I didn't but I actually bought a flood light the other day.

Lamp Wattage?
Max.

 

120w

 

That should be OK.
You could also carefully check the voltage across the lamp when the power is applied to see if you notice any ramp up.
Max.

 

That should be OK.
You could also carefully check the voltage across the lamp when the power is applied to see if you notice any ramp up.
Max.

Great idea thanks max, I'll try that in a while and report back. Thanks for your help by the way, it's very kind of you.

 

That should be OK.
You could also carefully check the voltage across the lamp when the power is applied to see if you notice any ramp up.
Max.

Hey Max just tried it and it blew bulb straight away, no ring or anything seems like a surge of power when start is hit

Edit: it didn't blow the actual bulb, it power it very bright then it died. Stayed illuminated for about a second. But bulb is still good and treadmill doesn't blow fuse

 

So what could be happening is that you are getting full voltage with no ramp up, the Processor detected over current and shut down, the load of the lamp was not enough to blow the fuse.
This would be my guess.
Points to the Mosfet as a possibility.
Actually i see it is a IGBT, not a Mosfet as usually fitted.
Might pay to remove it from circuit and test for short circuit, test on resistance range, not the diode range.
Max.

 

So what could be happening is that you are getting full voltage with no ramp up, the Processor detected over current and shut down, the load of the lamp was not enough to blow the fuse.
This would be my guess.
Points to the Mosfet as a possibility.
Actually i see it is a IGBT, not a Mosfet as usually fitted.
Might pay to remove it from circuit and test for short circuit, test on resistance range, not the diode range.
Max.

Shall I replace the Mosfet altogether? Only a few bucks. What mosfet should I get?

 

If in doubt, I would replace it, it is a IGBT not a Mosfet, BTW.
Where are you located? I use Digikey if they have stock.
The full part No is IRG4PC40KDE206P

Max.

 

If in doubt, I would replace it, it is a IGBT not a Mosfet, BTW.
Where are you located? I use Digikey if they have stock.
The full part No is IRG4PC40KDE206P

Max.

Ah ok I got ya, I live in Ireland, checked Digikey Ireland website with the part number but says no stock obslete Item. Would I be able to grab one off eBay?

 

You could try ebay or use a sub such as HGTG30N60A4
Max.

 

You could try ebay or use a sub such as HGTG30N60A4
Max.

Awesome thanks man i got the sub one

here's what i got:
https://ie.rs-online.com/web/p/igbt...AV65p47jolMua5eMR-X5a9XsiTFWQluzshg6JulwTF8pc

 

But RS also had the original??
Max.

 

But RS also had the original??
Max.

No they didnt have it, non stock it said so the sub will be fine anyway no? The place i got it from is based in dublin so post will be fast too

 

I just realized something, that if the fuse does not blow until the start is hit and not right away at switch on, it could possibly be the SCR, the smaller device on the H.S.
This ramps up the power slowly when a start is issued.
Max.

 

I just realized something, that if the fuse does not blow until the start is hit and not right away at switch on, it could possibly be the SCR, the smaller device on the H.S.
This ramps up the power slowly when a start is issued.
Max.

Hmm good thinking, it only blows when a motor is connected. However the lamp test it did not get gradually brighter. Just a large flash then nothing but no fuse blown.

Side note I did realise that when I engaged the actuator with the lamp attached at the end of the actuator stopping it made the lamp flash again. Seems like a surge just like at start up then dies but only does it with the motor connectors as the actuator works perfectly

The scr is on the heat sink?

also the LED on the board gives two blinks then a pause then two blinks in repeat when the start is pressed. ( no motor connected)

 

I just realized something, that if the fuse does not blow until the start is hit and not right away at switch on, it could possibly be the SCR, the smaller device on the H.S.
This ramps up the power slowly when a start is issued.
Max.

In addition to the above when the board is powered I notice a high pitch whine I believe it's from this. The yellow device.

 

That transformer appears to be the low voltage transformer for the 12v-15vdc you can measure this on pins 1 & 2 of HD2.
If the fuse only blows when you initiate a start then it could be the SCR circuit, the small device next to the large bridge rect. on the heat sink.
If it blow at power up before a start, then it points to the IGBT.
You may be getting the 2 blinks as the controller is not seeing the belt signal when testing with a lamp.
Max.

 

That transformer appears to be the low voltage transformer for the 12v-15vdc you can measure this on pins 1 & 2 of HD2.
If the fuse only blows when you initiate a start then it could be the SCR circuit, the small device next to the large bridge rect. on the heat sink.
If it blow at power up before a start, then it points to the IGBT.
You may be getting the 2 blinks as the controller is not seeing the belt signal when testing with a lamp.
Max.

Yeah it's baffling only blows when motor is connected and it won't keep the lamp illuminated

 

But still not clear, blows at power up? or only when command issued?
Max.

 

But still not clear, blows at power up? or only when command issued?
Max.

Does Not blow at power up.

DOES Not blow at start command with lamp test just doesn't keep the lamp illuminated.

Doesn't Not blow when start command issued no motor attached.

DOES blow when start command is issued with Motor Attached.

MOTOR is fine. Used a brand new motor and same thing happens. Still blows.