• Topic ID: id_16157963
  • Version: 1.0
  • Date: Jul 7, 2018 4:36:51 PM

Clean Pancake DAS Fan Filters

Prerequisites

Overview

 Procedure Effectivity:

note:

This procedure is necessary to Maintain the cooling capacity of the PDAS.

Procedure

  1. Move the table to the lowest elevation.
    • warning
    • Potential for Shock.
    • Voltage may be present.
    • Use proper lockout/tagout procedures.
  2. Turn off the facility power to PDU.
  3. Remove the Gantry side covers.
  4. Lift off the top cover.
  5. Remove the "scan" window.
  6. Remove the front cover.
  7. Clean or replace Pancake Das Fan Filter
    1. Rotate the Gantry until the DAS/DUCT Fan assembly is within serviceable reach.
    2. Engage the rotational lock. See Figure 1

      Figure 1. Rotational Lock

    3. Disconnect the fan harness.
      4. Notice Image
      • notice
      • POTENTIAL FOR EQUIPMENT DAMAGE. USING VACUUM HOSE NEAR LIVE ELECTRONIC EQUIPMENT MAY CAUSE EQUIPMENT DAMAGE DUE TO STATIC. MAKE SURE EQUIPMENT IS TURNED OFF PRIOR TO VACUUMING NEAR ELECTRONIC EQUIPMENT.
    4. Vacuum the dust from fans on the DAS fan cover
    5. Remove the fan cover from DAS chassis. See Figure 2
    6. Vacuum the dust from the filter, See Figure 3 or replace the filter if necessary, replacement procedure refer to PDAS ADB Filter Replacement

      Figure 2. DAS Fan Cover Removal

      Figure 3. DAS Filter

  8. Clean or replace DIFB Fan Filter
    1. Two DIFB Fans located behind the Gantry DAS frame, remove the DIFB fan filter by unscrewing its 4 screws on each fan. See Figure 4

      Figure 4. DIFB Fan

    2. Vacuum the dust filter on the DIFB Fan, or replace the filter if necessary
    3. Restore the DIFB Fan Filter by screwing its 4 screws on each Fan.
  9. Restore the fan harness connection.
  10. Reassemble the Gantry covers and the scan window.
  11. Restore the power.

Finalization

No finalization steps.