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Huawei / Indoor power systems

Huawei ETP 200A Embedded Power System Equipment information & support

The Huawei ETP 200A is an industrial-grade 3U 19-inch rack-mounted embedded DC power system delivering 200A nominal output at -48V DC. Designed with single/three-phase AC auto-sensing distribution, four R4850G2 high-efficiency rectifier slots, an SMU02C central monitor, and multi-branch DC distribution with two-stage battery protection, it provides high-availability power infrastructure for mission-critical telecom sites.

Equipment information

Brand
Huawei
Equipment model
Huawei ETP 200A Embedded Power System
Equipment type
Indoor power systems
Controller / software version
Confirm against the installed equipment
View full product specifications
Huawei ETP 200A 3U 19-inch Embedded DC Power System (4x R4850G2 & SMU02C)

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

System Output Capacity
200A (-48V DC) nominal DC output power capacity
Physical Form Factor
Standard 3U 19-inch rack-mount heavy-duty power subrack
Controller System
SMU02C integrated dynamic environment monitoring LCD unit (SNMP/Web/Modbus)
Rectifier Module Slots
4 slots (suitable for 4× R4850G2 50A ultra-high efficiency rectifiers)
AC Distribution Input Spec
Single-phase / three-phase adaptive AC power distribution input (with surge protection)
System Comprehensive Efficiency
≥ 96% high-frequency digital rectification energy efficiency standard

Alarms & troubleshooting

AC_PWR_FAIL (AC Power Failure)
SMU controller red ALM LED solid on; Rectifier green RUN LED off, yellow ALM LED solid on
Commercial grid blackout, upstream AC input circuit breaker tripped, or loose AC input wiring terminal connection.
1. Measure phase-to-neutral and phase-to-phase voltages at the AC input terminal block using a multimeter. 2. Verify whether the internal AC breaker or upstream distribution circuit breaker has tripped; resolve any short-circuit before resetting. 3. Inspect AC surge protection circuit breaker and ensure SMU AC sampling wiring is intact.
LLVD_ALM (Load Low Voltage Disconnect Alarm)
SMU controller red ALM LED solid on; internal LLVD DC contactor mechanically open
Prolonged AC power outage caused deep battery discharge past the LLVD threshold (default ~47.0V DC), triggering the contactor to shed non-critical loads.
1. Connect an emergency mobile generator to the AC input terminals to restore system power immediately. 2. If grid restoration is delayed and loads are mission-critical, access the SMU menu to manually bypass or temporarily lower the LLVD setpoint (beware of battery damage). 3. Once AC power is restored, verify that rectifiers power on, bus voltage climbs above reconnect threshold, and the LLVD contactor automatically closes.
RECT_HVSD (Rectifier Output Overvoltage Hardware Lockout)
Faulty rectifier module red ALM LED solid on, green RUN LED off
Internal voltage regulation loop failure or PWM control fault in the rectifier caused output voltage to exceed the hardware protection threshold (>59.5V DC), engaging the latch-off circuit.
1. Confirm the faulty rectifier output current is 0A, unlock the locking latch, and pull the module out of the subrack slot. 2. Wait for at least 1 minute until internal bulk capacitors fully discharge, resetting the hardware overvoltage latch. 3. Reinsert the module firmly; if the red ALM LED re-illuminates immediately, the internal circuit is damaged—replace with a new rectifier module (e.g., R4850G2/R4850N).
RECT_COMM_FAIL (Rectifier Communication Failure)
Affected rectifier yellow ALM LED blinking (0.5 Hz); SMU controller LCD displays Rectifier Comm Failure
Poor contact on the rectifier gold-finger connector or backplane CAN bus pins, faulty CAN bus termination resistor, or loose SMU seating.
1. Verify the module handle latch is fully engaged; unseat the module, clean gold-finger contacts with an anti-static cloth, and reseat firmly. 2. Ensure the SMU controller is seated properly in its slot; re-seat if necessary to restore CAN backplane integrity. 3. Access 'Parameters -> Rectifier' on the SMU to verify module address assignment; swap the module into an adjacent known-good slot to isolate slot vs module failure.
AC_SPD_FAULT (AC Surge Protective Device Failure)
SPD module status inspection window turned from green to red; SMU yellow ALM LED solid on
Repeated lightning strikes or utility grid switching surges exceeded MOV capacity, degrading the module, or dry contact sensor wiring disconnected.
1. Visually check the indicator windows on all AC SPD phases to identify which plug-in cartridge has turned red. 2. Inspect the micro-switch dry contact wiring from the SPD base to the SMU sensor input port for disconnections. 3. Trip the SPD backup breaker, pull out the degraded SPD cartridge, plug in a replacement unit of the same rating, restore the breaker, and confirm alarm clearance.

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.

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