Issue:

Enclosed VFD will not run when run command is given

Product line:
Enclosed ATV61 ATV71 ATV58 ATV312

Environment:
0 -100 horsepower 460 volts, 0-50 horsepower 208/240 volts

Cause:
The VFD will not run when given a run command is activated?

Resolution:
Troubleshooting Enclosed VFD with HOA, Test/Normal and AFC/OFF/BYPASS switch. Terminal 24 is the neutral for the 120 V supply.

1).   Is the RCR relay energized with the HOA switch in the Hand position? NO

a). Voltage should be present on Terminal 6 (Verify there is a jumper between 6A and 6, or does the EFLEX have a start stop push button, press the start button)

b). Verify voltage on terminal 6A (Verify HOA is in HAND position and voltage is present on both sides of the normally open contact of the HAND side of the HOA, wire H13 and H14)

c). Verify voltage on terminal 1 (Verify the jumper between terminals 2 and 1 is secure, if the has been remove, verify the circuit wired between the terminals 2 and 1 is closed)

d). Verify voltage on terminal 2 (No voltage on terminal 2 verify Fuse (FU1) on the secondary side to the transformer is not blown.

e). If the fuse (FU1) is not blown, verify voltage on the primary and secondary side to the transformer (verify fuses FU2 and FU3 are not blown and then check the power supply to the cabinet.)

2)   Is the RCR relay energized with the HOA switch in the Auto position? NO

a). Voltage should be present on Terminal 6 (There is an external auto start contact on terminals 6 and 7 supplied by the end user and verify the contact is closed)

b). Verify voltage on terminal 7 (Verify HOA is in AUTO position and voltage is present on both sides of the normally open contact of the AUTO side of the HOA, wire A13 and A14)

c). Verify voltage on terminal 1 (Verify the jumper between terminals 2 and 1 is secure, if the has been remove, verify the circuit wired between the terminals 2 and 1 is closed)

d). Verify voltage on terminal 2 (No voltage on terminal 2 verify Fuse (FU1) on the secondary side to the transformer is not blown.

e). If the fuse (FU1) is not blown, verify voltage on the primary and secondary side to the transformer (verify fuses FU2 and FU3 are not blown and then check the power supply to the cabinet.)