Toshiba RAS-18NKHP-E User manual

FILE NO. SVM-06004
SERVICE MANUAL
AIR CONDITIONER
SPLIT WALL TYPE
RAS-18NKHP-E / RAS-18NAH-E
RAS-18NKP-E / RAS-18NA-E
RAS-24NKP-E / RAS-24NA-E
RAS-B18NKPX / RAS-18N2AX
RAS-24NKPX / RAS-24N2AX
24 Class18 Class
May, 2006

–1–
FILE NO. SVM-06004
CONTENTS
1. SPECIFICATIONS
2. CONSTRUCTION VIEWS
2-1 Indoor Unit
2-2 Outdoor Unit (24 Class)
2-3 Outdoor Unit (18 Class)
3. WIRING DIAGRAM
3-1
3-2
RAS-18NKHP-E/ RAS-18NAH-E
3-3
RAS-24NKP-E / RAS-24NA-E, RAS-24NKPX / RAS-24N2AX
RAS-18NKP-E/ RAS-18NA-E, RAS-18NKPX / RAS-18N2AX
4. SPECIFICATION OF ELECTRICAL PARTS
4-1 Indoor Unit
(RAS-18NKHP-E)
4-2 Outdoor Unit (RAS-18NAH-E)
4-3 Indoor Unit (RAS-24NKP-E, RAS-24NKPX,
4-4 Outdoor Unit (RAS-24NA-E, RAS-24N2AX)
4-5 Outdoor Unit (RAS-18NA-E, RAS-18N2AX)
5. REFRIGERATION CYCLE DIAGRAM
5-1
5-2
RAS-18NKHP-E/ RAS-18NAH-E
5-3
RAS-24NKP-E / RAS-24NA-E,
5-4
RAS-18NKP-E/ RAS-18NA-E
RAS-B18NKPX / RAS-18N2AX
6. CONTROL BLOCK DIAGRAM
6-1 RAS-18NKHP-E
6-2 RAS-18NKP-E / RAS-18NA-E, RAS-B18NKPX / RAS-18N2AX
RAS-24NKP-E / RAS-24NA-E, RAS-24NKPX, RAS-24N2AX
RAS-18NKP-E, RAS-18NKPX)
RAS-24NKPX / RAS-24N2AX
7-10 QUIET Mode
7. OPERA
7-11 COMFORT SLEEP mode
TION DESCRIPTION
7-1 Outline of Air Conditioner Control
7-2 Description of Operation Circuit
7-3 Hi POWER Mode
7-4 High-Temperature Limit Control
7-5 Low-Temperature Limit Control
7-6 Defrosting Operation
7-7 Auto Restart Function
7-8 Filter Check Lamp
7-9 Self-Cleaning function

−2 −
FILE NO. SVM-06004
8. INSTALLATION PROCEDURE
8-1 Safety Cautions
8-2 Installation Diagram of Indoor and Outdoor Units
8-3 Installation
8-4 Indoor Unit
8-5 Outdoor Unit
8-6 How to Set Remote Control Selector Switch
8-7 Others
9. TROUBLESHOOTING CHART
9-1 Troubleshooting Procedure
9-2 Basic Check Items
9-3 Primary Judgement
9-4 Self-Diagnosis by Remote Control (Check Code)
9-5 How to Diagnose Faulty Part
9-6 Troubleshooting for Indoor Unit
9-7 Troubleshooting for Wiring (Interconnect cable and Serial Signal Wire)
9-8 Troubleshooting for P.C. Board
9-9 Troubleshooting for Remote Control
10. PARTS REPLACEMENT
10-1 Indoor Unit
10-2 Outdoor Unit (RAS-24NA-E, RAS-24N2AX)
10-3 Outdoor Unit (RAS-18NAH-E, RAS-18NA-E, RAS-18N2AX)
11. EXPLODED VIEWS AND PARTS LIST
11-1 Indoor Unit (E - Parts Assy)
11-2 Indoor Unit
11-3 Outdoor Unit
11-4 Outdoor Unit (RAS-24NA-E, RAS-24N2AX)
(RAS-18NAH-E)
11-5 Outdoor Unit (RAS-18NA-E, RAS-18N2AX)

– 3 –
FILE NO. SVM-06004
MODEL RAS-24NKP-E RAS-24NKPX
RAS-24N2AX
ITEM Cooling Cooling
Capacity kW
220 V 240 V 220 V 240 V
6.40 6.45 6.40 6.45
Phase 1∅
Power source V220 – 240
Hz 50
Power consumption W2350 2440 2350 2440
Power factor %99909990
Running current A0.3/10.5 0.3/11.00.3/10.50 0.3/11.0
Indoor/Outdoor
Starting current A
Moisture removal lit/h
Noise
Indoor (H/M/L) dB 45/43/41/39/37
Outdoor (220 – 240 V) dB 56-57
Refrigerant Name of refrigerant R22
Rated amount kg
Refrigerant control Capillary tube
Gas side size mm ∅15.88
Connection type Flare connection
Liquid side size mm ∅6.35
Interconnection Connection type Flare connection
pipe Maximum length m 15*1
(One way)
Maximum height m10
difference
INDOOR UNIT RAS-24NKP-E RAS-24NKPX
Height mm 298
Dimensions Width mm 998
Depth mm220
Net weight kg 13
Evaporator type Finned tube
Indoor fan type Cross flow fan
High fan m3/h 900
Air volume Medium fan m3/h
Low fan m3/h
Fan motor output W
Air filter Honeycomb woven filter with PP frame
OUTDOOR UNIT RAS-24NA-E RAS-24N2AX
Height mm 715
Dimensions Width mm780
Depth mm290
Netweight kg52
Condenser type Finned tube
Outdoor fan type Propeller fan
Airflow volume m3/h 2600 2400 2600
Fan motor output W42
Compressor Model
Output W1800
Safety device IOL
Louver type Automatic louver
Usable outdoor temperature range °C 21 ~ 43
1. SPECIFICATIONS
RAS-24NA-E
1.68
2400
PH400X3CS-4KT1
2.7
750
625
30
25*2
67

– 4 –
FILE NO. SVM-06004
MODEL RAS-18NKHP-E RAS-18NKP-E RAS-B18NKPX
RAS-18NAH-E RAS-18NA-E RAS-18N2AX
ITEM Cooling Heating Cooling Cooling
Capacity kW
220 V 240 V220 V 240 V 220 V 240 V 220 V 240 V
5.05 5.05 5.80 5.90 5.20 5.25 5.20 5.25
Phase 1∅
Power source V220 – 240
Hz 50
Power consumption W 1920 2040 1800 1950 1910 1990 1910 1990
Power factor %9588948692859285
Running current A0.2/9.150.2/9.40 0.3/9.150.3/9.40
Indoor/Outdoor 8.99.48.49.2
Starting current A42
Moisture removal lit/h 2
Noise Indoor (H/M/L) dB
Outdoor (220 – 240 V) dB 52-53 53-54 51 52 51 52
Refrigerant Name of refrigerant R22
Rated amount kg 1.00
Refrigerant control Capillary tube
Gas side size mm ∅12.7
Connection type Flare connection
Liquid side size mm ∅6.35
Interconnection Connection type Flare connection
pipe Maximum length m15*1
(One way) 20*2
Maximum height m8
difference
INDOOR UNIT RAS-18NKHP-E RAS-18NKP-E RAS-B18NKPX
Height mm 298
Dimensions Width mm 998
Depth mm220
Net weight kg 13
Evaporator type Finned tube
Indoor fan type Cross flow fan
High fan m3/h 900900 900
Air volume Medium fan m3/h 650 700 650
Low fan m3/h 530 570 530
Fan motor output W30
Air filter Honeycomb woven filter with PP frame
OUTDOOR UNIT RAS-18NAH-E RAS-18NA-E RAS-18N2AX
Height mm 550
Dimensions Width mm780
Depth mm290
Net weight kg 43 41
Condenser type Finned tube
Outdoor fan type Propeller fan
Airflow volume m3/h
Fan motor output W42
Compressor Model
Output W
Safety device IOL, Td Sensor IOL
Louver type Automatic louver
Usable outdoor temperature range °C 15 ~ 43 –10 ~ 24 21 ~ 43
PH340X3C-4KT1
45
44/42/39/37/35
Note *1 Chargeless pipe
*2 Maximum pipe
2350
2350 2550
0.3
0.3 0.3 0.3
44/42/39/37/35
1.53
550
780
290
2550
2350
1500
2550

– 5 –
FILE NO. SVM-06004
Note : 1
•Capacity is based on the following temperature conditions.
Note : 2
•Charge refrigerant according to the table below.
RAS-18NKHP-E / RAS-18NAH-E
RAS-24NKP-E / RAS-24NA-E RAS-18NKP-E / RAS-18NA-E
Refrigerant RAS-24NKPX / RAS-24N2AX RAS-B18NKPX / RAS-18N2AX
*1 No need to charge 15 m or less 15 m or less
extra refrigerant
*2 Need to charge Over 15 m up to 25 m (30 g/m) Over 15 m up to 20 m (20 g/m)
extra refrigerant
Temperature Condition JIS B8615-1
Cooling Heating
Indoor unit inlet air temperature (DB) 27°C 20°C
(WB) 19°C 15°C
Outdoor unit inlet air temperature (DB) 35°C 7°C
(WB) 24°C 6°C

CONSTRUCTIONVIEWS
Air outlet
Plasma air purifierHeat exchangerAir filter
Air inlet
998
220
50
75
8
Knock out system
75 56
50
58 19
163
Wireless remote control
Connection pipe (0.49 m)
(Flare ∅6.35)
Drain hose (0.54 m)
90 or more
Minimum distance to ceiling
100
40
48
450
20
20
48
100
∅
65
998
298
10
763.5
5555 55 41
29
∅
65
(For stud bolt ∅ 6)
(For stud bolt ∅ 8 − ∅ 10)
Installation
Plate outline
Outline of indoor unit
Connection pipe (0.39 m)
(For 24 series and RAS-18NKDX4-T2 : Flare ∅15.88)
(For 18 series except RAS-18NKDX4-T2 : Flare ∅12.7)
Back body
Front panel
Grille inlet
298
75
7
51
Knock out system
2-1. Indoor Unit
−6 −
FILE NO. SVM-06004

HANDLE
COVER-PV
HANDLE
600
Z View Service port
321
307
A Detail Drawing (Back leg)
Ø
25 Drain outlet
2Ø11x14 Hole
(For Ø8-Ø10 anchor bolt) B
Ø6Hole
Ø11x14 Hole
50
36 R15
R
5.5
Ø6 hole
28
321
86
A
124109
600 or more
Air out
let
321
600
Air inlet
4xØ11 Long holes(For Ø8- Ø10 anchor bolt)
Gas-side
(Flare Ø15.88)
Liquid side
(Flare Ø6.35)
90 600 90 69 342
321
Z
50
36 R15
B Detail Drawing (Front leg)
Ø436
FAN-GUARD
715
290
275
600 or more
84
129
54
Electrical part cover
321
307
100 or more
100 or more
Installation dimension
2-2. Outdoor Unit (24 Class)
−7 −
FILE NO. SVM-06004

321
307
Z View
600
A detail Drawing (Back leg)
321
307
Ø 25 Drain outlet 11 x 14 Hole
(For 8 - 10 anchor bolt)
B Detail Drawing (Front leg)
FAN-GUARD
COVER-PV
Electrical part cover
Liquid side
(Flare 6.35)
Ø
Ø
Gas side
(Flare 12.7)
Service port
4x 11 Long holes(For 8- 10 anchor bolt)
Installation dimension
Air outlel
100 or more
100 or more
600 or more
600 or more
Air intlel
ØØØ
Ø6 hole
86
Ø6 hole
Ø11x14 hole
R
15
28
A
321
R5.5
36
109 124
50
129
84
54
600
321
9060090
275
290
550
Ø436
Z
R15
50
36
-
2
321
342
69
ØØØ
2-3. Outdoor Unit(18 Class)
−8 −
FILE NO. SVM-06004

DISCHARGE
PIPE
SENSOR (TD)
HEAT
EXCHANGER
SENSOR (TE)
CN08
CN07 BLU
BLU
BLK
BLK
11
2
33
11
2
33
i
LN3
12
i
FERRITE CORE
GRN&YEL
RED
RED
BLK
BLK
MAGNETIC
CONTACTOR
RA1
A2
52C
U
S
V
T
W
PNK
WHI
COMPRESSOR TERMINAL
BLK
S
R
CWHI BLK BLK
COIL FOR
4 WAY VALVE
RED
RED
RED
CAPACITOR CAPACITOR
BLK
BLK
WHI
RED CN01
CN05
GRY
1
3
5
7
9
1
3
5
7
9
GRN&YEL
CHASSIS
TRANSFORMER
BLK
BLK
RED
RED
11
33
11
33
2
CN11
BLU
YEL
1
3
1
3
1
13
CN02
BLU
BLU
11
33
CN03
F01
250VAC T6. 3A
CR11
CR12
CR13
RY07
RY05
RY06
SG01
CN06
TNR
R74
TNR
R73
MAIN P.C. BOARD (MCC-890)
FILE NO. SVM-06004
3
12
POWER SUPPLY
220-240V~ 50Hz
INDOOR
TERMINAL
BLOCK
OUTDOOR
TERMINAL
BLOCK
INDOOR
UNIT
OUTDOOR
UNIT
10
10
98
7
1 2 3 4 65 10
Infrared rays receive
5 64 CN13 321 78 9
9871 2 3 CN25
P04BLK
4 6
WHI
5
250V6.3A
F01
DSA Varistor
motor
Louver
BLU
ORN
5
5 2
23
3
1
1
RED YEL
CN07
PNK
4
4
98 1071 2 3
and Indication parts
4 65
YEL
GRY
BRW
TEMP FUSE
145 C
6
6
5
5
4
4
13
2
13
2
+5 VDC
+12 VDC
Serial Signal
circuit
MAIN P.C. BOARD
(WP-003)
CN23
CN31
CN30
BRW
6
6
BLU BLU BLU BLU BLU BLU BLU BLU BLU
WP-003
COMPRESSOR FAN MOTOR
3-1.RAS-18NKHP-E / RAS-18NAH-E
–9 –
BRW : BROWN
RED : RED
WHI : WHITE
YEL : YELLOW
BLU : BLUE
BLK : BLACK
GRY : GRAY
ORN : ORANGE
GRN : GREEN
GRN&YEL : GREEN & YELLOW
COLOR IDENTIFICATION
PNK : PINK
R
S
C
3. WIRING DIAGRAM

–10 –
FILE NO. SVM-06004
3-2.RAS-24NKP-E / RAS-24NA-E
i
LN3
12
i
GRN&YEL
RED
RED
RED
RED
BLK
BLK CHASSIS
GRY
POWER SUPPLY
220-240 V ~ 50 Hz
SPARK KILLER
MAGNETIC CONTACTOR
BLK BLK
RED
A2 A1
52C
1/L1 2/T1
3/L2 4/T2
5/L3 6/T3
COMPRESSOR
WHI
PNK BLK
C
S
R
CAPACITOR
CAPACITOR
WHI
RED
F AN MO T OR
B L K
C O MP R E S S O R T E R MINAL
R
S
C
3
12
INDOOR
TERMINAL
BLOCK
OUTDOOR
TERMINAL
BLOCK
INDOOR
UNIT
OUTDOOR
UNIT
105 64321 78 9
5 98
7
1 2 3 4 6 10
YEL
GRY
BRW
TEMP FUSE
145 C
6
6
5
5
4
4
13
2
13
2
Control
Fan motor
circuit
Power supply
circuit
(TC)
sensor
Heat exchanger
(TA)
sensor
Thermo.
1
12
CN03
BLK
2
BLK
BLK
2
BLK
CN01
21
1
MAIN P.C. BOARD
(WP-003)
CN27
CN31
BRW
6
6
BLU BLU BLU BLU BLU BLU BLU BLU BLU
10
98
7
1 2 3 4 65 10
and Indication parts
5 64
CN13
321 78 9
CN25
P04
GRN&YEL
BLK
WHI
Varistor
250V
6.3A
DSA Varistor
motor
Louver
BLU
ORN
5
5 2
23
3
1
1
RED
YEL
CN07
PNK
4
4
F01
Infrared rays receive
CN30
RAS-24NKPX / RAS-24N2AX
BRW : BROWN
RED : RED
WHI : WHITE
YEL : YELLOW
BLU : BLUE
BLK : BLACK
GRY : GRAY
ORN : ORANGE
GRN : GREEN
GRN&YEL : GREEN & YELLOW
COLOR IDENTIFICATION
PNK : PINK

–11 –
FILE NO. SVM-06004
3-3.RAS-18NKP-E / RAS-18NA-E, RAS-18NKPX / RAS-18N2AX
i
LN3
12
i
GRN&YEL
RED
RED
GRY
RED
BLK
BLK
BLK
BLK
GRN&YEL
CHASSIS
MAGNETIC
CONTACTOR
A1
A2
UVW
RST
SPARK KILLER
FAN MOTOR
WHI BLK
RED
RED
CAPACITOR
WHI BLK
PNK
S
R
C
(or A)
(or B)
105 64321 78 9
5 98
7
1 2 3 4 6 10
YEL
GRY
BRW
TEMP FUSE
145 C
6
6
5
5
4
4
13
2
13
2
Control
Fan motor
circuit
Power supply
circuit
(TC)
sensor
Heat exchanger
(TA)
sensor
Thermo.
1
12
CN03
BLK
2
BLK
BLK
2
BLK
CN01
21
1
MAIN P.C. BOARD
(WP-003)
CN27
CN31
BRW
6
6
BLU BLU BLU BLU BLU BLU BLU BLU BLU
10
98
7
1 2 3 4 65 10
and Indication parts
5 64
CN13
321 78 9
CN25
P04
GRN&YEL
BLK
WHI
Varistor
250V
6.3A
F01
DSA Varistor
motor
Louver
BLU
ORN
5
5 2
23
3
1
1
RED
YEL
CN07
PNK
4
4
Infrared rays receive
CN30
3
12
CAPACITOR
COMPRESSOR
RED
INDOOR
TERMINAL
BLOCK
OUTDOOR
TERMINAL
BLOCK
INDOOR
UNIT
OUTDOOR
UNIT
COMPRESSOR TERMINAL
BRW : BROWN
RED : RED
WHI : WHITE
YEL : YELLOW
BLU : BLUE
BLK : BLACK
GRY : GRAY
ORN : ORANGE
GRN : GREEN
GRN&YEL : GREEN & YELLOW
COLOR IDENTIFICATION
PNK : PINK
R
S
C
POWER SUPPLY
220-240V ~ 50Hz

4-2. Outdoor Unit (RAS-18NAH-E )
No. Parts name Type Specifications
Output (Rated) 1500 W, 2 poles, 1 phase, 220 – 240 V, 50 Hz
1Compressor PH340X3C-4KT1 Winding resistance (Ω)C-R C-S
(at 20°C) 1.46 2.47
Output (Rated) 42 W, 4poles, 1 phase, 220 – 240 V, 50 Hz
2Fan motor (for outdoor) FG-240-42A-1 Winding resistance (Ω)Red-BlackWhite-Black
(at 20°C) 128 126
3Running capacitor 451305L AC 450 V, 3.0µF
(for fan motor)
4Running capacitor RS44B506U0218S AC 440 V, 50µF
(for compressor)
5Solenoid coil VHV (STF) AC 220 – 240 V
(for 4-way valve)
6 Thermo sensor TE / TD 10 kΩat 25°C / 50 kΩat 25°C
7Magnetic contactor CLK-26J 220 −240 V, 50 Hz
8 Transformer TT-05 220 – 240 V
9 Microcontroller TMP47C840N
10 Varistor (R73, R74, R86) 15G471K 470 V
11 Fuse (F01) MT3 T6.3 A, 250 V
4. SPECIFICATION OF ELECTRICAL PARTS
FILENO.SVM-06004
4-1. Indoor Unit (RAS-18NKHP-E)
No. Parts name Type Specifications
1Fan motor (for indoor) AFS-220-31A AC 200 − 240V, 31W
2 Thermo sensor (TA-sensor) ——— 10 kΩat 25°C
3Micro Power Module (M01) µRM1260V DC 390 V, Secondary DC 12 V, 5V
4 Microcontroller TMP87CM40AN
5 Heat exchanger sensor ——— 10 kΩat 25°C
(TC-sensor)
6Line filter (L01) LC*SS11V-06270 27mH, 600mA
7 Diode (DB01) D3SBA60 4 A, 600 V
8Capacitor (C63)KMH400VSSN47M22S 4.7µF, 400 V
9Fuse (F01) BET6.3A T6.3 A, 250 V
10Varistor (R21, R22) 15G561K 560 V
11 Resistor (R319) RF-2TK5R6 5.6Ω, 2 W
12 Louver motor MP35EA12 Output (Rated) 2 W, 10 poles, 1 phase,
DC 12 V
–12 –

FILE NO. SVM-06004
−13 −
4-4.
4-5.Outdoor Unit (RAS-18NA-E, RAS-18N2AX)
Outdoor Unit (RAS-24NA-E, RAS-24N2AX)
No. Parts name Type Specifications
Output (Rated) 1500 W, 2 poles, 1 phase, 220 – 240 V, 50 Hz
1Compressor PH340X3C-4KT1 Winding resistance (Ω)C-R C-S
(at 20°C) 1.46 2.47
Output (Rated) 42 W, 6 poles, 1 phase, 220 – 240 V, 50 Hz
No. Parts name Type Specifications
Output (Rated) 2200 W, 2 poles, 1 phase, 220 −240V, 50 Hz
1Compressor PH400X3CS-4KT1 Winding resistance (Ω)C-R C-S
(at 20 °C)
Output (Rated) 42 W, 4poles, 1 phase, 220 −240V, 50 Hz
Winding resistance (Ω)Red-BlackWhite-Black
2 Fan motor (for outdoor)
(at 20°C)
128 126
FG-240-42A
AC 440 V,50µF

3Running capacitor 451305L AC 450 V, 3.0µF
(for fan motor)
RS44B506U0218S
4
5Magnetic contactor A35 220 −240 V, 50 Hz
Running capacitor
(for compressor)
1.13 2.10
2Fan motor (for outdoor) WLF-240-42A-1 Winding resistance (Ω)Red-BlackWhite-Black
(at 20°C) 188 289
3Running capacitor 451205L AC 450 V, 2.0µF
(for fan motor)
4Running capacitor RS44B506U0218S AC 440 V, 50µF
(for compressor)
5 Magnetic contactor CLK-26J 220 – 240 V, 50 Hz
4-3. Indoor Unit (RAS-24NKP-E, RAS-24NKPX,
RAS-18NKP-E, RAS-18NKPX)
No. Parts name Type Specifications
1Fan motor (for indoor) AFS-220-31A AC 200 − 240V, 31W
2 Thermo sensor (TA-sensor) ——— 10 kΩat 25°C
3Micro Power Module (M01) µRM1260V DC 390 V, Secondary DC 12 V, 5V
4 Microcontroller TMP87CM40AN
5 Heat exchanger sensor ——— 10 kΩat 25°C
(TC-sensor)
6Line filter (L01) LC*SS11V-06270 27mH, 600mA
7 Diode (DB01) D3SBA60 4 A, 600 V
8Capacitor (C63)KMH400VSSN47M22S 4.7µF, 400 V
9Fuse (F01) BET6.3A T6.3 A, 250 V
10Varistor (R21, R22) 15G561K 560 V
11 Resistor (R319) RF-2TK5R6 5.6Ω, 2 W
12 Louver motor MP35EA12 Output (Rated) 2 W, 10 poles, 1 phase,
DC 12 V
13Relay : (RY04) G5NB-1A Coil DC 12V, 16.7mA, Contact AC 250V, 1A

–14 –
Evaporator
Indoor unit
Cross flow fan
Cooling Heating
4-way valve
Heating Cooling Compressor
Condenser
Propeller fan
Outdoor unit
2JS350D5A02
Accumulator
Cooling
Heating
O.D.:12.7 mm O.D.:6.35 mm
Cooling
Heating
Gas container connection (Reinstall etc.)
Packed valve
(
∅ 6.35)
Packed valve
( ∅ 12.7)
0.39 m
(Connecting pipe)
∅ 12.7
0.49 m
(Connecting pipe)
∅ 6.35
T
P
Refrigerant
R22 1.15 kg
Mark ( ) means check points of Gas Leak
Capillary tube
∅2.0x1400 s
Capillary tube
∅0.6x600 s
Note :Measure the heat exchanger temperature at the center of U-bend. (By means of TC sensor.)
*1 : During heating overload, the high temperature limit control operation is included.
Ambient temp.
conditions DB/WB
(°C)
Indoor Outdoor
Standard 1.66 43.0 High 20/–7/6
Heating High temperature*1 2.18 ~ 2.34 47.0 ~ 55.0 Low27/–24/18
Low temperature 1.2 34.0 High 20/––10/–10
Standard 0.48 10.8 High 27/19 35/24
Cooling High temperature 0.6 15.0 High 32/23 43/26
Low temperature 0.32 1.8 Low21/15 21/15
Fan speed
(indoor)
50 Hz Standard
pressure
P
(MPaG)
Surface temp. of heat
exchanger interchanging
pipe
T
(°C)
DryerDryer
5. REFRIGERATION CYCLE DIAGRAMFILE NO. SVM-06004
5-1. RAS-18NKHP-E / RAS-18NAH-E

–15 –
FILE NO. SVM-06004
5-2.RAS-24NKP-E / RAS-24NA-E
Note : Measure the heat exchanger temperature at the center of U-bend.(By means ofTC sensor.)
Ambient temp.
conditions DB/WB
(°C)
Indoor Outdoor
Standard 0.43 8.5 High 27/19 35/24
Cooling High temperature 0.56 12.5 High 32/23 43/26
Low temperature 0.32 2.0 Low21/15 21/15
Fan speed
(indoor)
50 Hz Standard
pressure
P
(MPaG)
Evaporator
Indoor unit
Cross flow fan
Cooling
Condenser
Propeller fan
Outdoor unit
PH400X3CS-4KT1
Cooling
O.D.:15.88 mm O.D.:6.35 mm
Cooling
Gas container connection (Reinstall etc.)
Packed valve
( ∅ 6.35)
Packed valve
( ∅ 15.88)
0.39 m
(Connecting pipe)
∅ 15.88
0.49 m
(Connecting pipe)
∅ 6.35
T
P
Refrigerant
R22 1.68 kg
Compressor
Mark ( ) means check points of Gas Leak
Capillary tube
∅2.4x700 s
Surface temp. of heat
exchanger interchanging
pipe
T
(°C)
RAS-24NKPX / RAS-24N2AX

–16 –
FILE NO. SVM-06004
5-3.RAS-18NKP-E / RAS-18NA-E
Note : Measure the heat exchanger temperature at the center of U-bend.(By means ofTC sensor.)
Ambient temp.
conditions DB/WB
(°C)
Indoor Outdoor
Standard 0.41 11.0 High 27/19 35/24
Cooling High temperature 0.56 15.0 High 32/23 43/26
Low temperature 0.32 2.0 Low21/15 21/15
Fan speed
(indoor)
50 Hz Standard
pressure
P
(MPaG)
Indoor unit
Cross flow fan
Compressor
Condenser
Propeller fan
Outdoor unit
PH340X3C-4KT1
O.D.:12.7 mm O.D.:6.35 mm
Packed valve
(∅12.7) Packed valve (∅6.35)
T
P
Refrigerant
R22 1.0 kg
Evaporator
0.39 m
(Connecting pipe)
∅12.7
0.49 m
(Connecting pipe)
∅6.35
Mark ( ) means check points of Gas Leak
Capillary tube
∅2.0x600 s
Surface temp. of heat
exchanger interchanging
pipe
T
(°C)

–17 –
FILE NO. SVM-06004
5-4.RAS-B18NKPX / RAS-18N2AX
Indoor unit
Cross flow fan
Compressor
Condenser
Propeller fan
Outdoor unit
PH340X3C-4KT1
O.D.:12.7 mm O.D.:6.35 mm
Packed valve
(∅12.7) Packed valve (∅6.35)
T
P
Refrigerant
R22 1.0 kg
Evaporator
0.39 m
(Connecting pipe)
∅12.7
0.49 m
(Connecting pipe)
∅6.35
Mark ( ) means check points of Gas Leak
Capillary tube
∅2.0x600 s
Note : Measure the heat exchanger temperature at the center of U-bend. (By means of TC sensor.)
Ambient temp.
conditions DB/WB
(°C)
Indoor Outdoor
Standard 0.41 11.0 High 27/19 35/24
Cooling High temperature 0.56 15.0 High 32/23 43/26
Low temperature 0.32 2.0 Low21/15 21/15
Fan speed
(indoor)
50 Hz Standard
pressure
P
(MPaG)
Surface temp. of heat
exchanger interchanging
pipe
T
(°C)
Dryer

– 18 –
FILE NO. SVM-06004
6. CONTROL BLOCK DIAGRAM
6-1.RAS18NKHP-E
REMOTE CONTROL
Indoor Unit Control Panel
Heat Exchanger Sensor
Temperature Sensor
Infrared Rays Signal Receiver
Initiallizing Circuit
Clock Frequency
Oscillator Circuit
Power Supply
Circuit
Noise Filter
From Outdoor Unit
220 ~ 240 V AC 50 Hz
M.C.U.
Functions
•Louver Control
•3-minute Delay at Restart for Compressor
•Motor Revolution Control
•Processing
•Timer
•Serial Signal Communication
Louver ON/OFF Signal
Louver Driver
Serial Signal Transmitter/Receiver
Serial Signal Communication
Operation
Display
Timer
Display
Filter Sign
Display
PRE DEF.
Sign Display
Indoor
Fan Motor
Hi Power
Sign Display
Louver Motor
Infrared
Rays
Remote
Control
(Temperature Processing)
Operation ( )Operation ( )
Remote Control
Operation Mode Selection
AUTO, COOL, DRY, HEAT, FAN ONLY
Temperature Setting
Fan Speed Selection
ON TIMER Setting
OFF TIMER Setting
Louver Auto Swing
Louver Direction Setting
ECO
Hi power
TIMER 1.3.5.9H
Infrared Rays
COMFORT SLEEP
QUIET

–19 –
FILE NO. SVM-06004
REMOTE CONTROL
Heat Exchanger Sensor
Relay RY04
Outdoor Unit
Outdoor unit
ON/OFF Signal
Relay Driver
Indoor Unit Control Panel
Temperature Sensor
Infrared Rays Signal Receiver
Initiallizing Circuit
Clock Frequency
Oscillator Circuit
Power Supply
Circuit
Noise Filter
From Outdoor Unit
220 ~ 240 V AC 50 Hz
M.C.U.
Functions
•Louver Control
•3-minute Delay at Restart for Compressor
•Motor Revolution Control
•Processing
•Timer
Louver ON/OFF Signal
Louver Driver
Operation
Display
Timer
Display
Filter Sign
Display
Fan Only
Sign Display
Indoor
Fan Motor
Hi Power
Sign Display
Louver Motor
Infrared
Rays
Remote
Control
(Temperature Processing)
Operation ( )Operation ( )
Remote Control
Operation Mode Selection
AUTO, COOL, DRY, FAN ONLY
Temperature Setting
Fan Speed Selection
ON TIMER Setting
OFF TIMER Setting
Louver Auto Swing
Louver Direction Setting
ECO
Hi power
TIMER 1.3.5.9H
Infrared Rays
COMFORT SLEEP
QUIET
6-2. RAS-18NKP-E / RAS-18NA-E, RAS-B18NKPX / RAS-18N2AX
RAS-24NKP-E / RAS-24NA-E, RAS-24NKPX / RAS-24N2AX