Mitsubishi Electric CAHV-R450YA-HPB Service Manual page 172

[ X Troubleshooting ]
2. Thermistor replacement instructions
Procedure
(1) Unscrew the six screws, and remove the service panel FU
on the top left.
(2) Unscrew the four screws, and remove the control box
panel.
(3) Disconnect the wire from the control box, unscrew the
three screws, take the control box out of the box, and set it
down. (Control box: Approximately 25 kg)
(4) Slide off the four tie bands and the pipe cover from the
back of the water heat-exchanger.
HWE22020
Screws (4 places)
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Illustration
Service panel FU
Screws (6 places)
Control box panel
Control box
Screws (3 places)
Tie bands (4 places)
Pipe cover
GB