| 18 | Warm air outlets blocked or circulated air intake blocked | Control panel or control panel cable defective. | Check the individual outlet apertures. Remove the circulated air intake blockage. |
| 28 | Current for control panel too high | Control panel or control panel cable defective. | Check / replace control panel cable. Check / replace the control panel. |
| 41 | Electronic blocked | Electronic blocked: -Because the air temperature switch an/or water temperature switch opened during operation due to over-heating. -Because the air temperature switch cable is damaged. -Due to a short-circuit of the combustion air temperature sensor (corresponds to temperatures > 215C) | Check / replace control panel cable. Check / replace the control panel. |
| 42 | Window switch open. | Bridge for window switch on electronics is interupted | Check / replace window switch cable. |
| 43 | Over voltage higher than 15 V | 12 V power supply failure. | Check power from battery / fuse box. |
| 44 | Under voltage lower than 10.5 V | 12 V power supply failure. | Check power from battery / fuse box. |
| 45 | No 120V supply to Combi | 120V power supply failure. | No 120 supply voltage at the outlet. Check GFI reset button. Check power to outlet. |
| 60 | Voltage fluctuation | Power supply not constant | Check overheat temperature sensor. |
| 112 | 1) Flame not detected 2) Bad earth or battery earth for Combi minus connection defective. 3) Gas pressure regulation system | 1)Flame has gone out or is not detected (error can also occur only after 3 - 5 minutes). 2) Earth connection on the power supply is poor or missing. 3)Gas cylinder closed. Switch for gas shut-off valve | Check power from battery / fuse box. 1) Check LP Supply. Check gas shut-off switch on top of the unit. 2) Check the earth connection of the power supply. |
| 116 | Dirty supply voltage | AC components in power supply. | Check power supply, AC components also possible through power supply units or solar systems. |
| 117 | Dirty supply voltage | AC components in power supply. | Check power supply, AC components also possible through power supply units or solar systems. |
| 121 | Flame unstable. | Gas cylinder closed. On/Off switch for gas valve is off. | Check gas supply and turn on gas valve switch on top of unit. |
| 122 | 1) Flame not detected | 1) Gas supply interupted. 2)Combustion air infeed or exhaust gas outlet closed. 3) Gas pressure regulation system defective. 4) Overheating protection has responded. | 1) Check or replace the gas pressure regulation system. 2) Check for obstructions such as slush, ice or leaves and remove from openings. |
| 149 | Water temperature switch over-temperature or air temperature switch over-temperature. | | |
| 150 | Air temperature switch over-temperature or water temperature switch over-temperature. | | |
| 202 | Flame not detected. 2) Bad earth or battery earth for Combi minus connection defective. 3) Gas pressure regulation system | 1)Flame has gone out or is not detected (error can also occur only after 3 - 5 minutes). 2) Earth connection on the power supply is poor or missing. 3)Gas cylinder closed. Switch for gas shut-off valve | 1) Check LP Supply. Check gas shut-off switch on top of the unit. 2) Check the earth connection of the power supply. |
| 212 | Flame not detected. | 1) Gas supply interupted. 2)Combustion air infeed or exhaust gas outlet closed. 3) Gas pressure regulation system defective. 4) Overheating protection has responded. | 1) Check or replace the gas pressure regulation system. 2) Check for obstructions such as slush, ice or leaves and remove from openings. |
| 238 | Overtemperature of the combustion air temperature sensor. | | |
| 239 | Water temperature switch over-temperature or air temperature switch over-temperature. | | |
| 255 | No connection between heater and control panel. | 1) Combi has no connection to 12 V power supply. 2)Control panel cabel faulty or damaged. | Ensure 12 V power is at the Combi. Change cabel between Combi and control panel. |
