MAINTENANCE
PREVENTIVE MAINTENANCE PROCEDURES
6 - 6 I-E96-506B1
®
6. The measured voltages should be within the specifications
under module voltage requirements in Table 1-4.
7. If the module bus voltages are not within specification, ver-
ify that the system is properly sized. Refer to Appendix B for
the power system sizing procedure.
Power Entry Panel Inspection and Check
This procedure applies to IEPEP01, IEPEP02 and IEPEP03
Power Entry Panels. The system must be shut down to perform
this maintenance task.
NOTE:
Removal of the power entry panel may require two people.
1. Turn off power at the external circuit breakers that feed
power to the power entry panel.
2. Use the 4-inch screwdriver to disconnect all wires and
cables from the rear of the power entry panel. Label the wires
according to their terminal assignments.
3. Use the 16-inch flathead screwdriver to remove the
4 screws (2 on each side) that hold the power entry panel in
position.
4. Remove the power entry panel by sliding it out the back of
the cabinet.
5. Remove the top cover from the power entry panel by remov-
ing the 3 screws securing it at the rear of the power entry
panel.
6. Check the tightness of all power wiring screws within the
power entry panel. Torque all No. 6 screws to 0.90 Newton
meters (8 in-lbs). Torque all No. 8 screws to 1.58 Newton
meters (14 in-lbs).
7. Inspect and clean the power entry panel, AC transfer mod-
ule and bus monitor module.
8. Replace the power entry panel top cover and install the
power entry panel.
9. Connect all wires and cables removed from the power entry
panel in Step 2.
Printed Circuit Board Cleaning
There are several circuit board cleaning procedures in this sec-
tion. These procedures cover circuit board cleaning and wash-
ing, cleaning edge connectors and circuit board laminate
between edge connectors. Use the procedures that meet the
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