Mitsubishi Electric PUHZ-SW75VHA.UK Service Manual page 76

PUHZ-SW100YHA.UK
PUHZ-SW120YHA.UK
PUHZ-SW100YHAR1.UK
PUHZ-SW120YHAR1.UK
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 (2 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. (Top and bottom) (See Photo 1)
(4) Remove a nut (for right handed screw of M6) to detach
the propeller. (Top and bottom) (See Photo 2-1)
(5) Disconnect the connectors, CNF1, CNF2 on controller
circuit board in control box.
(6) Loosen 6 clamps on the separator and motor support,
then unbind the lead wires.
(7) Remove 4 fan motor fixing screws (5 × 20) to detach the
fan motor. (Top and bottom) (See Photo 2-2)
3. Removing the control 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 and LEV-B
on the controller circuit board.
<Symbols on the board>
• CNF1, CNF2 : Fan motor
• LEV-A, LEV-B : LEV
(5) Disconnect the pipe-side connections of the following parts.
<Diagram symbol in the connector housing>
• Thermistor <Liquid> (TH3)
• Thermistor <Discharge> (TH4)
• Thermistor <2-phase pipe, Ambient> (TH6/7)
• High pressure switch (63H)
• High pressure sensor (63HS)
• Low pressure switch (63L)
• 4-way valve coil (21S4)
• Thermistor <Comp. surface> (TH34)
(6) Remove the terminal cover and disconnect the compres-
sor lead wire.
(7) Loosen 3 clamps on the separator and unbind the lead
wires.
(8) Remove an control box fixing screw (4 × 10) and detach
the control box by pulling it upward. The control box is
fixed with 2 hooks on the left and 1 hook on the right.
OCH533B
PUHZ-SW100YHA-BS.UK
PUHZ-SW120YHA-BS.UK
PUHZ-SW100YHAR1-BS.UK
PUHZ-SW120YHAR1-BS.UK
76
PHOTOS & ILLUSTRATION
Photo 1
Top panel fixing screws
Grille
fixing
screws
Grille
fixing
screws
Photo 2-1
Front panel
Propeller
Nut
Photo 3-1
Controller circuit
Front panel
8
Screw
board (C.B.)
9
Screw
Top panel
Service panel
fixing screws
Service panel
Fan grille
Slide
Service panel
fixing screws
Photo 2-2
Fan
Fan motor fixing screws
motor
Fan motor fixing screws
Electrical
parts box
Noise filter
circuit
board (N.F.)
Terminal
block (TB1)
Terminal
block (TB2)
Valve bed
Compressor
(MC)
Terminal
cover
Cover panel
(Front)
Cover panel fixing screws
Continued to the next page.