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SPLIT SYSTEM Air Conditioners
MODELS
Ceiling suspended type
FHQ18PVJU
FHQ24PVJU
FHQ30PVJU
INSTALLATION MANUAL
English
Français
Read these instructions carefully before installation.
Keep this manual in a handy place for future reference.
This manual should be left with the equipment owner.
Lire soigneusement ces instructions avant I’installation.
Concerver ce manuel à portée de main pour référence
ultérieure.
Ce manuel doit être donné au propriétaire de l’équipement.
Lea cuidadosamente estas instrucciones antes de instalar.
Guarde este manual en un lugar a mano para leer en caso
de tener alguna duda.
Este manual debe permanecer con el propietario del
equipo.
Español
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SPLIT SYSTEM Air Conditioners Installation manual
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. ELECTROLLER ………………………………………… 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 ………………………………………… 12
12. TEST OPERATION ……………………………………… 13
SAFETY CONSIDERATIONS1.
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 iminenfl y hazardous situ-
ation which, if not avoided, will result
in death or serious injury.
WARNING …………lndicates a potentially hazardous situ-
ation which, if not avoided, could
result in death or serious injury.
CAUTION …………lndicates a potentially hazardous situ-
ation which, if not avoided,may resulf
in minor or moderate injury. lt may
also be sued to alert against unsafe
practices.
NOTE ………………lndicates situation that may result in
equipment or property-damage-only
accidents.
DANGER
Do not ground units to water pipes, telephone wires or •
lightning rods because 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 fl ammable 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, especially 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 fi re 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 fi re 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 qualifi ed 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 fi re.
Perform installation work in accordance with this instal- •
lation manual.
Improper installation may result in water leakage, electric
shocks or fi re.
Be sure to use only the specifi ed accessories and parts •
for installation work.
Failure to use the specifi ed parts may result in water leakage,
electric shocks, fi re or the unit falling.
Install the air conditioner on a foundation strong enough •
to withstand the weight of the unit.
A foundation of insuffi cient strength may result in the equipment falling and causing injuries.
Carry out the specifi ed 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 qualifi ed personnel according to local laws and
regulations and this installation manual.
An insuffi cient power supply capacity or improper electrical
construction may lead to electric shocks or fi re.
Make sure that all wiring is secured, the specifi ed wires •
are used, and no external forces act on the terminal connections or wires.
Improper connections or installation may result in fi re.
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 electric shocks, fi re or the terminals overheating.
2
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Page 3
Before touching electrical parts, turn off the unit. •
Do not touch the switch with wet fi ngers. •
Touching a switch with wet fi ngers can cause electric shock.
Be sure to install an earth leakage breaker. •
Failure to install an earth leakage breaker may result in
electric shocks, or fi re.
Do not install the air conditioner in the following locations : •
(a) where a mineral oil mist or an oil spray or vapor is pro-
duced, for example in a kitchen.
Plastic parts may deteriorate and fall off or result in
water leakage.
(b) where corrosive gas, such as sulfurous acid gas, is pro-
duced.
Corroding copper pipes or soldered parts may result in
refrigerant leakage.
(c) near machinery emitting electromagnetic waves.
Electromagnetic waves may disturb the operation of the
control system and result in a malfunction of the equipment.
Refrigerant pipes may be very hot or very cold during or •
immediately after operation.
Touching them could result in burns or frostbite. To avoid
injury give the pipes time to return to normal temperature or,
if you must touch them, be sure to wear proper gloves.
CAUTION
Install drain pipe in order to ensure proper drainage and •
do the thermal insulation of the pipe in order to prevent
condensate.
Improper drain pipe may result in water leakage and property
damage.
Be very careful about product transportation. •
Some products use PP bands for packaging. Do not use any
PP bands for a means of transportation. It is dangerous.
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. If children play with a plastic
bag which was not torn apart, they face the risk of suffocation.
Do not turn off the power immediately after stopping •
operation.
Always wait at least 5 minutes before turning off the power.
Otherwise, water leakage and trouble may occur.
Make sure to provide for adequate measures in order •
to prevent that the outdoor unit be used as a shelter by
small animals.
Small animals making contact with electrical parts can cause
malfunctions, smoke or fi re. Please instruct the customer to
keep the area around the unit clean.
NOTE
Install the indoor and outdoor units, power supply wire •
and transmission wire at least 3.5 ft. away from televisions
or radios in order to prevent image interference or noise.
(Depending on the radio waves, a distance of 3.5 ft. may not
be suffi cient enough to eliminate the noise.)
Remote controller (wireless kit) transmitting distance •
can result shorter than expected in rooms with electronic fl uorescent lamps. (inverter or rapid start types)
Install the indoor unit as far away from fl uorescent lamps as
possible.
In a domestic environment this product may cause radio •
interference in which case the user may be required to
take adequate measures.
Dismantling of the unit, treatment of the refrigerant, oil •
and eventual other parts, should be done in accordance
with the relevant local and national regulations.
BEFORE INSTALLATION2.
When moving the unit while removing it from the pack- •
ing case, be sure to lift it by the four hanger brackets.
Avoid putting any pressure on other parts especially the
refrigerant piping.
Be sure to check the type of refrigerant to be used before •
installing the unit. (Using an incorrect refrigerant will prevent
normal operation of the unit.)
The accessories needed for installation must be retained in •
your custody until the installation work is completed. Do not
discard them!
Decide upon a line of transport. •
Leave the unit inside its packaging while moving, until reach- •
ing the installation site. Where unpacking is unavoidable, use
a sling of soft material or protective plates together with a
rope when lifting, to avoid damage or scratches to the unit.
When selecting installation site, refer to the paper pattern. •
For the installation of an outdoor unit, refer to the installa- •
tion manual attached to the outdoor unit.
Do not install or operate the unit in rooms mentioned below. •
Laden with mineral oil, or fi lled with oil vapor or spray •
like in kitchens. (Plastic parts may deteriorate which
could eventually cause the unit to fall out of place, or
could lead to leaks.)
Where corrosive gas like sulfurous gas exists. •
(Copper tubing and brazed spots may corrode which •
could eventually lead to refrigerant leaks.)
Where machines can generate electromagnetic •
waves. (Control system may malfunction.)
Where the air contains high levels of salt such as that •
near the ocean and where voltage fl uctuates greatly
such as that in factories. Also in vehicles or vessels.
This unit, both indoor and outdoor, is suitable for installation •
in a commercial and light industrial environment.
If installed as a household appliance it could cause electromagnetic interference.
WARNING
Entrust installation to the place of purchase or a qualifi ed •
person. Improper installation could lead to leak and, in worse
cases, electric shock of fi re.
Use of unspecifi ed parts could lead to the unit falling, leaks •
and, in worse cases, electric shock or fi re.
NOTE
Be sure to read this manual before installing the indoor unit. •
Be sure to mount an air fi lter (part to be procured in the fi eld) in •
the suction air passage in order to prevent water leaking, etc.
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ACCESSORIES2-1
Check the following accessories are included with your unit.
Name (1) Drain pipe
Quantity 1 pc. 1 pc. 8 pcs. 9 pcs.
Shape
(2) Metal
clamp
(3) Washer for
hanger bracket
(4) Clamp
Is the unit safely grounded? It may result in electric shock.
Is wiring size according to
specifi cations?
Is something blocking the air
outlet or inlet of either the
indoor or outdoor units?
Are refrigerant piping length
and additional refrigerant
charge noted down?
The unit may malfunction or
the components burn out.
It may result in insuffi cient
cooling.
The refrigerant charge in the
system is not clear.
Name
Quantity 1 pc. 1 each 1 each
Shape
Name (10) Resin bush
Quantity 1 pc. 3 pcs.
Shape
(5) Paper pattern
for installation
Insulation pipe
cover
(6) For gas pipe
(7) For liquid pipe
(11) Insulating
tube
For wire
Sealing pad
(8) Large
(9) Small
(Other)
Operation manual •
Installation manual •
OPTIONAL ACCESSORIES2-2
The remote controller are required for this indoor unit in Table 1. •
These are 2 types of remote controllers : wired and wireless. •
Select a remote controller according to customer request
and install in an appropriate place.
Table 1
Remote controller
Wired type BRC1C71
Wireless type BRC7E83
NOTE
If you wish to use a remote controller that is not listed in “Table •
1” on page 4, select a suitable remote controller after consulting catalogs and technical materials.
FOR THE FOLLOWING ITEMS, TAKE SPECIAL
CARE DURING CONSTRUCTION AND CHECK
AFTER INSTALLATION IS FINISHED.
a. Items to be checked after completion of work
Items to be checked
Are the indoor and outdoor
unit fi xed fi rmly?
Is the gas leak test fi nished?
Is the unit fully insulated? Condensate water may drip.
Does drainage fl ow smoothly? Condensate water may drip.
Does the power supply voltage correspond to that shown
on the name plate?
Are wiring and piping correct?
If not properly done, what is
likely to occur
The units may drop, vibrate or
make noise.
It may result in insuffi cient
cooling.
The unit may malfunction or
the components burn out.
The unit may malfunction or
the components burn out.
Check
b. Items to be checked at time of delivery
Also review the “SAFETY CONSIDERATIONS”
∗
Items to be checked
Did you explain about operations while showing the opera-
tion manual to your customer?
Did you hand the instruction manual over to your customer?
Check
NOTE TO THE INSTALLER2-3
Be sure to instruct customers how to properly operate the unit
(especially cleaning fi lters, operating different functions, and
adjusting the temperature) by having them carry out operations
themselves while looking at the manual.
SELECTING INSTALLATION SITE3.
Please attach additional insulation pipe cover to the unit body
when it is believed that the relative humidity in the ceiling
exceeds 80%. Use glass wool, polyethylene foam, or similar
with a thickness of 3/8 in.. or more as insulation pipe cover.
Select an installation site where the following conditions (1)
are fulfi lled and that meets your customer’s approval.
Where optimum air distribution can be ensured. •
Where nothing blocks air passage. •
Where condensate can be properly drained. •
Where the ceiling is strong enough to bear the indoor unit •
weight.
Where the false ceiling is not noticeably on an incline. •
Where suffi cient clearance for maintenance and service •
can be ensured.
DANGER
Do not install unit in an area where fl ammable materials are •
present due to the risk 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 fall out of place and
cause serious injury.
NOTE
When a margin is in the space of the •
maintenance work will become still easier if it vacates 7 7/8 in.
or more.
section, service and
∗
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1 3/16 or more 1 3/16 or more
Air outlet
Required service
space
Air inlet
Obstruction
Floor
∗∗
12 or more
(Length : in.)
Where pipe between indoor and outdoor units is possible •
within the allowable limit.
(Refer to the installation manual for the outdoor unit.)
Install the indoor and outdoor units, power wire and •
connecting wires at least 3.5 ft. away from televisions or
radios in order to prevent image interference or noise.
(Depending on the radio waves, a distance of 3.5 ft. may
not be suffi cient enough to eliminate the noise.)
Use suspension bolts for installation. Check whether (2)
the ceiling is strong enough to support the weight of
the unit or not. If there is a risk, reinforce the ceiling
before installing the unit.
(Installation pitch is marked on the paper pattern for installation. Refer to it to check for points requiring reinforcing.)
This product may be installed on ceilings up to 10.6 ft. (3)
from the fl oor.
A direction of installation.(4)
Refrigerant piping : the rear side, right side or upper part. •
Wiring : only the rear side. •
Drain piping : the rear right side or the right side. •
(As the rear left, installation is impossible.)
PREPARATIONS BEFORE INSTALLATION4.
Relation of holes for indoor unit, suspension bolt posi-(1)
tion, piping and wiring.
Rear side pipe hole
3 3/4
6 1/4
Conduit
hole
Drain pipe hole
7 1/4
6 1/4
Top gas pipe hole
Suspension bolt (× 4)
Top liquid pipe hole
(length : in.)
62 5/8 (Indoor unit)
61 (Suspension bolt pitch)
8 1/4
False ceiling view
bolt pitch)
10 1/4
(Suspension
26 3/4 (Indoor unit)
Front view
Air outlet
Wiring hole
26 1/8
6
22
25 3/4
27 11/16
27 3/16
24 5/8
5 5/8
Make holes for suspension bolts, refrigerant and drain (2)
pipe, and wire.
Refer to the paper pattern for installation. •
Select the location for each of holes and open the holes in •
the ceiling.
Remove the parts from the indoor unit.(3)
(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- •
ward, holding on to the rear tabs (×2) on the suction grille.
(Refer to Fig. 2)
Knob
Ta b
(3-2)
Remove the decoration panels (left and right) and the pro-
Suction grille
Fig. 1
Suction grille
Fig. 2
tection net.
After removing the securing screws for the decoration •
panels (one each), pull them forward (in the direction of
the arrow) and remove them. (Refer to Fig. 3)
Remove the securing screws for the protection net. •
(Refer to Fig. 3)
Protection net
securing screws (M4)
Decoration panel
Decoration panel
securing screw
(M4)
Decoration panel
securing screws (M4)
Decoration
panel
Fig. 3
Raise one side of the protection net upwards (in the direc- •
tion of the arrow (i)) and remove back (the arrow (ii)).
(Refer to Fig. 4, 5)
Take out the accessories. •
Accessories
Decoration panel
(ii)
(i)
Protection net
Decoration
panel
Fig. 4
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If it raises too much,
a hook stops catching
and falling out.
(ii)
Protection net
(i)
Hook
NOTE
Use a hole-in anchor for existing ceilings, and a sunken insert, •
sunken anchor or other fi eld supplied parts for new ceilings to
reinforce the ceiling to bear the weight of the unit. Adjust clearance from the ceiling before proceeding further.
Ceiling slab
Fig. 5
(3-3)
Remove the rear metal plate for transmission wire, remote
controller wire and refrigerant pipe.
It is necessary to drill the knock out hole in the removable •
part. Knock down several times with a punch and hammer and remove the removable part with pliers.
When setting the refrigerant pipe to the rear side, remove •
the securing screws and the metal plate. (Refer to Fig. 6).
After removing, attach the resin bush
(Refer to Fig. 25)
Removable part
(metal plate)
Metal plate
securing
screw (M4)
If setting the refrigerant pipe to
the rear side, remove this metal plate.
(3-4)
Remove the hanger brackets.
If setting the drain pipe to the
right side, block up the hole for
drain pipe with pate etc.
Fig. 6
Loosen the 2 bolts (M8) used to attach the hanger brack- •
ets which are on each side (4 places left and right) to
within 3/8 in.. (Refer to Fig. 7, 8)
After removing the securing screws (M5) for the hanger •
brackets which are on the rear side, pull the hanger
brackets back (in the direction of the arrow), and remove
them. (Refer to Fig. 8)
Length of loosening
should be less than 3/8
3/8 or less
Indoor unit
Anchor
1–2 3/16
False ceiling
All the above parts are field supplied.
Fig. 9
Suspension bolt
(Length : in.)
INDOOR UNIT INSTALLATION5.
It may be easier to attach accessory parts before installing
the indoor unit. Therefore, please also read the instruction
manuals which are provided with the accessory parts.
As for the parts to be used for installation work, be sure to use
the provided accessories and specifi ed parts designated by our
company.
Secure the hanger brackets to the suspension bolts. (1)
(Refer to Fig. 10)
NOTE
To ensure they are safely secured, use the included washers, •
and secure them with double nuts to make sure.
Lift the indoor unit’s main body, insert the bolts (M8) (2)
for the hanger brackets into the attachment part on the
hanger brackets, while sliding the main body from the
front. (Refer to Fig. 11)
Fasten the bolts for the hanger brackets (M8) securely (3)
in 4 places, left and right. (Refer to Fig. 11)
Replace the screws for the hanger brackets which had (4)
been removed (M5) securely in 2 places left and right.
This is necessary to prevent any forward and back slide
in the main body of the indoor unit. (Refer to Fig. 11)
Nut (Field supplied)
Washer (3) (attached)
Fig. 7
Hanger bracket
fixing screw (M5)
Hanger bracket
setting bolt (M8)
Hanger bracket
Hanger bracket
Attach the suspension bolts. (Use suspension bolts (4)
which are W3/8 or M8-M10 in size.)
Adjust the distance of the suspension bolts from the ceiling in •
advance. (Refer to Fig. 9)
(Length : in.)
Fig. 8
Double nuts
(Field supplied)
Hanger bracket
Hanger bracket
Fig. 11
Fig. 10
Hanger bracket
setting bolt (M8)
Hanger bracket
fixing screw (M5)
Attachment
part
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Page 7
When hanging the indoor unit main body, be sure to (5)
use a level or a plastic tube with water in it to make sure
the drain piping is set either level or slightly tilted, in
order to ensure proper drainage. (Refer to Fig. 12)
A
1˚ or less
B
1˚ or less
A.B
1˚ or less
Fig. 12
A.When the drain piping is tilted to the right, or to the right
and back.
Place it level, or tilt it slightly to the right or the back. (1° or less.)
B.When the drain piping is tilted to the left, or to the left and
back.
Place it level, or tilt it slightly to the left or the back. (1° or less.)
CAUTION
Setting the unit at an angle opposite to the drain piping might •
cause a water leakage.
Before refrigerant pipe work, check which type of refrig- •
erant is used.
Proper operation is not possible if the types of refrigerant are not the same.
CONNECTING THE REFRIGERANT PIPE6-2
The outdoor unit is charged with refrigerant. •
Use copper alloy seamless pipes. •
Be sure to use both a spanner and torque wrench together, •
as shown in the drawing, when connecting or disconnecting
pipes to/from the unit. (Refer to Fig. 13)
Refer to “Table 2” to determine the proper tightening torque. •
Refer to “Table 2” for the dimensions of fl are shape. •
When connecting the fl are nut, coat the fl are section with •
ester oil or ether oil, rotate three or four times fi rst, then
screw in. (Refer to Fig. 14)
Torque wrench
Pipe union
Flare nut
Spanner
Fig. 13
CAUTION
Be careful for oil not to adhere to any portions other than a •
fl are part. If oil adhere to resin parts etc., there is a possibility of damaging by deterioration.
REFRIGERANT PIPING WORK6.
DANGER
Refrigerant gas may produce toxic gas if it comes in contact •
with fi re such as from a fan heater, stove or cooking device.
Exposure to this gas could cause severe injury or death.
CAUTION
Use a pipe cutter and fl are suitable for the type of refrig- •
erant.
To prevent dust, moisture or other foreign matter from infi l- •
trating the tube, either pinch the end or cover it with tape.
Do not allow anything other than the designated refrig- •
erant to get mixed into the refrigerant circuit, such as air,
etc. If any refrigerant gas leaks while working on the
unit, ventilate the room thoroughly right away.
GENERAL INSTRUCTIONS6-1
For refrigerant pipe of outdoor units, see the installation •
manual attached to the outdoor unit.
Execute thermal insulation work completely on both •
sides of the gas pipe and the liquid pipe.
Otherwise, a water leakage can result sometimes.
(The temperature of the gas pipe can reach up to
approximately 250ºF, so use insulation pipe cover
which is suffi ciently resistant.)
Also, in cases where the temperature and humidity of •
the refrigerant pipe sections might exceed 86ºF or RH
80%, reinforce the thermal insulation. (3/4 in. or thicker)
Condensate may form on the surface of the insulation
pipe cover.
Ester oil or ether oil.
Fig. 14
NOTE
Use the fl are nut included with the unit main body. •
Table 2
Pipe size
(in.)
φ
φ
Tightening torque
(ft. lbf)
3/8 24.1-29.4 0.504-0.520
5/8 45.6-55.6 0.760-0.776
Flare dimensions A
(in.)
Flare shape (in.)
45˚±2˚
R0.016-0.031
A
90˚± 2˚
CAUTION
Overtightening may damage the fl are and cause a refrigerant •
leakage
Not recommended but in case of emergency
You must use a torque wrench, but if you are obliged to install
the unit without a torque wrench, you may follow the installation method mentioned below.
When you keep on tightening the fl are nut with a spanner,
there is a point where the tightening torque suddenly
increases. From that position, further tighten the fl are nut
the angle shown below :
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Page 8
Table 3
Pipe size
φ
φ
Further tightening angle
(in.)
3/8 60 to 90 degrees Approx. 7 7/8
5/8 30 to 60 degrees Approx. 11 13/16
Recommended arm length of tool
(in.)
After the work is fi nished, make sure to check that there
is no gas leak.
BRAZING REFRIGERANT PIPING6-3
Procedure for thermal insulation of gas-side pipe
Insulation pipe cover
for gas pipe (6)
Flare nut connection
Orient so that the end of
the wrapped insulation
pipe cover is facing up
Insulation pipe cover
(Locally procured)
Insulation pipe
cover (main unit)
Attach to base
Main unit
Clamp (4)
Wind around the
pipe, beginning at
the base.
Small sealing
pad (9)
DANGER
CAUTION TO BE TAKEN WHEN BRAZING REFRIGERANT
PIPING
“Do not use fl ux when brazing refrigerant pipe. Therefore, use
the phosphor copper brazing fi ller metal (BCuP) which does not
require fl ux.”
(Flux has an extremely negative effect on refrigerant piping systems. For instance, if chlorine based fl ux is used, it will cause
pipe corrosion. If the fl ux contains fl uorine, it will damage the
refrigerant oil.)
Before brazing local refrigerant pipe, nitrogen gas shall be •
blown through the pipe to expel air from the pipe.
If you brazing is done without nitrogen gas blowing, a large
amount of oxide fi lm develops inside the pipe, and could
cause system malfunction.
When brazing the refrigerant pipe, only begin brazing after •
having carried out nitrogen substitution or while inserting
nitrogen into the refrigerant pipe. Once this is done, connect
the indoor unit with a fl ared or a fl anged connection.
Nitrogen should be set to 2.9 psi with a pressure-reducing •
valve if brazing while inserting nitrogen into the pipe.
(Refer to Fig. 15)
Pressure-reducing
Refrigerant pipe
Part to be
brazed
Nitrogen
Taping
hands valve
Fig. 15
valve
Nitrogen
DANGER
Use of oxygen may cause an explosion resulting in serious •
injury or death. Only use nitrogen gas.
CAUTION
Be sure to insulate any fi eld piping all the way to the piping •
connection inside the unit. Any exposed piping may cause
condensate or a burn if touched.
PIPING INSULATION6-4
Make absolutely sure to execute thermal insulation works on •
the pipe-connecting section after checking gas leakage by
thoroughly studying the following fi gure and using the insulation pipe cover (6) and (7). (Fasten 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)
Insulation pipe cover for gas pipe (6)
Gas pipe
Liquid pipe
Insulation pipe cover for liquid pipe (7)
Clamp (4) (× 4)
Attach to the bottom
(For both gas pipe and liquid pipe)
Procedure for thermal insulation of liquid-side pipe
Insulation pipe cover for
liquid pipe (7)
Flare nut connection
Orient so that the end of
the wrapped insulation
material is facing up
Insulation pipe cover
(Locally procured)
Insulation pipe cover (main unit)
Attach to base
Main unit
Clamp (4)
Fig. 16
For piping facing back.(1)
Remove the rear metal plate for pipe. (Refer to Fig. 17)
The fi gure of the direction of back shows when both the pip- •
ing and drain pipe are set backward.
When setting the piping to face up or right, attach the rear
metal plate for refrigerant pipe and plug a hole for drain pipe.
(See “4 PREPARATIONS BEFORE INSTALLATION” (3-3) on
page 6)
For piping facing up.(2)
When setting the piping to face up, the L-shaped branch •
pipe kit sold separately is required.
Removing the top penetration lid and use the L-shaped branch •
pipe kit sold separately to set the pipe. (Refer to Fig. 18, 19)
For piping facing right.(3)
Cut out a slit hole on the decoration panel (right) and set the •
pipe. (Refer to Fig. 17)
Right-facing
refrigerant
piping
Right-facing drain pipe
Decoration panel (right) removable part
If only setting the drain pipe to
face right, cut this section only.
Rear-facing
refrigerant pipe
Rear right-facing
drain pipe
Fig. 17
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Page 9
Top plate
Good
Tilt down
Cut out
Top penetration
lid clamp section
Top penetration lid
This hole not using it.
Fig. 18 (A figure from an inside bottom)
Upward-facing
refrigerant pipe
L-shaped branch pipe
kit (Optional accessories)
Fig. 19
Thermistor lead line
Swing motor
lead line
Wrong
Do not lift
Fig. 21
Make sure there
is no slack
Make sure it is
not in the water
CAUTION
Water accumulating in the drain piping can cause the drain to •
clog.
Be sure to use the drain pipe (1) and metal clamp (2). •
Also, insert the drain pipe completely into 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 5/
32 in. left. (Pay attention to the direction of the attachment to
prevent the metal clamp bracket from coming into contact
with the suction grille.) (Refer to Fig. 23)
Metal clamp (2)
Taping area (Gray)
Fig. 22
Drain pipe (1)
Fig. 20 (A figure from an inside bottom)
When piping is complete, cut the removed penetration lid into •
the shape of the pipe using scissors and attach.
As when before removing the top penetration lid, secure the
lead lines for the swing motor and thermistor by passing them
through the clamp section on the top penetration lid.
(Refer to Fig. 18, 20)
When doing this, block any gaps between the pipe penetra- •
tion lid and the pipes using putty to prevent dust from entering the indoor unit.
DRAIN PIPING WORK7.
Carry out the drain piping.(1)
Make sure piping provides proper drainage. •
You can select whether to bring the drain piping out from the •
rear right or right. For rear right-facing and right-facing situations, refer to “6. REFRIGERANT PIPING WORK” on page 7.
Make sure the pipe diameter is the same or bigger than the •
branch piping. (vinyl-chloride piping, nominal diameter 1 in.,
external diameter 1 1/4 in.)
Make sure the piping is short, has at least a 1/100 slope, and •
can prevent air pockets from forming. (Refer to Fig. 21)
Do not allow any slack to gather in the drain pipe inside the •
indoor unit.
(Slack in the drain pipe can cause the suction grille to break.)
5/32 or less
Large sealing pad (8)
Metal clamp (2)
< Facing rear right or right >
Fig. 23
(Length : in.)
Insulate the metal clamp bracket and drain pipe from the bot- •
tom using the large sealing pad (8). (Refer to Fig. 23)
Be sure to insulate all drain piping running indoors. •
Check to make sure the water fl ows smoothly after pip-(2)
ing is complete.
Slowly pour 600 ml of drain-checking water into the drain pan •
through the air outlet.
Plastic container for pouring
Make sure not to splash the water.
Air outlet
Fig. 24
CAUTION
Drain piping connections : •
Do not connect the drain piping directly to sewage pipes that
smell of ammonia. The ammonia in the sewage might enter
the indoor unit through the drain pipes and corrode the heat
exchanger.
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Page 10
Keep in mind that it will become the cause of getting drain •
pipe blocked if water collects on drain pipe.
WIRING EXAMPLE AND HOW TO SET 9.
THE REMOTE CONTROLLER
ELECTRIC WIRING WORK 8.
GENERAL INSTRUCTIONS 8-1
All fi eld supplied parts and materials and electric works must •
conform to local codes.
Use copper wire only. •
For electric wiring work, refer to also “Wiring diagram label” •
attached to the control box lid.
For remote controller wiring details, refer to the installation •
manual attached to the remote controller.
All wires must be performed by an authorized electrician. •
An earth leakage circuit breaker capable of shutting down •
power supply to the entire system must be installed.
Refer to the installation manual attached to the outdoor unit •
for the size of power supply wiring connected to the outdoor
unit, the capacity of the circuit breaker and switch, and wiring
instructions.
Be sure to ground the air conditioner. •
DANGER
Do not ground units to water pipes, telephone wires or •
lightning rods because 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.
ELECTRICAL CHARACTERISTICS8-2
Units Power supply Fan motor
Model Hz Volts
FHQ18PVJU
FHQ24PVJU 1.3 15 130 1.0
FHQ30PVJU 1.3 15 130 1.0
60 208-230V
MCA : Min. Circuit Amps (A); MFA : Max. Fuse Amps (A)
W: Fan Motor Rated Output (W); FLA : Full Load Amps (A)
Voltage
range
Max. 253V
Min. 187V
MCA MFA W FLA
1.3 15 130 1.0
HOW TO CONNECT WIRES9-1
CAUTION
Even if the control box lid is removed, pull the remote control- •
ler wire, transmission wire and the power supply wire inside
the unit using conduits for each, so that the wires do not come
into contact with the opening section of the metal casing.
Pass conduits through the wall and secure along with the •
refrigerant pipe in order to prevent external pressure being
applied to transmission wire and power supply wire.
To a voi d s ho r t cir cu it s i n t he el ec tr ic p a r ts bo x, b e sur e to a p pl y •
the sealing material or putty (not included) to the wiring hole to
prevent the infi ltration of water, insects or other small creatures.
Arrange the wires and fi x a lid fi rmly so that the lid does not •
fl oat during wiring work.
Do not clamp remote controller wire and transmission wire •
together with power supply wire. Doing so may cause malfunction.
Remote controller wire, transmission wire and power supply •
wire should be located at least 5 in. from other electric wires.
Not following this guideline may result in malfunction due to
electrical noise.
<Method of wiring power supply, units and connecting remote controller wiring> (Refer to Fig. 26)
Attaching the resin bush •
Attach the resin bush (10) for remote controller wiring.
Installlation of conduit •
Insert the conduit for power supply wire in the conduit hole,
and fi x it with the lock nut.
Lock nut
Conduit hole
SPECIFICATIONS FOR FIELD SUPPLIED FUSES 8-3
AND WIRES
Power supply wiring
Model
FHQ18PVJU
FHQ30PVJU
Field fuses
15A
Size Wire Size
Wire size must
comply with
local codes.
Allowable length of transmission wire between indoor/outdoor
units and between the indoor unit and the remote controller wire
are as follows.
(1) Outdoor unit - Indoor unit : Max. 3280 ft.
(2) Indoor unit - Remote controller : Max. 1640 ft.
Remote controller wiring
Transmission wiring
Sheathed wire
(2 wires)
AWG 18-16 FHQ24PVJU
Power supply wire •
Holding the control box lid, loosen the 2 securing screws,
remove the control box lid, match up the phases on the power
supply terminal block inside (2P), and make the connections.
After this is done, use the attached clamp (4) to bind wire
between units to the anchor point. (Refer to Fig. 27)
Remote controller wire and transmission wire •
Holding the control box lid, loosen the 2 securing screws,
remove the control box lid.
Thread the remote controller wire and transmission wire
through the insulating tube (11) and secure with the clamp
(4), and cut off the insulating tube (11) to suitable length. Pull
the wires inside through resin bush and connect the wires to
the transmission terminal block (6P) inside the control box.
After connecting, use the clamp (4) to bind the remote controller wire together with the transmission wire to the anchor.
(Refer to Fig. 26, 27, 28)
10 English
Conduit
Resin bush (10)
Fig. 25
Page 11
Control box
Transmission
terminal block (6P)
Power supply
teminal block (2P)
Ground terminal
Refer to Fig. 27
Remote controller wire
and transmission wire
Power supply wire
Use the specifi ed electric wire. Connect the wire securely to •
the terminal. Lock the wire down without applying excessive
force to the terminal. (Tightening torque: 0.97 ft lbf ±10%)
Attach insulation sleeve
Gas pipe
Liquid pipe
Drain pipe
Fig. 26
Clamp (4)
Insulating
tube (11)
Control box lid
How to connect power supply
terminal block (2P)
Power supply wire
Clamp (4)
Fastener
Transmission
terminal block (6P)
Clamp (4)
Insulating tube (11)
Control box
lid secuing screw (2pcs.)
L 1
L 2
POWER SUPPLY
power supply
Fastener
Transmission wire
Clamp (4)
Fig. 27
P1 P2 F1 F2 T 1 T2
REMOTE
TRANSMISSION
CNTRL
WIRING
1 in.
Fig. 28
Conduit
Corking or Putty
Resin bush (10)
Ground wire
After securing the
cramp material
to the bracket,
cut off any extra
material.
Remote controller wire and
transmission wire
FORCED
OFF
Remote controller wire
In the insulating tube (11), it can let the remote controller wire •
and transmission wire pass to 2.
WARNING
Never connect power supply wiring to the terminal block for •
remote controller wiring as this could damage the entire system.
Use only specifi ed wire and connect wires to the terminal •
tightly. Be careful wires do not place external stress on terminals. Keep wires in neat order so as to not obstruct other
equipment. Make sure that the electric box lid fi ts tightly.
Incomplete connections could result in overheating and, in
worse case, result in electric shock or fi re.
Round crimp-style terminal
Connect wires of the
same gauge to both side.
Electric wire
2. Tightening torque for the terminal screws.
Use the correct screwdriver for tightening the terminal •
screws. If the blade of screwdriver is too small, the head
of the screw might be damaged, and the screw will not be
properly tightened.
If the terminal screws are tightened too hard, screws •
might be damaged.
Refer to the table below for the tightening torque of the •
terminal screws.
Table 4
Terminal Size
Transmission terminal block (6P) M3.5 0.58 – 0.72
Power supply terminal block (2P) M4 0.87 – 1.06
Ground terminal M4 0.87 – 1.06
Tightening torque
(ft-lbf)
3. Do not connect wires of different gauge to the same ground
terminal. Looseness in the connection may deteriorate protection.
4. Outside of the unit, keep transmission wire at least 5 in.
away from power supply wire. The equipment may malfunction if subjected to electrical (external) noise.
5. For remote controller wire, refer to the “INSTALLATION
MANUAL OF REMOTE CONTROLLER” attached to the
remote controller.
WIRING EXAMPLE 9-2
Fit the power supply wire of each unit with a switch and fuse •
as shown in the drawing.
COMPLETE SYSTEM EXAMPLE
Power supply
Main
switch
Outdoor unit
Power supply wire
Transmission wire
Switch
Fuse
NOTE
1. Use round crimp-style terminals for connecting wires to the
power supply terminal block.
If unavailable, observe the following points when wiring.
Do not connect wires of different gauge to the same •
power supply terminal.
(Looseness in the connection may cause overheating.)
Indoor unit
Remote controller
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Page 12
1. When using 1 remote controller for 1 indoor unit.
(Normal operation)
Power supply
208-230V
60Hz
L1 L2
Outdoor unit
Control box
IN/D OUT/D
F
1 F2 F1 F2
L1 L2 P1P
2
F1F2T1T
2
Indoor unit
P1P
2
Remote controller
2. When using 2 remote controllers for 1 indoor unit.
Power supply
208-230V
60Hz
L1 L2
Outdoor unit
Control box
IN/D OUT/D
1 F2 F1 F2
F
P1P2F1F2T1T
L1 L2
2
Hook
Hook
(ii)
(i)
(i)
Decoration
panel
(ii)
Protection net
(ii)
Indoor unit
P1P
2
P1P
2
For use with 2 remote controllers
NOTE
1. All transmission wires except for remote controller wire are
polarized and must match the terminal symbol.
2. A single switch can be used to supply power to units on the
same system. However, branch switches and branch circuit
breakers must be selected carefully.
3. Do not ground the equipment on gas pipes, water pipes or
lightning rods, or crossground with telephones. Improper
grounding could result in electric shock.
ATTACHING THE SUCTION GRILLE, 10.
THE DECORATION PANELS AND THE
PROTECTION NET
Once wiring is complete, fi rmly attach the control box lid, the
suction grille, the decoration panels and the protection net in the
order opposite to detachment.
Attaching the protection net •
Attach the protection net from the way of the hook (i), fi x 2
securing screws of the middle of the other side fi rst (ii), then
fi x the remaining securing screws (iii).
(iii)
Protection net
securing screws (M4)
Fig. 29
FIELD SETTING11.
Make sure the control box lids are closed on the indoor and
outdoor units, and turn on the power.
Field setting must be made from the remote controller in
accordance with the installation manual.
Setting can be made by changing the “Mode No.”, “FIRST •
CODE NO.”, and “SECOND CODE NO.”.
For setting and operation, refer to the “FIELD SETTING” in •
the installation manual of the remote controller.
Setting air fi lter sign11-1
Remote controllers are equiped with liquid crystal display air •
fi ler signs to display the time to clean air fi lters.
Change the SECOND CODE NO. according to “Table 5” •
depending on the amount of dirt or dust in the room.
(SECOND CODE NO. is factory set to “01” for air fi lter contamination-light.)
Table 5
Setting
Spacing time of
display air fi lter sign
Mode
(long life type)
Air fi lter contamination-light
Air fi lter contamination-heavy
Approx. 2500 hrs
10 (20) 0
Approx. 1250 hrs 02
<When using wireless remote controllers>
When using wireless remote controllers, wireless remote •
controller address setting is necessary. Refer to the installation manual attached to the wireless remote controller for
setting instructions.
No.
FIRST
CODE
NO.
SECOND
CODE
NO.
01
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Page 13
2 remote controllers control11-2
(Controlling 1 indoor unit by 2 remote controllers)
When using 2 remote controllers, one must be set to “MAIN” •
and the other to “SUB”.
MAIN/SUB CHANGEOVER
(1) Insert a
screw driver into the recess between the up-
per and lower part of remote controller and, working from
the 2 positions, pry off the upper part.
The remote controller PC board is attached to the upper
part of remote controller. (Refer to Fig. 30)
(2) Turn the MAIN/SUB changeover switch on one of the 2
remote controllers PC boards to “S”. (Leave the switch of
the other remote controllers set to “M”.) (Refer to Fig. 31)
Upper part of
remote controller
Lower part of
Insert the screw driver
here and gently work
off the upper part of
remote controller.
(Factory setting)
Only 1 remote
controller needs
to be changed if
factory settings
have remained
untouched.
Fig. 31
S
S
M
S
M
Fig. 30
remote controller
Remote controller
PC board
Wiring Method
(See “8. ELECTRIC WIRING WORK” and “9. WIRING EXAMPLE AND HOW TO SET THE REMOTE CONTROLLER” on
page from 10 to 12.)
(3) Remove the control box lid.
(4) Add 2nd remote controller to the transmission terminal
block (P1, P2) in the control box. (There is no polarity.)
(Refer to Fig. 28 on page 11 and Table 4 on page 11)
COMPUTERISED CONTROL 11-3
(FORCED OFF AND ON/OFF OPERATION)
See “FIELD SETTING” on page 12 for local settings.
(1) Wire specifi cations and how to perform wiring
Connect the input from outside to terminals T1 and T2 of
the transmission terminal block.
F2 T1 T2
FORCED
OFF
Input A
Wire specifi cation Sheathed vinyl wire or cable (2 wires)
Gauge AWG 18-16
Length Max. 328 ft.
External terminal
Contact that can ensure the minimum applicable load of 15 V DC, 10 mA.
(2) Actuation
The following table explains FORCED OFF and ON/OFF •
OPERATIONS in response to Input A.
FORCED OFF ON/OFF OPERATION
Input “ON” stops operation (impossible by
remote controllers.)
Input OFF enables control by remote con-
troller.
Input OFF → ON turns
ON unit.
Input ON → OFF turns
OFF unit.
(3) How to select FORCED OFF and ON/OFF OPERATION
Turn the power on and then use the remote controller to •
select operation.
CENTRALIZED CONTROL11-4
For centralized control, it is necessary to designate the group •
No. For details, refer to the manual of each optional controllers for centralized control.
TEST OPERATION 12.
Refer to the section of “FOR THE FOLLOWING ITEMS,
TAKE SPECIAL CARE DURING CONSTRUCTION AND
CHECK AFTER INSTALLATION IS FINISHED.” on page 4.
Make sure if the service lids are closed on the indoor and out- •
door units.
After fi nishing the construction of refrigerant pipe, drain pipe •
and electric wire, conduct the check operation referring to the
installation manual of the outdoor unit.
The operation lamp of the remote controller will fl ash when a •
malfunction occurs. Check the malfunction code on the liquid
crystal display to identify the point of trouble. An explanation
of malfunction codes and the corresponding trouble is provided in the installation manual of the outdoor unit.
It any of the items in Table 6 are displayed, there may be a
problem with the wiring or power, so check the wiring again.
Table 6
Remote control display Content
“
centralized control) is lit up
“U4” is lit up
“UF” is lit up
No display
” (under
If “U3” is lit up, the malfunction code shows the check opera- •
tion has not been performed yet.
There is a short circuit at the •
FORCED OFF terminals (T1, T2)
The power on the outdoor unit is off. •
The outdoor unit has not been wired •
for power supply.
Incorrect wiring for the transmission •
wiring and / or FORCED OFF wiring.
The transmission wiring is cut. •
The power on the indoor unit is off.•
The indoor unit has not been wired •
for power supply.
Incorrect wiring for the remote con-•
troller wiring, the transmission wiring
and / or the FORCED OFF wiring.
The remote controller wiring is cut.•
HOW TO DIAGNOSE FOR MALFUNCTION12-1
With the power on, it is possible to monitor the type of malfunction by looking at the malfunction code displayed in
the remote controller.
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Page 14
If nothing is displayed in the remote controller, check the following items before attempting a diagnosis based on the malfunction code, as they might be a cause.
Disconnected or incorrect wiring (between power supply and •
the outdoor unit, between the outdoor and indoor units, and
between the indoor unit and the remote controller)
Burnt out indoor or outdoor unit fuse •
“ •
” will 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, and does not indicate
a malfunction.
Diagnose with the display on the liquid crystal display
remote controller.
1. With the wired remote controller. (NOTE 1)
When the operation stops due to trouble, operation lamp
fl ashed, and “
” and the malfunction code are indicated
in the liquid crystal display. In such a case, diagnose the fault
contents by referning to the table on the malfunction code list
it case of group control, the unit No. is displayed so that the
indoor unit No. with the trouble can be recognizde. (NOTE 2).
2. With the wireless remote controller.
(Refer also to the operation manual attached to the wireless
remote controller)
When the operation stops due to trouble. the display on the
indoor unit fl ashes. In such a case, diagnose the fault contents with the table on the malfunction code list looking for
the malfunction code which can be found by following procedures. (NOTE 2)
(1) Press the INSPECTION /TEST OPERATION button,
“
” is displayed and “ 0 ” fl ashes.
(2) Press the PROGRAMMING TIME button and fi nd the
unit No. which stopped due to trouble.
Number of beeps
3 short beeps Perform all the following
operations
1 short beep Perform (3) and (6)
1 long beep No trouble
(3) Press the OPERATION MODE SELECTOR button and
upper fi gure of the malfunction code fl ashes.
(4) Continue pressing the PROGRAMMING TIME button
unit it makes 2 short beeps and fi nd the upper code.
(5) Press the OPERATION MODE SELECTOR button and
lower fi gure of the malfunction code fl ashes.
(6) Continue pressing the PROGRAMMING TIME button
unit it makes a long beep and fi nd the lower code.
A long beep indicate the malfunction code. •
NOTE
1. In case wired remote controller. Press the INSPECTION /
TEST OPERATION button on remote controller, “
“
starts fl ashing.
2. Keep down the ON/OFF button for 5 seconds or longer in
the inspection mode and the above trouble history disappears, after the trouble code goes on and off twice, followed
by the code “
”(normal).
The display changes from the inspection mode to the normal mode.
Order Operation
(1) Open gas side stop valve.
(2) Open liquid side stop valve.
(3) Electrify crank case heater for 6 hours.
Set to cooling with the remote controller and push “
(4)
button to start operation.
TEST
Push“
(5)
TION MODE for 3 minutes.
(6) Push“
(7) Push“
(8) Confi rm its function according to the operation manual.
”button twice and operate in TEST OPERA-
”button and confi rm its operation.
SWING
”button and operate normally.
TEST
ON/OFF
MALFUNCTION CODE12-2
For places where the malfunction code is left blank, the “ • ”
indication is not displayed. Though the system continues
operating, be sure to inspect the system and make repairs as
necessary.
Depending on the type of indoor or outdoor unit, the malfunc- •
tion code may or may not be displayed.
Code Malfunction/Remarks
A1 Indoor unit's PC board faulty
A3 Condensate level abnormal
A6 Indoor fan motor overloaded, overcurrent or locked.
A7 Air fl ow direction adjust motor is fault.
A9 Drive for electronic expansion valve is fault.
Type set improper
AJ
C4 Sensor R2T for heat exchanger temperature is fault.
C5 Sensor R3T for heat exchanger temperature is fault.
C9 Sensor R1T for suction air temperature is fault.
CJ
E3 High pressure abnormal (outdoor unit)
E4 Low pressure abnormal (outdoor unit)
E5 Compressor motor lock malfunction
E7
E9 Electronic expansion valve faulty (outdoor unit)
F3 Discharge pipe temperature abnormal (outdoor unit)
F6 The refrigerant is overcharged.
H9 Outdoor air thermistor faulty (outdoor unit)
J3 Discharge pipe thermistor faulty (outdoor unit)
J5 Suction pipe thermistor faulty (outdoor unit)
J6 Heat exchanger thermistor faulty (outdoor unit)
J9 Sensor for heat exchanger is fault.
JA Sensor for high pressure is fault.
JC Sensor for low pressure is fault.
L4
Capacity data is wrongly preset. Or there is nothing programmed in the data hold IC.
Sensor for remote controller is fault.
The remote controller thermistor does not function, but
the system thermo run is possible.
Outdoor fan motor lock malfunction
Outdoor fan instantaneous overcurrent malfunction
Overheated heat-radiating fi n (outdoor)
Inverter cooling defect.
”
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Page 15
Instantaneous overcurrent (outdoor)
L5
L8
L9
LC
P1 Open-phase (outdoor)
P3 PC board temperature sensor malfunction (outdoor)
P4
PJ
U0 Suction pipe temperature abnormal
U2
U3 The check operation has not performed.
U4
UF
U9 Same transmission for in / outdoor unit is fault.
UA
Possible earth fault or short circuit in the compressor
motor.
Electric thermal (outdoor)
Possible electrical overload in the compressor or cut
line in the compressor motor.
Stall prevention (outdoor)
Compressor possibly locked.
Transmission malfunction between the outdoor control
units' inverters (outdoor)
Heat-radiating fi n temperature sensor malfunction
(outdoor)
Type set improper (outdoor unit)
Capacity data is wrongly preset. Or there is nothing
programmed in the data hold IC.
Power source voltage malfunction
Includes the defect in K1M.
Transmission error (indoor unit - outdoor unit)
Miswiring between indoor and outdoor units or malfunc-
tion of the PC board mounted on the indoor and the
outdoor units.
If UF is shown, the wire between the indoor and outdoor
units is not properly wired. Therefore, immediately
disconnect the power supply and correct the wire. (The
compressor and the fan mounted on the outdoor unit
may start operation independent of the remote controller
operation.) The power is not supplied to outdoor unit.
Miss setting for multi system
Setting is wrong for selector switch of multi-system. (see
switch SS2 on the main unit's PC board)
15English
Page 16
(0902)
EM08A093A3PN06240-12Q
FS
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