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Vertiv / Power management

NetSure 212 C23-S2 Equipment information & support

The NetSure 212 C23-S2 is a 2U, 19-inch rack-mounted -48VDC subrack power system engineered to deliver up to 120A output using high-efficiency hot-swappable rectifiers and an advanced controller.

Equipment information

Brand
Vertiv
Equipment model
NetSure 212 C23-S2
Equipment type
Power management
Controller / software version
Confirm against the installed equipment
View full product specifications
Vertiv NetSure 212 C23-S2 Official White Background Photo View 1

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

AC Input Voltage Range
85VAC ~ 300VAC (Nominal 220VAC) VAC
Smart Monitoring Controller
M225S / NCU Smart Controller
Cooling Method
Temperature-controlled Forced Air Cooling
Nominal Output Voltage
-48VDC VDC
Rated Output Current
120A (System Capacity 5.8kW)
Managed Rectifier Capacity
3 Slots for R48-2000e3 Rectifier Modules

Alarms & troubleshooting

AC_FAIL
Controller Major/Critical LED solid RED/AMBER, Rectifier green Power LEDs OFF
Complete utility AC mains outage, upstream AC distribution breaker trip, or AC input voltage dropping below 85VAC or surging above 300VAC triggering hardware protection.
1. Measure phase-to-neutral/phase-to-phase voltages at the AC input terminal block using a True-RMS multimeter; 2. Inspect the upstream breaker status in the distribution box; 3. Verify automatic transfer switch (ATS) engagement to backup generators if applicable; 4. Monitor battery discharge current and remaining reserve time on the controller screen.
DC_UNDER_VOLT
Controller CRITICAL RED LED flashing rapidly, buzzer sounds continuous alert
Extended utility outage leading to critical battery exhaustion; busbar voltage has dropped below the low DC warning threshold (typically < 45.5V) and is approaching LLVD/BLVD cutoff.
1. Connect a portable emergency generator to the AC input immediately; 2. Verify that non-essential loads have been successfully shed via the LLVD contactor; 3. If AC power cannot be restored promptly, ensure critical transmission network elements safeguard configurations prior to BLVD total shutdown; 4. Limit battery recharge current to 0.1C–0.15C after recovery.
RECT_FAIL
Rectifier Protection/Fault LED solid YELLOW or RED, controller reports MAJOR alarm
Internal PFC/DC-DC stage hardware failure, cooling fan stall/lockup, internal thermal protection (> 75°C), or output over-voltage hardware shutdown latch.
1. Check if the rectifier fan is rotating and clear any dust or blockage on the front air grille; 2. Read specific sub-fault logs (overtemp, fan lock, overvoltage) on the M221S controller; 3. Unlock the handle, withdraw the module halfway for 30 seconds to power-cycle, then reseat firmly; 4. If the red fault LED persists after internal self-test, replace with a spare rectifier.
BATT_TEMP_HIGH
Controller WARNING/MAJOR YELLOW LED illuminates
Battery surface or ambient temperature exceeding safety limits (typically configured at > 45°C or > 50°C), shelter air conditioning failure, or initial onset of battery thermal runaway.
1. Inspect enclosure/shelter air conditioning and heat exchangers for operational faults; 2. Check battery float charging current on the controller; if current exceeds 0.05C during continuous float with high heat, open the battery breaker immediately to halt thermal runaway; 3. Scan each cell using an infrared thermal imager to identify single shorted cells; 4. Verify physical temperature sensor placement and wiring continuity.
FUSE_BLOW
Controller CRITICAL RED LED solid ON, distribution trip indicator active
A DC branch circuit breaker (MCB) has tripped, a distribution fuse has blown due to downstream short-circuit/overload, or auxiliary status detection wiring has loosened.
1. Identify the specific tripped branch circuit number on the controller screen (load or battery distribution); 2. Visually verify the tripped breaker handle or blown fuse indicator on the 2U front panel; 3. Measure load loop resistance using a multimeter to clear short circuits or ground faults on load equipment and feeder cables; 4. Do not reclose breaker without isolating faults; restore the breaker or install an identical fuse once verified.

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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