Google Groups no longer supports new Usenet posts or subscriptions. Historical content remains viewable.
Dismiss

Drayton Digistat SCR receiver problems

4,341 views
Skip to first unread message

jmil...@googlemail.com

unread,
Oct 24, 2013, 1:27:09 PM10/24/13
to
Hi all

My heating has packed up tonight and it looks like it's the SCR receiver that's at fault. There are no lights showing on it and am getting no repsonse when I change the temp on the wireless thermostat. I've taken the SCR off of it's wall mount and confirmed that there is 240v across the N and L

Am I safe to assume that it is the unit that is at fault ie if there is power there should the red led light up when the unit is mounted or do I need to test the other 3 terminals as well (if so how)

Any ideas what the fault could be, I've seen plenty of posts about having a green light with no action because of a faulty capacitor but nothing where the units doesn't light up at all

Lastly if I do need a nw receiver where is the cheapest place to get them or is there a non branded equivalent I could use

Many Thanks

Jim

Harry Bloomfield

unread,
Oct 24, 2013, 2:08:20 PM10/24/13
to
jmil...@googlemail.com expressed precisely :
> Hi all
>
> My heating has packed up tonight and it looks like it's the SCR receiver
> that's at fault. There are no lights showing on it and am getting no repsonse
> when I change the temp on the wireless thermostat. I've taken the SCR off of
> it's wall mount and confirmed that there is 240v across the N and L
>
> Am I safe to assume that it is the unit that is at fault ie if there is power
> there should the red led light up when the unit is mounted or do I need to
> test the other 3 terminals as well (if so how)

Have you tried power cycling?
Have you checked the battery in remote stat?
Have you tried re-pairing the two?
Have you tried moveing the remote stat closer to the receiver?

--
Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk


jmil...@googlemail.com

unread,
Oct 24, 2013, 2:29:15 PM10/24/13
to
On Thursday, October 24, 2013 7:08:20 PM UTC+1, Harry Bloomfield wrote:
>
>
> Have you tried power cycling?
>
> Have you checked the battery in remote stat?
>
> Have you tried re-pairing the two?
>
> Have you tried moveing the remote stat closer to the receiver?
>
>
>
> --
>
> Regards,
>
> Harry (M1BYT) (L)
>
> http://www.ukradioamateur.co.uk

I've already tried killing the power to the receiver and removed the batteries in the stat (a RF3 by the way)

But problem is that the receiver will not power up so can't re-pair the 2 :(

Cheers

Jim



Harry Bloomfield

unread,
Oct 24, 2013, 5:45:20 PM10/24/13
to
jmil...@googlemail.com submitted this idea :
Sorry, I cannot really help beyond that, I have no experience of the
unit.

Bob Minchin

unread,
Oct 25, 2013, 3:42:38 AM10/25/13
to
In true DIY tradition, open it up and investigate the internals.
Start with the power supply as most likely culprit.

geoffro...@gmail.com

unread,
Oct 7, 2015, 1:44:25 PM10/7/15
to
Hi Jim

Did you resolve the problem you had with the Digistat SCR?
I have no lights, but power is present at rear of SCR unit

Same issue as you I think.

Did you work out how to fix it?

Geoff

southpaw7

unread,
Feb 4, 2016, 4:44:03 PM2/4/16
to
replying to jmileman , southpaw7 wrote:
Turn the boiler off at the switch and then while holding down both buttons
on the receiver switch the boiler back on.

Read more:
http://www.diynot.com/diy/threads/digistat-receiver-scr-not-working-stopped-working.452609/#ixzz3zDxCWx4E



--


JohnW

unread,
Feb 5, 2016, 12:45:03 PM2/5/16
to
I had this problem and it was the capacitor mentioned in many posts and on YouTube. Replacement caps are available on eBay and easy to fit if you can solder. Search eBay for digistat capacitor, they are around £4, or around £15 if you want them fitted for you.
John
Message has been deleted

Doug Bonnar

unread,
Dec 11, 2017, 5:44:07 PM12/11/17
to
replying to southpaw7, Doug Bonnar wrote:
This worked perfectly on coldest day of the year ... thanks southpaw7

--
for full context, visit https://www.homeownershub.com/uk-diy/drayton-digistat-scr-receiver-problems-930270-.htm


Ozzy

unread,
Jan 18, 2018, 4:44:09 PM1/18/18
to
replying to jmileman, Ozzy wrote:
Dear Mr Jim

If your boiler's Digisat SCR wireless receiver is not receiving signal it
means there is miscomunicatin between thermostat and receiver they both do not
communicate.

Best thing to do

First switch off boiler from main socket and wait for 5 minutes

And then turn on the socket then this will resolve your issue.

Many thanks

Bob

unread,
Jan 18, 2018, 5:14:04 PM1/18/18
to
replying to Ozzy, Bob wrote:
He's probably sorted it in the last four years.

Susan

unread,
Mar 19, 2018, 4:14:05 PM3/19/18
to
replying to southpaw7, Susan wrote:
Hello southpaw7, just came across this thread today, I'm freezing cold with no
heating for hours and have just tried this tip and it worked!! Thank you soooo
much.

Richard

unread,
Nov 4, 2018, 2:44:04 PM11/4/18
to
replying to Harry Bloomfield, Richard wrote:
How do you repair the two

RaeJayy

unread,
Mar 14, 2019, 11:44:04 AM3/14/19
to
replying to southpaw7, RaeJayy wrote:
we need a southpaw7 appreciation day! just done this and it worked!! thank you!

Roger

unread,
Jun 30, 2019, 11:14:04 AM6/30/19
to
replying to southpaw7, Roger wrote:
Tried the advice of southpaw7 - it worked first time! Many, many thanks
southpaw7

toja

unread,
Oct 7, 2019, 8:44:06 PM10/7/19
to
replying to southpaw7, toja wrote:
"http://www.diynot.com/diy/threads/digistat-receiver-scr-not-working-stopped-working.452609/#ixzz3zDxCWx4E"
that has worked even with my old wr1 and a boiler. I have switched of the fuse
of the boiler off for 5 minutes. Then turn it on and run quickly to press the
top 2 buttons for 15 seconds. My heating worked shortly after! THANKS!!

jay

unread,
Jan 10, 2021, 11:01:15 AM1/10/21
to
Southpaw7, Topman... Thank you...it worked straight away... No waiting.

--
For full context, visit https://www.homeownershub.com/uk-diy/drayton-digistat-scr-receiver-problems-930270-.htm

Fredxx

unread,
Jan 10, 2021, 11:09:18 AM1/10/21
to
On 10/01/2021 16:01, jay wrote:
> Southpaw7, Topman... Thank you...it worked straight away... No waiting.

You are welcome to post here, but please read the following before
replying to a 7 year old post:
http://wiki.diyfaq.org.uk/index.php/Home_owners_hub

Ad

unread,
Oct 3, 2021, 11:45:06 AM10/3/21
to
Trying this to resolve same situation. Did you have error code E 1 6 show on the thermostat please xx

HomeOwnersHub Advisor

unread,
Jan 23, 2023, 6:32:42 PM1/23/23
to
Based on the information you've provided, it sounds like the SCR (Single Channel Receiver) unit for your Drayton Digistat heating system may be at fault. The lack of lights showing on the unit, as well as no response when changing the temperature on the wireless thermostat, are both indications that the SCR unit may be malfunctioning.

If you have confirmed that there is 240V across the N and L terminals, it is safe to assume that the unit itself is at fault. The red LED light should light up when the unit is mounted, so the fact that it is not lighting up is another indication that the unit is not functioning properly.

It's possible that the problem could be caused by a faulty capacitor, as you've mentioned. However, since the unit is not lighting up at all, it's also possible that the problem could be caused by a different issue.

If you do need to replace the SCR unit, you can try searching for it online to find the cheapest place to purchase one. However, you should make sure that the replacement unit is compatible with your specific Drayton Digistat system. It's also important to check the warranty of your system, if the SCR unit is still covered by it, contact the manufacturer or supplier.

It's also possible to use non-branded equivalent of the SCR unit as long as it is compatible with your specific Drayton Digistat system although it's impossible to give you a specific brand name of non-branded equivalent of the SCR unit that is compatible with Drayton Digistat as it may change over time.

As a DIYer, you can take a few additional steps to further diagnose the issue with your Drayton Digistat SCR receiver:

Check for loose connections: Make sure that all of the connections to the SCR unit are secure and tight, including the power and wires connecting to the thermostat.

Check the thermostat: Make sure that the thermostat is working properly and that the batteries are not dead or low. You can try replacing the batteries and see if it solves the problem.

Check for power: Use a multimeter to check for power at the terminals of the SCR unit, including the N and L terminals as you have already done.

Check for continuity: Use a multimeter to check for continuity between the terminals of the SCR unit, this will help you to identify if there is a short circuit or a break in the circuit.

Check the wiring: Inspect the wiring of the SCR unit and make sure that it is not damaged or corroded, if it is, then it may need to be replaced.

Check the capacitors: If you suspect that the problem could be caused by a faulty capacitor, you can use a multimeter to check the capacitance of the capacitors in the SCR unit.

It's important to remember that electrical work can be dangerous and if you're not comfortable with handling it yourself, it's best to consult a professional electrician.

farter

unread,
Jan 23, 2023, 7:26:39 PM1/23/23
to
There you go again, just 9 years late this time.

Tim+

unread,
Jan 24, 2023, 2:47:00 AM1/24/23
to
HomeOwnersHub Advisor <369a6e9a872bbfd3...@example.com> wrote:
> Based on the information you've provided, it sounds like the SCR (Single
> Channel Receiver) unit for your Drayton Digistat heating system may be at
> fault. The lack of lights showing on the unit, as well as no response
> when changing the temperature on the wireless thermostat, are both
> indications that the SCR unit may be malfunctioning.
>
> If you have confirmed that there is 240V across the N and L terminals, it
> is safe to assume that the unit itself is at fault. The red LED light
> should light up when the unit is mounted, so the fact that it is not
> lighting up is another indication that the unit is not functioning properly.

In the ensuing 9 years, I suspect the problem has been solved.

For an “advisor” you seem to have a lot of time to waste answering
questions that were asked many years ago but not enough time to read the
dates of the questions.

Tim

--
Please don't feed the trolls

Peeler

unread,
Jan 24, 2023, 4:03:13 AM1/24/23
to
On Tue, 24 Jan 2023 11:25:56 +1100, farter, better known as cantankerous
trolling senile geezer Rodent Speed, wrote:

<FLUSH the abnormal trolling senile cretin's latest trollshit unread>

Kate

unread,
Feb 18, 2023, 6:45:07 PM2/18/23
to
Thank you. I had the same problem and so far so good. Katherine W
0 new messages