Linde E25 Service Training page 63

Service Training
TESTING THE FREEWHEEL AND BRAKE DIODES IN THE POWER MODULE
- Perform the test with the multimeter set to the Ohm range, + lead connected to 6, - lead connected one
after the other to 2, 3 and 4.
The diodes block, high impedance is indicated.
- - lead connected to 6, + lead connected one after the other to 2, 3 and 4.
The diodes do not block, low impedance is indicated.
- If both readings are the same, the protective diode is defective.
Section 2.6
Page 9