The symbols displayed on the display of the Wiesmann boiler do not always indicate a malfunction. Sometimes they occur during switching between modes. The manufacturer indicates the values of the codes in the instruction manual. If you do not have the opportunity to look into it, you can familiarize yourself with the decryption and troubleshooting methods in our publication.
Heating equipment “Visman” is not only productive, but also high-tech. Some models are controlled directly from your smartphone, so you can adjust the settings even when you are away from home.
The Vitodens series is available in single and double circuit models. They are equipped with displays and adjustment knobs, there is a remote control.
The Inox-Radial steel radiator located on top is designed for service more than 10 years. The equipment is equipped with a modern burner with Lambda Pro Control flame modulation – the user can save fuel by lowering the fire level.
An expansion tank is provided to control the pressure during heating. Double-circuit products have an additional plate heat exchanger. It heats water for household needs.
There are condensing boilers that generate energy even from accumulated condensate.
The Viessmann brand produces low-temperature equipment. Models Vitopend 100, Vitogas, Vitorond have automatic adjustment depending on the outside temperature. Appliances come in closed and open types, so some require a chimney.
High-quality insulation of the body allows you to save thermal energy.
The electronic system of the equipment independently determines the breakdown and displays the fault code on the display. By noticing the characters, you can read the transcript. If you’re tech savvy, try DIY repairs.
- Measure the pressure in the system. Make sure the water level is correct.
- Restart the pump to remove excess air.
- Tighten the contacts of the temperature sensor, replace the defective element.
F3 The burner has just ignited, and the sensor has already indicated the presence of a flame.
- Reloading technology.
- Diagnostics of the sensor and its wiring.
F4 No flame message.
- Inspect the gas fittings, unscrew the valve.
- Replace broken ignition electrode.
F8 The fuel supply is not closed in time. Checking fittings, wiring to the control module. Error F5 The air relay does not work. The system of air supply and removal of combustion products is being checked. The mine is inspected, pipes for clogging. F5 for Viessmann Vitopend
Problems with the removal of combustion products for a closed chamber.
Fan failure.
The coaxial chimney was installed incorrectly, causing the passage to freeze. The length of the pipe in the room should be from 1,5 meters. If the rules are not followed, a code appears.
Repair fan.
F6/E0 Thrust tipping controller has responded. Turn off and turn on the boiler from the socket. Install a good controller. F9 Burner control failure. Diagnostics of the modulation controller. F30 Burner blocked. The heating thermistor is shorted. Diagnostics and replacement. F38 The contacts of the temperature sensor are broken. Repair of a loop, tightening of contacts. F50 Shorted the temperature sensor of the single circuit model. Inspection and installation of a new sensor, cleaning contacts. F51 Hot water thermistor is defective. F58 Broken contacts of the boiler thermosensor. F59 No communication with hot liquid temperature sensor. b0 Traction stall controller shorted out. Replacing a defective element. b8 Traction tipping controller wiring break. A0 The pressure in the line has dropped. Wait for recovery, contact utility services.
Viessmann Vitogas fault codes
0F Adjustment mode started. 10 Outside temperature 0 degrees. Thermistor is defective. Diagnostics of the external thermosensor. 18 Outside temperature 0 degrees. The thermostat is open. 20 Adjustment is carried out without the participation of the thermistor. Feed temperature sensor shorted. The part is being replaced. 28 The contacts of the common thermal controller are open. Circuit inspection. 40
Here and below: problems with the temperature sensor.
Closed the sensor (short circuit) on the supply with the M2 mixer.
Diagnostics of the sensor and its circuit, contacts. Installation of the correct part. 44 Short circuit on M3. 48 Opening M2. 4C Open on M3. 50 Cylinder 1 sensor failure. 51 Cylinder 2 thermistor failure. 58 Open contacts in boiler 1. 59 Similar problem (58) in boiler 2. 60 Short circuit. 68 Open QJ0. 70 Shorted E3B. 78 Open E3B. 90-91 The temperature controller in the solar thermal system has shorted out. 92 Same as (90) only for S1 on Vitosolic. 93 Same as (90) for S2 on Vitosolic. 94 Breakdown (90) for S3 Vitosolic. 9A Opening S1 on the Vitosolic. 9b Fault (94) for S2 on the Vitosolic. 9C Fault (94) for S3 on Vitosolic. 9F Problems with the solar controller. Controller inspection. Repair. 9E Solar system consumes little volume. Make sure the system is working properly. Ab Boiler make-up configuration problem. Return the EJ0 plug to the socket. AC Configuration problems. AE Failure of the mixer drive board. Correct board installation. b1 No communication with the control unit. Tighten the connectors, change the defective elements. b4/ b5 Main board failure. Same as AE. bA No connection between module and mixer. You need to install a working module. bC The remote control is in the Vitotrol version, setting A1. Check the remote control cable connection. bd Error in communication between heating remote control 2 and mixer. EE Heating communication failure 3. C4 No contact with extension module. Inspection of cables, adapters. CE No contact with external protection elements. d6 Expansion module error. Diagnostics:
- input OE1 (d6);
- input DE2 (d7);
- input DE3 (d8).
d7 d8 dA (without mixer) Short circuit of the thermistor of the heating circuit 1, 2, 3. It is necessary to install a new part, repair the contacts. Db (without mixer) dC (with mixer) dd Circuit 1, 2, 3 temperature sensor open circuit. dE dF
As you can see, some codes indicate a current breakdown, others indicate the inclusion of a particular mode. In some cases, you can not do without contacting the service.