Vertiv NetSure 700NVBA - Page 44

Vertiv | +24 VDC Power System User Manual (Section 6013) | Rev. G
44
Table 1: MCA Controls and Indicators (cont'd from previous page, cont'd on next page)
MAJOR
(Indicator)
Flashes red if any condition listed below occurs.
• AC fail on two or more Rectifier Modules.
• Rectifier Module fail alarm activates on two or more Rectifier Modules.
• Battery on discharge alarm activates.
• 50% battery on discharge (very low voltage) alarm activates.
• High voltage 1 alarm activates.
• High voltage 2 alarm activates.
• High battery ambient temperature alarm activates (if battery charge
digital temperature compensation probe installed).
• Low battery ambient temperature alarm activates (if battery charge
digital temperature compensation probe installed).
• Digital temperature compensation probe failure (if battery charge
digital temperature compensation probe installed).
• Rectifier Module emergency shutdown or fire alarm disconnect signal
applied to system.
• Both redundant low voltage disconnect circuits activate to disconnect
a load (if LVD installed).
• Subsystem low voltage alarm activates.
• Subsystem high voltage alarm activates.
• Subsystem major alarm activates.
• One of the following causes an MCA failure:
MCA circuit card failure.
MCA "system" fuse open.
No system voltage detected.
No subsystem voltage detected.
LVD communications lost, LVD circuit card failure, or LVD
communications link to MCA broken (if LVD installed).
• If any system or subsystem fuse or circuit breaker opens.