Edwards EXC120

© Edwards Limited 2008. All rights reserved. Page 37
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Maintenance
D396-14-880 Issue J
5 Maintenance
5.1 Safety
z A suitably trained and supervised technician must perform maintenance work.
z Isolate the Controller and other components in the pumping system from the electrical supply so that they
can not be operated accidentally.
z Dispose of components safely (see Section 6.2).
5.2 Replace a fuse
5.2.1 Introduction
If a fuse fails immediately after you have replaced it, determine the cause of the failure and rectify the fault before
you use the Controller.
5.2.2 Replace the electrical supply fuse
The electrical supply fuse is an integral part of the electrical supply socket on the rear of the Controller (see Figures
3 to 5).
1. Remove the electrical supply plug.
2. Remove the fuse holder, remove and discard the failed fuse.
3. Insert a new fuse of the correct rating (refer to Table 4) and refit the fuse holder.
5.2.3 Replace the bakeout band fuse (EXC120/300/300M only)
The bakeout band fuse is on the rear of the Controller (see Figures 3 and 5).
1. Turn and pull out the fuse holder.
2. Remove and discard the failed fuse and replace with a new fuse of the correct rating (refer to Tab le 4).
3. Refit the fuse holder.
WARNING
Obey the safety instructions given below and take note of appropriate precautions. If you do not
you can cause injury to people and damage to equipment.