For zirconia frameworks, the manual allows you to program a long, slow cool (segment 4 or 5). Set rate to 10 °C/min down to 500°C to prevent framework cracking. This reduces residual stresses by 70%.

One of the manual’s most valuable assets is its error code table. Examples include:

The manual is brutally practical:

If the display suddenly shows German ("Programm" instead of "Program"), turn the furnace off. Hold Start + Stop while powering on. Select "ENG" via arrow keys. This is a soft reset that does not erase your custom programs.


The back of the Programat P90 manual is usually reserved for the Error Code List. Here are the most common ones:

  • "Sensor Break" / Temp Error:
  • "Muffle Open" (when closed):

  • The heart of the manual is the instructions on Program Creation. The P90 allows you to set complex cycles including: