b.Using a T-25 Torx driver, insert and tighten the four T-25 Torx screws into each corner of the water group cover.

14.Replace the bottom fan unit ("Replacing the bottom fan unit" on page 29).

15.Replace the water controller ("Replacing the water controller" on page 59).

16.Reconnect the power cables ("Reconnecting the power" on page 73).

17.Complete the operation checklist (on page 73).

Operation checklist

1.If you drained the water from either main hose, reconnect the hoses to the facility water line connection. ("Reconnecting the main water hoses" on page 73)

2.If you disconnected the power, reconnect the power cables ("Reconnecting the power" on page 73).

3.If you shut off the water flowing into the MCS G2 unit, restore water flow to the MCS G2 unit ("Restoring water flow" on page 74).

4.Close all MCS G2 unit doors and connecting rack doors.

5.Clear all old logs from the web interface to ensure that any additional alarms are current.

6.Confirm that no additional warning or alarm messages have been detected by looking at the operator display.

Reconnecting the main water hoses

1.Reconnect the hoses to the facility water line connection, and tighten.

2.Verify that there are no leaks.

Reconnecting the power

1.Open the rear MCS G2 unit door.

2.Connect the two AC power cables to the power inlet box.

Removal and replacement procedures 73