Argo FCR512CL, AWR509CL, AFR509CL, AWR512CL, AER508SCLA Technical & Service Manual

TECHNICAL& SERVICE MANUAL

AWR508CL + AER508SCLA
AWR509CL + AER509SCLA

AFR509CL + AER509SCLA

Indoor Unit

Outdoor Unit

SPLIT SYSTEM AIR CONDITIONER

AWR508CL
AWR509CL
AWR512CL

AER508SCLA
AER509SCLA
AER512SCLA

FCR512CL + AER512SCLA

AWR512CL + AER512SCLA

Ceiling-Mounted

Floor-Mounted

FCR512CL

AFR509CL

0.8180.169.0 02/2001

®

i

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
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.

WARNING

CAUTION

WARNING

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 Ceiling or Wall

Make sure the ceiling/wall is strong enough to hold the
units weight. It may be necessary to construct a strong
wood or metal frame to provide added support.

…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 Systems)

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

When Connecting Refrigerant Tubing

• 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 leak­free connection.

• Check carefully for leaks before starting the test run.

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 after you finish, remembering to
check that no metal scraps or bits of wiring have
been left inside the unit being serviced.

Others

• Ventilate any enclosed areas when installing or
testing the refrigeration system. Escaped refrigerant
gas, on contact with fire or heat, can produce
dangerously toxic gas.

• Confirm upon completing installation that no
refrigerant gas is leaking. If escaped gas comes in
contact with a stove, gas water heater, electric room
heater or other heat source, it can produce
dangerously toxic gas.

CAUTION

Table of Contents

Page

1 OPERATING RANGE 1
2 SPECIFICATIONS

2-1 Unit Specification 2
2-2 Major Component Specifications 7

2-3 Other Component Specifications 15
3 DIMENSIONAL DATA 18
4 REFRIGERANT FLOW DIAGRAM 21
5 PERFORMANCE DATA

5-1 Air Throw Distance Chart 23
5-2 Performance Charts 26
5-3 Cooling Capacity 29

6 ELECTRICAL DATA

6-1 Electrical Characteristic 34

6-2 Electric Wiring Diagrams 36
7 INSTALLATION INSTRUCTIONS

7-1 Installation Site Selection 39
7-2 Remote Control Unit Installation Position 41
7-3 Recommended Wire Length and Diameter 42

8 FUNCTION
8-1 Room Temperature Control 43
8-2 Dry Operation 44
8-3 Freeze prevention 45
8-4 Outdoor fan speed control 46

9 REFRIGERANT R407C:SPECIAL PRECAUTION WHEN SERVICING UNIT
9-1 Characteristics of new refrigerant R407c 47
9-2 Checklist before servicing 47
9-3 Tools specifically for R407c 48
9-4 For tubing installation procedures 48
9-5 In case of compressor malfunction 49
9-6 In case refrigerant is leaking 51
9-7 Charging additional refrigerant 53
9-8 Retro-fitting existing systems 53

10 TROUBLESHOOTING

10-1 Check before and after troubleshooting 54

10-2 Air Conditioner Does not operate 55

10-3 Some Parts of Air Conditioner does not operate 59
10-4 Air Conditioner Operates, but abnormalities are observed 61
10-5 If a sensor is defective 62

11 CHECKING ELECTRICAL COMPONENTS
11-1 Measurements of insulation resistence 63
11-2 Checking continuity of fuse on PCB ass’y 64
11-3 Checking motor capacitor 64

12 DISASSEMBLY PROCEDURE FOR INDOOR UNIT
12-1 Removing air intake grille 65
12-2 Removing side panels 66
12-3 Access and removal of electrical components box 66
12-4 Removing flap motor 67
12-5 Removing evaporator 67
12-6 Removing fan and fan motor 69

APPENDIX Instructions manual 70

1

1. OPERATING RANGE

Temperature Indoor Air Intake Temp. Outdoor Air Intake Temp.

Cooling

Maximum 32°C D.B. / 23°C W.B. 43°C D.B.

Minimum 19°C D.B. / 14°C W.B. -15°C D.B.

2

2. SPECIFICATIONS

2-1. Unit Specifications

Indoor Unit AWR508CL
Outdoor Unit AER508SCLA

Power Source 220–240V ~ 50Hz
Voltage rating 230 V
Performance Cooling

Capacity kW 2.05

BTU/h 6,991

Air circulation (High)

m3/h 430

Moisture removal (High) Liters/h 0.4

Electrical Rating Cooling

Available voltage range V 198 ~ 264
Running amperes A 3.2
Power input W 680
Power factor % 92
C.O.P. W/W 3.01
Compressor locked rotor amperes A 17

Features

Controls / Temperature control Microprocessor / I.C. thermostat
Control unit Wireless remote control unit
Timer ON/OFF 24 hours & Daily program,1-hour OFF
Fan speeds Indoor / Outdoor 3 and Auto / 1(Hi)
Airflow direction (Indoor) Horizontal Manual

Vertical Auto
Air filter Washable, Anti-Mold
Compressor Rotary (Hermetic)
Refrigerant / Amount charged at shipment g R407c / 730
Refrigerant control Capillary tube
Operation sound Indoor : Hi / Me / Lo dB-A 37 / 32 / 31

Outdoor : Hi dB-A 43
Refrigerant tubing connections Flare type
Max. allowable tubing length at shipment m 7.5
Refrigerant Narrow tube mm (in.) 6.35(1/4)
tube diameter Wide tube mm (in.) 9.52(3/8)
Refrigerant tube kit / Accessories Optional / Air Clean Filter

Dimensions & Weight Indoor Unit Outdoor Unit

Unit dimensions Height mm 270 540

Width mm 805 700

Depth mm 177 265
Package dimensions Height mm 243 568

Width mm 855 815

Depth mm 332 343
Weight Net kg 8.0 34.0

Shipping kg 10.0 37.0
Shipping volume

m

3

0.07 0.16

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Remarks:

Rating conditions are:
Cooling : Indoor air temperature 27°C D.B. / 19°C W.B.
Outdoor air temperature 35°C D.B. / 24°C W.B.

3

Indoor Unit AWR509CL
Outdoor Unit AER509SCLA

Power Source 220–240V ~ 50Hz
Voltage rating 230 V
Performance Cooling

Capacity kW 2.55

BTU/h 8700

Air circulation (High)

m3/h 470

Moisture removal (High) Liters/h 0.9

Electrical Rating Cooling

Available voltage range V 198 ~ 264
Running amperes A 4.4
Power input W 940
Power factor % 92
C.O.P. W/W 2.7
Compressor locked rotor amperes A 23

Features

Controls / Temperature control Microprocessor / I.C. thermostat
Control unit Wireless remote control unit
Timer ON/OFF 24 hours & Daily program,1-hour OFF
Fan speeds Indoor / Outdoor 3 and Auto / 1(Hi)
Airflow direction (Indoor) Horizontal Manual

Vertical Auto
Air filter Washable, Anti-Mold
Compressor Rotary (Hermetic)
Refrigerant / Amount charged at shipment g R407c / 800
Refrigerant control Capillary tube
Operation sound Indoor : Hi / Me / Lo dB-A 37 / 32 / 31

Outdoor : Hi dB-A 43
Refrigerant tubing connections Flare type
Max. allowable tubing length at shipment m 7.5
Refrigerant Narrow tube mm (in.) 6.35(1/4)
tube diameter Wide tube mm (in.) 9.52(3/8)
Refrigerant tube kit / Accessories Optional / Air Clean Filter

Dimensions & Weight Indoor Unit Outdoor Unit

Unit dimensions Height mm 270 540

Width mm 805 700

Depth mm 177 265
Package dimensions Height mm 243 568

Width mm 855 815

Depth mm 332 343
Weight Net kg 8.0 36.0

Shipping kg 10.0 37.0
Shipping volume

m

3

0.07 0.16

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Remarks:

Rating conditions are:
Cooling : Indoor air temperature 27°C D.B. / 19°C W.B.
Outdoor air temperature 35°C D.B. / 24°C W.B.

4

Indoor Unit AFR509CL
Outdoor Unit AER509SCLA

Power Source 220–240V ~ 50Hz
Voltage rating 230 V
Performance Cooling

Capacity kW 2.55

BTU/h 8700

Air circulation (High)

m3/h 380

Moisture removal (High) Liters/h 0.7

Electrical Rating Cooling

Available voltage range V 198 ~ 264
Running amperes A 4.4
Power input W 940
Power factor % 92
C.O.P. W/W 2.7
Compressor locked rotor amperes A 23

Features

Controls / Temperature control Microprocessor / I.C. thermostat
Control unit Wireless remote control unit
Timer ON/OFF 24 hours & Daily program,1-hour OFF
Fan speeds Indoor / Outdoor 3 and Auto / 1(Hi)
Airflow direction (Indoor) Horizontal Manual

Vertical Manual
Air filter Washable, Anti-Mold
Compressor Rotary (Hermetic)
Refrigerant / Amount charged at shipment g R407c / 800
Refrigerant control Capillary tube
Operation sound Indoor : Hi / Me / Lo dB-A 37 / 32 / 31

Outdoor : Hi dB-A 43
Refrigerant tubing connections Flare type
Max. allowable tubing length at shipment m 7.5
Refrigerant Narrow tube mm (in.) 6.35(1/4)
tube diameter Wide tube mm (in.) 9.52(3/8)
Refrigerant tube kit / Accessories Optional / Air Clean Filter

Dimensions & Weight Indoor Unit Outdoor Unit

Unit dimensions Height mm 700 540

Width mm 560 700

Depth mm 200 265
Package dimensions Height mm 770 568

Width mm 620 815

Depth mm 265 343
Weight Net kg 18 36.0

Shipping kg 20 37.0
Shipping volume

m

3

0.07 0.16

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Remarks:

Rating conditions are:
Cooling : Indoor air temperature 27°C D.B. / 19°C W.B.
Outdoor air temperature 35°C D.B. / 24°C W.B.

5

Indoor Unit AWR512CL
Outdoor Unit AER512SCLA

Power Source 220–240V ~ 50Hz
Voltage rating 230 V
Performance Cooling

Capacity kW 3.30

BTU/h 11400

Air circulation (High)

m3/h 490

Moisture removal (High) Liters/h 1.3

Electrical Rating Cooling

Available voltage range V 198 ~ 264
Running amperes A 6.5
Power input W 1380
Power factor % 92
C.O.P. W/W 2.4
Compressor locked rotor amperes A 33

Features

Controls / Temperature control Microprocessor / I.C. thermostat
Control unit Wireless remote control unit
Timer ON/OFF 24 hours & Daily program,1-hour OFF
Fan speeds Indoor / Outdoor 3 and Auto / 1(Hi)
Airflow direction (Indoor) Horizontal Manual

Vertical Auto
Air filter Washable, Anti-Mold
Compressor Rotary (Hermetic)
Refrigerant / Amount charged at shipment g R407c / 750
Refrigerant control Capillary tube
Operation sound Indoor : Hi / Me / Lo dB-A 39 / 35 / 33

Outdoor : Hi dB-A 45
Refrigerant tubing connections Flare type
Max. allowable tubing length at shipment m 7.5
Refrigerant Narrow tube mm (in.) 6.35(1/4)
tube diameter Wide tube mm (in.) 12.7(1/2)
Refrigerant tube kit / Accessories Optional / Air Clean Filter

Dimensions & Weight Indoor Unit Outdoor Unit

Unit dimensions Height mm 270 540

Width mm 805 700

Depth mm 177 265
Package dimensions Height mm 243 568

Width mm 855 815

Depth mm 332 343
Weight Net kg 8.0 37.0

Shipping kg 10.0 40.0
Shipping volume

m

3

0.07 0.16

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Remarks:

Rating conditions are:
Cooling : Indoor air temperature 27°C D.B. / 19°C W.B.
Outdoor air temperature 35°C D.B. / 24°C W.B.

6

Indoor Unit FCR512CL
Outdoor Unit AER512SCLA

Power Source 220–240V ~ 50Hz
Voltage rating 230 V
Performance Cooling

Capacity kW 3.30

BTU/h 11400

Air circulation (High)

m3/h

700

Moisture removal (High) Liters/h 1.30

Electrical Rating Cooling

Available voltage range V 198 ~ 264
Running amperes A 6.5
Power input W 1.380
Power factor % 92
C.O.P. W/W 2.4
Compressor locked rotor amperes A 33

Features

Controls / Temperature control Microprocessor / I.C. thermostat
Control unit Wireless remote control unit
Timer ON/OFF 24 hours & Daily program,1-hour OFF
Fan speeds Indoor / Outdoor 3 and Auto / 1(Hi)
Airflow direction (Indoor) Horizontal Manual

Vertical Auto
Air filter Washable, Anti-Mold
Compressor Rotary (Hermetic)
Refrigerant / Amount charged at shipment g R407c / 750
Refrigerant control Capillary tube
Operation sound Indoor : Hi / Me / Lo dB-A 39 / 35 / 33

Outdoor : Hi dB-A 45
Refrigerant tubing connections Flare type
Max. allowable tubing length at shipment m 7.5
Refrigerant Narrow tube mm (in.) 6.35(1/4)
tube diameter Wide tube mm (in.) 12.7(1/2)
Refrigerant tube kit / Air Clean Filter Optional / Optional

Dimensions & Weight

Indoor Unit

Outdoor Unit

Unit dimensions Height mm 680 530

Width mm 900 750

Depth mm 190 270
Package dimensions Height mm 813 593

Width mm 1,011 895

Depth mm 296 348
Weight Net kg 23.5 35.5

Shi pp in g kg 30.0 38.0
Shipping volume

m

3

0.24 0.18

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Remarks:

Rating conditions are:
Cooling : Indoor air temperature 27°C D.B. / 19°C W.B.
Outdoor air temperature 35°C D.B. / 24°C W.B.

7

2-2. Major Component Specifications

2-2-1. Indoor Unit

Indoor Unit AWR508CL

Controller PCB

Part No. POW-K8E(A), POW-K8E(B)
Controls Microprocessor
Control circuit fuse 250 V 3.15 A

Remote Control Unit RCS-8PS3E

Fan & Fan Motor

Type Cross-flow
Q'ty ... Dia. and length mm 1 ... ø95 / L617
Fan motor model ... Q'ty KFV4Q-11H5P-S ... 1
No. of poles ... rpm (230 V, High) 4 ... 1,130
Nominal output W 10
Coil resistance (Ambient temp. 20°C) Ω BRN-WHT : 561.8

VLT-WHT : 197.4

VLT-ORG : 63.4

YEL-ORG : 155.7

YEL-PNK : 115.9

Safety devices Type Internal fuse

Operating temp. Open °C 145±2

Close —

Run capacitor µF 0.6

VAC 440

Flap Motor

Type Stepping motor
Model MP24GA1
Rating DC 12 V
Coil resistance (Ambient temp. 25°C) Ω WHT – BLU (respectively 4 wires) : 380 ± 7%

Heat Exch. Coil

Coil Aluminum plate fin / Copper tube
Rows 2
Fin pitch mm 1.4
Face area

m

2

0.130

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

8

Indoor Unit AWR509CL

Controller PCB

Part No. POW-K8E(A), POW-K8E(B)
Controls Microprocessor
Control circuit fuse 250 V 3.15 A

Remote Control Unit RCS-8PS3E

Fan & Fan Motor

Type Cross-flow
Q'ty ... Dia. and length mm 1 ... ø95 / L617
Fan motor model ... Q'ty KFV4Q-11H5P-S ... 1
No. of poles ... rpm (230 V, High) 4 ... 1,190
Nominal output W 10
Coil resistance (Ambient temp. 20°C) Ω BRN-WHT : 561.8

VLT-WHT : 197.4

VLT-ORG : 63.4

YEL-ORG : 155.7

YEL-PNK : 115.9

Safety devices Type Internal fuse

Operating temp. Open °C 145±2

Close —

Run capacitor µF 0.8

VAC 440

Flap Motor

Type Stepping motor
Model MP24GA1
Rating DC 12 V
Coil resistance (Ambient temp. 25°C) Ω WHT – BLU (respectively 4 wires) : 380 ± 7%

Heat Exch. Coil

Coil Aluminum plate fin / Copper tube
Rows 2
Fin pitch mm 1.4
Face area

m

2

0.130

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

9

Indoor Unit AWR512CL

Controller PCB

Part No. POW-K8E(A), POW-K8E(B)
Controls Microprocessor
Control circuit fuse 250 V 3.15 A

Remote Control Unit RCS-8PS3E

Fan & Fan Motor

Type Cross-flow
Q'ty ... Dia. and length mm 1 ... ø95 / L617
Fan motor model ... Q'ty KFV4Q-11H5P-S ... 1
No. of poles ... rpm (230 V, High) 4 ... 1,230
Nominal output W 10
Coil resistance (Ambient temp. 20°C) Ω BRN-WHT : 561.8

VLT-WHT : 197.4

VLT-ORG : 63.4

YEL-ORG : 155.7

YEL-PNK : 115.9

Safety devices Type Internal fuse

Operating temp. Open °C 145±2

Close —

Run capacitor µF 1.0

VAC 440

Flap Motor

Type Stepping motor
Model MP24GA1
Rating DC 12 V
Coil resistance (Ambient temp. 25°C) Ω WHT – BLU (respectively 4 wires) : 380 ± 7%

Heat Exch. Coil

Coil Aluminum plate fin / Copper tube
Rows 2
Fin pitch mm 1.4
Face area

m

2

0.130

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

10

Indoor Unit AFR509CL

Controller PCB

Part No. POW-K185GS5-N
Controls Microprocessor
Control circuit fuse 250 V 3 A

Remote Control Unit RCS-5PS3E

Fan & Fan Motor

Type Cross-flow
Q'ty ... Dia. and length mm 1 ... ø100 / L410
Fan motor model ... Q'ty KR35406M01527
No. of poles ... rpm (230 V, High) 4 ... 1,140
Nominal output W 27
Coil resistance (Ambient temp. 20°C) Ω GRY-WHT : 545 - 630

WHT-VLT : 92 - 105

VLT-YEL : 62 - 71

BRN-YEL : 78 - 90

——

Safety devices Type Internal protector

Operating temp. Open °C 150±10

Close Automatic reclosing

Run capacitor µF 0.6

VAC 400

Heat Exch. Coil

Coil Aluminum plate fin / Copper tube
Rows 2
Fin pitch mm 1.4
Face area

m

2

0.185

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

11

Indoor Unit FCR512CL

Controller PCB

Part No. POW-K185GS-N
Controls Microprocessor
Control circuit fuse 250 V 3 A

Remote Control Unit RCS-5PS3E

Fan & Fan Motor

Type Cross-flow
Q'ty ... Dia. and length mm 2 ... ø130 / L180
Fan motor model ... Q'ty K48407-M01416 ... 1
No. of poles ... rpm (230 V, High) 4 ... 1,160
Nominal output W 20
Coil resistance (Ambient temp. 20°C) Ω GRY-WHT : 311±7%

WHT-VLT : 97.6±7%

VLT-YEL : 97.6±7%

WHT-PNK : 425±7%

——

Safety devices Type Internal protector

Operating temp. Open °C 145±5

Close Automatic reclosing

Run capacitor µF 1.5

VAC 440

Flap Motor

Model M2LJ24ZE31
Rating AC 208 / 230 V, 50 / 60 Hz
No. of poles ... rpm 8 ... 2.5 / 3.0
Nominal output W 3 / 2.5
Coil resistance (Ambient temp. 20°C) kΩ 16.45 ± 15%

Heat Exch. Coil

Coil Aluminum plate fin / Copper tube
Rows 2
Fin pitch mm 1.8
Face area

m

2

0.192

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

12

2-2-2. Outdoor Unit

Outdoor Unit AER508SCLA

Compressor

Type Rotary (Hermetic)
Compressor model C-1RN60H5C 802-060-35B
Nominal output W 600
Compressor oil ... Amount cc DAPHNE FV68S ... 350
Coil resistance (Ambient temp. 25°C) Ω C–R : 4.66

C–S : 8.89

Safety devices Type External(OLR A) External(OLR T)

Overload relay MRA38072-3229 CS-7C115
Operating temp. Open °C 145±5 115±3

Close °C 69±11 95±5

Operating amp.(Ambient temp. 25°C) Trip in 6 to 16 sec. at 13A —

Run capacitor µF 17.5

VAC 450

Crank case heater —

Fan & Fan Motor

Type Propeller
Q'ty ... Dia. 1 ... ø370
Fan motor model ... Q'ty KR35410M01846 ... 1
No. of poles ... rpm (230 V, High) 6 ... 770
Nominal output W 20
Coil resistance (Ambient temp. 25°C) Ω BLK-WHT : 211-242 / WHT-VLT : 244-281

VLT-YEL: 83.5-96.1 / BLK-PNK : 41.7-48

Safety devices Type Internal fuse

Operating temp. Open °C 150±10

Close °C —

Run capacitor µF 1.5

VAC 450

Heat Exch. Coil

Coil Aluminum plate fin / Copper tube
Rows 1
Fin pitch mm 1.3
Face area

m

2

0.353

External Finish Acrylic baked-on enamel finish

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

13

Outdoor Unit AER509SCLA

Compressor

Type Rotary (Hermetic)
Compressor model C-RN80H5A 802-282-45G
Nominal output W 800
Compressor oil ... Amount cc DAPHNE FV68S ... 470
Coil resistance (Ambient temp. 25°C) Ω C–R : 3.070

C–S : 7.97

Safety devices Type External(OLR A) External(OLR T)

Overload relay MRA38066-3229 CS-7C115
Operating temp. Open °C 150±5 115±3

Close °C 69±11 95±5

Operating amp.(Ambient temp. 25°C) Trip in 6 to 16 sec. at 16A —

Run capacitor µF 22.5

VAC 450

Crank case heater —

Fan & Fan Motor

Type Propeller
Q'ty ... Dia. 1 ... ø370
Fan motor model ... Q'ty KR35410M01846 ... 1
No. of poles ... rpm (230 V, High) 6 ... 800
Nominal output W 56
Coil resistance (Ambient temp. 25°C) Ω BLK-WHT : 211-242 / WHT-VLT: 244-281

VLT-YEL : 83.5-96.1 / BLK-PNK: 41.7-48

Safety devices Type Internal fuse

Operating temp. Open °C 150±10

Close °C —

Run capacitor µF 1.5

VAC 450

Heat Exch. Coil

Coil Aluminum plate fin / Copper tube
Rows 1
Fin pitch mm 1.3
Face area

m

2

0.353

External Finish Acrylic baked-on enamel finish

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

14

Outdoor Unit AER512SCLA

Controller PCB

Part No. POW-CLR128E
Control circuit fuse 250 V 3.15 A

Compressor

Type Rotary (Hermetic)
Compressor model C-R110H5HB 80235645B-S
Nominal output W 1,100
Compressor oil ... Amount cc DAPHNE FV68S ... 510
Coil resistance (Ambient temp. 25°C) Ω C–R : 1.962

C–S : 5.38

Safety devices Type External(OLR A) External(OLR T)

Overload relay MRA98596-9201 CS-7C115
Operating temp. Open °C 150±5 115±3

Close °C 69±11 95±5

Operating amp.(Ambient temp. 25°C) Trip in 6 to 16 sec. at 21A —

Run capacitor µF 25.0

VAC 400

Crank case heater 240 V 20 W

Fan & Fan Motor

Type Propeller
Q'ty ... Dia. 1 ... ø400
Fan motor model ... Q'ty KR35410M01846 ... 1
No. of poles ... rpm (230 V, High) 6 ... 770
Nominal output W 20
Coil resistance (Ambient temp. 25°C) Ω BLK-WHT : 211-242

WHT-VLT : 244-281

VLT-YEL : 83.5-96.1

BLK-PNK : 41.7-48.0

Safety devices Type Internal fuse

Operating temp. Open °C 145±2

Close °C —

Run capacitor µF 2.0

VAC 450

Heat Exch. Coil

Coil Aluminum plate fin / Copper tube
Rows 1
Fin pitch mm 1.3
Face area

m

2

0.379

External Finish Acrylic baked-on enamel finish

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

2-3. Other Component Specifications

115

Outdoor Unit AER508SCLA

AER509SCLA
AER512SCLA

Thermistor (Room sensor) DTN-TKS134B

Resistance kΩ 25°C 5.0 ± 3%

Thermistor (Coil sensor) DTN-TKS131B

Resistance kΩ 0°C 15.0 ± 2%

Transformer (TR) ATR-J105

Rating Primary AC 230V, 50/60Hz

Secondary 19V, 0.526A
Capacity 10VA

Coil resistance Ω (at 21°C) Primary (WHT – WHT): 205 ± 10%

Secondary (BRN – BRN): 2.0 ± 10%

Thermal cut-off temp. 150°C

Indoor Unit AWR508CL

AWR509CL
AWR512CL

Thermistor (Coil sensor TH1) PBC–41E–S4

Resistance kΩ –20°C 40.1± 5% 20°C 6.5± 5%

–10°C 24.4± 5% 30°C 4.4± 5%

0°C 15.3± 5% 40°C 3.0± 5%

10°C 9.9± 5% 50°C 2.1± 5%

Power Relay (PR) G7L-2A-TUB

Coil rating AC 200–240V, 50/60Hz
Coil resistance Ω (at 23°C) 21 ± 15%
Contact rating AC 220V, 25A

Transformer (TR2) ATR-J65

Rating Primary AC 230V, 50Hz

Secondary 19V, 0.315A
Capacity 6VA

Coil resistance Ω (at 22°C) Primary (WHT – WHT): 455 ± 10%

Secondary (BRN – BRN): 2.85 ± 10%

Thermal cut-off temp. 145°C

15

16

Transformer (TR) ATR-H85

Rating Primary AC 235V, 50Hz

Secondary 11V, 0.727A
Capacity 8VA

Coil resistance Ω (at 21°C) Primary (WHT – WHT): 214 ± 10%

Secondary (BRN – BRN): 1.58 ± 10%

Thermal cut-off temp. 145°C, 2A, 250V

Thermistor (Coil sensor TH1) DHPBC-41ES-14N

Resistance kΩ –20°C40.1 ±5%

–10°C24.4 ±5%

0°C15.3 ±5%

-10°C9.9 ±5%

Thermistor (Room sensor TH2) DHKTEC-35-S6N

Resistance kΩ -20°C 10 ±5%

-10° 7.9 ±5%

-20°C6.3 ±5%

-10°C5.0 ±5%

Indoor Unit AFR509CL

17

Transformer (TR) ATR-H85

Rating Primary AC 230V, 50/60Hz

Secondary 11V, 0.727A
Capacity 8VA

Coil resistance Ω (at 21°C) Primary (WHT – WHT): 214 ± 10%

Secondary (BRN – BRN): 1.58 ± 10%

Thermal cut-off temp. 145°C, 2A, 250V

Thermistor (Coil sensor TH1) PBC-41E-S14

Resistance kΩ –20°C 40.1 ± 5% 20°C 6.5 ± 5%

–10°C 24.4 ± 5% 30°C 4.4 ± 5%

0°C 15.3 ± 5% 40°C 3.0 ± 5%

10°C 9.9 ± 5% 50°C 2.1 ± 5%

Thermistor (Room sensor TH2) KTEC-35-S6

Resistance kΩ 10°C 10.0 ± 4% 30°C 4.0 ± 4%

15°C 7.9 ± 4% 35°C 3.3 ± 4%
20°C 6.3 ± 4% 40°C 2.7 ± 4%
25°C 5.0 ± 4% 50°C 1.8 ± 4%

Indoor Unit FCR512CL

18

3. DIMENSIONAL DATA

Indoor Unit FCR512CL

Remote control unit

86

74 74

Center of tubing hole
ø75 (4 places)

Wide tube ø12.7 (1/2")
Narrow tube ø6.35 (1/4")

Drain hose ø26

74 74

900

86

41

41

190

680

18.5

61

172.5

Unit : mm

19

Indoor Unit AWR508CL

AWR509CL
AWR512CL

58.599.5

805 177

41.0

41.0 270

Narrow tube ø6.35 (1/4")

Wide tube ø9.52 (3/8") AWR508,AWR509
Wide tube ø12.7 (1/2") AWR512

Center of tubing
hole (2 places)

Drain hose ø18

Remote control unit

18.5

61

172.5

Unit : mm

20

Outdoor Unit AER508SCLA

AER509SCLA
AER512SCLA

700

540

15

255

Narrow tube service valve
ø6.35 (1/4")

Wide tube service valve
ø9.52 (3/8")
ø12.7 (1/2")

170

103 57

470

4 – ø12 holes

116

320

294

Air intake

Air discharge

AER508,AER509
AER512

Unit : mm

4. REFRIGERANT FLOW DIAGRAM

21

Indoor Unit

AWR508CL
AWR509CL

Outdoor Unit AER508SCLA

AER509SCLA

Compressor

Accumulator

Wide tube
service
valve

Wide tube

O.D.
ø9.52 mm
(3/8 ")

Narrow
tube
service
valve

Narrow tube

O.D.
ø6.35 mm
(1/4")

Condenser

Capillary tube

Indoor Unit Outdoor Unit

Evaporator

Muffler

Indoor Unit AWR512CL Outdoor Unit AER512SCLA

Compressor

Accumulator

Wide tube
service
valve

Wide tube

Narrow
tube
service
valve

Narrow tube

O.D.
ø6.35 mm
(1/4")

Condenser

Capillary tube

Indoor Unit Outdoor Unit

Evaporator

Muffler

O.D.
ø12.7 mm
(1/2 ")

AFR509CL

FCR512CL

22

Insulation of Refrigerant Tubing

Because capillary tubing is used in the outdoor unit, both the
wide and narrow tubes of this air conditioner become cold. To
prevent heat loss and wet floors due to dripping of
condensation, both 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 cause the tube
to break or crack.

IMPORTANT

CAUTION

Wide tube

Thickness:
Min. 8 mm

Insulation

Narrow tube

Thickness:
Min. 8 mm

5. PERFORMANCE DATA

5-1. Performance charts

23

Indoor inlet air

D.B. temp. (°C)

1.38 (13)

1.28 (12)

1.18 (11)

1.08 (10)

0.98 ( 9 )

0.89 ( 8 )

0.79 ( 7 )

0.69 ( 6 )

25 30 35 40 45 50

Outdoor inlet air D.B. temp. (°C)

Low pressure at wide tube service valve MPa (kgf/cm

2

G)

0.59 ( 5 )

0.49 ( 4 )

0.39 ( 3 )

■ Cooling Characteristics

9
8
7
6
5
4
3
2
1

25 30 35 40 45 50

Outdoor inlet air D.B. temp. (°C)

Operating current (A)

10

Indoor inlet air

D.B. temp. (°C)

32
27

19.4

32
27

19.4

32
27

19.4

● ...... Points of Rating condition

Black dots in above charts indicate the following rating conditions.

Cooling: Indoor air temperature 27°C D.B./19°C W.B.

Outdoor air temperature 35°C D.B./24°C W.B.

NOTE

Indoor Unit AWR508CL
Outdoor Unit AER508SCLA

24

Indoor inlet air

D.B. temp. (°C)

1.38 (13)

1.28 (12)

1.18 (11)

1.08 (10)

0.98 ( 9 )

0.89 ( 8 )

0.79 ( 7 )

0.69 ( 6 )

25 30 35 40 45 50

Outdoor inlet air D.B. temp. (°C)

Low pressure at wide tube service valve MPa (kgf/cm

2

G)

0.59 ( 5 )

0.49 ( 4 )

0.39 ( 3 )

■ Cooling Characteristics

9
8
7
6
5
4
3
2
1

25 30 35 40 45 50

Outdoor inlet air D.B. temp. (°C)

Operating current (A)

10

Indoor inlet air

D.B. temp. (°C)

32
27

19.4

32
27

19.4

● ...... Points of Rating condition

Black dots in above charts indicate the following rating conditions.

Cooling: Indoor air temperature 27°C D.B./19°C W.B.

Outdoor air temperature 35°C D.B./24°C W.B.

NOTE

Indoor Unit AWR509CL AFR509CL
Outdoor Unit AER509SCLA

25

Indoor inlet air

D.B. temp. (°C)

1.38 (13)

1.28 (12)

1.18 (11)

1.08 (10)

0.98 ( 9 )

0.89 ( 8 )

0.79 ( 7 )

0.69 ( 6 )

25 30 35 40 45 50

Outdoor inlet air D.B. temp. (°C)

Low pressure at wide tube service valve MPa (kgf/cm

2

G)

0.59 ( 5 )

0.49 ( 4 )

0.39 ( 3 )

■ Cooling Characteristics

11
10

9
8
7
6
5
4
3

25 30 35 40 45 50

Outdoor inlet air D.B. temp. (°C)

Operating current (A)

12

Indoor inlet air

D.B. temp. (°C)

32
27

19.4

32
27

19.4

● ...... Points of Rating condition

Black dots in above charts indicate the following rating conditions.

Cooling: Indoor air temperature 27°C D.B./19°C W.B.

Outdoor air temperature 35°C D.B./24°C W.B.

NOTE

Indoor Unit AWR512CL FCR512CL
Outdoor Unit AER512SCLA

26

5-2. Air Throw Distance Chart

Indoor Unit AWR508CL

0

123456789

1

2

3

4

Horizontal distance (m)

Axis air velocity (m/s)

Vertical distance (m)

Axis air verocity

Flap angle

0°

30°

Room air temp. : 27°C
Fan speed : High

Indoor Unit AWR509CL

0

123456789

1

2

3

4

Horizontal distance (m)

Axis air velocity (m/s)

Vertical distance (m)

Axis air verocity

Flap angle

0°

30°

Room air temp. : 27°C
Fan speed : High

26

27

Indoor Unit AWR512CL

0

123456789

1

2

3

4

Horizontal distance (m)

Axis air velocity (m/s)

Vertical distance (m)

Axis air verocity

Flap angle

0°

30°

Room air temp. : 27°C
Fan speed : High

28

Indoor Unit FCR512CL

01234567

01234567

3

4

2

1

0

1

0

2

3

4

Horizontal distance (m)

Horizontal distance (m)

Axis air velocity (m/s)

Vertical distance (m)

Axis air velocity (m/s)

Vertical distance (m)

Room air temp. : 27°C
Fan speed : High

Axis air verocity

Flap angle

60°

45°

Axis air verocity

Flap angle

45°

30°

Floor mounted

Ceiling mounted

RATING CAPACITY 2.05 kW
AIR FLOW RATE 430 m³/h

EVAPORATOR CONDENSER
ENT.TEMP. °C OUTDOOR AMBIENT TEMP. °C

W.B. D.B. 25 30 35 40 43

TC 1.94 1.89 1.80 1.68 1.56

CM 0.56 0.60 0.64 0.70 0.77
21 SHC 1.33 1.31 1.26 1.21 1.15
23 SHC 1.51 1.48 1.44 1.38 1.32

15 25 SHC 1.68 1.65 1.60 1.55 1.49

27 SHC 1.86 1.82 1.78 1.68 1.56
29 SHC 1.94 1.89 1.80 1.68 1.56
31 SHC 1.94 1.89 1.80 1.68 1.56

TC 2.10 2.02 1.93 1.81 1.67

CM 0.57 0.61 0.66 0.73 0.79
21 SHC 1.17 1.13 1.09 1.03 0.97
23 SHC 1.34 1.30 1.26 1.20 1.14

17 25 SHC 1.52 1.48 1.43 1.38 1.31

27 SHC 1.69 1.64 1.60 1.55 1.48
29 SHC 1.87 1.82 1.77 1.72 1.65
31 SHC 2.05 1.99 1.93 1.81 1.67

TC 2.23 2.15 2.05 1.93 1.77

CM 0.60 0.63 0.68 0.75 0.81
21 SHC 0.98 0.94 0.90 0.85 0.78
23 SHC 1.15 1.12 1.07 1.02 0.96

19 25 SHC 1.31 1.29 1.24 1.19 1.13

27 SHC 1.48 1.46 1.42 1.36 1.30
29 SHC 1.65 1.63 1.59 1.54 1.47
31 SHC 1.82 1.80 1.76 1.71 1.64

TC 2.36 2.28 2.17 2.04 1.88

CM 0.61 0.65 0.70 0.77 0.83
23 SHC 0.96 0.93 0.89 0.83 0.77

21 25 SHC 1.13 1.10 1.06 1.01 0.94

27 SHC 1.30 1.27 1.23 1.18 1.11
29 SHC 1.46 1.44 1.40 1.35 1.29
31 SHC 1.64 1.62 1.57 1.52 1.46

TC 2.52 2.42 2.28 2.13 1.99

CM 0.63 0.67 0.72 0.78 0.85

23 25 SHC 0.95 0.90 0.86 0.80 0.75

27 SHC 1.11 1.07 1.03 0.97 0.92
29 SHC 1.27 1.25 1.20 1.15 1.09
31 SHC 1.46 1.42 1.37 1.31 1.27

TC: TOTAL COOLING CAPACITY kW
SHC: SENSIBLE HEAT CAPACITY kW
CM: COMPRESSOR INPUT kW
RATING CONDITIONS

OUTDOOR AMBIENT TEMPERATURE 35°C D.B.
INDOOR UNIT ENTERING AIR TEMP. 27°C D.B./19°C W.B.

5-3. Cooling Capacity

Indoor Unit AWR508CL
Outdoor Unit

AER508SCLA

230V Single Phase 50Hz

29

RATING CAPACITY 2.55 kW
AIR FLOW RATE 470 m³/h

EVAPORATOR CONDENSER
ENT.TEMP. °C OUTDOOR AMBIENT TEMP. °C

W.B. D.B. 25 30 35 40 43

TC 2.42 2.34 2.23 2.10 1.93

CM 0.77 0.83 0.89 0.97 1.06
21 SHC 1.66 1.62 1.57 1.50 1.42
23 SHC 1.88 1.84 1.79 1.72 1.64

15 25 SHC 2.09 2.05 2.00 1.93 1.85

27 SHC 2.31 2.27 2.21 2.10 1.93
29 SHC 2.42 2.34 2.23 2.10 1.93
31 SHC 2.42 2.34 2.23 2.10 1.93

TC 2.62 2.52 2.39 2.25 2.07

CM 0.79 0.85 0.91 1.00 1.09
21 SHC 1.45 1.41 1.35 1.29 1.20
23 SHC 1.67 1.62 1.56 1.50 1.42

17 25 SHC 1.89 1.83 1.78 1.71 1.63

27 SHC 2.11 2.05 1.99 1.92 1.85
29 SHC 2.33 2.26 2.21 2.14 2.06
31 SHC 2.54 2.47 2.39 2.25 2.07

TC 2.77 2.68 2.55 2.39 2.21

CM 0.83 0.88 0.94 1.03 1.12
21 SHC 1.21 1.18 1.12 1.05 0.98
23 SHC 1.43 1.39 1.34 1.27 1.19

19 25 SHC 1.64 1.60 1.55 1.49 1.40

27 SHC 1.85 1.82 1.76 1.70 1.62
29 SHC 2.05 2.03 1.97 1.91 1.83
31 SHC 2.27 2.25 2.19 2.12 2.05

TC 2.94 2.84 2.71 2.54 2.34

CM 0.85 0.90 0.97 1.06 1.15
23 SHC 1.20 1.16 1.10 1.04 0.96

21 25 SHC 1.40 1.37 1.32 1.25 1.18

27 SHC 1.62 1.59 1.53 1.47 1.39
29 SHC 1.82 1.80 1.75 1.68 1.60
31 SHC 2.04 2.01 1.96 1.90 1.82

TC 3.14 3.00 2.84 2.66 2.47

CM 0.87 0.92 0.99 1.08 1.18

23 25 SHC 1.18 1.13 1.06 1.00 0.93

27 SHC 1.38 1.34 1.28 1.21 1.14
29 SHC 1.58 1.55 1.49 1.42 1.36
31 SHC 1.81 1.77 1.70 1.64 1.57

TC: TOTAL COOLING CAPACITY kW
SHC: SENSIBLE HEAT CAPACITY kW
CM: COMPRESSOR INPUT kW
RATING CONDITIONS

OUTDOOR AMBIENT TEMPERATURE 35°C D.B.
INDOOR UNIT ENTERING AIR TEMP. 27°C D.B./19°C W.B.

Outdoor Unit

Indoor Unit AWR509CL

AER509SCLA

230V Single Phase 50Hz

30

RATING CAPACITY 2.55 kW
AIR FLOW RATE 380 m³/h

EVAPORATOR CONDENSER
ENT.TEMP. °C OUTDOOR AMBIENT TEMP. °C

W.B. D.B. 25 30 35 40 43

TC 2.42 2.34 2.23 2.10 1.93

CM 0.77 0.83 0.89 0.97 1.06
21 SHC 1.66 1.62 1.57 1.50 1.42
23 SHC 1.88 1.84 1.79 1.72 1.64

15 25 SHC 2.09 2.05 2.00 1.93 1.85

27 SHC 2.31 2.27 2.21 2.10 1.93
29 SHC 2.42 2.34 2.23 2.10 1.93
31 SHC 2.42 2.34 2.23 2.10 1.93

TC 2.62 2.52 2.39 2.25 2.07

CM 0.79 0.85 0.91 1.00 1.09
21 SHC 1.45 1.41 1.35 1.29 1.20
23 SHC 1.67 1.62 1.56 1.50 1.42

17 25 SHC 1.89 1.83 1.78 1.71 1.63

27 SHC 2.11 2.05 1.99 1.92 1.85
29 SHC 2.33 2.26 2.21 2.14 2.06
31 SHC 2.54 2.47 2.39 2.25 2.07

TC 2.77 2.68 2.55 2.39 2.21

CM 0.83 0.88 0.94 1.03 1.12
21 SHC 1.21 1.18 1.12 1.05 0.98
23 SHC 1.43 1.39 1.34 1.27 1.19

19 25 SHC 1.64 1.60 1.55 1.49 1.40

27 SHC 1.85 1.82 1.76 1.70 1.62
29 SHC 2.05 2.03 1.97 1.91 1.83
31 SHC 2.27 2.25 2.19 2.12 2.05

TC 2.94 2.84 2.71 2.54 2.34

CM 0.85 0.90 0.97 1.06 1.15
23 SHC 1.20 1.16 1.10 1.04 0.96

21 25 SHC 1.40 1.37 1.32 1.25 1.18

27 SHC 1.62 1.59 1.53 1.47 1.39
29 SHC 1.82 1.80 1.75 1.68 1.60
31 SHC 2.04 2.01 1.96 1.90 1.82

TC 3.14 3.00 2.84 2.66 2.47

CM 0.87 0.92 0.99 1.08 1.18

23 25 SHC 1.18 1.13 1.06 1.00 0.93

27 SHC 1.38 1.34 1.28 1.21 1.14
29 SHC 1.58 1.55 1.49 1.42 1.36
31 SHC 1.81 1.77 1.70 1.64 1.57

TC: TOTAL COOLING CAPACITY kW
SHC: SENSIBLE HEAT CAPACITY kW
CM: COMPRESSOR INPUT kW
RATING CONDITIONS

OUTDOOR AMBIENT TEMPERATURE 35°C D.B.
INDOOR UNIT ENTERING AIR TEMP. 27°C D.B./19°C W.B.

Outdoor Unit

Indoor Unit AFR509CL

AER509SCLA

31

RATING CAPACITY 3.3 kW
AIR FLOW RATE 490 m³/h

EVAPORATOR CONDENSER
ENT.TEMP. °C OUTDOOR AMBIENT TEMP. °C

W.B. D.B. 25 30 35 40 43

TC 3.13 3.03 2.89 2.71 2.50

CM 1.14 1.21 1.30 1.43 1.56
21 SHC 2.14 2.10 2.03 1.94 1.84
23 SHC 2.43 2.38 2.31 2.22 2.12

15 25 SHC 2.71 2.65 2.58 2.50 2.40

27 SHC 2.99 2.93 2.86 2.71 2.50
29 SHC 3.13 3.03 2.89 2.71 2.50
31 SHC 3.13 3.03 2.89 2.71 2.50

TC 3.39 3.26 3.10 2.91 2.68

CM 1.16 1.25 1.34 1.47 1.60
21 SHC 1.88 1.82 1.75 1.66 1.56
23 SHC 2.16 2.09 2.02 1.94 1.84

17 25 SHC 2.44 2.37 2.30 2.22 2.11

27 SHC 2.72 2.65 2.58 2.49 2.39
29 SHC 3.01 2.93 2.86 2.77 2.66
31 SHC 3.29 3.20 3.10 2.91 2.68

TC 3.59 3.47 3.30 3.10 2.86

CM 1.22 1.29 1.38 1.51 1.64
21 SHC 1.57 1.52 1.45 1.36 1.26
23 SHC 1.85 1.80 1.73 1.64 1.54

19 25 SHC 2.12 2.07 2.00 1.92 1.82

27 SHC 2.39 2.35 2.28 2.20 2.09
29 SHC 2.65 2.63 2.55 2.48 2.37
31 SHC 2.93 2.91 2.83 2.75 2.65

TC 3.80 3.67 3.50 3.29 3.03

CM 1.25 1.32 1.42 1.56 1.69
23 SHC 1.55 1.50 1.43 1.34 1.24

21 25 SHC 1.82 1.77 1.71 1.62 1.52

27 SHC 2.09 2.05 1.98 1.90 1.79
29 SHC 2.36 2.32 2.26 2.17 2.07
31 SHC 2.63 2.60 2.53 2.45 2.35

TC 4.06 3.89 3.67 3.44 3.20

CM 1.27 1.35 1.46 1.59 1.73

23 25 SHC 1.52 1.46 1.38 1.29 1.21

27 SHC 1.78 1.73 1.65 1.56 1.48
29 SHC 2.05 2.01 1.93 1.84 1.76
31 SHC 2.34 2.29 2.20 2.12 2.04

TC: TOTAL COOLING CAPACITY kW
SHC: SENSIBLE HEAT CAPACITY kW
CM: COMPRESSOR INPUT kW
RATING CONDITIONS

OUTDOOR AMBIENT TEMPERATURE 35°C D.B.
INDOOR UNIT ENTERING AIR TEMP. 27°C D.B./19°C W.B.

Indoor Unit AWR512CL
Outdoor Unit AER512SCLA

230V Single Phase 50Hz

32

RATING CAPACITY 3.3 kW
AIR FLOW RATE 700 m³/h

EVAPORATOR CONDENSER
ENT.TEMP. °C OUTDOOR AMBIENT TEMP. °C

W.B. D.B. 25 30 35 40 43

TC 3.13 3.03 2.89 2.71 2.50

CM 1.14 1.21 1.30 1.43 1.56
21 SHC 2.14 2.10 2.03 1.94 1.84
23 SHC 2.43 2.38 2.31 2.22 2.12

15 25 SHC 2.71 2.65 2.58 2.50 2.40

27 SHC 2.99 2.93 2.86 2.71 2.50
29 SHC 3.13 3.03 2.89 2.71 2.50
31 SHC 3.13 3.03 2.89 2.71 2.50

TC 3.39 3.26 3.10 2.91 2.68

CM 1.16 1.25 1.34 1.47 1.60
21 SHC 1.88 1.82 1.75 1.66 1.56
23 SHC 2.16 2.09 2.02 1.94 1.84

17 25 SHC 2.44 2.37 2.30 2.22 2.11

27 SHC 2.72 2.65 2.58 2.49 2.39
29 SHC 3.01 2.93 2.86 2.77 2.66
31 SHC 3.29 3.20 3.10 2.91 2.68

TC 3.59 3.47 3.30 3.10 2.86

CM 1.22 1.29 1.38 1.51 1.64
21 SHC 1.57 1.52 1.45 1.36 1.26
23 SHC 1.85 1.80 1.73 1.64 1.54

19 25 SHC 2.12 2.07 2.00 1.92 1.82

27 SHC 2.39 2.35 2.28 2.20 2.09
29 SHC 2.65 2.63 2.55 2.48 2.37
31 SHC 2.93 2.91 2.83 2.75 2.65

TC 3.80 3.67 3.50 3.29 3.03

CM 1.25 1.32 1.42 1.56 1.69
23 SHC 1.55 1.50 1.43 1.34 1.24

21 25 SHC 1.82 1.77 1.71 1.62 1.52

27 SHC 2.09 2.05 1.98 1.90 1.79
29 SHC 2.36 2.32 2.26 2.17 2.07
31 SHC 2.63 2.60 2.53 2.45 2.35

TC 4.06 3.89 3.67 3.44 3.20

CM 1.27 1.35 1.46 1.59 1.73

23 25 SHC 1.52 1.46 1.38 1.29 1.21

27 SHC 1.78 1.73 1.65 1.56 1.48
29 SHC 2.05 2.01 1.93 1.84 1.76
31 SHC 2.34 2.29 2.20 2.12 2.04

TC: TOTAL COOLING CAPACITY kW
SHC: SENSIBLE HEAT CAPACITY kW
CM: COMPRESSOR INPUT kW
RATING CONDITIONS

OUTDOOR AMBIENT TEMPERATURE 35°C D.B.
INDOOR UNIT ENTERING AIR TEMP. 27°C D.B./19°C W.B.

Indoor Unit FCR512CL
Outdoor Unit AER512SCLA

33

34

6. ELECTRICAL DATA

6-1. Electrical Characteristics

Indoor Unit Outdoor Unit Complete Unit

Fan Motor Fan Motor Compressor

Performance at 230V 1-phase 50Hz
Rating Conditions

Running Amps. A 0.13 0.28 6.09 6.5
Power Input kW 0.031 0.062 1.287 1.38

Full Load Conditions

Running Amps. A0.13 0.28 7.09 7.5
Power Input

kW 0.031 0.062 1.507 1.60

Rating Conditions : Indoor Air Temperature 27°C D.B. / 19°C W.B.

Outdoor Air Temperature 35°C D.B.

Full Load Conditions : Indoor Air Temperature 32°C D.B. / 23° C W.B.

Outdoor Air Temperature 43°C D.B.

Indoor Unit AWR512CL
Outdoor Unit AER512SCLA

Indoor Unit Outdoor Unit Complete Unit

Fan Motor Fan Motor Compressor

Performance at 230V 1-phase 50Hz
Rating Conditions Running Amps. A 0.12 0.24 4.04 4.4

Power Input kW 0.027 0.055 0.858 0.94

Full Load Conditions Running Amps. A 0.12 0.24 4.54 4.9

Power Input

kW 0.027 0.055 0.998 1.08

Rating Conditions : Indoor Air Temperature 27°C D.B. / 19° C W.B.

Outdoor Air Temperature 35°C D.B.

Full Load Conditions

: Indoor Air Temperature 32°C D.B. / 23°C W.B.
Outdoor Air Temperature 43°C D.B.

Indoor Unit AWR509CL
Outdoor Unit AER509SCLA

Indoor Unit Outdoor Unit Complete Unit

Fan Motor Fan Motor Compressor

Performance at 230V 1-phase 50Hz
Rating Conditions Running Amps. A 0.11 0.24 2.85 3.2

Power Input kW 0.025 0.055 0.6 0.68

Full Load Conditions Running Amps. A 0.11 0.24 3.15 3.5

Power Input kW 0.025 0.055 0.681 0.76

Rating Conditions : Indoor Air Temperature 27°C D.B. / 19° C W.B.

Outdoor Air Temperature 35°C D.B.

Full Load Conditions : Indoor Air Temperature 32°C D.B. / 23°C W.B.

Outdoor Air Temperature 43

°C D.B.

Indoor Unit AWR508CL
Outdoor Unit AER508SCLA

Indoor Unit Outdoor Unit Complete Unit

Fan Motor Fan Motor Compressor
Performance at 230V ~ 50Hz
Rating Conditions Running Amps. A 0.12 0.24 4.04 4.4

Power Input kW 0.027 0.055 0.858 0.94

Full Load Conditions Running Amps. A 0.12 0.24 4.54 4.9

Power Input kW 0.027 0.055 0.998 1.08

Rating Conditions : Indoor Air Temperature 27°C D.B. / 19°C W.B.

Outdoor Air Temperature 35°C D.B.

Full Load Conditions : Indoor Air Temperature 32°C D.B. / 23°C W.B.

Outdoor Air Temperature 43°C D.B.

Indoor Unit AFR509CL
Outdoor Unit AER509SCLA

Indoor Unit Outdoor Unit Complete Unit

Fan Motor Fan Motor Compressor
Performance at 230V ~ 50Hz
Rating Conditions Running Amps. A 0.29 0.31 5.9 6.5

Power Input kW 0.070 0.07 1.20 1.38

Full Load Conditions Running Amps. A 0.29 0.31 6.7 7.3

Power Input kW 0.070 0.07 1.47 1.61

Rating Conditions : Indoor Air Temperature 27°C D.B. / 19°C W.B.

Outdoor Air Temperature 35°C D.B.

Full Load Conditions : Indoor Air Temperature 32°C D.B. / 23°C W.B.

Outdoor Air Temperature 43°C D.B.

Indoor Unit FCR512CL
Outdoor Unit AER512SCLA

35

6-2. Electric Wiring Diagrams

AWR508CL
AWR509CL
AWR512CL

Indoor Unit

To avoid electrical shock hazard, be sure to
disconnect power before checking, servicing
and/or cleaning any electrical parts.

WARNING

36

37

To avoid electrical shock hazard, be sure to
disconnect power before checking, servicing
and/or cleaning any electrical parts.

WARNING

Indoor Unit FCR512CL

.

To avoid electrical shock hazard, be sure to
disconnect power before checking, servicing
and/or cleaning any electrical parts.

WARNING

Outdoor Unit

AER508SCLA

AER509SCLA

AER512SCLA

Outdoor Unit

38

39

7. INSTALLATION INSTRUCTIONS

7-1. Installation Site Selection

To prevent abnormal heat
generation and the possibility
of fire, don’t place obstacles,
enclosures and grills in front
of or surrounding the air
conditioner in a way that may
block air flow.

AVOID:

●

direct sunlight.

●

nearby heat sources that may affect performance of
the unit.

●

areas where leakage of flammable gas may be
expected.

●

places where large amounts of oil mist exist.

DO:

●

select an appropriate position from which every
corner of the room can be uniformly air-conditioned.
(High on a wall is best)

●

select a location that will hold the weight of the unit.

●

select a location where tubing and drain pipe have the
shortest run to the outside.

●

allow room for operation and maintenance as well as
unrestricted air flow around the unit. (Fig. 1)

●

install the unit within the maximum elevation
difference (H) above or below the outdoor unit and
within a total tubing length (L) from the outdoor unit as
detailed Table 1 and Fig. 2a.

Indoor Unit

,







15 cm

min.

15 cm
min.

15 cm min.

INDOOR UNIT

Front View

INDOOR
UNIT

Tubing length (L)

OUTDOOR
UNIT

Elevation
difference (H)

Fig. 2

Fig. 2a

Fig.1

WARNING

Table 1

* If total tubing length becomes a)7.5 to 15 m , b)7.5 to 20 m (max.), charge additional refrigerant (R 407c) by

a)15 g/m or b)25 g /m.
No additional charge of compressor oil is necessary.

Model

Max. Allowable

Tubing Length at

Shipment (m)

Limit of Tubing

Length (L)

(m)

Limit of Elevation

Difference (H)

(m)

Required Amount of

Additional Refrigerant

(g/m)*

AWR508 - AWR509 15

Minimum height
from floor level

1.5m

Indoor Unit

Wall

Floor level

For stable operation of
the air conditioner, do
not install wall-mounted
type indoor units under

1.5m from floor level.

CAUTION

7.5 7 a) 15

AWR512 7.5 20 7 b) 25

Fig 2b < Only for AWR >

40

AVOID:

●

heat sources, exhaust fans, etc. (Fig. 3)

●

damp, humid or uneven locations.

DO:

●

choose a place as cool as possible.

●

choose a place that is well ventilated.

●

allow enough room around the unit for air
intake/exhaust and possible maintenance.
(Figs. 4b and 4c)

●

provide a solid base (concrete block, 10 ✕40 cm
beams or equal), a minimum of 10 cm above ground
level to reduce humidity and protect the unit against
possible water damage and decreased service life.
(Fig.5b)

●

use lug bolts or equal to bolt down unit, reducing
vibration and noise.

Outdoor Unit

Outdoor unit

Hot air

Heat source

Exhaust fan

Fig. 3

NO

Fig. 3

Air intake

Min. 10 cm

Air discharge

Min.

5 cm

Min.
40 cm

Valve
side
Min. 25 cm

Top View

Air intake

Concrete
or equal

About 10 cm

Min. 10 cm

Anchor bolts
(4 pcs.)

About 40 cm

2 m

2 m

Ground

Obstacle

Obstacle above

Air discharge

Side View

Fig. 4c

Required space around the unit.

Top View

Fig. 4b

Fig. 5b

41

7-2. Remote Control Unit Installation

Position

The remote control unit can be operated from either a
non-fixed position or a wall-mounted position.

To ensure that the air conditioner operates correctly, do
not install the remote control unit in the following places:

●

In direct sunlight

●

Behind a curtain or other place where it is covered

●

More than 8 m away from the air conditioner

●

In the path of the air conditioner's airstream

●

Where it may become extremely hot or cold

●

Where it may be subject to electrical or magnetic
interference

Mounting on a Wall

a) Removable mounting

1) Momentarily hold the remote control unit at the
desired mounting position.

2) Confirm that the air conditioner responds
correctly when you press keys on the remote
control from that position.

3) After confirming correct operation, use a
screwdriver to screw the supplied special
mounting screw into the wall. (Fig.7a)

4) Hang the remote control unit from the mounting
screw.

b) Non-removable mounting

1) Momentarily hold the remote control unit at the
desired mounting position.

2) Confirm that the air conditioner responds
correctly when you press keys on the remote
control from that position.

3) After confirming correct operation, use a
screwdriver to screw the supplied special
mounting screw into the wall. (Fig.7a)

4) Remove the remote control cover by sliding it
downward.

5) Remove the batteries of the remote control unit.

6) Use a screwdriver to screw the remote control
unit securing screw into the wall through the hole
in the battery compartment. (Fig.7b)

7) Replace the batteries.

8) Again confirm that the remote control unit
operates correctly.

Wall

Special
mounting
screw

Screw

Wall

Fig.7b

Fig.7a

Removable mounting

Non-removable mounting

42

(A) Power Supply Wiring Length (m) (B) Power Line (m)

2.5 mm

2

Regulations on wiring diameter differ from locality to
locality. For field wiring requirements, please refer to
your local electrical codes. Carefully observe these
regulations when carrying out the installation.

Table 6 lists recommended wire lengths and cross
section area for power supply systems.

Refer to the WIRING SYSTEM DIAGRAM for the
meaning of "A" and "B" in Table 6.

NOTE

Table 6

●

Be sure to comply with
local codes on running the
wire from the indoor unit to
the outdoor unit (size of
wire and wiring method,
etc.).

●

Each wire must be firmly
connected.

●

No wire should be allowed
to touch refrigerant tubing,
the compressor, or any
moving part.

To avoid the risk of electric
shock, each air conditioner
unit must be grounded.

●

Be sure to connect the
power supply line to the
indoor unit as shown in the
wiring diagram. The
outdoor unit draws its
power from the indoor unit.

WARNING

WARNING

CAUTION

WIRING SYSTEM DIAGRAM

Outdoor

unit

Indoor

unit

L

N

1
2

4

1
2

4

Power supply

220 – 240 V 50Hz

A

B

Ground

7-3. Recommended Wire Length and Diameter

Fuse or Circuit

Breaker Capacity

2.5 mm

2

AER508 57

20 10AAER509 21

AER512 14

Cross Sectional

Area (mm2)

Model

8. FUNCTION

8-1. Room Temperature Control

●

Room temperature control is obtained by cycling the compressor ON and OFF under control of the room
temperature sensor in the remote control unit.

●

The room temperature (and other information) is transmitted every 3 minutes by the remote control unit to the
controller in the indoor unit.

●

The control circuit will not attempt to turn the compressor ON until the compressor has been OFF for at least
3 minutes. To protect the compressor from stalling out when trying to start against the high side refrigerant
pressure, the control circuit has a built-in automatic time delay to allow the internal pressure to equalize.

●

As a protective measure, the control circuit switches the compressor OFF after 5 minutes or more of compressor
operation.

●

Thermo. ON : When the room temperature is above T + 1°C (T°C is set temperature).

Compressor ➞ON

●

Thermo. OFF : When the room temperature is equal to or below set temperature T°C.

Compressor ➞OFF

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

3 minutes5 minutes

ON OFF ON OFF ON OFFCompressor

ON OFF ON OFF ON OFF

More than
5 minutes

Outdoor fan

Indoor fan

Set speed

T+1 °C

T °Cset temp.

Thermo.
OFF

Thermo.
OFF

Thermo.
ON

Thermo.
OFF

Thermo.
ON

Thermo.
ON

Thermo.
ON

Room temp.

Signal from remote control unit

43

8-2. 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.

● Intermittent ventilation occurs by switching the indoor fan speed between L ↔ LL.

● Dry operation does not occur when the room temperature is under 15°C, which is the monitor zone.

● When the compressor stops, the indoor fan stops as well.

NOTE

Room temp.

Cooling operation

T+2 °C

Set temp. T °C

T–1 °C

Monitor zone
Both the indoor and outdoor units stop.

Room temp. 15 °C

*Dry A zone

Compressor :
FMI (indoor fan) :

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

only while the compressor is ON.

*Dry B zone

Compressor :
FMI (indoor fan) :

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.

44

8-3. Freeze Prevention

●

This function prevents freezing of the indoor heat exchange coil.

●

When the compressor has been running for 10 minutes

*1)

or more and the temperature of the indoor heat
exchange coil falls below –1°C, the control circuit stops the compressor for at least 6 minutes. The compressor
does not start again until the temperature rises above 8°C or 6 minutes has elapsed.

*1)Functionally, compressor running period, or time are of two types, 10 minutes and 6 minutes depending upon

production date.

NOTE

ON ON ON ON

OFFOFF

Set speed

More than

10 minutes

6 minutes

T+1 °C

Indoor heat exch.
coil temp.

–1 °C

Compressor

Indoor fan

Room temp.

Thermo. OFF

Thermo. ON

Set temp. T °C

More than

10 minutes

More than

6 minutes

Set speed

*1) *1)

45

8-4. Outdoor Fan Speed Control (for model AER512SCLA)

Low ambient fan speed control

●This function protects the compressor from being damaged due to flowback of the liquid refrigerant to the

compressor when the outdoor temperature is very low.

●When the air temp. thermistor (TH) on the outdoor unit detects a change in temperature, the controller (POW-

CL128E) on the electrical component box activates to control the fan speed automatically.

●If the outdoor temperature falls below 14°C, the fan speed switches to MED.

●If the outdoor temperature falls below –1°C, the fan speed switches to LOW.

46

Outdoor

temperature

14°C

–1°C

Fan speed Fan motor output

HIGH

MEDIUM

LOW

7 1 (YEL-BRN

)

3 1 (WHT-BRN

)

5 1 (VLT-BRN)

(Line voltage 220-240V)

✽1 ✽2

✽1. Regardless of outdoor temperature, outdoor fan motor operates at first at HIGH speed for

23 ± 5 seconds to give the motor an initial boost.

✽2. When the fan speed switches, the controller terminal's location where line voltage comes

out (

❍ – ❍ ) shifts accordingly.

NOTE

9. REFRIGERANT R407C :
SPECIAL PRECAUTIONS WHEN SERVICING UNIT

9-1. Characteristics of new refrigerant R407C

9-1-1.What is new refrigerant R407C

R407C is a new refrigerant that contains three types of non-azeotropy-type mixed refrigerant which does
not adversely affect the Earth's ozone layer. Its refrigeration capacity and energy efficiency are about the
same level as the conventional refrigerant R22

9-1-2.Components (mixing proportions)

HFC32 (23%) / HFC125 (25%) / HFC134a (52%)

9-1-3.Characteristics

● Less toxic, more chemically stable refrigerant.

●

Composition of refrigerant R407C changes whether it is in 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.

Therefore, do not add new refrigerant.

Instead, recover the
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 (liquid phase).

●

When refrigerant R407C 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 the liquid phase.

● Ether-type oil is used for the compressor oil for R407C-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.

9-2. Checklist before servicing

●

Tubing precautions

Refrigerant R407C is more easily affected by dust or moisture compared with R22, thus be sure to temporarily
cover the ends of the tubing with caps or tape prior to installation.

●

No addition of compressor oil for R407C

No additional charge of compressor oil is permitted.

●

No use of refrigerant other than R407C

Never use a refrigerant other than R407C.

●

If refrigerant R407C is exposed to fire

Through welding, etc., toxic gas may be released when R407C refrigerant is exposed to fire. Therefore, be sure
to provide ample ventilation during installation work.

●

Caution in case of R407C leak

Check for possible leak points with the special leak detector for R407C. If a leak occurs inside the room,
immediately provide thorough ventilation.

CAUTION

47

9-3. Tools specifically for R407C

●

For servicing, use the following tools for R407C

●

The above tools specifically for R407C must not be used for R22. 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 R407C and never alternately with R22.

9-4. For tubing installation procedures

●

When the tubes are connected,

always apply HAB oil on the flare portions to improve the sealing of

tubing.

The following is the HAB oil generally used:

Esso: ZERICE S32

For details on tubing installation procedures, refer to the installation manuals attached to the indoor
unit and outdoor unit.

48

Tool Distinction Tool Name

• Gauge manifold

• Charging hose

• Gas leak detector

• Refrigerant cylinder

• Charging cylinder

Tools specifically for R407C • Refrigerant recovery unit

• 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

Tools which can be commonly • Torque wrench
used for R22 and R407C • Cutter, Reamer

• Welding machine, nitrogen gas cylinder

CAUTION

NOTE

9-5. In case of compressor malfunction

●

Should the compressor malfunction, be sure to replace compressor as quickly as

possible.

●

Use only the tools indicated exclusively for R407C. ➞ See "10-3. Tools specifically

for R407C".

9-5-1.Procedure for replacing compressor

(1) Recovering refrigerant

• Any remaining refrigerant inside the unit should not be
released to the atmosphere, but recovered using the
refrigerant recovery unit for R407C.

• Do not reuse the recovered refrigerant, since will
contain impurities.

(2) Replacing compressor

• Soon after removing pinched pipes of both discharge
and suction tubes of the new compressor, replace it
quickly.

(3) Checking for sealing

• Use nitrogen gas for the pressurized gas, and never
use a refrigerant other than R407C. Also do not use
oxygen or any flammable gas.

(4) Evacuation

•

Use a solenoid valve-installed vacuum pump

so
that even if power is cut off in the middle of evacuation
of air due to a power interruption, the valve will
prevent the pump oil from flowing back.

• The equipment may be damaged if moisture remains
in the tubing, thus carry out the evacuation thoroughly.

• When using a vacuum pump with exhaust air volume
more than 25L/min. and ultimate vacuum pressure
rate of 0.05Torr:

49

CAUTION

(1). Recovering refrigerant

OK

(2). Replacing compressor

OK

(3). Checking for sealing

OK

(4). Evacuation

OK

(5). Recharging

Standard time of evacuation

Length of tubing Less than 10 m More than 10 m

Time More than 10 min. More than 15 min.

Valve

Valve

Single valve

Charge the liquid refrigerant
with the cylinder in the
up-side-down position.

Single valve (with siphon tube)

Charge with the cylinder in the
normal position.

Liquid

Liquid

50

Configurations and characteristics of cylinders

Charging

cylinder

Open

Refrigerant

cylinder

Liquid

NO!

Fig. 2

Fig. 1

Fig.3

(5) Recharging

•

Be sure to charge the specified amount of
refrigerant in liquid state

using the service port of
wide tube service valve. The proper amount is listed
on the unit's nameplate.

When the entire amount cannot be charged all at
once, charge gradually while operating the unit in
Cooling Operation.

●

Never charge a large amount
of liquid refrigerant at once
to the unit. This may cause
damage to the compressor.

• When charged with a refrigerant cylinder, use the
electronic scale for charging refrigerant. In this case, if
the volume of refrigerant in the cylinder becomes less
than 20% of the fully-charged amount, the composition
of the refrigerant starts to change. Thus,

do not use
the refrigerant if the amount in the refrigerant
cylinder is less than 20%.

Also, charge the minimum necessary amount to the
cylinder before using it for charging the air
conditioning unit.

Example:

In case of charging refrigerant to a unit requiring

0.76Kg using a capacity of 10Kg-cylinder, the
minimum necessary amount for the cylinder is:

0.76 + 10 x 0.20 = 2.76Kg

For the remaining refrigerant, refer to the
instructions of the refrigerant manufacturer.

• If using a charging cylinder, transfer the specified
amount of liquid refrigerant from the refrigerant
cylinder to the charging cylinder.

Prepare an evacuated charging cylinder beforehand.

●

To prevent the composition

of R407C from changing,
never bleed the refrigerant
gas into the atmosphere
while transferring the
refrigerant. (Fig. 3)

Do not use the refrigerant if the amount in the
charging cylinder is less than 20%.

CAUTION

CAUTION

9-6. In case refrigerant is leaking

●

Never attempt to charge additional refrigerant when refrigerant has been leaking

from the unit. Follow the procedure described below to locate points of leaks and
carry out repairs, then recharge the refrigerant.

(1) Detecting Leaks

• Use the detector for R407C to locate refrigerant leak
points.

(2) Recovering refrigerant

• Never release the gas to the atmosphere, recover
residual refrigerant using the refrigerant recovery unit
for R407C, instead.

• Do not reuse the recovered refrigerant because its
composition will have been altered.

(3) Welding leaking points

• Confirm again that no residual refrigerant exists in the
unit before starting welding.

• Weld securely using flux and wax for R407C.

• Prevent oxide film from forming inside the tubes
utilizing substitution with nitrogen (N2) in the
refrigerant circuit of the unit. Leave ends of tubes open
during welding.

(4) Checking for sealing

• Use nitrogen gas for the pressurized gas, and never
use a refrigerant other than R407C. Also do not use
oxygen or any flammable gas.

(5) Evacuation

•

Use a solenoid valve-installed vacuum pump

so
that even if power is cut off in the middle of evacuation
of air due to a power interruption, the valve will prevent
the pump oil from flowing back.

• The equipment may be damaged if moisture remains
in the tubing, thus carry out the evacuation thoroughly.

• When using a vacuum pump with exhaust air volume
more than 25L/min. and ultimate vacuum pressure rate
of 0.05Torr:

51

(2). Recovering refrigerant

OK

(3). Welding leaking points

OK

(4). Checking for sealing

OK

(5). Evacuation

OK

(6). Recharging

(1). Detecting leaks

OK

CAUTION

Standard time of evacuation

Length of tubing Less than 10 m More than 10 m

Time More than 10 min. More than 15 min.

(6) Recharging

•

Be sure to charge the specified amount of
refrigerant in liquid state

using the service port of
wide tube service valve. The proper amount is listed
on the unit's nameplate.

When the entire amount cannot be charged all at
once, charge gradually while operating the unit in
Cooling Operation.

●

Never charge a large amount

of liquid refrigerant at once
to the unit. This may cause
damage to the compressor.

• When charged with a refrigerant cylinder, use the
electronic scale for charging refrigerant. In this case, if
the volume of refrigerant in the cylinder becomes less
than 20% of the fully-charged amount, the composition
of the refrigerant starts to change. Thus,

do not use
the refrigerant if the amount in the refrigerant
cylinder is less than 20%.

Also, charge the minimum necessary amount to the

cylinder before using it for charging the air
conditioning unit.

Example:

In case of charging refrigerant to a unit requiring

0.76Kg using a capacity of 10Kg-cylinder, the
minimum necessary amount for the cylinder is:

0.76 + 10 x 0.20 = 2.76Kg

For the remaining refrigerant, refer to the instructions
of the refrigerant manufacturer.

• If using a charging cylinder, transfer the specified
amount of liquid refrigerant from the refrigerant
cylinder to the charging cylinder.

Prepare an evacuated charging cylinder beforehand.

●

To prevent the composition

of R407C from changing,
never bleed the refrigerant
gas into the atmosphere
while transferring the
refrigerant. (Fig. 6)

Do not use the refrigerant if the amount in the
charging cylinder is less than 20%.

52

CAUTION

CAUTION

Valve

Valve

Single valve

Charge the liquid refrigerant
with the cylinder in the
up-side-down position.

Single valve (with siphon tube)

Charge with the cylinder in the
normal position.

Liquid

Liquid

Fig. 4

Fig. 5

Configurations and characteristics of cylinders

Charging

cylinder

Open

Refrigerant

cylinder

Liquid

NO!

Fig. 6

9-7. Charging additional refrigerant

9-7-1.When tubes are extended

• Observe the proper amount of refrigerant as stated in this service manual or the installation manual that came
with the indoor unit.

Charge additional refrigerant in liquid state.

●

Never charge additional refrigerant if refrigerant is leaking from the unit. Follow

instructions given in "10-6. In case refrigerant is leaking" and completely carry out
repairs. Only then should you recharge the refrigerant.

9-8. Retro-fitting existing systems

9-8-1 Use of existing units

•

Never use new refrigerant R407C for existing units which use R22.

This will cause the air conditioner to

operate improperly and may result in a hazardous condition.

9-8-2 Use of existing tubing

• If replacing an older unit that used refrigerant R22 with a R407C unit,

do not use its existing tubing

. Instead,

completely new tubing must be used.

53

CAUTION

10. TROUBLESHOOTING

10-1. Check before and after troubleshooting

10-1-1. Check power supply wiring.

●

Check that power supply wires are correctly connected to terminals L and N on the terminal plate in the indoor
unit.

10-1-2. Check inter-unit wiring.

●

Check that inter-unit wiring is correctly connected to the outdoor unit from the indoor unit.

10-1-3. Check power supply.

●

Check that voltage is in specified range (±10% of the rating).

●

Check that power is being supplied.

10-1-4. Check lead wires and connectors in indoor and outdoor units.

●

Check that coating of lead wires is not damaged.

●

Check that lead wires and connectors are firmly connected.

●

Check that wiring is correct.

Outdoor

unit

Indoor

unit

Power supply :
Single phase
220–240V ~ 50Hz

Ground

Ground

Inter–unit
power wiring

Power plug
(Local supply)

L

1
2

4

1
2

4

N

54

WARNING

Hazardous voltage can cause ELECTRIC SHOCK or
DEATH. Disconnect power or turn off circuit breaker
before you start checking or servicing.

10-2. Air conditioner does not operate.

10-2-1. Circuit breaker trips (or fuse blows).

A. When the circuit breaker is set to ON, it is tripped soon. (Resetting is not possible.)

●

There is a possibility of ground fault.

●

Check insulation resistance.

If resistance value is 2MΩ or less, insulation is defective (“NO”).

NO

Measure insulation
resistance of electrical
parts in outdoor unit.

NO

Set circuit breaker to OFF.

*

Measure insulation
resistance of electrical
parts in indoor unit.

1

Remove inter-unit wires from
terminal plate in outdoor unit.

Measure insulation resistance
of outdoor unit.

•

2

Remove inter-unit wires from
terminal plate in indoor unit.
Then, pull the power plug out of
the wall outlet

Measure insulation resistance
of indoor unit.

•

•

•

Insulation of
outdoor unit
is defective.

Insulation of
indoor unit
is defective.

WARNING

11
22

44

Outdoor

unit

1

Indoor

unit

22

Inter–unit
wiring

Circuit
breaker

Ground

Ground

Power plug
(Local supply)

Wall outlet
(receptacle)

Single phase
220–240V ~ 50Hz

L

N

55

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

●

There is a possibility of short circuit.

10-2-2. Neither indoor nor outdoor unit runs.

A. Power is not supplied.

B. Check "OPERATION selector" switch in the indoor unit.

C. Check transformer in indoor unit.

•

Measure resistance of primary and
secondary winding.
(TR1)

YES

NO

•

OPERATION selector switch is set
in ON position.

Set OPERATION selector switch
to ON.

Indoor PCB Ass'y is defective.

NO

•

Check power supply.
Power is being supplied to the

indoor unit.

Circuit breaker
is tripped.

Power failure

Reset breaker.

Wait for recovery
or contact power
company.

Replace with suitable
one (larger capacity).

•

•

•

NO

Check capacity of circuit breaker.
Capacity of circuit breaker is

suitable.

Measure resistance of outdoor fan
motor winding.

Measure resistance of compressor
motor winding.

56

D. Check remote control unit.

E. Check fuse on the indoor PCB Ass'y.

F. Check TIMER on the remote control unit.

•

Timer is turned ON. Check to see
if or is displayed on
remote control

YES

Cancel the timer mode.

ON

OK

OK

•

Check fuse on indoor PCB Ass'y
for continuity. (F)

•

Check operation lamp to see
if light is ON.

Light is OFF

•

Measure resistance of primary and
secondary winding of transformer.
(TR)

•

Indoor PCB Ass'y is defective.

OK

OK

•

Measure resistance of indoor and/or
outdoor fan motor winding.
(FM)

•

Measure resistance of compressor
motor winding. (CM)

OK

•

Measure coil resistance of power
relay in outdoor unit.
(PR)

•

Replace the fuse.

If fuse has been blown,

OK

•

Try to run with another remote
control unit.

First remote control unit is defective.

•

Check for residue buildup on
transmitter of remote control unit.

•

Check for residue buildup on remote
control receiver on front of indoor
unit.

Clean transmitter.

Clean receiver.

57

10-2-3. Only outdoor unit does not run.

A. Check setting temperature.

B. Check power relay in outdoor unit.

OK

•

Measure coil resistance of power
relay.

Check indoor PCB Ass'y.

(PR)

OK

NO

Is room temperature too low ?

Try to lower setting temperature by
temperature setting button ( button).

Outdoor unit still does
not run.

Remote control unit is defective.

•

Try to run using another remote
control unit.

58

10-3. Some part of air conditioner does not operate.

10-3-1. Only indoor fan does not run.

10-3-2. Only outdoor fan does not run.

Fan cannot
be turned.

OK

•

Check fan rotation.
Turn fan gently once or twice by
hand.

•

Check fan casing
foreign matter on
inside.

Fan motor burnout
or foreign matter in
bearings.

Remove foreign
matter or repair.

Repair or replace.

•

Measure resistance of outdoor fan
motor winding.

•

Check fan motor capacitor.

Fan cannot
be turned.

OK

•

Check fan rotation.
Turn fan gently once or twice by
hand.

•

Check fan casing
foreign matter on
inside.

Fan motor burnout
or foreign matter in
bearings.

Remove foreign
matter or repair.

Repair or replace.

•

Measure resistance of indoor fan
motor winding.

•

Check fan motor capacitor.

59

10-3-3. Only compressor does not run.

10-3-4. Only flap motor does not run.

•

Measure resistance of flap motor
winding.

•

Check compressor motor
capacitor.

•

Measure resistance of
compressor motor winding.

•

Measure resistance of power
relay. (PR)

NO

YES

YES

Overload relay is working.

(Either OLR T or OLR A)

YES

Temperature of compressor
is abnormally high.

Refrigerant gas shortage. Charge refrigerant gas (R407c).

Rotor may be locked up.

(C1)

•

Measure Power supply
voltage.
The voltage is too low.

No

60

10-4. Air conditioner operates, but abnormalities are observed.

10-4-1. Poor cooling.

10-4-2. Excessive cooling.

NO

NO

•

Set temperature is suitable.

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

•

Remote control unit is placed where
it can detect room temperature
properly.

Change position of remote
control unit.

Air filter is clogged.

NO

YES

Temperature
difference
is small.

YES

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

Possibility of
gas shortage.

YES

•

Check position of remote control unit.
Cool air from air conditioner reaches
position directly.

•

Change position of remote
control unit.

•

Wide and narrow tubes between
indoor unit and outdoor unit are
insulated.

Insulate both wide and narrow
tubes separately and then
tape together.

•

Measure temperature of suction and
discharge air of air conditioner.

Charge refrigerant
gas (R407c).

Check for clogging of air filter.

•

Fan speed is set to LOW.

Clean filter.

Set fan speed to either
HIGH or MEDIUM.

•

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

Reduce cooling load or
replace the air conditioner
with larger capacity.

61

10-5. If a sensor is defective.

10-5-1. Indoor coil temp. thermistor (TH1) is defective.

Alarm Signal (*)

Operation lamp on the front side of the indoor unit will flash on and off when the indoor coil thermistor is defective.
At the same time the outdoor unit will stop. Indoor unit will operate only for ventilation.

10-5-2. Room temp. thermistor (TH2) is defective.

A. Open

When thermistor opens, the air conditioner will be in the following conditions as the controller tries to detect
extremely low room temperature.
In Cooling mode: The air conditioner soon stops and will not start again. (Thermo.OFF) Neither outdoor fan

nor compressor runs.

B. Short

When thermistor is short, the air conditioner will be in the following conditions as
the controller tries to detect extremely high room temperature.
In Cooling mode: The air conditioner continues to operate (Thermo.ON). Both

the outdoor fan and compressor do not stop. As a result, the
room becomes too cold.

Definition of Open or Short Circuit of Sensor (Thermistor)

Open ... A lead wire is broken or disconnected or the circuit inside the temperature sensor is open .
Short ... The protective cover of a lead wire has been damaged, and the exposed wire is touching another metal

part, or both lead wires have become exposed and are touching each other. Alternatively, the circuit
inside the temperature sensor is closed.

NOTE

Temperature
sensor

Lead
wires

Thermistor Structure

NOTE

•

Operation lamp on front side of
indoor unit is flashing on and off. (*)

YES

•

Replace thermistor.

•

Thermistor (TH1 ) is defective.

YES

62

63

11-1. Measurement of Insulation

Resistance

●

The insulation is in good condition if the resistance
exceeds 2MΩ.

11-1-1.Power Supply Wires

Clamp the grounding terminal of the power plug with a
lead clip of the insulation resistance tester and
measure the resistance by placing a probe on either of
the two power terminals. (Fig. 1)

Then, also measure the resistance between the
grounding and other power terminals. (Fig. 1)

11-1-2.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 each
terminal screw where power supply lines are
connected on the terminal plate. (Fig. 2)

11-1-3.Outdoor 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 each
terminal screw on the terminal plate. (Fig. 2)
Note that the ground line terminal should be skipped
for the check.

11-1-4.Measurement of Insulation

Resistance for Electrical Parts

Disconnect the lead wires of the desired electric part
from terminal plate, capacitor, etc. Similarly disconnect
the connector. Then measure the insulation resistance.
(Figs. 3 and 4)

Refer to Electric Wiring Diagram.
If the probe cannot enter the poles because the hole is

too narrow then use a probe with a thinner pin.

NOTE

11. CHECKING ELECTRICAL COMPONENTS

Ground

power plug
(Local supply)

probe

Insulation
tester

Terminal plate

Copper
tube or
metallic part

Clip

Insulation
tester

Probe

Copper
tube or
metallic part

Clip

Insulation
tester

Probe

Clip

Insulation
tester

Probe

Metallic
part

From fan motor,
compressor and
other parts

Fig. 1

Fig. 2

Fig. 3

Fig. 4

The shape of the power plug may differ from
that of the air conditioner which you are
servicing.

NOTE

64

11-2. Checking Continuity of Fuse

on PCB Ass'y

●

Remove the PCB Ass’y from the electrical
component box. Then pull out the fuse from the PCB
Ass’y. (Fig. 5)

●

Check for continuity using a multimeter as shown in
Fig. 6.

11-3. Checking Motor Capacitor

Remove the lead wires from the capacitor terminals,
and then place a probe on the capacitor terminals as
shown in Fig. 7. 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.

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

Fuse

PCB Ass’y

Fuse

Compressor motor
capacitor

Fan motor
capacitor

Multimeter

Fig. 5

Fig. 6

Fig. 7

65

12-1. Removing Air Intake Grille

(1) Hold both ends and pull forward to open the

air intake grille. (Fig. 1)

(2) Remove the metal clips connecting the unit and the

grille. First, with a screwdriver, loosen
the * marked screw a little at the right side clip
(DO NOT loosen it too much, otherwise, the screw
and small metal parts will fall off inside.), then press

on the stopper and pull off. (Fig. 2)
(3) Do the same procedure for the left metal clip.
(4) Unlatch the 2 tabs on the lower part of the grille to

take it off completely.

12. DISASSEMBLY PROCEDURE FOR INDOOR UNIT

IMPORTANT! Please Read Before Starting

Safety precautions for servicing the CEILING-MOUNTED indoor unit

Center latch

Air intake grille

Metal clip

*

Air intake
grille

Unit

For Floor Installation

Fig.1

Fig.2

●

Before attempting to replace heavy and bulky parts such as the evaporator and fan motor, disconnect the
indoor unit from the system and place it on the floor. Refer to the steps given below.

●

When checking or servicing the air intake grille, side panels, or electrical component box, first check that
power is completely disconnected. Pay utmost care that your working platform is stable enough. Also, do not
drop any replaced parts and tools on the floor.

66

12-2. Removing Side Panels

(1) Remove the 3 screws attaching the left side panel.

(Fig. 3)
(2) Note the position of the hook on the inside of the

left side panel. To disengage the hook from the slot,

slide down the panel for removal. (Fig. 3)
(3) Do the same procedure for the right side panel.

12-3. Access and Removal of

Electrical Component Box

(1) Remove the front screw with a screwdriver. (Fig. 4)
(2) Slide the lid out and up. (Fig. 4)
(3) Disconnect the wiring as necessary.
(4) Remove the 4 screws, then pull out the electrical

component box. (Fig. 5)

Side panel

Tapping screws
(4 × 10 mm)

Hook

Hook

Slot

Screw

Screw

Electrical component box

Screw

Connectors

Connectors

Hazardous voltage can cause ELECTRIC
SHOCK or DEATH. Disconnect the power
or turn off circuit breaker before you start
checking or servicing.

WARNING

Fig.3

Fig.4

Fig.5

67

12-4. Removing Flap Motor

(1) Remove the 3 screws used to mount the top panel.

(Fig. 6)
(2) While unlatching the 2 tabs inside the back of the

top panel, lift the top panel diagonally in the

direction of the arrow.(Fig. 6)
(3) Remove the 2 screws to pull off the flap motor.

The arm and cam come off together with the motor.

(Fig. 7)

12-5. Removing Evaporator
(=Indoor Heat Exchange Coil)

(1) Remove the 7 screws used to mount the blades.

(Fig. 8)
(2) Lift the blades in the direction of the arrow.(Fig. 8)

Top panel

Flap
motor

Screw

Blade

Arm

Cam

Screw

Flap motor

Screw

Blades

Fig.6

Fig.7

Fig.8

68

(3) Remove the 6 screws of the front panel and pull it

toward you. (Fig. 9)

(4) Remove the 2 screws used to mount the

evaporator. (Fig. 10)
(5) Remove the rubber cap to pull the thermistor out of

the evaporator. (Fig. 10)
(6) Cut the plastic clamp securing the drain hose to the

front fan casing. (Fig. 10)

(7) The evaporator is built into the drain pan. Pull out

the drain pan together with the evaporator in the

direction of the arrow. (Fig. 10)

The foamed polystyrene drain pan is fragile: DO
NOT apply excessive force when removing it.

(8) The evaporator can be removed by sliding it out

from the drain pan in the direction of the arrow.

(Fig. 11)

Front panel

Screw

Plastic clamp

Drain pan

Screw

Rubber cap

Thermistor

Drain hose

Front
fan casing

Drain pan

Evaporator
(Indoor coil)

Mounting
plate

Mounting
plate

Fig.9

Fig.10

Fig.11

IMPORTANT

69

12-6. Removing Fan and Fan Motor

(1) Unlatch the 2 hooks on each side to take off the

front fan casing. (Fig. 12)

(2) Remove the 2 screws attaching the rear fan casing

and then pull the fan casing out.

(3) Insert a hex wrench in the fan boss and turn it

counterclockwise to loosen the centrifugal fan.

The fan can be removed by sliding it to the left.

(Fig. 14)

(4) Remove the 4 bolts to remove the fan motor from

the frame. (Fig. 15)

Hook

Hook

Front fan casing

Rear fan casing

Hex wrench
(3mm or 7/64")

Centrifugal fan

Bolts (M6)

Fan motor

Frame

Fig.12

Fig.13

Fig.14

Fig.15

INSTRUCTION MANUAL

AWR508CL + AER508SCLA
AWR509CL + AER509SCLA
AWR512CL + AER512SCLA

APPENDIX

70

Contents

Page

Features............................................................................................................ 2

Product Information........................................................................................ 3

Alert Symbols.................................................................................................. 3

Installation Location........................................................................................ 4

Electrical Requirements.................................................................................. 4

Safety Instructions .......................................................................................... 4

Names of Parts................................................................................................ 5

Using the Remote Control Unit ................................................................... 10

Operation with the Remote Control Unit ................................................... 12

1. Operation ......................................................................................... 12

2. Adjusting the Fan Speed................................................................ 13

3. Night Setback Mode ...................................................................... 14

Special Remarks ........................................................................................... 15

Setting the Timer........................................................................................... 16

Using the 1-Hour OFF Timer........................................................................ 18

Adjusting the Airflow Direction ................................................................... 19

Operation without the Remote Control Unit.............................................. 20

Care and Cleaning......................................................................................... 20

Troubleshooting ............................................................................................ 23

Tips for Energy Saving ................................................................................ 23

Product Information

If you have problems or questions concerning your Air Conditioner, you
will need the following information. Model and serial numbers are on
the nameplate on the bottom of the cabinet.

Model No.

Serial No.

Date of purchase

Dealer’s address

Phone number

DECLARATION OF CONFORMITY

This product is marked «

» as it satisfies EEC Directive No. 89/336/
EEC, 73/23/EEC, 93/68/EEC and 92/31/EEC.
This declaration will become void in case of mis-usage and/or from non
observance though partial of Manufacturer’s installation and/or
operating instructions.

Alert Symbols

The following symbols used in this manual, alert you to potentially
dangerous conditions to users, service personnel or the appliance:

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

CAUTION

This symbol refers to a hazard or unsafe
practice which can result in personal
injury or product or property damage.

3OI-859-03EG

Installation Location

•

We recommend that this air conditioner be installed properly by
qualified installation technicians in accordance with the Installation
Instructions provided with the unit.

•

Before installation, check that the voltage of the electric supply in
your home or office is the same as the voltage shown on the
nameplate.

•

Do not install this air conditioner where there are fumes or
flammable gases, or in an extremely humid space such as a
greenhouse.

•

Do not install the air conditioner where excessively high heat­generating objects are placed.

Avoid:

To protect the air conditioner from heavy corrosion, avoid installing the
outdoor unit where salty sea water can splash directly onto it or in
sulphurous air near a spa.

Electrical Requirements

1. All wiring must conform to the local electrical codes. Consult your

dealer or a qualified electrician for details.

2. Each unit must be properly grounded with a ground (or earth) wire

or through the supply wiring.

3. Wiring must be done by a qualified electrician.

Safety Instructions

•

Read this Instruction Manual carefully before using this air
conditioner. If you still have any difficulties or problems, consult
your dealer for help.

•

This air conditioner is designed to give you comfortable room
conditions. Use this only for its intended purpose as described in
this Instruction Manual.

•

Never use or store gasoline or other flammable vapor or liquid near
the air conditioner — it is very dangerous.

•

This air conditioner has no ventilator for intaking fresh air from
outdoors. You must open doors or windows frequently when you
use gas or oil heating appliances in the same room, which
consume a lot of oxygen from the air. Otherwise there is a risk of
suffocation in an extreme case.

CAUTION

•

Do not turn the air conditioner on and off from the power mains
switch. Use the ON/OFF operation button.

•

Do not stick anything into the air outlet of the outdoor unit. This is
dangerous because the fan is rotating at high speed.

•

Do not let children play with the air conditioner.

•

Do not cool the room too much if babies or invalids are present.

4 OI-859-04EG

Names of Parts

NOTE

This illustration is based on the external view of a standard model.
Consequently, the shape may differ from that of the air conditioner
which you have selected.

This air conditioner consists of an indoor unit and an outdoor unit.
You can control the air conditioner with the remote control unit.

Air Intake Air from the room is drawn into this section and passes through

air filters which remove dust.

Air Outlet Conditioned air is blown out of the air conditioner through the

air outlet.

Remote Control Unit The wireless remote control unit controls power ON/OFF,

operation mode selection, temperature, fan speed, timer setting,
and air sweeping.

Refrigerant Tubes The indoor and outdoor units are connected by copper tubes

through which refrigerant gas flows.

Drain Hose Moisture in the room condenses and drains off through this

hose.

Outdoor (Condensing) Unit The outdoor unit contains the compressor, fan motor, heat

exchanger coil, and other electrical components.

INDOOR UNIT

Air intake

Air outlet

Remote
control
unit

Drain hose

Refrigerant tubes

OUTDOOR UNIT

Air outlet

5OI-859-05EG

Unit Display and Operation Selector

REMOTE CONTROL

receiver

This section picks up infrared signals from the remote control
unit (transmitter).

Operation selector

ON position This position is for operating the air conditioner with the

wireless remote control unit.
Set the selector normally in this position.

OFF position Switch the selector to the OFF position if you are not going to

use the air conditioner for a few days or longer.

The OFF position does not disconnect the power. Use the main
power switch to turn off power completely.

TEST position This position is used only when servicing the air conditioner.

CAUTION

Do not set at the TEST position for normal operation.

OPERATION lamp This lamp lights when the system is in the continuous DRY and

COOL mode.

TIMER lamp This lamp lights when the system is being controlled by the

timer.

OPERATION

TIMER

ON


OFF

TEST

OPERATION lamp
TIMER lamp

Operation selector

REMOTE CONTROL receiver

INDOOR UNIT

IMPORTANT

Avoid using radio equipment
such as mobile phone near
(within 1 m) the indoor unit.
Some radio equipment may
cause malfunction of the
unit.

If the trouble happens,
disconnect power and restart
the air conditioner after a
few minutes.

6 OI-859-06EG

Remote Control Unit (Display)

ON OFF

1HR.

C

SET TEMP

(1) Operation mode

COOL .......................................

MILD DRY................................

(2) Fan speed

Automatic operation ..............

HIGH ........................................

MEDIUM..................................

LOW.........................................

ON

Displayed when transmitting data

Displayed when setting temperature

Displayed when temperature is
shown

Displayed when the temperature
setting is at the upper or lower
allowable limit

Displayed when setting timer

C

OFF

1HR.

Symbols

Displayed when main unit sensor is in use

(3) Set temperature

16–30°C

When set to 28 °C...........

Current temprature

indication .........................

(4) Timer

24-hour clock with ON/OFF

Program Timer........................

24-hour ON Timer ..................

24-hour OFF Timer.................

1-hour OFF Timer...................

(5) NIGHT SETBACK ....................

(6) Confirmation of

transmission ...........................

(7) Flap angle indication .............

(8) Sweep indication....................

7OI-859-07EG

Remote Control Unit

NOTE

The illustration above pictures the remote control unit after the cover
has been lowered and removed.

Transmitter When you press the buttons on the remote control unit, the mark

appears in the display to transmit the setting changes to the receiver in
the air conditioner.

Sensor A temperature sensor inside the remote control unit senses the room

temperature.

Display Information on the operating conditions is displayed while the remote

control unit is switched on. If the unit is turned off, only the mode that
was set previously is still displayed.

NIGHT SETBACK

button

For details, see ‘‘Night Setback Mode’’. When you press this button in
the COOL mode, the

mark appears in the display, and the remote

control unit will automatically adjust the set temperature to save energy.

TEMP. setting buttons Press the

button to increase the set temperature.

Press the

button to reduce the set temperature.

ON/OFF operation

button

This button is for turning the air conditioner on and off.

Timer setting buttons First, press the PROGRAM button to select the mode you want.

Each time you press the ‘‘HH’’ button, the hours advance by one.
Each time you press the ‘‘MM’’ button, the minutes advance by one.

PROGRAM button For details, see ‘‘Setting the Timer’’.

Press this button to select the mode you want to program.

AIR CONDITIONER

Transmitter

Display

ON/OFF operation button

FLAP button

TEMP. setting buttons

1 HR. TIMER button

NIGHT SETBACK button

MODE selector button

Battery compartment
(Pull off the cover to expose the
batteries.)

FAN SPEED

selector button

ACL button

Program button

A/C SENSOR button

Timer setting buttons

ON I /OFF



1HR.

TIMER

TEMP.

MODE

FLAP

FAN SPEED

SELECT

HH

TIMER

SELECT

MM

TIME SET

NIGHT

SETBACK

BATTERIES

ACL

A/C

SENSOR

OFF ON

CLOCK

ON OFF

1HR.

C

SET TEMP

AIR CONDITIONER

A

(Cover closed)

Sensor

TIMER SELECT button

8 OI-859-08EG

Remote Control Unit (continued)

NOTE

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

TIMER SELECT button No display : The timer does not operate.

: The air conditioner stops at the set time.
: The air conditioner starts at the set time.
: The air conditioner stops and starts, or starts and stops,

at the set times every day.

MODE selector button

(COOL)

(DRY)

Use this button to select COOL or DRY mode.

: The air conditioner makes the room cooler.
: The air conditioner reduces the humidity in the room.

FLAP button Press this button either to select to set the airflow direction to one of

the six possible positions manually, or to select the sweep function,
which moves the flap up and down automatically.

: The airflow direction can be set manually. (six positions)
: The flap moves up and down automatically.

NOTE

To switch to the sweep function ( ) when in the manual ( ) mode,
hold down the FLAP button.

FAN SPEED selector

button

: The air conditioner automatically decides the fan speeds.
: High fan speed
: Medium fan speed
: Low fan speed

1 HR. TIMER button

(1-HOUR OFF TIMER)

: When you press this button, regardless of whether the unit

is operating or stopping, the unit operates for one hour and
then shuts down.

ACL button

(ALL CLEAR)

Puts the remote control unit into pre-operation status. Always press
this button after replacing the batteries.

A/C SENSOR button When you press this button (use a small-tipped object such as a

ballpoint pen), the

mark will appear at the display. And the room
temperature is detected by the sensor which is built into the indoor
unit and the air conditioner is controlled accordingly.

NOTE

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 on the indoor unit.

OFF

ON

1HR.

9OI-859-09EG

Using the Remote Control Unit

How to Install Batteries

1. Slide the cover in the direction

indicated by the arrow and
remove it.

2. Install two AAA alkaline
batteries. Make sure the
batteries point in the direction
marked in the battery
compartment.

3. Use a thin object such as the
tip of a pen to press the ACL
button.

NOTE

•

The batteries last about six months, depending on how much you
use the remote control unit. Replace the batteries when the remote
control unit’s display fails to light, or when the remote control
cannot be used to change the air conditioner’s settings.

•

Use two fresh leak-proof type-AAA alkaline batteries.

•

In replacing batteries, follow the instructions as mentioned in the
sub-section ‘‘How to Install Batteries’’.

•

If you do not use the remote control unit more than 1 month, take
out the batteries.

How to Use the Remote

Control Unit

When using the remote control unit, always point the unit’s transmitter
head directly at the air conditioner’s receiver.

Remote Control Unit

Installation Position

The remote control unit may be operated either from a non-fixed
position or from a wall-mounted position. To ensure that the air
conditioner operates correctly, DO NOT install the remote control unit in
the following places:

DO NOT

•

In direct sunlight

•

Behind a curtain or other places where it is covered

•

More than 8 m away from the air conditioner

•

In the path of the air conditioner’s airstream

•

Where it may become extremely hot or cold

•

Where it may be subject to electrical or magnetic noise

•

Where there is an obstacle between the remote control unit and air
conditioner (since a check signal is sent from the remote control unit
every 3 minutes)

ACL button

Air conditioner
(Indoor unit)

Remote control
unit

Receiver

(Transmitter head)

10 OI-859-10EG

Using the Remote Control Unit (continued)

Mounting the Remote

Control Unit

Mounting on a wall A. Removable mounting

1) Momentarily hold the remote control unit at the desired
mounting position.

2) Confirm that the air conditioner responds correctly when you
press keys on the remote control from that position.

3) After confirming correct operation, use a screwdriver to screw
the mounting screw into the wall.

4) Hang the remote control unit from the mounting screw.

B. Non-removable mounting

1) Momentarily hold the remote control unit at the desired
mounting position.

2) Confirm that the air conditioner responds correctly when you
press keys on the remote control from that position.

3) After confirming correct operation, use a screwdriver to screw
the mounting screw into the wall.

4) Remove the batteries of the remote control unit.

5) Use a screwdriver to screw the remote control unit securing
screw into the wall through the hole in the battery compartment.

6) Replace the batteries.

7) Again confirm that the remote control unit operates correctly.

(Packed in the
indoor unit)

(Packed in the
indoor unit)

Removable mounting Non-removable mounting

Wall Wall

11OI-859-11EG

Operation with the Remote
Control Unit

1. Operation

NOTE

Check that the circuit breaker on the power panel is turned on and that
the operation selector of the indoor unit is in the ON position.

Press the setting buttons as described below and change the settings as
desired.

STEP 1 Set the MODE selector button to COOL or DRY.

For cooling operation →
For dehumidifying operation →

STEP 2 To start the air conditioner, press the ON/OFF

operation button.

STEP 3 Press the TEMP. setting buttons to change the

temperature setting to the desired temperature.

Adjustable temperature range:

30 °C max.
16 °C min.

STEP 4 Set the FAN SPEED selector button to the setting

you want.

NOTE

If the fan speed is set to (Automatic), the fan
speed switches automatically, according to the
difference between the actual room temperature
and the temperature setting.

STEP 5 Press the FLAP button and set the airflow direction

as desired.
(Refer to ‘‘Adjusting the Airflow Direction’’ on page

19.)

To stop the air conditioner, press the ON/OFF operation button again.

ON I /OFF

1HR.

TIMER

TEMP.

MODE

FLAP

FAN SPEED

SELECT

HH TIMER

SELECT

MM

TIME SET

NIGHT

SETBACK

BATTERIES

ACL

A/C

SENSOR

OFF ON

CLOCK

HR.

C

SET TEMP

1

AIR CONDITIONER

A

STEP 5

STEP 1

STEP 4

STEP 3

STEP 2

12 OI-859-12EG

Operation with the Remote Control Unit (continued)

NOTE

•

Choose the best position in the room for the remote control unit,
which also acts as the sensor for room comfort and transmits the
operating instructions. Once you’ve found this best position, always
keep the remote control unit there.

•

This appliance has a built-in 3-minute time delay circuit to ensure
reliable operation. When the operation button is pressed, the
compressor will start running within three minutes. In the event of
power failure, the unit will stop. When the power is restored, the
unit will restart automatically after three minutes.

2. Adjusting the
Fan Speed

A. Automatic Simply set the FAN SPEED selector to the position.

A microcomputer in the air conditioner automatically controls the fan
speed when the

mode is selected. When the air conditioner starts
operating, the difference between the room temperature and the set
temperature is detected by the microcomputer which then automatically
switches the fan speed to the most suitable level.

Cooling and DRY mode:

When difference between
room temperature and set
temperature is

FAN SPEED

2 °C and over High
Between 2 °C and 1 °C Medium
Below 1 °C Low

NOTE

The above table assumes that the sensor on the remote control is being
used. If the sensor on the indoor unit is being used (the

indicator is
on), actual operation may differ slightly from the operation described in
the table.
(Refer to ‘‘A/C SENSOR button’’ on page 9.)

B. Manual If you want to adjust fan speed manually during operation, just set the

FAN SPEED selector as desired. [

, ,or ]

13OI-859-13EG

Operation with the Remote Control Unit (continued)

3. Night Setback Mode

Night Setback Mode is used for saving energy.

Press the NIGHT SETBACK button while operation.
The

mark appears in the display.

To release the night setback function, press the NIGHT SETBACK button
again.

In Cooling and DRY Mode:

(

and )

ON I /OFF

1HR.

TIMER

TEMP.

MODE

FLAP

HH TIMER

SELECT

NIGHT

SETBACK

OFF ON

CLOCK

HR.

C

SET TEMP

1

AIR CONDITIONER

A

When the night setback mode is selected, the air conditioner
automatically raises the temperature setting 1 °C when 30 minutes
have passed after the selection was made, and then another 1 °C
after another 30 minutes have passed, regardless of the indoor
temperature when night setback was selected. This enables you to
save energy without sacrificing comfort. This function is convenient
when gentle cooling is needed.

Setting
temperature

Press the
NIGHT SETBACK
button

1°C

1°C

30 min. 30 min.

Time

14 OI-859-14EG

Special Remarks

‘‘DRY’’ ( ) Operation

How it works?

•

Once the room temperature reaches the level that was set, the unit
repeats the cycle of turning on and off automatically.

•

During DRY operation, the fan speed is automatically set to LOW or
VERY LOW; the fan speed then switches back and forth between
LOW (for 20 seconds) and VERY LOW (for 10 seconds).

•

‘‘DRY’’ operation is not possible if the indoor temperature is 15 °C or
less.

Power failure

during operation

•

In the event of power failure, the unit will stop. When the power is
resumed, the unit will restart automatically after three minutes.

Clicking Sound

Clicking sound is

heard from the air

conditioner

•

In cooling operation, any plastic parts may expand or shrink due to a
sudden temperature change. In this event, a clicking sound may
occur. This is normal, and the sound will soon disappear.

Remote Control Unit

•

The remote control unit sends the setting condition to the air
conditioner regularly at three minute intervals.

15OI-859-15EG

Setting the Timer

1. How to set the
present time

(Example) To set to 21:10

2. How to set the
OFF time (Example) To stop the air conditioner at 23:30

ON I /OFF

MODE

FLAP

FAN SPEED

SELECT

HH TIMER

SELECT

MM

TIME SET

NIGHT

SETBACK

BATTERIES

ACL

A/C

SENSOR

OFF ON

CLOCK

Operation Indication

1. Press the Program button (

OFF ON

CLOCK

)

three times.

The time indication alone
flashes.

2.

•

Press the HH button until 21 is displayed.

•

Press the MM button until 10 is
displayed.

The display will auto­matically stop flashing
except for the ‘‘:’’ symbol
after 10 sec.

OFF

1. Press the Program button (

OFF ON

CLOCK

)

once.

The timer

OFF

and

time indications flash.

2.

•

Press the HH button until 23 is
displayed.

•

Press the MM button until 30 is
displayed.

The display will change
automatically back to
show the present time
after 10 sec.

3. Press the ON/OFF button to start the air
conditioner.

The present time is
displayed.

4. Press the TIMER SELECT button to set
OFF time.

The present time and

OFF

are displayed.

16 OI-859-16EG

Setting the Timer (continued)

3. How to set the ON time (Example) To start operation at 7:10

4. How to set a program
for daily ON/OFF
operation

(Example) To start operation at 7:10 and stop the air conditioner at

23:30

NOTE

You can check the timer ON/OFF times after you have set them by
pressing the PROGRAM button.

ON

Operation Indication

1. Press the Program button (

OFF ON

CLOCK

)

twice.

The timer ON and time
indications flash.

2.

•

Press the HH button until 7 is
displayed.

•

Press the MM button until 10 is
displayed.

The display will change
automatically back to show
the present time after 10
sec.

3. Press the ON/OFF button to start the
air conditioner.

The present time is
displayed.

4. Press the TIMER SELECT button to set
ON time.

The present time and

ON

are displayed.

1. Set the timer ON/OFF times as shown
in 2 and 3.

2. Press the ON/OFF button to start the
air conditioner.

3. Press the TIMER SELECT button to set
the ON/OFF combination timer.

is displayed.

17OI-859-17EG

Using the 1-Hour OFF Timer

1. 1-Hour OFF Timer This function causes the unit to operate for one hour and then stop,

regardless of whether the unit is on or off when this button is pressed.

The

1HR.

indicator in the display indicates that this function is

operating.

Setting procedure:

Regardless of whether the unit is operating or stopped, press the 1 HR.
TIMER button.

1HR.

appears in the display.

Cancellation procedure:

Press the ON/OFF operation button to turn the unit off, wait for the unit
to stop operating, and then press the ON/OFF operation button again.
The 1-Hour Timer function is now cancelled and the unit operates
normally.

NOTE

•

If, while the 1-Hour Timer function is operating, the 1 HR. TIMER
button is pressed once to cancel the function and then again, the
unit continues to operate for one hour from that point in time and
then stops.

2. Operation Together
with the Program

Timer

•

The Program Timer and 1-Hour OFF Timer may be used together.

•

It is not possible to use the OFF Timer and 1-Hour OFF Timer
together. Whichever function is set last takes precedence.
If the 1 HR. TIMER button is pressed while the TIMER OFF function
operates, the OFF Timer is cancelled and the unit will stop operating
one hour later.

1HR.

ON I /OFF

1HR.

TIMER

TEMP.

FLAP

HH TIMER

18 OI-859-18EG

Adjusting the Airflow Direction

1. Horizontal The horizontal airflow can be adjusted by moving the vertical vanes with

your hands to the left or right.

CAUTION

When the humidity is high, the vertical vanes should be in the front
position during the cooling or dehumidifying operation. If the vertical
vanes are positioned all of the way to the right or left, condensation
may begin to form around the air vent and drip down.

2. Vertical The vertical airflow can be adjusted by moving the flap with the remote

control unit. Do not move the flap with your hands. Confirm that the
remote control unit has been turned on. Use the FLAP button to set
either the sweep function or one of the six airflow direction settings.

A. Sweep function B. Setting the Airflow Manually

The flap starts moving up and down to
deliver air over the sweep range.

Referring to the above illustration, use
the FLAP button to set the airflow
direction within the range used during
the cooling or dehumidifying operation.

NOTE

•

The flap automatically closes when the unit is off.

CAUTION

•

Use the FLAP button on the remote control to adjust the position of
the flap. If you move the flap by hand, the flap position according to
the remote control and the actual flap position may no longer
match. If this should happen, shut off the unit, wait for the flap to
close, and then turn on the unit again; the flap position will now be
normal again.

•

Do not have the flap pointed down during cooling operation.
Condensation may begin to form around the air vent and drip down.

COOL

and

DRY

SWEEP

1

2

3

4

5

6

ON I /OFF

MODE

FLAP

FAN SPEED

SELECT

HH TIMER

SELECT

MM

TIME SET

NIGHT

SETBACK

BATTERIES

ACL

A/C

SENSOR

OFF ON

CLOCK

19OI-859-19EG

Operation without the Remote
Control Unit

If you have lost the remote control unit or it has trouble, follow the
steps below.

1. When the air conditioner is not running
If you want to turn on the air conditioner, switch the operation selector
to the OFF position, and then to the ON position.

NOTE

The set temperature and fan speed are automatically set at
the last selection before stopping.

2. When the air conditioner is running
If you want to turn off the air conditioner, switch the operation selector
to the OFF position.

Care and Cleaning

1. For safety, be sure to turn the air conditioner off and also to
disconnect the power before cleaning.

2. Do not pour water on the indoor unit to clean it. This will damage
the internal components and cause an electric shock hazard.

Casing and Grille

(Indoor Unit)

Clean the casing and grille of the indoor unit with a vacuum cleaner
brush, or wipe them with a clean, soft cloth.

If these parts are stained, use a clean cloth moistened with a mild liquid
detergent. When cleaning the grille, be careful not to force the vanes out
of place.

CAUTION

1. Never use solvents, or harsh chemicals when cleaning the indoor
unit. Do not wipe the plastic casing using very hot water.

2. Some metal edges and the fins are sharp and may cause injury if
handled improperly; be especially careful when you clean these
parts.

3. The internal coil and other components of the outdoor unit must
be cleaned every year. Consult your dealer or service center.

ON


OFF

TEST

Operation
selector

INDOOR UNIT

20 OI-859-20EG

Care and Cleaning (continued)

Anti-Mold Filter The anti-mold filter behind the air intake grille should be checked and

cleaned at least once every two weeks.

How to remove the

anti-mold filter

1. Grasp both ends of

the air intake grille
and pull it out and
up.

2. Push the anti-mold
filter up slightly, and
then pull it down.

Cleaning Use a vacuum cleaner to remove light dust. If there is sticky dust on the

filter, wash the filter in lukewarm, soapy water, rinse it in clean water,
and dry it.

How to replace the

anti-mold filter

1. With the ‘‘FRONT’’ mark

facing you, slide the
anti-mold filter up into the
unit and then lower the
handle into the groove on
the unit.

2. After installing the anti-mold
filter, press the locations
marked by the arrows (

)
and close the air intake
grille.

Air intake grille

Anti-mold filter

Air intake grille

Anti-mold
filter

Insert into the groove on the unit.

21OI-859-21EG

Care and Cleaning (continued)

Air Clean Filter

(not provided)

The air cleaning filter removes dust and dirt from the air, and reduces
odors and smoke from tobacco.

NOTE

The air clean filter is not provided with the air conditioner and must be
purchased separately. The first time that you buy the air clean filter, it is
necessary to get the STK-ARF4B-50 model with frame. When changing
the filter subsequently, it is only necessary to replace the filter itself
(model STK-F4B-50).

This air clean filter cannot remove harmful gases or vapors nor ventilate
air in the room. You must open doors or windows frequently when you
use gas or oil heating appliances. Otherwise there is a risk of
suffocation in extreme cases.

How to install the air clean

filter

The air clean filter needs to be
installed behind the anti-mold
filter.

1. Remove the anti-mold filter.

2. Install the air clean filter in

the position shown in the
diagram, with the ‘‘

’’
symbols (meaning ‘‘FRONT’’)
facing the front.

3. Reinstall the anti-mold filter.

Cleaning the main unit and

remote control unit

•

Wipe clean using a soft, dry cloth.

•

To remove stubborn dirt, moisten a cloth in warm water no hotter
than 40°C, wring thoroughly, and then wipe.

•

The air intake grille can be removed in order to wash it with water.

Removing and remounting

the air intake grille

•

With the air intake grille
open all the way, grip
both arms with your
hands and pull toward
you to remove.
To remount, hold the air
intake grille roughly
horizontal and push it in
until the arm shafts fit
into the indentations in
the main unit, then fit the
grille into place.

CAUTION

When using a footstool or the like, be careful not to let it tip over.

Washing the grille with

water

•

Clean the grille gently using a soft sponge, or the like. Then wipe
away any remaining moisture.

•

Neutral detergent may be used to remove stubborn dirt. Then rinse
thoroughly with water and wipe away any remaining moisture.

Air
clean
filter

Air intake grille

Arm

22 OI-859-22EG

Troubleshooting

If your air conditioner does not work properly, first check the following points before requesting service. If
it still does not work properly, contact your dealer or service center.

Trouble Possible Cause Remedy

Air conditioner does not
run at all.

1. Power failure. 1. Restore power.

2. Leakage breaker tripped. 2. Contact service center.

3. Line voltage is too low. 3. Consult your electrician or dealer.

4. Operation button is OFF. 4. Press the button again.

5. Batteries in remote control unit
have run down.

5. Replace batteries.

OPERATION lamp flashes
and air conditioner does
not operate.

Trouble in wiring system. Contact service center.

Compressor runs but
soon stops.

Obstruction in front of condenser coil. Remove obstruction.

Poor cooling
performance.

1. Dirty or clogged air filter. 1. Clean air filter to improve airflow.

2. Heat source or many people in
room.

2. Eliminate heat source if possible.

3. Doors and/or windows are open. 3. Shut them to keep the heat out.

4. Obstacle near air intake or air
discharge port.

4. Remove it to ensure good airflow.

5. Thermostat is set too high for
cooling.

5. Set the temperature lower.

Clicking sound is heard
from the air conditioner.

In cooling operation, any plastic parts
may expand or shrink due to a
sudden temperature change. In this
event, a clicking sound may occur.

This is normal, and the sound will
soon disappear.

OPERATION lamp lights
but outdoor unit will not
run.

1. The use of portable telephones
near the air conditioner may cause
disturbance to its normal
operation.

1. Turn off the power then restart the
air conditioner after 1 minute.

2. Consult your dealer.

Tips for Energy Saving

Do not

•

Block the air intake and outlet of the unit. If they are obstructed,
the unit will not work well, and may be damaged.

•

Let direct sunlight into the room. Use sunshades, blinds or curtains.
If the walls and ceiling of the room are warmed by the sun, it will
take longer to cool the room.

Do

•

Always try to keep the air filter clean. (Refer to ‘‘Care and Cleaning’’.)
A clogged filter will impair the performance of the unit.

•

To prevent conditioned air from escaping, keep windows, doors and
any other openings closed.

23OI-859-23EG

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Tel. [phone] - Fax [phone]

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