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Vertiv / DC power systems

NetSure 701 A41-S10 Equipment information & support

The Vertiv NetSure 701 A41-S10 is a highly integrated 6U 19-inch rack-mount -48V DC embedded power system delivering up to 200A output, engineered with 4 rectifier slots compatible with R48-2900U/R48-3200e modules, an M221S/M222S controller, and intelligent battery management for enterprise and carrier-grade infrastructure.

Equipment information

Brand
Vertiv
Equipment model
NetSure 701 A41-S10
Equipment type
DC power systems
Controller / software version
Confirm against the installed equipment
View full product specifications
Vertiv NetSure 701 A41-S10 6U 19-Inch Rack-Mount 200A -48V DC Embedded Telecom Power System Official Studio Photo 1

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

Physical Form Factor
6U 19-inch Standard Subrack Chassis
DC Distribution Branches
Input: 1×125A/2P + Output: 1×16A/1P + Battery: 2×125A
AC Input Voltage Range
85V AC ~ 300V AC (Nominal 220V AC)
Operating Temperature
-40°C to +65°C
System Comprehensive Efficiency
≥ 96% (Gold Standard Efficiency)
System Output Capacity
200A (-48V DC)

Alarms & troubleshooting

AC_FAIL (AC Mains Failure / Phase Loss)
Controller Alarm LED steady red; Rectifier Power LED off, Protection LED steady yellow
Upstream grid blackout, AC input breaker tripped, phase loss, or AC voltage below 85VAC operating threshold.
1. Measure phase-to-neutral and phase-to-phase voltages at the ACDU input terminals using a true-RMS multimeter. 2. Inspect the AC input circuit breaker and upstream ATS status; re-engage if tripped. 3. If input voltage is verified within spec (85-290VAC), reseat the rectifier module to rule out loose backplane connector pins.
DC_HVSD (DC High Voltage Shutdown Lockout)
Rectifier Fault LED steady red, Power LED off; Controller displays Rectifier HVSD alarm
Internal voltage feedback loop failure, shorted power semiconductor, or bus voltage exceeding HVSD threshold (default 59.5VDC).
1. Verify overvoltage threshold settings in the NCU/M830B controller (typically set between 59.0VDC and 60.0VDC). 2. Unseat the faulted module, wait 3 minutes for internal DC-bus capacitors to fully discharge, and reinsert to reset. 3. If the module trips into HVSD immediately upon re-insertion, internal hardware is compromised; replace the module.
RECT_OT (Rectifier Over-Temperature Shutdown)
Rectifier Protection LED steady yellow; Controller displays Rectifier Over Temperature
Ambient temperature exceeding 55°C, clogged cabinet air intake filters, obstructed exhaust channel, or heavy heatsink dust accumulation.
1. Check the HVAC system to ensure ambient telecom room temperature is within 20°C-25°C. 2. Clean or replace the cabinet front door dust filters; ensure the rear hot-aisle exhaust is unobstructed. 3. Extract the module and use dry compressed air to clear heatsink channels; the unit will auto-recover once internal temperature falls below threshold.
FAN_FAIL (Rectifier Fan Blocked / Tachometer Fault)
Rectifier Protection LED steady yellow; Controller logs Rectifier Fan Failure alarm
Physical debris jamming fan blades, mechanical bearing seizure, disconnected tachometer feedback pin, or burnt fan driver circuitry.
1. Visually inspect the front grille of the module for external objects (labels, cable ties) impeding blade rotation. 2. Disengage module and spin fan blades manually with a clean probe to detect friction or mechanical seizure. 3. Inspect the internal fan terminal block connector; if connections are sound but fan fails to spin under power, replace the fan assembly or module.
CAN_COMM_FAIL (CAN-bus Communication Failure / Offline)
Rectifier Protection LED blinking yellow (0.5Hz); Controller displays module offline / Comm Fail
CAN-bus cable discontinuity, bent backplane connector pins, missing/damaged 120-ohm termination resistor, or failed transceiver IC.
1. Reseat the module and inspect gold fingers and backplane mating pins for physical bending, displacement, or debris. 2. Power down the system bus and measure resistance across CAN_H and CAN_L with a multimeter; standard value is ~60 ohms (two 120-ohm termination resistors in parallel). 3. Verify flat ribbon/RJ45 cables between backplane and NCU/M830B controller; swap module slot to identify if issue is backplane- or module-specific.

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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