Truma Cooler BatteryPack
The Truma Cooler BatteryPack is a portable Li-ion (Li-NMC) battery designed to attach via magnets directly to a Truma Cooler compressor cooler. It supplies independent power to the cooler without needing mains power or vehicle power, offering a nominal capacity of 212 Wh / 14.7 Ah and up to 18 hours of operating time with a Truma Cooler C30.
View official manual on manufacturer's site ↗Technical Specifications
Master Troubleshooting & Diagnostics Matrix
| Error Code / Indicator | Symptom / Meaning | Possible Cause | Step-by-Step DIY Fix | Suggested Actions |
|---|---|---|---|---|
BatteryPack won't switch on | The battery may be fully discharged or switched off automatically due to high temperatures or system protection. | — | Check the BatteryPack is fully charged. If it's been somewhere hot, let it cool down, then switch it on again. | DIY Safe |
Unable to charge the BatteryPack | Plugs may be loose, power connection faulty, or ambient temperature outside the permitted charging range. | — | Check every plug is pushed fully home and the power connection works, and only charge it at 16-40 °C. | DIY Safe |
All four LEDs flash simultaneously | The BatteryPack has automatically switched off due to low charge (voltage falls below 12.6 V) or system protection activation. | — | Fully charge the BatteryPack immediately; do not store it while all four LEDs are flashing to avoid deep discharge damage. | DIY Safe |
All four LEDs of the capacity indicator flash simultaneously | Deactivation due to low charge (output voltage below 12.6 V) or activation of system protection due to anomalies such as short circuit, overvoltage, overload, etc. | — | Detach the BatteryPack from the Cooler, sort out whatever caused the fault, then refit it and switch it on. If it has been deeply discharged, give it a full charge. | DIY Safe |
The BatteryPack cannot be activated | The BatteryPack may be discharged or has automatically deactivated due to exposure to high temperatures. | — | Make sure the BatteryPack is fully charged, or if it's been exposed to heat let it cool, then switch it back on. | DIY Safe |
The BatteryPack cannot be charged | Incorrect connections, power supply failure, or ambient temperature outside the permitted range. | — | Confirm all the plugs are firmly connected and the power supply is working, and only charge it at temperatures from 16 °C to 40 °C. | DIY Safe |
BatteryPack cannot be turned on | Battery is depleted or has automatically shut down due to excessive heat exposure. | — | Ensure the BatteryPack is fully charged, allow it to cool down if exposed to high temperatures, and switch it on again. | DIY Safe |
BatteryPack cannot be charged | Incorrect plug connections, non-functional mains connection, or ambient temperature outside the permitted range. | — | Ensure all plugs are correctly inserted, check mains connection functionality, and charge only within the 16 °C to 40 °C temperature range. | DIY Safe |
All four LED capacity indicators flash simultaneously | Low charge cut-off activated (output voltage below 12.6 V) or system protection triggered (short circuit, overvoltage, overcharging, deep discharge, simultaneous charge/discharge, or excessively high ambient temperature). | — | Disconnect from Truma Cooler, eliminate the cause of the fault, reconnect, and fully charge the battery immediately if deep-discharged. | DIY Safe |
Frequently Asked Questions
Q: How do I turn the BatteryPack on and off?
Hold the On/Off switch for two seconds - that switches the BatteryPack on, and the same again switches it off.
Q: Can the Truma Cooler run from the BatteryPack and the vehicle supply at once?
No - doing so could let the Cooler charge the BatteryPack unintentionally, which could badly injure someone and damage the product.
Q: What should I do if the BatteryPack has been dropped or damaged?
If the BatteryPack has been dropped, its case is cracked or it's damaged in any other way, stop using it and get in touch with Truma Service.
Q: How is the BatteryPack attached to the cooler?
Its magnetic feet hold it directly onto any metal part of the Truma Cooler.
Q: Can the BatteryPack be charged while powering the Truma Cooler?
No. While the BatteryPack is charging its Cooler connection is switched off - and the Cooler must never be hooked up to the BatteryPack and another power source together.
Q: Can the BatteryPack be transported by airplane?
No, transporting the BatteryPack on an airplane is prohibited due to the hazard associated with air transport of dangerous materials.