Unipower Sageon Micro Power Module

Questions and Answers

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Dr. Erica MartinezAug 19, 2025
Why is the Unipower Control Unit showing a current limit or power limit alarm for one or more rectifiers?
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  Jessica JohnsonAug 19, 2025
  The total load, including battery charging current, may be equal to the output limits of the rectifiers, indicating a system overload. If only one rectifier is in current limit, it likely indicates a calibration problem with the module. The Controller usually compensates for an out-of-calibration unit in a system and will take a few minutes to adjust the unit to correctly share the load. To resolve this, revise the load level on the system and expand the number of rectifiers as required to remove the overload condition.
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martinezjoseAug 21, 2025
What to do if the Unipower Control Unit displays an over-temperature or fan failure alarm?
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  Sarah JohnsonAug 21, 2025
  This alarm could be triggered by high ambient temperature or blocked fan air intake/exhaust vents, or a fan jammed with a foreign object or excessive dust. First, check the ambient temperature and improve site cooling if possible. Then, check and remove any obstructions from the air vents. If the problem persists, replace the module, or remove and replace the fan assemblies in the module.
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Dr. David EvansAug 23, 2025
What to do if the Unipower Control Unit activates a “System Voltage Clamp” alarm?
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  Kevin RitterAug 25, 2025
  This alarm means the controller cannot reach the desired system voltage. This can be due to excessive voltage drop along the DC bus bars, inside one or more rectifiers, or the “System V Drop” parameter being set too low. If this alarm appears during equalization, the maximum output voltage from the rectifier may not be high enough to overcome the system drops to the sense point and allow the system to regulate at the desired high equalize voltage. To fix this, increase the “Sys V Drop” parameter, replace any faulty rectifiers, check that the number of rectifiers in the system is correctly set, and revise the requirements for a high equalize voltage level.
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David DavisAug 26, 2025
What to do if the Unipower Control Unit indicates 0A load current when it is known to be >5A?
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  Susan HarperAug 26, 2025
  This issue can occur if the number of rectifiers is incorrectly set too low, or if the battery current full scale (FS) is set too high. The load current is calculated from the sum of the rectifier currents minus the measured battery currents. To resolve this, check that the number of rectifiers in the Controller Base menu matches the actual number of rectifier modules installed. Also, check that the Battery DC CT rated full-scale value is correctly set in the Base menu.
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pwilliamsAug 27, 2025
How to resolve a RECTIFIER “EEPROM Fail” alarm on a Unipower Control Unit?
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  Diana BarnettAug 27, 2025
  A RECTIFIER “EEPROM Fail” alarm indicates corrupted data on the EEPROM inside the rectifier, outside the allowable data range. The rectifier software has attempted to overwrite and has failed due to the memory cell being damaged. Excessive electrical noise can also corrupt the read data transfer, leading to the same alarm. If the memory cell has failed, replace the faulty rectifier. You can try modifying each of the RECTIFIER parameters on the Controller to see if the alarm clears, as this might correct the data. Also, check for EMC problems and reduce the source of electrical interference where possible.
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Anthony CooperAug 30, 2025
What causes the Unipower Control Unit to display a “Range RECTIFIER” alarm, and how can I fix it?
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  Sharon SloanAug 30, 2025
  A “Range RECTIFIER” alarm indicates corrupted data on the EEPROM inside the rectifier that is inside the allowable data range but does not match the value programmed. To resolve this, try adjusting the RECTIFIER parameters to see if the EEPROM cells can be updated. If not, replace the faulty rectifier.
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sydney21Sep 1, 2025
How to resolve LVDS not closing on Unipower Control Unit?
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  Steven MillerSep 1, 2025
  LVDS failing to close can be due to several reasons: one or more batteries having reverse polarity, no battery connected to the battery distribution module, a blown fuse link in the battery distribution module (BDM), the controller setting for LVDS being set to “Open”, or the controller setting for LVDS being set to “Auto” while the DC bus voltage is below the LVDS trip threshold and has not increased to the float voltage. Check the battery wiring polarity, and connect a battery if none is connected. Ensure the Controller is powered up even when no rectifier is operational; if not, service the fuses in the BDM. Change the Controller LVDS setting to “Closed” or “Auto”. Finally, power up the rectifiers and reduce the load until the bus voltage increases to the float voltage.
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Ms. Samantha Matthews MDSep 3, 2025
Why do the rectifiers of my Unipower Control Unit not power up, and no LEDs are lit on the front panel?
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  Victoria AndersonSep 3, 2025
  The rectifiers may not power up due to several reasons: AC power is not connected, an internal fuse is blown, or the rectifier is not properly plugged in. To address this, re-insert the rectifier(s) and ensure the rear connections are secure. Verify that AC power is available to the rectifier backplanes. If these steps do not resolve the issue, the rectifier module may have failed and need replacement.
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Mark MataSep 5, 2025
What does it mean when the Unipower Control Unit indicates the battery current does not match an independent measurement?
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  nelsonkimberlySep 5, 2025
  If the battery current indicated does not match an independent measurement, the full-scale current of the DC hall effect current transducer is incorrectly set. This will result in an error larger than +/- 5% at more than 50% full-scale current. To correct this, change the setting of the “FS Batt Curr” value in the Base Menu of the Controller to the correct full-scale value.
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Kelsey ScottSep 7, 2025
What does it mean when the Unipower Control Unit displays a “EEPROM Fail” alarm for the Controller?
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  Tiffany MeyerSep 7, 2025
  A “EEPROM Fail” alarm for the Controller indicates corrupted data found on the backplane EEPROM that is outside the allowable data range. If the memory cell is confirmed to have failed, replace the faulty backplane.

Unipower Sageon Micro Power Module Specifications

Input Power

input voltage	85-300VAC
inrush current	<9A RMS per rectifier
power factor	>0.98 for >50% output power

Output Power

output voltage for -48VDC systems	adjustable range 42.0V to 59.5V
output voltage for +24VDC systems	adjustable range 21.0V to 30.0V
efficiency for 48VDC systems	>90% at 100% output power

Environmental Conditions

operating temperature	-40°C to +70°C
full power temperature range	-40°C to +55°C
storage/transport temperature	-40°C to +70°C

Mechanical Dimensions

width	483mm (19”)
depth	355mm (14”)
height	88mm – 352mm (3.4” – 13.6”) depending on configuration

View in Manual

Unipower Sageon Micro Power Module - User Manual

Table of Contents

Questions and Answers

Unipower Sageon Micro Power Module Specifications