1800 Series User Manual
31
Warnings (cont.)
Description and Resolution
The input frequency is outside
specied limits. If the unit was online
when the warning occurred it will
transfer to battery backup. After the
backup the output will shutdown. If
the unit was in bypass the output will
be turned off. The unit will return to
normal operation if input frequency
returns to within specied limits.
The connected load exceeds the
UPS power rating. Reduce the
load attached to the UPS. The unit
will automatically return to normal
when the load is reduced within the
allowable time limit. If the load is
not reduced, the output will be shut
down. (Details see Appendix B.)
= Flashing LED = LED lit continuously
Note 1: If any of these warnings occur while the UPS is in online mode it will immediately transfer to backup mode. In this case
the percentage LED’s will be used to show the battery power status. To identify the cause of the warning listen to the number of
consecutive beeps. One beep indicates an input undervoltage, two beeps means input overvoltage, three beeps is a frequency
problem.
Alarm State
Alarm will
sound for 3
1/2-second
beeps at
10-second
intervals.
Alarm will
sound for 1
second at
15-second
intervals.
LED State
Warning/Fault Flash
60% Flash
Warning/Fault Flash
150% Flash
Display State
Warning
Input
Frequency
Regulation
(see Note 1)
Output
Overload
