WB 24i Junior fault

[mutley racers]

What do you use as in a little connector to be able to get your multimeter to read the voltages. I couldn't get my prongs in the connector on the end of the fan.

Any way, the fault I have is intermittent. The blue light flashes fast but with no lockout. It says in manual volatile fault. Check thermistor and 240 at fan. I couldn't get my prongs into read the voltage but I was getting 240 v at the fan point on the board. If you reset it, sometimes it runs ok for a few days and others you need to press the reset button about 10 times before it works. I believe the fan is the issue. Will pushing paper clips in be alright to get a reading at fan

 

[Dotty]

Didn't WB produce a wee test connector to go between the pcb and the plug?

 

[GasmanxxxR1]

ease the conector back a bit to get on the 'pins'

 

[GasmanxxxR1]

Didn't WB produce a wee test connector to go between the pcb and the plug?

Yes, a credit card looking thing

 

[mutley racers]

I did ease it back but I still couldn't get my pins into it. The card thing only connects the bottom connector so doesn't tell me if the harness it fan has continuity

 

[GasmanxxxR1]

fit the other end onto the card and your testing the whole harness and fan

 

[GasmanxxxR1]

Maplin also do some tiny probe ends for your multimeter

 

[GrahamM]

The test card can be handy. Only give out on courses but can sometimes pick them up on fleebay.
PCB harness test - Worcester, Bosch Group UK installer site

Get set of these probes.
Multimeter Long Needle Point Insulated Test Probes Red: Amazon.co.uk: Electronics

 

[Kev the gas]

I think Mutley was talking about the 24 I not the Greenstar models which you can get the card for.

 

[AlexGas]

Here it is:

 

[mutley racers]

I have those cards, as kev the gas has said, does it do the junior boilers? Not much help with the fan as there is no fan connection. And it is a live test so wouldn't want to hold that card on a live test now

 

[mutley racers]

The test card can be handy. Only give out on courses but can sometimes pick them up on fleebay.
PCB harness test - Worcester, Bosch Group UK installer site

Get set of these probes.
Multimeter Long Needle Point Insulated Test Probes Red: Amazon.co.uk: Electronics

I think mine are roughly 4mm and I still couldn't push them in to connect for a reading

 

[mutley racers]

I have those cards, as kev the gas has said, does it do the junior boilers? Not much help with the fan as there is no fan connection. And it is a live test so wouldn't want to hold that card on a live test now

Actually I believe they do do them. When I did the cdi course and got the card, the guy said I didn't have to bother with the juniour course as all of it was pretty.much the same

 

[mutley racers]

I think Mutley was talking about the 24 I not the Greenstar models which you can get the card for.

I didn't realise there was 2 kinds of junior. It is the green star one

 

[arran197]

Ye, there's the standard efficiency jnr with a twin pass heat exchanger and then the Greenstar one that is much more common. Both terrible to work on imo.

 

[kris]

I bought one of those cards on ebay. I think it was a fiver as last course they'd none left but as of yet I haven't used it but a real handy bit of equipment to have.

 

[arran197]

I used mine yesterday to test the resistance on the gas valve coils. You can do it without the card, but it does make it easier. Bottom coil was shafted.