Service manual

Always On UPS Systems Inc

>125%, beep once / second

>150%, beep twice / second

• BACK-UP >320VDC, beep once / 3 seconds

<320VDC, beep twice / second

<295VDC, no beeping

• INVERTER IS SHORT CIRCUITED beep continuously

• INVERTER FUSE OPEN beep continuously

• HEAT SINK OVER TEMPERATURE beep continuously

• HIGH DC SHUTDOWN beep continuously

• BYPASS ON STOP beep continuously

• EMERGENCY STOP beep continuously

The buzzer will beep once every time the inverter is switched on or off. This

will allow for the user to be sure the operation was preformed correctly.

E. Bypass LED: This LED is lit when the maintenance bypass breaker is closed. When the

maintenance bypass breaker is closed, the inverter is inoperable. If the

inverter is active when the bypass breaker is closed the inverter will shutdown

immediately.

F. Reserve LED: This LED is lit when the reserve breaker is closed, and the supply is within

operating parameters.

G. Rectifier LED: This LED is lit when the rectifier is operating, the supply is within operating

parameters, the rectifier breaker is closed and the DC bus voltage is within

operating parameters.

H. Battery LED: This LED is lit while the UPS is in back-up mode. This LED also indicates the

results of battery test. If the battery pack does not pass the test, this LED will

flash prompting the user to change the battery pack.

I. Inverter LED: This LED is lit when the inverter is supplying power to the load.

J. Inverter SS LED: This LED is lit when the inverter static switch is operating and the reserve

static switch is turned off. When this LED is on, the load is supplied from the

inverter.

K. Reserve SS LED: This LED is lit when the reserve static switch is operating and the inverter

static switch is turned off. When this LED is on, the load is being supplied by

the reserve. Since the reserve static switch and inverter static switch will never

operate simultaneously, the Inverter SS LED and the Reserve SS LED will

never be lit at the same time.

L. Output LED: This LED is lit when there is AC power present at the output terminals.