User Manual 10H52258UM60 - Rev. 3 - 01/2019
36
APM 400/600
Operation Control and Display
Indicator
State
Description
Flashing green
Mains input is normal; but the rectifier is not operating.
Solid red
Rectifier fault.
Off
The rectifier is not operating, or it is operating correctly but the mains
input is 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 is abnormal (Failed, Over-current or Over temperature)
Off
Battery and battery converter operating normally. The battery is
charging.
Bypass indicator
Solid green
Load on bypass
Solid red
Bypass power is abnormal or outside specifications (meaning it is out of
tolerance). Alternatively, there may be a static bypass switch fault
Off
Normal Bypass operating mode
Inverter indicator
Solid green
Load on inverter
Flashing green
Inverter turning on, starting up, or synchronizing
Solid red
Inverter fault
Off
Inverter is non-functional
Output indicator
Solid green
UPS output On and Normal
Solid red
UPS output On and Overloaded
Off
UPS output off
Status indicator
Solid green
Normal operation
Solid yellow
UPS alarm (for example, no battery)
Solid red
UPS fault (for example, fuse or hardware fault)
5.3
Audible Alarm (Buzzer)
The Buzzer or the UPS activity is associated with the two different sounds described in Table 5.3.
Table 5.3
Alarm sound
Description
Beep every other second
General fault alarm, for example, module overload, battery disconnected, fan failure,
parallel load sharing failure, battery discharge pre-alarm, etc.
Continuous beep
General fault alarm, for example, inverter relay short circuit, bypass STS short
circuit, bypass back-feed, inverter fault, etc.
5.4
Control Keys
The Operator Control and Display panel includes 5 control keys, which are described in the table following Table
5.4.
Table 5.4
Control key
Silkscreen
Description
EPO switch
EPO
Cuts off the load power and battery, shuts down the rectifier,
inverter, and static bypass
Inverter start switch
INVERTER ON
Starts the inverter
Inverter
shutdown
switch
INVERTER OFF
Shuts down the inverter
Fault reset switch
FAULT CLEAR
Clears fault before restarting the UPS
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