Siemens MOBILETT Plus HP Maintenance Instruction page 15

General
Fig. 4:
•
Disconnect the batteries by removing one of the KBATT plugs
(1/Fig. 5 / p. 15)
•
Measure the residual voltage at test points CAPPOS and CAPNEG on board D7
(Fig. 3 / p. 14)
WARNING
- Make sure that the correct measurement range is set on the measurement device.
- Connect the measurement device to CAPPOS and CAPNEG.
- Switch S10 off. Connect the mains cable and switch the system ON.
- Check whether the voltage increases.
- Switch the system OFF, disconnect the cable and switch S10 on.
- Check whether the voltage decreases.
WARNING
- Measure the voltage on the capacitors in M11 and check that the voltage level is <2 V
DC. If not, discharge the capacitors with R103, see
Siemens AG
Medical Solutions
KBATT plug connect
.
. The voltage measured must be less than 2 VDC
Risk of electrical shock!
Non-compliance can lead to injuries or death.
If the voltage measured between CAPPOS and CAPNEG
is 0 V, the measurement device could be defective or the
wires between the CAPPOS and CAPNEG test points on
the capacitor bank could be damaged.
The capacitors could still be charged.
In this case, proceed as follows:
If U11 or U301 is blown, the capacitor in M11 will not be discharged
with S10.
The capacitors could still be charged.
Verify that U11 or U301 has not blown. The capacitor in
M11 must then be discharged as stated below.
SPR8-220.101.04.03.02
07.05
Fig. 5: KBATT plug disconnect
(1/Fig. 4 / p. 15)
(Fig. 6 / p. 16)
Page 15 of 64
CS PS 24
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and
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MOBILETT Plus HP