lee@ricewind.comTel+86 17621197907Serving 50+ countries
RICEWIND

Huawei / Indoor power systems

Huawei ETP4830-A1 Equipment information & support

The Huawei ETP4830-A1 is a compact 1U 19-inch rack-mounted embedded DC power supply system designed for space-constrained telecom applications. It integrates two rectifier slots accommodating R4815N1 or high-efficiency R4815G1 modules to convert an ultra-wide AC input (85V to 300V AC) into stable -48V DC (nominal -53.5V DC) with a total system capacity of 30A, achieving up to 96% conversion efficiency alongside integrated distribution and SMU01C monitoring.

Equipment information

Brand
Huawei
Equipment model
Huawei ETP4830-A1
Equipment type
Indoor power systems
Controller / software version
Confirm against the installed equipment
View full product specifications
Huawei ETP4830-A1 1U Embedded Telecom Power System (30A -48V DC / 2x R4815 Slots / SMU01C) Official Studio Photo 1

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

System Output Capacity
30A (-48V DC)
AC Input Voltage Range
85V AC ~ 300V AC
Physical Form Factor
1U 19-inch Rack-Mounted Embedded
System Monitoring Controller
SMU01C / SMU01B Controller Unit
Rectifier Module Slots
2 Slots (Supports R4815N1 / R4815G1)
Power Conversion Efficiency
≥ 96%

Alarms & troubleshooting

AC_FAIL (AC Mains Failure / Abnormal)
SMU controller: ALM LED solid red; Rectifier module: Power LED off, Fault LED solid red.
Mains grid blackout, upstream AC circuit breaker tripped, or AC input voltage dropped below 85V AC.
1. Measure AC phase-to-neutral voltage at the ETP4830 AC input terminals using a true-RMS multimeter. 2. Verify upstream AC distribution breaker status and ensure grid power is restored. 3. Inspect the rear AC input terminal block for loose wiring, improper torque, or thermal damage.
DC_LOW_VOLT (DC Bus Under-Voltage & LLVD)
SMU controller: ALM LED solid red; LLVD contactor released/open.
Prolonged AC outage causing deep battery discharge below the DC undervoltage threshold (default -45V DC) or LLVD cutoff threshold (-43.2V DC).
1. Verify AC power recovery status; connect a portable emergency generator if mains is unavailable. 2. Query the SMU LCD/WebUI to inspect battery terminal voltage and total output load current. 3. Once AC input is restored, confirm rectifiers restart, execute battery equalized charging, and ensure the LLVD contactor automatically reconnects.
REC_HVSD (Rectifier Output Overvoltage Hardware Shutdown)
Faulty rectifier module: Power LED off, Alarm LED off, Fault LED solid red.
Internal rectifier feedback control loop failure or voltage sampling fault causing DC output to exceed the 59.5V DC hardware shutdown threshold.
1. Remove the faulted rectifier module from the subrack, wait 30 seconds to discharge internal caps, then re-insert to clear the lockout latch. 2. If the red Fault LED illuminates immediately upon insertion, the internal power stage is damaged. 3. Hot-swap the damaged unit with an identical spare (e.g., R4815N1/R4815G1) and verify current-sharing balance via SMU.
REC_OVER_TEMP (Rectifier Over-Temperature Derating / Thermal Shutdown)
Rectifier module: Alarm LED (yellow) solid on or blinking; turns solid red and shuts down if critical threshold is reached.
Ambient operating temperature exceeds 65°C, front/rear air vents of the ETP4830 subrack are clogged with dust, or the internal cooling fan failed.
1. Inspect site air conditioning and cabinet ventilation to ensure intake air temperature is within operating limits (-40°C to +65°C). 2. Clean front air inlet grilles and rear exhaust areas of the ETP4830 subrack to remove accumulated dust. 3. Check fan rotation; if the internal brushless fan is seized or not spinning under thermal load, hot-swap the rectifier module.
CAN_COMM_FAIL (SMU to Rectifier CAN Bus Communication Failure)
SMU controller: ALM LED steady or blinking yellow; Rectifier module: Run LED (green) flashes slowly at 1 Hz.
Poor edge-connector seating on backplane, bent backplane CAN-bus pins, SMU controller communication lockup, or unlatched module.
1. Release the rectifier latch handle, withdraw the module, inspect backplane connector pins for bends or oxidation, re-seat firmly, and lock the latch. 2. Perform a software reboot on the SMU via keypad/LCD, or reseat the SMU controller module for a hardware reboot. 3. Swap the affected rectifier into an adjacent empty slot; if the alarm follows the module, replace the rectifier. If the slot remains unresponsive, inspect/replace the SMU or backplane.

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

Share on-site information

  1. 01

    Identify the exact model

    Record the nameplate, system model and controller or module model.

  2. 02

    Keep the alarm details

    Record the full alarm text, indicator colour, timing and whether it persists.

  3. 03

    Describe recent changes

    Note recent replacements, software updates or configuration changes.

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.

Your model and these details will be added to the enquiry form for you to review before sending.

Related technical articles

Browse the technical guides or send a question about this model.

View all articles

Need a replacement module or supporting equipment?

Confirm the full model, system configuration and compatibility requirements before enquiring about suitable products.

Ask about suitable products

Have a model and an on-site issue?

Share the exact model, alarm text and observed symptoms to help identify relevant information and compatibility requirements.

Request technical support