Service manual

Always On UPS Systems
M0704_NX_Series_Service_Manual V2.17 2012-06-12 21
• INVERTER SS – inverter static switch is active.
• SHORT CIRCUIT – UPS output is in a short circuit state.
• FUSE/OVER TEMP SD – inverter has shutdown due to inverter fuse
open or heat sink temperature above operating parameters.
• INVERTER FAIL SHUTDOWN – inverter has shutdown due to inverter
output voltage below tolerances.
• BYPASS ON SHUTDOWN – inverter has shutdown because the
bypass breaker has been activated while the inverter is supplying
power to the load.
• HIGH DC SHUTDOWN – inverter has shutdown because the DC Bus
voltage is outside of operating parameters while the inverter is
operating.
• OVERLOAD SHUTDOWN – inverter has shutdown because an
overload condition has been detected on the output. The inverter will
automatically restart after the condition has been removed for a period
of seven seconds.
• 70% LOAD – load connected to the output is over 70% of the UPS
rating.
• 110% LOAD - load connected to the output is over 110% of the UPS
rating.
• 125% LOAD - load connected to the output is over 125% of the UPS
rating.
• 150% LOAD - load connected to the output is over 150% of the UPS
rating.
• RESERVE AC FAIL – supply voltage to the Reserve is outside of
operating window.
• RESERVE FREQ FAIL – supply frequency to the Reserve is outside of
operating window.
• BATTERY LOW – the DC bus (or battery) voltage is lower than
320VDC. Low battery shutdown is approaching.
• BATTERY LOW SHUTDOWN – the inverter has shutdown because
the DC bus (or battery) voltage is below operating level (lower than
295VDC).
• RECT AC FAIL – supply to rectifier is outside of operating window.
• ROTATION ERROR – supply phase rotation is incorrect.
• RECTIFIER SHUTDOWN – the rectifier has shutdown because the DC
bus voltage has exceeded maximum operating level (over 445VDC).
The rectifier will automatically restart 30 seconds this abnormal
condition has been cleared.
• HIGH DC – the DC voltage has exceeded maximum operating level
(over 430VDC). The bus voltage is limited to this voltage.
• BOOST CHARGE – the batteries are being boost charged by the
rectifier.
• BATTERY TEST – batteries are being tested.