Room Air Conditioner

(Convertible Type)

SERVICE MANUAL

MODEL: CV-H186BLB0

CV-H246BLB0

(Applied to new Refrigerant R-407C)

Contents

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

Product Specifications (Cooling & Heating).........................................................................5

Dimensions ..............................................................................................................................6

Refrigeration Cycle Diagram ..................................................................................................8

Wiring Diagram........................................................................................................................9

Operation Details ..................................................................................................................10

Display Function ...................................................................................................................18

Self-diagnosis Function........................................................................................................18

Installation .............................................................................................................................19

Operation ...............................................................................................................................36

Disassembly of the parts (Indoor Unit) ...............................................................................38

Cycle.......................................................................................................................................42

Cycle Troubleshooting Guide...............................................................................................45

Electronic Parts Troubleshooting Guide.............................................................................46

Electronic control device......................................................................................................50

Schematic Diagram ...............................................................................................................51

Exploded View and Replacement Parts List.......................................................................52

–2–

Functions

Indoor Unit

Operation ON/OFF by Remote controller

Sensing the Room Temperature

• Room temperature sensor. (Thermistor)

Room temperature control

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

Starting Current Control

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

Time Delay Safety Control

• Restarting is inhibited for approx. 3 minutes.

Indoor Fan Speed Control

• High, Med, Low, Chaos

Operation indication Lamps (LED)

--- Lights up in operation

--- Lights up in Sleep Mode

--- Lights up in Timer Mode

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

--- Lights up during compressor running

(only Cooling Model)

Soft Dry Operation Mode

• Intermittent operation of fan at low speed.

Sleep Mode Auto Control

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

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

Natural Air Control by CHAOS Logic

• The fan is switched to intermittent or irregular operation

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

Airflow Direction Control

• The louver can be set at the desired position or swing up and down, right and left (not on all models) automatically.

Auto Operation

• The setting temperature, indoor fan speed and desired operation made are automatically set by fuzzy rule.

–3–

Deice (defrost) control (Heating)

• Both the indoor and outdoor fan stops during deicing.

• Hot start after deice ends.

Hot-start Control (Heating)

• The indoor fan stops until the evaporator piping temperature will be reached at 28°C.

Remote Controller

Operation ON/OFF

Operation Mode Selection

(Cooling model only)

(Heating model only)

Fan Speed Selection

Cooling Operation Mode.( )

Soft Dry Operation Mode.( )

(Low) (Med)

Auto Operation Mode.( )

Heating Operation Mode.( )

(High) (CHAOS)

Room Temperature Display

: High:39°C °Í LOW:11°C

Temperature Setting

TEMPERATURE

LOW HIGH

Cooling

Down to 18°C

Up to 30°C

Heating

Down to 16°C

Up to 30°C

Setting the Time or Timer

Timer Selection

ON OFF

: OFF, ON, OFF °Í ON

Timer Setting

SET

Timer Cancel

CANCEL

: Cancel Sleep Mode, Timer ON or Timer OFF.

Sleep Operation

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

Airflow Direction Control

Fan Operation Mode

Reset

: Fan Operates without cooling.

–4–

Product Specifications

Model Name

Item Unit

Cooling Capacity

Heating Capacity

Moisture Removal

Power Source

Btu/h(kcal/h)

Btu/h(kcal/h)

/h

ø, V, Hz

Air Circulation

Input

Running Current

Indoor

Outdoor

Cooling

Heating

Cooling

Heating m

3

/min

W

A

E.E.R.(Cooling)

C.O.P.(Heating)

Dimensions

(W x H x D)

Net. Weight

Service Valve &

Connecting Tube

Indoor

Outdoor

Indoor

Outdoor

Btu/h-W w/w mm kg

Refrigerant (R-410A)

Airflow Direction Control (Up & Down) g

Remocon Type

Liquid

Gas

Sleeping Operation

Drain Hose

Connecting Wire

Main Power Cable

Time Delay Safety Function

Air Circulation

Soft Dry

Fan Speed (Indoor)

Timer

Self-Diagnosis

Auto-Restart

CV-H186BLB0 CV-H246BLB0

19,000(4,788)

19,000(4,788)

2.5

3ø, 220-240V~, 50Hz

23,300(6,048)

23,300(6,048)

3.5

13.5

45

2,050

2,000

9.0

8.8

9.27

2.78

15

50

2,600

2,550

11.8

11.6

8.96

2.76

1,200 x 205 615

870 x 655 320

30

59

1,500 1,650

O

L.C.D Wiress

1/4"(6.35)

1/2"(12.7) 5/8"(15.88)

O

O

0.75mm

2

2.0mm

2

2.5mm

2

O

O

O

3 (Hi, Med, Low)

24Hrs

O

O

–5–

Dimensions

(1) Indoor Unit

1200mm

615mm

R

205mm

63mm

38mm

265mm

392mm

468mm

(Installation Plate)

175mm

36mm

–6–

1076mm

(Rear Side)

250mm

36mm

(2) Outdoor Unit

W

L7

MODEL

DIM

L6

L7

L8

L9

L10

L11

L2

L3

L4

L5

W

H

D

L1 mm mm mm mm mm mm mm mm mm mm mm mm mm mm

L6 L8 L9

–7–

CV-H186BLB0

CV-H246BLB0

546

162

162

54

74.5

79

25

340

630

25

870

655

320

370

Gas side

3-way valve

Liquid side

3-way valve

Refrigeration Cycle Diagram

• CV-H186BLB0

• CV-H246BLB0

INDOOR UNIT

LIQUID SIDE

OUTDOOR UNIT

CAPILLARY TUBE

HEAT

EXCHANGER

HEAT

EXCHANGER

GAS SIDE

COMPRESSOR

REVERSING

VALVE

COOLING

HEATING

MODEL

CV-H186BLB0

CV-H246BLB0

Pipe size(Diameter:ø)

Gas Liquid

1/2"

5/8"

1/4"

1/4"

Piping length(m)

Rated

7.5

7.5

Max

15

20

For installation over rated distance, 30g of refrigerant should be added for each meter.

ex) If 18K or 24K Model is installed at a distance of 15m, 300g of refrigerant should be added.

(15-7.5) x 30g = 225g

Elevation(m)

Rated Max

5

5

8

8

–8–

Wiring Diagram

(1) Indoor Unit

CV-H186BLB0, CV-H246BLB0

TRANS -

FORMER

CAPACITOR

BR YL

GN/YL

MOTOR

OR

RD

BL

BK

DOOR S/W 1,2

GN/YL

CN - TRANS

CN - FAN

RY-L

RY-M

RY-H

FUSE

T3.15A

RY-COMP

CN-4WAY

RY-4WAY

1(L) 2(N)

THERMISTOR

CN-TH

MAIN PCB

ASSY

STEP

MOTOR

STEP

MOTOR

3 4 5 6

RY-FAN

GN/YL

7 8

TERMINAL

BLOCK

CN-DISP

DISPLAY PCB

ASSY

POWER

INPUT

TO OUTDOOR UNIT

WIRING DIAGRAM

3854A20125G

(2) Outdoor Unit

CV-H186BLB0, CV-H246BLB0

OUTDOOR WIRING DIAGRAM

R

COMP

S

C

BL CAPACITOR

RD

BR

WH

REVERSING

VALVE

FAN

MOTOR

YL

OR

BK

CAPACITOR

OR

BK

TB1 pipe TH

L1

D.P

TNS

NO NC NO NC

L2

BK

L3

BL

TB2

L4

GN/YL

TERMINAL

BLOCK

3 4 5 6 7

TO INDOOR UNIT

RD

BK

OR

BK

WH

1

2

3

4

5

6

7

8

9

FUSE T3.15A

3854A20128P

–9–

Operation Details

(1) The function of main control

1. Time Delay Safety Control

• 3min… The compressor is ceased for 3minutes to balance the pressure in the refrigeration cycle.

(Protection of compressor)

• 5sec… Vertical air flow direction control louvers open in 5 seconds to prevent noise between louvers and wind.

• 30sec… The 4-way valve is ceased for 30sec. to prevent the refrigerant-gas abnormal noise when the Heating operation is OFF or switched to the other operation mode while compress is off.

While compressor is running, it takes 3~5 seconds to switch.

2. Airflow Direction Control

• This function is to swing the louver up and down automatically and to set it at the desired position.

• The procedure is as the following.

1st ; Press the ON/OFF Button to operate the product.

2nd ; Press the Airflow Direction Control Button to swing the louver up and down automatically.

3nd ; Repress the Airflow Direction Control Button to set the louver as the desired position.

MODE 0

MODE 1

MODE 2

MODE 3

MODE 4

MODE

5

MODE

6

MODE

7

135

°

Cooling

MODE 9

(CLOSE)

For Heating Model

• Airflow direction control figure when installed on the floor.

• Airflow direction control figure when installed under the ceiling.

OPEN

MODE 1

MODE 2

Cooling

MODE 3

MODE 4

MODE 5

MODE 6

MODE 7

MODE 8

MODE 9

CLOSE

12

°

135

°

OPEN

MODE 1

MODE 2

Cooling

MODE 3

MODE 4

MODE 5

MODE 6

MODE 7

MODE 8

MODE 9

CLOSE

12

°

135

°

–10–

3. Cooling Mode Operation

• When selecting the Cooling( ) Mode Operation, the unit will operate according to the setting by the remote controller and the operation diagram is as following

Intake Air temp.

COMP. ON

(SET TEMP.+0.5°C)

COMP. OFF

(SET TEMP. -0.5°C)

More than More than

Selecting fan speed

3 minutes 3 minutes

Selecting fan speed

COMPRESSOR ON OFF ON OFF

Selecting fan speed

ON

4. Cooling or Heating Mode with Sleep Mode Auto Operation

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

■

Cooling Mode with the Sleep Mode

• The setting temperature will be raised by 1°C 30minutes later and by 2°C 1 hour later.

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

Intake Air temp.

30 minutes 30 minutes

1°C

COMP. ON

(SET TEMP.+0.5°C)

1°C

COMP. OFF

(SET TEMP. -0.5°C)

INDOOR FAN

COMPRESSOR

Low

ON

More than

3 minutes

Low

OFF

More than

3 minutes

Low Low

ON OFF

Low

ON

■

Heating Mode with the Sleep Mode. (Heating model only)

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

Setting Temp. +3°C

(Compressor OFF)

Setting Temp.

(Compressor ON)

Indoor Fan

Compressor

Med.

ON

Med.

OFF

Med.

ON

–11–

Med.

OFF

Med.

ON

Med.

OFF

5. Auto Operation

• The operation procedure is as following. (Cooling & Heating Model)

Press Start/Stop Button

Select Auto Operation Mode

Check the Room temperature

Operation mode

Indoor fan speed

Setting temperature

Intake-air temperature

Operation Mode are automatically decided by Fuzzy rule.

below 21°C

Heating

Over

21°C

~

Soft Dry below

24°C

Over 24°C

Cooling

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

• For cooling operation mode over 24°C setting temperature and fan speed are same as cooling only model.

■

Auto Operation for Cooling.

Operation Condition Intake-air Temperature Setting temperature Fan speed Air Direction Control

When Auto Operation initial start

When pressing room temperature setting button during Auto Operation

Over 26°C

Over 24°C~below 26°C

25°C

Intake air -1°C

Over 22°C~below 24°C Intake air -0.5°C

Over 20°C~below 22°C intake air temperture below 20°C

Over 20°C~below 30°C

20°C

Fuzzy control

Controlled by Fuzzy logic below 20°C over 30°C

20°C

30°C

In this mode, when pressing the vertical air diretion control.

Button, louvers moves to 1/f rhythm (refer to page 17)

Intake-Air temp

Setting Temp. +0.5°C

(Compressor OFF)

Setting Temp.-0.5°C

(Compressor ON)

Indoor Fan

Compressor

ON OFF

–12–

Fuzzy Speed

ON OFF

■

Auto Operation for Soft Dry

The Setting temperature will be same as that of the current intake-air temperature.

- Compressor ON temperature; Setting temperature +1°C

- Compressor OFF temperature; Setting temperature -0.5°C

■

Auto Operation for Heating. (Heating model only)

Intake Air temp.

Setting temp.

20°C

- Compressor ON temperature; Setting temperature

- Compressor OFF temperature; Setting temperature +3°C

Setting temp.

21.5°C

Intake air temp. +0.5°C

20.5°C

20°C

20°C 21°C

Intake-Air temp.

• 1/f rhythm louver operation : In Auto operation mode, when pressing the vertical air direction control button, louver moves as following cycle.

MODE0

MODE1

MODE2

Start

MODE3

MODE4

MODE5

MODE6

End

MODE9

(CLOSED)

–13–

6. Natural wind by CHAOS logic

For more fresh feeling than other fan speed mode, press the indoor fan Speed Selector and set to CHAOS mode.

In this mode, the wind blows like natural breeze by automatically changing fan speed according to the CHAOS logic.

Intake Air temp.

Setting CHAOS Natural wind

Cooling on temp.

(Setting temp.+0.5)

Setting temp.

Cooling off temp.

(Setting temp.-0.5)

INDOOR FAN

OUTDOOR FAN/COMP.

: Setting fan speed : CHAOS Natural wind : LOW : COMP ON

GRAPH of Natural wind by the CHAOS logis (During Cooling operation)

: COMP OFF

Intake Air temp.

Setting CHAOS Natural wind

Heating off temp.

(Setting temp.+3.0)

Heating on temp.

(Setting temp.) 30sec

INDOOR FAN

LOW OR STOP

OUTDOOR FAN/COMP.

: Setting fan speed : CHAOS Natural wind : LOW : COMP ON

GRAPH of Natural wind by the CHAOS logis (During Heating operation)

: COMP OFF

–14–

7. Heating Mode Operation

The unit will operate according to the setting by the remote controller and the operation diagram is shown as following.

• For Heating Model

Indoor piping temp.

28

°

C

26

°

C

Intake Air temp.

Setting temp. +3.0˚C

(Compressor OFF)

Setting temp.

(Compressor ON)

COMPRESSOR

OUTDOOR FAN

INDOOR FAN

4-WAY VALVE

Fan

Stops minimum

1min.

ON

ON

Low

Fan

Selected

Fan minimum

3min.

OFF

OFF

Low Fan

ON

ON

Selected Fan minimum

30sec.

minimum

3min.

OFF

OFF

Low Fan

ON

8. Hot-Start Control

• The indoor fan stops until the evaporator piping temperature will be reached to 28°….

• During heating operation, if piping temperatures falls below 26°C fan stops.

• The operation diagram is as following.

Fan Stop minimum

1min.

ON

ON

Low

Fan

Selected

Fan

PIPING

TEMPERATURE

28

°

C

26

°

C

1min

INDOOR FAN

COMPRESSOR

: Selected Fan : Low Fan

ON

: Fan Stop

–15–

9. Deice Control

• Deicing operation is controlled by timer and sensing the outdoor piping temperature.

• The first deicing starts only when the outdoor pipe temperature falls below -6°C after 30 minutes passed from starting of heating operation.

• Deicing ends after 5 minutes passed from starting of deice operation or when the outdoor pipe temperature rises over 12°C even if before 6 minutes.

• The second deicing starts only when the outdoor pipe temperture falls below -6°C after 30 minutes passed from ending of the first deicing.

The outdoor piping Temp.

More than 30 minutes of heating operation

Within

6 minutes

Deicing

More than 30 minutes of heating operation

Deicing

12

°

C

DEICE OFF

-6

°

C

DEICE ON

HOT-

START

INDOOR FAN ON OFF ON OFF

COMPRESSOR

ON ON

ON

ON

4-WAY VALVE

ON OFF ON OFF

10. Soft Dry Operation

• During Soft Dry Operation, the compressor ON temperature is the setting temperature plus 1°C, the compressor

OFF temperature is the setting temperature minus 0.5°C.

• When the room temperature rises over the compressor ON temperature, the operation mode is switched to the cooling mode.

• When the room temperature falls between the compressor ON temperature and OFF temperature, the operation mode is switched to the Soft Dry Operation.

In this temperature range, 10min. Dry Operation, 7min operation OFF. During 10min Dry operation, if the room temperature falls below compressor OFF temperature, Compressor OFF.

• In micom dehumidify mode, control of fan speed is as following.

Intake Air temp.

Setting temp. +1.0˚C

(Compressor ON)

Setting temp.

Setting temp. -0.5˚C

(Compressor OFF)

COMPRESSOR

OUTDOOR FAN

INDOOR FAN

Cooling 2min.58sec.

10min.

7min.

10min.

Within 7min. Cooling 2min.58sec.

ON

ON

Selected

Fan

OFF

OFF

ON

ON

OFF

OFF

Low Fan

–16–

ON

ON

OFF

OFF

ON

ON

Selected

Fan

OFF

OFF

ON

ON

Low Fan

OFF

OFF

11. Forced operation

• If you lose wireless remote controller, you can operate the unit with forced operation switch.

• The standard conditions are as following.

Operation Mode

FAN Speed

Setting Temp.

Room Temp°

√

24°C

Cooling

High

22°C

Heat pump Model

21°C °¥Room Temp°¬24°C

Soft Dry

Soft Dry Rule

Air Intake Temperature

Room Temp °¥21°C

Heating

High

24°C

• Unit operates in low fan mode for first 15 seconds, then switched to proper operation mode according to intake Air temperature.

Forced

Operation Button

Press the Forced Operation Button.

R

• Press the Forced Operation Button once again to stop operation.

12. Protection of the evaporator pipe from frosting

If the te

mperature of the indoor coil is below -2°C after 7 minutes from starting the compressor, the compressor and the outdoor fan is stopped, and then after 3 minute delay of the compressor and the temperature of the indoor coil is over 7°C, the compressor and the outdoor fan is reoperated.

Indoor fa

n operates at low speed (comp. OFF) or at selected speed (comp. ON)

13. Inlet grille open

Once the inlet grille is opened during operation of the unit, the unit automatically stops operation and the lamps will be turned-off. But memorized functions are still available.

When the inlet grille is closed again, the unit become waiting state for operation. From then, the unit can be operated by forced operation button or Start/Stop button of remote controller.

14. Test Operation

• When pressing forced operation switch about 3 seconds, the unit operates in cooling mode at high speed fan regardless of room temperature and resets in 18 min.

• During test operation, if remote controller signal is received, the unit operates as remote controller sets.

15. Auto Restarting Operation

• When the power is restored after a sudden power failure while in appliance operation, the mode before the power failure is kept on the memory and the appliance should be on the automatically operates in the mode on the memory.

• Operation Mode that is kept on the memory

- State of Operation ON/OFF

- Operation Mode/Setting Temp/Selected airflow Speed

- Sleep Timer Mode/Remaining Time of Sleep Timer(unit of hour)

• If no input by the remote controller or no switching of the slide switch within 7 hr after the appliance operates by the Auto Restarting operation, the appliance is forced to stop at the moment of 7-hr elapse.

–17–

Display Function

1. Heating Model

Operation Indicator

• Coolling, Soft Dry, Fan, Heating

Timer Indicator

• Timer Mode

Sleep Timer Indicator

• Sleep Mode

Deice Indicator

• Hot-start, Deice

Operation Indicator

• Coolling, Soft Dry, Fan, Heating

Timer Indicator

• Timer Mode

Sleep Timer Indicator

• Sleep Mode

Outdoor Unit Operation

• Outdoor Unit Operating

Note)

For normal operation after checking by test mode, you should press SW1 nine times for resetting or reconnect the power cord.

Self-diagnosis Function

1. Protection of the evaporator pipe from frosting

If the temperature of the indoor pipe is below -2°C after 7 mins from starting the compressor, the compressor and the outdoor fan is stopped, and then after 3 mins delay of the compressor and the temperature of the indoor pipe is over 7°C, the compressor and the outdoor fan is reoperated.

2. Thermistor Cut Off or Short

Cut Off/Short : Blinks on and off the operation mode LED. (0.5 sec ON/3 sec OFF)

–18–

Installation

1. Installation of Indoor, Outdoor Unit

1. Selection of the best location

1) Indoor unit

• There should not be any heat source or steam near the unit.

• There should not be any obstacles to prevent the air circulation.

• A place where air circulation in the room will be good.

• A place where drainage can be easily obtained.

• A place where noise prevention is taken into consideration.

• Do not install the unit near the door way.

• Ensure the spaces indicated by arrows from the wall, ceiling, or other obstacles.

R

More than

20cm

More than eye-level

(Ceiling installation)

More than

20cm

More than

20cm

R

More than

20cm

2) Outdoor unit

• If an awning is built over the unit to prevent direct sunlight or rain exposure, be careful that heat radiation from the condenser is not restricted.

• There should not be any animals or plants which could be affected by hot air discharged.

• Ensure the spaces indicated by arrows from the wall, ceiling, fence or other obstacles.

(Floor/Wall installation)

More than 10cm More than 10cm

3) Piping length and the elevation

MODEL

18K BTU

24K BTU

Pipe Size

GAS

1/2"

5/8"

LIQUID

1/4"

1/4"

Length A(m)

Rated

Max.

7.5

7.5

15

20

Elevation B(m)

Rated

Max.

* Additional refrigerant

(g/m)

5

5

8

8

30

30

• If 18K or 24K Model is installed at a distance of 15m, 225g of refrigerant should be added .........................................................(15-7.5) x 30g

–19–

More than 70cm

Indoor unit

B

A

Outdoor unit

2. Indoor unit installation

■

Before Installing, prepare Installation Plates

• 'Installation Plates' are attached at the bottom of indoor unit.

Detach them by removing each 3 screws at both sides.

• Detach 'Side Plate (R,L)' by removing each 2 screws on both sides.

• Pull the upper right and left side of 'Inlet Grille' to the front, and it will stop at slightly tilted position.

• Unhook the 'Inlet hanger' from the 'Hanger screw' on the both left and right side.

• Detach the 'Inlet Grille' from the Indoor Unit.

1) Installation on the ceiling

• Measure and mark the position for the Suspension bolts and the piping hole.

• Drill the hole for anchor nut on the ceiling.

Install Plate

1)

Inlet Grille

1076

Before secure the Installation Plates, select the bent direction of the Installion Plate to the inside or the outside according to the installation circumstances.

2)

R

Side Plate

Inlet hanger

Hanger screw

265

1236

Suspension bolt

Center-line for the piping hole

265

• Drill the piping hole on the wall slightly tilted to the outdoor side using a ø70 hole-core drill.

Indoor

WALL

Outdoor

5~7mm

–20–

• Insert the nuts and washer onto the suspension bolts for locking the suspension bolts on the ceiling.

• Mount the suspension bolts to the anchor-nuts firmly.

• Secure the Installation plates onto the Suspension bolts (adjust level roughly.) using nuts, washers and spring washers.

1)

Suspension bolts

Spring washer max.

12mm

Nut

Washer

Ceiling

Anchor nut

Nut

Suspension bolts

Washer

2)

• Engage 2 hooks on the both left and right side of the unit to the lower slot of Installation Plates.

• Adjust a level with a level gauge on the direction of left-right, back-forth by adjusting suspension bolts.

• Move the hooks on the unit to the upper slot of

Installation Plates. Then the unit will be declined to the bottomside so as to drain well.

Lower slot

Level gauge

R

Suspension bolt

Adjust a level

Installation plate

R

Upper slot

R

–21–

CAUTION

1. Install declination of the indoor unit is very important for the drain of the convertible type air conditioner.

2. Minimum thickness of the insulation for the connecting pipe shall be 7mm.

3. If the Installation Plates are fixed to horizontal line, the indoor unit after installing will be declined to the bottomside.

Front of view

• The unit must be horizontal or declined to the drain hose connected when finished installation.

Ceiling

Drain hose

Ceiling

Side of view

• The unit must be declined to the bottomside of the unit when finished installation.

Ceiling

–22–

• Secure the unit to the Installation Plates with four M8 bolts and washers.

R

• Hook up the Inlet Grille Hook to the cabinet.

• Hang the Inlet Hanger to the screw.

• Before working, refer to "Connecting pipe

and cable to Indoor Unit" on page 28, 31.

Inlet hanger

R

• Fit the projection hooks of the side plates to the 'Side

Panel' and the 'Front Panel' by lifting it.

• Fasten the screws.

Hook

Cabinet Bottom

1

R

2

R

–23–

2) Installation on the Wall

• Select and mark the position for fixing bolts and piping hole.

Decide the position for fixing bolts slightly tilted to the drain direction after considering the direction of drain hose.

• Drill the hole for anchor nut on the wall.

more than

260

1076

265

• Drill the piping hole on the wall slightly tilted to the outdoor side using a ø70 hole-core drill.

Indoor

Wall

Outdoor

• Secure the 'Install Plate' onto the wall with four anchor bolts, washers and spring washers.

Nut

Spring washer

Wall

Washer

Anchor nut

Less than

12mm

Before secure the Install Plates, select the bent direction of the 'Install Plate' to the inside or outside according to the installation circumstances.

1236

–24–

Install the Indoor unit onto Installation Plate.

• Insert 2 hooks on the both left and right side of the unit to the inner slot (wall side) of the Installation Plate.

• Secure the unit to the Installation Plate with four M8 bolts and washers.

R

Inner slot

• Hook up the Inlet Grille Hook to the cabinet.

• Hang the Inlet Hanger to the screw.

• Before working, refer to "Connecting pipe

and cable to Indoor Unit" on page 29, 31.

2

1

• Fit the projection hooks of the side plates to the 'Side

Panel' and the 'Front Panel' by lifting it.

• Fasten the screws.

–25–

3) Installation on the floor

Installation of Mount Bracket.

• Select and mark the position for Mount Brackets and the piping hole.

• Drill the hole for the anchor nut on the wall.

• Drill the piping hole using a ø70 hole-core drill.

• Secure the Mount Brackets on the wall with four M4 screws.

Install the indoor unit onto the Mount Brackets.

• Engage the slot at the back of the unit with Mount

Bracket.

Slot

Floor mount bracket

From the left wall more than 760mm

From the right wall more than 840mm

•

Drill the piping hole with 70mm dia, hole core drill.

• Piping hole should be slightly slant to the outdoor side.

Indoor

Wall

Outdoor

After Installing, reassemble detached parts.

• Hang the 'Inlet Grille' and hook the 'Inlet Hanger' to the

Hanger Screw.

• Assemble the 'Side Plates(R,L)' with 2 screws on both left and right side.

Slot

Wall

Floor mount bracket

Install plate

Piping hole

–26–

2. Piping and Drainage of Indoor Unit

2-1. Preparation of Piping

1. Cut the pipes and the cable.

• Use the accessory piping kit or the pipes purchased locally.

• Measure the distance between the indoor and the outdoor unit.

• Cut the pipes a little longer than measured distance.

• Cut the cable 1.5m longer than the length of the pipe.

2. Remove burrs.

• Remove burrs from cut edges of pipes.

• Turn the pipe end toward down to avoid the metal powder entering the pipe.

Caution:

If burrs are not removed, they may cause a gas leakage.

Point down

Pipe cutter

90

Pipe

Slanted Rough

Reamer

3. Flaring the pipes.

• Insert the flare nuts, mounted on the connection ports of both indoor and outdoor unit, onto the copper pipes. (When the flare nuts are removed from the indoor unit.) Some gas may leak, as some gas is charged to prevent the inside of the pipe from rusting.

• Fit the copper pipe end into the Bar of flare tool about 0~1.0mm higher. (See illustration)

• Flare the pipe ends.

• Carry out flaring work using dedicated flaring tool for R-410A.

"A"; ø15.88 mm (5/8")

ø12.7 mm (1/2")

ø9.52 mm (3/8")

ø6.35 mm (1/4")

1.0 mm

0.5 mm

0.5 mm

0.5 mm

Bar

Bar

Handle

Yoke

Cone

Copper pipe

Clamp handle

Red arrow mark

= Improper flaring =

4. Tape the flaring portion to protect it from the dust or damages.

Inclined Surface damaged

Cracked Uneven thickness

When properly flared, the internal surface of the flare will evenly shine and be of even thickness.

After the flare part comes into contact with the connectors, carefully check the flare finish.

–27–

2-2. Installation on the ceiling

1) Connecting the pipes to the indoor unit

The pipe can be connected to right side, bottom or back of the unit.

1. For the Right Side Piping

• After bending an end of the connecting tube, align the center of the pipings and sufficiently tighten the flare nut with fingers.

• Finally, tighten the flare nut with torque wrench until the wrench clicks.

• Connect the Drain Hose insulated to the drain outlet.

Drain hose should be go through under the Hose

Bracket as shown in figure .

• Hang the drain hose on the hose hanger and fix it to the hole of the hose bracket with a screw.

2. For the Bottom Side Piping

• Remove the knock-out on the bottomside of Inlet Grille

• Align the center of the pipings and sufficiently tighten the flare nut with fingers.

• Finally, tighten the flare nut with torque wrench until the wrench clicks.

• Connect the Drain Hose insulated to the drain outlet.

• Hang the drain hose on the hose hanger and fix it to the hole of cabinet bottom with a screw.

2) Connecting the Drain Hose

• The drain hose can be connected to not only the right side but also left side of the unit.

• If the drain hose is connected to the left side, it should go through the cabinet bottom.

• Hang the drain hose on the hose hanger and fix it to the hole of cabinet bottom with a screw.

R

2

R

R

4

Piping

Drain Hose

Hose Hanger

5

Hose

Hanger

1

Hose

Bracket

3

Hose Hanger

Drain Hose

BOTTOM

–28–

2-3. Installation on the wall or floor

1) Connecting the pipes to the indoor unit

1. For the Right Rear Piping

• Remove the knock-out at the back side of the cabinet.

• After bending an end of the connecting tube, align the center of the pipings and sufficiently tighten the flare nut with fingers.

• Finally, tighten the flare nut with torque wrench until the wrench clicks.

• Connect the Drain Hose insulated to the drain outlet.

• Tape the Drain Hose to the pipings to avoid coming off the drain-outlet.

2. For the Right Side Piping

• After bending an end of the connecting tube, align the center of the pipings and sufficiently tighten the flare nut with fingers.

• Finally, tighten the flare nut with torque wrench until the wrench clicks.

• Connect the Drain Hose insulated to the drain outlet.

• Tape the Drain Hose to the pipings to avoid coming off the drain-outlet.

3. For the Right Bottom Piping

• Align the center of the pipings and sufficiently tighten the flare nut with fingers.

• Finally, tighten the flare nut with torque wrench until the wrench clicks.

• Connect the Drain Hose insulated to the drain outlet.

Piping

Taping

Drain Hose

Taping

Drain Hose

Taping

Drain Hose

Connecting

Cable

2) Connecting the Drain Hose

• The drain hose can be connected to not only right side but also left side of the unit.

Piping

Piping

Drain Hose

REAR

BOTTOM

–29–

3. Connecting Pipes to the Outdoor Unit

1) Connecting the pipes to the Outdoor unit

1. Align the center of the pipings and sufficiently tighten the flare nut with fingers.

2. Finally, tighten the flare nut with torque wrench until the wrench clicks.

• When tightening the flare nut with torque wrench, ensure the direction for tightening follows the arrow on the wrench.

Outdoor unit

Pipe Size

1/4"

Liquid Side

3/8"

Gas Side

1/2"

5/8"

Torque

1.8kg·m

4.2kg·m

5.5kg·m

6.6kg·m

Gas side piping

(Bigger Dia.)

Liquid side piping

(Smaller Dia.)

Torque wrench

4. Checking the Drainage

1) Checking the Drainage

1. Remove the Air Filter.

• To remove air filter, take hold of tab and pull slightly upwards.

R

2. Check the drainage.

• Spray one or two glasses of water upon the evaporator.

• Ensure that water flows drain hose of indoor unit without any leakage.

R

–30–

5. Connecting Cables between Indoor Unit and Outdoor Unit

1) Connecting cables to the Indoor Unit

1) Remove the Air guide - L by loosening 2 screws after removing the Inlet grille from the Indoor unit.

2) Connect the wires to the terminals on the control board individually according to the outdoor unit connection.

• Ensure that the color of the wires of outdoor unit and the terminal No. are the same as those of indoor unit respectively

• Cooling only type

Terminals on the indoor unit 1(L) 2(N) 3 4

POWER

INPUT

Terminals on the outdoor unit 3 4

• Cooling & Heating type

Terminals on the indoor unit 1(L) 2(N) 3 4 5 6

GN/YL

7 8

POWER

INPUT

GN/YL

AIR GUIDE-L

INDOOR UNIT

Clamp

1

R

Control

Panel

Terminals on the outdoor unit 3 4 5 6 7

2

2) Clamping of cables

1) Arrange 2 power cables on the control panel.

2) First, fasten the steel clamp with a screw to the inner boss of control panel.

3) For the cooling model, fix the other side of the clamp with a screw strongly.

For the heat pump model, put the 0.75mm

2 cable(thinner cable) on the clamp and tighten it with a plastic clamp to the other boss of the control panel.

4) In Australia, the length of power supply cord measured from the entry of the power supply cord to the middle of live pin on the power plug should be over 1.8m.

The power cord connected to the indoor unit should be complied with the following specifications

(Type H05VV-F(Indoor) approved by HAR or SAA).

NORMAL CROSS-

SECTIONAL AREA

• 2.5mm

2

(24K)

• 2.0mm

2

(18K)

CAUTION

The power connecting cable

connected between the indoor and outdoor unit should be complied with the following specifications

(Type H07RN-F approved by HAR or SAA).

NORMAL CROSS-

SECTIONAL AREA

• 2.5mm

2

(24K)

• 2.0mm

2

(18K)

The connecting cable connected between the indoor and outdoor unit should be complied with the following specifications

(Type H07RN-F approved by HAR or SAA).

NORMAL

CROSS-

SECTIONAL

AREA

0.75mm

2

–31–

3) Connecting the cable to Outdoor Unit

1. Remove the Cover control from the unit by loosening a screw.

Connect the wires to the terminals on the control board individually as following.

2. Secure the cable onto the control board with the holder (clamper).

3. Refix the cover control to the original position with the screw.

4. Use a recongnized circuit breaker 20A(18K, 24K) between the power source and the unit. A disconnection device to adequately disconnect all supply lines must be fitted.

Outdoor unit

Terminal block

Over 5mm

Holder for power supply cord

Cover control Holder for connecting cable

Power supply cord

Connecting cable

CAUTION

After the confirmation of the above conditions, prepare the wiring as follows:

1) Never fail to have an individual power specialized for the air conditioner. As for the method of wiring, be guided by the circuit diagram pasted on the inside of control box cover.

2) Provide a circuit breaker switch between power source and the unit.

3) The screw which fasten the wiring in the casing of electrical fittings are liable to come loose from vibrations to which the unit is subjected during the course of transportation. Check them and make sure that they are all tightly fastened. (If they are loose, it could give rise to burn-out of the wires.)

4) Specification of power source

5) Confirm that electrical capacity is sufficient.

6) Be sure that the starting voltage is maintained at more than 90 percent of the rated voltage marked on the name plate.

7) Confirm that the cable thickness is as specified in the power sources specification.

(Particularly note the relation between cable length and thickness.)

8) Never fail to equip a leakage breaker where it is wet or moist.

9) The following troubles would be caused by voltage drop-down.

• Vibration of a magnetic switch, damage on the contact point there of, fuse breaking, disturbance to the normal function of a overload protection device.

• Proper starting power is not given to the compressor.

10) The means for disconnection from a power supply shall be incorporated in the fixed wiring and have an air gap contact separation of at least 3mm in each active(phase) conductors.

–32–

4) Form the pipings

1. Wrap the connecting portion of indoor unit with the Insulation material and secure it with two

Plastic Bands. (for the right pipings)

• If you want to connect an additional drain hose, the end of the drain-outlet should keep distance from the ground. (Do not dip it into water, and fix it on the wall to avoid swinging in the wind.)

In case of the Outdoor unit being installed below position of the Indoor unit.

2. Tape the Pipings, drain hose and Connecting

Cable from bottom to top.

3. Form the pipings gathered by taping along the exterior wall and fix it onto the wall by saddle or equivalent.

Seal a small opening around the pipings with gum type sealer.

Taping

Drain hose

Plastic Band

Pipings

Connecting cable

Power supply cord

Trap is required to prevent water from entering into electrical parts.

In case of the Outdoor Unit being installed above position of the Indoor Unit.

2. Tape the Pipings and Connecting cable from bottom to top.

3. Form the pipings gathered by taping along the exterior wall, and make the trap prevent water from entering into the room.

4. Fix the pipings onto the wall by saddle or equivalent.

Seal a small opening around the pipings with gum type sealer.

Trap

–33–

6. Air Purging of the Pipes and Indoor Unit

The air which contains moisture remaining in the refrigeration cycle may cause a malfunction on the compressor.

1. Confirm that both the liquid side valve and the gas side valve are set to the closed position.

2. After connecting the piping, check the joints for gas leakage with gas leak detector.

3. Remove the service port nut, and connect the gauge manifold and the vacuum pump to the service port by the charge hose.

4. Vacuum the indoor unit and the connecting pipes until the pressure in them lowers to below -76cmHg.

5. Remove the valve stem nuts, and fully open the stems of the 2-way and 3-way valves with a hexagon wrench.

6. Tighten the valve stem nuts of the 2-way valve and 3-way valve.

7. Disconnect the charge hose and fit the nut to the service port.

(Tightening torque: 1.8kg.m)

Indoor unit

Liquid side

2-way valve/

3-way valve

Closed Outdoor unit

Gas side

3-way valve

Closed

Vaccum pump

OPEN CLOSE

–34–

7. Test running

1) Connection of power supply

1. Connect the power supply cord to the independent power supply.

• Circuit breaker is required.

2. Prepare the remote control.

• Insert two batteries provided.

Remove the battery cover from the remote controller.

• Slide the cover according to the arrow direction.

Insert the two batteries.

(Two "R03" or "AAA" dry-cell batteries or equivalent.)

• Be sure that the (+) and (-) directions are correct.

• Be sure that both batteries are new.

Re-attach the cover.

• Slide it back into position.

3. Operate the unit for fifteen minutes or more.

2) Evaluation of the performance

1. Measure the temperature of the intake and discharge air.

2. Ensure the difference between the intake temperature and the discharge one is more than 8°C

(Cooling) or reversely (Heating).

3) Selection of the slide switch according to installation method (Heating model only)

1. In case the indoor unit is installed on the floor, please change the side switch which is on the

Main PCB Assembly to the 'BOTTOM' state.

2. In case the indoor unit is installed under the ceiling, please change the slide switch which is on the Main PCB Assembly to the ' CEILING' state.

The initial state of the slide switch is set for the bottom installation.

–35–

Thermometer

R

Operation

(1) Name and Function-Remote controller

1) Cooling Model

3

4

5

6

Remote Controller

Signal transmitter.

Transmits the signals to the room air conditioner.

ON OFF

SET CANCEL

1

7

2

8

9

10

11

1

OPERATION DISPLAY

Displays the operation conditions.

2

START/STOP BUTTON

Operation starts when this button is pressed and stops when the button is pressed again.

3

OPERATION MODE SELECTION BUTTON

Used to select the operation mode.

4

ON/OFF TIMER BUTTONS

Used to set the time of starting and stopping operation.

5

TIME SETTING BUTTONS

Used to adjust the time.

6

TIMER SET/CANCEL BUTTONS

Used to set the timer when the desired time is obtained and to cancel the Timer operation.

7

AIR FLOW DIRECTION START/STOP BUTTON

Used to stop or start louver movement and set the desired up/down airflow direction.

8

SLEEP MODE AUTO BUTTON

Used to set Sleep Mode Auto operation.

9

AIR CIRCULATION BUTTON

Used to circulate the room air without cooling or heating (turns indoor fan on/off).

10

ROOM TEMPERATURE CHECKING BUTTON

Used to check the room temperature.

11

RESET BUTTON

Used prior to resetting time or after replacing batteries.

–36–

3

4

5

6

2) Heat Pump Model

Remote Controller

Signal transmitter.

Transmits the signals to the room air conditioner.

ON OFF

SET CANCEL

7

2

1

8

9

10

11

1

OPERATION DISPLAY

Displays the operation conditions.

2

START/STOP BUTTON

Operation starts when this button is pressed and stops when the button is pressed again.

3

OPERATION MODE SELECTION BUTTON

Used to select the operation mode.

4

ON/OFF TIMER BUTTONS

Used to set the time of starting and stopping operation.

5

TIME SETTING BUTTONS

Used to adjust the time.

6

TIMER SET/CANCEL BUTTONS

Used to set the timer when the desired time is obtained and to cancel the Timer operation.

7

AIR FLOW DIRECTION START/STOP BUTTON

Used to stop or start louver movement and set the desired up/down airflow direction.

8

SLEEP MODE AUTO BUTTON

Used to set Sleep Mode Auto operation.

9

AIR CIRCULATION BUTTON

Used to circulate the room air without cooling or heating (turns indoor fan on/off).

10

ROOM TEMPERATURE CHECKING BUTTON

Used to check the room temperature.

11

RESET BUTTON

Used prior to resetting time or after replacing batteries.

–37–

Disassembly of the parts (Indoor unit)

Warning :

Disconnect the unit from power supply before making any checks.

Be sure the power switch is set to “OFF”.

1. Remove the air filter.

• Pull the inlet grille slightly toward you.

• Pull out the air filter. (2 pieces)

Inlet Grille

2. Remove the girlle from chassis

• Remove the screws securing the side plate and push to the bottom-side.

• Unhook the hanger from the hanger screw at the left and the right side.

• Pick out the inlet grille.

R

4

Hanger

3

Hanger

Screw

2

1

3. Remove the lower air guide

• Remove a screw of both side fixing "barrier airguide".

• Remove the screws of both sides of the lower airguide.

• Remove the lower air-guide toward “arrow mark” by turning upwards as shown in figure.

R

Barrier Air guide

Lower Air guide

–38–

4. Remove air guide upper, crossflow fan and motor.

• Remove the screws of both sides and center securing the upper air-guide.

• Remove 2 screws fastening the bracket of door switch.

Door

Switch

R

• Remove a bearing assembly by removing a screw and the bearing cover.

• Remove 4 screws securing the motor cover.

• Loosen the screw securing the crossflow fan to the fan motor shaft. (do not remove)

• Remove the crossflow fan by sliding it out from the shaft of fan motor.

Motor

Cover

Bearing

Cover

R

Bearing

5. Remove the control box Assembly.

• Disconnect the step motor connector, fan motor connector, display PCB connector, thermistor connector and door switch connector from the main PCB.

• If necessary, disconnect power supply cord and connecting cable from the terminal block and remove the cord clamp screw.

• Remove 2 screws securing the control box and pick out the control box carefully.

–39–

R

6. Remove the front panel.

• Remove the screws of both sides fixing the front panel.

• Push the upper side of front panel strongly to pull out the front panel from the inner hook of diffuser frame.

• Pull down the front panel carefully not so as to harm the display PCB wires and thermistor wires.

Diffuser frame

Front

Panel

R

Diffuser frame

Hook

Front

Panel

7. Remove the diffuser assembly.

• Remove the screws of both side of diffuser assembly. (4 pieces)

• Push the upper side of cabinet strongly to pull out the inner hook of diffuser frame from the cabinet hole.

• Take up the diffuser frame carefully not so as to harm the display PCB wires and the step motor wires.

Diffuser frame

Hook

Cabinet

8. Remove display PCB assembly.

• Remove the screws at the both side of display cover.

• If necessar y, disconnect the display PCB connector from PCB assembly.

• Remove 2 screws of PCB assembly.

R

Display Cover

–40–

9. Remove the vane-upper, vane-lower and step motor.

• Remove 2 screws securing the step motor assembly and pull it out from the vanes carefully.

• Unhook the vanes from the vane supporter and remove the upper vane and lower vane by pulling the center of vanes with care.

Step Motor

Vane Supporter

10. Remove the drain pan assembly.

• Remove the both side of screws. (4 pieces)

• Pull out the drain pan assembly.

• Be careful not to harm to the EPS packing of drain pan and the tubings of evaporator.

Lower Vane

Upper Vane

11. Remove the evaporator.

• Remove the screws of both sides securing the

EVA barrier-R/L on the side cabinet.

• Remove the screws which fasten the barrier on the evaporator and take out the barrier assembly.

• Remove the evaporator assembly by sliding toward arrow mark. (As shown in figure)

EVA. Barrier-L

EVA. Barrier-R

–41–

Side Cabinet

Cycle

1. Installation (Connecting the piping between indoor and outdoor unit)

Indoor unit

Liquid side

2(3)-Way valve

Outdoor unit

Gas side

3-Way valve

Gas cylinder

Lo

R-407C

Purge the air

• Installation

(1) Connect the piping between the indoor and outdoor unit firmly.

– Incorrect connection may cause the leakage and incomplete vacuuming.

(2) Attach the charging hose (manifold gage) to the service port.

– Charging hose is necessary to check the pressure and to inject N

2 for leakage test.

– The valve of charging hose must be closed before being connected.

(3) Inject the 100~300g N

2 through the charging hose opening the valve.

(4) Check the joint part using a gas detector or soapy water for leakage.

– On checking, the service valve of main service port must be closed, this test is only for checking whether pipe connection is OK or not.

(5) If there is no leakage, discharge N

2 in piping completely into tank for retrieving.

– Completely discharge is needed for vacuuming.

– If leakage is found, please fasten the joint more tightly.

(6) After closing the valve of charging hose, disconnect the tank and connect the vacuum pump to charging hose and open the valve again for vacuuming.

(7) Turn on the vacuum pump until the pressure drops below 0 kg/cm

2

.

(8) After vacuuming, disconnect the vacuum pump and open the spindle of service port (liquid-side) slightly for 30 sec and then open the spindle of service port (gas side) with hexagonal wrench.

(9) Open the liquid side completely first and then the gas side fully in order.

–42–

2. Disconnection (on moving)

Indoor unit

Liquid side

Closed

2(3)-Way valve

Gas side

3-Way

Closed valve

Retrieving Tank

Lo

Outdoor unit

• Disconnection

(1) Attach the charging hose (manifold gage) to the service port.

– Connect the manifold gage once to the service port not stopping. Stopping in the middle of process may cause the leakage.

(2) Purge the air in hose into special device such as retrieving tank opening the valve of charging- hose (gas side) slightly and then close it tightly.

(3) Operate the air conditioner for 10~15 min until cycle is stabilized.

(4) Close the spindle of service port (liquid sidehigh pressure) and wait till pressure of gas side (low pressure) drops below 0 kgf/cm

2

.

(5) After the needle of gage indicates below

0 kgf/cm

2

, close the valve of gas side quickly and turn off the power.

(6) Disconnect the piping between indoor and outdoor unit and then put on service cap to the service port.

–43–

3. Gas Charging

(After Evacuation)

Indoor unit

Liquid side

2(3)-Way

Open valve

Outdoor unit

Charging cylinder

Check valve

(1)

OPEN

Lo

Gas side

3-Way valve

Open

CLOSE

• Procedure

(1) Connect the charge hose to the charging cylinder.

– Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder.

– If you are using a gas cylinder, also use a scale and reverse the cylinder so that the system can be charged in liquid state.

(2) Purge the air from the charge hose.

– Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air. (Be careful of the liquid refrigerant). The procedure is the same if using a gas cylinder.

(3) Open the valve (Lo side on the charge set and charge the system with liquid refrigerant.

– If the system can not be charged with the specified amount of refrigerant, it can be charged with a little at a time (approximately

150g each time) while operating the air conditioner in the cooling cycle; however, one time is not sufficient, wait approximately 1 minute and then repeat the procedure.

\

This is different from previous procedures.

Because you are charging with liquid refrigerant from the gas side, absolutely do not attempt to charge with larger amounts of liquid refrigerant while operating the air conditioner.

(4) Immediately disconnect the charge hose from the 3-way valve’s service port.

– Stopping par tway will allow the gas to be discharged.

– If the system has been charged with liquid refrigerant while operating the air conditioner, turn off the air conditioner before disconnecting the hose.

(5) Mount the valve stem nuts and the service port nut.

– Use torque wrench to tighten the service port nut to a torque of 1.8 kg.m.

– Be sure to check for gas leakage.

–44–

Cycle Troubleshooting Guide

Trouble analysis

1. Check temperature difference between intake and discharge air and operating current.

Temp. difference : approx. 0°C

Current : less than 80% of rated current

All amount of refrigerant leaked out

Check refrigeration cycle

Temp. Difference

Temp. difference : approx. 8°C

Current : less than 80% of rated current

Refrigerant leakege

Clog of refrigeration cycle

Defective compressor

Operating Current

Temp. difference : less than 8°C

Current : over the rated current

Excessive amount of refrigerant

Temp. difference : over 8°C

Normal

Notice :

Temperature difference between intake and discharge air depends on room air humidity. When the room air humidity is relativery higher, temperature difference is smaller. When the room air humidity is relatively lower temperature difference is larger.

2. Check temperature and pressure of refrigeration cycle.

Suction pressure

(Compared with

Temperature

(Compared with the normal value) the normal value)

High

Higher

Normal

Cause of Trouble

Defective compressor

Defective 4-way reverse valve

Excessive amount of refrigerant

Description

Current is low

Lower Higher

Insufficient amount of

Clogging

High pressure does not quickly rise at the beginning of operation

Current is low

Current is low

NOTICE :

1. The suction pressure is usually 8.5~9.5 kg/cm 2 G at normal condition.

2. The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with putty.

–45–

Electronic Parts Troubleshooting Guide

Possible Trouble 1

: The unit does not operate.

Is the input voltage of transformer AC220V?

YES

Is the output voltage of transformer about AC14V?

YES

NO

NO

NO

Is the input voltage of IC01D DC14V?

YES

Is the output voltage of IC01D DC12V?

YES

NO

NO

Is the output voltage of IC02D DC5V?

YES

Is the PIN 29 of

Micom DC5V?

YES

NO

NO

Is the PIN 55,64 of

Micom DC5V?

YES

Exchange Micom

Is shorted the transformer output?

YES

NO

Check the FUSE and the wiring diagram

Check the RY-COMP PIN 3 and CN-4WAY PIN 1

Check the main P.C.B

pattern

Exchange the transformer

Exchange D01D-D05D

Exchange IC01D

Exchange IC02D

Exchange IC01A

Check the 5V P.C.B

pattern

–46–

Possible Trouble 2

: The indoor fan does not operate.

Is it DRY mode?

NO

YES

Does the temperature set all right?

YES

NO

Adjust set temperature

Is it the HOT mode?

NO

YES

Does the temperature set all right?

YES

NO

Adjust set temperature

Is IC02M operated normally?

YES

NO

Is the each S.S.R

any problem?

NO

YES

Check the fan motor and connector.

(CN-FAN)

Exchange IC02M

Exchange S.S.R

–47–

Possible Trouble 3

: Up/Down Air direction louver does not operate.

NO

Is IC01M operated normally?

YES

Is the PIN 1 of

CN-UP/DOWN DC12V?

YES

Check the step motor and connector

(CN-UP/DOWN 1,2)

NO

Exchange IC01M

Check the main P.C.B

DC12V pattern

Possible Trouble 4

: Remote controller does not operate.

Is the battery consumed much?

NO

YES

NO

Is the PIN 8 of CN-DISP

DC5V?

YES

Is the connection of

CN-DISP all right?

YES

Exchange receiver ass'y

NO

–48–

Exchange the battery

Check the main P.C.B

DC5V pattern

Connect CN-DISP exactly

Possible Trouble 5

: Ineffective Heating

Is 4way-valve operated?

YES

NO

NO

Is IC02M operated normally?

YES

Check the RY-4WAY and 4way-valve

Check RY-4WAY

Exchange IC02M

Possible Trouble 6

: The unit does not operate by forced operation switch.

Is the F/OP key any problem?

NO

Check P.C.B pattern check

YES

Exchange F/OP key

–49–

Electronic control device

(1) MAIN P.C.B ASM (CV-H186BLB0, CV-H246BLB0)

(2) DISPLAY P.C.B ASM (P/No.: 6871AQ3263A)

–50–

Schematic Diagram

–51–

Exploded View and Replacement Parts List

1. Indoor Unit

–52–

Parts List (Heat Pump Models)

LOCATION

NO.

166000

235450

237900

261704

263230

267110

268712

330870

130911

135314

137213

137213

146811

152302

159911

159911

342800

346811

352115

35211A

352150

354211

359010

W0CZZ

738280

738281

DESCRIPTION

CABINET ASSY

GRILLE ASSY, INLET SUB

PANEL ASSY, SIDE

PWB(PCB) ASSY, MAIN

MOTOR ASSY, STEP

FILTER(MECH), A/C

VANE ASSY, HORIZONTAL

VANE ASSY

SWITCH, PUSH

DISPLAY ASSY (MECH)

WINDOW, DISPLAY

TRANSFORMER, POWER

THERMISTOR ASSY

REMOTE CONTROLLER ASSY

PWB(PCB) ASSY, DISPLAY

DRAIN PAN ASSY

BEARING

MOTOR ASSY, INDOOR

TUBE ASSY, EVA-IN

TUBE ASSY, SUCTION INDOOR

HOSE ASSY, DRAIN

EVAPORATOR ASSY

FAN ASSY, CROSS FLOW

CAPACITOR

MANUAL, OWNERS

MANUAL, SERVICE

CV-H186BLB0

3091AP2533A

5237A10002K

3720AP2767P

6871A20042H

4681AR2727G

5230AP7093A

5991AP2867B

5991AP7334C

6600AP2059B

3545AP7224A

3790AP7080A

6171AQ3198E

6323AQ2333Y

6711A20010K

6871AQ3263A

3087AP7233A

3H02821B

4681AP2306G

5211AP2810J

5211AP2813B

5251AP2460B

5421AP2812A

5901AR2351E

3H00671A

3828A20147D

3828A20059X

PART No.

CV-H246BLB0

3091AP2533A

5237A10002K

3720AP2767P

6871A20042H

4681AR2727G

5230AP7093A

5991AP2867B

5991AP7334C

6600AP2059B

3545AP7224A

3790AP7080A

6171AQ3198E

6323AQ2333Y

6711A20010K

6871AQ3263A

3087AP7233A

3H02821B

4681AP2306E

5211AP2810J

5211AP2813A

5251AP2460B

5421AP2812A

5901AR2351E

3H00671A

3828A20147D

3828A20059X

REMARK

–53–

2. Outdoor Unit

–54–

Parts List (Heat Pump Models)

LOCATION

NO.

552203-1

552203-2

554031

554160

559010

561410

649950

W0CZZ-1

W0CZZ-2

349480

435311

435512

437210

437212

546810

552111

552202

DESCRIPTION

ORIFICE

GRILLE, DISCHARGE

COVER ASSY, TOP(OUTDOOR)

PANEL ASSY, FRONT

PANEL ASSY, REAR

MOTOR ASSY, OUTDOOR

TUBE ASSY, CAPILLARY

VALVE, REVERSING

VALVE, SERVICE

VALVE, SERVICE

CONDENSER ASSY, BENT

COMPRESSOR SET

FAN ASSY, PROPELLER

COIL ASSY, REVERSING VALVE

CONTROL BOX ASSY, OUTDOOR

CAPACITOR, DRAWING

CAPACITOR, DRAWING

CV-H186BLB0

4948AP2527A

3530A20007B

3H03266K

3721A20005Q

3720AP0003D

4681A20013T

5211A10039T

3A02027A

2H01890D

2H02479F

5403A20022F

2520UWFP2AA

1A00195B

3A02028Y

4995A20027M

3A00988B

2A00986D

PART No.

CV-H246BLB0

4948AP2527A

3530A20007B

3H03266K

3721A20005Q

3720AP0003D

4681A20013X

5211A30331R

3A02027A

2A00392E

2H02479F

5403A20022F

2520UWJP2BA

1A00195B

3A02028Y

4995A20027N

6120AR2094T

2A00986D

REMARK

–55–

P/No.: 3828A20059X

June, 2003

Printed in Korea