Mitsubishi Electric Mr.Slim PUHZ-SHW80VHA Service Manual page 100

PUHZ-SHW112YHA
OPERATING PROCEDURE
1. Removing the service panel and top panel
(1) Remove 3 service panel fixing screws (5 × 12) and slide
the hook on the right downward to remove the service
panel.
(2) Remove screws (3 for front, 3 for rear/5 × 12) of the top
panel and remove it.
2. Removing the fan motor (MF1, MF2)
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove 5 fan grille fixing screws (5 × 12) to detach the
fan grille. (See Photo 1)
(4) Remove a nut (for right handed screw of M6) to detach the
propeller. (See Photo 2-1)
(5) Disconnect the connectors, CNF1, CNF2 on controller cir-
cuit board in electrical parts box.
(6) Remove 4 fan motor fixing screws (5 × 20) to detach the
fan motor. (See Photo 2-2)
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 indoor/outdoor connecting wire and power
supply wire from terminal block.
(4) Disconnect the connector CNF1, CNF2, LEV-A, LEV-B and
LEV-C on the controller circuit board.
<Symbols on the board>
• CNF1, CNF2 : Fan motor
• LEV-A, LEV-B, LEV-C : LEV
(5) Disconnect the pipe-side connections of the following parts.
• Thermistor <Liquid>(TH3)
• Thermistor <Discharge>(TH4)
• Thermistor <2-phase pipe>(TH6)
• Thermistor <Ambient>(TH7)
• Thermistor <Suction> (TH32)
• Thermistor <Ref. check> (TH33)
• Thermistor <Comp. surface> (TH34)
• High pressure switch (63H)
• Low pressure switch (63L)
• High pressure sensor (63HS)
• 4-way valve coil (21S4)
• Reactors (ACL1, ACL2, ACL3)
(6) Remove the terminal cover and disconnect the compressor
lead wire.
(7) Remove 2 electrical parts box fixing screws (4 × 10) and
detach the electrical parts box by pulling it upward. The
electrical parts box is fixed with 2 hooks on the left and 1
hook on the right.
OCH526
PUHZ-SHW140YHA
PHOTOS & ILLUSTRATION
Top panel fixing screws
Photo 1
Grille
fixing
screws
Grille
fixing
screws
Photo 2-1
Propeller Front panel
Nut
Photo 3
Noise filter circuit
board (N.F.)
Terminal block (TB1)
100
Top panel
Service panel
fixing screw
Fan grille
Service panel
Slide
Service panel
fixing screws
Photo 2-2
Fan motor fixing screws
Fan motor fixing screws
Controller circuit
board (C.B.) Electrical parts box
Electrical
parts box
fixing
screw
Terminal block (TB2)
Fan
motor