Toshiba MMU-AP0074YH-E Service Manual page 146

2. Removing the heat exchanger
1) Follow "1. Removing the electrical control assembly" to remove the electrical control assembly.
2) Remove the connecting pipes. (Liquid and gas pipes)
3) Remove the strengthening board. (2 M4 screws)
4) Remove the upper panel.
5) Remove the vertical grille. (4 M4 screws)
6) Remove the heat exchange shield (front). (3 M4 screws)
7) Remove the heat exchange shield (right). (2 M4 screws)
8) Remove the screws fixing the heat exchanger. (4 M4 screws)
9) Remove the shield on the side of the heat exchanger. (2 M4 screws)
10) Slide the heat exchanger to the right, keep the connecting pipe away from the drain pan, and then pull the exchanger upward.
Strengthening board
Vertical grille
Heat exchange shield (front)
Screws
Upper panel
Screws
(Remove this before sliding the heat
exchanger to the right)
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Heat exchange shield (right)
Shield