HP PowerTrust A3589A Manual page 42

Overview
Control Panel Switches and Indicators
UPS/BATTERY Switch
12
WARNING If the Service Bypass switch is in the
be present at the output! This is true regardless of the
UPS/BATTERY switch setting.
Enable Light
13
Output Receptacle
14
Cover
Precharge Failure
15
LED
Battery Precharge
16
Shorting Plate
Caution Light
17
1-20
This slide switch enables or disables operation of the UPS. In the
position (switch to the right), the UPS functions normally.
ENABLE
Depending on other conditions, there may be voltage present at the
AC output, and the UPS may be charging or discharging its
batteries.
Unless the UPS is in Bypass Mode, it is completely disabled when
this switch is in the
DISABLE
voltage present at the AC output, and the UPS is neither charging
nor discharging its batteries. The switch should be left in the
position if the UPS is disconnected from AC input power or
DISABLE
the system is shut down for an extended period of time.
Cycling this switch — moving the switch to the
and then back to the
ENABLE
except an Emergency Power Off (EPO) shutdown and an automatic
bypass condition.
This green light indicates that the UPS is enabled and operating.
The Enable light is normally on if the UPS/BATTERY switch is set
to . However, there are two exceptions:
ENABLE
1. If the UPS/BATTERY switch is set to the
while the AC input power is off, the Enable light flashes,
and then remains off until AC input power returns.
2. If the batteries discharge while AC input power is off and
the Output On/Output Off switch is set to
Enable light turns off. It remains off until AC input power
returns.
The cover that prevents the connectors in the output receptacles
from being accidentally unplugged.
When flashing, this red LED indicates that the voltage on the main
inverter has not precharged properly and that the Battery
Precharge Shorting Plate must not be installed.
This plate is used to prevent the battery from being directly
connected to an unenergized inverter assembly. It must be
removed to attach the battery cable and, when reinstalled,
provides a low resistance, direct current path from the battery to
the main inverter.
This light warns that the UPS should not be switched into or out of
Bypass mode.
position (switch to the left); there is no
DISABLE
position — resets all UPS conditions
position, voltage may still
BYPASS
ENABLE
Output On,
position
position
the
Chapter 1