UPS 120, UPS 150, UPS 250, UPS 300, UPS 301, UPS 500, UPS 600, UPS 750 and UPS 900 Uninterruptible Power Supplies Caterpillar


Front Panel Display (Flywheel Cabinet)

Usage:

UPS 250 APZ


Description



Illustration 1g01275985
(1) Front panel


Illustration 2g01275949
MMS 2.4+ hardware key switch and emergency power off panel
(2) EPO button
(3) Key switch

The cabinet for the flywheel in an SMS system configuration contains a front panel (1). The cabinet for the flywheel in an MMS system configuration contains a front panel (1). The front panel (1) consists of the following components: EPO button (2) and key switch (3).

The key switch (3) has the following modes:

  • Bypass

  • On-line

  • Reset

The EPO button (2) on the front panel (1) of an SMS opens the circuit breakers (K1 and K2). The EPO button (2) also removes power from the load. The EPO button (2) on the front panel (1) of an MMS opens the circuit breakers (K1 and K2). The EPO button (2) also removes power from the multiple module unit (MMU) cabinet.



Illustration 3g01275993
Pre-2.4 hardware front panel for the LCD display
(4) LCD display
(5) Soft keys (6)
(6) Emergency power off button
(7) Alarm LED indicator
(8) Notice LED indicator
(9) Normal LED indicator
(10) Key switch

The SMS system has an LCD display (4) on the front of the cabinet for the Flywheel. Refer to Illustration 3.

The LCD panel contains the following components: LCD display (4), six soft keys (5), EPO button (6), three status indicators (LED) and key switch (10).

The three LED indicators show the status of the UPS. The "Alarm" LED (7) is red when there is an alarm. The "Notice" LED (8) is yellow when there is a notice. The "Normal" LED (9) flashes green when the UPS is on-line. The "Normal" LED is steady when the load is protected.

The MMS Pre -2.4 hardware system has an LCD display on the front of each of the MMU cabinets. Refer to Illustration 3.

The MMS 2.4+ hardware systems do not have the LCD display on the MMU cabinet. Instead, the system has a key switch and an EPO button panel. Refer to Illustration 2.

Removal Procedure (LCD Panel)

Refer to Systems Operation, Testing and Adjusting, RENR9988, "Internal Component Preremoval Steps (Flywheel Cabinet)" in order to shut down the system and gain access to internal components.

  1. Remove the J1 power connector.

  2. Remove the J4 backlight connector.

  3. Remove the J7 remote EPO connector.

  4. Remove the J2 APC connector.

  5. Remove the J11 remote EMO connector.

  6. Remove the grounding screw.

  7. Remove the four nuts and the four lock washers that attach the panel to the cabinet door.

  8. Remove the panel from the front of the door.

Installation Procedure (LCD Panel)

  1. Position the panel in the cabinet door. Refer to Illustration 1 for placement.

  2. Attach the panel to the door with the four nuts and lock washers.

  3. Attach the grounding screw.

  4. Attach the J11 remote EMO connector.

  5. Attach the J1 power connector.

  6. Attach the J4 backlight connector.

  7. Attach the J7 remote EPO connector.

  8. Attach the J2 APC connector.

Removal Procedure (Control)

Refer to Systems Operation, Testing and Adjusting, RENR9988, "Internal Component Preremoval Steps (Flywheel Cabinet)" in order to shut down the system and gain access to internal components.

  1. In order to access the key switch and/or the module for the EPO, open the left cabinet door.

  2. Remove the wires that are attached to the key switch and/or the module for the EPO.

Installation Procedure (Control)

  1. Verify the orientation of the key switch and/or the module for the EPO before installation.

  2. For the push button (EPO), install the button face and the clear shield onto the base unit.

  3. Install the module through the front of the cabinet door. Set the module in place.


    Illustration 4g01276089
    Wire connections for the key switch and/or module for the EPO

  4. Attach the wires to the module. Verify the labeling of the wires with the location of the wires. Refer to Illustration 4 for the wire connections.

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