Mitsubishi Electric Mr.SLIM PU-P71VHA Service Manual page 77

PU(H)-P125YHA.UK
PU(H)-P125YHA#2.UK
PU(H)-P125YHAR4.UK
OPERATING PROCEDURE
1. Removing the service panel and top panel
(1) Remove 3 service panel fixing screws (5 × 10) and slide
the hook on the right downward to remove the service
panel.
(2) Remove screws (3 for front, 3 for rear/5 × 10) of the top
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 × 10) to detach the 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 × 16) to detach the
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 × 8) from the valve bad to remove
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 × 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.
OC379F
PU(H)-P140YHA.UK
PU(H)-P140YHA#2.UK
PU(H)-P140YHAR4.UK
77
PU(H)-P125YHA .UK
1
PU(H)-P125YHAR3.UK
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
Cover panel fixing screws
PU(H)-P140YHA .UK
1
PU(H)-P140YHAR3.UK
Top panel
Service panel
Slide
Fan grille
Service panel
fixing screws
Photo 2
Fan motor
(MF)
Fan motor fixing screws
Electrical parts box
Controller circuit
board (O.B.)
Terminal block
(TB1) (TB2)
Valve bed
Cover panel (Front)