Auxiliary Snubber Panel Troubleshooting; Auxiliary Snubber Schematic - Komatsu 930E-2 Shop Manual

Auxiliary Snubber Panel
Troubleshooting
The Auxiliary Capacitor Panel remains charged for
at least 15 minutes after engine shutdown. Be
certain LED's D1 and D2 (6, Figure 3-12) are OFF
before working on Auxiliary Blower Control cir-
cuits.
1. After verifying capacitor charge warning LED's (6,
Figure 3-12) are not lit, disconnect external wiring
from snubber panel terminals (3, Figure 3-10) to
isolate the panel from other system components
before making measurements.
2. Using an ohmmeter and capacitance meter, verify
Snubber Panel components by measuring resis-
tance values between points shown in Table be-
low. Refer to Figure 3-10 and 3-11 for test point
locations.
Measuring Point
From To
1 C2-4
1 C1-4
2 C3-4
3 C2-2
C1-2 R1-1
3 C3-2
C1-4 C1-2
C2-4 C2-2
C3-4 C3-2
3. After all measurements have been made and
repairs completed if needed, reconnect wiring
removed in step 1.
E3-42
Specified Value
Minimum Maximum
23.75 Ω 26.25 Ω
23.75 Ω 26.25 Ω
23.75 Ω 26.25 Ω
0 Ω 0 Ω
0 Ω 0 Ω
0 Ω 0 Ω
0.10 µF 0.17 µF
0.10 µF 0.17 µF
0.10 µF 0.17 µF
AC Drive System Electrical Checkout Procedure
(Release 17 Software)
FIGURE 3-16. AUXILIARY SNUBBER PANEL
1. Capacitor
2. Choke
FIGURE 3-17. AUXILIARY SNUBBER SCHEMATIC
3. Terminals
3/01 E03015