IVT 12KHR-N Manuel utilisateur

SERVICE MANUAL

12KHR-N

Parts marked with " " are important for maintaining the safety of the set. Be sure to replace these parts with specified ones for maintaining the

safety and performance of the set.

This document has been published to be used for

after sales service only.

The contents are subject to change without notice.

CHAPTER 1. SPECIFICATION

[1] SPECIFICATION............................................ 1-1

[2] EXTERNAL DIMENSION............................... 1-2

[3] WIRING DIAGRAM........................................ 1-3

[4] ELECTRICAL PARTS .................................... 1-3

CHAPTER 2. EXPLAMATION OF CIRCUIT AND OP-

ERATION

[1] BLOCK DIAGRAMS....................................... 2-1

[2] MICROCOMPUTER CONTROL SYSTEM........ 2-3

[3] FUNCTION .................................................... 2-9

CHAPTER 3. FUNCTION AND OPERATION OF PRO-

TECTIVE PROCEDURES

[1] PROTECTION DEVICE FUNCTIONS AND

OPERATIONS................................................ 3-1

[2] AIR TO AIR HEAT PUMP OPERATION IN

THERMISTOR ERROR ................................. 3-3

[3] THERMISTOR TEMPERATURE CHAR-

ACTERISTICS ............................................... 3-5

[4] HOW TO OPERATE THE OUTDOOR

UNIT INDEPENDENTLY ............................... 3-6

[5] GENERAL TROUBLESHOOTING CHART........ 3-6

[6] MALFUNCTION (PARTS) CHECK METH-

OD ................................................................. 3-8

[7] OUTDOOR UNIT CHECK METHOD ..........3-10

[8] TROUBLESHOOTING GUIDE.................... 3-14

CHAPTER 4. REFRIGERATION CYCLE

[1] FLOW FOW REFRIGERANT........................ 4-1

[2] STANDARD CONDITION.............................. 4-1

[3] TEMPERATURE AT EACH PART AND

PRESSURE IN 3-WAY VALVE ...................... 4-1

[4] PERFORMANCE CURVES........................... 4-2

CHAPTER 5. DISASSEMBLING PROCEDURE

[1] DISASSEMBLY OF INDOOR UNIT............... 5-1

[2] DISASSEMBLY OF OUTDOOR UNIT......... 5-10

Parts Guide

TopPage

CONTENTS

SPLIT TYPE

12KHR-N

MODEL

In the interests of user-safety (Required by safety regulations in some

countries) the set should be restored to its original condition and only

parts identical to those specified should be used.

AIR TO AIR HEAT PUMP

12KHR-N

1 – 1

12KHR-N 5GTXKEG/CPWCNCHAPTER 1. SPECIFICATION

[1] SPECIFICATION

1. 12KHR-N

NOTE: The conditions of star”✩” marked item are based on ‘EN14511’.

MODEL INDOOR UNIT OUTDOOR UNIT

ITEMS 12KHR-N

Rated cooling capacity (Min– Max.) kW 3.5 (0.9 - 4.0)

Rated heating capacity (Min–Max.) kW 4.6 (0.9 - 6.5)

Moisture removal (at cooling) Liters/h 1.2

Electrical data

Phase Single

Rated frequency Hz 50

Rated voltage V 220-240

Rated current ڏ(Min - Max.)

Cool A 4.2 (0.9 - 5.7 )

Heat A 5.0( 0.9 - 7.4 )

Rated input ڏ(Min - Max.)

Cool W 920 (200- 1250)

Heat W 1075 (160 - 1700)

Power factor ڏCool % 95

Heat % 92

Maximum operating current A 9.6

Compressor Type Hermetically sealed rotary type

Model DA111A1F22F

Oil charge 450cc (Ester oil VG74)

Refrigerant system Evaporator Louver Fin and Grooved tube type

Condenser Corrugate Fin and Grooved tube type

Control Expansion valve

Refrigerant (R410A) 1180g

De-lce system Micro computer controled reversed systems

Noise level

(at cooling)

High dB(A) 40 47

Low dB(A) – –

Soft dB(A) 27 –

Fan system

Drive Direct drive

Air flow quantity

(at cooling)

High m3/min. 9.3 32.2

Low m3/min. 7.6 –

Soft m3/min. 5.2 –

Fan Cross flow fan Propeller fan

Connections

Refrigerant coupling Flare type

Refrigerant tube size Gas, Liquid 3/8", 1/4"

Drain piping mm O.D I16

Others

Safety device Compressor: Thermal protector

Fan motors: Thermal fuse

Fuse, Micro computer control

Air filters Polypropylene net (Washable)

Net dimensions Width mm 790 780

Height mm 260 540

Depth mm 290 265

Net weight kg 11 36

12KHR-N

1 – 2

[2] EXTERNAL DIMENSION

1. Indoor unit

2. Outdoor unit

㧔Unit㧦㨙㨙㧕

798

260

290

22.0

58 18.5

175

INVERTERAIR CONDITIONER

265

780

540

167.5

165

540

299

37.5

4.5

324

135

136

12KHR-N

1 – 3

[3] WIRING DIAGRAM

1. Indoor unit

2. Outdoor unit

[4] ELECTRICAL PARTS

1. Indoor unit

2. Outdoor Unit

DESCRIPTION MODEL REMARKS

Indoor fan motor MLB395 DC motor

Indoor fan motor capacitor – –

Transformer – –

FUSE1 – QFS-GA078JBZZ (250V, 3.15A)

DESCRIPTION MODEL REMARKS

Compressor DA111A1F22F DC motor

Outdoor fan motor MLB078 DC motor

Outdoor fan motor capacitor – –

Fu4 – QFS-GA064JBZZ(250V, 1A)

Fu3 – QFS-GA051JBZZ(250V, 2A)

Fu2 – QFS-GA052JBZZ(250V, 3.15A)

Fu1 – QFS-CA001JBZZ(250V, 20A)

Fu5, 6 – QFS-CA002JBZZ(250V, 15A)

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W I R I N G D I A G R A M

INVERTER AIR-CONDITIONER

219'45722.;70+6

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UNIT TO UNIT CORD

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LED INDICATION FOR SELF-DIAGNOSIS

Blinking NO.

#DPQTOCN%QPVGPVU

Short circuit of the outdoor thermistor

Overheat of the compressor

EEPROM error of indoor unit

Abnormal fanmotor of indoor unit

Short circuit of serial signal line

Open circuit of serial signal line

Abnormal PAM voltage and clock signal

Abnormal compressor rotation

Abnormal outdoor fan motor

Abnormal thermistor of four way valve

Abnormal AC current

DC over current

Open circuit of the outdoor thermistor

LED indicator will blink, if the set is in abnormal condition.

Thermal fuse error of outdoor unit

Abnormal wire connection

EEPROM error of outdoor unit

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CO N NE CT OR

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12KHR-N

2 – 1

12KHR-N 5GTXKEG/CPWCNCHAPTER 2. EXPLAMATION OF CIRCUIT AND OPERATION

[1] BLOCK DIAGRAMS

1. Indoor unit

AC power

Rectification circuit

CPU

3.15A

Fuse

DC power supply circuit

Fan motor PWM control circuit

Rotation pulse input circuit

AC clock circuit

Remote controller signal reception circuit

Buzzer drive circuit

CPU reset circuit

CPU oscillator circuit

Room temp. detect circuit

Heat exchanger pipe thermo circuit

EEPROM

Select circuit

Serial I/O circuit

Auto restart circuit

Test run circuit

Auxiliary mode

Power on circuit

Cluster generator drive circuit

Indoor fan motor

Fan motor pulse detect

Wireless remote control operation

Audible operation confirmation

Room temp. thermistor

Heat exchanger pipe thermistor

Louvre angle, fan speed

Wireless, preheat, Model select

Indoor/outdoor control signal I/O

Test run (forced operation)

Auxiliary mode button ON/OFF

Self diagnostics, fault diagnosis

Cluster generator

Unit-unit wiring

(AC power and

serial signals)

LED Drive circuit LED display

Louver motor drive circuit (Horizontal)

Louver motor drive circuit (Vertical, right)

Louver motor drive circuit (Vertical, left)

How direction control (Horizontal louver motor)

How direction control (Vertical louver motor,right)

How direction control (Vertical louver motor,left)

12KHR-N

2 – 2

2. Outdoor unit

CPU

20A

protection

15A

protection

Expansion valve drive circuit Expansion valve

Suction temp. thermo. circuit Suction pipe thermistor

2-way valve temp. thermo. circuit 2-way valve thermistor

3.15A

protection

15A

protection

Power supply circuit

CPU oscillator circuit

DC overvoltage detection circuit

Outdoor fan drive circuit

4-way valve relay drive circuit

Power transistor module drive circuit

Serial I/O circuit

CPU reset circuit

Position detection circuit

AC overcurrent detection circuit

Compressor thermo circuit

Heat exchanger pipe thermo circuit

Outdoor temp. thermo. circuit

LED drive circuit

Test mode circuit

Power factor

converter circuit

Filter

circuit

Smoothing

circuit

Pulse amplitube modulation circuit

EEPROM

AC clock circuit

DC overcurrent detection circuit

IGBT

Unit-unit wiring (AC power

and serial signals)

Outdoor fan

4-way valve

Power transistor module

Compressor

Current transformer

Compressor thermistor

Heat exchanger pipe thermistor

Outdoor temperature thermistor

LED

Terminal board, Terminal fuse, circuit Terminal board, Terminal fuse

12KHR-N

2 – 3

[2] MICROCOMPUTER CONTROL SYSTEM

1. Indoor unit

1.1. Electronic control circuit diagram

LED

301

R318

180 1W

FULL

POWER

OUTDOOR

TEMP

LED

304

LED

302

LED

303

R317

360

R316

100

R315

100

RED

YELLOW

GREEN

SG301

OPERATION

TIMER

GREEN

1W 560

COM2

COM1

15 14 3 2 1 16 4

a1 b1 c1 d1 e1 f1 g1

R304

R305

R306

R307

R308

R309

R310

1W 560

f2e2d2c2b2a2

811567910

BCN301

1W 180

1W 560

1W 180

R128

TERMINAL

BOARD 3P

FAN

MOTOR

AUTO

RESTART

SELECT

0.01uF

250Vx2

275V 0.1uF

C12A

C12B 275V 0.1uF

CLUSTER

BCN602

0.1uF

47uF

50V 1000p

10.0KF

47K

25V

10V

100uF

25V

47K

CN90

1000p

0.1uF

1uF

P83

P82

P81

P80

P05

P06

P70

P71

P72

P73

P74

P75

P76

P77

P67

P66

P65

P64

P31

P63

P62

P61

P60

VDD1

P140

P141

P142

P143

P144

P145

P00

P01

P02

P03

P04

P131

P130

P20

P21

P22

P23

P24

P25

P26

P27

P150

P151

P152

P153

P154

P155

P156

P157

AVSS

VSS1

P30

P87

P86

P85

P84

0.01uF

25V

0.1uF

0.01uF

0.1uF

100uF

10V

4.7K

R93

100K

C90

R90

7.5K

4.7K

10K

6.8KF

0.1u

50V

100u

35V

25V 0.1u

1/4W

3.3K

910x2

WIRELESS

47K

4.7Kx2

POWER

MODEL

BZ1

1/4W

1.8K

KRC108S

NF1

D1N60

11K 2W

4.7K

56K

TEST

4.7K

CLUSTER

4.7K

6.8KF

3.3K

6.8K

56K

16V47uF

10K

6.8K

R7 100K

R17

R19

R18

R29

R31

R32

R34

R37

R36

R71

R76

R77

R78

R80

R81

R86

R88

R95

R96

R100

R101

R108

R109

R110

R111

R112

R114 10KF

R105

R107

ZD1 HZ24-2

C1 35V100uF

C2 35V0.047uF

C3 50V0.01uF

C15

C16

C17

C18

C41

C42

C43

C44

C45

C46

C58

C59

C62

Q13

Q14

Q15

47K

JP8

JP9

JPW

R118

R119

R120

R40

DB1

D2SBA60

1/2W 1MX2

R85

R84

R41

1/2W 1M

C12 275V 0.1uF

NR1

R27 R26

C5 0.01u

250V

Q11

KRC106S

R97

4.7K

25V

0.1uF

C13

R38

100K

R39

16V

C301

C302

R83

10K

D1N60

39K

R28

1/2W

200K 1/2W

200K

R94

C61

0.1uF

KRC108S

1/4W

R302

R303

LED310

3.6Kx2

R121

10K

25V

4.7uF

C60

R11 R10

2.7K

KID65004AF

0.1uF

1000pF

C65

C66

50V 1000p

0.1uF

25V

47K

C402

C401

25V

16V

KID65004AF KID65004AF

25V 0.1uF

47uF

KID65004AF

KID65783AF

C67

R116

10K

R127

4.7K

47K

JP1

47K R125

KID65004AF

10KF

11K

JP2

CN1

OSC1

8MHz

10K

50V

10V

P110

P50

AVR1

AVR0

P111

P51

P52

P53

P54

P55

P56

P57

P17

P16

P15

P14

P13

P12

P11

P10

100

P120

P47

P46

P45

P44

P43

P42

P41

P40

REST

P124

P123

FLMD

REGC

VSS

VSS0

VDD

VDD0

25V

50V

25V

106S

KRC

R92

470

5.1K

R91

HAJP

12V

KIA7815

5V 1K

12V

SW401

SAFETY SW

0.01uF

50V

PC81716NIP

1Vs

Vcc

7Vm

GND

3PG

D1N60

10K

GND

RESET

TOOL0

FLMD0

680

PC817XP3

28.2K

680

TH1

PIPE TEMP

TH2

R33

R35

R57

R70

R73

R79

R98

R99

R102

R113

R117

ROOM TEMP

IC1

R106

R104

PC4

PC5

PC6

PC7

CN3

C14

C40

C47

C48

C49

C50

C51

C52

C53

C54

C55

C56

IC13

IC5

10K

KRA224S

R63

CN1

NTC1

10D

SSR1

PR32MA11NXPF

R16

R1 3.3K

3.15A-250VFU1

TOOL1

VDD

R74

R75

889

IC9

Q10

12V

IC11

CN18

IC12

12V

R82

10K

PC817XP3

PC1

PC817XP3

SERIAL SIGNAL CIRCUIT

PC853HXP

PC2

R301 IC301

CN17

CN10

BCN10

CN11

BCN302

7 3

8 2

9 1

1 2 3 4 5 6 7 8

IC7

R122

R124

R123

10K

TXD0

RXD0

54321

BLUE

C68

50V

PANEL

SW1

SW2

PANEL

47 IC401

R401

987654321 54321

LOUVER M H

THERMISTOR

IC8

CN13 CN14 CN15 CN16

BCN401

CN15

R134

R132

R135

R133

9 9

D18

CN17

FLASH

CN608

CN609

BCN604

12V

BCN602

BCN601 CN601

CN602

CN603

CN19

1 2 3 4 5

IC14

1 2 3 4 5 6 7 8

987654321

CN15

CN14

54321

HANG M R

HANG M L

54321

123456789 87654

321

1 2 3 4 5

PANEL M L PANEL M R

1 2 3 4 5

BCN603 BCN604

CN604 CN605 CN606 CN607

4.3KF

R129

10K

1W 100K

BLUE

R137 680

EC7

G(Y)

10KF

KRA106S

R51

2.7K

R52

1.5K

R89

2.2M

R72

6.8K

R61

3.3K

R64

3.3K

R136

56K

IC3

KIA431

R54

10KF

R49

220

C30

220uF

10V

C23

10uF

16V

C29

1000uF

25V PC8

PC817x3

R43

R42

120K

1/2W

C21

1000pF

1KV

D10

RU2CV1

D1FL20U R45

3.3

C19

100uF

50V

C24

47uF

16V

D1FL20U

S3L20U

ZD3

HZ27-2

C20

120uF

450V

R48

100K

C31

0.1uF 50V

R50

100K

R87

1.5M

PC817XP3

19V

R53 10KF

IC2 TOP258PN

C22 0.1uF 50V

R46

12V

PC8

CONTROL

TR1

R44 10

220

C25 0.01uF 50V

12V

275V

0.1uF

12KHR-N

2 – 4

1.2. Display circuit diagram

LED

301

R318

180 1W

FULL

POWER

OUTDOOR

TEMP

LED

304

LED

302

LED

303

R317

360

R316

100

R315

100

RED

YELLOW

GREEN

SG301

OPERATION

TIMER

GREEN

1W 620

COM2

COM1

15 14 3 2 1 16 4

a1 b1 c1 d1 e1 f1 g1

R304

R305

R306

R307

R308

R309

R310

1W 620

f2e2d2c2b2a2

811567910

BCN301

1W 220

1W 620

1W 220

0.1uF

47uF

16V

C301

C302

1/4W

R302

R303

LED310

7.5Kx2

C402

C401

25V

16V

25V 0.1uF

47uF

SW401

SAFETY SW

CN18

R301 IC301

CN17

BCN302

7 3

8 2

9 1

1 1

47 IC401

R401

BCN401

9 9

12V

BCN602

BCN601 CN601

CN602

CN603

BLUE

12KHR-N

2 – 5

1.3. Printed wiring board

For 2KHN model main PWB

For 2KHN model sensor PWB

From cluster unit From fan motor From horizontal louver motor

From pipe thermistor

(relay connector)

From sensor PWB

To main PWB

To vertical louver motor(left)

To vertical louver motor(right)

12KHR-N

2 – 6

For 2KHN model connection PWB

For 2KHN model display PWB

To main PWB To main PWB To main PWB To main PWB

From hang

motor left

From panel

motor left

From panel

SW left

From panel

SW right

From panel

motor right

From hang

motor right

From display

PWB(black)

From display

PWB(yellow)

To connection PWB

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