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Huawei / Indoor power systems

Huawei ETP48600-C5A8 Subrack Equipment information & support

The Huawei ETP48600-C5A8 is a flagship-tier 19-inch rack-mount embedded DC power system delivering up to 600A at -48VDC across 12 high-density rectifier positions, engineered with heavy-duty molded-case circuit breakers and an intelligent SMU02C supervision platform.

Equipment information

Brand
Huawei
Equipment model
Huawei ETP48600-C5A8 Subrack
Equipment type
Indoor power systems
Controller / software version
Confirm against the installed equipment
View full product specifications
Huawei ETP48600-C5A8 Subrack Official Product View 1

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

System Output Capacity
600 A
Nominal Output Voltage
-48 VDC
Output Voltage Range
-42 ~ -58 VDC
Rectifier Module Slots
12 slots (dual-layer high-density subrack, compatible with R4850G modules)
System Comprehensive Efficiency
> 96.2%
Physical Dimensions Spec
488 × 482 × 400 mm (11U 19-inch)

Alarms & troubleshooting

AC_FAIL (AC Mains Failure / Phase Loss)
SMU ALM LED solid red; all rectifier module POWER LEDs off, ALM LEDs solid yellow/red
Utility grid outage, AC input breaker tripped, AC voltage below 85 VAC, or input phase loss/floating neutral.
1. Measure phase-to-neutral and phase-to-phase voltages at the subrack AC input terminal block with a multimeter. 2. Inspect the upstream ATS, AC surge protection device (SPD), and input MCBs for trip or fault status. 3. If grid failure has occurred, verify whether standby diesel generator has started and transferred load correctly.
RECT_HVSD (Rectifier Output Overvoltage Hardware Lockout)
Faulty rectifier ALM LED solid red, RUN LED off; SMU controller displays Critical Alarm
Internal voltage control loop fault or surge breakdown causing module DC bus voltage to exceed hardware threshold (>59.5 VDC).
1. Identify the locked module slot ID via the SMU display menu, WebUI, or NetEco OSS. 2. Unseat the faulty rectifier from the slot, wait 3 minutes for internal DC link capacitors to discharge, then reseat it. 3. If the red LED re-latches immediately upon power-up, replace the faulty rectifier module (e.g., R4850G/R4875G).
LLVD_ACT (Load Low Voltage Disconnect Active)
SMU ALM LED flashing/solid red; subrack internal LLVD DC contactor physically tripped open
Prolonged AC power outage caused deep battery discharge below the configured LLVD threshold (typically 43.2V–44.0V DC).
1. Measure battery string and DC bus terminal voltages to verify if levels approach BLVD threshold. 2. Immediately connect mobile generator or restore AC grid to allow rectifiers to output DC power. 3. Verify that the SMU automatically recloses the contactor once the DC bus recovers above reconnect voltage; perform manual close via SMU menu if needed.
CAN_COMM_FAIL (Rectifier CAN Bus Communication Failure)
SMU ALM LED solid yellow; affected rectifier RUN green LED flashes rapidly at 4 Hz
Subrack backplane CAN pin deformation, incomplete module insertion, slot address conflict, or blown internal CAN transceiver chip.
1. Ensure the rectifier handle lock is firmly locked; pull out the module and inspect backplane CAN connector pins for damage. 2. Swap the module into an adjacent empty slot to isolate whether the failure follows the slot or the rectifier. 3. If failure persists in the same slot, inspect backplane ribbon cables; if failure follows the module, replace the rectifier module.
RECT_FAN_FAIL (Rectifier Fan Blocked / Tachometer Fault)
Rectifier ALM LED solid yellow; SMU reports fan fault, rectifier triggers power output derating
Air intake clogged with severe dust, foreign object jamming impeller blades, fan bearing seizure, or hall tachometer sensor failure.
1. Visually check through the front air grille of the faulty rectifier to see if the fan is stationary or blocked by foreign objects. 2. Extract the module, clean the cooling duct and impeller with dry compressed air, and manually spin blades to ensure smooth rotation. 3. Reinsert the module; if fan self-test fails to reach rated RPM within 1 minute and the ALM LED remains yellow, replace the fan assembly or 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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