Rockwell Automation GV3000/SE AC Drive 1-20HP, 230VAC Ver. 6.04 Hdwe Ref, Install, Troubleshooting - Manual (Page 73)

9-3
Troubleshooting the Drive
Input
Diode
No.
1
2
3
4
5
6
Component is OK if
resistance (R) is:
50 K < R < 10 Megohms
Component is defective if:
Continuity (short circuit) or
open when the meter is
connected with reversed
polarity
* (+) DC Bus Volts power terminal
** (–) DC Bus Volts power terminal
Step 7. If a fuse is open, use a multimeter to check the input diodes and output
IGBTs. See table 9.1.
Note that the drives do not have replaceable transistor modules: the entire
drive must be replaced if a transistor malfunctions.
Step 8. Reconnect the motor to the drive.
Step 9. Reattach the drive's cover.
Step 10. Reapply input power.
Table 9.1 – Resistance Checks
Meter
Connection
(+) (–)
* R/L1
* S/L2
* T/L3
R/L1 **
S/L2 **
T/L3 **
IGBT
No.
1
2
3
4
5
6
Component is OK if
resistance (R) is:
50 K < R < 10 Megohms
Component is defective if:
Continuity (short circuit) or
open when the meter is
connected with reversed
polarity
* (+) DC Bus Volts power terminal
** (–) DC Bus Volts power terminal
Meter
Connection
(+) (–)
* W/T3
* V/T2
* U/T1
W/T3 **
V/T2 **
U/T1 **