UPS 1000S/ UPS 1200S Uninterruptible Power Supplys Caterpillar

Description

Illustration 1	g01283663
(1) DC Disconnect Indicators

Illustration 2	g01283664
DC Disconnect Indicators (2) (SW2) Black Push Button (3) (LT1) Green Light (4) (LT2) Red Light

The DC Disconnect Indicators (1) are located on the middle metal shield, that is behind the front door.

There are two illuminated indicators and one push button. One indicator is red ic color and one indicator is green in color and the push button is black in color.

The green light (LT1) (3) indicates that the Flywheel DC Bus Voltage is in the required range and that the DC Disconnect Switch (DCSW) can be operated through the DCSW handle to the left of the indicators.

The red light (LT2) (4) indicates that the Flywheel DC Bus Voltage is not in the required range and that the DCSW should not be operated through the DCSW handle to the left of the indicators.

The black push button (SW2) (2) is located to the left of the red and green indicators. The button has a "push to test" function. The red indicator light and the green indicator light will illuminate when the button is pressed. The illumination of the indicators will test the bulbs in order to make sure that the bulbs are operational.

The black push button (2) should be pressed periodically in order to determine if both bulbs are functioning.

The red and green status indicators use 24VDC bulbs and are connected to the CT Interface PWA (CTI) located on the upper left panel.

Replacement of the Bulb

Note: The bulbs can be replaced without de-energizing the system.

1. Locate the lights that are on the middle metal safety panel, behind the front doors.

2. Remove the colored lens by unscrewing the lens counterclockwise.

3. Press the bulb in and twist counterclockwise to remove the bulb.

4. Install the new bulb by pressing the bulb in and turning the bulb clockwise.

5. Install the clear plastic lens by aligning the tabs and pushing the lens straight on the indicator light.

6. Screw the colored lens clockwise onto the front of the indicator light.

Removal of the Push Button

Refer to Systems Operation, Testing and Adjusting, RENR7654, "Internal Component Preremoval Steps (Flywheel Cabinet)" in order to shut down the system and gain access to internal components.

1. Open the door of the flywheel cabinet and locate the three indicators.

2. Swing the upper left metal panel out in order to gain access to the rear of the push button.

3. Unlock the lever on the bottom of the wire assembly in order to disconnect the wire assembly from the rear button assembly.

4. Disconnect the wires from the wiring assembly by using a screwdriver.

5. Unscrew the rear button assembly from the safety panel and pull back in order to remove the assembly.

6. Squeeze the two small tabs on the sides of the remaining button assembly. Next, slide out the button through the front of the safety panel.

Installation of the Push Button

1. Install the front button assembly into the safety panel by sliding the assembly through the front of the panel.

2. Install the rear portion of the button assembly to the front assembly and screw the assembly down in order to hold the button to the panel.

3. Connect both wires to the wire assembly. Each wires location is marked.

4. Connect the wire assembly to the rear button assembly and lock the wire assembly in place by moving the locking switch.

Removal of the Indicator

Illustration 3	g01283794
DC Disconnect Indicator Wire Connections

Refer to Systems Operation, Testing and Adjusting, RENR7654, "Internal Component Preremoval Steps (Flywheel Cabinet)" in order to shut down the system and gain access to internal components.

1. Open the door of the flywheel cabinet and locate the three indicators.

2. Remove the metal panel that is located in in the upper left in order to gain access to the rear of the push button.

3. Disconnect all wires from the wiring assembly.

4. Remove the rear plastic retaining nut that holds the indicator light to the shield. Turn the nut clockwise to remove.

5. Remove the indicator light by sliding the indicator straight out through the front of the safety panel.

Installation of the Indicator Light

1. Install the indicator light into the safety panel by sliding the indicator light through the front of the panel.

2. Install the plastic nut that holds the indicator light to the metal shield. Turn the nut counter-clockwise to install.

3. Connect all wires to the indicator light. Each wires location is marked. Refer to illustration 3.

4. Install the bulb, the clear lens, and the colored lens.