SDU AC B-Series
A272-353 Rev. 1 2/2021
11 |
P a g e
6
GREEN MODE
The Green mode is only for 230V models only. By default, Green Mode Enabled. If the load level is less than
approximately 8% ~ 12%, the UPS will shut down to save battery in 3 minutes. If power is restored within 3
minutes the UPS will return to AC mode. Green Mode can be ENABLED or DISABLED by pressing the POWER
ON/OFF at start-up shown on below table.
Green Mode
Alarm
Signal
Enabled
Press Power ON/OFF button and release until "3 beeps"
Disabled
Press Power ON/OFF button and release until "2 beeps"
7
REMOTE ON/OFF
•
Allows the user to perform remote power ON/OFF functions using a switch on terminals (non-polarized) to
toggle ON/OFF state.
•
To Enable the UPS, close the switch that is connected to the terminals.
•
To Disable the UPS, open the switch that is connected to the terminals.
Remote Enable/Disable of UPS
SDU-B Remote
ON/OFF Switch Wired
UPS Condition/State
Switch or Terminal Condition
UPS-B
ON
UPS-B
OFF
Remote ON/OFF Terminals: Shorted (closed) for ON, Open for OFF Non-Polarized terminals.
No external voltage is required. We recommend using stranded UTP (Unshielded Twisted Pair)
wire for connections.
7.0 LED Diagnostics
Condition
Description
LED
Alarm
BACK-UP MODE
UPS is in back-up mode due
to AC Loss
YELLOW
Slow beeping. UPS sounds until
AC utility power recovers.
AC MODE
Normal condition source
supplied by AC Mains
GREEN
No Alarm
AC MODE
OVERLOAD
Load around 105% of rated
capacity
GREEN/RED
Alarm is ON during overload (if
overload exceeds 105% of nominal
at 5mins, 120% at 10s, and 130% at
3s) and enters retry mode every
10mins, until load is removed. UPS
will not shut down.
Load > 120% of rated c apacity
GREEN/RED
Load > 130% of rated
c apacity
GREEN/RED
BACK-UP MODE
OVERLOAD
Load around 105% of rated
capacity
YELLOW/RED
Alarm is ON during overload (if
overload exceeds 105% of nominal
at 20s, 120% at 10s, and 130% at 3s)
and enters retry mode every
10mins, until load is removed. UPS
will not shut down.
Load > 120% of rated
capacity
YELLOW/RED
Load > 130% of rated
capacity
YELLOW/RED
LOW BATTERY
Low Battery Charge
YELLOW
During back-up mode when the
battery charge runs low, the UPS
beeps rapidly (ON 0.5 seconds, OFF
0.5 seconds) until the UPS shuts
down or returns to AC Mode.
Table 1 Diagnostics LED/Alarms
