Edwards AIGX-S-DN16CF, Instruction Manual

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MAINTENANCE
D048-50-880 Issue E
5 MAINTENANCE
5.1 Fault Finding Guide
5.2 Replace the Body Tube
Refer to Figure 5 and use the following procedure to replace the body tube.
1. Turn off the gauge.
2. Switch off the AIGX electrical supply and disconnect the electrical supply cable.
3. Remove the AIGX from the vacuum system.
4. Using a suitable screwdriver, remove the two M3 screws (item 2) from the sides of the electronics housing (item
1).
5. Pull the electronics housing (item 1) to remove it from the body tube assembly (item 3).
6. Fit the new body tube assembly (item 3) to the electronics housing (item 1). Take care to ensure that the
locating lugs (item 4) on the body tube assembly (item 3) are aligned with the mating recess in the electronics
housing (item 1). Note that the electronics housing (item 1) can only fit one way round on the body tube
assembly (item 3).
7. Refit the two M3 screws to the sides of the AIGX.
5.3 Replace the Internal Fuse
If you suspect that the internal fuse has blown, you should check that the voltage and polarity of the electrical supply
are correct before replacing the fuse.
To replace the fuse refer to Figure 6 and use the following procedure:
WARNING
Disconnect the electrical supply cable before you start any maintenance. High voltages are
generated inside the AIGX.
Table 6 - Fault Finding Guide
Symptom Possible Cause Remedy
LED Not Lit Supply connection incorrect or faulty.
Supply polarity reversed. Check electrical supply and connections.
Internal fuse blown. Replace fuse. Refer to Section 5.3
Over-pressure trip The pressure rose too high whilst the
AIGX was operating. Reduce the pressure and re-enable the
AIGX.
Emission error The AIGX was enabled when the
pressure was too high. Reduce the pressure and re-enable the
AIGX.
Filament contaminated. Filament open
circuit. Switch to the other filament. If both
filaments give the error, replace the
body tube. Refer to S
Section 5.2 .
Electrical supply insufficient to drive the
AIGX. Check that supply voltage/current
specifications meet requirement in
Section 2.3.1 .