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 156 

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 '10 • SCM-SM-094

PJA012D781

INSTALLATION MANUAL FOR CEILING CASSETTE

– 4 WAY COMPACT (600 x 600mm) –

This manual is for the installation of an indoor unit.
For electrical wiring work (Indoor), refer to the electrical wiring work installation manual. For remote 
controller installation, refer to the installation manual attached to a remote controller. For wireless 
kit installation, refer to the installation manual attached to a wireless kit. For electrical wiring work 
(Outdoor) and refrigerant pipe work installation for outdoor unit, refer to the installation manual 
attached to an outdoor unit.
This unit must always be used with the panel.

SAFETY PRECAUTIONS

Read the “SAFETY PRECAUTIONS” carefully first of all and then strictly follow it during the installation 

work in order to protect yourself.

 

The precautionary items mentioned below are distinguished into two levels, 

 and 

.

 

: Wrong installation would cause serious consequences such as injuries or death.

 

: Wrong installation might cause serious consequences depending on circumstances.

Both mentions the important items to protect your health and safety so strictly follow them by any means.

 

After completing the installation, do commissioning to confirm there are no abnormalities, and explain to the 

customers about “SAFETY PRECAUTIONS”, correct operation method and maintenance method (air filter 
cleaning, operation method and temperature setting method) with user’s manual of this unit.
Ask your customers to keep this installation manual together with the user’s manual. Also, ask them to hand 
over the user’s manual to the new user when the owner is changed.

Installation should be performed by the specialist.

If you install the unit by yourself, it may lead to serious trouble such as water leakage, electric shock, fire, and 

injury due to overturn of the unit.

Install the system correctly according to these installation manuals. 

Improper installation may cause explosion, injury, water leakage, electric shock, and fire.

Consider measurement not to exceed the limit of the density of refrigerant in the event of 

leakage especially when it is installed in a small room.

Consult the specialist about the measure. If the density of refrigerant exceeds the limit in the event of the leakage, 

serious accidents may occur due to lack of oxygen.

Use the genuine accessories and the specified parts for installation.

If parts unspecified by our company are used it could cause water leakage, electric shock, fire, and injury due to 

overturn of the unit.

Ventilate the working area well in case the refrigerant leaks during installation.

If the refrigerant contacts the fire, toxic gas is produced.

Install the unit in a location that can hold heavy weight.

Improper installation may cause the unit to fall leading to accidents.

Install the unit properly in order to be able to withstand strong winds such as typhoons, and 

earthquakes.

Improper installation may cause the unit to fall leading to accidents.

Do not mix air in to the cooling cycle on installation or removal of the air conditioner.

If air is mixed in, the pressure in the cooling cycle will rise abnormally and may cause explosion and injuries.

Be sure to have the electrical wiring work done by qualified electrical installer, and use 

exclusive circuit.

Power source with insufficient capacity and improper work can cause electric shock and fire.

Use specified wire for electrical wiring, fasten the wiring to the terminal securely, and hold the 

cable securely in order not to apply unexpected stress on the terminal.

Loose connections or hold could result in abnormal heat generation or fire.

Arrange the electrical wires in the control box properly to prevent them from rising. Fit the lid 

of the services panel property.

Improper fitting may cause abnormal heat and fire.

Check for refrigerant gas leakage after installation is completed.

If the refrigerant gas leaks into the house and comes in contact with a fan heater, a stove, or an oven, toxic gas 

is produced.

Use the specified pipe, flare nut, and tools for R410A.

Using existing parts (R22) could cause the unit failure and serious accident due to explosion of the cooling cycle.

Tighten the flare nut according to the specified method by with torque wrench.

If the flare nut were tightened with excess torque, it could cause burst and refrigerant leakage after a long period.

Make sure there is no dust or clogging on both the plug and the socket nor loose connection 

of the socket before plugging, and plug in securely to the end of the blade.

Accumulation of dust, clogging on the socket or plug, or loose installation of the socket could cause electric shock 

and fire. Replace the socket if it is loose.

Connect the pipes for refrigeration circuit securely in installation work before compressor is 

operated.

If the compressor is operated when the service valve is open without connecting the pipe, it could cause 

explosion and injuries due to abnormal high pressure in the system.

Stop the compressor before removing the pipe on pump down work.

If the pipe is removed when the compressor is in operation with the service valve open, air would be mixed in the 

refrigeration circuit and it could cause explosion and injuries due to abnormal high pressure in the cooling cycle.

Use the genuine optional parts. And installation should be performed by a specialist.

If you install the unit by yourself, it could cause water leakage, electric shock and fire.

Do not repair by yourself. And consult with the dealer about repair.

Improper repair may cause water leakage, electric shock or fire.

Consult the dealer or a specialist about removal of the air conditioner.

Improper installation may cause water leakage, electric shock or fire.

Turn off the power source during servicing or inspection work.

If the power is supplied during servicing or inspection work, it could cause electric shock and injury by the 

operating fan.

Do not run the unit when the panel or protection guard are taken off.

Touching the rotating equipment, hot surface, or high voltage section could cause an injury to be caught in the 

machine, to get burned, or electric shock.

Shut off the power before electrical wiring work.

It could cause electric shock, unit failure and improper running.

WARNING

Perform earth wiring surely.

Do not connect the earth wiring to the gas pipe, water pipe, lightning rod and telephone earth wiring. Improper 

earth could cause unit failure and electric shock due to a short circuit.

Use the circuit breaker of correct capacity.

Using the incorrect capacity one could cause the system failure and fire.

Do not use any materials other than a fuse of correct capacity where a fuse should be used.

Connecting the circuit by wire or copper wire could cause unit failure and fire.

Do not install the indoor unit near the location where there is possibility of flammable gas 

leakages.

If the gas leaks and gathers around the unit, it could cause fire.

Do not install and use the unit where corrosive gas (such as sulfurous acid gas etc.) or 

flammable gas (such as thinner, petroleum etc.) may be generated or accumulated, or volatile 

flammable substances are handled.

It could cause the corrosion of heat exchanger, breakage of plastic parts etc. And inflammable gas could cause fire.

Do not use the indoor unit at the place where water splashes such as laundry.

Indoor unit is not waterproof. It could cause electric shock and fire.

Do not use the indoor unit for a special purpose such as food storage, cooling for precision 

instrument, preservation of animals, plants, and a work of art.

It could cause the damage of the items.

Do not install nor use the system near equipments which generate electromagnetic wave or 

high harmonics.

Equipments like inverter equipment, private power generator, high-frequency medical equipment, or 

telecommunication equipment might influence the air conditioner and cause a malfunction and breakdown. Or the 

air conditioner might influence medical equipments or telecommunication equipments, and obstruct their medical 

activity or cause jamming.

Do not install the remote controller at the direct sunlight.

It could cause breakdown or deformation of the remote controller.

Do not install the indoor unit at the place listed below.

Places where flammable gas could leak.

Places where carbon fiber, metal powder or any powder is floated.

Place where the substances which affect the air conditioner are generated such as sulfide gas, chloride gas, 

acid or alkali.

Places exposed to oil mist or steam directly.

On vehicles and ships

Places where machinery which generates high harmonics is used.

Places where cosmetics or special sprays are frequently used.

Highly salted area such as beach.

Heavy snow area

Places where the system is affected by smoke from a chimney.

Altitude over 1000m

Do not put any valuables which will break down by getting wet under the air conditioner.

Condensation could drop when the relative humidity is higher than 80% or drain pipe is clogged, and it damages 

user’s belongings.

Do not use the base frame for the outdoor unit which is corroded or damaged after a long 

period of use.

It could cause the unit falling down and injury.

Pay attention not to damage the drain pan by weld sputter when brazing work is done near the 

unit.

If sputter entered into the unit during brazing work, it could cause damage (pinhole) of drain pan and leakage of 

water. To avoid damaging, keep the indoor unit packed or cover the indoor unit.

Install the drain pipe to drain the water surely according to the installation manual.

Improper connection of the drain pipe may cause dropping water into room and damaging user’s belongings. 

Do not put the drain pipe directly into the ditch where toxic gas such as sulfide gas is 

generated.

Toxic gas would flow into the room and it would cause serious damage to user’s health and safety.

Do not share the drain pipe for indoor unit and GHP (Gas Heat Pump system) outdoor unit.

Toxic exhaust gas would flow into room and it might cause serious damage (some poisoning or deficiency of 

oxygen) to user’s health and safety.

For drain pipe installation, be sure to make descending slope of greater than 1/100, not to 

make traps, and not to make air-bleeding 

Check if the drainage is correctly done during commissioning and ensure the space for inspection and 

maintenance.

Ensure the insulation on the pipes for refrigeration circuit so as not to condense water.

Incomplete insulation could cause condensation and it would wet ceiling, floor, and any other valuables.

Do not install the outdoor unit where is likely to be a nest for insects and small animals.

Insects and small animals could come into the electronic components and cause breakdown and fire. Instruct the 

user to keep the surroundings clean.

Pay extra attention, carrying the unit by hand.

Carry the unit with 2 people if it is heavier than 20kg. Do not use the plastic straps but the grabbing place, moving 

the unit by hand. Use protective gloves in order to avoid injury by the aluminum fin.

Make sure to dispose of the packaging material.

Leaving the materials may cause injury as metals like nail and woods are used in the package.

Do not operate the system without the air filter.

It may cause the breakdown of the system due to clogging of the heat exchanger.

Do not touch any button with wet hands.

It could cause electric shock.

Do not touch the refrigerant piping with bare hands when in operation.

The pipe during operation would become very hot or cold according to the operating condition, and it could cause 

a burn or frostbite.

Do not clean up the air conditioner with water.

It could cause electric shock.

Do not turn off the power source immediately after stopping the operation.

Be sure to wait for more than 5 minutes. Otherwise it could cause water leakage or breakdown.

Do not control the operation with the circuit breaker.

It could cause fire or water leakage. In addition, the fan may start operation unexpectedly and it may cause injury.

CAUTION

Before installation

Install correctly according to the installation manual.

Confirm the following points:

Unit type/Power supply specification

Pipes/Wires/Small parts

Accessory items

Accessory itme

For unit hanging

For refrigerant pipe

For draom pipe

Flat washer 

(M10)

Level gauge

(Insulation)

Pipe cover(big)

Pipe cover 

(small)

Strap

Pipe cover(big) Pipe cover(small)

Drain hose

Hose clamp

8

4

1

1

4

1

1

1

1

For unit hanging

For adjustment 
in hoisting in the 
unit's main body

For heat 
insulation
of gas pipe 

For heat 
insulation
of liquid tube

For pipe cover 
fixing

For heat 
insulation
of drain socket

For heat 
insulation
of drain socket

For drain pipe 
connecting

For drain hose
mounting

Selection of installation location for the indoor unit

1

Select the suitable areas to install the unit under approval of the user.

 

Areas where the indoor unit can deliver hot and cold wind sufficiently. Suggest to the user to use 
a circulator if the ceiling height is over 3m to avoid warm air being accumulated on the ceiling.

 

Areas where there is enough space to install and service.

 

Areas where it can be drained properly. Areas where drain pipe descending slope can be taken.

 

Areas where there is no obstruction of airflow on both air return grille and air supply port.

 

Areas where fire alarm will not be accidentally activated by the air conditioner.

 

Areas where the supply air does not short-circuit.

 

Areas where it is not influenced by draft air.

 

Areas not exposed to direct sunlight.

 

Areas where dew point is lower than around 28°C and relative humidity is lower than 80%.
This indoor unit is tested under the condition of JIS (Japan Industrial Standard) high humidity 
condition and confirmed there is no problem. However, there is some risk of condensation drop 
if the air conditioner is operated under the severer condition than mentioned above.
If there is a possibility to use it under such a condition, attach additional insulation of 10 to 
20mm thick for entire surface of indoor unit, refrigeration pipe and drain pipe.

 

Areas where TV and radio stays away more than 1m. (It could cause jamming and noise.)

 

Areas where any items which will be damaged by getting wet are not placed such as food, table 
wares, server, or medical equipment under the unit.

 

Areas where there is no influence by the heat which cookware generates.

 

Areas where not exposed to oil mist, powder and/or steam directly such as above fryer.

 

Areas where lighting device such as fluorescent light or incandescent light doesn’t affect the 
operation.
(A beam from lighting device sometimes affects the infrared receiver for the wireless remote 
controller and the air conditioner might not work properly.)

2

Check if the place where the air conditioner is installed can hold the weight of the unit. If it is not 
able to hold, reinforce the structure with boards and beams strong enough to hold it. If the strength 
is not enough, it could cause injury due to unit falling.

3

If there are 2 units of wireless type, keep them away for more than 5m to avoid malfunction due to 
cross communication.

4

When plural indoor units are installed nearby, keep them away for more than 4m.

Space for installation and service

When it is not possible to keep enough space between indoor unit and wall or between indoor units, 
close the air supply port where it is not possible to keep space and confirm there is no short circuit 
of airflow.

Install the indoor unit at a height of more than 2.5m above the floor.

ti

n

u

r

o

o

d

n

I

ti

n

u

r

o

o

d

n

I

Wall

Ceiling
surface

Decorative panel

1000mm or more

4000mm or more

1000mm or more

2500mm or more

Obstacle

Floor

Preparation before installation

If suspension bolt becomes longer, do reinforcement of earthquake resistant.

For grid ceiling
When suspension bolt length is over 500mm, or the gap between the ceiling and roof is over 
700mm, apply earthquake resistant brace to the bolt.

In case the unit is hanged directly from the slab and is installed on the ceiling plane which has 
enough strength.
When suspension bolt length is over 1000mm, apply the earthquake resistant brace to the bolt.

Prepare four (4) sets of suspension bolt, nut and spring washer (M10 or M8) on site.

Ceiling opening, Suspension bolts pitch, Pipe position

Installation of indoor unit

Work procedure

1. This units is designed for 2 x 2 grid ceiling.

If necessary, please detach the T bar temporarily before you install it.
If it is installed on a ceiling other than 2 x 2 grid ceiling, provide an inspection port on the control box 
side.

2. Arrange the suspension bolt at the right position (530mm×530mm). 
3. Make sure to use four suspension bolts and fix them so as to be able to hold 500N load.
4. Ensure that the lower end of the suspension bolt should be 45mm above the ceiling plane. 

Temporarily put the four lower nuts 88mm above the ceiling plane and the upper nuts on distant 
place from the lower nuts in order not to obstruct hanging the indoor unit or adjust the indoor unit 
position, and then hang the indoor unit.

T bar Ceiling

panel

Control box

5. Adjust the indoor unit position after hanging it by inserting the level gauge attached on the package 

into the air supply port and checking if the gap between the ceiling plane and the indoor unit is 
appropriate. In order to adjust the indoor unit position, adjust the lower nuts while the upper nuts are 
put on distant place. Confirm there is no backlash between the hanger plate for suspension bolt and 
the lower nut and washer.

88mm

Suspension bolt

Nut (upper)

Flat washer

Spring washer

Nut (lower)

Ceiling surface

45mm

Refrigerant piping

Drain piping

Level gauge

30

30

Level gauge

T-bar

Ceiling panel

 (insulation)

Use level gauges as

reference, adjust the 

bottom to the face of 

the indoor unit.

Diffuser

Level gauge
 (insulation)

T-bar

Ceiling panel

Use level gauges as

reference, adjust the 

bottom to the face of 

the indoor unit.

When the ceiling panel comes below the T

bar, align the bottom of the level gauge to

the lower face of the ceiling panel.

Diffuser

Unit

Correct

Unit

Wrong

Touch the nut (lower) and 

washer without any play

Play is left between the fixture

and the nut (lower) and washer.

A

B

C

E

F

F

F

D

F

6-

φ

4

D

E

C

B

A

Symbol Content

Air outlet opening

for ducting

F

Gas piping

Liquid piping

Drain piping

Hole for wiring

Suspension bolts

Decorative panel

Air supply

Air return

grille

Hanger plate for

suspension bolt

(Installed on site)

Drain hose piece

(Accessory)

Control

box

Holes for

tapping screws

Hole

145

325

570

45 or more

132

192

35

88

210

248

185
190

223

326

350

530(

Suspension bolts pitch)

530 (Suspension bolts pitch)

556

67

200

48

413

700

21

35

60

140

100

100

88

140

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PJA012D786

Summary of Contents for SRR60ZJ-S

Page 1: ...M45ZJ S SCM50ZJ S SCM60ZJ S SCM71ZJ S SCM80ZJ S INDOOR UNIT Wall mounted type SRK20ZJX S SRK25ZJX S SRK35ZJX S SRK50ZJX S SRK60ZJX S SRK20ZJ S SRK25ZJ S SRK35ZJ S SRK50ZJ S Floor standing type SRF25ZJ...

Page 2: ...control function by remote controller 5 Flap and louver control 10 4 Custom cord switching procedure 9 3 Auto restart function 2 Unit ON OFF button 8 5 1 Remote controller Option parts 19 3 Operation...

Page 3: ...2 7 Heating low outdoor temperature protective control 36 9 Crankcase heater 37 10 Inching prevention 8 Freezing cycle system protective control 36 36 1 Frost prevention control 33 2 Cooling overload...

Page 4: ...series 63 5 1 Installation of outdoor unit 127 5 2 Installation of indoor unit 139 11 Outdoor unit inspection points 59 76 2 Troubleshooting 58 10 How to make sure of wireless remote controller 1 List...

Page 5: ...FDTC Ceiling cassette 4 way compact type JX S Example Outdoor unit SCM 60 Z Series code Inverter type Product capacity Model name Outdoor unit J S Capacity Model Floor standing type SRF Outdoor unit t...

Page 6: ...ER ECONOMY mode HI POWER ECONO button These buttons set the indoor temperature These buttons are used for setting the current time and timer function as well TEMPERATURE button This button selects ON...

Page 7: ...be used for turning on off the unit when remote controller is not available Remote controller signal receiver RUN HOT KEEP light green blue Illuminates during operation green except ECONO operation bl...

Page 8: ...ZJX S Unit display section AIR SELECTION button AIR OUTLET SELECTION light green Illuminates during upper air outlet operation TIMER light yellow Illuminates during TIMER operation This button can be...

Page 9: ...en the remote controller batteries become weak or if the remote controller is lost or malfunctioning this button may be used to turn the unit on and off a Operation Push the button once to place the u...

Page 10: ...sabled See the diagram at right ModelSRK20 60ZJX S Model SRK20 50ZJ S SRF25 50ZJX S SRR25 60ZJ S Jumper wire J170 Jumper wire JA1 4 Custom cord switching procedure If two wireless remote controller ar...

Page 11: ...75 Swing Flap stopped Approx 45 Approx 60 Approx 60 Angle of Flap from Horizontal Mode SRK20 60ZJX S COOL DRY FAN Remote controller display HEAT Approx 10 Approx 25 Approx 25 Approx 40 Approx 40 Appro...

Page 12: ...ries Control the flap by AIRFLOW UP DOWN button on the wireless remote controller a Flap Each time when you press the AIRFLOW UP DOWN button the mode changes as follows b Swing 1 Swing flap Flap moves...

Page 13: ...the start or until indoor temperature is close to reaching the setting point And then the air outlet will change to both outlets in order to spread comfort air to every corner 2 HEAT operation a In c...

Page 14: ...lowing Fixed Operation mode Indoor temp Setting temp 2 C Setting temp Indoor temp 2 C At heating At cooling Air flow direction contorol 2 C Setting temp Indoor temp 5 C 2 C Indoor temp Setting temp 5...

Page 15: ...installation location while the installation location setting display illuminates Airflow range Airflow range Airflow range Left End Installation Center Installation Right End Installation Center Ins...

Page 16: ...stop 2 Inciuding the Fan operation according to the mismatch of operation modes 1 Control A a If the float switch detects any anomalous draining condition the unit stops with the anomalous stop and t...

Page 17: ...alid Operation is displayed but it does not mean a failure Cover AIR CON No button Display the indoor unit number connected to this remote controller CHECK button This button is used at servicing TEST...

Page 18: ...when this is pressed once again it stops operating Used to swing the louver Every time this button is pressed displays switch as below Sets room temperature by pressing or button Sets time when settin...

Page 19: ...Operation mode Airflow volume mode Room temperature setting Louver auto swing stop However the stop position 4 position is cancelled so that it returns to Position 1 Remote controller function items w...

Page 20: ...Outdoor unit fan Indoor unit fan Louver motor Drain pump 3 2 2 Thermostat ON Thermostat OFF 2 2 Note 1 Operation Stop Turned ON OFF by the control other than the room temperature control 2 ON during...

Page 21: ...er ON This is not displayed under the Remote mode 2 If this display is not shown under the Center Remote mode check if the indoor unit power switch is turned on or not f Hot start Cold draft preventio...

Page 22: ...ensor is effective i Filter sign As the operation time Total ON time of ON OFF switch accumulates to 180 hours 1 FILTER CLEANING is displayed on the remote controller This is displayed when the unit i...

Page 23: ...change of operation mode If the thermostat is turned OFF during the forced operation control of heating compressor the louver position with the auto swing is returned to the level position Note 1 The...

Page 24: ...oling operation SRC40 60 FDC100 140 Model Symbol A 4 4 1 1 1 0 1 0 2 5 2 5 B C D 2 Selection of indoor fan speed If it enters the frost prevention control during cooling operation excluding dehumidify...

Page 25: ...ing procedure Signal wiring between indoor and outdoor units should be made on each unit same as the normal wiring For the group control lay connect with sires wiring between rooms using terminal bloc...

Page 26: ...l and start stop operation of the unit from the wired remote controller becomes not available 2 In case that Operation permission prohibition mode setting is Valid and External input setting is Pulse...

Page 27: ...T 6 input Unit A Unit B Note The latest operation has priority It is available to operate stop by remote controller or center controller b In case of Pulse input setting Local setting It is effective...

Page 28: ...sampling present number of revolutions of indoor unit fan speed is reduced by 10min 1 3 End conditions Indoor fan speed is reduced to the setting airflow volume when the compressor OFF is established...

Page 29: ...S 1 5 7 6 kW SCM71ZJ S 1 5 9 1 kW SCM80ZJ S 1 5 9 5 kW 3 Hot keep operation If the hot keep operation is selected during the heating operation the indoor fan is controlled based on the temperature of...

Page 30: ...n 20 20 15 10 5 0 5 10 15 10 5 0 Outdoor air temperature Outdoor heat exchanger temperature Defrost operation start Defrost operation start temperature b h 2 2 h 20 3 Max 12 minutes and 50 seconds Hea...

Page 31: ...nit fan Compressor Outdoor unit fan Electronic expansion valve ON According to command speed According to outdoor unit speed According to decision speed 0 All indoor units OFF According to stop mode A...

Page 32: ...SRK SRR series b 1 2 3 c d 27 5 25 5 18 0 18 30 2 SRK 20 50ZJ S series a Determination of operation mode Heating Dehumidifying Cooling Indoor air temperature C Outdoor air temperature C Signals of wir...

Page 33: ...an start and stop the operation When the jumper wire J3 is released Permission Prohibition mode When Cnt input is set to ON the operation mode is changed to permission and if input is set to OFF the o...

Page 34: ...ol s indoor unit settings Input signal to CnT becomes valid at OFF ON only and the motion of air conditioner ON OFF is inverted CnT Input Unit CASE A Unit CASE B OFF OFF ON ON OFF ON OFF ON ON OFF OFF...

Page 35: ...speed is set to B or D rps and even if the speed becomes lower than B or D rps the speed is kept to B or D rps However when the thermo becomes OFF the speed is reduced to 0 rps The upper limit of com...

Page 36: ...ly 2 Contents of control Compressor stop 3 Release condition When the indoor heat exchanger temperature Th2 has become lower than the release tempera ture b Outdoor unit side 1 Start condition When th...

Page 37: ...tdoor air temperature Th2 is 10 C or lower after the compressor stops 8 Freezing cycle system protective control a Starting condition This control starts when the following conditions are met 1 When i...

Page 38: ...when it exceeds the control value 1 Switching with jumper wire Jumper wire J2 Short circuit At shipping from factory Short circuit Jumper wire J1 Short circuit At shipping from factory Current safe C...

Page 39: ...20 rps 60 rps SCM60ZJ S 20 rps 60 rps SCM80ZJ S 20 rps 60 rps SCM71ZJ S a The fan operates as follows according to the compressor command speed Except during defrost Cooling Heating Compressor speed r...

Page 40: ...ut 85 or less Outdoor fan speed 6th speed 5th speed More than 31 but 66 or less 4th speed 3rd speed Less than 31 More than 46 66 or more but 66 or less 6th speed 5th speed More than 31 but 46 or less...

Page 41: ...ondition When the outdoor air temperature Th2 has risen higher than 13 C for 30 seconds continuously while the compressor is operating b Contents of control The outdoor unit fan tap is brought down by...

Page 42: ...H I 8 7 5 4 405 1 7 55 7 056 8 05 5 50 1 0 7 7 4 5 7 55 7 1 7 4 H 1 8 50 J1 1 G07 G 4G 5H 3 Troubleshooting procedure If the air conditioner does not run at all 8 0 7 5 0 0 5 1 5 5 44 0 65 1 8 34 1056...

Page 43: ...42 10 SCM SM 094 4 Troubleshooting procedure If the air conditioner runs NO NO NO NO YES YES YES YES 43 44 50 44 50...

Page 44: ...pole positions cannot be correctly detected when the compressor starts The air conditioner stops Defective compressor Open phase on compressor Defective outdoor PCB Service valve is closed Refrigeran...

Page 45: ...indoor unit Data are recorded for up to 5 previous occurrences Data which are older than the 5th previous occurrence are erased In addition data on the temperature of each sensor room temperature indo...

Page 46: ...6 865 4 6 45 A 11 1 8 B F65 4 5 1 14 1 5 5 1 14 1 4 6 11 1 8 D45 865 4 8 6 45 F65 4 5 6 8 1 4 Q 4 1 5 5 1 14 1 4 6 11 1 8 D45 865 4 8 6 45 F65 4 5 1 1 1 6 2 1 4 6 4 6 11 1 8 D45 865 4 8 6 45 F65 4 5...

Page 47: ...n for the stop stop code 2 times previous when the air conditioner was stopped by protective stop control Displays the reason for the stop stop code 3 times previous when the air conditioner was stopp...

Page 48: ...ght 1 s digit Stop coad or Error coad Error content Cause Occurrence conditions Error display Auto recovery OFF 3 time flash 5 time flash 6 time flash 8 time flash 4 time flash 2 times 2 times 3 times...

Page 49: ...Display pattern when in service mode Operation switching when there is an abnormal stop 0 1 2 4 3 AUTO DRY COOL FAN HEAT C N5 6 678 8 A TIMER light Fan speed switching Display pattern when in service...

Page 50: ...34 44 54 64 74 84 94 55 45 35 25 15 5 5 15 25 35 45 55 65 75 85 95 56 46 36 26 16 6 6 16 26 36 46 56 66 76 86 96 57 47 37 27 17 7 7 17 27 37 47 57 67 77 87 97 58 48 38 28 18 8 8 18 28 38 48 58 68 78 8...

Page 51: ...0 10 30 50 70 90 110 130 150 52 32 12 12 32 52 72 92 112 132 54 34 14 14 34 54 74 94 114 134 56 36 16 16 36 56 76 96 116 136 58 38 18 18 38 58 78 98 118 138 No does not sound 0 12 3 456 7 1284 9 7 2 2...

Page 52: ...51 10 SCM SM 094 09 SRK DB 087D Service data record form 45...

Page 53: ...10 40 50 60 70 0 10 Discharge pipe sensor temperature characteristics Indoor fan motor error Broken sensor wire connector poor connection 0 0 20 40 60 80 100 120 135 20 40 60 80 100 120 140 160 180 T...

Page 54: ...Current cut Compressor lock Compressor wiring short circuit Compressor output is open phase Outdoor PCB is faulty Service valve is closed EEV is faulty Compressor faulty Current safe stop Overload ope...

Page 55: ...094 09 SRK DB 087D Over heat of compressor Gas shortage defective discharge pipe sensor Error of signal transmission Wiring error including power cable defective indoor outdoor PCB 52 main indoor indo...

Page 56: ...tor error Defective fan motor connector poor connection defective outdoor PCB Power supply reset Is it normalized Malfunction by temporary noise Replace fan motor If the error persists after replacing...

Page 57: ...r unit Defective compressor defective outdoor PCB Sensor Operation mode Phenomenon Shortcircuit Disconnected wire Room temperature sensor Cooling Heating Heat exchanger sensor Cooling Heating Humidity...

Page 58: ...15 A YES YES YES NO NO NO b Indoor unit fan motor check procedure 1 Indoor PCB output check 2 Fan motor resistance check FMI DC15V Indoor PCB DC 308 336V DC several V 4 6 V CNU GND Blue Yellow White...

Page 59: ...m burns wiring mistakes etc If no problems are found check the output of the power transistor 2 Output inspection procedure Disconnect the terminals for the compresseor If an output such as the one sh...

Page 60: ...of resistance value of sensor Remove the connector and check the resistance value See the section of sensor characteristics on page 52 Power source and serial signal inspection to AC 220 230 240V to N...

Page 61: ...inspection to AC 220 230 240V to Normal if the voltage oscillates between DC 0 and approx 20V UNIT A UNIT B UNIT C Power supply 1 Phase 220 240V 50Hz Inspection of electronic expansion valve See page...

Page 62: ...rmal if the voltage oscillates between DC 0 and approx 20V UNIT A UNIT B UNIT C UNIT D Power supply 1 Phase 220 240V 50Hz Inspection of electronic expansion valve See page 62 Color Marks Mark Color BK...

Page 63: ...ansion valve as a separate unit Measuring point Resistance when normal b Outdoor unit fan motor check procedure 2 Fan motor resistance check Measuring point Resistance when normal Measuring point Resi...

Page 64: ...hanger tempera ture thermistor Defective indoor heat exchanger temperature thermistor defective element broken wire short circuit Poor contact of temperature thermistor connector Replacement repair of...

Page 65: ...air of temperature sensor 104 Outdoor main PCB Defective outdoor main PCB Defective temperature sensor input circuit Replacement of PCB Stays OFF Keeps flashing 1 time flash Outdoor main PCB compresso...

Page 66: ...with one remote controller Whenever excessively connected indoor units is detected after power ON Return air temperature thermistor anomaly 50 C or lower is detected for 5 seconds continuously within...

Page 67: ...ger remote controller switch and fuse Note 1 With regard to parts of high voltage circuits and refrigeration cycle judge it according to ordinary inspection methods b Instruction of how to replace ind...

Page 68: ...CB Parts mounting are different by the kind of PCB ON OFF Part number SW2 Blue Address setting SW5 Master Slave setting SW7 Function setting CNT Blue External switch CNJ White Louver motor CNN Yellow...

Page 69: ...ing connector color should match with the color of connector of the PCB Note 2 6 Let the wiring red and blue pass beneath the yellow green wiring and bind together with band 7 Screw back the terminal...

Page 70: ...l mode Valid Reserved keep OFF Test run Drain motor Normal Test run Valid Invalid Normal Model selection As per model See table 1 Remarks Address No setting at plural indoor units control by 1 R C 0 F...

Page 71: ...press the button which allows you to go back to the indoor unit selection screen Pressing the button will stop displaying data Pressing the RESET button during remote control unit operation will undo...

Page 72: ...ctively b Operation for judgment 1 Power ON and start check operation on cooling or heating mode 2 Check ON OFF status of 6 LED s on the checker 3 Judge the PCB by ON OFF status of 6 LED s on the chec...

Page 73: ...nspection to AC 220 230 240V to Normal if the voltage oscillates between DC 0 and approx 20V Color Marks Mark Color BK BR Black Brown RD Y G Red Yellow Green WH White OR Orange EEV S BK WH RD V W U FM...

Page 74: ...voltage oscillates between DC 0 and approx 20V UNIT A UNIT B UNIT C Power supply 1 Phase 220 240V 50Hz EEV S BK WH RD V W U FMo CM R CNTH CNFAN S 2 BK WH WH S 1 CNSUB CNMAIN SIN RIN BK WH SO RO 250V...

Page 75: ...d approx 20V UNIT A UNIT B UNIT C UNIT D Power supply 1 Phase 220 240V 50Hz Color Marks Mark Color BK BR Black BL Blue BR Brown Brown RD Y G Red Yellow Green WH White OR Orange YE Yellow EEV S BK WH R...

Page 76: ...rature thermistor anomaly 92 16 E7 Return air temperature thermistor anomaly 93 17 E8 Heating overload operation 94 18 E9 Drain trouble 95 19 E10 Excessive number of connected indoor units more than 1...

Page 77: ...mpressor or other respective parts NO YES YES NO YES YES YES NO NO Is the compressor operating NO YES NO Note 1 Outdoor 35 C Indoor 27 C 1 WAIT It is normal This unit is designed to start in the soft...

Page 78: ...s phenomenon NO YES YES NO YES YES YES NO NO Is the compressor operating NO YES NO Note 1 Outdoor 7 C Indoor 20 C 1 WAIT It is normal This unit is designed to start in the soft start mode by detecting...

Page 79: ...power supply the insulation resistance may drop to a few M because of refrigerant migrated in the compressor When the earth breaker is activated at lower insulation resistance check the following poin...

Page 80: ...nto the gap if necessary Prevent the vibration from transmitting to wall and etc by fixing pipes on the wall or wrapping rubber cushion around the pipe which goes through the hole in the wall or apply...

Page 81: ...side of piping of air conditioner It is likely to occur particularly during cooling or defrosting in the heating mode It is normal The noise vibration occurs when the refrigerant starts or stops flowi...

Page 82: ...n of air nitrogen etc In such occasion it is necessary to recover refrigerant vacuum dry and recharge refrigerant Since there could be many causes of noise vibration the above do not cover all In such...

Page 83: ...locked Check at the indoor unit side LM louver motor Is the louver operable with the remote controller YES NO Does the louver operate at the power on YES NO YES NO Operate after waiting for more than...

Page 84: ...LM etc OK NO NO 1 Note 1 for GND Is DC5V detected between of CNW2 NO Is AC220 240V for 1 phase unit detected between 1 and 2 on the terminal block of outdoor unit YES YES YES YES Is JX1 open Defective...

Page 85: ...broken or short circuited Is DC180V between of CNW2 Disconnect remote controller wires NO Is DC15V or higher detected between X Y of indoor unit terminal block YES YES YES YES NO NO NO Correct Replace...

Page 86: ...he connecting wire between the indoor and outdoor unit Power supply reset NO YES YES NO NO NO NO NO YES YES YES Set one remote controller for Master and the other for Slave Set SW1 on remote controlle...

Page 87: ...on with remote controller 3 Condition of Error displayed Same as above 4 Presumable cause Improper setting Surrounding environment Defective remote controller communication circuit Faulty indoor cont...

Page 88: ...t terminal block YES NO Is approx DC20V detected between on the indoor unit terminal block NO YES WAIT See next page Defective outdoor sub PCB Replace Defective indoor control PCB Replace Replace indo...

Page 89: ...eplacing the power supply fuse Diagnosis Countermeasure Replace the outdoor sub PCB YES YES NO YES Replace the outdoor main PCB NO Replace the reactor NO Isn t there a short circuit between phases of...

Page 90: ...emote controller side after disconnecting the remote controller Are wires connected properly between the indoor and the outdoor units Is approx DC20V detected between on the outdoor unit terminal bloc...

Page 91: ...en after 3 minutes Power reset NO WAIT Malfunction by noise Check peripheral environment Defective indoor control PCB Replace Defective remote controller Replace 2 Error detection method When normal c...

Page 92: ...ection looseness on the outdoor unit terminal block Power reset Note 2 Check for faulty connection or breakage of signal wires between indoor outdoor units YES NO YES NO Repair signal wires Repair sig...

Page 93: ...indoor heat exchanger temperature thermistor Replace Defective indoor control PCB Replace Defective indoor unit heat exchanger temperature thermistor input circuit 2 Error detection method Anomalousl...

Page 94: ...rect Connect connector Defective return air temperature thermistor Replace Defective indoor control PCB Replace Defective return air temperature thermistor input circuit 2 Error detection method Anoma...

Page 95: ...Note 2 For characteristics of indoor heat exchanger temperature thermistor see the error display E6 YES NO YES NO Error stop Reset Indoor heat exchanger temperature C 56 63 Wash Defective indoor heat...

Page 96: ...Is the drain pipe slop OK NO YES NO Defective indoor control PCB Replace Defective indoor control PCB Replace Check optional equipment Correct setting to Humidifier DM interlock Defective indoor power...

Page 97: ...del 5 Troubleshooting All models Diagnosis Countermeasure Aren t more than 17 indoor units connected to one remote controller NO YES Defective remote controller Replace Reduce to 16 or less units 2 Er...

Page 98: ...otor Check power voltage Replace faulty fan motor and power PCB Replace fan motor If the error persists after replacing the fan motor replace the indoor control PCB Malfunction by temporary noise 2 Er...

Page 99: ...oor control PCB ON E19 occurs when the power ON NO YES Defective indoor control PCB Defective SW7 Replace Turn SW7 1 on the indoor control PCB OFF and reset the power 2 Error detection method After in...

Page 100: ...er 3 minutes delay the compressor starts again automatically but if this error occurs again within 60 minutes after the initial detection 4 Presumable cause Faulty connection of remote controller temp...

Page 101: ...unit side Isn t the air circulation of outdoor unit short circuited Are installation spaces adequate Isn t there any fouling or clogging on heater exchanger Control operation check Defective outdoor...

Page 102: ...39 YES NO NO Replace discharge pipe temperature sensor Insufficient refrigerant amount Recharge refrigerant by weighing proper amount on a scale Control operation check Defective outdoor main PCB Repl...

Page 103: ...uit Correct connector Defective outdoor heat exchanger temperature sensor Replace Defective outdoor main PCB Replace Defective outdoor heat exchanger temperature sensor input circuit 2 Error detection...

Page 104: ...rect connector Defective outdoor air temperature sensor Replace Defective outdoor main PCB Replace Defective outdoor air temperature sensor input circuit 2 Error detection method Detection of anomalou...

Page 105: ...perature C Broken wire Shot circuit Correct connector Defective discharge pipe temperature sensor Replace Defective outdoor main PCB Replace Defective temperature sensor input circuit 2 Error detectio...

Page 106: ...NO NO NO Check power supply Open the valves Check refrigerant amount and refregerant circuit In case of transitional increase of high pressure and or test run several times restarting may recover it b...

Page 107: ...the filter clogged At heating does the indoor fan motor run Are the service valves fully opened Is the filter clogged Is there any liquid flooding Is the superheat within normal range Is the low press...

Page 108: ...en the main PCB and the outdoor sub PCB connected properly Is normal state restored YES NO NO NO Correct connector Check why power is not supplied to outdoor sub PCB Connect communication wire securel...

Page 109: ...for foreign matter like dust fouling etc YES Is voltage within the specified range NO Restore normal condition Restore normal condition Remove foreign matter like dust fouling etc Defective outdoor su...

Page 110: ...n by temporary noise 2 Error detection method Detected by rotation speed of outdoor fan motor 3 Condition of Error displayed When actual rotation speed of outdoor fan motor drops to 75min 1 or lower f...

Page 111: ...is Countermeasure 2 Error detection method 3 Condition of Error displayed 4 Presumable cause Note If the power transistor primary current exceeds the setting value for 3 seconds the compressor stops P...

Page 112: ...rect connector Defective suction pipe temperature sensor Replace Defective outdoor sub PCB Replace Defective suction pipe temperature sensor input circuit 2 Error detection method Detection of anomalo...

Page 113: ...place Charge refrigerant Defective indoor control PCB Replace Defective indoor heat exchanger return air temperature thermistor input circuits 2 Error detection method Judge insufficient refrigerant a...

Page 114: ...or under Same as above Excessive refrigerant amount Indoor outdoor unit installation spaces Faulty compressor Defective outdor air temp sensor Defective outdoor main PCB Diagnosis Countermeasure 2 Err...

Page 115: ...Defective outdoor main PCB Replace Repalce compressor 2 Error detection method If it fails to change over to the rotor detection operation of compressor motor 3 Condition of Error displayed If compres...

Page 116: ...ompressor rotor position 3 Condition of Error displayed If it fails again to detect the rotor position after shifting to the compressor rotor position detection operation the compressor stops 4 Presum...

Page 117: ...lash Over heat of compressor 6Time flash Error of signal transmission 7Time flash Lock of compressor 8Time flash Sensor error Except discharge pipe sensor Four sec light and Discharge pipe sensor erro...

Page 118: ...sensor Outdoor air temp sensor Discharge pipe temp sensor CM Th1 Connector 20S 4 Way valve coil Suction pipe temp sensor Th4 FMo Fan motor Terminal block TB1 TB2 outdoor unit HEATER Crank case heater...

Page 119: ...is produced in the control box don t touch electrical parts in the control box for 5 minutes after cutting power supply CNA CN20S EEV A EEV B EEV C EEV D R Compressor motor Electric expansion valve c...

Page 120: ...5 IM RD WH RD WH BK BL Y Y G BK t Th2 1 Th2 2 Th3 LM1 LM2 SM1 SM2 FMI DS t t TO OUTDOOR UNIT HEAT EXCHANGER 1 2 N 3 POWER WIRES SIGNAL WIRE 1 2 N 3 Power source 1 phase 220 240 V 50Hz T Color Marks B...

Page 121: ...UNIT BK WH RD Y G HEAT EXCHANGER 2 N 3 Y G HD ONLY t o 2 t o R AMP 2 HEAT EXCHANGER 5 FMI SMI LM1 LM2 F Va ThI Th2 Th3 T DS Blue Black BK Red BL RD White WH Yellow Green Y G Color Mark Heat exch sens...

Page 122: ...l block T Damper motor DM1 SM1 2 1 2 Damper arm motor Description Item Varistor Va DM2 250V F G 3 15A S N Va CNU CNS INTERFACE KIT SC BIKN E CNG CNE DISPLAY WIRELESS RECEIVER J CNF U M HEAT 1 3 4 5 6...

Page 123: ...G 1 2 N 3 WH BK Y G RD S N J RD BK WH BOX CONTROL U 8 2 2 2 RD CNW M F 250V 0 16A RD OR 5 1 WH WH BK 2 BK 10 BK L CNS FM DM Th1 Th2 Th3 t TO OUTDOOR UNIT POWER WIRES SIGNAL WIRE 1 2 N 3 Power source...

Page 124: ...6 7 8 9 BK BK BK BK 10 BK 11 BK 12 BK 13 BK 14 BK 15 BK 16 BK 17 BK BK 18 BK 19 BK 20 BK 1 2 3 4 5 BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 I FS LM1...

Page 125: ...or Th1 Heat exchanger Heat exchanger Liquid line Gas line 6 35 6 35 9 52 9 52 Strainer Compressor 4 way valve Service valve Liquid Capillary tube Capillary tube Electric expansion valve EEVA EEVB Cool...

Page 126: ...Sensor Th2 Accumlator Sensor Th4 Service valve Liquid Electronic expansion valve Compressor 4way valve Discharge Suction Sensor Th1 Heat exchanger Cooling cycle Heating cycle 9 52 or 12 7 9 52 or 12...

Page 127: ...sor EEVA EEVD EEVC EEVB Strainer Discharge Suction Sensor Th3 Receiver Sensor Th4 Service valve Liquid Electronic expansion valve Compressor Oil separator 4way valve Sensor Heat exchanger Th2 Sensor T...

Page 128: ...water Be sure to switch off the power supply in the event of installation inspection or servicing If the power supply is not shut off there is a risk of electric shocks unit failure or personal injur...

Page 129: ...ned specifically for R410A Gauge for projection adjustment Used when flare is made by using conventional flare tool 9 10 11 12 13 14 15 16 Plus headed driver Knife Saw Tape measure Hammer Spanner wren...

Page 130: ...REFRIGERANT PIPINGS 3 Copper pipe diameter Clutch typr flare tool for R410A Conventional R22 flare tool Clutch type Wing nut type Measurement B mm 6 35 0 0 0 5 1 0 1 5 1 5 2 0 9 52 0 0 0 5 1 0 1 5 1 5...

Page 131: ...n and before turning on the power Conduct a test run again and ensure that the unit operates properly At the same time explain to the customer how to use the unit and how to take care of the unit foll...

Page 132: ...131 10 SCM SM 094 page139 and 160 25A 2 Models SCM50ZJ S 60ZJ S...

Page 133: ...132 10 SCM SM 094...

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Page 135: ...134 10 SCM SM 094...

Page 136: ...g operation valves before compressor stopping air can be sucked which can cause burst or personal injury due to anomalously high pressure in the refrigerant circuit Only use prescribed optional parts...

Page 137: ...ng and miscellaneous small parts Indoor unit installation manual Necessary tools for the installation work Wrench key Hexagon 4m m Vacuum pump Vacuum pump adapter Anti reverse flow type Designed speci...

Page 138: ...rom the aring block will vary depending on the type of a are tool in use If a conventional are tool is used please use a copper pipe gauge or a similar instrument to check protrusion so that you can k...

Page 139: ...failures therefore it shall never be done City water pipe Town gas pipe TV antenna lightning conductor telephoneline etc Check the following points again after completion of the installation and befor...

Page 140: ...ange the wiring in the control box so that it cannot be pushed up further into the box Install the service panel correctly Incorrect installation may result in overheating and fire Be sure to switch o...

Page 141: ...he flare nut by torque wrench with specified method If the flare nut were tightened with excess torque this may cause burst and refrigerant leakage after a long period The electrical installation must...

Page 142: ...for heat insulation Position it so that the slit area faces upward 9 5 A J 1G G J 1G G J 1G G 2 A H 9 5 A C 1 A 9 A C B 9 2 C 5 9 A A 2 3 8 A B A A B A A A 3 3 3 A 3 0 A A A 9 C A 5 A 2 1 2 4 0 0 002...

Page 143: ...t insulation Position it so that the slit area faces upward 9 5 A J 1G G J 1G G J 1G G 9 A C A A A A A B A C C C A A 9 0 5 A C A A C 5 C 21 2 9 2 A H 9 5 A C 1 A 9 A C B 9 2 C 5 9 A A 2 3 8 A B A A B...

Page 144: ...r any powder is floating Locations where any substances that can affect the unit such as sulphide gas chloride gas acid and alkaline can occur Vehicles and ships Locations where cosmetic or special sp...

Page 145: ...outlet air of the unit Locations where vibration can be amplified due to insufficient strength of structure Locations where the infrared receiver is exposed to the direct sunlight or the strong light...

Page 146: ...protrusion from the flaring block will vary depending on the type of a flare tool in use If a conventional flare tool is used please use a copper pipe gauge or a similar instrument to check protrusion...

Page 147: ...nventional flare tool Please note that measurement B protrusion from the flaring block will vary depending on the type of a flare tool in use If a conventional flare tool is used please use a copper p...

Page 148: ...n the event of installation inspection or servicing If the power supply is not shut off there is a risk of electric shocks unit failure or personal injury due to the unexpected start of fan CAUTION Us...

Page 149: ...ower before starting electrical work Failure to shut off the power can cause electric shocks unit failure or incorrect function of equipment Be sure to use the cables conformed to safety standard and...

Page 150: ...3 4 0 6 2 3 3 1 5 1 1 1 1 3 1 3 1 4 3 3 3 43 1 4 3 6 3 0 0 2 1 1 5 1 3 4 3 D 6 3 04 0 6 A 3 1 2 3 2 15 0 13 43 1 4 3 G K4 2 A 2 3 K4 5 5 6 3 7 61 8 C 2 2 4 8 0 3 2 5 5 A 118 43 0 1 3 1 3 0 1 341 2 6 0...

Page 151: ...1 0 0 2 5 24 3 2 6 1 7 A 3 6 1 B 13 6 1 43 1 3 0 1 1 3 0 0 1 2 2 1 6 A 0 A 5 1 3 73 1 1 0 13 6 3 43 1 3 0 2 0 3 0 0 2 3 6 3 3 3 412 3 1 43 3 3 3 0 0 3 3 2 7 3 6 1 0 0 2 3 3 6 6 3 02 33 1 5 3 1 3 1 A...

Page 152: ...151 10 SCM SM 094 127 and 138 3 Ceiling concealed type SRR...

Page 153: ...152 10 SCM SM 094...

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Page 156: ...155 10 SCM SM 094 4 Ceiling cassette 4way compact type FDTC...

Page 157: ...e installation If suspension bolt becomes longer do reinforcement of earthquake resistant For grid ceiling When suspension bolt length is over 500mm or the gap between the ceiling and roof is over 700...

Page 158: ...thin 5mm left to the nut Do not apply adhesives on this end Drain socket The step part Drain hose No adhesive allowed Drain socket Metal plate 10mm Hose clamp Fasten the screw within 5 mm left to the...

Page 159: ...provider of the country and be executed according to the technical standards and other regulations applicable to electrical installation in the country Be sure to use an exclusive circuit Use specifi...

Page 160: ...159 10 SCM SM 094 PJA012D783...

Page 161: ...M 094 Note This function is not able to be set with wireless remote controller or simple remote control RCH H3 For setting the swing range of other louvers return to 1 and proceed same procedure respe...

Page 162: ...ng Refrigeration Systems Headquarters 16 5 2 chome Kounan Minato ku Tokyo 108 8215 Japan Fax 03 6716 5926 Copyright MITSUBISHI HEAVY INDUSTRIES LTD Because of our policy of continuous improvement we r...

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