MGE UPS Systems 40-150kVA Shutdown Procedures, Alarms, Inverter Shutdown, Powering Down

Comet 40-150kVA

3.9Shutdown Procedures

3.9.1Inverter Shutdown

◗Press and hold the gray "Inverter OFF" pushbutton for 3 seconds.

◗The green “Load Protected” LED goes off.

◗The red “Load Not Protected” LED goes on.

◗The buzzer sounds.

◗The Inverter stops if the transfer conditions are correct.

◗The load is transferred and supplied via the "Static Switch".

3.9.2Powering Down

It is recommended not to power down the Comet for long periods because the battery should remained charged. However, to carry out a power down, proceed as follows:

◗Shut down the Inverter.

◗Put the battery circuit breaker in the "OFF" position.

◗Put the upstream main circuit breaker in the "OFF" position.

◗All the indicating LED's on the control panel go off.

3.10Alarms

Any state other than normal operation (green “Load Protected” LED on) is considered a fault by the diagnostics system.

Before undertaking any servicing or other action, note the status of the different LED's and the GUI messages displayed on the panel.

If an alarm is present and the load still functions, it is supplied via the "Static Switch", i.e. it is not protected. Table 3-1: Alarm Indications.

beep beep

beep beep

beep beep

beep beep

status or action producing the indication

inverter start-up phase prior to load transfer. The "inverter on" button has been pressed.

normal operation;

load supplied by Comet UPS (SR1 in normal position)

inverter shutdown following pressing of the "inverter off" button or a major fault;

load supplied via the "static switch"

operation on battery power; load supplied by Comet UPS

end of battery power or battery should be checked

minor fault;

(load continues to be supplied via inverter)

UPS shutdown;

load supplied via maintenance bypass

Legend of alarm indications table:

buzzer off,

light off,

beep
beep	buzzer on,
	light on,
	light flashing

3 —10 Operation 86-160310-00 E00