Light Emitting Diode (Led) Functions; Light Emitting Diode (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 is not in an input over-voltage condition, input under-voltage condition, or
power failure state. 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
BATT
FAULT
Bypass Operation; UPS Fault
AC IN
BATT
FAULT
Battery Back-up; (Battery Voltage Low)
AC IN
BATT
FAULT
T O S H I B A
ON/OFF STATUS
ON
INV ON
BYP OFF
OFF
OFF
ON
INV OFF
BYP ON
OFF
ON
OFF
INV ON
BYP OFF
ON (Blinking)
OFF
LED
Output Shutdown
(After Emergency Power Off received (EPO))
AC IN
INV
BYP
BATT
FAULT
Fatal Communication Error
(Display to Control Interface)
AC IN
INV
BYP
BATT
FAULT
42
ON/OFF STATUS
OFF
OFF
OFF
OFF
OFF
ALL ON OR
FLICKERING
RAPIDLY