Mitsubishi Electric PUZ-M200YKA Service Manual page 104

OPERATING PROCEDURE
3. Removing the electrical parts box
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Disconnect the power supply cable from terminal block.
(4) Disconnect the indoor/outdoor connecting wire from ter-
minal block.
(5) Disconnect the connector CNF1 (WHT), CNF2 (WHT),
TH3 (WHT), TH4 (WHT), TH7/6 (RED), TH33 (YE),
63H(YLW), 21S4 (GRN), LEV-A (WHT), LEV-B (RD) from
the controller circuit board.
<Symbols on the board>
• Fan motor (CNF1, CNF2)
• Thermistor <Liquid> (TH3)
• Thermistor <Ambient/ 2-Phase Pipe> (TH7/6)
• Thermistor <Comp. Surface> (TH33)
• Thermistor <Discharge> (TH4)
• High pressure switch (63H)
• 4-way valve (21S4)
• LEV (LEV-A/LEV-B)
(6) Loosen the clamps, fasteners and cable strap for the
lead wire in the electrical parts box and separator.
(7) Loosen the lead wires fixed to the pipes with bands.
(8) To disconnect the COMP lead wire, remove the terminal
cover, then remove the COMP lead wire fixing screws (3
for front/ 5 x 12).
(9) Remove the electrical parts box fixing screws (2 for front/
4 x 10), then slide the electrical parts box upward to
remove it.
(The electrical parts box is fixed to the side panel (R) with
a hook on the right side, and to the separator duct with a
hook on the left side.)
OCH737
PHOTOS/FIGURES
Photo 4
Controller
circuit board
Terminal block
(Power supply)
Valve bed
Valve bed
fixing screw
Terminal cover
Compressor
104
Electrical parts box
Electrical
parts box
fixing screws
Side panel (R)
Terminal block
(Indoor/Outdoor)
Valve bed
fixing screws