CIGWELD 170Oi - Preliminary Check of the Main Inverter PCB

TRANSTIG 170Pi
Manual 0-5242 6-7 TROUBLESHOOTING
6.08 Preliminary Check of the Main Inverter PCB
Art # A-11814
Figure 6-4: Preliminary Check of the Main Inverter PCB
IGBT Testing Multimeter Lead Placement Diode Voltage
IGBT V8 & V8-1
Positive meter lead to TP 3
Negative meter lead to TP 4
0.2 – 0.8 VDC
IGBT T1 & T2
Positive meter lead to TP 5
Negative meter lead to TP 6
0.2 – 0.8 VDC
IGBT T4 & T5
Positive meter lead to TP 7
Negative meter lead to TP 8
0.2 – 0.8 VDC
Table 6-4: IGBT’s, Multimeter set to measure Diode Voltage
IGBT Testing Multimeter Lead Placement Ohms
IGBT V8 & V8-1 Positive meter lead to TP 4
Negative meter lead to TP 3
>150 Ω
IGBT T1 & T2 Positive meter lead to TP 6
Negative meter lead to TP 5
>150 Ω
IGBT T4 & T5 Positive meter lead to TP 8
Negative meter lead to TP 7
>150 Ω
Table 6-5: IGBT’s, Multimeter set to measure ohms (Ω)
Inrush Resistor Multimeter Lead Placement Ohms
Resistor
Positive meter lead to TP 9
Negative meter lead to TP 10
4 Ω
Table 6-6: Inrush PTC, Multimeter set to measure ohms (Ω)