Siemens MOBILETT Plus HP - Page 10

MOBILETT Plus HP SPR8-220.033.03 Page 6 of 8 Siemens-Elema AB
Rev. 02 10.02 SPS-UD Solna, Sweden
1 - 6 General
- 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 1.
Fig. 5
If U11 or U301 is blown the capacitor in M11 will not be dis-
charged 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.
If the charging/discharging does not function, the power conver-
sion unit M10 and M11 must be considered “charged”.
This means a risk of high voltage.
Use caution when performing measurements at the capacitors in
M10 and M11.
Use only the specified measurement devices (350 V DC).
WARNUNGWARNING
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Left connector on D7 to the + connector of the digital multimeter
Second left connector on D7 to the fuse-side (U11) next to the capacitor
Second right connector on D7 to the - connector (GND) of the digital multimeter
Right connector on D7 to the P11 connector on the power conversion unit (M10
)
WARNUNGWARNING