Of course, most readers are concerned about the issue of “technical treatment” of heating devices and ways to eliminate the problem. Before covering this issue, you need to know the device, product characteristics and its capabilities.
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The diagram shows the structure of a Proterm gas boiler from a Czech manufacturer.
Technical characteristics of the Leopard gas boiler
The main technical indicators include:
- Efficiency: 90-92%.
- Possibility of adjustment: “winter-summer”.
- Function of heating water in boilers.
- Installed overheating protection.
- Possibility of working in several directions: on main gas and liquefied coolant.
- The gas boiler is made on a cast iron base.
This is the minimum set of technical characteristics for the common man that you need to know about. More detailed information is indicated in the technical data sheet attached when purchasing the product.
F1. Loss of flame.
The error appears when there is no gas supply to the burner.
Probable Causes
- The shut-off valve has tripped. In emergency situations, it blocks the main pipe and the boiler stops. After eliminating any error on the Proterm Leopard display, do not forget to put the lever into working condition.
- Clogged gas filter mesh.
- Problem with the counter. It is sealed, and you will have to call a technician.
- A sharp drop in pressure in the line. In this situation, nothing depends on the owner of the facility connected to the central gas supply system; just call the emergency service. If Proterm Leopard receives “blue fuel” from a gas tank or from a cylinder group, the solution is clear - refuel, change the empty tank.
A flame loss error that appears during the initial start-up of the boiler indicates a problem with the chimney: an incorrectly drawn up diagram, unprofessional installation. Poor draft, blowing out the burner with gusts of wind lead to an emergency stop of the Proterm Leopard.
Types of Proterm gas boilers are the most interesting for the domestic market
There are many modifications on sale. The most common are gas two-chamber boilers with biometric heat exchangers: Leopard and Lynx. The equipment is made at a high technological level and complies with EU standards. However, no matter how good the technology is, it has the ability to fail at the most inopportune moment. Read below about malfunctions of heating devices and troubleshooting methods.
Do you know how to properly arrange the chimney of a domestic gas boiler? Find out: are there gas boilers without a chimney?
F0. Pressure drop in the heating circuit.
Its normal value for Proterm Leopard is 1.5 bar. It is easy to replenish the volume using a special valve at the bottom of the boiler (blue). But if the unit stops again after a short period of time and the same error appears on the display, you need to figure it out.
Location of the feed tap in the boiler
Probable Causes
- Leak. It can occur in Proterm Leopard itself (for example, in a heat exchanger, expansion tank), heating radiators (broken seams) and places where pipes are connected to them.
Recommendation:
It’s not difficult to identify, you just need to carefully inspect the entire route. Wet spots and puddles on the floor will indicate the “culprit” for the F0 error.
- Pressure meter. It is located under the boiler casing. Before changing it, you should make sure that the signal wires are intact, there are no short circuits, and the contacts are reliable.
- Pump. Its breakdown or incorrect operation lead to a decrease in pressure in the circuit and error F0 Proterm Leopard. This is caused by several factors:
- lack of supply voltage;
- tight rotation of the impeller due to salt deposits, shaft deformation or oxidation, or bearing splitting.
Recommendation:
Remove the pump from the boiler and carry out maintenance. If the heating system with Proterm Leopard has a low-quality coolant, then in most cases it helps restore the functionality of the pump.
Gas boiler Proterm Leopard equipment malfunction.
There are certain error codes that help you understand what happened to the equipment. The most common malfunctions of the Leopard 24 boiler.
F0
Signals us about a decrease in incoming water pressure with readings below 0.6 bar. When the heating water pressure is low, the system turns off automatically. This is indicated by the built-in diode (see the “Pointer” symbol).
In this case, you need to increase the value of the incoming liquid to 1.2-2 barrels. After the pressure has stabilized, the boiler will automatically resume operation in the planned mode.
F1
The flame disappeared. The gas supply was interrupted and the wick went out. You need to pay attention to the emergency thermostat. Try to restart it.
Another reason could be a switched off draft sensor (we are talking about boilers and chimneys).
Another problem that affects the disappearance of the flame is that the wires are mixed up: phase and neutral.
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Loss of flame can be caused by a problem with the automation responsible for ignition, the gas valve and malfunctions in the control system.
F2
The heating water sensor has failed. In this case, the malfunction is caused by a break in the above element. Perhaps the t0 of the cooling water has gone below 30C. The system is disabled. It is necessary to check the resistance of the sensor. Pay attention to the cables running from the sensor to the control panel. Find out t0 OB, inspect the system for freezing.
F3
Often malfunctions of the Leopard 24 gas boiler are associated with overheating. After cooling down, the system resumes its operation. You need to check the heating pump: it may be clogged.
Photo: Heat exchanger of the Leopard 24 gas boiler.
You should check the condition of the heating filter and check the heating water heat exchanger. The reason is still the same: clogging of the working elements.
We recommend watching a very short video that clearly shows the clogging of working elements.
On a note . When working, use the non-freezing mixture recommended by the manufacturer: “AlycolTermo”.
F4
The water sensor has failed. A short circuit has occurred in the sensor responsible for the t0 mode of the tank. In this case, the boiler will continue to operate in the “Heating water heating” mode.
Heating of incoming water is turned off.
The reason may lie in the resistance of the sensor. Please note that if the circuit is broken, the error code is not displayed! The control unit will indicate that the storage tank or sensor is not connected.
F5
The external sensor operating in the equithermal adjustment mode has failed. You should pay attention to the correct connection of the sensor and the element itself.
It is clear that this is an incomplete list of possible technical failures in the operation of Proterm gas boilers.
More detailed instructions and errors are indicated in the technical documentation. In addition, you can gain knowledge on the Internet.
There are plenty of videos online that talk about problems and how to fix them.
For example, find out how and with what to clean the heat exchanger at home.
Without a doubt, some problems can be fixed on your own. But most breakdowns require specialist intervention.
Other faults
The boiler does not turn on due to:
- no power supply, check the serviceability of the network connection, the network voltage, if it is less than 220V, install a transformer;
- low pressure in the gas line, contact the gas utility;
- the gas supply is shut off, open the tap;
- there is no draft, make sure that the chimney is not clogged and the fan is working properly;
- the electrode is not installed correctly relative to the jets, adjust the value between the electrode and the jets;
- The gas valve is faulty, replace it with a new one.
The boiler is usually humming due to a large amount of deposits in the heat exchanger, flush the heat exchanger, air may get into the system, remove air, the fan or pump may be faulty, check their operation.
Proterm boiler diagram
Insufficient water pressure in the hot tap, check and wash the filters, if they are deformed or torn, replace them.
The flame is orange and burns unevenly - this happens if the burner and jets are dirty, clean them of soot with a brush and rag, blow the jets with a hairdryer.
Experts warn and recommend
In matters of safety and high-quality elimination of technical failures in the operation of gas-fired boilers, you must seek the help of specialists from a service center.
The Proterm Leopard gas boiler shows a malfunction of 104. You should not take risks and self-medicate.
This can lead to serious problems. Consequently, you will have to shell out money from your pocket for unplanned re-repairs. When choosing a technical assistance center, pay attention to the availability of certificates and the duration of the center’s operation: how long the company has been providing this type of service.
Speaking of quality, there is no point in using workshops located near your home. Moreover, the masters come to you at the specified address.
Carry out regular equipment maintenance. This is the key to stable operation of a gas boiler.
Check out the rating of the best gas boilers, and what you should pay attention to when choosing heating equipment
Gas boiler double-circuit wall-mounted Bosch 6000
On a note!
- Protherm Leopard boilers are available in several modifications. The difference is in power, type of combustion chamber and method of smoke removal (BTV - forced, BOV - natural draft). In all other respects, the design is identical, and therefore errors for all versions of heating equipment of this brand are interpreted in the same way.
Protherm Leopard control panel discontinued
Protherm Leopard control panel
- Whatever code appears on the Proterm Leopard display, you need to start the investigation by turning off and restarting the boiler. This is done with the main switch (on the lower end of the device, at the place where the pipes are connected: indicated by REZET). Access to it is free; you do not have to remove the casing.
Solved Protherm Leopard board IRIS1.0 error F1
I still can’t get the exact letter and numbers of the model from the servicer. IRIS1.0 board. Atmospheric boiler. On the table, F1 appears with a strange symptom. It starts, reaches a spark, but the spark lasts less than a second and naturally goes to F1. However, during ignition nothing comes to the modulator. If during this short time of spark supply you manage to simulate a flame, then the board functions normally and voltage appears on the modulator. If during this operation you simulate an extinguished flame, then the board turns on the modulation fully (judging by the glow of the light bulbs) and the duration of the spark is normal 7-8 seconds.
I can’t understand why the initial spark has such a short duration, as if the board detects some kind of error when it is initially turned on, although it does not show any other errors. Someone on the forum wrote that his board (albeit SYMSI7.0) even checked the ignition transformer, although I have never encountered this. Just in case, I’ll say that the resistance of the primary winding of the high-voltage transformer ZIG 2/12 shows 920-980 kOhm (depending on the connection of the multimeter probes). In semiconductor testing mode it shows 1140, but only in one direction. Until now, there has never been a need to make such measurements, so I will ask you about the compliance of these readings with the norm.
In general, I ask for your magic kick in the right direction, otherwise my knowledge of the nuances of the operation of this board is still leading me to a dead end.
Theorist65
Pro Tips
Imported equipment is sensitive to supply voltage parameters. Heating boilers are no exception, often producing false errors. To minimize the risk of Proterm Leopard stopping for this reason, it is recommended to connect it to the network via a UPS. The advantage of this solution is that the power supply will ensure uninterrupted operation of the unit even if the power supply is temporarily interrupted. During what period depends on the total capacity of the UPS batteries: from 4 hours or more.
When searching for the cause of an error on the boiler display, it is necessary to check the tightness of the plugs and the reliability of the electrical contacts. During operation, the structural parts of Proterm Leopard vibrate slightly and the quality of the connection may be impaired. According to statistics, about 45% of problems are caused by this factor.
If the result of self-diagnosis of the boiler and heating system is negative, the fault is in the Proterm Leopard electronic board. You'll have to contact a specialist.
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Recommendations for the user
- If any error is displayed, not just code f1, you should not immediately look for the cause of the malfunction. The first thing to do is to restart the boiler (REZET switch). In 85% of cases, its performance is restored.
- If the fault code appears again, you should check the set parameters. Incorrectly “clogged” power of Proterm Leopard often causes error f1.
- During the initial start-up of the boiler, it may be caused by phase reversal. The wall-mounted Proterm is connected to the 220/1f network, and if “0” and “F” are mixed up, its automation will generate an emergency signal. You need to remove the plug from the socket, turn it 1800, insert it and repeat the start.
Probable errors and causes of occurrence
This article contains all possible malfunctions and options for eliminating them, as well as error codes for Protherm boilers.
All information is read in the following order: code - name - possible malfunction. If you have any additional questions, please leave them in the comments to this article. The content of the article
- Error code F00 - Heating temperature sensor malfunction (NTC2)
- Error code F01 - Heating temperature sensor (NTC5) is faulty
- Error code F10 - Heating temperature sensor (NTC2) is faulty
- Error code F11 - Damage to heating temperature sensor (NTC5)
- Error code F13 - Boiler sensor malfunction (NTC 1)
- Error code F20 - Overheating fault (97C measured by heat flow sensor) (NTS)
- Error code F22 - Error: there is no water in the installation (less than 0.3 bar) (Cp)
- Error code F23 - Error: the maximum difference between the flow and return temperatures has been reached (35K) (NTS)
- Error code F24 - Water circulation fault (temperature rises faster than 10K/s) (NTC2, NTC5)
- Error code F25 - Error in the entry of combustion products (only for options with an open chimney) (K11)
- Error code F26 - Error: lack of required current through the gas valve of the stepper motor
- Error code F27 - Error in receipt of flame signal (ionization current) despite closed gas valves
- Error code F28 - No flame detected during ignition
- Error code F29 - Error: loss of flame during burner operation (FL)
- Error Code F33 - Differential Relay (Pr) Malfunction
- Error code F42 - Coding resistor malfunction
- Error code F61 - Main circuit board error
- Error code F62 - Electronic board error
- Error code F63 Main board error
- Error code F64 - Main circuit board error
- Error code F65 - Electronic board error
- Error code F67 - Boiler main board error
- Error Code F68 - Flame Signal Fluctuation (FL)
- Error code F70 - The user interface is not compatible with the electronic board
- Error code F72 - Constant temperature difference between flow and return sensor (NTS)
- Error code F73 - Thermal circuit pressure sensor (Cp) malfunction
- Error Code F74 - Pressure Sensor Electrical Failure
- Error code F77 - External hardware malfunctions
- Error code F83 - Error: there is no water in the installation and the temperature does not rise when the burner is lit (NTC2, NTC5)
- Error code F84 - Constant temperature difference between flow and return sensor (NTC2, NTC5)
- Error code F85 - Malfunction of flow and return sensors (NTC2, NTC5)
- Errors in Proterm floor-standing boilers
- Error F1 - Loss of flame
- Error F2 - Malfunction of the boiler temperature sensor
- Error F3 - Protherm boiler overheating
- Error F4 - Boiler sensor malfunction
- Error F5 - Malfunction of external temperature sensor
Error code F00 - Heating temperature sensor malfunction (NTC2)
Feed sensor (NTC 2) is disabled.
Error code F01 - Heating temperature sensor (NTC5) is faulty
Return sensor (NTC 5) is disabled.
Error code F10 - Heating temperature sensor (NTC2) is faulty
Short circuit of the feed sensor (NTS).
Error code F11 - Damage to heating temperature sensor (NTC5)
Short circuit of the return sensor (NTC 5).
Error code F13 - Boiler sensor malfunction (NTC 1)
Sensor short circuit: shunt instead of sensor at X16:
- Check sensor connections.
- Check sensor cables.
- Check the sensor.
Error code F20 - Overheating fault (97C measured by heat flow sensor) (NTS)
There is no heating water flow through the Protherm boiler circuit:
- Make sure the pump is working properly.
- Unlock the pump.
- Make sure the heating valves are open as well as the bypass.
- Check the condition of the plate heat exchanger if the fault occurs in hot water mode.
- Check the condition of the thermal filter.
Error code F22 - Error: there is no water in the installation (less than 0.3 bar) (Cp)
- Heating system leaking - fill the system.
- PSC leakage - make sure there are no leaks.
- Expansion tank defective - check the expansion tank.
Error code F23 - Error: the maximum difference between the flow and return temperatures has been reached (35K) (NTS)
Problem with water circulation (low flow):
- Check the thermal output and return sensor connectors.
- Check pump speed.
- See error F20.
Error code F24 - Water circulation fault (temperature rises faster than 10K/s) (NTC2, NTC5)
Poor pump performance or low water pressure:
- See error F20.
- The heating taps are closed, the bypass is not working.
- The pump is switched off or blocked.
Error code F25 - Error in the entry of combustion products (only for options with an open chimney) (K11)
The protection device (K11) in the draft outlet has detected excess smoke.
Troubleshooting help:
- Check the exhaust pipe (connector, length, diameter, whether it is blocked or the chimney).
- Check the air flow into the room.
- Check the thermostat.
Electrical hoods are prohibited in the room with the device.
Error code F26 - Error: lack of required current through the gas valve of the stepper motor
Stepper motor is disabled or faulty:
- Check the stepper motor connector.
- Check the engine.
Error code F27 - Error in receipt of flame signal (ionization current) despite closed gas valves
Process logic violation:
- Check the flame detection electrode.
- Check the main board of the Protherm boiler.
- Check the tightness of the gas fittings.
Error code F28 - No flame detected during ignition
- Incorrect gas valve settings - check gas valve settings.
- Gas valve is faulty - check the gas valve.
- The ignition electrodes are faulty - check the condition of the electrode (corrosion).
- Poor grounding - fix it.
Error code F29 - Error: loss of flame during burner operation (FL)
- Insufficient or no gas - check the gas supply circuit (gas valve is open).
- Carbon deposits on the ionization electrode - check the condition of the electrode (corrosion).
- The ignition and flame control system is faulty - check the ignition circuit connections.
Error Code F33 - Differential Relay (Pr) Malfunction
The switch does not go to the off position. (OFF) when the fan is in the off position:
- Check the differential relay (manostat).
- Debris in the air flow control system path (Pitot tube, impulse tube).
- Clogged or icing in the smoke exhaust or air intake duct.
- Frontal wind pressure.
Error code F42 - Coding resistor malfunction
Coding resistor is not at the expected value - check the coding resistor (R1) in the diagram.
Error code F61 - Main circuit board error
Gas valve control malfunction:
- Check all connections to the main circuit board.
- Check the electronic board.
- Check the product code.
- Restart the device.
Error code F62 - Electronic board error
Gas valve closing fault.
Error code F63 Main board error
The main board memory is faulty.
Error code F64 - Main circuit board error
Quick changes to heat flow and return sensor parameters.
Error code F65 - Electronic board error
Main board temperature is too high.
Error code F67 - Boiler main board error
Flame signal fault on main board.
Error Code F68 - Flame Signal Fluctuation (FL)
See error F28.
Error code F70 - The user interface is not compatible with the electronic board
Invalid product code:
- Check the product code.
- Check your card identification number.
Error code F72 - Constant temperature difference between flow and return sensor (NTS)
Heat flow and return temperature mismatch (constant difference):
- Check the temperature sensor connector.
- Replace the faulty sensor.
Error code F73 - Thermal circuit pressure sensor (Cp) malfunction
Pressure sensor shorted or disconnected:
- Check the sensor connector.
- Check the sensor.
Error Code F74 - Pressure Sensor Electrical Failure
Electrical fault of the pressure sensor.
Error code F77 - External hardware malfunctions
External Gas Valve / Condensate Pump - Check equipment connections.
Error code F83 - Error: there is no water in the installation and the temperature does not rise when the burner is lit (NTC2, NTC5)
The circuit is not properly vented - see error F22.
Error code F84 - Constant temperature difference between flow and return sensor (NTC2, NTC5)
- Flow and return temperature sensors are upside down or disconnected - check the temperature sensor connector.
- Faulty temperature sensor - replace the faulty sensor.
Error code F85 - Malfunction of flow and return sensors (NTC2, NTC5)
The flow and return temperature sensors are connected to the same pipe - check the temperature sensor connector.
F6.
Problem with traction. If the boiler is a BTV series (turbocharged), then the cause of the error should be sought in the area where the fan is located. The electronic board does not receive a signal from the corresponding sensor.
Check what
- Condition of electrical circuits.
- Fan performance. It may not be receiving voltage. Breakdown is a rare occurrence. When the blades rotate freely, mechanical defects are excluded; only the electrical part. It is not difficult to ring the motor winding.
Recommendation:
If the cause of the error is not identified, two options are possible - a malfunction of the electronic module or the fan (turn-to-turn short circuit). You can't figure it out on your own, call a professional.
