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Huawei / Outdoor power systems

Huawei TP48400C 2.1m Outdoor Power Cabinet Equipment information & support

Huawei TP48400C is a 2.1m high-integration outdoor integrated DC telecom power cabinet delivering -48V 400A nominal output. Featuring IP55 ingress protection and independent dual-compartment thermal regulation, it provides resilient continuous power for outdoor 5G/4G macro sites, transmission nodes, and edge telecom infrastructures.

Equipment information

Brand
Huawei
Equipment model
Huawei TP48400C 2.1m Outdoor Power Cabinet
Equipment type
Outdoor power systems
Controller / software version
Confirm against the installed equipment
View full product specifications
Huawei TP48400C 2.1m Outdoor Telecom Power Cabinet System -48V 400A IP55

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

Cabinet Dimensions & Type
2.1m Outdoor Dual-Door Integrated Enclosure (IP55 Rated)
System Output Capacity
400A (-48V DC) Nominal DC Distribution Output
Rectifier Configuration
8 Slots (Equipped with Huawei R4850G2 50A 96% HE Rectifiers)
Zoned Cooling Tech
Heat Exchanger for Equipment Bay + TEC/Direct Air for Battery Bay
Controller System
SMU02C Controller with LCD & Centralized Remote Web/SNMP Management
Surge Protection
AC Class C 20kA / 40kA Surge Protective Device (SPD)

Alarms & troubleshooting

AC_FAIL (Mains Failure / Phase Loss)
SMU ALM indicator solid red; Rectifier RUN indicator off, ALM indicator solid red
Utility grid blackout, AC input circuit breaker tripped, upstream breaker tripped due to AC PDU short circuit, or input voltage below 85 VAC.
1. Measure AC input terminal voltages (phase-to-phase and phase-to-neutral) using a digital multimeter; 2. Inspect and reset tripped cabinet AC input MCBs and upstream ATS/mains switchgear; 3. If grid power is normal but rectifiers remain off, verify whether the AC SPD module is shorted and replace if necessary.
DC_LOW_VOLT (DC Bus Undervoltage & LLVD Triggered)
SMU ALM indicator solid red with audible buzzer; LLVD DC contactor mechanically released/open
Prolonged mains outage discharging batteries below protection threshold (default -47.0 VDC for LLVD, -43.2 VDC for BLVD), or all rectifier modules faulted simultaneously.
1. Deploy emergency mobile generator to power AC inputs and initiate battery recharge; 2. Check SMU LCD/WebUI to verify DC bus voltage and LLVD/BLVD contactor state; 3. If AC is restored but contactors fail to latch, execute manual contactor close command via SMU Maintenance menu and verify voltage parameter thresholds.
RECT_COMM_FAIL (Rectifier CAN Bus Communication Failure)
SMU ALM indicator solid yellow; Faulty rectifier ALM indicator blinking yellow (0.5 Hz), RUN solid green
Poor contact of rectifier backplane gold-finger connectors, loose CAN bus flat cables, missing CAN termination resistor, or damaged internal MCU CAN transceiver.
1. Loosen latch handle, pull out faulty rectifier by 5 cm, wait 10 seconds, then re-insert firmly and lock latch; 2. If alarm persists, swap module to an adjacent functional slot to isolate backplane vs. rectifier fault; 3. Inspect SMU backplane ribbon cable integrity and verify CAN bus termination resistance.
CAB_TEMP_HIGH (Cabinet Over-Temperature & Thermal Subsystem Fault)
SMU ALM indicator solid red; Cabinet door Heat Exchanger / Air Conditioner TCU ALM indicator solid red
Cabinet door heat exchanger/air conditioner internal/external fan locked, dust filters clogged blocking airflow, degraded door rubber seals, or ambient temperature exceeding 50°C.
1. Remove and clean cabinet air filters and remove obstructions from vents; 2. Check fuse and DC power supply on door thermal control board (TCU), manually spin fan impellers to verify smooth rotation; 3. Calibrate PT100/NTC cabinet temperature sensors via SMU sensor diagnostic menu.
SPD_FAIL (Surge Protective Device Failure)
SMU ALM indicator solid yellow; AC/DC SPD module mechanical fault window turns from green to red
Lightning surge transient triggered thermal disconnection of internal MOVs, or SPD remote signaling dry contact cable is loose/disconnected.
1. Inspect AC PDU SPD status windows to identify which phase module has tripped red; 2. Hot-swap the damaged plug-in surge cartridge with an identical Huawei-rated replacement part; 3. Test dry contact signal wires using a multimeter to confirm circuit closure and secure cable terminals.

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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