BI619954
Edition 03.2009
7.6.2 • • • •
Maintenance, Trouble-Shooting and Repairs
Testing Isolate the power supply by switching off the drive power contactor Keep the auxiliary supply ON. Using a voltmeter, check the DC Bus to make sure that all capacitors have discharged. Use an adequate meter for a DC level of 2000 V. Check the error memory in SIBAS and check for the IGBT module related errors.
For diagnoses there are LED’s on HST and DST modules.
These have following functions: Diagnosis LED on HST Name
Colour
H11 H21 H31
Green LED glows Red LED glows Yellow LED glows
Status
Information
Control voltage (before Rg)<-2V Control voltage (before Rg)<+2V HST power supply ok and no switch off due to short circuit
Diagnosis LED on DST/QST Name
Colour
Status
H1 H2 H3
Green Green Yellow
LED glows LED glows LED glows
H4
Red
H5
Red
LED glows LED flashes (2Hz) LED glows LED flashes (2Hz)
Information
Control voltage (before Rg)<-2V Control voltage (before Rg)<+2V HST power supply ok and no switch off due to short circuit Fault in HST A10 or A20(Phase L1) Braking chopper coded (Phase L1) Fault in HST A30 and A40 (Phase L2, only SD-1500WL) Braking chopper coded (Phase L2, only SD-1500WL)
Note: H1 and H3 will never glow simultaneously H4 and H5 display only HST faults, not the under voltage faults on DST/QST If nothing can be concluded looking at the above mentioned LED’s proceed with the following steps To make it possible to do measurements on the power connectors located in backside of module, the module must be removed from the container. For this, first lock out the main power supply and Auxiliary power supply. •
Dismantle the retaining brackets for the module and disconnect the control shielded cable from both ends (module and cabinet) to prevent any module damage.
Measuring points Siemens Ltd. A5E01511750J/ 4M-2601-1645240 AC
Shovel 295HD/ HR DCC Operation & Maintenance Manual
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