Friedrich MR24Y3F, MW24Y3F, MR24C3F Service Manual

SPLIT TYPE
ROOM AIR CONDITIONER

WALL MOUNTED

Models

Indoor unit Outdoor unit

MW24C3F MR24C3F
MW24Y3F MR24Y3F

type

CONTENTS

SPECIFICATIONS ................... 1

DIMENSIONS ....................... 2

REFRIGERANT SYSTEM DIAGRAM .... 3

CIRCUIT DIAGRAM ................. 4

5INDOOR PCB CIRCUIT DIAGRAM .....

8OUTDOOR PCB CIRCUIT DIAGRAM . . .

ERROR CONTENTS ................

DISASSEMBLY ILLUSTRATION ....... 14

PARTS LIST ....................... 20

STANDARD ACCESSORIES

..........

13

22

SPECIFICATIONS

INDOOR UNIT

OUTDOOR UNIT

COOLING CAPACITY

HEATING CAPACITY

MW24C3F MW24Y3F

MR24C3F MR24Y3F

24,200 BTU/hr 24,200 BTU/hr

- 27,600 BTU/hr

NOISE LEVEL

INDOOR UNIT

HIGH

MED

LOW

QUIET

47 dB

41 dB

36 dB

32 dB

C47dB / H45dB

C41dB / H41dB

C36dB / H36dB

C32dB / H32dB

ELECTRICAL DATA

POWER SOURCE

FREQUENCY

COOLING

RUNNING CURRENT

HEATING

COOLING

INPUT WATTS

HEATING

SEER

MOISTURE REMOVAL

AIR CIRCULATION -High

COMPRESSOR

TYPE

208 V / 230 V 208 V / 230 V

60Hz 60Hz

10.1 A 10.1 A

- 10.8 A

2,310 W

- 2,470 W

18.0 18.0

6.3 Pts/hr
(3.0 L/hr)

647 cfm

(1,100 m

3

/hr)

Hermetic motor compressor,

4 poles, Involute scroll type

2,310 W

6.3 Pts/hr
(3.0 L/hr)

647 cfm

(1,100 m3/hr)

OUTDOOR UNIT

52 dB

C52dB / H53dB

REFRIGERANT CHARGE (R410A)

Pipe Length

FULL CHARGE
AMOUNT

ADDITIONAL CHARGE

15 m

20 m

25 m

30 m

3 lb. 8 oz. (1,600 g)

3 lb. 12 oz. (1,700 g)

3 lb. 15 oz. (1,800 g)

4 lb. 3 oz. (1,900 g)

0.2 oz./ft. (20g/m)

DISCRIMINATION

POWER SOURCE

REFRIGERANT R410A

FAN MOTOR

POWER SOURCE

INDOOR UNIT

OUTDOOR UNIT

DIMENSIONS

INDOOR UNIT HxWxD

OUTDOOR UNIT

HxWxD

HIGH

MED

LOW

QUIET

COOL

HEAT

5CS160 XAA23

208 V / 230 V 60Hz

3 lb. 8 oz ( 1,600 g )

208 V / 230 V

1,310 r.p.m.

1,120 r.p.m.

940 r.p.m.

830 r.p.m.

1,000 r.p.m.

-

12-5/8 x 39-1/4 x 9 inch

320 x 998 x 228 mm

22-3/4 x 31-1/8 x 12-3/8 inch

578 x 790 x 315 mm

1,000 r.p.m.

1,050 r.p.m.

WEIGHT

INDOOR UNIT

OUTDOOR UNIT

Gross / Net

Gross / Net

2006.03.14 1

40 / 31 lbs. (18 / 14 kg )

106 / 97 lbs. (48 / 44 kg )

OUTLINE AND DIMENSIONS

Unit : inch (mm)

INDOOR UNIT

12-5/8"

(320)

OUTDOOR UNIT

39-1/4" (998)

13-11/16" (347)

1-7/8" (48)

23-1/4" (540)

31-1/8" (790)

20" (508)

3/4" (20)

9" (228)

12-5/8" (320)

4-15/16" (125)

2-3/8"
(60)

11-13/16" (300)

2006.02.23

22-3/4" (578)

3/8"

(10)

2

REFRIGERANT SYSTEM DIAGRAM

Models :

Muffler

MW24C3F / MR24C3F
MW24Y3F / MR24Y3F

3-Way

valve

Compressor

4-Way valve

Heat exchanger

( INDOOR )

2-Way

valve

Strainer

Sub-accumulator

Strainer

Cooling
Heating

Refrigerant pipe diameter
Liquid : 1/4" (6.35 mm)
Gas : 5/8" (15.88 mm)

Heat exchanger

( OUTDOOR )

Expansion valve

Strainer

2006.02.23 3

CIRCUIT DIAGRAM

2004.11.09 4

INDOOR PCB CIRCUIT DIAGRAM

Models :
MW24C3F
MW24Y3F

TERMINAL BOARD

N

N

OUTDOOR

UNIT

L

SERIAL

EARTH

THERMAL

L

FUSE 103

3

EARTH TERMINAL

GREEN

W4 TM2

22007

RED WHITE BLACK

TM4

TM1

22007

22007

CONTROL UNIT
MW24C3F : EZ-005CWSE
MW24Y3F : EZ-00523HSE

INDICATOR PCB ASSY

K05CY-0500HSE-D0

LOUVER
( RIGHT / LEFT )

LOUVER
( UP / DOWN )

DIFFUSER

FAN MOTOR

M

M

M

F. M .

CN2-1 RED

CN2-2 ORANGE

CN2-3 YELLOW

CN2-4 PINK

CN2-5 BLUE

CN5-1 RED

CN5-2 ORANGE

CN5-3 YELLOW

CN5-4 PINK

CN5-5 BLUE

CN8-1 RED

CN8-2 ORANGE

CN8-3 YELLOW

CN8-4 PINK

CN8-5 BLUE

CN10-6 RED

CN10-4 BLACK

CN10-3 WHITE

CN10-2 YELLOW

CN10-1 BLUE

CN6
5P-SAN

1

2

3

4

5

CN2
SJH20-05WS

1

2

3

4

5

CN5
SJH20-06WS

1

2

3

4

5

CN8
B06B-PASK

1

2

3

4

5

CN10
B06B-XARK

1

2

3

4

5

6

CONTROLLER PCB ASSY

MW24C3F : K05CX-0507WSE-C1

MW24Y3F : K05CX-0506HSE-C1

CN11

B07B-9ASK

CN3

2P-SCN

CN1

2P-SAN

CN13

B5P-SHF-1AA

CN201
JB20-07HG

1

2

3

4

5

6

7

CN11-1 RED

CN11-2 WHITE

CN11-3 WHITE

CN11-4 WHITE

CN11-5 WHITE

CN11-6 WHITE

CN11-7 WHITE

1

2

3

4

5

6

7

PIPE TEMPERATURE THERMISTOR

BLACK

CN3-1

1

CN3-2 BLACK

2

ROOM TEMPERATURE THERMISTOR

CN1-1 BLACK

1

CN1-2 BLACK

2

CN13-1

1

2

CN13-2

3

CN13-1

CN13-1

4

CN13-1

5

TEST

2006.02.23 5

Models :
MW24C3F
MW24Y3F

ROOM TEMPERATURE

PIPE TEMPERATURE

REMOTE CONTROL UNIT

1

3

<RED>
<WHITE>

<BLACK>

JP SWITCHING

K1-4

T1-12

TM4

C19
330/
25V

CN1

(2)

TM1

CN3

CONTROLLER PCB ASSY

MW24C3F : K05CX-0507WSE-C1

MW24Y3F : K05CX-0506HSE-C1

C33
33/
35V

D4
D1FL20U

CS

(75)

C34

0.1

<F>

15V

4

3

(100)

MY064

6
5
4
3
2
1

0.01 <F>

VA2

470V

<TNR>

4

3

PS2501L-1

I C1-76
I C1-75
I C1-74
I C1-73

I C1-6

I C1-4
I C1-64
I C1-63

R113 47

<1/10W>

R51 1.0K

<1/4W>

1%

<1/4W>

5V

R47 10K

<1/10W>

4

3

PS2501L-1

<KD / KE>

T2

D12 D2F20U
D10 D1FL20U

8
9

10

C35

VA3

470V

<TNR>

1

2

R64

1.8K

<1/10W>

I C15

<KD / KE>

uLN2003

I C1-43
I C1-42
I C1-41
I C1-40
I C1-39
I C1-38

R1
100K
<1/10W>

3

2

1

X1

8.38MHz

<CSTLS>

R9

0R0

RESET

R110 10K

<1/10W>

THE CIRCUIT FOR FAN MOTERS

C36

100/36V

+

R55

820

A

A

15V

1

2

I C14

R56

4.7K

<1/10W>

R63 6.8K

<1/4W>

R67
150

<1/10W>

3

0.1 <F>

C

C37

1

+

820/

REF

A

2

25V

I C19
TL431 I LPR

I C18-5

512

IC1

uPD780148

44

P00

VDD

P01

43

EVDD

P02

42

P50

P03

41

P51

P04

P52

40

P05

39

P53

38

P06

P54

18

P10

P55

P11

19

P56

P12

20

P57

P13

21

P60

P14

22

P61
P62

P15

23
24

P63

P16

25

P17

P64

80

P20

P65

79

P21

P66

P22

78

P67

P23

77

P70

P24

76

P71

75

P25

P72

74

P26

P73

73

P27

P74

7

P30

P75

6

P31

P76
P77

5

P32

4

P33

P120

64

P130

P40

63

P140

P41

62

P141

P42

P142

61

P43

60

P143

P44

59

P144

P45

58

P46

P145

57

P47

AVREF

14

RST*

IC

X1

12

REGC

13

X2

GND

AGND

15

XT1

16

XT2

EGND

C53

1000P

<R>

C1

0.1

15V

<HCP>

1.2K

<1/10W>

C38

R65 330
<1/10W>

9
31
56
55
54

53
52
51
50
49
33
32
29
28

48
47
46
45
72
71
70
69
68
67
66
65

3
17
26
27

34
35
36
37

1

8
10
11

2
30

LED

(15)

(14)

A

(13)

(12)

R70

R53

5.6K

<1/10W>

5V

1

2

5V

C40
100/
16V

340V

(11)

12V

R48
34K
<1/10W>

R76 7.87K
<1/10W>
1%

I C17

PS2501L-1

<KD / KE>

ALAM
RC

I C1-28

I C1-47
I C1-46

I C1-3
CS

VPP

5V

(65)

(66)
(67)

(68)
(69)
(70)
(71)

+

T1-12

20V

(18)

C39
100/
35V

4

3

R72 100K <1/10W>

A

BEN

5V

R7 100K
<1/10W>

CN11

7

6

5

4

3

2

1

C41

0.01
<B>

DC FAN

CN10

6

5

4

3

2

1

R79, R81 - R84

10K <1/10W> x 5

I C1-76

I C1-42

I C1-41

I C1-75

I C1-74

15V LINE ON-OFF CONTROL

C25

0.1

<F>

+

JM9

132123IO

R77 10K
<1/10W>

R78 10K
<1/10W>

6

1

16

2

C59 0.1 <F>

C47 0.1 <F>
C48 0.1 <F>
C49 0.1 <F>

I C1-4

MANUAL AUTO SWITCH

5V

R32 10K
<1/10W>

(74)

(73)

SW1

THE SWITCH FOR OPENING
AND CLOSING OF A PANEL

5V

R115

(79)

10K

1

<1/10W>

2

(78)

CN20

5V

JM5

JM6

JM7

JM8

JM10

JP SETTING

I C20

78M15

G

Q9

C42
330/
25V

2SA1036(R)

R8 1.0K <RS - 2W>

11

I C18-6 uLN2003

I C18-1 uLN2003

15

I C18-2 uLN2003

314

4

R33 1.0K

<1/10W>

R116 1.0K

<1/10W>

AUTO RESTART / PLUG ON

TEMPERATURE CORRECTION-1

TEMPERATURE CORRECTION-2

REMOTE CONTROL SWITCHING-1

REMOTE CONTROL SWITCHING-2

C56

0.1
<F>

POWER RELAY

15V

+

(20)

(19)

I C18-3 uLN2003

I C18-4 uLN2003

13

413

12

5

611

I C16-4 uLN2003

710

5V

R90 - R93
330 <1/10W> x 4

OUTSIDE COMMUNICATION

I C1-40

C28

0.01
<B>

I C1-64

I C1-63

I C1-39

C55

0.01
<B>

OFGERING POWER

K1-4

DW12D1

4

1

14

3

I C7-6 uLN2003

10

7

1

I C16-3 uLN2003

I C16-5 uLN2003

I C16-6 uLN2003

R95 10K <1/10W>
R97 10K <1/10W>
R98 10K <1/10W>
R99 10K <1/10W>

(31)

1

(32)

2

(33)

3

4

(34)

5

(35)

CN13

R88 1.0K

<1/10W>

I C7-2

uLN2003

2

15

(3)

TM2

I C1-6

C50

0.01
<B>

<1/10W>

I C1-47
I C1-46

W3

(4)

12V

K1

3

2

I C7-3 uLN2003

4

I C7-4 uLN2003

51312

I C7-7 uLN2003

16

I C16-1 uLN2003

215

I C16-7 uLN2003

TEST

G5N-1A

243

18

8

<TNR>

5V

R105
10K
<1/10W>

R103

390

ABNOMAL VOLTAGE DETECTOR

I C1-38

I C7-5 uLN2003

6

I C16-2 uLN2003

14

3

(101)

PS2561L-1-V

4

32

R94 330
<1/10W>

K10

1

POWER SUPPLY CIRCUIT

280V

W5

TH1

5D-11

150/

315V

1

2

4

D6

FH1

F1

<TNR>

I C26-14

FH2

VA1

470V

I C26-10

C8 0.47
275V

C14 0.01

250V

C13 0.01
250V

L1

4

3

T1

0.7A - 5.0MH

GS I B460L

1

2

(1)

VA4

C12

0.1
<F>

470V

<TNR>

<TNR>

C17

+

330/
25V

VA5

470V

5V

(76)

C21

C20

C18

+

10/
25V

0.1
<F>

0.1
<F>

(97)

C22

+

0.1
<F>

JM3

(96)

7V

IC2

NJM7805

123

IO

G

R45 100K

C6

<RS - 2W>

3

+

IC8

TOP243

6

D
F

5

S

43

R34 6.8K

<1/10W>

A

1

C

2

L
X

<ECQE>

R46

47

<1/2W>

R38
15K

<1/10W>

D7

1NH42

C32

0.01

Q7

2SA1037AK

<Q>

C27

+

47/

16V

20V

C4

100P

<D>

1SS355

1

2

3

C29

0.1

<F>

R42
270

<1/10W>

D9 D1FL20U

D8

+

R49 10K <1/10W>

(77)

(91)

1

2

3

4

5

6

5V

0.1

12V

IC5

5V

(92)
(93)

(94)

R35

R39 10K <1/10W>

8
4
7
5

8

4

I C1-28

I C1-73

CN9

5V

1

2

1

2

(37)

(36)

<BD102>

BLm18

<BD102>

L7

BLm18

R2 10K

<1/10W>

1%

L6

R6 49.9K

<1/10W>

R13 1.0K

<1/10W>

12V

CN6

D1F60

(86)

1

(87)

2

(88)

5V

3

(89)

4

R4 10K

5

<1/10W>

JP5

DAN217U

12V

ROOM TEMP. PIPE TEMP. THERMISTOR

R14 1.0K

<1/10W>

C15

0.1
<F>

C16

0.1

<F>

12V

R21 15.4K

<1/10W>

1%

12VD2

R22 28K

<1/10W>

1

3

D3

2

<1/10W>

R17
10K

1%

R20 1.0K <1/10W>

C26

<F>

REMOTE CONTROL COMMUNICATION

6

-

5

+

2

-

3

+

I C5-2
BA10393F

7

I C5-1
BA10393F

1

R31 390

<1/4W>

1%

5V

R30
10K
<1/10W>

C23

0.1

<F>

16 1

I C7-1
uLN2003

RESET

VCC
DO
NC

GND

VPP

5V

CS
SK
DI
NC

5V

IC6
BR93LC46

1
2
3
6

C31

0.1

<F>

EEPROM

5V

R37 10K <1/10W>
R40 10K <1/10W>

RESET

R54 10K
<1/10W>

2

4

VDD

NC

1

VOUT

GND

53

NC

IC11

BD4842

R57 330 <1/10W>
R60 330 <1/10W>
R58 330 <1/10W>
R59 330 <1/10W>

I C1-3

R52
100K
<1/10W>

LED FOR INDICATOR & REMOTE CONTROL UNIT

I C10

5V

PS2501L-1

<KD / KE>

R43 330

1

<1/10W>

2

2

3

Q6
DTC124EUA

1

C30

1000P

<R>

R44

1.0K

<1/10W>

I C1-43

H I C FOR SERIAL COMMUNICATIONS

IC26

14

VA6

27

(95)

</2W>8

I C26-14

3

2

1

Q10
DTC124EUA

R106

1.0K

I C26-10

470V

5V

R108

10K

(90)

<1/10W>

C52

R107

1000P

1.0K

<R>

<1/10W>

12V

(48)

(49)

(50)
(51)

(52)

(53)
(54)
(55)

(56)

(57)

(58)

(59)

12V

9

IC7

8

I C18-7
uLN2003

7

5V

R101 330

L3

<1/10W>

BLm11

<A601>

I C25

1

L3

BLm11

<A601>

12V

I C22

PS2561L-1-V

1

4

3

2

10

6

3

3

2

1

1

Q11
DTC124EUA

5V

3

4

3

2

PS2501L-1

1

Q12

DTC144EUA

CN8

6

5

4

3

2

1

6

5

4

3

2

1

CN5

12V

9

I C18

8

<KD / KE>

12V

I C16

BUZZER

10

(72)

CN14

(43)

3

2

(44)

1

C51

0.01
<B>

R102 390 <1/10W>
R104 10K <1/10W>

(42)

CN16

(45)

2

1

(46)

4

21

321

R114 390
<1/10W>

C54

0.01
<B>

543

5

D14
DAN202K

2

280V

R111 330K

R111 330K
<1/2W>

<1/2W>

D15

MTZJ30B

I C27

R112 62K

1

<1/2W>

2

A

LUVER OPERATING CIRCUIT

DIFFUSER

CN2

5

4

RIGHT / LEFT

3

2

1

UP / DOWN

9

8

12V

BZ1

BZ

R109 10K

<1/10W>

OUTSIDE COMMUNICATION
INPUT

OUTSIDE COMMUNICATION
OUTPUT

5V

2006.02.23 6

Models :
MW24C3F
MW24Y3F

INDICATOR PCB ASSY

K05CY-0500HSE-D0

5V

SLR-325

SLR-325

SLR-325

D201

D202

D203

I C201

GP1UM261R

2

VCC
OUT

1

GND

3

C201

0.1

<F>

5V

R201

<1/4W>

+ C202

5V

CN201

1

2

3

4

5

6

7

47

47/

10V

2006.02.23 7