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SPLIT SYSTEM Air Conditioners

Installation manual

2

CONTENTS

1. SAFETY CONSIDERATIONS ..........................................2

2. BEFORE INSTALLATION.................................................3

3. SELECTING INSTALLATION SITE ..................................4

4. PREPARATIONS BEFORE INSTALLATION........................ 5

5. INDOOR UNIT INSTALLATION........................................6

6. REFRIGERANT PIPING WORK ......................................7

7. DRAIN PIPING WORK.....................................................9

8. ELECTRIC WIRING WORK...........................................10

9. WIRING EXAMPLE AND HOW TO SET THE REMOTE 

CONTROLLER...............................................................10

10. ATTACHING THE SUCTION GRILLE, THE DECORATION 

PANELS AND THE PROTECTION NET ........................12

11. FIELD SETTING ............................................................13

12. TEST OPERATION ........................................................14

1.

SAFETY CONSIDERATIONS

Please read these “SAFETY CONSIDERATIONS” carefully 
before installing air conditioning equipment and be sure to 
install it correctly. After completing the installation, make sure 
that the unit operates properly during the start-up operation.
Please instruct the customer on how to operate the unit and 
keep it maintained.
Also, inform customers that they should store this installation 
manual along with the operation manual for future reference.
This air conditioner comes under the term “appliances not 
accessible to the general public”.

Meaning of danger, warning, caution and note symbols.

DANGER

  ...............Indicates an imminently hazardous 

situation which, if not avoided, will 
result in death or serious injury.

WARNING

  .............Indicates a potentially hazardous situ-

ation which, if not avoided, could result 
in death or serious injury.

CAUTION

  ...............Indicates a potentially hazardous situa-

tion which, if not avoided, may result in 
minor or moderate injury. It may also be 
sued to alert against unsafe practices.

NOTE

 .....................Indicates situation that may result in 

equipment or property-damage-only 
accidents.

DANGER

• Do not ground the unit to water pipes, telephone wires or 

lightning rods as incomplete grounding could cause a 
severe shock hazard resulting in severe injury or death, 
and to gas pipes because a gas leak could result in an 
explosion which could lead to severe injury or death.

• Do not install unit in an area where flammable materials 

are present due to risk of explosion resulting in serious 
injury or death.

• Refrigerant gas is heavier than air and displaces oxygen. 

A massive leak could lead to oxygen depletion, espe-
cially in basements, and an asphyxiation hazard could 
occur leading to serious injury or death.

• If the refrigerant gas leaks during installation, ventilate 

the area immediately.

Refrigerant gas may produce toxic gas if it comes in contact 
with fire such as from a fan, heater, stove or cooking device. 
Exposure to this gas could result in severe injury or death.

• After completing the installation work, check that the 

refrigerant gas does not leak.

Refrigerant gas may produce toxic gas if it comes in contact 
with fire such as from a fan, heater, stove or cooking device. 
Exposure to this gas could result in severe injury or death.

• Safely dispose of the packing materials.

Packing materials, such as nails and other metal or wooden 
parts, may cause stabs or other injuries. Tear apart and 
throw away plastic packaging bags so that children will not 
play with them. Children playing with plastic bags face the 
danger of death by suffocation.

WARNING

• Ask your dealer or qualified personnel to carry out 

installation work. Do not try to install the air conditioner 
by yourself.

Improper installation may result in water leakage, electric 
shocks or fire.

• Perform installation work in accordance with this instal-

lation manual.

Improper installation may result in water leakage, electric 
shocks or fire.

• Be sure to use only the specified accessories and parts 

for installation work.

Failure to use the specified parts may result in water leakage, 
electric shocks, fire or the unit falling.

• Install the air conditioner on a foundation strong enough 

to withstand the weight of the unit.

A foundation of insufficient strength may result in the equip-
ment falling and causing injuries.

• Carry out the specified installation work after consider-

ing strong winds, typhoons or earthquakes.

Improper installation work may result in the equipment falling 
and causing accidents.

• Make sure that a separate power supply circuit is pro-

vided for this unit and that all electrical work is carried 
out by qualified personnel according to local laws and 
regulations and this installation manual.

An insufficient power supply capacity or improper electrical 
construction may lead to electric shocks or fire.

• Make sure that all wiring is secured, the specified wires 

are used, and no external forces act on the terminal con-
nections or wires.

Improper connections or installation may result in fire.

• When wiring the power supply and connecting the remote 

controller wire and transmission wire, position the wires 
so that the control box lid can be securely fastened.

Improper positioning of the control box lid may result in elec-
tric shocks, fire or the terminals overheating.

Summary of Contents for FXHQ12MVJU

Page 1: ...U FXHQ24MVJU FXHQ36MVJU SYSTEM Inverter Air Conditioners INSTALLATION MANUAL Read these instructions carefully before installation Keep this manual in a handy place for future reference This manual sh...

Page 2: ...ly Refrigerant gas may produce toxic gas if it comes in contact with fire such as from a fan heater stove or cooking device Exposure to this gas could result in severe injury or death After completing...

Page 3: ...ng distance can result shorter than expected in rooms with elec tronic fluorescent lamps inverter or rapid start types Install the indoor unit as far away from fluorescent lamps as possible In a domes...

Page 4: ...lammable materials are present due to risk of explosion resulting in serious injury or death WARNING If the supporting structural members are not strong enough to take the unit s weight the unit could...

Page 5: ...unit 3 1 Detach the suction grille Slide the locking knobs 2 on the suction grille inward direction of arrows and lift upwards Refer to Fig 1 With the suction grille open remove the suction grille for...

Page 6: ...e sure to use the provided accessories and specified parts designated by our company 1 Secure the hanger brackets to the suspension bolts Refer to Fig 10 NOTE To ensure they are safely secured use the...

Page 7: ...oximately 250 F so use insulation pipe cover which is sufficiently resistant Also in cases where the temperature and humidity of the refrigerant pipe sections might exceed 86 F or RH 80 reinforce the...

Page 8: ...asten both ends with the clamps 4 Refer to Fig 16 Wrap the small sealing pad 9 only around the insulation for the joints on the gas piping side Refer to Fig 16 1 For piping facing back Remove the rear...

Page 9: ...the drain socket and securely attach the metal clamp bracket inside the gray tape area on the inserted tip of the drain pipe Refer to Fig 22 Screw the screws on the metal clamp bracket until there is...

Page 10: ...sion wire between indoor out door units and between the indoor unit and the remote con troller wire are as follows 1 Outdoor unit Indoor unit Max 3280 ft Total wire length 6560 ft 2 Indoor unit Remote...

Page 11: ...result in overheating and in worse case result in electric shock or fire CAUTION To avoid a short circuit in the electric parts box be sure to apply sealing material or putty not included to the wiri...

Page 12: ...TION GRILLE THE DECORATION PANELS AND THE PROTECTION NET Once wiring is complete firmly attach the control box lid the suction grille the decoration panels and the protection net in the order opposite...

Page 13: ...the upper part The remote controller PC board is attached to the upper part of remote controller Refer to Fig 35 2 Turn the MAIN SUB changeover switch on one of the 2 remote controllers PC boards to...

Page 14: ...ill be displayed for a few seconds on the remote controller immediately after the power is turned on This display indicates that the remote controller is being checked to see whether it is ok or not a...

Page 15: ...s fault The remote controller thermistor does not function but the system thermo run is possible E3 High pressure abnormal outdoor unit E4 Low pressure abnormal outdoor unit ON OFF TEST SWING TEST E5...

Page 16: ...0510 FS 3PN06240 1E EM04A049B...

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