UPS 250, UPS 300, UPS 500, UPS 600, UPS 750 and UPS 900 Uninterruptible Power Supply Caterpillar

Illustration 1	g00986651

Removal Procedure

1. Place the system in bypass mode by turning the keyswitch to the Bypass position.

2. Isolate the system from the load by closing the bypass circuit breakers.

3. Open the circuit breaker for the output of the system.

4. Open the AC circuit breaker for the input of the system.

5. Allow the capacitor banks to bleed down for approximately 5 minutes.

   Note: When the flywheel is spinning, the following components are energized: the bus, the armature leads and the fuses. Accomplish the procedure as quickly as possible. During the procedure, the rotor is spinning on the bottom bearing.

6. Label all the input wires and all of the output wires.

7. Disconnect the "24 VDC" connector from terminal "J4" (5) .

8. Disconnect the "Remote Panel Out" connector from terminal "J5" (2) .

9. Disconnect the "CS View NET" Connector from Terminal "J8" (1) .

10. Disconnect the "APC Input" connector from terminal "J2" (6) .

11. Disconnect the "APC Output" connector from terminal "J3" (7) .

12. Remove the green ground wire.

13. Remove the board from the seven plastic mounting spacers.

Installation Procedure

1. Install the new System Input Output Daughter Board by snapping the board onto the seven plastic mounting spacers.

2. Install the green ground wire.

3. Connect the "APC Output" connector to terminal "J3" (7) .

4. Connect the "APC Input" connector to terminal "J2" (6) .

5. Connect the "CS View NET" Connector to Terminal "J8" (1) .

6. Connect the "Remote Panel Out" connector to terminal "J5" (2) .

7. Connect the "24 VDC" connector to terminal "J4" (5) .