Aisin AXMP224P7D User manual

AXMP224-280P7D
Always read before installation.
Applicable models
AXMP224P7D AXMP280P7D
Important reminder
- THOROUGHLY READ THESE INSTRUCTIONS BEFORE STARTING THE INSTALLATION AND FOLLOW
ALL PROCEDURES DESCRIBED WITHIN.
- KEEP THIS MANUAL IN A HANDY PLACE FOR FUTURE REFERENCE.
After installation, always use the checklist to perform a final inspection.
INSTALLATION AND MAINTENANCE INSTRUCTIONS
[ Model ] Medium ESP Duct Type
Aisin INDOOR UNITS

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Installation manual
1
AXMP45~280MA-W
Gas driven heat pump air conditioners
Indoor unit
CONTENTS Page
Safety Precaution.............................................................................. 1
Before installation.............................................................................. 3
Transporting the indoor unit .............................................................. 4
Selecting installation site................................................................... 4
Preparations before installation......................................................... 5
Indoor unit installation ....................................................................... 6
Refrigerant piping work ..................................................................... 6
Drain piping work .............................................................................. 8
Electric wiring work ........................................................................... 9
Wiring example and how to set the remote controller ..................... 10
Wiring example ............................................................................... 12
Field setting..................................................................................... 13
Test operation.................................................................................. 14
Wiring diagram ................................................................................ 15
SAFETY PRECAUTION
The types of injuries and damages that can occur if this units are
improperly installed are divided into and covered
under the “ Warning” and “ Caution” graphics and other
symbols. Follow these instructions carefully.
Meaning of warning, caution and other symbols.
WARNING
AXMP45MA-W AXMP90MA-W AXMP224MA-W
AXMP56MA-W AXMP112MA-W AXMP280MA-W
AXMP71MA-W AXMP140MA-W
Gas driven heat pump air conditioners
Indoor unit Installation manual
READ THESE INSTRUCTIONS CAREFULLY BEFORE
INSTALLATION. KEEP THIS MANUAL IN A HANDY
PLACE FOR FUTURE REFERENCE.
IMPROPER INSTALLATION OR ATTACHMENT OF
EQUIPMENT OR ACCESSORIES COULD RESULT IN
ELECTRIC SHOCK, SHORT-CIRCUIT, LEAKS, FIRE OR
OTHER DAMAGE TO THE EQUIPMENT. BE SURE
ONLY TO USE ACCESSORIES MADE BY AISIN WHICH
ARE SPECIFICALLY DESIGNED FOR USE WITH THE
EQUIPMENT AND HAVE THEM INSTALLED BY A
PROFESSIONAL.
IF UNSURE OF INSTALLATION PROCEDURES OR
USE, ALWAYS CONTACT YOUR AISIN DEALER FOR
ADVICE AND INFORMATION.
WARNING Failure to observe a warning may result in
death or serious injury.
CAUTION Failure to observe a caution may result in
injury or damage to the equipment.
Indicates a prohibited action.
Indicates a necessary action.
Indicates a necessity to install a secure earth
connection.
Ask your dealer or qualified personnel to carry out
installation work. Do not try to install the machine yourself
.
Improper installation may result in water leakage, electric
shocks or fire. All field piping must be provided by a licensed
refrigeration technician and must comply with the relevant
local and national codes.
Install the indoor unit on a foundation strong enough to
withstand the weight of the unit.
A foundation of insufficient strength may result in the
equipment falling and causing injuries.
Carry out the specified installation work after taking into
account strong winds, typhoons or earthquakes.
Improper installation work may result in the equipment falling
and causing accidents.
When installing the unit in a small room, take measures
against to keep refrigerant concentration from
exceeding allowable safety limits in the event of
refrigerant leakage.
Excessive refrigerant in a closed ambient can lead to oxygen
deficiency.
Perform installation work in accordance with this
installation 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.
After completing the installation work, check that the
refrigerant gas does not leak.
Toxic gas may be produced if the refrigerant gas leaks into
the room and comes into contact with a source of fire, such
as a fan heater, stove or cooker.
Do not allow anything other than the designated
refrigerant to get mixed into the refrigerant circuit, such
as air, etc.
Doing so could cause an explosion or a fire.
Never touch the refrigerant leaking from refrigerant
piping connection.
If the refrigerant is put on hands, it may cause a frost bite.
If any refrigerant gas leaks while working on the unit,
ventilate the area throughly right away.
Toxic gas may be produced if the refrigerant gas comes into
contact with fire.
Tighten the flare with double wrenches and use a torque
wrench to check that the tightening torque is proper.
If the torque is not proper, a joint broken by over tightening
or a joint loose by under tightening could allow refrigerant to
leak and cause a shortage of oxygen.
Do not route the drain piping directly into to a location
where corrosive gas, such as sulfurous acid gas, could
potentially be generated.
Corrosive gas could enter the indoor and could cause a gas
poisoning or a shortage of oxygen.
Do not touch the drain pump during the drainage flow
testing.
Failure to do so may result in electric shocks.

AXMP45~280MA-W
Gas driven heat pump air conditioners
Indoor unit
Installation manual
2
CAUTION
IMPORTANT REMINDER
Make sure that a separate power supply circuit is
provided 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.
Be sure to install a secure earth connection.
Do not earth the unit to a utility pipe, arrester, or
telephone earth.
Incomplete earth may cause electrical shock, or fire.
A high surge current from lightening or other sources may
cause damage to the indoor unit.
Be sure to install an earth leakage breaker.
Failure to do so may result in electric shocks, or fire.
Never turn on the unit before finishing the installation
work.
Failure to do so could cause electrical shock or damage to
the indoor unit.
When clamping the wirings, be sure to clamp wires
appropriately not to apply any excessive power to the
wire connections.
Improper clamping could damage the wires and may result
in electric shocks, fire or the terminals overheating.
Make sure that the remote controller wiring, and the
transmission wiring between the unis, and other
electrical wiring do not pass through the same locations
outside the unit separating as followings:
- Outside the unit; at least 50 mm
- Inside the unit; at least 25 mm
Failure to do so could cause an electrical noise (external
static) and result in mistaken operation or breakage.
When wiring the power supply and connecting the
remote controller wiring and transmission wiring,
position the wires so that the switch box lid can be
securely fastened. When attaching the service lid, make
sure no wirings get caught in the edges.
Improper positioning of the switch box lid may result in
electric shocks, fire or the terminals overheating.
Never connect the power supply wiring to the terminal
board for transmission wiring.
This mistake could damage the entire system.
When performing field settings or test operation, do not
touch the drain pump.
This may cause electric shock.
Be sure to stop operation and turn the power switch off
before touching the electrical parts.
Failure to do so could result in an electrical shock or unit
malfunction.
Do not touch the switch with wet hands.
This may cause electric shock.
Be sure to handle with care for transporting the unit.
Some of the units are covered with the PP band for
strapping. Be sure not to grab straps when handling.
Be sure to dispose all of the packing materials after
taking out the unit.
Nails and wooden crates may cause a serious injury from
sticking. Plastic sheet covering the unit may result in an
asphyxia if a child play with it. Tear the plastic sheet before
disposing.
Locate the indoor and outdoor units, power supply
wiring and connecting wires at least 1 meter away from
televisions or radios in order to prevent image
interference or noise.
Depending on the radio waves, a distance of 1 meter may
not be sufficient enough to eliminate the noise.
Do not install the indoor unit in the following locations:
(a) where a mineral oil mist or an oil spray or vapor is
produced, 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 produced
Corroding copper pipes or soldered parts may result in
refrigerant leakage.
(c) where flammable gases may leak, where there are
carbon fiber or ignitable dust suspensions in the
air, or where volatile flammables such as thinner or
gasoline are handled.
Operating the unit in such conditions may result in fire.
Do not install the unit tilted. The indoor unit is equipped
with a built-in drain pump and float switch.
If the unit is tilted against condensate flow, the float switch
may malfunction and cause water to drip.
Be sure to insulate any field piping all the way to the
piping connection inside the unit.
Any exposed piping may cause condensation or burns if
touched.
While following the instructions in this installation
manual, install drain piping in order to ensure proper
drainage and insulate piping in order to prevent
condensation.
Improper drain piping may result in water leakage and
property damage to furniture and belongings.
Be sure not to touch the heat exchanger fin.
Failure to do so may result in serious injury.
Be sure to wait for at least five minutes before turning
off the power switch after stopping the operation.
Failure to do so may cause water leakage or other problem.
• Remote controller (wireless kit) transmitting distance can result
shorter than expected in rooms with electronic fluorescent lamps.
(inverter or rapid start types)
Install the indoor unit as far away from fluorescent lamps as
possible.
• Electromagnetic waves may disturb the operation of the control
system and result in a malfunction of the unit. Do not install the
unit near machinery emitting electromagnetic waves.
• Be sure not to install the indoor unit into locations where the air
contains high levels of salt such as that near the ocean, where
the voltage fluctuates greatly such as that in a factories. Also in
vehicles and vessels.
• Do not use flux when brazing refrigerant piping. Therefore, use
the phosphor copper brazing filter metal (BCup-2: JIS Z 3264/B-
Cu93P-710/795/: ISO 3677) which does not require flux.
(Flux has extremely harmful influence on refrigerant piping
systems. For instance, if the chlorine based flux is used, it will
cause pipe corrosion or, in particular, if the flux contains fluorine,
it will damage the refrigeranl oil.)
• Do not use any antioxident sold on the market. It may have an
adverse effect on the refrigerant and compressor oil, resulting in
equipment breakdown.
• Be sure to prevent spatter generated by welding process from
coming in contact with the unit or entering into the unit. It may
damage the drain pan and result in equipment breakdown.
• 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. Keep in mind that it will become the cause of getting
drain pipe blocked if water collects on drain pipe.
• Do not remove the air filter except when cleaning. Unnecessary
handling may damage the filter.

Installation manual
3
AXMP45~280MA-W
Gas driven heat pump air conditioners
Indoor unit
BEFORE INSTALLATION
Be sure to check the type of R410A refrigerant to be used before
installing the unit. Using an incorrect refrigerant will prevent nor-
mal operation of the unit.
This units, both indoor and outdoor, are suitable for installation
in a commercial and light industrial environment. If installed as a
house hold appliance, it could cause electromagnetis
interference.
This unit is a class A product. In a domestic environment this product
may cause radio interference in which case the user may be required
to take adequate measures.
Refer to the installation manual attached to the outdoor unit for
the details about GHP outdoor unit installation.
Do not place objects in direct proximity of the outdoor unit and
do not let leaves and other debris accumulate around the unit.
Leaves are a hotbed for small animals which can enter the unit.
Once in the unit, such animals can cause malfunctions, smoke
or fire when making contact with electrical parts.
Accessories
Check if the following accessories are included with your unit.
Extra parts for AXMP45 140M only
Extra parts for AXMP224, 280M only
Screws for fixing panels are attached to the air inlet panel.
Optional accessories
Following optional remote controller are required to operate this
indoor unit. For the installation, refer to the installation manual
attached to each accessory.
Wired remote controller: There are two types of remote
controllers. Select a remote controller according to customer
request and install in an appropriate place.
For the following items, take special care during construction
and check after installation is finished
1 Items to be checked after completion of installation work
*Also review the “SAFETY PRECAUTION“ on this manual
2 Items to be checked at time of delivery
! " #
Metal clamp
1 piece
Drain hose
1 piece
Clamps
6 pieces
Sealing pad
each
$Large
%Small
Insulation for fitting
1 each
&for gas pipe
'for liquid pipe
(
Washer for hanging
bracket
8 pieces
)
Screws for duct flanges
1 set
AXMP45 90M 16 pieces
AXMP90 - 140M 28 pieces
*
Attached pipings
1 set
Others Qt.
+Screws for flange connection (M5) 48 pcs
,Insulation for hanger bracket 2 pcs
-Washer 8 pcs
.Clamp 2 pcs
/Hexagon head bolt for pipe frange
(M10) 2 pcs
0Spring washer for pipe frange (M10) 2 pcs
Model Cord No.
Wired type ABRC1P528
Wireless type BRC7E618
Tick !
when
checked
Is the indoor unit fixed firmly?
The unit may drop, vibrate or make noise.
Is the outdoor unit installed properly?
The unit may malfunction or components may burn out.
Is the gas leak test finished?
It may result in insufficient cooling.
Is the unit fully insulated?
Condensate water may drip.
Does drainage flow smoothly?
Condensate water may drip.
Does the power supply voltage correspond to that shown on the
name plate?
The unit may malfunction or components may burn out.
Are wiring and piping correct?
The unit may malfunction or components may burn out.
Is the unit safely grounded?
Dangerous at electric leakage.
Is the wiring size according to specifications?
The unit may malfunction or components may burn out.
Is nothing blocking the air outlet or inlet of either the indoor or
outdoor units?
It may result in insufficient cooling.
Are refrigerant piping length and additional refrigerant charge
noted down?
The refrigerant charge in the system might not be clear.
Are the air filters fixed properly (when installing with rear duct)?
Maintenance of the air filters can be impossible.
Tick !
when
checked
Are switch box lid, air filter and suction/discharge grille fixed
firmly?
Did you explain about operations while showing the operation
manual to your customer?
Did you hand the operation manual over to your customer?
Did you explain how to handle and clean the air filter and suction/
discharge grille?
Dis you hand the manual of locally provided parts (if attached)
over to your customer?
NOTE The items with “ Warning” and “ Caution”
marks in the manual are the items regarding
possibilities for bodily injury and material damage in
addition to the general usage of the product.
Accordingly, it is necessary that you make a full
explanation about the described contents and also ask
your customers to read the manual.

AXMP45~280MA-W
Gas driven heat pump air conditioners
Indoor unit
Installation manual
4
Notes to the installer
After the installation work, be sure to instruct the customer how
to properly operate the system especially cleaning filters,
operating different functions, and adjusting the temperature by
having them carry out operations while looking at the manual.
TRANSPORTING THE INDOOR UNIT
CAUTION
Make sure that the route to the installation site and any
passageways are large enough for the indoor unit to be trans-
ported through.
Leave the unit inside its packaging until you reach the
installation site. Where unpacking is unavoidable, use a sling of
soft material or protective plates together with a rope when
lifting, this to avoid damage or scratches to the unit.
SELECTING INSTALLATION SITE
WARNING
CAUTION
IMPORTANT REMINDER
Do not install accessories on the casing directly. Drilling holes in
the casing may damage electrical wires and consequently cause
fire.
1Select an installation site where the following conditions are
fulfilled and that meets your customer's approval.
• Where optimum air distribution can be ensured.
• Where nothing blocks air passage.
• Where condensate water can be properly drained.
• Where the foundation is strong enough to bear the indoor
unit weight.
• Where the false ceiling is not noticeably on an incline.
• Where flammable gases may leak.
• Where sufficient clearance for maintenance and service can
be ensured.
• Where piping between indoor and outdoor units is possible
within the allowable limit. Refer to the installation manual of
the outdoor unit.
2Use suspension bolts for installation. Check whether the ceiling
is strong enough to support the weight of the indoor unit. If there
is a risk, reinforce the ceiling before installing the unit.
Be sure to handle with care for transporting the unit.
Some of the units are covered with the PP band for
strapping. Be sure not to grab straps when handling.
Be sure to dispose all of the packing materials after
taking out the unit.
Nails and wooden crates may cause a serious injury from
sticking. Plastic sheet covering the unit may result in an
asphyxia if a child play with it. Tear the plastic sheet before
disposing.
NOTE Do not dispose of any parts necessary for installation
until the installation is complete.
Ask your dealer or qualified personnel to carry out
installation work. Do not try to install the machine yourself
.
Improper installation may result in water leakage, electric
shocks or fire. All field piping must be provided by a licensed
refrigeration technician and must comply with the relevant
local and national codes.
Install the indoor unit on a foundation strong enough to
withstand the weight of the unit.
A foundation of insufficient strength may result in the
equipment falling and causing injuries.
Carry out the specified installation work after taking into
account strong winds, typhoons or earthquakes.
Improper installation work may result in the equipment falling
and causing accidents.
When installing the unit in a small room, take measures
against to keep refrigerant concentration from
exceeding allowable safety limits in the event of
refrigerant leakage.
Excessive refrigerant in a closed ambient can lead to oxygen
deficiency.
Do not install the indoor unit in the following locations:
(a) where a mineral oil mist or an oil spray or vapor is
produced, 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 produced
Corroding copper pipes or soldered parts may result in
refrigerant leakage.
(c) where flammable gases may leak, where there are
carbon fiber or ignitable dust suspensions in the
air, or where volatile flammables such as thinner or
gasoline are handled.
Operating the unit in such conditions may result in fire.
Locate the indoor and outdoor units, power supply
wiring and connecting wires at least 1 meter away from
televisions or radios in order to prevent image
interference or noise.
Depending on the radio waves, a distance of 1 meter may
not be sufficient enough to eliminate the noise.
• Remote controller (wireless kit) transmitting distance can result
shorter than expected in rooms with electronic fluorescent lamps.
(inverter or rapid start types)
Install the indoor unit as far away from fluorescent lamps as
possible.
• Electromagnetic waves may disturb the operation of the control
system and result in a malfunction of the unit. Do not install the
unit near machinery emitting electromagnetic waves.
• Be sure not to install the indoor unit into locations where the air
contains high levels of salt such as that near the ocean, where
the voltage fluctuates greatly such as that in a factories. Also in
vehicles and vessels.
NOTE When taking the unit out of the packing or moving
the unit afterwards, hold the rigged 4 slings not to
apply unnecessary force to the unit, especially to
the pipings (refrigerant,drain).
In case of that the temperature and humidity of
above ceiling space exceed 30 deg C and RH
80 %, reinforce the inslation (polyethylene form /
grass wool etc.) of 10 mm or more in thickness by
applying to the unit separately.

Installation manual
5
AXMP45~280MA-W
Gas driven heat pump air conditioners
Indoor unit
< AXMP45 140M >
<AXMP224, 280M>
PREPARATIONS BEFORE INSTALLATION
1Make sure the relation of ceiling opening to unit and suspension
bolt position.
< AXMP45 140M>
< AXMP224, 280M >
2Install a canvas duct to the air discharge outlet and air inlet so
that vibration from the machine body isn’t transmitted to the duct
or ceiling.
In addition, acoustic (insulation material) to the inside of the
duct, and vibration insulation rubber to the suspencion bolts
must be applied.
3Make the ceiling opening needed for installation where
applicable (for existing ceilings.)
• Create the ceiling opening required for installation. From the
side of the opening to the casing outlet, implement the
refrigerant and drain piping and wiring for remote controller
(unnecessary for wireless type) and indoor-outdoor unit
casing outlet. Refer to each piping or wiring section.
• After making an opening in the ceiling, it may be necessary to
reinforce ceiling beams to keep the ceiling level and to
prevent it from vibrating. Consult the builder for details.
4Install the suspension bolts.
Use either a W3/8 or M10 size bolt for the suspension bolt. Use
anchors for existing ceilings, and a sunken insert, sunken
anchors or other field supplied parts for new ceilings to reinforce
the ceiling in order to bear the weight of the unit.
INSTALLATION EXAMPLE
Model A
AXMP45 - 90M 750
AXMP112, 140M 1100
1Liquid pipe connection
2Gas pipe connection
3Drain pipe connection
4Ground terminal
5Switch box
6Air discharge flange
7Air suction flange
8Hnager bracket
9Service space 1700 mm
1Service space 1650 mm
Model A B
AXMP45 - 90M 670 720
AXMP112, 140M 1060 1110
A҈450
3
41
2
5
6
7
8
9
470
1
740
690
A B
1
2
34
5҈450
1Indoor unit
2Suspension bolt pitch (x 4 pcs)
3Air inlet
4Air outlet
5Inspection hatch
6Service space
1Anchor
2Ceiling slab
3Long nut or turn-buckle
4Suspension bolt
5Indoor unit
NOTE All the above parts are field supplied.
1296
150 mm
1100
1148
1380
1 3
2
4
5
6
6
҈600
҈ 650
҈ 1100
1
3
2
4
5

AXMP45~280MA-W
Gas driven heat pump air conditioners
Indoor unit
Installation manual
6
INDOOR UNIT INSTALLATION
WARNING
CAUTION
1Install the indoor unit temporarily.
• Lift the indoor unit’s body, and insert the attachment part on
the hanger bracket to the suspension bolt. Be sure to fix it
securely by using a nut and washers (AXMP45 - 140M: )
AXMP224, 280M: -)2from the upper and lower sides of the
hanger bracket.
2Adjust the height of the unit.
3Adjust the unit to the right position for installation.
4Check if the unit is horizontally levelled.
• Check if the unit is levelled at all four corners with a water
level or a water-filled vinyl tube as shown below.
5Tighten the upper nut.
6Insulate the two hanger brackets on the discharge side with the
sealing material ,(× 2 pcs). Insulate the edges so that the sur-
face and edges of the hanger brackets cannot be seen. (for
AXMP224, 280M only).
REFRIGERANT PIPING WORK
This equipment use non-flammable refrigerant, R410A exclu-
sively. Be sure to install the unit according to follows:
Use a pipe cutter and flaring tools suitable for the type of
refrigerant.
Apply compressor oil NL10 around the flare portions before
connectiong.
To prevent dust, moisture or other foreign matter from infiltrating
the tube, either pinch the end or cover it with tape.
WARNING
Perform installation work in accordance with this
installation 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.
Do not install the unit tilted. The indoor unit is equipped
with a built-in drain pump and float switch.
If the unit is tilted against condensate flow, the float switch
may malfunction and cause water to drip.
NOTE When installing optional accessories (except for
the decoration panel), read also the installation
manual of the optional accessories.
Depending on the field conditions, it may be
easier to install optional accessories before the
indoor unit is installed.
1Nut
(field supply)
2Washer
(supplied with the unit )/-)
3Hanger bracket
4Double nut
(field supply, tighten)
NOTE To ensure they are safely secured, use the supplied
washers, and secure them with a double nut to make
sure.
1Water level
2Vinyl tube
3Hanger bracket
2
1
2
3
A
A
3
2
1
1Hanger bracket
2Insulation for hanger bracket ,(supplied with the unit)
*AXMP224, 280M only
Ask your dealer or qualified personnel to carry out
installation work. Do not try to install the machine yourself
.
Improper installation may result in water leakage, electric
shocks or fire. All field piping must be provided by a licensed
refrigeration technician and must comply with the relevant
local and national codes.
Do not allow anything other than the designated
refrigerant to get mixed into the refrigerant circuit, such
as air, etc.
Doing so could cause an explosion or a fire.
Never touch the refrigerant leaking from refrigerant
piping connection.
If the refrigerant is put on hands, it may cause a frost bite.
If any refrigerant gas leaks while working on the unit,
ventilate the area throughly right away.
Toxic gas may be produced if the refrigerant gas comes into
contact with fire.
NOTE For refrigerant piping of outdoor unit, refer to the
installation manual attached to the outdoor unit.
Execute heat insulation work completely on both
sides of the gas piping and the liquid piping to
prevent a water leakage. Use heat insulation with
a heat resistance of 120 deg C or more.
Reinforce the heat insulation depending on the
field conditions. Condensation may form on the
surface of the insulating material.
Be sure to check the type of R410A refrigerant to
be used before installing the unit. Using an incor-
rect refrigerant will prevent normal operation of
the unit.
A
A'
B
B
1
2
A-A'
B-B'

Installation manual
7
AXMP45~280MA-W
Gas driven heat pump air conditioners
Indoor unit
The outdoor unit is charged with refrigerant.
Be sure to use both a spanner and torque wrench together when
connecting or disconnecting pipes to/from the unit.
When connecting the flare nut, coat the flare both with
compressor oil NL10 and initially tighten by hand 3 or 4 turns
before tightening firmly.
Coat here with compressor oil NL10.
WARNING
Refer to Table 1 for the dimensions of flare nut spaces and the
appropriate tightening torque. Overtightening may damage the
flare and cause leaks.
Table 1
Use Table 2 as a reference if a torque wrench is not available.
As tightening the flare nut with the wrench, there is the position
where the torque will suddenly increase. Further tighten the nut
to the angle as shown on Table 2 from that position.
Table 2
Attached piping installation is required for connecting gas
piping of AXMP224, 280M.
Use attached piping *according to the size of the piping to be
connected.
When connecting the piping *, use the hexagon head bolts /
(× 2 pcs) and spring washers 0(× 2 pcs). Appropriate tightening
torque is as follows;
Connect refrigerant piping and branchingaccording to the
installation manual attached to the outdoor unit.
Check the pipe connector for gas leaks.
WARNING
After checking the pipe-connection for gas leakage, insulate the
liquid and gas piping according to the following figure. Be sure to
place the joint of insulator upwardly faced on the gas line piping.
Wrap the small sealing pad %only around the insulation for the
joints on the gas piping side.
CAUTION
When brazing the refrigerant pipng, only begin brazing after
having carried out nitrogen substitution (Note 1) or while flushing
the inside of piping with nitrogen gas (Note 2). Once this is done,
connect the indoor unit with a flared or a flanged connection.
1Torque wrench
2Spanner
3Pipie union
4Flare nut
Tighten the flare with double wrenches and use a torque
wrench to check that the tightening torque is proper.
If the torque is not proper, a joint broken by over tightening
or a joint loose by under tightening could allow refrigerant to
leak and cause a shortage of oxygen.
Pipe
gauge Tightening torque Flare dimension A (mm) Flare shape
Ø6.4
(1/4”)
14.2 - 17.2 N•m
(144 - 176 kgf•cm) 8.7 - 9.1
Ø9.5
(3/8”)
32.7 - 39.9 N•m
(333 - 407 kgf•cm) 12.8 - 13.2
Ø12.7
(1/2”)
49.5 - 60.3 N•m
(504 - 616 kgf•cm) 16.2 - 16.6
Ø15.9
(5/8”)
61.8 - 75.4 N•m
(630 - 770 kgf•cm) 19.3 - 19.7
Pipe gauge Further tightening angle (°) Recommended arm
length of tool (mm)
Ø6.4 (1/4”) 60 - 90 ± 150
Ø9.5 (3/8”) 60 - 90 ± 200
Ø12.7 (1/2”) 30 - 90 ± 250
Ø15.9 (5/8”) 30 - 90 ± 300
NOTE The flare nut used must be those included with the
main body. Failure to do so cause refrigerant to leak.
1 2
4
3
R=0.4~0
.8
452
90
2
A
Tightening torque
21.5 - 28.9 N•m
Indoor unit to be
connected Gas piping diameter Liquid piping diameter
AXMP224M Ø19.1 (3/4”)
Use attached piping. Ø9.5 (3/8”)
AXMP280M Ø22.2 (7/8”)
Use attached piping. Ø9.5 (3/8”)
After completing the installation work, check that the
refrigerant gas does not leak.
Toxic gas may be produced if the refrigerant gas leaks into
the room and comes into contact with a source of fire, such
as a fan heater, stove or cooker.
1Liquid pipe
2Gas pipe
3Insulation for fitting of liquid line
(supplied with the unit ')
4Insulation for fitting of gas line
(supplied with the unit &)
5Small sealing pad
(supplied with the unit %)
6Clamps
(×4 pcs, supplied with the unit#)
Be sure to insulate any field piping all the way to the
piping connection inside the unit.
Any exposed piping may cause condensation or burns if
touched.
5
4
2
3
6
1

AXMP45~280MA-W
Gas driven heat pump air conditioners
Indoor unit
Installation manual
8
IMPORTANT REMINDER
DRAIN PIPING WORK
WARNING
CAUTION
IMPORTANT REMINDER
Rig the drain piping as shown in figure and take measures against
condensation. Improperly rigged piping could lead to leaks and
eventually wet furniture and belongings.
Install the drain pipes.
• Keep piping as short as possible and slope it downwards of
1:100 so that air may not remain trapped inside the pipe.
< AXMP45 140M >
• Keep pipe size equal to or greater than that of the connecting
pipe (vinyl pipe of 25 mm nominal diameter and 32 mm outer
diameter).
• There is negative pressure inside the unit relative to
atmospheric pressure when the unit is running, so be sure to
provide drain frap on the drain outlet as follows;
• In order to prevent any foreign matter such as moisuture,
garbage, and dust from clogging inside the piping, avoid
curves as much as possible, and arrange so the trap can be
cleaned.
< AXMP224, 280M >
• A drain trap need not be installed. (See the following figure)
• The diameter of the piping is the same as that of the
connecting pipe (PS1B), and should be kept equal to or
greater than that of the connecting pipe.
• Do not use flux when brazing refrigerant piping. Therefore, use
the phosphor copper brazing filter metal (BCup-2: JIS Z 3264/B-
Cu93P-710/795/: ISO 3677) which does not require flux.
(Flux has extremely harmful influence on refrigerant pipings. For
instance, if the chlorine based flux is used, it will cause pipe
corrosion or, in particular, if the flux contains fluorine, it will
damage the refrigeranl oil.)
• Do not use any antioxident sold on the market. It may have an
adverse effect on the refrigerant and compressor oil, resulting in
equipment breakdown.
• Be sure to prevent spatter generated by welding process from
coming in contact with the unit or entering into the unit. It may
damage the drain pan and result in equipment breakdown.
1Refrigerant piping
2Part to be brazed
3Nitrogen
4Taping
5Hands valve
6Pressure reducing valve
7Nitrogen gas
NOTE Note 1 :Refer to the installation manual attached to the
outdoor unit for details about how to carry out
nitrogen substitution.
Note 2 :Nitrogen gas flow should be kept at 0.02 Mpa
with a pressure reducing valve when brazing
with flushing nitrogen gas.
Do not route the drain piping directly into to a location
where corrosive gas, such as sulfurous acid gas, could
potentially be generated.
Corrosive gas could enter the indoor and could cause a gas
poisoning or a shortage of oxygen.
While following the instructions in this installation
manual, install drain piping in order to ensure proper
drainage and insulate piping in order to prevent
condensation.
Improper drain piping may result in water leakage and
property damage to furniture and belongings.
1
2
3
4
5
6
7
• 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. Keep in mind that it will become the cause of getting
drain pipe blocked if water collects on drain pipe.
1Drain hose
(supplied with the unit ")2Bottom of the unit
NOTE If unifying multiple drain pipes, install the pipes as
shown in following figure. Select converging drain
pipes whose gauge is suitable for the operating
capacity of the unit.
< AXMP45 140M >
For AXMP224, 280M, a drain trap need not be
installed.
҈50 mm҈50 mm
1
2
҈100 mm
1
3
҈100mm
23
1Drain trap
2T-joint converging drain pipes
3Slope downwards at a gradient of at least
1:100

Installation manual
9
AXMP45~280MA-W
Gas driven heat pump air conditioners
Indoor unit
<All units>
• Insert the drain hose "into the drain socket.
• Tighten the metal clamp !until the screw head is less than
4 mm from the hose.
• Wrap the sealing pad %over the metal clamp
!and drain hose "to insulate.
After piping work is finished, check if drainage flows smoothly.
• Make sure that the drain hose is firmly connected.
• Pour approximately 1 liter of water gradually into the drain
pan to check the drainage flow.
When electric wiring work is finished
Check drainage flow during the cooling operation, explained in "Test
operation" on page 14.
When electric wiring work is not finished
1. Remove the switch box cover and connect the single-phase power
supply and the remote controller to the terminals. (Refer to "Electric
wiring work" on page 9 for switch box attachment/detachment and
wiring.)
2. Next, press the inspection/test operation button on the remote
controller. The unit will engage the test operation mode. Press the
operation mode selector button until selecting fan operation
. Then, press the on/off button . The indoor unit fan and
drain pump will start up. Check that the water has drained from the
unit. Note that the fan also starts rotating. Press to go back
to the first mode.
3. After checking the drainage flow, turn off the power, remove the
switch box lid and disconnect the power supply from the terminal
again.
4. Reattach the switch box lid.
WARNING
After the testing of drain piping is finished, make sure to insulate
the following place to prevent any possible water leakage due to
dew condensation.
- Complete drain piping inside the building (field supply)
- Drain socket
ELECTRIC WIRING WORK
General instructions
All field supplied parts and materials and electric works must
conform to local codes.
Use copper wire only.
Follow the "Wiring diagram" attached to the unit body to wire the
outdoor unit, indoor units and the remote controller. For details
on hooking up the remote controller, refer to the installation
manual of the remote controller.
All wiring must be performed by an authorized electrician.
A circuit breaker capable of shutting down power supply to the
entire system must be installed.
This system consists of multiple indoor units. Mark each indoor
unit as unit A, unit B..., and be sure the terminal board wiring to
each outdoor unit is properly matched. If wiring and piping
between the outdoor unit and an indoor unit are mismatched, the
system may cause a malfunction.
WARNING
1Metal clamp
(supplied with the unit !3
2Drain hose
(supplied with the unit "3
1Metal clamp (suppied with the unit !)2
2Sealing pad (large, supplied with the unit $)
Do not touch the drain pump during the drainage flow
testing.
Failure to do so may result in electric shocks.
21
4 mm
1
2
҈
TEST
TEST
NOTE Be sure not to remove the drain pipe plug. Water might
leak out.
The drain outlet is only used to discharge water if the drain
pump is not used or before maintenance. Gently put in and
out the drain plug. Excessive force may deform the drain
socket of the drain pan.
Pulling out the plug
Do not wiggle the plug up and down
Pushing in the plug
Set the plug and push it by using a Philips screwdriver
Make sure that a separate power supply circuit is
provided 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.
Be sure to install a secure earth connection.
Do not earth the unit to a utility pipe, arrester, or
telephone earth.
Incomplete earth may cause electrical shock, or fire.
A high surge current from lightening or other sources may
cause damage to the indoor unit.
Be sure to install an earth leakage breaker.
Failure to do so may result in electric shocks, or fire.
1
1Drain plug
1
2
1Drain plug
2Philips screwdriver

AXMP45~280MA-W
Gas driven heat pump air conditioners
Indoor unit
Installation manual
10
Electrical characteristics
MCA: Min. circuit Amps (A)
MFA: Max. Fuse Amps (A)
KW: Fan Motor Rated Output (kW)
FLA: Full Load Amps (A)
Specifications for field supplied fuses and wire
WIRING EXAMPLE AND HOW TO SET THE
REMOTE CONTROLLER
WARNING
CAUTION
How to connect wiring
Remove the switch box lid as shown below, and make the
connections.
< AXMP45 140M >
Never turn on the unit before finishing the installation
work.
Failre to do so could cause electrical shock or damage to the
indoor unit.
Model Hz Volts Voltage range
AXMP45 - 280M 50 220 - 240 min. 198-max. 264
60 220 min. 198-max. 242
50Hz Power supply Fan motor
Model MCA MFA KW FLA
AXMP45 - 71M 1.3 15 A 0.100 1.0
AXMP90M 1.5 15 A 0.160 1.2
AXMP112M 2.5 15 A 0.270 2.0
AXMP140M 3.8 15 A 0.430 3.0
AXMP224M 8.1 15 A 0.380x2 6.5
AXMP280M 9.0 15 A 0.380x2 7.2
60Hz Power supply Fan motor
Model MCA MFA KW FLA
AXMP45 - 71M 1.4 15 A 0.100 1.1
AXMP90M 1.6 15 A 0.160 1.3
AXMP112M 3.0 15 A 0.270 2.4
AXMP140M 4.4 15 A 0.430 3.5
AXMP224M 9.0 15 A 0.380x2 7.2
AXMP280M 10.1 15 A 0.380x2 8.1
NOTE For details, contact your AISIN dealer for the electrical
data.
Model Power supply wiring
Field fuses Wire Size
AXMP45 - 280M 15 A H05VV - U3G Local codes
Model
Remote controller wiring
and Transmission wiring
Wire Size
AXMP45 - 280M Sheathed wire (2 core) 0.75 - 1.25 mm2
NOTE For details, refer to the chapter "Wiring example"
on page 12.
Allowable length of transmission wiring between
indoor and outdoor units, and between the indoor
unit and the remote controller is as follows:
• Outdoor unit - indoor unit: max. 1000 m
(total wiring length: 2000 m)
• Indoor unit - remote controller: max 500 m
When clamping the wirings, be sure to clamp wires
appropriately not to apply any excessive power to the
wire connections.
Improper clamping could damage the wires and may result
in electric shocks, fire or the terminals overheating.
Make sure that the remote controller wiring, and the
transmission wiring between the unis, and other
electrical wiring do not pass through the same locations
outside the unit separating as followings:
- Outside the unit; at least 50 mm
- Inside the unit; at least 25 mm
Failure to do so could cause an electrical noise (external
static) and result in mistaken operation or breakage.
When wiring the power supply and connecting the
remote controller wiring and transmission wiring,
position the wires so that the switch box lid can be
securely fastened. When attaching the service lid, make
sure no wirings get caught in the edges.
Improper positioning of the switch box lid may result in
electric shocks, fire or the terminals overheating.
Never connect the power supply wiring to the terminal
board for transmission wiring.
This mistake could damage the entire system.
Locate the indoor and outdoor units, power supply
wiring and connecting wires at least 1 meter away from
televisions or radios in order to prevent image
interference or noise.
Depending on the radio waves, a distance of 1 meter may
not be sufficient enough to eliminate the noise.
3
2
5
1
4
8
7
6

AXMP45~280MA-W
Gas driven heat pump air conditioners
Indoor unit
Installation manual
11
< AXMP224, 280M >
Power supply wiring
Hold the swich box lid and loosen the anchoring screws, then
remove the switch box lid. Connect the wires to the power
supply terminal board inside. While doing this, pull the wires
inside through the power supply wiring port and clamp the wires
with the plastic clamp #.
Unit wiring and remote controller wiring
Hold the swich box lid and loosen the anchoring screws, then
remove the switch box lid. Pull the wires inside through the
transmission wiring port and connect to the terminal board for
unit transmission wiring. After the connection, securely fix wires
with plastic clamp #.
< AXMP45 140M >
< AXMP224, 280M >
Precautions
1Use round crimp-style terminals for connecting wires to the
power supply terminal board.
If unavoidable, observe the notes mentioned below when wiring
to the power supply terminal board.
• Do not connect wires of different gauge to the same power
supply terminal. Looseness in the connection may cause
overheating.
• When connecting wires of the same gauge, connect them
according to the figure.
2Keep total current of crossover wiring between indoor units less
than 12 A. Branch the line outside the terminal board of the unit
in accordance with electrical equipment standards, when using
two power wiring of a gauge greater than 2 mm2(Ø1.6).
The branch must be sheathed in order to provide an equal or
greater degree of insulation as power supply wiring itself.
3Do not connect wires of different gauge to the same grounding
terminal. Looseness in the connection may deteriorate the
protection.
4For the remote controller wiring, refer to the installation manual
of the remote controller supplied with the remote controller.
5Use only specified wires and tightly connect wires to the
terminals. Be careful that wires do not place external stress on
the terminals. Keep wiring in neat order so that they do not
obstruct other equipment such as popping open the switch box
cover. Make sure the cover closes tight. Incomplete connections
could result in overheating, and in the worse case, electric shock
or fire.
1Switch box lid
2Ground wiring
3Power supply wiring
4Transmission wiring
5Remote controller wiring
6Clamp (supplied with the unit #)
7Wire locking bracket
8Wiring
1
4
2
3
5
8
7
6
T2
T1
F2
F1
P2
P1
3
6
1
2
5
X2M
X1M
4
1Power supply terminal block
2Terminal block for remote controller
3Power supply wiring, ground wiring
4Transmission wiring
5Remote controller wiring
6Clamp (supplied with the unit #)
1Round-crimp style terminal
2Attach insulation sleeve
3Electric wire
6
1
2
5
X2M X1M
43
3
1
2

Installation manual
12
AXMP45~280MA-W
Gas driven heat pump air conditioners
Indoor unit
6Use the correct driver for tightening the terminal screws. If the
blade is too small, the head of the screw will not be properly
tightened. Refer to the table below for the tightening torque of
the terminal screws.
7After all wiring connections are done, fill in any gaps in the
casing wiring holes with putty or insulation material (field supply)
to prevent small animals or dirt from entering the unit from
outside and causing short circuits in the switch box.
WIRING EXAMPLE
Fit the power supply wiring of each unit with a switch and fuse as
shown below.
Complete system example (3 systems)
1. When using 1 remote controller for 1 indoor unit.
(Normal operation)
2. For group control or use with 2 remote controllers
3. When including BS unit
Terminal Tightening torque (N•m)
Remote controller, Transmission wiring and
forced off terminal block (6P) 0.79 - 0.97
Power supply
terminal block
AXMP45 - 140M (2P) 1.18 - 1.44
AXMP224M, 280M 2.39 - 2.91
Ground terminal
AXMP45 - 140M 1.44 - 1.94
AXMP224M, 280M 3.02 - 4.08
1Power supply
2Main switch
3Power supply wiring
4Transmission wiring
5Switch
6Fuse
7BS unit (only for heat recovery system)
8Indoor unit
9Remote controller
3
4
5
6
1
2
9
8
7
NOTE It is not necessary to designate indoor unit address
when using group control. The address is
automatically set when the power is activated.
1Outdoor unit
2Indoor unit
3Remote controller (optional accessories)
4Most downstream indoor unit
5For use with 2 remote controllers
6BS unit (only for heat recovery system)
L N L N
IN/D OUT/D
F1F2F1F2
Control box
L N
LN P 1 P 2
P 1 P 2
F 1 F 2 T 1 T 2 P 1 P 2
P 1 P 2
F 1 F 2 T 1 T 2LN P 1 P 2
P 1 P 2
F 1 F 2 T 1 T 2LN L N P 1 P 2
P 1 P 2
F 1 F 2 T 1 T 2
L N
1
2
3
2
IN/D OUT/D
F1F2F1F2
Control box
L N P 1 P 2
P 1 P 2
F 1 F 2 T 1 T 2LN P 1 P 2 F 1 F 2 T 1 T 2LN P 1 P 2 F 1 F 2 T 1 T 2LN P 1 P 2 F 1 F 2 T 1 T 2
P 1 P 2 P 1 P 2
L N
1
4
5
IN/D OUT/D
F
1 F 2 F 1 F 2
IN/DOUT/D
F
1 F 2 F 1 F 2
L N
P 1 P 2
P 1 P 2 F 1 F 2 T 1 T 2
6
1
24
Control box
Control box
IN/DOUT/D
F
1 F 2 F 1 F 2
6
Control box
L N
P 1 P 2
P 1 P 2 F 1 F 2 T 1 T 2
L N L N

AXMP45~280MA-W
Gas driven heat pump air conditioners
Indoor unit
Installation manual
13
When using 2 Remote Controllers (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 wedge-head screwdriver into the recess between the upper
and lower part of the 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 the remote controller.
2. Turn the main/sub changeover switch on one of the two remote
controller PC boards to "S".
• Leave the switch of the other remote controller set to "M".
Computerised control (forced off and on/off operation)
1. Wire specifications and how to perform wiring
• Connect input from outside to terminals T1 and T2 of the
terminal board (remote controller to transmission wiring).
2. Actuation
• The following table explains "forced off" and "on/off
operations" in response to input A.
3. How to select forced off and on/off operation
• To enable forced off and on/off operation, field setting must
be preliminary performed. Refer to following "Field setting" on
page 13.
Centralized control
For centralized control, it is necessary to designate the group
No. For details, refer to the manual of each optional controller for
centralized control.
FIELD SETTING
WARNING
Field setting must be made on the remote controller in function of the
installation condition.
Make sure that the service lids are closed on the indoor and
outdoor units.
Setting can be made by changing the "Mode number", "First
code No." and "Second code No.".
EXAMPLE: When setting forced on and on/off operation
• Turn the power on and then use the remote controller to
select operation.
• Set the remote controller to the field set mode. For details,
refer to the chapter “How to set in the field“ in the installation
manual attached to the remote controller.
• When in the field setting mode, select mode No.12, then set
the first code No. to ‘1’. Then set seconde code No. to ‘01’ for
forced off and to ‘02’ for on/off operation.
For setting and operation, refer to the "Field settings" in the
installation manual of the remote controller.
NOTE 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.
For a group control remote controller, choose the
remote controller that suits the indoor unit which
has the most functions.
Do not ground the equipment on gas pipes, water
pipes, lightning rods or crossground with
telephones. Improper grounding could result in
electric shock.
1Remote controller PC board
2Factory setting
3Only one remote controller needs to be changed if factory
settings have remained untouched.
Wire specification Sheathed vinyl cord or cable (2 wire)
Gauge 0.75 - 1.25 mm2
Length Max. 100 m
External terminal Contact that can ensure the minimum
applicable load of 15 V DC, 1 mA
Input A1
S
M
S
S
M
1
2
3
F2 T1 T2
FORCED
OFF
1
Forced off On/off operation
Input "on" stops operation input off "on: turns on the unit
(impossible by remote controllers)
Input "off" enables control input on "off: turns off the unit by
remote controller
When performing field settings or test operation, do not
touch the drain pump.
This may cause electric shock.
1Second code No.
2Mode No.
3First code No.
4Field set mode
SETTING
4
21
3

Installation manual
14
AXMP45~280MA-W
Gas driven heat pump air conditioners
Indoor unit
Summary of field settings TEST OPERATION
WARNING
Refer to the installation manual of the outdoor unit.
The operation lamp of the remote controller will flash when an
error occurs. Check the error code on the liquid crystal display to
identify the trouble. An explanation of error codes and the
corresponding trouble are provided on "Trouble diagnosis" of the
outdoor unit installation manual.
In case something is wrong with the unit and it does not operate,
refer to the malfunction diagnosis label attached to the unit.
If any of the items in the following table are displayed, there may
be a problem with the wiring or power, so double-check the
wiring.
Mode
No.
(Note 1)
First
code
No.
Description of setting
Second code No. (Note 2)
01 02 03 04
10
(20)
0
Filter contamination
- Heavy/Light
(Setting of filter sign
display interval for
cleaning.) (Setting to
reduce displaying
period to half when
filter contamination
is high.)
Ultra-long-
life filter
Light
±10,000 hrs.
Heavy
±5,000 hrs.
— —
Long-life
filter ±2,500 hrs. ±1,250 hrs.
Standard
filter ±200 hrs. ±100 hrs.
2
Thermostat sensor selection
Use both the
unit sensor (or
remote sensor if
installed) AND
the remote
controller
sensor.
(See note 5+6)
Use unit sensor
only (or remote
sensor if
installed).
(See note 5+6)
Use remote
controller
sensor only.
(See note 5+6)
—
3
Display of air filter cleaning sign
( to be set when not setting filter
cleaning sign)
Display Do not display — —
5
Information to I-manager,
I-touch controller
Only unit sensor
value (or remote
sensor value if
installed).
Sensor value as
set by 10-2-0X
or 10-6-0X.
— —
6
Thermostat sensor in group
control
Use unit sensor
only (or remote
sensor if
installed).
(See note 6)
Use both the
unit senor (or
remote sensor if
installed) AND
the remote
controller
sensor. (See
note 4+5+6)
— —
12
(22)
0
Output signal X1-X2 of the
optional KRP1B PCB kit
Thermostat-on +
compressor run — Operation Mal- function
1
ON/OFF input from outside
(T1/T2 input) = Setting for when
forced ON/OFF is to be
operated from outside.
Forced OFF ON/OFF
operation — —
3
Fan setting during thermostat
OFF at heating operation LL Set speed OFF
(See note 3) —
4
Differential automatic
changeover 0°C 1°C 2°C
3°C
(See
note 7)
5
Auto-restart after power failure Disabled Enabled — —
15
(25) 3
Drain pump operation +
humidifier interlock Not equipped Equipped — —
Note 1 : Setting is carried out in the group mode, however, if the mode number inside parentheses is selected,
indoor units can also be set individually.
Note 2 : Factory settings of the Second code No. are marked in grey backgrounds.
Note 3 : Only use in combination with optional remote sensor or when setting 10-2-03 is used.
Note 4 : If group control is selected and remote controller sensor is to be used, then set 10-6-02 & 10-2-03.
Note 5 : If setting 10-6-02 + 10-2-01 or 10-2-02 or 10-2-03 are set at the same time, then setting 10-2-01,
10-2-02 or 10-2-03 have priority.
Note 6 : If setting 10-6-01 + 10-2-01 or 10-2-02 or 10-2-03 are set at the same time, then setting for group
connection, 10-6-01 has priority and for individual connection, 10-2-01, 10-2-02 or 10-2-03 have
priority.
Note 7 : More settings for “Differential automatic changeover” function temperatures are:
Second code No.
05 4°C
06 5°C
07 6°C
08 7°C
When performing field settings or test operation, do not
touch the drain pump.
This may cause electric shock.
Be sure to stop operation and turn the power switch off
before touching the electrical parts.
Failure to do so could result in an electrical shock or unit
malfunction.
Do not touch the switch with wet hands.
This may cause electric shock.
Remote control display Content
“Concentrated Management“
is lit up
• There is a short circuit at the T1,T2
terminals for “forced off” function
“U4“ is lit up
“UH“ is lit up
• The outdoor unit power is OFF
• The outdoor unit has not been wired for
power supply
• Incorrect wiring of the transmission
wiring and/or “forced off“ wiring
• Disconnected transmission wiring
No display
• The indoor unit power is OFF
• The indoor unit has not been wired for
power supply
• Incorrect wiring of the remote controller
wiring and/or the “forced off“ wiring
• Disconnected remote controller wiring

AXMP45~280MA-W
Gas driven heat pump air conditioners
Indoor unit
Installation manual
15
WIRING DIAGRAM
33H ........................ FLOAT SWITCH
A1P........................ PRINTED CIRCUIT BOARD
A2P........................ TERMINAL BOARD
C1R ....................... CAPACITOR (FAN)
F1U........................ FUSE (250 V/10 A)
F2U........................ FIELD FUSE
HAP ....................... LIGHT EMITTING DIODE (SERVICE MONITOR - GREEN)
M1F ....................... MOTOR (FAN)
M1P ....................... MOTOR (DRAIN PUMP)
Q2E ....................... EARTH LEAK DETECTOR
R1T ........................ THERMISTOR (AIR)
R2T,R3T ................ THERMISTOR (REFRIGERANT)
RyF1-3................... MAGNETIC RELAY (FAN)
RyP........................ MAGNETIC RELAY (DRAIN PUMP)
X1M ....................... TERMINAL STRIP (POWER)
X2M ....................... TERMINAL STRIP (CONTROL)
T1R........................ TRANSFORMER (220-240 V/22 V)
Y1E........................ ELECTRONIC EXPANSION CIRCUIT
OPTIONAL PARTS
F3-5U..................... FUSE (250 V/16 A)
J1EH...................... ELECTRIC HEATER
K1R........................ MAGNETIC RELAY (J1EH)
ADAPTOR FOR WIRING
RyC,RyF ................ MAGNETIC RELAY
RyH........................ MAGNETIC RELAY (J1EH)
F1U,F2U ................ FUSE (250 V/5 A)
X1A,X2A ................ CONNECTOR (WIRING ADAPTOR)
X1M ....................... TERMINAL STRIP
CONNECTOR FOR OPTIONAL PARTS
X16A...................... CONNECTOR (WIRING ADAPTOR)
X18A...................... CONNECTOR (WIRING ADAPTOR FOR ELECTRICAL APPENDICES)
: FIELD WIRING BLK : BLACK
: TERMINAL BLU : BLUE
: CONNECTOR ORG : ORANGE
: WIRE CLAMP PNK : PINK
: PROTECTIVE EARTH (SCREW) RED : RED
WHT : WHITE
YLW : YELLOW
,
RECEIVER/DISPLAY UNIT :
WIRED REMOTE CONTROLLER :
SWITCH BOX :
TRANSMISSION WIRING :
INPUT FROM OUTSIDE :
CENTRAL REMOTE CONTROLLER :
NOTE 1. WHEN USING THE CENTRAL REMOTE CONTROLLER, SEE MANUAL FOR CONNECTION TO THE UNIT.
2. X23A IS CONNECTED WHEN THE CENTRAL REMOTE CONTROLLER IS USED.
3. WHEN CONNECTING THE INPUT WIRES FROM OUTSIDE, FORCED OFF OR ON/OFF CONTROL OPERATION CAN BE
SELECTED BY THE REMOTE CONTROLLER. SEE INSTALLATION MANUAL FOR MORE DETAILS.

SAFETY PRECAUTION
The types of injuries and damages that can occur if this units are
improperly installed are divided into and covered
under the “ Warning” and “ Caution” graphics and other
symbols. Follow these instructions carefully.
Meaning of warning, caution and other symbols.
MAINTENANCE
WARNING
CAUTION
How to clean the air filter
IMPORTANT REMINDER
Clean the air filter when the display shows " " (TIME TO CLEAN
AIR FILTER).
Increase the frequency of cleaning if the unit is installed in a room
where the air is extremely contaminated.
(As a yardstick for yourself, consider cleaning the filter once a half
year.)
If the dirt becomes impossible to clean, change the air filter. (Air filter
for exchange is optional.)
Refer to the operation manual attached to the air filter for how to
dettach and attach the air filter.
Aisin Gas Heat Pump Air Conditioner
GHP INDOOR UNIT MAINTENANCE INSTRUCTIONS
Ceiling-mounted High ESP Duct Type AXMP (45, 56, 71, 90, 112, 140,224,280) MA-W
THOROUGHLY READ THESE INSTRUCTIONS BEFORE AND FOLLOW ALL PROCEDURES DESCRIBED WITHIN.
KEEP THIS MANUAL IN A HANDY PLACE ALONG WITH THE OPERATION MANUAL
ONLY A QUALIFIED SERVICE PERSON IS ALLOWED
TO PERFORM MAINTENANCE.
BEFORE OBTAINING ACCESS TO TERMINAL
DEVICES, ALL POWER SUPPLY CIRCUITS MUST BE
INTERRUPTED.
FOR INSTALLATION OF OPTICAL PARTS, ONLY A
QUALIFIED PERSON IS ALLOWED TO DO SO TO
PREVENT ANY OF WATER LEAKAGE, ELECTRICAL
SHOCK OR FIRE.
WARNING Failure to observe a warning may result in
death or serious injury.
CAUTION Failure to observe a caution may result in
injury or damage to the equipment.
Indicates a prohibited action.
Indicates a necessary action.
Indicates a necessity to install a secure earth
connection.
Be sure to stop operation and turn the power switch off
before cleaning the air conditioner.
Failure do so could result in an electrical shock or injury. To
prevent an injury, make sure that the fan has stopped before
working on the indoor unit.
Do not wash the indoor unit with water or a detergent
spray.
Doing so could cause an electrical shock or a fire.
Be sure to stop operation and turn the power switch off
before cleaning the air conditioner.
Failure do so could result in an electrical shock or injury. To
prevent an injury, make sure that the fan has stopped before
working on the indoor unit.
Do not wash the indoor unit with water or a detergent
spray.
Doing so could cause an electrical shock or a fire.
Do not place anything other than the designated air filter
to the air inlet.
Failure to do so could lower the indoor unit performance and
cause damage to household property from the leakage.
Use a stable tool when cleaning the indoor unit.
Since it is high-place work, use extra cautions for the place
standing at.
1Suction grill
2Air filter (option, inside suction grill)
3Air outlet
4Remote controller
• Do not remove the air filter except when cleaning. Unnecessary
handling may damage the filter.
1
2
3
4
AXMP45~280MA-W
Gas driven heat pump air conditioners
Indoor unit
Installation manual
16

1. Open the suction grille.
2. Remove the air filters.
3. Clean the air filter.
Remove dust from the air filter using vacuum cleaner (A) and
gently rinse them in cool water (B). Do not use detergent or hot
water to avoid filter shrinking or deformation.
When the air filter is very dirty, use soft brush and neutral
detergent.
After cleaning, remove water and dry them in the shade.
4. Fix a air filter.
5. Close the air suction grille.
6. After turning on the power, press FILTER SIGN RESET button.
The "TIME TO CLEAN AIR FILTER" display disappears.
(For details, refer to the operation manual of the outdoor unit.)
How to clean air outlet and outside panels
Clean with soft cloth.
When it is difficult to remove stains, use water of neutral
detergent.
Start up after a long stop
1. Confirm the following:
- Check that the air inlet and outlet are not blocked. Remove
any obstacle.
- Check if the earth is connected.
2. Clean the air filter and outside panels.
- After cleaning the air filter, make sure to attach it.
3. Turn on the main power supply switch.
- The control panel display lights when the power is turned on.
- To protect the unit, turn on the main power switch at least 6
hours before operation.
What to do when stopping the system for a long period
1. Turn on FAN OPERATION for half a day and dry the unit.
- Refer to the operation manual of the outdoor unit.
2. Cut off the power supply.
- When the main power switch is turned on, some wattage is
being consumed even if the system is not operating.
- The remote controller display is turned off when the main
power switch is turned off.
DISPOSAL REQUIREMENTS
Dismantling of the unit, treatment of the refrigerant, of oil and of other
parts must be done in accordance with relevant local and national
legislation.
NOTES
NOTE Do not let go of the suction grille when opening or
closing it. If released, the grille will spring back closed.
(A) Using a vacuum cleaner (B) Washing with water
NOTE Do not wash it with hot water of more than 50°C,
as doing so may result in discoloration and/or
deformation.
Do not expose it to fire, as doing so may result in
burning.
NOTE Once cleaning is done be sure to replace the air filter
as it was.
NOTE Do not use gasoline, benzene, thinner, polishing
powder nor liquid insecticide. It may cause
discolouring or warping.
Do not let the indoor unit get wet. It may cause
electric shock or fire.
Clean the air suction grille when it is closed.
Installation manual
17
AXMP45~280MA-W
Gas driven heat pump air conditioners
Indoor unit

04.2014