goClima AWR518CL, FCR518CL, AER518SC Technical Data & Service Manual

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TECHNICAL DATA & SERVICE MANUAL

Indoor Unit Outdoor Unit

AWR518CL AER518SC FCR518CL

SPLIT SYSTEM AIR CONDITIONER

AER518SC

FCR518CL

AE522SC

0.8180.218.0 07/2001

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 4

2-3 Other Component Specifications 7 3 DIMENSIONAL DATA 9 4 REFRIGERANT FLOW DIAGRAM 12 5 PERFORMANCE DATA

5-1 Performance Charts 13 5-2 Air Throw Distance Chart 14 5-3 Cooling Capacity 16

6 ELECTRICAL DATA

6-1 Electrical Characteristic 18

6-2 Electric Wiring Diagrams 19 7 INSTALLATION INSTRUCTIONS

7-1 Installation Site Selection 21 7-2 Remote Control Unit Installation Position 23 7-3 Recommended Wire Length and Diameter 24

8 FUNCTION 8-1 Room Temperature Control 25 8-2 Dry Operation 26 8-3 Freeze prevention 26 8-4 Outdoor Fan Speed Control 27

9 REFRIGERANT R407C:SPECIAL PRECAUTION WHEN SERVICING UNIT 9-1 Characteristics of new refrigerant R407c 28 9-2 Checklist before servicing 28 9-3 Tools specifically for R407c 29 9-4 For tubing installation procedures 29 9-5 In case of compressor malfunction 30 9-6 In case refrigerant is leaking 31 9-7 Charging additional refrigerant 34 9-8 Retro-fitting existing system 34

10 TROUBLESHOOTING

10-1 Check before and after troubleshooting 35

10-2 Air Conditioner Does not operate 36

10-3 Some Parts of Air Conditioner does not operate 40 10-4 Air Conditioner Operates, but abnormalities are observed 42 10-5 If a sensor is defective 43

11 CHECKING ELECTRICAL COMPONENTS 11-1 Measurements of insulation resistance 44 11-2 Checking continuity of fuse on PCB ass’y 45 11-3 Checking motor capacitor 46

12 DISASSEMBLY PROCEDURE FOR INDOOR UNIT 12-1 Removing air intake grille 46 12-2 Removing side panels 47 12-3 Access and removal of electrical components box 47 12-4 Removing flap motor 48 12-5 Removing evaporator 48 12-6 Removing fan and fan motor 50

iii

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. 19°C D.B.

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.

Power Source 230 V Single phase 50Hz Voltage rating V 230

Cooling

Capacity

kW 4.80

BTU/h 16400

Air circulation (High) m

/h 760 Moisture removal (High) Liters/h 2.2 Available voltage range V 198 to 264 Running amperes A 9.1 Power input W 1950 Power factor % 93 C.O.P. W/W 2.50 Compressor locked rotor amperes A 43 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 / Auto(Hi, Lo)

Airflow direction (Indoor)

Horizontal Manual

Vertical Auto Air filter Washable Compressor Rotary (Hermetic) Refrigerant / Amount charged at shipment g R407c / 1840 Refrigerant control Capillary tube

Noise Power Level

Indoor – Hi / Me / Lo dB-A 55 / 51/ 49

Outdoor – Hi dB-A 62 Refrigerant tubing connections Flare type Max. allowable tubing length at shipment m 7.5

Refrigerant tube

Narrow tube mm (in.) 6.35 (1/4) diameter

Wide tube mm (in.) 12.7 (1/2) Refrigerant tube kit / Accessories Optional / Hanging wall bracket

Indoor Unit Outdoor Unit

Unit dimensions Height mm 285 630

Width mm 995 830

Depth mm 206 305 Package dimensions Height mm 276 713

Width mm 1,070 994

Depth mm 363 413

Weight Net

kg 12.0 52.0

Shipping

kg 15.0 57.0

Shipping volume m

0.11 0.29

Dimensions & Weight Features Electrical Rating Performance

Indoor Unit AWR518CL Outdoor Unit AER518SC

2. SPECIFICATIONS

2-1. Unit Specifications

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.

Power Source 230 V Single phase 50Hz Voltage rating V 230

Cooling

Capacity

kW 4.80

BTU/h 16400

Air circulation (High) m

/h 800 Moisture removal (High) Liters/h 2.3 Available voltage range V 198 to 264 Running amperes A 9.1 Power input W 1950 Power factor % 93 C.O.P. W/W 2.5 Compressor locked rotor amperes A 43 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 / Auto(Hi, Lo)

Airflow direction (Indoor)

Horizontal Manual

Vertical Auto Air filter Washable Compressor Rotary (Hermetic) Refrigerant / Amount charged at shipment g R407c / 1840 Refrigerant control Capillary tube

Noise Power Level

Indoor – Hi / Me / Lo dB-A 58 / 55 / 52

Outdoor – Hi dB-A 62 Refrigerant tubing connections Flare type Max. allowable tubing length at shipment m 7.5

Refrigerant tube

Narrow tube mm (in.) 6.35 (1/4) diameter

Wide tube mm (in.) 12.7 (1/2) Refrigerant tube kit / Accessories Optional / Hanging wall bracket

Indoor Unit Outdoor Unit

Unit dimensions Height mm 680 630

Width mm 900 830

Depth mm 190 305 Package dimensions Height mm 813 713

Width mm 1011 994

Depth mm 296 413

Weight Net

kg 23.5 52.0

Shipping

kg 30.0 57.0

Shipping volume m

0.24 0.29

Dimensions & Weight Features Electrical Rating Performance

Indoor Unit FCR518CL Outdoor Unit AER518SC

2-2. Major Component Specifications

2-2-1. Indoor Unit

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Part No. POW–K188E Controls Microprocessor Control circuit fuse 250 V – 3.15 A

Remote Control Unit RCS–8PS3E

Type Cross-flow Q´ty ... Dia. and length mm 1 ... ø88 / L746 Fan motor model ... Q´ty UF2– 31A5PA–S ... 1 No. of poles ... rpm (High) 2 ... 1,305 Nominal output W 30 Coil resistance (Ambient temp. 20°C) Ω WHT – BRN : 130.4

WHT – PNK : 169.8

– : – – : – – : –

Safety

Type Thermal protector

devices Operating temp. Open °C 130 ± 8

Close Automatic reclosing

Run capacitor µF 2.0

VAC 440 Type Stepping motor Model MP24GA2 Rating DC 12 V Coil resistance (Ambient temp. 20°C) Ω Each terminals (1–2, 1–3, 1–4, 1–5) 400 : ± 7% Coil Aluminum plate fin / Copper tube Rows 2 Fin pitch mm 1.3 Face area m2 0.250

Heat

Exch. Coil

Flap Motor Fan & Fan Motor

Controller

PCB

Indoor Unit AWR518CL

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

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

Remote Control Unit RCS – 5PN3E

Type Centrifugal Number ... Dia. and length mm 2 ... ø 130 / L 180 Fan motor model ... Number K48410–M01417 ... 1 No. of poles ... rpm (230 V, High) 4 ... 1,140 Nominal output W 27 Coil resistance (Ambient temp. 20°C) Ω GRY – WHT : 215 ± 7%

WHT – VLT : 87 ± 7%

VLT – YEL : 87 ± 7%

WHT – PNK : 273 ± 7%

Safety

Type Internal thermal fuse

devices

Operating temp.

Open °C 145 ± 5 Close Automatic reclosing

Run capacitor

µF 2.0

VAC 440 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%

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

0.192

Heat

Exch. Coil

Flap Motor Fan & Fan Motor

Controller

PCB

Indoor Unit FCR518CL

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Controller PCB —

Type Rotary (Hermetic) Compressor model C–2RN150H5W 80805045 Nominal output W 1500 Compressor oil ... Amount cc DAPHNE FV68S ... 750 Coil resistance (Ambient temp. 25°C) Ω C – R : 1.42

C – S : 4.12

Type Internal protector

Safety

Overload relay —

devices Operating temp. Open °C Automatic opening

Close °C Automatic reclosing

Operating amp.(Ambient temp. 25°C) —

Run capacitor µF 40.0

VAC 450 Crank case heater Type Propeller Number ... Dia. mm 1 ... ø 400 Fan motor model ... Number Smen 19TFB6055 ... 1 No. of poles ... rpm (230 V, High) 6 ... 910 Nominal output W 43

Coil resistance (Ambient temp. 20°C) Ω WHT – BRN : 77.7 ± 7%

WHT – YEL : 366.0 ± 7%

WHT – PNK : 211.0 ± 7%

Safety

Type Thermal protector

devices Operating temp. Open °C 130 ± 5

Close Automatic reclosing

Run capacitor µF 5.2

VAC 440 Coil Aluminum plate fin / Copper tube Rows 2 Fin pitch mm 1.8 Face area m

0.508

External Finish Acrylic baked-on enamel finish

Heat

Exch. Coil

CompressorFan & Fan Motor

Outdoor Unit AER518SC

2-3. Other Component Specifications

Thermistor (Room sensor) DTN-TKS142B

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 AWR518CL

Indoor Unit FCR518CL

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%

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%

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

Thermostat (Fan Speed Control 23S) MQT5S-27YZJ

Switching temp. °C

high ➞ LOW 23.5°C

+0 –2.5

low ➞ HIGH 27.0°C

+0 –3

Contact rating AC 220V, 3A

Power Relay G7L-2A-TUB

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

Outdoor Unit AER518SC

3. DIMENSIONAL DATA

Indoor Unit AWR518CL

28545

995

147.5 147.5

206 (3)

Remote control unit

Center of tubing hole (2 places)

Narrow tube ø6.35 (1/4")

Drain hose ø18

Wide tube ø12.7 (1/2") KR188E

18.5

172.5

Unit : mm

Indoor Unit FCR518CL

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

190

680

FCR518CL

Dimensions : mm

18.5

172.5

Outdoor Unit AER518SC

Air discharge

Air intake

538 146

307

337

4 – ø12 holes

830

630

305

61 95

Wide tube service valve ø12.7 (1/2")

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

Unit : mm

4. REFRIGERANT FLOW DIAGRAM

Capillary tube

Compressor

Accumulator

Wide tube service valve

Wide tube

O.D. ø12.7 mm (1/2 ")

Narrow tube service valve

Narrow tube

O.D. ø6.35 mm (1/4")

Condenser

Indoor Unit Outdoor Unit

Evaporator

Strainer

Indoor Unit AWR518CL Outdoor Unit AER518SC

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

FCR518CL

5. PERFORMANCE DATA

5-1. Performance charts

● ...... 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 AWR518CL

Outdoor Unit AER518SC

■ Cooling Characteristics

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

1.18 (11)

1.08 (10)

0.98 ( 9 )

0.89 ( 8 )

0.79 ( 7 )

0.69 ( 6)

0.59 ( 5 )

0.49 ( 4 )

0.39 ( 3 )

0.29 ( 2 )

0.19 ( 1 )

25 30 35 40 45 50

Outdoor inlet air D.B. temp. (°C)

Outdoor fan speed

HighLow

15 14 13 12 11 10

9 8 7

25 30 35 40 45 50

Outdoor inlet air D.B. temp. (°C)

Operating current (A)

Outdoor fan speed

HighLow

32 27

32 27 21

Indoor inlet air

D.B. temp. (°C)

Indoor inlet air

D.B. temp. (°C)

5-2. Air Throw Distance Chart

Horizontal distance (m)

Axis air velocity (m/s)

Vertical distance (m)

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

0 1 2 3 4 5 6 7 8 9

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

Indoor Unit AWR518CL

Indoor Unit FCR518CL

01234567

Horizontal distance (m)

Axis air verocity (m/s)

Vertical distance (m)

Axis air verocity (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

AIR FLOW CHART

RATING CAPACITY 4.8 kW AIR FLOW RATE 760 m³/h

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

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

TC 4.55 4.41 4.21 3.94 3.64

CM 1.61 1.71 1.84 2.02 2.20 21 SHC 3.12 3.06 2.95 2.83 2.68 23 SHC 3.54 3.46 3.36 3.23 3.09

15 25 SHC 3.94 3.86 3.76 3.63 3.49

27 SHC 4.35 4.27 4.16 3.94 3.64 29 SHC 4.55 4.41 4.21 3.94 3.64 31 SHC 4.55 4.41 4.21 3.94 3.64

TC 4.93 4.74 4.51 4.24 3.90

CM 1.64 1.76 1.89 2.08 2.26 21 SHC 2.73 2.65 2.55 2.42 2.26 23 SHC 3.14 3.05 2.94 2.82 2.67

17 25 SHC 3.55 3.45 3.35 3.22 3.07

27 SHC 3.96 3.85 3.75 3.62 3.47 29 SHC 4.38 4.26 4.15 4.03 3.87 31 SHC 4.79 4.65 4.51 4.24 3.90

TC 5.22 5.04 4.80 4.51 4.15

CM 1.72 1.82 1.95 2.14 2.32 21 SHC 2.29 2.21 2.11 1.98 1.84 23 SHC 2.69 2.62 2.51 2.39 2.24

19 25 SHC 3.08 3.02 2.91 2.80 2.64

27 SHC 3.47 3.42 3.32 3.19 3.05 29 SHC 3.86 3.82 3.71 3.60 3.44 31 SHC 4.27 4.23 4.12 4.00 3.85

TC 5.53 5.34 5.09 4.78 4.40

CM 1.76 1.87 2.01 2.20 2.39 23 SHC 2.26 2.18 2.08 1.95 1.81

21 25 SHC 2.64 2.58 2.48 2.36 2.21

27 SHC 3.04 2.98 2.88 2.77 2.61 29 SHC 3.43 3.38 3.29 3.16 3.02 31 SHC 3.83 3.79 3.68 3.57 3.42

TC 5.91 5.66 5.34 5.00 4.65

CM 1.80 1.91 2.06 2.25 2.45

23 25 SHC 2.21 2.12 2.00 1.88 1.75

27 SHC 2.59 2.51 2.40 2.27 2.15 29 SHC 2.98 2.92 2.81 2.68 2.56 31 SHC 3.41 3.33 3.20 3.08 2.96

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 AWR518CL Outdoor Unit AER518SC

5-3. Cooling Capacity

RATING CAPACITY 4.8 kW AIR FLOW RATE 760 m³/h

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

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

TC 4.55 4.41 4.21 3.94 3.64

CM 1.61 1.71 1.84 2.02 2.20 21 SHC 3.12 3.06 2.95 2.83 2.68 23 SHC 3.54 3.46 3.36 3.23 3.09

15 25 SHC 3.94 3.86 3.76 3.63 3.49

27 SHC 4.35 4.27 4.16 3.94 3.64 29 SHC 4.55 4.41 4.21 3.94 3.64 31 SHC 4.55 4.41 4.21 3.94 3.64

TC 4.93 4.74 4.51 4.24 3.90

CM 1.64 1.76 1.89 2.08 2.26 21 SHC 2.73 2.65 2.55 2.42 2.26 23 SHC 3.14 3.05 2.94 2.82 2.67

17 25 SHC 3.55 3.45 3.35 3.22 3.07

27 SHC 3.96 3.85 3.75 3.62 3.47 29 SHC 4.38 4.26 4.15 4.03 3.87 31 SHC 4.79 4.65 4.51 4.24 3.90

TC 5.22 5.04 4.80 4.51 4.15

CM 1.72 1.82 1.95 2.14 2.32 21 SHC 2.29 2.21 2.11 1.98 1.84 23 SHC 2.69 2.62 2.51 2.39 2.24

19 25 SHC 3.08 3.02 2.91 2.80 2.64

27 SHC 3.47 3.42 3.32 3.19 3.05 29 SHC 3.86 3.82 3.71 3.60 3.44 31 SHC 4.27 4.23 4.12 4.00 3.85

TC 5.53 5.34 5.09 4.78 4.40

CM 1.76 1.87 2.01 2.20 2.39 23 SHC 2.26 2.18 2.08 1.95 1.81

21 25 SHC 2.64 2.58 2.48 2.36 2.21

27 SHC 3.04 2.98 2.88 2.77 2.61 29 SHC 3.43 3.38 3.29 3.16 3.02 31 SHC 3.83 3.79 3.68 3.57 3.42

TC 5.91 5.66 5.34 5.00 4.65

CM 1.80 1.91 2.06 2.25 2.45

23 25 SHC 2.21 2.12 2.00 1.88 1.75

27 SHC 2.59 2.51 2.40 2.27 2.15 29 SHC 2.98 2.92 2.81 2.68 2.56 31 SHC 3.41 3.33 3.20 3.08 2.96

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 FCR518CL

Outdoor Unit AER518SC

6. ELECTRICAL DATA

6-1. Electrical Characteristics

Indoor Unit Outdoor Unit Complete Unit

Fan Motor Fan Motor Compressor Performance at 230V Single phase 50Hz Rating Conditions Running Amps. A 0.37 0.50 8.23 9.1

Power Input kW 0.070 0.093 1.78 1.95

Full Load Conditions Running Amps. A 0.37 0.50 9.63 10.5

Power Input kW 0.070 0.093 2.13 2.30

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 46°C D.B.

Indoor Unit AWR518CL Outdoor Unit AER518SC

Indoor Unit Outdoor Unit Complete Unit

Fan Motor Fan Motor Compressor Performance at 230V Single phase 50Hz Rating Conditions Running Amps. A 0.33 0.50 8.27 9.1

Power Input kW 0.070 0.093 1.78 1.95

Full Load Conditions Running Amps. A 0.33 0.50 9.67 10.5

Power Input kW 0.070 0.093 2.13 2.30

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 46°C D.B.

Indoor Unit FCR518CL Outdoor Unit AER518SC

sure to disconnect power before checking, servicing and/or cleaning any electrical parts

6-2 Electric Wiring Diagrams

To avoid electrical shock hazard, be

WARNING

Indoor Unit AER518CL

Outdoor Unit AER518SC

Indoor Unit FCR518CL

WARNING

To avoid electrical shock hazard, be

sure to disconnect power before checking, servicing and/or cleaning any electrical parts

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.

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 7.5 to 20 m (max.), charge additional refrigerant ( R407c) by 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)*

AER518SC 20

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 less than

1.5m from floor level.

CAUTION

Fig. 2b

7.5

7 25

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. 4a to 4b

●

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.5a)

●

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

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

Fig. 5 - A

Ground

Obstacle

Obstacle above

Air discharge

Min. 2 m

Min.

2 m

Side View

Fig. 4c

Required space around the unit.

Top View

Fig. 4a

Fig. 5a

Fig. 5 - B

AER518SC mod.

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.6a)

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.6a)

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.6b)

7) Replace the batteries.

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

Wall

Special mounting screw

Screw

Wall

Fig.6b

Fig.6a

Removable mounting

Non-removable mounting

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 2 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 2.

NOTE

●

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 outdoor unit as shown in the wiring diagram. The indoor unit draws its power from the outdoor unit.

WARNING

CAUTION

WIRING SYSTEM DIAGRAM

Power supply

220 – 240 V 50Hz

Ground

(A)

INDOOR

UNIT

OUTDOOR

UNIT

AER518SC

L N

1 2

4 4

(B)

7-3. Recommended Wire Length and Size

Table 2

Cross-Sectional

Fuse or Circuit

Area (mm

)

2.5 2.5

Model

Breaker Capacity

AER518SC

20 A22

(A) Power Supply Wiring Length (m)

(B) Power Line

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. ON

Thermo. OFF

Thermo. ON

Room temp.

Signal from remote control unit

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.

8-3. Freeze Prevention

●

This function prevents freezing of the indoor heat exchange coil.

●

When the compressor has been running for 10 minutes 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.

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

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.

8-4. Outdoor Fan Speed Control

●

To optimize performance of the air conditioner, the outdoor fan speed is switched automatically according to the outdoor temperature.

●

If the outdoor air temperature falls below A°C, the fan speed switches to LOW.

●

If the outdoor air temperature rises above B°C, the fan speed switches to HIGH.

The operating temperature shown as A and B in the chart differ by models.

NOTE

H H

Outdoor air temperature (°C)

Outdoor fan speed

Models A B

AER518SC 23.5°C 27.0°C

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

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.

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 "9-3. 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:

CAUTION

(1). Recovering refrigerant

(2). Replacing compressor

(3). Checking for sealing

(4). Evacuation

(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

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

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

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:

(2). Recovering refrigerant

(3). Welding leaking points

(4). Checking for sealing

(5). Evacuation

(6). Recharging

(1). Detecting leaks

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.

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%.

CAUTION

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

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 "9-6. 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.

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 outdoor unit.

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

●

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

Power supply : 220–240V~50Hz

1 2

4 L

1 2

Indoor

unit

Outdoor

unit

Ground

Inter–unit power wiring

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”).

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

●

There is a possibility of short circuit.

Replace with suitable one (larger capacity).

•

Check capacity of circuit breaker. Capacity of circuit breaker is

suitable.

Measure resistance of outdoor fan motor winding.

Measure resistance of compressor motor winding.

Measure insulation resistance of electrical parts in outdoor unit.

Measure insulation resistance of electrical parts in indoor unit.

Remove both power supply wires and inter-unit wires from terminal plate in outdoor unit.

Measure insulation resistance of outdoor unit.

•

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

Measure insulation resistance of indoor unit.

•

Insulation of outdoor unit is defective.

Insulation of indoor unit is defective.

Set circuit breaker to OFF.

WARNING

Indoor

unit

Outdoor

unit

Inter–unit wiring

Power supply wiring

Power supply

Ground

AER518SC

1 1 2 2

4 4

L N

Circuit breaker

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

A. Power is not supplied.

B. Check remote control unit.

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

D. Check transformer in indoor unit.

•

Measure resistance of primary and secondary winding. (TR)

YES

•

OPERATION selector switch is set in ON position.

Set OPERATION selector switch to ON.

Indoor PCB Ass'y is defective.

•

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.

•

Check power supply. Power is being supplied to the

outdoor unit.

Circuit breaker is tripped.

Power failure

Reset breaker.

Wait for recovery or contact power company.

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 is displayed on remote control.

YES

Cancel the timer mode.

•

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 or switch Ass'y is defective.

•

Measure resistance of indoor fan motor winding. (FM)

•

Measure resistance of flap motor winding. (FLP)

•

Measure coil resistance of either power relay or magnetic contactor.

(PR or MG )

Replace the fuse.

If fuse has been blown,

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

A. Check setting temperature.

B. Check power relay in outdoor unit.

•

Power relay sounds "click" when 220 to 240V is applied.

Check indoor PCB Ass'y.

(PR)

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.

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.

•

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. (C2)

Fan cannot be turned.

•

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. (C1)

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

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

10-3-5. Function of outdoor fan speed control does not work properly

Refer to "8-4. Outdoor Fan Speed Control".

•

Check thermostat in outdoor unit.

(23S)

•

Measure resistance of flap motor winding.

(FLP)

•

Check compressor motor capacitor. (C3)

•

Measure resistance of compressor motor winding.

YES

•

Either internal protector or overload relay is working.

(Either OLR or 49C)

YES

•

Temperature of compressor is abnormally high.

Refrigerant gas shortage. Charge refrigerant gas

(R407c).

Rotor may be locked up.

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

10-4-1. Poor cooling.

10-4-2. Excessive cooling.

•

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.

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 (R 407c).

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.

10-5. If a sensor is defective.

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

A. Open

When thermistor opens, the air conditioner will be in the following conditions as the controller tries to detect extremely low indoor coil temperature.

In Cooling mode: Function of freeze prevention continues to work. That is, the controller turns both

compressor and outdoor fan motor periodically ON and OFF for several minutes. (Refer to "8-3. Freeze Prevention")

B. Short

When thermistor is short, the air conditioner will be in the following conditions as the controller tries to detect extremely high indoor coil temperature.

In Cooling mode: Function of freeze prevention will not work even when the frost builds up on indoor heat

exchanger coil

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

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 ground wire of the power supply wires with the lead clip of the insulation resistance tester and measure the resistance by placing a probe on either of the power wires. (Fig. 1)

Then measure the resistance between the ground wire and the other power wire. (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 on the terminal plate. (Fig. 2) Note that the ground line terminal should be skipped for the check.

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 where power supply lines are connected on the terminal plate. (Fig. 2)

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

Insulation tester

Probe

Clip

Ground wire

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

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

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.

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

Slot

Screw

Electrical component box

Screw

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

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

(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

Fig.9

Fig.10

Fig.11

IMPORTANT

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

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

Printed in italy

Via Varese, 90 - 21013 Gallarate - Va - Italy

Tel. +39 0331 755111 - Fax +39 0331 776240

www.argoclima.it

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