Toshiba RAV-SM2242DT-TR, RAV-SM2802DT-TR, RAV-SM2802DT-E User Manual
FILE NO. A10-001
Revised: May, 2010
SERVICE MANUAL
SPLIT TYPE
INDOOR UNIT <DIGITAL INVERTER>
RAV-SM2242DT-E
RAV-SM2802DT-E
RAV-SM2242DT-TR
RAV-SM2802DT-TR
R410A
PRINTED IN JAPAN, Apr., 2010 ToMo
CONTENTS
ORIGINAL INSTRUCTION................................................................................. 3
WARNING INDICATIONS ON THE AIR CONDITIONER UNIT.......................... 5
PRECAUTION FOR SAFETY ............................................................................ 6
NEW REFRIGERANT (R410A) ........................................................................ 11
1. SPECIFICATIONS .................................................................................... 13
1-1. Indoor Unit......................................................................................................... 13
2. CONSTRUCTION VIEWS (EXTERNAL VIEWS)....................................... 15
2-1. Indoor Unit......................................................................................................... 15
3. SYSTEMATIC REFRIGERATING CYCLE DIAGRAM .............................. 16
3-1. Indoor Unit......................................................................................................... 16
4. WIRING DIAGRAM ................................................................................... 17
4-1. Indoor Unit......................................................................................................... 17
4-2. Fan Characteristics .......................................................................................... 18
5. SPECIFICATIONS OF ELECTRICAL PARTS .......................................... 21
5-1. Indoor Unit......................................................................................................... 21
6. INDOOR CONTROL CIRCUIT.................................................................. 22
6-1. Indoor Controller Block Diagram ..................................................................... 22
6-2. Control Specifications...................................................................................... 23
6-3. Indoor Print Circuit Board................................................................................ 30
7. INDOOR UNIT TROUBLESHOOTING ...................................................... 32
7-1. Summary of Troubleshooting........................................................................... 32
8. REPLACEMENT OF SERVICE P.C. BOARD............................................ 51
8-1. Indoort Unit ....................................................................................................... 51
9. SETUP AT LOCAL SITE AND OTHERS .................................................. 55
9-1. Indoor Unit......................................................................................................... 55
9-2. Setup at Local Site / Others ............................................................................. 62
9-3. How to Set up Central Control Address Number ........................................... 64
10. ADDRESS SETUP .................................................................................... 66
10-1. Address Setup Procedure ................................................................................ 66
10-2. Address Setup & Group Control...................................................................... 67
10-3. Address Setup (Manual Setting from Remote Controller)............................. 69
11. OWNER’S MANIAL .................................................................................. 71
12. INSTALLATION MANUAL ........................................................................ 82
13. DETACHMENTS ..................................................................................... 102
11-1. Indoor Unit....................................................................................................... 102
14. EXPLODED VIEWS AND PARTS LIST .................................................. 106
12-1. Indoor Unit....................................................................................................... 106
– 2 –
Original instruction
Please read carefully through these instructions that contain important information which complies with the
“Machinery” Directive (Directive 2006/42/EC), and ensure that you understand them.
Some of the details provided in these instructions differ from the service manual, and the instructions provided
here take precedence.
Generic Denomination: Air Conditioner
Definition of Qualified Installer or Qualified Service Person
The air conditioner must be installed, maintained, repaired and removed by a qualified installer or qualified
service person.
When any of these jobs is to be done, ask a qualified installer or qualified service person to do them for you.
A qualified installer or qualified service person is an agent who has the qualifications and knowledge
described in the table below.
Agent
Qualified
installer (∗1)
Qualified service
person (∗1)
Qualifications and knowledge which the agent must have
• The qualified installer is a person who installs, maintains, relocates and removes the air
conditioners made by Toshiba Carrier Corporation.
He or she has been trained to install, maintain, relocate and remove the air conditioners made by
Toshiba Carrier Corporation or, alternatively, he or she has been instructed in such operations by
an individual or individuals who have been trained and is thus thoroughly acquainted with the
knowledge related to these operations.
• The qualified installer who is allowed to do the electrical work involved in installation, relocation
and removal has the qualifications pertaining to this electrical work as stipulated by the local laws
and regulations, and he or she is a person who has been trained in matters relating to electrical
work on the air conditioners made by Toshiba Carrier Corporation or, alternatively, he or she has
been instructed in such matters by an individual or individuals who have been trained and is thus
thoroughly acquainted with the knowledge related to this work.
• The qualified installer who is allowed to do the refrigerant handling and piping work involved in
installation, relocation and removal has the qualifications pertaining to this refrigerant handling
and piping work as stipulated by the local laws and regulations, and he or she is a person who
has been trained in matters relating to refrigerant handling and piping work on the air conditioners
made by Toshiba Carrier Corporation or, alternatively, he or she has been instructed in such
matters by an individual or individuals who have been trained and is thus thoroughly acquainted
with the knowledge related to this work.
• The qualified installer who is allowed to work at heights has been trained in matters relating to
working at heights with the air conditioners made by Toshiba Carrier Corporation or, alternatively,
he or she has been instructed in such matters by an individual or individuals who have been
trained and is thus thoroughly acquainted with the knowledge related to this work.
• The qualified service person is a person who installs, repairs, maintains, relocates and removes
the air conditioners made by Toshiba Carrier Corporation. He or she has been trained to install,
repair, maintain, relocate and remove the air conditioners made by Toshiba Carrier Corporation or,
alternatively, he or she has been instructed in such operations by an individual or individuals who
have been trained and is thus thoroughly acquainted with the knowledge related to these operations.
• The qualified service person who is allowed to do the electrical work involved in installation,
repair, relocation and removal has the qualifications pertaining to this electrical work as stipulated
by the local laws and regulations, and he or she is a person who has been trained in matters
relating to electrical work on the air conditioners made by Toshiba Carrier Corporation or,
alternatively, he or she has been instructed in such matters by an individual or individuals who
have been trained and is thus thoroughly acquainted with the knowledge related to this work.
• The qualified service person who is allowed to do the refrigerant handling and piping work
involved in installation, repair, relocation and removal has the qualifications pertaining to this
refrigerant handling
she is a person who has been trained in matters relating to refrigerant handling and piping
work on the air conditioners made by Toshiba Carrier Corporation or, alternatively, he or she
has been instructed in such matters by an individual or individuals who have been trained
and is thus thoroughly acquainted with the knowledge related to this work.
• The qualified service person who is allowed to work at heights has been trained in matters
relating to working at heights with the air conditioners made by Toshiba Carrier Corporation or,
alternatively, he or she has been instructed in such matters by an individual or individuals who
have been trained and is thus thoroughly acquainted with the knowledge related to this work.
and piping work as stipulated by the local laws and regulations, and he or
– 3 –
Definition of Protective Gear
When the air conditioner is to be transported, installed, maintained, repaired or removed, wear protective
gloves and ‘safety’ work clothing.
In addition to such normal protective gear, wear the protective gear described below when undertaking the
special work detailed in the table below.
Failure to wear the proper protective gear is dangerous because you will be more susceptible to injury, burns,
electric shocks and other injuries.
Work undertaken
All types of work
Electrical-related work
Work done at heights (50 cm or more)
Transportation of heavy objects
Repair of outdoor unit
Protective gloves
“Safety” working clothing
Gloves to provide protection for electricians and from heat
Insulating shoes
Clothing to provide protection from electric shock
Helmets for use in industry
Shoes with additional protective toe cap
Gloves to provide protection for electricians and from heat
Protective gear worn
The important contents concerned to the safety are described on the product itself and on this Service Manual.
Please read this Service Manual after understanding the described items thoroughly in the following contents
(Indications/Illustrated marks), and keep them.
[Explanation of indications]
Indication
Explanation
DANGER
WARNING
CAUTION
Indicates contents assumed that an imminent danger causing a death or serious injury of
the repair engineers and the third parties when an incorrect work has been executed.
Indicates possibilities assumed that a danger causing a death or serious injury of the
repair engineers, the third parties, and the users due to troubles of the product after work
when an incorrect work has been executed.
Indicates contents assumed that an injury or property damage (∗) may be caused on the
repair engineers, the third parties, and the users due to troubles of the product after work
when an incorrect work has been executed.
∗ Property damage : Enlarged damage concerned to property, furniture, and domestic animal/pet
[Explanation of illustrated marks]
Mark Explanation
Indicates prohibited items (Forbidden items to do)
The sentences near an illustrated mark describe the concrete prohibited contents.
Indicates mandatory items (Compulsory items to do)
The sentences near an illustrated mark describe the concrete mandatory contents.
Indicates cautions (Including danger/warning)
The sentences or illustration near or in an illustrated mark describe the concrete cautious contents.
– 4 –
Warning Indications on the Air Conditioner Unit
[Confirmation of warning label on the main unit]
Confirm that labels are indicated on the specified positions
If removing the label during parts replace, stick it as the original.
Warning indication
WARNING
ELECTRICAL SHOCK HAZARD
Disconnect all remote electric
power supplies before servicing.
WARNING
Moving parts.
Do not operate unit with grille removed.
Stop the unit before the servicing.
Description
WARNING
ELECTRICAL SHOCK HAZARD
Disconnect all remote electric power supplies
before servicing.
WARNING
Moving parts.
Do not operate unit with grille removed.
Stop the unit before the servicing.
CAUTION
High temperature parts.
You might get burned when removing
this panel.
CAUTION
Do not touch the aluminum fins of the unit.
Doing so may result in injury.
CAUTION
BURST HAZARD
Open the service valves before the
operation, otherwise there might be the
burst.
CAUTION
High temperature parts.
You might get burned when removing this panel.
CAUTION
Do not touch the aluminum fins of the unit.
Doing so may result in injury.
CAUTION
BURST HAZARD
Open the service valves before the operation,
otherwise there might be the burst.
– 5 –
Precaution for Safety
WARNING
Before starting to repair the air conditioner, read carefully through the Service Manual, and repair
the air conditioner by following its instructions.
Only qualified service person (∗1) is allowed to repair the air conditioner.
Repair of the air conditioner by unqualified person may give rise to a fire, electric shocks, injury,
water leaks and/or other problems.
Only a qualified installer (∗1) or qualified service person (∗1) is allowed to carry out the electrical
work of the air conditioner.
Under no circumstances must this work be done by an unqualified individual since failure to carry
out the work properly may result in electric shocks and/or electrical leaks.
Wear protective gloves and safety work clothing during installation, servicing and removal.
When connecting the electrical wires, repairing the electrical parts or undertaking other electrical
jobs, wear gloves to provide protection for electricians and from heat, insulating shoes and
clothing to provide protection from electric shocks.
Failure to wear this protective gear may result in electric shocks.
Use wiring that meets the specifications in the Installation Manual and the stipulations in the local
regulations and laws.
Use of wiring which does not meet the specifications may give rise to electric shocks, electrical
leakage, smoking and/or a fire.
Only a qualified installer (∗1) or qualified service person (∗1) is allowed to undertake work at
General
heights using a stand of 50 cm or more or to remove the intake grille of the indoor unit to
undertake work.
When working at heights, use a ladder which complies with the ISO 14122 standard, and follow
the procedure in the ladder’s instructions.
Also wear a helmet for use in industry as protective gear to undertake the work.
When working at heights, put a sign in place so that no-one will approach the work location,
before proceeding with the work.
Parts and other objects may fall from above, possibly injuring a person below.
Do not touch the aluminum fin of the outdoor unit.
You may injure yourself if you do so. If the fin must be touched for some reason, first put on
protective gloves and safety work clothing, and then proceed.
Do not climb onto or place objects on top of the outdoor unit.
You may fall or the objects may fall off of the outdoor unit and result in injury.
When transporting the air conditioner, wear shoes with additional protective toe caps.
When transporting the air conditioner, do not take hold of the bands around the packing carton.
You may injure yourself if the bands should break.
This air conditioner has passed the pressure test as specified in IEC 60335-2-40 Annex EE.
DENGER
Before carrying out the installation, maintenance, repair or removal work, be sure to set the circuit
breaker to the OFF position. Otherwise, electric shocks may result.
Before opening the intake grille of the indoor unit or service panel of the outdoor unit, set the
circuit breaker to the OFF position.
Failure to set the circuit breaker to the OFF position may result in electric shocks through contact
with the interior parts.
Turn off
breaker.
Only a qualified installer (∗1) or qualified service person (∗1) is allowed to remove the intake grille
of the indoor unit or service panel of the outdoor unit and do the work required.
Before starting to repair the outdoor unit fan or fan guard, be absolutely sure to set the circuit
breaker to the OFF position, and place a “Work in progress” sign on the circuit breaker.
When cleaning the filter or other parts of the indoor unit, set the circuit breaker to OFF without
fail, and place a “Work in progress” sign near the circuit breaker before proceeding with the work.
– 6 –
Execute
discharge
between
terminals.
Prohibition
Stay on
protection
WARNING
Check earth
wires.
Even if the circuit breaker has been set to the OFF position before the service panel is removed
and the electrical parts are repaired, you will still risk receiving an electric shock.
For this reason, short-circuit the high-voltage capacitor terminals to discharge the voltage before
proceeding with the repair work.
For details on the short-circuiting procedure, refer to the Service Manual.
You may receive an electric shock if the voltage stored in the capacitors has not been sufficiently
discharged.
Place a “Work in progress” sign near the circuit breaker while the installation, maintenance, repair
or removal work is being carried out.
There is a danger of electric shocks if the circuit breaker is set to ON by mistake.
If, in the course of carrying out repairs, it becomes absolutely necessary to check out the
electrical parts with the electrical parts box cover of one or more of the indoor units and the
service panel of the outdoor unit removed in order to find out exactly where the trouble lies, wear
insulated heat-resistant gloves, insulated boots and insulated work overalls, and take care to
avoid touching any live parts.
You may receive an electric shock if you fail to heed this warning. Only qualified service person
(∗1) is allowed to do this kind of work.
Before troubleshooting or repair work, check the earth wire is connected to the earth terminals of
the main unit, otherwise an electric shock is caused when a leak occurs.If the earth wire is not
correctly connected, contact an electric engineer for rework.
After completing the repair or relocation work, check that the ground wires are connected properly.
Be sure to connect earth wire. (Grounding work) Incomplete grounding causes an electric shock.
Do not connect ground wires to gas pipes, water pipes, and lightning rods or ground wires for
telephone wires.
Do not modify the products.Do not also disassemble or modify the parts.
It may cause a fire, electric shock or injury.
Prohibition of
modification.
Use specified
parts.
Do not bring
a child close to
the equipment.
Insulating
measures
No fire
When any of the electrical parts are to be replaced, ensure that the replacement parts satisfy the
specifications given in the Service Manual (or use the parts contained on the parts list in the
Service Manual).
Use of any parts which do not satisfy the required specifications may give rise to electric shocks,
smoking and/or a fire.
If, in the course of carrying out repairs, it becomes absolutely necessary to check out the
electrical parts with the electrical parts box cover of one or more of the indoor units and the
service panel of the outdoor unit removed in order to find out exactly where the trouble lies, place
"Keep out" signs around the work site before proceeding.
Third-party individuals may enter the work site and receive electric shocks if this warning is not
heeded.
Connect the cut-off lead wires with crimp contact, etc, put the closed end side upward and then
apply a water-cut method, otherwise a leak or production of fire is caused at the users’ side.
When performing repairs using a gas burner, replace the refrigerant with nitrogen gas because
the oil that coats the pipes may otherwise burn.
When repairing the refrigerating cycle, take the following measures.
1) Be attentive to fire around the cycle.
When using a gas stove, etc, be sure to put out fire before work; otherwise the oil mixed with
refrigerant gas may catch fire.
2) Do not use a welder in the closed room.
When using it without ventilation, carbon monoxide poisoning may be caused.
3) Do not bring inflammables close to the refrigerant cycle, otherwise fire of the welder may catch
the inflammables.
– 7 –
Refrigerant
Assembly/
Cabling
Insulator
check
Ventilation
Compulsion
The refrigerant used by this air conditioner is the R410A.
Check the used refrigerant name and use tools and materials of the parts which match with it.
For the products which use R410A refrigerant, the refrigerant name is indicated at a position on
the outdoor unit where is easy to see.
To prevent miss-charging, the route of the service port is changed from one of the former R22.
For an air conditioner which uses R410A, never use other refrigerant than R410A.
For an air conditioner which uses other refrigerant (R22, etc.), never use R410A.
If different types of refrigerant are mixed, abnormal high pressure generates in the refrigerating
cycle and an injury due to breakage may be caused.
Do not charge refrigerant additionally.
If charging refrigerant additionally when refrigerant gas leaks, the refrigerant composition in the
refrigerating cycle changes resulted in change of air conditioner characteristics or refrigerant over
the specified standard amount is charged and an abnormal high pressure is applied to the inside
of the refrigerating cycle resulted in cause of breakage or injury.
Therefore if the refrigerant gas leaks, recover the refrigerant in the air conditioner, execute
vacuuming, and then newly recharge the specified amount of liquid refrigerant.
In this time, never charge the refrigerant over the specified amount.
When recharging the refrigerant in the refrigerating cycle, do not mix the refrigerant or air other
than R410A into the specified refrigerant.
If air or others is mixed with the refrigerant, abnormal high pressure generates in the refrigerating
cycle resulted in cause of injury due to breakage.
After installation work, check the refrigerant gas does not leak.
If the refrigerant gas leaks in the room, poisonous gas generates when gas touches to fire such
as fan heater, stove or cocking stove though the refrigerant gas itself is innocuous.
Never recover the refrigerant into the outdoor unit.
When the equipment is moved or repaired, be sure to recover the refrigerant with recovering device.
The refrigerant cannot be recovered in the outdoor unit; otherwise a serious accident such as
breakage or injury is caused.
After repair work, surely assemble the disassembled parts, and connect and lead the removed
wires as before.
Perform the work so that the cabinet or panel does not catch the inner wires.
If incorrect assembly or incorrect wire connection was done, a disaster such as a leak or fire is
caused at user’s side.
After the work has finished, be sure to use an insulation tester set (500V Megger) to check the
resistance is 2MΩ or more between the charge section and the non-charge metal section
(Earth position).
If the resistance value is low, a disaster such as a leak or electric shock is caused at user’s side.
When the refrigerant gas leaks during work, execute ventilation.
If the refrigerant gas touches to a fire, poisonous gas generates.
A case of leakage of the refrigerant and the closed room full with gas is dangerous because a
shortage of oxygen occurs. Be sure to execute ventilation.
When the refrigerant gas leaks, find up the leaked position and repair it surely.
If the leaked position cannot be found up and the repair work is interrupted, pump-down and
tighten the service valve, otherwise the refrigerant gas may leak into the room.
The poisonous gas generates when gas touches to fire such as fan heater, stove or cocking stove
though the refrigerant gas itself is innocuous.
When installing equipment which includes a large amount of charged refrigerant such as a multi
air conditioner in a sub-room, it is necessary that the density does not the limit even if the
refrigerant leaks.
If the refrigerant leaks and exceeds the limit density, an accident of shortage of oxygen is caused.
Tighten the flare nut with a torque wrench in the specified manner.
Excessive tighten of the flare nut may cause a crack in the flare nut after a long period, which may
result in refrigerant leakage.
Nitrogen gas must be used for the airtight test.
The charge hose must be connected in such a way that it is not slack.
For the installation/moving/reinstallation work, follow to the Installation Manual.
If an incorrect installation is done, a trouble of the refrigerating cycle, water leak, electric shock or
fire is caused.
– 8 –
Check after
repair
Do not
operate the
unit with the
valve closed.
Check after
reinstallation
Cooling check
Installation
Once the repair work has been completed, check for refrigerant leaks, and check the insulation
resistance and water drainage.
Then perform a trial run to check that the air conditioner is running properly.
After repair work has finished, check there is no trouble. If check is not executed, a fire, electric
shock or injury may be caused. For a check, turn off the power breaker.
After repair work (installation of front panel and cabinet) has finished, execute a test run to check
there is no generation of smoke or abnormal sound.
If check is not executed, a fire or an electric shock is caused. Before test run, install the front
panel and cabinet.
Check the following matters before a test run after repairing piping.
• Connect the pipes surely and there is no leak of refrigerant.
• The valve is opened.
Running the compressor under condition that the valve closes causes an abnormal high
pressure resulted in damage of the parts of the compressor and etc. and moreover if there is
leak of refrigerant at connecting section of pipes, the air is suctioned and causes further
abnormal high pressure resulted in burst or injury.
Only a qualified installer (∗1) or qualified service person (∗1) is allowed to relocate the air
conditioner. It is dangerous for the air conditioner to be relocated by an unqualified individual
since a fire, electric shocks, injury, water leakage, noise and/or vibration may result.
Check the following items after reinstallation.
1) The earth wire is correctly connected.
2) The power cord is not caught in the product.
3) There is no inclination or unsteadiness and the installation is stable.
If check is not executed, a fire, an electric shock or an injury is caused.
When carrying out the pump-down work shut down the compressor before disconnecting the
refrigerant pipe.
Disconnecting the refrigerant pipe with the service valve left open and the compressor still
operating will cause air, etc. to be sucked in, raising the pressure inside the refrigeration cycle to
an abnormally high level, and possibly resulting in reputing, injury, etc.
When the service panel of the outdoor unit is to be opened in order for the compressor or the
area around this part to be repaired immediately after the air conditioner has been shut down, set
the circuit breaker to the OFF position, and then wait at least 10 minutes before opening the
service panel.
If you fail to heed this warning, you will run the risk of burning yourself because the compressor
pipes and other parts will be very hot to the touch. In addition, before proceeding with the repair
work, wear the kind of insulated heat-resistant gloves designed to protect electricians.
When the service panel of the outdoor unit is to be opened in order for the fan motor, reactor,
inverter or the areas around these parts to be repaired immediately after the air conditioner has
been shut down, set the circuit breaker to the OFF position, and then wait at least 10 minutes
before opening the service panel.
If you fail to heed this warning, you will run the risk of burning yourself because the fan motor,
reactor, inverter heat sink and other parts will be very hot to the touch.
In addition, before proceeding with the repair work, wear the kind of insulated heat-resistant
gloves designed to protect electricians.
Only a qualified installer (∗1) or qualified service person (∗1) is allowed to install the air
conditioner. If the air conditioner is installed by an unqualified individual, a fire, electric shocks,
injury, water leakage, noise and/or vibration may result.
Before starting to install the air conditioner, read carefully through the Installation Manual, and
follow its instructions to install the air conditioner.
Do not install the air conditioner in a location that may be subject to a risk of expire to a
combustible gas.
If a combustible gas leaks and becomes concentrated around the unit, a fire may occur.
Install the indoor unit at least 2.5 m above the floor level since otherwise the users may injure
themselves or receive electric shocks if they poke their fingers or other objects into the indoor unit
while the air conditioner is running.
Install a circuit breaker that meets the specifications in the installation manual and the stipulations
in the local regulations and laws.
Install the circuit breaker where it can be easily accessed by the qualified service person (∗1).
Do not place any combustion appliance in a place where it is directly exposed to the wind of air
conditioner, otherwise it may cause imperfect combustion.
– 9 –
Explanations given to user
• If you have discovered that the fan grille is damaged, do not approach the outdoor unit but set the circuit
breaker to the OFF position, and contact a qualified service person to have the repairs done. Do not set the
circuit breaker to the ON position until the repairs are completed.
Relocation
• Only a qualified installer (∗1) or qualified service person (∗1) is allowed to relocate the air conditioner.
It is dangerous for the air conditioner to be relocated by an unqualified individual since a fire, electric shocks,
injury, water leakage, noise and/or vibration may result.
• When carrying out the pump-down work shut down the compressor before disconnecting the refrigerant pipe.
Disconnecting the refrigerant pipe with the service valve left open and the compressor still operating will
cause air, etc. to be sucked in, raising the pressure inside the refrigeration cycle to an abnormally high level,
and possibly resulting in reputing, injury, etc.
(∗1) Refer to the “Definition of Qualified Installer or Qualified Service Person.”
Declaration of Conformity
Manufacturer: Toshiba Carrier Corporation
336 Tadehara, Fuji-shi, Shizuoka-ken 416-8521 JAPAN
Authorized Nick Ball
Representative/TCF holder: Toshiba EMEA Engineering Director
Toshiba Carrier UK Ltd.
Porsham Close, Belliver Industrial Estate,
PLYMOUTH, Devon, PL6 7DB.
United Kingdom
Hereby declares that the machinery described below:
Generic Denomination: Air Conditioner
Model/type: RAV-SM2242DT-E, RAV-SM2802DT-E
RAV-SM2242DT-TR, RAV-SM2802DT-TR
Commercial name: Digital Inverter Series
Complies with the provisions of the “Machinery” Directive (Directive 2006/42/EC) and the regulations
transposing into national law.
Complies with the provisions of the following harmonized standard:
EN 378-2: 2008
Note: This declaration becomes invalid if technical or operational modifications are introduced without the
manufacturer’s consent.
Specifications
Model
RAV-SM2242DT-E
RAV-SM2802DT-E
RAV-SM2242DT-TR
RAV-SM2802DT-TR
Sound power level (dB)
Cooling Heating
74 74
75 75
74 74
75 75
Weight (kg)
160
160
160
160
– 10 –
New Refrigerant (R410A)
This air conditioner adopts a new HFC type refrigerant (R410A) which does not deplete the ozone layer.
1. Safety Caution Concerned to New Refrigerant
The pressure of R410A is high 1.6 times of that of the former refrigerant (R22).
Accompanied with change of refrigerant, the refrigerating oil has been also changed.
Therefore, be sure that water, dust, the former refrigerant or the former refrigerating oil is not mixed into the
refrigerating cycle of the air conditioner with new refrigerant during installation work or service work.
If an incorrect work or incorrect service is performed, there is a possibility to cause a serious accident.
Use the tools and materials exclusive to R410A to purpose a safe work.
2. Cautions on Installation/Service
1) Do not mix the other refrigerant or refrigerating oil.
For the tools exclusive to R410A, shapes of all the joints including the service port differ from those of
the former refrigerant in order to prevent mixture of them.
2) As the use pressure of the new refrigerant is high, use material thickness of the pipe and tools which are
specified for R410A.
3) In the installation time, use clean pipe materials and work with great attention so that water and others
do not mix in because pipes are affected by impurities such as water, oxide scales, oil, etc.
Use the clean pipes.
Be sure to brazing with flowing nitrogen gas. (Never use gas other than nitrogen gas.)
4) For the earth protection, use a vacuum pump for air purge.
5) R410A refrigerant is azeotropic mixture type refrigerant.
Therefore use liquid type to charge the refrigerant. (If using gas for charging, composition of the
refrigerant changes and then characteristics of the air conditioner change.)
3. Pipe Materials
For the refrigerant pipes, copper pipe and joints are mainly used.
It is necessary to select the most appropriate pipes to conform to the standard.
Use clean material in which impurities adhere inside of pipe or joint to a minimum.
1) Copper pipe
<Piping>
The pipe thickness, flare finishing size, flare nut and others differ according to a refrigerant type.
When using a long copper pipe for R410A, it is recommended to select “Copper or copper-base pipe
without seam” and one with bonded oil amount 40mg/10m or less.
Also do not use crushed, deformed, discolored (especially inside) pipes.
(Impurities cause clogging of expansion valves and capillary tubes.)
<Flare nut>
Use the flare nuts which are attached to the air conditioner unit.
2) Joint
The flare joint and socket joint are used for joints of the copper pipe.
The joints are rarely used for installation of the air conditioner.
However clear impurities when using them.
– 11 –
4. Tools
1. Required Tools for R410A
Mixing of different types of oil may cause a trouble such as generation of sludge, clogging of capillary,
etc. Accordingly, the tools to be used are classified into the following three types.
1) Tools exclusive for R410A (Those which cannot be used for conventional refrigerant (R22))
2) Tools exclusive for R410A, but can be also used for conventional refrigerant (R22)
3) Tools commonly used for R410A and for conventional refrigerant (R22)
The table below shows the tools exclusive for R410A and their interchangeability.
Tools exclusive for R410A (The following tools for R410A are required.)
Tools whose specifications are changed for R410A and their interchangeability
No.
Q
R
S
T
U
V
W
X
Y
Used tool
Flare tool
Copper pipe gauge
for adjusting
projection margin
Torque wrench
Gauge manifold
Charge hose
Vacuum pump adapter
Electronic balance for
refrigerant charging
Refrigerant cylinder
Leakage detector
Usage
Pipe flaring
Flaring by
conventional flare tool
Tightening of flare nut
Evacuating, refrigerant
charge, run check, etc.
Vacuum evacuating
Refrigerant charge
Refrigerant charge
Gas leakage check
air conditioner installation
Existence of
new equipment
for R410A
Ye s ∗ (Note)
Ye s ∗ (Note)
Ye s N o
Ye s N o
Ye s N o
Ye s Ye s
Ye s N o
Ye s N o
R410A
Whether conventional
equipment can be used
Conventional air
conditioner installation
Whether
conventional equipment
can be used
Ye s
∗ (Note)
No
No
Ye s
Ye s
No
Ye s
(Note) When flaring is carried out for R410A using the conventional flare tools, adjustment of projection
margin is necessary. For this adjustment, a copper pipe gauge, etc. are necessary.
General tools (Conventional tools can be used.)
In addition to the above exclusive tools, the following equipments which serve also for R22 are necessary
as the general tools.
1) Vacuum pump. Use vacuum pump by
attaching vacuum pump adapter. 7) Screwdriver (+, –)
2) Torque wrench 8) Spanner or Monkey wrench
3) Pipe cutter 9) Hole core drill
4) Reamer 10) Hexagon wrench (Opposite side 4mm)
5) Pipe bender 11) Tape measure
6) Level vial 12) Metal saw
Also prepare the following equipments for other installation method and run check.
1) Clamp meter 3) Insulation resistance tester (Megger)
2) Thermometer 4) Electroscope
– 12 –
1. SPECIFICATIONS
1-1. Indoor Unit
1-1-1. Concealed Duct High static pressure Type
Model
Cooling capacity (kW)
Heating capacity (kW)
Electrical
characteristics
Appearance Main unit
Outer dimension Main unit Width (mm)
Total weight Main unit (kg)
Heat exchanger
Fan unit Fan Speed
Air filter
Controller (Sold Separately)
Sound pressure level H/M/L (dB•A)
Sound power level H/M/L (dB•A)
Connecting pipe Liquid side (mm)
Indoor unit
Outdoor unit
Power supply (V)
Indoor unit
Cooling
Heating
Maximum
current
Fan
Standard air flow at 137Pa / (at Mid tap) (m³/min)
Motor (W)
External static pressure (H/M/L) (Pa)
Gas side (mm)
Drain port (mm)
Outdoor unit
Total EER
Indoor unit
Outdoor unit
Total COP
Indoor unit (A)
Outdoor unit (A)
Height (mm)
Depth (mm)
Running current (A)
Power consumption (kW)
Power factor (%)
Power supply (V)
Running current (A)
Power consumption (kW)
Power factor (%)
Power consumption (kW)
Energy efficiency class *
Power supply (V)
Running current (A)
Power consumption (kW)
Power factor (%)
Power supply (V)
Running current (A)
Power consumption (kW)
Power factor (%)
Power consumption (kW)
Energy efficiency class ∗
RAV-SM2242DT-E RAV-SM2802DT-E
RAV-SM2242AT8-E RAV-SM2802AT8-E
20.0 23.0
22.4 27.0
1 phase 220-240V~ 50Hz
5.25 – 4.81 5.25 – 4.81
1.12 1.12
97 97
3 phase 380-415V
9.83 – 9.00 12.33 – 11.29
6.08 7.63
94 94
7.20 (3.26 – 9.09) 8.75 (3.36 – 12.76)
2.78 2.63
DD
1 phase 220-240V~ 50Hz
5.25-4.81 5.25-4.81
1.12 1.12
97 97
3 phase 380 – 415V
8.68 – 7.95 11.36 – 10.40
5.37 7.03
94 94
6.49 (2.57 – 7.45) 8.15 (2.57 – 11.01)
3.45 3.31
BC
15.0 15.0
18.0 20.0
Zinc hot dipping steel plate
470 470
1380 1380
1250 1250
160 160
Finned tube
Centrifugal fan Centrifugal fan
3600 4200
11
370 × 3 370 × 3
196 / 137 / 69 196 / 137 / 69
None (Local procure) None (Local procure)
RBC-AMT32E, AMS41E, AS21E2
54 55
74 75
28.6 28.6
12.7 12.7
32 (VP25)
– 13 –
1-1-1. Concealed Duct High static pressure Type (Contined)
Model
Cooling capacity (kW)
Heating capacity (kW)
Electrical
characteristics
Appearance Main unit
Outer dimension Main unit Width (mm)
Total weight Main unit (kg)
Heat exchanger
Fan unit Fan Speed
Air filter
Controller (Sold Separately)
Sound pressure level H/M/L (dB•A)
Sound power level H/M/L (dB•A)
Connecting pipe Liquid side (mm)
Indoor unit
Outdoor unit
Power supply (V)
Indoor unit
Cooling
Heating
Maximum
current
Fan
Standard air flow at 137Pa / (at Mid tap) (m³/min)
Motor (W)
External static pressure (H/M/L) (Pa)
Gas side (mm)
Drain port (mm)
Outdoor unit
Total EER
Indoor unit
Outdoor unit
Total COP
Indoor unit (A)
Outdoor unit (A)
Height (mm)
Depth (mm)
Running current (A)
Power consumption (kW)
Power factor (%)
Power supply (V)
Running current (A)
Power consumption (kW)
Power factor (%)
Power consumption (kW)
Energy efficiency class *
Power supply (V)
Running current (A)
Power consumption (kW)
Power factor (%)
Power supply (V)
Running current (A)
Power consumption (kW)
Power factor (%)
Power consumption (kW)
Energy efficiency class ∗
RAV-SM2242DT-TR RAV-SM2802DT-TR
RAV-SM2244AT8-E RAV-SM2804AT8-E
20.0 23.0
22.4 27.0
1 phase 220-240V~ 50Hz
5.25 – 4.81 5.25 – 4.81
1.12 1.12
97 97
3 phase 380-415V
9.83 – 9.00 12.33 – 11.29
6.08 7.63
94 94
7.20 (3.26 – 9.09) 8.75 (3.36 – 12.76)
2.78 2.63
DD
1 phase 220-240V~ 50Hz
5.25 – 4.81 5.25 – 4.81
1.12 1.12
97 97
3 phase 380-415V
8.68 – 7.95 11.36 – 10.40
5.37 7.03
94 94
6.49 (2.57 – 7.45) 8.15 (2.57 – 11.01)
3.45 3.31
BC
15.0 15.0
18.0 20.0
Zinc hot dipping steel plate
470 470
1380 1380
1250 1250
160 160
Finned tube
Centrifugal fan Centrifugal fan
3600 4200
11
370 × 3 370 × 3
196 / 137 / 69 196 / 137 / 69
None (Local procure) None (Local procure)
RBC-AMT32E, AMS41E, AS21E2
54 55
74 75
28.6 28.6
12.7 12.7
32 (VP25)
– 14 –
2. CONSTRUCTION VIEWS (EXTERNAL VIEWS)
r
2-1. Indoor Unit
RAV-SM2242DT-E, RAV-SM2802DT-E / RAV-SM2242DT-TR, RAV-SM2802DT-TR
.
l
Attention
set a drain trap on its way as shown below figure.
1. Be sure to set a check port at the right of air discharge port.
2. Set to slope the drain piping downward at 1/100 and be sure to
<Installation Notice>
maintained easily such as a suction grills.
(If there is no air filter, dusts are blocked in the air heat exchange
So be sure to set an air filter(local arrangements) in the position
is shrouded by oil smoke, such as kitchen or mechanical factory.
3. Please avoid the installation on the place where oil disperses or
4. Indoor unit do es not have air filter its inside.
and it may cause failure or water leak in air-conditioner.)
5. Please hang the main unit horizontally.
0100
Check pane
because g arbage in dr ain piping piles up ea sily in dr ain trap
Be sure t o set the pl ug and to make it to be able to cleaning,
138
(Hanging bolt mounting pitch)
or more
100
1260
or mor
e
50
250
Air suction port
Plug
(Check and cleaning port)
Screw hole for duct mounting(10-M6)
3540629
5
4
Electric parts box
)
Power supply/communication piping port( 26)
(Under electric parts box
250250250
190
t
47
0
(Unit:mm)
Refrigerant pipe connecting por
(Liquid side 12.7 Flared)
*
8
132
0
125
4
8
62
69
1
3
,
(Hanging bolt mounting pitch)
8
150200
128
Drain pipe connecting port(V25)
Taper screw for R1,25.4 pipes
65
6
(Gas side Brazed)
Refrigerant pipe connecting port
*
(4-12 × 92)
Hole for hanging bolt
190
0
4
2
2
25
28.6
Gas side
Diameter of
connecting pipe
12.7
Liquid side
e
22.2
Gas sid
7
12.
Diameter of
pipe connecting port
Liquid side
and therefore please use the accessory joint for installation.
The diameter of connecting gas side on the indoor unit is 22.2
*
0
25
Service space
or more
200
Service space
1000 or more
200
250
250
Air discharge port
Screw hole for duct mounting(10-M6)
0
60
Space required for installation and serving
Check port
35
37065
– 15 –
3. SYSTEMATIC REFRIGERATING CYCLE DIAGRAM
3-1. Indoor Unit
RAV-SM2242DT-E, RAV-SM2802DT-E
RAV-SM2242DT-TR, RAV-SM2802DT-TR
Dimension table
Indoor unit
SM224, SM280 type
Distributor
(Strainer
incorporated)
TC sensor
Refrigerant pipe
at liquid side ØB
Outer diameter of refrigerant pipe
Gas side ØA Liquid side ØB
28.6 12.7
Indoor unit
TCJ sensor
Air heat
exchanger
Heating
Cooling
Refrigerant pipe
at gas side ØA
To outdoor unitTo outdoor unit
– 16 –
4. WIRING DIAGRAM
4-1. Indoor Unit
RAV-SM2242DT-E, RAV-SM2802DT-E
RAV-SM2242DT-TR, RAV-SM2802DT-TR
FILTER
EXCT
PNL
2
1
3
CN080
(GRN)
TC
1221
(BLK)
CN101
J
2
2
TC
1
1
(RED)
CN102
TA
1221
(YEL)
CN104
3
3
21
FS
(RED)
CN030
1
LM
CN033
(GRN)
3
1
DP
(BLU)
CN068
(Option)
3
DP
1
1
LUL
397
5 1 3
HM
7
9
RY007
FAN
CN083(WHI)
RED
6
RED
spark killer
8
7
43F2
RED
spark killer
8
7
43F1
2
1
2
1
(WHI)
CN070
(RED)
CN073
OPTION
CN060(WHI)
FAN
3
MCC-140
t
for Indoor Unit
circui
supply
Power
Control P.C. Board
RY001
DRIVE
(WHI)
CN032
456 121 532 4 6
3
CN061(YEL)
CN02
CN075
(WHI)
6 1 2
5
56
4
41
3
3
2
21
1
3
3
1
1
CN074(WHI)
54321
32 41 5
RY002
RY005
RY006
RY004
CN304(GRY)
1
3
WHIWHI
WHI
CN309
(YEL)
111
3
7
T5.0A 250V
Fuse
33
WHI
RED ACIN
3
3
2
1
RC
CN067(BLK)
CN066(WHI) CN041(BLU) CN050(WHI)
55
1
2
BLK
321
K
#250
FASTON
N
RED WHI BL
#250
FASTO
Earth
Screw
Indoor Unit
4
ORN
F1 F2 F3 F
ORN
RC
43F1
6
4
)
CN01
(WHI)
(YEL
6531 2 4
421 3 5 6
5
432
1
CN051
(RED)
d
MCC-1520
Sub P.C.Boar
5
421
3
BLK BLK
6
6531 2 4
42135
21
r
Adapte
TCC-LINK
CN040
B
A
U3 U4
(Option)
TR
ORN
RC
43F2
6
4
r
1 2
(Option)
(BLU)
TCC-LINK Adapte
RED
RED
ORN
RC
A B
Remote
Controller
NL3L2L1
RED
T10A,250V
T10A,250V
T10A,250V
F3
F1
F2
RED
RED
RED
z
5
43F2
3
5
43F1
5
3
N
RED
#187
FASTO
I
WH
RED
231
Power Supply
380-415V 3N 50H
w
Earth
Scre
Outdoor Unit
Note
YEL BLU
FM1
4P
FAN1
(WHI)
4
4
GRY
31 2
21 3
REDGRY
RED
WHI
WHI
ORN
BLU
F1 F2 F3 F4
YEL
FM2
4P
FAN2
(BLU)
4
4
GRY
32
RED
1
1 23
WHI REDGRY
WHI
ORN
BLU
F1 F2 F3 F4
YEL
A
FM3
4P
FAN3
(RED)
4
4
GRY
GRY
321
3
21
RED
RED
WHI
WHI
)
(WHI
CN100
73 5
3 75
MCC-1263
1
1
WHI
RED
S(N)R(L)
Indoor Fan
Power Supply
w
Earth
Scre
Indoor Unit
220-240V 50Hz
Letter at inside indicates the terminal number.
4.When installing the drain pump connect
2.A dotted line and broken line indicate the wiring at site.
3. indicates the control P.C board.
1. indicates the terminal block.
.
the froat switch connector to CN030 connector.
exchange the lead wire of arrow( ) position after check the terminal
number as figure and lead wire's color of fan motor
5. A position is connected to terminal block when change to static pressure.
Setting from factory
e
69 (7)
137 (14)
YEL
1
F
BLU
2
F3F
196 (20)
Parts nam
Fan Motor Control Relay
Fuse fo r Fan MotorDPDrain Pump Motor
Louver Control Relay
Drain Control Relay
Fan Motor Control Relay
Temp sensor
Indoor temp sensor
TransformerRCRunning Capacitor
ORN
Fan Motor
TA
TR
FM1 3
Symbol
TC,TCJ
RY005 007
F1 3
RY001
RY002
43F1,43F2
BLU
YEL
ORN
49F
wiring diagram
Fan motor inside
WHI
BLK
protection switch
Motor over heating
RED
GRY
N
N
COLOR
YEL:YELLOW
WHI:WHITE
RED:RED
IDENTIFICATIO
GRY:GRAY
ORN:ORANGE
BLU:BLUE
BLK:BLACK
GRN:GREEN
PNK:PINK
BRW:BROW
Pa (mmAg)
Static pressure
wiring
Fan motor
No.
Terminal
– 17 –
4-2. Fan Characteristics
Current value as a criterion, adjust the air volume value to become within the range of the chart below.]
< RAV-SM2242 type >
8
7.5
7
6.5
6
5.5
Current of fan motor (A)
5
4.5
4
300
250
200
150
100
50
External static pressure (Pa)
5
2880 3200 3600 4000
Lower limit of air volume
Standard air volume: 3600m³/h
30002800 3400 3800 4200 4400
4320
Air volume (m³/h)
Upper limit of air volume
High static pressure tap (50Hz)
Medium static pressure tap (50Hz)
Low static pressure tap (50Hz)
High static pressure tap (50Hz)
Medium static pressure tap (50Hz)
Low static pressure tap (50Hz)
– 18 –
< RAV-SM2802 type >
Current of fan motor (A)
8.5
7.5
6.5
5.5
4.5
350
300
250
200
150
Standard air volume: 4200m³/h
8
7
High static pressure tap (50Hz)
6
Medium static pressure tap (50Hz)
Low static pressure tap (50Hz)
5
4
100
External static pressure (Pa)
50
5
34003200 3800 4200 4600 5000 5200
3360 3600 4000 4400 4800
Lower limit of air volume Upper limit of air volume
Air volume (m³/h)
5040
High static pressure tap (50Hz)
Medium static pressure tap (50Hz)
Low static pressure tap (50Hz)
REQUIREMENT
Add a air volume damper to the air supply duct, and adjust the air volume in the range from 80% to 120% of
the standard air volume.
– 19 –
n Wire connection change of fan motor
This duct is composed of 3 fan motors.
To change external static pressure by duct resistance, connect the 3 connectors of the orange lead wires
that are connected to the underside of the fan tap changing terminal block to the same number
(F1, F2 or F3) terminal.
The wires of the fan motor has been connected to (F2) [External static pressure 137Pa (14mmAq)] as
factory default.
Low static pressure (F1)
FM
FM
Fan motor Fan motor Fan motor
BLU
ORG
YEL
F1F2F3F
ORG
4
FAN3
BLU
YEL
F1F2F3F
ORG
FAN2
Standard (Middle) static pressure (F2)
FM
Fan motor Fan motor Fan motor
BLU
YEL
F1F2F3F
ORG
ORG
4
FAN3
FM
BLU
YEL
F1F2F3F
ORG
FAN2
High static pressure (F3)
FM
Fan motor Fan motor
BLU
YEL
ORG
FM
YEL
BLU
ORG
ORG
4
ORG
4
FM
FM
FM
Fan motor
BLU
YEL
F1F2F3F
ORG
BLU
YEL
F1F2F3F
ORG
BLU
YEL
ORG
4
FAN1
Fan tap changing
terminal block
ORG
4
FAN1
ORG
YEL: Yellow
BLU: Blue
ORG: Orange
Electrical control box
Control
P.C. board
2P terminal
block
4P terminal
block
3P terminal
block
F1F2F3F
Terminal block No.
F1
F2
F3
ORG
4
FAN3
F1F2F3F
Fan motor wiring
Yellow
Low static pressure
Blue
Middle static pressure
Orange
High static pressure
ORG
4
FAN2
F1F2F3F
4
FAN1
ORG
External static pressure
Pa (mmAq)
69 (7)
137 (14)
196 (20)
Remarks
Factory default
∗ Do not use F4.
NOTE
When the external static pressure is changed, write down the static pressure once change in the wiring
diagram of the indoor unit is made.
– 20 –
5. SPECIFICATIONS OF ELECTRICAL PARTS
5-1. Indoor Unit
RAV-SM2242DT-E, RAV-SM2802DT-E
RAV-SM2242DT-TR, RAV-SM2802DT-TR
No.
1
2
3
4
Parts name
Fan motor
TA sensor
TC sensor
TCJ sensor
Type
STF-200-370-4AR
Lead wire length : 818mm
Ø6 size lead wire length : 2000mm Vinyl tube (Black)
Ø6 size lead wire length : 2000mm Vinyl tube (Red)
Specifications
Output (Rated) 370 W
10 kΩ at 25°C
10 kΩ at 25°C
10 kΩ at 25°C
– 21 –
6. INDOOR CONTROL CIRCUIT
6-1. Indoor Controller Block Diagram
RAV-SM2242DT-E, RAV-SM2802DT-E / RAV-SM2242DT-TR, RAV-SM2802DT-TR
6-1-1. Connection of Wired (Simple) Remote Controller
Indoor unit
#1 (Header)
Network adapter (Option)
Network adapter
P.C. board
(MCC-1401)
X
Y
AI net
communication
circuit
Remote controller
DC5V
Power supply
circuit
Transformer
communication
circuit
CPU
H8/3687
Switch
set
Wired (Simple) Master remote controller
Display part
Display part
Indoor control
P.C. board
(MCC-1403)
DC20V
Power supply
circuit
(Max. 2 units)
LCD
LED
Remote controller
communication
circuit
Remote controller
communication
circuit
DC5V
DC12V
BA
CPU
DC5V
Power supply
Driver
Function
setup
Key switch
circuit
CPU
H8/3039
CN2
CN1
*3
Display part
LCD
Power supply
circuit
EEPROM
TA sensor
TC sensor
TCJ sensor
Float input
Schedule timer
Driver
LCD
CPU
Secondary
DC5V
#2
(Follower)#3(Follower)
BA
A
Same as
left ∗2
Function
setup
Key switch
battery
Same as
left ∗2
B
Central control
remote controller
(Option)
Drain
pump
(Sold separately)
Indoor
fan motor
Transformer
Fan motor
relay circuit
Outside
output
START
ALARM
READY
THERMO ON
COOL
HEAT
FAN
AC synchronous
signal input circuit
123
123
Outdoor unit
Serial send/
receive circuit
123
Outdoor
unit
Max. 8 units are connectable. ∗1
∗1 However when mounting a network adapter while 2 wired (simple) remote controllers are connected,
Max. 7 units are connectable.
∗2 A network adapter is mounted to only 1 unit.
∗3 Connection of schedule timer to the simple remote controller is unavailable.
123
Outdoor
unit
– 22 –
6-2. Control Specifications
No.
1
When power
supply is reset
2
Operation
mode selection
Item
Outline of specifications
1) Distinction of outdoor unit
When the power supply is reset, the outdoors are distinguished
and the control is selected according to the distinguished result.
1) Based on the operation mode selecting command from the
remote controller, the operation mode is selected.
Remote controller
command
STOP
FAN
COOL
HEAT
AUTO
Air conditioner stops.
Fan operation
Cooling operation
Heating operation
• COOL/HEAT operation mode is
automatically selected by Ta, Ts and
To for operation.
• The operation is performed as shown
in the following figure according to Ta
value at the first time only.
(In the range of Ts +
+ 1, Setup air volume operation
continues.)
Control outline
α –1 < Ta < Ts + α
Remarks
Ta: Room temp.
Ts: Setup temp.
To: Outside temp.
Cooling
+1.0
Ta
Ts +
(˚C)
•
α is corrected according to the outside temperature.
Outside temp.
24 > To ≥ 18°C
α
-1.0
No To
To ≥ 24°C
To < 18°C
To error
operation
Setup air volume operation
• Setup air volume
Heating
operation
Correction value (a)
0K
–1K
0K
+1K
0K
K = deg
– 23 –
No.
3
Item
Room temp.
control
Outline of specifications
1) Adjustment range: Remote controller setup temperature (°C)
Wired type
COOL
18 to 29
HEAT
18 to 29
AUTO
18 to 29
Remarks
4
Automatic
capacity control
(GA control)
2) Using the Item code 06, the setup temperature in heating
operation can be corrected.
Setup data
Setup temp. correction
0246
+0°C +2°C +4°C +6°C
Setup air volume operation
Indoor formation
1-way Air Discharge Cassette Type
2-way Air Discharge Cassette Type
Concealed Duct Standard Type
High Wall Type
Under Ceiling Type
Floor Standing Concealed Type
Floor Standing Type
Setup data
2
0
1) Based on the difference between Ta and Ts, the operation
frequency is instructed to the outdoor unit.
2) Cooling operation
Every 90 seconds, the room temperature difference
between temperature detected by Ta and Ts and the varied
room temperature value are calculated to obtain the
correction value of the frequency command and then the
present frequency command is corrected.
Ta (n) – Ts (n) : Room temp. difference
n : Counts of detection
Ta (n-1) – Ts (n) : Varied room temp. value
n – 1 :
Counts of detection of 90 seconds before
3) Heating operation
Every 1 minute (60 sec.), the room temperature
difference between temperature detected by Ta and Ts
and the varied room temperature value are calculated to
obtain the correction value of the frequency command
and then the present frequency command is corrected.
Ts (n) – Ta (n) : Room temp. difference
n : Counts of detection
Ta (n) – Ta (n – 1) : Varied room temp. value
n – 1 : Counts of detection of 1 minute before
Shift of suction
temperature in heating
operation
NOTE)
In case that Low volume is set, the maximum frequency is
restricted to approx. [SB].
– 24 –
No.
5
Automatic cooling/
heating control
Item
Outline of specifications
1) The judgment of selecting COOL/HEAT is carried out
as shown below. When exceeding +1.5 against Tsh
10 minutes and after thermo.-OFF, heating operation
(Thermo. OFF) exchanges to cooling operation.
Description in the parentheses shows an example of
cooling ON/OFF.
Remarks
Tsc: Setup temp. in
cooling operation
Tsh: Setup temp. in
heating operation
+ temp. correction of
room temp. control
6
Cool air discharge
preventive control
Ta (˚C)
Cooling
+1.5
or
Tsc
Tsh
(Cooling OFF)
(Cooling ON)
-1.5
Heating
WWhen –1.5 or more lowers against Tsc 10 minutes
and after thermo. OFF, cooling operation
(Thermo. OFF) exchanges to heating operation.
2) For the automatic capacity control after judgment of
cooling/heating, see Item 4.
3) For temperature correction of room temp. control in
automatic heating, see Item 3.
1) In heating operation, the indoor fan is controlled
based on the detected temperature of Tc sensor or Tcj
sensor. As shown below, the upper limit of the
revolution frequency is restricted.
However B zone is assumed as C zone for 6 minutes
and after when the compressor activated.
In defrost operation, the control value of Tc or Tcj are
shifted by 6°C.
In A zone, [PRE-HEAT
(Heating ready)] is
displayed.
Tc
Tcj
(˚C)
26
16
HH
B zone
OFF
A zone
– 25 –
No.
7
Freeze preventive control
(Low temperature release)
Item
Outline of specifications
1) The cooling operation is performed as follows
based on the detected temperature of Tc sensor or
Tcj sensor.
When [J] zone is detected for 6 minutes
(Following figure), the commanded frequency is
decreased from the real operation frequency.
After then the commanded frequency changes
every 30 seconds while operation is performed in
[J] zone.
In [K] zone, time counting is interrupted and the
operation is held.
When [ I ] zone is detected, the timer is cleared
and the operation returns to the normal operation.
If the commanded frequency becomes S0
because the operation continues in [J] zone, the
return temperature A is raised from 5°C to 12°C
until [ I ] zone is detected and the indoor fan
operates with [Fan] mode.
(˚C)
5
I
A
K
Remarks
Tc, Tcj:
Indoor heat exchanger
sensor temperature
2
J
In heating operation, the freeze-preventive control
works if 4-way valve is not exchanged and the
following conditions are satisfied.
(However the temperature for J zone dashing
control is changed from 2°C to –5°C.)
<Conditions>
• When Q or R is established 5 minutes after
activation.
Tcn ≤ Tc (n – 1) – 5
Q
Tcn < Tc (n – 1) – 1 and Tcn ≤ Ta < 5°C
R
Tcn:
Tc temperature when
5 minutes elapsed after
activation
Tc (n – 1):
Tc temperature at start
time
– 26 –
No.
8
High-temp. release
control
Item
Outline of specifications
1) The heating operation is performed as follows based
on the detected temperature of Tc sensor or Tcj sensor.
• When [M] zone is detected, the commanded frequency
is decreased from the real operation frequency.
After then the commanded frequency changes every
30 seconds while operation is performed in [M] zone.
• In [N] zone, the commanded frequency is held.
• When [L] zone is detected, the commanded fre-
quency is returned to the original value by approx.
6Hz every 60 seconds.
Remarks
9
Drain pump control
(
When drain up kit
sold separately is
mounted
Setup at shipment
Control temp. (°C)
AB
56 (54) 52 (52)
Tc
Tcj
(˚C)
A
B
M
N
L
NOTE:
When the operation has started or when Tc or Tcj < 30°C
at start of the operation or after operation start,
Same status as that
when “thermostat-OFF”
temperature is controlled between values in parentheses
of A and B.
1) In cooling operation, the drain pump is usually
operated.
2) If the float switch works while drain pump drives, the
)
compressor stops, the drain pump continues the
Check code [P10]
operation, and a check code is output.
3) If the float switch works while drain pump stops, the
compressor stops and the drain pump operates. If the
float switch keeps operating for approx. 4 minutes, a
check code is output.
10
After-heat
elimination
11 Use for remote start/stop
HA control 1) ON/OFF is possible by HA signal input from the
When heating operation stops, in some cases, the indoor
fan operates with [FAN] for approx. 30 seconds.
remote site when it is connected to the wireless
remote unit or the remote Start/Stop I/F.
2) ON/OFF status is output to HA output terminal.
3) HA I/O specification conforms to JEMA Standard.
When using HA terminal
(CN61), the connecting
connector sold sepa-
rately is necessary.
In a group operation,
connect it to any of
master or follower indoor
unit for use.
– 27 –
No.
12
Frequency fixed
operation
(Test run)
Item
Outline of specifications
<In case of wired remote controller>
1) When pushing [CHK] button for 4 seconds or more,
[TEST] is displayed on the display screen and the
mode enters in Test run mode.
2) Push [ON/OFF] button.
3) Using [MODE] button, set the mode to [COOL] or
[HEAT].
• Do not use other mode than [COOL]/[HEAT]
mode.
• During test run operation, the temperature cannot
be adjusted.
• An error is detected as usual.
• A frequency fixed operation is performed.
After the test run, push [ON/OFF] button to stop the
4)
operation.
procedure in Item 1.)
5) Push [CHK] button to clear the test run mode.
([TEST] display in the display part disappears and
the status returns to the normal stop status.)
(Display in the display part is same as the
Remarks
Approx. command
frequency [S7]
13 Filter sign display
14 Central control mode
selection
1) The operation time of the indoor fan is calculated,
the filter reset signal is sent to the remote controller
when the specified time has passed, and it is
displayed on LCD.
2) When the filter reset signal has been received from
the remote controller, time of the calculation timer
is cleared.
In this case, the measurement time is reset if the
specified time has passed, and display on LCD
disappears.
1) Setting at the centerl controller side enables to
select the contents which can be operated on the
remote controller at indoor unit side.
2) Setup contents
• 64 line central controller (TCB-SC642TLE2)
[Individual]: Operated on the remote controller
(Priority to second pushing)
[Central 1]: ON/OFF operation cannot be
operated on the remote controller.
[Central 2]: ON/OFF, mode selection, temp. setup
operations cannot be operated on
the remote controller.
[Central 3]: Mode selection and temp. setup
operations
remote controller.
[Central 4]: Mode selection cannot be operated
on the remote controller.
∗ In case of the wireless type, the display lamp
does not change but the contents are same.
If operating an item which is prohibited by the
central control mode from the remote controller, it
is notified with the receive sound, Pi, Pi, Pi, Pi, Pi
(5 times).
cannot be operated on the
[FILTER ] goes on.
Specified time
Duct: 2500H
Display at remote
controller side
(No display)
[Central
[Central
[Central
[Central
“Fixed with 75%”.)
] goes on
] goes on
] goes on
] goes on
– 28 –
No.
15
Save operation
(By connected
outdoor unit)
16
Max. frequency
cut control
Item
Outline of specifications
1) When selecting [AUTO] mode, the save operation is enabled.
2) Shift (Correct) the setup temperature from input values of the
every sensor in the range of not spoiling comfortable ability.
3) The input values mean the room temperature Ta, outside
temperature To, air volume, and indoor heat exchanger sensor
temperature Tc. Their data for 20 minutes are averaged to
calculate the correction value of the setup temperature.
4) The setup temperature is shifted every 20 minutes, and the
shift value is
In cooling time: +1.5 to ~1.0K
In heating time: –1.5 to +1.0K.
1) When selecting [AUTO] mode, the Max. frequency cut control
operation is enabled.
2) Cooling operation mode: In case of To <28°C, Max. frequency
cut is controlled based on the following figure.
Ta (˚C)
+4
Usual control
Remarks
+3
The Max. frequency is restricted
to approx. cooling rated value.
Tsc
3) Heating operation mode: In case of To > 15°C, Max. frequency
cut is controlled based on the following figure.
Ta (˚C)
Tsh
–3
The Max. frequency is restricted
to approx. cooling rated value.
–4
Usual control
– 29 –
6-3. Indoor Print Circuit Board
<MCC-1403>
EEPROM
Microcomputer
operation LED
Remote controller
power supply LED
Optional output
Remote controller
inter-unit wire
Used for servicing
CHK
DISP
TC sensor
Outside
error input
TA sensor
∗1 No function
TCJ sensor
Float SW
∗ Short plug is inserted
Power transformer (Secondary side)
(AC11V, 14V, 20V)
Power supply
Power transformer
(Primary side)
(AC240V)
Drain pump
output
Optional
power supply
EXCT
Filter/Option error input
AC fan output
– 30 –
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