Fujitsu Airstage J-II Service Manual

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Page 1

Small VRF system

for light commercial and home use

SERVICE MANUAL

Page 2

Page 3

CONTENTS

1. TEST RUN

1-1 EXECUTION PROCEDURE AND EXECUTION PRECAUTIONS.............................

1-2 TEST RUN METHOD..................................................................................................

1-2-1 Check Items Before Power ON............................................................................

1-2-2 Check Items After Power ON...............................................................................

1-2-3 Automatic address setting procedure for Signal amplifiers.................................. 01-06

1-2-4 Automatic address setting procedure for indoor units..........................................

1-2-5 Indoor unit connection check procedure ............................................................. 01-08

1-2-6 Test run from the outdoor unit ............................................................................ 01-09

1-2-7 Test run from the Remote controller .................................................................... 01-09

1-3 TEST RUN CONTROL................................................................................................

1-4 Field Setting And Monitor Mode List....................................................................... 01-11

2. OUTDOOR UNIT OPERATION CONTROL

01-01 01-03 01-03 01-04

01-07

01-10

2-1 INPUT / OUTPUT LIST..............................................................................................

2-2 COMPRESSOR OPERATION....................................................................................

2-2-1 Operation / Stop Condition.................................................................................

2-2-2 Capacity Control.................................................................................................

2-2-3 Speed Range of Start,Stop,and Operation..........................................................

2-3 FAN CONTROL..........................................................................................................

2-3-1 Cooling Operation...............................................................................................

2-3-2 Heating Operation...............................................................................................

2-3-3 Low noise mode..................................................................................................

2-3-4 Other Control.......................................................................................................

2-4 EXPANSION VALVE CONTROL...............................................................................

2-5 SPECIAL OPERATION..............................................................................................

2-5-1 Oil Recovery Operation......................................................................................

2-5-2 Pre-Heat Operation............................................................................................

2-5-3 Defrost Operation Control..................................................................................

2-6 PROTECTIVE FUNCTION........................................................................................

2-6-1 Protective Function List......................................................................................

02-01 02-02

02-02

02-02 02-03

02-05 02-05 02-06

02-07

02-08

02-09 02-09 02-10

02-10

02-11 02-11

Page 4

3. INDOOR UNIT OPERATION

CONTENTS

3-1 FAN CONTROL..........................................................................................................

3-1-1 Fan Speed Setting...............................................................................................

3-1-2 "AUTO" Position...................................................................................................

3-2 MASTER CONTROL..................................................................................................

3-2-1 Operation Mode Control.......................................................................................

3-2-2 Auto Changeover.................................................................................................

3-2-3 "COOL" Position..................................................................................................

3-2-4 "HEAT" Position..................................................................................................

3-3 LOUVER CONTROL..................................................................................................

3-4 ELECTRONIC EXPANSION VALVE CONTROL......................................................

3-5 DRAIN PUMP OPERATION.......................................................................................

3-6 FUNCTION..................................................................................................................

3-6-1 Auto Restart.........................................................................................................

3-6-2 Icing Protection Control.......................................................................................

3-6-3 Oil Recovery Operation.......................................................................................

3-7 TIMER CONTROL......................................................................................................

3-7-1 Wireless Remote Controller................................................................................

03-01 03-01

03-01 03-02 03-02 03-04 03-05 03-05

03-06

03-09 03-09 03-10 03-10 03-10 03-10 03-11 03-11

3-7-2 Group Remote Controller..................................................................................... 03-13

3-7-3 Wired Remote Controller..................................................................................... 03-15

4. TROUBLE SHOOTING

4-1 NORMAL OPERATION..............................................................................................

4-1-1 Indoor Unit Display..............................................................................................

4-1-2 Outdoor Unit Display...........................................................................................

4-2 ABNORMAL OPERATION.........................................................................................

4-2-1 Indoor Unit Display..............................................................................................

4-2-2 Outdoor Unit Display...........................................................................................

4-2-3 Error Code List for Outdoor Unit..........................................................................

4-2-4 Remote Controller Display...................................................................................

4-2-5 Error Code List for Simple and Wired Remote Controller...................................

4-2-6 Error Code List for Group Remote Controller......................................................

4-2-7 Trouble Level of System.....................................................................................

4-2-8 Error History Mode..............................................................................................

4-3 TROUBLE SHOOTING.............................................................................. ...............

04-01 04-01

04-02

04-03 04-03 04-04 04-05 04-06

04-07

04-08 04-10

04-11

4-3-1 Trouble Shooting With Error Code (INDOOR UNIT)...........................................

4-3-2 Trouble Shooting With Error Code (OUTDOOR UNIT).......................................

4-3-3 Trouble Shooting for Optional Parts....................................................................

4-4 SERVICE PARTS INFORMATION............................................................................ 04-84

04-11 04-22 04-63

Page 5

CONTENTS

5. APPENDING DATA

5-1 REFRIGERANT CIRCUIT..........................................................................................

05-01

5-2 WIRING DIAGRAM....................................................................................................

5-2-1 Indoor Unit............................................................................................................

5-2-2 Outdoor Unit.........................................................................................................

5-3 CHARACTERISTICS OF SENSORS........................................................................

5-3-1 Pressure sensor..................................................................................................

5-3-2 Thermistor resistance..........................................................................................

5-3-3 Saturation temperature and saturation pressure tables (R410A)........................

5-3-4 Temperature and pressure of refrigerant (Graph)...............................................

6. DISASSEMBLY PROCESS

05-02

05-18

05-19

05-20 05-21 05-22

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Page 7

1. TEST RUN

Page 8

Page 9

1. TEST RUN

1-1 EXECUTION PROCEDURE AND EXECUTION PRECAUTIONS

Before execution

Location decision

Confirmation of Refrigerant used

Preparation of execution drawings

Confirmation of installation site

Preparation before execution

Execution 1/2

Sleeve and insert work

Indoor unit installation

Refrigerant piping work

Drain piping work

Duct work

Heat insulation work

Electrical work

Outdoor unit foundation work

Execution procedure and precautions Reason

Do not install the units in the place not recommended in the installation manual.

Check the characteristics of the refrigerant used and grasp the special features of the refrigerant. If refrigerant must be charged, always charge the refrigerant specified for the product.

*Confirm the product design pressure. < R410A 4.20MPa >

Prepare the design for the system

Use new refrigerant piping of the thickness specified by the

D&T manual.

Since R410A dedicated tools are necessary, prepare them in advance.

Absolutely avoid use of existing piping. If use of existing piping is unavoidable, the piping must be cleaned.

Always use a level and keep the indoor unit level. If the equipment is tilted toward the drain port, install it so that the tilt is within 10mm. Excessive tilt will cause water leakage.

When performing piping work, observe the following items so that the inside of the piping is clean and air tight.

Use pipe that is not dirty inside. Confirm the design for the piping ( Diameter, Thickness )

2 3

When the pipe is left standing, protect it. Confirm the angle of separation tube and header correctry.

Finish flaring exactly.

Confirm the width across flats dimension and shape of flare nuts.

Always blow nitrogen while brazing.

Perform flushing before connecting the equipment.

Always make the downward slope of the drain pipe 1/100 or

greater and make the horizontal length within 20m. Use hard polyvinylchloride pipe as the drain pipe.

Support the drain pipe between 1.5 to 2.0m.

Use pipe of 1 rank up (VP30 or greater) as central piping.

Select the size of the heat insulating material according to the ambient temperature and relative humidity of the refrigerant. Use a heat insulating material having a heat conductivity of 0.043W/ (m.k) or less.

The performance may drop significantly due to the protection controlling

Use of a refrigerant other than the specified refrigerant will invite equipment trouble

Secure the necessary pressure resistance.

Prevention of water leakage

Foreign matter, water, etc. in the piping will cause faulty cooling and compressor trouble. Incorrect pipe diameter will cause faulty cooling Incorrect angle of separation tube or header will be cause poor cooling or refrigerant noise problem Refrigerant leakage will cause low performance and abnormal stopping

Prevention of water leakage

Outdoor unit installation

Refrigerant piping connection work

Air tightness test

Vacuum drying

When making flare connections always use a torque wrench and tighten the flare nut positively to the specified torque.

Pressurize the product with nitrogen gas up to the design pressure and conduct a 24Hr air tightness test.

Install a vacuum pump with reverse flow check mechanism or a

reverse flow check adaptor to a conventional vacuum pump and use. Pump down sufficiently.

Approximately 1 hour or longer after -0.10MPa reached. Allow to stand for approximately 1 hour after stopping the vacuum pump and confirm that the needle does not return. Air purging using refrigerant is strictly prohibited.

Vaccuming mode

This function is used for vacuuming the indoor unit and the connection piping.

Note: For starting Vaccuming mode, the refrigerant address setting has to be finished.

Refrigerant leakage will cause low performance and abnormal stopping.

Mixing in of vacuum pump oil by reverse flow will cause equipment trouble. recommend the vacuuming mode

When the [vacuuming mode] is set, <Push switch setting, F3:21> EEV of connected all indoor units opens. So, the vacuuming indoor unit and piping becomes easier.

When the vacuuming ends, please turn off the power supply for all of the indoor units and the outdoor unit, [vacuuming mode] is released.

01-01

Page 10

Execution 2/2

Execution procedure and precautions Reason

Addition refrigerant charging

Gas leak test

Initial setting

Confirm the additional refrigerant amount with the installation

manual, etc. Always take the R410A refrigerant from the cylinder liquid phase

and charge it using the gas phase. (Do not lay a cylinder with siphon pipe on its side.)

Use an R410A dedicated gauge manifold and charging hose. Charge refrigerant using the liquid pipe.

When the defined amount of refrigerant cannot charge using the

liquid pipe, charge refrigerant using the gas pipe while opearing the cooling test run. Charge refrigerant bit by bit with cautious operation of valve for the liquid refrigerant back prevention.

Use an R410A dedicated leak tester to check for gas leaks.

Set the refrigerant circuit address.

ROTARY SW: REF ADX10, X1

Confirm the DIP SW setting SET 1: Factory setting, SET 2 : All OFF, SET 3 : All OFF, SET 4: Factory setting

Confirm the Terminal resister setting

SET 5-4 OFF: Disable, ON: Enable

[Note] Perform in the power OFF state.

If taken from the air phase, since the composition of the refrigerant which is charged will change, low performance and abnormal stop will occur easily. Prevent erroneous sealing in of refrigerant.

A leak tester for other than R410A cannot detect leaks.

Dual address setting No. is not allowed in one network.

If the DIP SW setting is wrong, the sys tem may not work correctly

If the Terminal resister setting is wrong, the system may detect transmission error

Piping length setting

Address setting for Signal Amp

- When using signal Amps -

Address setting for Indoor unit

Set according to the length of the connection piping. Set to "Standard (40 to 65m)" at the factory. Set using the push button SW on the outdoor unit main PCB. < Refer to the Page 01-16 Setting mode F2-00 > Set the pipe length to be the nearest indoor unit from the outdoor unit

When the setting is not same as the real piping length, the system may not work correctly.

If the pipe length is set as the farthest indoor unit, the nearest operating indoor unit may be stopped the operation by the icing up protection as by over cooling.

[Note] Perform in the power ON state after all indoor units have stopped operation

When setting the address of Signal amplifier, please refer to the installation manual of the signal amplifier. The address setting can be set by automatically from 1 outdoor unit on the network. < Refer to the Page 01-06 Setting mode F3-10 >

Dual address setting No. is not allowed in one network.

[Note] Manual setting: Set the rotary SW on the PCB in the power OFF state.

Automatic address setting:

Perform setting by push button SW on the outdoor unit Main PCB in the

power ON state after all indoor units have stopped operation.

Set the refrigerant circuit address and indoor unit address. Can be set by rotary SW on the indoor unit PCB ( Main PCB or Switch PCB) or from a remote controller or from a push button SW on the outdoor unit Main PCB < Automatic address setting, Refer to the Page 01-07 Setting mode F3-11>

Dual address setting No. is not allowed in one network.

[Note] Manual setting: Set the rotary SW on the PCB in the power OFF state.

Automatic address setting:

Perform setting by push button SW on the outdoor unit Main PCB in the

power ON state after all indoor units have stopped operation.

Indoor unit connection check

Test run & adjustment

Turnover & explanation of operation

Before starting the system, check on the number of indoor units and the total capacity. < Refer to the Page 01-08 Setting mode F3-12 >

Normal operation will not be possible without performing the indoor unit connection check.

[Note] Perform setting by push button SW on the outdoor unit Main PCB in the power ON state after all indoor units have stopped operation.

01-02

Page 11

1-2 TEST RUN METHOD

1-2-1 Check Items Before Power ON

Power

source

Outdoor

unit

Check contentsProcedure

Circuit breaker capacity

Type of power source wiring

Supply power source

Wiring on terminal blocks

Appearance

Serial No.

Outside air temperature

Power source wiring connection

Type of communication line

Communication line connection

Connection piping

DIP-SW setting

Rotary SW setting

Additional refrigerant amount

3-way valve

Judgement standard

Outdoor unit: 32A ( AJ*A36,45,54LALH )

Indoor unit: 20A

Leakage current: 30mA 0.1sec or less

Install a breaker (Included with Earth Leakage Circuit Breaker) in accordance

with the related laws and regulations.

Outdoor unit: 6mm

Indoor unit: 2.5mm2 2 wires + Ground

Outdoor unit side: AC 230V (220-240V)

Indoor unit side: AC 230V (220-240V)

Use crimp-type terminals with insulating sleeves for stranded conductor cable

Shall be no scratches, deformation, etc. (Be careful of deformation of the front panel)

Shall be checked and entered in the check sheet.

Connection points check & loose terminal block screws check

0.33mm2, shielded wire used (22AWG)

Connection points check & loose terminal panel screws check

Check whether or not the heat insulation material is installed without a gap.

DIP SW SET1, SET4 : Factory setting, SET2,SET3, SET5-1,2,3: ALL OFF Terminal resistor setting SET5 - 4 OFF: Disable, ON: Enable Check the resistance value for each network segment

Refer to the installation manual 7.7

Refrigerant circuit address setting (SET : REF AD x10 and REF AD x1)

Comparison of calculated value and value written on electrics box. Entered in check sheet.

Refer to the installation manual 8.3.2

Gas pipe: fully open

Liquid pipe: fully open

2 wires + Ground 4mm

Check

Indoor

unit

[Note] If operated with the 3-way valve closed, the oil discharged from the compressor will not be returned and will lead to trouble.

Appearance

Serial No.

Drain cap installation

Power source wiring connection

Type of communication line

Communication line connection

Type of remote controller wiring

Remote controller wiring connection

Connection piping

Rotary SW setting

DIP-SW setting

There shall be no scratches, deformation, tilting, etc.

Shall be checked and entered in the check sheet.

Shall be installed positively.

Connection points check & loose terminal panel screws check

0.33mm2, shielded wire used (22AWG)

Connection points check & loose terminal panel screws check

0.33mm

Connection points check & loose terminal panel screws check

Check whether or not the heat insulation material is installed without a gap.

Refrigerant circuit address (REF AD)

Indoor unit address (IU AD)

At automatic address setting, IU AD/REF AD shall be [0].

Remote controller address (RC AD)

Function setting (Remote controller custom code/ external input switching/

auxiliary heater ON-OFF)

01-03

Page 12

1-2-2 Check Items After Power ON

[Note] Cooling test run for each refrigerant circuit. If multiple refrigerant circuits are test run at the same time, refrigerant circuit address setting errors cannot be detected.

Power ON

Outdoor unit Main

PCB push button SW setting/check

Address

setting/

check

Indoor unit

connection check

Cooling

test run

Check contentsProcedure

Outdoor unit circuit breaker ON

Indoor unit circuit breaker ON

Check lighting of Main PCB LED101 and 7-segment display.

Check whether or not indoor unit OPERATION and TIMER lamps flash alternately.

Judgement standard

Check

[Note] Turn on all indoor units power in the same refrigerant circuit address. When the system operates with the indoor units remaining no power, it is cause of malfunction.

Function setting

Automatic address setting

Address read

Address record

Address hold check

Indoor unit connection check

Are the necessary functions set ? < For the setting, Refer to the page 01-15 18 >

Addresses shall be assigned to all indoor units / Signal amps. Check for unset or duplicated addresses. < For the setting, Refer to the page 01-06, 07 >

All the indoor units and outdoor units of the same refrigerant circuit can be checked on the service tool.

Enter the set addresses in the check sheet.

Check whether or not the address setting is held by the service tool after indoor/outdoor circuit breakers were turned OFF to ON.

Are the number of connecting indoor units correct ? Is the total capacity of indoor units correct ? < For the checking, Refer to the page 01-08 >

〜

[Note] Before connecting service tool, the address setting has to be completed.

Outdoor unit push button

SW operation

All the indoor units in the same refrigerant state.

The outdoor units corresponding to the operation capacity of the indoor

units shall operate. < Test operation procedure, Refer to the page 01-09,10 >

circuit

shall enter the coolingtest run

All of the

indoor units

operation

(after 30 mins)

High pressure

Low pressure

Discharge pipe temperature (outdoor unit)

Suction pipe temperature (outdoor unit)

Inlet air temperature (indoor unit)

Heat exchange inlet temperature (indoor unit)

Heat exchange outlet temperature (indoor unit)

Compressor operation

Data output

HPS: 2.7 MPa

LPS: 0.9 MPa

TH1: 81°C

TH4: 15°C

TH21: 27°C

TH22: 11°C

TH24: 13°C

Shall operate corresponding to the operation capacity of the indoor units.

Service tool used, output (CSV Excel)

Outdoor Main PCB 7-seg. display

Operation voltage

Abnormal sound/

abnormal vibration

There shall be no Error information on the 7-segment display on the Main PCB.

Between L - N AC230V (220-240V)

These shall be no abnormal sound or abnormal vibration.

The outdoor fan shall not make a moaning sound.

There shall be no discharge air leaking from the outdoor duct.

There shall be no pipe chattering sound or flute sound generated.

Outlet air temperature

Abnormal sound/abnormal vibration

Water leakage check

Remote controller operation

Inlet air temperature and outlet air temperature difference shall be 10°C or

greater.

There shall be no abnormal sound or abnormal vibration.

There shall be no water leakage. There shall be no condensation on the drain,

cabinet, piping, and discharge port.

Shall operate according to the settings. (ON-OFF, set temperature change)

01-04

Page 13

Indoor unit

individual

operation

Check contentsProcedure

Judgement standard

Fan operation

Louver operation (except duct)

Outlet air temperature

Abnormal sound/abnormal vibration

Water leakage check

Remote controller operation

Shall be switched to all fan speeds in the cooling mode.

Louver shall be switched to all positions. Shall also swing.

Inlet air temperature and outlet air temperature difference shall be 10°C or

greater.

There shall be no abnormal sound or abnormal vibration.

There shall be no water leakage. There shall be no condensation on the drain,

cabinet, piping, and discharge port.

Shall operate according to the settings. (ON-OFF, set temperature change)

Check

These are representative figures of AJYA54LALH at the standard condition. ( Indoor : 27

°C, Outdoor : 35°C ) If conditions are different from those above mentioned, the figures will be changed slightly. It depends on following conditions.

Outdoor unit capacity Indoor and outdoor temperature Indoor unit capacity Pipe length etc

Trouble shooting on Test run operation

1. Error occured

- Check on the Error code on the Remote controller or Indoor unit or Outdoor unit or Service tool and check the description of the Error code. < Refer to the Trouble shooting in the Service manual.> < Refer to the Execution of precautions 1-1 and Check item Before power ON 1-2-1>

2. No good performance without error code

- Check if the protection controlling is operating or not Evaporator Icing up protection, High discharge temperature protection,etc. < Refer to the part of protection controlling in the Service manual >

- Check on the refrigerant circuit Refrigerant amount, Pipe blockage, Wrong position of separation pipes etc. < Refer to the Execution of precautions 1-1 and Check item Before power ON 1-2-1> < Refer to the regulation of installation in the Installation manual>

01-05

Page 14

1-2-3 Automatic address setting for signal amplifiers When using signal amplifiers

SWITCH POSITION

Outdoor unit printed circuit board

When setting the address of the signal amplifier, please use the factory setting. (See the installation manual of the signal amplifier)

When the system is normal, nothing will be displayed on the 7 segment display.

When ERROR is displayed, inspect the units. Use the “MODE/EXIT”, “SELECT”, and “ENTER” buttons on the outdoor unit Main PCB to conÞ gure settings according to the procedures below.

1: FUNCTION Setting

First 2 digits Last 2 digits

(the display when the main power is turned on)

MODE/EXIT

POWER

ERROR

MODE

LED101

LED102

(GREEN)

(RED)

LED105 LED104

MODE

SELECT ENTER

/EXIT

SW107 SW108 SW109

7 Segment LED Lamp

Push button switch

SELECT

(When [F4] to [F9] are displayed, continue to press the "SELECT" button until [ F3 ] is displayed)

ENTER

Automatic address setting for

signal ampliÞ ers

SELECT

ENTER

Press the “SELECT” button until "10" is displayed

Press the “ENTER” button for more than 3 seconds

End

ENTER

MODE/EXIT

* Setting is complete when the number of unit is displayed

01-06

Page 15

1-2-4 Automatic address setting for Indoor units

SWITCH POSITION

Outdoor unit printed circuit board

Check that the rotary switch IU AD on the indoor unit Main PCB is set to “00”.If it is not set to “00”, it means the address of that device is not set. (Factory default is “00”).

Turn on the power of the indoor and outdoor units.

When the system is normal, nothing will be displayed on the 7 segment display. When ERROR is displayed, inspect the units.

Use the “MODE/EXIT”, “SELECT”, and “ENTER” buttons on the outdoor unit Main PCB

1: FUNCTION Setting

First 2 digits Last 2 digits

(the display when the main power is turned on)

MODE/EXIT

POWER

ERROR

MODE

LED101

LED102

(GREEN)

(RED)

LED105 LED104

MODE

SELECT ENTER

/EXIT

SW107 SW108 SW109

7 Segment LED Lamp

Push button switch

to configure settings according to the procedures below .

First 2 digits

SELECT

ENTER

Last 2 digits

SELECT

ENTER

(When [F4] to [F9] are displayed, continue to press the “SELECT” button until [F3] is displayed.)

Automatic address setting for indoor units

Press the “SELECT” button until “11” is displayed.

Press the “ENTER” button for more than 3 seconds.

It may take about 10 minutes for completing the processing.

Found

End

Error

ENTER

The number of indoor units with normal settings will be displayed at the first 2 digits of the 7 segment display. The number of indoor units with error will be displayed at the last 2 digits.

NOTE) After the “ENTER” button is pressed, the end processing will occur for about 30 seconds. During this period, the 7 segment will blink.

01-07

Page 16

1-2-5 Indoor unit connection check

SWITCH POSITION

Outdoor unit printed circuit board

Please perform the indoor unit connection check according to following procedures.

Turn on the power • of indoor unit and outdoor unit.

LED105

LED104

MODE/EXIT

Set to Function mode [F3].

SELECT

POWER

ERROR

MODE

LED101

LED102

(GREEN)

(RED)

LED105 LED104

MODE

SELECT ENTER

/EXIT

SW107 SW108 SW109

7 Segment LED Lamp

Push button switch

SELECT

continue to press the “SELECT” button until [F3] is displayed.)

ENTER

(When [F4] to [F9] are displayed,

SELECT

Press the “SELECT” button until “12” is displayed.

ENTER

Press the •

“ENTER”

button for

more than 3 seconds.

When indoor unit connection check can not be performed

This will be displayed when the • Indoor unit connection check starts.

ENTER

(*1)

Confirm the number of connected indoor • units and the volume ratio of the indoor units connection.

SELECT

ENTER

When error occurs

(*1) The number of connected

indoor units Ex.) When 8 units are connected

(*2)

(*2) Volume ratio of the indoor

units connection

Ex.) When the ratio is 120%

Exit indoor unit connection check • mode.

01-08

Please refer to the following “Error code” for details

ENTER

[ Note ] Error code

22.1: Connecting Indoor units capacity error

24.2: Connecting number of indoor unit error

26.1: Dual address number is existing

Other Error code: Refer to the Trouble shooting

MODE/EXIT

When it finishes normally, nothing will be displayed on 7 segment display.

Page 17

1-2-6 Test Run From Outdoor Main PCB

All the indoor units connected to the outdoor unit can be test-operated by push button setting.

SWITCH POSITION

POWER

MODE

ERROR

LED101

(GREEN)

LED102

(RED)

7 Segment LED Lamp

LED105 LED104

Outdoor unit printed circuit board

MODE

/EXIT

SW107 SW108 SW109

SELECT ENTER

Push button switch

TEST RUN SETTING

For a detailed description of push button operation, refer to the [D&T manual Chapter 6. SYSTEM DESIGN]

< Monitoring condition >

LED105 LED104

MODE / EXIT

Note

There are the following 2 methods of resetting test operation.

Automatic reset when 60 minutes has elapsed.(1)

Reset when operation stop was performed.(2)

< Mode select condition >

[ Monitoring mode ] [ Setting mode ]

SELECT

ENTER

LED105 LED104LED105 LED104 LED105 LED104LED105 LED104

< Fuction select condition >

[ Cooling test run ]

LED105 LED104

ENTER

SELECT

Press the ENTER button for at least 3 seconds.

[ Heating test run ]

< Pursuance completion >

LED105 LED104

SELECT

[ Function mode ]

SELECT

[ Error history mode ]

[ Central control setting

[ Test run stop ]

SELECT

LED105 LED104

SELECT

Forced reset ]

LED105 LED104

ENTER

Press the "ENTER" button or Time out ( 5 seconds)

< Return to mode select condition >

LED105 LED104

MODE / EXIT

< Return to monitoring condition >

LED105 LED104

01-09

example, Normal indicate : [ Cooling mode ]

Page 18

1-2-7 Test Run From Remote Controller

1. Standard wired remote controller

Stop the indoor unit. Push the button and button simultaneously for more than two seconds. The air conditioner will start to conduct a test run and " " will display on the remote controller display. However, the , setting button does not have function, but all other buttons, displays, and protection functions will operate.

Perform the test operation for 60 minutes.

To stop test run, push the START / STOP button of the standard wired remote controller. For the operation method, refer to the operating manual and perform operation check. Check that there are no abnormal sounds or vibration sounds during test run operation.

UTY - RNK

SET TEMP.

TIMER MODE

CLOCK ADJUST

SET BACK

TIMER DELETE TIMER SET

DAY

DAY OFF

START / STOP

FAN MODE

2. Standard wireless remote controller

Press the TEST RUN button on the remote controller, while the air conditioner is running. To end test run operation, press the remote controller START / STOP button.

When the air conditioner is being test run, the OPERATION and TIMER lamps of indoor unit flash slowly at the same time.

3. Simple remote controller

Stop the indoor and outdoor units. Push the remote controller simultaneously for more than three seconds. The air conditioner will start to conduct a test

run and " " will display on the temperature display. However the setting button does not have function but all other buttons, displays and protection functions will operate.

button and

button

START / STOP button

TEST RUN button

UTY - LNH

START

STOP

ECONOMY

FILTER RESET

SET

TEMP.

SLEEP

TIMER

TIMER MODE

CLOCK

TEST

ADJUST

RUN

UTY - RSK

FANMODE

SET

SWING

RESET

To stop test running press the button of the simple remote controller. For the operation method refer to the operating manual and perform operation check. Check that there are no abnormal sounds or vibration sounds during test run operation.

01-10

SET

Page 19

UTY-DCG

Monitor - All

Coll

℃

25.0

Setup Menu

Central Controller Setting

05/31 03:59

Indoor unit Special setting

Select All

Off

Operation

Details

Monitor Group

Setup Menu

Help

Indoor unit Special Setting

Test Operation

Indoor Unit Set Temp. Range

Test Operation

RCG_05

05/31 03:59

Filter Sign

R.C. Prohibition

05/31 03:59

Group

Select All

Identify Unit

Clear Unit

[ Select All (F2) ]: All of R.C.Group (Indoor units) [ Identify Unit (F3) ] : Specific R.C.Group (Indoor unit)

Page 20

5. Touch panel controller

Test run operating procedure

UTY - DTG

Monitor Mode

All

Lange Group

Office A

Cool

21.5 C

Room

101

Off

Meeting 1

Heat

21.5 C

Conference

Heat

21.5 C

Group Error

Schedule Filter Sign

Op.Controlled Op.Restricted

Monitor Mode

All

Lange Group

Name

Office A

Expand

Top Up

Office B

Heat

21.0

Restrant

Auto

24.0 C

Meeting

Off

Conference B

Auto

22.0

Mode Set Temp.

Top Up

Status Mode

Heat

10/11.2008.Mar. 02:20 PM

Down

PC Room

Entrance

Meeting

Parking lot

Off

10/11.2008.Mar. 02:20 PM

Down

Set Temp

21.5 C

Fan

High

R/C Prohibit

List

Cool

26.0 C

Auto

24.0

Heat

21.0

List

Status: On

Setting

Schedule

(1)

Select All

Clear All

Operation

(1)

(2)

Off

( * )

Status: On

Setting

Schedule

(1)

Office B

PC Room

Mixed

Mixed Mixed Mixed

Auto

24.0 C

Low

Mixed

Select All

Clear All

Room 101

Restrant

Entrance

Meeting 1

Group Error

Schedule Filter Sign Op. Controlled Op. Restricted

Off

RC Prohibition All On/Off On

Cool

Mode Temp. Timer

26.0 C

Filter

Auto

Operation

Off

(1) Select the objective you want to test run. Select the objective icon or list at the monitor screen. (Multiple selections is possible) Select all the devices registered as objectives by pressing "Select All" on the monitor screen.

(2) After objective selection at (1), switch to the <Setting screen> by pressing "Operation".

01-12

(1)

(2)

( * )

Page 21

Operation Setting

Control Unit :

operation

Off

Air Flow Direction Economy Anti Freeze Filter Sign Test Operation

Optional

Setting

Cancel

Meeting Room

Mode Set Temp. Fan

Auto

24.0 C

Cool

Dry

Fan

Heat

Operation Controlled

10/11.2008.Mar. 02:20 PM

R/C Prohibition

All

Auto

High

Med

Low

Quiet

On/Off

Mode

Temp.

Timer

Filter

Status: On

(3) Switch to the <Details setting screen> by pressing "Optional Setting" on the setting screen.

( * )

(3)

Operation Setting

10/11.2008.Mar. 02:20 PM

Status: On

SettingOptional

Air Flow Direction

Down

Swing

Left Right

Cancel

Economy

Off

Test

Special State

Stand by (Defrost) Stand by (Oil Recovery) Test Operation

Anti Freeze

Operation

Off

Filter Sign

Reset

Start

(4)

(5)

(4) Send (start) test run by pressing "Start" and then pressing "OK" on the details setting screen. Test run continues for 60 minutes. During sending, the slave screen shown below is displayed. When sending is completed, the sending slave screen and details setting screen are closed.

To interrupt test run, select the device being test run and execute an operation stop command.

(*) At the monitor screen, test run is reset by stopping operation

Transferring data. Please wait.

of the objective devices by pressing "OFF". (*) Or test operation is reset by stopping operation of the objective devices by pressing "Off" of Operation and then pressing "OK" on the setting screen.

01-13

Page 22

1-3 TEST RUN CONTROL

1. When the test run signal is transmitted from standard wired, wireless remote controller, simple remote controller, transmitted network, and outdoor unit.

(1) The test run operation starts and the electric expansion valve is controlled to a maximum flow, regardless of the temperature condition.

(2) Frost prevention operation has priority over item(1). (3) Whether state of the indoor unit operates or stops, All units in the same refrigerant circuit will start to conduct a test run in accordance with the operation mode set by push switch of outdoor unit ( see 1 - 2 - 3 ). (4) After 60 minutes passes, the test run stops. (5) Test running initialization is shown below.

Operating Mode

Fan speed Hi Hi

Room Temperature Indication 18 30

Vertical Air Direction Panel

Swing

*EXAMPLE

EXCEPT FOR THE DUCT MODEL DUCT TYPE

Cooling Heating Cooling Heating

Hi Hi

18 30

Position

OFF OFF

Position

COMPACT CASSETTE TYPE

CEILING TYPE

COMPACT WALL MOUNTED TYPE

01-14

Page 23

1-4 Field Setting And Monitor Mode List for Outdoor unit

Push switch onoutdoor unit PCB

Monitor mode

[ F1 ]

Classification

Device and system

Operation of each part

Time guard 20 Accumulated current time Accumulated current time is displayed

Refrigerant cycle data 1

Refrigerant cycle data 2

ITEM CODE No.

00 Connected number of indoor unit The number of the communicating unit is displayed

Software version of outdoor unit

02 Software version of INV PCB

03 Software version of communication PCB

10 Rotational speed of outdoor unit fan motor The rotational speed of the outdoor unit fan motor is displayed

11 Rotational speed of INV compressor The rotational speed of the compressor is displayed

12 Current value of INV compressor Current value of INV compressor is displayed

14 Pulse of EEV1 Pulse of EEV1 is displayed

Pulse of EEV2 Pulse of EEV2 is displayed

21 INV compressor accumulated time

[ Cooling ]

22 INV compressor accumulated time

[ Heating ]

30 Information on Thermistor 1

( INV compressor discharge temperature )

Information on Thermistor 3

( Outdoor temperature )

33 Information on Thermistor 4

( Suction temperature )

Information on Thermistor 5

( Heat-exchanger temperature )

Information on Thermistor 7

( Liquid temperature 2 )

Information on Thermistor 8

( Sub-cool heat-exchanger inlet temperature )

38 Information on Thermistor 9

( Sub-cool heat-exchanger outlet temperature )

39 Information on Thermistor 10

( INV compressor temperature )

Information on pressure sensor 1

( High pressure sensor )

Information on pressure sensor 2

( Low pressure sensor )

Setting Mode

Information contents

Software version :

[ ] [ ] [ ] [ ] [ ] displays by five items

It skips when there is no suffix

[ rpm ]

[ rps ]

[ A ]

[ pls ]

[ 10 hour ]

Accumulated time is displayed in the cooling operation of the INV compressor [ 10 hour ] Accumulated time is displayed in the heating operation of the INV compressor [ 10 hour ]

The value of the Thermistor 1 is displayed

[°C ] or [°F ]

The value of the Thermistor 3 is displayed

[°C ] or [°F ]

The value of the Thermistor 4 is displayed

[°C ] or [°F ]

The value of the Thermistor 5 is displayed

[°C ] or [°F ]

The value of the Thermistor 7 is displayed

[°C ] or [°F ]

The value of the Thermistor 8 is displayed

[°C ] or [°F ]

The value of the Thermistor 9 is displayed

[°C ] or [°F ]

The value of the Thermistor 10 is displayed

[°C ] or [°F ]

The value of the pressure sensor 1 is displayed [ MPa ] or [ psi ]

The value of the pressure sensor 2 is displayed

[ MPa ] or [ psi ]

01-15

Page 24

Push switch on outdoor unit PCB

Setting mode

[ F2 ]

Classification

ITEM CODE No.

Setting Mode

ITEM CODE No.

Install 00 Pipe length setting 00 40-65m

01 0-40m 02 65-90m 03 90-120m

Correction 10

Sequential start shift

Setting is forbidden

04 00 01 02

Setting is forbidden

Standard

Cooling capacity shift 00 Normal mode

01 Save energy mode 1 (+2°C) 02 High power mode 1 (-2°C)

03 High power mode 2 (-4°C) 04 High power mode 3 (-5°C)

Heating capacity shift

00 Normal mode 01 Save energy mode (-2°C) 02 High power mode 1 (+2°C) 03 High power mode 2 (+4°C)

13 Defrost setting shift 00 End temperature:Normal

01 End temperature:Higher

Change of

function 1

14 Pressure equalization time shift

before defrosting start

20 Switching between forced stop or 00 Forced stop

emergency stop

00 No time shift

01 Shift 1 ( 30 sec.) 02 Shift 2 ( 60 sec.) 03

Shift 3 ( 90 sec.)

Shift 3 ( 120 sec.)

01 Emergency stop

21 Operation mode selecting method 00 Priority given to the first command

01 Priority given to the external input of outdoor unit 02 Priority given to the master indoor unit

Snow falling protection fan mode

Setting is forbidden

Interval setting for snow falling protection fan mode

Setting is forbidden

High static pressure mode

Setting is forbidden

Oil recovery

Setting is forbidden

00 Normal operation 01 00 Standard 01 02 03 00 Standard 01 02

Standard

00 01

02 03

Oil recovery Abnormal

low pressure protection control

Setting is forbidden

27 Error code Notification

00 01

Standard

Enable Disable

28 Change of unit (Temperature) 00 Celsius(°C)

01 Fahrenheit ( F)

29 Change of unit (Pressure) 00 MPa

01 psi Change of function 2

30 Energy saving level setting 00 Level 1 (stop)

01 Level 2 (operated at 40% capacity)

02 Level 3 (operated at 60% capacity)

03 Level 4 (operated at 80% capacity)

04 Level 5 (operated at 100% capacity)

Heating Starting prosess

Setting is forbidden

Low noise 40 Capacity priority setting 00 Off (quiet priority) setting 1

(in low noise mode)

41 Low noise mode setting

Standard

01 On (capacity priority)

00 Off (Normal)

01 On (Low noise mode operation is always done)

Change of function 3

Change of function 4

Low noise mode operation level

Setting is forbidden

Back up operation

Setting is forbidden

Electricity meter No. setting 1

(Set the ones digit and tens digit of the No of the electricity meter connected to CN135.)

Electricity meter No. setting 2

(Set the hundreds digit of the No. of the electricity meter connected to CN135.)

Electricity meter pulse setting 1

(Set the ones digit and tens digit of the No. of the electricity meter pulse setting connected to CN135.)

Electricity meter pulse setting 2

(Set the hundreds digit and thousands digit of the electricity meter pulse setting connected to CN135.)

*3 : When electricity meter No. is set to "000" and "201 to 299", the pulses input to CN135 become ineffective. Available setting number is "001" to "200" *4 : When the electricity meter pulse setting is set to "0000", the pulses input to CN135 become ineffective. Available setting number is "0001" to "9999"

Setting is forbidden: Any of problems caused by changing these setting is not covered by the warranty.

Only for solution :

Only when the refrigerant noise during Defrosting was pointed out. It is the case that the

00 Standard (47dB)

00 Standard

00~99 Setting number x00~x99

( Refer to Design & Technical Manual for details.)

00~02 Setting number 0xx~2xx 00

( Refer to Design & Technical Manual for details.)

00~99 Setting number xx00~xx99 00

( Refer to Design & Technical Manual for details.)

00~99 Setting number 00xx~99xx 00

( Refer to Design & Technical Manual for details.)

compressor operating time in heating will be shorter.

01-16

Setting Function

Only for solution

Default

Page 25

Push switch on outdoor unit PCB

Function mode

[ F3 ]

ITEM CODE No.

Forced operation 00 Cooling test run

01 Heating test run Forced thermostat-ON in Heating.

Install and maintenance 1

02 Test run stop Test run is stopped.

10 Signal amplifier automatic address Automatic address setting operates for signal amplifier.

11 Indoor unit automatic address

Setting Mode

Setting Function

Forced thermostat-ON in Cooling.

Automatic address setting operates for indoor unit of same refrigerant circuit.

Indoor unit connection check

Install and maintenance 2

Clear 30 Error history clear All the abnormal code histories are cleared.

Reset 40 Abnormal reset It was displayed when abnormality occurs, and abnormal

Specialtyfunction 91 Foreced Central control function release

21 Vacuuming mode Vacuuming mode operatesRefer to page 01-01 for the function.

32 Current time clear Accumulated current time becomes [ 0 ]

33 INV compressor accumulated time clear Accumulated time of the INV compressor becomes [ 0 ]

34 Constant Speed compressor accumulated

time clear

35 Field setting all clear Return to default the all set items.

Clear memorized information of "F3 - 12 " ( Indoor unit connection check )

*

Maximum memorized indoor unit number reset

Foreced Normal operation release Normal operation foreced release

The number of indoor units and the total capacity of indoor units of same refrigerant circuit.

Not in Use on J-Series

The information of the number of indoor units and the total capacity of indoor units are cleared.

code is reset.

This is a function that uses to clear abnormal display after the repair is completed.

Please operate the switch after power off or power on the outdoor unit. Maximum memorized indoor unit number is reset.

"E14.5:Indoor unit number shortage" error is cleared.

When the centralized control device failure, and the centralized control setting cannot be released, this function is used.

All the limitations set with the centralized control device are released.

Push switch on outdoor unit PCB

Error History Mode

[ F9 ]

Error history

ITEM CODE No.

Meaning of Error History Number

1 time ago (Newest)

2 times ago

3 times ago

4 times ago

5 times ago

6 times ago

7 times ago

8 times ago

9 times ago

10 times ago (Oldest)

Information contents

When the error occurred, the error code is memorized up to 10 on Main PCB.

If the memorized error code becomes over 10, the oldest one will be erased.

Refer to Chapter 4.TROUBLE SHOOTING

4-2-3 Error Code List of Outdoor unit

< Reset Error Item List By Abnormal Reset Setting >

Compressor Motor Loss of Synchronization Compressor 1 Temperature Abnormal Inverter Compressor Start Up Error Discharge Temperature 1 Abnormal Low Pressure Abnormal Current Sensor 1 Error Trip Detection Rush Current Limiting Resistor Temp Rise Protection Outdoor Unit FAN motor 1 Lock Error Outdoor Unit FAN motor 2 Lock Error

01-17

Page 26

1-5 Field Setting / Function Setting for Indoor unit

23 Vertical airflow direction 00 Default

02 Right half

Correction

Cool air temperature trigger

00 Default (0°C)

Indoor unit field setting

setting by remote controller

Classification

Address

Filter 11 Filter indicator Interval 00 Default

Airflow 20 Ceiling airflow 00 Default

ITEM CODE No.

01 Indoor unit address 00~63 00~63 00 02 Refrigerant circuit address 00~99 00~99 00

13 Filter sign display 00 Enable

(Cassette type only) 01 High ceiling

24 Horizontal swing airflow direction 00 Default

Static Pressure setting

Setting Mode

- Slim Duct Only -

The Range of static pressure is different from one model to other.

31 Heat air temperature trigger 00 Default (0°C)

Temperature correction in Auto

Change of 40 Auto restart 00 Enable Function 1

43 Cool air prevention 00 Enable

46 External control 00 Start / Stop

47 Error report target 00 All

ITEM CODE No.

Longer

01 02 Shorter

01 Disable 02 Display only on central remote control

01 Raise

01 Left half

0 Pa

10 Pa

20 Pa

30 Pa

40 Pa

50 Pa

60 Pa

70 Pa

80 Pa

90 Pa

25 Pa

01 Temperature overshoot setting (+2 02 Temperature undershoot setting (-2

01 Temperature undershoot setting (-6 02 Temperature slightly undershoot setting (-4 03 Temperature overshoot setting (+4

Disable

Enable (Nonfunctional on J2 Series)

01 Disable

01 Disable (Ventilation mode)

01 Emergency stop

01 Display only for central remote control

Setting Function

Model name Range of static pressure AR XD 07L ATH AR XD 09 LATH AR XD12L ATH AR XD14L ATH AR XD18LAT H AR XD 24L ATH 0 to 50 Pa

0 to 90 Pa

°C)

Default

01-18

Page 27

2. OUTDOOR UNIT OPERATION CONTROL

Page 28

Page 29

2. OUTDOOR UNIT

2-1 INPUT / OUTPUT LIST

Discharge pressure sensor <HIGH> Pressure sensor Measure range 0.0 to 5.0MPa Suction pressure sensor <LOW> Pressure sensor Measure range 0.0 to 1.7MPa Discharge temperature sensor <TH1> Themistor <Blue> Outdoor temperature sensor <TH3> Themistor < - > Suction temperature sensor <TH4> Themistor <Red>

Heat exchanger temperature sensor <TH5> Themistor <Pink> Liquid temperature sensor <TH7> Themistor <Green>

Sub-cool heat exchanger (inlet) sensor <TH8> Themistor <White> Sub-cool heat exchanger (outlet) sensor<TH9> Themistor <Brown>

Compressor temperature sensor <TH10> Themistor < - > Measure range 10 to 130 Operation current sensor Pressure switch

Rotary SW & DIP-SW & Push SW

Input / output or kind of detail Control range

Measure range 10 to 130 Measure range -25 to 58 Measure range -35 to 70 Measure range -35 to 70 Measure range -35 to 70 Measure range -35 to 70 Measure range -35 to 70

Current transformer Pressure switch

Address and function setting

Open 4.2MPa Short 3.2MPa

O U T P U T

Communication Input / Output

External Input / Output

LED display

Compressor Electronic expansion valve 1 (Main) EEV coil Operating voltage DC12V

Electronic expansion valve 2 (SC-Hex) EEV coil Operating voltage DC12V Fan motor 1 (Upper) DC Brushless motor Fan motor 2 (Lower) DC Brushless motor 4-way valve 4-way valve coil AC220-240V, 50/60Hz 6/5 W Solenoid valve Comp pressure equalizing valve AC220-240V, 50Hz, 6W Crank case heater For Inverter Compressor AC240V, 25W

Base heater Field supply AC220-240V, 35W

LON WORKS Inverter communication

External input 1 (CN131) (Low noise mode operation) External input 2 (CN132) (Cooling / Heating priority) External input 3 (CN133) (Outdoor unit operation peak control) External input 4 (CN134) (Emergency stop operation)

External output 1 (CN136) (Error display) External output 2 (CN137) (Operation display)

Single LED 101 Single LED 102 7 Segment LED

Magnetic relay

Indoor unit Outdoor unit

Dry contact input

ON (Error) / OFF (Normal) ON (Operation) / OFF (Stop)

Display the information on operation, error and setting with single LED and 7 segment LED.

Operation coil AC220-240V, 50Hz

Control output: DC 0/12-24V, Max.30mA Control output: DC 0/12-24V, Max.30mA

02-01

Page 30

2-2 COMPRESSOR OPERATION

2-2-1 Operation / Stop Condition

When cooling requirement capacity or heating requirement capacity from either of the indoor units in the same refrigerant circuit is input, the compressor operates. When all the indoor units in no "cooling requirement capacity" or "heating requirement capacity", is stopped. But in the following case, the compressor operates in accordance with operation of each mode.

During 3 minute restart prevention operation Icing protection Failure (Refer to chapter 4, TROUBLE SHOOTING ) Oil recovery Under expansion valve initialization At protective operation

Emergency stop Defrost operation

Peak cut stop operation

the compressor

2-2-2 Capacity Control

(1) Capacity of compressor operation

By the operation of DC inverter rotary compressor, the amount of required refrigerant circulation acceding to cooling and heating load can be supplied from compressor efficiently.

DC inverter rotary compressor is able to control the amount of required refrigerant circulation in details.

Total capacity

Capacity of

compressor operation

Inverter Compressor

02-02

Cooling/Heating load

Page 31

(2) Target low-pressure and high-pressure control

<Cooling> In order to make the evaporation pressure of the indoor unit at the proper pressure on a variety of operations, capacity of the compressor will be controlled by low-pressure sensor of the outdoor unit.

<Heating> In order to make the condensation pressure of the indoor unit at the proper pressure on a variety of operations,

capacity of the compressor will be controlled by high-pressure sensor of the outdoor unit.

Target low-pressure and high pressure temperature depends on system capacity, capacity of compressor operation, pipe length, and capacity shift switch settings.

2-2-3 Speed Range of Start, Stop, And Operation

On stop mode : 0 rps

On operating mode : 20 - 100 rps

(1) Cooling starting process For cooling operation only, the upper limit speed at starting is made 50rps and is raised in +10rps increments every 60 seconds.

The compressor operates at the upper limit speed if the target speed is higher than the upper limit speed.

The compressor operates at the target speed if the target speed is lower than the upper limit speed.

Speed

90rps

Target speed 80rps 70rps 60rps 50rps

10rps

60sec

120sec 180sec 240sec

02-03

Time

Page 32

(2) Heating starting process

At the start of heating, the compressor is started by the following process. Compressor start-up to change the 4 way valve. Capacity control returns to normal control after the end of the starting process. (target high-pressure control)

< Starting process >

Compressor operation speed

Normal control

Starting process

Starting process Starting process

4rps/Min

32rps fixed

Cancel conditions

3 minutes elapsed from start of process or High-pressure 2.63MPa

20 minutes elapsed from start of process or High-pressure 2.63MPa or Discharge SH 10 and Discharge temperature 10

*However, when the following condition (A) or (B) are satisfied, starting process is not performed.

< Conditions under which starting process is not performed >

(A) The compressor temperature 32 , when the room temperature reached to the setting temperature ( Thermostat - OFF controlling )

(B) The compressor temperature 32 , when the system keeps heating mode with stop condition

< Operation >

Compressor operates based on the required capacity at the start up, after that the target high-pressure control begins.

(3) Limits the upper limit speed of the INV compressor according to the present high-pressure value.

High Pressure

Maximum speed = 80rps

3.60MPa

Maximum speed = 90rps

3.30MPa

Maximum speed = 95rps

(Maximum) 3.00MPa

[ a ]

Maximum speed = 100rps

[ a ] = 1.25 Low pressure value 2.125

02-04

Page 33

2-3 FAN CONTROL

2-3-1 Cooling Operation

Fan step

Fan speed (rpm)

AJ A36LALH AJ A45LALH AJ A54LALH

780 700 660 660 670 590 540 540 450 410 340 340 270 250 390 0 340 0 290 0 250 0 0 0

780 700 700 700 670 590 540 540 450 410 340 340 270 250 390 0 340 0 290 0 250 0 0 0

Step

Upper FAN Lower FAN

Switching conditions of step

The initial speed of the outdoor unit is detected by out door temperature sensor.

Outside air temperature sensor detected value

TAOUT 30°C

30°C TAOUT 20°C

20°C TAOUT 10°C

10°C TAOUT

Thereafter, the high-pressure is monitoring at a set time interval and the fan speed is changed by the following conditions.

(Conditions which lower the fan speed) High-pressure saturation low limit of target high-pressure

saturation range and heat sink temperature 75°C

Fan step

The fan is controlled to keep high puressure saturation temperature within the target range as follows

High-pressure saturation temperature

46.6

40.4

Upper limit of target high-pressure saturation temp.

Low limit of target high-pressure saturation temp.

35 52

Target high-pressure saturation temp.

Outdoor temperature

(Conditions which raise the fan speed) High-pressure saturation upper limit of target high-pressure saturation or heat sink temperature 80°C

02-05

Page 34

2-3-2 Heating Operation

Fan step

Fan speed (rpm)

AJ A36LALH AJ A45LALH AJ A54LALH

800 700 660 660 670 590 540 540 450 410 340 340 270 250 0 0 0 0 0 0 0 0 0 0

800 700 700 700 670 590 540 540 450 410 340 340 270 250 0 0 0 0 0 0 0 0 0 0

Switching conditions of step

The initial speed of the first boot outdoor unit is detected by outdoor air temperature sensor value (TAOUT).

Outside air temperature sensor detected value

TAOUT 10°C

10°C TAOUT 15°C

15°C TAOUT 20°C

20°C TAOUT

Thereafter, the high-pressure is monitoring at a set time interval and the fan speed is changed by the following conditions.

(Condition which lowers the fan speed)

High-pressure 3.30MPa and heat sink temperature 80°C

(Condition which raises the fan speed) High-pressure saturation 3.20MPa or heat sink temperature 85°C

Fan step

02-06

Page 35

2-3-3

Low noise mode

When the low noise mode setting ON from PUSH SW or EXTERNAL INPUT, the outdoor unit operates in the low noise mode as follows.

Settings and corresponding operations

Capacity priority setting

( PUSH SW ) ( PUSH SW )

Low noise level setting

Operation mode

OFF

Low noise mode and operation contents

COOL

Low Noise Mode

HEAT

Max Compressor Speed

Max FAN Step

Upper FAN Lower FAN

Max FAN Step

Upper FAN Lower FAN

LOW NOISE MODE

* Automatic switching

4HP

AJ*A36LALH

AJ*A45LALH

450 410

5HP

AJ*A54LALH

450 410

6HP

450 410

The operating noise is reduced by limiting the rotational speed of the compressor and fan motor

LOW NOISE MODE

The operating sound lowers from about 3 to 5 dB more than the rated value

* Automatic switching

Operation in low noise mode

Low capacity

Normal operation

Not switched for 30 minutes after being once switched.

Capacity does not become low even when switched to low noise mode

* Low capacity Compressor capacity is low or High-pressure is high (high-pressure saturation 58°C) at cooling or Low-pressure is low (low-pressure saturation 0°C) at heating

02-07

Page 36

2-3-4 Other Control

To accurately detect the outside air temperature, the fan is operated while the outdoor unit is stopped.

2-4 EXPANSION VALVE CONTROL

Control range

Initialization conditions

Operation mode

operation stop

Cooling

EEV 1

EEV 2

< Cooling mode > 500 pulses basically.

< Heating mode > EEV is controlled so that the system reaches closer to the target discharge temperature that is calculated from high and low pressure.

When power turned on When operation stopped

Heating

Cooling

Heating

500 pulses

0 pulses

40 - 500 pulses

55 - 500 pulses 0 pulses

02-08

Page 37

2-5 SPECIAL OPERATION

2-5-1 Oil Recovery Operation

Purpose of the operation

The amount of refrigerant lubricant oil which has been transported to the indoor units and the connection pipe with the refrigerant will become large as the operation time of compressor increases. It is necessary to recover the oil back into the outdoor unit for a certain time interval in order to prevent compressors from damaging due to lack of lubrication oil.

1. Oil Recovery in Cooling operation

< Start condition >

Compressor accumulated operation time since last cooling oil recovery operation exceeds 3 hours (first time : 1hour)

< End condition > 30 seconds have elapsed since the start and "suction temperature - low pressure saturation temperature 5deg" or 6 minutes

have elapsed since the start.

< Operation >

COMPRESSOR: The rotation speed varies depending on the operation state. EEV Opening (Indoor/Outdoor unit): Controlled pulse (as normal operation mode). FAN speed (Indoor/Outdoor unit) : Controlled fan speed (as normal operation mode).

2. Oil Recovery in Heating operation

< Start condition >

Compressor accumulated operation time since the last heating oil recovery exceeds 8 hours (first time : 1hour)

< End condition > After 4 minutes have elapsed

< Operation >

COMPRESSOR: The rotation speed varies depending on the operation state. EEV Opening (Indoor/Outdoor unit) : Controlled pulse (as normal operation mode) FAN speed (Indoor/Outdoor unit) : Controlled fan speed (as normal operation mode)

Others

During the oil recovery operation, appears on the display of wired and central remote controller, and appears on the simple remote controller. The operation indicators (LED) of the indoor units flash slowly.

02-09

Page 38

2-5-2 Pre-heat Operation

This pre-heat operation protects the start up failure by preventing the refrigerant from soaking into the oil in compressor.

Crankcase heater ON: 30 minutes elapsed since installed compressors stopped

*It doesn't control according to the temperature.

OFF: Compressor starts

(However, ON when power turned on)

2-5-3 Defrost Operation Control

Defrost Operation Start Condition 1

Outdoor temperature <2 and Compressor stop count exceed 20 times at less than 10 minutes of accumulated heating operation time

Defrost Operation Start Condition 2

Accumulated heating operation time is 40 minutes or longer [Accumulated heating operation time is reset at the end of cooling operation or defrosting operation.] and an outdoor unit satisfies condition or below

Condition : "Heat exchange temperature -2°C" accumulated operating time is 180 minutes or longer

Condition : After the following all condition satisfied, "heat exchange temperature defrosting start judgment temperature and during heat exchange liquid temperature drop" accumulated time:10minutes

(a) accumulated heating operation time 30 minutes (b) 10 minutes have elapsed after outdoor unit starting (c) 5 minutes have elapsed since oil recovery

* Defrosting start and end judgment temperature are determined by the outdoor temperature.

Defrosting start judgment temperature = 0.8 x outdoor temperature - 11.6 (However, -27.6°C to - 6°C)

If the calculated result is lower than -27.6 , the judgment temperature is defined as -27.6 If the calculated result is higher than -6 , the judgment temperature is defined as -6

Defrost Operation End Condition

At all outdoor units, heat exchange liquid temperature end judgment temperature or when 10 minutes have elapsed from the start (When the indoor unit connection capacity is 90% or less, after 15 minutes have elapsed.)

Defrosting end judgment temperature = 0.39 x outdoor temperature + 12.7 (However, 5 to 12°C range)

If the calculated result is lower than 5 , the judgment temperature is defined as 5 If the calculated result is higher than 12 , the judgment temperature is defined as 12

02-10

Page 39

2-6 PROTECTIVE FUNCTION

2-6-1 Protective Function List

Protective Function

Discharge Temp Protection 1

Discharge Temp Protection 2

Discharge Temp Protection 4

Discharge Temp Protection 5

Discharge Temp Protection Stop

Detect Parts

Discharge Temp Thermistor

COOL HEAT

DISPLAY

EA11

Operating Condition

<Starting conditions> 3 minutes have elapsed since the start of operation and (discharge temperature 100°C or suction SH 10°C accumulated time 30 minutes)

<Reset conditions> Discharge temperature 95°C and suctionSH 7°C

<Starting conditions> Cooling: Discharge temperature 95°C Heating: Discharge temperature 102°C

< starting condition> Discharge temperature 105°C

<Starting conditions> Discharge temperature 95°C and EEV1=500pls

<Reset conditions> 2 minutes have elapsed and (discharge temperature 90°C or EEV1 400pls)

<Pattern starting condition> Discharge temperature fixed value (115°C)

<Pattern reset condition> 3 minutes have elapsed and discharge temperature 80°C

<Pattern starting condition> Pattern generated 2 times within 40 minutes

<Pattern reset condition> Error reset (push button SW) executed after power turned on again

<Reset conditions> Discharge temperature 90°C Discharge temperature 97°C

<Pattern reset condition> Discharge temperature 100°C

Operation

EEV of operating indoor unit gradually opened

EEV2 + 30pls/30 secs

Compressor speed -6rps every 30 secs Speed rise prohibited, when discharge temperature becomes lower than 105 , prohibit the rotational speed rise of the compressor.

Expansion valve of stopped indoor unit gradually opened (upper limit 200pls)

Compressor stopped

Compressor stopped (permanent stop) Error display

High Pressure Protection 1

High Pressure Protection 2

High Pressure Protection 3

High Pressure Protection 4

High Pressure Protection 5

Abnormal High Pressure Protection Control

High Pressure Sensor

<Starting conditions> COMP < 25 rps ---- HP 3.3 MPa 25 rps COMP < 30 rps ---- HP 3.5 MPa 30 rps COMP

<Reset conditions> Fixed time has elapsed and Fixed time when SV2: ON 30 secs COMP < 25 rps ---- HP 3.0 MPa 25 rps COMP < 30 rps ---- HP 3.2 MPa 30 rps COMP

<Starting conditions> COMP 25 rps ---- HP 3.5 MPa COMP < 25 rps ---- HP 3.3 MPa

<Reset conditions> 3 minutes have elapsed and high-pressure 2.80MPa

<Starting conditions> Fixed time has elapsed and high-pressure 3.50MPa (* Fixed time at start of operation: 10 secs, after operation execution: 20 secs)

<Reset conditions> Operation (fan speed 1 step increase) complete

<Pattern starting condition> High-pressure 3.30MPa

<Pattern starting condition> High-pressure 3.50MPa

<Starting conditions> High-pressure 3.20MPa

<Pattern starting condition> COMP < 30 rps ---- HP 3.18 MPa COMP 30 rps ---- HP 3.68 MPa

<Pattern reset condition> After 25 seconds have elapsed and, COMP < 30 rps ---- HP 3.1 MPa COMP 30 rps ---- HP 3.6 MPa

<Pattern starting condition> COMP 30 rps ---- HP 3.3 MPa COMP 30 rps ---- HP 3.8 MPa

<Pattern reset condition> After 25 seconds have elapsed and, COMP 30 rps ---- HP 3.18 MPa COMP 30 rps ---- HP 3.68 MPa

---- HP 3.8 MPa

---- HP 3.5 MPa

<Pattern reset condition> High-pressure 3.2MPa

<Pattern reset condition> High-pressure 3.5MPa

<Reset conditions> High-pressure 3.20MPa

SV2 ON

Fan speed 1 step increase

Fan speed lowered/every 30 secs

Fan lowest speed Upper 270 rpm Lower 250 rpm

Compressor capacity lowered/every 15 secs

Compressor capacity rise prohibited

Compressor capacity lowered every 30 secs

02-11

Page 40

Protective Function

High Pressure Protection Stop 1

High Pressure Protection Stop 2

Low Pressure Protection 1

Detect Parts

High Pressure Sensor

Pressure Switch

Low Pressure Sensor

COOL HEAT

DISPLAY

EA41

EA42

Operating Condition

<Pattern starting condition> High-pressure 4.00MPa

<Pattern reset condition> 5 minutes have elapsed and high-pressure 3.50MPa

<Pattern starting condition> Pattern generated 3 times within 60 minutes.

<Pattern reset condition> 10 minutes have elapsed and high-pressure 3.50MPa

<Pattern starting condition> Pressure SW operated (Operated by high-pressure 4.20MPa)

<Pattern reset condition> 5 minutes have elapsed and pressure SW operation reset (Reset by high-pressure 3.2MPa)

<Pattern starting condition> Pattern generated 3 times within 60 minutes.

<Pattern reset condition> 10 minutes have elapsed and pressure SW operation reset (Reset by high-pressure 3.2MPa)

<Starting conditions> Low-pressure 0.20MPa

<Reset conditions> 5 minutes have elapsed and low-pressure 0.30MPa

Compressor stopped

Compressor stopped Error display

SV2 ON

Operation

Low Pressure Protection 2

Low Pressure Protection 4

Abnormal Low Pressure Protection Control

Low Pressure Protection Stop

Compressor Temp Protection Stop

Low Pressure Sensor

Compressor Temp Thermistor

EA51

<Starting conditions> Low-pressure 0.10MPa

<Reset conditions> 3 minutes have elapsed and low-pressure 0.17MPa

<Starting conditions> 3 minutes have elapsed and low-pressure 0.18MPa

<Reset conditions> 3 minutes have elapsed and low-pressure 0.22MPa

<starting condition> Low-pressure 0.16MPa

<Pattern starting condition> Low-pressure 0.05MPa or low-pressure 0.10MPa continues for 10 mins

<Pattern reset condition> 3 minutes have elapsed and low-pressure 0.17MPa

<Pattern starting condition> Pattern generated 5 times within 180 minutes.

<Pattern reset condition> Error reset (push button SW) executed after power turned on again.

<Pattern starting condition> Compressor temperature fixed value (110°C)

<Pattern reset condition> 3 minutes have elapsed and discharge temperature 80°C

<reset condition> 3 minutes have elapsed and low-pressure 0.18MPa

SV2 ON

EEV of stopped indoor unit opened quickly (450pls)

Compressor capacity lowered every 180 secs,

when the Low-pressure becomes more than

0.17MPa, prohibit compressor capacity rise.

Compressor stopped

Compressor stopped (permanent stop) Error display

Compressor stopped

EA31

<Pattern starting condition> Pattern generated 2 times within 40 minutes

<Pattern reset condition> Error reset (push button SW) executed after power turned on again

02-12

Compressor stopped (permanent stop) Error display

Page 41

Protective Function

Overcurrent Break Stop (Compressor)

Detect Parts

Overcurrent Protection Circuit

COOL HEAT

DISPLAY

E941

(permanent stop)

Operating Condition

Compressor is stopped when the over currernt protectioncircuit in the inverter PCBoad detects an abnormal current duringthe operation. If it repeated 5 times, the compressor becomes permanentstop.

Operation

Compressor stopped

Heatsink Temp Protection Stop

Frequency Maximum Setting Protection (Compressor)

Heatsink Temp Thermistor

Current Detector Circuit

E931

(permanent stop)

EAC4

Compressor is stopped when the over current protection circuit in the inverter PC Board detects an abnormal current at the time of start up. Compressor becomes permanent stop if it repeated over the number of set time.

<Reset condition> Error reset (push button SW) executed after power turned on again.

<Pattern starting condition> Heat sink temperature 100°C

<Pattern reset condition> 3 minutes have elapsed and heat sink temperature 85°C

<Pattern starting condition> Pattern generated 3 times within 60 minutes.

<Pattern reset condition> 10 minutes have elapsed and heat sink temperature 85°C

<Pattern starting condition> Current value Cooling: 22.5A / Heating: 23.5A

<Pattern reset condition> Current value Cooling: 22.5A / Heating: 23.5A

<Pattern starting condition> Current value Cooling: 23.0A / Heating: 24.0A

<Pattern reset condition> Current value Cooling: 23.0A / Heating: 24.0A

• Pattern and start current value changed by outside temperature

Compressor stopped

Compressor stopped Error display

Compressor speed rise prohibited

Compressor speed lowered

02-13

Page 42

Page 43

3. INDOOR UNIT OPERATION

Page 44

Page 45

3. INDOOR UNIT OPERATION

3-1 FAN CONTROL

3-1-1 Fan Speed Setting

Fan speed setting

Press the FAN CONTROL button to set the fan speed.

AUTO

HIGH MED LOW

3-1-2 "AUTO" Position

1. COOLING OPERATION

The fan speed is determined automatically in accordance with the condition "(TR(corrected room temperature) - TS (corrected set temperature)" as shown on the right. However, the fan speed zone is determined in the manner as the room temperature increases for the following cases.

(1) When the TS is changed. (2) When the operation mode is changed from other mode to "COOL". (3) When the fan control is changed from other position to "AUTO".

2. HEAT OPERATION

Same as Cooling operation, fan speed is decided by the difference between the room temperature and the set temperature.

-2

Fan speed zone

TR-TS

When the room temperature decreases

Fan speed zone

-2

-3

When the room temperature decreases

Hi zone

Med zone

Low zone

Med zone

Hi zone

TR-TS

When the room temperature increases

TR-TS

-1

TR-TS

When the room temperature increases

TR-TS

-2

-1

-2

3. DRY OPERATION

The indoor fan always rotates at "Lo" speed.

• Expansion

• valve

• Indoor fan motor

(1) The indoor fan starts operation 5 seconds after the electric expansion valve opens. However, when the indoor unit just starts its operation or the operation mode is changed from other to "DRY" and the refrigerant circulation is not stopped, the fan will rotate immediately without a delay time of 5 seconds. (2) The indoor fan will stop in 30 seconds when the refrigerant circulation stops. (3) The indoor fan will stop immediately when the indoor unit is stopped by pushing the stop button or by a setting of ON timer. (4) When the refrigerant circulation is stopped due to a lower room temperature for more then 3 minutes, the fan will rotate 2 minutes at intervals of 3 minutes. (5) When the indoor unit just starts its operation or the operation mode is changed from other to "DRY" and the refrigerant circulation is stopped, the fan will rotate for 1 minute and then it will operate according to the statement (4).

OPEN CLOSE

ON OFF

30s

ON ON ON

30s

2min30s

2min

3min

TIME -->

03-01

Page 46

3-2 MASTER CONTROL

3-2-1 Operation Mode Control

Each operation mode is controlled as below. (1) Stop mode

Indoor fan motor : OFF Electric expansion valve Drain pump

(2) Cool, Dry and Heat Mode

Indoor fan motor

: Stop pulse : Turns ON-OFF by the drain pump control function

Cool Dry

Operates according to

the AIR FLOW-MODE

setting.

See the fan control

page.

Heat

Operates according to

the AIR FLOW-MODE

setting, and besides

cold air prevention

operation

Drain pump

Electrical expansion valve

(3) Priority mode

Turns ON-OFF by the drain pump control function

Pulse controlled by

the temperature differ-

ence calculation and

frost prevent fuction

Pulse controlled by

the temperature dif-

ference calculation

and frost prevent

function

Pulse controlled by

the temperature dif-

ference.

The purpose of the priority mode is to restrict operation commands (heating, cooling, dry) from the connected indoor units. There are 3 priority modes of Neutral, Cooling Priority, and Heating Priority. The operation modes restricted by each of these modes are as follows:

Priority mode

Neutral

Cooling priority

Heating priority

Restricted operation mode

No restrictions

Heating

Cooling, dry

1. Priority mode decision methods Method 1. (Default value) The initial priority mode is made Neutral and is shifted to Cooling Priority when cooling and to Heating Priority when heating depending on which operation mode (cooling, heating) was input first. After shifting to Cooling Priority or Heating Priority, the priority mode shifts to Neutral only when there was a Stop input from all the indoor units.

Neutral

Cooling priority

Heating priority

Method 2. (Management by outdoor unit) Operation mode management is made "Management by outdoor unit" by outdoor unit PUSH-SW (field setting). The priority mode shifts to Cooling Priority or Heating Priority in accordance with input from the outdoor unit regardless of the current mode.

Cooling priority

Heating priority

03-02

Page 47

Method 3. (Management by indoor unit) Operation mode management is made "Management by indoor unit" by outdoor unit PUSH-SW (field setting). Then the master indoor unit is set by wired remote controller. Thereupon the priority mode shifts to Cooling Priority or Heating Priority in accordance with input from the master indoor unit regardless of the current priority mode. The priority mode is fixed at either cooling or heating even if the master indoor unit stops Cooling/heating switching can be performed by the master indoor unit only.

Cooling priority

Heating priority

(4) Opposite operation mode When the operation mode commanded from an indoor unit (remote controller) and the operation mode allowed by the system (cooling and dry operation for cooling only type and operation mode allowed by priority mode for heat pump type) do not match, it is indicated by blinking of an LED.

Timer lamp: 3 secs ON/1 sec OFF repeated

03-03

Page 48

3-2-2 Auto Changeover

[Method]

1. Switch operation mode management to "Management by indoor unit" by outdoor unit DIP-SW.

2. Set the master indoor unit by wired remote controller.

3. Judge cooling/heating by the difference between the master indoor unit's setting temperature and the room temperature.

AUTO CHANGEOVER operation

Operation flow chart

START

Room temp.

Ts+2°C ?

YES

or operation command other than

Room temp.

Ts- 2°C ?

HEATING OPERATION

Thermostat remains

in OFF state for 6 minutes or

longer?

System stops

auto changeover operation?

YES

TS : Setting temperature

in OFF state for 6 minutes or

or operation command other than

auto changeover operation?

COOLING OPERATION

Thermostat remains

longer?

System stops

YES

03-04

Page 49

3-2-3 "COOL" Position

When using the cooling mode, set the temperature to a value lower than the current room temperature, otherwise

the indoor unit will not start the cooling operation and only the fan will rotate.

An example for COOLING TEMPERATURE CONTROL time chart (Manual setting)

• Temperature

• Refrigerant flow

• Opening of EEV

• Indoor fan

Ts + 0.5 C

Ts - 0.5 C

3Min.

ON OFF

100% 0%

ON OFF

Ts : Corrected setting temperature

TR : Corrected room temperature

Ts + 0.5 C Ts - 0.5 C

: The thres hold temperature of start of refrigrant flow

: The thres hold temperature of stop of refrigrant flow

3-2-4 "HEAT" Position

(1) When using the heating mode, set the temperature to a value higher than the current room temperature, otherwise

the indoor unit will not start the heating operation.

(2) After the start of heating operation, the fan of indoor unit will not rotate until the heater exchange is warmed up to blow out warm air.

During defrosting, the OPERATION indicator lamp flashes 6 sec. ON and 2 sec. OFF, and repeat. The heating operation

(3)

will be temporarily interrupted.

An example for HEATING TEMPERATURE CONTROL time chart (Manual setting)

Ts + 0.5 C

• Temperature

• Refrigerant flow

• Opening of EEV

• Indoor fan

Ts - 0.5 C

ON OFF

100% 0%

ON OFF

1Min.

4Min.

Ts : Corrected setting temperature TR : Corrected room temperature

: Duration of cold air prevention

4Min.

1Min.

Ts + 0.5 C Ts - 0.5 C

: The thres hold temperature of start of refrigrant flow

: The thres hold temperature of stop of refrigrant flow

4Min.

1Min.

03-05

Page 50

3-3 LOUVER CONTROL

(1) ADJUSTING THE DIRECTION OF AIR CIRCULATION

Instructions relating to heating ( ) are applicable only to heat pump type outdoor unit.

Begin air conditioner operation before performing this procedure.

Vertical Air Direction Adjustment

This instructions are applicable to "LARGE CEILING TYPE", "UNIVERSAL FLOOR/CEILING TYPE", "CASSETTE TYPE", "WALL MOUNTED TYPE" and "COMPACT WALL MOUNTED TYPE".

Press the VERTICAL AIR FLOW DIRECTION SET button.

Example : When set to vertical air direction.

Press the VERTICAL AIRFLOW DIRECTION button. The temperature display will change to the vertical airflow direction setting display.

Press the VERTICAL AIRFLOW DIRECTION button to change the vertical louvre position. The position number will appear on the display.

Cooling & Dry : 1 , 2 , 3 , 4

Heating : 1 , 2 , 3 , 4

LARGE CEILING TYPE

COMPACT WALL MOUNTED TYPE

UNIVERSAL FLOOR/CEILING TYPE

DANGER!

Never place fingers or foreign objects inside the outlet ports, since the internal fan opertes at high speed and could cause personal injury.

CASSETTE TYPE

WALL MOUNTED TYPE

Always use the remote control umit's AIR FLOW DIRECTION button to adjust the UP/DOWN air direction flaps or

RIGHT/LEFT air direction louvers. Attempting to move them manually could result in improper operation; in this case, stop operation and restart. The louvers should begin to operate

properly again. When used in a room with infants, children, elderly or sick persons, the air direction and room temperature should be considered carefully when making settings.

Use the air direction adjustments within the ranges shown above.

The vertical airflow direction is set automatically as shown, in accordance with the type of operation selected.

During Cooling mode : Horizontal flow During Heating mode : Downward flow

During AUTO mode operation, for the first minute after beginning operation, airflow will be horizontal ,

the air direction cannot be adjusted during this period.

03-06

Page 51

Horizontal Air Direction Adjustment

This instructions are applicable to "LARGE CEILING TYPE", "UNIVERSAL FLOOR/CEILING TYPE" and "WALL MOUNTED TYPE".

Press the HORIZONTAL AIR FLOW DIRECTION SET button.

Press the HORIZONTAL AIRFLOW DIRECTION button. The temperature display will change to the horizontal airflow direction setting display.

Press the HORIZONTAL AIRFLOW DIRECTION button to change the horizontal louvre position. The position number will appear on the display.

Cooling & Dry : 1 , 2 , 3 , 4 , 5

Heating : 1 , 2 , 3 , 4 , 5

Example : When set to horizontal air direction.

LARGE CEILING TYPE

WALL MOUNTED TYPE

UNIVERSAL FLOOR/CEILING TYPE

(2) SWING OPERATION

Instructions are applicable to "LARGE CEILING TYPE", "UNIVERSAL FLOOR / CEILING TYPE", "CASSETTE TYPE", "WALL MOUNTED TYPE" and "COMPACT WALL MOUNTED TYPE".

Begin air conditioner operation before performing this procedure.

To select Vertical airflow SWING Operation

This instructions are applicable to "LARGE CEILING TYPE", "UNIVERSAL FLOOR/CEILING TYPE", "CASSETTE TYPE", "WALL MOUNTED TYPE" and "COMPACT WALL MOUNTED TYPE".

Press the VERTICAL SWING button for more than two seconds.

The remote controller's Vertical Swing Display will light up. In this mode, the UP/DOWN air direction flaps will swing automatically to direct the air flow both up and down.

Example : When set to vertical swing.

To Stop Vertical airflow SWING Operation

Press the VERTICAL SWING button for more than two seconds once and again.

The remote controller's Vertical Swing Display will go out. Airflow direction will return to the setting before swing was begun.

03-07

Page 52

Instructions are applicable to "LARGE CEILING TYPE", "UNIVERSAL FLOOR / CEILING TYPE", "CASSETTE TYPE", "WALL MOUNTED TYPE", and "COMPACT WALL MOUNTED TYPE".

About Vertical Airflow SWING Operation

The SWING operation may stop temporarily when the air conditioner's fan is not operating, or when operating at very low speeds.

The swing operation is not available depending on the model. Please refer to the operating manual for the indoor unit.

To select Horizontal Airflow SWING Operation

This instructions are applicable to "LARGE CEILING TYPE", "UNIVERSAL FLOOR / CEILING TYPE", "WALL MOUNTED TYPE".

Press the HORIZONTAL SWING button for more than two seconds.

The remote controller's Horizontal Swing Display will light up. In this mode, the RIGHT/LEFT air direction louvers will swing automatically to direct the airflow both right and left.

Air swing range

Air flow direction set

1 2 3 4

Range of swing

1 to 4 (All range)

Example : When set to horizontal swing.

To stop Horizontal airflow SWING Operation

Press the HORIZONTAL SWING button for more than two seconds once and again.

The remote controller's Horizontal Swing Display will go out. Airflow direction will return to the setting before swing was begun.

About Horizontal Airflow Swing Operation

Left and right swing range can be changed in 3 steps by field setting.

The SWING operation may stop temporarily when the air conditioner's fan is not operating, or when operating at very low speeds.

The swing operation is not available depending on the model. Please refer to the operating manual for the indoor unit.

Left and right swing range

Range of swing

1 to 5 (All range)

1 to 3 3 to 5

Function Number

( Factory setting)

Setting Value

00 01 02

03-08

Page 53

3-4 ELECTRONIC EXPANSION VALVE CONTROL

1. Initialization

When the power is turned ON. When it has passed the limited time since the last initialization.

2. Operation Control

When indoor unit stopping

Outdoor unit Condition

OFF

Cooling

Heating

When starting up

(Cooling) Move to the cooling control base pulse in steps. (Heating) Move to the heating control base pulse in steps.

Automatic operatic control

Automatic PI control is performed based on the indoor unit heat exchanger outlet temp and inlet temp.

Room temperature control

The room temperature is controlled so that it reaches to the set-up temperature based on the difference between the room temperature and the set-up temperature, and the change of indoor unit temperature. if the room temperature becomes 0.5 C lower than the set-up temperature, EEV is fully closed.

EEV Condition

Fully closed

Slightly open

3. Special Control

Oil recovery operation : Controlled pulse. Test run operation : Controlled pulse. Icing protection control : Fully closed. Pump down operation : Fully open. Defrost operation : Controlled pulse

3-5 DRAIN PUMP OPERATION

(1) When cooling and refrigerant circulation starts, the drain pump starts simultaneously. (2) The drain pump operates continuously for 3 minutes after the refrigerant circulation stopped. (3) When the refrigent circulation is stopped by a start of indoor heat exchanger frost prevention operation, the drain pump will turn off in 1 hour after the end of indoor heat exchanger frost prevention operation. (4) When the water level in the drain pan rises up and then the float switch functions:

Microcomputer stops the refrigerant circulation and indoor fan motor operation.

Drain pump operates continuously for 3 minutes after the float switch is turned off.

(Almost condensing water may be drained) (5) When the float switch turns ON continuously for 3 minutes, 'FAILURE INDICATION' operates. (6) When the float switch turns OFF within 3 minutes, the unit starts cooling operation.

03-09

Page 54

3-6 FUNCTION

3-6-1 Auto Restart

The air conditioner restarts with the previous setting operation.

3-6-2 Icing Protection Control

The icing of the indoor heat exchanger is prevented during the cooling and dry mode operation.

(1) Starting Condition Compressor is operation more than 3 minutes. When "Heat exchanger inlet temperature TA" continues *4 minutes or more. Compressor is operation more than 3 minutes. When "Heat exchanger outlet temperature TA" continues 4 minutes or more.

(2) Operation EEV is closed. Fan is at the setting amount.

(3) Completing Condition Heat exchanger inlet and middle temperature TB After more than 5 minutes

Drain pump turns off at 60 minutes past the completion of the icing protection operation.

1°C

7°C

3-6-3 Oil Recovery Operation

[Oil recovery operation] : It periodically returns the residual refrigerant ion oil in the indoor unit and the connection piping back to the outdoor unit , and prevents the compressor oil level from decreasing.

Indoor unit LED : Operation LED

6 sec ON 2 sec OFF Blinking

Indoor fan : Same operation before oil recovery operation.

Indoor EEV : Control pulse

During the above operation, a refrigerant noise may be from the indoor unit.

03-10

Page 55

3-7 TIMER CONTROL

3-7-1 Wireless Remote Controller

UTY - LNH

There are following 4 kinds of timer modes are available.

ON Timer OFF Timer PROGRAM Timer SLEEP Timer

1. ON / OFF TIMER

The timer functions cannot be used when this controller is used together with the remote controller (Wired type). A beeping sound is made when a signal is received.

To set the ON / OFF timer

Press the START/ STOP button to start the air conditioner, and then proceed as follows.

Press the TIMER MODE button to select

2. PROGRAM TIMER

To set the PROGRAM timer

Press the START/ STOP button to start the air conditioner, and then proceed as follows.

"OFF TIMER" or "ON TIMER"

CANCEL OFF TIMER ON TIMER

PROGRAM TIMER (OFF ON, OFF ON)

Select "OFF TIMER" Adjust the OFF time. Select "ON TIMER"

Adjust the OFF or ON time.

(About 5 seconds later, the entire display will reappear.)

Adjust the ON time.

(About 5 seconds later, the entire display.

4 5

will reappear.)

To cancel the TIMER

Select "CANCEL".

The air conditioner will return to normal operation.

*To change operating conditions

If you wish to change the operating conditions (ON/OFF,Mode, Fan Speed, Temperature Setting), after making the time setting, wait until the entire display reappears, then press the appropriate buttons to change to the desired operating condition.

Select "PROGRAM TIMER"

(Either OFF ON or OFF ON will display.) (If the ON timer has been se lected to operate first, the unit will stop operating at this point.)

* Even ON/OFF and Sleep timer are valid.

3. SLEEP TIMER

To set the SLEEP timer

Unlike other timer functions, the SLEEP timer is designed to set the duration of time in which the unit does not operate. The SLEEP timer can be set regardless of whether the indoor unit is operating or stopped.

(Both the indoor unit's OPERATION indi-

To change the timer settings

cator lamp (green) and the TIMER indi cator lamp (orange) will light.)

1 2

Press the SLEEP button once again.

Set the time using the TIMER SET buttons.

*To cancel the TIMER

Select "CANCEL".

The air conditioner will return to normal operation.

Adjust the OFF time.

(About 5 seconds later,the entire display will reappear.)

*To stop air conditioner operation during timer operating

03-11

* Even ON/OFF and Program timer are valid.

Page 56

Sleep timer

The sleep timer function automatically corrects the temperature thermostat setting according to the time setting to prevent excessive cooling and heating while sieeping.

Cooling operation / dry operation Heating operation

When the sleep timer is set, the set temperature automatically rises 1°C every hour.The set temperature can rise up to a maximum of 2°C

When the sleep timer is set, the set temperature sutomatically drops 1°C every 30 minutes. The set temperature can drop to a maximum of 4°C

60min.

Timer setting

1°C

2°C

30min.

60min.

1 C

2 C

90min.

Timer setting

3 C

4 C

03-12

Page 57

3-7-2 Group Remote Controller

UTY - CGG

WEEKLY TIMER

Different schedules can be set for each day of the week.

Four timers can be set for each day

1. WEEKLY TIMER

The timer function is not available depending on the initial setting.

Different schedules can be set for each day of the week. Four timers can be set for each day. Operation on/off time, operation mode, and temperature can be specified for each timer.

To start / cancel the WEEKLY timer operation

The timer does not start if the time is not set.

Press the ALL TIMER button to start or cancel the WEEKLY timers for all indoor units.

If any of the indoor units are in the timer mode, pressing this button cancels the timers for all indoor units. If none of the indoor units are in the timer mode, pressing this button starts the timers for all indoor units.

Press the Select button to select the indoor unit.

Press the Timer Mode (DELETE) button to start or cancel the WEEKLY timers.

Note: When a time is not set, the weekly timer cannot be started.

To set the WEEKLY timer

Press the PROGRAM (CLOCK ADJUST) button.

Press the DAY button to select the day of the week.

* For ALL, all of the days can be set together when a appears around each day.



* Do not press this button for two sec onds or more, otherwise you will en ter the time setting mode.

Day of the week setting



Timer setting

Decrement Increment

Press the Select button to select the indoor unit.

* If all indoor units are selected, the times for all of the registered indoor unit timers are set at once.

ALL

Press the Set Time buttons to set the time in 10-minute increments. * Hold down a Set Time button to adjust the time quickly.

S M T W T F S

SUN MON TUE WED THU FRI SAT

All indoor units

* The time already set at another timer is skipped at the relevant indoor unit.

03-13

Page 58

Operating setting

Press the Start/Stop button or the Mode button or the Set Temperature button to set the operation.

* For the operations that can be set, refer to "Operation mode setting", "Room tem perature setting", and "To start /stop operation" , in "OPERATION". * Only the current operation settings are displayed.

Raise

Lower

Setting the next timer for the same day:

ex.TIMER-1 will start operation at 8:00 on COOL.

TIMER-1 TIMER-2 TIMER-3 TIMER-4

Then press the ENTER button to proceed to the time setting, and repeat steps from to .

Repeat steps to to set the timer for another day of the week.

Be careful for pressing the ENTER button without any operation setting because the time that is set will be cancelled.

Setting the timer for the other indoor units:

3 5

Before setting the timer for other indoor units, press the ENTER button to confirm the settings. * The display switches to the next timer.

Repeat steps to to set the timer for other indoor units.

2 6

4 5

1. Press the ENTER button to confirm the set timer.

2. Press again the PROGRAM (CLOCK ADJUST) button to complete the weekly timer setting.

* flashes for two seconds.

To delete the operating time

NOTES

(1) The WEEKLY timer does not operate when the HEAT timer is set if a HEAT PUMP MODEL in the air conditioning system is operating in the cooling mode. In addition, the WEEKLY timer does not operate when the COOL or DRY timer is set if a HEAT PUMP MODEL in the air conditioning system is operating in the heating mode. (2) Even if the timer operation is set, the timer lamp of the indoor unit does not light up. (The timer lamp is used for wireless remote controller only.) (3) If the same time is set in Timer-1 to Timer-4 of an indoor unit, the timer setting of the smallest number will be effective.



1. If the Timer Mode (DELETE) button is pressed during steps to , the operat ing time for the selected day will be deleted. * If all the days are selected, the operating times for all of the days of the se lected timer will be deleted.

2. Press the ENTER button to confirm the deletion.

When the operating time is set, the mark appears.



ex. TIMER-1 will start operation at 8:00 on COOL with a set ting of 20 C

3 7

03-14

Page 59

3-7-3 Wired Remote Controller

UTY - RNK

ON / OFF TIMER WEEKLY TIMER TEMPERATURE SET BACK TIMER

1. ON / OFF TIMER

The timer function is not available depending on the model.

To set the ON/OFF timer

No display

NON STOP

To cancel

Press the timer mode button to select the ON timer or OFF timer.

It is switched every time as shown in the below diagram when the button is pressed.

OFF TIMER

Press the DELETE button to cancel the timer mode. The timer mode can also be canceled by changing the timer mode using the timer mode button.

ON TIMER

WEEKLY TIMER

SUMOTUWETH FR

From 1 to 24 hours

Press the set time buttons to set the time. After the time is set, the timer will start automatically. The amount of time until the OFF timer operates that is displayed on the timer display decreases as time passes.

ex. OFF timer set for 6 hours

03-15

Page 60

2. WEEKLY TIMER

The timer function is not available depending on the model.

Weekly timer setting

Press the timer mode button to select the weekly timer.

Day of the week setting

Press the DAY button to select the day of the week, and then press the TIMER SET button to confirm the setting.

For ALL, all of the days can be set together when a each day.

Time setting (ON / OFF timer)

SUMOTUWETH FR

369

ALL SU MO TU WE TH FR SA

12 15 18 21

appears around

Press the SET button for 2 seconds or more.

SUMOTUWETH FR

369

When the operating time is set, the

mark appears.

12 15 18 21

ON-1 OFF-1 ON-2 OFF-2

ex. The timer is set for 7:00-18:00.

Press the SET TIME buttons to set the ON time in 30-minute increments, then press the TIMER SET button to proceed to the OFF time setting. Set the OFF time in the same way. If necessary, set the second weekly timer settings in the same way.

Time setting (Independent OFF timer)

Switching from ON/OFF timer to independent OFF timer

The independent timer will flash on the display.

ON-2 OFF-2 OFF-2 OFF-3

Press the TIMER MODE button to change to the independent OFF timer setting. * The time setting process is the same as the ON/OFF timer. Press the TIMER MODE button to return to the ON/OFF timer setting.

To delete the operating time

Repeat steps and to set the weekly timer for another day of the week.

3 4

Press the TIMER SET button for 2 seconds or more to complete the weekly timer settings.

03-16

If the TIMER DELETE button is pressed during steps or , the operating time for the selected day will be deleted. If all the days are selected, the operating times for all of the days will be deleted.

Page 61

To start /cancel the WEEKLY timer operation

To start

The independent timer will flash on the display.

369

ex.Operating time 7:00-18:00 Indpnd. OFF time 21:00

When the weekly timer is selected, the timer starts automatically.

The operating time for the current day is displayed.

NOTES

(1) PRECAUTIONS DURING WEEKLY TIMER SETUP Setup is not possible in the following cases, so amend the time. Be sure to set the ON time first, then the OFF time. If either the ON time or the OFF time is not set cor rectly, the timer will not operate properly. The WEEKLY 2 settings cannot be set earlier than the WEEKLY 1 settings. The WEEKLY 1 and WEEKLY 2 time spans cannot overlap.

To cancel

12 15 18 21

(2) The earliest OFF time you can set is 30 minutes after the ON time. (3) The OFF time can be carried over to the next day. (4) The earliest independent OFF time you can set is 30 min utes after the last OFF time. (5) An independent OFF time can be set up to 0:00 hours of the next day. (6) Even if the timer operation is set, the timer indicator lamp of the indoor unit does not light up. (The timer indicator lamp is used for wireless remote controllers only.)

Press the TIMER DELETE button to cancel the timer mode. The timer mode can also be canceled by changing the timer mode using the TIMER MODE button.

To set the DAY OFF (for a holiday)

During the weekly timer, press the TIMER SET button for 2 seconds or more to set the day.

SUMOTUWETH FR

2 3 4

Select the day to set the DAY OFF.

SUMOTUWETH FR

Press the DAY (DAY OFF) button for 2 seconds or more to set the DAY OFF.

Flashing mark: indicates the DAY OFF.

Press the TIMER SET button for 2 seconds or more to complete the DAY OFF setting.

To cancel

369

12 15 18 21

ex. The DAY OFF is set for Monday.

369

12 15 18 21

Follow the same procedures as those for setup.

NOTES

The DAY OFF setting is only available for days for which weekly settings already exist. If the operating time carries over to the next day (during a next day setting), the effective DAY OFF range will be set as shown below.

Normal Next day setting

DAY OFF

ON OFF ON OFF

WEEKLY WEEKLY

Setting dayPreceding day Next day Setting dayPreceding day Next day

The DAY OFF setting can only be set one time. The DAY OFF setting is cancelled automatically after the set day has passed.

WEEKLY

03-17

OFF

WEEKLY

OFF

Page 62

3. TEMPERATURE SET BACK TIMER

The timer function is not available depending on the model.

Temperature SET BACK timer setting

SET BACK

SUMOTUWETH FR

369

Press the SET BACK button to change to the SET BACK confirmation display. The SET BACK operating time and the set temperature will be displayed.

Day setting Operating time setting

Follow step and in "To set the WEEKLY timer". The DELETE button is also used as described in the procedures for the weekly timer.

3 4

Temperature setting

12 15 18 21

Press the set temperature buttons to set the temperature. (The temperature setting range is the same as the range for the operation mode.)

SUMOTUWETH FR

If there is no existing SET BACK temperature setting, " - - " will be displayed for the temperature.

Press the SET button for 2 seconds or more.

SUMOTUWETH FR

369

ex. When setting all days together

12 15 18 21

369

12 15 18 21

ex. Operating time 15:00 - 22:00

ON OFF

SET BACK temperature

Normal temperature

To start /cancel the temperature SET BACK timer operation

To start

SET BACK

24°C

SUMOTUWETH FR

28°C

24°C

Repeat steps and . Press the SET button for 2 seconds or more to complete the temperature SET BACK timer settings.

To cancel

3 4

ex. Display during SET BACK timer operation (The operating time will not be displayed.)

Press the SET BACK button. The SET BACK confirmation display appears for 5 seconds, and then the timer starts automatically.

NOTES

The SET BACK timer only changes the set temperature, it cannot be used to start or stop air conditioner operation. The SET BACK timer can be set to operate up to two times per day but only one temperature setting can be used. The SET BACK timer can be used together with the ON, OFF, and weekly timer functions. The SET BACK operating time is displayed only in the SET BACK confirmation display. (Refer to step 1 for the SET BACK confirmation display. )

During the COOL/DRY mode, the air conditioner will operate at a minimum of 18°C even if the SET BACK temperature is set to 17°C or lower. Room temperatures as low as 10, 12, and 14°C cannot be set depending on the model.

Press the SET BACK button, and then press the DELETE button while the SET BACK confirmation display is displayed. Even if the SET BACK button is pressed again, the SET BACK timer will be cancelled.

03-18

Page 63

4. TROUBLE SHOOTING

Page 64

4. TROUBLESHOOTING

4-1 NORMAL OPERATION

4-1-1 Indoor Unit Display

Flashing PatternIndication LampIndication type

Operation

Continuous lighting

Operation LED

Continuous lighting(lowered light)Anti Freeze

Continuous lighting(lowered light)Timer LEDTimer

Filter Filter LED Continuous lighting

1 sec 1 sec

Operation LED

OFF

Power Failure

1 sec

6 sec 2 sec

Defrosting

Oil Recovery

Timer LED

Operation LEDTest Operation

Timer LED

Operation LED

OFF

1 sec

Opposite Operation Mode

Maintenance Mode

Timer LED

Operation LED

Timer LED

Filter LED

OFF

3 sec 1 sec

1 sec 1 sec

04-01

Page 65

4-1-2 OUTDOOR UNIT DISPLAY

Indication type 7 Segment LED Pattern

Idling(stop)

Cooling Mode

Heating Mode

Oil Recovery Operation

Defrost Operation

System stooped with Discharge Temp. Protection

System stopped with High Pressure Protection

System stopped with Low Pressure Protection

System stopped with compressor Temperature Protection

Blank

"C" OO "L"

"H" EA "T"

"O" IL "R" ECOVERY

"D" E "F" ROST

"P" ROTECT "1"

"P" ROTECT "2"

"P" ROTECT "3"

"P" ROTECT "4"

Description

Refer to 02-10 page for operation.

Refer to 02-11 page for operation.

<Starting condition> Discharge temp fixed value: 115°C <Release condition> 3 minutes have elapsed and discharge temperature 80°C

<Starting condition> High pressure 4.00MPa <Release condition> 5 minutes have elapsed and high pressure 3.50MPa

<Starting condition> Low pressure 0.05MPa or low pressure 0.10MPa continues for 10 minutes <Release condition> 3 minutes have elapsed and low pressure 0.17MPa

<Starting condition> Compressor temp fixed value :110°C <Release condition> 3 minutes have elapsed and discharge temperature 80°C

Peak Cut Mode

Low Noise Mode

Inverter Compressor Operation Indication

POWER

ERROR

MODE

LED101

LED102

(RED)

(GREEN)

LED105

LED104

POWER LED101

ERROR LED102

"P" eak "C" ut

"L" OW "N" OISE

Blinking

OFF

Refer to 02-08 page for operation.

1 sec 1 sec

OFF

04-02

Page 66

4-2 ABNORMAL OPERATION

4-2-1 Indoor Unit Display

Please refer the flashing pattern as follows.

Error Contents

Remote Controller Communication Error

Network Communication Error

Indoor Unit Parallel Communication Error

Indoor Unit Power Frequency Abnormal

Indoor Unit Main PCB Error

Room Temperature Sensor Error

Indoor Unit Heat Ex. Sensor Error

Indoor Unit Fan Motor Error

Water Drain Abnormal

Outdoor Unit Error

1 times flash

4 times flash

5 times flash

9 times flash

4 times flash

6 times flash

3 times flash

15 times flash

Filter LEDTimer LEDOperation LED

Continuous flash2 times flash1 times flash

Continuous flash

Continuous flash1 times flash3 times flash

Continuous flash 2 times flash3 times flash

Continuous flash1 times flash

Continuous flash2 times flash

Continuous flash1 times flash

Continuous flash

Trouble shooting

1,3

5,6

12 ~ 48

Depending on contents of Outdoor unit, it may not indicate. (Refer to "TROUBLE LEVEL OF SYSTEM")

Error Indication Flashing Pattern

Example : Indoor Unit Main PCB Error (Operation LED : 3 times, Timer LED : 2 times)

1 cycle

1.0s

Operation LED

Timer LED

Filter LED

OFF

0.5s 0.5s

0.1s / 0.1s

0.5s 0.5s 0.5s 0.5s

4.0s

1.0s

3.0s

0.5s 0.5s

1.0s

4.0s

04-03

Page 67

4-2-2 Outdoor Unit Display

LED display

POWER

ERROR

MODE

POWER MODE LED : on ERROR LED : blink

LED101

LED102

(GREEN)

(RED)

Operation button

MODE

SW107

EXIT

SELECT

SW108 SW109

ERROR transition

Short press : less than 3 seconds Long press : more than 3 seconds

POWER

LED101

OFF

0.1sec 0.1sec

ERROR LED102

OFF

ENTER

Annunciation

"Err." and quantity are alternately shown.

"ENTER" short press"ENTER" short press

Type of errors

ex : discharge thermistor 1 abnormal ex : indoor unit abnormal

"SELECT" short press display change

When there is more than one error, display is changed by "SELECT" short press.

"ENTER" short press"ENTER" long press

If some error is newly occured or resolved during transition, it is reflected after going back to "Annunciation".

Address

"SELECT" short press display change

When more than one indoor unit is abnormal, display is changed by "SELECT" short press.

04-04

* Only in the case of "indoor unit abnormal (E.5U.1)", indoor unit address is shown by ENTER long press.

Page 68

4-2-3 Error Code List for Outdoor Unit

Error

Code

- - - -

1 4 . 2

1 4 . 5

2 8 . 1

2 8 . 4

5 U . 1

6 2 . 3

6 2 . 6

6 2 . 8

6 3 . 1

6 7 . 2

6 9 . 1

7 1 . 1

7 2 . 1

7 3 . 3

Error Contents

Initial Setting Error

Outdoor unit Network communication abnormal 2

The number of Indoor unit shortage

Auto Address Setting Error

Signal Amplifier Auto Address Setting Error

Indoor Unit Error

Outdoor Unit EEPROM Access Error

Inverter Communication Error

EEPROM Data corrupted Error

Inverter Error

Inverter PCB short intereuption detection

Outdoor Unit transmission PCB Parallel Communication Error

Discharge Temp. Sensor Error < TH1 >

Compressor Temp. Sensor Error < TH10 >

Heat Ex. Liquid pipe Temp. Sensor Error < TH5 >

Trouble

shooting

1 - 11

Error Code

9 3 . 1

9 4 . 1

9 5 . 5

9 7 . 1

9 7 . 4

9 7 . 5

9 8 . 5

A 1 . 1

A 3 . 1

A 4 . 1

A 4 . 2

A 5 . 1 Low Pressure Abnormal

Inverter Compressor Start Up Error

Trip Detection

Compressor Motor Loss of Synchronization

Outdoor Unit Fan Motor Lock Error (Start up Error)

Outdoor unit FAN motor under voltage (Lack of DC Voltage)

Outdoor Unit Fan Motor 1 Temperature Abnormal 39

Outdoor Unit Fan Motor Lock Error (Start up Error)

Outdoor Unit Fan Motor 2 Temperature Abnormal 39

Coil ( Expansion Valve 1 ) Error 409 A . 1

Coil ( Expansion Valve 2 ) Error 409 A . 2

Discharge Temperature Abnormal

Compressor Temperature Abnormal

High Pressure Abnormal

High Pressure Protection 1

Error Contents

Trouble

shooting

379 8 . 1

7 4 . 1

7 5 . 1

7 7 . 1

8 2 . 1

8 2 . 2

8 3 . 2

8 4 . 1

8 6 . 1

8 6 . 3

8 6 . 4

Outdoor Temp. Sensor Error < TH3 >

Suction Gas Temp. Sensor Error < TH4 >

Heat Sink Temp. Sensor Error < IPM built in >

SC HE. Gas Inlet Temp. Sensor Error < TH8 >

SC HE. Gas Outlet Temp. Sensor Error < TH9 >

SC HE. Liquid Outlet Temp Sensor Error < TH7 >

Current Sensor Error

Discharge Pressure Sensor Error

Suction Pressure Sensor Error

High Pressure Switch Error

04-05

Page 69

4-2-4 Remote Controller Display

<< SIMPLE REMOTE CONTROLLER >>

ERROR CODE DISPLAY

If an error occurs, the following display will be shown. (“ “ will appear in the set room temperature display.)

“ is displayed, immediately contact authorized

If “ service personnel.

<< WIRED REMOTE CONTROLLER >>

Error code

Faulty unit No. (Remote controller address)

Ex. Error code display

ERROR CODE DISPLAY

If an error occurs, the following display will be shown. (“ “ will appear in the set room temperature display.)

“ is displayed, immediately contact authorized

If “ service personnel.

<< GROUP REMOTE CONTROLLER >>

ERROR CODE DISPLAY

The air conditioning system must be inspected if “ : “ (error code) appears on the timer and Clock Display, or the

operation lamp is flashing.

*1 ;

Model code

: Outdoor unit : Indoor unit : Group remote controller : Convertor

Unit number (usually 0) Error code

Ex. Error code display

Model code

Error code

Ex. Error code display

04-06

Page 70

4-2-5 Error Code List for Simple and Wired Remote Controller

Error Code

1 2

1 4

1 5

1 6

3 1

3 2

Error Contents

Remote Controller Communication Error

Network Communication Error

Scan Error

Indoor Unit Parallel Communication Error

Indoor Unit Power Frequency Abnormal

Indoor Unit Main PCB Error

Trouble

shooting

9, 82

1, 3

Error Code

4 1

4 2

5 1

5 3

9 U

4-2-6 Error Code List for Group Remote Controller

Error Code

- -

1 2

1 4

1 5

1 6

Error Contents

Initial Setting Error

Remote Controller Communication Error

Network Communication Error

Scan Error

Indoor Unit Parallel Communication Error

Trouble

shooting

9,10,71,77

11,13,14,80

Error Code

8 2

8 3

8 4

8 6

9 3

Error Contents

Room Temperature Sensor Error

Indoor Unit Heat Ex. Sensor Error

Inddor Unit Fan Motor Error

Water Drain Abnormal

Outdoor Unit Error

Error Contents

Sub-cool Heat Ex. Gas Temperature Sensor Error

Liquid Pipe Temperature Sensor Error

Current Sensor Error

Pressure Sensor Error

Compressor Start Up Error

Trouble

shooting

5, 6

12 48

Trouble

shooting

27,28

31 33

2 6

2 8

3 1

3 2

4 1

4 2

5 1

5 3

6 2

6 3

6 7

6 9

7 1

7 2

7 3

7 4

7 5

Address Setting Error

Other Setting Error

Indoor Unit Power Frequency Abnormal

Indoor Unit Main PCB Error

Room Temperature Sensor Error

Indoor Unit Heat Ex. Sensor Error

Indoor Unit Fan Motor Error

Water Drain Abnormal

Outdoor Unit Main PCB Error

Inverter Error

Inverter PCB short interruption detection

Outdoor Unit transmission PCB Error

Discharge Temperature Sensor Error

Compressor Temperature Sensor Error

Heat Ex. liquid pipe Temperature Sensor Error

Outdoor Temperature Sensor Error

Suction Gas Temperature Sensor Error

46, 47

1, 3

5, 6

15 17

9 4

9 5

9 7

9 8

9 A

A 1

A 3

A 4

A 5 Low Pressure Abnormal

C 4 PCB Error 76

C A Software Error 67, 74

C 1 PCB Error 1 65, 70

Trip Detection

Compressor Motor loss of Synchronization

Outdoor Unit Fan Motor 1 Error

Outdoor Unit Fan Motor 2 Error

Coil ( Expansion Valve ) Error

Discharge Temperature Abnormal

Compressor Temperature Abnormal

High Pressure Abnormal

37 39

43, 44

7 7 Heat Sink Temperature Sensor Error

04-07

Page 71

4-2-7 TROUBLE LEVEL OF SYSTEM

<< System Condition when Outdoor Unit Error is occurred >>

1 2

System Condition

Outdoor unit Condition

>Abnormal >LED indication >Outdoor unit does not stop

(1) Not indicated on Indoor Unit. Not indicated on Peripheral Unit. Indicated on Service Tool.

(Not available)

Trouble Level

(2) Indicated on Indoor Unit. Indicated on Peripheral. Indicated on Service Tool.

> Suction gas Temp sensor error > Outdoor Temp sensor error > Sub-cool heat Ex. gas inlet Temp sensor error > Sub-cool heat Ex. gas outlet Temp sensor error

System is not stopped compulsorily

>Abnormal >LED indication >Outdoor unit does not stop

>Temporary blackout detection protection (Inverter compressor stop)

> Discharge temperature abnormal (Inverter compressor stops) > Compressor temperature abnormal (Inverter compressor stops) > High pressure switch error (Inverter compressor stops) > High pressure switch error (Constant speed compressor stops) > Discharge Temp sensor error (Inverter compressor stops) > Compressor Temp sensor error (Inverter compressor stop) > Heat sink Temp sensor error (Inverter compressor stop) > Current sensor error (Inverter compressor stop) > High pressure switch error (Inverter compressor stop) > Inverter error (Inverter compressor stop) > Heat sink temperature abnormal (Inverter compressor stop) > Inverter compressor start up error (Inverter compressor stop) > Trip detection (Inverter compressor stops) > Rush current limiting resister Temp rise protection (Inverter compressor stop) > Comp. motor loss of synchronization (Inverter compressor stop) > Inverter communication error (Inverter compressor stop) > Outdoor unit EEPROM access error > Outdoor unit EEPROM data corrupted

> Indoor unit number shortage

This will not be displayed on indoor unit which Error Report Target(function setting 47 of indoor unit) is set "for administrator".

04-08

Page 72

System Condition

System is compulsorily stopped.

Outdoor unit Condition

>Abnormal >LED indication >Outdoor unit stops >Need to repair >secondary accident is possible.

Trouble Level

1 2

(1) Not indicated on Indoor Unit. Not indicated on Peripheral Unit. Indicated on Service Tool.

(Not available) >High pressure abnormal

(2) Indicated on Indoor Unit. Indicated on Peripheral. Indicated on Service Tool.

>Low pressure abnormal >Fan motor 1 lock error >Fan motor 2 lock error >Fan motor 1 temp. abnormal >Fan motor 2 temp. abnormal >Heat Ex. liquid Temp sensor error >Discharge pressure sensor error >Suction pressure sensor error >Outdoor unit communication PCB parallel communication error >Outdoor unit network communication 2 error >Lack of DC Voltage >Indoor unit number shortage >SC HE. Liquid Outlet Temp Sensor Error

Even if power is reset, the following Error cannot release.

- Discharge temperature abnormal

- Compressor temperature abnormal

- Current sensor error

- Inverter compressor start up error

- Trip detection

- Rush current limiting resister Temp rise protection

- Comp. motor loss of synchronization

- Low pressure abnormal

- Fan motor 1 lock error

- Fan motor 2 lock error

These errors can not be judged without operating the system, and the serviceman would not be able to check it if the system power is turned off before visiting the site for repair. In Error release, you need to operate push switch and apply "Error reset" (F3-40) after power restart.

04-09

Page 73

Page 74

4-3 TROUBLE SHOOTING

4-3-1 Trouble shooting with error code (INDOOR UNIT)

Trouble shooting 1 INDOOR UNIT Error Method:

Model Information Error (Indoor Unit Main PCB Error)

Indicate or Display: Outdoor Unit : E.5 U.1

Indoor Unit : Operation LED 3 times Flash, Timer LED 2 Times Flash, Filter LED Continuous Flash.

Error Code : 3 2

Detective details:

Detective Actuators:

Indoor Unit Controller PCB Circuit

Forecast of Cause : 1. Outside cause 2. Connection failure of electric components 3. Controller PCB defective

Check Point 1-1 : Reset Power Supply

Does abnormal LED indication show again?

3 continuous failure of read test of EEPROM at Power ON, or Apparent Model information error from EEPROM. Also, Error on Model information upon model information test of EEPROM, or Model information of EEPROM not possible to recover.

YES

Check Point 2 : Check Indoor Unit electric components

Check all connectors (loose connector or incorrect wiring) Check any shortage or corrosion on PCB.

Check Point 3 : Replace Controller PCB

Change Controller PCB and set up the original address.

Check Point 1-2 : Check outside cause (Voltage drop or noise, etc.)

Instant drop ----- Check if there is a large load electric apparatus in the same circuit.

Momentary power failure ----- Check if there is a defective contact or leak current in the power supply circuit.

Noise ----- Check if there is any equipment causing harmonic wave near electric line (Neon bulb or electric equipment that may cause harmonic wave). Check the complete insulation of grounding.

04-11

Note : EEPROM

EEPROM(Electronically Erasable and Programmable Read Only Memory) is a nonvolatile memory which keeps memorized information even if power is turned off. It can change the contents electronically. To change the contents, it uses higher voltage than normal, and it can not change a partial contents. (Rewriting shall be done upon erasing the all contents.) There is a limit in a number of rewriting.

Page 75

Trouble shooting 2 INDOOR UNIT Error Method:

Power Frequency Abnormal

Indicate or Display: Outdoor Unit : E.5 U.1

Indoor Unit : Operation LED 3 times Flash, Timer LED 1 Times Flash, Filter LED Continuous Flash.

Error Code : 3 1

Detective Actuators:

Indoor Unit Controller PCB Circuit

Forecast of Cause : 1. Outside cause 2. Installation failure 3. Defective connection of electric components

4. Controller PCB defective

Check Point 1-1 : Reset Power Supply

Does abnormal LED indication show again?

Detective details:

When 5 continuous failures occurred at Power frequency test.

YES

Check Point 1-2 : Check outside cause (Voltage drop or noise, etc.)

Check Point 2 : Check Installation condition

Check Cable/Breaker Check loose or removed connection

>> If Installation defect is found, correct it by referring

to Installation Manual.

Instant drop ----- Check if there is a large load electric apparatus in the same circuit.

Momentary power failure ----- Check if there is a defective contact or leak current in the power supply circuit.

Noise ----- Check if there is any equipment causing harmonic wave near electric line (Neon bulb or electric equipment that may cause harmonic wave). Check the complete insulation of grounding.

Wrong power supply installation ----- Check if the power supply frequency is stable or not.

Check Point 3 : Check connection of electric components

Check power supply voltage (AC230V between Indoor unit terminal 1 and 2) Check connection of Connector (any lose connector or incorrect wiring) Check any shortage or corrosion on PCB.

Check Point 4 : Replace Controller PCB

Change Controller PCB and set up the original address.

04-12

Page 76

Trouble shooting 3 INDOOR UNIT Error Method:

EEPROM Access Abnormal (Indoor Unit Main PCB Error)

Indicate or Display: Outdoor Unit : E.5 U.1

Indoor Unit : Operation LED 3 times Flash, Timer LED 2 Times Flash, Filter LED Continuous Flash.

Error Code : 3 2

Detective Actuators:

Indoor Unit Controller PCB Circuit

Forecast of Cause :

1. Outside cause 2. Defective connection of electric component 3. Controller PCB defective

Detective details:

When 3 continuous failure occurred on read test of EEPROM.

Check Point 1-1 : Reset Power Supply

Does abnormal LED indication show again?

YES

Check Point 2 : Check Indoor Unit electric components

Check all connectors (loose connector or incorrect wiring) Check any shortage or corrosion on PCB.

Check Point 3 : Replace Controller PCB

Change Controller PCB and set up the original address.

Check Point 1-2 :Check outside cause (Voltage drop or noise, etc.)

Instant drop ----- Check if there is a large load electric apparatus in the same circuit.

Momentary power failure ----- Check if there is a defective contact or leak current in the power supply circuit.

Noise ----- Check if there is any equipment causing harmonic wave near electric line (Neon bulb or electric equipment that may cause harmonic wave). Check the complete insulation of grounding.

04-13

Page 77

Trouble shooting 4 INDOOR UNIT Error Method:

Room Temperature Sensor Error

Indicate or Display: Outdoor Unit : E.5 U.1 Indoor Unit : Operation LED 4 times Flash, Timer LED 1 Times Flash, Filter LED Continuous Flash.

Error Code : 4 1

Detective Actuators:

Indoor Unit Controller PCB Circuit Indoor Temperature Thermistor

Forecast of Cause :

1. Connector defective connection 2. Thermistor defective 3. Controller PCB defective

Detective details:

When Indoor thermistor open or shortage is detected at power ON.

Check Point 1 : Check connection of Connector

Check if connector is loose or removed Check erroneous connection Check if thermistor cable is open

>>Reset Power when reinstalling due to removed connector or incorrect wiring.

Check Point 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Rough value)

Temperature (°C)

2520151050

10.012.515.820.125.233.6Resistance Value ( )

Temperature (°C)

504540

8.0

6.5

3.54.35.3Resistance Value ( )

If Thermistor is either open or shorted, replace it and reset the power.

Check Point 3 : Check voltage of Controller PCB (DC5.0V)

Make sure circuit diagram of each indoor unit and check terminal voltage at Thermistor (DC5.0V)

Duct Schematic Diagram (Connector connection)

H/E Inlet Thermistor (CN20 Wire:Black)

H/E Outlet Thermistor (CN20 Wire:Gray)

Room Temp. Thermistor (CN19 Wire:Black)

Cassette Schematic Diagram (Connector connection)

H/E Inlet Thermistor (CN9 Wire:Black)

H/E Outlet Thermistor (CN9 Wire:Gray)

Small size Wall mount Schematic Diagram(Direct soldering to PCB)

Wall mount Schematic Diagram (Connector connection)

H/E Inlet Thermistor (CN17 Wire:Black)

H/E Outlet Thermistor (CN17Wire:Gray)

H/E Intlet Thermistor

(CN12 Wire:Black)

H/E Outlet Thermistor

(CN11 Wire:Gray)

Room Temp. Thermistor

(CN10 Wire:Black)

Room Temp. Thermistor (CN8 Wire:Black)

If the voltage does not appear, replace Controller PCB and set up the original address.

Room Temp. Thermistor (CN16 Wire:Black)

04-14

Page 78

Trouble shooting 5 INDOOR UNIT Error Method:

Heat Exchanger Inlet Sensor Error

Indicate or Display: Outdoor Unit : E.5 U.1 Indoor Unit : Operation LED 4 times Flash, Timer LED 2 Times Flash, Filter LED Continuous Flash. Error Code : 4 2

Detective Actuators:

Indoor Unit Controller PCB Circuit Heat Exchanger Inlet Thermistor

Forecast of Cause :

1. Connector defective connection 2. Thermistor defective 3. Controller PCB defective

Detective details:

When open or shorted Heat Exchanger Inlet Thermistor is detected at Power ON.

Check Point 1 : Check connection of Connector

Check if connector is loose or removed Check erroneous connection Check if thermistor cable is open

>>Reset Power when reinstalling due to removed connector or incorrect wiring.

Check Point 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Rough value)

Temperature (°C)

Resistance Value ( )

2520151050

49.862.579.1100.9129.8168.6

40.0

32.4

Temperature (°C)

Resistance Value ( )

If Thermistor is either open or shorted, replace it and reset the power.

504540

17.821.226.3

Check Point 3 : Check voltage of Controller PCB (DC5.0V)

Make sure circuit diagram of each indoor unit and check terminal voltage at Thermistor (DC5.0V)

Duct Schematic Diagram (Connector connection)

H/E Inlet Thermistor (CN20 Wire:Black)

H/E Outlet Thermistor (CN20 Wire:Gray)

Room Temp. Thermistor (CN19 Wire:Black)

Cassette Schematic Diagram (Connector connection)

H/E Inlet Thermistor (CN9 Wire:Black)

H/E Outlet Thermistor (CN9 Wire:Gray)

Small size Wall mount Schematic Diagram(Direct soldering to PCB)

Wall mount Schematic Diagram (Connector connection)

H/E Inlet Thermistor (CN17 Wire:Black)

H/E Outlet Thermistor (CN17 Wire:Gray)

H/E Intlet Thermistor

(CN12 Wire:Black)

H/E Outlet Thermistor

(CN11 Wire:Gray)

Room Temp. Thermistor

(CN10 Wire:Black)

Room Temp. Thermistor (CN8 Wire:Black)

If the voltage does not appear, replace Controller PCB and set up the original address.

Room Temp. Thermistor (CN16 Wire:Black)

04-15

Page 79

Trouble shooting 6 INDOOR UNIT Error Method:

Heat Exchanger Outlet Sensor Error

Indicate or Display: Outdoor Unit : E.5 U.1 Indoor Unit : Operation LED 4 times Flash, Timer LED 2 Times Flash, Filter LED Continuous Flash. Error Code : 4 2

Detective Actuators:

Indoor Unit Controller PCB Circuit Heat Exchanger Outlet Thermistor

Forecast of Cause : 1. Connector defective connection 2.Thermistor defective 3.Controller PCB defective

Detective details:

When open or shorted Heat Exchanger outlet Thermistor is detected at Power ON.

Check Point 1 : Check connection of Connector

Check if connector is loose or removed Check erroneous connection Check if thermistor cable is open

>>Reset Power when reinstalling due to removed connector or incorrect wiring.

Check Point 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Rough value)

Temperature (°C)

Resistance Value ( )

Temperature (°C)

2520151050

49.862.579.1100.9129.8168.6

40.0

504540

32.4

Resistance Value ( )

If Thermistor is either open or shorted, replace it and reset the power.

17.821.226.3

Check Point 3 : Check voltage of Controller PCB (DC5.0V)

Make sure circuit diagram of each indoor unit and check terminal voltage at Thermistor (DC5.0V)

Duct Schematic Diagram (Connector connection)

H/E Inlet Thermistor (CN20 Wire:Black)

H/E Outlet Thermistor (CN20 Wire:Gray)

Room Temp. Thermistor (CN19 Wire:Black)

Cassette Schematic Diagram (Connector connection)

H/E Inlet Thermistor (CN9 Wire:Black)

H/E Outlet Thermistor (CN9 Wire:Gray)

Small size Wall mount Schematic Diagram(Direct soldering to PCB)

Wall mount Schematic Diagram (Connector connection)

H/E Inlet Thermistor (CN17 Wire:Black)

H/E Outlet Thermistor (CN17 Wire:Gray)

H/E Intlet Thermistor

(CN12 Wire:Black)

H/E Outlet Thermistor

(CN11 Wire:Gray)

Room Temp. Thermistor

(CN10 Wire:Black)

Room Temp. Thermistor (CN8 Wire:Black)

If the voltage does not appear, replace Controller PCB and set up the original address

Room Temp. Thermistor (CN16 Wire:Black)

04-16

Page 80

Trouble shooting 7 INDOOR UNIT Error Method:

Water Drain Abnormal

Indicate or Display: Outdoor Unit : E.5 U.1 Indoor Unit : Operation LED 5 times Flash, Timer LED 3 Times Flash, Filter LED Continuous Flash.

Error Code : 5 3

Detective Actuators:

Indoor Unit Controller PCB Circuit Float Switch

Forecast of Cause : 1. Float switch defective 2. Shorted connector/wire 3. Controller PCB defective 4. Drain pump defective

Detective details:

When Float switch is ON for more than 3 minutes.

Check Point 1 : Check Float Switch

Check operation of float switch. (any blocking by dust, etc.) Remove Float switch and check ON/OFF switching operation

by using a meter.

>>If Float switch is defective, replace it.

ON OFF

Check Point 2 : Check Connector (CN 1) / Wire

Check loose contact of CN1 /shorted wire (pinched wire).

>>Replace Float switch if the wire is abnormal

Check Point 3 : Check Controller PCB

If Check Point 1 & 2 do not improve the symptom, change

Controller PCB and set up the original address.

Attention!!

Small size wall mount type does not have a float switch. In this case, replace Controller PCB and set up the original address. Please refer to.

04-17

Page 81

Trouble shooting 8 INDOOR UNIT Error Method:

Indoor Unit Fan Motor Error

Indicate or Display: Outdoor Unit : E.5 U.1 Indoor Unit : Operation LED 5 times Flash, Timer LED 1 Times Flash, Filter LED Continuous Flash. Error Code : 5 1

Detective details:

Detective Actuators:

Indoor Unit Controller PCB Circuit Indoor Fan Motor

Forecast of Cause : 1. Fan rotation failure 2. Fan motor winding open 3. Motor protection by surrounding temp. increase

4. Capacitor failure 5. Control PCB failure

When Indoor fan control is either phase control or DC control and rotation feed back control is ON, the feed back rotation value becomes 0 and lasts for more than 1 minute at motor operation condition. Or, the feed back rotation value continues at 1/3 of target value for more than 1 minute.

Check Point 1 : Check rotation of Fan

Rotate the fan by hand when operation is off.

(Check if fan is caught, dropped off or locked motor)

>>If Fan or Bearing is abnormal, replace it.

Check Point 2 : Check Motor winding

Check Indoor Fan motor

>>If Fan motor is abnormal, replace it.

Check Point 3 : Check ambient temp. around motor

Check excessively high temperature around the motor.

(If there is any surrounding equipment that causes heat)

>>Upon the temperature coming down, restart operation..

Check Point 4 : Check Motor Capacitor

Check continuity of motor capacitor

>>If it is shorted, replace the capacitor.

Check Point 5 : Replace Controller PCB

Change Controller PCB and set up the original address.

Attention!!

In case of Duct type, replace Controller PCB and set up the original address, since it is a tapping control.

04-18

Page 82

Trouble shooting 9 INDOOR UNIT Error Method:

Wired Remote Controller Communication Error

Indicate or Display: Outdoor Unit : E.5 U.1 Indoor Unit : Operation LED 1 times Flash, Timer LED 2 Times Flash, Filter LED Continuous Flash. Error Code : 1 2

Detective Actuators:

Indoor unit controller PCB circuit Wired Remote Control

Forecast of Cause : 1. Terminal connection abnormal 2. Wired Remote Control failure 3. Controller PCB failure

Detective details:

Upon receiving the signal more than 1 time from Wired Remote or other Indoor unit, but the same signal has not been received more than 1 minute.

Check Point 1 : Check the connection of terminal

After turning off the power, check & correct the followings.

Indoor Unit - Check the connection of terminal between remote control and Indoor unit, or between Indoor units, and

check if there is a disconnection or short of the cable.

Check Point 2 : Check Remote and Controller PCB

Check terminal voltage of controller PCB Connector. (Power supply for Remote)

Cassette Type CN5 , AS*E 07,09,12,14LACH / AS*A 07,09,12,14LACH Type CN7 , Other CN17

If DC12V, Remote Control failure (Controller PCB is OK) >>> Replace Remote If DC0V, Controller PCB failure (Remote is OK) >>> Replace Controller PCB

wiring, turn on the power again.

-In case of re-installation is done due to removed connector or incorrect

Trouble shooting 9 INDOOR UNIT Error Method:

Wired Remote Controller Token Error

Detective Actuators:

Indoor unit Controller PCB circuit Wired Remote Control

Forecast of Cause : 1. Terminal connection abnormal 2. Mis-setting 3. Wired Remote Control failure 4. Controller PCB failure

Indicate or Display: Indoor Unit : Operation LED 1 times Flash, Timer LED 2 Times Flash, Filter LED Continuous Flash. Outdoor Unit : E.5 U.1, Error LED Continuous Flash. Remote Controller : 1 2

Detective details:

More than 1 time of Token (Communication between wired remote controllers) is received, but it was not received more than 1 minute.

Check Point 1 : Check the connection of terminal

After turning off the power, check & correct the followings.

Indoor Unit - Check the connection of terminal between remote control and Indoor unit, or between Indoor units, and

check if there is a disconnection or short of the cable.

Check Point 2 : Check Remote and Controller PCB

Check terminal voltage of Controller PCB Connector. (Power supply for Remote)

Cassette Type CN5 , AS*E 07,09,12,14LACH / AS*A 07,09,12,14LACH Type CN7 , Other CN17

If DC12V, Remote Control failure (Controller PCB is OK) >>> Replace Remote lIf DC0V, Controller PCB failure (Remote is OK) >>> Replace Conroller PCB

In case of re-installation is done due to removed connector or incorrect

wiring, turn on the power again.

04-19

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Trouble shooting 10 INDOOR UNIT Error Method:

Indoor Unit Parallel Communication Error

Indicate or Display: Outdoor Unit : E.5 U.1 Indoor Unit : Operation LED 1 times Flash, Timer LED 6 Times Flash, Filter LED Continuous Flash. Error Code : 1 6

Detective Actuators:

Indoor unit Controller PCB circuit Indoor unit Communication PCB

Forecast of Cause : 1. Connection failure 2. Outside cause 3. Communication PCB failure 4. Controller PCB failure

Check Point 1-1 : Reset the power

Does LED error indication reappear?

Detective details:

When Parallel communication error (Communication reset occurs continuously more than specified times) is detected.

YES

Check Point 2 : Check Connection

Check if Indoor Communication PCB is removed.

Check Point 1-2 : Check outside cause such as noise

Check the complete insulation of the grounding. Check if there is any equipment that causes harmonic wave near the power cable (Neon light bulb or any electronic equipment which causes harmonic wave).

Check Point 3 : Replace Communication PCB

Replace Communication PCB (If the symptom does not change, replace Controller PCB and set up the original address.

04-20

Page 84

Trouble shooting 11 INDOOR UNIT Error Method:

Network Communication Error

Indicate or Display: Outdoor Unit : E.5 U.1 Indoor Unit : Operation LED 1 times Flash, Timer LED 4 Times Flash, Filter LED Continuous Flash. Error Code : 1 4

Detective Actuators:

Indoor unit Controller PCB circuit Indoor unit Communication PCB

Detective details:

When the cut-off of network communication is detected (more than 90 seconds passed since the last receipt of Outdoor unit signal).

Forecast of Cause : 1. Connection failure 2. Outside cause 3. Communication PCB failure 4. Controller PCB failure

Check Point 1 : Check the connection

After turning off the power, check and correct followings.

Is Indoor Communication PCB loose? Check loose or removed connection of communication line between Indoor

and Outdoor unit.

When the signal amplifier is connected , is it failure of signal amplifier? (Refer to "TROUBLE SHOOTING FOR OPTIONAL PARTS")

Check Point 2 : Check if any outside cause such as voltage drop or noise

Instant voltage drop ----- Check if there is any electric equipment with a large load within the same circuit. Momentary power failure ----- Check contact failure or leak current in power supply circuit

>>Check Outdoor Unit as well.

Check if there is any equipment that causes harmonic wave near the power cable (Neon light bulb or any electronic equipment which

causes harmonic wave). And check the complete insulation of grounding.

>>If the same symptom does not reappear after resetting the power, possibility of noise is high.

Check Point 3 : Check Communication PCB and Controller PCB

If some of Indoor units have errors, replace Communication PCB of the Indoor units that have the error.

>>If the symptom does not change, replace Indoor unit Controller PCB.

If all the Indoor units have error, check if the Outdoor Unit Communication PCB has a loose connection.

>>If the symptom does not change, replace Outdoor unit Communication PCB (Replace Controller PCB if it does not change).

04-21

Page 85

4-3-2 Trouble Shooring With Error Code (OUTDOOR UNIT)

3. Main PCB defective

Trouble shooting 12 OUTDOOR UNIT Error Method:

Initial Setting Error

Detective Actuators:

Outdoor unit main PCB

Forecast of Cause :

1. Wrong DIP SW setting

2. Power supply defective

Indicate or Display: Outdoor Unit : - - - - ( Flashing 0.5 sec. ON and OFF ) Indoor Unit : No Display Error Code : No Display

Detective details:

When the DIP SW setting was wrong, after turned on the power supply

Check Point 1 : Check the power supply

Main power ON/OFF state check Power cable connection, open check

Check Point 2 : Check the outdoor unit address/number of connected slave units setting

Setting check of outdoor unit address of each outdoor unit

Outdoor unit address

SET 3-1 SET 3-2

Master

OFF OFF

Check Point 3 : Replace Main PCB

Change Main PCB and set up the original address.

04-22

Page 86

Trouble shooting 13

OUTDOOR UNIT Error Method:

Outdoor Unit Network Communication 1 Error

Indicate or Display:

Outdoor Unit : E. 14. 1 Indoor Unit : No display

Error Code : 14

Detective Actuators:

Outdoor unit Main PCB Outdoor unit communication PCB

1. Noise, momentary open, voltage drop 2. Indoor unit power off

Forecast of Cause :

3. Communication line connection defective 4. Terminal resistor setting mistake

5. Communication PCB mounting defective, Communication PCB defective 6. Main PCB defective

Detective details:

No communication for 180 seconds or more from an indoor unit which received communication once and no outdoor network communication error 2.

Check Point 1 : Noise, momentary open, voltage drop

Check if temporary voltage drop was not generated. Check if momentary open was not generated. Check if ground is connection correctly or there are no related cables near the power line.

Check Point 2 : Check the indoor unit power supply

Main power ON check

Power cable connection and open check

Check Point 3 : Check the communication line connection

Communication line connection, open check

Check Point 4 : Check the Terminal resistor setting

erminal resistor setting check

Check Point 5 : Check the communication PCB (outdoor unit/indoor unit)

Communication PCB connection check

Communication PCB check

Check Point 6 : Replace Main PCB (outdoor unit / indoor unit)

Change Main PCB and set up the original address.

04-23

Page 87

Change Main PCB and set up the original address.

Trouble shooting 14 OUTDOOR UNIT Error Method ::

Outdoor Unit Network Communication 2 Error

Indicate or Display:

Outdoor Unit : E. 14. 2 Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Filter LED Continuous Flash.

Error Code : 14

Detective Actuators:

Outdoor unit Main PCB Outdoor unit communication PCB

Forecast of Cause :

1. Noise, momentary open, voltage drop 2. Indoor unit power off

3. Communication line connection defective 4. Terminal resistor setting mistake

5. Communication PCB mounting defective, Communication PCB defective 6. Main PCB defective

Detective details:

No communication for 180 seconds or more from all indoor units that once received communication

Check Point 1 : Noise, momentary open, voltage drop

Check if temporary voltage drop was not generated. Check if momentary open was not generated. Check if ground is connection correctly or there are no related cables near the power line.

Check Point 2 : Check the indoor unit power supply

Main power ON check

Power cable connection and open check

Check Point 3 : Check the communication line connection

Communication line connection, open check

Check Point 4 : Check the Terminal resistor setting

Terminal resistor setting check

Check Point 5 : Check the communication PCB (outdoor unit/indoor unit)

Communication PCB connection check

Communication PCB check

Check Point 6 : Replace Main PCB (outdoor unit / in door unit)

04-24

Page 88

Trouble shooting 15

OUTDOOR UNIT Error Method:

Outdoor Unit EEPROM Access Error

Indicate or Display:

Outdoor Unit : E. 62. 3 Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Filter LED Continuous Flash.

Error Code : 62

Detective Actuators:

Outdoor unit Main PCB

Forecast of Cause :

Check Point 1-1 : Turn the power

1. Noise, momentary open, voltage drop 2. Main PCB defective

on agaun.

Error displayed again?

YES

Check Point 2 : Replace Main PCB

Change Main PCB and set up the original address.

Detective details:

Access to EEPROM failed due to some cause after outdoor unit started.

Check Point 1-2 : Noise, momentary open, voltage drop

Check if temporary voltage drop was not generated. Check if momentary open was not generated. Check if ground is connection correctly or there are no related cables near the

power line.

04-25

Page 89

Trouble shooting 16 OUTDOOR UNIT Error Method:

Inverter Communication Error

Indicate or Display:

Outdoor Unit : E. 62. 6 Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Filter LED Continuous Flash. Error Code : 62

Detective Actuators:

Outdoor unit Main PCB Outdoor unit Inverter PCB

Forecast of Cause :

1. Noise 2. Main to Inverter PCBs wiring connection defective

3. Main PCB defective 4. Inverter PCB defective

Check Point 1-1 : Turn the power

Detective details:

on again.

Error displayed again?

YES

Check Point 2 : Check the main to Inverter PCB wiring

Connector connection state check

Cable open check

Communication not received from Inverter PCB for 10 seconds or more

Check Point 1-2 : Noise

Check if ground is connection correctly or there are no related cables near the power line.

Check Point 3 : Check Main PCB

Chack Main PCB. (Refer to "Sarvise Parts Information )

Check Point 4 : Replace Inverter PCB

Replace Inverter PCB.

04-26

Page 90

Trouble shooting 17

OUTDOOR UNIT Error Method:

EEPROM Data corrupted Error

Indicate or Display:

Outdoor Unit : E. 62. 8 Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Filter LED Continuous Flash.

Error Code : 62

Detective Actuators:

Outdoor unit Main PCB

Forecast of Cause :

1. Noise, momentary open, voltage drop 2. Main PCB defective

Detective details:

Set contents sum value memorized in EEPROM and sum value calculated based on the set contents read from EEPROM do not match Regarding the sum value, only the contents set in the push button SW

setting mode (F2) shall be the objective.

Check Point 1-1 : Turn the power on again.

Error generated again after Field setting all clear (push button SW F3 (function mode) -35 execution) and the power was turned back on?

YES NO

Check Point 1-2 : Noise, momentary open, voltage drop

Check if temporary voltage drop was not generated. Check if momentary open was not generated. Check if ground is connection correctly or there are no related cables near the power line.

Check Point 2 : Replace Main PCB

Change Main PCB and set up the original address.

Reset the setting of F2 (setting mode) by push button SW. * To clear the setting of F2 by Field setting all clear.

04-27

Page 91

Trouble shooting 18

OUTDOOR UNIT Error Method:

Inverter Error

Indicate or Display:

Outdoor Unit : E. 63. 1 Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Filter LED Continuous Flash.

Error Code : 63

Detective Actuators:

Inverter PCB Filter PCB

Forecast of Cause :

1. Noise, momentary open, voltage drop. 2. Power supply to Filter PCB (INV) to Inverter PCB wiring disconnection, open 3. Filter PCB ( INV) defective 4. Inverter PCB defective

Check Point 1-1 : Turn the power on again.

Error displayed again?

Detective details:

Error information received from Inverter PCB

Check Point 1-2 : Noise, momentary open, voltage drop

Check if temporary voltage drop was not generated. Check if momentary open was not generated. Check if ground is connection correctly or there are no related cables near the

power line.

YES

Check Point 2 : Check the wiring (Power supply to Filter PCB (INV) to Inverter PCB)

Connector and wiring connection state check Cable open check

Check Point 3 : Check Filter PCB (INV) and Inverter PCB

Check Filter PCB (INV) and Inverter PCB.

04-28

Page 92

Trouble shooting 19 OUTDOOR UNIT Error Method:

Inverter PCB short interruption detection

Indicate or Display:

Outdoor Unit : E. 67. 2 Indoor Unit : No Display

Error Code : 67

Detective Actuators:

Inverter PCB

Forecast of Cause :

1. Noise, momentary power failure, voltage drop

2. Power supply to Filter PCB (INV) to Inverter PCB wiring disconnection, open

3. Main PCB defective 4. Inverter PCB defective

Detective details:

''Momentary power failure" received from Inverter PCB

Check Point 1 : Noise, momentary power failure, voltage drop

Check if temporary voltage drop was not generated. Check if momentary power failure was not generated. Check if ground is connection correctly or there are no related cables near the power line.

Check Point 2 : Check the wiring (Power supply to Filter PCB (INV) to Inverter PCB)

Connector and wiring connection state check Cable open check

Check Point 3 : Check Main PCB

Check Main PCB Power supply

Check Point 4 : Replace Inverter PCB

Replace Inverter PCB.

04-29

Page 93

Trouble shooting 20

OUTDOOR UNIT Error Method: Outdoor Unit transmission PCB

Parallel Communication Error

Indicate or Display:

Outdoor Unit : E. 69. 1 Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Filter LED Continuous Flash.

Error Code : 69

Detective Actuators:

Outdoor unit Main PCB Communication PCB

Forecast of Cause :

1. Noise 2. Communication PCB connection defective

3. Communication PCB defective 4. Main PCB defective

Detective details:

Parallel communication (communication between main CPU and communication PCB ) failed 5 times.

Check Point 1-1 : Turn the power on again.

Check Point 1-2 : Noise

Error displayed again?

Check if ground is connection correctly or there are no related cables near the power line.

YES

Check Point 2 : Check the communication PCB connection

Communication PCB connection check

Check Point 3 : Check the communication PCB

Communication PCB check

Check Point 4 : Replace Main PCB

Change Main PCB and set up the original address.

04-30

Page 94

Check Point 3 : Check voltage of Main PCB (DC5.0V)

Trouble shooting 21 OUTDOOR UNIT Error Method:

Discharge Temp Sensor Error

Indicate or Display:

Outdoor Unit : E. 71. 1 Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Filter LED Continuous Flash.

Error Code : 71

Detective Actuators:

Detective details:

Discharge temperature thermistor 1 short detected

Discharge temperature thermistor 1

Discharge thermistor 1 open detected after compressor 1 operated continuously for 5 minutes or more

Forecast of Cause :

1. Connector connection defective, open

2. Thermistor defective

3. Main PCB defective

Check Point 1 : Check the connector connection and cable open

Connector connection state check Cable open check

Check Point 2 : Check the thermistor

Thermistor characteristics check (Disconnect the thermistor from the PCB and check.) * For the thermistor characteristics, refer to the "Service Parts Information 22".

Main PCB (CN141:1-2) voltage value = 5V Remove the thermistor from Main PCB, check the voltage.

THERMISTOR

(DIS.TEMP )

< TH1 >

BLACK

BLA

BLA 1 2 3 4 5 6

1 2 3 4 5 6

THERMISTOR

(COMP SHELL )

< TH10 >

BLACK

CN141

Discharge temperature sensor 1 (CN141:1-2)

If the voltage does not appear, replace Main PCB and set up orignal address.

04-31

Page 95

Check Point 3 : Check voltage of Main PCB (DC5.0V)

If the voltage does not appear, replace Main PCB and set up orignal address.

Trouble shooting 22

OUTDOOR UNIT Error Method:

Compressor Temp Sensor Error

Indicate or Display:

Outdoor Unit : E. 72. 1 Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Filter LED Continuous Flash.

Error Code : 72

Detective Actuators:

Compressor temperature thermistor 1

Detective details:

Compressor temperature thermistor 1 short detected Compressor thermistor 1 open detected after compressor 1 operated continuously for 5 minutes or more

Forecast of Cause :

1. Connector connection defective, open

2. Thermistor defective

3. Main PCB defective

Check Point 1 : Check the connector connection and cable open

Connector connection state check

Cable open check

Check Point 2 : Check the thermistor

Thermistor characteristics check (Disconnect the thermistor from the PCB and check.) * For the thermistor characteristics, refer to the "Service Parts Information 22".

Main PCB (CN141:5-6) voltage value = 5V Remove the thermistor from Main PCB, check the voltage.

THERMISTOR

(COMP SHELL1)

THERMISTOR

(DIS.TEMP.1)

<TH1>

K C

BLA

BLACK

BLACK 1 2 3 4 5 6

1 2 3 4 5 6

<TH10>

K C

BLA

CN141

Compressor temperature sensor 1 (CN141:5-6)

04-32

Page 96

Check Point 3 : Check voltage of Main PCB (DC5.0V)

If the voltage does not appear, replace Main PCB and set up orignal address.

Trouble shooting 23 OUTDOOR UNIT Error Method:

Outdoor Unit Heat Ex. Liquid Temp. Sensor Error

Indicate or Display:

Outdoor Unit : E. 73. 3 Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Filter LED Continuous Flash.

Error Code : 73

Detective Actuators:

Heat exchanger liquid temperature thermistor

Forecast of Cause :

1. Connector connection defective, open

2. Thermistor defective

3. Main PCB defective

Detective details:

Heat exchanger liquid temperature thermistor short or open detected

Check Point 1 : Check the connector connection and cable open

Connector connection state check

Cable open check

Check Point 2 : Check the thermistor

Thermistor characteristics check (Disconnect the thermistor from the PCB and check.) * For the thermistor characteristics, refer to the "Service Parts Information 22".

Main PCB (CN143:3-4) voltage value = 5V Remove the thermistor from Main PCB, check the voltage.

(SUC. TEMP.)

< TH4 >

(HEX. EXIT.)

THERMISTOR

BLACK

BLACK 1 2 3 4

1 2 3 4

< TH5 >

THERMISTOR

K C

BLACK

BLA

CN143

Heat exchanger liquid temperature sensor (CN143:3-4)

04-33

Page 97

Check Point 3 : Check voltage of Main PCB (DC5.0V)

If the voltage does not appear, replace Main PCB and set up orignal address.

Trouble shooting 24 OUTDOOR UNIT Error Method:

Outdoor Temp Sensor Error

Indicate or Display:

Outdoor Unit : E. 74. 1 Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Filter LED Continuous Flash.

Error Code : 74

Detective Actuators:

Outdoor temperature thermistor

Forecast of Cause :

1. Connector connection defective, open

2. Thermistor defective

3. Main PCB defective

Detective details:

Outdoor temperature thermistor short or open detected

Check Point 1 : Check the connector connection and cable open

Connector connection state check Cable open check

Check Point 2: Check the thermistor

Thermistor characteristics check (Disconnect the thermistor from the PCB and check.) * For the thermistor characteristics, refer to the "Service Parts Information ".

Main PCB (CN144:1-3) voltage value = 5V Remove the thermistor from Main PCB, check the voltage.

(OUT TEMP.)

< TH3 >

THERMISTOR

LA B

BLA

1 2 3 1 2 3

CN144

Outdoor temperature sensor (CN144:1-3)

04-34

Page 98

If the voltage does not appear, replace Main PCB and set up orignal address.

Trouble shooting 25

OUTDOOR UNIT Error Method:

Suction Gas Temp Sensor Error

Indicate or Display:

Outdoor Unit : E. 75. 1 Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Filter LED Continuous Flash.

Error Code : 75

Detective Actuators:

Suction gas temperature thermistor

Forecast of Cause :

1. Connector connection defective, open

Detective details:

Suction gas temperature thermistor short or open detected

2. Thermistor defective

3. Main PCB defective

Check Point 1 : Check the connector connection and cable open

Connector connection state check Cable open check

Check Point 2 : Check the thermistor

Thermistor characteristics check (Disconnect the thermistor from the PCB and check.) * For the thermistor characteristics, refer to the "Service Parts Information 22".

Check Point 3 : Check voltage of Main PCB (DC5.0V)

Main PCB (CN143:1-2) voltage value = 5V Remove the thermistor from Main PCB, check the voltage.

THERMISTOR

(SUC. TEMP)

< TH4 >

THERMISTOR

(HEX. EXT)

< TH5 >

K C

BLACK

BLA

BLACK

1 2 3 4 1 2 3 4

CN143

Suction gas temperature sensor (CN143:1-2)

04-35

Page 99

Trouble shooting 26 OUTDOOR UNIT Error Method:

Heat Sink Temp Sensor Error

Indicate or Display:

Outdoor Unit : E. 77. 1 Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Filter LED Continuous Flash.

Error Code : 77

Detective Actuators:

Inverter PCB

Forecast of Cause :

Detective details:

Heat sink temperature thermistor ( Inside IPM ) open/short circuit detected

1. Inverter PCB failure

If this error is displayed, replace Inverter PCB

04-36

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Check Point 3 : Check voltage of Main PCB (DC5.0V)

Trouble shooting 27

OUTDOOR UNIT Error Method: Sub-cool Heat EX. Gas Inlet

Temp Sensor Error

Indicate or Display:

Outdoor Unit : E. 82. 1 Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Filter LED Continuous Flash.

Error Code : 82

Detective Actuators:

Sub-cooling heat exchanger gas inlet temperature thermistor

Forecast of Cause :

1. Connector connection defective, open

Detective details:

Sub-cooling heat exchanger gas inlet temperature thermistor short or open detected

2. Thermistor defective

3. Main PCB defective

Check Point 1 : Check the connector connection and cable open

Connector connection state check Cable open check

Check Point 2 : Check the thermistor

Thermistor characteristics check (Disconnect the thermistor from the PCB and check.) * For the thermistor characteristics, refer to the "Service Parts Information 22".

Main PCB (CN142:5-6) voltage value = 5V Remove the thermistor from Main PCB, check the voltage.

THERMISTOR

(SC.EXT.LIQ)

BLACKBLA

1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8

THERMISTOR

(SC.INT.GAS)

< TH 8 >

(SC.EXT.GAS)

CN142

Sub-cooling heat exchanger gas inlet temperature sensor (CN142:5-6)

04-37