Service manual

Always On UPS Systems
M0704_NX_Series_Service_Manual V2.17 2012-06-12 23
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.
M. Up key: This is an LCD control key. It moves the cursor one field upward when
items are being selected or changes the number/character forward
when data or parameters of the UPS are being set.
N. Down key: This is an LCD control key. It moves the cursor one field downward
when items are being selected or changes the number/character
backward when data or parameters of the UPS are being set.
O. Enter key: This is an LCD control key. It returns to the previous page, and also
confirms the number/character/item selected.
P. Inverter On switch: This is an inverter control switch. When this key is pushed
simultaneously with the control key, the inverter will switch on.
Q. Inverter control switch: This is an inverter control switch. When this key is
pushed in conjunction with the inverter on key the inverter will activate.
Similarly, when this key is pushed with the inverter off key the inverter
will shutdown. This key acts as a safety switch to prevent accidental
operation of the inverter.
R. Inverter Off switch: This is an inverter control switch. When this key is pushed
simultaneously with the control key, the inverter will be switched off.