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

Huawei / DC power systems

R4815G1 Equipment information & support

The Huawei R4815G1 is a miniature digital AC/DC rectifier converting 85VAC~300VAC input to stabilized -48V DC, optimized for distributed radio systems and compact pole-mounted power enclosures.

Equipment information

Brand
Huawei
Equipment model
R4815G1
Equipment type
DC power systems
Controller / software version
Confirm against the installed equipment
View full product specifications
Huawei R4815G1 Official Product View 1

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

Nominal DC Output Voltage
-48 V DC
Rated Output Current
15 A
Power Conversion Efficiency
96.0 %
Physical Dimensions Spec
40.8 × 105 × 281 mm
AC Input Voltage Range
85 ~ 300 V AC
Operating Temperature
-40 ~ +75 °C

Alarms & troubleshooting

AC_IN_FAIL (AC Input Abnormal/Failure)
Green Run LED OFF, Amber Alarm LED Solid ON, Red Fault LED OFF
Mains grid blackout, loose AC input L/N wiring, or AC voltage below 85 VAC (undervoltage) or above 300 VAC (overvoltage) operating limit.
1. Measure AC input terminals using a true-RMS digital multimeter (normal range: 85 VAC to 300 VAC). 2. Check if the upstream AC circuit breaker (MCB) feeding this rectifier slot has tripped; reset if cleared. 3. Reseat the R4815G1 module and inspect the rear blind-mate connector pins for physical damage or arcing.
OUT_OVP_LOCK (DC Output Overvoltage Lockout)
Green Run LED OFF, Amber Alarm LED OFF, Red Fault LED Solid ON
Internal voltage feedback loop failure, DC/DC PWM regulation fault, or bus voltage exceeding hardware protection threshold (59.5 VDC) causing locked shutdown.
1. Disconnect module by pulling it out to cut AC power; wait 30 seconds for internal capacitors to discharge completely, then reinsert to reset. 2. If the red fault LED persists immediately upon insertion, verify the float/equalize voltage setpoints on the SMU controller. 3. Replace the faulty R4815G1 with a verified spare module; return defective unit for board-level repair.
TEMP_OVER (Over-Temperature / Thermal Derating)
Green Run LED Solid/Blinking, Amber Alarm LED Solid ON, Red Fault LED OFF
Ambient temperature exceeding 55°C, clogged subrack air dust filters, or blocked front/rear air intake/exhaust causing heatsink temperature to exceed safety threshold.
1. Verify telecom equipment room HVAC operation and bring ambient room temperature down to 20°C–25°C. 2. Clean or replace dirty dust mesh filters in the power cabinet; remove any obstructions from front and rear chassis vents. 3. Check real-time temperature logs via the SMU controller; confirm the module clears the derating condition once the heatsink cools down.
FAN_FAIL (Rectifier Fan Blocked / Failure)
Green Run LED OFF, Red Fault LED Blinking at 0.5Hz, Amber Alarm LED Solid ON
Internal brushless DC fan mechanically seized by debris, worn bearing, or severed fan tachometer/PWM control wire causing rotational speed to fall below safety limits.
1. Visually inspect the front fan grill of the R4815G1 for debris, cables, or foreign objects obstructing blade rotation. 2. Disconnect module and use clean compressed air/ESD brush to remove accumulated particulate build-up around the fan hub. 3. If the fan spins freely by hand but fails to spin upon power-up, replace the fan assembly or swap the entire module.
CAN_COMM_FAIL (CAN-bus Comm Failure / Current Share Fault)
Amber Alarm LED Blinking at 0.5Hz, Green Run LED Solid ON, Red Fault LED OFF
Poor contact on backplane CAN-bus pins, faulty SMU communication port, bus termination resistor mismatch, or severe current-sharing imbalance (>±1.5A) between parallel modules.
1. Access the SMU monitoring panel and check whether the rectifier is detected with a valid slot ID and telemetry link. 2. Firmly reseat the module into its subrack slot to ensure positive engagement of the rear CAN communication pins. 3. Measure termination resistance between CAN_H and CAN_L lines with power isolated (nominal is ~60 ohms); if abnormal, replace the SMU or backplane board.

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