Toshiba RAS-24UAH-ES, RAS-24UKP-ES, RAS-24UKHP-ES, RAS-18UAH-ES, RAS-18UKHP-ES SERVICE MANUAL
SERVICE MANUAL
AIR-CONDITIONER
FILE NO. SVM-01006
SPLIT WALL TYPE
RAS-24UKHP-ES / RAS-24UAH-ES
/
RAS-24UKP-ES
RAS-18UKHP-ES
/
RAS-18UKP-ES
RAS-24UA-ES
RAS-18UAH-ES
/
RAS-18UA-ES
24 Class18 Class
CONTENT
1. SPECIFICATIONS
2. CONSTRUCTION VIEWS
2-1 Indoor Unit
2-2 Outdoor Unit (RAS-24UAH-ES,24UA-ES)
2-3 Outdoor Unit (RAS-18UAH-ES, 18UA-ES)
3. WIRING DIAGRAM
3-1 RAS-24UKHP-ES/24UAH-ES
3-2 RAS-24UKP-ES/24UA-ES
3-3 RAS-18UKHP-ES/18UAH-ES
3-4 RAS-18UKP-ES/18UA-ES
4. SPECIFICATION OF ELECTRICAL PARTS
4-1 Indoor Unit (RAS-24UKHP-ES,18UKHP-ES)
4-2 Outdoor Unit (RAS-24UAH-ES)
4-3 Outdoor Unit (RAS-18UAH-ES)
4-4 Indoor Unit (RAS-24UKP-ES, 18UKP-ES)
4-5 Outdoor Unit (RAS-24UA-ES)
4-6 Outdoor Unit (RAS-18UA-ES)
5. REFRIGERATION CYCLE DIAGRAM
5-1 RAS-24UKHP-ES/24UAH-ES
5-2 RAS-24UKP-ES/24UA-ES
5-3 RAS-18UKHP-ES/18UAH-ES
5-4 RAS-18UKP-ES/18UA-ES
6. CONTROL BLOCK DIAGRAM
6-1 RAS-24UKHP-ES, 18UKHP-ES
6-2 RAS-24UKP-ES, 18UKP-ES
7. OPERATION DESCRIPTION
7-1 Outline of Air Conditioner Control
7-2 Description of Operation Circuit
7-3 ECO Mode
7-4 Hi POWER Mode
7-5 High-Temperature Limit Control
7-6 Low-Temperature Limt Control
7-7 Defrosting Operation
7-8 Auto Restart Function
7-9 Filter Check Lamp
– 1 –
TCTC Service Manual 18/24UKHP-ES (EN) File No. SVM-01006
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 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. PART REPLACEMENT
10-1 Indoor Unit
10-2 Outdoor Unit (RAS-24UAH-ES, 24UA-ES)
10-3 Outdoor Unit (RAS-18UAH-ES, 18UA-ES)
11. EXPLODED VIEWS AND PARTS LIST
11-1 Indoor Unit (1)
11-2 Indoor Unit (2)
11-3 Outdoor Unit
• This air conditioner is charged with HFC (R-410A)
• This air conditioner requires special service tools
that does not deplete the Ozone layer.
for the refrigerant R-410A.
– 2 –
TCTC Service Manual 18/24UKHP-ES (EN) File No. SVM-01006
1. SPECIFICATIONS
ITEM
MODEL
Capacity kW
RAS-24UKHP-ES/24UAH-ES RAS-24UKP-ES/24UA-ES RAS-18UKHP-ES/18UAH-ES RAS-18UKP-ES/18UA-ES
Cooling Heating Cooling Cooling Heating Cooling
220V 240V 220V 240V 220V 240V 220V 240V 220V 240V 220V 240V
6.30 6.30 6.80 6.90 6.40 6.45 5.00 5.05 5.45 5.55 5.05 5.10
Phase 1ø
Power source
V 220-240
Hz 50
Power consumption kW 2430 2510 2430 2530 2360 2440 1850 1900 1750 1830 1820 1870
Power factor % 96 92 96 92 96 92 98 97 98 97 98 97
220V 240V 220V 240V 220V 240V 220V 240V 220V 240V 220V 240V
Running current A 0.3/ 0.3/ 0.3/ 0.3/
Indoor / Outdoor 11.2 11.1 11.2 11.2 8.4 8.0 7.9 7.7
0.3/10.9 0.3/10.8
0.2/ 0.2/ 0.2/ 0.2/
0.2/8.2 0.2/7.8
Starting current A 54 47
Moisture removal lit/h 2.5 2.7 2.0 2.0
Noise
Refrigerant
Indoor (H/M/L) dB 45/41/37 42/39/35
Outdoor (220-240V) dB 56-57 57-58 56-57 51-52 52-53 51-52
Name of refrigerant R410A
Rated amount kg 1.6 1.3 1.2
Refrigerant control Capillary tube
Gas side size mm
Ø
12.7
Connection type Flare connection
Interconnection
pipe
Liquid side size mm
Connection type Flare connection
Maximum lenght
(One way) 25
m
15
*1
*2
15
*1
*2
25
Ø
6.35
15
*1
*2
20
15
*1
20*2
Maximum height difference
m10 10 8 8
INDOOR UNIT RAS-24UKHP-ES RAS-24UKP-ES RAS-18UKHP-ES RAS-18UKP-ES
Height mm 298
Dimensions Width mm 998
Depth mm 208
Net weight kg 12
Evaporator type Finned tube
Indoor fan type Cross flow fan
High fan m3/h 950 950 950 750 800 750
Air volume Medium fan m3/h 750 800 750 650 700 650
Low fan m3/h 600 650 600 530 570 530
Fan motor output W 30
Air filter Honeycomb woven filter with PP frame
OUTDOOR UNIT RAS-24UAH-ES RAS-24UA-ES RAS-18UAH-ES RAS-18UA-ES
Height mm 690 690 538 538
Dimensions Width mm 880 880 830 830
Depth mm 310 310 300 300
Net weight kg 67 64 51 50
Condenser type Finned tube
Outdoor fan type Propeller fan
Airflow volume m3/h 3400 3600 3400 3600 3400 3600 1800 2000 1800 2000 1800 2000
Fan motor output W 65 42
Compressor
Model PA290X3F-4MS PA225X3F-4L
Output W 2200 1500
Safety device IOL, Td Sensor, IOL, Case Thermo IOL, Td Sensor IOL, Case Thermo
Louver type Automatic louver
Usable outdoor temperature range°C 15 ~ 43 -10 ~ 24 15 ~ 43 15 ~ 43 -10 ~ 24 15 ~ 43
– 3 –
TCTC Service Manual 18/24UKHP-ES (EN) File No. SVM-01006
Note : 1
• Capacity is based on the following temperature conditions.
Condition
Temperature
Indoor unit inlet air temperature
Outdoor unit inlet air temperature
(DB) 27 °C 20 °C
(WB) 19 °C 12 °C
(DB) 35 °C 7 °C
(WB) 24 °C 6 °C
Note : 2
• Charge refrigerant according to the table below.
Refrigerant
1 No need to charge
*
refrigerant
2 Need to charge
*
refrigerant
RAS-24UKHP-ES/24UAH-ES
RAS-24UKP-ES/24UA-ES
15m or less
Over 15m up to 25m (20g/m)
JIS C9612-1994
Cooling Heating
RAS-18UKHP-ES/18UAH-ES
RAS-18UKP-ES/18UA-ES
15m or less
Over 15m up to 20m (20g/m)
– 4 –
TCTC Service Manual 18/24UKHP-ES (EN) File No. SVM-01006
2-1. Indoor Unit
RAS-24UKHP-ES
RAS-24UKP-ES
RAS-18UKHP-ES
RAS-18UKP-ES
Back body
Front panel
Grille inlet
298
2. CONSTRUCTION VIEWS
998
208
75
7
51
Knock out system
Outline of indoor unit
55 or more
Minimum distance
to ceiling
298
Connecting pipe (0.39m)
(Flare ø12.7)
20
48
998
763.5
450
Drain hose (0.54m)
Connecting pipe (0.49m)
(Flare ø6.35)
20
10
75
50
56
For stud bolt (ø6)
For stud bolt (ø8 – ø10)
29
41
55
5555
50
Knock out system
57
Wireless remote
control
48
18
75
8
160
ø65
40
ø65
100
Installation
Plate outline
100
– 5 –
TCTC Service Manual 18/24UKHP-ES (EN) File No. SVM-01006
2-2. Outdoor Unit
RAS-24UAH-ES
RAS-24UA-ES
4-ø12x18
for ø8 – ø10
anchor bolt
600 or
more
600
or more
600
Air inlet
Mounting dimension of anchor bolt
100 or
more
52
68
ø25 Drain outlet
120
Air outlet
100
or more
140
600
310
23
Electric
Parts cover
Liquid side
(Flare ø6.35)
Gas side
(Flare ø12.7)
Service Port
12
364
340 (pitch)
12
88
74
Handle
880
A
Detail Drawing
A
600
63.8
340
27
ø12x18 hole
50
340
4-ø12x18 holes
(for ø8 – ø10 anchor bolt)
690
– 6 –
TCTC Service Manual 18/24UKHP-ES (EN) File No. SVM-01006
Handle
2-3. Outdoor Unit
RAS-18UAH-ES
RAS-18UA-ES
4xø11x14
600 or more
600
600 or
Air inlet
for ø8-ø10
anchor bolt
more
Electric
Parts cover
Liquid side
(Flare ø6.35)
Gas side
(Flare ø12.7)
Installation dimension
120
Air inlet
325
100 or more
Air
outlet
100 or more
8-ø6 holes
(for fixing outdoor unit)
6-ø11x14 holes
(for ø8 – ø10 anchor bolt)
ø25 Drain outlet
344
Service Port
91 54
160
50
90
600
830
A
A Detail Drawing
600
R10
52
325
ø6 hole
ø11x14 hole
Fan guard
Handle
ø420
538
– 7 –
90
300
TCTC Service Manual 18/24UKHP-ES (EN) File No. SVM-01006
3. WIRING DIA GRAM
3-1. RAS-24UKHP-ES/RAS-24U AH-ES
COLOR IDENTIFICATION
:
BRW
:
RED
:
WHI
:
YEL
:
BLU
:
BLK
:
GRY
:
PNK
:
ORN
:
GRN&YEL
:GRN
SG01
DSA
R22
VARISTOR
T6. 3A 250V
F01 FUSE
BLK
WHI
RED
GRN&YEL
BLK
P04
CN30
CN31
CN23
BROWN
RED
WHITE
YELLOW
BLUE
BLACK
GRAY
PINK
ORANGE
GREEN &
GREEN
YELLOW
R09
R21
LOUVER
MOTOR
BLU
6
6
IC04
L01
R01
DB01
C15
C01
MAIN P.C. BOARD
(MCC-821)
CN13
3
4
1
2
5
6
7 8 9
3
4
1
2
5
6
7 8 9
BLU
BLU
BLU
BLU
BLU
BLU
BLU
BLU
3
4
1
2
3
4
1
2
INFRARED RAYS RECEIVE
AND INDICATION PARTS
BLU
5
6
7 8 9
5
6
7 8 9
ORN
PNK
YEL
RED
4
3
5
2
4
3
5
2
CN 07
CN03 CN01
10
10
WHI
10
CN25
10
FAN MOTOR
DC MOTOR
BRW
6
1
6
1
CN 10
C02
IC
IC01
2
1
2
1
THERMO
BLK
BLK
SENSOR
(TA)
5
5
C06
4
4
T01
3
3
1
1
BLK
2
2
BLK
1
1
DC15V
DC0V
DC12V
DC7V
DC0V
IC02
HEAT
EXCHANGER
SENSOR
(TC)
POWER
TERMINAL
BLOCK
POWER SUPPLY
220-240 V~, 50 Hz
i
L
N
BLK
RED
GRN&YEL
REDBLK
CAPACITOR
RED
WHI
PNK
COMPRESSOR
INDOOR
TERMINAL
BLOCK
OUTDOOR
TERMINAL
BLOCK
FERRITE CORE
21
22
S
C
R
5L3
BLK
1
2
1
2
MAGNETIC SWITCH
3L2
6T3
4T2
3
i
3
INDOOR
UNIT
OUTDOOR
UNIT
GRN&YEL
i
CHASSIS
1L1
2T1
A1
52C
A2
CAPACITOR
RED
WHI
RED
FAN MOTOR
BLK
– 8 –
TRANSFORMER
COIL FOR
4 WAY VALVE
BLK
BLK
RED
RED
BLK
BLK
WHI
RED
GRY
BLU
YEL
BLK
BLK
1
3
1
3
1
3
5
7
9
1
3
1
313
1
313
MAIN P.C. BOARD (MCC-1275)
1
2
CN06
3
1
CN05
3
TNR
DSA
R74
1
F01
3
T5A 250VAC
5
CN01
7
9
1
3
CN04
5
CN11
CR11
CN02
CR12
CN03
1
1
BLK
TNR
R73
RY07
RY05
3
TNR R96
ICO7
CN07
CN08
DISCHARGE
PIPE
SENSOR (TD)
BLK
1
1
2
3
3
BLK
BLK
1
1
2
3
3
BLK
HEAT
EXCHANGER
SENSOR (TE)
TCTC Service Manual 18/24UKHP-ES (EN) File No. SVM-01006
3-2. RAS-24UKP-ES/RAS-24UA-ES
COLOR IDENTIFICATION
BRW
RED
GRY
PNK
ORN
GRN&YEL
SG01
DSA
R22
VARISTOR
T6.3A 250V
F01 FUSE
BLK
WHI
RED
GRN&YEL
CN27
BLK
P04
CN30
CN31
11
3
WHI
YEL
BLU
BLK
:
BROWN
:
RED
:
WHITE
:
YELLOW
:
BLUE
:
BLACK
:
GRAY
:
PINK
:
ORANGE
:
GREEN &
:
GREENGRN
RY04
YELLOW
R09
R21
LOUVER
MOTOR
BLU
6
6
IC04
L01
R01
DB01
C15
C01
MAIN P.C. BOARD
(MCC-821)
CN13
3
4
1
2
5
6
7 8 9
3
4
1
2
5
6
789
BLU
BLU
BLU
BLU
BLU
BLU
BLU
BLU
3
4
1
2
3
4
1
2
INFRARED RAYS RECEIVE
AND INDICATION PARTS
BLU
5
6
7 8 9
5
6
7 8 9
ORN
PNK
YEL
RED
4
3
5
2
4
3
5
2
CN 07
CN03 CN01
10
10
WHI
10
CN25
10
FAN MOTOR
DC MOTOR
BRW
6
1
6
1
CN 10
C02
IC
IC01
2
1
2
1
BLK
BLK
THERMO
SENSOR
(TA)
5
5
C06
4
4
T01
3
3
1
1
BLK
1
1
IC02
2
2
BLK
EXCHANGER
SENSOR
DC15V
DC0V
DC12V
DC7V
DC0V
HEAT
(TC)
POWER
TERMINAL
BLOCK
BLK
POWER SUPPLY
220-240V~ 50Hz.
L
N
BLK
RED
GRN&YEL
BLK BLK
SPARK KILLER
A1 A2
RED RED
MAGNETIC SWITCH
52C
2T1
1L1
3L2 4T2
5L3 6T3
INDOOR
TERMINAL
BLOCK
OUTDOOR
TERMINAL
BLOCK
FERRITE CORE
RED
CAPACITOR
WHI
PNK
– 9 –
3
1
2
3
1
2
GRN&YEL
CHASSIS
ORN
ORN
RED
CAPACITOR
S
R
COMPRESSOR
INDOOR
UNIT
OUTDOOR
UNIT
THERMOSTAT
BLK
C
WHI
RED
FAN MOTOR
BLK
TCTC Service Manual 18/24UKHP-ES (EN) File No. SVM-01006
3-3. RAS-18UKHP-ES/RAS-18UAH-ES
COLOR IDENTIFICATION
:
BRW
:
RED
:
WHI
:
YEL
:
BLU
:
BLK
:
GRY
:
PNK
:
ORN
:
GRN&YEL
:GRN
SG01
DSA
R22
VARISTOR
T6.3A 250V
F01 FUSE
BLK
WHI
RED
GRN&YEL
BLK
P04
CN30
CN31
CN23
BROWN
RED
WHITE
YELLOW
BLUE
BLACK
GRAY
PINK
ORANGE
GREEN &
GREEN
YELLOW
R09
R21
LOUVER
MOTOR
BLU
6
6
IC04
L01
R01
DB01
C15
C01
MAIN P.C. BOARD
(MCC-821)
CN13
3
4
1
2
5
6
7 8 9
3
4
1
2
5
6
7 8 9
BLU
BLU
BLU
BLU
BLU
BLU
BLU
BLU
3
4
1
2
3
4
1
2
INFRARED RAYS RECEIVE
AND INDICATION PARTS
BLU
5
6
7 8 9
5
6
7 8 9
ORN
PNK
YEL
4
3
5
4
3
5
CN 07
CN03 CN01
10
10
WHI
10
CN25
10
FAN MOTOR
RED
BRW
6
2
1
6
2
1
+
C02
IC
IC01
2
1
2
1
THERMO
BLK
BLK
SENSOR
(TA)
DC MOTOR
4
3
5
4
3
5
CN 10
T01
C06
1
1
BLK
1
1
IC02
2
2
BLK
EXCHANGER
SENSOR
DC15V
DC0V
DC12V
DC7V
DC0V
HEAT
(TC)
POWER
TERMINAL
BLOCK
POWER SUPPLY
220-240V~ 50 Hz
L
i
N
BLK
RED
GRN&YEL
REDBLK
RED
WHI
PNK
COMPRESSOR
FERRITE CORE
CAPACITOR
S
R
INDOOR
TERMINAL
BLOCK
OUTDOOR
TERMINAL
BLOCK
11
121314
C
BLK
3
1
2
3
i
1
2
MAGNETIC RELAY
INDOOR
UNIT
OUTDOOR
UNIT
GRN&YEL
i
CHASSIS
15
16
A
B
CAPACITOR
RED
WHI
RED
FAN MOTOR
BLK
TRANSFORMER
COIL FOR
4 WAY VALVE
BLK
BLK
RED
RED
BLK
BLK
WHI
RED
GRY
BLU
YEL
BLK
BLK
1
3
1
3
1
3
5
7
9
1
3
1
313
1
313
MAIN P.C. BOARD (MCC-1275)
1
2
CN06
3
1
CN05
3
TNR
DSA
R74
1
F01
3
T5A 250VAC
5
CN01
7
9
1
3
5
CN04
CN11
CN02
CR11
CR12
BLK
1
1
RY07
RY05
CN03
TNR
R73
3
TNR R96
IC07
CN07
CN08
DISCHARGE
PIPE
SENSOR (TD)
BLK
1
1
2
3
3
BLK
BLK
1
1
2
3
3
BLK
HEAT
EXCHANGER
SENSOR (TE)
– 10 –
TCTC Service Manual 18/24UKHP-ES (EN) File No. SVM-01006
3-4. RAS-18UKP-ES/RAS-18UA-ES
COLOR IDENTIFICATION
GRN&YEL
BLK
P04
SG01
DSA
BLK
WHI
RED
GRN&YEL
CN30
CN31
CN27
11
3
:
BRW
:
RED
:
WHI
:
YEL
:
BLU
:
BLK
:
GRY
:
PNK
:
ORN
:
R22
VARISTOR
T6.3A 250V
F01 FUSE
BROWN
RED
WHITE
YELLOW
BLUE
BLACK
GRAY
PINK
ORANGE
GREEN &
GREENGRN
YELLOW
RY04
R09
R21
LOUVER
MOTOR
BLU
6
6
IC04
L01
R01
DB01
C15
C01
MAIN P.C. BOARD
(MCC-821)
CN13
3
4
1
2
5
6
7 8 9
3
4
1
2
5
6
789
BLU
BLU
BLU
BLU
BLU
BLU
BLU
BLU
3
4
1
2
3
4
1
2
INFRARED RAYS RECEIVE
AND INDICATION PARTS
BLU
5
6
7 8 9
5
6
7 8 9
PNK
YEL
RED
ORN
4
3
5
2
4
3
5
2
CN 07
CN03 CN01
1
10
1
10
WHI
BLK
10
CN25
10
FAN MOTOR
DC MOTOR
BRW
6
5
1
6
5
1
CN 10
+
C02
C06
IC
IC01
2
2
BLK
THERMO
SENSOR
(TA)
4
4
T01
3
3
1
1
BLK
2
2
BLK
1
1
DC15V
DC0V
DC12V
DC7V
DC0V
IC02
HEAT
EXCHANGER
SENSOR
(TC)
POWER
TERMINAL
BLOCK
BLK
POWER SUPPLY
220-240V~ 50Hz
INDOOR
TERMINAL
BLOCK
1
OUTDOOR
L
N
BLK
BLK
RED
GRN&YEL
RED
TERMINAL
BLOCK
MAGNETIC RELAY
11
121314
1
BLK
SPARK KILLER
RED
15
16
CAPACITOR CAPACITOR
RED
S
C
PNK
BLK
R
COMPRESSOR
3
2
INDOOR
UNIT
OUTDOOR
3
2
UNIT
GRN&YEL
CHASSIS
BLK
A
B
RED
WHIWHI
RED
FAN MOTOR
ORN
THERMOSTAT
ORN
BLK
– 11 –
TCTC Service Manual 18/24UKHP-ES (EN) File No. SVM-01006
4. SPECIFICATION OF ELECTRICAL PAR TS
4-1. Indoor Unit
RAS-24UKHP-ES,18UKHP-ES
No. Parts name Type Specifications
1 Fan motor (for indoor) ICF-340-30-1 DC 340V, 30W
Thermo sensor
2
(TA-sensor)
3 DC-DC transformer (T01) SWT-58A DC 390V, Secondary DC 15V, 12V, 7V
4 Microcomputer TMP87CM40AN
Heat exchanger sensor
5
(TC-sensor)
6 Line filter (L01) SS11V-R07190 19mH, AC0.7A
7 Diode (DB01) D3SBA60 4A, 600V
8 Capacitor (C02)
9 Fuse (F01) TSCR T6.3A, 250V
10 Power supply IC (IC01) MA8920 5A, 900V
11 Varistor (R21, R22) 15G561K 560V
12 Resistor (R01) RF-5TK4R7 4.7Ω, 5W
KMH450VNSN120M25C
——— 10kΩ at 25°C
——— 10kΩ at 25°C
120µF, 450V
13 Louver motor MP35EA12 Output (Rated) 2W,10poles, 1phase, DC 12V
4-2. Outdoor Unit
RAS-24UAH-ES
No. Parts name Type Specifications
Output (Rated) 2200W , 2poles , 1phase , 220 – 240V, 50Hz
1 Compressor PA290X3F-4MS
2 Fan motor (for outdoor) MMF-230-65F
3 Running capacitor (for fan motor) SK45FMP AC 450V, 3.5µF
Running capacitor
4
(for compressor)
5 Solenoid coil (for 4-way valve) VHV AC 220 – 240V
6 Thermo sensor TE / TD 10kW at 25°C / 50kΩ at 25°C
7 Magnetic switch CLK-35J 220 – 240V, 50Hz
SK42CMP45U1 AC 420V, 45µF
Winding resistance (Ω)
(at 20°C)
Output (Rated) 65W , 6poles ,1phase , 220 – 240V, 50Hz
Winding resistance (Ω)
(at 20°C)
Red-Black White-Black
1.07 2.20
Red-Black White-Black
71.2 139.0
8 Transformer FT67 220 – 240V
9 Microcomputer TMP47C840N
10 Varistor (R73, 74, 86) 15G471K 470V
11 Fuse (F01) MT3 T5A, 250V
– 12 –
TCTC Service Manual 18/24UKHP-ES (EN) File No. SVM-01006
4-3. Outdoor Unit
RAS-18UAH-ES
No. Parts name Type Specifications
Output (Rated) 1500W , 2poles , 1phase , 220 – 240V, 50Hz
1 Compressor PA225X3F-4L
2 Fan motor (for outdoor) HF-240-42A1
3 Running capacitor (for fan motor) SK45FMP02U2 AC 450V, 2µF
Running capacitor
4
(for compressor)
5 Solenoid coil (for 4-way valve) VHV AC 220 – 240V
6 Thermo sensor TE / TD 10kΩ at 25°C / 50kΩ at 25°C
7 Magnetic Relay VC20FA 220 – 240V, 50Hz, 1P1a
8 Transformer FT67 220 – 240V
9 Microcomputer TMP47C840N
10 Varistor (R73, 74, 86) 15G471K 470V
SK42CMP45U1 AC 420V, 45µF
Winding resistance (Ω)
(at 20°C)
Output (Rated) 42W , 6poles ,1phase , 220 – 240V, 50Hz
Winding resistance (Ω)
(at 20°C)
Red-Black White-Black
Red-Black White-Black
176.2 290.5
1.35 2.68
11 Fuse (F01) MT3 T5A, 250V
– 13 –
TCTC Service Manual 18/24UKHP-ES (EN) File No. SVM-01006
4-4. Indoor Unit
RAS-24UKP-ES, 18UKP-ES
No. Parts name Type Specifications
1 Fan motor (for indoor) ICF-340-30-1 DC 340V, 30W
Thermo sensor
2
(TA-sensor)
3 DC-DC transformer (T01) SWT-58A DC 390V, Secondary DC 15V, 12V, 7V
4 Microcomputer TMP87CM40AN
Heat exchanger sensor
5
(TC-sensor)
6 Line filter (L01) SS11V-R07190 19mH, AC 0.7A
7 Diode (DB01) D3SBA60 4A, 600V
——— 10kΩ at 25°C
——— 10kΩ at 25°C
8 Capacitor (C02)
9 Fuse (F01) TSCR T6.3A, 250V
Relay (for outdoor fan motor,
10
solenoid coil) (RY04)
11 Power supply IC (IC01) MA8920 5A, 900V
12 Varistor (R21, R22) 15G561K 560V
13 Resistor (R01) RF-5TK4R7 4.7Ω, 5W
14 Louver motor MP35EA12 Output (Rated) 2W,10poles, 1phase, DC 12V
KMH450VNSN120M25C
AJQ1341 Coil DC 12V, 33mA, Rated 1A, AC 250V
120µF, 450V
4-5. Outdoor Unit
RAS-24UA-ES
No. Parts name Type Specifications
Output (Rated) 2200W , 2poles , 1phase , 220 – 240V, 50Hz
1 Compressor PA290X3F-4MS
2 Fan motor (for outdoor)
2 Winding resistance (Ω)
MMF-230-65C
Winding resistance (Ω)
(at 20°C)
Output (Rated) 65W , 6poles ,1phase , 220 – 240V, 50Hz
(at 20°C)
Red-Black White-Black
1.07 2.20
Red-Black White-Black
71.2 139.0
3 Running capacitor (for fan motor) SK45FMP AC 450V, 3.5µF
Running capacitor
4
(for compressor)
5 Bimetal thermostat CS-7C Open 130 ± 5°C, Close 70 ± 10°C
6 Magnetic switch CLK-35J 220 – 240V, 50Hz
SK42CMP45U1 AC 420V, 45µF
– 14 –
TCTC Service Manual 18/24UKHP-ES (EN) File No. SVM-01006
4-6. Outdoor Unit
RAS-18UA-ES
No. Parts name Type Specifications
Output (Rated) 1500W, 2poles, 1phase, 220–240V, 50Hz
1 Compressor PA225X3F-4L
2 Fan motor (for outdoor) HF-240-42A
3 Running capacitor (for fan motor) SK45FMP02U2 AC 450V, 2µF
Running capacitor
4
(for compressor)
5 Bimetal thermostat CS-7C Open 130 ± 5°C, Close 70 ± 10°C
6 Magnetic Relay VC20FA 220 – 240V, 50Hz, 1P1a
SK42CMP45U1 AC 420V, 45µF
Winding resistance (Ω)
(at 20°C)
Output (Rated) 42W, 6poles,1phase, 220–240V, 50Hz
Winding resistance (Ω)
(at 20°C)
Red-Black White-Black
Red-Black White-Black
176.2 290.5
1.35 2.68
– 15 –
TCTC Service Manual 18/24UKHP-ES (EN) File No. SVM-01006
5. REFRIGERATION CYCLE DIA GRAM
5-1. RAS-24UKHP-ES/24UAH-ES
Indoor unit
Cooling
0.49m
(Connecting pipe)
ø12.7
O.D.:12.7mm O.D.:6.35mm
Cooling
Heating
Tank
Heating
P
Packed valve
(ø12.7)
Gas container connection (Reinstall etc.)
Heating
4-way valve
Muffler
Cooling
Compressor
PA290X3F-4MS
Heat exchanger
Cross flow fan
T1
0.39m
(Connecting pipe)
ø6.35
Packed valve
(ø6.35)
Capillary tube
ø2.0x700
Heating
Cooling
Note :
Condenser
Refrigerant
R-410A 1.6kg
Fan speed
(indoor)
Ambient temp.
conditions DB/WB
(°C)
Indoor Outdoor
50Hz
Cooling
Heating
Propeller fan
Outdoor unit
Standard pressure
P
(MPaG)
RAS-24UKHP-ES
Mark( )means check points of Gas Leak.
Surface temp.of heat
exchanger interchanging
pipe (°C)
T1
RAS-24UKHP-ES
Standard 2.7 43.0 High 20/– 7/6
Overload*1 3.1 ~ 4.0 52.0 ~ 59.0 Low 27/– 24/18
Low temperature 2.7 36.0 High 20/– –10/–10
Standard 0.9 11.0 High 27/19 35/24
Overload 0.8 12.0 High 32/23 43/26
Low temperature 0.5 1.0 Low 21/15 21/15
• Measure the heat exchanger temperature at the center of U-bend. (By means of TC sensor)
1 • During heating overload operation, a value for the high temperature limit control operation is included.
*
– 16 –
TCTC Service Manual 18/24UKHP-ES (EN) File No. SVM-01006
5-2. RAS-24UKP-ES/RAS-24UA-ES
Indoor unit
Cooling
0.49m
(Connecting pipe)
ø12.7
O.D.:12.7mm O.D.:6.35mm
Cooling
Tank
P
Packed valve
(ø12.7)
Gas container connection (Reinstall etc.)
Cooling
Compressor
PA290X3F-4MS
Heat exchanger
Cross flow fan
T1
0.39m
(Connecting pipe)
ø6.35
Packed valve
(ø6.35)
Capillary tube
ø2.0x600
Condenser
Refrigerant
R-410A 1.6kg
Fan speed
(indoor)
50Hz
Cooling
Propeller fan
Outdoor unit
Standard pressure
P
(MPaG)
RAS-24UKP-ES
Mark( )means check points of Gas Leak.
Surface temp. of heat
exchanger interchanging
pipe (°C)
T1
RAS-24UKP-ES
Standard 0.9 11.0 High 27/19 35/24
Cooling
Overload 0.8 12.0 High 32/23 43/26
Low temperature 0.5 1.0 Low 21/15 21/15
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
– 17 –
TCTC Service Manual 18/24UKHP-ES (EN) File No. SVM-01006
5-3. RAS-18UKHP-ES/RAS-18UAH-ES
Indoor unit
Cooling
0.39m
(Connecting pipe)
ø12.7
O.D.:12.7mm O.D.:6.35mm
Cooling
Heating
Heating
P
Packed valve
(ø12.7)
Heating
4-way valve
Cooling
Compressor
Muffler
PA225X3F-4L
Accumulator
Evaporator
Cross flow fan
T1
Capillary tube
ø1.7x700
0.49m
(Connecting pipe)
ø6.35
Packed valve
(ø6.35)
Capillary tube
ø1.0x1500
Heating
Cooling
Note :
Condenser
Refrigerant
R-410A 1.3 kg
Fan speed
(indoor)
Ambient temp.
conditions DB/WB
(°C)
Indoor Outdoor
50Hz
Cooling
Heating
Propeller fan
Outdoor unit
Standard pressure
P
(MPaG)
RAS-18UKHP-ES
Mark( )means check points of Gas Leak.
Surface temp. of heat
exchanger interchanging
pipe (°C)
T1
RAS-18UKHP-ES
Standard 2.7 45.0 High 20/– 7/6
Overload*1 3.0 ~ 3.8 49.0 ~ 58.0 Low 27/– 24/18
Low temperature 2.0 34.0 High 20/– –10/–10
Standard 0.9 10.0 High 27/19 35/24
Overload 1.0 15.0 High 32/23 43/26
Low temperature 0.6 1.0 Low 21/15 21/15
• Measure the heat exchanger temperature at the center of U-bend. (By means of TC sensor)
1 • During heating overload operation, a value for the high temperature limit control operation is included.
*
– 18 –
TCTC Service Manual 18/24UKHP-ES (EN) File No. SVM-01006
5-4. RAS-18UKP-ES/RAS-18UA-ES
Indoor unit
Cooling
0.39m
(Connecting pipe)
ø12.7
O.D.:12.7mm O.D.:6.35mm
Cooling
Heating
P
Packed valve
(ø12.7)
Heating
4-way valve
Cooling
Compressor
PA225X3F-4L
Accumulator
Accumulator
Evaporator
Cross flow fan
T1
0.49m
(Connecting pipe)
ø6.35
Packed valve
(ø6.35)
Muffler
Capillary tube
ø1.7x350
Condenser
Refrigerant
R-410A 1.2 kg
Fan speed
(indoor)
50Hz
Cooling
Propeller fan
Outdoor unit
Standard pressure
P
(MPaG)
RAS-18UKP-ES
Mark( )means check points of Gas Leak.
Surface temp. of heat
exchanger interchanging
pipe (°C)
T1
RAS-18UKP-ES
Standard 0.9 10.0 High 27/19 35/24
Cooling
Overload 1.0 13.0 High 32/23 43/26
Low temperature 0.6 2.0 Low 21/15 21/15
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
– 19 –
TCTC Service Manual 18/24UKHP-ES (EN) File No. SVM-01006
6. CONTROL BLOCK DIAGRAM
6-1. RAS-24UKHP-ES, 18UKHP-ES
Indoor Unit Control Panel
Heat Exchanger Sensor
Temperature Sensor
Functions
• Louver Control
• 3-minute Delay at Restart for Compressor
M.C.U.
Operation
Display
Timer
Display
Infrared Rays Signal Receiver
Infrared
Initiallizing Circuit
Rays
Clock Frequency
Oscillator Circuit
Power Supply
Remote
Circuit
Control
Noise Filter
From Outdoor Unit
REMOTE CONTROL
• Motor Revolution Control
• Processing
(Temperature Processing)
• Timer
• Serial Signal Communication
Louver ON/OFF Signal
Serial Signal Transmitter/Receiver
Serial Signal Communication
Remote Control
Louver Driver
Infrared Rays
Filter Sign
Display
PRE DEF.
Sign Display
Hi Power Sign
Display
Indoor Fan
Motor
Louver Motor
Operation (START/STOP)
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
Filter Reset
Sleep Timer Setting
– 20 –
TCTC Service Manual 18/24UKHP-ES (EN) File No. SVM-01006
6-2. RAS-24UKP-ES, 18UKP-ES
Indoor Unit Control Panel
Heat Exchanger Sensor
Functions
• Louver Control
M.C.U.
Operation
Display
Temperature Sensor
Infrared Rays Signal Receiver
Initiallizing Circuit
Infrared
Rays
Clock Frequency
Oscillator Circuit
Power Supply
Remote
Circuit
Control
Noise Filter
From Outdoor Unit
• 3-minute Delay at Restart for Compressor
• Motor Revolution Control
• Processing
(Temperature Processing)
• Timer
Outdoor unit
ON/OFF Signal
Relay Driver
Relay RY04
Outdoor Unit
Louver ON/OFF Signal
Louver Driver
Timer
Display
Filter Sign
Display
Fan Only
Sign Display
Hi Power Sign
Display
Indoor Fan
Motor
Louver Motor
REMOTE CONTROL
Infrared
Rays
Remote Control
Operation (START/STOP)
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
Filter Reset
Sleep Timer Setting
– 21 –
TCTC Service Manual 18/24UKHP-ES (EN) File No. SVM-01006
7. OPERATION DESCRIPTION
7-1. Outline of Air Conditioner Control
This is a fixed capacity type air conditioner , which uses a
DC motor for an indoor fan. The DC 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
• Themperature setting of the indoor heat e xchanger
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
• Tur ning 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) *Heating and Cooling Model only
Operations according to
the commands from the
indoor unit
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 [SET] button.
The louver position which is set by [SET] button is
stored in the microcomputer, and the louver is automatically set at the stored position for the next oper ation.
(2) Swing
If [SWING] button is pressed when the indoor unit is
in operation, the vertical air flow louver starts swinging. When [SWING] button is pressed again, it stops
swinging.
7-1-2. Indoor Fan Control (DC Fan Motor)
(1) The indoor fan is operated by the stepless speed
change DC motor.
(2) For air flow level, speed of the indoor fan motor is
controlled in five steps (LOW , LO W+, MED , MED+ and
HIGH). If A UTO mode is selected, the f an motor speed
is automatically controlled by the difference betw een
the preset temperature and the room termperature.
Table 7-1-1
RAS-24UKHP-ES RAS-18UKHP-ES
MODEL
Cooling HIGH 1350 950 1150 750
and MED 1150 750 1050 650
Fan only LOW 1000 600 900 530
Heating MED 1200 800 1100 700
MODEL RAS-24UKP-ES RAS-18UKP-ES
Cooling HIGH 1350 950 1150 750
and MED 1150 750 1050 650
Fan only LOW 1000 600 900 530
Motor speed Air flow level Motor speed Air flow level
(rpm) (m
HIGH 1350 950 1200 800
LOW 1050 650 950 570
LOW+=
MED+=
3
/h) (rpm) (m3/h)
LOW+MED
2
MED+HIGH
2
– 22 –
TCTC Service Manual 18/24UKHP-ES (EN) File No. SVM-01006
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