Truma Battery Charger BC 10
The Truma BC 10 is a professional 10A switch-mode battery charger featuring an 8-step fully automatic charging cycle. It is designed to charge and maintain all types of 12V lead-acid batteries (WET, MF, Ca/Ca, AGM, and GEL) and includes temperature-compensated charging and a dedicated 12V power supply mode.
Technical Specifications
Master Troubleshooting & Diagnostics Matrix
| Error Code / Indicator | Symptom / Meaning | Step-by-Step DIY Fix | Suggested Actions |
|---|---|---|---|
Error Lamp Lit | Incorrect connection, wrong battery voltage, or interrupted charging. | 1. Check if the charger's positive lead is connected to the battery's positive pole. 2. Verify the charger is connected to a 12V battery. 3. Check if charging was interrupted in STEP 1 (battery seriously sulphated), STEP 2 (cannot accept charge), or STEP 5 (cannot keep charge). Press the MODE button to restart. | DIY Safe |
Power Lamp Flashing | The charger has entered energy save mode. | This occurs if the charger is not connected to the battery within 2 minutes of being plugged into the wall. Connect the charger to the battery. | DIY Safe |
Operational Fault | Indication of a battery or charging error. | Manually disconnect the charger from the mains and the battery. | DIY Safe |
Operational Fault | Incorrect connection, wrong battery voltage, or a defective battery that cannot hold a charge. | 1. Check if the positive cable is connected to the positive terminal. 2. Verify the charger is connected to a 12V battery. 3. If charging was interrupted during Step 1, 2, or 5, disconnect the battery and restart by pressing the MODE button. If it fails again, the battery may be defective and require replacement. | DIY Safe |
Operational Fault | The charger is in energy-saving mode because it has not been connected to a battery within 2 minutes of being plugged in. | Connect the charger to a battery to initiate the charging process. | DIY Safe |
Operational Fault | A fault has occurred during the charging process. | Manually disconnect the charger from the battery. | DIY Safe |
Frequently Asked Questions
Q: What types and capacities of batteries can the BC 10 charge?
It can charge all types of 12V lead-acid batteries (WET, MF, Ca/Ca, AGM, and GEL) with capacities ranging from 20Ah to 200Ah, and up to 300Ah for maintenance charging.
Q: How do I know when the battery is ready to use or fully charged?
The battery is ready to start an engine when STEP 4 (Absorption) is lit, and it is fully charged when STEP 7 (Float) is lit.
Q: What is the purpose of the Supply program?
The Supply program allows the charger to be used as a 12V power supply or for float maintenance charging when 100% battery capacity is required. Note that spark protection is disabled during this program.
Q: Can the BC 10 be used as a constant 12V power supply?
Yes, by selecting the 'Supply' program, the charger can be used as a 12V power supply or for float maintenance charging. Note that spark protection is disabled in this mode.
Q: How do I know when the battery is ready to start the engine?
The battery is ready to start the engine when STEP 4 on the 8-step display is illuminated. It is fully charged when STEP 7 is illuminated.
Q: What is the purpose of the external temperature sensor?
The external temperature sensor allows the charger to automatically adjust the charging voltage based on the ambient temperature. If it is not connected, the charger will not compensate for temperature.