Baymak HT Condensing Error Codes
10E Error Code: Outdoor temperature sensor fault
20E Error Code: Central heating circuit NTC sensor fault
Replace the radiator NTC sensor.
28E Error Code: Flue NTC sensor fault
Replace the safety NTC.
50E Error Code: Domestic hot water circuit NTC sensor fault
Replace the hot water NTC sensor.
60E Error Code: Room thermostat sensor fault
Replace the room thermostat.
62E Error Code: Electronic card software version fault
There was an error in the system due to the electronic card power supply voltage.
Reinstall the software.
88E Error Code: Communication fault between electronic card and AVS 77 control unit
Reset the boiler max 5 times.
95E Error Code: AVS 77 control unit clock fault
Reset the boiler max 5 times.
110E Error Code: Safety thermostat fault
Press the OK button on the boiler panel twice. If the problem continues,
Wait 30 minutes and reset the boiler. If it repeats, contact us.
119E Error Code: Hydraulic pressure switch fault
The boiler water pressure is insufficient. Recommended value is between 1.5 and 2.0.
125E Error Code: No water or air in the system
Press the OK button on the boiler panel twice, the problem will be solved.
127E Error Code: Anti-legionella function active
This signal is temporary and will disappear automatically when the function ends.
130E Error Code: Flue NTC sensor overheating
Press the OK button on the boiler panel twice, the problem will be solved.
131E Error Code: Power cut after errors 125E or 130E
Press the OK button on the boiler panel twice, the problem will be solved.
133E Error Code: Insufficient gas warning
Make sure the gas valve next to your boiler is open.
Press the OK button on the boiler panel twice, the problem will be solved.
151E Error Code: Boiler control card fault. Check the ignition electrode position.
155E Error Code: Maximum reset attempts exceeded (n°5)
Press the “RESET” button on the boiler.
156E Error Code: Low or high voltage warning
Wait until the power supply voltage returns to normal.
The reset process will be done automatically by the device.
We recommend installing a regulator on your boiler.
160E Error Code: Fan fault
Your boiler’s fan motor is faulty.
193E Error Code: Air in the system. This signal is temporary and will disappear automatically when the function ends.

Baymak Brötje Quasar Error Codes
Baymak QUASAR 24 Fi
Baymak QUASAR 24 i
30° Light: Gas blockage indicator
40° Light: Overheat thermostat circuit open
50° Light: Fan fault or flue thermostat circuit open
60° Light: Water shortage or pump fault
70° Light: Domestic water sensor fault
80° Light: Heating circuit sensor fault

Baykan Boiler Error Codes
E 01 or LED 80°
Symbol shown when the boiler does not ignite or is blocked
E 02 or LED 60°
Code indicating air pressure switch fault
E 03 or LED 30°
Code indicating old heating thermostat
E 04 or LED 40°
Code indicating old tap water thermostat
E 08 or LED 50°
Insufficient installation pressure code
E 09 or LED 70°
Code related to safety thermostat activation
E 06 or LED 70°
Code related to water temperature exceeding 90°C
E 05 or LED 30° + LED 40°
Code related to abnormalities in modulator (controller)
E 07 or LED 80° + LED 60°
Code related to abnormalities in pump

ALARKO SERENA ERROR CODES

[E01] No flame - Make sure the gas valve and gas meter in the boiler are open and gas is supplied.
[E02] Limit thermostat fault
[H20] Water pressure fault
[E05] Heating sensor fault
[E06] Domestic water sensor fault
[E14] Differential pressure switch fault
[E22] Parameter programming request
[E35] Flame detection fault

ARISTON BOILER ERROR CODES

101 Overheating
501 No flame
103 Insufficient circulation
104 Insufficient circulation
105 Insufficient circulation
106 Insufficient circulation
107 Insufficient circulation
111 Insufficient circulation "Press fill button"
601 Exhaust smoke discharge fault
305 P.C.B. fault - Electronic card fault
306 P.C.B. fault - Electronic card fault
307 P.C.B. fault - Electronic card fault
607 Mainboard fault - Air circulation
677 Mainboard fault - Fan fault

Airfel Boiler Error Codes

C 20 - Radiator flow sensor fault
This error occurs when the NTC sensor on the radiator flow pipe malfunctions or shorts. Reset button may not work for this code.
C 40 - Radiator return sensor warning
This error occurs when the NTC sensor on the radiator return pipe malfunctions or shorts. Reset button may not work for this code.
C 28 - Flue gas sensor fault
Indicates flue gas sensor fault and inability to read flue gas temperature. Reset button may not work for this code.
C 78 - Pressure sensor fault
Indicates pressure sensor fault and inability to read water pressure. Reset button may not work for this code.
C 50 - Domestic water sensor fault
This error occurs when the NTC sensor on the plate heat exchanger malfunctions or shorts. Reset button may not work for this code.
C1 05 - Air bleeding program active
Indicates air bleeding program is running. Key symbol appears and will return to normal after a while.
C1 11 - Safety temperature exceeded
If the temperature read from sensors exceeds limit, this error appears. Use reset button and wait for device to activate.
C1 10 - Limit thermostat active
When radiator flow water reaches or exceeds 93°C, limit thermostat activates and shuts off boiler for safety. Use reset button and wait for boiler to activate.
C1 33 - Ignition fault
When there is a problem with flame formation or control in the burner, the mainboard gives this error. Use reset button and wait for device activation.
C1 17 - High water pressure fault
Indicates high water pressure in radiator circuit (above 2.5 bar). Drain water until LCD shows pressure 1.5.
C1 18 - Low water pressure fault
Indicates low water pressure in radiator circuit.
C1 54 - Radiator return water temperature higher than flow temperature
Temporary error. Boiler will return to normal operation soon.
C1 29 - Fan fault
Gives error if fan does not start.
C1 30 - Flue gas safety temperature exceeded
Indicates flue gas temperature is 80-90°C. Can occur if flue or condensate drain is blocked.
C1 56 - Faulty supply voltage
Gives error if there is a problem with supply voltage to the board.

PROTHERM PANTHER BOILER ERROR CODES

F0 - Low water in heating system
F1 - No flame
F2 - Radiator flow water sensor fault
F3 - Overheating
F5 - Outdoor air sensor fault

DEMİRDÖKÜM ADEN AND SOLARIS BOILER ERROR CODES

F0 - Heating circuit (CH) low pressure
F1 - Overheating safety thermostat fault
F2 - Domestic water circuit (DHW) temperature sensor fault
F3 - Heating circuit (CH) temperature sensor fault
F4 - Flame head (Ionization) fault (reset required)
F5 - Prosestat or flue sensor fault
F6 - Outdoor air sensor fault (OC connected and OTC ready, always off, CC outdoor sensor canceled signal)

ECA Confeo Digital and Confeo Premix Boiler Error Codes

t 6 Error Code: Flue gas sensor fault (open circuit)
t 6 Error Code: Flue gas sensor fault (short circuit)
t 2 Error Code: Flue gas over temperature warning
E 4 Error Code: Differential air pressure switch warning (short circuit)
E 5 Error Code: Differential air pressure switch warning (open circuit)
E 3 Error Code: Over temperature lockout (limit thermostat)
t 1 Error Code: Over temperature warning (electronic limit)
t 3 Error Code: Central heating temperature sensor fault (open circuit)
t 3 Error Code: Central heating temperature sensor fault (short circuit)
t 5 Error Code: Domestic hot water temperature sensor fault (open circuit)
t 5 Error Code: Domestic hot water temperature sensor fault (short circuit)
t 7 Error Code: Outdoor temperature sensor fault (short circuit)
E 1 Error Code: No flame lockout
E 2 Error Code: Wrong flame signal fault
d 1 Error Code: Flame circuit fault
C1 Error Code: Communication failure with mainboard
a 1 Error Code: Low voltage warning on mainboard
p 1 Error Code: Low water pressure warning
y 1 Error Code: Gas valve circuit fault (several causes; gas valve or ionization problem)

Falke Boiler Error Codes

E01 Gas supply – blockage fault
E02 Safety thermostat sensor
E03 Flue thermostat sensor / flue pressure sensor fault
E05 Heating circuit NTC sensor fault
E06 Domestic water circuit NTC sensor fault
E10 Low water pressure Check if system water pressure is appropriate.
E25 Maximum temperature warning
E35 Flame formation fault