Siemens MOBILETT Plus Service Instructions Manual page 58

7 - 2
S10
Fig. 1
•
Remove the system upper cover.
•
Discharge the capacitor bank with S10 (D7) (Fig. 1).
•
Wait for 5 minutes before removing the left and right covers and the column cover.
•
Measure the residual voltage at measuring points, CAPPOS an CAPNEG. The voltage
must be less than 10 V (Fig. 2). If the voltage is measured to 0 V, the measuring device
could be defective or the cables between the capacitor bank and CAPPOS, CAPNEG
could be damaged. In this case, proceed as described in items a - e below to avoid
personal injury.
a. Connect the power plug.
b. Connect the measurement device.
c. Switch on S10 on D7. Check whether the voltage increases.
d. Switch off S10. Check whether the voltage decreases.
e. If the measurement device does not register any voltage, disconnect the power plug
and check the measurement device.
MOBILETT Plus/ Plus E
Fig. 2
SPR8-215.898.02
Rev. 01 01.02
Capacitor bank
Page 2 of 6 Siemens-Elema AB
SPS-UD Solna, Sweden