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ZTE / DC power systems

ZXD030 S480 Equipment information & support

The ZTE ZXD030 S480 is a digital AC/DC rectifier utilizing phase-shifted topology and active PFC to provide regulated -48V DC power with autonomous load sharing for modular telecom enclosures.

Equipment information

Brand
ZTE
Equipment model
ZXD030 S480
Equipment type
DC power systems
Controller / software version
Confirm against the installed equipment
View full product specifications
ZXD030 S480 Official Product View 2

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
30 A
Power Conversion Efficiency
94.5 %
Physical Dimensions Spec
132 × 85 × 287 mm
AC Input Voltage Range
80 ~ 300 V AC
Operating Temperature
-25 ~ +70 °C

Alarms & troubleshooting

AC_IN_FAIL (AC Input Abnormal/Failure)
IN LED off, ALM LED solid yellow or solid red
AC mains outage, AC input voltage undervoltage (<80Vac) or overvoltage (>300Vac), upstream breaker tripped, or loose input connection terminals.
1. Measure phase-to-neutral voltage at the rectifier input slot using a DMM to verify it is within 80Vac-300Vac. 2. Inspect and reset the upstream AC miniature circuit breaker (MCB) dedicated to the module. 3. Check the rear backplane slot connector for carbonization, arc damage, or loose contacts, then reseat the module firmly.
DC_OUT_OVP (DC Output Overvoltage Shutdown)
OUT LED off, ALM LED solid red
Internal voltage feedback loop failure, shorted power switching MOSFET, incorrect float/equalize threshold set on CSU (>59.5Vdc), or triggered hardware OVP latch circuit.
1. Unseat the module from the shelf, wait 3 minutes for bus capacitors to discharge, and reseat to reset the hardware latch. 2. If the alarm recurs immediately, isolate the module and measure output voltage in standalone mode without CSU bus control. 3. Verify the OVP setting on the CSU controller (standard 58.5V-59V); if internal circuits are damaged, replace the rectifier module.
OVER_TEMP_ALM (Over-Temperature Derating/Thermal Shutdown)
ALM LED flashing yellow or solid yellow; solid red if thermal shutdown occurs
Ambient temperature exceeding operating limits (>+65°C), front air filter blocked with dense dust, internal heatsink clogged, or faulty NTC temperature sensor.
1. Check site air conditioning and lower the cabinet inlet ambient temperature to the optimal range (+20°C to +30°C). 2. Clean the front panel air filter and use compressed air/ESD brush to blow out dust from internal heatsinks. 3. Ensure minimum 100mm clearance in front and rear for proper convective airflow; module will automatically recover once cooled down.
FAN_FAULT (Cooling Fan Stalled/Speed Fault)
ALM LED flashing yellow or solid red
Cooling fan blades mechanically jammed by foreign objects, disconnected internal fan cable, loss of Hall sensor tachometer feedback, or bearing failure.
1. Remove the module and visually inspect the fan assembly for foreign debris or cable obstruction. 2. Spin the blades manually with power disconnected to verify smooth rotation without mechanical resistance. 3. Power on the module to monitor initial self-test spin; if supply voltage is present but the fan fails to run or report tach signal, replace the fan unit or rectifier module.
CAN_COMM_ERR (CAN Bus Communication Loss/Current Share Error)
ALM LED slow flashing yellow, IN and OUT LEDs remain normal green
Gold-finger contact degradation on backplane CAN pinout, address ID conflict with other modules, CSU protocol mismatch, or damaged 120-ohm CAN termination resistor.
1. Withdraw the module, clean gold-finger connectors using isopropyl alcohol, and reseat firmly. 2. Access the CSU monitor menu, verify rectifier communication status, and ensure module ID is dynamically recognized without collision. 3. Measure resistance across CAN_H and CAN_L with system de-energized (nominal value ~60 ohms for two parallel 120 ohm terminators); repair cabling if open-circuit.

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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