Toshiba RAS-M18SAH-E User manual

PRINTED IN JAPAN, Apr.,1998 ToMo
SERVICE MANUAL
FILE NO. A00-9805
AIR-CONDITIONER
MULTI SPLIT WALL TYPE
SUPPLEMENT
RAS-10SKH-E-1 x 2 / RAS-M18SAH-E
RAS-10SKH-E-1 x 2, RAS-13SKH-E / RAS-3M31SAH-E-1
RAS-10SKH-E-1 x 4 / RAS-4M36SAH-E
x 2 x 3 x 4

– 2 –
CONTENTS
1. DESCRIPTION .................................................................................................................3
2. SPECIFICATIONS............................................................................................................ 4
3. CONSTRUCTIONVIEWS .............................................................................................. 11
3-1. Indoor Unit ................................................................................................................................ 11
3-2. Outdoor Unit ............................................................................................................................. 12
4. REFRIGERANT CYCLE DIAGRAMS ............................................................................ 14
5. WIRING DIAGRAM ........................................................................................................ 17
6. SPECIFICATIONS OF ELECTRICAL PARTS ............................................................... 19
6-1. Indoor Unit ................................................................................................................................ 19
6-2. Outdoor Unit ............................................................................................................................. 20
7. MICROCOMPUTER BLOCK DIAGRAMS ..................................................................... 21
8. OPERATION DESCRIPTIONS....................................................................................... 23
8-1. FAN ONLY Operation ............................................................................................................... 23
8-2. COOL Operation....................................................................................................................... 23
8-3. DRY Operation.......................................................................................................................... 24
8-4. HEAT Operation........................................................................................................................ 25
8-5. AUTO Operation ....................................................................................................................... 26
8-6. ECONO. Mode ........................................................................................................................... 27
8-7. Current Limit Control............................................................................................................... 27
8-8. High-Temperature Limit Control............................................................................................. 28
8-9. Low-Temperature Limit Control (Cooling Operation) .......................................................... 28
8-10. Cool Airflow Prevention Control (Heating Operation) ......................................................... 29
8-11. Defrost Operation..................................................................................................................... 29
8-12. Auto Restart Function ............................................................................................................. 31
8-13. Operation Control of Following Outdoor Unit....................................................................... 33
9. TROUBLESHOOTING CHART...................................................................................... 34
9-1. What to be Prechecked First................................................................................................... 34
9-2. Primary Judgement ofTrouble Sources ................................................................................ 36
9-3. Troubleshooting Flowcharts ................................................................................................... 40
9-4. How to Check the Remote Control (Including the Indoor P.C. Board) ............................... 47
10. PART REPLACEMENT.................................................................................................. 52
10-1. Indoor Unit ................................................................................................................................ 52
10-2. Microcomputer ......................................................................................................................... 54
10-3. Outdoor Unit ............................................................................................................................. 55
11. CAUTIONS ON REPLACEMENT OF P.C. BOARD ASSEMBLY................................... 64
12. EXPLODEDVIEWS AND PARTS LIST ......................................................................... 65
12-1. Indoor Unit (1)........................................................................................................................... 65
Indoor Unit (2)........................................................................................................................... 66
Indoor Unit (3)........................................................................................................................... 67
12-2. Outdoor Unit ............................................................................................................................. 68

– 3 –
1. DESCRIPTION
RAS-M18SAH-E
RAS-M18SAH-E can be used alone with two indoor units RAS-10SKH-E-1.
RAS-3M31SAH-E-1
in a combination of two outdoor units
RAS-13SAH-E (upper unit, one compressor)
RAS-M18SAH-E (lower unit, two compressors)
The upper unit can be used with one indoor unit RAS-13SKH-E and the lower
unit with two indoor units RAS-10SKH-E-1.
RAS-4M36SAH-E
The lower unit RAS-M18SAH-E can be used as a double decker under the
combination name RAS-4M36SAH-E with four indoor units RAS-10SKH-E-1.

– 4 –
2. SPECIFICATIONS
RAS-10SKH-E-1 x 2 / RAS-M18SAH-E
Model
Item
Capacity *1 kW
Phase
Power source V
Hz
Power consumption kW
Power factor %
Running current A
Indoor/Outdoor
Starting current A
Moisture removal lit/h
Noise Indoor (H/M/L) dB
Outdoor (220/230/240V) 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 (One way) m *2
Maximum height difference
Indoor unit m
Outdoor unit
Condensate drain pipe Outer diameter mm
INDOOR UNIT Height mm
Dimensions 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
Dimensions Width mm
Depth mm
Net weight kg
Condenser type
Outdoor fan type
Airflow volume (220/230/240V) m3/h
Fan motor output W
Compressor Model
Output W
Safety device
Auto louver
Usable outdoor temperature range °C
RAS-10SKH-E-1 x 2 / RAS-M18SAH-E
Cooling Heating
220V 230V 240V 220V 230V 240V
5,0 5,0 5,0 5,6 5,6 5,6
Single
220/230/240
50
2,04/2,10/2,18 1,78/1,86/1,96
95/92/89 94/91/87
220V 230V 240V 220V 230V 240V
0,22/9,54 0,22/9,7 0,22/9,96 0,22/8,38 0,22/8,66 0,22/9,16
19
1,2
41/36/31
52/53/54
R-22
1,4 (0,7+0,7)
Capillary tube
9,52
Flare connection
6,35
Flare connection
15
5
16
RAS-10SKH-E-1
265
790
174
8
Finned tube
Cross flow fan
600
500
400
19
Polypropylene net filter (Washable)
RAS-M18SAH-E
538
830
300
55
Finned tube
Propeller
1830/1920/2010
28
PH120T1-4C x 2
750W x 2
Fuse, Overload relay
Yes
21 ~ 43 – 5 ~ 21
Specifications are subject to change without notice.

– 5 –
RAS-10SKH-E-1 / RAS-M18SAH-E
Cooling Heating
220V 230V 240V 220V 230V 240V
2,50 2,50 2,50 2,80 2,80 2,80
Single
220/230/240
50
1,02/1,05/1,09 0,89/0,93/0,98
95/92/89 94/91/87
220V 230V 240V 220V 230V 240V
0,11/4,77 0,11/4,85 0,11/4,98 0,11/4,19 0,11/4,33 0,11/4,58
Model
Item
Capacity *1 kW
Phase
Power source V
Hz
Power consumption kW
Power factor %
Running current A
Indoor/Outdoor

– 6 –
Model
Item
Capacity *1 kW
Phase
Power source V
Hz
Power consumption kW
Power factor %
Running current A
Indoor/Outdoor
Starting current A
Moisture removal lit/h
Noise Indoor (H/M/L) dB
Outdoor (220/230/240V) 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 (One way) m *2
Maximum height difference
Indoor unit m
Outdoor unit
Condensate drain pipe Outer diameter mm
INDOOR UNIT Height mm
Dimensions 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
Dimensions Width mm
Depth mm
Net weight kg
Condenser type
Outdoor fan type
Airflow volume (220/230/240V) m3/h
Fan motor output W
Compressor Model
Output W
Safety device
Auto louver
Usable outdoor temperature range °C
RAS-10SKH-E-1 x 2, RAS-13SKH-E / RAS-3M31SAH-E-1
Specifications are subject to change without notice.
RAS-10SKH-E-1 x 2, RAS-13SKH-E / RAS-3M31SAH-E-1
Cooling Heating
220V 230V 240V 220V 230V 240V
8,45 8,50 8,50 9,60 9,65 9,70
Single
220/230/240
50
3,30/3,38/3,48 2,97/3,09/3,23
96/93/90 94/93/89
220V 230V 240V 220V 230V 240V
0,37/15,24 0,37/15,36 0,37/15,71 0,37/13,92 0,37/14,14 0,37/14,70
19+19+25
1,2+1,2+2,0
RAS-10SKH-E-1 : 41/36/31 RAS-13SKH-E : 44/39/36
52/53/54
R-22
2,28 (0,7+0,7+0,88)
Capillary tube
RAS-10SKH-E-1 : 9,52 RAS-13SKH-E : 12,7
Flare connection
6,35
Flare connection
15
RAS-10SKH-E-1 : 5 RAS-13SKH-E : 6
16
RAS-10SKH-E-1 RAS-13SKH-E
265
790
174
8
Finned tube
Cross flow fan
600 650
500 560
400 510
19
Polypropylene net filter (Washable)
RAS-3M31SAH-E-1
1125
830
300
106
Finned tube
Propeller
1830/1920/2010
28
PH120T1-4C x 2 + PH170T2-4L2
750W x 2 + 1100W x 1
Fuse, Overload relay
Yes
21 ~ 43 – 5 ~ 21

– 7 –
RAS-10SKH-E-1, RAS-13SKH-E / RAS-3M31SAH-E-1
Cooling Heating
220V 230V 240V 220V 230V 240V
5,95 6,00 6,00 6,80 6,85 6,90
Single
220/230/240
50
2,28/2,33/2,39 2,08/2,16/2,25
97/94/91 95/93/90
220V 230V 240V 220V 230V 240V
0,26/10,47 0,26/10,51 0,26/10,73 0,26/9,73 0,26/9,81 0,26/10,12
RAS-10SKH-E-1 x 2 / RAS-3M31SAH-E-1
Cooling Heating
220V 230V 240V 220V 230V 240V
5,0 5,0 5,0 5,6 5,6 5,6
Single
220/230/240
50
2,04/2,10/2,18 1,78/1,86/1,96
95/92/89 94/91/87
220V 230V 240V 220V 230V 240V
0,22/9,54 0,22/9,70 0,22/9,96 0,22/8,38 0,22/8,66 0,22/9,16
RAS-13SKH-E / RAS-3M31SAH-E-1
Cooling Heating
220V 230V 240V 220V 230V 240V
3,45 3,50 3,50 4,00 4,05 4,10
Single
220/230/240
50
1,26/1,28/1,30 1,19/1,23/1,27
98/96/92 95/95/93
220V 230V 240V 220V 230V 240V
0,15/5,70 0,15/5,66 0,15/5,75 0,15/5,54 0,15/5,48 0,15/5,54
RAS-10SKH-E-1 / RAS-3M31SAH-E-1
Cooling Heating
220V 230V 240V 220V 230V 240V
2,50 2,50 2,50 2,80 2,80 2,80
Single
220/230/240
50
1,02/1,05/1,09 0,89/0,93/0,98
95/92/89 94/91/87
220V 230V 240V 220V 230V 240V
0,11/4,77 0,11/4,85 0,11/4,98 0,11/4,19 0,11/4,33 0,11/4,58
Model
Item
Capacity *1 kW
Phase
Power source V
Hz
Power consumption kW
Power factor %
Running current A
Indoor/Outdoor
Model
Item
Capacity *1 kW
Phase
Power source V
Hz
Power consumption kW
Power factor %
Running current A
Indoor/Outdoor
Model
Item
Capacity *1 kW
Phase
Power source V
Hz
Power consumption kW
Power factor %
Running current A
Indoor/Outdoor
Model
Item
Capacity *1 kW
Phase
Power source V
Hz
Power consumption kW
Power factor %
Running current A
Indoor/Outdoor

– 8 –
Specifications are subject to change without notice.
Model
Item
Capacity *1 kW
Phase
Power source V
Hz
Power consumption kW
Power factor %
Running current A
Indoor/Outdoor
Starting current A
Moisture removal lit/h
Noise Indoor (H/M/L) dB
Outdoor (220/230/240V) 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 (One way) m *2
Maximum height difference
Indoor unit m
Outdoor unit
Condensate drain pipe Outer diameter mm
INDOOR UNIT Height mm
Dimensions 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
Dimensions Width mm
Depth mm
Net weight kg
Condenser type
Outdoor fan type
Airflow volume (220/230/240V) m3/h
Fan motor output W
Compressor Model
Output W
Safety device
Auto louver
Usable outdoor temperature range °C
RAS-10SKH-E-1 x 4 / RAS-4M36SAH-E
Cooling Heating
220V 230V 240V 220V 230V 240V
10,0 10,0 10,0 11,2 11,2 11,2
Single
220/230/240
50
4,08/4,20/4,36 3,56/3,72/3,92
95/92/89 94/91/87
220V 230V 240V 220V 230V 240V
0,44/19,08 0,44/19,4 0,44/19,92 0,44/16,76 0,44/17,32 0,44/18,32
19+19+19+19
1,2+1,2+1,2+1,2
41/36/31
54/55/56 55/56/57
R-22
2,8 (0,7+0,7+0,7+0,7)
Capillary tube
9,52
Flare connection
6,35
Flare connection
15
5
16
RAS-10SKH-E-1
265
790
174
8
Finned tube
Cross flow fan
600
500
400
19
Polypropylene net filter (Washable)
RAS-4M36SAH-E
1125
830
300
119
Finned tube
Propeller
1830/1920/2010
28
PH120T1-4C
750W x 4
Fuse, Overload relay
Yes
21 ~ 43 – 5 ~ 21
RAS-10SKH-E-1 x 4 / RAS-4M36SAH-E

– 9 –
RAS-10SKH-E-1 x 3 / RAS-4M36SAH-E
Cooling Heating
220V 230V 240V 220V 230V 240V
7,50 7,50 7,50 8,40 8,40 8,40
Single
220/230/240
50
3,06/3,15/3,27 2,67/2,79/2,94
97/94/91 95/93/90
220V 230V 240V 220V 230V 240V
0,33/14,31 0,33/14,55 0,33/14,94 0,33/12,57 0,33/12,99 0,33/13,74
RAS-10SKH-E-1 x 2 / RAS-M36SAH-E
Cooling Heating
220V 230V 240V 220V 230V 240V
5,0 5,0 5,0 5,6 5,6 5,6
Single
220/230/240
50
2,04/2,10/2,18 1,78/1,86/1,96
95/92/89 94/91/87
220V 230V 240V 220V 230V 240V
0,22/9,54 0,22/9,70 0,22/9,96 0,22/8,38 0,22/8,66 0,22/9,16
RAS-10SKH-E-1 / RAS-4M36SAH-E
Cooling Heating
220V 230V 240V 220V 230V 240V
2,50 2,50 2,50 2,80 2,80 2,80
Single
220/230/240
50
1,02/1,05/1,09 0,89/0,93/0,98
95/92/89 94/91/87
220V 230V 240V 220V 230V 240V
0,11/4,77 0,11/4,85 0,11/4,98 0,11/4,19 0,11/4,33 0,11/4,58
Model
Item
Capacity *1 kW
Phase
Power source V
Hz
Power consumption kW
Power factor %
Running current A
Indoor/Outdoor
Model
Item
Capacity *1 kW
Phase
Power source V
Hz
Power consumption kW
Power factor %
Running current A
Indoor/Outdoor
Model
Item
Capacity *1 kW
Phase
Power source V
Hz
Power consumption kW
Power factor %
Running current A
Indoor/Outdoorr

– 10 –
Cooling
27°C
19°C
35°C
24°C
Heating
20°C
—
7°C
6°C
JIS C9612-1994Condition
(DB)
(WB)
(DB)
(WB)
Temperature
Indoor unit inlet air temperature
Outdoor unit inlet air temperature
Notes : *2
RAS-13SKH-E /RAS-3M31SAH-E-1
• 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.
RAS-10SKH-E-1 / RAS-M18SAH-E,
RAS-10SKH-E-1 / RAS-3M31SAH-E-1,
RAS-10SKH-E-1 / RAS-4M36SAH-E
• This air conditioner accepts a connection piping length of up to 15m and a head of up to 5m.
• There is no need to add the refrigerant as long as the total length of the connection piping is up to 10m.
• There is need to add the refrigerant 20g/m as long as the each length of the connection piping is up to 11m to
15m.
Note : *1
• Capacity is based on the following temperature conditions.