FDI P2131, Technical Manual, Page: 82 / 161

4.1.3 6 ‐ Month Preventive Maintenance
EVERY 6 MONTHS OR 1300 CYCLES
(WHICHEVER OCCURS FIRST)
CHECK TASK
1. Replace the HEPA filter located under the SMU top panel. The HEPA
filter is a safeguard against contamination during vacuum and should
always be in good working condition.
2. Lightly lubricate the chamber doorpost threads using high temperature
(275°F) NLGI #2 grease.
3. Inspect inlet air filter on right ‐ hand side of SMU. If dirty, wash and
reinstall.
4. Inspect air filter on outlet of SMU electrical box cooling fan. If dirty, wash
and reinstall. Remove the SMU top and right ‐ hand side panel to access
this filter.
5. Inspect the heat exchanger in the WRS and clean if dirty.
6. Apply power (120V/60Hz) to heat exchanger fan in WRS and ensure that
it is functional. NOTE: Operation of this fan is normally hidden.
NOTE: On S/N’s after AFS ‐ 0236, there is a single fan mounted on the
heat exchanger mounted on the Back Panel. Operation of this fan can be
observed by checking for air flow during operation of the Sterilizer.
7. Inspect wiring in SMU and WRS electrical boxes for loose wires,
corrosion, or other concerns.
8. Ensure jam nuts on the two front chamber mounts are tight. Also,
ensure the rear chamber mounting bolts are tight.
9. Ensure adequate replacement parts are in stock to ensure your mean ‐
time ‐ to ‐ repair (MTTR) objectives can be met. Reference Section 4.4 and
order parts as needed.
10. Re ‐ torque the 3 doorpost screws to 90 in ‐ lbs.
11. Remove Heater Assembly Cover and Heater Block Enclosure, re ‐ torque
the 8 heater plate nuts to 120 in ‐ lbs. Inspect 3 heater wires before
reinstalling the Heater Block Enclosure and Heater Assembly Cover.
Reference Section 4.3.17 to remove Heater Assembly Cover.
12. Check calibration of Handheld TDS Meter. See Section 3.4.1.
WARNING: To avoid a potential electrical shock or burn hazard, be sure the sterilizer has
been de ‐ energized and depressurized prior to performing these tasks.
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