Fault Code / Fault Image | System Behaviour |
1 | Flame lockout after several ignition attempts |
2 | False flame |
3 | High water temperature limit |
5 | No tacho from fan |
8 | Flame circuit error |
9 | Valve driver circuit error |
11 | Flow/return sensor calibration error |
12 | Default lockout |
13 | Elapsed the number of retrials |
21 | ADC error |
26 | Flame signal lost 5 times in 4 minutes |
31 | Centra heating supply sensor error (open or short) |
44 | Central heating rerturn sensor error (open or short) |
7 | High flue gas tempurature |
25 | CRC error |
30 | Boiler flow temprature sensor short circuit |
31 | Boiler flow temperature sensor open ciruit |
32 | Domestic hot water temperature sensor short circuit |
33 | Domestic hot water temperature sensor open circuit |
34 | Low mains supply voltage |
37 | Low system water pressure |
40 | High system water pressure |
41 | No water pressure signal recievced fom MMI |
45 | Flue gas temperature sensor short circuit |
46 | Flue gas temperature sensor open circut |
47 | Water pressure sensor open circuit |
99 | Communication MMI -ESYS lost |
E01 | Ignition lockout |
E02 | False flame lockout |
E03 | Overheat lockout |
E05 | Fan fault |
E08 | Flame circuit failure |
E09 | Valve feed back error |
E12 | EEPROM lockout |
E15 | Sensor drift lockout |
E16, E17, E18 | Sensor stuck lockout |
E21 | ADC lockout |
E33 | Return thermistor fault |
E34 | Low power supply lockout |
E35 | Flow thermistor fault |
F07 | Exhaust sensor fault |
F13 | Remote reset lockout |
F37 | Low water pressure |
F40 | Water pressure too high |
F47 | Water pressure sensor not connected |
F52 | Domestic hot water (DHW) sensor fault |
F53 | Flue temperature sensor lockout |