Technibel CA250X5TAA, CA360X5TAA, GR250X5TAA, GR360X7TAA, GR250X7TAA Technical & Service Manual

TECHNICAL & SERVICE MANUAL

SPLIT SYSTEM AIR CONDITIONER

CA250X5TAA - GR250X5TAA
CA250X5TAA - GR250X7TAA
CA360X5TAA - GR360X7TAA
CA480X5TAA - GR480X7TAA

0.8180.112.1 05/01

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2

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Table of Contents

1.SPECIFICATIONS…………………………………………………………………………… 3

1-1 Unit Specifications…………………………………………………………………….. 3
1-2 Major Component Specifications……………………………………………………. 7

(A) Indoor Unit……………………………………………………………………….... 7

(B) Outdoor Unit………………………………………………………………………. 9

1-3 Other Component Specifications……………………………………………………. 12

(A) Indoor Unit……………………………………………………………………….... 12

(B) Outdoor Unit………………………………………………………………………. 13

1-4 Dimensional Data……………………………………………………………………... 14

(A) Indoor Unit……………………………………………………………………….... 14

(B) Outdoor Unit………………………………………………………………………. 16
1-5 Refrigerant Flow Diagram……………………………………………………………. 18
1-6 Operating Range……………………………………………………………………… 20
1-7 Cooling Capacity………………………………………………………………………. 21
1-8 Noise Criterion Curves……………………………………………………………….. 25
1-9 Air Throw Distance Chart…………………………………………………………….. 27

2. PROCESSES AND FUNCTIONS……………………………………………………….… 28
2-1 Room Temperature Control………………………………………………………….. 28
2-2 Freeze Prevention (Cooling)……………………………………………………….… 29
2-3 Drain Pump Control…………………………………………………………………… 29
2-4 Outdoor Fan Control………………………………………………………………….. 30

3. ELECTRICAL DATA………………………………………………………………………... 31
3-1 Electrical Characteristics……………………………………………………………... 31
3-2 Electric Wiring Diagrams / Schematic Diagrams…………………………………... 33

(A) Indoor Unit……………………………………………………………………….... 33

(B) Outdoor Unit………………………………………………………………………. 35

4. SERVICE PROCEDURES………………………………………………………………….. 43
4-1 Troubleshooting……………………………………………………………………….. 43
4-2 A Sensor is Defective…………………………………………………………………. 54
4-3 Operation of Major Electrical parts………………………………………………….. 54
4-4 Checking the Electrical Components……………………………………………….. 55

– 3 –

1.SPECIFICATIONS

MODEL No. Indoor Unit CA250X5TAA

Outdoor Unit GR250X5TAA

POWER SOURCE 220 - 230 - 240 V / 1 Phase / 50 Hz
PERFORMANCE Cooling

Capacity kW 7.3

BTU / h 25,000
Air circulation (Hi/Me/Lo) m3 / h 1,140/1,020/840
Moisture removal(High) Liters/ h 3.6

ELECTRICAL RATINGS

Voltage rating V 220 230 240
Available voltage range V 198 - 264
Running amperes* A 14.5 14.6 14.7
Max. running amperes** A 20.2 19.6 19.4
Power input kW 3.01 3.07 3.16
Power factor % 94.4 91.4 89.6
C.O.P W / W 2.43 2.38 2.31
Max. starting amperes A 69 72 75

FEATURES

Controls Microprocessor
Timer ON/OFF 24-hours & Program
Fan speeds Indoor/Outdoor 3 and Automatic control/ 2 (Auto)
Airflow direction (Indoor) Automatic (Remote control)
Air filter Washable, easy access
Remote controller (Accessory) RCS-5PN3E
Refrigerant control Capillary tube
Drain pump (drain connection) Max. head 25cm above drain connection (25A,OD32mm)
Compressor Rotary
Operation sound Indoor - Hi/Me/Lo dB - A 37 / 35 / 31

Outdoor - Hi dB - A 53

REFRIGERANT TUBING

Limit of tubing length m (ft.) 40 (131)
Limit of tubing length at shipment m (ft.) 15 (49)
Limit of elevation difference m (ft.) Outdoor unit is higher than indoor unit: 40 (131)
between the two units Outdoor unit is lower than indoor unit: 25 (82)
Refrigerant tube Narrow tube mm (in) 6.35 (1 / 4)
outer diameter Wide tube mm (in) 15.88 (5 / 8)
Refrigerant amount at shipment kg R22 - 2.4
DIMENSIONS & WEIGHT Indoor unit Outdoor unit
Unit dimensions Height mm (in) 328(12-29/32) 735(28-30/32)

Width mm (in) 860(33-27/32) 940(37)
Depth mm (in) 860(33-27/32) 340(13-12/32)

Package dimensions Height mm (in) 410(16-5/32) 826(32-17/32)

Width mm (in) 988(38-29/32) 1,016(40)

Depth mm (in) 988(38-29/32) 416(16-12/32)
Net weight kg (lb) 30(66) 68(150)
Shipping weight kg (lb) 47(104) 74(163)
Shipping volume m3 (Cu. ft.) 0.4(14.1) 0.349(12.3)

DATA SUBJECT TO CHANGE WITHOUT NOTICE

Cooling :

Rating conditions(*) : Indoor air temperature 27 °C DB / 19 °C WB, Outdoor air temperature 35 °C DB

1-1 Unit Specifications

– 4 –

1.SPECIFICATIONS

MODEL No. Indoor Unit CA250X5TAA

Outdoor Unit GR250X7TAA

POWER SOURCE 380 - 400 - 415 V / 3N / 50 Hz
PERFORMANCE Cooling

Capacity kW 7.3

BTU / h 25,000
Air circulation (Hi/Me/Lo) m3 / h 1,140/1,020/840
Moisture removal(High) Liters/ h 3.6

ELECTRICAL RATINGS

Voltage rating V 380 400 415
Available voltage range V 342- 456
Running amperes* A 4.7 4.7 4.6
Max. running amperes** A 6 5.8 5.7
Power input kW 2.76 2.8 2.81
Power factor % 89.2 86 85
C.O.P W / W 2.64 2.61 2.6
Max. starting amperes A 27 29 30

FEATURES

Controls Microprocessor
Timer ON/OFF 24-hours & Program
Fan speeds Indoor/Outdoor 3 and Automatic control/ 2 (Auto)
Airflow direction (Indoor) Automatic (Remote control)
Air filter Washable, easy access
Remote controller (Accessory) RCS-5PN3E
Refrigerant control Capillary tube
Drain pump (drain connection) Max. head 25cm above drain connection (25A,OD32mm)
Compressor Rotary
Operation sound Indoor - Hi/Me/Lo dB - A 37 / 35 / 31

Outdoor - Hi dB - A 53

REFRIGERANT TUBING

Limit of tubing length m (ft.) 40 (131)
Limit of tubing length at shipment m (ft.) 15 (49)
Limit of elevation difference m (ft.) Outdoor unit is higher than indoor unit: 40 (131)
between the two units Outdoor unit is lower than indoor unit: 25 (82)
Refrigerant tube Narrow tube mm (in) 6.35 (1 / 4)
outer diameter Wide tube mm (in) 15.88 (5 / 8)
Refrigerant amount at shipment kg R22 - 2.4
DIMENSIONS & WEIGHT Indoor unit Outdoor unit
Unit dimensions Height mm (in) 328(12-29/32) 735(28-30/32)

Width mm (in) 860(33-27/32) 940(37)
Depth mm (in) 860(33-27/32) 340(13-12/32)

Package dimensions Height mm (in) 410(16-5/32) 826(32-17/32)

Width mm (in) 988(38-29/32) 1,016(40)

Depth mm (in) 988(38-29/32) 416(16-12/32)
Net weight kg (lb) 30(66) 68(150)
Shipping weight kg (lb) 47(104) 74(163)
Shipping volume m3 (Cu. ft.) 0.4(14.1) 0.349(12.3)

DATA SUBJECT TO CHANGE WITHOUT NOTICE

Cooling :

Rating conditions(*) : Indoor air temperature 27 °C DB / 19 °C WB, Outdoor air temperature 35 °C DB

1-1 Unit Specifications

– 5 –

1.SPECIFICATIONS

MODEL No. Indoor Unit CA360X5TAA

Outdoor Unit GR360X7TAA

POWER SOURCE 380 - 400 - 415 V / 3N / 50 Hz
PERFORMANCE Cooling

Capacity kW 10.6

BTU / h 36,000
Air circulation (Hi/Me/Lo) m3 / h 1,920/1,680/1,320
Moisture removal(High) Liters/ h 4.7

ELECTRICAL RATINGS

Voltage rating V 380 400 415
Available voltage range V 342 - 456
Running amperes* A 5.2 5.1 5.1
Max. running amperes** A 6.7 6.5 6.4
Power input kW 3.07 3.11 3.15
Power factor % 89.7 88 85.9
C.O.P W / W 3.45 3.41 3.37
Max. starting amperes A 31 33 34

FEATURES

Controls Microprocessor
Timer ON/OFF 24-hours & Program
Fan speeds Indoor/Outdoor 3 and Automatic control/ 2 (Auto)
Airflow direction (Indoor) Automatic (Remote control)
Air filter Washable, easy access
Remote controller (Accessory) RCS-5PN3E
Refrigerant control Capillary tube
Drain pump (drain connection) Max. head 25cm above drain connection (25A,OD32mm)
Compressor Rotary
Operation sound Indoor - Hi/Me/Lo dB - A 43 / 40 / 36

Outdoor - Hi dB - A 54

REFRIGERANT TUBING

Limit of tubing length m (ft.) 50 (164)
Limit of tubing length at shipment m (ft.) 15 (49)
Limit of elevation difference m (ft.) Outdoor unit is higher than indoor unit: 50 (164)
between the two units Outdoor unit is lower than indoor unit: 30 (98)
Refrigerant tube Narrow tube mm (in) 9.52 (3 / 8)
outer diameter Wide tube mm (in) 19.05 (3 / 4)
Refrigerant amount at shipment kg R22 - 4.0
DIMENSIONS & WEIGHT Indoor unit Outdoor unit
Unit dimensions Height mm (in) 358(14-3/32) 1,235(48-20/32)

Width mm (in) 1,150(45-9/32) 940(37)
Depth mm (in) 860(33-27/32) 340(13-12/32)

Package dimensions Height mm (in) 440(17-10/32) 1,326(52-7/32)

Width mm (in) 1,278(50-10/32) 1,016(40)
Depth mm (in) 988(38-29/32) 416(16-12/32)

Net weight kg (lb) 38(84) 94(207)
Shipping weight kg (lb) 62(137) 101(223)
Shipping volume m

3

(Cu. ft.) 0.556(19.6) 0.56(19.8)

DATA SUBJECT TO CHANGE WITHOUT NOTICE

Cooling :

Rating conditions(*) : Indoor air temperature 27 °C DB / 19 °C WB, Outdoor air temperature 35 °C DB

1-1 Unit Specifications

– 6 –

1.SPECIFICATIONS

MODEL No. Indoor Unit CA480X5TAA

Outdoor Unit GR480X7TAA

POWER SOURCE 380 - 400 - 415 V / 3N / 50 Hz
PERFORMANCE Cooling

Capacity kW 14

BTU / h 47,800
Air circulation (Hi/Me/Lo) m3 / h 1,920/1,680/1,320
Moisture removal(High) Liters/ h 7.4

ELECTRICAL RATINGS

Voltage rating V 380 400 415
Available voltage range V 342 - 456
Running amperes* A 8.4 8.5 8.9
Max. running amperes** A 10.3 9.9 9.5
Power input kW 4.7 4.76 4.86
Power factor % 85 80.8 76
C.O.P W / W 2.98 2.94 2.88
Max. starting amperes A 71 73 75

FEATURES

Controls Microprocessor
Timer ON/OFF 24-hours & Program
Fan speeds Indoor/Outdoor 3 and Automatic control/ 2 (Auto)
Airflow direction (Indoor) Automatic (Remote control)
Air filter Washable, easy access
Remote controller (Accessory) RCS-5PN3E
Refrigerant control Capillary tube
Drain pump (drain connection) Max. head 25cm above drain connection (25A,OD32mm)
Compressor Rotary
Operation sound Indoor - Hi/Me/Lo dB - A 43 / 40 / 36

Outdoor - Hi dB - A 56

REFRIGERANT TUBING

Limit of tubing length m (ft.) 50 (164)
Limit of tubing length at shipment m (ft.) 15 (49)
Limit of elevation difference m (ft.) Outdoor unit is higher than indoor unit: 50 (164)
between the two units Outdoor unit is lower than indoor unit: 30 (98)
Refrigerant tube Narrow tube mm (in) 9.52 (3 / 8)
outer diameter Wide tube mm (in) 19.05 (3 / 4)
Refrigerant amount at shipment kg R22 - 4.3
DIMENSIONS & WEIGHT Indoor unit Outdoor unit
Unit dimensions Height mm (in) 358(14-3/32) 1,235(48-20/32)

Width mm (in) 1,150(45-9/32) 940(37)
Depth mm (in) 860(33-27/32) 340(13-12/32)

Package dimensions Height mm (in) 440(17-10/32) 1,326(52-7/32)

Width mm (in) 1,278(50-10/32) 1,016(40)

Depth mm (in) 988(38-29/32) 416(16-12/32)
Net weight kg (lb) 38(84) 106(234)
Shipping weight kg (lb) 62(137) 113(249)
Shipping volume m3 (Cu. ft.) 0.556(19.6) 0.56(19.8)

DATA SUBJECT TO CHANGE WITHOUT NOTICE

Cooling :

Rating conditions(*) : Indoor air temperature 27 °C DB / 19 °C WB, Outdoor air temperature 35 °C DB

1-1 Unit Specifications

– 7 –

1.SPECIFICATIONS

(A)Indoor Unit

MODEL No. CA250X5TAA
Source 220 - 230 - 240 V / 1 phase / 50 Hz
Remote controller (Accessory) RCS- 5PN3E
Controller P. C. B Ass'y CR - X363GS
Switch Ass'y SW - X363GS
Fan (Number … diameter) mm Turbo (1… ø 490)
Fan motor

Model … Nominal output W SFG6X - 41A5P … 40 W
Source 220 - 230 - 240 V / 1 phase / 50 Hz
No. of pole … r.p.m. (230 V, High) rpm 6 … 470
Coil resistance Ω BRN – WHT :114.0 , ORG–YEL : 66.4
(Ambient temperature 20 °C) WHT–VLT : 23.9 , WHT–PNK : 77.4

VLT –ORG : 12.4 , YEL–BLK : 82.1

Safety device

Operating temperature Open°C130±8 °C

Close°C79±15 °C

Run capacitor VAC , µF 440 V , 4 µF

Heat exchanger

Coil Aluminum plate fin / Copper tube
Rows … fin pitch mm 2 … 1.7
Face area m

2

0.295

Panel

Model No. PNR - X253GS
Indicator Lamp Ass'y IND - X253GS
Dew proof heater 240 V , 26 W
Auto louver motor M2LB24ZA12
Auto louver motor … Rated V, W, rpm. 240 VAC , 3 W , 2.5 rpm
Coil resistance (at 25 °C) Ω 15,620 Ω ± 15 %

1-2 Major Component Specifications

– 8 –

1.SPECIFICATIONS

(A) Indoor Unit

MODEL No. CA360X5TAA CA480X5TAA
Source 220 - 230 - 240 V / 1 phase / 50 Hz
Remote controller (Accessory) RCS - 5PN3E
Controller P. C. B Ass'y CR - X363GS
Switch ass'y SW - X363GS
Fan (Number … diameter) mm Turbo (1… ø 490)
Fan motor

Model … Nominal output W SFG6X - 61A3P … 60 W
Source 220 - 230 - 240 V / 1 phase / 50 Hz
No. of pole … r.p.m. (230 V, High) rpm 6 … 530
Coil resistance Ω BRN – WHT : 71.1 , ORG–YEL : 22.7
(Ambient temperature 20 °C) WHT–VLT : 8.7 , VLT –PNK : 43.2

VLT –ORG : 13.3 , YEL–BLK : 54.32

Safety device

Operating temperature Open°C130±8 °C

Close°C79±15 °C

Run capacitor VAC , µF 440 V , 6 µF

Heat exchanger

Coil Aluminum plate fin / Copper tube
Rows … fin pitch mm 2 … 1.7
Face area m

2

0.479

Panel

Model No. PNR - X483GS
Indicator Lamp ass'y IND - X483GS
Dew proof heater 240 V , 31 W
Auto louver motor M2LB24ZA12
Auto louver motor … Rated V, W, rpm 240 VAC , 3 W , 2.5 rpm
Coil resistance (at 25 °C) Ω 15,620 Ω ± 15 %

– 9 –

1.SPECIFICATIONS

(B) Outdoor Unit

MODEL No. GR250X5TAA

Source 220 - 230 - 240 V / 1 phase / 50 Hz
Compressor Rotary (Hermetic)

Model ... Code No. C - R221H5V
Nominal output W 2,200

Compressor oil cc 1,350
Coil resistance (at 25°C) Ω

C - R : 0.76, C - S :2.76

Refrigerant amount at shipment kg R22 - 2.4
Safety device Internal/OL - D24

Operating temperature Open °C 160±5/150±10

Close °C 87±9/63±10

Run capacitor V,µF 400V, 40

High pressure switch ACB - 1TB07

Set pressure OFF kg/cm

2

30

ON kg/cm

2

24 ± 2.0

Fan (Number…diameter (mm)) Propeller (1…ø 460)
Fan motor

Model…Nominal output W KFC6S - 91C5P…100 W

No. of pole ... rpm (230V, High) rpm 6...868
Coil resistance Ω BRN – WHT : 61.0

(Ambient temperature 20°C) YEL–PNK : 17.7

WHT–YEL : 64.3

Safety device Internal type

Operating temperature Open °C 130±8

Close °C 79±15

Run capacitor VAC, µF 440 V, 5 µF

Heat exchanger

Coil Aluminium plate fin / Copper tube
Rows ... fin pitch mm 2...2.0
Face area m

2

0.616

+ 2.0
+ 0.5

1-2 Major Component Specifications

– 10 –

1.SPECIFICATIONS

(B) Outdoor Unit

MODEL No. GR250X7TAA
Source 380 - 400 - 415 V / 3 phase / 50 Hz
Compressor Rotary (Hermetic)

Model … Code No. C - R224H8S
Nominal output W 2,200
Compressor oil CC 1,350
Coil resistance (at 25°C) Ω R - S:5.54,S - T:5.54,T - R: 5.54
Refrigerant amount at shipment kg R22 - 2.4
Safety device Internal type External type
Overload relay models — FMSA - 1SZ607A
Operating temperature Open °C120±5—

Close °C98±11 —
Operating ampere (at 25°C) A — 6A, 110 %
Run capacitor V, µF—

High pressure switch ACB - 1TB07

Set pressure OFFkg/cm

2

30

ON kg/cm

2

24 ± 2.0

Fan Number … diameter mm Propeller (1 … ø 460)
Fan motor

Model … Nominal output W KFC6S - 91C5P … 100 W
No. of pole … rpm (230 V, High) rpm 6 … 868
Coil resistance Ω BRN – WHT : 61.0 , YEL–PNK : 17.7

(Ambient temperature 20°C)

WHT–YEL : 64.3

Safety device

Operating temperature Open °C130±8

Close °C79±15

Run capacitor VAC, µF 440V, 5 µF

Heat exchanger

Coil Aluminum plate fin / Copper tube
Rows … fin pitch mm 2 … 2.0
Face area m

2

0.616

+ 2.0
+ 0.5

– 11 –

1.SPECIFICATIONS

(B) Outdoor Unit

MODEL No. GR360X7TAA GR480X7TAA

Source 380-400- 415 V / 3 phase / 50 Hz
Compressor Rotary (Hermetic) Scroll (Hermetic)

Model...Code No. C - R243H8T ZR61KC - TFD - 522
Nominal output W 2,400 3,750
Compressor oil cc 1,350 2,130

Coil resistance Ω T – R:5.54,R – S:5.54 T1 – T2:2.72,T2 – T3:2.72
(Ambient temperature 25°C ) S – T:5.54 T3 – T1:2.72
Refrigerant amount at shipment kg R 22 - 4.0 R 22 - 4.3

Safety devices Internal type External type Internal type External type

Overload relay models —

FMSA -1SZ607A

—

FMSA -1SZ607A

Operating temperature Open °C 120 ±5— 130—

Close °C 98 ± 11 — 61 —
Operating ampere (at 25°C) A — 6 A, 110 % — 10 A, 110 %
Run capacitor V, µF—

High pressure switch ACB - 1TB07

Set pressure OFF kg/cm

2

30

ON kg/cm

2

24 ± 2.0

Fan (Number...diameter) mm Propeller (2...ø460)
Fan motor

Model...Nominal output W KFC6S - 91C5PX2...100WX2
No. of pole...rpm (230 V, High) rpm 6...871
Coil resistance Ω BRN–WHT : 61.0

(Ambient temperature 20°C) WHT–YEL : 64.3

YEL–PNK : 17.7

Safety device

Operating temperature Open °C130±8

Close °C79±15

Run capacitor VAC, µF 440V,5 µF/440 V,5 µF

Heat exchanger

Coil Aluminum plate fin / Copper tube
Rows...fin pitch mm

2

2...2.0

Face area m

2

1.08

+ 2.0
+ 0.5

– 12 –

1

1-3 Other Component Specifications

(A) Indoor Unit

CA250X5TAA CA360X5TAA CA480X5TAA

Power Transformer ATR – I75A

Rated Primary AC 230 V, 50 Hz

Secondary 10.6 V, 0.93 A

Capacity 9.85 VAC
Coil resistance WHT - WHT : 96.5 , BRN - BRN : 0.8 (at 20 °C)
Thermistor cut off temperature °C 150

Thermistor (Coil sensor) PBC - 41E - S26 PBC - 41E - S36

Coil resistance k –10 °C : 23.7 , 5 °C : 12.1

–5 °C : 18.8 , 10 °C : 9.7

0 °C : 15.0 , 15 °C : 8.0

Thermistor (Room or coil sensor) KTEC - 35 - S6

Coil resistance k 0 °C : 16.5 , 40 °C : 2.7

5 °C : 12.8 , 45 °C : 2.2
10 °C : 10.0 , 50 °C : 1.8
20 °C : 6.3 , 55 °C : 1.5
30 °C : 4.0 ,

Drain pump WP20SL - 21

Rated AC 230 V, 14.7 W

Float switch FS - 0218 - 103

Rated (Contact rated) AC 230 V, 50 W
Switch Ass'y SW - X363GS
Indicator Lamp Ass' IND - X253GS
Synchronized Motor M2LB24ZA12

1.SPECIFICATIONS

– 13 –

1

(B) Outdoor Unit

MODEL No GR250X7TAA GR360X7TAA GR480X7TAA

Compressor Motor Magnetic Contactor FMSA - 1SZ607A

Coil rated AC 220 - 240 V, 50 Hz

Coil resistance (at 20°C) 828 (at 20 °C)

Contact rated V, A AC 440 V, 13 A

Thermal Relay

Contact rated V, A AC 220 V, 2.25 A

Rated ampere (90 / 120%) A 6 A, 110 % 6 A, 110 % 10 A, 110 %

Auxiliary relay HH62S / 085

Coil rated A AC 240 V, 50 Hz

Coil resistance kW 15.5 ± 20 %

Contact rated A AC 250 V, 10A

Relay RDR - S400

Rated voltage V AC 380 - 415 V, 3 phase, 50 Hz

Resistance (at 20°C) k R - T : 76.3

Thermostat (Coil sensor) YTB - S377

Operating Temperature °C 27.5 ± 1.5 OFF (High)

25.5 ON (Low)

Contact ratedAC 250 V, 1 A

MODEL No GR250X5TAA

Compressor Motor Mgnetic ContactorFMCA - 1SZ607

Coil rated AC 220 - 240 V, 50 Hz
Coil resistance (at 20°C) 828 ± 15 %
Contact rated V, A AC 440 V, 13 A

Auxiliary relay HH62S / 085

Coil rated AC 240 V, 50 Hz
Coil resistance (at 20°C) k 17.2
Contact rated V, A AC 220 V, 5 A

Thermostat (Coil sensor) YTB - S377

Operating Temperature °C 27.5 ± 1.5 OFF (High)

25.5 ON (Low)

Contact rated A AC 250 V, 1 A

+ 1.5
– 0.5

+ 1.5
– 0.5

1.SPECIFICATIONS

– 14 –

(A)Indoor Unit:CA250X5TAA

860

100

760

500

500

298 30

205

125

12

12

48

860

820 (Ceiling opening)

820 (Ceiling opening)

61

730 (Suspention bolt pitch)

Panel center

590 (Suspention bolt pitch)

345 35

Air intake grille
Air outlet
Refrigerant liquid line (ø 6.35)
Refrigerant gas line (ø 15.88)
Drain connection
Power supply entry
For discharge duct

Suspention bolt mounting

342 15

X-view

0410_X_S

207

100

205

61

760

50 150

255

207

8

8

1.SPECIFICATIONS

1-4Dimensional Data

– 15 –

(A)Indoor Unit:CA360X5TAA, CA480X5TAA

1150

1050

790

500

328

30

218

125

860

1110 (Ceiling opening)

820 (Ceiling opening)

61

1020 (Suspention bolt pitch)

Panel center

590 (Suspention bolt pitch)

490 40

Air intake grille
Air outlet
Refrigerant liquid line (ø9.52)
(SPW-X303G56, SPW-X303GS56 ø6.35)
Refrigerant gas line (ø19.05)
(SPW-X303G56, SPW-X303GS56 ø15.88)
Drain connection
Power supply entry
For discharge duct

Suspension bolt mounting

X-view

0603_X_S

218

14535

210

60

760

70 165

285

210

100 100

8

8

342 15

12

48

12

1.SPECIFICATIONS

– 16 –

(B) Outdoor Unit :GR250X5TAA

GR250X7TAA

400

380

20

340

20

110660170

735

280

307

940

Dimension : mm

Hole for anchor bolt (4-ø13)
Refrigerant tube joint (narrow tube)
Flare connection 1/4 in (6.35 mm)
Refrigerant tube joint (wide tube)
Flare connection 5/8 in (15.88 mm)
Refrigerant tubing inlet
Power supply inlet

0411_C_S

1.SPECIFICATIONS

1-4Dimensional Data

– 17 –

(B) Outdoor Unit :GR360X7TAA

GR480X7TAA

400

380

20

340

20

110660170

1235

580

607

940

Dimension : mm

Hole for anchor bolt (4-ø13)
Refrigerant tube joint (narrow tube)
Flare connection 3/8 in (9.52 mm)
Refrigerant tube joint (wide tube)
Flare connection 3/4 in (19.05 mm)
Refrigerant tubing inlet
Power supply inlet

0412_C_S

1.SPECIFICATIONS

– 18 –

Indoor Unit :CA250X5TAA

Outdoor Unit:GR250X5TAA

GR250X7TAA

Indoor Unit :CA360X5TAA Outdoor Unit:GR360X7TAA

O. D.

15.88 mm
(5/8")

Evaporator

Capillary

O. D.

6.35 mm
(1/4")

Condenser

Compressor

Accumulator

Capillary

Sub-condenser

Wide tube
service valve

Narrow tube
service valve

0664_X_S

Strainer

Strainer

HP

High
pressure
switch

O. D.

19.05 mm
(3/4")

Evaporator

Capillary

O. D.

9.52 mm
(3/8")

Condenser

HP

High

pressure

switch

Compressor

Accumulator

Capillary

Sub-condenser

Wide tube
service valve

0605_X_S

Narrow tube
service valve

Strainer

Strainer

1.SPECIFICATIONS

1-5Refrigerant Flow Diagram

– 19 –

Indoor Unit :CA480X5TAA

Outdoor Unit:GR480X7TAA

Insulation of Regrigerant Tubing

IMPORTANT

To prevent heat loss and wet floors due to
dripping of condensation, both the wide and

narrow tubes must be well insulated with a
proper insulation material. The thickness of

the insulation should be a min. 8 mm.

After a tube has been
insulated, never try to bend
it into a narrow curve
because it can casue the
tube to break or crack.

Insulator
Thickness:
Min. 8mm

Narrow tube

Wide tube

0133_C_I

O. D.

19.05 mm
(3/4")

Evaporator

Capillary

O. D.

9.52 mm
(3/8")

Condenser

HP

High

pressure

switch

Compressor

Accumulator

Sub-condenser

Wide tube
service valve

0606_X_S

Narrow tube
service valve

Strainer

1.SPECIFICATIONS

– 20–

Temperature Indoor air intake temp. Outdoor air intake temp.

Maximum 35°C DB / 22.5°C WB 52°C DB

Minimum 18°C DB / 14°C WB 19°C DB

1.SPECIFICATIONS

1-6Operating Range

– 21 –

Indoor Unit :CA250X5TAA Outdoor Unit : GR250X7TAA

TC :Total Cooling Capacity (kW)
SHC:Sensible Heat Capacity (kW)
CI :Compressor Input (kW)

Rating conditions are

:Outdoor Ambient Temp. 35 °C DB
:Indoor Unit Entering Air Temp. 27 °C DB / 19 °C WB

RATING CAPACITY : 7.3 kW AIR FLOW RATE : 1140 m3/h
EVAPORATOR CONDENSER
ENT. TEMP. °C AMBIENT TEMP. C

WB DB 25 30 35 40 45 50

TC 7.37 7.03 6.67 6.26 5.81 5.34

CI 2.32 2.48 2.66 2.92 3.19 3.45

21 SHC 4.9 4.7 4.5 4.3 4.1 3.8
23 SHC 5.4 5.2 5 4.8 4.6 4.4

15 25 SHC 6 5.8 5.6 5.4 5.2 4.9

27 SHC 6.5 6.3 6.2 5.9 5.7 5.34
29 SHC 7.1 6.9 6.67 6.26 5.81 5.34
31 SHC 7.37 7.03 6.67 6.26 5.81 5.34

TC 7.61 7.31 6.96 6.59 6.18 5.75

CI 2.38 2.55 2.74 3 3.27 3.53

21 SHC 4.1 4 3.8 3.7 3.5 3.3
23 SHC 4.7 4.6 4.4 4.2 4 3.8

17 25 SHC 5.3 5.1 4.9 4.8 4.6 4.4

27 SHC 5.8 5.7 5.5 5.3 5.1 4.9
29 SHC 6.4 6.2 6.1 5.9 5.7 5.5
31 SHC 6.9 6.8 6.6 6.4 6.18 5.75

TC 7.88 7.6 #7.3 6.94 6.54 6.1

CI 2.45 2.63 2.82 3.09 3.36 3.63

21 SHC 3.4 3.3 3.2 3 2.8 2.7
23 SHC 4 3.9 3.7 3.6 3.4 3.2

19 25 SHC 4.6 4.4 4.3 4.1 4 3.8

27 SHC 5.1 5 4.9 4.7 4.5 4.3
29 SHC 5.7 5.5 5.4 5.3 5.1 4.9
31 SHC 6.2 6.1 6 5.8 5.6 5.4

TC 8.14 7.85 7.56 7.21 6.86 6.46

CI 2.52 2.7 2.9 3.18 3.45 3.73

23 SHC 3.3 3.2 3 2.9 2.8 2.6

21 25 SHC 3.8 3.7 3.6 3.5 3.3 3.2

27 SHC 4.4 4.3 4.2 4 3.9 3.7
29 SHC 5 4.8 4.7 4.6 4.4 4.3
31 SHC 5.5 5.4 5.3 5.1 5 4.8

TC 8.42 8.17 7.88 7.59 7.24 6.88

CI 2.59 2.77 2.98 3.26 3.54 3.82

23 25 SHC 3.1 3 2.9 2.8 2.7 2.6

27 SHC 3.7 3.6 3.5 3.4 3.2 3.1
29 SHC 4.2 4.2 4 3.9 3.8 3.7
31 SHC 4.8 4.7 4.6 4.5 4.4 4.2

TC 8.76 8.45 8.2 7.91 7.61 7.27

CI 2.67 2.86 3.03 3.34 3.64 3.93

25 27 SHC 3 2.9 2.8 2.7 2.6 2.5

29 SHC 3.6 3.4 3.4 3.3 3.2 3
31 SHC 4.1 4 3.9 3.8 3.7 3.6

1.SPECIFICATIONS

1-7Cooling Capacity

– 22 –

Indoor Unit :CA250X5TAA Outdoor Unit : GR250X7TAA

TC :Total Cooling Capacity (kW)
SHC:Sensible Heat Capacity (kW)
CI :Compressor Input (kW)

Rating conditions are

:Outdoor Ambient Temp. 35 °C DB
:Indoor Unit Entering Air Temp. 27 °C DB / 19 °C WB

RATING CAPACITY : 7.3 kW AIR FLOW RATE : 1140 m3/h
EVAPORATOR CONDENSER
ENT. TEMP. °C AMBIENT TEMP. C

WB DB 25 30 35 40 45 50

TC 7.37 7.03 6.67 6.26 5.81 5.34

CI 2.03 2.17 2.33 2.5 2.67 2.84

21 SHC 4.9 4.7 4.5 4.3 4.1 3.8
23 SHC 5.4 5.2 5 4.8 4.6 4.4

15 25 SHC 6 5.8 5.6 5.4 5.2 4.9

27 SHC 6.5 6.3 6.2 5.9 5.7 5.34
29 SHC 7.1 6.9 6.67 6.26 5.81 5.34
31 SHC 7.37 7.03 6.67 6.26 5.81 5.34

TC 7.61 7.31 6.96 6.59 6.18 5.75

CI 2.08 2.23 2.4 2.57 2.74 2.91

21 SHC 4.1 4 3.8 3.7 3.5 3.3
23 SHC 4.7 4.6 4.4 4.2 4 3.8

17 25 SHC 5.3 5.1 4.9 4.8 4.6 4.4

27 SHC 5.8 5.7 5.5 5.3 5.1 4.9
29 SHC 6.4 6.2 6.1 5.9 5.7 5.5
31 SHC 6.9 6.8 6.6 6.4 6.18 5.75

TC 7.88 7.6 #7.3 6.94 6.54 6.1

CI 2.15 2.3 2.47 2.65 2.82 3

21 SHC 3.4 3.3 3.2 3 2.8 2.7
23 SHC 4 3.9 3.7 3.6 3.4 3.2

19 25 SHC 4.6 4.4 4.3 4.1 4 3.8

27 SHC 5.1 5 4.9 4.7 4.5 4.3
29 SHC 5.7 5.5 5.4 5.3 5.1 4.9
31 SHC 6.2 6.1 6 5.8 5.6 5.4

TC 8.14 7.85 7.56 7.21 6.86 6.46

CI 2.21 2.37 2.54 2.72 2.9 3.08

23 SHC 3.3 3.2 3 2.9 2.8 2.6

21 25 SHC 3.8 3.7 3.6 3.5 3.3 3.2

27 SHC 4.4 4.3 4.2 4 3.9 3.7
29 SHC 5 4.8 4.7 4.6 4.4 4.3
31 SHC 5.5 5.4 5.3 5.1 5 4.8

TC 8.42 8.17 7.88 7.59 7.24 6.88

CI 2.27 2.43 2.61 2.79 2.98 3.16

23 25 SHC 3.1 3 2.9 2.8 2.7 2.6

27 SHC 3.7 3.6 3.5 3.4 3.2 3.1
29 SHC 4.2 4.2 4 3.9 3.8 3.7
31 SHC 4.8 4.7 4.6 4.5 4.4 4.2

TC 8.76 8.45 8.2 7.91 7.61 7.27

CI 2.34 2.51 2.66 2.86 3.07 3.26

25 27 SHC 3 2.9 2.8 2.7 2.6 2.5

29 SHC 3.6 3.4 3.4 3.3 3.2 3
31 SHC 4.1 4 3.9 3.8 3.7 3.6

1.SPECIFICATIONS

– 23 –

Indoor Unit :CA360X5TAA Outdoor Unit : GR360X7TAA

TC :Total Cooling Capacity (kW)
SHC:Sensible Heat Capacity (kW)
CI :Compressor Input (kW)

Rating conditions are

:Outdoor Ambient Temp. 35 °C DB
:Indoor Unit Entering Air Temp. 27 °C DB / 19 °C WB

RATING CAPACITY : 10.6 kW AIR FLOW RATE : 1920 m3/h
EVAPORATOR CONDENSER
ENT. TEMP. °C AMBIENT TEMP. C

WB DB 25 30 35 40 45 50

TC 10.7 10.21 9.69 9.08 8.44 7.76

CI 2.11 2.25 2.42 2.63 2.86 3.07

21 SHC 7.3 7 6.8 6.5 6.2 5.9
23 SHC 8.2 8 7.7 7.4 7.1 6.8

15 25 SHC 9.1 8.9 8.6 8.3 8 7.7

27 SHC 10.1 9.8 9.6 9.08 8.44 7.76
29 SHC 10.7 10.21 9.69 9.08 8.44 7.76
31 SHC 10.7 10.21 9.69 9.08 8.44 7.76

TC 11.06 10.61 10.11 9.57 8.98 8.34

CI 2.16 2.31 2.48 2.71 2.93 3.15

21 SHC 6.1 5.9 5.7 5.5 5.2 4.9
23 SHC 7.1 6.9 6.6 6.4 6.1 5.8

17 25 SHC 8 7.8 7.6 7.3 7.1 6.8

27 SHC 8.9 8.7 8.5 8.3 8 7.7
29 SHC 9.9 9.7 9.4 9.2 8.9 8.34
31 SHC 10.8 10.6 10.11 9.57 8.98 8.34

TC 11.45 11.03 #10.6 10.07 9.5 8.85

CI 2.23 2.39 2.56 2.79 3.01 3.24

21 SHC 5 4.8 4.6 4.4 4.2 3.9
23 SHC 5.9 5.7 5.6 5.3 5.1 4.8

19 25 SHC 6.9 6.7 6.5 6.3 6 5.8

27 SHC 7.8 7.6 7.4 7.2 7 6.7
29 SHC 8.7 8.5 8.4 8.1 7.9 7.6
31 SHC 9.7 9.5 9.3 9.1 8.8 8.6

TC 11.82 11.41 10.97 10.47 9.96 9.38

CI 2.29 2.45 2.63 2.86 3.1 3.33

23 SHC 4.8 4.6 4.4 4.2 4.1 3.8

21 25 SHC 5.7 5.5 5.4 5.2 5 4.8

27 SHC 6.6 6.5 6.3 6.1 5.9 5.7
29 SHC 7.6 7.4 7.2 7 6.8 6.6
31 SHC 8.5 8.3 8.2 8 7.8 7.6

TC 12.22 11.86 11.45 11.02 10.52 9.99

CI 2.35 2.52 2.7 2.94 3.17 3.41

23 25 SHC 4.6 4.4 4.3 4.1 3.9 3.8

27 SHC 5.5 5.4 5.2 5.1 4.9 4.7
29 SHC 6.4 6.3 6.1 6 5.8 5.6
31 SHC 7.4 7.2 7.1 6.9 6.7 6.6

TC 12.72 12.27 11.9 11.49 11.05 10.56

CI 2.43 2.6 2.75 3.01 3.27 3.51

25 27 SHC 4.4 4.2 4.1 4 3.8 3.7

29 SHC 5.3 5.1 5 4.9 4.7 4.6
31 SHC 6.2 6.1 6 5.8 5.7 5.5

1.SPECIFICATIONS

– 24 –

Indoor Unit :CA480X5TAA Outdoor Unit : GR480X7TAA

TC :Total Cooling Capacity (kW)
SHC:Sensible Heat Capacity (kW)
CI :Compressor Input (kW)

Rating conditions are

:Outdoor Ambient Temp. 35 °C DB
:Indoor Unit Entering Air Temp. 27 °C DB / 19 °C WB

RATING CAPACITY : 14 kW AIR FLOW RATE : 1920 m3/h
EVAPORATOR CONDENSER
ENT. TEMP. °C AMBIENT TEMP. C

WB DB 25 30 35 40 45 50

TC 14.13 13.48 12.8 12 11.14 10.25

CI 3.43 3.67 3.94 4.34 4.76 5.17

21 SHC 9.1 8.8 8.4 8 7.5 7
23 SHC 10.1 9.7 9.3 8.9 8.4 8

15 25 SHC 11 10.6 10.2 9.8 9.4 8.9

27 SHC 11.9 11.6 11.2 10.8 10.3 9.8
29 SHC 12.9 12.5 12.1 11.7 11.14 10.25
31 SHC 13.8 13.4 12.8 12 11.14 10.25

TC 14.6 14.01 13.36 12.64 11.86 11.02

CI 3.52 3.77 4.04 4.46 4.88 5.29

21 SHC 7.9 7.6 7.3 6.9 6.5 6.1
23 SHC 8.8 8.5 8.2 7.8 7.5 7.1

17 25 SHC 9.8 9.5 9.1 8.8 8.4 8

27 SHC 10.7 10.4 10.1 9.7 9.3 8.9
29 SHC 11.6 11.3 11 10.6 10.3 9.9
31 SHC 12.6 12.3 11.9 11.6 11.2 10.8

TC 15.12 14.57 #14 13.3 12.54 11.69

CI 3.63 3.89 4.17 4.59 5.02 5.44

21 SHC 6.7 6.4 6.2 5.8 5.5 5.1
23 SHC 7.6 7.4 7.1 6.8 6.4 6

19 25 SHC 8.6 8.3 8 7.7 7.3 7

27 SHC 9.5 9.2 8.9 8.6 8.3 7.9
29 SHC 10.4 10.2 9.9 9.6 9.2 8.8
31 SHC 11.4 11.1 10.8 10.5 10.1 9.8

TC 15.61 15.06 14.49 13.83 13.16 12.39

CI 3.73 3.99 4.29 4.72 5.15 5.58

23 SHC 6.4 6.1 5.9 5.6 5.3 5

21 25 SHC 7.3 7.1 6.8 6.5 6.3 5.9

27 SHC 8.2 8 7.7 7.5 7.2 6.9
29 SHC 9.2 8.9 8.7 8.4 8.1 7.8
31 SHC 10.1 9.9 9.6 9.3 9 8.7

TC 16.14 15.67 15.12 14.56 13.89 13.19

CI 3.83 4.1 4.4 4.84 5.28 5.72

23 25 SHC 6.1 5.9 5.7 5.4 5.2 4.9

27 SHC 7 6.8 6.6 6.4 6.1 5.8
29 SHC 7.9 7.7 7.5 7.3 7 6.8
31 SHC 8.9 8.7 8.5 8.2 8 7.7

TC 16.8 16.21 15.72 15.18 14.59 13.94

CI 3.95 4.23 4.49 4.96 5.43 5.88

25 27 SHC 5.8 5.6 5.4 5.2 5 4.8

29 SHC 6.7 6.5 6.3 6.1 5.9 5.7
31 SHC 7.7 7.4 7.3 7.1 6.9 6.6

1.SPECIFICATIONS

– 25 –

60

50

40

30

20

10

OCTAVE BAND SOUND PRESSURE LEVEL, dB

(0 dB = 0.0002 µbar)

63 125 250 500 1000200040008000

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

BAND CENTER FREQUENCIES, Hz

NC-20

NC-40

NC-50

NC-30

MODEL :GR250X5TAA

:GR250X7TAA

SOUND LEVEL:53dB(A), NC45

CONDITION :Distance1m,Height1m
SOURCE :220 - 230 - 240 V, 1Phase, 50Hz

: 380 - 400 - 415 V, 3Phase, 50Hz

MODEL :CA250X5TAA
SOUND LEVEL:HIGH37dB(A),NC30

LOW 31dB(A),NC22
CONDITION :Distance1 m,Under the unit1.5 m
SOURCE :220 - 230 - 240V,1Phase,50Hz

REMARKS:1.Value obtained in the actual place where the unit is installed may be slightly higher than

the values shown in this graph because of the conditions of operation, the structure of
the building, the background noise and other factors.

2.The test results were obtained from an anechoic room.

NOTE To evaluate “Noise level” the maximum number of the measured OCTAVE BAND

SOUND PRESSURE LEVEL is used. Read the number on each BAND CENTER
FREQUENCIES (horizontal axis) ranging from 63Hz to 8000Hz and select the maximum
value (vertical axis) among them.

90

80

70

60

50

40

30

20

10

60 125

250

500

100020004000

8000

APPROXIMATE
THRESHOLD OF
CONTINUOUS
NOISE

NC-70

NC-50

NC-60

NC-40

NC-30

NC-20

OCTAVE BAND SOUND PRESSURE LEVEL, dB

(0dB=0.0002 µbar)

BAND CENTER FREQUENCIES, Hz

60

50

40

30

20

10

OCTAVE BAND SOUND PRESSURE LEVEL, dB

(0dB=0.0002 µbar)

63 125 250 500 1000200040008000

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

BAND CENTER FREQUENCIES, Hz

NC-20

NC-40

NC-50

NC-30

MODEL :CA360X5TAA
SOUND LEVEL:HIGH43dB(A),NC36

LOW 36dB(A), NC24

CONDITION :Distance1 m,Under the unit1.5 m
SOURCE :220 - 230 - 240V,1Phase,50Hz

90

80

70

60

50

40

30

20

10

60 125

250

500

100020004000

8000

APPROXIMATE
THRESHOLD OF
CONTINUOUS
NOISE

NC-70

NC-50

NC-60

NC-40

NC-30

NC-20

OCTAVE BAND SOUND PRESSURE LEVEL, dB

(0dB=0.0002 µbar)

BAND CENTER FREQUENCIES, Hz

MODEL : GR360X7TAA
SOUND LEVEL:54dB(A), NC45

CONDITION :Distance1 m,Height1 m
SOURCE : 380 - 400 - 415 V, 3Phase, 50Hz

1.SPECIFICATIONS

1-8Noise Criterion Curves

– 26 –

REMARKS:1.Value obtained in the actual place where the unit is installed may be slightly higher than

the values shown in this graph because of the conditions of operation, the structure of
the building, the background noise and other factors.

2.The test results were obtained from an anechoic room.

NOTE To evaluate “Noise level” the maximum number of the measured OCTAVE BAND

SOUND PRESSURE LEVEL is used. Read the number on each BAND CENTER
FREQUENCIES (horizontal axis) ranging from 63Hz to 8000Hz and select the maximum
value (vertical axis) among them.

MODEL :CA480X5TAA
SOUND LEVEL:HIGH43dB(A),NC36

LOW 36dB(A),NC24
CONDITION :Distance1m,Under the unit1.5 m
SOURCE :220 - 230 - 240V,1Phase, 50Hz

MODEL :GR480X7TAA
SOUND LEVEL:56dB(A), NC47

CONDITION :Distance1 m,Height1 m
SOURCE :380 - 400 - 415 V,3Phase, 50Hz

60

50

40

30

20

10

OCTAVE BAND SOUND PRESSURE LEVEL, dB

(0dB=0.0002 µbar)

63 125 250 500 1000200040008000

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

BAND CENTER FREQUENCIES, Hz

NC-20

NC-40

NC-50

NC-30

90

80

70

60

50

40

30

20

10

63 125 250 500 1000200040008000

BAND CENTER FREQUENCIES, Hz

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

NC-70

NC-50

NC-20

NC-60

NC-40

NC-30

OCTAVE BAND SOUND PRESSURE LEVEL, dB

(0dB=0.0002 µbar)

1.SPECIFICATIONS

– 27 –

MODEL : CA250X5TAA

0123456

0

1

2

3

4

HORIZONTAL DISTANCE (m)

AXIS AIR VELOCITY (m/s)

VERTICAL DISTANCE (m)

AXIS AIR VELOCITY

FAN SPEED

COOLING

ROOM AIR TEMP.
LOUVER ANGLE

HIGH

27˚
30˚

: COOLING
: 0.3 m/s

0659_X_S

MODEL : CA360X5TAA

CA480X5TAA

0123456

0

1

2

3

4

HORIZONTAL DISTANCE (m)

AXIS AIR VELOCITY (m/s)

VERTICAL DISTANCE (m)

AXIS AIR VELOCITY

FAN SPEED

COOLING

ROOM AIR TEMP.
LOUVER ANGLE

HIGH

27˚
30˚

: COOLING
: 0.3 m/s

0661_X_S

1.SPECIFICATIONS

1-9 Air Throw Distance Chart

– 28 –

2

2-1 Room T emperature Control

The Unit adjusts room temperature by turning the outdoor unit’s compressor ON and OFF.
This process is controlled by the thermostat located in the remote control unit.
The figures on this and the next pages show how each part of the system performs when
the room temperature changes and the thermostat activates the compressor to start
(thermo ON) or stop (thermo OFF). Fig. 6 shows about the cooling cycle.

Fig. 6

THERMO ON

ROOM TEMPERATURE

THERMO ON

S. T.+0.5°C
SET TEMP. T°C
(S.T.)

COMPRESSOR

OFF

OFF

WITHIN 3 MINUTE

MORE THAN
5 MINUTES

ON

ON ON

0607_X_S

OFF OFF

INDOOR FAN

OUTDOOR FAN

SET SPEED (MANUAL)

THERMO OFF
3 MINUTES

THERMO OFF

MORE THAN 3 MINUTES

ON ON

ON

Chart Summary and Explanations

❑ Once the compressor starts, it keeps running for 5 minutes.
❑ Once the compressor stops, it will not start running again for 3 minutes.
❑ If you change the operation mode during the cooling cycle, the control circuit stops the

compressor for 3 minutes.

❑ For 5 minutes after the compressor is first turned on, and for 3 minutes after it is turned off,

the compressor is not controlled by the room sensor.

❑ Thermo ON: When room temperature rises 0.5°C above the set temperature T˚,

(T˚+0.5 °C):

Compressor ➞ ON

❑ Thermo OFF: When the room temperature is equal to or below the set temperature T˚:

Compressor ➞ OFF

❑ In case of wireless remote control model (GS type).

• The remote control unit sends the temperature signal to the air conditioner regularly at 3
minute intervals. If the signal from the remote control unit stops for more than 10 minutes
due to the damage of the remote control unit or other trouble, the air conditioner will
switch to the temperature sensor which is built in the indoor unit and control the room
temperature. In these cases, the temperature around the remote contorl unit may differ
from the temperature detected at the air conditioner’s position.

• If the remote control is located near a heat source, such as a space heater or in direct
sunlight, press the A/C SENSOR button to switch to the sensor in the indoor unit.

2.PROCESSES AND FUNCTIONS

– 29 –

2

2-2 Freeze Prevention

Freeze Prevention keeps the indoor heat exchange coil from freezing. Freezing reduces
the efficiency of the unit, and frost buildup on the coil blocks cool air circulation from the
indoor unit’s fan.

Fig. 7

2-3 Drain Pump Control

Drain pump operates when compressor starts to operate or when Float Switch turns off.

COMPRESSOR

OUTDOOR FAN

INDOOR FAN

OFF

OFF OFF

OFF

INDOOR COIL
TEMPERATURE

MORE THAN 10 MINUTES

FREEZE
PREVENTION

6 MINUTES 10 MINUTES

FREEZE
PREVENTION

6 MINUTES

(THERMO OFF)

(THERMO ON)

–1°C

ON

ON

ON

ON

ON

ON

0608_X_S

SET SPEED

Fig. 8

ON

ON

ON

ON

ON

ON

ON

ON

ON

ON

SET SPEED

OFF

OFF

OFF

OFF

OFF

OFF

FLOAT SWITCH

ON: low water level
OFF: high water level

COMPRESSOR

DRAIN PUMP

OUTDOOR FAN

INDOOR FAN

20 MINUTES

0609_X_S

2.PROCESSES AND FUNCTIONS

– 30 –

2

2-4 Outdoor Fan Control

• In low outdoor temperature, the outdoor fan is set automatically from HIGH to LOW to
prevent the indoor heat exchanger from freezing.

• When the outdoor temperature falls below 25.5°C, the outdoor fan is set from HIGH to
LOW automatically. When the outdoor temperature rises to 27.5°C, the outdoor fan is
set from LOW to HIGH automatically.

2.PROCESSES AND FUNCTIONS

– 31 –

3.ELECTRICAL DATA

Indoor Unit Outdoor Unit

Complete Unit

Fan Motor Fan Motor Compressor

Performance at 220 - 240 V / 1 phase / 50 Hz 220 - 240 V / 1 phase / 50 Hz

Rating conditions

A 0.60 / 0.63 0.75 / 0.78 13.32 / 13.74 14.67 / 15.15

kW 0.13 / 0.15 0.17 / 0.19 2.76 / 2.82 3.06/ 3.16

Full load conditions

A 0.60 / 0.63 0.75 / 0.78 18.87/18.03 20.22 / 19.44

kW 0.13 / 0.15 0.17 / 0.19 3.92/ 3.93 4.22 / 4.27

Starting amperes A 1 / 1 1 / 1 67 / 73 69 / 75

Rating Conditions :Indoor Air Temperature 27 °C DB / 19 °C WB

Outdoor Air Temperature35 °C DB

Full Load Conditions:Indoor Air Temperature 35 °C DB / 22.5 °C WB

Outdoor Air Temperature52 °C DB

Indoor model : CA250X5TAA /Outdoor model : GR250X5TAA

Indoor model : CA250X5TAA /Outdoor model : GR250X7TAA

Indoor Unit Outdoor Unit

Complete Unit

Fan Motor Fan Motor Compressor

Performance at 220 - 240 V / 1 phase / 50 Hz 380 - 415 V / 3 phase / 50 Hz

Rating conditions

A 0.60 / 0.63 0.75 / 0.78 4.32 / 4.20 4.74 / 4.62

kW 0.13 / 0.15 0.17 / 0.19 2.46 / 2.47 2.76/ 2.81

Full load conditions

A 0.60 / 0.63 0.75 / 0.78 5.52/5.22 5.95 / 5.65

kW 0.13 / 0.15 0.17 / 0.19 3.27/ 3.26 3.56 / 3.59

Starting amperes A 1 / 1 1 / 1 25 / 28 27 / 30

Indoor model : CA360X5TAA /Outdoor model : GR360X7TAA

Indoor Unit Outdoor Unit

Complete Unit

Fan Motor Fan Motor Compressor

Performance at 220 - 240 V / 1 phase / 50 Hz 380 - 415 V / 3 phase / 50 Hz

Rating conditions

A 0.92 / 0.93 1.51 / 1.56 4.46 / 4.37 5.21 / 5.11

kW 0.20 / 0.22 0.33 / 0.37 2.54 / 2.56 3.07 / 3.15

Full load conditions

A 0.92 / 0.93 1.51 / 1.56 5.96 / 5.64 6.72 / 6.41

kW 0.20 / 0.22 0.33 / 0.37 3.53 / 3.51 4.06 / 4.10

Starting amperes A 2 / 2 3 / 3 27 / 30 31 / 34

3-1 Electrical characteristics

– 32 –

3.ELECTRICAL DATA

Indoor model : CA480X5TAA /Outdoor model : GR480X7TAA

Indoor Unit Outdoor Unit

Complete Unit

Fan Motor Fan Motor Compressor

Performance at 220 - 240 V / 1 phase / 50 Hz 380 - 415 V / 3 phase / 50 Hz

Rating conditions

A 0.92 / 0.93 1.51 / 1.56 7.66 / 8.19 8.37 / 8.86

kW 0.20 / 0.22 0.33 / 0.37 4.17 / 4.27 4.70 / 4.86

Full load conditions

A 0.92 / 0.93 1.51 / 1.56 10.18 / 10.07 10.93 / 10.81

kW 0.20 / 0.22 0.33 / 0.37 5.87 / 5.88 6.40 / 6.48

Starting amperes A 2 / 2 3 / 3 66 / 70 71 / 75

Rating Conditions :Indoor Air Temperature 27 °C DB / 19 °C WB

Outdoor Air Temperature35 °C DB

Full Load Conditions:Indoor Air Temperature 35 °C DB / 22.5 °C WB

Outdoor Air Temperature52 °C DB

– 33 –

TH1 (Coil)

31

DP

DPH

Connector

9P(WHT)

31

FS

21

31

31

31

3175315

213

213

1234
1SP234

123456789
1

P
S

23456789

1

To Outdoor Unit
Power Supply

Terminal Plate(4P)

Connector
4P(WHT)

• Electric Wiring Diagram

2 3 4

GRN/YEL

GRN/YEL

GRN/YEL

GRN/YEL

Earth
Terminal

Earth
Terminal

Earth
Terminal

YEL

ORG

VLT

WHT

GRY

GRY

PNK

BRN

BLK

YEL

WHT

GRY

BLK

BLK

GRY

WHT

YEL

BLK

BLK

FMI

LM

Controller (CR-X363GS)

E

2P(RED)

TH1

TH2 (Room)

21

BLK

BLK

2P(YEL)

TH2 DPH

3P(RED)LM3P(GRN)

21

TR

PS

21

2P(WHT)

PRY

2P(WHT)

SEC

3P(BLU)DP3P(RED)

FS

3P(WHT)

49FMI

FM

COM

5P(WHT)

SUP

BLK

BLK

BLK

BLK

WHT

WHT

RED

WHT

BRN

BRN

BRN

7P(WHT)

MHL

7P(WHT)3P(WHT)

71

71

IND Lamp
Assy

Switch
Assy

RED

ORG

BRN

C

ORG

VLT

WHT

GRY

GRY

PNK

BRN

BRN

(A) Indoor Unit

CA250X5TAA, CA360X5TAA, CA480X5TAA

3.ELECTRICAL DATA

3-2 Electric Wiring Diagrams / Schematic Diagrams

– 34 –

• Schematic Diagram

2

1

3

1

3

1
2

IND

3

1
2

717

1

SW

TR

Coil

TH1

2

1

Room

TH2

FS

CR-X363GS

Controller

1

3

5

F

2

1

2

1

3

DP

DPH

RY2

RY1

RY3

RY4

RY5

3

4

LM

1

3

RY3

4P-1

4P-4

1

4P-2

RY5

FMI

C

12

1

735

456

RY1

RY2 RY2

HLM

3

2

1

1

18

3

49FMI

9

RY4

RY4

Symbols Description

FMI
49FMI
C
F
DP
DPH
LM
TR
RY1-RY5
FS
TH1
TH2

Indoor Fan Motor
Indoor Motor Thermal Protector
Capacitor
Fuse
Drain Pump
Dew Proof Heater
Auto Louver Motor
Power Transformer
Auxiliary Relay
Float Switch
Thermistor (Indoor Coil)
Room Thermistor

Symbols Description

CR-X363GS
IND
SW

Indoor Controller
Indicator Lamp Assy
Switch Assy
Terminal Plate
Connector
Terminal

CA250X5TAA, CA360X5TAA, CA480X5TAA

3.ELECTRICAL DATA

– 35 –

CM

FM

C1

C2

YEL

WHT

GRY

BRN

PNK

45
452323

1
1

Connector

6P (WHT)

Connector 2P (WHT) 63PH

313213

14

TWSVR

UAB

OLR

PS

Earth
Terminal

C

R

S

GRN/YEL GRN/YEL

GRN/YEL

52C

5

7

8

13

Relay

121

2

6

24

1Y

Power Supply

50Hz 1ø 220 V To Indoor Unit

Terminal
Plate

1
2

4
L
N

WHT
PNK

WHT
PNK

WHT

WHT

RED

BRN

RED

WHT

BLK

WHT

BLU

RED

RED

WHT

• Electric Wiring Diagram

W 854-2-5268-461-00-1 (AE425SCE)

P
S

C

HL

23S

YEL

WHT

GRY

BRN

PNK

RED

RED

(B) Outdoor Unit

GR250X5TAA

3.ELECTRICAL DATA

3-2 Electric Wiring Diagrams / Schematic Diagrams

– 36 –

1

2

1Y 52C

4

1

2

N

L

S
V

R
U

1Y

C1

63PH

C2

52C

OLR

23S

FM

CM

LH

C

45

123

W
T

52C

• Schematic Diagram

Symbols Description

CM
FM
52C
63PH
23S
C1, 2
OLR
1Y

Compressor motor
Fan Motor
Compressor Motor Magnetic Contactor
High Pressure Switch
Fan Speedcontrol Thermostat
Capacitor
Overload relay
Auxiliary Relay
Connector
Terminal Plate

GR250X5TAA

3.ELECTRICAL DATA

– 37 –

CM

FM

C

YEL

WHT

GRY

BRN

PNK

YEL

WHT

GRY

BRN

PNK

45
45

23
23

1
1

Connector
6P (WHT)

P
S

Connector 2P (WHT) 63PH

313213

14

TWSVR

U

642

A

B
95
9651C

C

PS

HL

23S

49C

Earth
Terminal

R

S

T

GRN/YEL GRN/YEL

GRN/YEL

52C

46
35
8

Relay

S

BATR

C

7

121

2

1Y

47C

Power Supply

50Hz 3ø 380 V / 415 V To Indoor Unit

Terminal
Plate

1
2

4
5
6
7
8

L1
L2
L3

N

PNK

BRN

ORG

WHT

WHT
PNK

PNK

BLU

RED

PNK

YEL

RED

WHT

BLU

ORG

RED

WHT

WHT

BLU

RED

RED

GRY

WHT

ORG

• Electric Wiring Diagram

GR250X7TAA

3.ELECTRICAL DATA

– 38 –

1

2

1

AB

S

T

R

C

47C

49C

2

4

52C

1Y

47C

5

6

7

8

L1

L2

L3

N

C

FM

LH

63PH

C

23S

45

123

52C

51C

• Schematic Diagram

Symbols Description

CM
FM
52C
51C
49C
47C
63PH
23S
C
1Y

Compressor motor
Fan Motor
Compressor Motor Magnetic Contactor
Compressor Motor Overcurrent Relay
Compressor Motor Thermal Protector
Negative Phase Relay
High Pressure Switch
Fan Speedcontrol Thermostat
Capacitor
Auxiliary Relay
Connector
Terminal Plate

13
14

5

95

96

51C

52C

1Y

3

CM

GR250X7TAA

3.ELECTRICAL DATA

– 39 –

CM

FM1

C1

YEL

WHT

GRY

BRN

PNK

YEL

WHT

GRY

BRN

PNK

45
452323

1
1

Connector

6P (WHT)

Connector 2P (WHT) 63PH

313213

14

TWSVR

U

642

A

B
95
9651C

PS

49C

Earth
Terminal

R

S

T

GRN/YEL GRN/YEL

GRN/YEL

GRN/YEL

52C

46
35
8

Relay

Relay

S

BATR

C

7

121

2

2Y

47C

Power Supply

50Hz 3ø 380 V / 415 V To Indoor Unit

Terminal
Plate

1
2

4
5
6
7
8

L1
L2
L3

N

PNK

BRN

ORG

WHT

WHT
PNK

PNK

BLU

RED

PNK

YEL

RED

WHT

BLU

ORG

GRY

RED

WHT

BLU

RED

RED

GRY

WHT

ORG

ORG

• Electric Wiring Diagram

P
S

FM2

C2

YEL

WHT

GRY

BRN

PNK

YEL

WHT

GRY

BRN

PNK

45
452323

1
1

Connector

6P (WHT)

P
S

3

8

7

14

5

1Y

2

6

C

H

L

23S

WHT

ORG

WHT

VLT
WHT

WHT

GR360X7TAA

3.ELECTRICAL DATA

– 40 –

1

2

1

C1

FM1

31

5

54

123

AB

S

T

R

C

47C

49C

H

2

4

52C

1Y

2Y

47C

5

6

7

8

L1

L2

L3

N

C2

FM2

42

L

23S

63PH

C

6

54

123

52C

51C

• Schematic Diagram

Symbols Description

CM
FM1, 2
52C
51C
49C
47C
63PH
23S
C1, 2
1Y, 2Y

Compressor motor

Fan Motor

Compressor Motor Magnetic Contactor

Compressor Motor Overcurrent Relay

Compressor Motor Thermal Protector

Negative Phase Relay

High Pressure Switch

Fan Speedcontrol Thermostat

Capacitor

Auxiliary Relay

Connector

Terminal Plate

13
14

5

95

96

51C

52C

2Y

3

CM

GR360X7TAA

3.ELECTRICAL DATA

– 41 –

CM

FM1

C1

YEL

WHT

GRY

BRN

PNK

YEL

WHT

GRY

BRN

PNK

45
452323

1
1

Connector

6P (WHT)

Connector 2P (WHT) 63PH

313213

14

TWSVR

U

642

A

B
95
9651C

PS

Earth
Terminal

T1

T2

T3

GRN/YEL GRN/YEL

GRN/YEL

GRN/YEL

52C

46
35
8

Relay

Relay

S

BATR

C

7

121

2

2Y

47C

Power Supply

50Hz 3ø 380 V / 415 V To Indoor Unit

Terminal
Plate

1
2

4
5
6
7
8

L1
L2
L3

N

PNK

PNK

BRN

ORG

WHT

WHT
PNK

PNK

BLU

RED

PNK

RED

WHT

BLU

GRY

RED

WHT

BLU

RED

RED

GRY

WHT

ORG

ORG

YEL

• Electric Wiring Diagram

P
S

FM2

C2

YEL

WHT

GRY

BRN

PNK

YEL

WHT

GRY

BRN

PNK

45
452323

1
1

Connector

6P (WHT)

P
S

3

8

7

14

5

1Y

2

6

C

H

L

23S

WHT

ORG

WHT

VLT
WHT

WHT

GR480X7TAA

3.ELECTRICAL DATA

– 42 –

1

2

1

C1

FM1

31

5

54

123

AB

S

T

R

C

47C

H

2

4

52C

1Y

2Y

47C

5

6

7

8

L1

L2

L3

N

C2

FM2

42

L

23S

63PH

C

6

54

123

52C

51C

• Schematic Diagram

Symbols Description

CM
FM1, 2
52C
51C
47C
63PH
23S
C1, 2
1Y, 2Y

Compressor motor
Fan Motor
Compressor Motor Magnetic Contactor
Compressor Motor Overcurrent Relay
Negative Phase Relay
High Pressure Switch
Fan Speedcontrol Thermostat
Capacitor
Auxiliary Relay
Connector
Terminal Plate

13
14

5

95

96

51C

52C

2Y

3

CM

GR480X7TAA

3.ELECTRICAL DATA

– 43 –

4

4-1 Trobleshooting

(1) Check before and after Troubleshooting

Many problems may happen because of wiring or power supply problems, so you should
check these areas first. Problems here can cause false results in some of the other tests,
and so should be corrected first.

11

11

1. Check power supply wiring

(a) Single-phase

❑ Check that power supply wires are correctly connected to terminal No.

1 through No. 4 on the 4P terminal plate in the indoor unit and L and N
on the 6P terminal in the outdoor unit.

(b) 3-phase

❑ Check that power supply wires are correctly connected to terminal No.

1 through No. 4 on the 4P terminal plate in the indoor unit and L1
through L3 and N on the 8P terminal in the outdoor unit.

22

22

2. Check inter-unit wiring

❑ Check that inter-unit control wiring (AC 220 - 240 V Line voltage) is

correctly connected between the indoor unit and outdoor unit.

33

33

3. Check power supply

❑ Check that voltage is within the specified range (±10% of the rating).
❑ Check that power is being supplied.

If the following troubleshooting must be done with power being supplied,
be careful not to thouch any uninsulated live part that can cause
ELECTRIC SHOCK.

44

44

4. Check the lead wires and connectors in indoor and outdoor units.

❑ Check that the sheath of lead wires is not damaged.
❑ Check that the lead wires are firmly connected at the terminal plate.
❑ Check that the wiring is correct.

55

55

5 Reference

• Condition of general cooling operation (Thermo. ON)

SWEEP..................ON

Indoor fan speed....HIGH

Single-phase outdoor unit

3-phase outdoor unit

1
2

4

1
2

4
L
N

Indoor Unit Outdoor Unit

Ground

Ground

B

A

0611_X_S

L

N

Power supply

Inter-Unit
Wiring
(Line voltage)

Fig. 16

1
2

4

1
2

4

L1

N

Indoor Unit Outdoor Unit

Power supply

Inter-Unit
Wiring
(Line voltage)

Ground

Ground

B

A

0612_X_S

L1

L2

L2

L3

L3

N

4.SERVICE PROCEDURES

– 44 –

4

(2) Air conditioner does not operate

11

11

1 Circuit breaker trips (or fuse blows).

(a) When the circuit breaker is set to ON, it is tripped soon.

• There is a possibility of ground fault.

• Check insulation resistance.
If resistance value is 1MΩ or less, it is a defect of insulation.

1

2

3

(Example)

*Set the circuit breaker to OFF.
Remove power supply cords

from the terminal plate in
the outdoor unit.

• Check insulation resistance
of power supply cords.

OK

NO

NO Insulation of

outdoor unit
is defective.

Execute
rewiring.

Remove interunit power line
from the terminal plate in
the outdoor unit.

• Check insulation resistance
of outdoor unit.

OK

Remove interunit power line
from the terminal plate in
the indoor unit.

• Check insulation resistance
of indoor unit.

OK

Interunit power lines are
defective.

NO

Insulation of
outdoor unit
is defective.

• Check insulation
resistance of
electrical parts
in the outdoor unit.

• Check insulation
resistance of
electrical parts
in the outdoor unit.

Execute
rewiring.

0613_X_S

+
+

+

+

+

+

1

3

2

Circuit
breaker

Outdoor
unit
5 1
6 2
3
4

Indoor
unit
1
2
3
4

Power
supply
cords

Interunit
power line

L
N

Earth

+
+

+

+
+

+

+
+

1

3

2

Circuit
breaker

Indoor
unit
1

2

Power
supply
cords

Interunit
power line

L1
L2
L3
N

Earth

4

+
+

+

+

4

Outdoor
unit
5 1
6
7 2
4
3

84

3

4.SERVICE PROCEDURES

– 45 –

4

(b)

Circuit breaker trips in several minutes after turning the air conditioner on.

• There is a possibility of short circuit.

22

22

2 Neither indoor unit nor outdoor unit runs.

A. Power is not supplied

0615_X_S

• Check power supply.
Is power being supplied
to outdoor unit ?

Circuit breaker
is tripped.

Power failure.

Reset the breaker.

Wait for recovery
or consult power
supply company.

NO

B. Check remote control unit.

0616_X_S

• Try to run both indoor and
outdoor units with another
remote control unit.

Refer to item C.

NO

The other remote control
unit is defective.

OK

• Check capacity of circuit
breaker.

NO

• Check resistance of
outdoor fan motor winding.

0614_X_S

Is capacity of circuit
breaker sufficient ?

• Check resistance of
compressor motor winding.

Replace it with a
suitable one.
(= larger capacity)

4.SERVICE PROCEDURES

– 46 –

4

C. Check “Operation selector” switch in the indoor unit.

: In case of wireless remote control unit

D. Check compressor motor protectors.
a) High pressure switch (63PH)

b)Compressor motor overcurrent relay (51C)

0618_X_S

• Check high pressure switch.
Does high pressure switch
actuate ? (63PH)

YES

YES

Clean heat exchanger coil
or remove obstacles.

• Is outdoor heat exchanger
coil dirty or are there
obstacles near air suction
inlet of outdoor unit ?

• Check if outdoor fan rotates.
Refer to “Only outdoor fan
does not run.”

NO

Disconnect the socket from 2P (WHT) connector.
Check the continuity between No.1 and No.2 poles
of the socket.

0617_X_S

• Has “Operation selector”
switch been set to ON
position ?

YES

Set “Operation selector”
switch to ON.

NO

But neither unit runs.

Switch Ass’y or P.C.B.
Ass’y in the indoor unit
is defective.

IND. LAMP Ass’y or P.C.B.
Ass’y in the indoor unit
is defective.

0619_X_S

• Check compressor motor
overcurrent relay. (51C)
Does it actuate ?

YES

NO

YES

Consult power supply company
and restore voltage to
normal value.

• Check power supply voltage.
Is voltage 90% or less of
rated voltage ?

• Following causes may be considered.
Locked rotor of compressor.
Overcharged refrigerant.
Air shortage of outdoor unit ventilation.
Obstacles in front of outdoor unit.

NO

Refer to “CHECKING ELECTRICAL COMPONENTS
(Electro magnetic contactor)”.

90% or more of
rated voltage.

4.SERVICE PROCEDURES

– 47 –

4

E. Check. auxiliary relay. (1Y or 2Y)

0620_X_S

• Check coil resistance of
auxiliary relay.
(1Y or 2Y)

F. Check indoor fan motor thermal protector (49FMI)

• Disconnect the socket from 9P (WHT) connector.

• Check the continuity
between No. 8 and No.9
poles of the 9P socket.

The thermal protector (49FMI)
is operated.

No continuity.

0621_X_S

• Check fan rotation.
Rotate the fan gently once
or twice by hand.

Check fan casing
for foreign matter
on the inside.

Remove foreign
matter or repair.

Repair or replace.

Fan cannot
be rotated.

OK

• Check fan motor capacitor.

Fan motor burnout
or foreign matter
in bearing.

G. Check fuse on the P.C.B. Ass’y in the indoor unit.

0622_X_S

• Check fuse on the P.C.B.
Ass'y in the indoor unit
for continuity.

• Check transformer. (TR)

• Check resistance of indoor
fan motor winding.
(FMI)

• Check resistance of louver
motor winding. (LM)

When the fuse blows.

OK

OK

OK

• Check resistance of drain
pump winding. (DP)

• Check coil of compressor
motor magnetic contactor.
(52C)

• P.C.B. Ass'y is defective.

OK

OK

OK

• Check resistance of dew
proof heater. (DPH)

4.SERVICE PROCEDURES

– 48 –

4

(3) Outdoor unit does not run.

A. Check COOL/FAN selector switch in the remote control unit.

0623_X_S

• Is COOL/FAN selector switch
set to COOL ?

NO

Set to COOL.

B. Check set temperature.

0624_X_S

Try to lower set
temperature by Temperature
setting button “COOLER”.

• Set “Operation selector”
switch to TEST in the
indoor unit.

YES

Outdoor unit runs.

Is room temperature too
low ?

NO

• Try to run both indoor and
outdoor units with another
remote control unit.

OK

The other remote control
unit is defective.
(Room sensor in the remote
control unit is defective.)

C. Outdoor unit is abnormal.
a) Check power supply wiring

0625_X_S

• Check negative phase relay.
(47C)
Dose it operate ?

Rewire power supply cords.

NO

4.SERVICE PROCEDURES

– 49 –

4

b) Check compressor motor thermal protector (49C)

0628_X_S

• Check voltage between
terminals No.2 and No.4 at
terminal plate.

• Check P.C.B. Ass’y.

No voltage appears.

P.C.B. Ass’y is defective.

D. Check indoor unit P.C.B.

E. Check float switch.

• Refer to “2-3 Drain Pump Control”

0629_X_S

Is drainage prevented from
flowing ?

• Check drain hose.

YES

• Check float switch (FS).

NO (Wait for 20 minutes.)

0626_X_S

Is temperature of compressor
abnormally high ?

Refrigerant gas shortage.

YES

NO

Compressor is defective.

Charge refrigerant gas.

• Check compressor motor
thermal protector. (49C)

0627_X_S

• Check compressor motor
magnetic contactor.
(52C)

(Only outdoor fan does not run.)

4.SERVICE PROCEDURES

– 50 –

4

(4) Indoor unit does not run.

(Indoor fan and louver motor do not run.

0630_X_S

P.C.B. Ass’y is defective.

(5) Some part does not operate.

(1) Indoor fan does not run.

• Check resistance of fan
motor winding.

• Check fan motor capacitor.

OK

Relay RY1 or RY2 on the
P.C.B. Ass’y is defective.

• Check fan rotation.
Rotate the fan gently once
or twice by hand.

0631_X_S

Check fan casing
for foreign matter
on the inside.

Remove foreign
matter or repair.

Repair or replace.

Fan cannot
be rotated.

Fan motor burnout
or foreign matter
in bearing.

OK

(2) Louver motor does not run.

• Check resistance of
louver motor winding.

P.C.B. Ass’y or remote
control unit is defective.

OK

0632_X_S

4.SERVICE PROCEDURES

– 51 –

4

(6) Outdoor fan does not run.

• Check resistance of fan
motor winding.

• Check fan motor capacitor

OK

• Check continuity between
terminals on the compressor
motor magnetic contactor.

• Check fan rotation.
Rotate the fan gently once
or twice by hand.

0633_X_S

• Check fan casing
for foreign matter
on the inside.

Remove foreign
matter or repair.

Repair or replace.

Fan cannot
be rotated.

• Fan motor burnout
or foreign matter
in bearing.

GR360X7TAA and GR480X7TAA

(8) Compressor does not run.

• Check compressor motor capacitor.

Refer to

4-4

0635_X_S

• Check resistance of compressor motor winding.

• Check compressor motor overload relay.
(Only SPW-C253G5, SPW-C253G5/M)

OK

OK

OK

NG

NG

NG

Refer to

4-4

Refer to

4-4

Refer to 4-4

NG

Replace magnetic
contactor.

• Check continuity between terminals R-U, and
then S-V on the magnetic contactor.

OK

(7) Outdoor fan speed is not switched from High to Low even when the outdoor

temperature falls below 25.5°C.

• Check the thermostat (23S).

• Check coil resistance of
the auxiliary relay.
(1Y)

0634_X_S

4.SERVICE PROCEDURES

– 52 –

4

(9) Poor cooling

Check installation position
of remote control unit.

• Does cool air from air condi­ tioner reach remote control
unit directly ?

• Is wide tube between indoor unit
and outdoor unit insulated ?

0636_X_S

• Measure temperatures of suction
and discharge air of indoor unit.

Change installation
position of remote
control unit.

Insulate wide tube and
then execute taping with
narrow tube.

YES

NO

Possibility of
refrigerant
shortage.

Charge
refrigerant
(R22).

Temperature
difference
is small.

YES

• Check clogging of air
filter.

Temperature difference between
suction and discharge air is
large enough (Approx. 10 deg. or more).

Clean filter.

Air filter is clogged.

Set fan speed to either
HIGH or MEDIUM.

• Is fan speed set to LOW ?

Reduce cooling load or
replace the unit with
higher cooling capacity.

• Review cooling load estimate,
if performance of air conditioner
is normal.

YES

4.SERVICE PROCEDURES

– 53 –

4

(10) Excessive cooling.

• The set temperature is too low.

• Is the remote control unit installed
at a place where it can
detect the room temperature
properly ?

0637_X_S

Set the temperature to
higher value using
temperature setting
button of the remote
control unit.

Change installation
position of the remote
control unit.

YES

NO

4.SERVICE PROCEDURES

– 54 –

4

4-2 A Sensor is Defective.

11

11

1 Indoor (heat exchanger) coil temp. Sensor is defective.

(a) Open (=No continuity in sensor)

Compressor and outdoor fan repeat ON for 10 minutes and OFF for 6 minutes
when sensor opens.

(b) Short

“Freeze Prevention” does not operate when dehumidified water is frozen on the
indoor coil.

22

22

2 Room temp. Sensor (in the remote control unit) is defective.

(a) Open (=No continuity in sensor)

Neither outdoor fan nor compressor runs.

(b) Short

Outdoor fan and compressor do not stop. — Excessive cooling.

4-3 Operation of Major Electrical Parts

(Function)

Operation

Indoor unit and Remote Control unit

Oudoor unit

Freeze prevention

Manual

Energy
saver

Night
setback

Timer
(set)

Fan

Operation Mode

Sweep

Stop

Indicator lamps

Thermo. ON VV V V V
Thermo. OFF VV V
Thermo. ON VV V VV V
Thermo. OFF VV V

Thermo. ON VV V VV V
Thermo. OFF VV V
ON Timer V
OFF Timer VVV VV V

VV V

VV

Cool VV* V* VV* V*
Fan VV
Cool VV* V* VV* V*
Fan VV

NOTE V* Refer to Cooling Mode.

Cool

Timer

Sweep

Cool

-ing

Fan

Flap

Night setback
Energy saver

Room
Temp.

Fan Compressor

4.SERVICE PROCEDURES

– 55 –

4

4-4 Checking the Electrical Components

(1) Measurement of Insulation

Resistance

• The electrical insulation is acceptable when the
resistance exceeds 1 MΩ.

1 Power Supply Wires

Clamp the earthed wire of the Power Supply wires
with a lead clip of the insulation resistance tester and
measure the resistance by placing a probe on either
of the power wires. (Fig. 42)

Then measure the resistance between the earthed
wire and the other power wires. (Fig. 42)

2 Indoor Unit

Clamp an aluminum plate fin or copper tube with the
lead clip of the insulation resistance tester and
measure the resistance by placing a probe on the
terminal plate (Fig. 43)

3 Outdoor Unit

Measure the resistance by placing a probe on the
terminal plate in the same manner as explained
above 2. (Fig. 43)

4 Measurement of Insulation Resistance for

Electrical parts

• Disconnect the connector of the desired electric
part from terminal plate, P.C.B. Ass’y, etc. (Fig. 44)

• Similarly, disconnect the lead wires from
compressor, capacitor, etc. (Fig. 45)

• Measure the resistance in the same manner as
illustrated on the right.

Refer to Electrical Wiring Diagram.

NOTE

If the probe does not enter the hole because the
hole is too narrow, use a probe with a thinner pin.

Fig. 42

Fig. 43

Fig. 44

Fig. 45

Copper
tube or
metallic part

Clip

Insulation
tester

Probe

Terminal plate

0639_X_S

Copper
tube or
metallic part

Clip

Insulation
tester

Probe

0640_X_S

From fan motor,
compressor and other
parts.

Clip

Probe

Insulation
tester

Metallic
part

0641_X_S

Earthed wire

Clip

Probe

Insulation
tester

0638_X_S

4.SERVICE PROCEDURES

– 56 –

4

(2) Checking the Protective Devices

• Disconnect the connector, which consists of P (plug) and S (socket) when you want to
check the protective device.

• Then check continuity among plug’s (and/or socket’s) terminal as in Fig. 46.

• Normality of the protective device can be judged by the following table.
The Protective Device is proved normal if there is a continuity between terminals.

1 Indoor fan motor thermal protector (49FI) . . . . . . Indoor unit

• Disconnect the connector which leads to the indoor fan motor (FMI).

• Check the socket’s terminals.

2 Compressor motor thermal protector (49C) . . . . . . Outdoor unit

• Disconnect both the connectors in the outdoor unit.

• Check terminal between the plug and socket.

3 Outdoor fan motor thermal protector (49FO) . . . . . . Outdoor unit

• Disconnect both the connector which leads to the outdoor fan motor (FMO).

• Check socket’s terminal.

Fig. 46

Ω

socket

Multimeter

0642_X_S

4.SERVICE PROCEDURES

– 57 –

4

Fig. 47

Multimeter

Fan motor
Capacitor

0643_X_S

(3) Checking the Electrical Parts

1 Power transformer (TR1) ................. Indoor unit *Measure the coil resistance.

• Primary 220-240 V; Measure the resistance between two WHT lead wire
terminals of socket connected to power transformer.

• Secondary 10.6V ; Measure the resistance between two BRN lead wires.

Refer to “1–3–(A) Other component specifications”.

2 Indoor fan motor (FMI) ............... Indoor unit *Measure the coil resistance.

• Measure the resistance between each terminal of the socket connected to

the indoor fan motor.

Refer to “1–2–(A) Major component specifications”.

3 Outdoor fan motor (FMO) ........... Outdoor unit *Measure the coil resistance.

• Measure the resistance in the same manner as explained above 2.

Refer to “1–2–(B) Major component specifications”.

4 Fan motor capacitor ............ Both in indoor and outdoor unit

• Remove the lead wires from the capacitor terminals,

and then place a probe on the capacitor terminals as
shown in Fig. 47. Observe the deflection of the pointer,
setting the resistance measuring range of the multimeter
to the maximum value.

• The capacitor is “acceptable” if the pointer bounces to a

great extent and then gradually returns to its original
position.

NOTE

The range of deflection and the deflection time differ according to
the capacity of the capacitor.

4.SERVICE PROCEDURES

– 58 –

4

5 Fuse on indoor P.C.B. Ass’y

• Remove the P.C.B. Ass’y from the electrical component box. Then pull out the
fuse from the P.C.B. Ass’y. (Fig. 48)

• The check for continuity of the fuse by using the multimeter. (Fig. 49)
Having continuity is acceptable.

(4) Thermistor Characteristic Curve

1 Room temp. sensor 1 Coil sensor

Fuses

Indoor P.C.B. Ass’y

0644_X_S

Fuse

0645_X_S

(PBC-41E)(KTEC-35)

Resistance (kn )

10 15 20 25 30 35 40

10

9
8
7
6
5
4
3
2
1

Temperature (°C)

0374_M_I

–20 –15 –10 –5 0 5 10 15 20

0

5

10

15

20

25

30

35

40

Temperature (°C)

Resistance (kn )

0375_M_I

Fig. 48

Fig. 49

4.SERVICE PROCEDURES