Chapter 4 Operator Control And Display Panel 27
APM 300 Integrated UPS Single Module And Parallel System User Manual
Table 4-2
Description of indicators
Indicator
State
Description
Rectifier indicator
Solid green
Rectifiers in normal operation
Flashing green
Mains input normal, but rectifiers not operating
Solid red
Rectifiers failed
Off
Rectifiers not operating, mains input abnormal
Battery indicator
Solid green
Load on battery
Flashing green
Battery EOD pre-warning
Solid red
Battery abnormal (failed, absent or polarity reversed) or battery
converter abnormal (failed, overcurrent or overtemperature)
Off
Battery and battery converter normal, battery charging
Bypass indicator
Solid green
Load on bypass
Solid red
Bypass power abnormal or outside specifications, or static bypass switch
fault
Off
Bypass normal
Inverter indicator
Solid green
Load on inverters
Flashing green
Inverters turning on, starting up, synchronizing, or standing by (ECO
mode)
Solid red
Inverter fault
Off
Inverters not operating
Load indicator
Solid green
UPS output on and normal
Solid red
UPS output on and overloaded
Off
UP output off
Status indicator
Solid green
Normal operation
Solid yellow
Alarm (for example, AC input failure)
Solid red
Fault (for example, fuse or hardware fault)
4.1.2
Audible Alarm (Buzzer)
UPS activity is accompanied by the two kinds of sound listed in Table 4-3.
Table 4-3
Description of audible alarm
Alarm sound
Meaning
Beep every other second
A UPS alarm (for example, AC input failure) took place
Continuous beep
A UPS fault (for example, fuse or hardware fault) took place
4.1.3
Control Keys
The operator control and display panel provides five control keys, as described in Table 4-4.
Table 4-4
Description of control keys
Control key
Description
EPO
Cut off the load power, shut down the rectifier, inverter, static bypass and battery
INVERTER ON
Start the inverter
INVERTER OFF
Shut down the inverter
FAULT CLEAR
Restart the UPS (subject to any fault being cleared)
SILENCE ON/OFF
When an alarm is active, pressing this key silences the audible alarm. Pressing this key again
enables the buzzer again
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