SAMSUNG AM26A1B2 Service Manual

ROOM AIR CONDITIONER

INDOOR UNIT	OUTDOOR UNIT
AM24A1(B1)E12	UM24A1(B1)E2
AM26A1(B1)B13	UM26A1(B1)B2

SERVICE Manual

AIR CONDITIONER

CONTENTS

1. Precautions

2. Product Specifications

3. Operating Instructions and

Installation

4. Disassembly and Reassembly

5. Troubleshooting

6. Exploded Views and Parts List

7. Block Diagrams

8. PCB Diagrams

9. Wiring Diagrams

10. Schematic Diagrams

©Samsung Electronics Co., Ltd. DEC. 1998. Printed in Korea.

Code No. DB81-10172A(2)

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 them. Using defective tools or test equipment may cause problems later-intermittent 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.

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. 1-1 Avoid Dangerous Contact

Fig. 1-2 No Tapping and No Extension Cords

Fig. 1-3 No Kids Nearby!

Fig. 1-4 Clean the Unit

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M E M O

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2. Product Specifications

2-1 Table

					Model	AM24A1(B1)E2		AM26A1(B1)B2
						INDOOR UNIT	OUTDOOR UNIT	INDOOR UNIT	OUTDOOR UNIT
	Item					AM24A1(B1)E12	UM24A1(B1)E2	AM26A1(A1)B13	UM26A1(B1)B2
	Type						Wall-Mounting Multi Split
		Cooling			BTU/h	12,000	24,000(12,000x2)	12,000	24,000(12,000x2)
	Perfor-	Dehumiditying			I/h	1.9	-	1.9	-
		Air volume Cooling			m3/min	8.5	-	8.5	-
	mance
		Noise		Cooling	dB	38	56	38	56
		Power			V-Hz	1-220-240V~. 50Hz		1-220V~ 60Hz
		Power Consumption		Cooling	W	1,230	2,460(1,230x2)	1,360	2,720(1,360x2)
		Operating Current		Cooling	A	5.3	10.6(5.3x2)	6.3	12.6(6.3x2)
		Power factor		Cooling	%	96.7		98.1
	Power	Starting current			A		30
		Power cord(Option)				-	H07RNF2.5	-	H07RNF2.5
						H05RNF(5G 1mm2)		H05RNF(5G 1mm2)
		Fuse capacity			A	3.15	-	3.15	-
		Outer		W x H x D	mm	815x298x182	1000x790x310	815x298x182	1000x790x310
		dimension			inch	32.08x11.73x7.17	39.37x31.10x12.2	32.08x11.73x7.17	39.37x31.10x12.2
		Weight			kg	9.6	67	9.6	67
		Refrigerant pipe		Liquid		ø6.35x5		ø6.35x5
				Gas	OD(mm)xL(m)	ø12.7x5		ø12.7x5
		Drain hose			ID(mm)xL(m)		ø17x2,000
	Size		Type			-	Rotary	-	Rotary
		Com-	Model name			-	48A124JV1E5	-	48A135IV1E5
			Capacitor			-	30µF x 420VAC	-	25µF x 450VAC
		pressor
			Motor	Type(model)		-	-	-	-
				Rated output	W	-	1210	-	1210
			Type			Cross-fan	Propeller	Cross-fan	Propeller
		Blower
			Motor	Type		Resin	Still	Resin	Still
				Rated output	W	35	60	35	60
	Heat exchanger					2Row 12Step	2Row 30Step	2Row 12Step	2Row 30Step
	Refrigerant control unit						A,B-UNIT : Capillary Tube
	Freezer oil capacity				cc	-	410	-	410
	Refrigerant to change(R-22)				g	-	830x2	-	800x2
	Protection device					-	MRA12030-12008	-	MRA12002-9200
	Standard Conditions					ISO R5151 Standard		ARI Standard

•The basic performance test is based on the piping of 5MT. (Be sure to check the installing conditions as extension of the piping

may lead to performance degradetion.)
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2-2 Dimensions

2-2-1 Indoor Unit

(Remote control)

(Front view)

Air

in

815

182

58

22

Air out

Installation plate

(Rear view)

2-2-1 Outdoor Unit

(Front view)

(Rear view)

660

1000

335

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2-3 Refrigerating Cycle Block Diagram

INDOOR UNIT

OUTDOOR UNIT

T1

Capillary tube

2-way valve

(A)

(B)

Liquid side

Heat exchanger (Evaporator)

	Compressor-B
Heat	T2
exchanger	Gas side
(Evaporator)
	3-way valve
	Compressor-A

Cooling

Gas leak check point

Refrigerating cycle temperature and pressure

			STD Pressure	Piping Temp.(˚C)				Temp. Condition(˚C)
	Operating Condition		(kg/cm2G)	T1	T2		Indoor		Outdoor
			3-way valve			DB		WB	DB	WB
		Standard	5.0~5.2	11	11	27		19	35	24
	A or B	Max over load	6.0~6.3	16	15	32		23	43	26
Cooling		Low temp.	3.4~3.6	3	2	21		15	21	15
		Standard	5.0~5.2	12	10	27		19	35	24
	A + B	Max over load	6.0~6.3	16	15	32		23	43	26
		Low temp.	3.4~3.6	3	2	21		15	21	15

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M E M O

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3. Operating Instructions and Installation

3-1 Operating Instructions

3-1-1 Name & Function of Key in remote controller

NO			NAMED OF KEY				FUNCTION OF KEY
1					On/Off Button. Use this button to start and stop air conditioner.
2				(UP)	Temp. up button. If the		button is pressed once,
					the setting temperature is increased by 1°C
				(DOWN)	Temp. down button. If the		button is pressed once,
					the setting temperature is decreased by 1°C
3					Each time you press this button,
		MODE			MODE is changed in the following order.
4		TURBO			Use this button to provide heavy duty cooling & Heating for 30 minutes.
5		OFF			Set up the reserve or cancel the timer on and timer off quickly
6					Use this button for sleep operation.
					(The SLEEP mode can be selected at COOL and HEAT mode.)
7					Adjusts air flow vertically.
					Each time you press this button,
8					Each time you press this button,
					FAN SPEED is changed in the following order.
9	C		ON TIMER		Set up the time that operation start.
	O
10
	V		OFF TIMER		Set up the time that operation stop.
	E
11	R		SET		Use this button to reserve the timer on.
		T
12			CANCEL		Use this button to reserve or cancel the timer on and timer off.
		I
		M
13
		E		(UP)	If the	button is pressed once, the time increase by one minute
		R			during the time set mode, and ten minutes during the timer set mode.
14				(DOWN)	If the	button is pressed once, the time decrease by one minute
					during the time set mode, and ten minutes during the timer set mode.
15					Without regard to ON/OFF condition in remote controller,
			TIME		use this button to set current time.
					Adjust the current time using			button.
					(Data can be transmitted after setting up the time)

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Operating Instructions and Installation

3-1-2 Name & Function of Key in remote controller

1. AUTO MODE : In this mode, operation COOL mode is selected automatically by the room temperature of initial operation.

Operation Type		Room Temp
Cool Operation		Tr³ 24.5°C+DT	Compressor ON
		Tr£ 24°C+DT	Compressor OFF

DT= -2°, -1°C, 0°C+1°C+2°C

DT is controlled by setting temperature up/down key of remote controller

* FAN SPEED : AUTO

2. COOL MODE : The unit operates according to the difference between the setting and room temperature. (18°C~30°C)

3. DRY MODE : Has 3 states, each determined by room temperature.

The unit operates in DRY mode. *Compressor ON/OFF Time is controlled compulsorily(can not set up the fan speed, always breeze).

*Protective function : Low temperature release. (Prevention against freeze)

4.TURBO MODE : This mode is available in AUTO, COOL, DRY, FAN MODE.

When this button is pressed at first, the air conditioner is operated “powerful” state for 30 minutes regardless of the set temperature, room temperature.

When this button is pressed again, or when the operating time is 30 minutes, turbo operation mode is canceled and returned to the previous mode.

*But, if you press the TURBO button in DRY or FAN mode that is changed with AUTO mode automatically.

5.SLEEP MODE : Sleep mode is available only in COOL mode.

The operation will stop after 6 hours.

*In COOL mode : The setting temperature is automatically raised by 1°C each 1hour When the temperature has been raised by total of 2°C, that temperature is maintained.

6.FAN SPEED : Manual (3 step), Auto (4 step) Fan speed automatically varies depending on both the difference between setting and the room temperature.

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OFF TIMER

7.COMPULSORY OPERATION :

For operating the air conditioner without the remote controller.

*AUTO : The operating is the same function that AUTO MODE in the remote controller.

8.SWING : BLADE-H is rotated vertically by the stepping motor.

9.Quick OFF TIMER: OFF timer (quick timer) allows reservation or cancel the timer on and timer off quickly

When OFF timer button is pressed at operating state, LCD displays the polling state sequentially.

The LCD also displays the time remaining.

10.24-Hour ON/OFF Real Setting Timer. : The air conditioner is turned ON at a specified time using ON TIMER .

Operating Instructions and Installation

OFF TIMER : The air Conditioner is turned OFF at a specified time using . *ON TIMER : Only timer LED lights on.

*OFF TIMER : Both timer and operation LED lights on.

*3 minutes delay timer.

	11.	SELF Diagnosis
	LED DISPLAY			Check Point
	oper-	TIMER FAN Turbo
	ation

Interruption of electric power and Power on.

Abnormal condition of the room sensor.

Abnormalconditionoftheindoorunit'sheatexchangersensor.

Indoor unit fan motor lock.

: LED	: LED off
blinking

12.BUZZER SOUND : Whenever the ON/OFF button is pressed or whenever change occurs to the condition which is set up or select, the compulsory operation mode, buzzer is sounded "beep"

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3-2 Installation

3-2-1 Selecting Area for Installation

Select an area for installation that is suitable to the customer's needs.

3-2-1(a) Indoor Unit

1.Make sure that you install the indoor unit in an area providing good ventilation. It must not be blocked by an obstacle affecting the airflow near the air inlet and the air outlet.

2.Make sure that you install the indoor unit in an area allowing good air handling and endurance of vibration of the indoor unit.

3.Make sure that you install the indoor unit in an area where there is no source of heat or vapor nearby.

4.Make sure that you install the indoor unit in an area from which hot or cool air is spread evenly in a room.

5.Make sure that you install the indoor unit in an area away from TVs, audio units, cordless phones, fluorescent lighting fixtures and other electrical appliances (at least 1 meter).

6.Make sure that you install the indoor unit in an area which provides easy pipe connection with the outdoor unit, and easy drainage for condensed water.

7.Make sure that you install the indoor unit in an area which is large enough to accomodate the measurements shown in figure on the next page.

3-2-1(b) Outdoor Unit

1.Make sure that you install the outdoor unit in area not exposed to the rain or direct sun light.

(Install a separate sunblind if exposed to direct sun light.)

2.Make sure that you install the outdoor unit in area allowing good air moment, not amplifying noise or vibration, especially to

avoid disturbing neighbours.

(Fix the unit firmly if it is mounted in a high place.)

3.Make sure that you install the outdoor unit in area providing good ventilation and which is not dusty. It must not be blocked by any obstacle affecting the airflow near the air inlet and the air outlet.

4.Make sure that you install the outdoor unit in area free from animals or plants.

5.Make sure that you install the outdoor unit in area not blocking the traffic.

6.Make sure that you install the outdoor unit in area easy to drain condensed water from the indoor unit.

7.Make sure that you install the outdoor unit in area which provides easy connection within the maximum allowable length of a coolant pipe (10 meters).

Note

1.Add 10 grams of refrigerant (R-22) for every 1 meter if the pipe length exceeds the standard pipe length of 5 meters.

2.Maintain a height between the indoor and outdoor units of less than 3 meters.

8.Make sure that you install the outdoor unit in an area which is large enough to accommodate the measurements

shown in figure on the next page.

3-2-1(c) Remote Control Unit

1.Make sure that you install the remote control unit in an area free from obstacles such as curtains etc, which may block signals from the remote control unit.

2.Make sure that you install the remote control unit in an area not exposed to

direct sunlight, and where there is no source of heat.

3.Make sure that you install the remote control unit in an area away from TVs, audio units, cordless phones, fluorescent lighting fixtures and other electrical appliances (at least 1 meter).

Caution

It is harmful to the air conditioner if it is used in the following environments: greasy areas (including areas near machines), salty areas such as coast areas, areas where sulfuric gas is present such as hot spring areas. Contact your dealer for advice.

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Operating Instructions and Installation

3-2-2 Installation diagram of indoor unit and outdoor unit

A Indoor unit gas leak test check point			Piping may be laid to the rear, left,
			right or down .
Indoor unit	3
			Right		Left
	2		Rear	Down	Rear
Piping
1	Tape vinyl

B Drain hose installation

Cut the piping hole sloped slightly

Remote control

Remote control holder

1	Piping (Liquid) 1/4"	6	Clamper tube
2	Piping (Gas) 1/2"	7	Installation plate
3	Installation tube	8	Pipe-connection
4	Vinyl tape	9	Screw
5	Putty	10	Drain hose

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Operating Instructions and Installation

3-2-2(a) Fixing the Installation Plate

Installation plate

Pipe hole (ø65mm)

(Unit : mm)

280

340

1.Determine the position of the pipe and drain hose hole using the right figure and drill the hole with an inner diameter of 65mm so that it slants slightly downwards.

2.If you are fixing the indoor unit to a… Then follow Steps…

Wall	3.
Window frame	4 to 6.

3.Fix the installation plate to the wall in a manner appropriate to the weight of the indoor unit.

If you are mounting the plate on a concrete wall with anchor bolts, the anchor bolts must not project by more than 20mm.

(Unit : mm)

3-2-2(b) Purging the Unit

4.Determine the positions of the wooden uprights to be attached to the window frame.

5.Attach the wooden uprights to the window frame in a manner appropriate to the weight of the indoor unit.

6.Using tapped screws, attach the installation plate to the wooden uprights, as illustrated in the last figure opposite.

On delivery, the indoor unit is loaded with an inert gas. All this gas must therefore be purged before connecting the assembly piping. To purge the inert gas, proceed as fol - lows.

Unscrew the caps at the end of each pipe.

Result : All inert gas escapes from the indoor unit.

•To prevent dirt or foreign objects from getting into the pipes during installation, do NOT remove the caps completely until you are ready to connect the piping.

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Operating Instructions and Installation

3-2-2(c) Connecting the Assembly Cable.

The outdoor unit is powered from the indoor unit via the assembly cable. If the outdoor unit is more than five metres away from the indoor unit, the cable must first be extended to a maximum of

ten metres.

1.Extend the assembly cable if necessary.

2.Open the front grille by pulling on the tabs on the lower right and left sides of the indoor unit.

3.Remove the screw securing the connector cover.

4.Pass the assembly cable through the rear of the indoor unit and connect the assembly cable to terminals 1 to 5.

• Each wire is labelled with the corresponding terminal number.

5.Pass the other end of the cable through the 65mm hole in the wall.

6.Replace the connector cover, carefully tightening the screw.

7.Close the front grille.

8.For further details on how to plug the other end of the assembly cable into the outdoor unit, refer to page 3-10.

3-2-2(d) Installing and Connecting the Indoor Unit Drain Hose

Care must be taken when installing the drain hose for the indoor unit to ensure that any condensa - tion water is correctly drained outside.l When passing the drain hose through the 65mm hole drilled in the wall, check that none of the following situations occur.

The hose must	The end of the drain		Do NOT bend the		Keep a clearance of at
NOT slope upw	hose must NOT be		hose in different		least 5cm between the
ards.	placed in water.		directions.		end of the hose and the
					ground.

Do NOT place the end of the drain hose in a hollow.

To install the drain hose, proceed as follows.

1.If necessary, connect the 2-metre extension to the drain hose.

2.If you are using the extension, insulate the inside part of the extension drain hose with a shield.

3.Pass the drain hose under the refrigerant piping, taking care to keep the drain hose tight.

4.Pass the drain hose through the hole in the wall, making sure that it is sloping downwards, as shown in the illustrations above.

Shield

Drain hose

Extension drain hose

The hose will be fixed permanently into position once the whole installation has been tested for gas leaks; refer to page 16 for further details.

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Operating Instructions and Installation

3-2-2(e) Outdoor unit installation

GAS LEAK TEST

Outdoor unit check point

Indoor unit check point

Check for gas leak from the flare nut connections with leak detector.

WIRING CONNECTION

Two electric cables must be connected to the outdoor unit:

•The assembly cable connecting the indoor unit to the outdoor unit.

•The power cable connecting the auxiliary circuit breaker to the outdoor unit.

1Remove the terminal board cover on the side of the outdoor unit.

2Connect the assembly cable to terminals 1 to 5 and connect the power cable to therminals A to B.

Each wire is labelled with the corresponding terminal number.

Ensure that the wire number of the indoor unit and the terminal number of the outdoor unit.

3 Connect the earthing wires to the earth terminals.

Refer to the page opposite for further details on how to check that earthing is correct.

4Replace the terminal board cover, carefully tightening the screw.

5connect the power cable to the auxiliary circuit breaker.

		Indoor unit
	Outdoor unit	4	3	2	1	3	4	1(L) 2(N)	Terminal Block
		FAN	COMP	(N)	(L)	COMP	FAN
									Earth
									terminal
									Circuit Breaker
									(Main Power cable)
					Earth				Earth
					terminal				terminal

A-unit

B-unit

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