
Time Required:
Approximately 15 minutes; time varies based on the number of compute cabinets in a row
About this task
The temperature and humidity sensor on the XC30-LC and XC40-LC system can only be replaced on the most
upstream (with no preconditioner) or downstream end cabinet.
Procedure
1. Power down all of the cabinets in the row.
a. Enter the following command in a terminal window on the SMW:
smw$
xtcli power down Hostname
Hostname
is the cabinet, system, or partition ID; examples include
c0-0
(for a cabinet),
S0
(for a
system), or
p0
(for a partition).
b. For cabinets, place main circuit breakers CB1 and CB2 in the OFF (down) position.
c. For blower cabinets, place the MAIN DISCONNECT switch on the rear panel of the blower cabinet PDU
in the OFF (down) position.
Figure 63. Circuit Breakers for Cabinet (left) and Blower (right)
2. Remove the front and back blowers from the blower cabinet that contains the sensor being replaced.
3. Loosen the captive Phillips screws (2) that attach the sensor bracket to the cabinet frame and pull the sensor
assembly into the cabinet to access the sensor.
4. Remove the T10 Torx+ screws (2) that attach the sensor retainer to the bracket.
5. Pull the top of the sensor out from the bracket and disconnect the sensor from the control cable connector.
System Cabinet Procedures
69