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Truma • Heating & Water

Truma Combi D

Official technical documentation and workshop diagnostics for Combi D.

Technical Specifications

Operating Voltage12V DC / 230V AC
Power Consumption12V: 0.4 - 8.1 A (Heater + water container), 0.5 A (Heating up water container); 230V: 900W (3.9 A) / 1800W (7.8 A)
Gas Or PressurePump pressure max. 2.8 bar, System pressure max. 4.5 bar
Fuse Ratings12V fuse on electronics; 230V fuse (part number 39050-00381)
Dimensions Cutout450 x 510 x 300 mm

Master Troubleshooting & Diagnostics Matrix

Error Code / IndicatorSymptom / MeaningStep-by-Step DIY FixSuggested Actions
Operational Fault
Overvoltage > 16.4 V
Possible Cause: Battery voltage or voltage sources too high
Check battery voltage and voltage sources such as the charger.DIY Safe
Operational Fault
Low voltage. Battery voltage is too low < 10.0 V
Possible Cause: Battery voltage has dropped below operating threshold
Charge battery. If necessary, replace old battery.DIY Safe
Operational Fault
Risk of low voltage. Battery voltage is too low < 10.8 V
Possible Cause: Battery voltage approaching low threshold
Charge battery.DIY Safe
E 560 H
Maximum number of start attempts reached – operation locked
Possible Cause: Exceeded allowed failed startup cycles, triggering operation lockout
Contact an authorised service agent.Professional Intervention Required
E 561 H
Heater will not start – operation locked after five unsuccessful start attempts
Possible Cause: Failure to ignite after five attempts, leading to lockout
Check the fuel supply at the appliance input.DIY Safe
E 565 H
Heater will not start, flame repeatedly not detected
Possible Cause: Flame failure or lack of fuel detection during operation
Check the fuel supply at the appliance input.DIY Safe
N/A
Water taking an extremely long time to heat up
Possible Cause: Water container furred
Descale water systemDIY Safe
N/A
Water running away – water container cannot be filled
Possible Cause: Safety / drain valve open
Close safety / drain valveDIY Safe
N/A
Water container cannot be emptied, although the safety / drain valve is open
Possible Cause: Safety / drain valve drainage socket blocked
Check opening for dirt (slush, ice, leaves etc.) and remove if necessaryDIY Safe
N/A
Water container cannot be emptied, although the safety / drain valve is open
Possible Cause: Water pipe frozen
Thaw water pipeDIY Safe
N/A
Water dripping / flowing from the drainage socket of the safety / drain valve
Possible Cause: Water pressure too high
Check pump pressure (max. 2.8 bar). If the system is connected to a central water supply (town water), install a pressure reducer to prevent pressures higher than 2.8 bar in the water container.DIY Safe
N/A
After the heater has been switched off, the FrostControl opens
Possible Cause: At temperatures below approx. 3 °C the FrostControl opens automatically
Switch the heater on. If the heater is not in operation, the FrostControl can be closed again only when the temperature is about 7 °C or higher, or use a heating element for FrostControl.DIY Safe
N/A
The FrostControl can no longer be closed
Possible Cause: Temperature at the FrostControl is below approx. 7 °C
Switch the heater on. If the heater is not in operation, the FrostControl can be closed again only when the temperature is about 7 °C or higher.DIY Safe
N/A
The FrostControl can no longer be closed
Possible Cause: Rotary switch not set to 'Operation'
Turn the rotary switch of the FrostControl to 'Operation', then press the pushbutton until it engages.DIY Safe
N/A
The FrostControl can no longer be closed
Possible Cause: FrostControl faulty
Must be replaced by an authorized service agentProfessional Intervention Required
N/A
Large amounts of smoke at the wall cowl for more than 1 minute after the appliance is started
Possible Cause: Fault in the fuel supply, improper installation, combustion air infeed restricted
Stop using the appliance immediately due to fire hazard and contact customer serviceProfessional Intervention Required