Sanyo C2462R, CL2462R User Manual

TECHNICAL DATA

&

SERVICE MANUAL

KS2462R / C2462R, CL2462R

SPLIT SYSTEM AIR CONDITIONER

INDOOR MODEL No. PRODUCT CODE No. OUTDOOR MODEL No. PRODUCT CODE No.

KS2462R 854 019 00

Indoor Unit Outdoor Unit

C2462R 854 019 01

CL2462R 854 019 02

FILE NO.

854648419200

KS2462R C2462R

CL2462R

REFERENCE NO. SM830092

– 1 –

SM830092

Important

Please Read Before Starting

This air conditioning system meets strict safety and operating
standards. As the installer or service person, it is an important
part of your job to install or service the system so it operates
safely and efficiently.

For safe installation and trouble-free operation, you must :

Carefully read this instruction booklet before beginning.
Follow each installation or repair step exactly as shown.
Observe all local, state, and national electrical codes.
Pay close attention to all warning and caution notices

given in this manual.

This symbol refers to a hazard or
unsafe practice which can result in
severe personal injury or death.

This symbol refers to a hazard or

CAUTION

unsafe practice which can result in
personal injury or product or
property damage.

If Necessary, Get Help

These instructions are all you need for most installation sites
and maintenance conditions. If you require help for a special
problem, contact our sales/service outlet or your certified dealer
for additional instructions.

In Case of Improper Installation

The manufacturer shall in no way be responsible for improper
installation or maintenance service, including failure to follow
the instructions in this document.

SPECIAL PRECAUTIONS

When Wiring

……………………………………………………………………

ELECTRICAL SHOCK CAN CAUSE SEVERE
PERSONAL INJURY OR DEATH. ONLY A
QUALIFIED, EXPERIENCED ELECTRICIAN
SHOULD ATTEMPT TO WIRE THIS SYSTEM.

• Do not supply power to the unit until all wiring and tubing are
completed or reconnected and checked.

• Highly dangerous electrical voltages are used in this system.
Carefully refer to the wiring diagram and these instructions
when wiring. Improper connections and inadequate ground­ing can cause accidental injury or death.

• Ground the unit following local electrical codes.

• Connect all wiring tightly. Loose wiring may cause overheat­ing at connection points and a possible fire hazard.

When Transporting

……………………………………………………………………
Be careful when picking up and moving the indoor and outdoor

units. Get a partner to help, and bend your knees when lifting to
reduce strain on your back. Sharp edges or thin aluminum fins
on the air conditioner can cut your fingers.

When Installing

……………………………………………………………………

…In a Room

Properly insulate any tubing run inside a room to prevent
“sweating” that can cause dripping and water damage to walls
and floors.

…In Moist or Uneven Locations

Use a raised concrete pad or concrete blocks to provide a
solid, level foundation for the outdoor unit. This prevents water
damage and abnormal vibration.

…In an area with High Winds

Securely anchor the outdoor unit down with bolts and a metal
frame. Provide a suitable air baffle.

…In a Snowy Area (for Heat Pump-type Sys-tems)

Install the outdoor unit on a raised platform that is higher than
drifting snow. Provide snow vents.

When Connecting Refrigerant Tubing

……………………………………………………………………

• Ventilate the room well, in the event that refrigerant gas
leaks during the installation. Be careful not to allow contact
of the refrigerant gas with a flame as this will cause the
generation of poisonous gas.

• Keep all tubing runs as short as possible.

• Use the flare method for connecting tubing.

• Apply refrigerant lubricant to the matching surfaces of the
flare and union tubes before connecting them, then tighten
the nut with a torque wrench for a leak-free connection.

• Check carefully for leaks before starting the test run.

NOTE

Depending on the system type, liquid and gas lines may be
either narrow or wide. Therefore, to avoid confusion the
refrigerant tubing for your particular model is specified as either
“narrow” or “wide” rather than as “liquid” or “gas”.

When Servicing

……………………………………………………………………

• Turn the power OFF at the main power box (mains) before
opening the unit to check or repair electrical parts and
wiring.

• Keep your fingers and clothing away from any moving parts.

• Clean up the site when installation is finished. Check that no
metal scraps or bits of wiring have been left inside the unit.

CAUTION

• Ventilate any enclosed areas when installing or testing the
refrigeration system. Contact of refrigerant gas with fire or
heat can produce poisonous gas.

• Confirm after installation that no refrigerant gas is leaking. If
the gas comes in contact with a burning stove, gas water
heater, electric room heater or other heat source, it can
cause the generation of poisonous gas.

– 2 –

SM830092

Table of Contents

1. OPERATING RANGE ....................................................................................... 4

2. SPECIFICATIONS............................................................................................ 5

(1) Unit Specifications ...................................................................................... 5

(2) Major Component Specifications ................................................................ 7

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

(B) Outdoor Unit.......................................................................................... 8

(3) Other Component Specifications .............................................................. 10

(A) Indoor Unit .......................................................................................... 10

(B) Outdoor Unit........................................................................................ 12

3. DIMENSIONAL DATA..................................................................................... 13

(1) Indoor Unit ................................................................................................ 13

(2) Outdoor Unit.............................................................................................. 14

4. COOLING CAPACITY..................................................................................... 15

5. PERFORMANCE CHARTS ............................................................................ 17

(1) Operating Current ..................................................................................... 17

(2) High and Low Pressure............................................................................. 19

6. AIR THROW DISTANCE CHART................................................................... 21

7. REFRIGERANT FLOW DIAGRAM ................................................................. 22

8. INSTALLATION INSTRUCTIONS .................................................................. 23

9. ELECTRICAL DATA ....................................................................................... 29

10. ELECTRICAL WIRING DIAGRAMS ............................................................... 30

(1) Indoor Unit ................................................................................................ 30

(2) Outdoor Unit.............................................................................................. 31

11. PROCESSES AND FUNCTIONS.................................................................. 35

(1) Room Temperature Control ...................................................................... 35

(2) Dry Operation............................................................................................ 36

(3) Freeze Prevention..................................................................................... 37

(4) Outdoor Fan Speed Control......................................................................38

12. SERVICE PROCEDURES.............................................................................. 39

(1) Troubleshooting ........................................................................................ 39

(2) A Sensor is Defective................................................................................ 50

(3) Checking the Electrical Components ........................................................ 51

– 3 –

SM830092

1. OPERATING RANGE

KS2462R / C2462R

Temperature Indoor Air Intake Temp. Outdoor Air Intake Temp.

Maximum 95 °F DB / 71 °F WB 115 °F DB

Minimum 67 °F DB / 57 °F WB 67 °F DB

KS2462R / CL2462R

Temperature Indoor Air Intake Temp. Outdoor Air Intake Temp.

Maximum 95 °F DB / 71 °F WB 115 °F DB

Minimum 67 °F DB / 57 °F WB 0 °F DB

– 4 –

SM830092

2. SPECIFICATIONS

1-1 Unit Specifications

MODEL No. Indoor Unit

Outdoor Unit C2462R

POWER SOURCE 230 - 208 V / 1 Phase / 60 Hz
PERFORMANCE Cooling

Capacity

Air circulation (Hi)
Moisture removal (High) Pints / h 6.5

ELECTRICAL RATINGS

Voltage rating VAC
Available voltage range 187 – 253
Running amperes* A 10.2
Max. running amperes** A 12.5
Power input W 2,240
Power factor % 95.5
S.E.E.R 13.0
Max. starting amperes A 61

FEATURES

Controls Microprocessor
Timer ON/OFF 24-hours & Program
Fan speed Indoor / Outdoor 3 and Automatic control / 2 (Auto)
Air deflection Horizontal / Vertical – / Automatic
Air filter Washable, easy access
Remote controller (Accessory) RCS - 1PS4U - G
Refrigerant control Capillary tube
Refrigerant tubing connections Flare type
Compressor Scroll
Operation sound

REFRIGERANT TUBING

Limit of tubing length ft. (m)
Limit of tubing length at shipment 23 ( 7 )
Limit of elevation difference
between the two units
Refrigerant tube Narrow tube 3 / 8 (9.52)
outer diameter Wide tube 3 / 4 (19.05)
Refrigerant amount at shipment lbs. (kg) R410A - 6.6 (3)

DIMENSIONS & WEIGHT Indoor unit Outdoor unit

Unit dimensions Height in. (mm)

Package dimensions Height

Net weight lbs. (kg)
Shipping weight
Shipping volume

Cooling:

Rating conditions (*) : Indoor air temperature 80 °F DB / 67 °F WB, Outdoor air temperature 95 °F DB / 75°F WB
Full load conditions (**):Indoor air temperature 80 °F DB / 67 °F WB, Outdoor air temperature 115°F DB

Indoor - Hi/Me/Lo
Outdoor - Hi

Width
Depth

Width
Depth 15-31/32 (406)

BTU / h

kW

Cu.ft. / min.

VAC

BTU / Wh

dB - A 48 / 42 / 38
dB - A 55

ft. (m)
ft. (m)

in. (mm)
in. (mm)

in. (mm)
in. (mm)
in. (mm)
in. (mm)
in. (mm)

lbs. (kg)

cu. ft.(m )

3

27,000

7.912
559

230

13 (330)
44-7/8 (1,140)
8-31/32 (228)
12-25/32 (325)
48-15/32 (406)

40 (18)
44 (20)

5.7 (0.162)

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

KS2462R

26,000

7.619
519

6.4

208

10.9

13.5

2,200

97.0

13.0
61

132 ( 40 )

50 ( 15 )

36-5/8 (930)
37 (940)
13-3/8 (340)
39-3/4 (1,010)
39-3/8 (1,000)
15-3/4 (400)
150 (68)
190 (86.5)

14.1 (0.40)

– 5 –

SM830092

2. SPECIFICATIONS

1-1 Unit Specifications

MODEL No. Indoor Unit

Outdoor Unit CL2462R

POWER SOURCE 230 - 208 V / 1 Phase / 60 Hz
PERFORMANCE Cooling

Capacity

Air circulation (Hi)
Moisture removal (High) Pints / h 6.5

ELECTRICAL RATINGS

Voltage rating VAC
Available voltage range 187 – 253
Running amperes* A 10.2
Max. running amperes** A 12.5
Power input W 2,240
Power factor % 95.5
S.E.E.R 13.0
Max. starting amperes A 61

FEATURES

Controls Microprocessor
Timer 1-hour OFF, ON/OFF 12-hours & Program
Fan speed Indoor / Outdoor 3 and Automatic control / 3 (Auto)
Air deflection Horizontal / Vertical – / Automatic
Air filter Washable, easy access
Remote controller (Accessory) RCS - 1PS4U - G
Refrigerant control Capillary tube
Refrigerant tubing connections Flare type
Compressor Scroll
Operation sound

REFRIGERANT TUBING

Limit of tubing length ft. (m)
Limit of tubing length at shipment 23 ( 7 )
Limit of elevation difference
between the two units
Refrigerant tube Narrow tube 3 / 8 (9.52)
outer diameter Wide tube 3 / 4 (19.05)
Refrigerant amount at shipment lbs. (kg) R410A - 6.6 (3)

DIMENSIONS & WEIGHT Indoor unit Outdoor unit

Unit dimensions Height in. (mm)

Package dimensions Height

Net weight lbs. (kg)
Shipping weight
Shipping volume

Cooling:

Rating conditions (*) : Indoor air temperature 80 °F DB / 67 °F WB, Outdoor air temperature 95 °F DB / 75°F WB
Full load conditions (**):Indoor air temperature 80 °F DB / 67 °F WB, Outdoor air temperature 115°F DB

Indoor - Hi/Me/Lo
Outdoor - Hi

Width
Depth

Width
Depth

BTU / h

kW

Cu.ft. / min.

VAC

BTU / Wh

dB - A 48 / 42 / 38
dB - A 55

ft. (m)
ft. (m)

in. (mm)
in. (mm)

in. (mm)
in. (mm)
in. (mm)
in. (mm)
in. (mm)

lbs. (kg)

cu. ft.(m )

3

27,000

7.912
559

230

13 (330)
44-7/8 (1,140)
8-31/32 (228)
12-25/32 (325)
48-15/32 (406)
15-31/32 (406)
40 (18)
44 (20)

5.7 (0.162)

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

KS2462R

26,000

7.619
519

6.4

208

10.9

13.5

2,200

97.0

13.0
61

132 ( 40 )

50 ( 15 )

36-5/8 (930)
37 (940)
13-3/8 (340)
39-3/4 (1,010)
39-3/8 (1,000)
15-3/4 (400)
150 (68)
190 (86.5)

14.1 (0.40)

– 6 –

SM830092

2. SPECIFICATIONS

(2) Major Component Specifications

(A) Indoor Unit

MODEL No. KS2462R
Source 230 - 208 V / 1 phase / 60 Hz
Remote controller (Accessory) RCS - 1PS4U - G
Controller P. C. B Ass'y CR - KS2462R

Control circuit fuse 250 V, 3 A

Fan
Type Cross-flow
Number ... Dia. and length in. (mm) 1 ... O.D. 4 (100), L33-3/8 (847)
Fan motor

Model KFG4X - 31B6P-S
Source 230 - 208 V / 1 phase / 60 Hz
No. of pole … r.p.m. (230 V, High) rpm 4 … 1,365
Nominal output W 30
Coil resistance Ω BRW - WHT : 161.2 , ORG - YEL : 26.9
(Ambient temperature 68 °F) WHT - VLT : 11.6 , YEL - BLK : 22.8

VLT - ORG : 68.7 , BLK - PNK : 115.2

Safety device Internal

Operating temperature Open °F 266 ± 9

Close °F 181 ± 27

Run capacitor VAC, µF 440 V , 1.5 µF

Heat exchanger

Coil Aluminum plate fin / Copper tube
Rows … Fins per inch 2 … 19.5
Face area ft.

Flap Motor

Type Stepping motor
Model ... Q’ty MP24GA2 ... 2
Step angle 5.625 deg / step
Rating V DC 12 V
Coil resistance (Ambient temperature 77 °F) Ω 400 ± 7 %

2

(m2) 2.30 (0.214)

DATA SUBJECT TO CHANGE WITHOUT NOTICE

– 7 –

SM830092

2. SPECIFICATIONS

(2) Major Component Specifications

(B) Outdoor Unit

MODEL No. C2462R
Source 230 - 208 V / 1 phase / 60 Hz
Compressor Scroll (Hermetic)

Model ZP23K3E
Source 230 - 208 V / 1 phase / 60 Hz
Nominal output W 2,400
Compressor oil cc 1,120
Coil resistance (Ambient temperature 77 °F) Ω C - R : 2.28 , C - S : 1.01
Safety device Internal type

Overload relay models —
Operating temperature Open °F 284 ± 9

Close °F

Operating ampere (at 77 °F) A —

Run capacitor VAC, µF 400 V, 40 µF

Refrigerant amount charged at shipment lbs. (kg) R410A : 6.6 (3)
High pressure switch ACB - 1UB24W

Set pressure OFF MPa 4.15

ON MPa 3.15 ± 0.3

Fan Propeller

Number...diameter in. (mm) 1 … 18-3/32 (460)

Fan speeds 2 (AUTO)
Fan motor

Model KFC6T - 91D6P
Source 230 - 208 V / 1 phase / 60 Hz
No. of pole … rpm (230 V, High) rpm 6 … 879
Nominal output W 110
Coil resistance Ω BRW – WHT : 67.14 , VLT – YEL : 11.42

(Ambient temperature 68 °F)
Safety device

Operating temperature Open °F 248 ± 9

Close °F 171 ± 27

Run capacitor VAC, µF 440 V, 4 µF

Heat exchanger

Coil Aluminum plate fin / Copper tube
Rows … Fins per inch 2 … 14.1
Face area ft.

2

(m2) 8.72 (0.81)

WHT – VLT : 64.85 , YEL – PNK : 10.60

DATA SUBJECT TO CHANGE WITHOUT NOTICE

156 189

+ 0
– 0.15

Internal

– 8 –

SM830092

2. SPECIFICATIONS

(2) Major Component Specifications

(B) Outdoor Unit

MODEL No. CL2462R
Source 230 - 208 V / 1 phase / 60 Hz
Controller P.C.B. Ass'y CR - CL2432 (Microprocessor)

Control circuit fuse 250 V, 3 A

Compressor Scroll (Hermetic)

Model ZP23K3E
Source 230 - 208 V / 1 phase / 60 Hz
Nominal output W 2,400
Compressor oil cc 1,120
Coil resistance (Ambient temperature 77 °F) Ω C – R : 0.885 , C – S : 1.773

Safety device Internal type

Overload relay models —
Operating temperature Open °F 284 ± 9

Close °F 156 189

Operating ampere (at 77 °F) A —
Run capacitor VAC, µF 400 V, 40 µF
Crank case heater V, W 230 V, 30 W

Refrigerant amount charged at shipment lbs. (kg) R410A : 6.6 (3)
High pressure switch ACB-1UB24W

Set pressure OFF MPa 4.15

ON MPa 3.15 ± 0.3

Fan Propeller

Number...diameter in. (mm) 1 ... 18 - 3/32 (460)

Fan speeds 3 (AUTO)
Fan motor

Model KFC6T - 91D6P
Source 230 - 208 V / 1 phase / 60 Hz

No. of pole ..... rpm (230 V, High) 6 ... 879

Nominal output W 110
Coil resistance Ω BRN – WHT : 67.14 , VLT – YEL : 11.42

(Ambient temperature 68 °F) WHT – VLT : 64.85 , YEL – PNK : 10.60
Safety device Internal

Operating temperature Open °F 248 ± 9

Close °F 171 ± 27

Run capacitor VAC, µF 440 V, 4 µF

Heat exchange

Coil Aluminum plate fin / Copper tube

Rows ..... Fins per inch 2 ... 14.1

2

Face area ft.

(m2) 8.72 (0.81)

DATA SUBJECT TO CHANGE WITHOUT NOTICE

+ 0
– 0.15

– 9 –

SM830092

2. SPECIFICATIONS

(3) Other Component Specifications

(A) Indoor Unit

MODEL No. KS2462R
Power Transformer ATR – T5

Rated Primary AC 230 V, 60 Hz

Secondary AC19 V, 0.5 A
Capacity 9.5 VA

Coil resistance
(Ambient temprature 77 °F) Secondary (BRN - BRN) : 3.9

Thermistor cut off temperature 277 °F

Thermistor (Coil sensor) DTN - TKS131B

Coil resistance kΩ 32 °F : 15.0 ± 2 %

Thermistor (Room sensor) DTN - TKS128B

Coil resistance kΩ 77 °F : 5.0 ± 3 %

Lamp Ass'y IND - K301AH
Flap Motor MP24GA2

Ω

Primary (WHT - WHT) : 457.5

– 10 –

SM830092

2. SPECIFICATIONS

(3) Other Component Specifications

(A) Outdoor Unit

MODEL No. C2462R

Compressor Motor Magnetic Contactor FC - 1SUL

Coil rated AC 240 V, 60 Hz
Coil resistance (at 68 °F) Ω 587 ± 5 %
Contact rated (Main) AC 240 V, 26 A
Contact rated (Auxiliary) AC 240 V, 3 A

Power Relay HH62S

Coil rated AC 240 V, 60 Hz
Coil resistance (at 68 °F) kΩ 17.2
Contact rated AC 220 V, 5 A

Thermostat (Coil sensor) YTB - 4U305F

Operating Temperature °F 79 ± 3 OFF

75 ON

Contact rated 200 to 240 V, 1 A

+ 3
– 1

– 11 –

SM830092

2. SPECIFICATIONS

(3) Other Component Specifications

(B) Outdoor Unit

MODEL No. CL2462R
Compressor Motor Magnetic Contactor FC - 1SUL

Coil rated AC 240 V, 60 Hz
Coil resistance (at 77 °F) Ω 587 ± 5 %
Contact rated (Main) AC 240 V, 26 A
Contact rated (Auxiliary) AC 240 V, 3 A

Power Relay HH62S

Coil rated AC 240 V, 60 Hz
Coil resistance (at 77 °F) kΩ 17.2
Contact rated AC 220 V, 5 A

Power Transformer ATR - I35B

Rated

Primary AC 220 V, 60 Hz

Secondary 14 V, 0.2 A
Capacity 2.8 VAC
Coil resistance (at 78 °F ) Ω WHT – WHT : 482.5 , BRN – BRN : 3.95
Thermal cut off temperature °F 266

Thermistor (Outdoor Temp. sensor)

Coil resistance kΩ 14 °F : 23.7 , 50 °F : 9.7

23 °F : 18.8 , 68 °F : 6.5
32 °F : 15.0 , 86 °F : 4.4
41 °F : 12.1 , 104 °F : 3.1

Solenoid control valve or coil

Solenoid control valve VPV - 202DQ50
Solenoid coil VPV - MOAQ517B1

PBC - 41E - S4

113 °F : 2.6

– 12 –

SM830092

3. DIMENSIONAL DATA

(1) Indoor Unit: KS2462R

44-7/8

13

1-7/8

6-27/32

Center of tubing
hole (2 places)

Narrow tube 3/8"(ø9.52)

Drain hose O.D. 23/32"(ø18)

5-5/16

Wide tube 3/4"(ø19.05)

8-31/32

Remote control unit

6-7/32

1-7/8

2-13/32

Dimension : inch

25/32

2199_M_S

– 13 –

SM830092

3. DIMENSIONAL DATA

(2) Outdoor Unit: C2462R, CL2462R

13-3/8

36-5/8

6-23/32

1/2

25-31/32

37

1/21/2

1/2

4-3/8

25/323/4

15-15/16

14-31/32

18-1/16

16-7/8

5

4

Dimension : inch

Hole for anchor bolt (4-R1/4)
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

5

4

– 14 –

SM830092

4. COOLING CAPACITY

Indoor Unit: KS2462R Outdoor Unit: C2462R

1

• 230V / 1 phase / 60Hz

RATING CAPACITY : 27,000 BTU / h AIR FLOW RATE : 559 Cu.ft / min
EVAPORATOR CONDENSER

ENT. TEMP. °F (°C) AMBIENT TEMP. °F (°C)

WB DB 75 85 95 105 115

TC

CI 1.66

72(22.2) SHC 18,460

59

(15.0)

63

(17.2)

67

(19.4)

71

(21.7)

75

(23.9)

76(24.4) SHC 20,150
80(26.7) SHC 21,930
84(28.9) SHC 23,620
88(31.1)

72(22.2)
76(24.4)
80(26.7)
84(28.9)
88(31.1)

72(22.2)
76(24.4)
80(26.7)
84(28.9)
88(31.1)

72(22.2)
76(24.4)
80(26.7)
84(28.9)
88(31.1)

76(24.4)
80(26.7)
84(28.9)
88(31.1)

SHC 25,320

TC

CI
SHC
SHC
SHC
SHC
SHC

TC

CI
SHC
SHC
SHC
SHC
SHC

TC

CI
SHC
SHC
SHC
SHC
SHC

TC

CI
SHC
SHC
SHC
SHC

(23.9) (29.4) (35.0) (40.6) (46.1)

27,350

28,380

1.67
16,130
17,820

19,590
21,290
22,990
29,460

1.69
13,770
15,470

17,240
18,940
20,630
31,020

1.7
11,500
13,190

14,960
16,660
18,360
31,640

1.74
10,560
12,330

14,020

15,720

26,030

1.81
17,640
19,340
21,110
22,810
24,500
27,110

1.83
15,400
17,100
18,870
20,570
22,260
28,300

1.85
13,170
14,870
16,640
18,330
20,030
29,940

1.87
10,990
12,680
14,450
16,150
17,850
30,620

1.9
10,120
11,900
13,590
15,290

24,520

1.97
16,740
18,430
20,210
21,900
23,600
25,760

2
14,660
16,360
18,130
19,820
21,520

# 27,000

2.02
12,510
14,210
15,980
17,680
19,370
28,780

2.05
10,450
12,140
13,920
15,610
17,310
29,540

2.08

9,680
11,450
13,150
14,840

22,820

2.23
15,760
17,450

19,220
20,920
22,620
24,220

2.26
13,840
15,530

17,310
19,000
20,700
25,570

2.29
11,810
13,510

15,280
16,970
18,670
27,510

2.32

9,870

11,570

13,340
15,040
16,730
28,300

2.35

9,170
10,950
12,640
14,340

20,930

2.49
14,710
16,400
18,170
19,870
20,930
22,550

2.52
12,970
14,670
16,440
18,140
19,830
24,000

2.55
11,060
12,760
14,530
16,230
17,920
26,110

2.59

9,260
10,950
12,730
14,420
16,120
26,970

2.63

8,650
10,420
12,110
13,810

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

Rating conditions are

: Outdoor Ambient Temp. 95 °F DB
: Indoor Unit Entering Air Temp. 80 °F DB / 67 °F WB

SM830092

– 15 –

4. COOLING CAPACITY

Indoor Unit: KS2462R Outdoor Unit: C2462R

1

• 208V / 1 phase / 60Hz

RATING CAPACITY : 26,000 BTU / h AIR FLOW RATE : 519 Cu.ft / min
EVAPORATOR CONDENSER

ENT. TEMP. °F (°C) AMBIENT TEMP. °F (°C)

WB DB 75 85 95 105 115

TC

CI 1.64

72(22.2) SHC 17,760

59

(15.0)

63

(17.2)

67

(19.4)

71

(21.7)

75

(23.9)

76(24.4) SHC 19,360
80(26.7) SHC 21,030
84(28.9) SHC 22,630
88(31.1)

72(22.2)
76(24.4)
80(26.7)
84(28.9)
88(31.1)

72(22.2)
76(24.4)
80(26.7)
84(28.9)
88(31.1)

72(22.2)
76(24.4)
80(26.7)
84(28.9)
88(31.1)

76(24.4)
80(26.7)
84(28.9)
88(31.1)

SHC 24,230

TC

CI
SHC
SHC
SHC
SHC
SHC

TC

CI
SHC
SHC
SHC
SHC
SHC

TC

CI
SHC
SHC
SHC
SHC
SHC

TC

CI
SHC
SHC
SHC
SHC

(23.9) (29.4) (35.0) (40.6) (46.1)

26,340

27,330

1.66
15,540
17,140
18,810
20,410
22,010
28,370

1.67
13,310
14,910
16,580
18,180
19,770
29,870

1.69
11,150
12,750
14,420
16,020
17,620
30,470

1.72
10,240
11,910
13,510
15,110

25,060

1.79
16,960
18,560
20,230
21,830
23,430
26,100

1.82
14,840
16,430
18,110
19,700
21,300
27,250

1.83
12,720
14,320
15,990
17,590
19,190
28,830

1.85
10,650
12,250
13,920
15,520
17,120
29,480

1.88

9,810
11,480
13,080
14,680

23,610

1.95
16,080
17,680
19,350
20,950
22,550
24,800

1.98
14,110
15,710
17,380
18,980
20,580

# 26,000

2
12,080
13,680
15,350
16,950
18,550
27,720

2.03
10,130
11,730
13,400
15,000
16,600
28,440

2.06

9,380
11,050
12,650
14,250

21,970

2.23
15,120
16,720
18,390
19,990
21,590
23,320

2.27
13,310
14,910
16,580
18,180
19,780
24,620

2.29
11,390
12,990
14,660
16,260
17,860
26,490

2.32

9,570
11,170
12,840
14,440
16,040
27,250

2.36

8,890
10,560
12,160
13,760

20,150

2.52
14,100
15,700
17,370
18,970
20,150
21,710

2.55
12,470
14,070
15,740
17,340
18,940
23,110

2.58
10,670
12,260
13,940
15,540
17,130
25,140

2.62

8,970
10,570
12,240
13,840
15,440
25,970

2.66

8,380
10,050
11,650
13,250

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

Rating conditions are

: Outdoor Ambient Temp. 95 °F DB
: Indoor Unit Entering Air Temp. 80 °F DB / 67 °F WB

SM830092

– 16 –

5. PERFORMANCE CHARTS

(1) Operating Current

Indoor Unit: KS2462R Outdoor Unit: C2462R

1

Operating current characteristics versus outdoor ambient temperature and indoor temperature.
(Indoor relative humidity: 50%, Indoor fan speed: High)

230V

208V

Outdoor fan speed

Low

14
13
12
11
10

9
8

Operating current (A)

7

59 68 77 86 95 104

(15) (20) (25) (30) (35) (40)

Outdoor ambient temp. °F (°C)

Outdoor fan speed

Low

14
13
12
11
10

9
8

Operating current (A)

7

High

High

Indoor
temp.
°F (°C)

85 (30)
80 (27)
75 (24)
70 (21)

1061_X_S

Indoor
temp.
°F (°C)

85 (30)
80 (27)
75 (24)
70 (21)

59 68 77 86 95 104

(15) (20) (25) (30) (35) (40)

Outdoor ambient temp. °F (°C)

– 17 –

1062_X_S

SM830092

5. PERFORMANCE CHARTS

(1) Operating Current

Indoor Unit: KS2462R Outdoor Unit: CL2462R

2

Operating current characteristics versus outdoor ambient temperature and indoor temperature.
(Indoor relative humidity: 50%, Indoor fan speed: High)

230V

Operating current (A)

208V

Operating current (A)

Outdoor fan speed

Low High

14
13
12
11
10

9
8

7

23 32 41 50

(–5) (0) (5) (10) (35) (40)

14
13
12
11
10

9
8
7

59 68 77 86 95 104

(15) (20) (25) (30)

Outdoor ambient temp. °F (°C)

Outdoor fan speed

Low High

Med

Med

Indoor
temp.
°F (°C)

85 (30)
80 (27)
75 (24)
70 (21)

1063_X_S

Indoor
temp.
°F (°C)

85 (30)
80 (27)
75 (24)
70 (21)

23 32 41 50

(–5) (0) (5) (10) (35) (40)

59 68 77 86 95 104

(15) (20) (25) (30)

Outdoor ambient temp. °F (°C)

– 18 –

1064_X_S

SM830092

5. PERFORMANCE CHARTS

(2) High and Low Pressure

Indoor Unit: KS2462R Outdoor Unit: C2462R

1

• High Pressure

High pressure characteristics versus outdoor ambient temperature and indoor temperature.
(Indoor relative humidity: 50%, Indoor fan speed: High)

230V / 208 V

480
460
440
420
400
380
360
340

Discharge pressure (psig)

320
300

59 68 77 86 95 104

(15) (20) (25) (30) (35) (40)

• Low Pressure

Outdoor fan speed

Low

Outdoor ambient temp. °F (°C)

High

Indoor
temp.
°F (°C)

85 (30)
80 (27)
75 (24)
70 (21)

1065_X_S

Low pressure characteristics versus outdoor ambient temperature and indoor temperature.
(Indoor relative humidity: 50%, Indoor fan speed: High)

230V / 208 V

170
160
150
140
130
120

Suction pressure (psig)

110

59 68 77 86 95 104

(15) (20) (25) (30) (35) (40)

Outdoor fan speed

Low

Outdoor ambient temp. °F (°C)

High

– 19 –

Indoor
temp.
°F (°C)

85 (30)
80 (27)
75 (24)
70 (21)

1066_X_S

SM830092

5. PERFORMANCE CHARTS

(2) High and Low Pressure

Indoor Unit: KS2462R Outdoor Unit: CL2462R

2

• High Pressure

High pressure characteristics versus outdoor ambient temperature and indoor temperature.
(Indoor relative humidity: 50%, Indoor fan speed: High)

230 / 208V

500
480
460
420
400
380
360
340

Discharge pressure (psig)

320
300

23 32 41 50

(–5) (0) (5) (10) (35) (40)

Low High

Outdoor ambient temp. °F (°C)

Outdoor fan speed

Med

59 68 77 86 95 104

(15) (20) (25) (30)

• Low Pressure

Low pressure characteristics versus outdoor ambient temperature and indoor temperature.
(Indoor relative humidity: 50%, Indoor fan speed: High)

Indoor
temp.
°F (°C)

85 (30)
80 (27)
75 (24)
70 (21)

1067_X_S

230 / 208V

170
160
150
140
130
120

Suction pressure (psig)

110

23 32 41 50

(–5) (0) (5) (10) (35) (40)

Outdoor fan speed

Low High

59 68 77 86 95 104

(15) (20) (25) (30)

Outdoor ambient temp. °F (°C)

Med

– 20 –

Indoor
temp.
°F (°C)

85 (30)
80 (27)
75 (24)
70 (21)

1068_X_S

SM830092

6. AIR THROW DISTANCE CHART

Indoor Unit: KS2462R

Room air temp. : 80°F (26.7°C)
Fan speed : High

Horizontal distance (ft.)

0

5

10

Axis air velocity (ft./sec.)

Vertical distance (ft.)

15

5 1015202530

: Flap angle 0° , : Axis air velocity 0 °
: Flap angle 30°, : Axis air velocity 30 °

2200_M_S

– 21 –

SM830092

7. REFRIGERANT FLOW DIAGRAM

Indoor Unit: KS2462R Outdoor Unit: C2462R

Indoor Unit Outdoor Unit

Wide tube

O. D.
3/4"
(19.05mm)

Evaporator

O. D.
3/4"
(19.05mm)

Wide tube
service valve

Accumulator

High
pressure
switch

LP

Compressor

HP

Narrow tube

O. D.
3/8"
(9.52 mm)

Narrow tube
service valve

O. D.
3/8"
(9.52 mm)

Capillary

tube

Strainer

Indoor Unit: KS2462R Outdoor Unit: CL2462R

Indoor Unit Outdoor Unit

O. D.
3/4"
(19.05mm)

Evaporator

Wide tube

O. D.
3/4"
(19.05mm)

Wide tube
service valve

Accumulator

Capillary

Sub-condenser

High
pressure
switch

HP

S

HGBV

Condenser

2201_M_S

LP

Compressor

Narrow tube

O. D.
3/8"
(9.52 mm)

O. D.
3/8"
(9.52 mm)

Narrow tube
service valve

– 22 –

Capillary

tube

Condenser

Strainer

Sub-condenser

2202_M_S

SM830092

8. INSTALLATION INSTRUCTIONS

1) Tubing Length

• Refrigerant tubing between the indoor and
outdoor units should be kept as short as

INDOOR
UNIT

Tubing length (L)

possible.

• Select and decide the installation location
so that the length of the refrigerant tubing

Elevation difference (H)

OUTDOOR
UNIT

will be within the limits given in Table 1.

Fig. 1

Table 3

Model Length at Shipment Length (L) Difference (H) Additional Refrigerant

C2462R, CL2462R 23 132 50 0.43

*

If total tubing length becomes 23 to 132 ft. (max.), additional refrigerant (R410A) charge of 0.43 oz./ft. is required.
No additional charge of compressor oil is necessary.

Max. Allowable Tubing Limit of Tubing Limit of Elevation Required Amount of

(ft.) (ft.) (ft.) (oz./ft.)

0711_M_I

*

– 23 –

SM830092

8. INSTALLATION INSTRUCTIONS

2) Selecting the Installation Site

Indoor Unit

AVOID:

areas where leakage of flammable gas may
be expected.
places where large amounts of oil mist
exist. (Fig. 2)
direct sunlight.
locations near heat sources which may
affect performance of the unit.
locations where external air may enter the
room directly. This may cause “sweating”
on the air discharge ports, causing them to
spray or drip. (Fig. 3)
locations where the remote control unit will
be splashed with water or affected by
dampness or humidity.

Indoor unit

Outside drainage

Drain hose

2203_M_S

Fig. 2

DO:

select an appropriate position from which
every corner of the room can be uniformly
air-conditioned.
select a location that will hold weight of the
unit.
select a location where the tubing and drain
pipe have the shortest run to the outside.
(Fig. 2)
allow room for operation and maintenance
as well as unrestricted air flow around the
unit. (Fig. 3a and 3b)
Install the unit within the maximum
elevation difference above or below the
outdoor unit and within a total tubing length
from the outdoor unit as detailed in Table 1
and Fig. 1 on the previous page.

6 inches

min.

INDOOR UNIT

CAUTION

6 inches min.

Front View

Fig. 3a

For stable operation of
the air conditioner, do
not install wall-mounted
type indoor units less
than 5 ft. from floor
level.

Fig. 3b

6 inches

min.

2204_M_S

Indoor Unit

Wall

Minimum height
from floor level
5 ft.

Floor level

2205_M_S

– 24 –

SM830092

8. INSTALLATION INSTRUCTIONS

Outdoor Unit

AVOID:

heat sources, exhaust fans, etc. Fig. 4
damp, humid or uneven locations.

DO:

choose a place as cool as possible.
choose a place that is well ventilated and
outside air temperature does not exceed
maximum 115 °F constantly.
allow enough room around unit for air intake/
exhaust and possible maintenance. Fig. 5
provide a solid base; about 6 inch above
grond level to reduce humidity and possible
water damage in the unit and decrease
service life. Fig. 6
use lug bolts or equivalent to bolt down unit,
reducing vibration and noise.

CAUTION

Min.
1 inch

Hot air

4 in.

Air in

Out­door
unit

Min. 2 ft.

Min.
1 inch

0931_C_I

Exhaust fan

Heat source

Fig. 4

Obstacle above

Air
dis­charge

Ground

Fig. 5

Air in

0591_C_I

Min.
7 ft.

0932_C_I

If more than 2 outdoor units are installed in the
same location, keep at least 3 meters away from
the neighboring unit to avoid influence of air
discharge.

Air discharge chamber for top discharge

Install the air-discharge chamber in the filed when:

it is difficult to keep a space of minimum 2 ft.
between the air-discharge outlet and the
obstacle.
the air-discharge outlet is facing the sidewalk
and discharged hot air can annoy the
passers-by.
Refer to Fig. 6 and Fig. 7.

– 25 –

Air
discharge

Concrete block
4 inch 1 ft. 4 inch
beams or equal

Anchor bolts
(4 pieces)

Min. 6 inch

0934_C_I

Fig. 6

Air discharge

0426_C_I

Fig. 7

SM830092

8. INSTALLATION INSTRUCTIONS

IMPORTANT

Wind shield
(air discharge side)

Front

3 -

ø1-9/16"

hole

6 -

ø15/64" hole

9-27/32"21-5/8"15/16"

5-3/16"

22-7/16"1/2"

23-15/32"

21-13/16"

5-5/32"9-27/32"9-27/32"1-1/16"

21-13/16"

Wind Shield for "CL" Model

It is recommended to use wind shields for "CL" model
(Fig. 5b). "CL" model is designed to use in low outdoor
temperature conditions.

General

When the outdoor unit is installed in a position exposed
to strong wind (like seasonal winds with low air tempera­ture in winter), a suitable wind shield must be installed
on the outdoor unit.

This unit is designed so that the fan of the outdoor unit
runs at low speed when the air conditioner is operated at
low outdoor air temperatures. When the outdoor unit is
exposed to strong wind, the system pressure drops
because of the freeze protector.

Fig. 5b

Recommended outer dimensions of wind shield
(field supply)

For outer dimensions of the wind shield, see Fig. 5c.

CL2462R

Fig. 5c

SM830092

– 26 –

8. INSTALLATION INSTRUCTIONS

3) Electrical Wiring
General Precautions on Wiring

(1) Before wiring, confirm the rated voltage of

the unit as shown on its nameplate, then
carry out the wiring closely following the
wiring diagram.

Provide a power outlet to be used

(2)

exclusively for each unit, and a power
supply disconnect and circuit breaker for
overcurrent protection should be
provided in the exclusive line.

(3) T

o prevent possible hazards from

insulation

failure, the unit must be grounded.

(4) Each wiring connection must be done in

accordance with the wiring system
diagram. Wrong wiring may cause the
unit to misoperate or become damaged.

(5) Do not allow wiring to touch the refrigerant

tubing, compressor, or any moving parts
of the fan.

(6) Unauthorized changes in the internal

wiring can be very dangerous. The
manufacturer will accept no repsonsibility
for any damage or misoperation that
occurs as a result of such unauthorized
changes.

(7) Regulations on wire diameters differ from

locality to locality. For field wiring rules,
please refer to your LOCAL ELECTRICAL
CODES before beginning. You must
ensure that installation complies with all
relevant rules and regulations.

– 27 –

SM830092

8. INSTALLATION INSTRUCTIONS

7-2. Recommended Wire Length and Wire Diameter for Power Supply System

Time Delay
Fuse or
Circuit
Capacity

Models

*1

Power Supply

(A)

(B)*1 Inter-unit

Wiring

AGW #14

C2462R, CL2462R 64 ft. (AWG #12) 35 A

132 ft.

*1 Refer to the Wiring System Diagrams (See below diagram) for the meaning of “A” and “B.”

AWG = American Wire Gauge

Disconnect SW

1
2

G

4

(Field supply)

Ground

(B)

1
2

G

4

NOTE

To access the electrical component box, open the air
intake grille and remove the electrical component box
cover.

7-3. Wiring System Diagram

Outdoor Unit: “C”, “CL” models
Single-phase

Indoor Unit Outdoor Unit

60 Hz, 208/230 V

L1
L2

(A)

G

Ground

– 28 –

SM830092

9. ELECTRICAL DATA

Electrical characteristics

Indoor model: KS2462R / Outdoor model: C2462R, CL2462R

Indoor Unit Outdoor Unit

Fan Motor Fan Motor Compressor

Performance at 230 - 208 V / 1 phase / 60 Hz

A 0.38 - 0.37 0.90 - 0.90 8.8 - 9.6 10.1 - 10.9

Rating conditions

kW 0.08 - 0.07 0.18 - 0.17 2.02 - 2.00 2.25 - 2.24

A 0.38 - 0.37 0.90 - 0.90 11.1 - 12.4 12.4 - 13.7

Full load conditions

kW 0.08 - 0.07 0.18 - 0.17 2.55 - 2.58 2.81 - 2.32

Starting amperes A 1 - 1 1 - 1 61 - 55 63 - 57

Complete Unit

Rating Conditions : Indoor Air Temperature 80 °F DB / 67 °F WB

Outdoor Air Temperature 95 °F DB

Full Load Conditions : Indoor Air Temperature 80 °F DB / 67 °F WB

Outdoor Air Temperature 115 °F DB

– 29 –

SM830092

10. ELECTRICAL WIRING DIA GRAMS

(1) Indoor Unit

KS2462R

1

• Electric Wiring Diagram

FAN MOTOR

FMI

GRN / YEL

G

G

TERMINAL

PLATE

WHT

BLK

G

GRN
RED

1
2
G
4

FROM

OUTDOOR UNIT

BLK

VLT

YEL

ORG

87654321
87654321

CONNECTOR

[WHT]

FLP

PNK

BRN

GRY

WHT

CONNECTOR

[WHT]

CAPACITOR

PNK
BRN
GRY
WHT

VLT
ORG
YEL

BLK

[WHT] [WHT]

1

1

2

2

3

3

4

4

5

5

WHT

BLU
BLU
BLU
BLU

FLAP MOTOR [UPPER]

CONNECTOR

[WHT] [GRN] [BLK]

FLP

*

FLAP MOTOR [LOWER]

WHT

1

1

BLU

2

2

BLU

3

3

BLU

4

4

BLU

5

5

1
2
3
4
5

1
2
3
4
5

GRN

w

G

FM

w
w

HH

w

H

w

M

w

L

w

LL

1
2

FLAP1

3

5P [WHT]

4
5

1
2

FLAP2

3

5P [BLK]

4
5

135
135

SUP
5P [WHT]

PRY
3P [RED]

SEC
2P [WHT]

RECEIVER
3P [WHT]

LAMP
4P [WHT]

CONTROLLER

ROOM/COIL
4P [WHT]

WHT

1

WHT

313

121

3
2
1

1
2
3
4

BRN
BRN

2
3

WHT

2

GRY

1

GRY
WHT

1

GRY

2

GRY

3

GRY

4

P

S

1

1

2

2

3

3

4

4

5

5

6

6

7

7

COIL THERMISTOR (TH1)

BLK

1

1

BLK

2

2

BLK

3

3

BLK

4

4

ROOM THERMISTOR (TH2)

8512-5253-714XX-1 (KS2432A)

POWER

TRANSFORMER

IND LAMP ASSY

– 30 –

SM830092

10. ELECTRICAL WIRING DIA GRAMS

Outdoor Unit

C2462R

• Electric Wiring Diagram

7

TERMINAL PLATE (6P)

TO INDOOR UNIT

L1
L2

G

POWER SUPPLY

60Hz 1ø 208V/230V

RED

1
2

WHT

G

WHT

4

L1

RED

L2

2Y

13

8

5

6

24

RED

WHT
BLK

RED

2P (WHT)

1

1

2

2

PS
PS

1

1

2

2

2P (GRN)

BLK
BLK

RED
RED

63PH

63PL

EARTH

TERMINAL

GRN/YEL

EARTH

TERMINAL

YEL

52C

BRN

A

B

C

RED

U

RED

R

CM

WHT

BLK

BLK

BLU

S

BLU

TWSVR

RC1

WHT

13

14

RED

BRN
BRN

23S

BLK

3

L

H

6

2

C

31

776

8
8

YEL

1Y

8P

(WHT)

7

5

14

8

32

RC2

PNK

BRN

GRY

GRY

WHT

VLT

P

1

32

54

6

3

1

54

2

S

PNK

BRN

GRY

GRY

WHT

VLT

FMO

49FO

– 31 –

854-2-5269-160-00-0

SM830092

10. ELECTRICAL WIRING DIA GRAMS

Outdoor Unit

C2462R

• Schematic Diagram

TERMINAL
PLATE (6P)

– 1

– 2

– G

– 4

– L1

– L2

52C

2Y

2Y

2Y52C

1

63PH

2

2

63PL

1

1

49FO

2

1Y
HM

65

FMO

C

23S

LH

RC1

R

S

C

1Y

12

RC2

CM

52C

854-2-5269-160-00-0

Symbols Description

CM
FMO
52C
49FO
63PH
63PL Low Pressure Switch
23S
RC1, 2
1Y, 2Y

Compressor Motor
Outdoor Fan Motor
Compressor Motor Magnetic Contactor
Outdoor Fan Motor Thermal Protector
High Pressure Switch

Fan Speed Control Thermostat
Running Capacitor
Auxiliary Relay
Terminal Base
Connector

– 32 –

SM830092

10. ELECTRICAL WIRING DIA GRAMS

Outdoor Unit

CL2462R

BLK

21

BLK

TEMP

2P (WHT)

BRN

21

BRN

SEC

2P (WHT)

WHT

31

WHT

PRY

3P(WHT)

RED

31

RED

HGBV

3P(YEL)

CONTROLLER (CR-CL2432)

9
7
5

HCOM M L

FMO

31

9P(WHT)

AC14V

AC208V

BRN

TH

TR

AC230V

YEL
VLT
WHT
BLK
GRY
BRN
PNK

HGBV

S7

P
87

8

65

65

43

43

21

21

YEL
VLT
WHT
GRY
GRY
BRN
PNK

854-2-5269-159-00-0

49FO

FMO

13

ST 31
R

1Y

BRN

24

13

8

BRN
BLK

WHT

52C

EARTH

TERMINAL

14

UV W 32

B

RC2

ORG

RED

WHT

BLK
RED

MGSW
3

ORG

E

GRN/YEL

ORG

ORG

6

5

7

3P(RED)

SUP

2

1

RED

3P(BLU)

1

GRY

• Electric Wiring Diagram

GRN/YEL

A

RED

BRN

RED

WHT

RED

WHT

WHT

8P

P
21

2P

P
21

2P

P
21

2P

(WHT)

S
21

(GRN)

S
21

(WHT)

S
21

(WHT)

RC1

RED
RED

BLK
BLK

WHT
WHT

WHT
BLK

R

63PL

63PH

CH

S

CM

C

PLATE (6P)

1

2

TERMINAL

4

G

L1

L1

L2

TO INDOOR UNIT

L2

G

60Hz 1ø 208V/230V

POWER SUPPLY

– 33 –

EARTH

TERMINAL

SM830092

10. ELECTRICAL WIRING DIA GRAMS

Outdoor Unit

CL2462R

TERMINAL
PLATE (6P)

-1

-2

-G

-4

-L1

-L2

52C

C

1Y

R

CM

• Schematic Diagram

F1 (3A)

1

1 3

3

52C

52C

1

CH

63PL

1Y

RC1

S

2

F2 (3A)

3

49FO

1

63PH

2

1Y

4

2

1

3

52C

RY2

HLM

RC2

RY1

FMO

1

75 9

65 7

RY3

1

HGBV

2

3

1

COMCOM

RY1

RY2

RY3

CR-CL2462R

CONTROLLER

TEMP

L

PRY

M

HGBV

DC12V

SEC

TH

1
2

OUTDOOR
TEMPERATURE

TR

1

AC 208V

3

230V

1

AC 14V

2

854-2-5269-159-00-0

Symbols Description

CM
CH
FMO
52C
49FO
63PH
63PL
HGBV
TR
TH
RC1, 2
RY1~3, 1Y
CR-CL2432
F1, 2

Compressor Motor
Crankcase Heater
Outdoor Fan Motor
Compressor Motor Magnetic Contactor
Outdoor Fan Motor Thermal Protector
High Pressure Switch
Low Pressure Switch
Hot Gas Bypass Valve
Power Transformer
Thermistor (Outdoor Temperature)
Running Capacitor
Auxiliary Relay
Outdoor Controller
Fuse
Terminal Base
Connector
Terminal

– 34 –

SM830092

11. PROCESSES AND FUNCTIONS

(1) Room Temperature 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 indoor unit.
The figures shows 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. 1 shows about the cooling cycle.

Signal from remote control unit

3 minutes 3 minutes 3 minutes 3 minutes 3 minutes 3 minutes 3 minutes

T + 2 °F

T °Fset temp.

More than

5 minutes

ON OFF ON OFF ON OFFCompressor

Thermo.

OFF

Thermo.
ON

Thermo.
OFF

3 minutes5 minutes

Thermo.
ON

Thermo.
ON

Room temp.

Thermo.
ON

Thermo.
OFF

Outdoor fan

Indoor fan

ON OFF ON OFF ON OFF

Set speed

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 1 °F above the set temperature T˚, (T ˚+1 °F):

Compressor ON

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

Compressor OFF

2212_M_S

Fig. 11

– 35 –

SM830092

11. PROCESSES AND FUNCTIONS

(2) Dry Operation (Dehumidification)

Dry operation uses the ability of the cooling cycle to remove moisture from the air, but by
running at low level to dehumidify without greatly reducing the room temperature. The air
conditioner repeats the cycle of turning ON and OFF automatically as shown in the chart
below according to the room temperature.

Room temp.

Cooling operation

T + 4 °F

Set temp. T °F

T – 2 °F

Room temp. 59 °F

Dry A zone

Compressor :
FMI (indoor fan) :

Dry B zone

Compressor :
FMI (indoor fan) :

Monitor zone
Both the indoor and outdoor units stop.

Continuous operation
L (low speed) / LL (very low speed) intermittent ventilation

only while the compressor is ON.

Intermittent operation (ON for 3 minutes and OFF for 9 minutes)
L (low speed) / LL (very low speed) intermittent ventilation

only while the compressor is ON.

Fig. 12

2213_M_S

NOTE

Intermittent ventilation occurs by switching the indoor fan speed between L LL.
Dry operation does not occur when the room temperature is under 59°F, which is the monitor zone.
When the compressor stops, the indoor fan stops as well.

– 36 –

SM830092

11. PROCESSES AND FUNCTIONS

(3) 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.

Thermo. OFF

Room temp.

T + 4 °F

Set temp. T °F

Thermo. ON

Indoor heat exch.
coil temp.

30 °F

Compressor

Indoor fan

When the compressor has been running for 6 minutes or more and the temperature of the
indoor heat exchange coil falls below 30°F, the control circuit stops the compressor for at
least 6 minutes. The compressor does not start again until the temperature rises above
46°F or 6 minutes has elapsed.

More than

6 minutes

More than

10 minutes

ON ON ON ON

Set speed

More than

10 minutes

6 minutes

OFFOFF

Set speed

Fig. 13

Chart Summary and Explanations

2214_M_S

– 37 –

SM830092

11. PROCESSES AND FUNCTIONS

(4) Outdoor Fan Speed Control

(1) C2462R Type

• 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 78 °F, the outdoor fan is set from HIGH to
LOW automatically. When the outdoor temperature rises to 82 °F, the outdoor fan is
set from LOW to HIGH automatically.

(2) CL2462R Type

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

• When the outdoor temperature falls below 77 °F, the outdoor fan is set from HIGH to
MED automatically. When the outdoor temperature rises to 81 °F, the outdoor fan is
set from MED to HIGH automatically.

• When the outdoor temperature falls below 59 °F, the outdoor fan is set from MED to
LOW automatically. When the outdoor temperature rises to 63 °F, the outdoor fan is
set from LOW to MED automatically.

• When the outdoor temperature falls below 50 °F, the hot gas bypass valve opens
and keeps the pressures up by allowing some hot gas to be bypassed to the suction
of the compressor.

FAN ROTATION RPM

HGBV

(HOT GAS

BYPASS VALVE)

760

380

230

ON

M

L

OFF

47

(8.3)50(10)

OUTDOOR AIR TEMPERATURE °F DB

59

(15)63(17)

77

(25)81(27)

H

2217_X_S

– 38 –

Fig. 14

SM830092

12. SERVICE PROCEDURES

(1) Troubleshooting

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.

Check power supply wiring

1

(a) Single-phase

Check that power supply wires are correctly connected to L1 and L2 on the
6P terminal in the outdoor unit.

Check inter-unit wiring

2

Check that inter-unit wiring (AC 230 - 208 V Line voltage) is correctly con­nected between the indoor unit and outdoor unit.

Single-phase outdoor unit

Indoor Unit Outdoor Unit

1
2

G

4

Disconnect
switch
(Field supply)

Inter-Unit Wiring
(Line voltage)

230V/208V

230V/208V
Grounding line
230V/208V

(B)

6P Terminal4P Terminal

1
2
G

(A)

4
L1
L2

G

Power supply
Single phase
230V/208V 60Hz

Grounding line

2206_M_S

Fig. 15

Check power supply

3

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 touch any uninsulated live part that can cause ELECTRIC
SHOCK.

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

4

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.

Reference

5

• Condition of general cooling operation (Thermo. ON)

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

Indoor fan speed .... HIGH

– 39 –

SM830092

12. SERVICE PROCEDURES

2) Air Conditioner does not Operate

Circuit breaker trips (or fuse blows).

1

(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 2 MΩ or less, it is a defect of insulation.

(Example)

1 3

Outdoor

unit

L1

Circuit
breaker

*Set the circuit breaker to OFF.

Power
supply
cords

+
+

Ground

L2

G

2

1

+

2

+

G

4

+

Inter-unit
power line

Indoor

4

unit

1

+

2

+

G

4

+

1

Remove power supply cords
from the terminal plate in
the outdoor unit.

• Check insulation resistance
of power supply cords.

OK

Remove inter-unit power line

2

from the terminal plate in
the outdoor unit.

• Check insulation resistance
of outdoor unit.

OK

3

Remove inter-unit power line
from the terminal plate in
the indoor unit.

• Check insulation resistance
of indoor unit.

NO

NO Insulation of

NO

Execute
rewiring.

outdoor unit
is defective.

Insulation of
outdoor unit
is defective.

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

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

OK

Inter-unit power lines are
defective.

Execute
rewiring.

1032_X_S

SM830092

– 40 –

12. SERVICE PROCEDURES

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

• There is a possibility of short circuit.

• Check capacity of circuit
breaker.

NO

Is capacity of circuit
breaker sufficient ?

• Check resistance of
outdoor fan motor winding.

• Check resistance of
compressor motor winding.

• Check resistance of flap
motor winding.

Neither indoor unit nor outdoor unit runs.

2

A. Power is not supplied

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

2218_X_S

• Check power supply.
Is power being supplied

NO

to outdoor unit ?

B. Check remote control unit.

• Try to run both indoor and

outdoor units with another
remote control unit.

OK

The other remote control
unit is defective.

– 41 –

Circuit breaker
is tripped.

Power failure.

Reset the breaker.

Wait for recovery
or consult power
supply company.

0615_X_S

0616_X_S

SM830092

12. SERVICE PROCEDURES

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

• Has “Operation selector”
switch been set to ON

YES

position ?

NO

Set “Operation selector”
switch to ON.

But neither unit runs.

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

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

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

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

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

0617_X_S

YES

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

NO

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

E. Transformer in indoor unit.

• Check resistance of
transformer winding. (TR1)

1033_X_S

YES

Clean heat exchanger coil
or remove obstacles.

0618_X_S

– 42 –

SM830092

12. SERVICE PROCEDURES

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

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

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

0620_X_S

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

When the fuse blows.

• Check resistance of
primary and secondary
winding of transformer.

OK

• Check resistance of indoor
fan motor winding.

OK

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

OK

• P.C.B. Ass'y is defective.

2219_X_S

– 43 –

SM830092

12. SERVICE PROCEDURES

3) Outdoor Unit does not Run.

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

• Is MODE selector button
set to COOL ?

B. Check set temperature.

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

YES

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

Outdoor unit runs.

Is room temperature too
low ?

NO

Set to COOL.

2220_X_S

NO

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

OK

The other remote control
unit is defective.

2221_X_S

– 44 –

SM830092

12. SERVICE PROCEDURES

C. Check compressor motor magnetic contactor.

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

D. Check indoor unit P.C.B.

• Check P.C.B. Ass’y.

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

1035_X_S

No voltage appears.

P.C.B. Ass’y is defective.

0628_X_S

E. Check outdoor unit P.C.B. (CL2462R Type)

• Check P.C.B. Ass’y.

• Check voltage between
terminals L1 and L2 at
terminal plate.

No voltage appears.

P.C.B. Ass’y is defective.

1036_X_S

– 45 –

SM830092

12. SERVICE PROCEDURES

4) Indoor Unit does not Run.

(Indoor fan and flap motor do not run.)

P.C.B. Ass’y is defective.

0630_X_S

5) Some Part does not Operate.

A. Indoor fan does not run.

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

Fan cannot
be rotated.

Check fan casing
for foreign matter
on the inside.

Fan motor burnout
or foreign matter
in bearing.

Remove foreign
matter or repair.

Repair or replace.

• Check resistance of fan
motor winding.

OK

• Check fan motor capacitor.
OK

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

B. Flap motor does not run.

• Check resistance of

flap motor winding.

OK

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

0631_X_S

2222_X_S

– 46 –

SM830092

12. SERVICE PROCEDURES

6) Outdoor Fan does not Run.

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

• Check resistance of fan
motor winding.

OK

• Check fan motor capacitor

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

Fan cannot
be rotated.

• Check fan casing
for foreign matter
on the inside.

• Fan motor burnout
or foreign matter
in bearing.

Remove foreign
matter or repair.

Repair or replace.

0633_X_S

7) Outdoor Fan Speed is not Switched from High to Low even when the Outdoor
Temperature Falls below 78

• Check the thermostat (23S).

1037_X_S

°F. (C2462R Type)

8) Outdoor Fan Speed is not Switched from High to Med even when the Outdoor
Temperature Falls below 77

°F.

Outdoor Fan Speed is not Switched from Med to Low even when the Outdoor
Temperature Falls below 59

• Check outdoor unit P.C.B.
Ass’y

°F. (CL2462R Type)

OK

• Check resistance of outdoor
temp sensor.

0722 _X_S

SM830092

– 47 –

12. SERVICE PROCEDURES

9) Outdoor Fan does not Run for CL2462R.

• Check fuse on PCB Ass’y in
outdoor unit for continuity.

If fuse blows,

• Check resistance of primary
winding of transformer. (TR)

10) Compressor does not Run.

1038_X_S

• Check compressor motor capacitor
(RC1).

OK

• Check PTC.
OK

• Check resistance of compressor
motor winding.

Wait for 30 minutes until com­ pressor has cooled.

Compressor runs.

Compressor internal thermal
protector is operated.

• Check power supply voltage.
Is voltage abnormally low?

NO

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

1039_X_S

– 48 –

SM830092

12. SERVICE PROCEDURES

11) 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 ?

YES

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

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

• Check clogging of air
filter.

• Is fan speed set to LOW ?

YES

NO

Temperature
difference
is small.

Possibility of
refrigerant
shortage.

Air filter is clogged.

YES

Change installation
position of remote
control unit.

Insulate wide tube and
then execute taping with
narrow tube.

Charge
refrigerant

Clean filter.

Set fan speed to either
HIGH or MEDIUM.

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

12) 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 ?

YES

NO

– 49 –

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

1040_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.

0637_X_S

SM830092

12. SERVICE PROCEDURES

(2) A Sensor is Defective.

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

1

(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.

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

2

(a) Open (=No continuity in sensor)

Neither outdoor fan nor compressor runs.

(b) Short

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

– 50 –

SM830092

12. SERVICE PROCEDURES

(3) Checking the Electrical Components

1) Measurement of Insulation
Resistance

•

The electrical insulation is acceptable
when the resistance exceeds 2 MΩ.

Power Supply Wires

1

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. 16)

Then measure the resistance between
the earthed wire and the other power
wires. (Fig. 16)

Indoor Unit

2

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. 17)

Probe

Copper
tube or
metallic part

Clip

Clip

Earthed wire

Insulation
tester

Terminal plate

0638_X_S

Insulation
tester

Probe

0639_X_S

Fig. 16

Fig. 17

Outdoor Unit

3

Measure the resistance by placing a
probe on the terminal plate in the same
manner as explained above 2 . (Fig. 17)

Measurement of Insulation Re-

4

sistance for Electrical parts

• Disconnect the connector of the
desired electric part from terminal
plate, P.C.B. Ass’y, etc. (Fig. 18)

•

Similarly, disconnect the lead wires from
compressor, capacitor, etc. (Fig. 19)

• 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.

Metallic
part

– 51 –

Clip

Copper
tube or
metallic part

Clip

Insulation
tester

From fan motor,
compressor and other
parts.

Probe

Insulation
tester

Probe

0640_X_S

0641_X_S

Fig. 18

Fig. 19

SM830092

12. SERVICE PROCEDURES

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. 20.

• The Protective Device is proved normal if there is a continuity between terminals.

socket

Multimeter

Ω

0642_X_S

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

1

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

• Check the socket’s terminals.

Compressor motor thermal protector . . . . . . Outdoor unit

2

• Disconnect the wires from terminals of compressor.

• Check the terminals of compressor.

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

3

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

• Check socket’s terminal.

Fig. 20

– 52 –

SM830092

12. SERVICE PROCEDURES

3) Checking the Electrical Parts

Power transformer ...........................Indoor unit *Measure the coil resistance.

1

• Primary230-208 V ; Measure the resistance between two WHT lead wire terminals

of socket connected to power transformer.

• Secondary 19 V ; Measure the resistance between two BRN lead wires.

Power transformer (TR) ................. Outdoor unit *Measure the coil resistance.

2

• Primary 230-208 V ; Measure the resistance between two WHT lead wire terminals

of socket jointed to power transformer.

• Secondary 19 V ; Measure the resistance between two BRN lead wires.

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

3

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

indoor fan motor.

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

4

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

Motor capacitor ............ Both in indoor and outdoor unit

5

• Remove the lead wires from the

capacitor terminals, and then place a
probe on the capacitor terminals as
shown in Fig. 21. Observe the deflec­tion of the pointer, setting the resis­tance measuring range of the multim­eter to the maximum value.

• The capacitor is “good” 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.

Multimeter

Ω

– 53 –

Compressor motor
capacitor

Fig. 21

Fan motor
capacitor

1041_X_S

SM830092

12. SERVICE PROCEDURES

Continuity of fuse on P.C.B.

6

Ass’y

• Check for continuity using a multim­eter as shown in Fig. 22.

NOTE

Method Used to Replace Fuse on
PCB Ass’y

1. Remove the PCB Ass’y from the

electrical component box.

2. Remove the fuse from PCB Ass’y

using pliers while heating the sol­dered leads on the back side of the
PCB Ass’y with a soldering iron (30W
or 60W). (Fig. 23)

3. For replacement, insert a fuse of the

same rating to the intended position
and solder it.
(Allow time to radiate heat during sol­dering so that the fuse does not melt.)

When replacing the

CAUTION

fuse, be sure not to
break down the
varistor.

Fuse

1042_X_S

Fig. 22

Soldering iron

PCB Ass’y

Fuse Varistor

Pliers

1043_X_S

Fig. 23

– 54 –

SM830092

12. SERVICE PROCEDURES

CAUTION

11. REFRIGERANT R410A: SPECIAL PRECAUTIONS WHEN INSTALLING UNIT

11-1. Characteristics of New Refrigerant R410A
11-1-1. What is New Refrigerant R410A?

R410A is a new refrigerant that contains two types of pseudo-non-azeotropic refrigerant mixture which do
not adversely affect the earth’s ozone layer. Its refrigeration capacity and energy efficiency are about the
same level as the conventional refrigerant, R22.

11-1-2. Components (mixing proportions)

HFC32 (50%) / HFC125 (50%)

11-1-3. Characteristics

Less toxic, more chemically stable refrigerant
The composition of refrigerant R410A changes whether it is in a gaseous phase or liquid phase. Thus, when

there is a refrigerant leak the basic performance of the air conditioner may be degraded because of a change
in composition of the remaining refrigerant.
remaining refrigerant with the refrigerant recovery unit. Then, after evacuation, totally recharge the specified
amount of refrigerant with the new refrigerant at its normal mixed composition state (in liquid phase).

Therefore, do not add new refrigerant.

Instead, recover the

When refrigerant R410A is used, the composition will differ depending on whether it is in gaseous or liquid
phase, and the basic performance of the air conditioner will be degraded if it is charged while the refrigerant

is in gaseous state.

Thus, always charge the refrigerant while it is in liquid phase.

Ether-type oil is used for compressor oil for R410A-type units, which is different
from the mineral oil used for R22. Thus more attention to moisture prevention and
faster replacement work compared with conventional models are required.

11-2. Checklist Before Installation

Use a clutch-type flare tool for R410A or the conventional flare tool. Note that sizes of the resultant flares differ
between these two tools. Where a conventional flare tool is used, make sure to observe A Specification

(amount of protrusion).

Diameter of tube (ø) D

ø6.35 (1/4") 0 – 0.5 mm 1.0 – 1.5 mm

ø19.05 (3/4") 0 – 0.5 mm 1.0 – 1.5 mm

Size of flare

Flare tool for R410A Conventional flare tool (for R22)

D

A Specification

D

A

Flare tool for R410A

A

Conventional flare tool (R22)

Flare nut: Because the new refrigerant R410A operates at 1.6 times higher pressure than the conventional

refrigerant R22, the flare nuts that came with the unit must be used.

– 55 –

SM830092

12. SERVICE PROCEDURES

Tubing precautions

Refrigerant R410A is more easily affected by dust or moisture compared to R22, thus be sure to temporarily
cover the ends of the tubing with caps or tape prior to installation.

Never use 0.7mm-thick copper tubing or tubing which is less than 0.8mm in thickness, since air conditioners
with R410A are subject to higher pressure than those using R22 and R407C.

Outer diameter: mm (inch) Tubing wall thickness: mm (inch)

Narrow tube ø6.35 (1/4") 0.8 (0.032)
Wide tube ø19.05 (3/4") 1.0 (0.042)

No addition of compressor oil for R410A

No additional charge of compressor oil is required.

No use of refrigerant other than R410A

Never use a refrigerant other than R410A.

If refrigerant R410A is exposed to fire

Through welding, etc., toxic gas may be released when R410A refrigerant is exposed to fire. Therefore, be
sure to provide ample ventilation during installation work.

Caution in case of R410A leak

Check for possible leak points with the special leak detector for R410A. If a leak occurs inside the room,
immediately provide thorough ventilation.

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SM830092

12. SERVICE PROCEDURES

11-3. Tools Specifically for R410A

For servicing, use the following tools for R410A

Tool Distinction Tool Name

Gauge manifold
Charging hose
Gas leak detector
Refrigerant cylinder
Charging cylinder
Refrigerant recovery unit

Tools specifically for R410A

Tools which can be com­monly used for R22,
R407C, and R410A

Vacuum pump with anti-reverse flow ( 1)
(Solenoid valve-installed type, which prevents oil from flowing back into the

unit when the power is off, is recommended.)
Vacuum pump ( 2) … can be used if the following adapter is attached.
Vacuum pump adapter (reverse-flow prevention adapter) ( 3).
(Solenoid valve-installed adapter attached to a conventional vacuum pump.)
Electronic scale for charging refrigerant
Flare tool
Bender
Torque wrench
Cutter, reamer
Welding machine, nitrogen gas cylinder

CAUTION

To prevent other refrigerants (R22, R407C) from being mistakenly charged to this unit, sizes of the service
ports and flare nuts of the narrow tube service valve and wide tube service valve have been altered.

The above tools specifically for R410A must not be used for R22 and R407C.
Doing so will cause malfunction of the unit.

For the above vacuum pump ( 1, 2) and vacuum pump adapter ( 3), those for
R22-type units can be used for R407C-type. However, they must be used exclu­sively for R410A and never alternately with R22 and R407C.

SM830092

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SM830092