TL230 Series 2 float diagnosis

[Coyote556]

I am working on a TL230 Series 2 float issue. I have tested the button at the right joystick and it is functioning correctly, but I get no current at the float solenoid plug over the control valve. I have a wiring diagram, but I am having difficulty figuring out which wire from the controller would feed the float solenoid so I can make sure I do not have a bad wire somewhere. Does anyone have any suggestions on tracking this down? Thanks

 

[skata]

Have you checked the relay to see if it functions.

 

[Coyote556]

I didn’t see a relay in the float circuit on the wiring diagram but I could have missed it.

 

[skata]

Well I don't have a tl230 manual but on a tl140 there is a relay for float. Check that the relay is clicking on. Could be bad solder joint on there. Fairy common.

 

[Coyote556]

Ok, I have gotten this far, I have 12v coming in from the grip when I push the float button to pin x27 on the controller. I do not have 12v coming out of pin Y06 on the controller going to the float solenoid. The problem I have is the service manual does not say what parameters are required for the controller to send the 12v to the float solenoid. I don’t know if it’s checking a pressure sensor first or anything. I have checked the pin coming right out of the controller that goes to the wire feeding the solenoid and there is no voltage there if I push the float button or not. I know there has to be some parameters in the controller because the wiring diagram shows the controller is what lights the float light on the console also.

 

[skata]

Are you checking for voltage with the lap bar down and door closed ?

 

[heymccall]

Are you activating float correctly?

 

[Coyote556]

I did the testing with the seat bar down and I’ve also tested it out on the ground as shown in the manual. I just wonder if there’s some logic built into the controller that requires a signal from the up and down pressure sensors before it will send the 12 V to the float solenoid. I wish the service manual actually showed what signals were required before it sent 12v to the float solenoid. That would really help with the diagnosis.

 

[skata]

I'm pretty sure just the seat bar needs to be down. That's it.
Where are you measuring voltage?

 

[Coyote556]

I have 12v coming into the controller at x27 when I push the float button. I have no voltage coming out of the controller at Y06. I checked it right at the controller. I have also checked the wire between y06 and the float solenoid and the wire is good.

 

[skata]

Did you check voltage at y06 with the solenoid unplugged? If it's shorted, it could show 0 volts.

 

[Coyote556]

Yes, it was unplugged when I checked at y06

 

[skata]

I can't tell from the drawings but is it a 24v or 0v output?

 

[Coyote556]

The output on y06 is nothing right now. I do not know if it is supposed to be 12 or 24v

 

[skata]

The output on y06 is nothing right now. I do not know if it is supposed to be 12 or 24v

Ok. My cnc wiring days were coming to mind. I should have said negative output. Or is there a power input for the float to the control?

 

[heymccall]

Any chance you could share the whole schematic?

 

[Coyote556]

Sure. Here it is. I need all the help I can get. This is driving me crazy.

 

[skata]

Have you checked all your fuses? A few of the fuses feed into the controller.

 

[Coyote556]

Yes. All fuses are good

 

[skata]

I'd probably look at those arm pressure switches. Though I don't know how to check them. Make sure they're connected, no corrosion.