User Notification Leds; Led System Status - Toshiba 4200FA User 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
Normal UPS Operation
(UPS on-line, no abnormal conditions)
AC IN
FAULT
Bypass Operation; UPS Fault
AC IN
FAULT
Battery Back-up; (Battery Voltage Low)
AC IN
FAULT
4200 FA User's Manual
TOSHIBA
ON/OFF STATUS
ON
INV ON
BYP OFF
BATT OFF
OFF
ON
INV OFF
BYP ON
BATT OFF
ON
OFF
INV ON
BYP OFF
BATT ON (Blinking)
OFF
LED
Output Shutdown
(After Emergency Power Off received (EPO))
AC IN OFF
INV OFF
BYP OFF
BATT OFF
FAULT OFF
Fatal Communication Error
(Display to Control Interface)
AC IN
INV
BYP
BATT
FAULT
ON/OFF STATUS
ALL ON OR
FLICKERING
RAPIDLY
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