Proterm company heaters are equipped with a self-diagnosis system. Due to this, errors in the operation of the Leopard boiler are displayed in the form of codes on the display. Deciphering them will help determine the location of the problem in order to quickly restore the device's performance.
Features of the operation of the boiler Protherm Leopard
The device has a cast-iron base, which gives a high efficiency of 90-92%. A double-circuit gas boiler works simultaneously for heating and hot water supply (DHW). The design is equipped with a pipe-in-pipe bithermic heat exchanger. Water circulates through the outer tube for the heating system, and through the inner tube for hot water.
The built-in “Winter-Summer” mode allows saving on fuel consumption. The boiler can run on gas from the main or from a cylinder. The combustion chamber is open and closed.
Error Codes
Typically, the manufacturer indicates the meaning of the fault in the instruction manual. But not everyone understands the technical language, in addition, the user manual may be lost. Therefore, we provide the decryption in the table.
Display Symbols | Value | Remedy |
A6 | Low room temperature. | If the temperature drops to 0 degrees, the equipment will freeze. Connect a radiator to heat the room. |
F0 | The pressure has dropped below 1.5 bar. | What to do:
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F1 / F29 | The flame went out. The lightning lamp flashes. | The fuel supply has stopped:
|
F2 | The water sensor in the heating system has failed. | Measure the resistance of the sensor, inspect the integrity of the wiring, tighten the connections. |
F3 | The appliance has overheated. | What to do:
|
F4 | The DHW temperature sensor is not working. The lightning diode blinks. | Tighten the contacts from the sensor to the electronic board. Replace the defective item. |
F5 | External temperature sensor defective. If not, the system gives a signal of power outages. |
|
F6 | Damage to the differential relay, fan, traction sensor. | Check:
|
F7 | Communication problems. There is no contact between the LCD and the electronic module. |
|
F8 | Damage to the fuel supply valve. | Diagnostics of wiring, valve coil. |
F9 | Settings failed. | Reconfigure metrics. |
F10 | Short circuit (short circuit) of the temperature sensor on the feed. | Testing with a multimeter, installing a new part. |
F11 | Short circuit of the NTC controller on the reverse. | |
F12 / F13 | Short circuit NTC hot water heater. | |
F14 | Closed the NTC collector. | |
F15 | Short circuit NTC exhaust gas. | |
F16 | Short circuit NTC traction. | |
F17 | Short circuit NTC collector return. | |
F18 | Short circuit NTC grounding water heater. | |
F19 | Short circuit NTC hoods. | |
F20 | The thermal fuse is activated. | Reduce circuit temperature, inspect fuse. |
F21 | Device lock due to increased setpoints. | Contact the service center. |
F22 | There is little water in the system. |
|
F23 / F72 | Not enough fluid. Thermosensors on both lines give different readings. | Make sure the sensors are working. |
F24 | The amount of coolant is reduced. The temperature rises too fast. | Similar to F22. |
F25 | When the mixer is opened, too hot water is poured. | Adjust the thermostat. |
F26 | The current of the valve winding is not normal. | Call specialists. |
F27 | There is a flame signal in the burner, although no fuel is supplied. | Diagnosis and replacement of the ionization electrode. Inspection of contacts, wiring. |
F28 | The first attempt to set fire failed. | Try again. |
F30 | The contacts of the blocking sensor are open. | Repair the circuit, put the work item. |
F31 | Short circuit blocking sensor. | |
F32 / F33 | The "Anti-freezing" mode is on. The fan does not rotate correctly. | Correct the rotation of the fan, turn off the mode in the warm season. |
F35 | Poor combustion products. | Clean:
|
F36 | Determination of traction. For products with an open combustion chamber. | Light a match and bring it to the control window. If there is traction, the flame will deviate to the side. Otherwise it will burn evenly. |
F37 | The fan blades rotate outside the normal range. | Connection Diagnostics. |
F38 | When measuring, the frequency does not meet the standards. | Call the wizard. |
F39 | Error in self-diagnosis. | |
F41 | The fuel supply is not adjusted correctly. | Change the settings. |
F42 | Faulty coding resistor. | Checking item status. |
F43 | The model of technology is not identified correctly. | Contacting the service. |
F49 | Low voltage on eBus. | |
F55 | Problems with the CO sensor. | |
F58 | No contact with preheating. | |
F60 | Problems with fuel valve control + | |
F61 | Problems with gas valve regulation - | |
F62 | The valve does not work. | |
F63 | EEPROM problems. | |
F64 | AOS error. | |
F65 | Electronic parts are overheating. | |
F66 | The IIC bus is not working properly. | |
F67 | Flame error. | |
F70 | OSN issues. | |
F71 | Opening the water flow sensor. | Tighten the connections. |
F73 | Poor pressure sensor connection. | |
F74 | Problems with the wiring of the pressure controller. | Replacement loop. |
F75 | The pump is on, but the pressure does not rise. | System restart. |
F76 | The thermal fuse on the primary radiator is out of order. | Installing a working fuse. |
F80 | SHE error. | Ask a specialist for help. |
F81 | Circulation pump malfunction. | |
F82 | Problems with the anode tester. | |
F90 | No connection to APC module. | |
F91 | The sensor is faulty on the APC module. |
Users sometimes complain that the Leopard boiler is humming and noisy during operation. Check the heat exchanger for scale. If the tubes are overgrown with plaque, clean. For this, a reagent pump is used. The system is pumped, then flushed with clean water.
At the first sign of a malfunction, do not delay the repair. Inspect the equipment, find the cause of the breakdown. Sometimes it’s just the wrong settings, then you should follow the instructions. If you smell gas in the room, quickly turn off the valve and contact the gas service.