I have a valiant turbo Max boiler which keeps locking out with fault
code f22 which is(low water or no water in the system)i have had a
valiant engineer around to fix the problem but he reckons it's a system
fault he said it needs a inhibitor adding to the system as the was non
added when the system was installed the engineer that fitted this
system at the time said it didn't require it the system is about four
years old,
I have flushed the system with a cleaning agent and added a inhibitor
and bled the system but after about four days the problem reappears,
I suspect it might be the PCB as there is new part number for the PCB
it looks like they have replaced the board,
I would appreciate any help or advice on the subject,
mike

In article .com,
mew wrote:
I suspect it might be the PCB as there is new part number for the PCB
it looks like they have replaced the board,
I would appreciate any help or advice on the subject,

There is a newer PCB for that boiler -- I had to get
one to fix an odd diverter valve problem. No idea
what else they changed on that board, though.

On Tue, 24 May 2005 07:29:11 -0700, mew wrote:

I have a valiant turbo Max boiler which keeps locking out with fault
code f22 which is(low water or no water in the system)i have had a
valiant engineer around to fix the problem but he reckons it's a system
fault he said it needs a inhibitor adding to the system as the was non
added when the system was installed the engineer that fitted this
system at the time said it didn't require it the system is about four
years old,
I have flushed the system with a cleaning agent and added a inhibitor
and bled the system but after about four days the problem reappears,
I suspect it might be the PCB as there is new part number for the PCB
it looks like they have replaced the board,
I would appreciate any help or advice on the subject,
mike

I had this on the only model that failed out of the box. It was due to
duff NTC(s) which were replaced under warranty.

So provided the pump is going and there is water in the system and the
auto air vent is working correctly then try new NTCs.



--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at http://www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html