Toshiba RAS-M10YKV-E User manual

SERVICE MANUAL
FILE NO. A00-9906
AIR-CONDITIONER
SUPPLEMENT
SPLIT TYPE
PRINTED IN JAPAN, Nov.,1999 ToMo
RAS-M10YKV-E, RAS-M13YKV-E /
RAS-M18YAV-E
R AS-M10YKCV-E, RAS-M13YKCV-E /
RAS-M18YACV-E
R410A

– 2 –
CONTENTS
1. SPECIFICATIONS ...................................................................................... 3
2. REFRIGERANT R410A.............................................................................. 8
3. CONSTRUCTION VIEWS......................................................................... 16
4. WIRING DIAGRAM................................................................................... 18
5. SPECIFICATIONS OF ELECTRICAL PARTS.......................................... 21
6. REFRIGERANT CYCLE DIAGRAM......................................................... 22
7. CONTROL BLOCK DIAGRAM................................................................. 25
8. OPERATION DESCRIPTION ................................................................... 28
9. INSTALLATION PROCEDURE ................................................................ 41
10. HOWTO DIAGNOSE THE TROUBLE ...................................................... 49
11. HOWTO REPLACE THE MAIN PARTS ................................................... 69
12. EXPLODED VIEWS AND PARTS LIST.................................................... 80

– 3 –
1. SPECIFICATIONS
1-1. Specifications
RAS-M10YKV-E, RAS-M13YKV-E / RAS-M18YAV-E
• For performance when each indoor unit is combined with other unit, refer to the separate table.
• The specifications may be subject to change without notice for purpose of improvement.
Unit model Indoor
Outdoor
Current limited
Cooling capacity (kW)
Cooling capacity range (kW)
Heating capacity (kW)
Heating capacity range (kW)
Power supply
Electric Indoor Unit model
characteristics Running current (A)
Power consumption (W)
Power factor (%)
Outdoor Unit model
Operation mode
Running current (A)
Power consumption (W)
Power factor (%)
Starting current (A)
COP (Cooling/Heating)
Operating noise Indoor Unit model
High (dB•A)
Medium (dB•A)
Low (dB•A)
Outdoor Unit model
10-1 indoor unit operating (dB•A)
13-1 indoor unit operating (dB•A)
2 indoor unit operating (dB•A)
Indoor unit Unit model
Dimension Height (mm)
Width (mm)
Depth (mm)
Net weight (kg)
Fan motor output (W)
Air flow rate (Cooling/Heating) (m3/h)
Outdoor unit Unit model
Dimension Height (mm)
Width (mm)
Depth (mm)
Net weight (kg)
Compressor Motor output (W)
Type
Model
Fan motor output (W)
Air flow rate (m3/h)
Piping connection Type
Indoor unit Unit model
Liquid side
Gas side
Outdoor unit Unit model
A unit liquid side/gas side
B unit liquid side/gas side
Maximum length (per unit) (m)
Maximum length (total) (m)
Maximum chargeless length (m)
Maximum height difference (m)
Refrigerant Name of refrigerant
Weight (kg)
Wiring connection Power supply
Interconnection
Usable temperature range Indoor (Cooling/Heating) (°C)
Outdoor (Cooling/Heating) (°C)
Accessory Indoor unit Installation plate
Wireless remote control
Label
Remote control holder
Pan head wood screw
Purifying filter
Deodorizing filter
Batteries
Mounting screw
Installation manual
Outdoor unit Installation manual
Owner's manual
RAS-M10YKV-E, RAS-M13YKV-E
RAS-M18YAV-E
—
5,2
1,4 – 6,2
6,7
0,9 – 8,7
220 – 230 – 240V – 1Ph – 50 Hz
RAS-M10YKV-E RAS-M13YKV-E
0,15 0,15
30 30
87 87
RAS-M18YAV-E
Cooling Heating
7,90 / 7,57 / 7,28 8,55 / 8,17 / 7,81
1660 1790
95% 95%
9,86 / 9,43 / 9,04
3,02 / 3,62
RAS-M10YKV-E (Cooling / Heating) RAS-M13YKV-E (Cooling / Heating)
36 / 39 39 / 40
33 / 35 35 / 35
30 / 30 30 / 30
RAS-M18YAV-E (Cooling / Heating)
42 / 45
46 / 49
46 / 49
RAS-M10YKV-E RAS-M13YKV-E
265 265
790 790
189 189
88
19 19
470 / 520 520 / 560
RAS-M18YAV-E
550
780
270
44
1100
Twin rotary type with DC-inverter variable speed control
DA130A1F-21F
40
2060
Flare connection
RAS-M10YKV-E RAS-M13YKV-E
Ø6,35 Ø6,35
Ø9,52 Ø9,52
RAS-M18YAV-E
Ø6,35 / Ø9,52
Ø6,35 / Ø9,52
20
30
30
10
R410A
1,15
3 Wires : includes earth
4 Wires : includes earth
21 – 32 / 0 – 28
21 – 43 / –5 – 21
1
1
2
1
2 (Ø3,1 x 16L)
1
1
2
6 (Ø4 x 25L)
1
1
1

– 4 –
RAS-M10YKCV-E, RAS-M13YKCV-E / RAS-M18YACV-E
• For performance when each indoor unit is combined with other unit, refer to the separate table.
• The specifications may be subject to change without notice for purpose of improvement.
Unit model Indoor
Outdoor
Cooling capacity (kW)
Cooling capacity range (kW)
Power supply
Electric Indoor Unit model
characteristics Running current (A)
Power consumption (W)
Power factor (%)
Outdoor Unit model
Running current (A)
Power consumption (W)
Power factor (%)
Starting current (A)
COP
Operating noise Indoor Unit model
High (dB•A)
Medium (dB•A)
Low (dB•A)
Outdoor Unit model
10-1 indoor unit operating (dB•A)
13-1 indoor unit operating (dB•A)
2 indoor unit operating (dB•A)
Indoor unit Unit model
Dimension Height (mm)
Width (mm)
Depth (mm)
Net weight (kg)
Fan motor output (W)
Air flow rate (m3/h)
Outdoor unit Unit model
Dimension Height (mm)
Width (mm)
Depth (mm)
Net weight (kg)
Compressor Motor output (W)
Type
Model
Fan motor output (W)
Air flow rate (m3/h)
Piping connection Type
Indoor unit Unit model
Liquid side
Gas side
Outdoor unit Unit model
A unit liquid side/gas side
B unit liquid side/gas side
Maximum length (per unit) (m)
Maximum length (total) (m)
Maximum chargeless length (m)
Maximum height difference (m)
Refrigerant Name of refrigerant
Weight (kg)
Wiring connection Power supply
Interconnection
Usable temperature range Indoor (°C)
Outdoor (°C)
Accessory Indoor unit Installation plate
Wireless remote control
Label
Remote control holder
Pan head wood screw
Purifying filter
Deodorizing filter
Batteries
Mounting screw
Installation manual
Outdoor unit Installation manual
Owner's manual
RAS-M10YKCV-E, RAS-M13YKCV-E
RAS-M18YACV-E
5,2
1,4 – 6,2
220 – 230 – 240V – 1Ph – 50 Hz
RAS-M10YKCV-E RAS-M13YKCV-E
0,15 0,15
30 30
87 87
RAS-M18YACV-E
7,90 / 7,57 / 7,28
1660
95%
8,20 / 7,87 / 7,58
3,02
RAS-M10YKCV-E RAS-M13YKCV-E
36 39
33 35
30 30
RAS-M18YACV-E
42
46
46
RAS-M10YKCV-E RAS-M13YKCV-E
265 265
790 790
189 189
88
19 19
470 520
RAS-M18YACV-E
550
780
270
42
1100
Twin rotary type with DC-inverter variable speed control
DA130A1F-21F
40
2060
Flare connection
RAS-M10YKCV-E RAS-M13YKCV-E
Ø6,35 Ø6,35
Ø9,52 Ø9,52
RAS-M18YACV-E
Ø6,35 / Ø9,52
Ø6,35 / Ø9,52
20
30
30
10
R410A
1,15
3 Wires : includes earth
4 Wires : includes earth
21 – 32
21 – 43
1
1
2
1
2 (Ø3,1 x 16L)
1
1
2
6 (Ø4 x 25L)
1
1
1

– 5 –
1-2. Specifications of PerformanceWhen Each Indoor Unit is Combined with Other Unit
<Cooling>
Operating Unit capacity Cooling Running Power Outdoor
indoor unit (kW) capacity current consumption
operating noise
ABAB kW A W dB
10 — 2,7 — 2,7 4,13 770 42
(1,1 to 3,2) (1,65 to 4,99) (255 to 930)
13 — 3,7 — 3,7 6,58 1240 46
(1,1 to 4,2) (1,65 to 7,25) (255 to 1430)
10 10 2,55 2,55 5,1 8,14 1700 46
(1,4 to 6,1) (1,68 to 10,29) (260 to 2150)
13 10 3,01 2,19 5,2 8,20 1720 46
(1,4 to 6,2) (1,68 to 10,38) (260 to 2170)
10 — 2,7 — 2,7 3,95 770 42
(1,1 to 3,2) (1,59 to 4,78) (255 to 930)
13 — 3,7 — 3,7 6,30 1240 46
(1,1 to 4,2) (1,59 to 6,94) (255 to 1430)
10 10 2,55 2,55 5,1 7,78 1700 46
(1,4 to 6,1) (1,62 to 9,84) (260 to 2150)
13 10 3,01 2,19 5,2 7,87 1720 46
(1,4 to 6.2) (1,62 to 9,93) (260 to 2170)
10 — 2,7 — 2,7 3,79 770 42
(1,1 to 3,2) (1,52 to 4,58) (255 to 930)
13 — 3,7 — 3,7 6,03 1240 46
(1,1 to 4,2) (1,52 to 6,65) (255 to 1430)
10 10 2,55 2,55 5,1 7,46 1700 46
(1,4 to 6,1) (1,55 to 9,43) (260 to 2150)
13 10 3,01 2,19 5,2 7,58 1720 46
(1,4 to 6,2) (1,55 to 9,52) (260 to 2170)
Volts Operation
Vstatus
1 unit
220
2 units
1 unit
230
2 units
1 unit
240
2 units
<Heating>
• The above specification values are those under the conditions
Cooling indoor : DB/WB=27/19°C Cooling outdoor : DB=35°C
Heating indoor : DB=20°C Heating outdoor : DB/WB=7/6°C
Operating Unit capacity Heating Running Power Outdoor
indoor unit (kW) capacity current consumption operating noise
ABAB kW A W dB
10 — 4,0 — 4,0 6,94 1450 45
(0,7 to 5,2) (1,10 to 8,13) (170 to 1700)
13 — 5,0 — 5,0 9,86 2060 49
(0,7 to 6,5) (1,10 to 12,11) (170 to 2530)
10 10 3,2 3,2 6,4 8,47 1770 49
(0,9 to 8,3) (1,10 to 11,43) (170 to 2390)
13 10 3,72 2,98 6,7 8,85 1850 49
(0,9 to 8,7) (1,10 to 11,72) (170 to 2450)
10 — 4,0 — 4,0 6,64 1450 45
(0,7 to 5,2) (1,06 to 7,78) (170 to 1700)
13 — 5,0 — 5,0 9,43 2060 49
(0,7 to 6,5) (1,06 to 11,58) (170 to 2530)
10 10 3,2 3,2 6,4 8,10 1770 49
(0,9 to 8,3) (1,06 to 10,94) (170 to 2390)
13 10 3,72 2,98 6,7 8,47 1850 49
(0,9 to 8,7) (1,06 to 11,21) (170 to 2450)
10 — 4,0 — 4,0 6,36 1450 45
(0,7 to 5,2) (1,01 to 7,46) (170 to 1700)
13 — 5,0 — 5,0 9,04 2060 49
(0,7 to 6,5) (1,01 to 11,10) (170 to 2530)
10 10 3,2 3,2 6,4 7,76 1770 49
(0,9 to 8,3) (1,01 to 10,48) (170 to 2390)
13 10 3,72 2,98 6,7 8,11 1850 49
(0,9 to 8,7) (1,01 to 10,75) (170 to 2450)
Volts Operation
Vstatus
1 unit
220
2 units
1 unit
230
2 units
1 unit
240
2 units

– 6 –
1-2-2. Cooling Capacity Variation Ratio According toTemperature
1-2-1. Operation Characteristic Curve
<Cooling> <Heating>
* Capacity ratio : 100% = 5,2 kW
105115
110 100
105
100
95
90
85
0
95
90
85
80
75
70
65
60
55
5032 34 36 38 40 4233 35 37 39 41 4314 16 18 20 22 24
Outdoor temp. (˚C)Indoor air wet bulb temp. (˚C)
Capacity ratio (%) Capacity ratio (%)
• Conditions
Indoor : DB27˚C
Outdoor : DB35˚C
Indoor air flow : High
Pipe length 5m×2
2 units operating
• Conditions
Indoor : DB27˚C/WB19˚C
Indoor air flow : High
Pipe length 5m×2
2 units operating
Current Limited Start
10
9
8
7
6
5
4
3
2
1
0
Current (A)
12
10
8
6
4
2
0
Current (A)
10
Compressor speed (rps) Compressor speed (rps)
0 20 30 40 50 60 70 80 90 100 0 20 40 60 80 100 120 140
• Conditions
Indoor : DB 27˚C/WB 19˚C
Outdoor : DB 35˚C
Air flow : High
Pipe length : 5m x 2
2 units operating
230V
• Conditions
Indoor : DB 20˚C
Outdoor : DB 7˚C/WB 6˚C
Air flow : High
Pipe length : 5m x 2
2 units operating
230V

– 7 –
1-3. Electrical Data
<Cooling>
Combination
of indoor unit
operation
AB
10 —
13 —
10 10
13 10
System
Voltage range Power supply
Hz Volts- Min. Max. MCA ICF MOCP
Ph. (Amps)
5,81 5,81 15
50 230–1 198 264 8,51 8,51 15
12,10 12,10 15
12,21 12,21 15
Compressor Fan motor FLA
MSC RLA Indoor Outdoor
4,13 4,13 0,15 x 1=0,15 0,50
6,29 6,29 0,15 x 1=0,15 0,50
9,04 9,04 0,15 x 2=0,30 0,50
9,13 9,13 0,15 x 2=0,30 0,50
<Heating>
Combination
of indoor unit
operation
AB
10 —
13 —
10 10
13 10
System
Voltage range Power supply
Hz Volts- Min. Max. MCA ICF MOCP
Ph. (Amps)
9,56 9,56 15
50 230–1 198 264 14,31 14,31 15
13,47 13,47 15
13,81 13,81 15
Compressor Fan motor FLA
MSC RLA Indoor Outdoor
7,13 7,13 0,15 x 1=0,15 0,50
10,93 10,93 0,15 x 1=0,15 0,50
10,14 10,14 0,15 x 2=0,30 0,50
10,41 10,41 0,15 x 2=0,30 0,50
NOTE :
Model of Indoor unit :
10 :RAS-M10YKV-E, RAS-M10YKCV-E
13 :RAS-M13YKV-E, RAS-M13YKCV-E
MCA : Minimum Circuit Amps.
ICF : Maximum Instantaneous Current Flow
(Equivalent to MCA in case of inverter air conditioner)
MOCP : Maximum Overcurrent Protection (Fuse only)
MSC : Maximum Starting Current
FLA : Full Load Amps.
RLA : Rated Load Amps.RLA under conditions on the right.
<Cooling>
<Heating>
DB WB
Indoor temp. °C 20 —
Outdoor temp. °C 7 6
DB WB
Indoor temp. °C 27 19
Outdoor temp. °C 35 —

– 8 –
2. REFRIGERANT R410A
(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 level.
If the refrigerant gas leakage occurs and its
concentration exceeds the marginal level, 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.
2-2. Refrigerant Piping Installation
2-2-1. 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 must 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 discol-
ored 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 inTable 2-2-1.Never use copper
pipes thinner than 0,8 mm even when it is
available on the market.
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 refrigerat-
ing 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.
2-1. 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 materi-
als 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, pres-
sure in the refrigeration cycle becomes abnor-
mally 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 condi-
tioner using R410A as refrigerant.To prevent
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.

– 9 –
Table 2-2-1 Thicknesses of annealed copper pipes
Thickness (mm)
Nominal diameter Outer diameter (mm) R410A R22
1/4 6,35 0,80 0,80
3/8 9,52 0,80 0,80
1/2 12,70 0,80 0,80
5/8 15,88 1,00 1,00
Table 2-2-2 Minimum thicknesses of socket joints
Nominal diameter Reference outer diameter of Minimum joint thickness
copper pipe jointed (mm) (mm)
1/4 6,35 0,50
3/8 9,52 0,60
1/2 12,70 0,70
5/8 15,88 0,80
(2) Joints
For copper pipes, flare joints or socket joints are
used. Prior to use, be sure to remove all con-
taminants.
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 inTables 2-2-3 ~ 2-2-
6below.
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 socket joints are as shown in
Table2-2-2.
2-2-2. 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
other than lubricating oils used in the installed air
conditioner 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 may occur. Carefully
remove all burrs and clean the cut surface
before installation.

– 10 –
Table 2-2-5 Flare and flare nut dimensions for R410A
Dimension (mm)
ABCD
9,1 9,2 6,5 13 17
13,2 13,5 9,7 20 22
16,6 16,0 12,9 23 26
19,7 19,0 16,0 25 29
Nominal Outer diameter Thickness
diameter (mm) (mm)
1/4 6,35 0,8
3/8 9,52 0,8
1/2 12,70 0,8
5/8 15,88 1,0
Table 2-2-3 Dimensions related to flare processing for R410A
Nominal Outer Thickness
diameter
diameter (mm) (mm)
1/4 6,35 0,8
3/8 9,52 0,8
1/2 12,70 0,8
5/8 15,88 1,0
A (mm)
Flare tool for Conventional flare tool
R410A clutch type Clutch type Wing nut type
0 to 0,5 1,0 to 1,5 1,5 to 2,0
0 to 0,5 1,0 to 1,5 1,5 to 2,0
0 to 0,5 1,0 to 1,5 2,0 to 2,5
0 to 0,5 1,0 to 1,5 2,0 to 2,5
Table 2-2-4 Dimensions related to flare processing for R22
Nominal Outer Thickness
diameter
diameter (mm) (mm)
1/4 6,35 0,8
3/8 9,52 0,8
1/2 12,70 0,8
5/8 15,88 1,0
A (mm)
Flare tool for Conventional flare tool
R22 clutch type Clutch type Wing nut type
0 to 0,5 0,5 to 1,0 1,0 to 1,5
0 to 0,5 0,5 to 1,0 1,0 to 1,5
0 to 0,5 0,5 to 1,0 1,5 to 2,0
0 to 0,5 0,5 to 1,0 1,5 to 2,0
A
ØD
c) Insertion of Flare Nut
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 conven-
tional flare tool.
Fig. 2-2-1 Flare processing dimensions
Flare processing dimensions differ according
to the type of flare tool.When using a con-
ventional flare tool, be sure to secure“dimen-
sion A” by using a gauge for size adjustment.
Flare nut
width
(mm)

– 11 –
(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 choos-
ing the tightening torque, comply with values
designated by manufacturers.Table 2-2-7
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 2-2-7 Tightening torque of flare for R410A [Reference values]
Nominal Outer diameter Tightening torque Tightening torque of torque
wrenches available on the market
diameter (mm) N•m (kgf•cm) N•m (kgf•cm)
1/4 6,35 14 to 18 (140 to 180) 16 (160), 18 (180)
3/8 9,52 33 to 42 (330 to 420) 42 (420)
1/2 12,70 50 to 62 (500 to 620) 55 (550)
5/8 15,88 63 to 77 (630 to 770) 65 (650)
Fig. 2-2-2 Relations between flare nut and flare seal surface
Table 2-2-6 Flare and flare nut dimensions for R22
Nominal Outer diameter Thickness
diameter (mm) (mm)
1/4 6,35 0,8
3/8 9,52 0,8
1/2 12,70 0,8
5/8 15,88 1,0
3/4 19,05 1,0
Dimension (mm)
ABCD
9,0 9,2 6,5 13 17
13,0 13,5 9,7 20 22
16,2 16,0 12,9 20 24
19,4 19,0 16,0 23 27
23,3 24,0 19,2 34 36
43˚
~
45˚
45˚
~
46˚
B A CD
Flare nut
width
(mm)

– 12 –
2-3. Tools
2-3-1. RequiredTools
The service port diameter of packed valve of the outdoor unit in the air conditioner using R410A is changed to prevent
mixingof other refrigerant.Toreinforce the pressure-resisting strength, flare processingdimensions and opposite side
dimensionof flare nut(For Ø12,7 copperpipe) of therefrigerant 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 conventional refrigerant (R22)
The table below shows the tools exclusive for R410A and their interchangeability.
Also prepare the following equipments for other installation method and run check.
(1) Clamp meter
(2) Thermometer
(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 5mm)
(11) Tape measure
(12) Metal saw
(3) Insulation resistance tester
(4) Electroscope
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)
(3) Pipe cutter
Tools exclusive for R410A (The following tools for R410A are required.)
Tools whose specifications are changed for R410A and their interchangeability
(Note 1) 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.
(Note 2) Charging cylinder for R410A is being currently developed.
No. 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
Usage
Pipe flaring
Flaring by
conventional flare
tool
Connection of flare
nut
Evacuating, refriger-
ant charge, run
check, etc.
Vacuum evacuating
Refrigerant charge
Refrigerant charge
Gas leakage check
Refrigerant charge
R410A air conditioner
installation
Existence of Whether
new equipment conventional
for R410A equipment can
be used
Yes *(Note 1)
Yes *(Note 1)
Yes
X
Yes
X
Yes
X
Yes
X
Yes
X
Yes
X
(Note 2)
X
Conventional air
conditioner installation
Whether new equip-
ment can be used with
conventional refriger-
ant ¡
*(Note 1)
X
X
¡
¡
X
¡
X

– 13 –
2-4. Recharging of Refrigerant
When it is necessary to recharge refrigerant, charge the specified amount of new refrigerant according to the
following steps.
Fig. 2-4-1 Configuration of refrigerant charging
Never charge refrigerant exceeding the specified amount.
If the specified amount of refrigerant cannot be charged, charge refrigerant bit by bit in COOL mode.
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.
Connect the charge hose to packed valve service
port at the outdoor unit’s gas side.
Recover the refrigerant, and check no refrigerant
remains in the equipment.
(For refrigerant charging, see the figure below.)
Connect the charge hose of the vacuum pump
adapter.
Open fully both packed valves at liquid and gas
sides.
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.
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.
(INDOOR unit) (Liquid side)
Refrigerant cylinder
(With siphon pipe)
Check valve
(Gas side)
Open/Close valve
for charging
Electronic balance for refrigerant charging
Opened
(OUTDOOR unit)
Closed
Service port

– 14 –
Gauge manifold
[ Cylinder with siphon ] [ Cylinder without siphon ]
OUTDOOR unit Gauge manifold OUTDOOR unit
Refrigerant
cylinder
Electronic
balance
Refrigerant
cylinder
Electronic
balance
Siphon
Be sure to make setting so that liquid can be charged.
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.
Phosphor bronze brazing filler tends to react
with sulfur and produce a fragile compound
water solution, which may cause a gas leak-
age.Therefore, use any other type of brazing
filler at a hot spring resort, etc., and coat the
surface with a paint.
When performing brazing again at time of
servicing, use the same type of brazing filler.
Fig. 2-4-2
R410A refrigerant is HFC mixed refrigerant.
Therefore, if it is charged with gas, the compo-
sition of the charged refrigerant changes and
the characteristics of the equipment varies.
2-5. Brazing of Pipes
2-5-1. 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 expen-
sive though it excels in solderability.
(2) Phosphor bronze brazing filler
Phosphor bronze brazing filler is generally used
to join copper or copper alloy.
(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.
2-5-2. Flux
(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.

– 15 –
(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 oxide film removing
capability due to the addition of compounds
such as potassium fluoride, potassium chlo-
ride and sodium fluoride to the borax-boric
acid compound.
(4) Piping materials for brazing and used braz-
ing filler/flux
2-5-3. Brazing
As brazing work requires sophisticated techniques,
experiences based upon a theoretical knowledge, it
must be performed by a person qualified.
In order to prevent 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
Attach a reducing valve and a flow-meter to
the Nitrogen gas cylinder.
Use a copper pipe to direct the piping
material, and attach a flow-meter to the
cylinder.
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.
When the Nitrogen gas is flowing, be sure to
keep the piping end open.
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.
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).
Remove the flux completely after brazing.
Fig. 2-5-1 Prevention of oxidation during brazing
Piping
material
Copper - Copper
Copper - Iron
Iron - Iron
Used brazing Used
filler flux
Phosphor copper Do not use
Silver Paste flux
Silver Vapor flux
Do not enter flux into the refrigeration cycle.
When chlorine contained in the flux remains
within the pipe, the lubricating oil deterio-
rates.Therefore, use a flux which does not
contain chlorine.
When adding water to the flux, use water
which does not contain chlorine (e.g.distilled
water or ion-exchange water).
Remove the flux after brazing.
Nitrogen gas
cylinder
Pipe
Flow meter
M
Stop valve
From Nitrogen cylinder
Nitrogen
gas
Rubber plug

– 16 –
3. CONSTRUCTION VIEWS
3-1. Indoor Unit
RAS-M10YKV-E, RAS-M13YKV-E
RAS-M10YKCV-E, RAS-M13YKCV-E
Wireless
remote control
Installation
plate outline 55 16
136
47
50 94
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Air filter 790 Heat exchanger Air inlet
265
Air outlet 47
10 50
189
Knock out system
47
10 50
790
Knock out system
Front panel
Back body
232 326 232
Hanger
321 Drain hose (0,54m)
Connecting pipe (0,39m)
External
length reference (Flare ø6,35)(Flare ø9,52) Hanger Connecting pipe (0,49m)
65965,5
344
326
450 65,5
For stud bolt
(ø8~ø10)
For stud bolt
(ø6)
Hanger
Minimum
distance to wall
Minimum
distance
to ceiling
265
178,5
20 20
37
40,5
60,5
790 126269319
10,5 76 Center line
Hanger
Hanger
3,5
37
Hanger
Minimum
distance
to wall
17 20
26
46
120 or more 120 or more
66 or more
2,5

– 17 –
3-2. Outdoor Unit
RAS-M18YAV-E
RAS-M18YACV-E
Connecting pipe port
(Pipe dia.ø6,35)
Connecting pipe port
(Pipe dia.ø9,52)
ø25 drain hole (For ø8-ø10 anchor bolt)
ø11 × 17U-shape hole
8-ø6 hole
(For fixing outdoor unit)
ø11 × 17 long hole
(For ø8-ø10 anchor bolt)
90
50
600
310 296 270
76
115
115,5
8540
550
16
14749,5
780 61 122,8 332
96,2
53 53 53
21
59
157
21
Z
ø4,5 embossing (ø4STS used)
(For sunshade roof attaching)
Fan guard Valve cover
Earth terminal
B leg part
Hanger
(ø6 hole pitch)
(Anchor bolt long hole pitch)
A leg part
view
Z
Charging
port
2-ø6 hole
2-ø6 hole
600
50
11 R15
36
310 296
600
50
11
R15
36
310 296
R5,5
R5,5
Detailed A leg part
Detailed B leg part
Outside line
of product
Outside line
of product
600
310
B
C
A
D
4 × ø11 × 17U-shape hole
(For ø8-ø10 anchor bolt)
Mounting dimensions of anchor bolt
50 or more
Intake
Intake
100 or
more
250 or more
200 or more
(Minimum distance
from wall)
Outside line
of product
Outlet 4 × ø11 × 17 long hole
(For ø8-ø10 anchor bolt)

– 18 –
4. WIRING DIAGRAM
4-1. Indoor Unit
RAS-M10YKV-E, RAS-M13YKV-E
RAS-M10YKCV-E, RAS-M13YKCV-E
Table 4-1-1 Simple check points for diagnosing faults
Check items
OPERATION
indicator
Terminal
block
Fuse
6,3A
DC 5V
DC 12V
DC 35V
Diagnosis result
Check to see if the OPERATION indicator goes on and off when the main
switch or breaker is turned on, or the power cord is plugged in the wall
outlet. (Check the primary and secondary voltage of transformer.)
Check for power supply voltage between – . (Refer to the name
plate.) (Check the primary and secondary voltage of transformer.)
Check for fluctuate voltage between – . (DC 15 to 60V)
Check to determine if the fuse is open.
(Check Varistor : R109, R21)
Check for voltage at the pink lead of the infrared rays receive parts.
(Check the transformer and the rated voltage power supply circuit.)
Check for voltage at the  lead of louver motor.
(Check the transformer and the rated voltage power supply circuit.)
Check for voltage at the CN10 connector side point.
(Check the transformer and the rated voltage power supply circuit.)
MAIN P.C. BOARD
(MCC-772)
BLK
P04
CN30
CN23
INDOOR
TERMINAL
BLOCK
INDOOR
UNIT
OUTDOOR
UNIT
CN07 CN10
TO1 DC35V
DC12V
DC7V
DC0V
C06
C02
IC04
R116
C15
R21
J04
F01 FUSE
T6,3A 250V
R109
VARISTOR
SG01 DSA L01
C01
R01
DB01
HEAT
EXCHANGER
SENSOR
(TC)
IC
IC01 CN01
IC02
21 21
BLK BLK
THERMO
SENSOR
(TA)
CN03
CN13
CN25
INFRARED RAYS RECEIVE
AND INDICATION PARTS
21 21
BLK
1
1
2
3
BLK
WHI
GRN &YEL
RED
1
1
BLU
BLK
2
2
2
BLU
3
3
3
BLU
4
4
4
BLU
5
5
5
BLU
6
6
6
BLU
7
7
7
PNK
8
8
8
BLK
9
9
9
WHI
6 5 4 3 2 1
6 5 4 3 2 1 4 3 2
FAN MOTOR
LOUVER
MOTOR
4
5
53 2 1
1
BLU PNK YEL ORN RED BRW
DC MOTOR
2
4
1
3
65
BROWNBRW :
COLOR
IDENTIFICATION
REDRED : WHITEWHI : YELLOWYEL : BLUEBLU : BLACKBLK : GRAYGRY : PINKPNK : ORANGEORN : GREEN &
YELLOW
GRN
&YEL :
For detailed diagnostic procedure, refer to the service data.
DSA : Surge Absorber

– 19 –
4-2. Outdoor Unit
RAS-M18YAV-E
COLOR IDENTIFICATION
P.M.V. : PULSE MODULATING VALVE
BLK : BLACK
BLU : BLUE
ORN : ORANGE
GRY : GRAY
PNK : PINK
WHI :WHITE
BRW : BROWN
RED : RED
YEL :YELLOW
PUR : PURPLE
SKB : SKY-BLUE
CN08
WHI
P.M.V.
A UNIT
POWER
SUPPLY
220–230–240V~
50/60Hz
SURGE
ABSORBER
CN300
FAN MOTOR
P.C. BOARD
MCC-758
REACTOR
4 way
valve
CN301
CN701
RELAY
RY04
CT
CONVERTER
MODULE
IGBT MODULE
ELECTRONIC
STARTER
POWER RELAY
G
E
A
~
–
~
+
+
BU
EU
BV
EV
BW
EW
BX
BY
BZ
–
C15C13
C14C12
P07P08
ORN P10
YEL
DB01
P20
BLU
Q200
P18
P17
P19
P09
P06
F01
FUSE
25A
VARISTOR
L03
To
INDOOR
UNIT
A
To
INDOOR
UNIT
B
TD
WHI
YEL
ORN
BLU
RED
GRY
P.M.V.
B UNIT
WHI
YEL
ORN
BLU
RED
GRY
ORN
REACTOR
WHI
CN501
P12
P13
P11
P14
YEL
YEL
PUR
CN704
BLKBLK
PNK YEL RED WHI BLK GRY
P04
RED P05
WHI
BRW
RED
ORN
YEL
BLK
BRW
RED
ORN
YEL
P06
CN15
P02
GRY P01
L
321 321 123 123 4
4
5
5
1
1
2
2
3
32
2
1
1
N 123 123
~~~ ~~~~ ~~~~
1 1
2 2
CN02
WHI
CN03
WHI
CN04
BLK
CN05
YEL
CN14
CN13
1 1
2 2
3 3
1 1
2 2
1 1
2 2
1 1
2 2
3 3
6 6
5 5
4 4
3 3
2 2
1 1
6 6
5 5
4 4
3 3
2 2
1 1
THERMOSTAT for COMPRESSOR
PHOTO
COUPLER
F03
FUSE
15A
F04
FUSE
3,15A
F01
FUSE 6,3A
3
1
3
1
4
3
2
1
4
3
2
1
4
3
2
1
TO
TE
CN01
WHI
1 1
2 2
TS
YEL
BLK
TGa
3
2
1
3
2
1
RELAY
RY06
BLKP23 WHI COMPRESSOR
P22 REDP21
CM
FM
SUB
P.C. BOARD
MCC-775
REACTOR
11
22
L01

– 20 –
RAS-M18YACV-E
COLOR IDENTIFICATION
P.M.V. : PULSE MODULATING VALVE
BLK : BLACK
BLU : BLUE
ORN : ORANGE
GRY : GRAY
PNK : PINK
WHI :WHITE
BRW : BROWN
RED : RED
YEL :YELLOW
PUR : PURPLE
SKB : SKY-BLUE
CN08
WHI
P.M.V.
A UNIT
POWER
SUPPLY
220–230–240V~
50/60Hz
SURGE
ABSORBER
CN300
FAN MOTOR
P.C. BOARD
MCC-758
REACTOR
CN301
CT
CONVERTER
MODULE
IGBT MODULE
ELECTRONIC
STARTER
POWER RELAY
G
E
A
~
–
~
+
+
BU
EU
BV
EV
BW
EW
BX
BY
BZ
–
C15C13
C14C12
P07P08
ORN P10
YEL
DB01
P20
BLU
Q200
P18
P17
P19
P09
P06
F01
FUSE
25A
VARISTOR
L03
To
INDOOR
UNIT
A
To
INDOOR
UNIT
B
TD
WHI
YEL
ORN
BLU
RED
GRY
P.M.V.
B UNIT
WHI
YEL
ORN
BLU
RED
GRY
ORN
REACTOR
WHI
CN501
P12
P13
P11
P14
YEL
YEL
PUR
CN704
BLKBLK
PNK YEL RED WHI BLK GRY
P04
RED P05
WHI
BRW
RED
ORN
YEL
BLK
BRW
RED
ORN
YEL
P06
CN15
P02
GRY P01
L
321 321 123 123 4
4
5
5
2
2
1
1
N 123 123
~~~ ~~~~ ~~~~
1 1
2 2
CN02
WHI
CN03
WHI
CN04
BLK
CN05
YEL
CN14
CN13
1 1
2 2
3 3
1 1
2 2
1 1
2 2
1 1
2 2
3 3
6 6
5 5
4 4
3 3
2 2
1 1
6 6
5 5
4 4
3 3
2 2
1 1
THERMOSTAT for COMPRESSOR
PHOTO
COUPLER
F03
FUSE
15A
F04
FUSE
3,15A
F01
FUSE 6,3A
3
1
3
1
4
3
2
1
4
3
2
1
4
3
2
1TO
TS
YEL
BLK
TGa
3
2
1
3
2
1
BLKP23 WHI COMPRESSOR
P22 REDP21 CM
FM
SUB
P.C. BOARD
MCC-775
REACTOR
11
22
RELAY
RY06
CN701
123
L01