Led Indications - Liebert 7200 Series User Manual

Chapter 1 - General Description
Single Module and 1+1 Parallel System
1.3.1

LED indications

The control and display panel LED indications are illustrated in figure 1-5 and described in the
following text:
1. Bypass a.c. input supply present:
This led illuminates when the bypass a.c. input power switch is closed and the input supply is
within of set value nominal voltage ( default ±10% ).
2. Load on inverter:
This led illuminates when the output power switch is closed and the load is connected to the
inverter via the K1 contactor.
3. Load on bypass:
This led illuminates when the output power switch is closed and the load is connected to the
bypass a.c. supply via the static switch.
4. Battery Status:
This LED illuminates when the battery is discharging and flashes when the battery circuit
breaker is open.
5. 5 LED bargraph indicating % load:
These LED's illuminate progressively from the left to indicate the applied load as a percentage
of the maximum current load, increasing in 20% steps to 100% of full load when all five LEDs
are illuminated. The applied load reading is taken from the phase supplying the highest load.
6. 5 LED bargraph indicating % battery charge state or battery time remaining:
These LED's illuminate progressively from the left to indicate the state of charge of the battery
as a percentage of full charge, increasing in 20% steps to 100% when all five LEDs are
illuminated.
When the mains a.c. input supply fails and the UPS is operating on the battery, this bargraph
changes to give the battery time remaining. With a fully charged battery all five LEDs will
illuminate showing ten minutes or more autonomy, as time elapses the LEDs will extinguish in
steps starting from the right hand side.
7. Overload indication:
This amber LED is situated at the end of the % load bargraph and illuminates to indicate that
the applied load has exceeded 100%. This indication will be accompanied by audible and visual
LCD warnings.
8. Low Battery:
This amber LED is situated at the end of the % battery charge bargraph and illuminates when
operating on battery to indicate that the battery voltage is low at 1.8 volts per cell and that the
UPS will shortly shut down.
9. Alarm warning indication/alarm silence switch:
This red LED will flash whenever the UPS detects certain fault conditions and will normally be
accompanied by an audible warning. Pressing the button will silence the audible warning but
will not cancel the visual indication if the fault condition is still present.
Switch - Emergency Power Off (EPO):
The optional EPO switch is located remote to the UPS cabinet in a position agreed with the user. When
the EPO switch is pressed it disables the static switch block entirely (so removing load power). It also
disables the rectifier and inverter, and trips the battery circuit breaker. Under normal circumstances it
does not remove UPS input power since this is applied through a manually controlled external isolator;
however, if the UPS input supply is connected via a circuit breaker having an electrical trip facility,
Page 1-8
Issue 6
(03/98)
document in response to "powersure ups"
7200 Series UPS User Manual
Operator Control and Display Panel