Fedders GWH18MC-D3DNA1A/O User manual

Service Manual

MODEL :

(Refrigerant R-410A)

BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

GWH18MC-D3DNA3A

GWH24MD-D3DNA3A

ONLY FOR AUTHORIZED SERVICE PERSONNEL.

2.1 Unit Specifications.....................................................................................................................3

2.2 Operation Characteristic Curve.................................................................................................7

2.3 Capacity Variation Ratio According to Temperature................................................................8

2.4 Operation Date.............................................................................................................................8

2.5 Noise criteria curve tables for both models...............................................................................9

3.1 Indoor Unit..................................................................................................................................10

3.2 Outdo or Unit...............................................................................................................................11

5.1 Electrical wiring...........................................................................................................................14

5.2 Printed Circuit Board..................................................................................................................15

6.1 Remote Control Operations......................................................................................................17

6.2 Changing batteries and notice.....................................................................................................21

6.3 Description of each control operation........................................................................................23

10.1 Removal Procedure of Indoor Unit...........................................................................................72

10.2 Removal Procedure of Outdoor Unit......................................................................................76

Part 4 Refrigerant System Diagram........................................................................33 Part 4 Refrigerant System Diagram........................................................................33

Malfunction Analysis

Error Code List

Troubleshooting

1

Summary and features

Indoor Unit

Outdoor Unit

Remote control window

YB1FAF

Summary and features

GWH18MC-D3DNA3A

GWH24MD-D3DNA3A

GWH18MC-D3DNA1A/O

GWH24MD-D3DNA1A/O

2

1.Safety Precautions

Safety Precautions

Important!

This air conditioning system meets strict safety and

operating standards. As the installer or service person,

it is an important part of your job to install or service the

system so it operates safely and efficiently.

Follow each installation or repair step exactly as shown.

Observe all local, state, and national electrical codes.

Pay close attention to all warning and caution notices

given in this manual.

To prevent injury to the user or other people and

property damage, the following instructions must

be followed.

About the pictXUHV :

Erroneous handing gives a high possi-

bility to induce serious results such as

death or heavy injury.

Erroneous handing may induce serious

injury depending on the situation.

Do not supply power to the unit until all wiring and tubing

are completed or reconnected and checked.

Highly dangerous electrical voltages are used in this

system. Carefully refer to the wiring diagram and these

instructions when wiring. Improper connections and inad-

equate grounding can cause accidental injury or death.

Ground the unit following local electrical codes.

Connect all wiring tightly. Loose wiring may cause over-

heating at connection points and a possible fire hazard.

All electric work must be performed by licensed technician, ac-

cording to local regulations and the instructions given in this

manual.

There is risk of fire, electric shock, explosion, or injury.

Ask your dealer or specialized subcontractor for installation or

repair work.

Make sure the ceiling/wall is strong enough to hold the

unit’s weight. The outdoor unit shouOd be installed in a

location where air and noise emitted by the unit will not

disturb the neighbors.

Properly insulate any tubing run inside a room to prevent

"sweating" that can cause dripping and water damage to

walls and floors.

The outdoor unit must be installed on stable, level surface,

in a place where there is no accumulation of snow, leaves

or rubbish.

The unit should be installed according to the instructions

in order to minimize the risk of damage from earthquakes,

typhoons or strong winds.

When the refrigerant touches the fire eWc., it was decomposed

and a poisonous gas is generated.

Use only the specified refrigerant to charge the reIrigerant

circuit.

Do not mix it with any other refrigerant and do not allow air to

remain in the circuit.

Air enclosed in the circuit can cause high pressure resulting

in a rupture and other hazards.

After completing installation work, make sure that refriger-

ant gas has not leaked.

The limit density is made not to be exceeded even if the refrig-

erant leaks by any chance.

Turn the power off at the main power box (mains) before open-

ing the unit to check or repair electrical parts and wiring.

Keep your fingers and clothing away from any moving parts.

Clean up the site after you finish, remembering to check that

no metal scraps or bits of wiring have been left inside the unit

being serviced.

The unit must be properly earth connected.

Caution

Warning

Caution

Never inVtall on the place where a combustible gas might

leak. The gas may ignite or explode when the gas leaks and

collects in surround of the unit.

When the unit is installed at telecommunication centers or

hospitals, take a proper provision against noise.

When installing at a watery place, provide an electric leak

breaker.

Do not wash the unit with water.

Be very careful about unit transportation. The unit should not

be carried by only one person if it is more than 20kg. It occasion-

ally causes the damage of the unit and health to be impaired.

Do not touch the heat exchanger fins wLth your hands.

Doing so may cut your hands.

Do not touch the compressor or refrigerant piping without

wearing glove on your hands. Touching directly such part can

cause a burn or frostbite as it becomes high or low temperature

according to the refrigerant state.

Do not operate the air conditioner without the air filter set

place. Dust may accumulate, and cause a failure.

At emergency (if you smell something burning), stop opera-

tion and turn the power source switch off.

3

2.Specifications

2.1 Unit Specifications

Specific ations

The above data is subject to change without notice. Please refer to the nameplate of the unit.

tinU roodnI fo ledoM

Fan Motor Speed (r/min) (SH/H/M/L)

)W( rotoM naF fo tuptuO

)W( retaeH fo rewoP tupnI

Fan Motor Capacitor (μ )F

Fan Motor RLA(A)

eceiP-epyT naF

Diameter-Length (mm)

rotaropavE

Pipe Diameter (mm)

)mm(paG niF-woR

Coil length (l) x height (H) x coil

width (L)

ledoM rotoM gniwS

)W( rotoM gniwS fo tuptuO

)A( esuF

Sound Pressure Level dB (A)

(SH/H/M/L)

Sound Power Level dB (A)

(SH/H/M/L)

)mm ( )D/H/W( noisnemiD

Dimension

of Package (L/W/H)(

mm)

)gk( thgieW ssorG/ thgieW teN

Model

Function

Product Code

Rated Voltage

Frequency(Hz)

Total Capacity (W) Standard (Low~High)

Total Capacity (Btu/h) Standard (Low~High)

Power Input (W) Standard (Low~High)

Rated Input (W)

Rated Current (A)

Air Flow Volume (m

3

/h) (SH/H/M/L)

Dehumidifying Volume (l/h)

EER / C.O.P (W/W)

ssalC ygrenE

Indoor

unit

HEATING

7325

（

1200~7325

）

25000

（

4100~25000

）

2750

（

335~2750

）

2750

12.6

3.52

1350/1200/1050/

900

GWH18MC-D3DNA3A

COOLING

CB171N0040

208-230V~

60Hz

5275

（

1750~6550

）

18000

（

6000~22350

）

1500

（

300~2650

）

2650

12

850/780/650/550

2

2.66

0.81=REES

HSPF=10.2

（

Region

Ⅳ）

HSPF=8.8

（

Region

Ⅴ）

GWH18MC-D3DNA3A/I

1420/1250/1150/

1050

20

/

1.5

0.25

Cross flow fan – 1

Φ98X710

Aluminum fin-copper tube

Φ7

2-1.4

715X304.8X25.4

MP28VB

940X298X200

1010X285X380

13/17

2.5

PCB 3.15A Transformer 0.2A

46/44/40/35

56/54/50/45

4

The above data is subject to change without notice. Please refer to the nameplate of the unit.

Specific ations

Liquid Pipe (mm)

Gas Pipe (mm)

Height (m)

Length (m)

Outdoor

unit

Model of Outdoor Unit

Compressor

Manufacturer/trademark

Compressor Model

Compressor Type

L.R.A. (A)

Compressor RLA(A)

Compressor Power Input(W)

Overload Protector

Throttling Method

Starting Method

Working Temp Range (

℃

)

Condenser

Pipe Diameter (mm)

Rows-Fin Gap(mm)

Coil length (l) x height (H) x coil

width (L)

Fan Motor Speed (rpm) (H/M/L)

Output of Fan Motor (W)

Fan Motor RLA(A)

Fan Motor Capacitor (μF)

Air Flow Volume of Outdoor Unit

（

m

3

/h

）

Fan Type-Piece

Fan Diameter (mm)

Defrosting Method

Climate Type

Isolation

Moisture Protection

Permissible Excessive Operating

Pressure for the Discharge

Side(MPa)

Permissible Excessive Operating

Pressure for the Suction Side(MPa)

Sound Pressure Level dB (A)

Sound Power Level dB (A)

Dimension (W/H/D) ( mm)

Dimension of Package (L/W/H)(

mm)

Max Distance

Net Weight /Gross Weight (kg)

Refrigerant and Charge (k

g)

edoC tcudorP

Connecti

on Pipe

Length (m)

Gas additional charge(g/m)

Outer Diameter

5

≤

T

≤

46 -15

≤

T

≤

China Resources (Shenyang) Sanyo

CO.,LTD

C-6RZ146H1A

Twin rotary compressor

41

8.4

1640

1NT11L-3979

Electric expand valve

Transducer starting

Aluminum fin-copper tube

7

2-1.4

837X660X38.1

690/500

60

0.62

3

3200

Axial fan –1

Φ520

Auto defrost

T1

I

IP24

3.8

1.2

54

64

890X700X340

1030X460X735

Φ12

15

50/55

R410A/1.45

0210W091BC

30

8

20

Φ6

GWH18MC-D3DNA1A/O

30

5

Specifications

The above data is subject to change without notice. Please refer to the nameplate of the unit.

tinU roodnI fo ledoM

Fan Motor Speed (r/min) (SH/H/M/L)

)W( rotoM naF fo tuptuO

)W( retaeH fo rewoP tupnI

Fan Motor Capacitor (μ )F

Fan Motor RLA(A)

eceiP-epyT naF

Diameter-Length (mm)

rotaropavE

Pipe Diameter (mm)

)mm(paG niF-woR

Coil length (l) x height (H) x coil

width (L)

ledoM rotoM gniwS

)W( rotoM gniwS fo tuptuO

)A( esuF

Sound Pressure Level dB (A)

(SH/H/M/L)

Sound Power Level dB (A)

(SH/H/M/L)

)mm ( )D/H/W( noisnemiD

Dimension of Package (L/W/H)(

mm)

)gk( thgieW ssor

G/ thgieW teN

Indoor

unit

ssalC ygrenE

)h/l( emuloV gniyfidimuheD

)W/W( P.O.C / REE

)A( tnerruC detaR

Air Flow Volume (m

3

/h) (SH/H/M/L)

Power Input (W) Standard (Low~High)

)W( tupnI detaR

Total Capacity (W) Standard (Low~High)

Total Capacity (Btu/h) Standard (Low~High)

egatloV detaR

)zH(ycneuqerF

ledoM

noitcnuF

edoC tcudorP

HEATING

7618

（

1260~7618

）

26000

（

4300~26000

）

2750

（

400~2750

）

0572

5.21

25.3

1400/1150/1100/

850

1008X315X219

1073X395X313

16/21

2.5

PCB 3.15A Transformer 0.2A

48/44/40/35

58/54/50/45

Φ7

2-1.5

765X342.9X25.4

M

P35XX

GWH24MD-D3DNA3A/I

1400/1150/1100/

900

35

/

2.5

0.45

Cross flow fan – 1

Φ98X765

Aluminum fin-copper tube

0.81=REES

HSPF=10.2

(Region IV)

HSPF=8.8

(Region V)

5.2

77.2

21

950/800/700/600

1790

（

500~2650

）

0562

6300

（

2812~7325

）

21500

（

9600~25000

）

~V032-802

zH06

A3AND3D-DM42HWG

GNILOOC

0600N171BC

6

The above data is subject to change without notice. Please refer to the nameplate of the unit.

Specifications

Liquid Pipe (mm)

Gas Pipe (mm)

Height (m)

Length (m)

Outdoor

unit

Connecti

on Pipe

Outer Diameter

Max Distance

Length (m)

Model of Outdoor Unit

Compressor

Manufacturer/trademark

Compressor Model

Compressor Type

Product Code

L.R.A. (A)

Compressor RLA(A)

Compressor Power Input(W)

Overload Protector

Throttling Method

Starting Method

Working Temp Range (

℃

)

Condenser

Pipe Diameter (mm)

Rows-Fin Gap(mm)

Coil length (l) x height (H) x coil

width (L)

Fan Motor Speed (rpm) (H/M/L)

Output of Fan Motor (W)

Fan Motor RLA(A)

Fan Motor Capacitor (μF

)

Air Flow Volume of Outdoor Unit

（

m

3

/h

）

Fan Type-Piece

Fan Diameter (mm)

Defrosting Method

Climate Type

Isolation

Moisture Protection

Permissible Excessive Operating

Pressure for the Discharge

Side(MPa)

Permissible Excessive Operating

Pressure for the Suction Side(MPa)

Sound Pressure Level dB (A)

Sound Power Level dB (A)

Dimension (W/H/D) ( mm)

Dimension of Package (L/W/H)(

mm)

Net Weight /Gross Weight (kg)

Refrigerant and Charge (kg)

Gas additional charge(g/m)

5

≤

T

≤

46 -15

≤

T

≤

GWH24MD-D3DNA1A/O

China Resources (Shenyang)

Sanyo C

O.,LTD

C-6RZ146H1A

Twin rotary compressor

41

8.4

1640

1NT11L-3979

Electric expand valve

Transducer starting

Aluminum fin-copper tube

7

2-1.4

967X748X38.1

780/500

90W

0.9

4

4200

Axial fan –1

Φ552

Auto defrost

T1

I

IP24

30

8

30

54/60

R410A/1.80

CB190W0140

Φ6

Φ16

15

920X790X370

1065X485X840

3.8

1.2

56

66

30

7

Cooling Heating

0 10 20 30 40 50 60 70 90 0 10 20 30 40 50 60 70 80 90 100 120110

80

11

10

9

8

7

6

5

4

3

2

1

0

Compressor speed (rps)

)A( tnerruC

11

10

9

8

7

6

5

4

3

2

1

0

Compressor speed (rps)

)A( tnerruC

• Conditions

Indoor : DB26.7˚C/WB19.4˚C

Outdoor : DB35˚C/WB23.9˚C

Indoor air flow : Turbo

Pipe length : 7.6m

• Conditions

Indoor : DB21.1˚C/WB15.6˚C

Outdoor : DB8.33˚C/WB6.11˚C

Indoor air flow : Turbo

Pipe length : 7.6m

220V

230V

240V

220V

230V

240V

0 10 20 30 40 50 60 70 90 0 10 20 30 40 50 60 70 80 90 100 120110

80

11

10

9

8

7

6

5

4

3

2

1

0

Compressor speed (rps)

)A( tnerruC

11

10

9

8

7

6

5

4

3

2

1

0

Compressor speed (rps)

)A( tnerruC

• Conditions

Indoor : DB26.7˚C/WB19.4˚C

Outdoor : DB35˚C/WB23.9˚C

Indoor air flow : Turbo

Pipe length : 7.6m

• Conditions

Indoor : DB21.1˚C/WB15.6˚C

Outdoor : DB8˚C/WB6.11˚C

Indoor air flow : Turbo

Pipe length : 7.6m

220V

230V

240V

220V

230V

240V

Cooling Heating

2.2 Operation Characteristic Curve

Specifications

GWC18MC-D3DNA3A GWH18MC-D3DNA3A

GWC24MD-D3DNA3A GWH24MD-D3DNA3A

8

Specifications

2.3 Capacity Variation Ratio According to Temperature

Cooling Heating

32 33 34 35 36 37 38 39 43 –15 –10 –5 0 5 7 10

40 41 42

100

105

95

90

85

80

75

70

65

60

55

50

Outdoor temp. (˚C)

)%( oitar yticapaC

110

100

90

80

70

60

50

40

Outdoor temp. (˚C)

)%( oitar yticapaC

• Conditions

Indoor : DB21.1˚C/WB15.6˚C

Indoor air flow : Turbo

Pipe length : 7.6m

• Conditions

Indoor : DB26.7˚C/WB19.4˚C

Indoor air flow : Turbo

Pipe length : 7.6m

2.4 Operation Date

NOTES :

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

bent. (Thermistor themometer)

(2) Connecting piping condition : 7.6 m

Cooling

Heatin

g

Standard

pressure

Indo

or Outdoor

P (MPa)

T1 (°C) T2 (°C)

18K 0.9 to 1.1 12 to 14 41 to 43 High High 62

24

K 0.8 to 1.0 10 to 12 43 to 45 High High 78

Ou

tdoor fan

mode

Compresso

r revolution

(rps)

26.7/19.4 35/–

Temperature condition

(°C)

Model

name

Heat exchanger pipe

temp.

Indo

or fan

mode

Standard

pressure

Indoo

r Outdoor

P (MPa)

T1 (°C) T2 (°C)

18K 2.2 to 2.4 37 to 38 2 to 4 High High 62

24

K 2.5 to 2.7 42 to 44 0 to 3 High High 80

Ou

tdoor fan

mode

Compresso

r revolution

(rps)

21.1

/

–

8/6.11

Temperature condition

(°C)

Model

name

Heat exchanger pipe

temp.

In

door fan

mode

P: The low side pressure measured from gas valve

T1:The coil temperature of indoor unit

T2:The coil temperature of outdoor unit

P: The high side pressure measured from gas valve

T1:The coil temperature of indoor unit

T2:The coil temperature of outdoor unit

9

2.5 Noise criteria curve tables for both models

50

40

30

Indoor side noise when blowing Outdoor side noise

Indoor fan motor rotating speed Compressor frequency/Hz

Specifications

Low Middle High Super High

10

3. Construction Views

3.1 Indoor Unit

Constrction views

Tube exit

Air inlet

Right

Left

Ceiling

W

D

H

MOD EL W(

΀

)H(

΀

)D(

΀

)

18K 940 298 200

24K 1008 315 219

18K 24K

11

3.2 Outdoor Unit

18K

Constrction views

>60

c

m

c0

6

>

m

c

0

6

>

m

c

0

2

>

Bolt

Nut

Wrenc

h

340

890

700

963

560

368

396

12

24K

>60

c

m

c

0

6

>

m

c

0

6

>

m

c

0

2

>

Bolt

Nut

Wrenc

h

370

920

1000

610

399

427

790

Constrction views

13

4. Refrigerant System Diagram

Cooling & Heating Models

Refrigerant System Diagram

2-Way

valve

Strainer

3-Way

valve

Muffler

4-Way valve

Expansion valve

Heat exchanger

( INDOOR )

Heat exchanger

( OUTDOOR )

rotalumucca-buS

rosserpmoC

Cooling

Heating

14

5. Schematic Diagram

5.1 Electrical wiring

Schematic Diagram

Models GWH18MC-D3DNA3A GWH24MD-D3DNA3A

These circuit diagrams are subject to change without notice, please refer to the one supplied with the unit.

15

5.2 Printed Circuit Board

TOP VIEW

BOTTOM VIEW

Schematic Diagram

16

TOP VIEW

BOTTOM VIEW

Schematic Diagram

23

6.3 DESCRIPTION OF EACH CONTROL OPERATION

Function and Control

1.Basic function of system

1 Cooling mode

1.Under this mode, fan motor, swing will work under setting status, the temp. range is 16-30 (61-86 Fahrenheit

scale

)

2.Outdoor

unit malfunction or unit stop running, indoor unit will keep original running status, malfunction displayed.

3.

When 0 (Tset-Tamb.), if indoor fan motor is high speed, that the fanmotorist running in middle s peed, the

middle speedor low speedwill be maintained;(this condition shouldbeexecutedwhencompressor sta rt up); the superhigh

speed

will not rotate; When (Tamb-Tset)

≥1

, the fan will return to the setting fan speed.

(2)Dehumidifying mode

1.Under t his mode, fan mo tor will run atlow speed,swing will work at setting status,settin g temp. range is16-30

(61-86

Fahrenheit scale)

2.Outdoor

unit malfunction or protection, unit will stop, indoor unit will keep original running status, malfunction

displayed.

(3)Fan mode

Under this mode, indoor fan motor could be setted at high , middle, low or auto speed, compresso, outdoor unit and

valve

will stop to run.

Under

this mode, temp. range should be 16-30 (61-86 Fahrenheit scale)

(4)Heating mode

1.Under this mode, temp. range should be 16-30 (61-86 Fahrenheit scale)

2.

Working condition and procedure of heating mode: When unit turn on and enter into Heating mode, indoor unit

enter into anti-cool wind

mode, when unit is stop running, and indoor fan motor turns on, blowing heat will act.

3.Protection

function, under heating mode, compressor will stop to run due to malfunction happened, indoor fan

motor will blow surplus heat.

4.Defrost

ing control: When receiving thedefrosting signal from outdoorunit, displayerwill display H1,10slater, indoor fan

motor will stop to run.

5.Anti-coold

wind function

6.Blow

heat air function

a.If

heating temp. meets the compressor stop running condition, compressors, outdoor fan motor will stop to run,

the

upper and lower guide louver will rotate to horizontal position L, indoor fan motor run at setting fan speed

for 60s, then the indoor fan motor will stop to run.

b.Due

to PG motor block running, the air guide board will keep the position when it stopping. (under each mode),

other

malfunction unit will stop to run, the upper and lower air guide louver will rotate to horizontal position

L, indoor fan unit will run at setting fan speed and run for 60s, indoor fan unit will stop to run.

(5)Auto mode:

1.When Tamb≥26 , select the cooling mode, at this time, the setting temp. is 25 (77 Fahrenheit scale)

2.Cooling

and heating units: Tamb ≤22 , will run at heating mode, at this time, the setting temp. is 20

(68Fahrenheit scale)

3.

Cooling only unit: When Tamb≤22 , it will run at Fan mode, the setting temp. is 25 (77 Fahrenheit scale)

4.When

23 ≤Tindoor amb. ≤ 25 ,firstly enter into auto mode and run at auto fan speed, other modes will

run

at auto mode, will keep the previous running mode. (When entering into Dehumidifying mode, it will run at

auto

fan speed)

24

2. Display state of indoor indicators

(1) State of indoor display board

1. When the unit is powered on, all patterns will be displayed and then only power indicator is on. When the unit is turned on

with a remote controller, the operating indicator is on and operation mode which is set currently is displayed.

2.

In defrosting mode, "H1" is displayed on "Double 8".

3.

Set temperature is displayed on "Double 8".

Display of operation patterns and mode patterns

When the unit is powered on, all patterns will be displayed and the standby operation indicator will become red. When the unit

is turned on through a remote controller, the operation indicator is light. At the same time, operating mode patterns (mode

indicators include cooling, heating and dehumidification modes) set currently are displayed, and dynamic display patterns of

wind speed are displayed. If the light button is switched off, all display will be turned off.

Temperature display control mode of separated air conditioner

①. When user sets the remote controller at set temperature display, currently set temperature will be displayed.

②. Only when remote signals are converted from other display states into indoor ambient temperature display state, the

remote controller will display indoor ambient temperature for 5 seconds and then return to set temperature display.

③. Only when remote signals are converted from other display states into outdoor ambient temperature display state, the

remote controller will display outdoor ambient temperature for 5 seconds and then return to set temperature display.

④. If the controller is lack of outdoor display functions, as the signal is received, set temperature will be displayed.

⑤. When the unit is turned off, temperature display will be compulsively set at given temperature by the controller. When the

unit

is turned on, patterns as set by remote signals will be displayed.

⑥. If user does not set up temperature display state, given temperature will be displayed.

(2) Failure display of indoor unit

1. Requirements for failure display

When multiple failures appear at the same time, failure protection codes shall be displayed alternatively.

① Hardware failures shall be displayed immediately, refe rring to requirements in "Failure State Display Table";

② Operation states shall be displayed immediately, referring to requirements in "Failure State Display Table";

③ Other failures shall be displayed 200s after the compressor stops, referring to requirements in "Failure State Display Table".

(Note: in the case that the unit is switched off with the remote controller, or the compressor is switched on again, failure

display waiting time (200s) shall be cleared.)

④ Frequency limitation and reduction states shall be displayed by means of remote calling.

2. Failure display control

Indicator failure display shall be kept synchronous with Double 8 failure display, that is, during indicator blinking, failure code

corresponding to such indicator shall be displayed on Double 8.

3. Method of remote calling of failure display

Enterin

g the failure remote calling mode: push the light button four times within 3s to call out relevant failure protection code;

Quit the failure remote calling mode: push the light button four times within 3s or call out failure display to enter it for 5 minutes

and

then quit.

3. Other control targets

(1)

Up and down wind blow functions: model of wind blow motor is MP28EA.

When the unit is powered on, the up and down wind blow motor will turn a wind deflector anti-clockwise to Position 0 to shut

down the air outlet. When the unit is switched on and wind blow function is not preset, under the heating mode, up and down

wind blades will turn clockwise to position D; and under other modes, the up and down wind blades will turn clockwise to

position L. If wind blow function is set at the same time as the unit is switched on, the wind blades will swing between position

L and D. The wind blades can be kept in seven states: position L, position A, position B, position C, position D, swing between

position L and D, stop at one position from L to D. When the unit is turned off, the wind deflector will be closed up to position 0.

Wind blow action is effective only when wind blow commands are set and the indoor unit is running.

Note: When the wind blades are set at position L to B, position A to C, or position B to D through

remote

setting, the wind deflector will swing between position L and D. L—A—B—C—D.

(2) Buzzer

When the controller is powered on, signals from a remote controller are received, or the auto button

is

pushed, a buzzer will give out prompt tone.

(3) Auto button

When the button is pushed, the unit will operate in auto mode and the indoor fan will run in auto state. When the indoor fan is

running, the wind blow motor will work. When the button is pushed again, the unit will be switched off. At the same time as the

button is pushed, the whole unit will be powered on and enter into fast test mode; when the unit is powered on and detects for

continuous 20s (such time shall not be fast tested) that the auto button is pushed, and if the unit is currently at fast test state,

the

unit will quit the fast test state.

Function and Control

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Fedders GWH18MC-D3DNA1A/O User manual

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