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5.15 LCD (Liquid Crystal Display) Functions
The 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 and the
audible alarms for total system monitoring. The LCD displays certain information only on
specific lines of the display. The UPS operating mode and conditions determines the
information shown. These messages are shown in the following line message charts.
5.15.1 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 Translation
- UPS 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 abnormality exists.
- BATTERY DISCHARGE -
Displayed during abnormal Utility occurrences;
inverter is supplying power from batteries. (UPS
shuts down after V (min.) is reached.
- OUTPUT SHUTDOWN -
Displayed during power failure if V (min.) is
reached, 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.
5.15.2 Line-2 System Fault Messages
Line-2 fault messages are automatically displayed when a system fault is detected.
LINE-2 MESSAGES
Display Message Translation
DCOC DC Over-current
DCUB DC Unbalanced
DCOV DC Over-voltage
OH Overheat (internal)
OL Output Overload
VOUV Inverter Under-voltage
VOOV Inverter Over-voltage
5.15.3 Line-3 System Messages
Line–3 messages show load current information, and user selected instructions.