Toshiba RAS-18YKH-E User manual

SERVICE MANUAL
FILE NO. A00-0001
AIR-CONDITIONER
SUPPLEMENT
SPLIT WALL TYPE
PRINTED IN THAILAND, Apr.,2000
RAS-18YKH-E / RAS-18YAH-E
RAS-18YKH-A / RAS-18YAH-A

– 2 –
CONTENTS
1. SPECIFICATIONS....................................................................................... 3
2. CONSTRUCTION VIEWS............................................................................ 5
3. WIRING DIAGRAM ..................................................................................... 7
4. SPECIFICATIONS OF ELECTRICAL PARTS ............................................ 8
5. REFRIGERANT CYCLE DIAGRAM............................................................ 9
6. CONTROL BLOCK DIAGRAM ................................................................. 10
7. OPERATION DESCRIPTION .................................................................... 12
8. INSTALLATION PROCEDURE ................................................................. 16
9. TROUBLESHOOTING CHART ................................................................. 20
10. EXPLODED VIEWS AND PARTS LIST .................................................... 37

– 3 –
Model
Item
Capacity *1(kW)
Phase
Power source (V)
(Hz)
Power consumption (kW)
Power factor (%)
Running current Indoor (A)
Outdoor (A)
Starting current (A)
Moisture removal (lit/h)
Noise Indoor (H/M/L) (dB)
Outdoor (dB)
Refrigerant Name of refrigerant
Rated volume (kg)
Refrigerant control Gas side size (mm)
Connection type
Liquid side size (mm)
Interconnection pipe Connection type
Maximum length (of one way) *2(m)
Maximum height difference
Indoor unit (m)
Outdoor unit
Codensate drain pipe Outer diameter (mm)
INDOOR UNIT Height (mm)
Dimension Width (mm)
Depth (mm)
Net weight (kg)
Evaporator type
Indoor fan type High fan (m³/h)
Air volume Medium fan (m³/h)
Low fan (m³/h)
Fan motor output (W)
Air filter
OUTDOOR UNIT Height (mm)
Dimension Width (mm)
Depth (mm)
Net weight (kg)
Condenser type
Outdoor fan type
Airflow volume (m³/h)
Fan motor output (W)
Compressor Model
Output (W)
Safety device
Auto louver
Usable outdoor temperature range (°C)
1. SPECIFICATIONS
Specifications are subject to change without notice.
RAS-18YKH-E, RAS-18YAH-E RAS-18YKH-A, RAS-18YAH-A
Cooling Heating Cooling Heating
220–240V 240V
5,0 6,35–6,50 5,0 6,50
Single
220–240V 240V
50
2,03–2,20 2,33–2,52 2,20 2,52
91–81 92–85 81 85
0,28–0,30 0,28–0,30 0,30 0,30
9,82–11,00 11,22–12,10 11,00 12,10
60
2,0
44/41/38
54–56 55–57 56 57
R-22
1,45
Capillary tube
12,7
Flare connection
6,35
Flare connection
15
6
16
RAS-18YKH-E / RAS-18YKH-A
298
1050
180
12
Finned tube
Cross flow fan
750
650
550
31
Polypropylene net filter (Washable)
RAS-18YAH-E RAS-18YAH-A
690
880
310
65
Finned tube
Propeller
220V 240V 240V
3380 3560 3560
65
PH280X3-4MS
2000
Fuse, overload relay
Yes
11 to 43 –10 to 21 11 to 43 –10 to 21
↑
↓

– 4 –
Note : *1
• Capacity is based on the following temperature conditions.
Condition
Temperature
Indoor unit inlet air temperature (DB)
(WB)
Outdoor unit inlet air temperature (DB)
(WB)
JIS C9612-1994
Cooling Heating
27°C 20°C
19°C —
35°C 7°C
24°C 6°C
Notes : *2 CHARGELESS
• No additional refrigerant required.
• This air conditioner accepts a connection piping length of up to 15m and a head of up to 6m.
• There is no need to add the refrigerant as long as the total length of the connection piping is up to 15m.

– 5 –
2. CONSTRUCTION VIEWS
2-1. Indoor Unit
RAS-18YKH-E, RAS-18YKH-A
1050
1040
261 264 274 251
180
30
123
990
274 264
30
123402402
1050
298 248
30 40 10
15 40 20
298
47
450
59.6 5
55 16
112.8 136
Deodorizing filter
Air inlet
Indoor heat exchanger
Dust collecting filter
Air filter
Power cord (1,7m)
Air outlet
Hanger
Front panel
Rear plate
Hanger
Auxiliary pipe (0,49m)
Flare Ø6,35
Auxiliary pipe (0,39m)
Flare Ø12,7
Drain hose
0,60m
Anchor bolt hole
Ø8 ~ Ø10
Anchor bolt hole
Ø6
Detail of installing dimensions of the indoor unit
Minimum distance
from wall
Minimum distance
from wall
Minimum distance
from ceiling
Hanger
Ø65
Piping hole
Installation plate
Center line
Ø65
Piping hole
Wireless
remote control
Remote control holder
44 or more
80 or more 130 or more

– 6 –
2-2. Outdoor Unit
RAS-18YAH-E, RAS-18YAH-A
27
340
Ø12 x 18 hole
600
Detail Drawing
50
A
74 12
88
340
68 52
100 or more
100 or more 600 or more
600 or more
Mounting dimension of anchor bolt
600
Air inlet
Air inlet
Air outlet 4 x Ø12 x 18 for Ø8–Ø10 anchor bolt
Handle
Handle
690
340
63,8
880
310
340 (pitch)
364 12
23
Electric
Parts cover
Liquid side
(Flare Ø6,35)
Gas side
(Flare Ø15,88)
Service port
120
A
140
600
4–Ø12 x 18 hole
(for Ø8–Ø10 anchor bolt)
Ø25 Drain outlet

– 7 –
COLOR
IDENTIFICATION
BRW : BROWN
RED : RED
WHI : WHITE
YEL : YELLOW
BLU : BLUE
BLK : BLACK
GRY : GRAY
PNK : PINK
ORN : ORANGE
GRN &YEL :GREEN &
ORANGE
Buzzer
parts
Fan motor
Thermal fuse
164˚C
Indication parts
Infrared rays
receive parts
654321
6 5 4 3 2 1
4 5 6 7 8 9321 4 5 6 7 8 9321
4 5 6 7 8 9321 4 5 6 7 8 9321
Louver
motor
BLU
PNK
YEL
WHI
RED
BLK
WHI
BRW
GRY
YEL
Transformer
MCC-629
T01
RED
CN32
C26
Running
capacity
CN13
CN10CN24
C27
C28
TNR
R106
F01 Fuse
T5A
250V
L01
Filter
CN15
CN16 CN25
TNR R98
TRIAC D04
CR01
CN07
TH01
PTH CN12
CN01
CN22CN05CN04
CN26
CN17
CN03
Grand
terminal
CN30
PJ18
CN11
CN11
CN33
GRY
BLU
BLK
BLK
BLU
YEL
RED
WHI
BLK
BLK
WHI
RED
GRY
BLU
YEL
BLK
Coil for
4-way valve
BLK
BLU
ORN
RED
BRW
WHI
WHI BLU BLU
5
3
11 22 33
1
5
3
1
33
1
3
1
3
1
1
2
3
1
31
33
211
Switch parts
12 3
123
123
1 2 3
1 2 3
3 5
53
1
1
2
1
321
31 2 3
1 2 3
1 2
1 2
1 2
Heat exchanger
sensor
Discharge
temperature
sensor (TD)
21 21
Thetmo.
sensor
21 21
Thermal fuse
77˚C
Transformer
Indoor terminal block
Outdoor terminal block
Power supply
18YAH-E : 220–240V ~, 50Hz
18YAH-A : 240V ~, 50Hz
Ferrite core
GRN &YEL GRN &YEL
Chassis
BLK RED
RED
BLK
BLK
BLK RED
Crank case
heater Fuse
3A
Fuse
3A
RED
WHI
BLK BLK
PNK WHI RED
RED
Capacitor Capacitor
Compressor
Magnetic
relay
Fan motor
21 21
ORN
RED
ORN
BLK BLK BLK BLK
WHI
BLU
2
1 1
3 3
2
1 1
3 3
1 1
3 3
CN02
CN03
CN11
CN04
CN01
CN05
CN06 MAIN P.C. BOARD (MCC-1275)
MAIN P.C. BOARD (MCC-1293)
CR12
RY05
RY07
TNR R96
IC07
CR11
1 1
3 3
5 5
7 7
9 9
1 1
3 3
5
1 1
1 1
2 2
3 3
1 1
3 3
1 1
3
BLK
BLK
Heat
exchanger
sensor (TE)
2
1 1
3 3
L
TNR
R73
TNR R74 DSA
T5A, 250V AC
52C
6T3
5L3
4T2
3L2
2T1
1L1
A2
A1
22
21
BRW BRW BRW BRW BRW BRW BRW BRW
BLK WHI
GRN
&
YEL
RED
IC
WHI
BLK
N
3. WIRING DIAGRAM

– 8 –
No. Parts name Type Specifications
Output (Rated) 31W, 2poles, DC35V, 19W
1 Fan motor (for indoor) AFP-220-31-4B Winding resistance (Ω)Red-Black White-Black
(at 20°C) 267,8 147,7
2 Thermo. sensor (TA-sensor) (microprocessor) 10kΩat 25°C
3 Transformer (T01) TTZ MCC-629
4 Microcomputer TMP87CK40AN
5 Heat exchanger sensor (microprocessor) 10kΩat 25°C
(TC-sensor)
6 Line filter (L01) 25mH, AC 0,7A
7 Diode (DB01) KBP06M
8 Capacitor (C01) ECAIEHG222E 220µF, 25V
9 Fuse (F01) MT3 T5A, 250V
10 Varistor (R98, R106) 15G431K 430V
11 PTH (TH01) 82Ω
12 Louver motor MP35EA7 Output (Rated) 2W, 10poles, 1phase DC12V
No. Parts name Type Specifications
Output (Rated) 2000W, 2poles, 1phase, 220–240V, 50Hz
1 Compressor PH280X3-4MS Winding resistance (Ω)Red-Black White-Black
(at 20°C) 1,35 2,68
Output (Rated) 65W, 6poles, 1phase, 220–240V, 50Hz
2 Fan motor (for outdoor) MMF-230-65C Winding resistance (Ω)Red-Black White-Black
(at 20°C) 71,2 139,0
3 Running capacitor (for fan motor) SK45FMP AC 450V, 3,5µF
4 Running capacitor SK42CMP45U1 AC 420V, 45µF
(for compressor)
5 Solenoid coil (for 4-way valve) LB60012 AC 200/240V
6 Thermo. sensor TE, TD 10kΩat 25°C
7 Case heater 240V, 28W
8 Magnetic switch FC2S 3a1b
9 Transformer FT67 220–240V
10 Microcomputer TMP470840
11 Varistor (R73, 74, 86) 15G471K 470V
12 Fuse (F01) MT3 T5A, 250V
4. SPECIFICATIONS OF ELECTRICAL PARTS
4-1. Indoor Unit
RAS-18YKH-E, RAS-18YKH-A
4-2. Outdoor Unit
RAS-18YAH-E, RAS-18YAH-A

– 9 –
Mark ( ) means check points of Gas Leak
Cooling
Heating
INDOOR UNIT A
T1
Indoor heat
exchanger
Cross flow fan
P
Accumulator
Compressor
PH280X3-4MS
Packed valve
(Ø12,7)
Gas container connection (Reinstall etc.)
(Note)
Maximum pipe length is 15m
Maximum pipe head is 6m
Packed valve
(Ø6,35)
Capillary tube
Ø1,2 x 700
Capillary tube
Ø1,7 x 600
Liquid tank
550cc
Heating
Heating
4-way valve
Cooling
Cooling
Heating
Cooling
O.D. : 12,7mm O.D. : 6,35mm
Outdoor heat exchanger
Propeller fan Refrigerant
R-22 1,45kg
OUTDOOR UNIT
0,39m
(Connecting pipe)
Ø12,7
0,49m
(Connecting pipe)
Ø6,35
5. REFRIGERANT CYCLE DIAGRAM
Standard pressure Surface temp. of heat
50Hz P exchanger interchanging Fan speed
(kg/cm²G) pipe T1 (°C) (indoor)
18YAH-E, A 18YKH-E, A
Standard 21,0 53,0 High
Heating High temperature*1 20,5 to 25,5 52,0 to 61,0 Low
Low temperature 17,0 45,0 High
Standard 3,0 9,0 High
Cooling High temperature 3,5 11,0 High
Low temperature 2,5 1,5 Low
Ambient temp.
conditions DB/WB
(°C)
Indoor Outdoor
20/– 7/6
27/– 21/15
20/– –10/–10
27/19 35/24
32/23 43/26
21/15 21/15
Note :
• Measure the heat exchanger temperature at the center of U-bend.(By means ofTC sensor.)
*1 • During heating overload, the high temperature limit control operation is included.

– 10 –
Infrared Rays Signal Receiver
Functions
ECONO.
Louver Direction Setting
Louver AUTO Swing
OFF TIMER Setting
ON TIMER Setting
Fan Speed Selection
Thermo. Setting
Operation Mode Selection
AUTO, COOL, DRY, FAN ONLY
Operation (START/STOP)
Clock Frequency
Oscillator Circuit
8MHz
Heat Exchanger Sensor
Infrared
Rays Initializing Circuit
M.C.U
Indoor Unit Control Panel
From Outdoor Unit
CLOCK FREQUENCY 36,864kHz
Remote Control
Operation
Display
Timer
Display
ECONO.
Sign Display
PRE DEF.
Sign Display
Indoor
Fan Motor
Louver ON/OFF Signal
Louver Driver Louver
Motor
Power Supply
Circuit
Temperature Sensor • Louver Control
• 3-minute Delay at Restart for Compressor
• Motor Revolution Control
• Processing
(Temperature Processing)
• Timer
• Serial Signal Communication
Serial Signal Transmitter/Receiver
Transformer Serial Signal Communication (outdoor unit)
Photo Triac
Noise Filter
6. CONTROL BLOCK DIAGRAM
6-1. Indoor Unit