Hypertherm Powermax125 Service Manua - Manual (Page 155)

Powermax125 Service Manual 808070 155
8 – Troubleshooting and System Tests
For operational fault codes 0-40-2 and 0-40-3 or power board faults 2-10-0 and 2-10-1
1. Remove the inverter temperature sensor connector from the top-rear of the power board (J2).
2. Measure the resistance between pins 1 and 3 on the plug.
3. If the resistance is not within ±15% of 10 kΩ (at approximately 25°C or 77°F), replace the temperature sensor.
4. If the value is correct, remove the DSP board and measure the resistance between pins 1 and 3 on the power board
with the temperature sensor disconnected. The resistance should be approximately 57.6 kΩ.
5. If the value is correct, replace the DSP board.
6. If the value is incorrect, replace the power board.
Figure 24
Inverter temperature sensor
connector (J2)