Rockwell Automation SB3000 High Pwr SB3000 AC Pwr Modules (RCS) User Manual

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SB3000 Power Modules (RCS)

4.4.3 Replacing a Blower Assembly

Use the following procedure to replace a blower assembly:

Step 1. Turn off and lock out the AC input power.

Step 2. Wait ten minutes to allow the DC bus voltage to dissipate.

Step 3. Open the cabinet doors and check the voltage across the DC bus bars,

347 A,B,C (+ bus) and 345 A,B,C (- bus), with an external voltmeter to ensure
the DC bus capacitors are discharged before touching any internal
components. See figure 4.1.

Step 4. Turn off the AC power to the blower by turning the circuit breaker in the power

supply panel off.

Step 5. Disconnect the wires from the right side of the blower assembly. The wire

connectors are keyed.

Step 6. Remove the blower from the cabinet by sliding it out.

Step 7. Install the new blower assembly by performing steps 1 through 6 in reverse

order.

Step 8. Close the cabinet doors and reapply power to the SB3000 Power Module.

4.4.3.1 Replacing a Blower Filter

To replace a blower assembly filter:

Step 1. Remove the old filter by sliding it out.

Step 2. Slide the new filter in.

4.4.4 Replacing a Bus Capacitor Assembly

Use the following procedure to replace a DC bus capacitor assembly:

Step 1. Turn off and lock out the AC input power.

Step 2. Wait ten minutes to allow the DC bus voltage to dissipate.

ATTENTION: DC bus capacitors retain hazardous voltages after input
power has been disconnected. After disconnecting input power, wait ten
(10) minutes for the DC bus capacitors to discharge. Open the cabinet
doors and check the voltage across the DC bus bars, 347 A,B,C (+ bus)
and 345 A,B,C (- bus), with an external voltmeter to ensure the DC bus
capacitors are discharged before touching any internal components.
Failure to observe this precaution could result in severe bodily injury or
loss of life.