Mitsubishi Electric PU-P71VHA Service Manual page 70

PUH-P125YHA.UK PUH-P140YHA.UK PU-P125YHA.UK PU-P140YHA.UK
OPERATING PROCEDURE
1. Removing the service panel and top panel
(1) Remove 3 service panel fixing screws (5
the hook on the right downward to remove the service
panel.
(2) Remove screws (3 for front, 3 for rear/5
panel and remove it.
2. Removing the fan motor (MF)
(1) Remove the service panel. (See figure 1.)
(2) Remove the top panel. (See figure 1.)
(3) Remove 5 fan grille fixing screws (5
fan grille. (See figure 1.)
(4) Remove a nut (for right handed screw of M6) to detach
the propeller. (See photo 1.)
(5) Disconnect the connectors, MF3, MF4 on controller
circuit board in electrical parts box.
(6) Remove 3 fan motor fixing screws (5
fan motor. (See photo 2.)
3. Removing the electrical parts box
(1) Remove the service panel. (See figure 1.)
(2) Remove the top panel. (See figure 1.)
(3) Disconnect the indoor/outdoor connecting wire from
terminal block.
(4) Remove all the following connectors from controller circuit board;
fan motor, linear expansion valve, thermistor <Outdoor pipe>,
thermistor <Discharge>, thermistor <Outdoor 2-phase pipe>,
high pressure switch, solenoid valve coil <Four-way valve>
and solenoid valve coil <Bypass valve>.
Then remove a screw (4
the lead wire.
Pull out the disconnected wire from the electrical parts box.
<Diagram symbol in the connector housing>
• Fan motor (MF3, MF4)
• Linear expansion valve (CNLEV)
• Thermistor <Discharge> (TH4)
• Thermistor <Outdoor 2-phase pipe, Outdoor pipe> (TH3/ TH6)
• Crankcase heater (CH)
• High pressure switch (63H)
• Solenoid valve coil <Four-way valve> (21S4)
• Low pressure switch (63L)
• Solenoid valve coil <Bypass valve> (SV)
(5) Remove the terminal cover and disconnect the
compressor lead wire.
(6) Remove an electrical parts box fixing screw (4
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.
10) and slide
10) of the top
10) to detach the
16) to detach the
8) from the valve bad to remove
10) and
PHOTOS & ILLUSTRATION
Top panel fixing screws
Figure 1
Grille
fixing
screws
Grille
fixing
screws
Photo 1
Front panel
Propeller
Nut
Front panel fixing screws
Photo 3
Electrical
parts box
Cover panel fixing screws
70
Top panel
Service panel
Slide
Fan grille
Service panel
fixing screws
Photo 2
Fan motor
(MF)
Fan motor fixing screws
Controller circuit
board (O.B.)
Terminal block
(TB1) (TB2)
Valve bed
Cover panel (Front)