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POWER FLEX 753 ALLEN- BRADLY :-

This video is about to solve the problem in allen-bradly power flex 753 VFD.
VFD showing heat sink over temp fault. 
  • To see vfd temp in power flex 753 go to the parameter no 943-942
  • This parameters shows the temperature of vfd and IGBT respectively.
DRIVE TEMP PCT is fault 943 which shows the indication operating temperature of the drive power section(heat-sink) in percentage of minimum heat-sink temperature.

 Sollution:-

To solve this problem first check the cooling fan of vfd is working or not. 

 One of the cooling fan is exactly under the sensor. if the fan is failed . then the sensor may sense the temperature and trip the vfd. and shows that vfd is over -heated .

 Some case if you change the fan which is under the sensor then the sensor will not get heated and will work propely.


if this cant help then there will some sensor problem. for that contact allen-bradly

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