Service manual

Always On UPS Systems
M0704_NX_Series_Service_Manual V2.17 2012-06-12 22
• EMERGENCY STOP – the inverter has shutdown because the
emergency stop switch has been activated.
• DATA LINE – blinks when data is being transmitted or received via the
communication port.
D: Buzzer outlet: There is a buzzer located behind the LCD Display. The buzzer will
allow for audile notification when an abnormal condition occurs. The
buzzer will be activated if one of the following conditions occur: (The
frequency of the buzzer is also described for your reference.)
• INVERTER IS OVERLOADED >110%, beep once / 3 seconds
>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.