If you encounter problems when operating a gas boiler, the 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 Gepard boiler on the display. The decoding of the code indicates where to look for a malfunction and how to repair the device yourself.
The series is represented by double-circuit and single-circuit boilers. The former 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 Gepard” include indirect heating boilers. The combustion chambers in both designs can be open or closed. If there is 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 turbocharged burner with exhaust gases through a coaxial chimney is suitable.
If you did not find answers to your questions in your instructions, in the table we have listed all the malfunctions of Protherm Gepard boilers. You will learn how to make repairs with your own hands.
Problems with NTC temperature sensors.
supply line. Contacts open, no signal.
Inspect cables and wiring, tight connections. Replace defective element.
F01 Return line. F02 DHW. Contact problems. F03 Boiler. F04 Collectors. F05 Bypass products. F06 Traction. F07 Solar collector on return flow. F08 Water heater grounding. F09 Hoods. F10 Heating thermistor failure. The feed sensor has broken. Short circuit (short circuit). Ringing of parts, installation of serviceable elements. Diagnostics of connections, wiring, cable replacement. F11
Short circuit of the sensor on the return.
F12/ F13 DHW tank. F14 Collector. F15 Combustion products. F16 Traction. F17 Returns on the solar collector. F18 Heater grounds. F19 Hoods. F20 The heating blocker has switched on. The temperature is above the norm (97 degrees). Hot water does not circulate through the system. What to do:
- Check the pump, unlock, tighten the contacts.
- Unscrew the taps to the end, make sure that the bypass is functional.
- If the problem occurs when switching to DHW, inspect the secondary heat exchanger.
- Clean filters, remove blockages.
F21 Stop operation due to exceeding the nominal value. Contact the service center. F22 Too little coolant in the circuit. Power up the system. Inspect the expansion tank for damage, connections for leaks. Seal or replace damaged assembly. F23/ F84 Pressure drop, liquid level reduced. Inconsistency in the sensor readings of the supply and return lines.
- Diagnostics of sensor connectors, cables, contacts.
- Adjustment of the pump.
F24 Problems with the movement of the coolant. Rapid rise in temperature (more than 10 degrees per second).
- Unlocking, turning on the pump.
- Opening the tap, bypass.
See F20.
F25 A lot of smoke in the system, carbon monoxide comes out.
- Check if the size of the discharge pipe complies with the regulations. Maybe it doesn’t expel smoke well.
- Make sure you have traction.
- Check thermostat.
Installation of an electric hood is prohibited.
F26 Low voltage on the gas valve motor. Engine malfunction. Inspection of the connector and installation of a serviceable engine. F27 The system reports the presence of a flame, although the fuel supply is shut off. Run diagnostics:
- Ionization electrode.
- Stop valve.
- Electronic module.
F28/ F29/ F68 Flame goes out when ignited. Examination:
- Gas fittings, valve, valve.
- Adjustment of valve settings.
- Clean filters.
- Strip the electrodes from corrosion, place them closer to the burner.
F30 Lock sensor circuit open. Connecting a working sensor. F31 Short circuit of the blocking element. F32 Incorrect fan operation. The anti-freeze function has been activated. Turn off the mode in the summer. F33 Antifreeze mode active. Problems with the pressure sensor. Inspection and replacement of parts. F35 Problems with carbon monoxide removal. Clean out the chimney. F36 Traction problems. Bring a lit match to the control window of the boiler. If the flame deviates to the side – there is thrust, it burns evenly – no. F37 Incorrect fan operation. Cleaning of fan components, engine repair. F38 Frequency is out of range. Contact the service center. F39 Malfunctions in the diagnostic system. F41 Incorrect fuel setting. Adjust settings. F42 Coding resistor has failed. Diagnostics of the 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 were made. F49 e-BUS short circuit. Measure the voltage that is applied to the bus. F55 An error has occurred in the operation of the heating sensor. Tighten the contacts, connect the whole wiring or a working sensor. F58 No communication with preheat. Call the master. F60 Fuel valve control problem +
- Inspection of connections, contacts of all nodes with the control module.
- Module replacement.
- Reloading technology.
F61 Valve control malfunction – F62 Fuel valve off. F63 EEPROM failure. F64 Flow sensor parameters change rapidly. F65 Electronic module temperature too high. F67 The flame signal on the module is broken. F70 Incompatibility of the main module with the boiler control. Wrong code entered. Change settings or call a specialist. F71 Hot liquid thermistor open. Wiring check. F73 Failure of the heating pressure sensor. The element is disabled. Insert the plug into the connector, connect a working sensor. F74 Electrical problems. F75 The water pressure sensor does not see an increase in pressure when the pump is turned on.
The pressure sensor is broken.
The pump is clogged with debris.
- Clean sensor or pump.
- Check the wiring, fittings at the inlet and outlet.
F76 Primary radiator thermal fuse has failed. Replacement. F77 Condensate pump not working. Check that the pump and smoke exhaust valve are working properly. F80 SHE error on incoming line. Contact the service center. F81 Pump error. F83 Temperature rise does not occur. Not enough water. Bleed the air, turn on the make-up. F90 APC module not connected. Check connections. F91 APC module failure.
Experts recommend once a year to prevent breakdowns: clean the parts and the chimney, remove scale from the heat exchanger. Then you don’t have to fix technical problems.