Heat Controller B-HMH24AS, B-HMC24AS, B-HMH18AS, B-HMC18AS, B-HMH12AS Service Manual

Wall Mounted

Mini-Split System

Air Conditioning/Heat Pump

Service Manual

B/A-HMC09AS
B/A-HMC12AS, B/A-HMH12AS
B/A-HMC18AS, B/A-HMH18AS
B/A-HMC24AS, B/A-HMH24AS

Before servicing the unit, read the

“safety precautions” in this manual.

Only for authorized service personnel.

®

Functions...................................................................................................................................... 3

Product Specifications................................................................................................................ 5

Dimensions................................................................................................................................... 7

Refrigeration Cycle Diagram..................................................................................................... 10

Wiring Diagram .......................................................................................................................... 12

Operation Details ....................................................................................................................... 15

Display Function........................................................................................................................ 22

Self-diagnosis Function ............................................................................................................ 22

Installation.................................................................................................................................. 23

Operation.................................................................................................................................... 38

Disassembly of the Parts(Indoor Unit)..................................................................................... 40

Cycle Troubleshooting Guide ................................................................................................... 46

Electronic Control Device ......................................................................................................... 56

Schematic Diagram.................................................................................................................... 59

Exploded View and Replacement Parts List............................................................................ 60

- 2 -

Contents

- 3 -

Functions

Indoor Unit

Operation ON/OFF by Remote controller

Sensing the Room Temperature

Room temperature control

Starting Current Control

Time Delay Safety Control

Indoor Fan Speed Control

Operation indication Lamps (LED)

Healthy Dehumidification Mode

Sleep Mode Auto Control

Auto Air Control by the unit electronic control

Chaos Swing

Defrost control(Heating)

Hot-start Control (Heating)

• Room temperature sensor (THERMISTOR)

• Maintains the room temperature in accordance with the Setting Temp.

• Indoor fan is delayed for 5 seconds at the starting.

• Restarting is inhibited for approx. 3 minutes.

• High, Med, Low and Auto

• Intermittent operation of fan at low speed

• Both the indoor and outdoor fan stops
during defrosting.

• Hot start will be operated after
defrosting ends.

• The indoor fan stops until the
indoor pipe temperature will be
reached at 28°C(82°F).

• The fan is switched to low(Cooling), med(Heating) speed.

• The unit will be stopped after 1, 2, 3, 4, 5, 6, 7 hours.

• The fan is switched to intermittent or irregular operation.

• The fan speed is automatically switched from high to low speed.

• The louver can be set at the desired position or swing up
and down automatically.

--- Lights up in operation

--- Lights up in Sleep Mode

--- Lights up in Timer Mode

--- Lights up in Defrost Mode or Hot Start Mode (only Heating Model)

--- Lights up during compressor running (only Cooling Model)

OUT

DOOR

- 4 -

Healthy Dehumidification Operation Mode.

( )

Remote Controller

Operation ON/OFF

Reset

Operation Mode Selection

Temperature Setting

Timer Selection

Timer Setting

JET COOL

Timer Cancel

Sleep Operation

Chaos Swing

(Cooling

model only)

(Heating

model only)

TEMPERATURE

LOW HIGH

Cooling Operation Mode.( )

Heating Operation Mode.( )

Auto Operation Mode.( )

Fan Operation Mode

Horizontal Airflow Direction Control Button(Option)

Room, Temperature Display

Setting the Time or Timer

Selecting °C / °F

ON OFF

SET

°C / °F

CANCEL

Fan Speed Selection

(Low) (Med) (High) (CHAOS)

: (High: 39°C(98°F) LOW : 12°C(54°F)

Down to 18°C(64°F)
Up to 30°C(86°F)

Cooling

: OFF, ON, OFF ON

: Cancel Sleep Mode, Timer ON or Timer OFF

: 1, 2, 3, 4, 5, 6, 7, Off Timer

: Fan Operates without cooling or heating.

Down to 16°C(60°F)
Up to 30°C(86°F)

Heating

- 5 -

Product Specifications(Cooling Only)

* Design and Specifications subject to change without prior notice for product improvement.

Items Unit

B/A-HMC09AS B/A-HMC12AS B/A-HMC18AS B/A-HMC24AS
Power Supply ø, V, Hz 1, 115V, 60 1, 115, 60 1, 230/208, 60 1, 230/208, 60
Cooling Capacity BTU/h 9,000 12,000 18,000/17,800 23,000/22,600
Input W 940 1,290 1,900/1,870 2,550/2,500
Running Current A 8.5 11.7 8.5/9.0 11.5/12.0
COMP. Locked Rotor AMP. A 46 58 47 67
E.E.R BTU/hW 9.6 9.3 9.5/9.5 9.0/9.0
Air Circulation m3/min(cfm) 7.1(250) 9.4(330) 13(460) 15(530)
Moisture Removal l/h(pts/hr) 1.2(2.6) 1.4(3) 2.5(5.3) 3.1(6.6)
Noise Level Indoor, High dB(A) 38 41 44 49
(Sound Med dB(A) 36 39 41 45

Pressure, 1m) Low dB(A) 35 37 38 40

Outdoor, Max dB(A) 48 48 55 57

Features Temperature Control Thermistor Thermistor Thermistor Thermistor

Air Deflection 4-way 4-way 4-way 4-way
Steps, Fan/Cool 3/3 3/3 3/3 3/3
Airflow Direction Control(up&down) Auto Auto Auto Auto
Airflow Direction Control(left&right) Manual Manual Manual Manual
Remocon Type Wireless LCD Wireless LCD Wireless LCD Wireless LCD
Setting Temperature Range, Cooling Mode 64~86°F 64~86°F 64~86°F 64~86°F
Temperature Increment 2°F2°F2°F2°F
Auto Operation(electronic control) Yes Yes Yes Yes
Self Diagnosis Yes Yes Yes Yes
Timer 24hr, On/Off 24hr, On/Off 24hr, On/Off 24hr, On/Off
Sleep Operation Yes Yes Yes Yes
Healthy Dehumidification Mode Yes Yes Yes Yes

Restart Delay minutes 3 3 3 3
Refrigerant(R-22) Charge g(oz) 630(22.2) 730(25.8) 1,250(44.1) 2,000(70.5)
Power cord AWG #: P*mm214:3*2.5 14:3*2.5 14:3*2.5 14:3*2.5
Fuse or breaker Capacity A 15A 20A 20A 25A
Connecting Cable AWG #: P*mm216:4*0.75 18:4*0.75 18:4*0.75 18:4*0.75
Connecting Tube Liquid Side mm(in) 6.35(1/4) 6.35(1/4) 6.35(1/4) 9.52(3/8)
(ø. Socket Flare) Gas Side mm(in) 12.7(1/2) 12.7(1/2) 15.88(5/8) 15.88(5/8)

Length, std m(ft) 7.62(25) 7.62(25) 7.62(25) 7.62(25)
Additional Drain Hose(Outer Dia.) mm(in) 15.5(5/8) 15.5(5/8) 15.5(5/8) 15.5(5/8)
Dimensions Indoor mm 802*262*165 888*287*170 1,080*314*181 1,080*314*181
(WxHxD) in 31.6*10.3*6.5 35.0*11.3*6.7 42.5*12.4*7.1 42.5*12.4*7.1

Outdoor mm 770*540*245 770*540*245 870*655*320 870*655*320

in 30.3*21.3*9.6 30.3*21.3*9.6 34.3*25.8*12.6 34.3*25.8*12.6

Net Weight Indoor kg(lbs) 7(15.4) 9.5(20.9) 13(28.7) 13(28.7)

Outdoor kg(lbs) 32(70.5) 32(70.5) 61(134.5) 62(136.7)

- 6 -

Product Specifications(Cooling & Heating)

Items Unit B/A-HMH12AS B/A-HMH18AS B/A-HMH24AS
Power Supply ø, V, Hz 1, 115, 60 1, 230/208, 60 1, 230/208, 60
Cooling Capacity BTU/h 12,000 18,000/17,800 23,000/22,600
Heating Capacity BTU/h 12,000 19,000/18,700 23,000/22,600
Input Cooling W 1,290 1,900/1,870 2,550/2,500

Heating W 1,290 1,900/1,870 2,550/2,500

Running Current Cooling A 11.7 8.5/9.0 11.5/12.0

Heating A 11.7 8.5/9.0 11.5/12.0
COMP. Locked Cooling A 58 42 67
Rotor AMP. Heating A 58 42 67
E.E.R BTU/hW 9.3 9.5/9.5 9.0/9.0
C.O.P 2.75 2.9/2.9 2.6/2.6
Air Circulation m3/min(cfm) 9.4(330) 13(460) 15(530)
Moisture Removal l/h(pts/hr) 1.4(3) 2.5(5) 3.1(6.6)
Noise Level Indoor, High dB(A) 41 44 47
(Sound Med dB(A) 39 41 44

Pressure, 1m) Low dB(A) 37 38 40

Outdoor, Max dB(A) 48 55 58
Features Temperature Control Thermistor Thermistor Thermistor

Air Deflection 4-way 4-way 4-way

Steps, Fan/Cool/Heat 3/3/3 3/3/3 3/3/3

Airflow Direction Control(up&down) Auto Auto Auto

Airflow Direction Control(left&right) Manual Manual Manual

Remocon Type Wireless LCD Wireless LCD Wireless LCD

Setting Temperature Range, Cooling Mode

64~86°F 64~86°F 64~86°F
Heating Mode 60~86°F 60~86°F 60~86°F
Temperature Increment 2°F2°F2°F
Auto Operation(electronic control) Yes Yes Yes
Self Diagnosis Yes Yes Yes
Timer 24hr, On/Off 24hr, On/Off 24hr, On/Off
Sleep Operation Yes Yes Yes
Healthy Dehumidification Mode Yes Yes Yes
Restart Delay minutes 3 3 3
Defrost Control Yes Yes Yes
Hot Start Yes Yes Yes

Refrigerant(R-22) Charge g(oz) 840(29.6) 1350(47.6) 1900(67.0)
Power cord AWG #: P*mm

2

14:3*2.5 14:3*2.5 14:3*2.5

Fuse or breaker Capacity A 20A 20A 25A
Connecting Cable AWG #: P*mm

2

18:4*0.75 18:4*0.75 18:4*0.75
Connecting Tube Liquid Side mm(in) 6.35(1/4) 6.35(1/4) 9.52(3/8)
(ø. Socket Flare) Gas Side mm(in) 12.7(1/2) 15.88(5/8) 15.88(5/8)

Length, std m(ft) 7.62(25) 7.62(25) 7.62(25)
Additional Drain Hose(Outer Dia.) mm(in) 15.5(5/8) 15.5(5/8) 15.5(5/8)
Dimensions Indoor mm 888*287*170 1080*314*181 108*314*181
(WxHxD) in 35.0*11.3*6.7 42.5*12.4*7.1 42.5*12.4*7.1

Outdoor mm 770*540*245 870*655*320 870*655*320

in 30.3*21.3*9.6 34.3*25.8*12.6 34.3*25.8*12.6

Net Weight Indoor kg(lbs) 9.5(20.9) 13(28.7) 13(28.7)

Outdoor kg(lbs) 33(72.8) 62(136.7) 63(138.9)

* Design and Specifications subject to change without prior notice for product improvement.

(1) Indoor Unit

- 7 -

Dimensions

D

W

H

Tubing hole cover

Tubing hole cover

Installation plate

MODEL

9K 12K 18K, 24K

DIM

W mm(inch) 802(31.6") 888(35.0") 1,080(42.5")

H mm(inch) 262(10.3") 287(11.3") 314(12.4")
D mm(inch) 165(6.5") 170(6.7") 181(7.1")

- 8 -

(2) Outdoor Unit

1. 9K, 12K

W

L2

L3

L1

D

H

L4

L5

Gas side

(3-way valve)

Liquid side

(2-way valve)

MODEL

9K, 12K

DIM unit

W mm(inch) 770(30.3)

H mm(inch) 540(21.3)

D mm(inch) 245(9.6)
L1 mm(inch) 287(11.3)
L2 mm(inch) 64(2.5)
L3 mm(inch) 518(20.4)
L4 mm(inch) 10(0.4)
L5 mm(inch) 100(3.9)

- 9 -

W

L6 L5 L7 L8

D

L1

L2

L9L10

L3L4

H

Gas side
3-way valve

Liquid side
3-way valve

2. 18K, 24K

MODEL

18K, 24K

DIM

W mm(inch) 870(34.3)

H mm(inch) 655(25.8)

D mm(inch) 320(12.6)
L1 mm(inch) 370(14.6)
L2 mm(inch) 25(1.0)
L3 mm(inch) 630(24.8)
L4 mm(inch) 25(1.0)
L5 mm(inch) 546(21.5)
L6 mm(inch) 162(6.4)
L7 mm(inch) 162(6.4)
L8 mm(inch) 54(2.1)
L9 mm(inch) 74.5(2.9)

L10 mm(inch) 79(3.1)

- 10 -

INDOOR UNIT

HEAT
EXCHANGER
(EVAPORATOR)

HEAT
EXCHANGER
(CONDENSER)

COMPRESSOR

GAS SIDE

CAPILLARY TUBE

LIQUID SIDE

OUTDOOR UNIT

• Cooling Only Models

MODEL

9K, 12K

(Cooling Only)

18K

(Cooling Only)

24K

(Cooling Only)

Pipe size(Diameter:ø) Piping length Elevation

Gas Liquid Rated Max Rated Max

1/2" 1/4" 7.62m(25ft) 15m(50ft) 5m(16ft) 8m(26ft)

5/8" 1/4" 7.62m(25ft) 15m(50ft) 5m(16ft) 8m(26ft)

5/8" 3/8" 7.62m(25ft) 15m(50ft) 5m(16ft) 8m(26ft)

Refrigeration Cycle Diagram

For installation over rated, *a proper quantity of refrigerant should be added for each 3.3ft(1m).

Ex) 18K: When installed at a distance of 50ft(15m),

10.6Oz(295g) of refrigerant should be added.
(50-25) 1.4 3.3 = 10.6 Oz (295g) of refrigerant
to add

Unit precharged for 25ft. line sets.

a proper quantity of refrigerant

9k, 12k 0.7 Oz (20g)

18k, 24k 1.4 Oz (40g)

- 11 -

INDOOR UNIT

HEAT
EXCHANGER
(EVAPORATOR)

HEAT
EXCHANGER
(CONDENSER)

REVERSING
VALVE

COMPRESSOR

COOLING
HEATING

GAS SIDE

CAPILLARY TUBE

CHECK VALVE

LIQUID SIDE

OUTDOOR UNIT

• Cooling & Heating Models

MODEL

9K, 12K

(Cooling & Heating)

18K

(Cooling & Heating)

24K

(Cooling & Heating)

Pipe size(Diameter:ø) Piping length Elevation

Gas Liquid Rated Max Rated Max

1/2" 1/4" 7.62m(25ft) 15m(50ft) 5m(16ft) 8m(26ft)

5/8" 1/4" 7.62m(25ft) 15m(50ft) 5m(16ft) 8m(26ft)

5/8" 3/8" 7.62m(25ft) 15m(50ft) 5m(16ft) 8m(26ft)

For installation over rated, *a proper quantity of refrigerant should be added for each 3.3ft (1m).

Ex) 18K: When installed at a distance of 50ft(15m),

10.6Oz(295g) of refrigerant should be added.
(50-25) 1.4 3.3 = 10.6 Oz (295g) of refrigerant
to add

Unit precharged for 25ft. line sets.

a proper quantity of refrigerant

9k, 12k 0.7 Oz (20g)

18k, 24k 1.4 Oz (40g)

- 12 -

Wiring Diagram

(1) Indoor Unit

1. 9K, 12K, 18K, 24K(Cooling Only Models, Cooling & Heating Models)

4
3
2
1

BLDC
MOTOR

STEP
MOTOR

MAIN P.C.B

INDOOR WIRING DIAGRAM

TO OUTDOOR UNIT

DISPLAY P.C.B

(R

O

O

M

)

(PIPE)

TH

E

R

M

ISTO

R

C

N

-U

P

/D

O

W

N

3854AR7074A

C

N

-M

O

TO

R

PILLAR

TER

M

IN

AL

C

N

-D

C

/D

C

C

N

-D

ISP

C

N

-TH

BL
BK
BR
RD

- 13 -

(2) Outdoor Unit

• Cooling Only Models

1. 9K, 12K

3. 24K

2. 18K

BL
BL

BK
BK

FUSE

3.15A

FUSE

2.5A

ZNR

CN-DC/DC

RY-COMP

34

MAIN P.C.B

YL

MOTOR

RD

BL

BR

BL

RD

BR

BL

TERMINAL
BLOCK

TO INDOOR UNIT

POWER

INPUT

3854A30077ZOUTDOOR WIRING DIAGRAM

RD

BR BK BL

G

H

F

C

CAPACITOR

CN-TRANS

TRANSFORMER

T/B 1

CN-POWER

BR

BR YL

O.L.P

COMP.

S

RC

(N)(L)

OR(BR)

YL

C

H

CAPACITOR

YLBR

S

C

R

COMP.

MOTOR

F

O.L.P

BR

MAIN P.C.B

BL

T/B 1

BK

BR

BR

BL

1

0

BR

8
6

BL

4
2

BL

RD

RY-COMP

34

ZNR

CN-POWER

BR

BL

TERMINAL
BLOCK

FUSE

3.15A

CN-DC/DC

RD BR BK BL

2.5A

FUSE

TO INDOOR UNIT

3854AR7077JOUTDOOR WIRING DIAGRAM

BL

BK

CN-TRANS

BK

POWER

TRANSFORMER

G

INPUT

MAIN P.C.B

OR(BR)

YL

MOTOR

F

C

H

CAPACITOR

YLBR

S

C

R

COMP.

BL

T/B 1

BK

BR

BR

1

0

BR

8
6

BL

4
2

BL

RD

RY-COMP

34

ZNR

CN-POWER

BR

BL

TERMINAL
BLOCK

FUSE

3.15A

CN-DC/DC

RD BR BK BL

2.5A

FUSE

TO INDOOR UNIT

3854AR7077LOUTDOOR WIRING DIAGRAM

BL
BL

BK

CN-TRANS

BK

POWER

TRANSFORMER

G

INPUT

- 14 -

• Cooling & Heating Models

1. 9K, 12K

2. 18K, 24K

4WAY-

VALVE

BK

RD

RY-4WAY

BL

BL
BK
BK

FUSE

3.15A

RY-FAN

RY-HEATER

ZNR

CN-DC/DC

RY-COMP

34

MAIN P.C.B

BK

YL

MOTOR

RD

BL

RD

BR

BL

RDBR

O.L.P

BL

TERMINAL
BLOCK

TO INDOOR UNIT

POWER

INPUT

3854A30077WOUTDOOR WIRING DIAGRAM

RD BR BK BL

WHWH

G

WH

WH

H

F

C

CAPACITOR

COMP.

R

C

YLBR

S

CRANK
CASE
HEATER

CN

-

4WAY

CN-TRANS

TRANSFORMER

CN

-

FAN

T/B 3

T/B 1

T/B 2

T/B 4

CN-POWER

FUSE

2.5A

(N)(L)

BK

4WAY­VALVE

OR(BR)

YL

C

H

CAPACITOR

YLBR

S

C

R

COMP.

MOTOR

F

BK

BK

T/B 3

BL

CRANK CASE
HEATER

1

0

T/B 1
T/B 2

WH

MAIN P.C.B

RY-4WAY

RD

4WAY

­CN

RD

RY-FAN

BK

WHWH
WH

T/B 4

BR

8

BR

6

BL

4
2

BL

RY-HEATER
FAN

­CN

RY-COMP

34

BR

TERMINAL
BLOCK

ZNR

FUSE

3.15A

CN-POWER

BL

2.5A

FUSE

CN-DC/DC

RD BR BK BL

BL
BL

BK

CN-TRANS

BK

TRANSFORMER

G

RD

TO INDOOR UNIT

3854AR7077MOUTDOOR WIRING DIAGRAM

POWER

INPUT

(1) The function of main control

1. Time delay Safety Control

• 3min.; The compressor operation is delayed for 3 minutes to balance the pressure of cycle.
(Protection of compressor)

• 5sec.;

The indoor fan is delayed for 5 seconds, when operating initially, to prevent noises occurred by the vertical
louver and wind.

• 2min.; The reversing valve is delayed for 2 minutes to prevent the refrigerant-gas for abnormal noise when the
heating operation is OFF or switched to the other operation mode while compressor is off.
While compressor is running, it takes 3~5 seconds to switch.

2. Chaos Swing Mode

• By the Chaos Swing key input, the upper/lower vane automatically operates with the Chaos Swing or they are

fixed to the desired direction.

• While in Chaos Swing mode, the angles of cooling and heating cycle operations are different.

- 15 -

Operation Details

INTAKE AIR TEMP.

SETTING TEMP. +1°F
(Compressor ON)

SETTING TEMP. -1°F
(Compressor OFF)

Setting
fan speed

Setting
fan speed

More than
3 minutes

More than
3 minutes

Setting
fan speed

COMPRESSOR ON OFF ON OFF ON

INDOOR FAN SPEED Low Low

■ Protection of the indoor heat exchanger from frosting

• Compressor and outdoor fan stop when indoor pipe temperature is below 0°C(32°F) and restart at the pipe
temperature is above 7°C(45°F).

3. Cooling Operation Mode

• When selecting the Cooling( ) Mode Operation, the unit will operate according to the setting by the
remote control and the operation diagram is shown below.

CLOSED

OPEN

< Cooling Mode >

8°

CLOSED

OPEN

< Heating Mode >

8°

4. Auto Operation (Electronic control mode)

• The operation procedure is shown below. (Cooling & Heating Model)

❋ If initial mode is decided, that mode is continued without the room temperature changing.

■ Auto Operation for Cooling

- 16 -

Press Start/Stop Button

Select Auto Operation Mode

Check the Room temperature

Operation mode
Indoor fan speed are decided automatically by the unit electronic control.
Setting temperature

Intake-air

temperature

Operation Mode

Over below
70°F76

°

F

Soft Dry

below 70°F

Heating

Over 76°F

Cooling

~

INTAKE AIR TEMP.

SETTING TEMP. +1°F
(Compressor OFF)

SETTING TEMP. -1°F
(Compressor ON)

COMPRESSOR ON OFF ON OFF

INDOOR FAN SPEED The electronic control operation

Intake-air Temperature Setting Temperature

Over 78°F77°F
Over 76°F~below 78°F Intake air -1°C
Over 72°F~below 76°F Intake air -0.5°C
Over 68°F~below 72°F Intake air temperature

below 64°F64°F

Over 64°F~below 86°F Electronic control

below 64°F64°F

over 86°F86°F

Operation Condition

When Auto Operation
initial start

Controlled by
the electronic
control

In this mode,
when pressing
the vertical air
direction control
button, vertical
louver swings up
and down
automatically.

Fan Speed Air Direction Control

When pressing room
temperature setting
button during Auto
Operation

■ Auto Operation for Dehumidification(only Heating Model)

• The Setting temperature will be same that of the auto operation for cooling.

- Compressor ON temperature; Setting temperature +2°F

- Compressor OFF temperature; Setting temperture -1°F

■ Auto Operation for Heating(only Heating Model)

- Compressor ON temperature; Setting temperature

- Compressor OFF temperature; Setting temperature +6°F

- 17 -

Intake-air temp. below 68°F Over 68°F~below 70°F over 86°F

Setting temp. 68°F Intake air temperature +1°F86°F

■ Vertical louver auto operation

: During Auto Operation, pressing the chaos swing button makes the horizon­tal louvers swing up and down automatically.
If you want to stop auto-swing, press chaos swing button again.

5. Healthy Dehumidification

• When the dehumidification operation input by the remote control is received, the intake air temperature is
detected and the setting temp is automatically set according to the intake air temperature.

26°C ≤ Intake Air Temp ➲ 25°C
24°C ≤ Intake Intake Air Temp<26°C ➲ Intake Air Temp-1°C
18°C ≤ Intake Intake Air Temp<24°C ➲ Intake Air Temp-0.5°C
Intake Air Temp<18°C ➲ 18°C

• While in compressor off, the indoor fan repeats low airflow speed and pause.

• While the intake air temp is between compressor on temp. and compressor off temp., 10-min dehumidification

operation and 4-min compressor off repeat.
Compressor ON Temp. ➲ Setting Temp+0.5°C
Compressor OFF Temp. ➲ Setting Temp-0.5°C

• In 10-min dehumidification operation, the indoor fan operates with the low airflow speed.

- 18 -

- 19 -

6. Heating Operation Mode(only Heating Model)

The unit will operate according to the setting conditions by the remote controller.
The operation diagram is shown below.

INTAKE AIR TEMP.

SETTING TEMP. +6

°

F

(Compressor OFF)

SETTING TEMP.
(Compressor ON)

Selecting
fan speed

Selecting
fan speed

A

B

A

minimum

10sec.

minimum

1 min.

minimum

10sec.

COMPRESSOR ON OFF ON OFF

• A point; While the indoor pipe temperature is higher than 95°F, indoor fan operates at low speed. When the
indoor pipe temperature becomes lower than 95°F, indoor fan stops.

• B point; When the indoor pipe temperature is higher than 38°C(100°F), fan operates at selected fan speed.

INDOOR FAN SPEED

Low

OFF

Low Low OFF

OFF OFFLOW

ON

Selecting
fan speed

INDOOR PIPE

TEMP.

82°F

78°F

1min

INDOOR FAN SPEED

COMPRESSOR

■ Hot-Start Control

• The indoor fan stops until the indoor pipe temperature will be reached at 82°F.

• During heating operation, if indoor pipe temperature falls below 78°F fan stops.

• The operation diagram is shown below.

7. Cooling or Heating Mode with Sleep Mode Auto Control

• When selecting the Cooling( ) or the Heating( ) combined with the Sleep Mode Auto Control( ), the
operation diagram is as following.

■ Cooling Mode with the Sleep Mode

• The setting temperature will be automatically raised by 2°F 30 minutes later and by 4

°

F 1 hour later.

• The operation will be stopped after 1, 2, 3, 4, 5, 6, 7 hours.

■ Heating Mode with the Sleep Mode(only Heating Model)

• The operation will be stopped after 1, 2, 3, 4, 5, 6, 7 hours.

- 20 -

INTAKE AIR TEMP.

SETTING TEMP. +1°F
(Compressor ON)

SETTING TEMP. -1°F
(Compressor OFF)

30 minutes

30 minutes

More than

3 minutes

2°F

2°F

More than

3 minutes

COMPRESSOR ON OFF ON OFF ON

INDOOR FAN SPEED Low Low Low Low Low

SETTING TEMP. +6

°

F

(Compressor OFF)

SETTING TEMP.
(Compressor ON)

COMPRESSOR ON OFF ON OFF ON OFF

INDOOR FAN SPEED Med Low or OFF Med Low or OFF Med Low or OFF

INTAKE AIR TEMP.

More than

3 minutes

More than

3 minutes

More than
3 minutes

- 21 -

8. Forced Operation

Operation procedures when the remote control can't be
used.
Open the front panel upward and move the Slide Switch
to the Forced Operation position.
If you want to stop operation, move the Slide Switch to
the Auto Restart or the Remote Control position.
In case the power comes on again after power failure on
the Forced Operation position, the operating conditions
are automatically set as follows:
During Forced Operation, the initial mode continues.

9. AUTO RESTART

In case the power comes on again after a power failure,
Auto Restarting Operation is the function to operate pro­cedures automatically to the previous operating condi­tions.
If you want to use this operation, Open the front panel
upward and move the slide switch to the Auto Restart
position.
If you do not want to use this operation, move the Slide
Switch to the Remote Control position.

When you are out for a while, put the Slide Switch

on the Remote Control.

Cooling Heat pump Model

Model

Room Temp. ≥ 24°C(76°F)

21°C(70°F) ≤ Room Temp. < 24°C(76°F)

Room Temp. < 21°C(70°F)

Operating mode Cooling Cooling Healthy Dehumidification Heating

Indoor FAN Speed

High High

Healthy Dehumidification Rule

High

Setting Temperature

22°C(72°F) 22°C(72°F) 23°C(74°F) 24°C(76°F)

Open the front
panel upward

Slide
Switch

Slide Switch

FORCED
OPERATION

AUTO
RESTART

REMOTE
CONTROL

Slide
Switch

Open the front
panel upward

Slide Switch

FORCED
OPERATION

AUTO
RESTART

REMOTE
CONTROL

• Cooling, Soft Dry, Fan, Heating

• Sleep Mode

• Timer Mode

• Hot-start, Defrost

• Compressor ON

• BUZZER SOUND

• Power Input or Reset : One short beep.

• When Operation Stop Button is pressed : One long beep.

• When Remote Controller Buttons except for Operation Stop are pressed : Two short beep.

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Display Function

Self-diagnosis Function

Operation Indicator

Sleep timer Indicator

Timer Indicator

Defrost Indicator or
Hot start Indicator

OUT

DOOR

: Cooling & Heating Model only

: only Cooling Model

CODE NO. DIAGNOSIS Operation Indicator LED Blinks Unit Operation

① Once Still Operation
② Outdoor pipe thermistor Short/Open Twice Outdoor Unit Off

③ 5 times Stop

Indoor room temperature thermistor or
pipe temperature thermistor Short/Open

Communication failure between indoor and
outdoor

• LED blinks as many times as code No. (0.5 second ON/0.5 second OFF) with 3 seconds interval.

• While the unit is off, no indication displays.

• If more than one code occurs simultaneously, bigger code No. is displayed.