Greenstar 24i Junior - HW ok but no CH - Low Pressire

[FeelingCold]

Hi
Our Worcester Bosch 24i Junior has Low Pressure - just on zero at the moment. With the cool change it seems like we need to get the CH cranked up again.

Can the system be repressurised by a novice; and then where do I look?
I can't see any obvious knobs or switches to turn.

Or should this be a service call?

Thanks
Andy

 

[Billy Bob Bob]

there is a white cover under the boiler slide it forward and it will fall off do you see a white key?

 

[FeelingCold]

Yes I did see that

 

[Billy Bob Bob]

look under the boiler,put the key into the black receiver under the boiler and slowly open the black or grey control knob next to it,if the keys in correctly the gauge will rise close the black or grey knob/tap when the gauge hits 1 bar

 

[FeelingCold]

So I guess I turn that one way or the other. Do I keep it in one position and then turn it back after a period of time?

(Also you were so quick in replying - wow! thank you)

 

[twistednuts]

Cant wait for this.......

 

[FeelingCold]

OK I'll give it a try shortly.

 

[Billy Bob Bob]

if your stuck watch this How do I repressurise my combi boiler with an internal filling key ? - Worcester, Bosch Group UK homeowner site

 

[twistednuts]

i once tried to explain how to fill a worcester with a key over the phone, to a lady. I was on some time

 

[Billy Bob Bob]

i once tried to explain how to fill a worcester with a key over the phone, to a lady. I was on some time

yes its a stupid idea much like where worcester fit the safety valve

 

[fuzzy]

just dont leave it on too long or youll get a freight when the pressure relief valve opens :shocked:

 

[FeelingCold]

OK Gasman - you are the legend!

Twstednugts - thanks for the encouragement.

Video was very clear. The key was already insitue. Pressure is now up at about 1.6 so all good on that score. My next issue is that the wireless control receiver has an alarm (red light). It is an Iflo Digistat +2RF. The receiver has two buttons Learn Mode 1 and 2. The green on button is on only when I press #2. The red alarm light is constantly on. I have turned the power on and off for the boiler. Any ideas as to a solution?

 

[stevetheplumber]

google mfor the instructions ?

 

[Billy Bob Bob]

OK Gasman - you are the legend!

Twstednugts - thanks for the encouragement.

Video was very clear. The key was already insitue. Pressure is now up at about 1.6 so all good on that score. My next issue is that the wireless control receiver has an alarm (red light). It is an Iflo Digistat +2RF. The receiver has two buttons Learn Mode 1 and 2. The green on button is on only when I press #2. The red alarm light is constantly on. I have turned the power on and off for the boiler. Any ideas as to a solution?

take the temp on the stat right down then up high enough so the flame symbol re appears that should recommission it

 

[tamz]

Take the battery cover off the bottom right of the stat and pull a battery out.
Go to the receiver, press button 1 then at the same time button 2 and hold them in for about 5 seconds.
The red light will flash then when it goes out return to the stat and put the battery back in and turn it up/on

 

[FeelingCold]

OK I downloaded the instructions and video at www.draytoncontrols.co.uk and took the stat temp down and up as instructed.
I also changed the AA batteries just in case. (I couldn't change the little flat battery inside the stat though - it seems immovable.)
I think I may have an issue with the SCR itself. When recommissioning that from boiler power down and back up again, I was expecting the boiler to fire up on pressing the override button 2. It does light up green but does not fire the boiler.

Further I took the stat to the SCR to recommission the RF connection but the SCR does NOT flash red which I believe indicates that the signal is not being received by the SCR.

 

[FeelingCold]

I will try again holding the buttons down for longer

 

[tamz]

Turn the power switch to the boiler off for a few seconds and back on again. Sometimes they lock up and don't respond to pressing buttons. Then recommission it.

 

[FeelingCold]

Tried that twice - no success sadly.

I must say that the advice coming through here is just fantastic. Thank you all so much.

 

[FeelingCold]

and I just found the thank you button.

 

[Billy Bob Bob]

Tried that twice - no success sadly.

I must say that the advice coming through here is just fantastic. Thank you all so much.

no probs sounds like you may need a new rf stat,my experience of rf devices are they are not the most reliable things in the world see if its viable to get a cable to the replacement stat they give much less trouble

 

[FeelingCold]

Thanks Gasman
Yes I found another thread about the RF3 which has similar problems. I was able to hit the "spanner" button for about 10 seconds to fire up the CH - so at least I know that the boiler itself works. It does still seem odd to me though that I can't get the override button on he SCR to fire up the CH.
Positioning of 'just about everything' basically precludes cable replacement. I'll call my local guy next week for a service anyway as I don't think we have had it looked at since it was installed in 2008. (Pitty you weren't in my area. You would definitely get my businesses.)

 

[Billy Bob Bob]

when i say cable i mean a cable from boiler to stat if its possible much more reliable than rf devices for your replacement in rf consider Honeywell they are the best but can still go wrong if the installer tries to fit anything made by salus refuse its real poor quality kit