The Machine Beeps Continuously

Problem description:

You can hear a beep continuously that comes from the indicates light, even if the machine is rebooted. It will sound like this:

If the sensor tripped from a legitimate heat event, then it will need time to cool down to clear the output signal. The machine requires a power cycle to clear the TL Timer fault

And will be coming from the stack light:

Reasons:

1. Temperature sensing probe is bent

The heat alarm sensor board is installed in the middle under the X-axis rail for single sensor installs. For larger machines (Gantry over 40" there are generally 2 heat sensors, one on each side of center)

Check it clearly, you can see a black probe on the board.

Check for damage to the heat shrink on the heat sensor legs:

Solution:

If the black probe is bent, please make it's straight.

2. The smart board with temp sensor or TL-Timer board is faulty or needs adjustment

If the red light of smart board is on and the probe is straight. Maybe the smart board or TL-Timer board  is faulty. Location of the RED led will vary based on the board version.

Check the adjustment:

You will need the and multimeter set to measure DC voltage. Adjust the brass screw on the blue trim pot with a small flathead (like eyeglass repair kit size) . Will be looking for 1.138V with the meter leads on the GND to VREF test points.

Stock setting is 55C (131F)

As you adjust, check for this red light to go off:

If the trim pot adjustment did not correct the issue, try this troubleshooting solution:

Unplug IN2 (If applicable, only on newer Nova  51 and Nova 63) and  IN6 connectors of TL-Timer board, if the beep stops, the problem is smart Heat Sensor board or the wire harness. If not, the problem is TL-Timer board. Please contact us:[email protected]

If the beep continues, check the status of the LED for Out 6 On the TL timer:

      If the LED that is marked in the image below is on or there is 24v on the Out 6 terminals (measure with the connector with wires 24V10 and 0V10 unplugged) then the TL Timer is likely the issue and needs to be replace.

Replacement Parts: