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10 DISASSEMBLY PROCEDURE
10-1. OUTDOOR UNIT
MXZ-4C36NAHZ(-U1) MXZ-5C42NAHZ(-U1) MXZ-8C48NAHZ(-U1)
OPERATING PROCEDURE
1. Removing the service panel and top panel
(1) Remove 3 service panel fixing screws (5 × 12), then 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.
Photo 1
Top panel fixing screws
Top panel
Service panel
fixing screws
Service
panel
Fan grille
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 the multi
controller circuit board in the 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 i 0.3 N·m
[4.2 i 0.2 ft = lbs]
Fan motor fixing screws
Photo 4
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 of the following connectors from 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, Outdoor> (TH7/6)
• High pressure switch (63H)
• High pressure sensor (63HS)
• Low pressure sensor (63LS)
• 4-way valve (21S4)
• Bypass valve (SV1, SV2)
• Electronic expansion valve (LEV-A, LEV-B)
• Base heater (SS)
Pull out the disconnected wire from the electrical parts box.
(5) Remove the terminal cover and disconnect the compressor
lead wire from the comp. terminal. (See Figure 1.)
Note: The terminal cover can be easily removed by using a
blade of flathead screwdriver.
Photo 2
Fan
motor
Fan motor fixing screws
Propeller Front panel
Nut
Photo 3
Electrical parts box
Terminal cover
Cover panel
(Front)
Valve bed
Side panel(R)
Terminal block
(TB1)
Terminal block
(TB1B)
Multi controller
circuit board
(MULTI.B)
Compressor (MC)
Grille fixing
screws
Grille fixing
screws
Slide
Service panel
fixing screw
Front panel fixing screws (5 x 12)
Front panel
fixing screws (5 x 12)
Valve bed
fixing screws
Cover panel
fixing screws
Continue to the next page
Terminal
block
(TB3) (TB7)
Cover panel
(Rear)
Figure 1
Terminal cover
Comp. terminal
Front panel
fixing screws
(4 x 10)
Note: Turn OFF the power supply before disassembly.
PHOTOS & ILLUSTRATION
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