TOSHIBA
26
6.9
Liquid Crystal Display (LCD) Functions
The liquid crystal display (LCD) screen is a 4-line by 20-character wide display. The LCD
display contains information about the operation of the UPS. It should be used in conjunction
with the LED display (see Section 6.8) and the audible alarms (see Section 6.7) for total
system monitoring. The LCD displays certain information only on specific lines of the display.
This information is determined by the UPS operating mode and conditions. These messages
are shown in the following line message charts.
6.9.1 Line-1 System Messages
Line-1 messages are based on the operating mode. The following chart shows all
allowable Line-1 messages, which occur while starting up and while in main monitor
(
MONI) screen mode.
LINE-1 MESSAGES
Display Message
Meaning
- START UP -
Displayed when UPS is in the start-up condition
or display board is resetting.
- BYPASS OPERATION -
Displayed when the UPS is in Bypass
Operation.
- UPS ON-LINE -
Displayed when the inverter is running, and no
Utility abnormal exists.
- BATTERY DISCHARGE -
Displayed during Utility abnormal; inverter is
supplying power from batteries. (Unit shuts
down after V (min.) is reached.
- OUTPUT SHUTDOWN -
Displayed during power failure if V (min.) is
reached, or an EPO is received, or after
completion of Start-Up Sequence of the Inverter
and Bypass is not available.
- BATTERY BACKUP -
Displayed during input power failure.
6.9.2 Line-2 System Fault Messages
Line-2 fault messages are automatically displayed when a system fault is detected.
LINE-2 MESSAGES
Display Message
Meaning
DCUV
DC Under-voltage
DCOC
DC Over-current
DCUB
DC Unbalanced
DCOV
DC Over-voltage
EERR
Main EEPROM error
OH
Overheat (internal)
OL
Output Overload
IVUV
Inverter Under-voltage
IVOV
Inverter Over-voltage
6.9.3 Line-3 System Messages
Line–3 messages show load current information, and user selected instructions.