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Toshiba RAS-18UAH-E4 User Manual
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FILE NO. SVM-05016-1
SER
VICE MANU
AL
AIR CONDITIONER
SPLIT W
ALL
TYPE
RAS-24NKHD-E4 / RAS-24
U
AH-E4
RAS-18NKHD-E4 / RAS-18
U
AH-E4
RAS-24NKD-E4 / RAS-24
U
A-E4
RAS-18NKD-E4 / RAS-18UA-E4
RAS-24NKD-AR4 / RAS-24
U
A-AR4
RAS-18N
KD-AR4 / RAS-18UA-AR4
RAS-24NKDX4 / RAS-24UAX4
RAS-18NKDX4 / RAS-18
U
AX4
RAS-24NKDX4-T / RAS-24UAX
3
-T1
RAS-18NKDX4-T2 / RAS-18
U
AX4-T2
18 Class
(Heat pump model)
24 Class
18 Class
(Cooling only model)
June
200
5
2
Table of Contents
Default Chapter
1
Air Conditioner
1
Service Manual
1
Table of Contents
2
1 Specifications
4
2 Construction Views
7
Indoor Unit
7
Outdoor Unit (RAS-24UAH-E4, RAS-24UA-E4, RAS-24UAX4, RAS-24UA-AR4, RAS-24UAX3-T1, RAS-18UAX4-T2)
8
Outdoor Unit (RAS-18UAH-E4)
8
Outdoor Unit (RAS-18UA-E4, RAS-18UAX4, RAS-18UA-AR4)
10
3 Wiring Diagram
11
Ras-24Nkhd-E4 / Ras-24Uah-E4
11
Power Supply
11
Ras-18Nkhd-E4 / Ras-18Uah-E4
12
Ras-24Nkd-E4 / Ras-24Ua-E4, Ras-24Nkd-Ar4 / Ras-24Ua-Ar4
13
Ras-24Nkdx4 / Ras-24Uax4
13
Ras-24Nkdx4-T / Ras-24Uax3-T1
14
Ras-18Nkd-E4 / Ras-18Ua-E4, Ras-18Nkdx4 / Ras-18Uax4 Ras-18Nkd-Ar4 / Ras-18Ua-Ar4
15
Ras-18Nkdx4-T2 / Ras-18Uax4-T2
16
4 Specification of Electrical Parts
17
Outdoor Unit (RAS-24UAH-E4)
17
Indoor Unit (Ras-24Nkhd-E4, Ras-18Nkhd-E)
17
Outdoor Unit (RAS-18UAH-E4)
18
Indoor Unit (RAS-24NKD-E4, RAS-24NKDX4, RAS-24NKD-AR4, RAS-24NKDX4-T, RAS-18NKD-E4, RAS-18NKDX4, RAS-18NKD-AR4, RAS-18NKDX4-T2)
18
Outdoor Unit (RAS-24UA-E4, RAS-24UAX4, RAS-24UAX3-T1)
19
Outdoor Unit (RAS-24UA-AR4)
19
Outdoor Unit (RAS-18UAX4, RAS-18UA-E4)
20
Outdoor Unit (RAS-18UA-AR4)
20
Outdoor Unit (RAS-18UAX4-T2)
21
5 Refrigeration Cycle Diagram
22
Ras-24Nkhd-E4 / Ras-24Uah-E4
22
Ras-18Nkhd-E4 / Ras-18Uah-E4
23
Ras-24Nkd-E4 / Ras-24Ua-E4
24
Ras-18Nkd-E4 / Ras-18Ua-E4
25
Ras-24Nkd-Ar4 / Ras-24Ua-Ar4
27
Ras-18Nkdx4-T2 / Ras-18Uax4-T2
28
6 Control Block Diagram
29
Ras-24Nkhd-E4, Ras-18Nkhd-E4
29
Ras-18Nkd-E4 / Ras-18Ua-E4, Ras-18Nkdx4 / Ras-18Uax4 Ras-18Nkd-Ar4 / Ras-18Ua-Ar4, Ras-18Nkdx4-T2 / Ras-18Uax4-T2
30
Ras-24Dkd-E4 / Ras-24Ua-E4, Ras-24Nkdx4 / Ras-24Uax4
30
Ras-24Nkd-Ar4 / Ras-24Ua-Ar4, Ras-24Nkdx4-T / Ras-24Uax3-T1
30
7 Operation Description
31
Outline of Air Conditioner Control
31
Description of Operation Circuit
32
Cooling Operation
34
Fan Only Operation
34
Auto Restart Function
39
Filter Check Lamp
40
Quiet Mode
42
8 Installation Procedure
43
Safety Cautions
43
Installation Diagram of Indoor and Outdoor Units
45
Outdoor Unit
53
9 Troubleshooting Chart
58
Troubleshooting Procedure
58
Basic Check Items
58
Primary Judgement
59
How to Diagnose Faulty Parts
62
Troubleshooting for Indoor Unit
66
Troubleshooting for Wiring (Interconnect Cable and Serial Signal Wire)
72
Troubleshooting for Air Purifier and Minus Ion
73
Troubleshooting for P.C. Board
75
Troubleshooting for Remote Control
77
Part Replacement
78
Outdoor Unit (Ras-24Uah-E4, Ras-24Ua-E4, Ras-24Uax4, Ras-24Ua-Ar)
80
Ras-24Uax3-T1, Ras-18Uax4-T
80
11 Exploded Views and Parts List
83
Outdoor Unit (Ras-18Ua-E4, Ras-18Uax)
90
4
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Toshiba RAS-18UAH-E4 Specifications
General
Power Supply
220-240V, 50Hz
Refrigerant
R410A
Weight (Outdoor Unit)
32 kg
Type
Split System
Outdoor Unit Dimensions (W x H x D)
780 x 540 mm
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