Skip to main content
Rank 6
August 22, 2020
Solved

Aclara SMETS2 smart meter communication hub lights - what do the flashing sequences indicate?

  • August 22, 2020
  • 111 replies
  • 24880 views

Hi. I used to have a problem with my IHD not correctly monitoring my gas and electricity usage but over the last 2 months, this problem is sorted apart from my gas daily standing charge not being displayed.

This charge still gets paid even though it isn't being shown !

I am starting this topic as the communication hub indicator lights have changed their sequencing.

What used to happen was the SW, WAN, HAN and GAS indicator lights used to simultaneously flash once then go out for 4 or 5 seconds and then the sequence would repeat.

However I have noticed this morning that this has changed with the WAN light flashing 7 times then the remaining SW, HAN and GAS lights flashing once then flashing once more once the 7 WAN flashes have completed.

Anyone else get this ?

Cheers

Best answer by Jequinlan

Updated on 03/11/25 by Ben_OVO

 

 

 

What do the indicators mean on a SMETS2 Comms Hub?

 

On the front of a comms hub there are a series of LED indicators showing the functional status of the metering system. Each LED has a legend as shown below:

 

SW - Software

This shows the status of the hub’s software.

WAN - Wide Area Network

Shows your communication hub’s ability to communicate with your supplier. This light will be off if your meter is using the MESH network to communicate.

MESH - Mesh Communications Network

If you have a SK2 or SKU3 type of Communications Hub, then both WAN and MESH are active, and will display the slow-flash from these indicators if all is well.

If you have a SKU1 (85% of houses do), then the MESH indicator will always be off because that section of electronics isn’t present.

HAN - Home Area Network

This light shows the connection status of your electricity meter, gas meter and IHD with your communications hub on the HAN (Home Area Network).

GAS - Gas Meter

This light tells you if a gas meter is connected. If you don’t have a gas meter installed this light will be off.

 

 

How fast should the lights flash?

 

The frequency of flashing relates to the status of the function as follows:

  - Power Up

To allow the operator to see that all LEDs are working they are shown without flashing for a short period after power up.

  - Error

Fast flash rate of 2 flashes per second means that there is an error. Call your supplier if this does not change after 48 hours.

  - Transient

A flash rate of 1 flash per second means that the process is in a transient state such as making a communications connection.

  - Normal

A slow flash rate of 1 flash per 5 seconds means that the process is in its normal state.

  - Off

The communications hub is powered down.

 

We’d expect the lights to flash  of every 5 seconds which indicates the meter is communicating normally.

In your case it’s the WAN light which is flashing more frequently than usual which could mean we’re having difficulty communicating with your meter. You can check whether this is the case on the ‘Meter Readings’ page of your online account or OVO app (download for Android or iOS). If we haven’t been receiving your readings recently we’d advise carrying out a smart meter health check and contacting our Support Team with the results.

 

 

 

OVO customer but not got a smart meter yet? - Book today!

Interested but not yet an OVO customer? - Check out our plans!

111 replies

Transparent
Rank 20
Rank 20
September 4, 2020

We’ve been discussing CV data elsewhere on the Forum.

Six months back we were looking at how this affects the accuracy of Bills.

And before that I showed how CV gets calculated within the kWh readings used on our bills.

Bio-gas is a good way of using energy from our food waste. But it still produces CO2 when burned in our homes. A bio-digester must add Propane to the mix, to ensure the CV is above 37MJ/Kg before it can be introduced to the main.

There are proposals to use Hydrogen. But on its own that has a CV of just 12MJ/Kg.

Worcester-Bosch are manufacturing “Hydrogen-ready” boilers in anticipation of this event occurring.

Save energy... recycle electrons!
Newcomer
September 5, 2020

OK thanks for the explanation.

Guess we will have to wait until an OVO engineer can look into the problem.

MikeEAuthor
Rank 6
September 9, 2020

"Thanks for taking the time to contact us, and for completing the smart meter health check. I have raised this with the smart team to investigate, and they will be in touch with in the next 10 working days so on or before the 11th September with the next steps."

 

I am hoping that OVO reset my WAN connection when 11th September arrives !

I have almost given up with smart meters (it's a pity they weren't as reliable as smartphones) and if nothing is done, I have decided to just give monthly meter readings like I used to do before.

It's just that I had problems when I was with ScottishPower on a SMETS1 meter.

I thought that with a SMETS2 meter, my problems would be sorted but the problem is just as bad !

Tim_OVO
OVO Staff
OVO Forum Legend
September 10, 2020

"Thanks for taking the time to contact us, and for completing the smart meter health check. I have raised this with the smart team to investigate, and they will be in touch with in the next 10 working days so on or before the 11th September with the next steps."

 

This will be the S2 team that I mentioned. They’re best placed to try some back end fixes. HOWEVER, I can’t find my comment outlining that I had it passed onto them. I’m very confused. When looking at your activity history, @MikeE it also doesn’t seem to be working correctly. With every comment you made on this topic showing as 18 hours ago. I have raised this with Insided, the platform provider. 

 

I have almost given up with smart meters (it's a pity they weren't as reliable as smartphones) and if nothing is done, I have decided to just give monthly meter readings like I used to do before.

 

I am glad you included the word *almost* - I can understand if you have battle fatigue with these issues. But your contributions here, when combined with the work of our S2 team, will help us work out what is the cause of this, and the best fix. 

 

Let’s see what happens this week…..

 

 

Carbon neutral - we need a community to get there! My green tech: Aclara SGM 1411-B smart meter, Chameleon IHD6
MikeEAuthor
Rank 6
September 10, 2020

@Tim_OVO I just let off a bit of steam lol

 

I don't mind giving monthly meter readings if my smart meters just won't work as it's no problem now as I got rid of the box that my gas meter was in to try and help with my HAN signal.

 

Before I had to take the lid off and move my router when I wanted to take a meter reading.

 

I have moved my router a few feet so I don't have that problem anymore.

 

Fingers crossed that it will work again if not no worries it is what it is !

 

It's not the end of the World :)

 

Transparent
Rank 20
Rank 20
September 10, 2020

Router?

What router?

Are we talking about an internet/WiFi connection?

Save energy... recycle electrons!
MikeEAuthor
Rank 6
September 10, 2020

@Tim_OVO Your comment is still in this thread at the top of this page in fact !

 

"Thanks both, @MikeE I’ve passed these two questions onto our smart ‘subject matter expert’. I’ll post back here when I get a reply. "

MikeEAuthor
Rank 6
September 10, 2020

@Transparent Sorry for not explaining myself !

 

I wanted to switch to a smart meter system because I used to have to move my Sky router which was on top of the cupboard lid that enclosed my gas meter.

 

I am not that bothered about taking monthly meter readings now that I have got rid of the cupboard (including lid) and moved my Sky router a few feet from where the meter is situated as I suspect having my Sky router so close to my gas smart meter wasn't a good idea ?!

 

Yes I was talking about an internet/WiFi connection and nothing to do with my smart meter problem.

Transparent
Rank 20
Rank 20
September 11, 2020

Ah… that was tricky for me to understand. My intuition took me along the path of assuming we were discussing some radio-wave interference between the router and the Comms Hub.

It didn’t occur to me that the router was sat on top of the old meter cupboard!

There’s a Westcountry tale with a similar twist:

A hiker was walking down a country road when he looked over a 5-bar gate. He was pleasantly surprised to see a farmer sitting on a 3-legged stool, milking a cow by hand.

“Good afternoon,” hailed the hiker.

“A’ernoon!” grunted the farmer.

“I wonder,” continued the hiker, “if you happened to know what time it is?”

“Aye,” said the farmer, placing his hand beneath the cow’s udder and raising it. “It be a quarter t’ four.”

“That’s amazing,” the hiker exclaimed. “You can tell the time by weighing up how much milk is still in the udder!”

“If ee say zo,” remarked the farmer. “But I fin’ it better t’ see yon church clock if I lifts t’udder out t’ way firz!”

Save energy... recycle electrons!
MikeEAuthor
Rank 6
September 11, 2020

Well my problem still hasn't been resolved. The WAN light is still flashing 7 times in high frequency mode indicating that the link has been broken and I haven't had a reply since sending the smart meter health check and the 10 working day deadline has now passed.

From now on I will just give OVO monthly meter readings on the last day of each month and they will have to go by my meter readings unless they still send out meter readers who report back to OVO with the actual meter readings ?!

I think that meter readings have now stopped to save money and what's the point in having them with the rollout of smart meters (when they work!)