Vent Axia PIR Sensor not working

[Mike2007]

I have a Vent Axia PIR sensor and it won't work properly?
http://www.vent-axia.com/files/imagecache/productPageBigPic/VACAS-PIR.jpg

The relay closes in the sensor but only lets out around 12vac on the closed output terminal? Where have my 240 volts gone to power my wall fan??
Can't be volt drop as it not any distance away.

 

[riveralt]

I have a Vent Axia PIR sensor and it won't work properly?
http://www.vent-axia.com/files/imagecache/productPageBigPic/VACAS-PIR.jpg

The relay closes in the sensor but only lets out around 12vac on the closed output terminal? Where have my 240 volts gone to power my wall fan??
Can't be volt drop as it not any distance away.

Out of interest where are you taking your measurements from?
If it is broken and its less than 2 years old - and you followed the manufacturers instructions you can get it replaced free of charge.

 

[Mike2007]

I thought any movement would trigger the sensor. But 12v output would mean its closed inside. checked tightness of screws and seem fine :-/

 

[bernardgreen]

Did this work and has gone wrong ? Or has it never worked ?

 

[Mike2007]

Did this work and has gone wrong ? Or has it never worked ?

Its not worked at all

 

[riveralt]

It is puzzling why, if the sensor has never worked and it has been wired correctly, you haven't taken it back and got it replaced.

Nevertheless two questions (1 repeated):

Have you tried to bypass the sensor?
I'm pretty certain there will be an override switch - normally quickly turning the switch off and on.
How and where did you measure the 12vac?

 

[ban-all-sheds]

It is puzzling why, if the sensor has never worked and it has been wired correctly, you haven't taken it back and got it replaced.

My guess is that it hasn't been....

Where have my 240 volts gone to power my wall fan??

That PIR has volt-free contacts - are you supplying 240V to one of them (i.e. to the contacts, not to the PIR electronics) so that when they close the fan gets its supply?

 

[Mike2007]

It is puzzling why, if the sensor has never worked and it has been wired correctly, you haven't taken it back and got it replaced.

Nevertheless two questions (1 repeated):

Have you tried to bypass the sensor?
I'm pretty certain there will be an override switch - normally quickly turning the switch off and on.
How and where did you measure the 12vac?

I am getting nothing out on NO or NC terminals (4 & 5). Or not enough to power the fan

 

[riveralt]

This is hard work!

1. How have you tested the device to get 12vac? - talk me through it.

2. Is the PIR linked to a lamp as well as the fan? - if so it should not be a low energy or fluorescent lamp but a tungsten filament lamp.

3. Is the timer set for maximum?

4. What is the model number of your PIR?

 

[Mike2007]

This is hard work!

1. How have you tested the device to get 12vac? - talk me through it. ........Neutral to Terminal 4 and 5

2. Is the PIR linked to a lamp as well as the fan? - if so it should not be a low energy or fluorescent lamp but a tungsten filament lamp...........No Lamp

3. Is the timer set for maximum? .........No it isn't

4. What is the model number of your PIR?......VISIONEX 459623A

[/b]

 

[riveralt]

This is hard work!

1. How have you tested the device to get 12vac? - talk me through it. ........Neutral to Terminal 4 and 5

2. Is the PIR linked to a lamp as well as the fan? - if so it should not be a low energy or fluorescent lamp but a tungsten filament lamp...........No Lamp

3. Is the timer set for maximum? .........No it isn't

4. What is the model number of your PIR?......VISIONEX 459623A

[/b]

Set the timer to max - check you wiring is as per the instructions - re-energise - check you have 230v coming in to the PIR L & N terminals.
If you still get the same results coming out - its probably broken - take it back.

Just checked the instructions - have you got a link between L and 3?

 

[Mike2007]

This is hard work!

1. How have you tested the device to get 12vac? - talk me through it. ........Neutral to Terminal 4 and 5

2. Is the PIR linked to a lamp as well as the fan? - if so it should not be a low energy or fluorescent lamp but a tungsten filament lamp...........No Lamp

3. Is the timer set for maximum? .........No it isn't

4. What is the model number of your PIR?......VISIONEX 459623A

[/b]

Set the timer to max - check you wiring is as per the instructions - re-energise - check you have 230v coming in to the PIR L & N terminals.
If you still get the same results coming out - its probably broken - take it back.

Just checked the instructions - have you got a link between L and 3?

No there is no link, I thought that would be internal :-/ ??

 

[riveralt]

Just checked the instructions - have you got a link between L and 3?

No there is no link, I thought that would be internal :-/ ??

The diagram they supply in the manual would seem to indicate that the link is outside the device - same for the neutral.

 

[Mike2007]

WE HAVE LIFT OFF!!
Thanks for your help mate!

 

[ban-all-sheds]

What - you mean when you actually bother to read and follow the instructions it works?

You utter t**t.