Vertiv / DC Power Systems (-48V)

R48-3200e Equipment information & support

The Vertiv R48-3200e is a high-power-density digital telecom rectifier converting single-phase AC to high-precision -48V DC, engineered for extreme reliability in enterprise data hubs and 5G network centers.

Equipment information

Brand: Vertiv
Equipment model: R48-3200e
Equipment type: DC Power Systems (-48V)
Controller / software version: Confirm against the installed equipment

View full product specifications

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

Rated Output Power: 3200W (59.3A @ 54V)
Power Conversion Efficiency: ≥ 96.2%
Overall System Efficiency: Up to 96.2% (Gold Standard)
Ingress Protection Rating: IP20 (Indoor Dust & Finger Proof)
Acoustic Noise: ≤ 55 dBA (at 25°C ambient load)
Dielectric Withstand Voltage: 3000VAC Input to Ground (< 5mA)

Alarms & troubleshooting

DC_OVP_LOCK (DC Output Overvoltage Lockout)

Power LED (Green) OFF, Fault LED (Red) Solid ON

Internal feedback loop malfunction or external surge causing DC bus voltage to exceed hardware threshold (>59.5V), triggering HVSD lockout

1. Unseat the rectifier from the shelf and wait 3 minutes for bus capacitors to discharge; 2. Verify system controller overvoltage settings match module specifications; 3. Re-seat module and monitor DC bus; replace rectifier if lockout reoccurs immediately.

AC_IN_FAIL (AC Mains Input Abnormal/Fail)

Power LED (Green) OFF, Protection LED (Yellow) Solid ON, Fault LED (Red) OFF

Mains grid outage, tripped input AC breaker, or line voltage outside operating limits (85VAC to 300VAC)

1. Measure AC voltage at the shelf backplane input terminals (nominal 85VAC–300VAC); 2. Check and reset corresponding AC feed circuit breaker on the ACDU panel; 3. Inspect module rear connector pins for thermal damage, arcing, or physical displacement.

OVER_TEMP (Module Thermal Derating / Shutdown)

Derating: Green and Yellow LEDs Solid ON; Thermal Shutdown: Green OFF, Yellow LED Solid ON

Ambient temperature exceeding +65°C, HVAC cooling failure, blocked front/rear air vents, or severe internal dust buildup

1. Inspect site HVAC system and verify ambient intake temperature is within -40°C to +75°C; 2. Clear dust and obstructions from front intake grilles and rear exhaust areas; 3. Clean internal heatsinks using low-pressure dry air; replace module if temperature sensor is defective.

FAN_FAIL (Cooling Fan Locked Rotor / Failure)

Power LED (Green) Flashing, Fault LED (Red) Solid ON

Mechanical obstruction in fan blades, failure of the internal fan driver circuit, or loss of tachometer feedback

1. Visually check fan intake for foreign objects; with power off, verify the fan spins freely by hand; 2. Reseat the module and verify if the fan spins at full speed during initial POST sequence; 3. If the fan remains stationary or alarm persists, replace the fan assembly or swap the rectifier.

CAN_COMM_FAIL (CAN-bus Communication Loss & Current Sharing Fault)

Power LED (Green) Solid ON, Protection LED (Yellow) Slow Flashing (0.5Hz)

CAN-H/CAN-L differential line open-circuit between module and supervisory controller (e.g., M530S/M830B), dirty gold finger pins, or missing 120Ω bus terminator

1. Access controller web/local GUI and check whether the rectifier ID is missing or in conflict; 2. Unseat rectifier, clean the backplane communication pins with contact cleaner, and firmly reseat; 3. Measure CAN bus resistance between CAN-H and CAN-L across shelf (should measure ~60Ω with both 120Ω terminators active).

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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Record information visible in the existing interface. Electrical measurements, disassembly and replacement should follow the applicable manufacturer's manual and be performed by qualified personnel.