Vertiv M830D - Page 67

NetSure
™
Control Unit (NCU)
User Manual, UM1M830BNA
Spec. No: 1M830BNA, 1M830DNA Code: UM1M830BNA
Model No: M830B, M830D Revision M, May 12, 2017
[57]
Table 5
Alarm Name
Alarm Description
Action to Correct
LVD Unit Alarms (Low voltage disconnect must be present in system)
LVD 1 Disconnect
LVD1 contactor is in disconnect mode.
--
LVD 2 Disconnect
LVD2 contactor is in disconnect mode.
--
LVD 1 Fail
LVD1 contactor has failed.
Check the contactor functions. Replace the
contactor.
LVD 2 Fail
LVD2 contactor has failed.
LVD3 Unit Alarms
LVD 3 Disconnect
LVD3 contactor is in disconnect mode.
--
LVD 3 Fail
LVD3 contactor has failed.
Check the contactor functions. Replace the
contactor.
SMDU LVD Alarms (SM-DU Module must be present in system)
LVD 1 Disconnect
LVD1 contactor is in disconnect mode.
--
LVD 2 Disconnect
LVD2 contactor is in disconnect mode.
--
LVD 1 Contactor Fail
LVD1 contactor has failed.
Check the contactor functions. Replace the
contactor.
LVD 2 Contactor Fail
LVD2 contactor has failed.
Large DU LVD Alarms (Large Distribution Unit must be present in system)
LVD1 Disconnected
LVD1 contactor is in disconnect mode.
--
LVD2 Disconnected
LVD2 contactor is in disconnect mode.
--
Rectifier AC Alarms
Line AB Over Voltage 1
Voltage between Line A and Line B is higher
than the High Line Voltage AB Alarm
threshold.
Check why voltage is high.
Line AB Over Voltage 2
Voltage between Line A and Line B is higher
than the Very High Line Voltage AB Alarm
threshold.
Line AB Under Voltage 1
Voltage between Line A and Line B is lower
than the Low Line Voltage AB Alarm
threshold.
Check why voltage is low.
Line AB Under Voltage 2
Voltage between Line A and Line B is lower
than the Very Low Line Voltage AB Alarm
threshold.
Line BC Over Voltage 1
Voltage between Line B and Line C is higher
than the High Line Voltage BC Alarm
threshold.
Check why voltage is high.
Line BC Over Voltage 2
Voltage between Line B and Line C is higher
than the Very High Line Voltage BC Alarm
threshold.
Line BC Under Voltage 1
Voltage between Line B and Line C is lower
than the Low Line Voltage BC Alarm
threshold.
Check why voltage is low.
Line BC Under Voltage 2
Voltage between Line B and Line C is lower
than the Very Low Line Voltage BC Alarm
threshold.