MGE UPS Systems EPS 8000 - Manual (Page 21)

Introduction page 1 — 11
Users Manual
1.5.3.1 LED Alphanumeric Indicators
Fourteen alphabetically labeled LEDs provide detailed information on UPS status as follows:
A: Emergency shutdown
This red LED indicates that the emergency power off (EPO) or remote emergency power off (REPO) has been
activated. See section 2.12.1, Emergency Shutdown.
B: Rectifier/charger on
This green LED indicates that the rectifier/battery charger is on.
C: Rectifier/charger fault
This red LED indicates an alarm condition within the rectifier/battery charger. it indicates the presence of one of the
following fault conditions:
◗ Input circuit breaker Q1 open
◗ Input power protection fuse blown
◗ Rectifier/battery charger over-temperature
◗ Battery charge overcurrent
◗ Battery overvoltage
◗ Rectifier/battery charger control board fault
◗ Power supply board fault
D: Main AC input (mains 1) outside tolerance
This orange LED indicates that the main AC input (mains 1) source is outside tolerance (voltage and/or frequency
too high or too low).
E: Reserved for future use.
F: Battery temperature outside tolerance
This orange LED indicates that the ambient temperature of the battery is too high or too low.
G: Battery charging
This orange LED indicates that the battery is being recharged. This LED functions only when the connected battery
is of the vented lead-acid type (sealed lead-acid batteries will not activate this signal).
H: Inverter fault
This red LED indicates an alarm condition in the inverter, which may be one or more of the following conditions:
◗ Inverter shutdown due to output voltage out of tolerance
◗ Inverter output protection fuse blown
◗ Inverter leg fault
◗ Inverter output transformer over-temperature
◗ Inverter leg over-temperature
◗ Internal clock fault
◗ Inverter control board fault
◗ Power supply board fault