ST3 6-10kVA Service Manual Rev.1
Allis Electric Page 7 of total 12 September 2006
3. Troubleshooting
3.4 Inverter Analysis
6/10kVA-Inverter-Right side
6/10kVA-Inverter-Middle side
6/10kVA-Inverter-Left side
Step
Checked components
Instrument
function
Reference
Value
Failure Mode
(E,C)
Ω
100k
Ω
Short
1
Q201,Q202,
Q203,Q204
(G,E)
Ω
23.5k
Ω
Short or Open
2
D201,D202,D203,D204,D205
Diode 0.36V
0V
3
D210,D211,D212,D213
Diode 46
Ω
Open
4
R201,R202,R208,R209
Ω
10
Ω
Open
5
R203,R204,R210,R211
Ω
36
Ω
Open
Action ltem:
Make sure the DC fuses with same rating as original ones for replacement. Otherwise,
unpredictable danger might happen.
