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Chapter 7 Maintenance and Troubleshooting
JT550 Series Inverter Manua
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9
Err17 Alert
Soft-starter does not pull in;
Check if there are the loose
wires on the contactor;
Check if the contactor
malfunctions;
Check if 24V power supply can
normally power the contactor;
Contact tech support.
10
Display
“8.8.8.8.8.”
Damaged parts on the control
board;
Change the control board.