Liebert 1500 User Manual
28 Operation
4.0
O
PERATION
4.1
General
This chapter describes the control, adjustment and operational features of the Helios DC System
4000/48.
4.2
Conventional Controller
The Conventional Controller monitors the operation of the entire power plant. It monitors all the
alarms, and it controls and monitors the rectifiers.
Provision is made on the back of the Conventional Controller to extend any occurring alarm to the
Provision is made on the back of the Conventional Controller to extend any occurring alarm to the
alarm center through the facilities provided in the powered equipment.
All of the control switches, potentiometers, operational and alarm visual indications are located at
All of the control switches, potentiometers, operational and alarm visual indications are located at
the front of the Conventional Controller.
4.2.1
Front Panel
The front panel of the Conventional Controller is provided with the control, alarm and operational
features shown in Figure 26 and described in the following subsections.
Figure 26 Front view of the Conventional Controller
Visual indicators
A 4.5 digit red LED readout to display the system current and voltage, and 18 LEDs to display the
alarm conditions as described in Table 32. All alarm conditions are also displayed by a red incan-
descent cabinet alarm lamp.
Table 32
Visual indicators
Designation
Description
Color
RECT FAN
Rectifier Fan Failure
yellow
EQL
Equalize On
yellow
FA
Fuse Failure Alarm (Internal to the Controller)
red
DFA
Discharge Fuse Alarm
red
CFA (not used)
Charge Fuse Alarm
red
RFA MIN
Rectifier Failure Alarm Minor
yellow
RFA MAJ
Rectifier Failure Alarm Major
red
ACO
Alarm cut-off
red
HVSD
High Voltage Shutdown Alarm
red
HV
High Voltage Alarm
red
LV
Low Voltage Alarm
red
HF
High Float Alarm
yellow
LF
Low Float Alarm
yellow
LVD
Low Voltage Disconnect
red
BOD
Battery On Discharge
red
LOP
Loss of Phase
red
AUX 1 (BDA)
Auxiliary Major
red
AUX 2
Auxiliary Minor
yellow