text: <s>[INST] 1398-PDM Error 33 Summary: IAVG Error with motor detachedI have a customer out in the field that has the following setup 1398-PDM-150B Drive H-8500 Motor They receive an Error 33 IAVG fault with the motor detached from the machine. It appears they can cycle the motor for a short time period before it starts to fault (20 cycles or so). Duty cycle is about 1 stroke every 4 seconds. If they try to increase the speed it will fault out quicker. I have had them pull and check the encoder and power connections and make sure they are clean. The drive has 230 VAC feeding the drive and control. They have 350VDC in the DC bus. What else could I look at?? Thanks [/INST] Were they able to try a spare motor? If the trouble goes away with a different motor, I would suggest that the motor bearings were starting to fail. Did the motor have a brake on it? Even if they were not using the brake, the wear on the disc spinning in the housing can cause enough drag that might cause the motor to fault. \\n </s>