Vertiv Netsure - Page 53

NetSure
™
Control Unit (NCU)
User Manual, UM1M830BNA
Spec. No: 1M830BNA, 1M830DNA Code: UM1M830BNA
Model No: M830B, M830D Revision M, May 12, 2017
[43]
Table 5
Alarm Name
Alarm Description
Action to Correct
Under Voltage 1 (24V)
Output voltage is lower than the Under
Voltage 1 Alarm threshold.
Check why system voltage is low. If there is a
mains failure, check if some load could be
switched off in order to prolong the
operating time of the plant. If the system
load is too high related to rectifier capacity,
install additional rectifiers. If the batteries
are being recharged, the alarm will cease by
itself when battery voltage has increased to
the charging level.
Under Voltage 2 (24V)
Output voltage is lower than the Under
Voltage 2 Alarm threshold.
Diesel Run Over Temp
Diesel generator run over temperature
alarm.
Check diesel generator.
DG1 is Running
Diesel generator 1 is running.
--
DG2 is Running
Diesel generator 2 is running.
--
Hybrid is High Load
Diesel generator high load alarm.
Check load on diesel generator.
DG1 Failure
Diesel generator 1 has failed.
Check diesel generator.
DG2 Failure
Diesel generator 2 has failed.
Check diesel generator.
Grid is on
AC is on grid.
--
Ambient Temp High 1
High diesel generator ambient temperature
alarm1.
Check why temperature is high or low.
Ambient Temp Low
Low diesel generator ambient temperature
alarm.
Ambient Temp High 2
High diesel generator ambient temperature
alarm2.
Ambient Sensor Fail
Ambient temperature sensor failure.
Replace temperature sensor.
IB Communication Fail
NCU Interface Board communications
failure.
Check communications cables.
Relay Test
Relay Test in progress.
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