FBH - running issues

theridler · 22nd October 2016, 11:47

Hi, I've just noticed that my FBH is running intermittently.
I have a later model unit which runs parking heater option and has the standard remote unit as well.
What happens is that it seems to start up OK, but after a while (maybe 10mins) it cuts out and then maybe starts up again. So say in the default 30 minute time of running it might go through 3 time periods of running. Any thoughts on what may cause it to cut out?
My only observations other than cutting out are that the unit hasn't (yet) tripped out on faults (i.e. 3 faults in a row?). The dosing pump seems to be ticking may be twice as often as it should once the unit has got through its initial feeding frenzy... When it cuts out there is a smell of fuel (but I would expect this if it has cutout?). Any thoughts from anyone??? Thanks for any input...

grivas · 22nd October 2016, 13:42

Quote:

Originally Posted by theridler

Hi, I've just noticed that my FBH is running intermittently.
I have a later model unit which runs parking heater option and has the standard remote unit as well.
What happens is that it seems to start up OK, but after a while (maybe 10mins) it cuts out and then maybe starts up again. So say in the default 30 minute time of running it might go through 3 time periods of running. Any thoughts on what may cause it to cut out?
My only observations other than cutting out are that the unit hasn't (yet) tripped out on faults (i.e. 3 faults in a row?). The dosing pump seems to be ticking may be twice as often as it should once the unit has got through its initial feeding frenzy... When it cuts out there is a smell of fuel (but I would expect this if it has cutout?). Any thoughts from anyone??? Thanks for any input...

Do a search for French Mike's article, ther you will find the answers you seek, good luck xxx

theridler · 22nd October 2016, 14:09

Yes done that ... was after other people's comments ... maybe better if I check on community forum ... I have indeed read an article by French Mike but thought maybe I could get further impressions from other people ???

Plezier · 22nd October 2016, 14:25

Quote:

Originally Posted by theridler

Yes done that ... was after other people's comments ... maybe better if I check on community forum ... I have indeed read an article br French Mike but thought maybe I could get further impressions from other people ???

Contact Phil T4 as I think he may well be able to sort it out for you.

theridler · 22nd October 2016, 15:33

http://www.the75andztclub.co.uk/foru...ad.php?t=71982

http://www.the75andztclub.co.uk/foru...ad.php?t=56075

These 2 threads??

FrenchMike · 22nd October 2016, 15:55

Quote:

Originally Posted by theridler

http://www.the75andztclub.co.uk/foru...ad.php?t=71982

http://www.the75andztclub.co.uk/foru...ad.php?t=56075

These 2 threads??

Hi, hum cutting out after 10 minutes is uncommon !

Try maintaining pin 3 to earth and see.

It could be be a flame out rather an overheating (77 degrees)

At power max (5 kw) the dosing pump rate is 2.38 pulses /second

Mike

theridler · 22nd October 2016, 18:17

Hi Mike - thanks for the reply ... was wondering about either flame cutting out or fuel supply ... 10 minutes may have been less ... but pretty sure it makes it out of first 4-5 minutes... will check a bit more. The pcb is one you fixed for me one or two years ago ...

FrenchMike · 22nd October 2016, 18:38

Quote:

Originally Posted by theridler

Hi Mike - thanks for the reply ... was wondering about either flame cutting out or fuel supply ... 10 minutes may have been less ... but pretty sure it makes it out of first 4-5 minutes... will check a bit more. The pcb is one you fixed for me one or two years ago ...

Yes John,i remember but a question :are you sure it produces heat ?
or can your hear the pulsing pump clicking ? (30 sec after start ).

In doubt,send me the PCB for check

Mike

theridler · 22nd October 2016, 19:03

Yes pump is clicking and can feel heat from exhaust... not sure if dosing pump stops first or the circulation pump stops first

FrenchMike · 22nd October 2016, 19:23

Quote:

Originally Posted by theridler

Yes pump is clicking and can feel heat from exhaust... not sure if dosing pump stops first or the circulation pump stops first

Do you test it as parking heater (auxiliary command on pin 3)

Or normally as engine heater aid (external temp less than 5 deg) on pin 1

22nd October 2016, 11:47	#1
theridler Gets stuck in ZT-T+ CDTi '54 reg Join Date: Oct 2012 Location: Newark Posts: 973 Thanks: 199 Thanked 120 Times in 107 Posts	FBH - running issues Hi, I've just noticed that my FBH is running intermittently. I have a later model unit which runs parking heater option and has the standard remote unit as well. What happens is that it seems to start up OK, but after a while (maybe 10mins) it cuts out and then maybe starts up again. So say in the default 30 minute time of running it might go through 3 time periods of running. Any thoughts on what may cause it to cut out? My only observations other than cutting out are that the unit hasn't (yet) tripped out on faults (i.e. 3 faults in a row?). The dosing pump seems to be ticking may be twice as often as it should once the unit has got through its initial feeding frenzy... When it cuts out there is a smell of fuel (but I would expect this if it has cutout?). Any thoughts from anyone??? Thanks for any input... __________________ Regards John [SIGPIC][/SIGPIC]

22nd October 2016, 14:09	#3
theridler Gets stuck in ZT-T+ CDTi '54 reg Join Date: Oct 2012 Location: Newark Posts: 973 Thanks: 199 Thanked 120 Times in 107 Posts	Yes done that ... was after other people's comments ... maybe better if I check on community forum ... I have indeed read an article by French Mike but thought maybe I could get further impressions from other people ??? __________________ Regards John [SIGPIC][/SIGPIC] Last edited by theridler; 25th October 2016 at 07:56..

22nd October 2016, 15:33	#5
theridler Gets stuck in ZT-T+ CDTi '54 reg Join Date: Oct 2012 Location: Newark Posts: 973 Thanks: 199 Thanked 120 Times in 107 Posts	http://www.the75andztclub.co.uk/foru...ad.php?t=71982 http://www.the75andztclub.co.uk/foru...ad.php?t=56075 These 2 threads?? __________________ Regards John [SIGPIC][/SIGPIC] Last edited by theridler; 22nd October 2016 at 15:35..

22nd October 2016, 18:17	#7
theridler Gets stuck in ZT-T+ CDTi '54 reg Join Date: Oct 2012 Location: Newark Posts: 973 Thanks: 199 Thanked 120 Times in 107 Posts	Hi Mike - thanks for the reply ... was wondering about either flame cutting out or fuel supply ... 10 minutes may have been less ... but pretty sure it makes it out of first 4-5 minutes... will check a bit more. The pcb is one you fixed for me one or two years ago ... __________________ Regards John [SIGPIC][/SIGPIC]

22nd October 2016, 19:03	#9
theridler Gets stuck in ZT-T+ CDTi '54 reg Join Date: Oct 2012 Location: Newark Posts: 973 Thanks: 199 Thanked 120 Times in 107 Posts	Yes pump is clicking and can feel heat from exhaust... not sure if dosing pump stops first or the circulation pump stops first __________________ Regards John [SIGPIC][/SIGPIC] Last edited by theridler; 22nd October 2016 at 19:12..