Rockwell Automation Liqui-Flo V2.0 AC Drive User Manual
Page 230
230
Rockwell Automation Publication D2-3518-3 - May 2013
Chapter 10
4.
Disconnect the motor from the drive.
5.
Check all AC line and DC bus fuses.
6.
If a fuse is open, use a multimeter to check the input diodes and output
IGBTs. See
.
7.
Reconnect the motor to the drive.
8.
Reapply input power.
Table 35 - Input Diode Components
* (+) DC Bus Volts power terminal
** (-) DC Bus Volts power terminal
Table 36 - Output IGBT Components
* (+) DC Bus Volts power terminal
** (-) DC Bus Volts power terminal
Input Diode
No.
Meter Connection
Component is OK if
resistance (R) is:
Component is defective if:
(+)
(–)
1
*
L1
10 < R < 1 megohm
Continuity (short circuit) or open
when the meter is connected
with reversed polarity.
2
*
L2
3
*
L3
4
*
L4
5
*
L5
6
*
L6
7
L1
**
8
L2
**
9
L3
**
10
L4
**
11
L5
**
12
L6
**
Output IBGT
No.
Meter Connection
Component is OK if
resistance (R) is:
Component is defective if:
(+)
(–)
1
*
W/T3
10 < R < 1 megohm
Continuity (short circuit) or open
when the meter is connected
with reversed polarity.
2
*
V/T2
3
*
U/T1
4
W/T3
**
5
V/T2
**
6
U/T1
**