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8.15. Replacing DC/DC converter
Service MTTR 0 - 2 h
Figure 8–18 DC/DC converter Quint-PS-24DC/24DC/10
1. Shut down the PCS6000 according to the "PCS6000 Lockout/tagout procedure",
3BHS600000 E22.
2. Switch off MCB -Q306 (control cabinet, CCU) or -Q401 (POU) to interrupt the 3AC 400 V
input voltages of the AC/DC converter (24 V power supply).
3. In control cabinet, CCU wait until the IPC shut-down is finished (approximately 20 min).
4. On the UPS -G302 (CCU) or -G402 (POU) turn the selector switch "Bat.-Select" to
"Service", then back to previous value (see Fig. 8–2 or Fig. 8–11) to interrupt the 24 V
battery supply voltage (the yellow LED "Bat.-Mode" must be dark).
5. Verify that the input cable is voltage-free.
6. Remove the reinforcement plate in front of the DC/DC converter.
7. POU: for -G404, remove the 48 V supply fuse -X312.9 in the CCU.
8. Disconnect all plugs and detach the module to be replaced.
9. Replace the detached module with a spare one and set the voltage dial to the same
position as the old one.
10. Reconnect all plugs and power up the module by switching on MCB -Q306 (CCU) or -
Q401 (POU).
11. Make sure the LED "DC OK" is lit.
12. Measure the output voltages with a multimeter and adjust the voltage dial if it's not 24
V and 48 V, respectively.
13. Restart the PCS6000 according to section 5.4, Start-up after maintenance or
troubleshooting, page 70.
PRODUCT
PCS6000
DOCUMENT KIND
Service manual
REPLACING CONTROL COMPONENTS
DOCUMENT ID.
3BHS600000 E80
REV.
LANG.
PAGE
F
en
105/272
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Table of Contents
Troubleshooting
