MAXA BDS28A, BDS35A Technical Manual

TECHNICAL MANUAL 2013

SPLIT MONO DC INVERTER

MODELS

BDS28A

BDS35A

This manual has been created for informative purpose. The company declines every responsibility for the results of projecting or installation based on the explanations and the technical specifications given

in this manual. Is besides forbidden the reproduction under any form of the texts and of the figures contained in this manual.

Serie / Series / Serie / Serie

TECHNICAL MANUAL

MONO DC INVERTER

Emissione / Issue
Ausgabe / Emission

04 - 2013

Catalogo / Catalogue / Katalog / Catalogue

Sostituise / Supersade
Ersetzt / Remplace

-

MTE01028D2505-00

2

Index

1. SPECIFICATIONS ......................................................................................................................................4

2. CHARACTERISTICS DATA........................................................................................................................ 6

2.1 Operation characteristic curve .................................................................................................................. 6

2.2 Capacity variation ratio according to temperature .................................................................................... 6

2.3 Noise criteria curve ................................................................................................................................... 6

2.4 Operation data .......................................................................................................................................... 6

3. DIMENSIONS ...........................................................................................................................................7

3.1 Indoor units ............................................................................................................................................... 7

3.2 Outdoor units ............................................................................................................................................7

4. REFRIGERANT DIAGRAM ......................................................................................................................8

5. ELECTRICAL CIRCUIT DIAGRAM ........................................................................................................... 9

5.1 Indoor units ............................................................................................................................................... 9

5.2 Outdoor units ............................................................................................................................................9

6. PRINTED CIRCUIT BOARD.....................................................................................................................10

6.1 Indoor units ............................................................................................................................................. 10

6.2 Outdoor units ..........................................................................................................................................10

7. CONTROL FUNCTIONS .........................................................................................................................11

7.1. Temperature parameters ....................................................................................................................... 11

7.2. Basic functions.......................................................................................................................................11

8. TROUBLESHOOTING ............................................................................................................................15

8.1 Malfunction diagnosis should be performed as below procedure...........................................................15

8.2 Confirmation ...........................................................................................................................................15

8.3 Flashing LED of Indoor/Outdoor unit and primary judgement ................................................................16

8.4. How to check simply the main parts ...................................................................................................... 21

Appendix 1: form for indoor/outdoor unit’s ambient sensor numerical value of resistance ......................... 32

Appendix 2: form for indoor/outdoor unit’s tube temperature sensor numerical value of resistance ..........33

Appendix 3: form for indoor/outdoor unit’s air exhaust temperature sensor numerical value of resistance..34

3

1. SPECIFICATIONS

Models of indoor units BDS28A BDS35A

Rated voltage 220-240V ~50Hz

Total capacity

Cooling

Heating

Air flow volume (SH/H/MH/M/ML/L/SL) m³/h 730/670/610/530/460/410/380 770/670/610/530/460/410/380

Dehumidifying volume l/h 0,8 1,4

Fan motor cooling speed (Max - Min) r/min 1300/1050/1000/900/800/700/500 1350/1070/1000/900/800/700/500

Fan motor heating speed (Max - Min) r/min 1300/1150/1080/1030/980/900/850 1350/1150/1080/1030/980/900/850

Output of fan motor W 15 15

Fan motor capacitor μF / /

Fan motor RLA A 0,07 0,07

Fan type - piece Cross flow - 1 Cross flow - 1

Diameter x length mm Φ98 x 662 Φ98 x 662

Indoor unit

Evaporator

Swing motor model MP24HA/MP24HB/MP24HC MP24HA/MP24HB/MP24HC

Output of swing motor W 2,4 2,4

Fuse A 3,15 3,15

Sound pressure level dBA 36/32/21 36/32/21

Sound power level dBA 46/42/31 46/42/31

Dimension (W/H/D) mm 866 x 292 x 209 866 x 292 x 209

Dimension of package (W/H/D) mm 945 x 377 x 297 945 x 377 x 297

Net weight/gross weight kg 11/14 11/14

Models of outdoor units BDS28A BDS35A

Compressor manufacturer/trademark SANYO

Compressor model C-6RZ110H1A C-6RZ110H1A

Compressor oil FV50S FVC 68D / RB 68EP

Compressor type ROTARY ROTARY

L.R.A. A 33,00 33,00

Compressor RLA A 4,59 4,59

Compressor power input W 800 800

Overload protector 1NT11L-3979 1NT11L-3979

Throttling method Electronic expansion valve

Starting method 16°C ~ 30°C

Working temperature range (°C) -20°C ~ 48°C

Outdoor unit

Condenser

Fan motor speed rpm 850/750/600 850/750/600

Output fan motor W 40 40

Fan motor RLA A 0,23 0,23

Power input W 520 900

Rated current A 2,3 4,0

S.E.E.R. W/W 7,5-A++ 7-A++

Total capacity

Power input W 565 895

Rated current A 2,37 7,5

S.C.O.P.

Evaporator type Aluminium Fin-copper Tube

Pipe diameter mm Φ7 Φ7

Row-fin gap mm 2-1.5 2-1,5

Coil length x height x width (l x H x L) mm 662 x 25,4 x 305 662 x 25,4 x 305

Condensor type Aluminium Fin-copper Tube

Pipe diameter mm Φ7,94 Φ7,94

Rows-fin gap mm 2,5-1,5 2,5-1,5

Coil length (l) x height (H) x width (L) mm 763 x 57 x 550 730 x 38.1 x 508

kW 2,5(0,7 ~ 4,4) 3,5(0,7 ~ 4,5)

Btu/h 8,53(2,3 ~ 15,00) 11,9(2,3 ~ 15,3)

kW 2,7(0,7 ~ 4,8) 3,5(0,7 ~ 5,5)

Btu/h 9,3(2,4 ~ 16,3) 12,4(2,4 ~ 18,7)

W/W

4,6 – A++ 4,6 – A++

4

g

[

]

Fan motor capacitor μF / /

Air flow volume of outdoor unit m³/h 2000 2000

Fan type-piece Axial-flow

Fan diameter mm Φ445 Φ445

Defrosting method Automatic Defrosting

Climate type T1 T1

Isolation I I

Moisture protection IP24 IP24
Permissible excessive operating pressure

for the dischar
Permissible excessive operating pressure
for the suction side

Sound pressure level dB(A) 49/-/- 50/-/-

Sound power level dB(A) 59/-/- 60/-/-

Dimensions (WXHXD) mm 906 x 596 x 378 906 x 596 x 378

Dimension of package (L/W/H) mm 948 x 420 x 645 348 x 420 x 645

Net weight/gross weight kg 43/47 43/47

Refrigerant charge (R410A) kg 1,3 1,3

Length m 5 5

Gas additional charge g/m 20 20

Outer diameter

Max distance

Connecting pipe

e side

Liquid pipe mm Φ6 Φ6

Gas pipe mm Φ9,52 Φ9,52

Height m 10 10

Length m 15 20

Mpa 3,8 3,8

Mpa 1,2 1,5

The above data of specifications are subject to change without prior notice. Please refer to the actual data specified on the nameplate of

the unit.

Note: Test conditions:

Standard condition

Rated cooling 27 19 35 24

Rated heating 20 15 7 6

3) Microphone at a distance of 1m from the unit.

Approximate calculation from Sound Pressure Level to Sound Power Level:

- Average Sound Pressure Level

L

: Sound pressure level of front test point.

1P

L

: Sound pressure level of side test point for indoor unit

2P

- Approximate Sound Power Lever

Dry bulb temp. °C Wet bulb temp. °C Dry bulb temp. °C Wet bulb temp. °C

Indoor side state Outdoor side state

*1.0*1.0

LL

21

L

L

=10*lg

p

=

W

+

L

+10.

L

p

PP

1010(*2/1

1P

.

L

,

.

2P

5

0

2. CHARACTERISTICS DATA

2.1 Operation characteristic curve

Cooling

10

Condition
Indoor:DB27
Outdoor:DB35 WB24

8

Indoor air flow: Super High
Pipe length: 5m

6

4

Current (A)

2

0

WB19

BDS35A

BDS28A

Compressor speed (rps)

2.2 Capacity variation ratio according to temperature

200

180

160

140

120

100

80

60

Capacity ratio(%)

40

20

0

33 35 37 39 41 43 45

BDS28A

BDS35A

Condition
Indoor:DB27
Indoor air flow: Super High
Pipe length: 5m

WB19

Outdoor temp.( )

2.3 Noise criteria curve

50

45

40

35

30

25

Noise/dB(A)

20

15

10

Super High

BDS35A

BDS28A

High Middle Low Quiet

Indoor fan motor rotating speed (rps)

2.4 Operation data

Heating

10

Condition
Indoor:DB20
Outdoor:DB7

8

Indoor air flow:Super High
Pipe length: 5m

6

4

Current (A)

2

0

505151 0 20 30 40 60 70 80 90020304060708090

BDS35A

BDS28A

Compressor speed (rps)

gnitaeHgnilooC

200

180

160

140

120

100

80

60

Capacity ratio(%)

40
20

0

-18 -14 -10 -6 -2 2 6 1

BDS28A

BDS35A

Condition
Indoor:DB20
Indoor air flow:Super High
Pipe length: 5m

Outdoor temp.( )

tinUroodtuOtinUroodnI

55

50

45

Noise/dB(A)

40

35

30

0 8 20 30 40 50 60 70 80 90

Compressor speed (rps)

BDS35A

BDS28A

Cooling:

Temperature

conditions (°C)

Indoor Outdoor

27/19 35/24

Model

name

BDS28A

BDS35A

Standard

pressure

Heat exchanger pipe

temp.

P(MPa) T1 (°C) T2 (°C)

0,9~1,2

In: 12~14

Out: 10~12

In: 41~43

Out: 43~45

Indoor fan speed

Outdoor fan

speed

Super high Super High

Compressor

revolution (rps)

34

55

6

Heating:

Temperature

conditions (°C)

Indoor Outdoor

20/15 7/6

Model

name

BDS28A

BDS35A

Standard

pressure

P(MPa) T1 (°C) T2 (°C)

2,0~2,6

Heat exchanger pipe

temp.

In: 33~35

Out: 42~44

In: 3~5

Out: 3~5

Indoor fan speed

Super high Super high

Outdoor fan

speed

Notes:

(1) Connecting piping condition: 5m.

(2) T1: Outlet and inlet pipe temperature of evaporator.

T2: Outlet and inlet pipe temperature of condenser.

P: Pressure of air pipe used for connecting outdoor and indoor units.

Notes:

(1) Measure surface temperature of heat exchanger pipe around center of heat exchanger path U bent.

(Thermistor thermometer)

(2) Connecting piping condition: 5m.

3. DIMENSIONS

3.1 Indoor units

866

209

Compressor

revolution (rps)

41

55

3.2 Outdoor units

541162 163

7

4. REFRIGERANT DIAGRAM

TINUROODTUOTINUROODNI

GAS SIDE

HEAT
EXCHANGE

(EVAPORATOR)

3-WAY VALVE

LIQUID SIDE

2-WAY VALVE

Discharge

Suction

COMPRESSOR

4-Way valve

Accumlator

Electron expansion valve

HE AT
EXCHANGE

(CONDENSER)

reniartSreniartS

COOLING

HEATING

8

5. ELECTRICAL CIRCUIT DIAGRAM

5.1 Indoor units: BDS28A, BDS35A

FAN

MOTOR

M1

DC-MOTOR

CAP

JUMP

SWING-LR

M2

SWING

ROOM

TEMP.SENSOR

0

TUBE

TEMP.SENSOR

0

RT2RT1

ROOM TUBE

AP2

PRINTEDCIRCUITBOAR D

SWING-UD1

M3

SWING

MOTOR(U.D1)MOTOR(L.R)

RECEIVER AND

DISPLAYBOARD

AP1

SWING-UD2

M4

SWING

MOTOR(U.D2)

MAGNETIC

RING

N

DISP2DISP1

AC-L

COM-OUT

L-OUT

K7

HEALTH-L HEALTH-N

RD BU

COOL PLASMA

GENERATOR

L

L

BN(BK)
BU(WH)

POWER

L

N

YEGN(GN)

BU
BK
BN

XT1
N(1)

2
3

CONN WIRE

BU
BK
BN

YEGN

TERMINAL

BOARD

OUTDOOR UNIT

PE

YEGN

EVAPORATOR

YEGN

PE

5.2 Outdoor units: BDS28A, BDS35A

SAT

W3YEGN

PE

W10RD

YEGN

PE

XT2

BU

INDOOR UNIT

N(1)

BK
BN

L1

2

L1

3

W2BU

W4BK

W1BN

E

OVC-COMP CN2

N1

COMU
AC-L1

OFAN1

M

FAN

CN1

EKV

PE

TUBE

TEM.SENSOR

RT1

0

4V AC-L2

RT2

4YV

OUTROOM

TEM.SENSOR

0

L3

EXHAUST

TEM.SENSOR

RT3

0

LX-2

W11

L2 L2 L2

W5BU

COMP-U

AP1

LX-1

L3

L

COMP

R

COMP

S

W7RD

W6YE

COMP-V COMP-W

W12

W13WH

WHOG

P

HP

E

C

HPP

W8YEGN

HEAT-N2 HEAT-L

(CHASSIS)

PE

N2 N3

EH2

HEATER

W9BU

HEAT-N1

RD RD

EH1

HEATER

(COMP)

9

6

7

6. PRINTED CIRCUIT BOARD

6.1 Indoor unit: BDS28A, BDS35A

12345

15

14

13

6.2 Outdoor units: BDS28A, BDS35A

No Part name

1 DC fan

2 Microswitch

3 Electrostatic precipitation

4 Small up & down swing interface

5 Left and right

Big up & down swing interface

6

7 Display interface

8 Ambient temperature sensor

9 Tube temperature sensor

Outdoor unit live wire

10

Input interface of live wire for

11

indoor unit

Health

12

Fuse

13

Interface of neutral wire for

14

indoor and outdoor units

Communication interface of

8911 1012

15

indoor and outdoor units

No Part name

1 Input of neutral wire of power

2 Input of live wire of power

Communication interface

3

Interface 1 of electric reactor

4

Interface 2 of electric reactor

5

6 Interface of fan

Neutral wire of electric heater of

7

chassis

Neutral electric wire of

8

compressor

9 Neutral wire of 4-way valve

Live wire of 4-way valve

10

Live wire of electric heater

11

Input of overload

12

Temperature sensor

13

U, V, W three phases of

14

compressor

15 Input of ground wire of power

10

7. Control functions

7.1. Temperature Parameters

• Indoor preset temperature (Tpreset)

• Indoor ambient temperature (T

amb)

7.2. Basic functions

Once energized, the compressor should in no way be restarted unless after at least 3-minute time interval. In case of having

memory function, for the first energization, the compressor will be started without 3-minute lag, if being under the condition

of power-off, and the compressor will have 3-minutes delay to be started under the condition of power-on. Once started, the

compressor will not be stopped within 6 minutes with the changes of room temperature.

7.2.1 Cooling Mode

 Cooling Condition and Process

When T

and the indoor fan will run at preset speed.

When T

at preset speed.

When T

■ Under this mode, the switchover (reversal) valve will be de-energized and the temperature can be set from 16°C to 30°C.

If the compressor is shut down for some reason, the indoor fan and the swing device will operate at the original state.

amb. ≥ Tpreset , the unit will run under cooling mode, in which case the compressor and outdoor fan will be started,

amb. ≤ Tpreset -3°C, the compressor will stop, the outdoor fan will stop with time lag of 30s, and the indoor fan will run

preset -3°C <Tamb. < Tpreset , the unit will maintain its original operating status.

Tpreset

Tpreset –2 ˚C

Tamb.

≥ 6 min. ≥ 3 min. ≥ 6 min.

Start cooling

Original operating status

Stop cooling

Compressor

Outdoor fan

Indoor fan

Run

Setting fan speed

Stop

 Protection function

♦ Overcurrent protection

If total current is high, the compressor will run in limited frequency. If total current is too high, the compressor will stop, the

outdoor fan will delay 30 seconds to stop, indoor unit will display E5 and outdoor yellow light will blink 5 times.

♦ Antifreeze protection

When the antifreeze protection is detected, the compressor will stop, the outdoor fan will stop after 30 seconds, and the

indoor fan and swing motor will keep running in the original mode. When antifreeze protection is eliminated and the
compressor has stopped for 3 minutes, the compressor will resume running in the original mode.

The period ofantifreezing protection

Compressor

3 min

Outdoor fan

Indoor fan

Low fan speed

Run

Stop

11