3. Put on anti-static protection.
4. Unpack the new power-fan controller.
a. Set the new power-fan controller on a flat, static-free surface near the
controller-drive enclosure.
b. Save all the packing materials in case you need to return the power-fan
controller.
5. Ensure that the Power switch on the new power-fan controller is turned off.
6. Check the Power-Fan Service Action Required LEDs on the controller-drive
enclosures to locate the failed power-fan controller.
If a fault is detected, the amber Power-Fan Service Action Required LED is on.
If you can safely remove the power-fan controller, the blue Power-Fan Service
Action Allowed LED is on.
CAUTION:
Risk of electrical shock – Before removing or installing a power supply,
turn off the power switch, and unplug the power cord.
7. Turn off the Power switch on the power-fan controller that has failed.
8. Remove the plastic strain relief from the power cord.
9. Unplug the power cord from the failed power-fan controller.
10. Remove the power-fan controller from the controller-drive enclosure.
a. Rotate the latches to disengage the power-fan controller.
b. Use the latches as handles to pull the power-fan controller out of the
controller-drive enclosure.
Fault LED (amber)
AC power LED (green)
OK to remove LED (blue)
DC power LED (green)
Standby power LED (green)
Figure 106. AC power-supply LEDs
Power
switch
Power
connector
Power
switch
Power
connector
Figure 107. Power-supply switches and connectors for DS3500 AC models
Chapter 5. Replacing components 143
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