Tel+86 17621197907Serving 56+ countries
RICEWIND

Huawei / DC Power Systems (-48V)

R4875G5 Equipment information & support

The Huawei R4875G5 represents a pinnacle of telecom power engineering, delivering 75A / 4000W output at an astounding 97% peak conversion efficiency in a standard 1U hot-swappable profile.

Equipment information

Brand
Huawei
Equipment model
R4875G5
Equipment type
DC Power Systems (-48V)
Controller / software version
Confirm against the installed equipment
View full product specifications
Huawei R4875G5 Ultra-High Efficiency Rectifier Module (48V 75A 4000W 97% Peak) - Isometric 45-Degree Angled View

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

Rated Output VA / Wattage
4000W High Power Density
Chassis Form Factor
1U Hot-Pluggable Modular Rectifier Cassette
AC Input Voltage
85V - 300V AC Wide Grid Tolerance
Rated DC Output Current
-48VDC (-42V ~ -58V)
Nominal DC Output Voltage
-48VDC (-42V ~ -58V)
Peak Energy Efficiency
97%

Alarms & troubleshooting

AC_IN_FAIL / VOLT_ABNORMAL
Input Amber LED blinking, module in standby protection mode
Utility input voltage outside operating limits (<85VAC or >300VAC) or internal input fuse open
1. Measure AC line-to-neutral voltage at the module slot with a multimeter;\n2. Inspect corresponding subrack AC input circuit breaker status;\n3. If grid voltage is normal, extract module and examine rear gold-finger pins;\n4. Reseat into an adjacent empty slot to rule out backplane connector faults.
DC_OV_SHUTDOWN / LOCKOUT
Alarm Red LED solid, module output locked out with 0V DC
Internal voltage feedback loop fault caused output to exceed HW threshold (>59.5V), or external bus backfeed
1. Measure actual DC bus voltage to ensure no external overcharging backfeed;\n2. Open AC supply breaker and allow 60 seconds for internal capacitors to discharge;\n3. Power-cycle module; if red lockout recurs immediately, replace rectifier unit.
FAN_FAIL / OVER_TEMP
Temperature Amber LED solid, cooling fan halted or output power derated
Air filter clogged with dust, cooling fan bearing seized, or ambient temperature exceeds +75°C
1. Clear accumulated dust and debris from front ventilation slots and mesh;\n2. Inspect fan blades for mechanical obstruction and verify spin-up on boot;\n3. Check cabinet ventilation airflow and ambient air-conditioning operation;\n4. If fan remains stalled, replace with genuine speed-regulated brushless DC fan.

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