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maintenance
A533-23-880 Issue C
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 (13, 14 or 15) 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 Section 2 for the fuse ratings.
4. 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.
6.15
Replace the Pump Display Terminal
Use the following procedure to replace the Pump Display Terminal. Note that you do not need to switch off the iF
system to replace the Pump Display Terminal.
1. Refer to Figure 17. Remove the Pump Display Terminal (8) from the recess (5) in the dashboard.
2. Remove the connector (4) on the cable (7) from the terminal connector (6) in the recess of the dashboard.
3. Fit the new Pump Display Terminal as described in Section 3.7.1.
6.16
Relocate the iF system for maintenance
If you want to remove the iF system from its operating location and move it to another location where you will do
maintenance, use the following procedure.
1. Purge the iF system and shut down the iF system as described in Section 5.9 and allow the iF system to cool
down.
2. Refer to Figure 19. Disconnect the mating-half from the electrical supply connector (9) on the Electrics Box.
3. Refer to Figure 4. Switch off your nitrogen and cooling water supplies. Disconnect the nitrogen supply, taking
care as any trapped gas under pressure is released. Disconnect the cooling water supply followed by the cooling
water return.
4. Refer to Figure 1. Disconnect the inlet (1) from your vacuum system and disconnect the outlet (17) from your
exhaust-extraction system. Fit blanking caps to your vacuum and exhaust-extraction pipelines and to the iF inlet
and outlet (1, 17).
5. If necessary, disconnect the iF air-extraction port (refer to Figure 10) from your factory extraction system.
WARNING
Use suitable lifting equipment to move the iF system.
WARNING
Allow the pump to cool down to a safe temperature before disconnecting or isolating the cooling
water supply. Failure to do so will result in high pressures being generated in the pump cooling
system.
WARNING
System process gases and residue can be highly toxic. Take all necessary precautions when
handling components that have, or could have, come into contact with them, including ’O’ rings,
lubricants, and all exhaust accessories.
