Help - Vaillant EcoMax Pro 18E

[Minotaur]

Tearing my left over hair out. Boiler is just not activating

Fault Code 11
Sub screen code - Flame picture with Electrical sign, Code 2

Symptoms
- On switching on Boiler - Slight ,i mean slight, jerk on fan as if it was
going to start

- Pump does not switch on ( pump checked, works)

Tried
1) Motherboard Changed
2) Voltage checked as per valliant Fault finding diagram

Ask Vaillant | Domestic Boilers | Vaillant

Suspicious of Fan ?
If Fan is defective, would the pump Not switch on ?

Have explored all over and just cannot reach any decisive answers

My presumptions is on start up ( if there is a demand )
1) Pump Would switch on
2) Then Fan would start up ?

The LED status is showing Green

I have attached a document with the fault pics

Any pointers / solutions would be much appreciated. Am relatively new to this field and trying to find my way around ( slowly ) through fault finding

 

[chris watkins]

MI's state F11 = Connection fault between main PCB and interface; Faulty interface; Faulty main PCB (processor), Check fan

Hi Minotaur Welcome, You might not get much more help until you show GS Registered.

 

[Minotaur]

Hi - Yes - I went through all those process's ie Interface, new PCB etc. Although "Check Fan" is rather ambiguous

I am GS registered. Have entered my membership number. Unsure how else to show it ? Mind you, have only registered on to the site this morning

 

[chris watkins]

It will need to be checked by a Mod (when they wake up)

"Check Fan" is rather ambiguous

= is there voltage to the fan?

 

[Minotaur]

ah - Yes - Mods
Yes, there is voltage supply upto the fan. Have checked the voltage and it matches broadly what is specified

 

[sammathias]

@ShaunCorbs

 

[ShaunCorbs]

Send us your gsr number

And do 10 (7 more ) non spamming posts

Thread closed until it's moved