Bosch 6000 c7 boiler error codes. Heating systems for country and country houses. Boilers, geysers, water heaters - Repair, service, operation. Recommendations for installation and assembly. Error code CE - Low pressure to fill the heating system
Problem: “The EA error appears on the new BOSCH WBN 6000-24c boiler - no flame detected. The more degrees are set, the less frequent the error. But at low temperatures it gives an error almost every day. Before an error occurs, the flame icon disappears. What to do?"
- Check whether the protective conductor is connected;
- Make sure it is open gas tap;
- Check gas pressure, correct if necessary;
- Make sure that the electrical connection is working properly;
- Check the electrodes with wires, replace if necessary;
- Check output system flue gases, clean or repair if necessary;
- Check the gas adjustment and correct if necessary;
- For natural gas: Check the gas flow control relay. Replace if necessary;
- When working with combustion air intake from the room, check the air supply to the room and the ventilation openings;
- Clean the heat exchanger;
- Check the gas fittings and replace if necessary.
In 90% of cases, the problem is in the board. The best thing to do is contact the service center immediately. They will be able to provide quality assistance: diagnose and repair the boiler.
I hope the article " Gas boiler WBN BOSCH 6000-24c error EA"was useful to you.
Any equipment can break down. The main thing is to quickly and effectively fix the breakdown. To make the task easier, the Bosch gas boiler displays errors on the display. These symbols indicate the cause of the problem. All you have to do is find the decryption and start looking for the problem. We will describe ways to eliminate it below.
Features of the Bosch gas boiler
The dual-circuit device is the most popular among users. It simultaneously works for hot water supply (DHW) and heating. Some models are equipped with two heat exchangers, which ensure uninterrupted operation of the system.
The control panel contains power regulators. Therefore, heating can be adjusted to the area of the room. How does equipment switch from one circuit to another? For this purpose it is provided three-way valve. The boiler's operation is focused on the main circuit - the heating circuit. When the mixer is opened, the valve switches the flow to the DHW system.
The circulation of the coolant is ensured by a pump. Sensors monitor the device and, in case of deviations in operation, send a signal to the control module. As a result, error codes appear.
Errors and malfunctions
The table contains error codes that correspond to Bosch models WBN 6000-24C, Bosch ZSC 24-3 (35-3) MFA, ZWC 24-3 (28-3, 35-3) MFA, Bosch ZWE 24-4 (28-4), ZSE 24-4 MFA, Bosch ZWE 24-5 MFK, Bosch ZWE 24-4 (ZSE) MF.
| Error code | What does it mean | How to fix it yourself |
| A2 | The combustion chamber smokes. The heat exchanger is clogged with soot and scale. | Clean the radiator. Remove soot with a brush. Scale is removed with reagents or a solution of citric acid. |
| A3 | There is no signal from the flue gas sensor. | Inspect the sensor wiring, tighten the contacts. Replace the faulty part. |
| A4 | Carbon monoxide is released to the flow fuse. | Clean the pipes and chimney from blockages with soot, debris, and foreign objects. Make sure there is traction. |
| A6 | There is no contact with the burner temperature sensor. | Carry out diagnostics of the connections and the sensor itself. |
| A7 | The water thermistor has failed. | |
| A8 | There is no contact with the BUS bus. | Tighten the connections from the bus to the control module. Replace cable |
| A9 | Incorrect connection of the DHW temperature sensor. | Check for incorrect connection. Install the element correctly using heat-conducting paste. |
| AC | The module is not recognized. | Inspect the wiring between the module and the display, information panel. As well as connections, outdoor thermometer. |
| Ad | There is no connection to the water heater thermistor. | Perform diagnostics of all contacts and sensor. |
| b1 | The system does not find the coding plug. |
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| C1 |
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| C4 | The pressure switch does not work and does not open. | Perform diagnostics and replace the element. When coding C6, additionally check the rotation of the fan. |
| C6 | The relay does not close. | |
| C7 | The fan is faulty. | Reconnect the plug, repair the fan. |
| SE | The pressure in the heating system has dropped. | Open the water supply tap. Add water until the readings are normal. |
| CC/d5 | The system “does not see” the external temperature sensor. | Connect the cable more tightly and make sure that the part is in good condition. |
| d3 | Jumper 161 on ST8 is not fixed. | If the jumper is in place, connect the plug correctly. Contact service center. |
| d4 | Temperature difference exceeded. | Carry out an inspection:
Measure your blood pressure. |
| d7 | The adjustment valve has failed. | Carry out diagnostics of the valve and its wiring. If there is a malfunction, install a new part. |
| E0 | There is a problem with the printed circuit board. | Reconnect the contacts or install a working board. |
| E2 | The supply line thermistor has failed. | Check the element for open circuit or short circuit. Check the connectors for oxidation, clean and replace parts. |
| E9 (11) | Signal from the heat exchanger temperature sensor. | What to do? Check:
Clean the radiator from scale and dirt. |
| EA | The flame in the burner went out. | How to fix the problem:
|
| er | Signal about failure of one of the nodes. | Perform a full boiler diagnostic. |
| F0 | Internal problem. | Inspect and reconnect the terminals and wires to the control module. Make sure they are intact. If everything is ok, change the module. |
| F7 | The equipment is not functioning, but the flame is detected. | Check if the chimney is working properly. Confirm the presence of traction. Perform diagnostics of sensors, electrodes, cables. |
| F.A. | The fuel supply is shut off, but there is a signal indicating the presence of a flame. | Inspect the ionization electrode and the serviceability of the shut-off valves. |
| Fd | Accidental key press on the panel. | Press the same button and hold for 30 seconds. |
| | | | The fan is not adjusted. | Perform the adjustment. |
| P | The boiler type is not determined. | Set the type. |
| 23 | The fuel type is indicated. |
Other faults
There are problems with “ ” boilers that are not displayed as an error.
The burner does not work
It is necessary to check the condition and turn on the emergency and starting switches. If one of the safety circuit breakers is faulty, repair it or replace it with a working device.
Also carry out diagnostics of temperature controllers and outlet product relays. Perform preventative cleaning of the firebox, burner, nozzles, and exhaust pipes.
No spark, no ignition
Look for the problem in:
- Ignition electrode. Clean it and place it closer to the burner.
- Burner.
- Ignition transformer.
Noise and hum when the boiler is turned on
Clean the parts, including the heat exchanger, from scale. Salt deposits interfere with heat transfer, so the water boils and hisses. If the plaque is not removed, the unit will overheat and fail.
Hot water does not turn on
If when opening the mixer there is no hot water, inspect the three-way valve. If it breaks, it needs to be replaced. Also make sure that the mixer is in working order, clean the pipes and filters from blockages.
Whistle when igniting the burner
The size of the nozzles does not correspond to the pressure in the gas line. Change them.
Black smoke and soot
The ignition unit needs to be cleaned. Parts and holes are clogged with dust and dirt.
Popping noise when igniting
What could have happened:
- The gas supply is set incorrectly.
- Incorrect injector size.
- The chimney is clogged.
- Incorrect chimney shaft structure.
- Ventilation in the room is poor.
We hope that after reading the article, you will determine the cause of the breakdown. You can carry out repairs yourself if you are technically savvy. However, remember: before starting work, be sure to turn off the gas and water supplies.
Automation and malfunctions of Bosch Gaz 6000 W boilers
Automatic control for gas boilers Bosch Gaz 6000 W
The control panel of Bosch 6000 W gas convection boilers with the Cotronic 3 data bus allows you to control the heating system depending on room temperature.
For these wall-mounted convection gas boilers, two types of Bosch regulators are recommended.
Programmable room temperature controller OpenThermTM CR12005
Rice. 7. Combination of a programmable room temperature controller OpenThermTM CR12005 with the control panel of a Bosch 6000 gas convection boiler
Purpose and functions:
OpenThermTM programmable thermostat for boiler control with Cotronic 3 data bus.
Data exchange with the controller via a two-wire bus.
Two-wire bus technology, reverse polarity protection.
Simple, intuitive settings for temperature regulation and hot water control.
Preset weekly programs with six switching points.
Possibility of manually changing the program for each day of the week.
LCD display with digital and graphic display of work status. Display of the current heating and hot water temperature, outside temperature
(only if there is a temperature sensor), indication of the boiler burner operation status and error codes.
Possibility of remotely resetting the boiler error.
Using the OpenThermTM protocol.
The air temperature setting range in the control room is 7...39 ° C with an adjustment step of 0.5 ° C.
Room temperature controller TRZ 12-2
Fig.8. Combination of room temperature regulator TRZ 12-2 (on/off) with control panel of a gas convection boiler Bosch Gaz 6000 W
Description and functions of the controller
The room temperature regulator TRZ 12-2 is recommended for two-position regulation of the burner flame and control of the circulation pump of gas wall-mounted boilers.
Weekly programming of time intervals.
Three operating modes: “Normal”, “Economical”, “Automatic”.
Vacation function (up to 99 days).
Anti-freeze function.
Display of date and current time, automatic change of summer/winter time (synchronization with the system).
The room temperature adjustment range is from +5 to +39 °C.
Faults shown on the display of Bosch 6000 boilers
A7 - Hot water temperature sensor is faulty. Check for damage or short circuit
temperature sensor and its wires, replace if necessary. Ad - Not recognized temperature sensor
boiler
Check the boiler temperature sensor and connecting wire
C1 - Low fan speed.
Check the mains voltage.
C4 - The differential pressure switch does not open when the fan is turned off.
Check the differential pressure switch.
C6 - The differential pressure switch does not close.
Check the differential pressure switch and flue gas pipes.
C7 - The fan does not work.
Check the fan and its wire with plug, replace if necessary.
CE - Insufficient filling pressure of the heating system.
Add water.
d7 - The gas fittings of the Bosch Gaz 6000 W wall-mounted boiler are faulty.
Check the connecting wire.
Check for damage or short circuit to the temperature sensor and its wire, replace if necessary.
E9 - The heat exchanger temperature limiter has tripped.
Check for damage to the heat exchanger temperature limiter and its connecting wire, replace if necessary.
Check operating pressure in the heating system.
Check the temperature limiter, replace if necessary.
Check the pump starting, replace the pump if necessary.
Check the fuse, replace if necessary.
Remove air from the Bosch 6000 W boiler.
Check the water circuit of the heat exchanger, replace if necessary.
Check for damage to the flue gas temperature limiter and its connecting wire, replace if necessary.
EA - No flame detected.
Check the protective conductor connection.
Check if the gas valve is open.
Check the gas supply pressure and correct if necessary.
Check the electrical connection.
Check the electrodes with wires, replace if necessary.
Check the flue gas system and clean or repair if necessary.
Check gas adjustment and correct if necessary.
For natural gas: check the gas flow control relay, replace if necessary.
When working with combustion air taken from the room, check the air supply to the room and the ventilation openings.
Clean the heat exchanger.
Check the gas fittings, replace if necessary.
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OPERATION AND REPAIR OF BOILERSProtherm Panther Protherm Stingray Protherm Bear Protherm Cheetah Evan
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This article contains all possible malfunctions and options for eliminating them, as well as error codes for Bosch 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.
If you are not 100% sure what exactly the problem is and that you can solve it, immediately contact the service center to diagnose and fix the problem.
Find out the price and buy heating equipment and related products you can find here. Write, call and come to one of the stores in your city. Delivery throughout the Russian Federation and CIS countries.
Bosch Gaz 6000 boiler errors
The list below shows faults specifically for Bosch Gaz 6000 series boilers. Determine the error code and fix the problems in a timely manner.
Error code A7 - Hot water temperature sensor has a malfunction
Error code Ad - Boiler temperature sensor not detected
Check the boiler sensor and connection wires.
Error code C1 - Fan rotates at low speed
- Check the voltage in the network.
- Check flue gas outlet. Clean or repair if necessary.
Error code C4 - The differential pressure switch does not open when the fan is not working
Check the differential. pressure switch.
Error code C6 - The differential pressure switch does not close
- Check differential pressure switch, as well as flue gas exhaust pipes.
Error code C7 - Fan does not function
Check the fan, wire and plug. Replace if necessary.
Error code CE - Low pressure to fill the heating system
Add water.
Error code d7 - There is a malfunction in the gas fittings of the Bosch 6000 wall-mounted boiler
- Check the connection wire.
Error code E2 - Faulty or broken temperature sensor on the supply line
Check the sensor for defects, as well as a possible short circuit in its wire. Replace if necessary.
Error code E9 - Heat exchanger temperature limiter tripped
- Check the heat exchanger temperature limiter for a defect, as well as a possible short circuit in its wire. Replace if necessary.
- Check the operating pressure in the heating system.
- Check the temperature limiter and replace it if necessary.
- Check pump starting. If necessary, replace the pump.
- Check the fuse, replace if necessary.
- Remove air from gas boiler Bosch 6000.
- Check the water circuit of the heat exchanger; if damaged, replace it.
- Check the flue gas temperature limiter for defects, as well as a possible short circuit in its wire. Replace if necessary.
EA Error Code - Flame Not Found
- Check the connection of the protection wire.
- Check the opening of the gas valve.
- Check gas supply pressure. If necessary, correct the problem.
- Check the connection to the electrical network.
- Check the electrodes and wires. If necessary, correct the problem.
- Check the flue gas outlet. Clean or repair if necessary.
- Adjust the gas. If necessary, correct the problem.
- For natural gas: check the gas flow control relay. If necessary, correct the problem.
- When using a combustion air intake from a room, check the air draft into the room and the ventilation openings.
- Clean the heat exchanger.
- Inspect gas fittings. Replace if necessary.
Error code F7 - Flame detection when the boiler is off
Although the boiler is turned off, a flame is detected.
- Check the electrodes for contamination and replace if necessary.
- Check the humidity of the electronic board, dry if necessary.
Error code FA - Flame detection after gas supply shutdown
After turning off the gas supply, a flame was detected.
- Check the gas fittings, replace if necessary.
- Check the electrodes and connecting wires and replace if necessary.
- Check the flue gas system and clean or repair if necessary.
Error code P - Boiler type not defined
Set the boiler type.
Error code Fd - The button was mistakenly pressed for too long (more than 30 seconds)
Error codes for gas boilers Bosch ZSC / ZWC 24 MFA
Below is a list of faults specifically for Bosch boilers of the ZSC / ZWC 24 MFA series. Identify the error code and troubleshoot in a timely manner.
Error code A7 - Hot water temperature sensor is faulty
Check for damage or short circuit of the temperature sensor and its wire, replace if necessary.
Error code A8 - BUS connection interrupted
Check connecting cable and regulators.
Error code A9 - Hot water temperature sensor is not installed correctly
Check the installation area, if necessary, remove the sensor and reinstall it using heat-conducting paste.
Error code Ad - Boiler sensor not detected
Check the boiler sensor and connecting cable.
Error code b1 - Coding plug not detected
Insert the coding plug correctly, measure it and replace it if necessary.
Error code C1 - The differential pressure switch opened during operation of the device
Check the differential pressure switch, exhaust device and connecting pipes.
Error code C4 - Differential pressure switch does not open in rest position
C4 - The differential pressure switch does not open when the fan is turned off.
Error code C6 - Differential pressure switch does not close
C6 - The differential pressure switch does not close.
Error code d3 - Jumper not detected on ST8 161
If there is a jumper, insert the plug correctly and check the external limiter. Otherwise: is there a jumper?
Error code d4 - Temperature difference too large
Check the pump, bypass hose and system pressure.
Error code E2 - Flow temperature sensor does not work
Check temperature sensor and connecting cable.
Error code E9 - Flow limiter has tripped
Check the pressure in the system, temperature sensors, check the operation of the pumps and the fuse on the electronic board, remove air from the device.
Error code EA - Bosch ZSC / ZWC boiler does not detect flame
Is the gas valve open? Check the pressure in gas network, network connection, trigger electrode with cable and ionization electrode with cable.
Error code F0 - Internal fault
Check the tight connections of the electrical plug contacts and start lines, and replace the electronic board if necessary.
Error code F7 - Although the boiler is turned off, a flame is detected
Check electrodes and cable. If the flue gas exhaust works, check the electronic board for moisture.
Error code FA - Flame detected after gas supply is turned off
Check the ionization electrode. Check gas fittings.
Error code Fd - The button was mistakenly pressed for too long (more than 30 seconds)
Press the button again for less than 30 seconds.
Error Code CC - Outside Temperature Sensor Not Detected
Check the outside temperature sensor and connecting cable for damage.
Bosch Gaz 6000 boiler errors
Error A7 - The hot water temperature sensor has a malfunction.
Error Ad - Boiler temperature sensor not detected.
Check the boiler sensor and connection wires.
Error C1 - The fan rotates at a low frequency.
Check the voltage in the network.
Check flue gas outlet. Clean or repair if necessary.
Error C4 - The differential pressure switch does not open when the fan is not working.
Check the differential. pressure switch.
Error C6 - The differential pressure switch does not close.
Check differential pressure switch, as well as flue gas exhaust pipes.
Error C7 - The fan is not functioning.
Check the fan, wire and plug. Replace if necessary.
Error CE - Low pressure to fill the heating system.
Add water.
Error d7 - There is a malfunction in the gas fittings of the Bosch 6000 wall-mounted boiler.
Check the connection wire.
Error E2 - Faulty or broken temperature sensor on the supply line.
Check the sensor for defects, as well as a possible short circuit in its wire. Replace if necessary.
Error E9 - The heat exchanger temperature limiter has tripped.
Check the heat exchanger temperature limiter for a defect, as well as a possible short circuit in its wire. Replace if necessary.
Check the operating pressure in the heating system.
Check the temperature limiter and replace it if necessary.
Check pump starting. If necessary, replace the pump.
Check the fuse, replace if necessary.
Remove air from the Bosch 6000 gas boiler.
Check the water circuit of the heat exchanger; if damaged, replace it.
Check the flue gas temperature limiter for defects, as well as a possible short circuit in its wire. Replace if necessary.
EA Error - No flame found.
Check the connection of the protection wire.
Check the opening of the gas valve.
Check gas supply pressure. If necessary, correct the problem.
Check the connection to the electrical network.
Check the electrodes and wires. If necessary, correct the problem.
Check the flue gas outlet. Clean or repair if necessary.
Adjust the gas. If necessary, correct the problem.
For natural gas: check the gas flow control relay. If necessary, correct the problem.
When using a combustion air intake from a room, check the air draft into the room and the ventilation openings.
Clean the heat exchanger.
Inspect gas fittings. Replace if necessary.
Error codes for gas boilers Bosch ZSC / ZWC 24 MFA
Faults shown on the display of Bosch 6000 boilers
Check for damage or short circuit of the temperature sensor and its wire, replace if necessary.
A8 - The connection to the BUS is interrupted.
Check connecting cable and regulators.
A9 - Hot water temperature sensor is not installed correctly.
Check the installation area, if necessary, remove the sensor and reinstall it using heat-conducting paste.
Ad - Boiler sensor not detected.
Check the boiler sensor and connecting cable.
b1 - Coding plug not detected.
Insert the coding plug correctly, measure it and replace it if necessary.
C1 - During operation of the device, the differential pressure switch opened.
Check the differential pressure switch, exhaust device and connecting pipes.
C4 - The differential pressure switch does not open in the non-working position.
C4 - The differential pressure switch does not open when the fan is turned off.
Check the differential pressure switch.
C6 - The differential pressure switch does not close.
d3 - Jumper 161 not detected on ST8
If there is a jumper, insert the plug correctly and check the external limiter. Otherwise: is there a jumper?
d4 - Temperature difference too large.
Check the pump, bypass hose and system pressure.
E2 - The flow temperature sensor does not work.
Check temperature sensor and connecting cable.
E9 - The limiter in the supply line has tripped.
Check the pressure in the system, temperature sensors, check the operation of the pumps and the fuse on the electronic board, remove air from the device.
EA - Bosch ZSC / ZWC boiler does not detect flame.
Is the gas valve open? Check the pressure in the gas network, the network connection, the starting electrode with cable and the ionization electrode with cable.
F0 - Internal fault.
Check the tight connections of the electrical plug contacts and start lines, and replace the electronic board if necessary.
F7 - Although the boiler is turned off, a flame is detected.
Check electrodes and cable. If the flue gas exhaust works, check the electronic board for moisture.
FA - Flame detected after gas supply was turned off.
Check the ionization electrode. Check gas fittings.
Fd - The button was mistakenly pressed for too long (more than 30 seconds).
Press the button again for less than 30 seconds.
CC - Outside temperature sensor not detected.
Check the outside temperature sensor and connecting cable for damage.
Malfunctions of Bosch gas boilers
The burner does not turn on
Check the operation of the emergency switch of the heating system - If necessary, turn it on.
Check the operation of the control system start switch - If necessary, turn it on.
Inspect the safety circuit breakers - Check their functionality, if necessary, replace the faulty circuit breaker.
Inspect the boiler water temperature regulator - Check and, if necessary, replace the faulty part.
The safety temperature limiter is faulty - Check and replace the part if necessary.
An error message appears from external safety devices (e.g. water quantity control safety device) - Check heating system, eliminate errors, replace the faulty device if necessary.
The flue gas monitoring relay is activated - AW 10: unlock the flue gas monitoring relay. AW 50: Wait a maximum of 15 minutes.
The Bosch boiler will turn on automatically if there is a request for heat. If it is triggered repeatedly, check the flue gas path and the functionality of the flue gas control relay. Replace the relay if it is faulty.
The burner lights up and turns off due to a malfunction. No pilot spark
There is a sound of ignition spark formation when the ignition cable is removed - If not: replace the ignition transformer.
If yes: Replace the ignition electrode or ignition burner.
The burner lights up and turns off due to a malfunction
Is the gas valve open? - Open the gas tap.
Natural gas supply pressure is higher than 8 mbar - If not: determine the cause and correct the fault.
Has air been removed from the gas pipeline? - Vent the air until the gas can be ignited.
The burner lights up and turns off due to a malfunction. No ionization current
The N and L connections may be reversed - Correct the error.
Check the voltage between L and PE - If there is no voltage: ground PE, install an isolation transformer if necessary.
Poor contact of the ionization wire - Eliminate the error, replace the defective part if necessary.
The ionization electrode is shorted to ground - The burner control is faulty.
Boiling sounds
Are there lime deposits or scale formation in the Bosch boiler?
Clean the boiler water circuit in accordance with the manufacturer's recommendations.
If there is constant water loss, determine and eliminate the cause.
If necessary, carry out water treatment and install a dirt trap.
Flat main flame
Are the injectors suitable for the supplied gas? - If not: install the correct injectors.
Matching holes supply and exhaust ventilation local rules and requirements for the installation of gas equipment?
If there is insufficient air flow, the deficiency must be corrected immediately.
Sharp whistle of the burner
Is it installed correct pressure on the injectors? - Check the set value, correct if necessary.
The burner is smoking
Is there any noticeable dirt in or below the cracks of the burner rods? - Carry out wet cleaning of the burner as described in these instructions.
Find the source of contamination and protect against further contamination.
Are the air supply and exhaust openings always operational? - Are there deposits or fibrous contamination on the surface of the heat exchanger?
Inspect through the cleaning holes and combustion chamber. Carry out dry and, if necessary, wet cleaning of the boiler as described in this manual.
Are the burner rods damaged or deformed, are there any deformation of individual slots? - Replace the burner rods, determine and eliminate the cause of the malfunction.
Information: Damage or deformation only occurs if at least one of the above faults occurs.
The burner ignites very loudly, with strong combustion noises, flames are visible on the nozzles
Are the correct injectors installed? - Switch off the burner, install a new burner rod and correct the incorrect gas type setting.
Are the injector pressures set to the correct pressure? - The smell of flue gases in the room where the boiler is installed.
Are flue gases coming out of the draft breaker? - Determine the cause of improper flue gas discharge and correct the problem.
If it is not possible to eliminate the cause immediately, then you need to turn off the burner.
Vacuum in chimney more than 3 Pa? Blockage in the flue gas path?
Are the chimney dimensions calculated correctly?
Do they work in the boiler room? exhaust fans that remove air from the room?
