Toshiba RAS-18NKHP-E, RAS-18NAH-E, RAS-18NKP-E, RAS-24NA-E, RAS-18NA-E Service 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 V 220 – 240
Hz 50
Power consumption W 2350 2440 2350 2440
Power factor % 99 90 99 90
Running current A
0.3/10.5 0.3/11.0 0.3/10.50 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 mm 220
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 mm 780
Depth mm 290
Net weight kg
52
Condenser type Finned tube
Outdoor fan type Propeller fan
Airflow volume m3/h
2600
2400 2600
Fan motor output W 42
Compressor
Model
Output W
1800
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 V 220 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 V 220 – 240
Hz 50
Power consumption W
1920 2040 1800 1950
1910 1990 1910 1990
Power factor % 95 88 94 86 92 85 92 85
Running current
A
0.2/9.15 0.2/9.40 0.3/9.15 0.3/9.40
Indoor/Outdoor 8.9 9.4 8.4 9.2
Starting current A 42
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
m
15*
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 mm 220
Net weight kg 13
Evaporator type Finned tube
Indoor fan type Cross flow fan
High fan m3/h 900 900 900
Air volume Medium fan m3/h 650 700 650
Low fan m3/h 530 570 530
Fan motor output W 30
Air filter Honeycomb woven filter with PP frame
OUTDOOR UNIT RAS-18NAH-E RAS-18NA-E RAS-18N2AX
Height mm 550
Dimensions Width mm 780
Depth mm 290
Net weight kg 43 41
Condenser type Finned tube
Outdoor fan type Propeller fan
Airflow volume m3/h
Fan motor output W
42
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
CONSTRUCTION VIEWS
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
∅
6
5
(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-Ø
10 anchor bolt)
B
Ø
6
Hole
Ø
11x14 Hole
50
36
R
15
R
5.5
Ø
6 hole
28
321
86
A
124109
6
00 or more
Air out
let
321
600
Air inlet
4x
Ø
11 Long holes(For
Ø8-Ø
10 anchor bolt)
Gas-side
(Flare Ø15.88)
Liquid side
(Flare Ø6.35)
90 600 90 69
342
321
Z
50
36
R
15
B Detail Drawing (Front leg)
Ø
436
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
Ø
Ø
Ø
Ø
6 hole
86
Ø
6 hole
Ø
11x14 hole
R
15
28
A
321
R5.5
36
109 124
50
129
84
5
4
600
321
9060090
275
290
550
Ø
436
Z
R
15
50
36
-
2
321
342
69
Ø
Ø
Ø
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
1
1
2
3
3
1
1
2
3
3
i
L
N
3
1
2
i
FERRITE CORE
GRN&YEL
RED
RED
BLK
BLK
MAGNETIC
CONTACTOR
R
A1
A2
52C
U
S
V
T
W
PNK
WHI
COMPRESSOR TERMINAL
BLK
S
R
C
WHI
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
1
1
3
3
1
1
3
3
2
CN11
BLU
YEL
1
313
1
1
3
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
1
2
POWER SUPPLY
220- 240 V ~ 50 Hz
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
7
8 9
9871 2 3
CN25
P04BLK
4 6
WHI
5
250V6.3A
F01
DSA
Varistor
motor
Louver
BLU
ORN
5
5 223311
RED
YEL
CN07
PNK
4
4
98 1071 2 3
and Indication parts
4 65
YEL
GRY
BRW
TEMP FUSE
145 C
66554
4
1
3
2
1
3
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
L
N
3
1
2
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 M OT OR
B LK
C OMP R ES S O R TE R MIN AL
R
S
C
3
1
2
INDOOR
TERMINAL
BLOCK
OUTDOOR
TERMINAL
BLOCK
INDOOR
UNIT
OUTDOOR
UNIT
105 64321
7
8 9
5 98
7
1 2 3 4 6 10
YEL
GRY
BRW
TEMP FUSE
145 C
66554
4
1
3
2
1
3
2
Control
Fan motor
circuit
Power supply
circuit
(TC)
sensor
Heat exchanger
(TA)
sensor
Thermo.
1
1
2
CN03
BLK
2
BLK
BLK2BLK
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
7
8 9
CN25
P04
GRN&YEL
BLK
WHI
Varistor
250V
6.3A
DSA
Varistor
motor
Louver
BLU
ORN
5
5 223311
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
L
N
3
1
2
i
GRN&YEL
RED
RED
GRY
RED
BLK
BLK
BLK
BLK
GRN&YEL
CHASSIS
MAGNETIC
CONTACTOR
A1
A2
U
V
W
R
S
T
SPARK KILLER
FAN MOTOR
WHI
BLK
RED
RED
CAPACITOR
WHI
BLK
PNK
S
R
C
(or A)
(or B)
105 64321
7
8 9
5 98
7
1 2 3 4 6 10
YEL
GRY
BRW
TEMP FUSE
145 C
66554
4
1
3
2
1
3
2
Control
Fan motor
circuit
Power supply
circuit
(TC)
sensor
Heat exchanger
(TA)
sensor
Thermo.
1
1
2
CN03
BLK
2
BLK
BLK2BLK
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
7
8 9
CN25
P04
GRN&YEL
BLK
WHI
Varistor
250V
6.3A
F01
DSA
Varistor
motor
Louver
BLU
ORN
5
5 223311
RED
YEL
CN07
PNK
4
4
Infrared rays receive
CN30
3
1
2
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
1 Compressor PH340X3C-4KT1 Winding resistance (Ω) C-R C-S
(at 20°C) 1.46 2.47
Output (Rated) 42 W, 4 poles, 1 phase, 220 – 240 V, 50 Hz
2 Fan motor (for outdoor) FG-240-42A-1 Winding resistance (Ω) Red-Black White-Black
(at 20°C) 128 126
3
Running capacitor
451305L AC 450 V, 3.0µF
(for fan motor)
4
Running capacitor
RS44B506U0218S AC 440 V, 50µF
(for compressor)
5
Solenoid coil
VHV (STF) AC 220 – 240 V
(for 4-way valve)
6 Thermo sensor TE / TD 10 kΩ at 25°C / 50 kΩ at 25°C
7 Magnetic 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
FILE NO. SVM-06004
4-1. Indoor Unit (RAS-18NKHP-E)
No. Parts name Type Specifications
1 Fan motor (for indoor) AFS-220-31A AC 200 − 240V, 31W
2 Thermo sensor (TA-sensor) ——— 10 kΩ at 25°C
3 Micro Power Module (M01) µRM1260V DC 390 V, Secondary DC 12 V, 5 V
4 Microcontroller TMP87CM40AN
5 Heat exchanger sensor
——— 10 kΩ at 25°C
(TC-sensor)
6 Line filter (L01) LC*SS11V-06270 27mH, 600mA
7 Diode (DB01) D3SBA60 4 A, 600 V
8 Capacitor (C63) KMH400VSSN47M22S 4.7µF, 400 V
9 Fuse (F01) BET6.3A T6.3 A, 250 V
10 Varistor (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
1 Compressor 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 − 240 V, 50 Hz
1 Compressor PH400X3CS-4KT1 Winding resistance (Ω ) C-R C-S
(at 20 °C)
Output (Rated) 42 W, 4 poles, 1 phase, 220 − 240 V, 50 Hz
Winding resistance (Ω) Red-Black White-Black
2 Fan motor (for outdoor)
(at 20 °C)
128 126
FG-240-42A
AC 440 V, 50µF
3
Running capacitor
451305L
AC 450 V, 3.0µF
(for fan motor)
RS44B506U0218S
4
5 Magnetic contactor
A35
220 − 240 V, 50 Hz
Running capacitor
(for compressor)
1.13
2.10
2 Fan motor (for outdoor) WLF-240-42A-1 Winding resistance (Ω) Red-Black White-Black
(at 20°C) 188 289
3
Running capacitor
451205L AC 450 V, 2.0µF
(for fan motor)
4
Running 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
1 Fan motor (for indoor) AFS-220-31A AC 200 − 240V, 31W
2 Thermo sensor (TA-sensor) ——— 10 kΩ at 25°C
3 Micro Power Module (M01) µRM1260V DC 390 V, Secondary DC 12 V, 5 V
4 Microcontroller TMP87CM40AN
5 Heat exchanger sensor
——— 10 kΩ at 25°C
(TC-sensor)
6 Line filter (L01) LC*SS11V-06270 27mH, 600mA
7 Diode (DB01) D3SBA60 4 A, 600 V
8 Capacitor (C63) KMH400VSSN47M22S 4.7µF, 400 V
9 Fuse (F01) BET6.3A T6.3 A, 250 V
10 Varistor (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
13 Relay : (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 Low 27/– 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 Low 21/15 21/15
Fan speed
(indoor)
50 Hz
Standard
pressure
P
(MPaG)
Surface temp. of heat
exchanger interchanging
pipe
T
(°C)
DryerDryer
5. REFRIGERATION CYCLE DIAGRAM
FILE 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 of TC 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 Low 21/15 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)
∅
1 5.88
0.49 m
(Connecting pipe)
∅
6 .35
T
P
Refrigerant
R22 1.68 kg
Compressor
Mark ( ) means check points of Gas Leak
Capillary tube
∅2.4x
700 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 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 Low 21/15 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 Low 21/15 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
FILE NO. SVM-06004
7. OPERATION DESCRIPTION
7-1-1. Louver control
(1) Vertical air flow louver
Position of veritcal air flow louver is automatically
controlled according to the operation mode.
Besides, position of vertical air flow louver can be
arbitrarily set by pressing [FIX] button.
The louver position which is set by [FIX] button is
stored in the microcomputer, and the louver is
automatically set at the stored position for the next
operation.
(2) Swing
If [SWING] button is pressed when the indoor unit
is in operation, the vertical air flow louver starts
swinging. When [FIX] button is pressed, it stops
swinging.
7-1-2. Indoor fan control (AC Fan motor)
(1) The indoor fan is operated by the stepless speed
change AC motor.
(2) For air flow level, speed of the indoor fan motor is
controlled in five steps (LOW, LOW
+
, MED, MED
+
and HIGH). If AUTO mode is selected, the fan
motor speed is automatically controlled by the
difference between the preset temperature and
the room temperature.
7-1. Outline of Air Conditioner Control
This is a fixed capacity type air conditioner, which uses
a AC motor for an indoor fan. The AC motor drive
circuit is mounted in the indoor unit. And electrical
parts which operate the compressor and the outdoor
fan motor, are mounted in the outdoor unit.
The air conditioner is mainly controlled by the indoor
unit controller. The controller operates the indoor fan
motor based upon commands transmitted by the
remote control and transfers the operation commands
to the outdoor unit controller.
The outdoor unit controller receives operation
commands from the indoor unit, and operates the
outdoor fan motor and the compressor.
(1) Role of indoor unit controller
The indoor unit controller receives the operation
commands from the remote control and executes
them.
• Temperature measurement at the air inlet of the
indoor heat exchanger by the indoor
temperature sensor
• Temperature setting of the indoor heat
exchanger by the heat exchanger sensor
• Louver motor control
• Indoor fan motor operation control
• LED display control
• Transferring of operation commands to the
outdoor unit
• Receiving of information of the operation status
and judging of the information or indication of
error
(2) Role of outdoor unit controller
The outdoor unit controller receives the operation
commands from the indoor controller and
executes them.
• Compressor operation
control
• Operation control of
outdoor fan motor
• Turning off the compressor and outdoor fan
when the outdoor unit receives the shutdown
command
• Defrost control in heating operation
(Temperature measurement by the outdoor heat
exchanger and control for the four-way valve
and the outdoor fan motor) *Heat pump Model
only
Operations according
to the commands
from the indoor unit
LOW
+
=
MED+=
LOW+MED
2
MED+HIGH
2
Table 7-1-1
FAN TAP
Cooling UH H M+
L+
L- SUL/SL-
OPERATION
Fan only
H
M
L
L-
Dry
M
L
L- UL SUL
MODE
Heat
UH H
M+
L
1300
1050
650
RAS-24NKP Series
830
700
750
1050
380 220
Air flo w volume (m3/h)
708
873
667
667
300
950
600
Air flow volume (m3/h)
750 584
300
Model
RAS-18NKHP Series
rpm
Air flow volume (m3/h)
1250
1100
1150
950
700
500
1100
1300
1050
570
600
700
380
RAS-18NKP Series
SUL/SL-
ULL+
M+ M
L+
L
L-
M
L+
L
800
461
380
700
461
900
543
461
800
800
530
1000
625
543
900
900
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
− 20 −
−
900
rpm
rpm
– 21 –
FILE NO. SVM-06004
7-2. Description of Operation Circuit
(1) When turning on the breaker, the operation lamp
blinks. This means that the power is on (or the
power supply is cut off.)
(2) When pressing [ ] button on the
remote control, receiving beep sounds from the
indoor unit, and the next operation is performed
together with opening the vertical air flow louver.
(3) Once the operation mode is set, it is memorized in
the microcomputer so that the previous operation
can be effected thereafter simply by pressing
[ ] button.
7-2-1. Fan only operation
([MODE] button on the remote control is set
to the fan only operation.)
(1) When [FAN] button is set to AUTO, the indoor fan
motor operates as shown in Fig. 7-2-1. When
[FAN] button is set to LOW, LOW+, MED, MED+ or
HIGH, the motor operates with a constant air flow.
NOTE :
*1: The values marked with *1 are calculated and
controlled by the difference in motor speed
between M+ and L–.
7-2-2. Cooling operation
([MODE] button on the remote control is set
to the cooling operation.)
(1) The compressor, 4-way valve, outdoor fan and
operation display lamp are controlled as shown in
Fig. 7-2-2.
Fig. 7-2-2
(2) When [FAN] button is set to AUTO, the indoor fan
motor operates as shown in Fig. 7-2-3. When
[FAN] button is set to LOW, LOW+, MED, MED+ or
HIGH, the motor operates with a constant air flow.
NOTE :
*1: The values marked with *1 are calculated and
controlled by the difference in motor speed
between M+ and L–.
Fig. 7-2-3 Setting of air flow [FAN:AUTO]
*1
*1
*1
+3
+2.5
+2
+1.5
+1
+0.5
-0.5
0
M+
Preset
temp.
°C
(Room temp.) − (Preset temp.)
0.5
0
Preset
temp.
ON ON
OFF OFF OFF ON
Compressor
4-way valve
Outdoor fan
OPERATION
display lamp
(Room temp.) (Preset temp.)
(Preset temp.: 24°C)
+2
+2.5
+3
°C
+1.5
+1
+0.5
0
M+
*1
*1
*1
(Room temp.) − (Preset temp.)
Preset
temp.
°C
operation cannot be set.
Fig. 7-2-1 Setting of air flow [FAN:AUTO]
(2) The Hi POWER, ECO and COMFORT SLEEP
– 22 –
FILE NO. SVM-06004
7-2-4. Heating operation *Heat pump model only
([MODE] button on the remote control is set
to the heating operation.)
(1) The compressor, 4-way valve, outdoor fan and
operation display lamp are controlled as shown in
Fig. 7-2-6.
Fig. 7-2-6
(2) When [FAN] button is set to AUTO, the indoor fan
motor operates as shown in Fig. 7-2-7. When
[FAN] button is set to LOW, LOW+, MED, MED+ or
HIGH, the motor operates with a constant air flow.
*1, *2 : The values marked with *1 and *2 are
calculated and controlled by the difference in
motor speed between M+ and L.
Fig. 7-2-7 Setting of air flow [FAN:AUTO]
7-2-3. Dry operation
([MODE] button on the remote control is set
to the dry operation.)
(1) The compressor, 4-way valve, outdoor fan and
operation display lamp are controlled as shown in
Fig. 7-2-4.
Fig. 7-2-4
(2) The microprocessor turns the compressor on and
off at the regular intervals (4 to 6 minutes). While
the compressor is turning off, the indoor fan motor
operates in the SUPER LOW position.
The pattern of operation depending on the relation
between room temperature and preset
temperatures is shown in Fig. 7-2-5.
Fig. 7-2-5
(3) [FAN] button on the remote control is set to AUTO
only.
(4) The ECO and Hi Power operations can not be set.
Preset
temp.
+3
+2
+1
0
Preset temp.+1
Preset temp.
Compressor
Outdoor fan
Indoor fan
L. *S.L. S.L.L. L. S.L. L.
ON ON ON ON
OFF OFF OFF
*Super Low
OFF
ON
OFF
4-way valve
Outdoor fan
OPERATION
Compressor
ON:6min.
OFF:4min.
ON:5min.
OFF:5min.
OFF
ON:6min.
OFF:4min.
ON:5min.
OFF:5min.
display lamp
(Room temp.) (Preset temp.)
R oom temp.
ON
OFF
ON
OFF
ON
4-way valve
Outdoor fan
Compressor
Preset
temp.
OPERATION
display lamp
0
0.5
(Room temp.) (Preset temp.)
ON
[FAN AUTO]
-0.5
-1
-1.5
-2
*1
*2
-5.0
-5.5
0
Preset
temp.
M
+
H
L
°C
(Room temp.) − (Preset temp.)
°C
°C
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