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4200FA XT 80kVA Installation and Operation Manual
6.8
User Notification LEDs
The following is a list of the user-notification LEDs and their function.
On when the UPS has normal AC input power that is within tolerance. If there is an input
power failure this LED is off. If there is no power failure and the input voltage is in an over-
voltage condition, the AC IN LED will flicker on and off rapidly (0.4 sec on and 0.4 sec off).
If there is no power failure and the input voltage is in an under-voltage condition the AC IN
LED will be off.
On when the UPS inverter is operating.
On when the UPS is in the static bypass mode.
On when the UPS is in the battery-discharge mode. If the battery is low during a battery
discharge, the BATT lamp will flicker on and off slowly (1.2 second on and 1.2 second off).
The BATT LED will go off if the battery voltage reaches the shutdown level during the
battery-discharge mode.
On when the UPS is experiencing a fault.
6.8.1
LED System Status
The following table shows the UPS system status that can be determined by decoding the on
and off condition of the LED lamps. It should be used in conjunction with the LCD display
(see Section 6.9) and the audible alarms (see Section 6.7) for total system monitoring.
LED
ON/OFF STATUS
LED
ON/OFF STATUS
Normal UPS Operation
(UPS on-line, no abnormal conditions)
Output Shutdown
(After Emergency Power Off received (EPO))
AC IN
INV
BYP
BATT
FAULT
ON
ON
OFF
OFF
OFF
AC IN
INV
BYP
BATT
FAULT
OFF
OFF
OFF
OFF
OFF
Bypass Operation; UPS Fault
Fatal Communication Error
(Display to Control Interface)
AC IN
INV
BYP
BATT
FAULT
ON
OFF
ON
OFF
ON
AC IN
INV
BYP
BATT
FAULT
ALL ON OR
FLICKERING
RAPIDLY
Battery Back-up; (Battery Voltage Low)
AC IN
INV
BYP
BATT
FAULT
OFF
ON
OFF
ON (Blinking)
OFF
