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AC IGBT DTE 200, test and fitting instructions
Remove the AC unit from the machine and r emove Circuit board AP09 from the two IGBT
modules. Use a multimeter in diode test position to measure as shown in the diagram below.
Generally, if the IGBT module has burnt out, one or more of the high--speed fuses on AP09
will also have blown. Check the fuses. The circuit diagram for AP09 is on page 56.
Warning: The IGBT modules are sensitive to ESD.
Test measuring AC IGBT module, DTE 200
Instructions for reconnection of the cables to the IGBT modules and circuit board AP09 are
on page 67.
Fitting in structions for Q01 and Q02
The IGBT modules are extremely sensitive to E SD. Never touch a module having an open
gate input. Apply appropriate ESD protection measures when fitting the modules.
Start by cleaning the heat sink, and then apply a thin, even layer of thermally conducting
grease to the contact surface of the module. The purpose of this grease is to fill any hollows
in the surface of the module and the heat sink: those parts of the module and the heat sink that
are in true metallic contact may have such contact.
The order number for the thermally conducting grease is given under item 412 in the spare
parts list. Only the grease recommended by us may be used.
Fit the module and tighten the screws to a torque of 1 Nm. Further tighten the screws to a
torque of 3. 0 Nm, tightening them alternately.
Warning: An incorrectly fitted IGBT module can lead to failure. Do not tighten the screws
harder than 3.0 Nm.
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