Trane TR170 - Relay Transducer Card; Igbt

7.5.6 Relay Transducer Card
1. Remove the 4 screws (T20) on the plate.
2. Carefully remove cables before removing the
plate.
3. Loosen the cables in the right cable connector
using a hex 8 key.
4. Pull out the cables.
5. Remove the 3 screws (T30) on the relay card.
6. Remove the 2 10-pin ribbon cables.
7. Remove the 3 screws (T20) from the relay card.
8. Press the 3 retaining clips.
9. Remove the relay card.
10. Remove the relay card mounting plate.
Reinstall in the reverse order.
1 Relay transducer card
2 Relay card mounting plate
Illustration 7.21 Relay Transducer Card
7.5.7 IGBT
CAUTION
Wear protective gloves when cleaning up the thermal
paste as it is poisonous.
1. Remove the 2 screws from the cable retaining
guide.
2. Remove the cable retaining guide.
3. Remove the 4 screws (T20) from the cable
connector plate.
4. Remove the cable connector plate.
5. Remove the 2 cable screws (T20)
6. Remove the 2 screws (T30) in each of the 2
capacitors.
7. Remove the capacitors.
8. Remove the 2 screws (T30) from the bus bar.
9. Remove the 4 screws (T20) holding the
capacitors.
10. Remove the bus bar.
11. Remove the gate cables from the IGBTs.
12. Remove the 4 screws from each IGBT.
13. Remove the thermal paper.
14. Remove the thermal paste from the IGBTs and
the heat sink.
Reinstall in the reverse order. Join the mounting snaps.
H-Frame Size Disassembly a... TR150 and TR170 Service Manual
BAS-SVM04B-EN 02/2017 All rights reserved. 69
7
7