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Dpc / DC power systems

DPC 6U Embedded Telecom DC System Equipment information & support

The DPC 6U Embedded DC Power System is a rugged 19-inch rackmount telecom power plant rated at -48V 150A, integrating multi-channel AC surge protection, DC circuit breakers, and an intelligent supervisory controller.

Equipment information

Brand
Dpc
Equipment model
DPC 6U Embedded Telecom DC System
Equipment type
DC power systems
Controller / software version
Confirm against the installed equipment
View full product specifications
DPC 6U Embedded Telecom DC System Official Product View 3

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

System Output Capacity
150 A
Nominal Output Voltage
-48 VDC
Output Voltage Range
-42 ~ -58 VDC
AC Input Voltage Range
90 ~ 290 VAC (three-phase/single-phase compatible input)
Rectifier Module Slots
3 Slots (Supports DPC 50A rectifiers)
System Monitoring Controller
DK04 / DK03 power system central monitoring module

Alarms & troubleshooting

AC_FAIL (AC Mains Failure / Phase Loss)
CSU ALM LED solid red; Rectifier AC green LED off, yellow alarm LED solid on
Grid power outage, upstream AC circuit breaker trip, SPD failure/short-circuit, or loose input terminal connection causing phase loss
1. Measure phase-to-phase (380V±15%) and phase-to-neutral (220V±15%) voltage at the AC input terminal block using a digital multimeter. 2. Inspect the AC input MCB; verify downstream circuits are clear of short circuits, then reclose if tripped. 3. Check the surge protection device (SPD) status window; replace the plug-in cartridge immediately if red. 4. Check the upstream ATS or diesel generator status; wait for grid restoration or manual switch to standby power.
HVSD_LOCKOUT (DC Output Overvoltage Hardware Lockout)
Faulty rectifier module FAULT LED solid red; DC output dropped to 0V and latched, CSU triggers audible/visual alarm
Rectifier internal PWM voltage feedback loop failure, optocoupler breakdown, or severe external surge causing DC bus voltage to exceed 59.5V threshold
1. Identify the slot ID of the locked-out rectifier module on the CSU monitoring unit. 2. Unseat and pull out the faulty rectifier module from the subrack to discharge internal capacitors (wait at least 3 minutes). 3. Re-insert the module to attempt a soft restart; if the HVSD lockout persists, replace it with a spare module. 4. Check CSU float and boost charge voltage parameters to ensure settings are within spec (-53.5V to -56.4V).
LLVD_ACTIVE (Low Load Voltage Disconnect Active)
CSU ALM LED solid red; LLVD contactor trip indicator lit / status open
Prolonged AC mains outage and battery deep discharge reaching the LLVD threshold (typically -43.2V to -44.0V), causing contactor release to shed non-critical loads
1. Immediately verify whether the site emergency diesel generator has auto-started; start manually if failed. 2. Monitor battery terminal voltage; if it declines near the BLVD threshold (-42.0V), prepare emergency portable generator hookup. 3. Once AC power is restored, verify rectifiers start and charge batteries; confirm LLVD contactor automatically recloses. 4. If the contactor does not reclose after bus recovery, check the LLVD coil driver fuse and control auxiliary wiring.
CAN_COMM_ERR (CAN-bus Communication Loss & Current Share Error)
Rectifier ALM LED flashing yellow (1Hz); CSU COMM LED off or flashing red, CSU displays module offline
6U subrack backplane CAN pin deformation, loose interconnect ribbon cable, terminating resistor (120Ω) mismatch, or damaged CAN transceiver chip in a module pulling down the bus
1. Verify all rectifier modules are firmly inserted into the 6U subrack and front retention screws are fully tightened. 2. Measure terminal resistance between CAN_H and CAN_L using a multimeter with power off (normal value is approx. 60Ω, two 120Ω resistors in parallel). 3. Sequentially remove rectifier modules one by one; if communication recovers after pulling a specific module, replace that faulty unit. 4. Check the ribbon cable between the CSU monitor and the backplane; reseat and secure firmly.
RECT_FAN_FAIL (Rectifier Fan Stalled & Thermal Derating)
Rectifier yellow ALM LED solid on; turns to solid red FAULT on thermal trip; fan stopped or generating scraping noise
Air intake dust filter clogged by fibers/particulates, fan bearing dry or seized, damaged PWM speed control circuit, or failed Hall sensor triggering automatic thermal derating or shutdown
1. Inspect the rectifier front air grille; clear accumulated dust and lint using an ESD-safe brush and vacuum. 2. Check if the fan impeller is physically jammed; if there is mechanical resistance when spun by hand, replace the DC fan assembly. 3. Verify internal temperature on the CSU; if the fan spins but temp remains excessively high (>75°C), inspect site air conditioning and cabinet clearance. 4. If tachometer speed reads 0 RPM after fan replacement, the internal fan driver board is defective; replace the entire rectifier module.

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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