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Chapter 3. Installation and Maintenance
EK–SMCPQ–UG. C01 3–33
3.6.4 Replacing the UPS
Proceed as follows to replace the UPS:
1.
Ensure the UPS power switch is set to off.
2.
Disconnect the shelf power cords from the rear receptacles on the UPS.
3.
Disconnect the UPS power cord from the wall outlet.
4.
Disconnect the serial control cable from the controller shelf.
5.
Remove the screws that secure the front panel of the UPS to the cabinet.
6.
Install the replacement UPS and replace the screws removed in step 5 to se-
cure the unit.
7.
Reconnect the power cords and the serial control cable.
8.
Set the UPS output voltage level to your specific ac power source.
9.
Set the UPS power switch to on, set the UPS low-battery warning option to
five minutes (refer to UPS manual), and then power-up the shelf.
3.6.5 Replacing a Blower
WARNING
Only qualified service personnel should access the
rear of the shelf to replace a blower.
The controller shelf has two blowers mounted on the rear. Connectors on the
backplane provide the +12 Vdc to operate the blowers. When a blower fails, the
shelf status (amber) LED on the power supply SBB is OFF and an error message
is passed to the controller or host via the shelf status signal. The Device I/O as-
sembly status LEDs indicate which blower has failed and then automatically
switches the remaining blower to high speed. Refer to the SBB I/O Module
User’s Guide (Part No.: EK-SBBIO-UG) supplied with the device expansion
shelf for additional LED and blower status information.
Use one of the following procedures to replace a blower (see Figure 3–18).
CAUTIONS
The blowers are dual-speed devices and should be
replaced only with identical units.
Shelf air flow is lost when a blower is removed. Re-
place immediately or damage can result.