Power Module Tests - Linde E25 Service Training

Section 2.6
Page 6
2.6.1.3

POWER MODULE TESTS

The tests for the traction and lift control power module are the same.
TEST CONDITIONS:
- To test the power modules, you need a multimeter for measuring impedance and a 9 Volt block battery.
- When performing the test with the modules on the truck, disconnect the battery plug and disconnect the
main circuit lines on the power module.
.
TESTING IF POWER MODULE IS OFF
- Connect the ohmmeter to source 1 and drain 2 (+ lead to the drain and - lead to the source). If there is no
voltage measured at the gate, the module is off. The impedance between source and drain is highly
resistive.
If the impedance between source and drain is low, the module is not working properly.
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