Uhlmann U011: Uhlmann Uhlmann Blister Machine Error Code...

Symptoms

The packaging machine seal jaw temperature has dropped below the minimum required for the film type. The sealed packages fail the peel test.

Step 1: Measure the seal jaw temperature with an independent surface thermometer
Compare to the controller setpoint; if below, investigate the heater and sensor
Step 2: Check the heater cartridge resistance with a multimeter
Replace if open or more than 10% different from the rated resistance
Step 3: Verify the thermocouple connection and resistance
Replace if open or intermittent when the wire is flexed
Step 4: Inspect the Teflon tape on the seal jaw and replace if worn or burnt
Clean the jaw surface before applying new tape
Step 5: Check the air cylinder pressure and verify the seal jaw closes with adequate force
Adjust the pressure regulator if below specification

Reset: After heater or sensor replacement, recalibrate the temperature controller and verify seal quality with a peel test.

Heater cartridge: 240V, 250W, cartridge type (Match to seal jaw dimensions)
Thermocouple: Type J or K, exposed junction (Match to controller input type)
Teflon tape: PTFE, 0.08mm, adhesive-backed (Replace weekly in high-volume production)

Q: What temperature do I need for sealing?
For PE film: 140-180C. For PP film: 160-200C. For PET/PE laminate: 150-190C. Always check the film specification.
Q: How do I test seal quality?
Cut a 25mm strip from the seal, peel it apart in a tensile tester, and record the peel force. Minimum acceptable peel force: 3-5 N per 25mm for most applications.
Q: How often should I replace Teflon tape?
Daily in continuous production, or when visible wear or burning appears. Worn tape causes uneven heating and film sticking.