level is too low, add some more water. If the level is too high, drain some water until the level
is correct.
9.5 Maintenance
9.5.1 Replacing a fan
CAUTION
Injury caused by rotating fan
If the converter is equipped with a temperature-controlled fan, the fan can run on even if the
power section is switched off. You can be injured if you touch the fan.
● Wait until the fan has shut down.
9.5.2 Replacing the back-up battery of the AOP30 operator panel
Table 9-1 Technical specifications of the backup battery
Type CR2032 3V lithium battery
Manufacturer Maxell, Sony, Panasonic
Nominal capacity 220 mAh
Maximum permissible charging current 10 mA, limited to < 2 mA in the operator panel
Self-discharge at 20° C 1%/year
Maintenance
9.5 Maintenance
SINAMICS GL150 6SL38555UN113KA0Z
Operating Instructions Rev.201910281450 EXAMPLE
129