1) Warm-up time is too short when starting, speed increase too fast or loading too fast.

2) Cylinder mezzanine, heating steam temperature of flange heater is too low or low traffic, causing steam heating effect weak.

3) Poor performance of slide bearings or sliding pin system platen, easy Jamming.

4) The steam temperature of bearing seal is too high or the steam supply of the bearing seal too large, causing bearing neck excessive elongation

5) When the unit starts, inlet pressure, temperature, flow and other parameters too high.

6) the thrust bearing wear and axial displacement increases.

7) Poor insulation effect cylinder insulation or insulation off, in non-season, steam room temperature is too low or cold hallway.

8) Cold steam or cold water flow into the mezzanine of double cylinder.

9) differential expansion indicator zero denial not accurate or contact wear, causing digital bias.

10) Multi-rotor unit, differential expansion adjacent rotor change brought the impact of each other.

11) Effect of a vacuum change.

12) Effect of changes in speed.

13) Effect of extraction flow in each levels, if an extraction steam off, the effect is obvious height difference.

14) bearing oil temperature is too high.

15) The impact, "Poisson effect" due to the the unit shuts down run-down process.