9 shutdown procedures, 10 alarms – MGE UPS Systems 40-150kVA User Manual

Page 42

3.9

Shutdown Procedures

3.9.1

Inverter 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".

3.9.2

Powering 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.

3.10

Alarms

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.

Comet 40-150kVA

Operation

3 —10

86-160310-00 E00

inverter start-up phase prior to load

normal operation;

buzzer off,

light off,

buzzer on,

light on,

light flashing

load supplied by Comet UPS

transfer. The "inverter on" button has
been pressed.

inverter shutdown following pressing of the

load supplied via the "static switch"

operation on battery power;

"inverter off" button or a major fault;

end of battery power or battery should be

checked

minor fault;

UPS shutdown;

load supplied via maintenance bypass

(load continues to be supplied via inverter)

status or action producing the indication

Legend of alarm indications table:

beep
beep

(SR1 in normal position)