Mitsubishi Electric PUHZ-SW160YKA-BS Service Manual page 61

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
terminal block.
(5) Disconnect the connector CNF1 (WHT), CNF2 (WHT),
TH3 (WHT), TH7/ 6 (RED), TH32 (BLK), 63H (YLW), 21S4
(GRN), LEV-A (WHT) and 63HS (WHT) 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> (TH32)
• High pressure switch (63H)
• 4-way valve (21S4)
• LEV (LEV-A)
• High pressure sensor (63HS)
(6) Loosen the clamps, fasteners and cable strap for the lead
wire in the electrical parts box and separator.
(See photo 4)
(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 (4
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.)
OCH583A
Photo 4
Controller
circuit board
Terminal block
(Power supply)
Valve bed
fixing screw
Valve bed
Terminal
cover
Compressor
61
PHOTOS
Electrical parts box
Electrical parts
box fixing screws
Terminal block
(Indoor/Outdoor)
Side panel (R)