Automation and malfunction of boilers Bosch GAZ 6000 W

Automation of control for gas boilers Bosch GAZ 6000 W

Bosch 6000 W gas convection boilers control panel with Cotronic 3 data transmission bus allows managing heating system depending on room temperature.

For these wall convection gas boilers, two types of Bosch regulators are recommended.

Programmable Room Temperature Controller OpenThermTM CR12005

Fig. 7. Combination of the programmable room temperature controller OpenThermTM CR12005 with the BOSH 6000 gas convection boiler control panel

Purpose and functions:

Programmable OpenThermTM thermostat to control boilers with COTRONIC 3 data transmission bus.

Data exchange with a double-wire tire.

Two-wire tire technology, reverse polarity protection.

Simple intuitive settings for controlling temperature and cooking hot water.

Preset weekly programs with six switch points. The ability to manually change the program for every day of the week.

LCD display with digital and graphic display of work status.

Displays the current temperature of heating and DHW, outdoor temperature (only if there is a temperature sensor), indication of the status of the boiler burner and error codes.

The ability to remotely reset the boiler error.

Using the OpenThermTM protocol.

The air temperature setting range in the control room 7 ... 39 ° C with a tuning step of 0.5 ° C.

TRZ 12-2 Room Temperature Controller

Fig.8. Combination of the Room Temperature Controller TRZ 12-2 (On / Off) with the Bosch Gaz 6000 W Gas Convection Boiler Control Panel

Description and function of the regulator

TRZ 12-2 Room Temperature Controller is recommended for a two-position control of the burner flame and gas-mounted circulation pump control.

Weekly programming time intervals.

Three modes of operation: "Normal", "economical", "automatic".

Function "Vacation" (up to 99 days).

Frozening prevention function.

Displays the date and current time, auto-matical shift of summer / winter time (synchronization with the system).

Range of adjustment of the room temperature from +5 to +39 ° C.

Faults shown on Bosch 6000 Boiler Display

A7 - Hot water temperature sensor is faulty.

Check the presence of damage or short circuit of the temperature sensor and its wires, replace if necessary.

AD is not identified by the temperature sensor of the boiler.

Check the temperature sensor of the boiler and connecting wire

C1 - Low fan rotation frequency.

Check the network voltage.

C4 - Differential pressure relay does not open when the fan is turned off.

Check the differential pressure relay.

C6 - Differential pressure relay does not closes.

Check Differential Pressure Relay and Turning Pipe flue gases.

C7 - Fan does not work.

Check the fan and its wire with a plug, replace if necessary.

CE - insufficient pressure of the filling of the heating system.

Plot water.

d7 - Faulty gas fittings of the wall boiler Bosch Gaz 6000 W.

Check the connecting wire.

E2 - faulty flow temperature sensor (cliff).

Check out the presence of damage or short circuit of the temperature sensor and its wires, replace if necessary.

E9 - worked the heat exchanger temperature limiter.

Check for damage to the heat exchanger temperature limiter and its connecting wire, replace if necessary.

Check the operating pressure in the heating system.

Check the temperature limiter, replace if necessary.

Check the pump start, replace the pump if necessary.

Check the fuse, replace if necessary.

Remove the air from the boiler Bosch 6000 W.

Check the water circuit of the heat exchanger, replace if necessary.

Check for damage to the temperature limiter of flue gases and its connecting wire, replace if necessary.

EA - the flame is not detected.

Check the Protective Wire Connect.

Check if the gas crane opened.

Check the gas pressure supplied, correct if necessary.

Check the connection to the power grid.

Check the electrodes with wires, replace if necessary.

Check the flue gas removal system, clean or repaired if necessary.

Check the gas adjustment, correct if necessary.

For natural Gas: Check the gas flow control relay, replace if necessary.

When working with a fence of air for burning out of the room, check the air supply to the room and the ventilation holes.

Clean the heat exchanger.

Check the gas reinforcement, replace if necessary.

__________________________________________________________________________

__________________________________________________________________________

__________________________________________________________________________

_______________________________________________________________________________

__________________________________________________________________________

_______________________________________________________________________________

2017-04-29 Evgeny Fomenko

Device and principle of work boilers Bosch

The most popular models among the Bosch boilers are two-circuit. There are two tasks in front of them: the first is the heating of the room to a given temperature, the second is to ensure hot water For household needs.

Bosch's devices, namely, Bosch Gas 4000 W and Junckers Bosch are equipped with two independent heat exchangers, which allows them to perfectly perform two tasks: heated water and ensuring heat in the room.

In each of the models, there is an opportunity to choose a suitable device power from 12 to 35 kW, when choosing a room is taken into account. As for the heating of the fluid for household needs, Performance is about 8-13 liters per minute.

Pluses of a wall double-circuit boiler:

Disadvantages:

• The first 20-40 seconds after you include a hot water faucet flows cold water.

Let us consider in more detail how the device works, on the example of the model Bosch gas 4000 W ZWA 24. When the boiler works in heating mode, using gas burner heat is transferred to the primary heat exchanger, which is a design from copper tubes and plates.

So that they do not spoil from exposure high temperatures and water, their surface is covered with a protective layer. The main task is to transfer heat formed during flame burning to the heating system. Water movement in the system provides a pump.

Also in the design there is a three-way valve, its task is to prevent water from entering the secondary heat exchanger. The secondary heat exchanger is necessary for water heating for household needs. The heating loop of the heating circuit comes out of the device through the feed heating line, and the cooled fluid flows through the reverse heating line.

When the boiler is installed on water heating for consumption, the 3-way valve closes the heating circuit. The heated liquid flows from the primary heat exchanger into the secondary, and then flows from the device.

Three-way valve Bosch boiler

Plus, when using different heat exchangers is obvious. When heating is often used simple waterand it usually contains impurities. When her heating occurs, impurities begin to form deposits, which negatively affect the heat exchanger, reduce its throughput, prevent the warming of water, reduce its service life.

And when the liquid that proceeds through the primary heat exchanger, it is in a closed chain, does not change its chemical propertiesMinimizes negative consequences.

The liquid that proceeds through the secondary heat exchanger, with time it raids, and after time the heat exchanger will need to be replaced or cleaning. If the malfunction falls on winterYour boiler will be able to work smoothly in heating mode using the primary radiator.

Basic error codes

Like any device, the Bosch gas boiler also sometimes fails and needs to be repaired, let's consider it in more detail possible malfunctions and ways to eliminate them.

11

Error 11 is possible in the BOSH bwc 42 device, deciphered, just as E9 error, signals the mechanization of the flue gas temperature limiter.

Flue gas temperature limiter

You must do the following:

• check for item damage to wire temperature limiter of flue gas, if discovered a break or melting, replace;
• check out pressure in the device;
• check temperature limiter;
• check out control of pump when it starts;
• if the air was accumulated in the boiler, lower it.

23

Error 23 is not an error, this code appears during tights and indicates the type of natural gas used

50

Error 50 appears on Bosch ZWA 24 models in the absence of flame.

Boiler Bosch ZWA 24

How to fix it:

70

Error 70 means a differential relay fault during ignition.

Causes and ways to eliminate it:

• differential relay fault, it is possible to determine by measuring its resistance, when inconsistent with the nominal, the relay will be replaced;
• mechanical violation of contacts and wires suitable for relays, check and connect the wires;
• bad work smoke, he can score, clean the chimney;
• incorrect setting or vehicle breakdown, Configure the fan if it is faulty, replace.

a2.

The error A2 appears when the exhaust flue gases are released on the combustion chamber, it says to clog the heat exchanger soot and Garoy. To eliminate, clean the heat exchanger.

Cleaning heat exchanger with compressed air

e2.

ERROR E2 - faulty temperature sensor for the feed line. Contact the sensor for short circuit or cliff, view the connecting wires to the chain violation or oxidation. Clean or connect the wires, in the event of a sensor fault, replace the new one.

e9

E9 error means managing the temperature limiter.

The reasons for the appearance and methods of elimination may be the following:

eA

ERA ERA flashes the absence of flame in the on state.

When this code appears, check:

eR.

Error ER (EP) appears in case of incorrect operation of the boiler when faults appear in any of the instrument blocks.

c3.

The C3 error appears on the Bosch ZWE boiler in case of exhaust gases on the combustion chamber. You can eliminate this problem by clearing the heat exchanger in accordance with the instructions in the instructions.

c4.

With a closed state of a differential pressure relay, an C4 error appears when the fan is turned off.

Differential relay

When this code appears, you can do the following:

• purify the tubes coming from the relay, after removing the relay, which is located in the top of the boiler. If the relay is clicked, the problem is eliminated;
• measure with a multimeter resistance On a break or short circuit, with inappropriate parameters, the relay needs to be changed.

c6.

The C6 error means that the differential relay does not turn on when the fan is turned on.

What to do when this code appears:

• check the serviceability of chimney, eliminate interference, in coaxial chimneys Sometimes it may be ice or frost.
• look, do not condensate on the tubesRelay. Dry tube with a hair dryer.
• check the relay for short circuit or break, replace the relay if necessary.

cE

CE error is quite a frequently repeated code in Bosch Gazh Gaz (Bosch Gaz) 6000 24 kW and means insufficient pressure in the heating circuit.

Boiler Bosch Gas 6000 24 kW

The lack of water in the circuit is determined by the pressure gauge:

• if a manometer located in the Red Zone, it is necessary to add water into the system using a tap of the feeding, which is located under the device;
• if the pressure gauge in the green zone, the pressure sensor should be changed. The sensor may be faulty microswitch or membrane.

f0.

Error F0 means an internal malfunction. When it appears it is necessary to check the reliability of connecting terminals and wires to the electronic board. If the wires are not oxidized, the connections are not broken, then this is a fault of the board itself, it should be replaced.

fD.

FD error appears if the button has been pressed for more than 30 seconds. To reset this code, press and hold the button less than this time.

sE

Error SE gives a signal of insufficient filling of the heating system.

Heat exchanger with scale and after cleaning

What should be done:

• follow water:
• the reason why pressure drops, it can be a flow or depressurization of heating pipes. If the pipes are hot, detect the fault is difficult, as water evaporation can occur in the placech place. To determine, the system should be cooled, bleed the joints in the location of the flow:
• a heat exchanger can be scored, remove it and rinse it, the procedure is described in the instructions for the boiler.

Other malfunctions

Above the most frequent error codes were given, let's consider other possible malfunctions.

Sometimes there are such problems:

Problem: "On the new boiler BOSCH WBN 6000-24C an EA error appears - the flame is not detected. The more degrees are exhibited, the less the error. But at low temperatures, it gives an error almost every day. Before the error occurs, the flame icon disappears. What to do?"

• Check whether the protective wire is connected;
• Make sure whether the gas crane opened;
• Check the gas pressure, correct if necessary;
• Make sure that the electrical connection is properly connected;
• Check electrodes with wires, replace if necessary;
• Check the output system of flue gases, clean or repaired if necessary;
• Check the gas adjustment, if necessary, fix;
• For natural gas: Check gas flow control relay. Replace if necessary;
• When working with the air fence for burning out of the room, you should check the air supply to the room and the ventilation holes;
• Clear heat exchanger;
• Check the gas fittings, replace if necessary.

In 90% of cases, the problem is in the board. The best just contact the service center. There will be able to provide high-quality assistance: make diagnostics and repair the boiler.

I hope the article " Gas boiler WBN BOSCH 6000-24C Error EA"It was useful to you.

Bosch Gaz 6000 boiler errors

A7 error - hot water temperature sensor has a malfunction.

The AD error is not defined the solar sensor of the boiler.

Check the boiler sensor and connection wires.

Error C1 - the fan rotates low frequency.

Check the voltage on the network.

Check the flue gases. If required, make cleaning or repair.

The C4 error - the discovery of the differential pressure relay does not occur when the fan is not working.

Verify DIF. pressure switch.

Error C6 - the differential pressure relay does not occur.

Check DIF. Pressure relay, as well as flue gases.

Error C7 - Fan does not function.

Check the fan, wire and plug. If required, replace.

CE error - small pressure to fill the heating system.

Water topping.

Error D7 - There is a malfunction of the gas fittings of the Bosch 6000 wall boiler.

Check the connection wire.

Error E2 is a malfunction or a break of the temperature sensor on the feed line.

Check the sensor for the presence of a defect, as well as a possible short circuit of its wire. If required, replace.

Error E9 - Writing the heat exchanger temperature limiter.

Check the heat exchanger temperature limiter for the presence of a defect, as well as a possible short circuit of its wire. If required, replace.

Check the operating pressure in the heating system.

Check the temperature limiter if necessary, replace it.

Check the pump start. If required, replace the pump.

Check the fuse, replace, if necessary.

Remove air from gas boiler Bosch 6000.

Check the water circuit of the heat exchanger, during damage to replace.

Check the flue gas temperature limiter for the presence of a defect, as well as a possible short circuit of its wire. If required, replace.

ERA EA - no flame found.

Check the connection of the protection wire.

Check the opening of the gas crane.

Check gas supply pressure. If required, eliminate the problem.

Check the connection to the electrical network.

Check the electrodes and wires. If required, troubleshoot.

Check the flue gases. If required, make cleaning or repair.

Gas setting up. If required, troubleshoot.

For natural gas: Check gas flow control relay. If required, eliminate the problem.

When using a combustion air intake from the room, check the air craving into the room and the ventilation holes.

Clean the heat exchanger.

Examise gas reinforcement. If required, replace.

Bosch Zsc / ZWC 24 MFA Error Codes

A7 - Hot water temperature sensor is faulty.

Check the presence of damage or short circuit of the temperature sensor and its wires, replace if necessary.

A8 - Connection with Bus-bus is interrupted.

Check the connecting cable and regulators.

A9 - Hot water temperature sensor is incorrectly installed.

Check the mounting zone, if necessary, dismantle the sensor and re-install it using a heat-conducting paste.

AD - The boiler sensor is not detected.

Check the boiler sensor and connecting cable.

b1 - the coding plug is not detected.

Properly insert the encoding plug, measure it and replace it if necessary.

C1 - During the operation of the device, the differential pressure relay occurred.

Check the differential pressure relay, exhaust device and connecting pipes.

C4 - Differential pressure relay in a non-working position does not open.

Check the differential pressure relay.

C6 - Differential pressure relay does not closes.
Check the differential pressure relay and flue gas removal pipes.

d3 - on the ST8 did not detect the jumper 161

If there are jumpers, insert the plug correctly, check the external limiter. In another case: Is there a jumper?

d4 - too much temperature difference.

Check the pump, bypass hose and pressure in the system.

E2 - The temperature sensor in the feed line does not work.

Check the temperature sensor and connecting cable.

E9 - worked the limiter in the feed line.

Check the pressure in the system, temperature sensors, check the operation of the pumps and the fuse on the electronic board, remove the air from the instrument.

EA - Boiler Bosch Zsc / ZWC does not fix the flame.

Gas crane is open? Check the pressure in the gas network, a network connection, a start-up electrode with a cable and an ionization electrode with a cable.

F0 - internal malfunction.

Check the strength of connecting electrical plug contacts and starting lines, if necessary, replace the electronic board.

F7 - Although the boiler is disabled, the flame is determined.

Check electrodes and cable. If the flue gas is running, check the electronic board to humidity.

Fa - After turning off the gas supply, a flame was detected.

Check the ionization electrode. Check gas fittings.

FD - the button was mistaken for too long (more than 30 seconds).

Click on the button again less than 30 seconds.

CC - The outdoor temperature sensor is not detected.

Check the outdoor temperature sensor and connecting cable for damage.

Faults of gas boilers BOSSH

The burner does not turn on

Check the operation of the emergency switch of the heating system - if necessary, then enable.

Check the operation of the control system start switch - if necessary, then enable.

Inspecting safety machines - check their performance, if required, replace the faulty automatic.

Inspect the boiler water temperature regulator - check if you need to replace the faulty item.

Faulty temperature limiter is defective - check if you need to replace the part.

An error signal appears from external security devices (for example, from the water control device for the amount of water) - check heating systemEliminate errors, if necessary, replace the faulty device.

The flue gas control relay is triggered - AW 10: Unlock flue gas control relays. AW 50: Wait a maximum of 15 minutes.

Bosch boiler will turn on automatically if the request is received for heat. With repeated triggering, check the path of flue gases and the efficiency of the flue gas control relay. Replace the relay if it is faulty.

The burner is lit and turns off for a malfunction. No sparkle

The sound of the formation of the ignition spark when the ignition cable is taken out - if not: replace the ignition transformer.

If yes: Replace the warehouse electrode or the ignition burner.

The burner is lit and turns off for a malfunction

Is the gas crane open? - Open the gas crane.

The supplied natural gas pressure is above 8 mbar - if not: set the cause and troubleshoot.

Is air from the gas pipeline removed? - Remove air until gas is possible.

The burner is lit and turns off for a malfunction. No ionization current

It is possible to confuse the connection N and L - eliminate the error.

Check the voltage between L and PE - if it is not: complete the PE ground, if necessary, install a separation transformer.

Bad ionization wire contact - eliminate the error, if necessary, replace the defective part.

The ionization electrode is closed for mass - the combustion machine is faulty.

Sounds of boiling

Are there any lime deposits or the formation of scale in the Bosch boiler?

Clean the water circuit of the heating boiler in accordance with the manufacturer's recommendations.

With constant water loss, install and eliminate the cause.

If required, make water treatment and install the dirt leader.

Flat main flame

Do the nozzles correspond to the supplied gas? - If not: Install the correct nozzles.

Matching holes support and exhaust ventilation Local rules and installation requirements of gas equipment?

In case of insufficient inflow, the lack of air should be immediately eliminated.

Sharp whistle burner

Lie has established proper pressure on nozzles? - Check the set value, correct if necessary.

Burner smotite

Are there any significant contamination in the cracks or below the rods of the burner rods? - Perform a wet cleaning of the burner as described in this manual.

Find the source of pollution and protect against further contamination.

Holes of the tributary and air hood constantly workable? - Are there deposits or fibrous pollution of the heat exchanger surface?

Spend inspection through the cleaning holes and the combustion chamber. Perform dry and, if required, wet cleaning of the boiler, as described in this manual.

Damaged or deformed rods burner, is there a deformation of individual slots? - Replace the rods of the burner, set and eliminate the cause of the fault.

Information: Damage or deformation occurs only with at least one of the above faults.

Razjig burner is very loud, with strong burning noises, the flame on the nozzles is visible.

Are the correct nozzles installed? - Turn off the burner, install a new burner rod and correct the incorrect type of gas type.

Is the proper pressure on the nozzles? - The smell of flue gases in the room where the boiler is installed.

The flue gases come out of the traction breaker? - Determine the reason for the wrong flue gases and eliminate the malfunction.

If the elimination of the cause is immediately impossible, then you need to turn off the burner.

Valuation in the chimney of more than 3 PA? Close on the path of flue gases?

Is the smoke pipe size calculated correctly?

Do the exhaust fans remove the air from the room work in the boiler room?