Owner manual

9–8 Troubleshooting
Publication 1302-5.0 — January, 1998
Table 9.2 - Resistance Checks for Input Diodes
Input
Diode No.
Meter Connection
(+)ąąąąąą(ć)
Component is OK if
resistance (R) is:
Component is
defective if:
1 * R/L1
50 < R < 10 Megohm Continuity (short circuit) or
hh i
2*S/L2
g
y( )
open when the meter is
t d ith d
3*T/L3
p
connected with reversed
polarity
4 R/L1 **
polarity.
5 S/L2 **
6 T/L3 **
*(+)DC bus volts power terminal
** (ć) DC bus volts power terminal
Table 9.3 - Resistance Checks for IGBTs
IGBT No.
Meter Connection
(+)ąąąąąą(ć)
Component is OK if
resistance (R) is:
Component is
defective if:
1 * W/T3
50 < R < 10 Megohm Continuity (short circuit) or
hh i
2*V/T2
g
y( )
open when the meter is
t d ith d
3*U/T1
p
connected with reversed
polarity
4 W/T3 **
polarity.
5 V/T2 **
6 U/T1 **
*(+)DC bus volts power terminal
** (ć) DC bus volts power terminal