We are recently facing a malfunction in our robot KUKA KR 360L280 with KRC2 controller. After working for 5 hours approximately, the robot suddenly stopped stating 'motor temperature A4'.
We monitored the variable TempA4 it was fluctuating between 390 and 410 Kelvin. We sensed motor 4 with our hands, it was like 290 Kelvin because if it was actually 390 Kelvin, we wouldn't be able to touch the motor.
Also, we tried to switch the cables between A4 and A5 then played a program for a full day...nothing happened and all the motors temperatures were normal.
My question is, what do you think can cause such problem? can the temp sensor in the motor be replaced? or do you prefer to change the cable? or drive?
Thanks in advance,