HOUSING ASSEM. 8N1570 - Caterpillar

Personal injury or death can result from high voltage.When power generation equipment must be in operation to make tests and/or adjustments, high voltage and current are present.Improper test equipment can fail and present a high voltage shock hazard to its user.Make sure the testing equipment is designed for and correctly operated for high voltage and current tests being made.
Troubleshooting Chart
Table 1
750 Uninterruptible Power Supply Troubleshooting Chart
What you see: What the event means: What to do:
The display window is blank. The contrast is too light. Press the up arrow in order to darken the display.
The display window is black. The contrast is too dark. Press the down arrow in order to lighten the display.
The system will not restart after the EPO switch has been pressed. When the EPO switch is pressed, the EPO Reset Circuit Breaker trips open. Open the front door and reset the small EPO Reset Circuit Breaker for the EPO switch.
Fan failure is displayed. Fans are equipped with flow indicators. The outlet for the fan is obstructed. Remove the obstruction from the top of the system.
The doors for exhaust do not open. Ensure that the doors open and close freely.
The fans are not plugged into the printed wire board for the Fan Monitor. Ensure that you have good connections.
The fuses are blown on the printed wire board for the Fan Monitor. Replace any fuses that are blown.
The vacuum increases during start-up of the system. Thermal activity within the flywheel causes an increase in pressure. This pressure increase causes the system to cycle on and off until the pressure for the vacuum equalizes. This event is a normal condition for initial start-up.
Tachometer reading is 0 or there is no discernible change in rotor speed. The flywheel is not charging. Make sure that the key switch is in the ONLINE position.
The display panel is beeping. The system is providing a warning indication that an Event has occurred. Go to the Event Log to determine what type of Event has occurred.
The system is regularly displaying Notices on the keypad display. The system is providing warning indications and may need attention or service. Keep a record of frequent Notices and contact the Caterpillar Dealer Customer Service Department, to discuss possible maintenance options.
Notice event: "System Waiting on Vacuum" The system loses some vacuum and heats up when the flywheel first begins to motor. Systems that are "cold started" may have collected some moisture inside the flywheel housing. As the system heats up, moisture will evaporate, temporarily causing vacuum pressure to increase. This phenomenon should go away once the system has been running for several hours.
Notice event: "Vacuum gauge warning: Over maximum value" or "System Waiting On Vacuum". The vacuum pump has failed to start or has been not maintained. Also, the vacuum pump has failed to achieve required performance. Confirm that the vacuum valve (located on bottom of the flywheel housing) is closed. Call the Caterpillar Dealer Customer Service Department if vacuum pump problems continue.
Notice event: "Radial (or axial) bearing vibration