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Vertiv / Site energy systems

NetSure 700 C41 Equipment information & support

The Vertiv NetSure 700 C41 is a robust 6U 19-inch rack-mount embedded DC power system delivering 300A at -48VDC across 6 rectifier positions, integrated with comprehensive AC/DC distribution breakers and smart battery health management.

Equipment information

Brand
Vertiv
Equipment model
NetSure 700 C41
Equipment type
Site energy systems
Controller / software version
Confirm against the installed equipment
View full product specifications
NetSure 700 C41 Official Product View 2

Information below comes from the current product catalogue. Confirm the controller, software version and configuration of the installed equipment separately.

System Output Capacity
300 A
Nominal Output Voltage
-48 VDC
Output Voltage Range
-42 ~ -58 VDC
AC Input Voltage Range
85 ~ 300 VAC (three-phase/single-phase)
Rectifier Module Slots
6 Slots (Supports R48-2000e3 / R48-3200e)
System Monitoring Controller
M522B / M521B Controller Unit

Alarms & troubleshooting

AC_FAIL (AC Mains Failure / Phase Loss)
Controller Alarm LED red solid; Rectifier Power LED off, Protection LED yellow solid
Commercial grid blackout, AC input breaker tripped, AC voltage out of operational window (<85VAC or >290VAC), or phase loss
1. Measure phase and line-to-line voltages at AC distribution terminals using a DMM. 2. Inspect the upstream AC input breaker and ATS contactor status. 3. Reset the AC breaker once utility grid parameters stabilize within nominal limits.
RECT_HVSD (Rectifier DC High Voltage Shut Down)
Faulty rectifier Fault LED red solid; Controller Critical Alarm LED red solid with audible buzzer
Internal voltage regulation/PWM loop failure in the rectifier, or high external surge causing DC bus voltage to exceed the 59.5V hardware protection threshold
1. Unseat the alarmed rectifier module, disconnect AC, and wait 3 minutes to discharge internal bus capacitors. 2. Verify controller DC overvoltage setpoint (typically 58.5V). 3. Re-insert the module individually; if HVSD triggers again immediately, replace the rectifier.
CAN_COMM_FAIL (Rectifier CAN Bus Communication Failure)
Controller Alarm LED yellow solid; Target Rectifier Protection LED yellow blinking (0.5Hz)
Backplane CAN ribbon cable loose, missing 120-ohm termination resistor, module address collision, or faulty communication transceiver on the rectifier
1. Inspect RJ45/ribbon cables connecting the controller to the subrack backplane. 2. Measure resistance between CAN_H and CAN_L lines (nominal ~60 ohms unpowered). 3. Reseat the module; if communication fails to recover, replace the rectifier communication board or the module.
BLVD_ACT (Battery Low Voltage Disconnect Active)
Controller Critical red LED solid; contactor open status LED lit, continuous buzzer tone
Extended mains outage causing total battery capacity depletion; bus voltage dropped below the BLVD setpoint (typically 43.2V) to protect cells from permanent sulfation
1. Confirm emergency diesel generator has started and is supplying AC to the rectifiers. 2. Verify battery terminal voltages and breaker status. 3. Monitor DC bus recovery; once voltage exceeds the reconnect threshold (>48V), verify automatic contactor re-closure.
FAN_FAIL (Rectifier Fan Blocked / Tachometer Fault)
Faulty rectifier Protection LED yellow flashing or Fault LED red solid; Controller logs Minor/Major alarm
Mechanical bearing seizure, heavy dust buildup restricting airflow, loose internal fan power harness, or defective hall-effect tachometer circuit
1. Inspect front intake grille of the rectifier and clean accumulated dust. 2. Extract module and verify if fan blades rotate freely by hand. 3. Reapply power; if the fan does not spin or speed alarm persists, replace the fan assembly or rectifier module.

Access Complete Maintenance & Full Alarm Troubleshooting Manual

This page lists high-frequency critical alarm codes commonly encountered in field maintenance. Comprehensive manufacturer troubleshooting matrices, board-level repair guides, detailed electrical schematics, and firmware commissioning manuals are delivered alongside equipment upon formal project procurement, accompanied by dedicated FAE technical support.

Contact Account Manager for Full Manual

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