Trane TR170 - Power Card; Heat Sink and DC Coils

7.6.3 Power Card
1. Remove the 4 screws (T10) for the DC coil cables.
2. Remove the 5 screws (T10) for the heat sink.
3. Remove the 4 IGBT screws (T25).
4. Unplug fan cable connector.
CAUTION
The power card and the heat sink have thermal paste on
them. Wear protective gloves as the paste is poisonous.
5. Lift out the power card.
6. Remove the capacitor bank gasket.
Reinstall in the reverse order.
1Power card
Illustration 7.28 Power Card
7.6.4 Heat Sink and DC Coils
1. Remove the 7 mounting screws from top surface.
2. Press and loosen the 3 barbs at the bottom.
3. Unplug the DC coil cables.
4. Remove the heat sink.
5. Lift out the DC coils.
Reinstall in the reverse order.
1Heat sink
Illustration 7.29 Heat Sink
1DC coil
Illustration 7.30 DC Coil
H-Frame Size Disassembly a... TR150 and TR170 Service Manual
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