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Eltek / DC power systems

Flatpack S 48/1000 HE Equipment information & support

The Eltek Flatpack S 48/1000 HE is an ultra-compact shallow-depth high-efficiency telecom rectifier module delivering 1000W (-48V/20A) with over 95.5% peak conversion efficiency for space-restricted telecom enclosures.

Equipment information

Brand
Eltek
Equipment model
Flatpack S 48/1000 HE
Equipment type
DC power systems
Controller / software version
Confirm against the installed equipment
View full product specifications
Flatpack S 48/1000 HE Official Product View 1

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

Rated Output Power
1000 W
Nominal Output Voltage
-48 VDC
Rated Output Current
20.8 A
Output Voltage Range
-43.5 ~ -57.6 VDC
AC Input Voltage Range
85 ~ 305 VAC
Power Conversion Efficiency
95.5% (HE high efficiency)

Alarms & troubleshooting

AC_MAINS_FAIL (AC Input Voltage Out of Range)
Power LED (Green) OFF, Alarm LED (Red) Solid ON
AC input voltage is out of range (<85 VAC or >300 VAC), upstream breaker tripped, or loose power connector on the subrack backplane.
1. Measure AC voltage across L and N terminals at the module slot using a true-RMS DMM (nominal 85-300 VAC). 2. Inspect the AC distribution unit (ACDU) circuit breaker or fuse dedicated to this rectifier position. 3. Unseat module, inspect blind-mate rear connector pins for thermal discoloration or arcing, and firmly reseat.
DC_OVP_SHUTDOWN (DC High Voltage Selective Shutdown)
Power LED (Green) OFF, Alarm LED (Red) Solid ON (Latched)
Rectifier internal sensor detected output voltage exceeding hardware selective shutdown threshold (typically 59.5 VDC), latching the unit off to protect loads and batteries.
1. Pull the latched rectifier module out of the shelf and wait 30 seconds to allow internal capacitors to discharge and reset the latch. 2. Verify the float/boost voltage target on the Smartpack S controller (nominal 53.5V to 56.4V DC). 3. Re-insert the module; if the red LED re-latches immediately, the internal regulation loop or power stage is damaged; replace the module.
OVER_TEMP (High Internal Temperature / Thermal Shutdown)
Warning LED (Yellow) Flashing during derating; Alarm LED (Red) Solid ON upon thermal shutdown
Intake ambient air temperature exceeds rating (>55°C derating threshold, >75°C shutdown), subrack air filter clogged, or thermal hot-air recirculation occurs inside the cabinet.
1. Verify shelter HVAC cooling operation and measure ambient intake temperature (recommended between +25°C and +45°C). 2. Clean or replace clogged dust filters on the cabinet door and remove debris from the module's front intake grill. 3. Verify that blanking plates are installed on all unused shelf positions to prevent hot exhaust air recirculation.
FAN_FAIL (Rectifier Cooling Fan Locked Rotor / Speed Error)
Alarm LED (Red) Flashing (1Hz) or Solid ON, Power LED (Green) ON
Internal brushless DC fan obstructed by foreign debris, fan tachometer signal lost, or bearing failure causing speed below lower threshold.
1. Withdraw the module from the slot and visually inspect through the front grill for mechanical blockage or hair/dust binding the fan. 2. Gently spin blades to verify smooth bearing movement; clear internal chamber using dry compressed air. 3. Re-seat module and power up; if the fan fails its initial POST spin test or red LED persists, replace the fan assembly or entire rectifier module.
CAN_COMM_FAIL (CAN Bus Communication Loss / Missing Module)
Power LED (Green) Solid ON, Warning LED (Yellow) Slow Flashing (0.5Hz)
Communication between the rectifier and Smartpack controller interrupted due to bent/oxidized CAN pins on the backplane, missing end-of-line 120Ω termination resistor, or address conflict.
1. Open the Smartpack S controller interface (GUI/Web) to locate the offline rectifier index and slot position. 2. Eject the rectifier and inspect signal contact pins (CAN_H, CAN_L, and module ID pins) on the backplane connector for bending or oxidation. 3. Verify the 120Ω CAN bus termination jumper is in place at both ends of the power shelf; reseat the unit firmly and observe if yellow LED extinguishes within 15 seconds.

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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