32
the corresponding driver is damaged, so please try to change the IGBT driver component.
7.2.5.2 Major parameters of Inverter and STS section
The most likely problems occur on the INV section including broken IGBT, broken Diode, broken SCR,
damaged IGBT/SCR driver resistor, damaged relative snubber circuit with broken IGBT/SCR, and stuck
output relay.
10K R-PFC&INV Section
Checked components
Instrument function
Reference Value
Failed Condition
F2, F4
Resistance
< 0.5 Ω
Open
Q17, Q18,
(A, K)
Resistance
6M
Ω
(G, K)
Resistance
33
Ω
Q19
(A, K)
Resistance
10M
Ω
(G, K)
Resistance
33
Ω
R103, R111, R116
Resistance
39Ω
Value change
Q24, Q25
(E, C)
Diode Voltage Droop
0.38V
(E, G)
Diode Voltage Droop
1.4V
(G, E)
Resistance
47.5
KΩ
D29, D30
(need be removed from PCB)
Diode Voltage Droop
0.61V
Short or open
R122, R126
Resistance
10Ω
Infinite or value change
R159, R163
Resistance
2.2Ω
D33, D35
Diode Voltage Droop
0.38V
Short or open
D34, D36
Diode Voltage Droop
0.38V
Short or open
D49, D50
Diode Voltage Droop
0.38V
Short or open
TVS1, TVS2, TVS3, TVS4, TVS5,
TVS6
Diode Voltage Droop
0.53V
Short or open
Q7, Q8, Q9, Q10
(E, C)
Diode Voltage Droop
0.38V
Short or open
(E, G)
Diode Voltage Droop
1.4V
Short or open
(G, E)
Resistance
25.5
KΩ
Short or open
D22, D23, D24, D25
(need be removed from PCB)
Diode Voltage Droop
0.61V
Short or open
R45, R46, R52, R53
Resistance
22
Ω for 40N120 IGBT
10
Ω for 40B120U IGBT
Infinite or value change
R47, R48, R54, R55
Resistance
62
Ω for 40N120 IGBT
36
Ω for 40B120U IGBT
Infinite or value change
D15, D16
Diode Voltage Droop
0.38V
Short or open
Not install when
use 40N120 IGBT
D17, D18
Diode Voltage Droop
0.38V
Short or open
Q13, Q14
(A, K)
Resistance
0(Short by the INV.RLY)
---
(G, K)
Resistance
33
Ω
Short
Q20, Q31
(A, K)
Resistance
6M
Ω
Short
(G, K)
Resistance
33
Ω
Short
15K/20K INV Section
Checked components
Instrument function
Reference Value
Failed Condition
Q9, Q10,Q11,Q12,
(E, C)
Diode Voltage Droop
0.38V
Short or open
Содержание G31 10K
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