Installation and Operation Manual
MAN332%1.pm5
page 6
2.2 Front Panel Test/Silence Button
The Test/Silence Button has two functions:
1. If you press the Test/Silence Button when mains is available, the UPS tests itself by switching to its
internal battery for a few seconds. We recommend you close all your open files before initiating this
test.
2. If mains fails, the UPS warns you with an audible alarm. To silence the alarm, press the Test/Silence
Button. The alarm returns, beeping faster, when the UPS battery is low. To silence the alarm again,
press the Test/Silence button.
2.3 Status Indication
PTM280VA and PTM420VA Front Panel LEDs:
Front Panel LED
Condition
Green
ac Mains present
Orange (flash every 4 seconds)
Battery discharging on mains failure
Orange
Overload
Orange
UPS fault condition
Orange (flash once), then green
Self test activated
PTM650VA and PTM1KVA Front Panel LEDs:
Front Panel LED
Condition
Boost Mode:
The UPS is correcting a brownout condition.
The UPS raises the output voltage by approximately 12% higher
than the input voltage, without drawing internal battery power.
Normal Mode:
The UPS is in normal mode and is providing power
to the load. The output voltage matches the input voltage and the UPS
continues to filter and provide surge protection.
Buck Mode:
The UPS is correcting an overvoltage. The UPS lowers
the output voltage by approximately 12% lower than the input voltage,
without drawing internal battery power.
Battery Mode:
The UPS is providing battery from its internal battery.
This LED also lights when the UPS is performing a self-test.
Battery Weak:
The battery voltage is low. This indicates that the battery
needs either recharging or replacing.
Overload:
The UPS is being overloaded. The load must be reduced
immediately.