•Water controller
No tools are required for this procedure.
•Water level sensors o
•Water valve
o
o Pliers (included in the replacement kit) o
Safety considerations
Before performing service procedures, review the following safety information.
Rack warnings and cautions
Before installing a spare kit, be sure that you understand the following warnings and cautions.
WARNING: You must follow the removal and replacement instructions listed in the site preparation guide, the user guide, and the maintenance and service guide. Failure to follow the instructions listed in these guides can void your warranty and service contract.
WARNING: To reduce the risk of electric shock or damage to the equipment, use extreme caution when removing and replacing components that involve water around the electrical wires and unsecured power inlet box. There is great risk of electrical shock when water is used near electricity.
IMPORTANT: To reduce the risk of the servers overheating, open all of the rack doors of each rack attached to the MCS G2 unit while completing the following procedures in order to increase air flow within the rack.
IMPORTANT: While the most important cautions and warnings have been included in this document, consult the site preparation guide and the user guide provided with the original unit for a complete list of cautions and warnings.
Preparation procedures
Before you perform certain service procedures, perform one or more of the following procedures.
Disconnecting the power
1.Open the rear MCS G2 unit door.
Removal and replacement procedures 23