GASKET 4N1820 - Caterpillar

More information is available if the system is being started for the first time or if there has been a system failure repair.Refer to Operator Maintenance Manual, SEBU8859, "Modes of Operation" for a complete description of all system modes.System Startup Procedure
Refer the user display panel in front of the SIO cabinet.
Illustration 1 g03377486
Touchscreen panel and manual UPS controls
(1) Touchscreen
(2) USB port
(3) Two-position key switch - auto/bypass
(4) EPO button
(5) Horn silence button
(6) Operational state LED lights
Illustration 2 g03354398
Simplified diagram of SIO and FPU cabinet connections
Perform the following steps:
Turn the system key switch to the "Bypass" position.
Prepare for the output bus to have voltage present.
Apply power to the input.Note: Apply power to both inputs if the UPS is a dual input system.Note: If K3 is closed, voltage is present on the UPS output. If K3 is open before power is applied the key switch, may need to be cycled to get K3 to close.
Turn the system key switch to the "Auto" position.
The system does the following:
Closes K1.
Ramp the DC bus with the line static switch.
Turn ON the utility inverter.
Motor the flywheel to 7700 RPM.
Close K2.
Open K3.
Confirm that the system is "Online" by observing the system diagram screen.