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What causes an Err 7 fault code in an ATV31 drive?
ATV31 , All models , All serial numbers
Possible cause of Err7 on the ATV31 remote display :
1). Baud rate not equal to 19.2 kb/sec - Set to 19.2 in the COn Menu parameter tbr
2). Format is not equal to 8bits even parity 1 stop bit (8E1) - Set to 8E1 in the COn Menu parameter tFO
3). Defective cabling or connection between the VFD and keypad - change the cabling
4). Defective keypad - replace the keypad
5). Shorted pins on the comport of the VFD - If no physical short on the pins in the comport then the issue is internal to VFD, replace VFD
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