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ZTE / Outdoor power systems

ZXDU68 B301 2.1m Outdoor Equipment information & support

The ZTE ZXDU68 B301 2.1m Outdoor Cabinet is a large-scale integrated outdoor telecom power station rated at -48V 300A, featuring heavy-duty dual-wall IP55 thermal insulation, battery compartments, and ZXD3000 high-efficiency rectifiers.

Equipment information

Brand
ZTE
Equipment model
ZXDU68 B301 2.1m Outdoor
Equipment type
Outdoor power systems
Controller / software version
Confirm against the installed equipment
View full product specifications
ZXDU68 B301 2.1m Outdoor Official Product View 2

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

System Output Capacity
300 A
Nominal Output Voltage
-48 VDC
Output Voltage Range
-42 ~ -58 VDC
AC Input Voltage Range
80 ~ 300 VAC (three-phase input)
Rectifier Module Slots
6 slots (compatible with ZXD3000 high-efficiency rectifiers)
System Monitoring Controller
CSU502A with network management and remote communication

Alarms & troubleshooting

AC_FAIL (AC Mains Failure / Phase Loss)
CSU ALM LED solid red; Rectifier (ZXD3000) IN/OUT LEDs off, FAULT LED solid red
Commercial grid blackout, AC input circuit breaker tripped, phase voltage below 80VAC, or severe three-phase imbalance
1. Measure phase-to-phase and phase-to-neutral AC voltages (L1/L2/L3/N) at input terminals using a multimeter. 2. Verify the AC input MCB (QF1) and surge protector breaker are in the closed position. 3. Check ATS automatic transfer switch position and upstream diesel generator or utility mains feed integrity.
DC_OVP (DC Overvoltage Lockout / HVSD)
CSU ALM LED solid red; Faulty rectifier FAULT LED solid red, module hardware-locked with zero output
Rectifier internal PWM regulation failure, corrupted CSU float/equalize overvoltage threshold (>59.5V), current share failure, or shorted internal diode
1. Measure actual DC bus voltage with a calibrated multimeter and compare against CSU reading. 2. Locate the specific rectifier module with solid FAULT LED, turn off its AC input breaker, and extract it to reset HVSD lock. 3. Re-seat and power on; if the module trips on overvoltage immediately, replace the ZXD3000 rectifier.
DC_LLVD (Load Low Voltage Disconnect Active)
CSU ALM LED flashing red at 2Hz, audible buzzer active; LLVD contactor mechanically open
Prolonged mains outage discharging batteries below LLVD threshold (default 47.0V), contactor coil driver failure, or faulty voltage sampling circuit
1. Verify site AC source status; connect a mobile diesel generator immediately to re-energize rectifiers. 2. Measure individual battery blocks and total bank voltage to verify actual state of discharge. 3. If AC is restored but LLVD does not close, run manual contactor test from CSU menu or engage emergency bypass bar.
CAN_COMM_FAIL (Rectifier CAN Bus Communication Failure)
CSU ALM LED solid amber, comms alarm displayed; Affected rectifier ALM LED flashing amber at 1Hz
Backplane CAN ribbon cable loose, oxidized gold-finger connector pins, faulty 120-ohm bus termination resistor, or damaged CAN transceiver IC
1. Inspect and reseat the RJ45/flat ribbon CAN cable connecting the CSU to the power distribution backplane. 2. Withdraw the uncommunicative rectifier, clean rear gold-finger connector pins with isopropyl alcohol, and firmly reseat. 3. De-energize control bus and measure resistance across CAN_H and CAN_L; confirm it reads approximately 60 ohms (parallel termination).
SPD_FAIL (Surge Protective Device Failure)
SPD physical inspection window turned from GREEN to RED; CSU ALM LED solid amber
High-energy lightning surge strike causing varistor (MOV) thermal blowout, dedicated SPD circuit breaker tripped, or signal dry-contact wire open
1. Verify if the upstream miniature circuit breaker (MCB) dedicated to the SPD has tripped; re-close if clear. 2. Inspect the color window on each modular surge cartridge to locate the defective red unit. 3. Switch off the SPD breaker, remove the damaged plug-in cartridge, replace it with a genuine spare (Class C/40kA), and verify alarm clears.

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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