Rockwell Automation GV3000/SE AC Bookshelf Drive Hardware Ref, Installation, and Troubleshooting - Manual (Page 75)

Troubleshooting the Drive 10-5
Important: The cover is connected to the drive by the keypad/display cable. To
disconnect the cover, use the following procedure. Do not remove the
keypad/display.
To remove the cover:
a. Unscrew the attaching screw on the cover.
b. Lift the cover and carefully take it out of the heatsink as far as the flat
ribbon cable, which connects the display with the Regulator board, allows.
c. Use a screwdriver toslide the cable out of the connector on the Regulator
board to completely detach the cover.
Step 4. Use a voltmeter to verify that there is no voltage at the drive’s input power
terminals.
Step 5. Check the DC bus potential with a voltmeter as described in section 9.3 to
ensure that the DC bus capacitors are discharged.
Step 6. Disconnect the motor from the drive.
Step 7. Check all AC line fuses.
Step 8. If a fuse is open, use a multimeter to check the input diodes and output
IGBTs. See table 10.1.
Note that Bookshelf drives do not have replaceable transistor modules. The
entire drive must be replaced if a transistor malfunctions.
Step 9. Reconnect the motor to the drive.
Step 10. 24 to 43 A drives only: Reattach the drive’s cover and front panel. Reconnect
all wiring to the face of the drive.
Step 11. Reapply input power.
Table 10.1 – Resistance Checks
Input
Diode
No.
Meter
Connection
(+) (-)
Component is OK if
resistance (R) is: Component is defective if:
1 47* 1L1(R) 0.3 < R < 8K ohm Continuity (short circuit) or
open when the meter is
connected with reversed
polarity
2 47* 1L2(S)
3 47* 1L3(T)
4 1L1(R) 45*
5 1L2(S) 45*
6 1L3(T) 45*
*If the optional terminals 45 and 47 are not fitted (e.g., on drives with built-in chopper option), remove
cover and connect the meter to the measuring points according to the procedure in section 10.3.