If you encounter problems while operating a gas boiler, a self-diagnosis system will help you. The built-in controller fixes problems in the operation of equipment units and displays the error code of the Proterm Cheetah boiler on the display. The decryption of the code indicates where to look for the malfunction and how to repair the device yourself.
The series is represented by double-circuit and single-circuit boilers. The first serve hot water supply (DHW) and heating systems. Equipped with a built-in water heater from 30 to 60 liters. Wall units are suitable for apartments and private houses.
Single-circuit units “Proterm Cheetah” include indirect heating boilers. Combustion chambers in both designs can be open and closed. If you have a chimney shaft, choose a model with an atmospheric burner that takes air from the room. If a chimney is not provided in the building, a turbo burner with gas exhaust through a coaxial chimney is suitable.
If you did not find answers to questions in your instructions, in the table we listed all the malfunctions of the Protherm Gepard boilers. You will learn how to do it yourself.
Error code | What do they mean | Location of the problem | How to fix a breakdown |
F00 | Problems with NTC temperature sensors. | Feed line. Contacts open, no signal. | Inspect cables and wiring for tightness. Replace the defective item. |
F01 | Return line. |
F02 | DHW. Contact problems. |
F03 | Boiler. |
F04 | Collector. |
F05 | Products tap. |
F06 | Traction. |
F07 | Solar collector in reverse feed. |
F08 | Grounding the water heater. |
F09 | Hoods. |
F10 | Faulty heating thermistor. The feed sensor has broken. Short circuit (short circuit). | Ringing details, installation of serviceable elements. Diagnostics of connections, wiring, loop replacement. |
F11 | Short circuit of the sensor on the return. |
F12 / F13 | DHW water heater. |
F14 | Collector. |
F15 | Combustion products. |
F16 | Traction. |
F17 | Returns on the solar collector. |
F18 | Grounding the heater. |
F19 | Hoods. |
F20 | The heating interlock is activated. The temperature is above normal (97 degrees). Hot water does not circulate through the system. | What to do:- Check pump, unlock, tighten contacts.
- Unscrew the taps to the end, make sure bypass functionality.
- If the problem occurs when switching to DHW, inspect the secondary heat exchanger.
- Clean filters, remove blockages.
|
F21 | Work stop due to exceeding the nominal value. | Contact the service center. |
F22 | Little coolant in the circuit. | Turn on system recharge. Inspect the expansion tank for damage; leakage connections. Seal or replace a damaged assembly. |
F23 / F84 | Pressure drop, reduced fluid level. Inconsistency in the sensor readings of the flow and return lines. | - Diagnostics of connectors of sensors, cables, contacts.
- Adjustment of the pump.
|
F24 | Problems with the movement of the coolant. Rapid temperature rise (more than 10 degrees per second). | - Unlock, turn on the pump.
- Opening tap, bypass.
See F20. |
F25 | A lot of smoke in the system, carbon monoxide comes out. | - Check if the size of the outlet pipe complies with the regulations. Perhaps she does not smoke well.
- Check for traction.
- Check the thermostat.
Do not install an electric hood. |
F26 | Low voltage on the gas valve engine. Engine malfunction. | Inspect the connector and install a working engine. |
F27 | The system reports a flame, although the fuel supply is shut off. | Diagnose:- Ionization electrode.
- Shutoff valves.
- Electronic module.
|
F28 / F29 / F68 | The flame goes out during ignition. | Verification:- Gas fittings, valves, valves.
- Adjust valve settings.
- Clean the filters.
- Clean the electrodes from corrosion, place them closer to the burner.
|
F30 | The lock sensor circuit is open. | Connection of a working sensor. |
F31 | Short circuit blocking element. |
F32 | Incorrect fan operation. The function "Antifreeze" is turned on. | Turn off the mode in the summer. |
F33 | The antifreeze mode works. Problems with the pressure sensor. | Inspection and replacement of parts. |
F35 | Problems with carbon monoxide removal. | Clean the chimney. |
F36 | Traction problems. | Bring the lit match to the boiler control window. If the flame deviates to the side - there is a draft, it burns exactly - no. |
F37 | Incorrect fan operation. | Cleaning fan components, engine repair. |
F38 | Frequency exceeds established standards. | Contact a service center. |
F39 | Problems in the diagnostic system. |
F41 | Incorrect fuel setting. | Adjust the settings. |
F42 | The encoding resistor is out of order. | Diagnostics of resistor R1 on the control board. If the wrong code is set in the menu, error F70 will additionally flash. |
F43 | Unit model not identified. | After using the new board, no adjustments have been made. |
F49 | Short circuit tires e-BUS. | Measure the voltage supplied to the bus. |
F55 | An error has occurred in the operation of the heating sensor. | Tighten the pins, connect the whole wiring or a working sensor. |
F58 | There is no connection with preheating. | Call the wizard. |
F60 | Problem with fuel valve control + | - Inspection of connections, contacts of all nodes with the control module.
- Module replacement.
- Reboot technology.
|
F61 | Malfunctions in valve control - |
F62 | The fuel valve is off. |
F63 | EEPROM malfunction. |
F64 | Flow sensor parameters change rapidly. |
F65 | Temperature rise of the electronic module. |
F67 | The flame signal on the module is broken. |
F70 | Incompatibility of the main module with boiler control. | Incorrect code entered. Change the settings or call a specialist. |
F71 | The hot liquid thermistor is open. | Check wiring. |
F73 | Damage to the heating pressure sensor. | The item is disabled. | Insert the plug into the connector, connect a working sensor. |
F74 | Problems with the electrics. |
F75 | The water pressure sensor does not see a pressure increase when the pump is turned on. | The pressure sensor is broken. Pump is clogged with debris. | - Clean the sensor or pump.
- Check wiring, fittings at the inlet and outlet.
|
F76 | The primary fuse thermal fuse has failed. | Replacement. |
F77 | The condensate pump is not functioning. | Make sure the pump and smoke exhaust valve are working. |
F80 | SHE error on the incoming line. | Contact the service center. |
F81 | Pump error. |
F83 | No rise in temperature. Not enough water. | Bleed the air, turn on the makeup. |
F90 | The APC module is not connected. | Check your connections. |
F91 | Malfunction of the APC module. |
Experts recommend once a year to prevent breakdowns: clean parts and the chimney, remove scale from the heat exchanger. Then you don’t have to fix technical problems.