Thermal Dynamics C-20A Cutskill Service Manual page 27

B. Component Tests
Disconnect primary power at the source before taking any resistance checks.
1. Input Diode Module Board Circuit Test
a. Check Input Diode for short per schematic located in Appendix 4.
2. IGBT Module Test
a. With an ohmmeter set on the diode range remove P5 from the IGBT and make the following IGBT checks:
b. If reading is not as shown, replace both IGBT modules and Gate PCB.
c. Reconnect P5 connector.
Manual 0-4697
Gate PCB J5 IGBT Check
+ -
E1 Red
Red E1
1 Black
Black E1
E1 G1
G1 E1
E2 G2
G2 E2
E3 Red
Red E3
E3 Black
Black E3
G3 E3
E3 G3
G4 E4
E4 G4
Diode Test
P5 Gate Connector
1 G1 Black
TW
2 E1 White
3 G2 Green
TW
4 E2 Red
5 G3 Black
TW
6 E3 White
7 G4 Green
TW
8 E4 Red
Pin-out diagram
WARNING
DD (1.020)
Open After Charging
Open After Charging
DD (1.270)
DD (.770)
DD (.770)
DD (.770)
DD (.770)
DD (1.270)
Open After Charging
DD (.770)
DD (.770)
DD (.770)
DD (.770)
DD (.770)
DD (.770)
Control Connector
1 Black
2 White
CN8
3 Green
4 Red
1 Black
2 White
CN6
3 Green
4 Red
6-7 TROUBLE SHOOTING