Mitsubishi Electric SUZ-KA18NA2 Manuale utente

SERVICE MANUAL R410A

Outdoor unit

[Model Name]

SUZ-KA18NA2

SUZ-KA18NAH2

SUZ-KA24NA

SUZ-KA24NAH2

SUZ-KA30NA

SUZ-KA30NAH2

SUZ-KA36NA

SUZ-KA36NAH2

[Service Ref.]

SUZ-KA18NA2.TH

SUZ-KA18NAH2.TH

SUZ-KA24NA2.TH

SUZ-KA24NAH2.TH

SUZ-KA30NA2.TH

SUZ-KA30NAH2.TH

SUZ-KA36NA2.TH

SUZ-KA36NAH2.TH

PARTS CATALOG (OCB688)

Note:

• This manual describes service

data of the outdoor units only.

No. OCH688

REVISED EDITION-D

June 2021

SPLIT-TYPE, AIR CONDITIONERS

SUZ-KA18NA(H)2.TH

Revision:

•Some descriptions have

been modified in REVISED

EDITION-D.

OCH688C is void.

CONTENTS

1. COMBINATION OF INDOOR AND

OUTDOOR UNITS ···································· 2

2. PART NAMES AND FUNCTIONS ············ 2

3. SPECIFICATION······································· 3

4. OUTLINES AND DIMENSIONS················ 4

5. WIRING DIAGRAM··································· 5

6. REFRIGERANT SYSTEM DIAGRAM ······ 9

7. DATA ······················································· 11

8. ACTUATOR CONTROL·························· 14

9. SERVICE FUNCTIONS··························· 15

10. TROUBLESHOOTING···························· 15

11. FUNCTION SETTING ····························· 32

12. DISASSEMBLY INSTRUCTIONS··········· 35

OCH688D

1COMBINATION OF INDOOR AND OUTDOOR UNITS

OUTDOOR UNIT

Piping

Air outlet

Drain outlet

Air inlet

(back and side)

Drain hose

PART NAMES AND FUNCTIONS

SUZ-KA18NA(H)2.TH SUZ-KA24NA(H)2.TH SUZ-KA30NA(H)2.TH SUZ-KA36NA(H)2.TH

Heat pump type

Outdoor unit

SUZ-

—

Indoor unit

Service

Manual No.

Service Ref.

Heat pump without

electric heater

OCH669

OCB669

KA18NA(H)2.TH

—

PEAD-A18AA7.MX

PEAD-A24AA7.MX

PEAD-A30AA7.MX

PEAD-A36AA7.MX

SVZ-KP18NA.MX

SVZ-KP24NA.MX

SVZ-KP30NA.MX

SVZ-KP36NA.MX

MLZ-KP18NA

MD-1404-K019

MD-1404-K018

KA24NA(H)2.TH KA30NA(H)2.TH KA36NA(H)2.TH

HWE08020

BWE10180

OBH802

OBB802

HWE16080

BWE016290

—

SEZ-KD18NA4.TH

SLZ-KF18NA.TH

OCH688D

Outdoor unit model SUZ-KA18

NA(H)2

SUZ-KA24

NA(H)2

SUZ-KA30

NA(H)2

SUZ-KA36

NA(H)2

Power supply V , phase , Hz 208/230 , 1 , 60

Max. fuse size (time delay) A 15 20

Min. circuit ampacity A 14 17

Fan motor F.L.A 0.67 1.00

Compressor

Model SNB130FQBMT SNB220FQGM1T

R.L.A 10.0 13.0

L.R.A 12.5 16.0

Refrigeration oil oz. (Mod-

el) 11.8(FV50S) 15.6(FV50S)

Refrigerant control Linear expansion valve

Sound level*1Cooling dB(A) 54 55

Heating dB(A) 55

Defrost method Reverse cycle

Dimensions

W in 33-1/16

D in 13

H in 34-5/8

Weight Ib 127 129

External nish Munsell 3Y 7.8/1.1

Control voltage

(by built-in transformer)

VDC 12 - 24

Refrigerant piping Not supplied

Refrigerant pipe size

(Min. wall thickness)

Liquid in 1/4 (0.0265) 3/8(0.0285)

Gas in 1/2 (0.0285) 5/8(0.0315)

Connection method Indoor Flared

Outdoor Flared

Between the indoor &

outdoor units

Height difference ft 50 100

Piping length ft 100

Refrigerant charge (R410A) 3 lb. 9 oz. 4 lb. 14 oz.

Note: Test conditions are based on AHRI 210/240.

Rating conditions (Cooling) — Indoor: 80˚F D.B., 67˚F W.B., Outdoor: 95˚F D.B., (75˚F W.B.)

(Heating) — Indoor: 70˚F D.B., 60˚F W.B., Outdoor: 47˚F D.B., 43˚F W.B.

3SPECIFICATION

OPERATING RANGE

(1) POWER SUPPLY

Rated voltage Guaranteed voltage (V)

Outdoor unit

208/230 V

1 phase

60 Hz

Min. 187 208 230 Max. 253

OCH688D 4

Unit: inch

SUZ-KA18NA(H)2.TH SUZ-KA24NA(H)2.TH SUZ-KA30NA(H)2.TH SUZ-KA36NA(H)2.TH

4OUTLINES AND DIMENSIONS

16-7/16

1-9/16

1-5/8

Drain hole

6-7/8 19-11/16

Air in

Air out

2-holes 13/32 13/16

14-3/16

33-1/16

4-5/16

3-3/16

34-5/8

17-25/32

Service panel

3-29/32

6-1/2

7-11/16

Liquid refrigerant pipe joint

Refrigerant pipe (flared) Ø 1/4 (KA18)

Refrigerant pipe (flared) Ø 3/8 (KA24/30/36)

Gas refrigerant pipe joint

Refrigerant pipe (flared) Ø 1/2 (KA18)

Refrigerant pipe (flared) Ø 5/8 (KA24/30/36)

*1 20 in. (500 mm) or more when front

and sides of the unit are clear

14 in. (350 mm)

or more

4 in. (100 mm)

or more

REQUIRED SPACE

Clear *1

4 in. (100 mm)

or more

20 in. (500 mm)

or more *2

*2 When any 2 sides of left, right

and rear of the unit are clear

OCH688D 5

SUZ-KA18NA2.TH

5WIRING DIAGRAM

OCH688D

SUZ-KA18NAH2.TH

OCH688D

SUZ-KA24NA2.TH 　SUZ-KA30NA2.TH　 SUZ-KA36NA2.TH

Ｌ

ＭＳ

３～

TAB61

TAB62

TABS3

LED

PTC65

DB41A

DB41B

X64

TAB3B TAB3A

PTC64

WHRD

F601

Q3B

CIRCUIT

BREAKER

GNYE

Q3A

D3B

D3A

208/230V

60Hz

TB1

ＭＦ

ＭＣ

CB3

IC700

TAB9 TAB8 TAB7

＋＋

CB2

＋

CB1

TAB4A

TAB4B

POWER

SUPPLY

２１Ｓ４

Ｓ１

Ｓ３

Ｓ２

ＭＳ

３～

26H

RT61

1 2

CN601 X601

Ｍ

ＬＥＶ

CN724

RT65

CN672

LD9 BK

TABS3

LED

INVERTER

P.C.

BOARD

T801

CN602

LDE1

LDE2

X602 F601

RT64

t°

RT68RT62

5 1

CN931

CN673

1 6

CN671

GNYE

INDOOR

UNIT

208/230V

24V

DC-12

TB2

ＭＦ

F880 F901

TAB9

IC932

CN932

2 2 RD

1 1

BK BK

BKBK

BK t°t°t°t°

NAME

SWITCHING

POWER

TRANSISTOR

DEFROST

THERMISTOR

DISCHARGE

TEMP.THERMISTOR

AMBIENT

TEMP.THERMISTOR

FIN

TEMP.THERMISTOR

OUTDOOR

HEAT

EXCHANGER

TEMP.THERMISTOR

SYMBOL

Q3A,Q3B

RT61

RT62

RT64

RT65

RT68

TERMINAL

BLOCK

TRANSFORMER

TB1,TB2

T801

X64

RELAY

X601,X602

RELAY

21S4

26H

HEATER

PROTECTOR

（

OPTION

PARTS

）

REVERSING

VALVE

COIL

SYMBOL

NAME

F901

F880

F601

FUSE

（

T3.15AL250V

）

FUSE

（

T3.15AL250V

）

DEFROST

HEATER

（

OPTION

PARTS

）

IC700,IC932

REACTOR

POWER

MODULE

PTC64,PTC65

CIRCUIT

PROTECTION

LEV

LED

EXPANSION

VALVE

COIL

COMPRESSOR

FAN

MOTOR

DIODE

（

OPTION

PARTS

）

SYMBOL

NAMENAME

DIODE

MODULE

SMOOTHING

CAPACITOR

FUSE

（

T3.15AL250V

）

SYMBOL

DB41A,DB41B

D3A,D3B

CB1,CB2,CB3

NOTES

1.About

the

indoor

side

electric

wiring,

refer

the

indoor

unit electric

wiring

diagram

for

servicing.

2.Use

copper

supply

wires. 3.Symbols

indicate, :Terminal

block :Connector

OCH688D

SUZ-KA24NAH2.TH SUZ-KA30NAH2.TH SUZ-KA36NAH2.TH

RELAY

X601,X602

DEFROST

HEATER

POWER

SUPPLY

3 1

CN932

IC932

TAB4B TAB4A

CB1

＋

CB2

＋＋

TAB7TAB8TAB9

IC700

CB3

BK V

ＭＣ

1 1

3 3

F901F880 8

ＭＦ

TB2

12 - 24V

208/230V

TB1

208/230V

60Hz

INDOOR

UNIT

D3A

D3B

Q3A

GNYE

CIRCUIT

BREAKER

Q3B

CN671

CN673

1 2

CN931

RT62 RT68

t°t°t°t°t°

RT64

F601

X602

LDE2

LDE1

CN602

T801

INVERTER

P.C.

BOARD

RD WH

PTC64

TAB3A

TAB3B

X64

DB41B

DB41A

PTC65

3 4

4 3

BU YE

LED

TABS3

TAB62 TAB61

LD9

1 2

CN672

RT65

CN724

ＬＥＶ

Ｍ

X601

CN601

RT61

３～

ＭＳ

３～

ＭＳ

Ｓ２

Ｓ３

Ｓ１

Ｌ

２１Ｓ４

3.Symbols

indicate,

:Terminal

block

:Connector2. Use

copper

supply

wires.

1. About

the

indoor

side

electric

wiring,

refer

the

indoor

unit

electric

wiring

diagram

for

servicing.

NOTES

RELAY

NAME

F601

F880

F901

CB1,CB2,CB3

D3A,D3B

DB41A,DB41B

SYMBOL

FUSE

（

T3.15AL250V

）

FUSE

（

T3.15AL250V

）

FUSE

（

T3.15AL250V

）

SMOOTHING

CAPACITOR

REACTOR

CIRCUIT

PROTECTION

FAN

MOTOR

COMPRESSOR

EXPANSION

VALVE

COIL

LEV

LED

DISCHARGE

TEMP.THERMISTOR

RT62

TRANSFORMER

T801

TERMINAL

BLOCK

RT68

TEMP.THERMISTOR

OUTDOOR

HEAT

EXCHANGER

TB1,TB2

SWITCHING

POWER

TRANSISTOR

Q3A,Q3B

DIODE

MODULE

NAME NAME NAME

SYMBOL SYMBOL

DIODE

RT64

FIN

TEMP.THERMISTOR

POWER

MODULE

PTC64,PTC65

X64

IC700,IC932

RT61

DEFROST

THERMISTOR

RT65

AMBIENT

TEMP.THERMISTOR

21S4

26H

HEATER

PROTECTOR

REVERSING

VALVE

COIL

SYMBOL

BKBKBK

1 1

2 2

26H

OCH688D

Unit: inch (mm)

SUZ-KA18NA(H)2.TH

Outdoor

heat

exchanger

Flared connection

Defrost

thermistor

RT61

Discharge

temperature

thermistor

RT62

Flared connection

Stop valve

Capillary tube

O.D. 0.157×

I.D. 0.094×

3-15/16

(ø

4.0

2.4

100)

Capillary tube

O.D. 0.157×

I.D. 0.094×7-7/8

(ø

4.0

2.4

200)

Refrigerant flow in cooling

Compressor

4-way

valve

Refrigerant flow in heating

Refrigerant pipe

ø1/2

(

12.7)

(with heat insulator)

Refrigerant pipe

ø1/4

(

6.35)

(with heat insulator)

LEV

R.V. coil

heating ON

cooling OFF

Strainer

#100

Outdoor heat

exchanger

temperature

thermistor

RT68

Strainer

#100

Muffler

Capillary tube

O.D. 0.118×

I.D. 0.079× 7-7/8

(ø3.0×ø2.0×200(×4))

Stop valve

(with service port)

Service

port

Service port

Muffler

Strainer

#100

6REFRIGERANT SYSTEM DIAGRAM

SUZ-KA24NA(H)2.TH SUZ-KA30NA(H)2.TH SUZ-KA36NA(H)2.TH

Outdoor

heat

exchanger

Flared connection

Defrost

thermistor

RT61

Discharge

temperature

thermistor

RT62

Flared connection

Stop valve

(with strainar)

Stop valve

(with service port)

Capillary tube

O.D. 0.142 × I.D. 0.094

× 1-31/32

(ø

3.6

2.4

50)

Refrigerant flow in cooling

Compressor

4-way valve

Refrigerant flow in heating

Refrigerant pipe

5/8

(with heat insulator)

Refrigerant pipe

3/8

(with heat insulator)

LEV

R.V. coil

heating ON

cooling OFF

Muffler

#100

Receiver

Outdoor heat

exchanger

temperature

thermistor

RT68

Ambient

temperature

thermistor

RT65

Strainer

#100

Service port

Unit: inch (mm)

OCH688D

Max. Length

Max. Height

difference

Indoor

unit

Outdoor unit

MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE

Model

Refrigerant piping: ft. Piping size O.D: in.

Max. Length

Max. Height difference

BGas Liquid

SUZ-KA18/NA(H)2

100

50 1/2 1/4

SUZ-KA24/30/36

NA(H)2 100 5/8 3/8

ADDITIONAL REFRIGERANT CHARGE (R410A: oz.)

NOTE: Refrigerant piping exceeding 25 ft. requires additional refrigerant charge according to the calculation.

Model Outdoor unit

precharged

Refrigerant piping length (one way): ft.

25 30 40 50 60 70 80 90 100

SUZ-KA18NA2

SUZ-KA18NAH2 3 lb. 9 oz. 0 1.08 3.24 5.40 7.56 9.72 11.88 14.04 16.20

Calculation: X oz. = 1.08/5 oz./ft. × (Refrigerant piping length (ft.) - 25)

Model Outdoor unit

precharged

Refrigerant piping length (one way): ft.

25 30 40 50 60 70 80 90 100

SUZ-KA24/30/36

NA(H)2 4 lb. 14 oz. 0 2.69 8.07 13.45 18.83 24.21 29.59 34.97 40.35

Calculation: X oz. = 2.65/5 oz./ft. × (Refrigerant piping length (ft.) - 25)

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