The BCDC Classic (BCDC1225D, BCDC1240D, BCDC1250D) charger uses LED flash codes to alert users to issues with power, temperature, voltage, grounding, or connections.
These signals help identify whether the problem is with the input, output, battery, or wiring. Most faults can be traced to poor connections, unstable power supply, or unsuitable operating conditions, and can often be resolved by checking wiring, fuses, grounding, and resetting the unit.
REDARC recommends seeking the support of a qualified auto electrician or technician.
Important
In this article we explain the need for testing to determine the cause of the issue. Testing may involve changes to the installation or wiring. For your safety and accuracy, REDARC recommends engaging a REDNetwork member or a suitably qualified auto electrician - Find Your Local Installer
This information is applicable for the following products:
- BCDC Classic Under Bonnet 25A DC Battery Charger (BCDC1225D)
- BCDC Classic Under Bonnet 40A DC Battery Charger (BCDC1240D)
-
BCDC Classic Under Bonnet 50A DC Battery Charger (BCDC1250D)
Image above shows how fault occurs
BCDC Classic Fault Codes
| Flashing Sequences | |
| LED State | Description |
| 1 flash (followed by 3.5 second off) | Poor / cycling power or poor earth or internal hardware fault. |
| 2 flash (followed by 3.5 second off) | Unit exposed to low temperature and is below the minimum operating temperature. |
| 3 flash (followed by 3.5 second off) | Unit exposed to high temperature and is above the maximum operating temperature. |
| 4 flash (followed by 3.5 second off) | Output Battery fault present relating to voltage too high. |
| 5 flash (followed by 3.5 second off) |
Voltage on the input (battery) has fallen below 9 volts. This is below the required working limit of the BCDC.
In some instances when solar is connected in reverse polarity, it can inadvertently cause the BCDC to change to 24V mode. If this occurs the BCDC needs to be completely de-powered for at least one minute then reconnect red & brown wires. |
| 6 flash (followed by 3.5 second off) | Input over voltage from either the vehicle or solar input. |
| All 8 flash continuously | Poor or no earth connection on the BCDC black wire. |
| *3 If the Unit is being supplied power from the vehicle and solar simultaneously and ONE of those sources is undervoltage, that specific source LED will flash 5 times. If the Unit is being supplied power from the vehicle and solar with BOTH sources under voltage, OR if the Unit is being supplied power from one input only and that input is undervoltage, ALL LED’s will flash 5 times. | |
No LEDs ON at all
This indicates that there is no battery connected to the output (BROWN wire) or that battery is not at a suitable voltage level to be charged AND the input (YELLOW/RED wire) of the charger is not connected.
- Check all wiring to the charger and battery, particularly the Ground (BLACK wire).
- Check fuses are intact and properly connected.
Charge Profile LED Flashing
This indicates that either Output or Input is not valid, either:
- An Auxiliary battery at a suitable voltage level to be charged is connected to the output of the charger, however there is currently no valid charging source.
- A valid charging source is available but the Auxiliary battery is not at a suitable voltage level to be charged or is not connected.
- Check that the Vehicle (RED wire) and/or Solar (YELLOW wire) are electrically connected.
- The Vehicle (RED wire) should connect directly to the Vehicle battery positive terminal via an adequately rated fuse.
- The Solar (YELLOW wire) should connect directly to the Solar Panel positive terminal/wire.
- Check that the Ground (BLACK wire) is connected to the Auxiliary battery and Chassis Earth and/or the Solar Panel negative terminal/wire.
- Check all wiring to the Auxiliary battery, particularly the Ground (BLACK wire).
- Check fuses are intact and properly connected.