DC-DC Chargers (Alternator → House Battery) error codes

45 codes from 4 manufacturers, each with its meaning and the document it comes from. Open a code for the details, or search every system.

Redarc (7)

• 1 flashInternal Hardware Fault
• 2 flashUnit below minimum operating temperature (low temp)
• 3 flashUnit above maximum operating temperature (high temp)
• 4 flashOutput Battery fault - voltage too high
• 5 flashInput (battery) voltage below 9 V (or solar below 9 V)
• 6 flashInput over voltage from vehicle or solar input, OR the solar panel is connected in reverse polarity
• All 8 flashPoor or no earth connection on the BCDC black wire

Renogy DCC50S/DCC30S (5)

• Service battery LED green (solid)Battery FULL - the service battery is fully charged. Normal.
• Service battery LED yellow (solid)Battery voltage NORMAL - the service battery is in its normal voltage range.
• Service battery LED red (solid)Battery UNDERVOLTAGE - the service battery is low. The indicator turns red at the 12.0V under-voltage warning…
• Service battery LED red slow-flashingBattery OVER-DISCHARGED - the service battery has dropped below the over-discharge point.
• Service battery LED red fast-flashingBattery OVER-VOLTAGE or OVER-TEMPERATURE - charge voltage is too high or the battery temperature is out of…

Sterling Power (14)

• Battery Type YellowBattery type selected: Open lead-acid (info-only LED on top panel; confirms chemistry-select setting)
• Battery Type GreenBattery type selected: manual's item-14 legend reads Gel/sealed lead-acid (info-only LED); NOTE -- the same…
• Battery Type RedBattery type selected: AGM (info-only LED; confirms chemistry-select setting)
• Alt Over Temp YellowAlternator over-temperature (manual gives conflicting figures: LED-meaning table says 90 °C, installation…
• Constant Current GreenBulk (high charge) cycle active — output current at maximum rated for the unit
• Timer On YellowAbsorption (timer) cycle active — battery has reached 13.9–14.0 V, timed absorption running
• Float GreenFloat mode — high-charge cycle complete; aux battery holding at float voltage
• Battery Input Over Volts RedVehicle alternator output excessive — boost SHUT OFF (alternator regulator failure / runaway). STOP-ENGINE…
• Battery Input Low Volts YellowLow voltage at vehicle (start-battery) side — info-only; possible failing alternator or worn start battery
• Battery Output Over Volts RedAuxiliary bank over-voltage — boost SHUT OFF. Either internal BB unit failure OR a competing charger on the…
• Battery Output Low Volts YellowAuxiliary bank low voltage — BB unit can't keep up with house load OR has failed
• Battery Output Over Temp RedAuxiliary battery temperature sensor reads > 50 °C — output TRIPPED. MANUAL RESET required after fault cause…
• Heatsink Over Temp YellowBB unit heatsink over-temperature — manual gives conflicting figures (LED-meaning table: 75 °C; spec table…
• Device Failure RedInternal device failure — no field-repair available

Victron Orion XS DC-DC (19)

• Error 1Battery temperature too high
• Error 2Battery voltage too high
• Error 17Controller overheated despite reduced output current
• Error 21Current sensor issue
• Error 26Terminal overheated
• Error 27Charger short circuit
• Error 28Power stage issue
• Error 33Input voltage too high
• Error 67BMS connection lost
• Error 116Calibration data lost
• Error 117Incompatible firmware
• Error 119Settings data lost
• Error 120Internal supply voltage error
• Error 122History data corrupted
• Warning 150Battery temperature too high
• Warning 151Battery temperature too low
• Warning 160Current derate due to controller high temperature
• Warning 161Short circuit detected
• Warning 162Power stage issue