Error e03 on alfa calor boiler

Alfa calor boiler error codes

It indicates a malfunction of the ignition system. Failure notification comes from flame control sensor. This part analyzes the presence of the flame and stops the Alfa Color boiler when the main burner is weak or when the gas supply is interrupted. Operation stops after three failed starts. To reset, the reset button must be kept pressed. Gas valve malfunction. The gas valve is controlled by the electronics. This component can be checked by determining the resistance and voltage. If it is found that the readings do not correspond to the nominal values, the valve must be replaced. No gas flow into system. The gas distribution device has a valve that closes the gas supply. On this basis, the problem with starting the appliance can be caused by a blocked gas valve. Unsatisfactory contact or no pulse from the flame control sensor detected. Problem with control board. When the ignition is successful but the appliance still suddenly goes out, it is most likely that the electronics do not recognize the flame. In this case it is necessary to perform a test. Problems, at the time of ignition. This circumstance occurs when the ignition does not work or there is a burner flame attenuation. Check contacts between ignition device and flame electrode as well as between control board and gas valve. The main reason for the burner flame failure is a poor draft.

The problem with overheating of the heat exchanger of Alfa Calor boiler. Appliance locks up. Safety thermostat overheating thermostat tripped. The temperature sensor and over-temperature thermostat are normally located on the outlet tube of the primary heat exchanger. Main thermostat target. is the protection of the boiler unit against increased temperature. The malfunction is most often caused by problems with the thermostat, temperature sensor, or failure of the main circulation circuit. Temperature sensor defective. Incorrect signal is being sent to the electronic board or contact between the sensor and control board is broken. The overheating thermostat is out of order. If the component is functional, but the actual overheating of the fluid is detected, there is most likely a problem with the coolant circulation in the heating circuit. Clogging of the main heat exchanger or the filter element of the heating circuit (low circulation implies a high heating of the coolant). The circulation pump is broken or there is an air lock in the heating system.

Indicates a low pressure in the system. Possible reasons for this malfunction: low pressure in the heating circuit. Contact between control board and pressure sensor broken. Minimum pressure switch breakage. We recommend that you look at the results of the pressure gauge beforehand. In many cases, the failure can be corrected with a make-up valve, which is installed to fill the system with coolant. When the failure reappears, there may be a water leak. The circulation pump, main heat exchanger, safety valve to relieve excess pressure, worn sealing elements, make-up valve and other parts may be leaking. Leakage can be detected by inspection of hydraulic components.

No draught. In order to ensure the safe and reliable operation of the gas boiler Alfa Color need to ensure the draft to remove the products of combustion. The gas outlet is controlled by the automatics, and if there are any problems, the traction sensor is triggered and the gas appliance is blocked. Possible reasons for the chimney draught failure: small chimney duct size, incorrect installation, dirt, ice on the walls. The restriction of the chimney diameter causes insufficient draught. The length of the chimney pipe is exceeded We advise you to carefully study the installation instructions of the appliance and meet all the necessary requirements. Long horizontal chimney section may cause lack of proper draught. Damage to the sensor by draught. If there is a vacuum in the supply pipe, you can hear a characteristic click. Contact between pressostat and control board is faulty, there is condensation in tubes or tubes are badly connected to pneumovalve. Operation of the fan is interrupted. Fan impeller clogged. Fan shaft is not lubricated, resulting in low fan speed. Contact between control board and fan is faulty.

Failure of domestic hot water sensor to detect temperature. This means that the domestic hot water temperature sensor is defective or the temperature required for operation has increased substantially. The main factors that can cause this malfunction: Hot water temperature sensor broken. No contact between hot water temperature sensor and electronic board. Control board faulty. When the temperature sensor of the hot water supply works and steadily contacts the control board, but at the same time the boiler gives an error, then perhaps the control board has a defect.

The temperature sensor of the heating circuit is not functioning properly. It signals a faulty temperature sensor in the heating circuit or the temperature required for operation is too high. Circuit breakage of temperature sensor in the heating circuit. This fault occurs when the temperature sensor contact with the control board is broken, or the temperature value is below the recommended value. Within 5 seconds of identifying the fault, the Alfa Kalor boiler must resume its functions, if the fault occurred spontaneously. Verify that there is no moisture on the temperature sensor connector and control board connector. The temperature sensor in the heating circuit is short-circuited. This malfunction can occur when the temperature sensor contacts short-circuit, or the temperature of the thermal fluid is higher than normal. First you need to measure the resistance of the sensor. If the resistance parameters differ from the nominal, change the temperature sensor. If replacing the temperature sensor does not help, repair the board.

Error codes of the most widespread gas boilers and their meaning

With the development of individual heating and hot water supply, more and more households have become owners of gas boilers. The modern unit is very compact, efficient and has a long service life and self-diagnostic system. If the boiler stops producing heat, an error code will appear on the operating screen, which will prompt the user as to the source of the malfunction. The factory instructions clearly indicate not only the possible malfunctions but also the actions to be taken to eliminate the boiler faults. Many of them users can eliminate by their own forces, but if they are associated with a violation of the integrity of the working elements, you need to repair or replace them, the latter is better to perform through the service center, especially if the unit is under warranty service.

Main errors of Alfa Color boiler

Alfa Color boiler does not ignite. No gas access to the burner device. Distribution valve on the gas supply pipe is closed. Open the distribution valve. Expel air from the piping if the initial start-up of the appliance is performed. Check the gas pressure to the gas fitting. The required pressure parameters are specified in the boiler documents. The gas pressure at the nozzle must be adjusted (minimum / maximum). Functional failure of the gas valve. The gas valve must be replaced if it is defective. Unstable functioning of the ionization electrode or its breakage. Check and adjust the distance between the ignition electrode and the burner. Clean the ionization electrode if contamination is found. Component failure of the gas block, including a short circuit or damage of the coil contacts of the gas valve. If such irregularities are found, replace the gas valve. Plug of gas valve stuck. There is a connection on the outside of the valve. Attach a silicone socket to it and release excessive pressure. The ignition output of the Alfa Calor boiler is insignificant. Use the service menu of the boiler and adjust the required output. Electronics board is defective or has malfunctioned. If the ignition mechanism does not work, reset the appliance to zero. If the error E01 appears again, repair or replace the circuit board. After that, check the ground connection. The presence of a charge on the cladding is not allowed. Blockage of the unit can occasionally occur because of an excessive amount of condensate. Ionisation electrode, combustion chamber and gas burner must be cleaned thoroughly. Ionization electrode is broken. There is no flame on the gas burner, but it is determined by the control board. There is a contact or short circuit in the wiring from the electrode to the electronics unit. Test the electrical connections and repair the fault.

Reduced pressure in the system. Alfa Color gas boiler reports error H20 when the water in the heating circuit is low. Broken connections from the differential pressure switch to the control module. The differential is defective.Pressure switch. First of all check what values the pressure gauge shows. If pressure has dropped, add fluid to the heating system. The unit is equipped with a make-up valve to fill with water. If error H20 resumes, check the system for potential leaks. Leaks may be in the hydraulic pump, relief valve, main heat exchanger, or damaged seals and gaskets.

Boiler overheating Alfa Color. The safety thermostat has started to heat up to 103 degrees. Error E02 is not displayed when there is no ignition request at the moment. When the temperature in the heating line rises, the gas burner fades, although the heat exchanger continues to heat. When the temperature of the safety thermostat increases to 103°C, after 20 seconds the boiler switches off due to the activation of the electronic system. When the temperature sensor detects a temperature higher than 100 C in heating mode, the automatics waits for a possible temperature drop for about half a minute. If the temperature of the NTC sensor and the safety thermostat does not drop during this time, the Alfa calor boiler gives error code E02. Blockage during the ignition of the gas burner. When the temperature of the safety thermostat in the flame formation phase exceeds 103C, the electronics reports a fault with an interval of 10 seconds. The activation of the heating thermostat or the emergency overheating thermostat, which will disable the appliance. When the liquid temperature reaches 103°C, the overheating thermostat will turn on. After the machine has cooled down, reset it with the Reset key. Damaged or malfunctioning temperature sensor for overtemperature. Change the air in the pipe line. Circulation of the heating medium too weak in the heating line. If during pressure measurement of the unheated heating circuit it is found that the pressure is low, pour coolant into the unit. Excessive air in the heating pipe line. We recommend using a bleeder valve to bleed air from the system. There is no circulation. For water to circulate properly, fully open the stop cocks on the water pipes. The water circulation pump operates with difficulty. Pump rpm too low. The required mains voltage is not available. If the voltage drops repeatedly, it is recommended to connect the boiler to the power supply via a regulator. Circulation pump motor is broken or there is a short circuit in the stator winding. Slight pressure drop, although the circulation pump is functioning normally. Presumably, the blades are broken, respectively the pump must be replaced. The heating medium is delivered to the circulation pump without stopping and the pump does not rotate. We recommend checking the hydraulic pump for a possible rotor shaft defect. Remove the plug, then turn the rotor shaft of the motor by hand. There is no signal from the control module to the circulation pump, which is explained by the malfunction of the automation module. If current malfunction remains after resetting appliance, replace electronics board. Exhaust gas thermostat overheated. Reset the appliance when the thermostat sensor has cooled.

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Weak draught. Alfa Color boiler operates steadily and safely if there is good draft in the chimney. The electronics system controls that the flue gases do not enter the room, and in case of malfunction, the pneumatic draught relay shuts down the unit with error E03. The main causes of insufficient or no thrust are. The exhaust duct has a narrow opening or has not been installed correctly. Internal walls are clogged or frozen. Allowable length of exhaust duct exceeded. Check proper rules and standards as specified in the operation manual. The pressostat is damaged. Test and replace if necessary. The connection from the leakage air relay to the electronic system is broken. Test the contacts in the circuit and correct the problem. There is condensate and besides pipes to the air relay are incorrectly fastened. Clean condensate and properly connect pipes to thrust sensor. Damaged fan. Impeller of the fan is contaminated. Fan speed too low due to insufficient lubrication of the drive shaft. Damaged connections from the electronic module to the fan.

The temperature sensor in the heating system is damaged. Alfa Color boiler reports error E05 during the increase of the required temperature or because of a defect in the temperature sensor of the heating line. Electric circuit of the temperature sensor for heating is damaged. If the contact between the temperature sensor and the control board is broken, the following problem occurs. Resumption of device functions after a malfunction will follow after 15 sec., If the problem was unexplained. If during diagnostics it is found that there is no condensation on the contacts of the control board and connectors of the temperature sensor, replace the sensor. The connections of the temperature sensor circuit are closed or the water has an increased temperature. First of all check the temperature resistance. If resistance differs from required standards, sensor will need to be replaced. If you have connected a new temperature sensor but error E05 is displayed again, repair or replace the control board.

Damage to the hot water temperature sensor. The automation system of Alfa Color boiler reports error E06 if the hot water temperature sensor is defective or the temperature recommended for normal operation has increased critically. If it is determined that the hot water sensor does not work, it must be replaced. Break contacts between the temperature sensor of the hot water and control board. Inspect the electrical contacts and look for defects. If the connections between the control unit and the sensor are intact and the temperature sensor itself is functional, but the error E06 is still displayed, we can therefore speak of a broken control unit.

Burner failure at the time of ignition. Error E35 reports that the ignition fails due to a burner flame failure. Check the electrical contacts from the ionization electrode to the ignition mechanism or from the control module to the gas valve. Restore electrical connections when problems are detected. At the same time, the lack of draught is the cause of problems leading to flame failure. Inspect the chimney for the presence of clogs.

Boiler Alfa Color Error E 14

Gas heating boiler with auto-diagnostic function Modern gas heating equipment differs significantly in its additional functions and characteristics from the first gas heating systems. And, one of these new and “smart” features is the auto-diagnostic function. But, don’t rush to associate it with the automotive field. We’re talking about gas boilers.

Was at AlfaKalora in September boilers are on sale and well. Have the money buy the most. Alfa calor Building forum. When the lid is removed, the boiler does not start. Cascade system.

And, in this equipment, this function is engaged in that constantly, during the operation of your gas heating boiler, is engaged in informative processing of all the states and values of the various sensors that regulate the operation of the gas boiler. Machine Operation Manual 2H135. The autodiagnostic function also includes tasks to send signals to active elements in the heating system, such as the gas valve, the fan (in the case of gas boilers with closed combustion chamber) and the circulation pump. In the case when your equipment suddenly encounters non-standard situations of its operating state. it can be a stop of gas supply, overheating of the system, insufficient amount of water in the heating system. the autodiagnostic function provides temporary shutdown of the boiler, and on, which is on the panel of your gas equipment, displays information code of malfunction.

error, alfa, calor, boiler

Code, as a rule, looks like a set of numbers, numbers and letters. This function auto-diagnostic not only controls the work of your boiler, but, if necessary, is ready to shut it down and even at the same time to report the reason for which the shutdown was made However, as we have already written, information about the cause of a possible failure pops up in a special code. And, everyone has their own table of explanations for these codes. Unfortunately, there is no universal interpretation of these codes at the moment.

But, with the help of Internet (and more often, just using user manual, usually supplied with boiler), knowing brand, model and manufacturer of your gas boiler, you can easily find explanation of such codes. Below we list the main error codes of some well-known gas manufacturers Error codes for a wall mounted gas heating boiler (for coaxial smoke extraction system, and for separate flue exhaust system) Error 1 Overheating of the gas boiler.

Error 2 Insufficient water level in the heating system. Fault 3 Fault on combustion. Fault 4 No flame. Error 5 Possible open circuit on overtemperature sensor. Fault 6 Fault on temperature sensor (hot water).

Errors of the gas boiler Olical

Olical boiler cannot be ignited. No gas supply to the gas burner. Inlet gas pipe distribution valve is blocked. Open the dispensing tap. Bleed the piping line if the unit is being turned on for the first time. Measure gas pressure to the gas appliance. Refer to owner’s manual for pressure ratings. Also adjust the gas mixture pressure at the nozzle (lowest / highest). Breakage of the gas valve. The gas valve must be replaced if defects are diagnosed. Unstable or damaged ignition electrode. Check and adjust the clearance between the ignition electrode and the gas burner assembly. If you notice a large amount of dust on the electrode, clean it. Breakage of gas train components, including shorted or broken gas valve coil contacts. If these problems are present, install a functioning gas valve. Jamming of the gas valve plug. Valve has a fitting on the front. Fit a silicone hose to the valve and release the overpressure. The ignition power of the gas boiler Olikal is insufficient. Go to the user menu on the appliance and adjust the required power. Control board functions are faulty or the control board is defective. If the ignition mechanism does not work, it is necessary to reset the boiler. If error E1 repeats, replace or repair control board. Next check the grounding. Charge on the liner must not be allowed. The interruption of the appliance operation is occasionally caused by an excessive amount of moisture. Ionization electrode, furnace and gas burner mechanism must be thoroughly cleaned from moisture. Ionisation electrode is defective. No flame on burner, but detected by automation module. Contact fault or short circuit between the electrode and the control module. Test the electrical connections and correct the problem.

Not enough pressure in the system. The Olical gas boiler signals error E4 if there is not enough water in the heating circuit. The connections from the control board to the minimum pressure sensor are broken. Pressostat malfunction. First observe how much pressure is reading on the pressure gauge. If the pressure drops, fill the heating system with a heating agent. For this operation there is a water make-up tap on the boiler. When error E4 occurs again, the system should be inspected for potential leaks. The circulation pump, safety valve, main heat exchanger, and deformed seals and gaskets can be leaking.

The Olical boiler goes into overheating. Emergency thermostat has reached a temperature of 103C. Error code E2 is not displayed if there is no ignition signal in the current period. When the temperature in the main circuit rises, the burner unit goes out, but the heat exchanger keeps on heating. If the temperature of the safety thermostat overheats to 103 degrees, after 20 seconds the boiler will shut down due to the activation of an automatic device. If the sensor detects a temperature higher than 100C in the heating mode, the electronics waits approx. 30 seconds for the probable temperature decrease. If the temperature drop of the safety thermostat and the NTC heating sensor does not occur in the specified time interval, the gas boiler Olical displays error code E2. Blockage on ignition of the burner unit. If the temperature of the overheating high limit thermostat during the flame formation stage is higher than 103°C, the automatic control system causes a fault with a delay of approx. 10 seconds. Triggering of the heating temperature sensor or overheating protection thermostat, which stops the unit. The overheat thermostat will activate if the water temperature exceeds 103 C. After the device has cooled down, reset it with the Reset key. Broken or incorrectly functioning overheating relay. It will be necessary to change it. There is little circulation in the heating circuit. If in the process of measuring the pressure of the cooled heating circuit it is found that it is low, fill the unit with liquid. Too much air in the heating pipe line. Use an auto-air blower to remove air from the pipes. No circulation. For a stable circulation of liquid, it is necessary to fully open the stop valves on the pipelines. Circulation pump is unstable. Pump rpm decrease. Required mains voltage is not available. If the power supply voltage fluctuates repeatedly, connect the boiler to the mains using a stabiliser. Electric motor of the water circulation pump is damaged or the stator winding is short-circuited. Limited head, although operation of the water circulation pump is satisfactory. The impeller is probably damaged, therefore, it is recommended to replace the pump. Heat transfer fluid is delivered to the hydraulic pump without delays, but the pump does not rotate. The pump must be checked for possible deflection of the rotor shaft. Unscrew the plug and turn the rotor shaft of the electric motor by hand. There is no communication between the electronics module and the circulation pump, which means that the automation module has malfunctioned. If the problem occurs again after restarting the boiler, change the control module. Smoke product temperature monitor overheated. Reset the machine when the thermostat relay cools.

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Weak draft. The boiler Olical works reliably and stably if there is a good draught in the chimney. Automation checks that no smoke products can get into the room and if the system detects a malfunction, the pneumatic draught switch blocks the device with error E3. Probable causes of inadequate or no draught. The chimney is too narrow or the flue has not been assembled correctly. Internal walls are clogged or freezing. The maximum permitted length of the flue exhaust duct has been exceeded. Read the standards and regulations in the user manual. The pressostat is defective. It is recommended to test it and replace it if necessary. Connections from the pressostat to the electronic board are broken. Check electrical connections and remedy the faults. Condensate is present and at the same time the pipes are not connected to the pressostat correctly. Remove moisture and correctly connect the tubing to the pneumatic thrust relay. The fan is damaged. Fan blades clogged. The fan does not rotate properly because there is not enough lubrication on the fan shaft. Contacts from the electronic module to the fan are broken.

Temperature sensor in the heating circuit is out of order. The Olical boiler displays error E7 when the temperature increases, or due to a defect in the temperature sensor in the heating system. Heating temperature sensor circuit is damaged. If the contacts between the temperature sensor and the control module are broken, this malfunction occurs. After a malfunction, it will take 10 seconds for the unit to return to normal operation if the malfunction was accidental. If upon checking the temperature sensor connector and the electronic board contacts do not exhibit condensation, replace the sensor. The temperature sensor circuit connection is short-circuited or the fluid temperature is too high. Check first of all the resistance on the temperature sensor. If the resistance deviates from the required standard, the temperature sensor should be replaced. If you have installed a functioning temperature sensor, but the problem repeats again, repair or replace the control board.

Trouble with the DHW temperature sensor. The control automatics of gas boiler Olikal gives out error E6 if there is a breakage of temperature sensor of DHW or the temperature necessary for stable work is strongly increased. If the hot water temperature sensor appears to be out of order, replace it. Contact breakage from electronic board to the domestic hot water temperature sensor. Check the contacts of the electric circuit and look for defects. If the connections between the control box and the temperature sensor are normal, the sensor itself is without defects, but the malfunction is still reported, then it can be asserted that the control box is faulty.

Gas burner malfunction during ignition phase. Fault E5 informs that the ignition is not performed due to the attenuation of the flame of the burner. Check electrical connections from ignition unit to flame electrode or from gas valve to control board. Reconnect the electrodes if faults are detected. At the same time, the lack of draught may be the reason for malfunctions that result in the flame bursting. Inspect the flue duct for debris.

Alphatherm boilers errors

No ignition occurs. No fuel supply to the gas burner Alphatherm boiler. The stop valve seems to be blocked. The tap on the gas supply line must be opened. Air must be purged from the piping line during the initial start-up. Check the gas pressure level supplied to the gas fitting. Required pressure 18 to 20 MBar. Then check if the minimum and maximum settings of the gas mixture pressure at the nozzles are correct. Installation specifications are in the user manual. If necessary, adjust the boiler. Breakage of the gas valve. If irregularities are detected, replace the gas valve. Ignition electrode is not working satisfactorily or is faulty. Check if it is clogged. Adjust interval between gas burner and ionization electrode if necessary. Functional fault in the gas supply unit. Inspect the coils of the gas valve to check for possible short circuits or interruptions. In case of any damage, change the gas valve. Gas valve starts to stick. Attach a rubber tube to the connection on the front of the valve and form an increased pressure. Insufficient power for ignition. Adjust the ignition power using the service menu. Control board malfunction or breakage. Ignition transformer stops working. Reset the boiler. If the error resumes, the control board must be replaced. Perform grounding test. There must not be any charge on the body. Excessive moisture content blocks the appliance. Clean the combustion chamber, flame control electrode and burner unit. Malfunction of the electrode that controls the flame. Electronics board detects flame, but there is no flame. Check the wiring of the flame control electrode. There can be bad contacts and breaks. Check the continuity of the circuit from the ionisation electrode to the control board for short circuits. Ionization electrode is adjacent to the gas burner unit. Control board is broken. It must be changed. There is a problem with the ignition. This circumstance occurs when the ignition mechanism does not work or the burner flame failure is observed. It is recommended to check the contacts between the ignition mechanism, and the flame electrode, and also between the control board and the gas valve. The main reason for the flame stoppage may be a lack of draught.

Alphatherm boiler overheating detected. Temperature of the emergency thermostat exceeds 105°C. If there is no ignition message at this time, the error is not detected. The gas burner goes out because the temperature of the main circuit has risen, although the heat exchanger does not stop heating. For heating mode 90 C, for hot water supply phase 95 C. The control system will stop the boiler operation if the emergency thermostat temperature reaches more than 105 C for 10 seconds. If the overheating thermostat detects a temperature of more than 105 degrees in heating or defrosting mode, the boiler automatics measures out a stop for about 30 seconds. If the temperature of the safety thermostat and the NTC heating sensor does not drop to a hundred degrees during this time, the control system will indicate an error. The blocking of the device is carried out when the signal to ignite the gas burner is given. If the emergency thermostat temperature is greater than 105 degrees during the ignition cycle, the boiler will go into standby mode for ten seconds and only then signal an error. Heating system thermostat or safety thermostat shutting off the unit is triggered. Emergency thermostat will turn on when temperature rises above 105 deg. Wait for the Alfatherm boiler to cool down and restart it using the reset button. The safety thermostat malfunctioned or not functioning properly. Replace it. Unsatisfactory water circulation in the heating circuit. Perform pressure measurements for the heating system. When the system has cooled down, the pressure must be 1.2 bar. There is air in the heating system. Bleed the system through the air vent. No circulation. Open to failure the shut-off and control elements that slow down the necessary liquid circulation. Circulation pump malfunctions. Pump does not rotate at normal speed. Diagnose indicators and power supply voltage. If the power supply voltage fluctuates, connect the boiler to the network using a stabilizer. Check circulation pump stator winding resistance for damage or short circuit. The circulation pump works correctly, although the flow is not sufficient. Impeller probably has a defect. If damage is detected, it is recommended to change the pump. Pump does not rotate, but has sufficient inflow. Check the pump; it is evident that it is jammed. Unscrew the stopper and turn the motor rotor shaft. No power to circulating pump. The electronic board is defective. It is recommended to restart the boiler. If the failure resumes, replace the control board. The flue gas thermostat has overheated. Allow the thermostat to cool then reset.

error, alfa, calor, boiler

NTC sensor of the heating system is defective. The electric circuit is interrupted or the temperature sensor in the heating circuit is short-circuited. If the sensor line is open, the signal is lost and the control board signals the gas burner shutdown.

The temperature sensor of hot water supply is out of order. If there is an interruption or short circuit of the temperature sensor for hot water supply for 5 seconds, the gas burner will not work for hot water supply. Alphatherm boiler will continue to operate in heating mode. Broken sensor for temperature of hot water supply.

Indicates that the system pressure reading is low. Possible reasons for this malfunction: low fluid pressure in the heating circuit. The contact between the electronic board and the relay-sensor is broken. Pressostat defective. The first thing you should do is check the pressure gauge readings. In many cases the failure can be eliminated by means of a make-up valve, which is designed to add coolant to the system. If the breakdown resumes, there may be a leak of heat carrier. Leaky can be a circulating pump, primary heat exchanger, safety valve, worn elements of the seal, make-up valve and other parts. Leak detected visually by inspection of hydro units and components.

Unsatisfactory draft. For a stable and safe operation of the Alphatherm boiler, the flue gas must be draught free in order to prevent it from penetrating into the living space. The exhaust is monitored electronically, and if there is a problem, the draught sensor will trip and the unit will stop operating. The following are the main reasons for a draught failure: limited diameter of the flue duct, incorrect installation, dirt, ice on the inner wall. Diminished size of the chimney flue can cause lack of draught. The chimney pipe is too long Carefully read the installation manual of the appliance and comply with the relevant requirements. Excessively long horizontal section of smoke exhaust pipe may cause loss of necessary draught. Malfunction pneumo relay draught sensor. When there is a vacuum in the supply pipe, a faint click can be heard. Contact of control board with pneumatic relay. traction sensor is broken, condensate is present, as well as incorrect connection of tubes to pneumatic relay. Fan stops operating. There is a blockage in the fan impeller. The fan shaft is not lubricated and consequently does not reach the required rpm. No contact between fan and electronic board.

Alfa Color Boiler Faults

Alfa Color gas boiler does not ignite. No gas supply to the combustion unit. The shut-off valve on the inlet line is closed. Need to open the shutoff valve. Bleed the pipe system when starting the appliance for the first time. Check pressure of gas supplied to the gas fitting. Necessary parameters of pressure are given in the instruction manual. Also adjust the gas pressure at the nozzle (minimum / maximum). Gas valve not working. Replace the gas valve if malfunction is detected. Malfunction of or damage to the ionization electrode. Check and correct the distance between the ionisation electrode and the burner assembly. If there is a lot of soot on the electrode, clean it. Malfunction of components in the gas train, including shorted or broken contacts in the gas valve coils. If these irregularities are found, replace the gas valve. Stuck gas valve stem. There is a connector on the front of the valve. Fix a rubber tube on it and remove excessive pressure. Ignition power is limited. Access the service menu of the machine and adjust the required output. Control board is broken or malfunction has occurred. If the ignition transformer does not work, it is advisable to reset the appliance. If error E01 reoccurs, replace or repair the control board. After all that, you need to check the grounding. Charge on the lining must not be allowed. Blockage of the appliance in some cases due to high humidity. Ionisation electrode, burner and combustion chamber must be cleaned carefully. The flame control electrode has failed. No flame on the burner, although recognized by the electronics module. There is a fault in the connections or a short in the wiring from the electronic board to the electrode. Test the electrical connections and fix the problems.

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Unsatisfactory pressure in the system. Alfa Calor boiler signals error H20 if there is too little liquid in the heating system. Broken connections from the electronic board to the pressure sensor. Sensor of the minimum pressure is damaged. First of all, check what the pressure gauge reads. In case of low pressure, fill heating circuit with coolant. Water make-up valve on the unit for filling up the heating medium. If error H20 resumes, the entire system should be inspected to determine if there is a potential leak. Leaks can occur in the circulation pump, safety group valve, at the primary heat exchanger, and damaged gaskets and seals.

The overheating of the gas boiler Alfa Color. The safety thermostat has reached 103C. Fault E02 will not be reported if there is no ignition request at this time. When the temperature in the heating circuit rises, the burner fades, but the heat exchanger continues to heat. If the temperature of the emergency overheating sensor exceeds 103 C, after 15 seconds the boiler will stop operating due to the activation of the automatic system. If the thermostat detects a temperature higher than 100 C in the heating cycle, the electronics will wait for a possible temperature drop for approx. 25 seconds. If the NTC heating sensors and the thermostat do not decrease the temperature during this time, the gas boiler displays error code E02. Shutdown during the ignition phase of the burner. If the temperature of the overheat protection thermo switch exceeds 103 C in the flame forming phase, the automatic system signals an error with an interval of 10 seconds. Activation of an overheating safety thermostat or a heating water thermostat blocking the device. When liquid temperature rises to 103 C, overtemperature sensor trips. After the appliance has cooled down, restart it using the reset button. The over-temperature sensor is malfunctioning or damaged. It must be changed. Circulation of the heating water is restricted in the heating system. If during the pressure test of the cooled down heating system it becomes clear that the pressure has decreased, fill the appliance with water. Excessive air in the heating pipe. It is recommended to use an automatic diverter to remove air from the pipes. No circulation process. Open shutoff valves on water pipes completely for normal circulation of coolant. Circulation pump does not work correctly. Pump does not rotate smoothly. Stable mains voltage is not available. In the event of repeated power cuts, it is advisable to connect the unit to the mains using a stabiliser. The water circulating pump motor is broken or the stator winding is short-circuited. Water pressure is low even though the circulation pump is operating normally. Blades may be damaged, consequently, the hydraulic pump must be replaced. The heating medium is flowing continuously to the circulation pump, although the pump is not rotating. Pump should be inspected for possible rotor shaft defect. Remove plug, then rotate rotor motor shaft by hand. There is no communication between the automation module and the pump, indicating a control module malfunction. If after resetting the appliance the problem still exists, replace the control module. The temperature sensor of the combustion products has overheated. Reset the appliance when the thermostat relay cools down.

Poor draft. The Alfa Calor gas boiler works reliably and stably when there is a good draught in the smoke exhaust duct. The automatics system monitors that combustion products do not penetrate into the room and if a malfunction is detected, the draught sensor interrupts the operation of the device with error code E03. Here are some reasons why the draft is off or becomes too weak. Smoke exhaust duct is too narrow or miscalculated during installation. Blockages or ice on the inside walls. Permissible chimney lengths have been exceeded. Read the relevant standards and regulations in the user manual. The pneumatic draught switch is damaged. Need to test it and change it if necessary. Connections from automation module to draught diverter are broken. Check electrical connections and remedy. Condensation is present and, in addition, tubing is not properly attached to the pneumovalve. Remove condensation and reattach the tubes to the pressostat normally. Fan defect. Fan impeller is clogged. Decrease in fan speed due to insufficient lubrication of the drive shaft. Connections from fan to control board are broken.

Temperature sensor in the heating line is out of order. Alfa Color boiler indicates error code E05 during an increase in the set temperature or if the temperature sensor of the heating system is defective. Heating sensor circuit is damaged. If communication between the control module and the temperature sensor is interrupted, this malfunction appears. The correct operation of the device will be restored within ten seconds after the failure, if the malfunction was unexplained. If the check discovers no condensation on the controller module or temperature sensor connector, replace the sensor. Temperature sensor electrical circuit contacts are closed or the water is not at an excessively high temperature. Check for temperature to start. If the resistance differs from the required standards, the sensor should be changed. If a working sensor is connected but the E05 error occurs again, repair or replace the control board.

Damaged hot water temperature sensor. Alfa Kalor boiler automatics will report error E06 when the temperature sensor of hot water has malfunctioned or the temperature required for trouble-free operation has increased noticeably. If the sensor is unreliable, it must be replaced. Damaged contacts from control board to hot water temperature sensor. Inspect the electrical connections and locate the malfunction. If the electrical connections between the temperature sensor and the automatics module are intact and the temperature sensor itself is intact, but error E06 is still displayed, it is possible to speak about the breakdown of the electronics board.

Alphatherm Boiler Faults and Codes

All possible problems and solutions, as well as error codes for boilers Alphatherm SIGMA are collected in this article. All information is read in the following order: code name, possible malfunction. If you have any additional questions, please leave them in the Комментарии и мнения владельцев to this article.

If you are not 100% sure what the problem is and you can’t solve it immediately contact the service center for diagnosis and troubleshooting.

Below we look at errors and malfunctions that are possible during the operation of the wall mounted gas boiler Alphatherm SIGMA.

Fault code E1 Faulty ignition

Troubleshooting: Check that the gas valve is open, press ‘RESET’ to restart the gas boiler and restart. If the boiler repeats the error, shut it down and call the service technician.

Error code E2 Overheating of the heating medium

Troubleshooting: Press RESET to restart the gas boiler when the water temperature is below 60°C. If the boiler does not restart, or if the problem occurs again, call a service technician.

Error code E3 Smoke extraction system malfunction

Troubleshooting: Turn off the gas boiler. Check whether the ventilation or the chimney is blocked. Remove blocking objects and restart the boiler. If the boiler does not restart or the problem occurs again, call a service technician.

Error code E4 Low water pressure

Ways to fix the problem: Turn off the gas boiler and the power supply, using the make-up tap add water so that the pressure reaches 0.1

0.16 MPa. Close makeup tap and restart the boiler.

Error code E6 Faulty domestic hot water temperature sensor

Ways to eliminate the fault: Call a service technician to repair or replace the temperature sensor.

Error code E7 Heating system temperature sensor error

Ways out of the problem: Call a service technician to repair or replace the temperature sensor.

Error code E8 Overtemperature of hot service water (≥90°C during 60°C)

Ways to fix the problem: Press ‘RESET’ to restart.

Error code E9 Frost protection blockage

Ways to eliminate the fault: The gas boiler will automatically reactivate when the hot water temperature exceeds 1°C.

Alfa calor boiler problems, error E14, ignition of boiler

Thank you for the information. There is the same problem with the boiler. I bought a relay, I will change it.

Anatoli Pyshynski

Sos!! The board is similar but different (Honeywell). How did you determine that it was the relay? I also have a TAKAMISAWA VE24H5 24VDC and two FT.

SERGIO 0600

Thank you so much for the video. I had the same error E14. removed the board.went to the market. bought relay. Then in the TV repair shop re-soldered. put the board back in place. wired the chips. BUT. It worked for about 15 minutes.then the error E14 again. I think to resolder the other two relays. as a result will write here.

Gena Rabatuev

In the 2 years since the video was published I had to change this element on the board again? Re-soldered 2 years ago. This winter again e14.

Sergey Tishkovsky

tell me what the optimum pressure can be set on the manometer that is under the boiler

Sergey Tishkovsky

Thanks, but I do not understand why professionals take away the old board.maybe they also change relays and take advantage of ordinary people

he is a man

Relay to change the lowest or 2 from the bottom is bad

Vovk Turbin

Good afternoon! Help Aogw-24-op cracks but does not ignite! And the error “boiler lock for lack of flame” advise please also relay or something else may be it?

Denis Karpenko

Pasha, same problem! Thanks a lot for the video It worked. Works.

Vanya Zaremba

I changed it every year too! Then I soldered a 10 amp relay instead of a 5 amp one! 1.5? Years everything is fine! It just did not fit, but it does not matter!

Pasha Gordienko

I get it on the third try, maybe it is a relay

geoskis10 Kiselev

E14 is not the ignition error. And on the air thermostat (pneumo relay) T.Did you change the fan relay.

Alexander Gribov

Hello, do you have a diode bridge PEC5359 DI108S in your store?I need it now!

Alex COSMOS

GOOD EVENING PAVEL!TODAY, TOO FACED WITH A SIMILAR PROBLEM, ALSO ALPHA-32, BUT MY BOARD IS SOMEHOW DIFFERENT.

Котел BAXI, ошибка Е03. Поиск и устранение неисправности E03

evgenij pankratov

Helpful information.Thank you for your initiative.If it is not difficult to publish the link to the required relays.You can also get them from Ali express.Like and subscribe from me.

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