Delta VFD9A0MS43ANSHA User Manual

Chapter 17 Safe Torque Off FunctionMS300 (High Speed Model)
17-10
17-7-2 Troubleshooting Instructions
Refer to the following instructions for troubleshooting when STO / STL1 / STL2 / STL3 shows on keypad.
(Refer to Chapter 14 Error Codes)
ID No.
KPMS-LE01
Keypad displays
Descriptions
72
S1~DCM internal loop detected error
Corrective Actions

Check wiring of S1 terminal.
 Reset emergency switch (ON: activated) and re-power
 Check the input voltage to maintain at least 11V.
 Check the wiring of S1 and +24V terminal.
 After make sure all the wiring is correct, if STL1 fault still exists after
re-power, please contact Delta.
76
Safe torque off function active
Corrective Actions

Check wiring of S1 and S2 terminal.
 Reset emergency switch (ON: activated) and re-power.
 Check the input voltage to maintain at least 11V.
 Check the wiring of S1/S2 and +24V terminal.
 After make sure all the wiring is correct, if STO fault still exists after
re-power, please contact Delta.
77
S2~DCM internal loop detected error.
Corrective Actions

Check wiring of S2 terminal.
 Reset emergency switch (ON: activated) and re-power.
 Check the input voltage to maintain at least 11V.
 Check the wiring of S2 and +24V terminal.
 After make sure all the wiring is correct, if STL2 fault still exists after
re-power, please contact Delta.
78
Internal loop detected error.
Corrective Actions

After make sure the wiring is correct, if STL3 fault still exists after
re-power, please contact Delta.

Delta VFD9A0MS43ANSHA Specifications

General

Brand	Delta
Model	VFD9A0MS43ANSHA
Category	Controller
Language	English