AUX ALCA-HS12/4DR2, AL-HS12/4DR2(U) User guide

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1

AUX DC Inverter LCAC Europe R32 Technical &Service Manual

Contents

Part1 General Information ......................................................... 3

Part2 Features ........................................................................... 9

Part3 Piping System ................................................................ 21

Part4 Dimension ...................................................................... 22

Part5 Electrical Principle Diagram ........................................... 35

Part6 Capacity Amendment ..................................................... 41

Part7 Static pressure curve ..................................................... 45

Part8 Sound level .................................................................... 48

Part9 Controller ........................................................................ 63

Part10 PCB Instruction ............................................................ 81

Part11 Protection ..................................................................... 90

Part12 Electric Characteristic .................................................. 92

Part13 Trouble Shooting .......................................................... 93

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Compac

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cassette

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Pictu

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Capacity

12 K

18 K

24 K

36 K

42 K

tu/h

Range /

ALCA-H1

ALCA-H12

ALCA-H1

ALCA-H18

ALCA-H24

ALCA-H36

ALCA-H42

ode

/NDR3HYA

NDR3HY2

/NDR3HYA

NDR3HY2

NDR3HYB

NDR3HY2

NDR3HYB

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Standard

Panel

Optional

Panel

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48 K

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ALCA-H60

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60

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ALCF-H

Range /

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18/NDR3H

8/NDR3HF

4/NDR3H

4/NDR3HF

36/NDR3H

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ALMD-H

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30 K

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36 K

42 K

48 K

60 K

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ALMD-H

ALMD-H3

ALMD-H

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Unit

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12 K Btu/h

18 K Btu/h

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ALC

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AUX DC Inverter LCAAC Euro

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1

AUX DC Inverter LCAC Europe R32 Technical &Service Manual

5.Console

5.1 Strong heating capacity

Full DC inverter air source heat pump heater

It can easily cope with various harsh outdoor environment in winter and create a warm and

healthy home for you

5.2 Approximate to Floor heating

The wind blows from the bottom, and the feet are warm; the wind blows from the top, it heats up

quickly the temperature rise rate is faster than conventional floor heating. Bring comfortable

heating enjoyment

5.3 Full DC inverter technology

Both indoor and outdoor units adopt full DC invrter technology, which is highly efficient and

energy-saving

5.4 Continuous heating

Under low temperature conditions, it can be continuously heated for a long time without

defrosting, no obvious temperature fluctuations, and enjoy a comfortable heating.

5.5 Purify first

The console has a long-lasting air filter, making the air fresher and healthier, creating a healthy

home for you.

20

AUX DC Inverter LCAC Europe R32 Technical &Service Manual

Part3 Piping System

The compressor inhales the low-temperature and low-pressure refrigerant vapor from the evaporator, and

vapor be turned into high-temperature and high-pressure gas then enters into condenser, the

high-temperature and high-pressure refrigerant gas and outdoor air make heat exchange in the

condenser, the compressed vapor is then cooled by heat exchange with the outside air, so that the vapor

condenses to be a high-temperature and high-pressure fluid, and then through capillary throttling to

cooled, low pressure, then the liquid enters into the evaporator and two-phase of gas and liquid

refrigerant in the evaporator completely evaporate, thereby cooling the indoor air; from evaporator the

vapor is inhaled into compressor again, so it runs continuously cycle to cycle, cooled air is continuous

supplied to the air-conditioned area though duct by fan motor.

Evaporator

T- ind oor coil

Stop va lve

Fa n

T- indoor am bient

Stop va lve

(gas)

Lo w P re ssu re

Sw itc h

(liquid)

Four-w ay valve

T- suc t ion

inverter

Filte r

High P re ssu re

Sw itc h

T- d isc h a rg e

EEV

Condenser

T-outdoor am bient

Fa n

T- C o nd ense r middle

T- d e fr ost

Filte r

21

AUX DC Inverter LCAC Europe R32 Technical &Service Manual

Part4 Dimension

1. Cassette

1.1 Compact cassette

ALCA-H12/NDR3HY A, ALCA-H12/NDR3HY2A, ALCA-H18/NDR3HY A, ALCA-H18/NDR3HY2A:

1.2 Round-flow cassette

ALCA-H24/NDR3HYB, ALCA-H24/NDR3HY2A:

22

AUX DC Inverter LCAC Europe R32 Technical &Service Manual

ALCA-H36/NDR3HYB, ALCA-H42/NDR3HYB, ALCA-H48/SDR3HYB, ALCA-H60/SDR3HYB:

2. Ceiling Floor

ALCF-H18/NDR3HF, ALCF-H18/NDR3HF2:

1000

690

(280)

235

（944）

23

AUX DC Inverter LCAC Europe R32 Technical &Service Manual

ALCF-H24/NDR3HF, ALCF-H24/NDR3HF2:

1280

690

235

(280)

ALCF-H36/NDR3HF, ALCF-H42/NDR3HF, ALCF-H48/SDR3HF, ALCF-H60/SDR3HF:

（1224）

1600

690

235

(2 8 0 )

（1544）

24

AUX DC Inverter LCAC Europe R32 Technical &Service Manual

3. Duct

ALMD-H18/NDR3HA, ALMD-H18/NDR3HM2, ALMD-H24/NDR3HA, ALMD-H24NDR3HM2, ALMD-H30/NDR3HA, ALMD-H30/NDR3HM2:

(811)

Air O u tlet

(1 7 5)

245 1000

(6 0 0)

700

(1039)

(2 0 4 )

Air R e tu rn

(8 7 4)

25

AUX DC Inverter LCAC Europe R32 Technical &Service Manual

ALMD-H36/NDR3HA, ALMD-H42/NDR3HA, ALMD-H48/SDR3HA, ALMD-H60/SDR3HA:

（1213）

（178）

Air O u tlet

1400245

（600）

700

(1439)

112.2±0.1

Air R e tu rn

（1275）

（208）

26

A

L

n

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A

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UX DC I

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MD-H18/N

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R3HM2A

AC Europe R32

echnical &Service Manual

2

AUX DC Inverter LCAC Europe R32 Technical &Service Manual

4. Console

5. Outdoor Unit

5.1 AL-H12/NDR3A(U), AL-H18/NDR3A(U):

545

(860)

800

(315)

(545)

315

28

AUX DC Inverter LCAC Europe R32 Technical &Service Manual

5.2 AL-H12/NDR3HB2(U)

29

AUX DC Inverter LCAC Europe R32 Technical &Service Manual

5.3 AL-H18/NDR3HB2(U)

30

AUX DC Inverter LCAC Europe R32 Technical &Service Manual

5.4 AL-H24/NDR3A(U)

(950)

0 0 7

900

(630)

) 0 5 3 (

0 5 3

31

AUX DC Inverter LCAC Europe R32 Technical &Service Manual

5.5 AL-H24/NDR3HB2(U), AL-H30/NDR3HB2(U)

32

AUX DC Inverter LCAC Europe R32 Technical &Service Manual

5.6 AL-H30/NDR3A(U), AL-H36/NDR3A(U), AL-H42/NDR3A(U)

805

970

395

（675）

（409）

（1044）

33

AUX DC Inverter LCAC Europe R32 Technical &Service Manual

5.7 AL-H48/SDR3A(U), AL-H60/SDR3A(U)

1325

(1010)

940

(6 2 5 )

370

(364)

34

AUX DC Inverter LCAC Europe R32 Technical &Service Manual

Part5 Electrical Principle Diagram

1. Cassette

ALCA-H12/NDR3HYA, ALCA-H12/NDR3HY2A, ALCA-H18/NDR3HYA, ALCA-H18/NDR3HY2A, ALCA-H24/NDR3HYB, ALCA-H24/NDR3HY2A, ALCA-H36/NDR3HYB, ALCA-H42/NDR3HYB, ALCA-H48/SDR3HYB, ALCA-H60/SDR3HYB

θ

Controller Panel

LN

2

1

1643701000

0610

35

AUX DC Inverter LCAC Europe R32 Technical &Service Manual

2. Ceiling Floor

ALCF-H18/NDR3HF, ALCF-H18/NDR3HF2, ALCF-H24/NDR3HF, ALCF-H24/NDR3HF2, ALCF-H36/NDR3HF , ALCF-H42/NDR3HF, ALCF-H48/SDR3HF, ALCF-H60/SDR3HF:

Controller Panel

θ

RD BKGNYE

YE

GN

A B

1643701000

0609

36

AUX DC Inverter LCAC Europe R32 Technical &Service Manual

3. Duct

ALMD-H18/NDR3HA, ALMD-H18/NDR3HM2, ALMD-H18/NDR3HM2A , ALMD-H24/NDR3HA, ALMD-H24NDR3HM2, ALMD-H30/NDR3HA, ALMD-H30/NDR3HM2,

ALMD-H36/NDR3HA, ALMD-H42/NDR3HA, ALMD-H48/SDR3HA, ALMD-H60/SDR3HA

Controller Panel

RD BKGNYE

θ

GN

YE

A B

1643701000

0609

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Consol

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CO-H12/4

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3A、ALC

AC Euro

e R32

echnical &Service Manual

-H18/4R3

3

AUX DC Inverter LCAC Europe R32 Technical &Service Manual

5. Outdoor Unit

AL-H12/NDR3A(U), AL-H18/NDR3A(U), AL-H24/NDR3A(U):

ON

1

2

3

LN

POWER

1643701000

4-Way Valve

On-line test line

GN

B

A

Indoor Unit

0622

M2

YE

Pd

Ps

M3

HP Sensor

LP Sensor

6θ6

M4

M5

θθθ θθθθθθθ

6

Tao Ts

Metal partition

Ps1

Pd1

Reactor

PMV3(EVL3)

PMV2(EVL2)

PMV1(EVL1)

BN

Notes:

L1

(L-I)

L2

(L-O)

U

XE

W

V

(GND1)

Tcm Td1

Tdef

Tao Sensor

Defrost Sensor

Condensor Mid Sens or

Compressor suc tion Sensor

Liq-B

Liq-A

Exhaust Sensor

Liq-C

Gas-B

Gas-A

Controlling Panel

HP1 LP1

Gas-C

ON

21

Notes: Some models have no content inside dashed frame

000 00 001 00 010 00 100 00 110 00

101 00

011 00 100 100 00

00

V

U

M1

Compressor

XE

W

Y/G

PE

BN BU BN BU BN BU BN BU

C(S)

L

N

Indoor UnitA

C(S) C(S)

Indoor UnitB

LNLN

Indoor UnitC

AL-H12/NDR3HB2(U), AL-H18/NDR3HB2(U), AL-H24/NDR3HB2(U), AL-H30/NDR3HB2(U)

DC Motor

M1

AC Motor

M2

4WV

Heater

Temperature Sensor

θ1

θ2

θ3

DC-M

AC-M

4WV

CH

U

VW

Controlling Panel

EVL

GND

AC-L

T S U A H X E

AC-N

E

M

P

O

I P

RO

S

BK

BU

Some models have no content inside dashed frame

RD

U

VW

M3

Compressor

Y/G

PE

M4

EXV

PE

Y/G

BURD

POWER

Y/G

1643701000

Electrical Wiring Diagram

L N

IDU

BUBN BK

S

BUBN BK

0599

Y/G

PE

Y/G

PE

39

AUX DC Inverter LCAC Europe R32 Technical &Service Manual

AL-H30/NDR3A(U), AL-H36/NDR3A(U), AL-H42/NDR3A(U):

M1

M2

Metal Partition

M3

PE

EVL1

Temperature Sensor

Tao Ts Tdef Tcm

LP

HP

Td

RD BU

L

GND

function selection

Silent mode

Y/G

PE

:

N

PE

COMP1

485-BUS

Tao Sensor

Defrost Sens or

Exhaust Sensor

Condensor Mid Sensor

Compressor Suction Sensor

GND

B

A

M4

M5

M6

PE

ON

1

2

3

21

Notes: Some models have no content inside dashed frame

AL-H48/SDR3A(U), AL-H60/SDR3A(U):

Driv e mo dular boa rd

To power

：

Note Some models have no content inside dashed frame

To power

To i n d o o r u n i t

AC F a n

Mo tor1

AC F a n

Motor 2

Electr ic Hea te r

Motor bracket

Oil He a t er

4- Way Valve

Electr ical box

CH1 (CH)

4WV

CH2 (SV)

SW1

SW2

EVL

(PMV)

Electronic Expansion Valve

HP

LP

Co n t r o llin g b o a r d

B

A

DC Fa n Mo t o r 1

DC Fa n Mo t o r 2

B

To I n d o or Un i t

A

No t e WH - WH I T E YE-YEL LOW GN-GR EEN RD-RED BU-BLUE



16437010000497

40

AUX DC Inverter LCAC Europe R32 Technical &Service Manual

Part6 Capacity Amendment

1. Operation range

Cooling capacity (K Btu/h)

Power supply

Voltage

Ambient

temperature

Cooling

Heating

12K 18K 24K 30K 36K 42K 48K 60K

220-240V~/50Hz 380-415V~/50Hz

187~242V 342~456V

-15~52℃

-15~24℃

2. Capacity amendment of different ambient temperature

2.1 Amendment coefficient of Cooling capacity under different indoor/outdoor DB/WB temperature K1

IDU temp.℃ Outdoor air inlet DB temperature℃

DB WB -10 0 10 16 25 30 35 40 43 48 52

23 16

1.19 1.12 1.08

1.05 1 0.95 0.90 0.87 0.85 0.82 0.77

25 18

27 19

28 20

30 22

32 24 1.5

Actual cooling capacity calculation:

Actual cooling capacity=amendment coefficient of cooling capacity × nominal cooling capacity ——Rated cooling capacity could be found from【Part 4 Specification】

——Amendment coefficient of cooling capacity could be found from table above.

1.26 1.19 1.12 1.08

1.28 1.26 1.19 1.12 1.08

1.30 1.28 1.26 1.19

1.33 1.30 1.28 1.26

1.33 1.30 1.28

1.05 1 0.95 0.90 0.87 0.85 0.82

1.12

1.19

1.26

1.05 1 0.95 0.90 0.87 0.85

1.08

1.12

1.19 1.12

41

1.05 1 0.95 0.90 0.87

1.08 1.05 1 0.95 0.90

1.08 1.05 1 0.95

AUX DC Inverter LCAC Europe R32 Technical &Service Manual

2.2 Amendment coefficient of Heating capacity under different indoor/outdoor DB/WB temperature K2

IDU temp.℃ Outdoor air inlet DB temperature℃

DB -15 -10 -5 0 7 10 15 20 24

16

18

20

22

24

Actual heating capacity calculation:

Actual heating capacity=amendment coefficient of heating capacity × nominal heating capacity ——Rated heating capacity could be found from【Part 4 Specification】

——amendment coefficient of heating capacity could be found from table above.

0.93 0.97 1 1.06 1.08 1.1 1.14 1.2 1.25

0.87 0.93 0.97 1 1.06 1.08 1.1 1.14 1.2

0.8 0.87 0.93 0.97 1 1.06 1.08 1.1 1.14

0.71 0.8 0.87 0.93 0.97 1 1.06 1.08 1.1

0.62 0.71 0.8 0.87 0.93 0.97 1 1.06 1.08

3. Long piping length

Cooling capacity (K Btu/h)

12K 18K 24K 30K 36K 42K 48K 60K

Connection

Liquid pipe

Pipe(mm)

Gas pipe

Max. piping length(m)

Max. piping height(m)

Max. Bend Qty

Φ6.35 Φ9.52 Φ9.52

Φ12.7 Φ15.88 Φ19.05

25 30 50 65

10 20 25 30

5 8 10

Caution：

1. The standard Pipe length is 5m, if the pipe length is less than this then no additional charging is necessary. If

the pipe length is more than this then you should charge more refrigerant into the system according to the

above Charging Data

2. The thickness of the pipe is 0.6-1.0, bearing pressure is 4.2MPa;

3. If the connection pipe is too long, the cooling capacity and stability would be decreased. And the more bend

quantity, the resistance in the piping system would be bigger, then the cooling and heating capacity would be

decreased even lead to compressor broken. We suggest you to use the shortest connection pipe according to

the pipe length parameter in this manual. If the height difference between outdoor and indoor unit is more than

42

AUX DC Inverter LCAC Europe R32 Technical &Service Manual

C

H

5m, an oil trap should be installed in the gas pipe for every 10 meters.

4. Capacity amendment of different piping length

4.1 Amendment coefficients

Amendment coefficients of heating and cooling capacity under different height drop K3

Different Cooling Capacity modified coefficients at different height:

Height

Differenc

Equivalent pipe

Note:

H = Height of Outdoor Unit － Height of Indoor Unit

Different Heating Capacity modified coefficients at different height:

Height

Differenc

Note:

H = Height of Outdoor Unit － Height of Indoor Unit

Equivalent pipe

4.2 Correction capability

Cooling capacity = Rated cooling capacity xK1xK3

Heating capacity = Rated heating capacity xK2xK3

43

AUX DC Inverter LCAC Europe R32 Technical &Service Manual

5. Equivalent Pipe length conversion

Equivalent pipe length means converting pipe elbow to straight pipe length after considerate the pressure loss.

Bend and Oil Loop Conversion tablet

Type

Pipe Dia.(mm)

6.35 0.10 0.7

9.52 0.18 1.3

12.70 0.20 1.5

15.88 0.25 2.0

19.05 0.35 2.4

22.02 0.40 3.0

Equivalent Pipe length L＝Actual Pipe length L+ Bend Qty× Equivalent pipe bend length+ Oil Loop Qty ×

Equivalent Oil Loop length

Bend（m）

Oil Loop(m)

Sample:

ALCA-H42/5 Actual Pipe length is 25meters, Gas pipe diameter is 15.88mm. If there’s 5 bends and 2 oil loops

during the installation, then the equivalent pipe length should be:

L=25+0.25×5+2.0×2=30.25(m)

Note:

If there is relatively level difference of indoor and outdoor unit, S-shaped oil trap must be installed every 8~10m

for vertical pipe.

44

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3.

ALMD-

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5.

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12/NDR3A 18/NDR3A 24/NDR3A 30/NDR3A 36/NDR3A 42/NDR3A 48/SDR3A

60/SDR3A 2/NDR3HB 8/NDR3HB 4/NDR3HB 0/NDR3HB

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4

AUX DC Inverter LCAC Europe R32 Technical &Service Manual

2. Duct

Auxiliary air duct

Static pressure adjust valve

Air out

Test site：1.4m directly below the center of the duct

Series Models

ALMD-H18/NDR3HA 43 41 40

Auxiliary air duct

Air enter

Test devoice position

Noise level under three speeds of fan (dB(A))

H M L

M Series

ALMD-H18/NDR3HM2 41 39 38

ALMD-H18/NDR3HM2A 44 41 37

ALMD-H24/NDR3HA 44 41 39

ALMD-H24NDR3HM2 43 41 39

ALMD-H30/NDR3HA 46 44 41

ALMD-H30/NDR3HM2 46 44 41

ALMD-H36/NDR3HA 44 41 39

ALMD-H42/NDR3HA 44 41 39

ALMD-H48/SDR3HA 52 49 47

ALMD-H60/SDR3HA 52 49 47

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Series

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Models

H12/NDR3

12/NDR3

H18/NDR3

18/NDR3

H24/NDR3

24/NDR3

H36/NDR3

H42/NDR3

H48/SDR3

H60/SDR3

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Models

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ALCF-

ALCF

ALCF-

H18/NDR3

H24/NDR3

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F2

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F2

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6

AUX DC Inverter LCAC Europe R32 Technical &Service Manual

5. Console

Noise level under three speeds of fan (dB(A))

Models

H M L

ALCO-H12/4R3A

ALCO-H18/4R3A 44 40 37

42 39 36

NC curves

1. ALCO-H12/4R3A

45

40

35

30

25

20

15

Soundpressurelevel（dB）

10

5

0

63 125 250 500 1000 2000

High

Mid

Low

Octavebandcenterfrequency（Hz）

61

AUX DC Inverter LCAC Europe R32 Technical &Service Manual

2. ALCO-H18/4R3A

45

40

35

30

25

20

15

Soundpressurelevel（dB）

10

5

0

63 125 250 500 1000 2000

High

Mid Low

Octavebandcenterfrequency（Hz）

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S

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floor

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YK-H

K-05

Optio

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K-K

K-H

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X

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K-K

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Wired

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XK-05

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AUX DC Inverter LCAC Europe R32 Technical &Service Manual

2. Parameters Setting

Indoor unit’s parameters can be set by remote controller (YK-L) and wired controller—For after-sales (In indoor

side, After the new PCB was replaced, indoor parameters set is necessary).

2.1 Parameter Setting table (General parameter) 【04】【05】【15】

Model

Model of IDU Capacity of IDU Selection of room sensor

ALMD-H18/NDR3HA 12 18 01

ALMD-H18/NDR3HM2 12 18 01

ALMD-H18/NDR3HM2A 12 18 01

ALMD-H24/NDR3HA 12 24 01

ALMD-H24NDR3HM2 12 24 01

ALMD-H30/NDR3HA 12 30 01

ALMD-H30/NDR3HM2 12 30 01

ALMD-H36/NDR3HA 12 36 01 ALMD-H42/NDR3HA 12 42 01 ALMD-H48/SDR3HA 12 48 01 ALMD-H60/SDR3HA 12 60 01

ALCA-H12/NDR3HYA 37 18 00

ALCA-H12/NDR3HY2A 37 18 00

ALCA-H18/NDR3HYA 37 18 01

ALCA-H18/NDR3HY2A 37 18 01

ALCA-H24/NDR3HYB 01 24 01

ALCA-H24/NDR3HY2A 01 24 01

ALCA-H36/NDR3HYB 01 36 01 ALCA-H42/NDR3HYB 01 42 01 ALCA-H48/SDR3HYB 01 48 01 ALCA-H60/SDR3HYB 01 48 01

ALCF-H18/NDR3HF 46 18 02

ALCF-H18/NDR3HF2 46 18 02

ALCF-H24/NDR3HF 46 24 02

ALCF-H24/NDR3HF2 46 24 02

ALCF-H36/NDR3HF 46 36 02 ALCF-H42/NDR3HF 46 48 02 ALCF-H48/SDR3HF 46 48 02 ALCF-H60/SDR3HF 46 60 02

Note:

【04】：【05】：

Model of IDU Capacity of IDU

66

AUX DC Inverter LCAC Europe R32 Technical &Service Manual

【15】：Selection of air return temperature sensor; 00 – sensor in indoor unit, 01—Sensor in wired controller

2.2 Working mode parameter (Heating only function)

Under heating only mode, IDU cannot receive signal of other working mode besides “OFF” signal.

Once change the parameter, need to power on again to activate the function

SeriesNo Value Meaning Availablemode

0

1

Allmode Cooling.Dehumidification.Swing.Heating.Auto

No“Auto”mode Cooling.Dehumidification.Swing.Heating

11

2

3

Cooling Cooling.Dehumidification.Swing

Heating Heatingonly

Note:

The duct type indoor unit produced before 2019.3 need to update program for IDU PCB so that achieve

heating only.

2.3 Parameter Setting by YK-L

Enter the setting interface

① Make sure the remote controller is off ② Press the two white button at the down side simultaneously more than 10s to enter the address setting

mode.

Parameter Setting

③ Press the [∧] or [∨] button to change the parameter series number ④ Press the [IClean] or [ECO] button to change the parameter correspondence ⑤ Press the [MODE] button to send order (Sent signal to display panels or receivers), Then can hearing

buzzer once

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UX DC I

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AC Euro

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F

r exampl

If

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un

it , check th

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:

change the

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Press th

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AC Euro

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p

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4

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UX DC I

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AC Euro

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echnical &Service Manual

Cassett

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bile termi

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setting

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Capaci

18k/Bt

24k/Bt

30k/Bt

36k/Bt

42k/Bt

48k/Bt

60k/Bt

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T

UX DC I

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AC Euro

e R32

echnical &Service Manual

【Step 2】

t

enter th

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【Step 3】

fi

rst 2 numb

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set inter

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UX DC I

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AC Euro

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ES

setting t

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echnical

&Service

Manual

ES

paramet

ES

paramet

【Step 5】

s shown in

(Pa)

r values

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r values

ress “FUN

the picture

0

0600

90

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0601 0

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UX DC I

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AC Euro

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echnical

&Service Manual

【Step 7】

5

S again ，

inkle ,the

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the last 2

Press “△

nfirm the

】

Press

“FUNCTI

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”button c

SP of IDU

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07XX” will

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UX DC I

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AC Euro

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echnical

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Manual

1.

Outdoo

1.

AL-H12/ in PCB：

r Unit P

NDR3A(U

B

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/NDR3A(

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AC Euro

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echnical &Service Manual

8

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a

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AC Euro

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AC Euro

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ive Modu

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UX DC I

2.

Indoor

2.

.Cassett

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nit PC

(12~60

AC Euro

)

e R32

echnical &Service Manual

.Ceiling

Floor (1

2~60K)

8

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3

a

L

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N

A

2

p

7

T

M

UX DC I

2.

Duct (1

M

in PCB

verter LC

K~60K)

AC Euro

e R32

echnical

&Service Manual

A

MD-H18/

DR3HM

A

Driver

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AAL2.4AL

n

N

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p

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8

T

UX DC I

verter LC

AC Euro

e R32

echnical &Service Manual

MD-H18/

DR3HM

A

Consol

CO-H12/

R3A、A

CO-H18/

R3A

8

AUX DC Inverter LCAC Europe R32 Technical &Service Manual

89

A

2

n

e

C

A

u

p

e

o

0

T

P

t

UX DC I

verter LC

AC Euro

e R32

echnical

&Service

Manual

1.

High T

mperat

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ction

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. Over

urrent

Protecti

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9

A

3

4

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UX DC I

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AC Euro

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91

echnical &Service Manual

. High

. Low

ressur

Protec

Protect

ion

AUX DC Inverter LCAC Europe R32 Technical &Service Manual

Part12 Electric Characteristic

power supply current

model

Hz voltage MCA MOP

AL-H12/NDR3A(U)

AL-H12/NDR3HB2(U) 220-240 / 9 35

AL-H18/NDR3A(U) 220-240 / 12 40

AL-H18/NDR3HB2(U) 220-240 / 12 40

ALMD-H18/NDR3HM2A 220-240 / 12A 40

AL-H24/NDR3A(U) 220-240 / 16 69

AL-H24/NDR3HB2(U) 220-240 / 16 65

AL-H30/NDR3A(U) 220-240 / 23.5 120

50/60

220-240 / 11 40

ODU fan motor input （

kW）

AL-H30/NDR3HB2(U) 220-240 / 16 65

AL-H36/NDR3A(U) 220-240 / 23.5 120

AL-H42/NDR3A(U) 220-240 / 24.9 120

AL-H48/SDR3A(U) 380-415 / 15 200

AL-H60/SDR3A(U) 380-415 / 15 200

92

AUX DC Inverter LCAC Europe R32 Technical &Service Manual

Part13 Trouble Shooting

CA/ CF/ Duct /Co: Ceiling floor /Cassette/Duct/Console unit; WM: wall mounted unit

1. Failure code display

ERROR

CODE

A1

A2

A3

A4

A5 Fault with the drainage

A6

Fault with the room temperature sensor on the Indoor unit

Fault with the temperature sensor in the middle of indoor evaporator

Fault with the liquid pipe temperature sensor on the indoor unit

Fault with the gas pipe temperature sensor on the indoor unit

Fault with the Fan motor of indoor unit

DESCRIPTION Causes of possible failure

Damage of the room temperature sensor on the indoor unit Poor contact of the room temperature sensor on the indoor unit Damage of wiring of the room temperature sensor on the indoor unit

Damage of the main PCB on the indoor unit Damage of the temperature sensor on the indoor

unit Poor contact of the temperature sensor on the indoor unit Damage of wiring of the temperature sensor on the indoor unit

Damage of the main PCB on the indoor unit Damage of the liquid pipe temperature sensor on the

indoor unit Poor contact of the liquid pipe temperature sensor on the indoor unit Damage of wiring of the liquid pipe temperature sensor on the indoor unit

Damage of the main PCB on the indoor unit Damage of the gas pipe temperature sensor on the

indoor unit Poor contact of the gas pipe temperature sensor on the indoor unit Damage of wiring of the gas pipe temperature sensor on the indoor unit

Damage of the main PCB on the indoor unit

Float switch disconnected or poor wiring

Error setting of model parameters

Drain plug

Damage of the pump

Low voltage

Poor wiring

Damage of the main PCB on the indoor unit

Damage of the motor

93

AUX DC Inverter LCAC Europe R32 Technical &Service Manual

ERROR

CODE

A8

A9

AA

H1 Fault with the high-pressure switch

H4 Fault with the low-pressure switch

C1

C2

C3

C6

Indoor unit EEPROM module failure

Communication error between the outdoor unit and the indoor unit

Communication error between the wired controller and main PCB of the indoor unit

Fault with the Environmental temperature sensor on the outdoor unit

Fault with the defrosting temperature sensor on the outdoor unit

Fault with the discharge temperature sensor

Fault with the suction temperature Sensor

DESCRIPTION Causes of possible failure

Indoor unit PCB is broken

EEPROM module is broken.

Damage of the main PCB on the indoor unit

Damage of the main PCB on the outdoor unit

Poor wiring

Damage of the wired controller

Damage of the main PCB on the indoor unit

System pipeline blockage

Damage of the pressure switch

Lack of the refrigerant

Stop valve unopened

Damage of the pressure switch Damage of the Environmental temperature sensor

on the outdoor unit Poor contact of the Environmental temperature sensor on the outdoor unit Damage of wiring of the Environmental temperature sensor on the outdoor unit

Damage of the main PCB on the outdoor unit Damage of the defrosting temperature sensor on

the outdoor unit Poor contact of the defrosting temperature sensor on the outdoor unit Damage of wiring of the defrosting temperature sensor on the outdoor unit

Damage of the main PCB on the outdoor unit Damage of the discharge temperature sensor on the

outdoor unit Poor contact of the discharge temperature sensor on the outdoor unit Damage of wiring of the discharge temperature sensor on the outdoor unit

Damage of the main PCB on the outdoor unit Damage of the suction temperature sensor on the

outdoor unit Poor contact of the suction temperature sensor on the outdoor unit Damage of wiring of the suction temperature sensor on the outdoor unit

Damage of the main PCB on the outdoor unit

94

AUX DC Inverter LCAC Europe R32 Technical &Service Manual

ERROR

CODE

Fault with the temperature sensor in

C8

J2

J3

J7 Fault with the outdoor unit EPROM Chip damage

E1 Fault of four-way valve

E3

E8

FH

31

32

33 Module software protection

34 Compressor start failure Compressor power line not connected

35

36

37

the mid of outdoor condenser

Communication error between the outdoor unit and the indoor unit

Communication error between the driver PCB and main PCB of the outdoor unit

Protection high temperature discharge

Fault with anti-high temperature protection of indoor unit in heating model

Protection lower temperature discharge

Fault with the inverter module protection Compressor drive hardware protection

Fault with the over-electric current protection

Fault with the over-voltage or low voltage protection

Fault with the modular temperature sensor on the outdoor unit

DESCRIPTION Causes of possible failure

Damage of the temperature sensor on the outdoor unit Poor contact of the temperature sensor on the outdoor unit Damage of wiring of the temperature sensor on the outdoor unit

Damage of the main PCB on the outdoor unit

Damage of the main PCB on the indoor unit

Damage of the main PCB on the outdoor unit

Poor wiring

Damage of the driver PCB on the outdoor unit

Damage of the main PCB on the outdoor unit

Poor wiring

Damage of four-way valve

Damage to coil of four-way valve

Lack of the refrigerant

Stop valve unopened

Damage of the main PCB on the outdoor unit

Outdoor condenser viscera

Indoor evaporator viscera

Temperature sensor shedding

Damage of the main PCB on the outdoor unit

Fault with the inverter module protection

Damage of the EE chip of driver board

Supply voltage below level let the current excessive

Supply voltage exceed limit

Outdoor fan stops or low speed

Excessive running current of the unit

Voltage drops abruptly in operation

Excessive input voltage

Lower input voltage

Sensor damage of compressor IPM module

95

AUX DC Inverter LCAC Europe R32 Technical &Service Manual

ERROR

CODE

38

39

3H Fault with the Fan motor of outdoor unit Damage of motor

3C

3J

3E

3F

41

99

9A

9H Failure of indoor DC fan start-up

9C

9J

9E

9F

Fault with the Compressor Power supply Phase efficiency protection Protection of compressor driving module for excessive temperature

Overcurrent protection of outdoor DC motor Overvoltage protection of outdoor DC motor

Compressor drive PFC software protection

Compressor drive PFC hardware protection

IPM protection for driving board of outdoor DC fan

Communication error between the driver PCB and main PCB of the indoor unit

Temperature protection of indoor DC fan module B L5

Overcurrent protection of indoor DC motor Overvoltage and undervoltage protection of indoor DC motor IPM protection for driving board of indoor DC fan EE protection for driving board of indoor DC fan

DESCRIPTION Causes of possible failure

Compressor power line not connected

Poor contact between compressor IPM module and radiator

High speed of DC motor

Low voltage output

Excessive running current of the unit

Voltage drops abruptly in operation

Damage of the PFC circuit components

Reactor damage

Damage of IPM components of DC fan

Abnormal power supply of fan driving board Poor contact of the communication line of fan drive

board Damage of fan driving board

Damage of fan driving board

Damage of fan motor

High speed of DC motor

Excessive running current of fan motor

Excessive input voltage

Lower input voltage

Sensor damage of Dc motor IPM module

Damage of EE chip of Driver board

96

A

1

n

W

A

s

t

p

m

i

7

e

T

UX DC I

2.

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2.

【AA】

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analysi

ired con

AC Euro

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municat

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echnical &Service Manual

9

A2.2

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p

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o

UX DC I

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AC Euro

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echnical

&Service Manual

【A9】C

ommunic

tion fail

re betwe

n indoor

and outd

or unit

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u

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o

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p

q

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UX DC I

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tdoor pr

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tection (

AC Euro

hase se

e R32

uence)

echnical &Service Manual

9

AUX DC Inverter LCAC Europe R32 Technical &Service Manual

2.3【H1】high pressure protection Cooling high pressure protection

100