Mitsubishi Electric Mr.SLIM PUHZ-RP1.6VHA Technical & Service Manual page 91

PUHZ-RP4VHA PUHZ-RP5VHA PUHZ-RP6VHA
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 (MF1, MF2)
(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, FAN11, FAN12, FAN21 and
FAN 22 on controller circuit board in electrical parts box.
(6) Remove 4 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>,
thermistor <Outdoor>, high pressure switch, low pressure
switch, solenoid valve coil <Four-way valve> and solenoid
valve coil <Bypass valve>. Then remove a screw (4
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 (FAN11, FAN12, FAN21 and FAN22)
• Linear expansion valve (LEV-A and LEV-B)
• Thermistor <Outdoor pipe> (TH3)
• Thermistor <Discharge> (TH4)
• Thermistor <Outdoor 2-phase pipe, Outdoor> (TH6/7)
• High pressure switch (63H)
• Low pressure switch (63L)
• Solenoid valve coil <Four-way valve> (21S4)
• Solenoid valve coil <Bypass valve> (SV2)
(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.
Figure 1
10) and slide
Grille
10) of the top
fixing
screws
Grille
fixing
screws
Photo 1
10) to detach the
Nut
25) to detach the
Photo 3
8)
10) and
91
PHOTOS & ILLUSTRATION
Top panel fixing screws
Slide
Photo 2
Front panel
Propeller Fan motor fixing screws
Fan motor fixing screws
Controller circuit board
(C.B.)
Screw
Cover panel fixing screws
Top panel
Service panel
Fan grille
Service panel
fixing screws
Fan
motor
Electrical
parts box
Electrical parts
box fixing screw
Terminal block
(TB1)
Valve bed
Motor for
compressor
(MC)
Terminal cover
Cover panel
(Front)