Mitsubishi Electric PUMY-P112VKM4 Technical & Service Manual page 153

PUMY-P112YKM4(-BS)
PUMY-P112YKME4(-BS)
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 4 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.)
(5) Disconnect the connectors, CNF1 and CNF2 on out-
door multi controller circuit board in electrical parts
box.
(6) Remove 4 fan motor fixing screws (5 × 20) to detach
the fan motor. (See Photo 3)
Note: Tighten the propeller fan with a torque of 5.7 ±
0.3N·m [4.2 ± 0.2 lbf·ft].
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 connecting wire from terminal block.
(4) Remove all the following connectors from outdoor multi
controller circuit board;
<Diagram symbol in the connector housing>
• Fan motor (CNF1, CNF2)
• Thermistor <HIC pipe> (TH2)
• Thermistor <Outdoor liquid pipe> (TH3)
• Thermistor <Compressor> (TH4)
• Thermistor <Suction pipe/Ambient>
(TH6/7)
• High pressure switch (63H)
• High pressure sensor (63HS)
• Low pressure sensor (63LS)
• 4-way valve (21S4)
• Bypass valve (SV1)
Pull out the disconnected wire from the electrical parts
box.
(5) Remove the terminal cover and disconnect the com-
pressor lead wire.
OCH673D
PUMY-P125YKM4(-BS)
PUMY-P125YKME4(-BS)
Photo 1
Grille fixing
screws
Grille fixing
screws
Photo 2
Propeller
Photo 4
Front panel fixing
screws (5x12)
Front
panel
fixing
screws
(4x10)
Valve bed
fixing
screw
153
PUMY-P140YKM4(-BS)
PUMY-P140YKME4(-BS)
Note: Turn OFF the power supply before disassembly.
PHOTOS/FIGURES
Top panel fixing screws
Photo 3
Front panel
Nut
Electrical parts box
Front panel
Cover panel
fixing screws (5x12)
fixing screws
Continue to the next page.
Top panel
Service panel
fixing screw
Service
panel
Slide
Fan grille
Service panel
fixing screws
Fan motor fixing screws
Fan
motor
Fan motor fixing screws
Noise filter
circuit board
(NF)
Outdoor multi
controller
circuit board
(MULTI.B)
Terminal blocks
(TB3) (TB7)
Terminal block
(TB1B)
Terminal block
(TB1)
Valve bed
fixing screws
Valve bed
Compressor
(MC)
Terminal cover
Cover panel
(Rear)
Cover panel
(Front)