Mitsubishi Electric PUHZ-RP3VHA Technical & Service Manual page 71

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 grille fixing screws (5
(See figure 1.)
(4) Remove a nut (for right handed screw of M6) to detach
the propeller fan. (See photo 1.)
(5) Disconnect the connectors, FAN11, FAN12, FAN21 and
FAN 22 on controller 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 board;
fan motor, linear expansion valve, outdoor pipe temperature
thermistor, discharge temperature thermistor,
condenser/evaporator temperature thermistor,
outside temperature thermistor, radiator panel temperature
thermistor, high pressure switch, high pressure switch,
4-way valve, and 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 (FAN11, FAN12, FAN21 and FAN22) •
Linear expansion valve (LEV-A and LEV-B) •
Outdoor pipe temperature thermistor (TH3) •
Discharge temperature thermistor (TH4) •
Condenser/evaporator temperature thermistor,
Outside temperature thermistor (TH6/7) •
Radiator panel temperature thermistor (CN3) •
High pressure switch (63H) • Low pressure switch (63L) •
4-way valve (21S4) • 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.
10) and slide
10) of the top
10) to detach the grille.
Nut
25) to detach the
10) and
71
PHOTOS & ILLUSTRATION
Top panel fixing screws
Figure 1
Grille
fixing
screws
Grille
fixing
screws
Photo 1 Photo 2
Front panel
Propeller fan
Fan motor fixing screws
Photo 3
Outdoor unit
controller board
Screw
Cover panel fixing screws
Top panel
Service panel
Slide
Grille
Service panel
fixing screws
Fan
motor
Fan motor fixing screws
Electrical
parts box
Electrical parts
box fixing screw
Terminal block
Valve bed
Compressor
Terminal cover
Cover panel
(Front)