A590-00-880 Issue D
Page 34 © Edwards Limited 2008. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Maintenance
5.5 Replace a fuse
You can only change the low voltage fuses F8 to F10 (Figure 4, items 3 to 5) for the d.c. electrical supply, the iM
interface and communications module and the emergency stop circuit. Only change a fuse if you have identified and
rectified the cause of the failure.
To change a fuse, refer to Figure 4 and use the following procedure. If the fuse immediately fails when you replace
it, there may be an electrical fault: contact your supplier or Edwards for advice.
1. Use a flat-bladed screwdriver to undo the fuse holder (items 3 to 5) by a 1/4 of a turn, then remove the fuse
holder from the Electrics Box.
2. Remove the failed fuse from the fuse holder.
3. Fit a new fuse of the correct rating in the fuse holder. Refer to Ta b l e 6 for the fuse ratings.
Refit the fuse holder in the Electrics Box, then use a flat-bladed screwdriver to turn the fuse holder clockwise by a
1/4 of a turn to secure it in place.
5.6 Inspect the connections, pipelines, cables and fittings
1. Remove the enclosure side and top panels.
2. Check that all the connections are secure; tighten any loose connections. Inspect all cables, pipelines, hoses and
connections and check that they are not corroded or damaged and do not leak; repair or replace any pipelines,
hoses and connections that are corroded or damaged, or which leak.
Refit the enclosure side and top panels.
Ensure that you replace a fuse with a new fuse of the correct rating. If you do not, the system will
not be adequately protected and you can damage the system or cause injury to people. Do not
remove the cover from the electrics box. High voltages exist in the electrics box when it is
connected to the electrical supply. There are no spare parts that can be serviced in the electrics
box.
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