Truma CP plus VarioHeat control panel
Official technical documentation and workshop diagnostics for CP plus VarioHeat.
View official manual on manufacturer's site ↗Technical Specifications
Operating Voltage8 V - 16.5 V DC
Power Consumptionmax. 65 mA (100% background lighting), 6.5 mA - 10 mA (stand-by), max. 3 mA (Off)
Dimensions Cutout92 x 103 x 40 mm
Master Troubleshooting & Diagnostics Matrix
| Error Code / Indicator | Symptom / Meaning | Possible Cause | Step-by-Step DIY Fix | Suggested Actions |
|---|---|---|---|---|
E 2 H | Flame not recognised / Heater fault | Gas cylinder empty | Replace gas cylinder | DIY Safe |
E 2 H | Flame not recognised / Heater fault | The gas cylinder or its quick-acting valve is closed. | Check and/or open the gas supply valves | DIY Safe |
E 2 H | Flame not recognised / Heater fault | The gas pressure regulator has iced up | Use EisEx regulator heater | DIY Safe |
E 2 H | Flame not recognised / Heater fault | The gas cylinder's butane content is too high | Switch to propane instead - butane doesn't heat well, especially below 10°C | DIY Safe |
E 2 H | Flame not recognised / Heater fault | The combustion air inlet or exhaust outlet is blocked | Check the openings for anything blocking them (slush, ice, leaves, etc.) and clear it away. | DIY Safe |
W 25 H | Overvoltage warning | Overvoltage > 16.4 V | Check the battery voltage and whatever's supplying it, such as the charger | DIY Safe |
W 26 H | Low voltage warning | Low voltage - battery voltage has dropped below 10V | Charge the battery, and fit a new one if it's old | DIY Safe |
W 27 H | Air flow warning | Either the warm air outlets are blocked, the circulated air intake is blocked, or the EN end outlets are closed | Remove blockage and open end outlets EN | DIY Safe |
W 28 H | Window switch warning | The window switch above the cowl is open | Close windows | DIY Safe |
W 29 H | Risk of low voltage warning | Low voltage risk - battery voltage has dropped below 10.4V | Charge battery | DIY Safe |
W 255 H | Power supply or connection warning | The heater has no 12V supply, or the heater and control panel aren't connected to each other | Confirm there's a 12V supply, and connect up the heater and control panel. Contact an authorised service agent if this doesn't resolve it. | DIY Check / Tech Fallback |
E 8 A | Air conditioning system fault | The IR receiver is unplugged, or its cable is broken | Check the IR receiver's connection. | DIY Safe |
E 17 A | Air conditioning system fault | The 230V supply has dropped | Check 230 V power supply | DIY Safe |
W 8 A | Air conditioning system warning | The IR receiver is unplugged, or its cable is broken | Check the IR receiver's connection. | DIY Safe |
W 17 A | Air conditioning system warning | The 230V supply has dropped | Check 230 V power supply | DIY Safe |
W 101 E | E-Kit overvoltage warning | Overvoltage > 16.1 V | Check the battery voltage and whatever's supplying it, such as the charger | DIY Safe |
W 102 E | E-Kit low voltage warning | Low voltage - battery voltage has dropped below 10.4V | Charge the battery, and fit a new one if it's old | DIY Safe |
W 103 E | E-Kit air flow warning | Warm air outlets blocked or circulated air intake blocked | Check each outlet opening individually and clear the circulated air intake blockage | DIY Safe |
W 104 E | E-Kit voltage warning | No 230 V operating voltage or 230 V fuse defective | Restore 230 V operating voltage or replace 230 V fuse | DIY Safe |
W 255 E | E-Kit power supply or connection warning | The Truma E-Kit has no 12V supply, or there's no connection between the E-Kit and the control panel | Confirm there's a 12V supply, and connect up the heater and control panel. Contact an authorised service agent if this doesn't resolve it. | DIY Check / Tech Fallback |