Linde E25 Service Training page 61

Service Training
TESTING IF POWER MODULE IS ON
- Connect the ohmmeter to source 1 and drain 2 (+ lead to the drain and - lead to source)
- Connect a 9 Volt block battery with - to auxiliary source 1 of the 6-pin plug (7); control the module with the
+ lead to gate terminal 3 of the 6-pin plug (7).
If there is positive voltage at the gate, the module is on and the impedance between source and drain is
zero.
If the impedance is highly resistive, the module is not working properly.
CAUTION: When connecting the 9 Volt block battery to gate terminal 3 and to auxiliary source terminal 1
of the 6-pin plug, make absolutely sure that the polarity is correct. To reduce the test current,
install a 1 kOhm/0.25 W resistor (8) in the 9 Volt battery lead.
Section 2.6
Page 7