Replacement Instructions for the Water Group Controller HP Modular Cooling System

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Replacement Instructions for

the Water Group Controller

HP Modular Cooling System

About this document

This document describes the procedure for replacing the

water group controller of an HP Modular Cooling System

(MCS).

Customers who order a replacement water group controller

are supplied with a kit that contains the spare water group

controller. To replace the original water group controller,

remove it from the MCS unit and replace it with the new

water group controller as described in the following

instructions.

HP Modular Cooling System Spare

Replacement video

Because of the difficulty of removing and replacing spare

parts, HP recommends watching the HP Modular Cooling

System Spare Replacement video. This video provides further

explanation and detail of replacement strategies and

techniques that might be helpful when attempting to remove

and replace spare parts. You can access the video on the HP

website (http://www.hp.com/go/mcs

Before you begin

WARNING: To reduce the risk of electric shock or

damage to the equipment, power off the MCS unit

by disconnectin

the two AC power cords connected

to the power inlet box at the rear of the MCS unit

before beginning the removal and replacement

procedures.

The information contained herein is subject to change without notice. The only

warranties for HP products and services are set forth in the express warranty

statements accompanying such products and services. Nothing herein should

be construed as constituting an additional warranty. HP shall not be liable for

technical or editorial errors or omissions contained herein.

Part Number 403355-002

April 2007 (Second Edition)

Summary of content (7 pages)

PAGE 1
Replacement Instructions for the Water Group Controller HP Modular Cooling System About this document This document describes the procedure for replacing the water group controller of an HP Modular Cooling System (MCS). Customers who order a replacement water group controller are supplied with a kit that contains the spare water group controller.
PAGE 2
CAUTION: To reduce the risk of the servers overheating, open all of the rack doors of each rack attached to the MCS unit while completing the following procedures to increase air flow within the rack. 5. Disconnect the network cable from the RJ-45 connector on the power inlet box. Powering down the MCS unit 1. Open the front MCS door. 2. Turn off the AC1 and AC2 breakers on the AC transfer switch. 3. Open the rear MCS door.
PAGE 3
4. 5. 6. Using a T-25 Torx driver, remove the four Torx screws securing the AC transfer switch chassis to the water group controller chassis. The transfer switch chassis cannot be completely removed yet because the cables are still connected. a. Disconnect the three large cables, starting from the Disconnect the green and yellow ground bonding wires from the water group controller. b.
PAGE 4
Removing the water group controller 4. Disconnect the green and yellow grounding wire securing the water group controller to the water group controller chassis. 1. Disconnect the seven electrical cables in the front of the water group controller. 5. Remove the water group controller (mounted on a bracket) from the water group controller chassis. 2. Using an 8 mm socket, remove the two 8 mm nuts and washers securing the water group controller bracket to the water group controller chassis. 6.
PAGE 5
Replacing the water group controller 1. 5. Using an 8 mm socket, secure the water group controller bracket to the water group controller chassis by inserting two washers and two 8 mm nuts. 6. Connect the seven electrical cables to the front of the water group controller. Slide the water group controller onto the mounting bracket until it locks in place. 2. Connect the green and yellow grounding wire to secure the water group controller to the water group controller chassis. 3.
PAGE 6
Replacing the AC transfer switch 1. Connect the green and yellow ground bonding wires to the water group controller. 2. Connect the electrical power cables from the MCS unit to the AC transfer switch. b. Connect the three large cables, starting from the right and moving to the left, by pushing the cable into the connector. 3. Using a T-25 Torx driver, secure the AC transfer switch chassis to the water group controller chassis by inserting four Torx screws. a.
PAGE 7
Complete the operation checklist. Returning the failed component Operation checklist Instructions are provided on the return label supplied with the replacement component. The return label is either in the box in which the component was shipped or in the plastic pouch attached to the box. 5. 1. If power was disconnected, restore power to the MCS unit. a. Open the rear MCS door. b. Connect the network cable to the RJ-45 connector on the power inlet box. c.