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8.2. Front panel installation

(1) First, 

fi

 t the lower part of the front panel, and insert top and bottom hooks. (3 top 

sides, 2 center)

Indoor unit

Front panel

Latchs (2 position)

Center hooks 
(2 position)

Top hooks
(3 position)

Top holes (3 position)

(2)  Attach the 7 screws.
(3)  Attach the wire cover.
(4)  Attach the 3 caps.
(5)  Attach the intake grille.

 CAUTION

  Install the Front panel and Intake grille securely. If installation is imperfect, the Front 

panel or Intake grille may fall off and cause injury.

9.  

REMOTE CONTROLLER INSTALLATION

•  Check that the indoor unit correctly receives the signal from the remote controller, then 

install the remote controller holder.

 CAUTION

•  Select the remote controller holder selection site by paying careful attention to the 

following:
Avoid places in direct sunlight.
Select a place that will not be affected by the heat from a stove, etc.

9.1.  Remote controller holder installation

  Install the remote controller a maximum distance of 22 ft. (7 m) from the remote control 

receiver. However, when installing the remote controller, check that it operates cor-
rectly.

  Install the remote controller holder to a wall, pillar, etc. with the tapping screw.

remote controller 
holder 

fi

 xing

Remote 
controller holder

Tapping screw 
(small)

remote controller 
mounting

Remote 
controller

2

 Push

1

 Set

Overlap the insulation

Vinyl tape

Wrap with cloth tape 

Cloth tape

Drain hose

Connection cable

Pipe

Drain hose

Drain hose

Connection pipe

Wall pipe

Connection cable

Left piping

For connection from the left rear

Pipe

Connection pipe 
(heat insulation)

Indoor unit pipe
(heat insulation)

Bind the pipes together 
so that there is no gap.

Check the following:

GOOD

Drain hose

Saddle

Lifted up

Wave

End in water

PROHIBITED

8.  FRONT PANEL REMOVAL AND INSTALLATION

Intake grill removal

Intake grill installation

b

a

Open the intake 
grille. While gently 
pressing the left 
and right mounting 
shafts of the intake 
grille outward “a”, 
remove the intake 
grille in direction of 
the arrow “b”.

c

While holding the 
grille horizontal, set 
the left and right 
mounting shafts into 
the pillow blocks at 
the top of the panel 
“c”.
To latch each shaft 
properly, insert the 
shaft until it snaps.
Press 4 places on 
the intake grille to 
close it completely.

8.1. Front panel removal

 (1)  Remove intake grille (Reference the intake grille removal.)
 (2)  Remove 3 caps.
 (3)  Remove wire cover.
 (4)  Remove 7 screws.

 

Screws (Wire cover)

Screws ( 7 position )

Caps ( 3 position )

Diffuser

Wire cover

NOTE: 

When replacing the front panel, do not scratch or damage the diffuser.

 (5)  The front panel is pulled to the front, raising the upper surface, and a front panel is 

removed.

Front panel

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Summary of Contents for ASU12RLS3

Page 1: ... fingers When Installing In a Ceiling or Wall Make sure the ceiling wall is strong enough to hold the unit s weight It may be necessary to construct a strong wood or metal frame to provide added support In a Room Properly insulate any tubing run inside a room to prevent sweating that can cause drip ping and water damage to walls and floors In an Area with High Winds Securely anchor the outdoor uni...

Page 2: ...ing with conventional refrigerant R22 and for safety Therefore check beforehand The charging port thread diameter for R410A is 1 2 20 UNF Be more careful that foreign matter oil water etc does not enter the piping than with refrigerant R22 models Also when storing the piping securely seal the opening by pinching taping etc When charging the refrigerant take into account the slight change in the co...

Page 3: ...r volatile inflammables such as paint thinner or gasoline If gas leaks and settles around the unit it can cause a fire Area where animals may urinate on the unit or ammonia may be generated Do not use the unit for special purposes such as storing food raising animals grow ing plants or preserving precision devices or art objects It can degrade the quality of the preserved or stored objects Do not ...

Page 4: ...t pipes top Rear piping Indoor unit drain hose bottom No gap Hexagonal wrench Drain cock Drain cap For left outlet piping cut off the piping outlet cutting groove with a hacksaw Indoor unit drain hose Drain cap Remove the drain cap by pull ing at the projection at the end of the cap with pliers etc Removal method of drain hose Remove the screw at the left of drain hose and pull out drain hose Inst...

Page 5: ...ut correctly Tighten the flare nuts with a torque wrench using the specified tightening method Otherwise the flare nuts could break after a prolonged period causing refrigerant to leak and generate hazardous gas if the refrigerant comes into contact with a flame CAUTION Connect the piping so that the control box cover can easily be removed for servicing when necessary In order to prevent water fro...

Page 6: ...erminal screw tightening torques Tightening torque lbf in N m M4 screw 11 to 16 1 2 to 1 8 CAUTION Attach the cable clamp firmly by holding the connection cable and make sure that the clamp is fixed securely Incomplete attachment of the cable clamp might cause a malfunction of the open panel Match the terminal block numbers and connection cable colors with those of the outdoor unit Erroneous wirin...

Page 7: ...roller holder Tapping screw small remote controller mounting Remote controller 2 Push 1 Set Overlap the insulation Vinyl tape Wrap with cloth tape Cloth tape Drain hose Connection cable Pipe Drain hose Drain hose Connection pipe Wall pipe Connection cable Left piping For connection from the left rear Pipe Connection pipe heat insulation Indoor unit pipe heat insulation Bind the pipes together so t...

Page 8: ...ng intake grille and front panel See 9 FRONT PANEL REMOVAL AND INSTALLATION and 9 1 Front panel removal 11 2 2 Removing control cover Screw 2 Control cover Control box Screw 1 Remove the screw 1 and 2 then remove the control cover 11 2 3 Installing relay control board and relay wire terminal Control unit board Connector CN2 Relay wire Notice 2 Clasps Connector CND01 Relay control board Clasp 2 Not...

Page 9: ...es to the function settings used to control the indoor unit according to the installation conditions Incorrect settings can cause the indoor unit to malfunction After the power is turned on perform the FUNCTION SETTING according to the installation conditions using the remote controller The settings may be selected between the following two Function Number or Setting Value Settings will not be cha...

Page 10: ...the FUNCTION SETTING be sure to turn off the power and turn it on again 13 2 Temperature correction NOTE When changing Function 95 perform this setting before other Room temp control settings Function 30 31 92 93 If Function 95 is not set first Room temperature control settings Function 30 31 92 93 will be reset and you must re do them again Heat Insulation condition building insulation Heat insul...

Page 11: ...r to the operating manual 1 Stop the air conditioner operation 2 Press the MODE button and the FAN button simultaneously for 2 seconds or more to start the test run Test run display 3 Press the START STOP button to stop the test run 15 CUSTOMER GUIDANCE Explain the following to the customer in accordance with the operating manual 1 Starting and stopping method operation switching temperature adjus...

Page 12: ...rip detection 9 5 Compressor rotor position detection error 9 7 Outdoor unit fan motor error 9 9 4 way valve error 10 1 Discharge temp error 10 3 Compressor temp error 10 4 High pressure error 10 5 Low pressure error 13 2 Branch boxes error Flexible Multi Display mode 0 5s ON 0 5s OFF 0 1s ON 0 1s OFF Number of flashing Troubleshooting with the indoor unit display OPERATION indicator green TIMER i...

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