User Manual

Troubleshooting the Drive
9-9
Table 9.1 – Resistance Checks
1–60 HP Drives
Input
Diode
No.
Meter
Connection
(+) (-)
Component is OK if
resistance (R) is: Component is defective if:
1 * R/L1 50K < R < 10 Megohms Continuity (short circuit) or
open when the meter is
connected with reversed
polarity
2 * S/L2
3 * T/L3
4 R/L1 **
5 S/L2 **
6 T/L3 **
* (+) DC Bus Volts power terminal
** (-) DC Bus Volts power terminal
60–100 HP Drives
Input
Diode
No.
Meter
Connection
(+) (-)
Component is OK if
resistance (R) is: Component is defective if:
1 47 1L1 0.3 kohm < R < 8 kohm Continuity (short circuit) or
open when the meter is
connected with reversed
polarity
2 47 1L2
3 47 1L3
4 1L1 45
5 1L2 45
6 1L3 45
100–150 HP Drives
Input
Diode
No.
Meter
Connection
(+) (-)
Component is OK if
resistance (R) is: Component is defective if:
1 47 1L1 R > 100 kohm Continuity (short circuit)
2 47 1L2
3 47 1L3
4 1L1 45
5 1L2 45
6 1L3 45