Toshiba RAS-18NKHD-E5 User manual

FILE NO. SVM-06005
SERVICE MANUAL
AIR CONDITIONER
24 Class18 Class
May, 2006
RAS-18NKHD-E5 / RAS-18NAH-E
RAS-18NKD-E5 / RAS-18NA-E
RAS-24NKD-E5 / RAS-24NA-E
RAS-18NKDX5 / RAS-18N2AX
RAS-24NKDX5 / RAS-24N2AX
SPLIT WALL TYPE

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FILE NO. SVM-06005
CONTENTS
1. SPECIFICATIONS
2. CONSTRUCTIONVIEWS
2-1 Indoor Unit
2-2 Outdoor Unit (24 chassis)
2-3 Outdoor Unit (18 chassis)
3. WIRING DIAGRAM
3-1
3-2 RAS-18NKHD-E5 / RAS-18NAH-E
3-3 RAS-24NKD-E5/ RAS-24NA-E, RAS-24NKDX5 / RAS-24N2AX
RAS-18NKD-E5 / RAS-18NA-E, RAS-18NKDX5 / RAS-18N2AX
4. SPECIFICATION OF ELECTRICAL PARTS
4-1 Indoor Unit (RAS-18NKHD-E5)
4-2 Outdoor Unit (RAS-18NAH-E)
4-3
4-4 Indoor Unit (RAS-24NKD-E5, RAS-24NKDX5, RAS-18NKD-E5 , RAS-18NKDX5)
4-5 Outdoor Unit (RAS-24NA-E, RAS-24N2AX) Outdoor Unit (RAS-18NA-E, RAS-18N2AX)
5. REFRIGERATION CYCLE DIAGRAM
5-1
5-2 RAS-18NKHD-E5 / RAS-18NAH-E
5-3 RAS-24NKD-E5 / RAS-24NA-E, RAS-24NKDX5 / RAS-24N2AX
RAS-18NKD-E5 / RAS-18NA-E, RAS-18NKDX5 / RAS-18N2AX
6. CONTROL BLOCK DIAGRAM
6-1
6-2 RAS-18NKHD-E5 / RAS-18NAH-E
RAS-18NKD-E5 / RAS-18NA-E, RAS-18NKDX5 / RAS-18N2AX
RAS-24NKD-E5 / RAS-24NA-E, RAS-24NKDX5 / RAS-24N2AX
7-10
7.
QUIET Mode
OPERATION DESCRIPTION
7-11
7-1
COMFORT SLEEP mode
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

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FILE NO. SVM-06005
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)
9-9Troubleshooting for P.C. Board
9-10 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 (RAS-18NAH-E)
11-4 Outdoor Unit (RAS-24NA-E, RAS-24N2AX)
11-5 Outdoor Unit (RAS-18NA-E, RAS-18N2AX)
9-8Troubleshooting for Air Purifier and Minus Ion

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FILE NO. SVM-06005
MODEL RAS-24NKD-E5RAS-24NKDX5
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 V220 – 240
Hz 50
Power consumption W2350 2440 2350 2440
Power factor %99909990
Running current A0.3/10.5 0.3/11.0 0.3/10.50 0.3/11.0
Indoor/Outdoor
Starting current A67
Moisture removal lit/h 2.7
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 m15*1
(One way) 25*2
Maximum height m10
difference
INDOOR UNIT RAS-24NKD-E5RAS-24NKDX5
Height mm 298
Dimensions Width mm 998
Depth mm220
Net weight kg 14
Evaporator type Finned tube
Indoor fan type Cross flow fan
High fan m3/h 900
Air volume Medium fan m3/h 750
Low fan m3/h 600
Fan motor output W 30
Air filter Honeycomb woven filter with PP frame
OUTDOOR UNIT RAS-24NA-E RAS-24N2AX
Height mm 715
Dimensions Width mm780
Depth mm290
Netweight kg52
Condenser type Finned tube
Outdoor fan type Propeller fan
Airflow volume m3/h 2400 2550 2400 2550
Fan motor output W42
Compressor Model
Output W
Safety device IOL
Louver type Automatic louver
Usable outdoor temperature range °C
1. SPECIFICATIONS
RAS-24NA-E
1.68
PH400X3CS-4KT1
1800
Note: * 1 Charge less pipe
* 2 Maximum pipe
21 ~ 43

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FILE NO. SVM-06005
MODEL RAS-18NKHD-E5RAS-18NKD-E5RAS-18NKDX5
RAS-18NAH-E RAS-18NA-E RAS-18N2AX
ITEM Cooling Heating Cooling Cooling
Capacity kW
220 V 240 V220 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 V220 – 240
Hz 50
Power consumption W 1920 2040 1800 1950 1910 1990 1910 1990
Power factor %9588948692859285
Running current A0.3/0.3/0.3/0.3/0.3/9.10.3/9.40 0.3/9.150.3/9.40
Indoor/Outdoor 8.9 9.48.49.2
Moisture removal lit/h 2
Noise
Indoor (H/M/L) dB 44/42/39/37/35
Outdoor (220 – 240 V) dB 52-53 53-54 51 52 51 52
Refrigerant Name of refrigerant R22
Rated amount kg 1.53 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 m15*1
(One way) 20*2
Maximum height m8
difference
INDOOR UNIT RAS-18NKHD-E5 RAS-18NKD-E5 RAS-18NKDX5
Height mm 298
Dimensions Width mm 998
Depth mm220
Net weight kg 14
Evaporator type Finned tube
Indoor fan type Cross flow fan
High fan m3/h 900900 900
Air volume Medium fan m3/h 650 700 650
Low fan m3/h 530 570 530
Fan motor output W30
Air filter Honeycomb woven filter with PP frame
OUTDOOR UNIT RAS-18NAH-E RAS-18NA-E RAS-18N2AX
Depth mm
Net weight kg 43
Condenser type Finned tube
Outdoor fan type Propeller fan
Airflow volume m3/h 2350 2450 2350 2450
Fan motor output W42
Compressor Model
Output W 1500
Safety device IOL, Td Sensor IOL
Louver type Automatic louver
Usable outdoor temperature range °C 15 ~ 43 –10 ~ 24
Starting current A
Height mm
Dimensions Width mm
PH340X3C-4KT1
42
45
550
780
290
550
780
290
2350 2450 2450 2550
1500
Note: * 1 Charge less pipe
* 2 Maximum pipe
44/42/39/37/35
41
21~43

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FILE NO. SVM-06005
Note : 1
•Capacity is based on the following temperature conditions.
Note : 2
•Charge refrigerant according to the table below.
RAS-18NKHD-E5/ RAS-18NAH-E
RAS-24NKD-E / RAS-24NA-E
RAS-18NKD-E5/ RAS-18NA-E
Refrigerant RAS-24NKDX5/ RAS-24N2AX
RAS-18NKDX5/ RAS-18N2AX
1No need to charge 15 m or less 15 m or less
extra refrigerant
2Need 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

CONSTRUCTIONVIEWS
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
∅
65
(For stud bolt ∅ 6)
(For stud bolt ∅ 8 − ∅ 10)
Installation
Plate outline
Outline of indoor unit
Connection pipe (0.39 m)
(For 24 series : Flare ∅15.88)
(For 18 series : Flare ∅12.7)
Back body
Front panel
Grille inlet
298
75
7
51
Knock out system
2-1. Indoor Unit
FILE NO. SVM-06005
–6–

HANDLE
COVER-PV
HANDLE
600
Z View Service port
321
307
A Detail Drawing (Back leg) Ø
25 Drain outlet
2Ø11x14 Hole
(For Ø8-Ø10 anchor bolt) B
Ø6Hole
Ø11x14 Hole
50
36 R15
R
5.5
Ø6 hole
28
321
86
A
124109
600 or more
Air out
let
321
600
Air inlet
4xØ11 Long holes(ForØ8-Ø10 anchor bolt)
Gas-side
(Flare Ø15.88)
Liquid side
(Flare Ø6.35)
90 600 90 69 342
321
Z
50
36 R15
B Detail Drawing (Front leg)
Ø436
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-06005

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
ØØØ
Ø6 hole
86
Ø6 hole
Ø11x14 hole
R15
28 A
321
R5.5
36
109 124
50
129
84
54
600
321
9060090
275
290
550
Ø436
Z
R15
50
36
-
2
321
342
69
ØØØ
2-3. Outdoor Unit(18 Class)
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FILE NO. SVM-06005

FILE NO.SVM-06005
3-1. RAS-18NKHD-E5 / RAS-18NAH-E
Louver
motor
BLK P04
BLK
WHI
RED
CN30
CN31
CN23 Serial Signal
Circuit
MAIN P.C BOARD
(WP - 003)
Varistor
Varistor
F01
250V
6.3A
DSA
CN11 CN10 CN03 CN01
WP-003
Fan motor
Drive
Circuit
Power supply
circuit
CN25
CN07
Infrared rays receive
and Indication parts
CN33
CN34 Micro SW.
+ 12 VDC
+ 5 VDC
High-voltage
Power supply
Ion electrode
Air purifier
Electrode
Heat exchanger
sensor
(TC)
Thermo
sensor
(TA)
TEMP FUSE
AC Fan motor
YEL
GRY BRW
WHI
BLK RED
BLK
BLK
BLK
BLK
REDRED
BLK
BLK
BRW
BRW
BRW
BRW
REW
BLK
BLK/RED
BRW
BRW
RED
BRW
BLU
WHI BLU
BLU BLU
BLU
BLU BLU BLU
BLU
BLU
BLU
PNK
YEL
GRN
RED
BRW
DISCHARGE
PIPE
SENSOR (TD)
HEAT
EXCHANGER
SENSOR (TE)
CN08
CN07 BLU
BLU
BLK
BLK
11
2
33
11
2
33
3
12
i
LN3
12
i
FERRITE CORE
GRN&YEL
RED
RED
BLK
BLK
MAGNETIC
CONTACTOR
RA1
A2
52C
U
S
V
T
W
PNK
WHI
COMPRESSOR TERMINAL
BLK
S
R
CWHI 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
11
33
11
33
2
CN11
BLU
YEL
1
3
1
3
1
13
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)
POWER SUPPLY
220 −240 V ~ 50 Hz
INDOOR
TERMINAL
BLOCK
OUTDOOR
TERMINAL
BLOCK
INDOOR
UNIT
OUTDOOR
UNIT
COMPRESSOR FAN MOTOR
C
SR
−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
3. WIRING DIAGRAM