A common issue that we hear is that the hot melt pump on a unit has stopped working. You may immediately think you need to repair it or even make the costly replacement. Seems simple enough, right?
CGM knows that making some adjustments and fine tuning the machine may be enough to improve the pump performance. We put together a list of potential reasons your gear pump is not working and how to troubleshoot for a potential fix.
PUMP IS NOT OPERATING:
Motor on/off switch is off on control panel:
Check motor on/off switch
Temperature is below threshold of set points:
Pump will not turn on until all set points have reached temperature. Check temperature set points and adjust temperature if necessary. If the system was up to temperature and then dropped below the tolerance it will stop the pump and wait for temperature to come back within tolerance.
No incoming electrical power:
If the ASU is also not heating up, check the incoming supply voltage.
System is not ready:
Wait until temperature is not heating up, check the incoming supply voltage.
PUMP IS RUNNING BUT THERE IS NO ADHESIVE:
ASU is out of adhesive:
Add adhesive to hopper.
Motor leads have been reversed:
Check motor wiring to schematic.
PUMP IS RUNNING BUT THERE IS LIMITED ADHESIVE:
Filter(s) is clogged:
Check filter and replace if necessary.
Adhesive is too viscous:
Increase temperature. Check with adhesive provider to ensure current lot is within viscosity tolerance.
Eliminate fluid pressure, then discount fluid connection of hose and turn pump on. If adhesive flows from the manifold there is a clog in the hose or applicator.
Eliminate fluid pressure, then disconnect fluid connection of applicator and turn pump on. If adhesive flows from the hose, the applicator is clogged.
Click here to download a 1 page technical troubleshooting guide
Hopefully, these tips and tricks will help save you costly hot melt pump repairs or replacements. You can always contact us 24/7/365 if you have any additional questions or concerns.