Toshiba RAS-M16SKV-E, RAS-M10SKCV-E, RAS-M07SKV-E, RAS-M10SKV-E, RAS-M16SKCV-E SERVICE MANUAL
...
SERVICE MANUAL
Indoor Unit
<High Wall, Heat Pump Type>
FILE NO. SVM-07034-2
SPLIT TYPE
RAS-M07SKV-E
RAS-M10SKV-E
RAS-M13SKV-E
RAS-M16SKV-E
<High Wall, Cooling Type>
RAS-M10SKCV-E
RAS-M13SKCV-E
RAS-M16SKCV-E
R410A
Revised May, 2009
CONTENTS
1. SAFETY PRECAUTIONS .......................................................................... 3
2. SPECIFICATIONS ..................................................................................... 5
3. REFRIGERANT R410A ............................................................................. 8
4. CONSTRUCTION VIEWS ........................................................................ 16
5. WIRING DIAGRAM .................................................................................. 17
6. SPECIFICATIONS OF ELECTRICAL PARTS ......................................... 19
7. REFRIGERANT CYCLE DIAGRAM ........................................................ 20
8. CONTROL BLOCK DIAGRAM ................................................................ 21
9. OPERATION DESCRIPTION................................................................... 23
10. INSTALLATION PROCEDURE ................................................................ 47
11. HOW TO DIAGNOSE THE TROUBLE...................................................... 55
12. HOW TO REPLACE THE MAIN PARTS................................................... 74
13. EXPLODED VIEWS AND PARTS LIST ................................................... 83
– 2 –
1. SAFETY PRECAUTIONS
For general public use
Power supply cord of outdoor unit shall be more than 1.5 mm2 (H07RN-F or 60245IEC66) polychloroprene
sheathed flexible cord.
• Read this “SAFETY PRECAUTIONS” carefully bef ore servicing.
• The precautions described below include the important items regarding safety. Observe them without fail.
• After the servicing work, perform a trial operation to check for any problem.
• Turn off the main power supply switch (or breaker) before the unit maintenance.
CAUTION
New Refrigerant Air Conditioner Installation
• THIS AIR CONDITIONER ADOPTS THE NEW HFC REFRIGERANT (R410A) WHICH DOES NOT
DESTROY OZONE LAYER.
R410A refrigerant is apt to be affected by impurities such as water, oxidizing membrane, and oils because
the working pressure of R410A refrigerant is approx. 1.6 times of refrigerant R22. Accompanied with the
adoption of the new refrigerant, the refrigeration machine oil has also been changed. Therefore, during
installation work, be sure that water , dust, former refrigerant, or refrigeration machine oil does not enter into
the new type refrigerant R410A air conditioner circuit.
To prevent mixing of refrigerant or refrigerating machine oil, the sizes of connecting sections of charging
port on main unit and installation tools are different from those used for the conventional refrigerant units.
Accordingly, special tools are required for the new refrigerant (R410A) units. For connecting pipes, use new
and clean piping materials with high pressure fittings made for R410A only, so that water and/or dust does
not enter. Moreover, do not use the existing piping because there are some problems with pressure fittings
and possible impurities in existing piping.
CAUTION
TO DISCONNECT THE APPLIANCE FROM THE MAIN POWER SUPPLY
This appliance must be connected to the main power supply by a circuit breaker or a switch with a contact
separation of at least 3 mm.
DANGER
• ASK AN AUTHORIZED DEALER OR QUALIFIED INSTALLATION PROFESSIONAL TO INSTALL/MAINTAIN THE AIR CONDITIONER.
INAPPROPRIATE SERVICING MAY RESULT IN WATER LEAKAGE, ELECTRIC SHOCK OR FIRE.
• TURN OFF MAIN POWER SUPPLY BEFORE ATTEMPTING ANY ELECTRICAL W ORK. MAKE SURE
ALL POWER SWITCHES ARE OFF. FAILURE TO DO SO MAY CAUSE ELECTRIC SHOCK.
DANGER: HIGH VOLTAGE
The high voltage circuit is incorporated.
Be careful to do the check service, as the electric shock may be caused in case of touching parts
on the P.C. board by hand.
• CORRECTLY CONNECT THE CONNECTING CABLE. IF THE CONNECTING CABLE IS INCORRECTLY CONNECTED , ELECTRIC PARTS MAY BE DAMAGED.
• CHECK THAT THE EARTH WIRE IS NOT BROKEN OR DISCONNECTED BEFORE SERVICE AND
INSTALLATION. FAILURE TO DO SO MAY CAUSE ELECTRIC SHOCK.
– 3 –
• DO NOT INSTALL NEAR CONCENTRATIONS OF COMBUSTIBLE GAS OR GAS VAPORS. FAILURE
TO FOLLOW THIS INSTRUCTION CAN RESULT IN FIRE OR EXPLOSION.
• TO PREVENT THE INDOOR UNIT FROM OVERHEATING AND CAUSING A FIRE HAZARD, PLACE
THE UNIT WELL AWAY (MORE THAN 2 M) FROM HEAT SOURCES SUCH AS RADIATORS, HEAT
REGISTORS, FURNACE, STOVES, ETC.
• WHEN MOVING THE AIR-CONDITIONER FOR INSTALLATION IN ANOTHER PLACE, BE VERY CAREFUL NOT TO ALLOW THE SPECIFIED REFRIGERANT (R410A) TO BECOME MIXED WITH ANY
OTHER GASEOUS BODY INTO THE REFRIGERATION CIRCUIT. IF AIR OR ANY OTHER GAS IS
MIXED IN THE REFRIGERANT, THE GAS PRESSURE IN THE REFRIGERATION CIRCUIT WILL
BECOME ABNORMALLY HIGH AND IT MAY RESUL T IN THE PIPE BURSTING AND POSSIBLE PERSONNEL INJURIES.
• IN THE EVENT THAT THE REFRIGERANT GAS LEAKS OUT OF THE PIPE DURING THE SERVICE
WORK AND THE INSTALLATION WORK, IMMEDIATELY LET FRESH AIR INTO THE ROOM. IF THE
REFRIGERANT GAS IS HEATED, SUCH AS BY FIRE, GENERATION OF POISONOUS GAS MA Y
RESULT.
WARNING
• Never modify this unit by removing any of the safety guards or bypass any of the safety interlock
switches.
• Do not install in a place which cannot bear the weight of the unit. Personal injury and property
damage can result if the unit falls.
• After the installation work, confirm that refrigerant gas does not leak.
If refrigerant gas leaks into the room and flows near a fire source, such as a cooking range, noxious gas
may generate.
• The electrical work must be performed by a qualified electrician in accordance with the Installation
Manual. Make sure the air conditioner uses an exclusive circuit.
An insufficient circuit capacity or inappropriate installation may cause fire.
• When wiring, use the specified cables and connect the terminals securely to prevent external
forces applied to the cable from affecting the terminals.
• Be sure to provide grounding.
Do not connect ground wires to gas pipes, water pipes, lightning rods or ground wires for telephone cables.
• Conform to the regulations of the local electric company when wiring the power supply.
Inappropriate grounding may cause electric shock.
CAUTION
• Exposure of unit to water or other moisture before installation may result in an electrical short.
Do not store in a wet basement or expose to rain or water.
• Do not install in a place that can increase the vibration of the unit. Do not install in a place that can amplify
the noise level of the unit or where noise or discharged air might disturb neighbors.
• To avoid personal injury, be careful when handling parts with sharp edges.
• Perform the specified installation work to guard against an earthquake.
If the air conditioner is not installed appropriately, accidents may occur due to the falling unit.
For Reference:
If a heating operation would be continuously perf ormed for a long time under the condition that the outdoor
temperature is 0°C or lower, drainage of defrosted water may be difficult due to freezing of the bottom plate,
resulting in a trouble of the cabinet or fan.
It is recommended to procure an antifreeze heater locally for a safe installation of the air conditioner .
For details, contact the dealer.
– 4 –
2. Specifications
2-1. Combined Outdoor Unit
The outdoor units, which can be combined with M**SKV-E series indoor unit are as described below:
2-2-1. Heatpump type
Revised-2
Outdoor
unit type M16SKV-E M13SKV-E M10SKV-E M07SKV-E
2-room Multi X X
outdoor unit X
3-room Multi X
outdoor unit
4-room Multi X
outdoor unit
2-2-2. Cooling only type
Outdoor
unit type M16SKCV-E M13SKCV-E M10SKCV-E
2-room Multi X
outdoor unit
3-room Multi
outdoor unit
4-room Multi
outdoor unit
Combined outdoor unit
model name
RAS-M14GAV-E
RAS-M18GAV-E
RAS-3M18SAV-E
RAS-3M26GAV-E1
RAS-4M23SAV-E
RAS-4M27GAV-E1
: Combination available
X : Combination unavailable
Combined outdoor unit Indoor unit model name
model name
RAS-M14GACV-E
RAS-M18GACV-E
RAS-3M18SACV-E
RAS-3M23GACV-E
RAS-4M23SACV-E
RAS-4M27GACV-E
: Combination available
X : Combination unavailable
Indoor unit model name
This service manual describes about M**SKV-E series indoor units, RAS-M07SKV-E,RAS-M10SKV-E,
RAS-M13SKV-E,RAS-M16SKV-E,RAS-M10SKCV-E,RAS-M13SKCV-E and RAS-M16SKCV-E only.
For the multi outdoor unit to be combined, refer to the service manual.
Outdoor unit
RAS-M14GAV-E RAS-M14GACV-E
RAS-M18GAV-E
RAS-3M18SAV-E
RAS-4M23SAV-E
RAS-3M26GAV-E,RAS-4M27GAV-E
Cooling only modelHeat Pump Model
RAS-M18GACV-E
RAS-3M18SACV-E
RAS-3M23GACV-E
RAS-4M23SACV-E
RAS-4M27GACV-E
File name
A05-009-1
A06-013
A05-014-1
A06-014
A05-011-1
– 5 –
Specifications
r
g
t
(A)
(W)
r
(%)
g
t
(A)
∗1∗1∗1∗
∗1∗
p
(W)
∗1∗1∗1∗
∗1∗
r
(%)
∗1∗1∗1∗
∗1∗
g
(A)
∗1∗1∗1∗
∗1∗
(
g)
∗1∗1∗1∗
∗1∗
p
g
r
(
g/
(A)
w
t
ght
(mm)
p
ght
(kg)
(W)
)
(
g)
ping
g
r
p
r
r
p
∅
∅
∅
∅
E
∅
∅
∅
∅
Revised-2
Unit model Indoor
Cooling capacity (kW)
Cooling capacity range (kW)
Heating capacity (kW)
Heating capacity range (kW)
Power supply
Electric Indoo
characteristic Runnin
COP
Cooling/Heatin
eratin
O
noise
dB
Indoor uni
Outdoor unit Dimension Height
Pi
connection
Wiring connection Power supply
Usable temperature ran
Accessory Indoor unit Installation plate
Outdoor
Unit model
Power consumption
Outdoor Operation mode Cooling Heating Cooling Heating Cooling Heating Cooling Heating
Indoo
Coolin
Heating)Medium 40/40
Outdoor Cooling
Unit model
Dimension Hei
Net wei
Fan motor output
Air flow rate(m3/h
(mm) Width
Net weight (kg)
Compressor Motor output (W)
Fan motor output (W)
Air flow rate (m3/h) (Cooling/Heating)
Type
Indoor unitUnit model
Outdoor unit Liquid side
Maximum length (per unit) (m)
Minimum length (per unit) (m)
Maximum length (total) (m)
Maximum chargeless length (m)
Additional refriderant
Maximum height difference (m)
Name of refrigerant
Weight (kg)
e (°Indoor (Cooling/Heating)
Power facto
Runnin
Power consum
Power facto
Startin
Unit model
High 45/45
Lo
Heating
Width 790
De
Depth
Type
Model
Gas side
Interconnection
Outdoor (Cooling/Heating)
Wireless remote control
Remote control holde
Pan head wood screw
Su
Super Sterilizer filte
Battery
Mounting screw
Owner's manual
Installation manual
curren
curren
tion
current
th 205
Cooling/Heatin
er Oxi Deo filte
RAS-M07SKV-E, RAS-M10SKV-E, RAS-M13SKV-E, RAS-M16SKV-
∗1
∗1
∗1
∗1
∗1
1 ∗1 ∗1
1 ∗1 ∗1
1 ∗1 ∗1
1 ∗1 ∗1
1 ∗1 ∗1
∗1
∗1
∗1
∗1
∗1
∗1
∗1
∗1
∗1
∗1
∗1
Flare connection
∗1
∗1
∗1
∗1
∗1
∗1
∗1
∗1
R410A
∗1
21 - 32/ -
∗1
1
1
1
2(
3.1 x 16L)
1
1
2
4 x 25L)
6(
1
1
35
75
39/40
33/34
275
790
205
∅6.35
∅9.52
30
65
275
11.5/12.4
RAS-M16SKV-E
6.35
12.7
RAS-M07SKV-E
0.21-0.19
35
75
RAS-M07SKV-E
38/38
33/33
26/28
RAS-M07SKV-E
275
790
205
9
20
8.6/9.5
RAS-M07SKV-E
6.35
9.52
220~240V-1Ph-50Hz / 220V-1Ph-60Hz
RAS-M10SKV-E RAS-M13SKV-E RAS-M16SKV-E
0.21-0.19 0.21-0.19 0.21-0.19
35
75
RAS-M10SKV-E RAS-M13SKV-E RAS-M16SKV-E
38/39
33/34
26/28 30/3126/28
RAS-M10SKV-E RAS-M13SKV-E RAS-M16SKV-E
275
790
205
999
20 20 30
8.6/9.5 9.4/10.5
RAS-M10SKV-E RAS-M13SKV-E
6.35
9.52
3 Wires : includes earth
4 Wires : includes earth
1
1
1
1
1
∗1 : Refer to the service manual of the multi outdoor unit to be combined.
Note
The s
ecifications may be subject to change without notice for purpose of improvement.
– 6 –
r
r
g
y
(kW)
g
(kW)
g
y
(kW)
g
(kW)
pply
r
g
(A)
(W)
r
(%)
r
g
(A)
(W)
r
(%)
(A)
g)
g
r
(
r
g
g
g
(mm)
p
g
(kg)
(W)
)
(
g)
g
(mm)
p
g
(kg)
p
(W)
yp
p
(W)
(
)
(
g)
yp
ping
q
g
)
(m)
g
)
(m)
g
)
(m)
g
(m)
g
(m)
g
ght(kg)
g
y
p
g
r
(
g)
r
(
g)
y
r
p
r
r
y
p
∅
∅
∅
∅
∅
∅
∅
∅
∗
∗
∗
∗
∗
Revised-2
Unit model Indoo
capacit
Coolin
Coolin
capacity range
capacit
Heatin
capacity range
Heatin
Power su
Electric Indoo
characteristic Runnin
COP(Cooling/Heatin
Operatin
noise
dB(A) Heating)
Indoor unit Unit model
Outdoor unit Dimension Hei
Pi
connection
Wirin
connection Power suppl
Usable tem
Accessor
Outdoo
Unit model
Power consumption
Outdoo
Indoo
Cooling/High 45/-
Outdoo
Dimension Hei
Net wei
Fan motor output
Air flow rate(m3/h
Net wei
ressorMotor output
Com
Fan motor out
Air flow rate
e Flare connection
T
Indoor unit Unit model
Outdoor unit Li
Maximum len
Minimum len
Maximum len
Maximum char
Additional refriderant
Maximum hei
Name of refri
Wei
erature ran
e (°C) Indoo
Indoor unit Installation plate
Power facto
Operation mode
Runnin
Power consumption
Power facto
Starting current
Unit model
Medium 40/Low
Coolin
Heatin
ht 275
Width 790
De
ht
ht
th 205
ht
Width
th
De
e
T
Model
ut
m3/h
uid side
Gas side
th (per unit
th (per unit
th (total
eless length
ht difference
erant R410A
Interconnection 4 Wires : includes earth
Outdoo
Wireless remote control
Remote control holde
Pan head wood screw
Su
er Oxi Deo filte
Super Sterilizer filte
Batter
Mounting screw
Owner's manual
Installation manual
current
current
Cooling/Heatin
Cooling/Heatin
Cooling/Heatin
Cooling/Heatin
RAS-M10SKCV-E, RAS-M13SKCV-E, RAS-M16SKCV-E
220~240V-1Ph-50Hz / 220V-1Ph-60Hz
RAS-M10SKCV-E RAS-M13SKCV-E RAS-M16SKCV-E
0.21-0.19 0.21-0.19 0.21-0.19
35 35 30
75 75 65
Cooling Heating
1 −
1 −
1 −
1 −
1 −
RAS-M10SKCV-E RAS-M13SKCV-E
38/- 39/33/- 33/26/- 26/-
RAS-M10SKCV-E RAS-M13SKCV-E RAS-M16SKCV-E
275 275
790 790
205 205
99
20 20 30
8.6/- 9.4/-
RAS-M10SKCV-E RAS-M13SKCV-E
6.35
9.52
3 Wires : includes earth
21 - 32/ -
3.1 x 16L)
2(
6(
∗1
∗1
∗1
−
−
∗1
−
∗1
∗1
∗1
∗1
∗1
∗1
∗1
∗1
∗1
6.35
9.52
∗1
∗1
∗1
∗1
∗1
∗1
∗1
∗1
∗1
∗1
1
1
1
1
1
2
4 x 25L)
1
1
RAS-M16SKCV-E
30/-
9
11.5/-
RAS-M16SKCV-E
6.35
12.7
*1 : Refer to the service manual of the multi outdoor unit to be combined.
Note
The s
ecifications may be subject to change without notice for purpose of improvement.
– 7 –
3. REFRIGERANT R410A
This air conditioner adopts the new refrigerant HFC
(R410A) which does not damage the ozone layer.
The working pressure of the new refrigerant R410A
is 1.6 times higher than conventional refrigerant
(R22). The refrigerating oil is also changed in
accordance with change of refrigerant, so be careful
that water , dust, and existing refrigerant or refrigerating oil are not entered in the refrigerant cycle of the
air conditioner using the new refrigerant during
installation work or servicing time.
The next section describes the precautions for air
conditioner using the new refrigerant. Conforming to
contents of the next section together with the
general cautions included in this manual, perform
the correct and safe work.
3-1. Safety During Installation/Servicing
As R410A’s pressure is about 1.6 times higher than
that of R22, improper installation/servicing may
cause a serious trouble. By using tools and materials exclusive for R410A, it is necessary to carry out
installation/servicing safely while taking the following
precautions into consideration.
1. Never use refrigerant other than R410A in an air
conditioner which is designed to operate with
R410A.
If other refrigerant than R410A is mixed, pressure
in the refrigeration cycle becomes abnormally
high, and it may cause personal injury, etc. by a
rupture.
2. Confirm the used refrigerant name, and use tools
and materials exclusive for the refrigerant R410A.
The refrigerant name R410A is indicated on the
visible place of the outdoor unit of the air conditioner using R410A as refrigerant. To prev ent
mischarging, the diameter of the service port
differs from that of R22.
3. If a refrigeration gas leakage occurs during
installation/servicing, be sure to ventilate fully.
If the refrigerant gas comes into contact with fire,
a poisonous gas may occur.
4. When installing or removing an air conditioner , do
not allow air or moisture to remain in the refrigeration cycle. Otherwise, pressure in the refrigeration cycle may become abnormally high so
that a rupture or personal injury may be caused.
5. After completion of installation work, check to
make sure that there is no refrigeration gas
leakage.
If the refrigerant gas leaks into the room, coming
into contact with fire in the fan-driven heater,
space heater, etc., a poisonous gas may occur.
6. When an air conditioning system charged with a
large volume of refrigerant is installed in a small
room, it is necessary to exercise care so that,
even when refrigerant leaks, its concentration
does not exceed the marginal le vel.
If the refrigerant gas leakage occurs and its
concentration exceeds the marginal le vel, an
oxygen starvation accident may result.
7. Be sure to carry out installation or removal
according to the installation manual.
Improper installation may cause refrigeration
trouble, water leakage , electric shock, fire, etc.
8. Unauthorized modifications to the air conditioner
may be dangerous. If a breakdown occurs
please call a qualified air conditioner technician
or electrician.
Improper repair’s may result in water leakage,
electric shock and fire, etc.
3-2. Refrigerant Piping Installation
3-2-1. Piping Materials and Joints Used
For the refrigerant piping installation, copper pipes
and joints are mainly used. Copper pipes and joints
suitable for the refrigerant m ust be chosen and
installed. Furthermore, it is necessary to use clean
copper pipes and joints whose interior surfaces are
less affected by contaminants .
1. Copper Pipes
It is necessary to use seamless copper pipes
which are made of either copper or copper alloy
and it is desirable that the amount of residual oil
is less than 40 mg/10 m. Do not use copper
pipes having a collapsed, deformed or discolored
portion (especially on the interior surface).
Otherwise, the expansion valve or capillary tube
may become blocked with contaminants.
As an air conditioner using R410A incurs pressure higher than when using R22, it is necessary
to choose adequate materials.
Thicknesses of copper pipes used with R410A
are as shown in Table 3-2-1. Never use copper
pipes thinner than 0.8 mm even when it is
available on the market.
– 8 –
Table 3-2-1 Thicknesses of annealed copper pipes
Thickness (mm)
Nominal diameter
1/4
3/8
1/2
5/8
Outer diameter (mm)
6.35
9.52
12.70
15.88
R410A R22
0.80 0.80
0.80 0.80
0.80 0.80
1.00 1.00
2. Joints
For copper pipes, flare joints or socket joints are used. Prior to use, be sure to remove all contaminants.
a) Flare Joints
Flare joints used to connect the copper pipes cannot be used for pipings whose outer diameter exceeds
20 mm. In such a case, socket joints can be used.
Sizes of flare pipe ends, flare joint ends and flare nuts are as shown in Tables 3-2-3 to 3-2-6 below.
b) Socket Joints
Socket joints are such that they are brazed for connections, and used mainly for thick pipings whose
diameter is larger than 20 mm.
Thicknesses of sock et joints are as shown in Table 3-2-2.
Table 3-2-2 Minimum thic knesses of socket joints
Nominal diameter
1/4
3/8
1/2
5/8
Reference outer diameter of
copper pipe jointed (mm)
6.35
9.52
12.70
15.88
Minimum joint thickness
(mm)
0.50
0.60
0.70
0.80
3-2-2. Processing of Piping Materials
When performing the refrigerant piping installation, care should be taken to ensure that water or dust does not
enter the pipe interior, that no other oil than lubricating oils used in the installed air-water heat pump is used,
and that refrigerant does not leak. When using lubricating oils in the piping processing, use such lubricating oils
whose water content has been removed. When stored, be sure to seal the container with an airtight cap or any
other cover.
1. Flare processing procedures and precautions
a) Cutting the Pipe
By means of a pipe cutter, slowly cut the pipe so that it is not deformed.
b) Removing Burrs and Chips
If the flared section has chips or burrs, refrigerant leakage ma y occur.
Carefully remove all burrs and clean the cut surface before installation.
c) Insertion of Flare Nut
– 9 –
d) Flare Processing
Make certain that a clamp bar and copper
pipe have been cleaned.
By means of the clamp bar, perform the flare
processing correctly.
Use either a flare tool for R410A or conventional flare tool.
Flare processing dimensions differ according
to the type of flare tool. When using a conventional flare tool, be sure to secure “dimen-
sion A” by using a gauge for size adjustment.
Table 3-2-3 Dimensions related to flare processing for R410A
Nominal
diameter
Outer
diameter
(mm)
Thickness
(mm)
Fig. 3-2-1 Flare pr ocessing dimensions
Flare tool for R410A
clutch type
ØD
A
A (mm)
Conventional flare tool
Clutch type Wing nut type
1/4
3/8
1/2
5/8
Nominal
diameter
1/4
3/8
1/2
5/8
6.35
9.52
12.70
15.88
0.8
0.8
0.8
1.0
0 to 0.5
0 to 0.5
0 to 0.5
0 to 0.5
Table 3-2-4 Dimensions related to flare processing for R22
Outer
diameter
(mm)
6.35
9.52
12.70
15.88
Thickness
(mm)
0.8
0.8
0.8
1.0
Flare tool for R22
clutch type
0 to 0.5
0 to 0.5
0 to 0.5
0 to 0.5
1.0 to 1.5 1.5 to 2.0
1.0 to 1.5 1.5 to 2.0
1.0 to 1.5 2.0 to 2.5
1.0 to 1.5 2.0 to 2.5
A (mm)
Conventional flare tool
Clutch type Wing nut type
0.5 to 1.0 1.0 to 1.5
0.5 to 1.0 1.0 to 1.5
0.5 to 1.0 1.5 to 2.0
0.5 to 1.0 1.5 to 2.0
Nominal
diameter
1/4
3/8
1/2
5/8
Table 3-2-5 Flare and flare nut dimensions for R410A
Outer diameter
(mm)
6.35
9.52
12.70
15.88
Thickness
(mm)
0.8
0.8
0.8
1.0
Dimension (mm)
ABCD
9.1 9.2 6.5 13
13.2 13.5 9.7 20
16.6 16.0 12.9 23
19.7 19.0 16.0 25
– 10 –
Flare nut width
(mm)
17
22
26
29
Table 3-2-6 Flare and flare nut dimensions for R22
Nominal
diameter
1/4
3/8
1/2
5/8
3/4
Outer diameter
(mm)
6.35
9.52
12.70
15.88
19.05
45˚ to 46˚
Thickness
(mm)
0.8
0.8
0.8
1.0
1.0
B A
Dimension (mm)
ABCD
9.0 9.2 6.5 13
13.0 13.5 9.7 20
16.2 16.0 12.9 20
19.7 19.0 16.0 23
23.3 24.0 19.2 34
D
C
43˚ to 45˚
Flare nut width
(mm)
17
22
24
27
36
Fig. 3-2-2 Relations between flare nut and flare seal surface
2. Flare Connecting Procedures and Precautions
a) Make sure that the flare and union portions do not have any scar or dust, etc.
b) Correctly align the processed flare surface with the union axis.
c) Tighten the flare with designated torque by means of a torque wrench. The tightening torque for R410A is
the same as that for conventional R22. Incidentally, when the torque is weak, the gas leakage may occur.
When it is strong, the flare nut may crack and may be made non-removable. When choosing the tighten-
ing torque, comply with values designated by man ufacturers. Table 3-2-7 shows reference values.
NOTE :
When applying oil to the flare surface, be sure to use oil designated by the manufacturer.
If any other oil is used, the lubricating oils may deteriorate and cause the compressor to burn out.
Table 3-2-7 Tightening torque of flare for R410A [Reference values]
Nominal
diameter
Outer diameter
(mm)
Tightening torque
N•m (kgf•cm)
Tightening torque of torque
wrenches available on the market
N•m (kgf•cm)
1/4
3/8
1/2
5/8
6.35
9.52
12.70
15.88
14 to 18 (140 to 180)
33 to 42 (330 to 420)
50 to 62 (500 to 620)
63 to 77 (630 to 770)
– 11 –
16 (160), 18 (180)
42 (420)
55 (550)
65 (650)
3-3. Tools
3-3-1. Required T ools
The service port diameter of packed valve of the outdoor unit in the air-water heat pump using R410A is
changed to prev ent mixing of other refrigerant. To reinforce the pressure-resisting strength, flare processing
dimensions and opposite side dimension of flare nut (For Ø12.7 copper pipe) of the refrigerant piping are
lengthened.
The used refrigerating oil is changed, and mixing 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 con ventional refrigerant (R22)
The table below shows the tools exclusive f or 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
air-water heat pump installation
No.
1
2
3
4
5
6
7
8
9
10
(Note 1) When flaring is carried out for R410A using the conventional flare tools, adjustment of projection
(Note 2) Charging cylinder for R410A is being currently developed.
Used tool
Flare tool
Copper pipe gauge for
adjusting projection
margin
Torque wrench
(For Ø12.7)
Gauge manifold
Charge hose
Vacuum pump adapter
Electronic balance for
refrigerant charging
Refrigerant cylinder
Leakage detector
Charging cylinder
margin is necessary. For this adjustment, a copper pipe gauge, etc. are necessary.
Pipe flaring
Flaring by
conventional flare tool
Connection of flare nut
Evacuating, refrigerant
charge, run check, etc.
Vacuum evacuating
Refrigerant charge
Refrigerant charge
Gas leakage check
Refrigerant charge
Usage
Existence of
new equipment
for R410A
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
(Note 2)
R410A
Whether conventional equipment
can be used
*(Note 1)
*(Note 1)
×
×
×
×
×
×
×
Conventional air-water
heat pump installation
Whether new equipment
can be used with
conventional refrigerant
¡
*(Note 1)
×
×
¡
¡
×
¡
×
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.
2. Torque wrench (For Ø6.35, Ø9.52)
3. Pipe cutter
4. Reamer
5. Pipe bender
6. Level vial
7. Screwdriver (+, –)
8. Spanner or Monkey wrench
9. Hole core drill (Ø65)
10. Hexagon wrench
(Opposite side 4mm)
11 . Tape measure
12. Metal saw
Also prepare the following equipments for other installation method and run check.
1. Clamp meter
2. Thermometer
3. Insulation resistance tester
4. Electroscope
– 12 –
3-4. Recharging of Refrigerant
When it is necessary to recharge refrigerant, charge the specified amount of new refrigerant according to the
following steps .
Recover the refrigerant, and check no refrigerant
remains in the equipment.
Connect the charge hose to packed valve service
port at the outdoor unit’s gas side.
Connect the charge hose to the vacuum pump
adapter.
Open fully both packed valves at liquid and gas
sides.
When the compound gauge’s pointer has indicated
–0.1 Mpa (–76 cmHg), place the handle Low in the
fully closed position, and turn off the vacuum pump’s
power switch.
Keep the status as it is for 1 to 2 minutes, and ensure
that the compound gauge’s pointer does not return.
Set the refrigerant cylinder to the electronic balance,
connect the connecting hose to the cylinder and the
connecting port of the electronic balance, and charge
liquid refrigerant.
Place the handle of the gauge manifold Low in the
fully opened position, and turn on the vacuum pump’s
power switch. Then, evacuating the refrigerant in the
cycle.
(For refrigerant charging, see the figure below.)
1. Never charge refrigerant exceeding the specified amount.
2. If the specified amount of refrigerant cannot be charged, charge refrigerant bit by bit in COOL mode.
3. Do not carry out additional charging.
When additional charging is carried out if refrigerant leaks, the refrigerant composition changes in the
refrigeration cycle, that is characteristics of the air conditioner changes, refrigerant exceeding the
specified amount is charged, and working pressure in the refrigeration cycle becomes abnormally high
pressure, and may cause a rupture or personal injury.
(Water heat
exchanger unit)
Opened
(Outdoor unit)
Refrigerant cylinder
(with siphon)
Check valve
Opened
Open/close
valve for charging
Electronic balance for refrigerant charging
Fig. 3-4-1 Configuration of refrigerant charging
Opened
Closed
Service port
– 13 –
1. Be sure to make setting so that liquid can be charged.
2. When using a cylinder equipped with a siphon, liquid can be charged without turning it upside down.
It is necessary for charging refrigerant under condition of liquid because R410A is mixed type of refrigerant.
Accordingly, when charging refrigerant from the refrigerant cylinder to the equipment, charge it turning the
cylinder upside down if cylinder is not equipped with siphon.
[ Cylinder with siphon ] [ Cylinder without siphon ]
Gauge manifold
OUTDOOR unit
Refrigerant
cylinder
Gauge manifold
OUTDOOR unit
cylinder
Refrigerant
Electronic
balance
R410A refrigerant is HFC mixed refrigerant.
Therefore, if it is charged with gas, the composition of the charged refrigerant changes and the
characteristics of the equipment varies.
3-5. Brazing of Pipes
3-5-1. Materials for Brazing
1. Silver brazing filler
Silver brazing filler is an alloy mainly composed
of silver and copper. It is used to join iron, copper
or copper alloy, and is relatively expensive though
it excels in solderability.
2. Phosphor bronze brazing filler
Phosphor bronze brazing filler is generally used
to join copper or copper alloy.
Electronic
balance
Siphon
Fig. 3-4-2
1. Phosphor bronze brazing filler tends to react
with sulfur and produce a fragile compound
water solution, which may cause a gas
leakage. Therefore, use any other type of
brazing filler at a hot spring resort, etc., and
coat the surface with a paint.
2. When performing brazing again at time of
servicing, use the same type of brazing filler.
3-5-2. Flux
3. Low temperature brazing filler
Low temperature brazing filler is generally called
solder, and is an alloy of tin and lead. Since it is
weak in adhesive strength, do not use it for
refrigerant pipes.
1. Reason why flux is necessary
• By removing the oxide film and any foreign
matter on the metal surface, it assists the flow
of brazing filler .
• In the brazing process, it prevents the metal
surface from being oxidized.
• By reducing the brazing filler’s surface tension,
the brazing filler adheres better to the treated
metal.
– 14 –
2. Characteristics required for flux
• Activated temperature of flux coincides with the
brazing temperature.
• Due to a wide effective temperature range, flux
is hard to carbonize.
• It is easy to remove slag after brazing.
• The corrosive action to the treated metal and
brazing filler is minimum.
• It excels in coating performance and is harmless to the human body.
As the flux works in a complicated manner as
described above, it is necessary to select an
adequate type of flux according to the type and
shape of treated metal, type of brazing filler and
brazing method, etc.
3. Types of flux
• Noncorrosive flux
Generally, it is a compound of borax and boric
acid.
It is effective in case where the brazing temperature is higher than 800°C.
• Activated flux
Most of fluxes generally used for silver brazing
are this type.
It features an increased o xide film removing
capability due to the addition of compounds
such as potassium fluoride, potassium chloride
and sodium fluoride to the borax-boric acid
compound.
4. Piping materials for brazing and used
brazing filler/flux
3-5-3. Brazing
As brazing work requires sophisticated techniques,
experiences based upon a theoretical knowledge, it
must be performed by a person qualified.
In order to prev ent the oxide film from occurring in
the pipe interior during brazing, it is effective to
proceed with brazing while letting dry Nitrogen gas
(N2) flow.
Never use gas other than Nitrogen gas.
1. Brazing method to prevent oxidation
1) Attach a reducing valve and a flow-meter to
the Nitrogen gas cylinder.
2) Use a copper pipe to direct the piping material, and attach a flow-meter to the cylinder.
3) Apply a seal onto the clearance between the
piping material and inserted copper pipe for
Nitrogen in order to prevent backflow of the
Nitrogen gas.
4) When the Nitrogen gas is flowing, be sure to
keep the piping end open.
5) Adjust the flow rate of Nitrogen gas so that it
is lower than 0.05 m3/Hr or 0.02 MPa
(0.2kgf/cm2) by means of the reducing valve.
6) After performing the steps above, keep the
Nitrogen gas flowing until the pipe cools down
to a certain extent (temperature at which
pipes are touchable with hands).
7) Remove the flux completely after brazing.
Piping material
Copper - Copper
Copper - Iron
Iron - Iron
Used brazing filler
Phosphor copper
Silver
Silver
Used flux
Do not use
Paste flux
Vapor flux
1. Do not enter flux into the refrigeration cycle.
2. When chlorine contained in the flux remains
within the pipe, the lubricating oil deteriorates.
Therefore, use a flux which does not contain
chlorine.
3. When adding water to the flux, use water
which does not contain chlorine (e.g. distilled
water or ion-exchange water).
4. Remove the flux after brazing.
M
Flow meter
Stop valve
Nitrogen gas
cylinder
From Nitrogen cylinder
Pipe
Nitrogen
gas
Rubber plug
Fig. 3-5-1 Prevention of oxidation during brazing
– 15 –
4. CONSTRUCTION VIEWS
RAS-M07SKV-E, RAS-M10SKV-E, RAS-M13SKV-E, RAS-M16SKV-E
RAS-M10SKCV-E, RAS-M13SKCV-E, RAS-M16SKCV-E
790
Revised-2
Front panel
63
7
48
Knock out system
275
Air filter
116
Air inlet
Heat exchanger
Installation plate hanger
62 69
193480
205
Knock out system
49
56
Wireless remote controller
48
63
7
157
19
Installation plate hanger
Connecting pipe (0.35m)
(For 07,10,13 series; Flare
(For 16 series; Flare
84.5
Minimum
distance
to wall
275
170 or more
40
84.5 150 84.5
9.52mm)
12.7mm)
Hanger
621
235
215
Hanger
Minimum
distance
to ceiling
215
160.5 160.5 150
Center line
Drain hose (0.50m)
Connecting pipe (0.40m)
(Flare 6.35mm)
235
65 or more
Hanger
Installation plate outline
84.5
Minimum
distance
to wall
170 or more
63
Remote controller holder
26
45
190
40
125
– 16 –
5. WIRING DIAGRAM
5-1. RAS-M07SKV-E, RAS-M10SKV-E, RAS-M13SKV-E,
RAS-M10SKCV-E, RAS-M13SKCV-E
Revised-2
– 17 –
5-2. RAS-M16SKV-E
RAS-M16SKCV-E
Revised-2
– 18 –
Indoor Unit
Revised-2
6. SPECIFICATIONS OF ELECTRICAL PARTS
No.
Fan motor
1
(for indoor)
2 Room temp. sensor (TA-sensor)
3 Heat exchanger temp. sensor (TC-sensor)
4 Louver motor Output (Rated) 1W, 16 poles, DC12V
Parts name
M07SKV-E, M10SKV-E,
M13SKV-E, M10SKCV-E,
M13SKCV-E
M16SKV-E, M16SKCV-E DC 340V, 30W
AFS-220-20-4AR AC240V, 20W
ICF-340-30-2B
( − )
( − )
MP24Z3T
10kΩ at 25°C
10kΩ at 25°C
SpecificationsType
– 19 –
7. REFRIGERANT CYCLE DIAGRAM
T1
INDOOR UNIT
Indoor heat
exchanger
Temp. measurement
TCJ
TC
Revised-2
Cross flow fan
P
Pressure measurement
Gauge attaching port
Vacuum pump connecting port
Deoxidized copper pipe
Outer dia. : 9.52mm
Thickness : 0.8mm
M16SKV-E, M16SKCV-E
Deoxidized copper pipe
Outer dia. : 12.7mm
Thickness : 0.8mm
∗
1 : Refer to the service manual of multi outdoor unit to be combined.
Deoxidized copper pipe
Outer dia. : 6.35mm
Thickness : 0.8mm
Sectional shape
of heat insulator
TA
Allowable height
difference : 10m
Allowable pipe length
Max. : ∗1
Min. : ∗1
Chargeless : ∗1
Charge : ∗1
– 20 –
8. CONTROL BLOCK DIAGRAM
8-1. Indoor Unit
RAS-M07SKV-E, RAS-M10SKV-E, RAS-M13SKV-E, RAS-M16SKV-E
Revised-2
Heat Exchanger Sensor (Tcj)
Heat Exchanger Sensor (Tc)
Heat Exchanger Sensor (Tc)
Room Temperature Sensor (Ta)
Infrared Rays Signal Receiver
and Indication
Initializing Circuit
Clock Frequency
Oscillator Circuit
Power Supply
Circuit
Converter
(D.C circuit)
Noise Filter
M.C.U.
Functions
• Cold draft preventing Function
• 3-minute Delay at Restart for Compressor
• Fan Motor Starting Control
• Processing
(Temperature Processing)
• Timer
• Serial Signal Communication
• Clean Function
Serial Signal Transmitter/Receiver
Indoor Unit Control Unit
Louver
Motor
Louver Motor
Drive Control
Indoor Fan
Motor Control
Indoor
Fan Motor
From Outdoor Unit
~
220-240V
220V ~60Hz
50Hz
REMOTE CONTROLLER
Serial Signal Communication
(Operation Command and Information)
Remote Controller
Operation (START/STOP)
Operation Mode Selection
AUTO, COOL, DRY, HEAT
Thermo. Setting
Fan Speed Selection
ON TIMER Setting
OFF TIMER Setting
Louver AUTO Swing
Louver Direction Setting
ECO
Hi-POWER
Infrared Rays, 36.7kHz
COMFORT SLEEP
QUIET
– 21 –
RAS-M10SKCV-E, RAS-M13SKCV-E, RAS-M16SKCV-E
Heat Exchanger Sensor (Tcj)
Heat Exchanger Sensor (Tc)
Room Temperature Sensor (Ta)
Infrared Rays Signal Receiver
and Indication
Initializing Circuit
Clock Frequency
Oscillator Circuit
Power Supply
Circuit
Converter
(D.C circuit)
Noise Filter
M.C.U.
Functions
• Cold draft preventing Function
• 3-minute Delay at Restart for Compressor
• Fan Motor Starting Control
• Processing
(Temperature Processing)
• Timer
• Serial Signal Communication
• Clean Function
Serial Signal Transmitter/Receiver
Indoor Unit Control Unit
Louver
Motor
Louver Motor
Drive Control
Indoor Fan
Motor Control
Indoor
Fan Motor
From Outdoor Unit
~
220-240V
220V ~60Hz
50Hz
REMOTE CONTROLLER
Serial Signal Communication
(Operation Command and Information)
Remote Controller
Operation (START/STOP)
Operation Mode Selection
AUTO, COOL, DRY, Fan only
Thermo. Setting
Fan Speed Selection
ON TIMER Setting
OFF TIMER Setting
Louver AUTO Swing
Louver Direction Setting
ECO
Hi-POWER
Infrared Rays, 36.7kHz
COMFORT SLEEP
QUIET
– 22 −
9. OPERATION DESCRIPTION
9-1. Outline of Air Conditioner Control
This air conditioner is a capacity-variable type air
conditioner, which uses AC or DC motor for the indoor
for motor and the outdoor fan motor. And the capacityproportional control compressor mounted. The DC
motor drive circuit is mounted to the indoor unit.
The compressor and the inverter to control fan motor
are mounted to the outdoor unit.
The entire air conditioner is mainly controlled by the
indoor unit controller.
The indoor unit controller drives the indoor fan motor
based upon command sent from the remote controller,
and transfers the operation command to the outdoor
unit controller.
The outdoor unit controller receives operation command from the indoor unit side, and controls the
outdoor fan and the pulse motor valve. (P.M.V)
Besides, detecting revolution position of the compressor motor, the outdoor unit controller controls speed of
the compressor motor by controlling output voltage of
the inverter and switching timing of the supply power
(current transfer timing) so that motors drive according
to the operation command.
And then, the outdoor unit controller transfers reversely
the operating status information of the outdoor unit to
control the indoor unit controller.
As the compressor adopts four-pole brushless
DC motor, the frequency of the suppl y power
from inverter to compressor is two-times cycles
of the actual number of revolution.
1. Role of indoor unit controller
The indoor unit controller judges the operation
commands from the remote controller and assumes
the following functions.
• Judgment of suction air temperature of the indoor
heat exchanger by using the indoor temp. sensor.
(TA sensor)
• Judgment of the indoor heat exchanger temperature by using heat exchanger sensor (TC sensor)
(Prevent-freezing control, etc.)
• Louver motor control
• Indoor fan motor operation control
• LED (Light Emitting Diode) display control
• Transferring of operation command signal (Serial
signal) to the outdoor unit
• Reception of information of operation status
(Serial signal including outside temp. data) to the
outdoor unit and judgment/display of error
2. Role of outdoor unit controller
Receiving the operation command signal (Serial
signal) from the indoor unit controller, the outdoor
unit performs its role.
• Compressor operation control
• Operation control of outdoor fan motor
• P.M.V. control
• 4-way valve control (Heat Pump model only)
• Detection of inverter input current and current
release operation
• Over-current detection and prevention operation
to IGBT module (Compressor stop function)
• Compressor and outdoor fan stop function when
serial signal is off (when the serial signal does not
reach the board assembly of outdoor control by
trouble of the signal system)
• Transferring of operation information (Serial
signal) from outdoor unit controller to indoor unit
controller
• Detection of outdoor temperature and operation
revolution control
• Defrost control in heating operation (Temp.
measurement by outdoor heat exchanger and
control for 4-way valve and outdoor fan)
3. Contents of operation command signal
(Serial signal) from indoor unit controller to
outdoor unit controller
The following three types of signals are sent from
the indoor unit controller.
• Operation mode set on the remote controller
• Compressor revolution command signal defined
by indoor temperature and set temperature
(Correction along with variation of room temperature and correction of indoor heat exchanger
temperature are added.)
• Temperature of indoor heat exchanger
• For these signals ([Operation mode] and [Com-
pressor revolution] indoor heat exchanger temperature), the outdoor unit controller monitors the
input current to the inverter, and performs the
followed operation within the range that current
does not exceed the allowable value.
4. Contents of operation command signal
(Serial signal) from outdoor unit controller
to indoor unit controller
The following signals are sent from the outdoor unit
controller.
• The current operation mode
• The current compressor revolution
• Outdoor temperature
• Existence of protective circuit operation
For transferring of these signals, the indoor unit
controller monitors the contents of signals, and
judges existence of trouble occurrence.
Contents of judgment are described below.
• Whether distinction of the current operation
status meets to the operation command signal
• Whether protective circuit operates
When no signal is received from the outdoor
unit controller, it is assumed as a trouble.
Operations followed to judgment
of serial signal from indoor side.
− 23 −
9-2. Operation Description
1. Basic operation ........................................................................................................... 25
1. Operation control ................................................................................................... 25
2. Operating mode selection when performing 2-room operation ......................... 26
3.
Cooling/Heating operation
4. AUTO operation .................................................................................................... 27
5. DRY operation ....................................................................................................... 27
2. Indoor fan motor control ............................................................................................. 28
3.
Capacity control .......................................................................................................... 30
4. Release protective control by temperature of indoor heat exchanger........................ 31
5. Louver control ............................................................................................................. 32
1) Louver position....................................................................................................... 32
2) Air direction adjustment ......................................................................................... 32
3) Swing ..................................................................................................................... 32
6. ECO operation ............................................................................................................ 33
7. Temporary operation................................................................................................... 34
8. Self-Cleaning function ................................................................................................ 35
9. Selt-Cleaning function release ................................................................................... 36
10. Remote-A or B selection ............................................................................................ 37
11. QUIET mode ............................................................................................................. 38
12. COMFORT SLEEP mode ......................................................................................... 38
.....................................................................................
26
13. Short Timer ................................................................................................................ 38
14. One-Touch Comfort .................................................................................................. 39
15. Hi-POWER Mode ...................................................................................................... 39
16. FIL
TER Indicator ...............................................................................................39
9-3. Auto Restart Function ................................................................................................40
9-3-1. How to Set the A uto Restart Function .............................. ........................................ 40
9-3-2. How to Cancel the Au to Restar t Function ................................................................ 41
9-3-3. Power Failure During Timer Operation ................................................................... 41
9-4. Remote Controller and Its Fuctions .................................................................... 42
9-4-1. Parts Name of Remote Contr oller ............................................................................. 42
9-4-2. Operation of remote control ...................................................................................... 42
9-4-3. Name and Functions of Indications on Remote Contr oller ....................................... 45
– 24 −
Item
Operation flow and applicable data, etc.
Description
1. Basic
operation
1. Operation control
Receiving the user’s operation condition setup, the operation statuses of indoor/outdoor units are
controlled.
1) The operation conditions are selected by the remote controller as shown in the below.
2) A signal is sent by ON button of the remote controller.
3) The signal is received by a sensor of the indoor unit and processed by the indoor controllers as
shown in the below.
4) The indoor controller controls the indoor fan motor and louver motor.
5) The indoor controller sends the operation command to the outdoor controller, and sends/receives
the control status with a serial signal.
6) The outdoor controller controls the operation as shown in the left, and also controls the compressor, outdoor fan motor, 4-way valve and pulse motor valve.
Selection of
operation conditions
ON/OFF
Remote controller
Control contents of remote controller
• ON/OFF
• Operation select
• Temperature setup
• Air direction
• Swing
• Air volume select (AUTO/LOW/LOW+/MED/MED+/HIGH)
• ECO
• ON timer setup
• OFF timer setup
• Hi-POWER
• COMFORT SLEEP
• QUIET
• PRESET
• ONE-TOUCH
Signal receiving
Indoor unit control
Operation command
Serial signal send/receive
Serial signal send/receive
Outdoor unit control
Indoor unit
Indoor unit control
• Command signal generating function of
indoor unit operation
• Calculation function (temperature calculation)
• Activation compensation function of indoor fan
• Cold draft preventive function
• Timer function
• Indoor heat exchanger release control
Outdoor unit
Outdoor unit control
• Frequency control of inverter output
• Waveform composite function
• Calculation function
(Temperature calculation)
• AD conversion function
• Quick heating function
• Delay function of compressor reactivation
• Current release function
• GTr over-current preventive function
• Defrost operation function
• Indoor fan motor
• Louver motor
~
Inverter
• Compressor
• Outdoor fan motor
• 4-way valve
• Pulse motor valve
(P.M.V.)
– 25 –
Item
ol
Operation flow and applicable data, etc.
Description
1. Basic
operation
2. Operating mode selection when performing 2-room operation
1) The outdoor unit operation mode conforms to the instructions of the indoor unit that was pressed first.
2) When combined operation consisting of cooling (dry) and heating, fan and heating, or cleaning
operation and heating is performed, operation conforms to the instructions of the indoor unit that
was pressed first as shown in the following table.
3) The indoor fan stops for the indoor unit that was pressed last and which instructions are ignored.
4) When three or four indoor units are operated concurrently, the priority is also given to operating
mode of the indoor unit which was pressed first as same as the case when two indoor units are
operated concurrently.
No. Indoor unit Set operating mode Actual indoor unit operation Actual outdoor unit operation
Pressed first Cooling (dry) Cooling (dry)
1
Pressed last Cooling (dry) Cooling (dry)
Pressed first Heating Heating
2
Pressed last Heating Heating
Pressed first Fan only Fan only
3
Pressed last Fan only Fan only
Pressed first Fan only Fan only
4
Pressed last Cooling (dry) Cooling (dry)
Pressed first Cooling (dry) Cooling (dry)
5
Pressed last Fan only Fan only
Pressed first Cooling (dry) Cooling (dry)
6
Pressed last Heating Fan stopped
Pressed first Heating Heating
7
Pressed last Cooling (dry) Fan stopped
Pressed first Cleaning operation Cleaning operation
8
Pressed last Cleaning operation Cleaning operation
Pressed first Cleaning operation Cleaning operation
9
Pressed last Cooling (dry) Cooling (dry)
Pressed first Cooling (dry) Cooling (dry)
10
Pressed last Cleaning operation Cleaning operation
Pressed first Cleaning operation Cleaning operation
11
Pressed last Fan only Fan only
Pressed first Fan only Fan only
12
Pressed last Cleaning operation Cleaning operation
Pressed first Cleaning operation Cleaning operation
13
Pressed last Heating Fan stopped
Pressed first Heating Heating
14
Pressed last Cleaning operation Fan stopped
Cooling
Heating
Stopped
Cooling
Cooling
Cooling
Heating
Stopped
Cooling
Cooling
Stopped
Stopped
Stopped
Heating
3. Cooling/Heating operation
The operations are performed in the following parts by controls according to cooling/heating conditions.
1) Receiving the operation ON signal of the remote controller, the cooling or heating operation signal
starts being transferred from the indoor controller to the outdoor unit.
2) At the indoor unit side, the indoor fan is operated according to the contents of "2. Indoor fan
motor contr l" and the louver according to the contents of "9. Louver control", respectively.
3) The outdoor unit controls the outdoor fan motor, compressor, pulse motor valve and
4-way valve according to the operation signal sent from the indoor unit.
*1. The power coupler of 4-way valve is usually turned off, and it is turned on during defrost
operation. (Only in heating)
Operation On
Indoor unit control
Setup of remote controller
Indoor fan motor control / Louver control
Sending of operation command signal
Compressor revolution control / Outdoor fan motor control / 4-way valve contr
Outdoor unit control [In cooling operation: OFF, In heating operation: ON]
Pulse motor valve control
– 26 –
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