SAMSUNG AWH1808ER Service Manual

ROOM AIR CONDITIONER

AWH-1808ER

Manual

SERVICE

AIR CONDITIONER

1. Precautions

2. Product Specifications

3. Installation and Operating Instructions

4. Disassembly and Reassembly

5. Troubleshooting

6. Exploded Views and Parts List

7. Block Diagram

CONTENTS

8. PCB Diagram

9. Wiring Diagram

10. Schematic Diagrams

ELECTRONICS

Samsung Electronics Co., Ltd. NOV. 1997.

Printed in Korea. Code No. DB81-10131A

1. Precautions

1. Warning: Prior to repair, disconnect the power cord from the circuit breaker.

2. Use proper parts: Use only exact replacement parts. (Also, we recommend replacing parts rather than repairing them.)

3. Use the proper tools: Use the proper tools and test equipment, and know how to use equipment may cause problems laterintermittent contact, for example.

4. Power Cord: Prior to repair, check the power cord and replace it if necessary.

5. Avoid using an extension cord, and avoid tapping into a power cord. This practice may result in malfunction or fire.

6. After completing repairs and reassembly, check the insulation resistance, Procedure: Prior to applying power, measure the resistance between the power cord and the ground terminal. The resistance must be greater than 30 megohms.

Fig. 1-1 Avoid Dangerous Contact

Fig. 1-2 No Tapping and No Extension Cords

7. Make sure that the grounds are adequate.

8. Make sure that the installation conditions are satisfactory. Relocate the unit if necessary.

9. Keep children away from the unit while it is being repaired.

10. Be sure to clean the unit and its surrounding area.

Fig. 1-3 No Kids Nearby!

Fig. 1-4 Clean the Unit

Samsung Electronics 1-1

2. Product Specifications

2-1 Table

Item

T ype Dimensions: (Width X Height X Depth) Packing Size (Width X Height X Depth) Voltage: Phase Frequency Operating Current Power Consumption Refrigerant Type Refrigerant Charge Cooling Capacity EER Net Weight Condenser Condenser Fan Evaporator Evaporator Fan Fan Motor Compressor(Rotary) Overload Protect Compressor Capacitor Fan Motor Capacitor Fan Speed Control Thermo Control OFF Timer

Unit of Measure

Volt

FREON

BTU/h

BTU/h.W

kg Row Type Row Type

Model

µF/ VAC µF/ VAC

AWH-1808ER(Cooling/Heating)

Window

660

X 420 X 695

X 476 X 794

737

220 - 240

Single

9.0 / 7.7

2,050 / 1,730

R-22

860

17,000 / 16,500

8.3 / 9.5 59

X 16

Propeller Fan

3 X 14

Blower

IC-13435SWJ5A

48B180JV1E7

MRA12016-12007

40 / 450 6 / 450

Fan speed switch (High & Low)

(DUAL)

Thermistor

Remarks

Samsung Electronics 2-1

2-2 Dimensions

660

420

695

2-2-1 Main Unit

Front view Side view

Unit : mm

2-2-2 Remote Control

Fan speed adjustment buttons

Temperature adjustment buttons

ON/OFF Buttons

Timer setting buttons Mode selection buttons

(COOL, HEAT, FAN) Air flow swing button

2-2 Samsung Electronics

3. Installation and Operating Instructions

3-1 Installation

When selecting the area for installing the unit, be sure to obtain approval of the customer.

1. Make sure that you install the unit in an area that provides good ventilation.

The air conditioner must not be blocked by any obstacle affecting the air flow near the air inlet and air outlet.

2. Make sure that you install the unit in an area which can endure the weight and vibration of the unit.

3. Make sure that you install the unit away from heat or vapor.

4. Make sure that you install the unit in an area where the cooled air can be evenly spread in a room.

5. Make sure that you install the unit in an area away from TVs, audio units, cordless phones, fluorescent lighting fixtures and other electrical appliances. (obtain a clearance of at least one meter)

Caution:

6. Make sure that you install the unit in an area which provides easy drainage for condensed water.

7. Make sure that you install the unit in an area not exposed to rain or direct sunlight. (Install a separate sunblind if exposed to direct sun-

light.)

8. Do not install the unit in an area subjected to noise or vibration amplification which may affect your neighbor. (Fix the unit firmly if mounted in a high place.)

Do not use the air conditioner in such areas as a greasy area(including machine oil), saline area(sea side), or sulphuric area(hot spring). When using the air conditioner in these areas, special maintenance is required. Contact your local dealer or our service center for advice.

Samsung Electronics 3-1

3-2 Function Description

Remote control sensor

Air swing button

Deice indicator

Operating mode indicators

(HEAT, FAN, COOL)

Mode selection button

ON/OFF button

Power indicator

Temperature/Timer settings Temperature indicator

Timer indicator Temperature adjusment button

Timer setting button Fan speed indicators

Fan speed adjust button

3-2-1 Cooling operation mode

The compressor is turned on and off according to the ambient temperature and set temperature.

1. Compressor on and off control

• Compressor on and off control according to the ambient temperature. The compressor is turned off when "ambient temperature = set temperature -1˚C"

The compressor is turned on when "ambient temperature = set temperature +1˚C"

2. Default value after power reset ➔set temperature = 24˚C

FAN SPEED = HIGH

3. Set temperature indicating (setting) range : 1˚C interval from 18˚C to 30˚C.

3-2-2 Heating operation mode

The compressor is turned on and off according to the ambient temperature and set temperature.

1. Compressor on and off control.

• Compressor on and off control according to the ambient temperature. The compressor is turned off when "ambient temperature = set temperature +1˚C"

The compressor is turned on when "ambient temperature = set temperature -1˚C"

2. Default value after power reset ➔set temperature = 24˚C

FAN SPEED = HIGH

3. Set temperature indicating (setting) range : 1˚C interval from 16˚C to 30˚C.

3-2-3 Fan operation mode

1. If "Fan operation mode" signal is received from remocon or panel.

➔ the compressor is immediately turned off and only fan motor is operated at set blowing speed. ➔ it changes such as "HIGH ➔ LOW ➔ HIGH"( if Fan speed is selected).

2. The initial FAN speed is set to "HIGH".

3. The set temperature can not be indicated and set.

3-2 Samsung Electronics

3-2-4 LED lamp and LED display indication in case of error detection

ERROR OPERADTION

ROOM THERMISTOR

(OPEN OR SHORT)

INDOOR PIPE THERMISTOR

(OPEN OR SHORT)

OUTDOOR PIPE THERMISTOR

(OPEN OR SHORT)

LED LAMP DISPLAY

COOL HEAT FAN

7-SEG

LED DISPLAY

E1 displayed E5 displayed

E6 displayed

Lamp blinking at every second (on for 0.5s and off for 0.5s)

LED lamp off

1. Set operation in case of error occurrence.

• Malfunction of each temperature sensor (open, short)

- Error mode display, warning sound.

- The operation status is off.

2. The "outdoor pipe thermistor" error mode carry out checking only during heating operation and do nor carry out checking during and "FAN" operation.

Samsung Electronics 3-3

3-2-5 Panel key operation

Key discription

Key name

ON/OFF Operation start and stop TACT

First ON = operation start, second ON = operation stop

Continuous operation is not available.

Mode Operation mode change (in case of model option heat pump) TACT

at every ON

- Selected as "COOL –> HEAT –> FAN". (Default=COOL)

If operation is OFF, it is considered as an invalid key.

Continuous operation is not available.

Fan speed Indoor fan speed setting.

At every ON -> selected as "HIGH -> LOW -> HIGH".

If operation is OFF, it is considered as an invalid key.

Continuous operation is not available.

Temp. Currently displayed set temperature circulation (in case of option -> ˚C) TACT

At every pressing, the set temperature is changed by 1˚C (cooling operation)

(24˚C -> 25˚C -> 26˚C -> 27˚C ---> 30˚C -> 18˚C -> 19˚C -> 20˚C ---> 24˚C). At every pressing, the set temperature is changed by 1˚C (heating operation)

(24˚C -> 25˚C -> 26˚C -> 27˚C ---> 30˚C -> 16˚C -> 17˚C -> 18˚C ---> 24˚C). Single and continuous operation is available.

In case of the set temperature of 30˚C, when the "increase" key is pressed by

remocon, temperature does not increase any more and waring, sound is generated.(cooling, heating operation) --> The panel key is circulated continuously. If operation is OFF, it is considered as an invalid key.

In case of fan speed operation, it is considered as an invalid key.

Currently displayed set temperature circulation (in case of option --> ˚F) At every pressing, the set temperature is changed by 1˚F (cooling operation)

(75˚F -> 76˚F -> 77˚F ---> 86˚F -> 64˚F -> 65˚F -> 66˚F -> 67˚F ---> 75˚F). At every pressing, the set temperature is changed by 1˚F (heating operation)

(75˚F -> 76˚F -> 77˚F ---> 86˚F -> 61˚F -> 62˚F -> 63˚F -> 64˚F---> 75˚F). Single and continuous operation is available.

In case of the set temperature of 86˚F, when the "increase" key is pressed by

remocon, temperature does not increase any more and warning, sound is generated.(cooling, heating operation) --> The panel key is circulated continuously. If operation is OFF or fan speed, it is considered as an invalid key.

Key operational function Key Type

Air swing Left and right swing motor operation and stop. TACT

Once ON = Left and right swing motor operation, Another ON = Left and right

swing motor stop. In case of cool blowing inhibition, it is considered as an invalid key.

(only in fan motor OFF range) In case of defrosting operation, it is considered as an invalid key.

(only in fan motor OFF range) Continuous operation is not available.

In case of operation stop, when the fan motor is turned off it is considered

as an invalid key. In case of deicing operation, the left and right swing motor does not operate.

(it operates when the fan motor is being operated)

Timer Time increase by the convenient reserve (OFF TIMER) time control key. TACT

At every pressing the time is increased by 1 hour.

(--> 01 -> 02 -> 03 -> 04 -> 05 ---> 18 -> 19 -> 20 -> 21 -> 24 -> --) "--" means that the convenient reserve time is not set yet.

(convenient reserve cancelled) Single and continuous operation is available.

If operation is OFF, it is considered as an invalid key.

3-4 Samsung Electronics

3-2-6 LED lamp operation specifications

LAMP name Operations specifications

ON Operation ON condition : ON

Operation OFF condition : OFF Blinking just after resetting : Automatic stop after turning on for 0.5 s and off for 0.5s for 3 minutes(if the operation/stop key is not pressed for 3 minutes).

COOL The mode is set to "COOL" –> ON

Others –> OFF

HEAT The mode is set to "HEAT" -> ON

Others –> OFF

FAN The mode is set to "FAN" –> ON

Others –> OFF

HIGH The fan speed is set to "HIGH" –> ON

Others –> OFF

LOW The fan speed is set to "LOW" –> ON

Others –> OFF

˚C The set temperature is displayed or set -> ON

Others –> OFF

HR During setting of the convenient reserve (OFF TIMER) time -> blinking

After setting of the convenient reserve (OFF TIMER) time -> ON Others –> OFF

DEICE Till the "deicing" operation is completed during heating opertion -> ON

Others –> OFF In case of (set) temperature display

-> NO. (1) 7 seg. LED display indicates temperature of the tens digit (˚C, ˚F)

-> NO. (2) 7 seg. LED display indicates temperature of the units digit (˚C, ˚F) In case of time (OFF TIMER) display

(1) (2)

-> NO. (1) 7 seg. LED display indicates time of the tens digit

-> NO. (2) 7 seg. LED display indicates time of the units digit

Samsung Electronics

3-5

3-2-7 Resistor and voltage values table of room thermistor, indoor thermistor and

outdoor thermistor for each temperature

Temperature

[˚C]

70 69 68 67 66 65 64 63 62 61 60

59 58 57 56 55 54 53 52 51 50

49 48 47 46 45 44 43 42 41 40

39 38 37 36 35 34 33 32 31 30

THERMISTOR

[Kohm]

1.670

1.729

1.791

1.855

1.922

1.992

2.065

2.141

2.220

2.303

2.390

2.480

2.574

2.672

2.775

2.882

2.994

3.111

3.234

3.362

3.496

3.635

3.780

3.932

4.091

4.257

4.432

4.614

4.806

5.007

5.217

5.438

5.669

5.912

6.167

6.435

6.716

7.012

7.322

7.649

7.993

Voltage

[DC V]

0.715

0.737

0.759

0.782

0.806

0.830

0.855

0.881

0.908

0.936

0.964

0.993

1.023

1.054

1.086

1.118

1.152

1.186

1.221

1.258

1.295

1.333

1.371

1.411

1.451

1.493

1.535

1.578

1.623

1.668

1.741

1.761

1.809

1.857

1.907

1.957

2.008

2.060

2.113

2.167

2.221

Temperature

[˚C]

29 28 27 26 25 24 23 22 21 20

19 18 17 16 15 14 13 12 11 10

9 8 7 6 5 4 3 2 1 0

-1

-2

-3

-4

-5

-6

-7

-8

-9

-10

THERMISTOR

[Kohm]

8.354

8.734

9.135

9.556

10.00

10.46

10.94

11.45

11.99

12.55

13.15

13.78

14.44

15.14

15.88

16.66

17.48

18.36

19.28

20.25

21.28

22.38

23.54

24.76

26.06

27.44

28.90

30.45

32.10

33.85

35.66

37.59

39.64

41.82

44.14

46.60

49.22

52.01

54.98

58.14

Voltage

[DC V]

2.275

2.331

2.387

2.443

2.500

2.556

2.612

2.669

2.726

2.782

2.840

2.897

2.954

3.011

3.068

3.124

3.180

3.237

3.292

3.347

3.401

3.455

3.509

3.561

3.613

3.664

3.714

3.763

3.812

3.859

3.904

3.949

3.992

4.035

4.076

4.116

4.155

4.193

4.230

4.266

3-6

Samsung Electronics

3-2-8 About the safety devices

1. High temperature release : If temperature of the indoor pipe thermistor increases over the specified value during heating operation, following operation is carried out for safety of the equipment.

A condition : temperature of indoor pipe thermistor is below 47˚C B condition : temperature of indoor pipe thermistor is between 58˚C and 63˚C C condition : temperature of indoor pipe thermistor is over 63˚C

1) High temperature release operation OFF condition = A condition

-> compressor ON (only in THERMO ON condition)

-> fan motor speed = set fan speed and cool blowing inhibiting operation

2) High temperature release operation ON condition = B condition

-> compressor ON

-> fan motor speed = HIGH operation if it was LOW = HIGH operation if it was HIGH

3) High temperature release operation ON condition = C condition

-> fan motor speed = set fan speed

-> compressor OFF

2. Low temperature release : If temperature of the indoor pipe thermistor decreases below the specified value during cooling operation, following operation is carried out for safety of the equipment.

A condition : temperature of indoor pipe thermistor is below -1˚C for more than 6 minutes B condition : temperature of indoor pipe thermistor is over 5˚C

1) Low temperature release ON condition = A condition

-> compressor OFF

-> fan motor "set fan speed"

2) Low temperature release OFF condition = B condition

-> The compressor is turned on if ON condition is satisfied after comparing the ambient temperature with the set temperature

-> fan motor "set fan speed"

[Detailed description]

1) If temperature of indoor pipe thermistor is below -1˚C for more than 6 minutes, the fan motor continues to operate at the set fan speed and the compressor is turned off(Low temperature release operation)

2) If temperature of the indoor pipe thermistor increases over +5˚C during low temperature release operation, normal operation is recovered : compressor ON, fan mtor set fan speed -> Low temperature release operation OFF

3) If temperature of indoor pipe thermistor increases over 0˚C during counting 6 minutes below -1˚C, the counter is reset.

Samsung Electronics 3-7

3. Deicing operation : If temperature of the outdoor pipe thermistor decreases below the specified value during heating operation, following operation is carried out for safety of the equipment.

OUTDOOR PIPE

Thermistor temperature (A-Condition)

12[˚C]

100min below

-4[˚C]

100min COUNT ON

100min COUNT OFF

OUTDOOR PIPE

Thermistor temperature (B-Condition)

12[˚C]

30min below

-6[˚C]

30min COUNT ON

30min COUNT OFF

OUTDOOR PIPE

Thermistor temperature (C-Condition)

12[˚C]

100min COUNT ON

30min COUNT ON

ON OFF

100min

5min

30min 5min

OFF

10min below

-8[˚C]

10min COUNT ON

10min COUNT OFF

10min COUNT ON

ON OFF

10min 5min

3-8 Samsung Electronics

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