Toshiba RAS-24NKHD-E4 User manual

FILE NO. SVM-05016-1
SERVICE MANUAL
AIR CONDITIONER
SPLIT WALL TYPE
RAS-24NKHD-E4 / RAS-24UAH-E4
RAS-18NKHD-E4 / RAS-18UAH-E4
RAS-24NKD-E4 / RAS-24UA-E4
RAS-18NKD-E4 / RAS-18UA-E4
RAS-24NKD-AR4 / RAS-24UA-AR4
RAS-18NKD-AR4 / RAS-18UA-AR4
RAS-24NKDX4 / RAS-24UAX4
RAS-18NKDX4 / RAS-18UAX4
RAS-24NKDX4-T / RAS-24UAX3-T1
RAS-18NKDX4-T2 / RAS-18UAX4-T2
18 Class
(Heat pump model) 24 Class18 Class (Cooling only model)
June 2005

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FILE NO. SVM-05016
CONTENTS
1. SPECIFICATIONS
2. CONSTRUCTION VIEWS
2-1 Indoor Unit
2-2 Outdoor Unit (RAS-24UAH-E4, RAS-24UA-E4, RAS-24UAX4, RAS-24UA-AR4,
RAS-24UAX3-T1, RAS-18UAX4-T2)
2-3 Outdoor Unit (RAS-18UAH-E4)
2-4 Outdoor Unit (RAS-18UA-E4, RAS-18UAX4, RAS-18UA-AR4)
3. WIRING DIAGRAM
3-1 RAS-24NKHD-E4/ RAS-24UAH-E4
3-2 RAS-18NKHD-E4/ RAS-18UAH-E4
3-3 RAS-24NKD-E4/ RAS-24UA-E4, RAS-24NKD-AR4/ RAS-24UA-AR4
RAS-24NKDX4/ RAS-24UAX4
3-5RAS-18NKD-E4/ RAS-18UA-E4, RAS-18NKDX4/ RAS-18UAX4
RAS-18NKD-AR4/ RAS-18UA-AR4
3-6 RAS-18NKDX4-T2 / RAS-18UAX4-T2
4. SPECIFICATION OF ELECTRICAL PARTS
4-1 Indoor Unit (RAS-24NKHD-E4, RAS-18NKHD-E4)
4-2 Outdoor Unit (RAS-24UAH-E4)
4-3 Outdoor Unit (RAS-18UAH-E4)
4-4 Indoor Unit (RAS-24NKD-E4, RAS-24NKDX4, RAS-24NKD-AR4, RAS-24NKDX4-T,
RAS-18NKD-E4, RAS-18NKDX4, RAS-18NKD-AR4, RAS-18NKDX4-T2)
4-5 Outdoor Unit (RAS-24UA-E4, RAS-24UAX4, RAS-24UAX3-T1)
4-6 Outdoor Unit (RAS-24UA-AR4)
4-7 Outdoor Unit (RAS-18UAX4, RAS-18UA-E4)
4-8 Outdoor Unit (RAS-18UA-AR4)
4-9 Outdoor Unit (RAS-18UAX4-T2)
5. REFRIGERATION CYCLE DIAGRAM
5-1 RAS-24NKHD-E4/ RAS-24UAH-E4
5-2 RAS-18NKHD-E4/ RAS-18UAH-E4
5-3 RAS-24NKD-E4/ RAS-24UA-E4
RAS-24NKDX4/ RAS-24UAX4, RAS-24NKDX4-T/ RAS-24UAX3-T1
5-4RAS-18NKD-E4/ RAS-18UA-E4
RAS-18NKDX4/ RAS-18UAX4
5-5RAS-18NKD-AR4/ RAS-18UA-AR4
5-7RAS-18NKDX4-T2 / RAS-18UAX4-T2
6. CONTROL BLOCK DIAGRAM
6-1 RAS-24NKHD-E4, RAS-18NKHD-E4
6-2 RAS-18NKD-E4 / RAS-18UA-E4, RAS-18NKDX4 / RAS-18UAX4
RAS-18NKD-AR4 / RAS-18UA-AR4, RAS-18NKDX4-T2 / RAS-18UAX4-T2
RAS-24DKD-E4 / RAS-24UA-E4, RAS-24NKDX4 / RAS-24UAX4
RAS-24NKD-AR4 / RAS-24UA-AR4, RAS-24NKDX4-T / RAS-24UAX3-T1
5-6RAS-24NKD-AR4/ RAS-24UA-AR4
3-4 RAS-24NKDX4-T / RAS-24UAX3-T1

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FILE NO. SVM-05016
7. OPERATION DESCRIPTION
7-1 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
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-24UAH-E4, RAS-24UA-E4, RAS-24UAX4, RAS-24UA-AR4
RAS-24UAX3-T1, RAS-18UAX4-T2)
10-3 Outdoor Unit (RAS-18UAH-E4)
10-4 Outdoor Unit (RAS-18UA-E4, RAS-18UAX4, RAS-18UA-AR4)
11. EXPLODED VIEWS AND PARTS LIST
11-1 Indoor Unit (E - Parts Assy)
11-2 Indoor Unit
11-3 Outdoor Unit (RAS-24UAH-E4)
11-4 Outdoor Unit (RAS-18UAH-E4)
11-5 Outdoor Unit (RAS-24UA-E4, RAS-24UAX4, RAS-24UAX3-T1)
11-6 Outdoor Unit (RAS-24UA-AR4)
11-7 Outdoor Unit (RAS-18UAX4-T2)
11-8 Outdoor Unit (RAS-18UA-E4, RAS-18UAX4)
11-9 Outdoor Unit (RAS-18UA-AR4)
7-9 Self-Cleaning function
7-10 QUIET Mode
7-11 COMFORT SLEEP mode
9-8Troubleshooting for Air Purifier and Minus Ion

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FILE NO. SVM-05016
MODEL
RAS-24NKHD-E4RAS-24NKD-E4RAS-24NKDX4RAS-24NKD-AR4RAS-24NKDX4-T
RAS-24UAH-E4
RAS-24UAX4 RAS-24UA-AR4
RAS-24UAX3-T1
ITEM Cooling Heating Cooling Cooling Cooling Cooling
Capacity kW
220 V 240 V 220 V 240 V 220 V 240 V 220 V 240 V 220 V 240 V 220 V
6.30 6.30 6.80 6.90 6.40 6.45 6.40 6.45 6.40 6.45 6.40
Phase 1∅
Power source V 220 – 240 220
Hz 50
Power consumption W 2430 2510 2390 2490 2350 2440 2350 2440 2350 2440 2350
Power factor %96929490999099909686 99
220 V 240 V 220 V 240 V 220 V 240 V 220 V 240 V 220 V 240 V 220 V
Running current A0.3/ 0.3/ 0.3/0.3/0.3/10.5 0.3/11.0 0.3/10.50 0.3/11.0 0.3/10.8 0.3/11.5 0.3/10.50
Indoor/Outdoor 11.2 11.1 11.2 11.28
Starting current A6067 67 59 67
Moisture removal lit/h 2.5 2.7
Noise Indoor (H/M/L) dB 45/43/41/39/37
Outdoor (220 – 240 V) dB 56-57 57-58 56-57 56
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-24NKHD-E4RAS-24NKD-E4RAS-24NKDX4RAS-24NKD-AR4RAS-24NKDX4-T
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 750 800 750
Low fan m3/h 600 650 600
Fan motor output W 30
Air filter Honeycomb woven filter with PP frame
OUTDOOR UNIT RAS-24UAH-E4RAS-24UA-E4RAS-24UAX4RAS-24UA-AR4RAS-24UAX3-T1
Height mm 690
Dimensions Width mm 880
Depth mm310
Netweight kg6158 59 58
Condenser type Finned tube
Outdoor fan type Propeller fan
Airflow volume m3/h 3380 3560 3380 3560 3380 3560 3380
Fan motor output W 65
Compressor Model 2JS386D5BB02 PH400X3CS-4KTS1
Output W1800 1800
Safety device IOL, Td Sensor IOL
Louver type Automatic louver
Usable outdoor temperature range °C 15 ~ 43 –10 ~ 24 15 ~ 43 21 ~ 43 21 ~ 52 21 ~ 43
1. SPECIFICATIONS
RAS-24UA-E4
1.75 1.70 1.80 1.70 1.70
3380 3560 3380 3560
PH400X3CS-4KT1
1800 1900
PH400X3CS-4KT1
Note: * 1 Charge less pipe
* 2 Maximum pipe

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FILE NO. SVM-05016
MODEL
RAS-18NKHD-E4RAS-18NKD-E4RAS-18NKDX4RAS-18NKD-AR4RAS-18NKDX4-T2
RAS-18UAH-E4RAS-18UA-E4RAS-18UAX4RAS-18UA-AR4RAS-18UAX4-T2
ITEM Cooling Heating Cooling Cooling Cooling Cooling
Capacity kW
220 V 240 V 220 V 240 V 220 V 240 V 220 V 240 V 220 V 240 V 220 V
5.05 5.05 5.80 5.90 5.20 5.25 5.20 5.25 5.20 5.25 5.10
Phase 1∅
Power source V 220 – 240 220
Hz 50
Power consumption W 1920 2040 1800 1950 1910 1990 1910 1990 1920 2040 1560
Power factor %9588948692859285958598
220 V 240 V220 V 240 V 220 V 240 V 220 V 240 V 220 V 240 V 220 V
Running current A 0.2/ 0.2/ 0.2/ 0.2/ 0.2/9.250.2/9.50 0.2/9.25 0.2/9.50 0.2/9.0 0.2/9.80.3/6.94
Indoor/Outdoor 9.0 9.5 8.5 9.3
Moisture removal lit/h 2
Noise
Indoor (H/M/L) dB 42/41/39/37/35
Outdoor (220 – 240 V) dB 52-53 53-54 51 52 51 52 515256
Refrigerant Name of refrigerant R22
Rated amount kg 1.17 1.17 1.20
Refrigerant control Capillary tube
Gas side size mm ∅12.7 ∅15.88
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-E4 RAS-18NKD-E4 RAS-18NKDX4 RAS-18NKD-AR4 RAS-18NKDX4-T2
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 750 800 750 900
Air volume Medium fan m3/h 650 700 650 650
Low fan m3/h 530 570 530 530
Fan motor output W30
Air filter Honeycomb woven filter with PP frame
OUTDOOR UNIT RAS-18UAH-E4 RAS-18UA-E4 RAS-18UAX4 RAS-18UA-AR4 RAS-18UAX4-T2
Depth mm
Net weight kg 54414144 51
Condenser type Finned tube
Outdoor fan type Propeller fan
Airflow volume m3/h 2120 2200 2120 2200 2120 2200 3380
Fan motor output W
654265
Compressor Model
2JS350D5DA02 PH290X2C-4FT1
Output W 1700 1800 1700
Safety device IOL, Td Sensor IOL
Louver type Automatic louver
Usable outdoor temperature range °C 15 ~ 43 –10 ~ 24 15 ~ 43 15 ~ 43 21 ~ 52 21 ~ 43
Starting current A35
Height mm 690
Dimensions Width mm880
PH340X3C-4KT1
42
45
550
780
270
538
830
300
310
2105 23102105 2310
1500
PH340X3C-4KTS1
Note: * 1 Charge less pipe
* 2 Maximum pipe
1.47

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FILE NO. SVM-05016
Note : 1
•Capacity is based on the following temperature conditions.
Note : 2
•Charge refrigerant according to the table below.
RAS-24NKHD-E4/ RAS-24UAH-E4RAS-18NKHD-E4/ RAS-18UAH-E4
RAS-24NKD-E4/ RAS-24UA-E4RAS-18NKD-E4/ RAS-18UA-E4
Refrigerant RAS-24NKDX4/ RAS-24UAX4RAS-18NKDX4/ RAS-18UAX4
RAS-24NKD-AR4/ RAS-24UA-AR4RAS-18NKD-AR4/ RAS-18UA-AR4
RAS-24NKDX4-T/ RAS-24UAX3-T1RAS-18NKDX4-T2/ RAS-18UAX4-T2
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

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FILE NO. SVM-05016
2. CONSTRUCTIONVIEWS
2-1. Indoor Unit
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 and RAS-18NKDX4-T2 : Flare ∅15.88)
(For 18 series except RAS-18NKDX4-T2 : Flare ∅12.7)
Back body
Front panel
Grille inlet
298
75
7
51
Knock out system

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FILE NO. SVM-05016
2-2.Outdoor Unit (RAS-24UAH-E4, RAS-24UA-E4, RAS-24UAX4, RAS-24UA-AR4,
RAS-24UAX3-T1,RAS-18UAX4-T2)
120
63.8
340
600
27
50
690
880 74
140
88
310
340
340 (pitch) 12
12
364
A
∅12x18 hole
ADetail Drawing
∅25 Drain outlet
52
Handle
Installation dimension
600
100 or more 100 or more
600 or more
600 or more
Air outlet
Air inlet
Electric Parts cover
Liquid side (Flare ∅6.35)
Gas side (Flare ∅15.88)
Service Port
600
340
23
68
Handle
4-∅12x18
for ∅8 −∅10
anchor bolt
4-∅12x18 holes
(for ∅8 −∅10 anchor bolt)

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FILE NO. SVM-05016
2-3.Outdoor Unit (RAS-18UAH-E4)
A
ADetail Drawing
∅6 hole
R10
∅11x14 hole
∅25 Drain outlet
Fan guard
∅420
Electric Parts cover
Liquid side (Flare ∅6.35)
Gas side (Flare ∅12.7)
Installation dimension
100 or more Air inlet 600 or more
100 or more
Air inlet
Air
outlet
600 or more
600
50 35
600
344
325
91 54
60
50
90
600
830
90
120
52
23
325
Handle
538
300
Service Port
4x∅11x14
for ∅8 −∅10
anchor bolt
8-∅6 holes
(for fixing outdoor unit)
6-∅11x14 holes (for ∅8 −∅10 anchor bolt)

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FILE NO. SVM-05016
2-4.Outdoor Unit (RAS-18UA-E4, RAS-18UAX4, RAS-18UA-AR4)
310
310 302
102
310
302
302
530
265
600
ADetail Drawing (Back Leg)
A
BDetail Drawing (Front Leg)
52
R15
32.5 115 125
R5.5
∅30 Drain outlet
FAN GUARD
36
∅6 Hole
2-∅11x14 Hole
(For ∅8-∅10 anchor bolt)
∅436
4x ∅ 11 Long holes (For ∅8-∅10 anchor bolt)
∅11x14 Hole
∅6 Hole
36
52
310
330
R15
270 600 90
780 62
COVER PV
Electrical
part cover
Liquid side
(Flare ∅6.35)
Gas side
(Flare ∅12.7)
Service port
600 or more
100 or more
600 or more
100 or more
325
600
Air inlet
Air outlet
Installation dimension
120
75
54
B
Z
ZView