STAND-ALONE CONTROL UNIT WITHOUT SUPPLY TEMPERATURE SENSOR (SUPPLY TEMPERATURE MIGHT NOT BE HIGH ENOUGH) SHORT CIRCUIT – COMMON SUPPLY TEMPERATURE SENSOR
VITOCONTROL-S WITH VITOTRONIC 100 / VITOTRONIC 300-K WITH VITOTRONIC 200
VITOCONTROL-S CONTROLS IN A STAND-ALONE MANNER WITHOUT SUPPLY TEMPERATURE SENSOR (SUPPLY TEMPERATURE MIGHT NOT BE HIGH ENOUGH) COMMON SUPPLY TEMPERATURE SENSOR SHORTED OUT
VITOCROSSAL 300
REGULATES WITHOUT SUPPLY TEMPERATURE SENSOR (LOW-LOSS HEADER) SHORT CIRCUIT – SYSTEM FLOW TEMPERATURE SENSOR
VITODENS 200-W / 222-F
REGULATES WITHOUT SUPPLY TEMPERATURE SENSOR (LOW-LOSS HEADER) SHORT CIRCUIT – SUPPLY SYSTEM TEMPERATURE SENSOR
VITOTRONIC 020/200-H / 200 / 200-H / 300
MIXING VALVE CLOSES OR CLOSED SHORT CIRCUIT – SUPPLY TEMPERATURE SENSOR / MIXING VALVE CIRCUIT M1
VITORONIC 300-K WITH VITOTRONIC 100
VITOTRONIC 300-K, MW1S CONTROLS IN A STAND-ALONE MANNER WITHOUT STRAP-ON SENSOR (SUPPLY TEMPERATURE MIGHT NOT BE HIGH ENOUGH) SHORT CIRCUIT – STRAP-ON TEMPERATURE SENSOR
VITODENS 200-W
REGULATES WITHOUT SUPPLY TEMPERATURE SENSOR (LOW LOSS HEADER) SYSTEM SUPPLY TEMPERATURE SENSOR SHORTED OUT
Fault Code 55, 56 and 57
BOILER MODEL
SYSTEM BEHAVIOUR & DIAGNOSIS
VITOTRONIC 300-K WITH VITOTRONIC 200
CONTROL MODE MAINTENANCE OR FAULT ON VITOTRONIC 100 OF BOILER 5-8
Fault Code EE and EF
BOILER MODEL
SYSTEM BEHAVIOUR & DIAGNOSIS
VITODENS 100-W / 200 / 0 / VITOTRONIC 300
BURNER BLOCKED FAULTY AIR PRESSURE SWITCH – AIR DAMPER (FLAP) STUCK
Fault Code FE4
BOILER MODEL
SYSTEM BEHAVIOUR & DIAGNOSIS
VITOCROSSAL 200
BURNER SHUTS DOWN MULTIPLE DETECTION OF UNDERVOLTAGE
Fault Code F-B7, F-F4, F-F2, F-F7, F-F8 and F-F9
BOILER MODEL
SYSTEM BEHAVIOUR & DIAGNOSIS
VITOCROSSAL 200
CASE A: BURNER CONTROL UNIT IN A FAULT STATE; SYSTEM COOLS DOWN; BURNER CONTROL LOCKED OUT. CASE B: TYPE OF CODING CARD CASE A: CODING CARD NOT INSERTED IN THE BURNER CONTROL UNIT; FAULTY OR INCORRECT CODING CARD. CASE B: CODING CARD DOES NOT MATCH BURNER CONTROL UNIT
Fault Code 50, 51, 58 and 59
BOILER MODEL
SYSTEM BEHAVIOUR & DIAGNOSIS
VITODENS 200-W / 222-F
NO DHW HEATING / FAULT WITH DHW SHORT CIRCUIT/OPEN CIRCUIT – DHW TANK TEMPERATURE SENSOR OR LEAD BREAK
Fault Code A9, BA, BB, BC & FE0
BOILER MODEL
SYSTEM BEHAVIOUR & DIAGNOSIS
VITODENS 200
BOILER COOLS DOWN SENSOR INPUTS ARE NOT READ CORRECTLY
Fault Code F-FA, F-FB and FR
BOILER MODEL
SYSTEM BEHAVIOUR & DIAGNOSIS
VITOCROSSAL 200 / 400-620 / 186-311
FAN RUNS WITHOUT DEMAND; BURNER CONTROL UNIT IN A FAULT STATE FAN NOT STOPPED; CABLE 100A FAULTY; FAN FAULTY; BURNER CONTROL UNIT FAULTY
Fault Code 8C, 8D, 8E and 8F
BOILER MODEL
SYSTEM BEHAVIOUR & DIAGNOSIS
VITOTRONIC 300
BURNER CONTROL UNIT IN A FAULT STATE LEAD BREAK, BOILER WATER TEMPERATURE SENSOR, BURNER CONTROL UNIT
Fault Code 52
BOILER MODEL
SYSTEM BEHAVIOUR & DIAGNOSIS
VITOTRONIC 300
CONTROL MODE SHORT CIRCUIT – SUPPLY TEMPERATURE SENSOR LOW-LOSS HEADER
VITODENS 100-W COMBIPLUS
BURNER BLOCKED (COMBIPLUS ONLY) FLOW SENSOR SHORTED OUT
Fault Code 38
BOILER MODEL
SYSTEM BEHAVIOUR & DIAGNOSIS
VITODENS 200-W / 222-F / COMBIPLUS
BURNER BLOCKED BOILER WATER TEMPERATURE SENSOR CABLE BROKEN
BURNER IS SWITCHED ON AND OFF BY ADJUSTABLE HIGH LIMIT OPEN CIRCUIT – BOILER TEMPERATURE SENSOR
VITOTRONIC 300-K WITH VITOTRONIC 300
BURNER IS STARTED AND STOPPED VIA A TEMPERATURE CONTROLLER LEAD BREAK, BOILER WATER TEMPERATURE SENSOR
VITODENS 100-W
BURNER BLOCKED BOILER WATER TEMPERATURE SENSOR LEAD BROKEN
Fault Code A7
BOILER MODEL
SYSTEM BEHAVIOUR & DIAGNOSIS
VITOCONTROL-S WITH VITOTRONIC 100 /VITOTRONIC 100 / VITOTRONIC 300-K WITH VITOTRONIC 300
CONTROL MODE ISOLATION VALVE CONFIGURATION FAULT – OC:2, OC:3 OR OC:4 SET AND CODING 4E:1 NOT SET
Fault Code 0F
BOILER MODEL
SYSTEM BEHAVIOUR & DIAGNOSIS
VITODENS 222-F
CONTROL MODE CODE 0F IS ONLY DISPLAYED IN THE FAULT HISTORY (SERVICE REQUIRED)
VITOTRONIC 300 / VITOTRONIC 300-K WITH VITOTRONIC 300 / VITODENS 200-W / VITOCONTROL-S WITH VITOTRONIC 100
CONTROL MODE – CONTROLLED OPERATION CODE 0F IS ONLY DISPLAYED IN THE FAULT HISTORY (SERVICE REQUIRED)
VITOTRONIC 200 /300
NORMAL OPERATION SERVICE REQUIRED
VITOCONTROL-S, MW1 WITH VITOTRONIC 100 / VITOTRONIC 300-K, MW1S WITH VITOTRONIC 100
CONTROL MODE MAINTENANCE 0F IS ONLY DISPLAYED IN THE FAULT HISTORY
Fault Code E1, E7, E8, E9, EA, EB, EC and FF2
BOILER MODEL
SYSTEM BEHAVIOUR & DIAGNOSIS
VITODENS 200-W / 222-F /VITOTRONIC 300
BURNER IN FAULT MODE HEATING WATER FLOW RATE TOO LOW DURING CALIBRATION; FLOW SWITCH CAUSED SHUTDOWN
Fault Code 29, 41, 49, F80, F81, F83, F88 and F89
BOILER MODEL
SYSTEM BEHAVIOUR & DIAGNOSIS
VITOTRONIC 200 / 300
NORMAL OPERATION WITHOUT INFLUENCE OF RETURN WATER TEMPERATURE OPEN CIRCUIT 1 OR 2 – RETURN WATER TEMPERATURE SENSOR (OF MIXING VALVE CIRCUIT 1)
Viessmann Boiler Fault Code A3, B0, F1, E-E1 and F-E2
BOILER MODEL
SYSTEM BEHAVIOUR & DIAGNOSIS
VITOCROSSAL 300 / VITODENS 200-W / 222-F / 300
CONTROL MODE (STAYS IN FACTORY DEFAULT SETTING) FAULTY PROGRAMMING UNIT
Fault Code 28
BOILER MODEL
SYSTEM BEHAVIOUR & DIAGNOSIS
VITOCONTROL-S WITH VITOTRONIC 100
VITOCONTROL-S, VD2/CT3/CM2 CONTROLS IN A STAND-ALONE MANNER W/O SUPPLY TEMPERATURE SENSOR (SUPPLY TEMPERATURE MIGHT NOT BE HIGH ENOUGH) OPEN CIRCUIT – COMMON SUPPLY TEMPERATURE SENSOR
VITOCONTROL-S WITH VITOTRONIC 100 / VITOTRONIC 300-K WITH VITOTRONIC 100
VITOCONTROL-S, WB2B CONTROLS IN A STAND-ALONE MANNER W/O SUPPLY TEMPERATURE SENSOR (SUPPLY TEMPERATURE MIGHT NOT BE HIGH ENOUGH) COMMON SUPPLY TEMPERATURE SENSOR CABLE BROKEN
VITOCROSSAL 300 / VITODENS 200-W / 22-F
REGULATES WITHOUT SUPPLY TEMPERATURE SENSOR (LOW-LOSS HEADER) SYSTEM SUPPLY TEMPERATURE SENSOR CABLE BROKEN
VITOTRONIC 050/200-H
MIXING VALVE CLOSES CABLE BREAK – SUPPLY TEMPERATURE SENSOR
VITOTRONIC 050/200-H
MIXING VALVE IS CLOSED OPEN CIRCUIT – SUPPLY TEMPERATURE SENSOR OF MIXING VALVE CIRCUIT M1
VITOTRONIC 200-H / VITOTRONIC 200 / 300
MIXING VALVE IS BEING CLOSED LEAD BREAK, SUPPLY TEMPERATURE SENSOR, HEATING CIRCUIT WITH MIXING VALVE M1 (HEATING CIRCUIT 1)
VITOTRONIC 300 / 300-K WITH VITOTRONIC 300 / 200
STAND-ALONE CONTROL UNIT WITHOUT SUPPLY TEMPERATURE SENSOR (SUPPLY TEMPERATURE MIGHT NOT BE HIGH ENOUGH) LEAD BREAK, COMMON SUPPLY TEMPERATURE SENSOR
VITOTRONIC 300-K WITH VITOTRONIC 100
VITOTRONIC 300-K, MW1S CONTROLS IN A STAND-ALONE MANNER W/O STRAP-ON SENSOR (SUPPLY TEMPERATURE MIGHT NOT BE HIGH ENOUGH) OPEN CIRCUIT – STRAP-ON TEMPERATURE SENSOR
Fault Code B1
BOILER MODEL
SYSTEM BEHAVIOUR & DIAGNOSIS
VITOCONTROL-S WITH VITOTRONIC 100 / VITOTRONIC 100 / 200 / 300 / VITOTRONIC 300-K WITH VITOTRONIC 100
EMISSIONS TEST MODE INTERNAL ELECTRONICS FAULT
VITOCONTROL-S WITH VITOTRONIC 100 / VITODENS 200-W
REGULATES AS IF THE OUTSIDE TEMPERATURE IS 32°F (0°C) INTERNAL FAULT
VITOTRONIC 020/200-H
UNDEFINED CONTROL CHARACTERISTICS INTERNAL ELECTRONICS FAULT
CONTROL MODE – LEAD BREAK, LOW-LOSS HEADER SUPPLY TEMPERATURE SENSOR BURNER BLOCKED / CONTROL MODE – SENSOR CABLE BROKEN
CC and F0
BURNER IN FAULT MODE IONISATION CURRENT TOO HIGH DURING CALIBRATION – BOILER TEMPERATURE LIMITER RESPONDED (F2) – AIR OR BLOCKAGE IN SYSTEM/PUMP FAILURE
B6
CONTROL MODE OPEN CIRCUIT – KM BUS TO SOLAR CONTROL UNIT – EXTENSION AM1 / DE1-DE3 M1 – COMMUNICATION FAULT
D5
BURNER BLOCKED FLUE GAS TEMPERATURE SENSOR NOT PROPERLY POSITIONED / CHECK SENSOR EXTERNAL PUMP FITTED ON THE SYSTEM (100-W) A-3 FAULT
60, 68, 70, 78, BD, BE and BF
NO OUTPUT REDUCTION – RETURN CONTROL OPEN – BOILER WITH MAXIMUM TEMPERATURE SHORT/OPEN CIRCUIT – TEMPERATURE SENSOR [17A]
E2 and E3
BURNER BLOCKED – FAULT: SUPPLY VOLTAGE 24V
40 and 44
MIXING VALVE CLOSES HEATING CIRCUIT 2 WITH MIXING VALVE SUPPLY SHORT CIRCUIT ON TEMPERATURE SENSOR
48 and 4C
MIXING VALVE CLOSES OR CLOSED HEATING CIRCUIT 2 WITH MIXING VALVE SUPPLY TEMPERATURE SENSOR CABLE BROKEN / OPEN CIRCUIT
FC
BURNER IN FAULT MODE GAS VALVE FAULTY OR FAULTY MODULATION VALVE CONTROL / OR VENT SYSTEM BLOCKED. CHECK THE FAN, FAN CABLE AND PCB
FE
BURNER BLOCKED OR IN FAULT MODE STRONG INTERFERENCE (EMC) FIELD NEARBY OR FAULTY MAIN PCB
B2
CONTROL MODE – INTERNAL ELECTRONICS FAULT
B5
CONTROL MODE – EXTERNAL SAFETY EQUIPMENT
80, 81, 82, 83 and FD
BURNER CONTROL UNIT IN A FAULT STATE; SYSTEM COOLS DOWN; BURNER CONTROL UNIT LOCKED OUT SHORT CIRCUIT – BOILER WATER TEMPERATURE SENSOR, BURNER CONTROL UNIT
B4
NORMAL OPERATION / FAULT AROUND BURNER CONTROL UNIT INTERNAL FAULT (PCB)
C2-C8, CD-CF, D2-D8, DA-DF and E0
BOILER COOLS DOWN FIXED HIGH LIMIT HAS RESPONDED OR FUSE F2 HAS BLOWN
F5
GAS PRESSURE SWITCH SHOWS NO GAS PRESSURE / ELECTRICAL CONNECTION FAULT GAS SHUT-OFF VALVE CLOSED; GAS PRESSURE SWITCH FAULTY; MULTIPLE GAS PROBLEMS WITH GAS SUPPLY
F6, 58, F9, F-E1, F-E2 and F-F6
BURNER IN FAULT MODE / EMERGENCY OPERATION FAN NOT AT STANDSTILL / PLUG-IN CONNECTION
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James Elston has over 15 years experience in the solar panel and central heating industry. His expertise are key in ensure Green Central’s customers receive the best solar panels, batteries and installation service all round. Over the years James has overseen over 20,000 home heating installations and his knowledge in this industry is second to none.
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Recently had solar panels fitted by Green Central and I can’t speak highly enough of the team. The whole experience has been trouble free and I would recommend them to anyone thinking about having solar panels installed – 10/10!
Rob Schofield
Our installation is now complete! 8 solar panels fitted and the journey from initial consultation through to the end product has been seamless. Hats off Green central, Credit where it’s due. Will definitely spread the word!
Sam
Recently had six solar panels fitted on my house by Green Central and I couldn’t have asked for a better service. In particular, I have to highlight the exceptional communications through out, the over all smooth running process and completely stress free experience, all down to Green Central. I now have grid independence which is valuable beyond estimation.
