Mitsubishi Electric MVZ-A12 Manuel D'installation page 14

As a result of innovative multi-position design, the air handler may
buildup. A Condensate Management Kit should be used to mitigate
such water runoff.
Step. 1 Please refer to 9.3. Steps 1 to 4 for removing the panels
which cover the Electrical, Coil Assembly, Blower and Filter.
C
A
B
Step.2
A. Unplug the Thermistor (CN44) from the control board and route
the harness from control box area out through the rubber grommet.
B. Remove the brackets which secure the coil assembly if not
already done.
C. Slide the coil assembly out of the air handler cabinet.
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Step. 3 Rotate the cabinet so the Fan assembly is on top.
Step. 4a Reinsert the coil assembly back into the cabinet. The
bracket(s) are not required to be reattached.