Mitsubishi Electric PUHZ-ZRP100VKA3 Service Manual page 105

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), TH4 (WHT), TH7/ 6 (RED), TH33 (BLK),
21S4 (GRN), 63H (YLW), LEV-A (WHT), LEV-B (RED) and
LEV-C (BLU) from the controller circuit board.
<Symbols on the board>
• Fan motor (CNF1, CNF2)
• Thermistor <Liquid> (TH3)
• Thermistor <Discharge> (TH4)
• Thermistor <Ambient/ 2-Phase Pipe> (TH7/6)
• Thermistor <Comp. Surface> (TH33)
• 4-way valve (21S4)
• High pressure switch (63H)
• LEV (LEV-A and LEV- B) (LEV-C (140 only))
(6) Loosen the clamps, fasteners and cable strap for the lead
wire in the electrical parts box and separator.
(See photo 4 or 5)
(7) Loosen the lead wires fixed to the pipes with bands.
(8) Remove the terminal cover to disconnect the COMP lead
wire.
(9) Remove the electrical parts box fixing screws, then slide
the electrical parts box upward to remove it.
Note that number of the electrical parts box fixing screw
is different on each model, V or Y.
• V model: 2 for front/ 4 x 10
• Y model: 3 for front/ 4 x 10
(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.)
OCH645
Photo 4 (V model)
Controller
circuit board
Terminal block
Valve bed
fixing screw
Valve bed
Terminal cover
Compressor
Photo 5 (Y model)
Controller
circuit board
Terminal block
Valve bed
fixing screw
Valve bed
Terminal
cover
Compressor
105
PHOTOS
Electrical parts box
Electrical parts
box fixing screws
Side panel (R)
Valve bed fixing screws
Electrical parts box
Electrical parts
box fixing screws
Side panel (R)
Valve bed fixing screws