Fujitsu ARU9RLF, ARU12RLF, ARU18RLF, ARU24RLF, AUU9RLF User Manual

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HYBRID FLEX INVERTER SYSTEM

Slim Duct /Compact Cassette Compact Wall Mounted / Wall Mounted

INVERTER MULTI

SERVICE

INSTRUCTION

Models Indoor unit Outdoor unit

R410A

ARU9RLF ARU12RLF ARU18RLF ARU24RLF

AUU9RLF AUU12RLF AUU18RLF

ASU7RLF ASU9RLF ASU12RLF ASU18RLF ASU24RLF

AOU48RLXFZ

CONTENTS

1. DESCRIPTION OF EACH CONTROL OPERATION

1-1. COOLING AND DRY OPERATION.........................................................................

1-2. HEATING OPERATION...........................................................................................

1-3. AUTO CHANGEOVER OPERATION.......................................................................

1-4. INDOOR FAN CONTROL........................................................................................

1-5. LOUVER CONTROL................................................................................................ 01-09

1-6. OUTDOOR FAN CONTROL....................................................................................

1-7. COMPRESSOR CONTROL.....................................................................................

1-8. TIMER OPERATION CONTROL.............................................................................

1-9. ELECTRONIC EXPANSION VALVE CONTROL.....................................................

1-10. TEST OPERATION CONTROL..............................................................................

1-11. 4-WAY VALVE EXTENSION SELECT...................................................................

1-12. AUTO RESTART....................................................................................................

1-13. MANUAL AUTO OPERATION...............................................................................

1-14. FORCED COOLING OPERATION .......................................................................

1-15. COMPRESSOR PREHEATING.............................................................................

1-16. MINIMUM HEAT OPERATIONEHEATING............................................................

1-17. DEFROST OPERATION CONTROL.....................................................................

1-18. OFF DEFROST OPERATION CONTROL.............................................................

1-19. OIL RECOVERY OPERATION...............................................................................

1-20. FRESH AIR CONTROL(For AU / AR type)............................................................

1-21. EXTERNAL ELECTRICAL HEATER CONTROL(For AR type)..............................

1-22. DRAIN PUMP OPERATION...................................................................................

1-23. ECONOMY OPERATION.......................................................................................

1-24. ENERGY SAVING PEAK CUT FUNCTION........................................................... 01-29

1-25. LOW NOISE MODE............................................................................................... 01-29

1-26. VARIOUS PROTECTIONS.................................................................................... 01-30

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

01-11 01-12 01-14 01-17 01-18

01-20 01-20 01-20 01-21 01-21 01-21 01-22 01-24 01-25 01-26 01-26 01-27 01-28

2. TROUBLE SHOOTING

2-1. SERVICE MAINTENANCE FOR HYBRID FLEX INVERTER SYSTEM................

2-2. NORMAL OPERATION..........................................................................................

2-3. ABNORMAL OPERATION.....................................................................................

2-4. TROUBLE SHOOTING..........................................................................................

2-5. SERVICE PARTS INFORMATION.........................................................................

02-01 02-05 02-07

02-16 02-65

3. DISASSENBLLY PARTS

3-1. DISASSEMBLY PROCESS FOR OUTDOOR UNIT................................................

3-2. DISASSEMBLY PROCESS FOR BRANCH BOX....................................................

03-01

03-17

Hybrid Flex Inverter System

1 . DESCRIPTION OF EACH

CONTROL OPERATION

1-1. COOLING AND DRY OPERATION

1-1-1. COOLING AND DRY CAPACITY CONTROL

A sensor (room temperature thermistor) built in the indoor unit body will usually perceive difference or variation between a set temperature and present room temperature, and controls the operation speed of the compressor.

The outdoor unit operates according to the highest request capacity of indoor unit to meet the demand capacity of all the indoor units. The capacity control of the low request capacity indoor unit is controlled by Branch box EEV.

( Table 1 : Compressor speed range )

Minimum Maximum

AOU48RLXFZ

18rps

< Target high pressure control >

The outdoor fan speed is controlled to keep the high pressure to the constant range for stabilizing the distribution performance.

90rps

High pressure

478PSI

338PSI

275PSI

235PSI

( Fig. 1 : Target high pressure range)

Target high pressure

Outdoor temperature

< Target low pressure control >

When the start-up control finished, the outdoor unit starts the target low pressure control. The outdoor unit selects the target low pressure within the following range,

it is decided by the highest request capacity from indoor units.

( Fig. 2 : Target low pressure range)

184PSI

119PSI

Target low pressure

01-01

1-2. HEATING OPERATION

1-2-1. HEATING CAPACITY CONTROL

( Table 2 : Compressor speed range )

Minimum Maximum

AOU48RLXFZ

18rps

< Target high pressure control >

When the start-up control finished, the outdoor unit starts the target high pressure control. The outdoor unit selects the target high pressure within the following range,

it is decided by the highest request capacity from indoor units.

96rps

( Fig. 3 : Target high pressure range for NORMAL HEATING OPERATION)

451PSI

Target high pressure

328PSI

( Fig. 4 : Target high pressure range for MIN. HEAT OPERATION)

272PSI

Target high pressure

190PSI

< Target low pressure control >

The outdoor fan speed is controlled to keep the low pressure to the constant range for the following reasons.

1. Frost prevention

2. Low pressure over rise prevention

( Fig. 5 : Target low pressure range)

123PSI

Target low pressure

109PSI

01-02

1-3. AUTO CHANGEOVER OPERATION

When the air conditioner is set to the Auto mode by remote controller, operation starts in the optimum mode from among the Heating, Cooling, Dry and Monitoring mode. During operation, the optimum mode is automatically switched in accordance with temperature changes. The temperature can be set between 64°F(18°C) and 88°F(30°C) in 2°F(1°C) steps.

When operation starts, indoor fan and outdoor fan are operated for around 3 minutes.

Room temperature and outdoor temperature are sensed, and the operation mode is selected

in accordance with the table below. <Monitoring mode>

( Table 3 : Operation mode selection table )

Room temperature (TR)

TR> Ts+4°F(+2°C)

Operation mode

Cooling

(Autmatic dry)

TR : Room temperature Ts : Setting temperature

Ts+4°F(+2°C) TR Ts -4°F(-2°C)

TR < Ts -4°F(-2°C) Heating

*Middle zone

*If it's Middle zone, operation mode of indoor unit is selected as below.

(1). Same operation mode is selected as outdoor unit.

If outdoor unit is operating in Cooling, Dry, and Heating mode, indoor unit will be operated by the same operation mode.

(2). Selected by the outdoor temperature.

If outdoor unit is operating in other than Cooling, Dry, and Heating mode, indoor unit will be operated according to the outdoor temperature as below.

( Fig. 6 : Outdoor temperature zone selection )

Cooling mode

77°F (25°C)

Heating mode

When Cooling or Dry mode was selected at and air flow mode is Auto, the air conditioner operates as follow.

The same operation as COOLING OPERATION AND DRY OPERATION of page 01-01 is performed. When the room temperature has remained at set temperature -3°F(-1.5°C), operation is automatically switched to Dry mode. If the room temperature reaches set temperature +4°F(+2°C) during Dry mode, operation returns to Cooling.

( Fig.7 : Auto changeover : Cooling - Dry )

( Air flow mode : Auto )

Ts +2°F(+1°C)

Cooling

Ts -3°F(-1.5°C)

(J zone)

Ts -5°F(-2.5°C)

Compressor stop

When the room temperature drops

When Heating was selected at , the same operation as HEATING OPERATION of page

01-02 is performed.

Dry

(X zone)

Ts +4°F(+2°C)

Ts -1°F(-0.5°C)

Ts -3°F(-1.5°C)

When the room temperature rises

TR : Room temperature Ts : Setting temperature

When the compressor was stopped for 6 consecutive minutes by the temperature control function after the Cooling(Auto:Dry) or Heating mode was selected at above, operation is switched

to Monitoring and the operation mode is selected again.

01-03

AUTO CHANGEOVER operation flow chart

HEATING OPERATION

YES

START

Room temp.

Ts+4°F(+2

°C)?

Room temp.

Ts -4°F(-2

°C)?

Middle zone

Operation mode of

outdoor unit : Cooling or Dry?

YES

TS : Setting temperature

YES

COOLING (AUTO:DRY)

OPERATION

YES

Thermostat remains

in OFF state for 6 minutes or

longer?

System stops

or operation command other than

auto changeover operation?

YES

Operation mode of

outdoor unit : Heating?

Outdoor temperature

°F(25°C)?

Thermostat remains

in OFF state for 6 minutes or

longer?

System stops

or operation command other than

auto changeover operation?

YES

01-04

1-4. INDOOR FAN CONTROL

1. Fan speed

( Table 4 : Indoor fan speed table)

ASU7RLF

ASU9RLF

Operation mode

Heating

Cooling / Fan

Dry

ASU12RLF

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Me+

Quiet

Cool Air Prevention

S-Lo

Quiet

*Soft Quiet

Auto

Air flow mode

Me+

Quiet

Cool Air Prevention

S-Lo

Quiet

*Soft Quiet

Auto

Fan Speed

1050 1000

950 850 720 600 480

1050

950 850 710 600

X, J zone:710

Fan Speed

1200 1130 1050

910 720 600

480 1200 1050

880

710

600

X, J zone:710

Operation mode

Heating

Cooling / Fan

Dry

ASU18RLF

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Me+

Quiet

Cool Air Prevention

S-Lo

Quiet

*Soft Quiet

Auto

Air flow mode

Me+

Quiet

Cool Air Prevention

S-Lo

Quiet

*Soft Quiet

Auto

Fan Speed

1100 1040

980 850 720 600 480

1100

980 850 710 600

X, J zone:710

Fan Speed

1260 1120 1020

900 790 680

480 1260 1020

900

770

680

X, J zone:770

ASU24RLF

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Me+

Quiet

Cool Air Prevention

S-Lo

Quiet

*Soft Quiet

Auto

Fan Speed

1430 1320 1220 1020

900 720

480 1480 1220 1020

900

720

X, J zone:900

AUU9RLF

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Cool Air Prevention

*Soft Quiet

*Note, during Economy operation and operation mode is Fan, air flow is 1 step downs. (Hi > Me, Me > Lo, Quiet > Soft Quiet)

01-05

Me+

Quiet

S-Lo

Quiet

Auto

Fan Speed

590 570 540 490 440 400 300 590 540 490 440 400

X, J zone:440

AUU12RLF

AUU18RLF

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Me+

Me Lo

Quiet

Cool Air Prevention

S-Lo

Hi Me Lo

Quiet

Soft Quiet

Auto

ARU9RLF (Static pressure:25Pa)

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Quiet

S-Lo

Quiet

Soft Quiet

Auto

Fan Speed

650 620 580 520 460 400 300 660 580 520 460 400

X, J zone:460

Fan Speed

1260 1160 1060

960

500 1260 1160 1060

960

500

X, J zone:960

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Me+

Quiet

Cool Air Prevention

S-Lo

Quiet

Soft Quiet

Auto

ARU12RLF (Static pressure:25Pa)

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Quiet

S-Lo

Quiet

Soft Quiet

Auto

Fan Speed

840 800 750 650 500 400 300 790 660 570 460 400

X, J zone:460

Fan Speed

1340 1240 1140 1030

500 1340 1240 1140 1030

500

X, J zone:1030

ARU18RLF (Static pressure:25Pa)

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Quiet

S-Lo

Quiet

Soft Quiet

Auto

Fan Speed

1380 1300 1220 1140

600 1380 1300 1220 1140

600

X, J zone:1140

ARU24RLF (Static pressure:25Pa)

Operation mode

Heating

Cooling / Fan

Dry

01-06

Air flow mode

Quiet

S-Lo

Quiet

Soft Quiet

Auto

Fan Speed

1460 1360 1260 1180

600 1460 1360 1260 1180

600

X, J zone:1180

2. FAN OPERATION

The airflow can be switched in 5 steps such as Auto, Quiet, Lo, Me, Hi, while the indoor fan only runs. When Fan mode is set at (Auto), it operates on (Me) Fan Speed.

< All models >

3. COOLING OPERATION (Auto : Cooling)

Switch the airflow [Auto], and the indoor fan motor will run according to a room temperature, as shown in Fig 8. On the other hand, if switched in [Hi] [Quiet], the indoor motor will run at a constant airflow of [Cooling] operation modes Quiet, Lo, Me, Hi.

( Fig.8 : Airflow change - over )

TR-Ts > +4°F(+2°C)

°F(+2°C) > TR-Ts > +2°F(+1°C)

°F(+1°C) > TR-Ts

When the room temperature drops

< All models >

TR-Ts > +5

°F(+2.5°C) > TR-Ts > +3°F(+1.5°C)

°F(+1.5°C) > TR-Ts

When the room temperature rises

TR : Room temperature Ts : Setting temperature

°F(+2.5°C)

4. DRY OPERATION (Auto : Dry)

During the dry operation, the fan speed setting can not be changed, it operates automatically as shown in Fig. 8

Room temperature variation which the room temperature sensor of the indoor unit body has detected.

( Fig. 9 : Indoor fan control )

< Compressor >

OFF

< Indoor fan air flow mode >

Setting air flow

S-Lo

Fan OFF

10 30 60 180 60 180 60 10 30 (sec)

< All models >

01-07

5. HEATING OPERATION

Switch the airflow [Auto], and the indoor fan motor will run according to a room temperature, as shown in Fig 10. On the other hand, if switched in [Hi] [Quiet], the indoor motor will run at a constant airflow of [Heat] operation modes Quiet, Lo, Me, Hi, as shown in Table 4.

( Fig.10 : Airflow change - over ( Heating : Auto ) )

< ASU7/9/12/18/24RLF >

When the room temperature rises

TR-Ts > -2

°F(-1°C) > TR-Ts > -4°F(-2°C)

-2

°F(-1°C) > TR-Ts > -4°F(-2°C)

-2

°F(-2°C) > TR-Ts

-4

TR-Ts > -2

-4

°F(-2°C) > TR-Ts

°F(-1°C)

When the room temperature rises

°F(-1°C)

When the room

Me+

temperature drops

TR-Ts > -3°F(-1.5°C)

-3°F(-1.5°C) > TR-Ts > -5°F(-2.5°C)

-5

°F(-2.5°C) > TR-Ts

< AUU9/12/18RLF, ARU9/12/18/24RLF >

When the room

temperature drops

TR-Ts > -3°F(-1.5°C)

-3°F(-1.5°C) > TR-Ts > -5°F(-2.5°C)

°F(-2.5°C) > TR-Ts

-5

TR : Room temperature Ts : Setting temperature

6. COOL AIR PREVENTION CONTROL (For Heating and Min. Heat operation)

The maximum value of the indoor fan speed is set as shown in Fig 10, based on the detected temperature by the indoor heat exchanger sensor in heating mode. Field setting is necessary at AR and AU type as "Cool air prevention : effective"

( Fig.11 : Airflow change - over for cool air prevention)

During NORMAL HEATING OPERATION

< ASU7/9/12/18/24RLF, AUU9/12/18RLF >

When Indoor heat exchanger temperature rises

107.6°F (42°C)

°F

102.2 (39°C)

°F

98.6 (37°C)

°F

(30°C)

*Me+ or setting

FAN mode

*Lo or setting

FAN mode

Cool air prevention

S-Lo

When Indoor heat exchanger temperature drops

98.6 (37°C)

93.2 (34°C)

89.6 (32°C)

82.4 (28°C)

°F

When Indoor heat exchanger temperature rises

98.6°F (37°C)

84.2°F

(29°C)

< ARU9/12/18/24RLF >

*Hi or setting

FAN mode

*Lo or setting

FAN mode

S-Lo

*Lower speed is selected

During MIN. HEAT OPERATION

< ASU7/9/12/18/24RLF, AUU9/12/18RLF >

When Indoor heat exchanger temperature rises

102.2°F

(39°C)

Auto

When Indoor heat exchanger temperature drops

93.2°F

(34°C)

When Indoor heat exchanger temperature rises

98.6 (37°C)

< ARU9/12/18/24RLF >

Auto

°F

When Indoor heat exchanger temperature drops

°F

89.6 (32°C)

75.2

°F

(24°C)

When Indoor heat exchanger temperature drops

89.6°F (32°C)

01-08

1-5. LOUVER CONTROL

For Compact Wall Mounted Type, Wall Mounted Type < ASU7/ 9/ 12/ 18/ 24RLF >

1. VERTICAL LOUVER CONTROL

(Function Range)

Each time the button is pressed, the air direction range will change as follow:

(Table9 : Recommended Operation Range)

Cooling / Heating / Dry mode / Fan mode

(Fig.12 : Virtical Air Direction Range)

Vertical Louver

Power DiffuserVertical Louver

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.

Cooling / Dry mode : Horizontal flow Heating mode : Downward flow ASU7/9/12: , ASU18/24:

When the temperature of the air being blown out is low at the start of heating operation or during defrosting, the airflow direction temporarily becomes to prevent cold air being blown onto the body.

During use of the Cooling and Dry modes, do not set the Air Flow Direction Louver in the Heating range ( ) for long period of time, since water vapor many condense near the outlet louvers and drop of water may drip from the air conditioner. During the Cooling and Dry modes, if the Air Flow Direction Louvers are left in the heating range for around 30 minutes, they will automatically return to position .

2. HORIZONTAL LOUVER CONTROL (For ASU18/ 24RLF)

(Function Range)

Each time the button is pressed, the air direction range will change as follows.

ASU7/9/12RLF changes by manual.

Cooling / Heating / Dry mode / Fan mode

3. SWING OPERATION

Vertical Airflow Swing Operation

When the swing signal is received from the remote controller, the vertical louver starts to swing.

(Swinging Range)

Cooling mode / Dry mode / Fan mode( ) : Heating mode / Fan mode( ) : ASU7/9/12 [ ], ASU18/24 [ ]

1 3

(Fig.13 : Horizontal Air Direction Range)

Horizontal Louver

When the indoor fan is S-Lo or Stop mode, the swing operation is interrupted and it stops at either upper end or bottom end.

Horizontal Airflow Swing Operation (For ASU18/24RLF )

When the swing signal is received from the remote controller, the horizontal louver starts to swing.

(Swinging Range)

All mode :

When the indoor fan is S-Lo or Stop mode, the swing operation is interrupted and it stops at either upper end or bottom end.

Vertical and Horizontal Airflow Swing Operation

When the horizontal swing signal is input from remote control, the combination of the vertical and horizontal swing operation is performed.

Power Diffuser doesn't swing in any swing operation.

01-09

For Compact Cassette Type < AUU9/ 12/ 18RLF >

1. VERTICAL LOUVER CONTROL

(Function Range)

Each time the button is pressed, the air direction range will change as follows:

1234

(Operation Range)

During COOLING / HEATING / DRY / FAN mode :

1234

(Fig.14 : Air Direction Range)

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.

COOLING / DRY / FAN mode HEATING mode

Horizontal flow Downward flow

1 4

During AUTO mode operation, for the first minute after start-up, air-flow will be horizontal ; the air direction cannot be adjusted during this period.

2. SWING OPERATION

When the swing signal is received from the remote controller, the vertical louver starts to swing. The range of swing depends on the set airflow direction.

The type of operation

COOLING / HEATING / DRY / FAN

Range of swing

When the indoor fan is either at S-Lo or Stop mode, the swinging operation is interrupted and the louver stops at the memorized position. ( Stop mode means Operation stop.)

01-10

1-6. OUTDOOR FAN CONTROL

1. Fan speed table

Table 5 shows the fan speed of the outdoor unit.

( Table 5 : Outdoor fan speed table)

AOU48RLXFZ

Fan step

Fan speed

250

290

340

390

460

580

690

800

890

910

950

[rpm]

2. Limit of fan speed range

Fig.15 shows the limit of fan speed range changes by outdoor temperature.

( Fig.15 : Limit of fan speed range )

Outdoor temperature

86°F(30°C)

68°F(20°C)

50°F(10°C)

< Cooling and Dry mode >

890rpm

580 ~ 890rpm

250 ~ 890rpm

0 ~ 890rpm

Outdoor temperature

41°F(5°C)

< Heating mode >

460 ~ 910rpm

460 ~ 950rpm

3. Initial fan speed control

Initial fan speed is decided by outdoor temperature.

( Fig.16 : Initial fan speed range )

< Cooling and Dry mode >

Outdoor temperature

690rpm

50°F(10°C)

390rpm

If the fan motor is running over than 400rpm, it start up process is stopped in all conditions. [ Prevent the big wind operation ]

When the fan motor is stopped, it can not restart for 10 seconds.

Even if during EEV initialization, outdoor unit fan starts.

01-11

< Heating mode >

Fixed at 690rpm

1-7. COMPRESSOR CONTROL

1. OPERATION SPEED RANGE

The operation speed of the compressor is different based on the operation mode as shown in theTable 6.

( Table 6 : Compressor operation speed range )

Heating

Minimum Maximum

18rps 96rps

AOU48RLXFZ

Dry / Cooling

Minimum Maximum

18rps

90rps

2. OPERATION SPEED CONTROL AT START-UP

The compressor speed soon after the start-up is controlled for

2-1 Cooling and Dry start-up procces

< Pattern 1 >

If it does not meet the condition of pattern 2, the compressor will start at pattern 1.

( Fig.17 : Pttern 1)

(rps)

limit

Upper

speed

180 240

Elapsed time

< Pattern 2 >

If it meets one of the following conditions, the compressor will start at pattern 2.

Condition

Compressor control before operation stops

Target pressure control

Start-up procces 2

Oil recovery / Defrost

Stop time of compressor

Below 3 hours

Compressor temperature

Over 32°C

( Fig.18 : Pattern 2)

(rps)

Upper

speed

limit

(sec)300 330

180 240 Elapsed time

01-12

(sec)300 36070390

2-2 Heating start-up procces

< Pattern 1 >

If it does not meet the condition of pattern 2, the compressor will start at pattern 1.

( Fig.19 : Heating start-up pattern 1)

(rps)

limit

Upper

speed

Elapsed time

690 720

< Pattern 2 >

If it meets one of the following conditions, the compressor will start at pattern 2.

Condition

Compressor control before operation stops

Target pressure control

Start-up procces 2

Oil recovery / Defrost

Stop time of compressor

Below 3 hours

Compressor temperature

Over 89.6°F (32°C)

( Fig.20 : Heating start-up pattern 2)

(rps)

Upper

speed

limit

150 210

Elapsed time

(sec)780 840

(sec)270 33070390

3. LIMIT OF THE COMPRESSOR SPEED RANGE

The compressor speed range is limited by outdoor temperature as shown in Fig.21

( Fig.21 : Limit of the compressor speed range )

< Cooling and Dry mode >

Outdoor temperature

21 ~ 90rps

104°F(40°C)

18 ~ 90rps

50°F(10°C)

25 ~ 90rps

23°F(-5°C)

27 ~ 90rps

14°F(-10°C)

* 0rps

*Protection stop for low outdoor temperature. It will be released when outdoor temperature becomes over than 14°F(-10°C)

01-13

Outdoor temperature

53.6°F(12°C)

41°F(5°C)

5°F(-15°C)

< Heating mode >

21 ~ 90rps

18 ~ 96rps

23 ~ 96rps

25 ~ 96rps

1-8. TIMER OPEARTION CONTROL

1-8-1 WIRELESS REMOTE CONTROLLER

The table 7 shows the available timer setting based on the product model.

( Table 7 : Timer setting )

ON TIMER / OFF TIMER PROGRAM TIMER SLEEP TIMER

1. ON / OFF TIMER

OFF timer : When the clock reaches the set time, the air conditioner will be turned off.

Operation mode

Stop mode

Set time of timer

ON timer : When the clock reaches the set time, the air conditioner will be turned on.

Operation mode

Stop mode

Set time of timer

2. PROGRAM TIMER

The program timer allows the OFF timer and ON timer to be used in combination one time.

Operation mode

Stop mode

Set time Set time Set time Set time

Operation will start from the timer setting (either OFF timer or ON timer) whichever is closest to the clock's current timer setting. The order of operations is indicated by the arrow in the remote control unit's display.

Operation mode

Stop mode

SLEEP timer operation cannot be combined with ON timer operation.

01-14

3. SLEEP TIMER

If the sleep is set, the room temperature is monitored and the operation is stopped automatically. If the operation mode or the set temperature is change after the sleep timer is set, the operation is continued according to the changed setting of the sleep timer from that time ON.

In the cooling operation mode

When the sleep timer is set, the setting temperature is increased 2 F(1 C). It increases the setting temperature another 2 F(1 C) after 1 hour. After that, the setting temperature is not changed and the operation is stopped at the time of timer setting.

Set temperature rises

( Ts : Set temperature )

+4°F (+2°C) +2°F (+1°C)

Stop of operation

Set

60min

In the heating operation mode

When the sleep timer is set, the setting temperature is decreased 2 F(1 C). It decreases the setting temperature another 2 F(1 C) every 30 minutes. Upon lowering 4deg C, the setting temperature is not changed and the operation stops at the time of timer setting.

Set temperature lowers ( Ts : Set temperature )

-2 F(-1 C)

-4 F(-2 C)

-6 F(-3 C)

-8 F(-4 C)

Stop of operation

Set

30min

01-15

1-8-2 WIRED REMOTE CONTROLLER

The Table 8 shows the available timer setting based on the product model.

( Table 8 : Timer setting )

ON TIMER / OFF TIMER WEEKLY TIMER TEMPERATURE SET BACK TIMER

1. ON TIMER / OFF TIMER

Same to 1-8-1 ON / OFF TIMER and shown in those.

2. WEEKLY TIMER

This timer function can set operation times of the each day of the week. All days can be set together,the weekly timer can be used to repeat the timer setting for all of the days.

ON OFF ON OFF ON OFF

Setting day Setting day Setting day

Set time Set time

3. TEMPERATURE SET BACK TIMER

This timer function can change setting temperature of setting operation times of the each day of the week. This can be together with other timer setting.

Set back tmp.

Normal tmp.

Set time Set time

OFF

01-16

1-9. ELECTRONIC EXPANSION VALVE CONTROL

The most proper opening of the electronic expansion valve is calculated and controlled under the present operating condition based on the following values. The compressor frequency, the temperatures detected by the discharge temperature sensor, the indoor heat exchanger sensor, the outdoor heat exchanger sensor, and the outdoor temperature sensor.

1. Pulse range

(Table 9 : Pulse range of outdoor unit EEV)

Outdoor unit

Main EEV

Subcool EEV

Operation mode

Dry / Cooling Heating

During heating operation, lower limit is 0 pulse.

Pulse range

40 ~ 480

35 ~ 480

(Table 10 : Pulse range of branch box EEV)

Branch box

Main EEV

Bypass EEV

Operation mode

Dry / Cooling Heating

There is a case that EEV is full close at 32 10 pulse.

Pulse range

32 ~ 480

0 ~ 480

2. Initialization

Initialization (Input of 528 pulses toward closing direction) is operated under the following conditions. It apply to all of EEV.

< Initialization conditions >

Power-on.

4 hours has passed from the last initialization, and when the compressor starts.

If 12 hours has passed from the last initialization, the compressor is compulsorily stopped.

3 minutes has passed from the protection stop of outdoor unit.

01-17

1-10. TEST OPERATION CONTROL

< Pre-test run check items >

Before the test run, refer to the figure and check the following items.

1. Is check run performed? Test run doesn't operate if check run is not performed. After checking that the above items are all in order, refer to Test run method "to test run the unit. If there are problems, adjust immediately and recheck.

< Test run method >

Be sure to configure test run settings only when the outdoor unit has stopped operating.

Depending on the communication status between the indoor and outdoor units, it may take several minutes for • the system to start operating after settings for the test run are complete. After the test run settings are complete, all the outdoor units and the connected indoor units will start operating. • Room temperature control will not activate during test run (continuous operation). Test run set with the outdoor unit doesn't stop automatically. Be sure to stop the operation according to the • operation method. All indoor units will operate when test run is performed from the outdoor unit. At this time, the remote controller of • the indoor unit is unavailable. Operation mode cannot be changed during the test run. To change the operation mode, please stop the test run •

first, and then perform the test run again. At this time, the compressor cannot be restarted for three minutes after

it stops in order to protect the indoor unit. Please restarte it after three minutes.

With Wired Remote Controller

Under the condition where the air conditioner stops, press the MODE button and the FAN button simultaneously for 2 seconds or more, and the test operation control mode will appear.

During test running, " " will display on the remote controller display. Set the test operation mode, and the compressor will continue to run regardless of whatever the room temperature sensor detects.

With Wireless Remote Controller

Under the condition where the air conditioner runs, press the TEST RUN button, and the test operation control mode will appear. During test running, the Operation LED and Timer LED of the air conditioner body blinks simultaneously. Set the test operation mode, and the compressor will continue to run regardless of whether the room temperature sensor detects.

With Outdoor Unit

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

01-18

Perform test run for refrigerant system. You can set “cooling test run” or “heating test run” with the push-button switch on the outdoor unit print circuit board.

Test run setting method

Function settings

First 2 digits

(Blinking)

Last 2 digits

MODE/EXIT

(Blinking)

SELECT

(Blinking)

SELECT

ENTER

SELECT

For cooling operation, press the SELECT button until

ENTER

Press the ENTER button for more than 3 seconds.

This will be displayed when the cooling test run starts.

(It takes approximately 30 seconds for the outdoor unit to start its operation.)

This will be displayed after 5 seconds.

MODE/EXIT

SELECT

ENTER

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

SELECT

For heating operation, press the

is displayed.

“00”

(Blinking)

SELECT button until

ENTER

Press the ENTER button for more than 3 seconds.

This will be displayed when the heating test run starts.

This will be displayed after 5 seconds.

: Press the “MODE/EXIT” button.

: Press the “SELECT” button.

: Press the “ENTER” button.

Settings for starting

test run operation

is displayed.

“01”

(It takes approximately 30 seconds for the outdoor unit to start its operation.)

SELECT

Settings for stopping

test run operation

(Blinking)

ENTER

Press the ENTER button for more than 3 seconds.

This will be displayed when the cooling operation mode is canceled.

(It takes approximately 30 seconds for the outdoor unit to stop its operation.)

This will be displayed after 5 seconds.

MODE/EXIT

(Blinking)

ENTER

Press the ENTER button for more than 3 seconds.

This will be displayed when the heating operation mode is canceled.

(It takes approximately 30 seconds for the outdoor unit to stop its operation.)

This will be displayed after 5 seconds.

EXIT

After the test run is complete, turn off the power. Attach the cover of the electrical component box and the front panel of the outdoor unit.

01-19

1-11. 4-WAY VALVE EXTENSION SELECT

At the time when the air conditioner is switched from the Cooling mode to Heating mode, the compressor is stopped, and the 4-way valve is switched in 3 minutes later after the compressor stopped.

1-12. AUTO RESTART

When the power was interrupted by a power failure, etc. during operation, the operation contents at that time are memorized and when power is recovered, operation is automatically resumed with the memorized operation contents.

(Table 11 : Operation contents memorized when the power is interrupted)

Wireless remote controller

Wired remote controller (When Memory Backup : Disable)

Wired remote controller (When Memory Backup : Enable)

Operation mode

Set temperature

Set air flow

Thermistor detected position

OFF TimerON Timer

WEEKLY Timer

Timer mode

Temperature

SET BACK Timer

: Memorize

: Not memorize

*It is necessary to set on the DIP-SW1-No,6 of the wired remote controller, to enable the memory backup.

Refer to the installation manual of wired remote controller for details.

1-13. MANUAL AUTO OPERATION

If MANUAL / AUTO Button is pushed continuous from 3 seconds to 10 seconds, manual auto operation will starts. If the remote control is lost or battery power dissipated, this function will work without the remote control.

(Table 12 : Manual auto operation control)

Functions

OPERATION MODE

SETTING TEMP.

FAN MODE

VERTICAL LOUVER

HORIZONTAL LOUVER

TIMER MODE

SWING OPERATION

ECONOMY

All models

Auto changeover

75.2°F(24°C)

Auto

NORMAL

Continuous (No timer setting available)

OFF

01-20

1-14. FORCED COOLING OPERATION

Forced cooling operation is started when pressing MANUAL AUTO button for 10 seconds or more. During the forced cooling operation, it operates regardless of room temperature sensor. Operation LED and timer LED blink during the forced cooling operation. They blink for 1 second ON and 1 second OFF on both operation LED and timer LED (same as test operation). Forced cooling operation is released after 60 minutes of starting operation. FORCED COOLING OPERATION will start as shown in Table12.

( Table 13 : Detail of forced cooling operation)

Forced cooling operation OPERATION MODE FAN CONT. MODE TIMER MODE SETTING TEMP. SETTING LOUVER SWING

Cooling Hi

Room temperature is not controlled

Horizontal OFF

1-15. COMPRESSOR PREHEATING

The compressor temperature is maintained more than ambient temperature (other refrigerant cycle parts) for the following reasons.

⅙

⅙1.To Prevent the compressor damage by the cold start.

2.Speed up the ascent rate of the refrigerant, and the separation of the refrigerant and oil is furthered.

( Table 14 : Detail of compressor preheating operation )

Judgment condition Operation

Start condition

Outdoor temperature 89.6

and

°F (32°C)

Crankcase heater : ON

30 minutes after the compressor stop

Release condition

Outdoor temperature 93.2

Operating instruction to outdoor unit

°F (34°C)

Crankcase heater : OFF

1-16. MINIMUM HEAT OPERATION

MINIMUM HEAT OPERATION functions by pressing MIN HEAT button on the remote controller.

It is almost the same operation as below settings.

( Table 15 : Detail of MINIMUM HEAT OPERATION )

Operation mode

Setting temperature

Defrost operation

Oil recovery operation

Fan mode

Louver setting

Swing setting

LED indication

ON / OFF timer

Only ECONOMY LED (Green)

Heating

50°F (10°C)

Normal operation

01-21

1-17. DEFROST OPERATION CONTROL

1. CONDITION OF STARTING THE DEFROST OPERATION

The defrost operation starts as shown in the following Table 16, 17 and 18.

( Table 16 : Condition of normal defrost operation)

Compressor integrating operation time

Less than

35 minutes

Does not operate

Normal defrost

Outdoor temperature 14°F (-10°C)

Heat exchanger temperature 23°F (-17°C )

Outdoor temperature 14°F (-10°C)

Heat exchanger temperature -14°F (7°C )

Over 35 minutes

> =

and

< =

and

Outdoor temperature 14°F (-10°C)

Heat exchanger temperature -4°F (-20°C )

( Table 17 : Condition of integrating defrost operation)

Compressor integrating operation time

Integrating defrost

Less than

210 minutes

Does not operate

Outdoor temperature 35.6°F (2°C)

Over 210 minutes

Compressor stop

and

< =

Over 240 minutes

Outdoor unit

heat exchanger

temperature

26.6°F (-3°C)

( Table 18 : Condition of Integrating (OFF count) defrost operation)

Compressor continuous operation time

Integrating defrost

(OFF count defrost)

Less than 10 minutes

and

< =

Outdoor temperature 35.6°F (2°C)

Compressor OFF count : 40 times

If any defrost operated, "compressor integrating operation time" and "compressor OFF count" are cleared.

2. CONDITION OF THE DEFROST OPERATION COMPLETION

Defrost operation is released when the conditions becomes as shown in Table 19.

( Table 19 : Condition of defrost release )

Release Condition

Outdoor heat exchanger temperature is higher than 53.6°F(12°C) or Compressor operation time has passed 15 minutes.

01-22

3. Defrost Flow Chart

The defrosting shall proceed by the integrating operation time, outdoor temperature and outdoor heat exchanger temperature as follows.

Outdoor unit operation mode : Heating mode

Compressor integrating

Outdoor

temperature [Ta]

Ta > 14°F(-10°C)

Outdoor

heat exchanger

temperature [Tn]

Tn < 1.4°F(-17°C)

operation time :

Over 35 minutes

Outdoor

heat exchanger

temperature [Tn]

Tn < Ta - 14°F(7°C)

Compressor continuous

operation time

Over 10 minutes

Outdoor

temperature [Ta]

Ta < 14°F(-10°C)

Outdoor

heat exchanger

temperature [Tn]

Tn < -4°F(-20°C)

Compressor

integrating

operation time

Over 240 minutes

Outdoor

heat exchanger

temperature [Ta]

Below 26.6°F(- 3°C)

Compressor

integrating

operation time

Over 210 minutes

Compressor

stop

Outdoor

temperature [Ta]

Ta < 35.6°F(2°C)

Compressor continuous

operation time

Less than 10 minutes

Outdoor

temperature [Ta]

Ta < 35.6°F(2°C)

Compressor

OFF count

40 times

Normal defrost

start

Outdoor heat exchanger temperature (Outlet): Over 53.6° F(12°C)

Compressor : 70rps Outdoor fan motor : OFF

Defrost Indicator: [Operation lamp] 7 sec ON / 2 sec OFF

Main EEV : 480Pulse 4-way valve : OFF Solenoid valve : OFF Indoor fan : OFF

Compressor ON time: Maximum 15 minutes

Defrost end

01-23

Integrating defrost

start

1-18. OFF DEFROST OPERATION CONTROL

When operation stops in the [Heating operation] mode, if frost is adhered to the outdoor unit heat exchanger, the defrost operation will proceed automatically. In this time, the outdoor unit will allow the heat exchanger to defrost, and then stop.

1. OFF DEFROST OPERATION CONDITION

When heating operation stops, all of following conditions are met, OFF defrost operation starts.

1. Compressor operation integrating time lasts for more than 30 minutes.

2. Compressor countinuous operation time lasts for more than 10 minutes.

3. Outdoor unit heat exchenger temperature is less than 24.8°F(-4°C).

If the operation stops in defrost operation, defrost operation is kept untill the it is completed.

2. OFF DEFROST RELEASE CONDITION

OFF defrost operation is released when the conditions becomes as shown in Table 31

( Table 20 : OFF Defrost Release Condition )

Release Condition

Outdoor heat exchanger temperature is higher than 53.6°F(12°C) or Compressor operation time has passed 15 minutes.

OFF Defrost Flow Chart

Heating operation stop

Compressor integrating operation : Over 30 minutes and Compressor countinuous operation time : Over 10 minutes and Outdoor heat exchanger temperature : Below

Defrost start

Outdoor heat exchanger temperature : Over 53.6°F(12°C)

Compressor ON time : Maximum 15 minutes

24.8°F(-4°C)

Defrost end

01-24

1-19. OIL RECOVERY OPERATION

Outdoor unit operates by cooling refrigerant cycle for recover the refrigerant oil to the compressor

1. Cooling oil recovery operation

< Start condition >

It operates forcibly from the compressor integrating time in Cooling and Dry mode.

Condition of the oil recovery operates after 1 hour

(1). First time after power ON (2). When the operation mode changes from Heating to Cooling. (only first time)

Condition of the oil recovery operates after 3 hour

Without condition

< Operation >

Compressor : Over 50rps Outdoor fan : Normal operation 4 way valve : OFF

< Release condition >

*2~7 minutes has passed from the start of oil recovery operation.

2. Heating oil recovery operation

< Start condition >

It operates forcibly when the compressor integrating operation time becomes 12 hours.

< Operation >

Refrigerant cycle is changed to the cooling cycle temporarily.

Compressor : Fixed 50rps Outdoor fan : Step2 (290rpm) 4 way valve : OFF

< Release condition >

*1~5 minutes has passed from the start of oil recovery operation.

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.

*Operation time changes from the progress status of oil recovery.

01-25

1-20. FRESH AIR CONTROL( For AU / AR type)

The fan motor for Fresh Air is operated in synchronization with the indoor fan operation as shown in Figure 22.

(Fig. 22 : Fresh Air control)

Fan motor (Indoor unit)

Fan motor (for Fresh Air)

Operation

Stop

Operation

Stop

*It needs the external relay and power supply.

1-21. EXTERNAL ELECTRICAL HEATER CONTROL (For AR type)

The External Electrical Heater is operated as below.

< Heater : ON condition >

When all of the following conditions are met, external elecrtical heater will operate according to Figure 23.

System type

Operation mode

Compressor

Indoor fan

Heatpump

Heating

ON (S-Lo is excluded)

< Heater : OFF condition >

1). When one of the ON conditions is not met.

2). When Defrost operation or Oil recovery operation starts

(Fig. 23 : External electrical heater control)

Heater : OFF

Ts -6°F(-3°C)

Ts -24°F(-12°C)

When the room temperature drops

Heater : ON

Heater : OFF

When the room temperature rises

Ts : Setting temperature

Ts -2°F(-1°C)

Ts -20°F(-10°C)

01-26

1-22. DRAIN PUMP OPERATION

During Cooling / Dry mode

1. When the compressor starts, the drain pump starts simultaneously.

2. The drain pump operates continuously for 3 minutes after the compressor is turned off.

3. When the compressor stops by the "Anti- freezing protection", the drain pump is turned off in 1 hour after the compressor stops.

4. When the water level in the drain pan rises up and then the float switch functions:

The compressor, indoor and outdoor fan motor operation are stopped.

Drain pump operates continuously for 3 minutes after the float switch is turned off. (Almost condensing water may be drained)

The indoor unit fan motor operates after the float switch is turned off.

5. When the float switch turns ON continuously for 3 minutes, "FAILURE INDICATION" operates.

(It is necessary to turn off power for release it. )

6. When the float switch turns OFF less than 3 minutes, the unit starts Cooling operation.

( Fig. 24 : Detail of Drain Pump Operation in Cooling / Dry )

Compressor

Drain Pump

OFF

3 minutes

Less than 3 minutes

Float Switch

Compressor

Indoor Fan

Drain Pump

OFF

3 minutes ST

OFF

3 minutes

During HEATING / FAN mode / Stop operation

1.When the water level in the drain pan rises up and then the float switch functions: Drain pump operates continuously for 3 minutes after the float switch is turned off.

(Almost condensing water may be drained)

2. When the float switch turns ON continuously for 3 minutes, "FAILURE INDICATION" operates. Thereafter, even if the float switch turns OFF, the "FAILURE INDICATION" is not released. (It is necessary to turn off power for release it. )

( Fig. 25 : Detail of Drain Pump Operation in Heating )

Float Switch

Drain Pump

OFF

01-27

3 minutes

1-23. ECONOMY OPERATION

ECONOMY OPERATION functions by pressing ECONOMY button on the remote controller or

Home controller, it is almost the same operation as below settings.

( Table 20 : Detail of ECONOMY OPERATION)

Operation

mode

Cooling

Heating

Dry

Auto

Outdoor unit

limit current

value

*17.0A

Setting temperature

correction

Ts + 2°F (Ts+1°C)

Ts - 2°F (Ts-1°C)

Ts + 2°F (Ts+1°C)

Cooling : Ts + 2°F (Ts+1°C)

Heating : Ts -2°F (Ts-1°C)

Indoor fan

speed

Normal

operation

(When only fan mode,

air flow downs 1 step)

Indoor unit LED

OPERATION : Lighting

ECONOMY : Lighting

Ts : Setting temperature

Wired remote

controller display

: Lighting

ECO

During ECONOMY OPERATION, *limit current value of outdoor unit is changed to 17.0A When also "ENERGY SAVING PEAK CUT FUNCTION" mode is effective, the outdoor unit will operate by lower current.

ECONOMY OPERATION does not operate in following conditions.

Compressor start-up process

Defrost operation

Oil recovery operation

Minimum heat operation

< Release conditions of ECONOMY OPERATION > 1, When the ECONOMY button on the remote controller is pressed. 2, When the indoor unit start-up by MANUAL AUTO button on the indoor unit. (When the operation is stopped by MANUAL AUTO button, it is not released.)

01-28

1-24. ENERGY SAVING PEAK CUT FUNCTION

The current value is limited to reduce the power consumption by external input terminal 3(CN933). When

and "LOW NOISE OPERATION" are effective, the

(Table 21 : Outline of ENERGY SAVING PEAK CUT FUNCTION)

this function, "CURRENT OVERLOAD OPERATION", "ECONOMY OPERATION"

outdoor unit will operate by lowest current of them.

MODE1

MODE2

50%

MODE3

75%

(Forced thermostat-OFF)

Cooling mode Dry mode

Compressor stop

11.0A 17.0A

Heating mode

*Percentage is rated electrical power ratio

ENERGY SAVING PEAK CUT OPERATION does not operate in following conditions.

Compressor start-up process

Defrost operation

Oil recovery operation

Check run

1-25. LOW NOISE MODE

The outdoor unit operation changes from the capacity priority to the low noise priority by external input 1(CN931). The compressor speed and outdoor fan speed are limited as following table.

MODE4

100%

(Rated)

22.5A

When "CURRENT OVERLOAD OPERATION", "ECONOMY OPERATION" and "PEAK CUT OPERATION" are effective, the outdoor unit will operate by lowest current of them.

( Table 22 : Detail of LOW NOISE OPERATION)

MODE1 MODE2 MODE3

Cooling mode

Dry mode

Limit compressor speed

Limit fan speed

Limit compressor speed

52rps 36rps

690rpm 390rpm

55rps 42rps

45rps

580rpm

49rps

Heating mode

Limit fan speed

690rpm

580rpm 390rpm

(Relative to the rated sound pressure level)

*The performance drops when operating in the LOW NOISE OPERATION.

LOW NOISE OPERATION does not operate in following conditions.

Compressor start-up process

Defrost operation

Oil recovery operation

Check run

01-29

1-26. VARIOUS PROTECTIONS

1. DISCHARGE GAS TEMPERATURE OVER RISE PREVENTION CONTROL

During the compressor in operation, the discharge thermistior will detect discharge gas temperature. The discharge gas temperature is controlled in the following protections.

Discharge temperature protection 1

Discharge temperature becomes more than 221°F(105°C).

The compressor speed -20rps every 120 seconds. If the compressor operates at minimum speed for 120 seconds, and the release condition isn't met, it will be stopped.

When the discharge temperature becomes lower than 212°F(100°C), the compressor returns to the normal operation. If the compressor was stopped by protection, it will restart after 3 minutes ST.

(Fig. 26 : Discharge temperature control)

Discharge temperature

239°F

(115°C)

Comp. speed -20rps every 120 sec.

221°F

(105°C)

158°F

(70°C)

Comp. stop

Release protection 2

Hold

Discharge temperature protection 2

Discharge temperature becomes more than 239°F(115°C).

The compressor is stopped, and it does not restart for 7 minutes.

When the discharge temperature becomes lower than 158°F(70°C), the compressor restarts.

If the

Discharge temperature protection 2 operates 2 times within 24 hours,

discharge temperature error will occur. <Permanent stop>

An error code is displayed each controller, it is reset by only the main power supply reset.

2. COMPRESSOR TEMPERATURE PROTECTION CONTROL

When the compressor temperature thermistor detects more than 233.6°F (112°C).

The compressor is stopped at once.

The compressor temperature becomes lower than 176°F(80°C) after 3 minutes ST.

If the Compressor temperature protection operates 2 times within 24 hours,

discharge temperature error will occur. <Permanent stop>

An error code is displayed each controller, it is reset by only the main power supply reset.

01-30

3. HEAT SINK TEMPERATURE PROTECTION CONTROL

During the compressor in operation, heat sink temperature thermistor (Built-in IPM) will detect heatsink temperature. It is controlled in the following protections. Heat sink protection 1 and 2 operates at the same time, if each conditions are met.

Heatsink temperature protection 1

When the heat sink temperature becomes more than 185°F(85°C).

Outdoor unit fan +1 STEP (rise) every 30 seconds.

When the h

eat sink temperature becomes lower than 176°F(80°C).

and the outdoor fan returns to the normal operation.

Heat sink temperature

(100°C)

Heatsink temperature protection 2

When the heat sink temperature becomes more than 194°F(90°C).

Compressor speed -10rps every 30 seconds. If the compressor operates at minimum speed for 120 seconds, and the release condition isn't met, it will be stopped.

When the h If the compressor was stopped by protection, it will restart after 3 minutes ST.

eat sink temperature becomes lower than 185°F(85°C), the outdoor fan to the normal operation.

(Fig. 27 : Heat sink temperature control)

Comp. stop

212°F

Comp. speed -10rps every 120 sec.

194°F (90°C)

Outdoor unit fan +1 step every 30 sec.

185°F (85°C)

Release protection 2,3

176°F

(80°C)

Release protection 1

Heatsink temperature protection 3

When the heat sink temperature becomes more than 212°F(100°C).

Compressor is stopped

When the h the compressor restarts.

eat sink temperature becomes lower than 185°F(85°C) and after 3 minutes ST,

01-31

4. CURRENT RELEASE CONTROL

The compressor speed is controlled so that the outdoor unit input current does not exceeds the current limit value is decided by the outdoor temperature.

When "ECONOMY OPERATION" or "PEAK CUT OPERATION" are effective, the outdoor unit will operate by lowest current.

When the outdoor unit input current reaches to the control value, the compressor speed

-1rps every 1 second till the release value. Then, if the compressor operates at minimum speed and the input current doesn't reach to the release value, the compressor is stopped.

( Table 23 : Current release operation value / Release value )

Outdoor

Cooling

Dry

Heating

temperature [ Ta ]

122°F(50°C) < Ta

116.6°F(47°C) < Ta < 122°F(50°C)

104°F(40°C) < Ta < 116.6°F(47°C)

104°F(35°C) < Ta < 104°F(40°C)

86°F(30°C) < Ta < 104°F(35°C)

20°F(30°C) < Ta < 86°F(30°C)

50°F(10°C) < Ta < 20°F(30°C)

23°F(-5°C) < Ta < 50°F(10°C)

75.2°F(24°C) < Ta

62.6°F(17°C) < Ta < 75.2°F(24°C)

53.6°F(12°C) < Ta < 62.6°F(17°C)

41°F(5°C) < Ta < 53.6°F(12°C)

30.2°F(-1°C) < Ta < 41°F(5°C)

5°F(-15°C) < Ta < 30.2°F(-1°C)

Ta < 23°F(-5°C)

Ta < 5°F(-15°C)

Normal

17.0 / 16.5

18.0 / 17.5

22.0 / 21.5

26.0 / 25.5

22.0 / 21.5

*20.5 / 20.0 *20.5 / 20.0 *20.5 / 20.0

19.0 / 18.5

26.0 / 25.5

Current value [ A ]

(Conrtol / Release)

Low noise

mode 1

14.0 / 13.5

16.5 / 16.0

17.0 / 16.5

22.0 / 21.5

*20.5 / 20.0 *20.5 / 20.0 *20.5 / 20.0

19.0 / 18.5

26.0 / 25.5

Ta : Outdoor temperature

Low noise

mode 2

13.0 / 12.5

15.0 / 14.5

15.5 / 15.0

17.0 / 16.5

19.0 / 18.5

*20.5 / 20.0 *20.5 / 20.0 *20.5 / 20.0

19.0 / 18.5

26.0 / 25.5

Low noise

mode 3

10.5 / 10.0

12.5 / 12.0

13.0 / 12.5

14.0 / 13.5

16.0 / 15.5

*20.5 / 20.0 *20.5 / 20.0 *20.5 / 20.0

19.0 / 18.5

23.5 / 23.0

*Current value(Control / Release) is different from the operating fan step of the outdoor unit.

(Above case is more than 4 STEP, refer to outdoor unit fan table.)

Cooling

Dry

50°F(10°C) < Ta < 20°F(30°C)

23°F(-5°C) < Ta < 50°F(10°C)

< Ta < 23°F(-5°C)

01-32

STEP 0, 1 : 11.0 / 10.5 STEP 2 : 13.5 / 13.0 STEP 3 : 16.5 / 16.0

5 . HIGH PRESSURE PROTECTION CONTROL

During the compressor in operation, When the discharge high pressure sensor will detect the high pressure sensor. The high pressure is controlled in the following protections.

HIGH PRESSURE PROTECTION 1

During Cooling / Dry mode

When the compressor speed meets following conditions.

( Table 24 : Cooling / Dry high pressure protection control)

High pressure

HP < 451PSI

HP < 551PSI

Release

= =

Cooling

Dry

Compressor speed [rps]

rps < 20

20 < rps < 30

30 < rps

Control

HP > 478PSI

HP > 543PSI HP < 530PSI

HP > 580PSI

The compressor speed -5rps every 60 seconds. If the compressor operates at minimum speed for 60 seconds and the release condition isn't met, it will be stopped.

During Heating mode <Start and Release condition 1>

When the compressor speed meets following conditions.

( Table 25 : Heating high pressure protection control)

High pressure

Heating

Compressor speed [rps]

rps < 20

20 < rps < 90

90 < rps

Control

HP > 478PSI

HP > 507PSI HP < 530PSI

HP > 478PSI

HP < 451PSI

The compressor speed -5rps every 60 seconds. If the compressor operates at minimum speed for 60 seconds.

If the compressor was stopped by protection, it will restart after 3 minutes ST and high pressure is lower than 435PSI.

Release

= =

01-33

HIGH PRESSURE PROTECTION 2

( Fig. 28 : High pressure protection 2 )

High pressure sensor detects more than 594PSI.

High pressure

594PSI

Compressor stop

Compressor is stopped.

When the high pressure sensor detects lower than 435PSI

435PSI

Release of protection

and after 3 minutes ST, the compressor restarts.

HIGH PRESSURE PROTECTION 3

When the pressure switch becomes OFF (Open : more than 609.2 PSI), the compressor is stopped.

Compressor is stopped.

When the pressure switch becomes ON (Close : lower than 464.1 PSI) and after 3 minutes ST, the compressor restarts.

6. LOW PRESSURE PROTECTION CONTROL

Hold

LOW PRESSURE PROTECTION 1 (For Cooling, Dry and Heating mode)

After the compressor operates for 1 minute, and low pressure sensor detects lower than 7.25PSI for 5 minutes.

Compressor is stopped.

Compressor restarts after 3 minutes ST.

( Fig. 29 : Low pressure protection 1 )

Low pressure

7.25PSI

(When continues for 5 minutes)

If the Low pressure protection 1 operates 5 times within 2 hours, Low pressure error will occur. <Permanent stop>

An error code is displayed each controller, it is reset by only the main power supply reset.

LOW PRESSURE PROTECTION 2 (For Heating mode)

The compressor operates for 10 minutes, and low pressure sensor detects lower than 23.2PSI for 1 minute.

( Fig. 30: Low pressure protection 2 )

The compressor speed -5rps every 60 seconds till the release condition. If the compressor operates at minimum speed for 60 seconds, and the release condition isn't met, the compressor is stopped.

Low pressure sensor detects more than 26.0PSI, and after 3 minutes ST.

Low pressure

26.0PSI

Compressor speed -5 every 60 sec.

23.2PSI

(When continues for 1 minutes)

Release protection 1

Compressor stop

Release protection 2

Compressor stop

01-34

LOW PRESSURE PROTECTION 3 (For Cooling / Dry mode)

During the compressor in operation, low pressure sensor detects lower than 21.7PSI.

Main EEV of Branch Box opens untill the release condition.

Low pressure sensor detects more than 24.6PSI. If the compressor stopped, it restarts after 3 minutes ST.

7. ANTIFREEZING CONTROL (Cooling and Dry mode)

To prevent the indoor unit heat exchenger freezing.

When the indoor heat exchanger temperature sensor detects lower than 37.4

Main EEV of branch box is closed.

When indoor heat exchanger becomes more than 44.6

°F(7°C).

Low pressure

24.6PSI

21.7PSI

(Fig. 31 : Low pressure protection 3)

Release protection 3

Hold

Main EEV of Branch Box opens

°F(3°C).

8. EEV FULL CLOSE PROTECTION CONTROL (Heating mode)

Operation condition of EEV is checked from the temperature difference indoor heat exchanger and room temperature.

When all the following conditions are met for the 2 times in a row.

1. During compressor in operation

2. After 20 minutes from compressor start-up.

3. Indoor unit heat exchanger temperature - Room temperature < 8°F( 4°C)

Outdoor unit is stopped and EEV is initialized.

After 3 minutes ST, compressor will restart.

01-35

Hybrid Flex Inverter System

2. TROUBLE SHOOTING

2. TROUBLESHOOTING

2-1 Service maintenance for Hybrid Flex Inverter System

2-1-1 Features

Enhanced installability and maintenance.

1) Multi-room --> Many pipes and lines

2) Branch box --> Pipes and line

3) Increased power supply points --> Outdoor units and branch boxes

- The conditions of each lines are automatically checked.

- Controller in outdoor units.

- 7-segment lamp in outdoor units.

Check operation

- Lines and pipes of branch boxes are automatically checked.

- Check result (Fault and right lines) is shown.

Controller in outdoor units

[Available]

- Cooling and heating test running

- Refrigerant recovery mode

- Local setteing function (Outdoor unit function)

Display in outdoor units

[Available]

- Cooling and heating running condition

- Detail and unit number of error

- Speed of compressor and outdoor fan

- Value detected from sensor

2-1-1 Error code

1) New error codes are adopted.

Lamp flashing, wired remote control, outdoor unit 7-segment (number). Checked by alphabet. Current "EE" --> New "Er"

Shown in wired remote control, temperature setting.

02-01

2) Hybrid Flex Inverter System, error codes

Error code display Defective component Appearance Object person

Indoor unit

Indoor units lamps, flashing of operation and timer lamps. and continuous flashing of economy lamp.

Wired remote control

LCD, 7-segment display

- Indoor unit error

- Abnormal units except indoor units

OPERATION (Green)

TIMER (Orange) ECONOMY (Green)

- End user

- Installer

- Service engineer

Outdoor unit

Four 7-segment lamps on PCB

- Outdoor unit error

- Abnormal units except outdoor units (Indoor

unit, Branch-

box)

Branch box

Four lamps on PCB

- Branch box error, *No exception

2-1-3 Response procedure at error code display

Case1 : End user

Occurrence of an error

Indoor unit lamp is flashing.

Case2 : Service Engineer

Site visit

Check outdoor ‚7-seg to find defectives

LED981

LED982

POWER

ERROR

/ MODE

LED961 LED962

MODE /

SELECT

EXIT

SW932

SW931

ENTER

CHECK

SW933

SW934

LED401 LED402 LED403 LED404 LED405

Amount of errors

- Service engineer

- Installer

Inform object person of the number of flashing.

Indoor unit error (7-seg : E5U1)

Branch box error (7-seg : EJ2U)

Outdoor unit error

02-02

Check indoor unit, Branch Box

Case3 : Error at construction

After performing the below-described work, repairs, inspections etc., always carry out the Check operation. Normal operation will not be possible without performing the Check operation.

1. Things to comfirm before starting the Check operation

To ensure safety, check that the following work, inspections and operations have been completed.

1 Check that all work on the piping connecting the outdoor unit , indoor units and branch box has been completed 2 Check that all work on the wiring connecting the outdoor unit, indoor units and branch box has been completed 3 Is there a gas leakge? (At pipe connections flang connections and brazed areas ) 4 Is the system changed with the specifed volume of refrigera 5 Is a breaker installed at the power supply cable of outdoor unit and every branch boxes? 6 Are the wires connected to the terminals without looseness, and in accorodance with the specifications? 7 Is the 3-way valve of the outdoor unit open?(Gas pipe and liquid pipe) 8 Is power supplied to the crank case heater for more than 12 hours? 9 Has the power supply of the all indoor units turned of

2. Restrictions applicable when performing the Check operation

When the Check run starts, all indoor units connected to the outdoor unit will start to run automatically. During  the Check run, you cannot check the operation of the indoor units separately. After the Check run, check the operation of the indoor units separately in normal operation.

The operable temperature ranges for the Check run are: external temperature -15 to 46ºC(5 to 115°F); room 

rature for cooling 18 to 46ºC(64 to 114°F); room temperature for heating -15 to 37ºC(5 to 98°F).

tempe In the check run, the conditioner will automatically switch between cooling and heating depending on the 

external temperature and internal temperature. If the external temperature or internal temperature is outside the above operable temperature range, wait until the temperature is within the operab

The Check run can be completed within 1 hour, but may take several hours depending on the external and  internal temperature conditions etc.

Please do not conduct the Check run with all the windows in the room closed. Otherwise the room temperature  could get too low or too high.

Depending on the difference of the room temperature of each room, a judgment may be impossible. 

3. Operating procedure for Check run

(1)

Turn power on to the outdoor unit, indoor units and branch boxes. After the displayed number of “8888.” has been turned off, press

the “CHECK” button.(approximately 2 minutes)

{

}

nt?

f?(Remote controller)

le range and then perform the Check run.

7 seg.display

( : On, : Blinking, : Off)

POWER

ERROR (LED982)

MODE (LED981)

(2)

Press and hold the "CHECK" BUTTO for more than 3 seconds.

(3)

The number of connected branch boxes and indoor units will be displayed on the 7 seg. display. Check that the displayed number matches the actual number of connected units. Do not perform the Check run if the displayed number of units is in error. If the Check run was performed with the number of units in error, check the state of the units and then perform the Check run again.

If the displayed number of units matches the installed number,

go to (4) If the displayed number does not match the installed number,

check the following.

Are all the Branch boxes tume Branch boxes are turned on, and go to (4).

d on?

Check that the

Are connection cables connected to all of the indoor units? 

Turn of the power, connect the Connection cable and go to (1).

(4)

Press and hold the "CHECK" button again for more than 3 seconds.

The Check run will start. 

In the Check run, the following items will be checked.

The wiring and piping between the indoor units and the Branch box

Valve opening

To make an enforced stop, press the "MOD



E/EXIT" button. You cannot execute the stop operation using the remote control. To prevent electric shock, close the service panel during the



Check run.

(5) The Check run will stop automatically after allitems are completed.

When an error occurs, consult the following error display items. Correct the error, and carry out the Check run again.

When the error display disappear even the measures fo

are taken, switch on the power again after turning off the

r error

power. When the power is turned on again after turned off, wait approx. 10 minutes and turn on the power again.

02-03

CHECK

(Press and hold for more than 3 seconds.)

CHECK

(currently operating)

(operation has finished normally (without error))

MODE/EXIT

[Example of 7 seg. display]

Number of indoor units

Number of branch boxes

(Press and hold for more than 3 seconds.)

(Press the MODE/EXIT button. “END” has been turned off.)

4. Error display

Error display Error item Contents

7 seg. display LED lamp

(blinking)

( : On, : Blinking, : Off)

Indeterminable The external or room temperature is outside the oper-

ablerange. The air conditioner will temporarily permit normal operation, but the Check run should be carried out again at a later date when the temperatures are within the operable ranges.

(example)

Wiring number error

The number of wirings between indoor unit and branch box is not correct. Turn off all the units, and check number of connected wires. After correcting the error, turn on the power and carry out the Check run again.

Pipe number

error

The number of wirings between indoor unit and branch

box is not correct. Turn off all the units, and check number of connected wires. After correcting the error, turn on the power and carry out the Check run again. If the number of pipes is correct, the internal heat-exchanger thermistor or branch box piping thermistor may have come out of its holder, or a coil may have come out

of an expansion valve. In this case, please contact

Service personnel.

Wiring error A wiring error has occurred.

The location at which the wiring error has been determined will be displayed 7 seg. display. If there are multiple wiring error locations, the display will cycle through the locations. switching every 2 seconds. After performing the following operation, turn off the power and correct the wiring.

Note down the content of the wiring error. Note down the number of blinks of the green LED on

the PCB of the branch box. (The number of blinks indicates the device number of the Branch box)

After correcting the wiring, turn on the power and carry out the Check run again.

unit error

(In the case of the diagram) Connect the connection cable which is connected to the terminal A of Branch box (Primary) to the terminal B on Branch box (Secondary 2).

1: Branch box-

Primary 2: Branch box-Secondary 1 3: Branch box-Secondary 2

a: Branch box-TerminalA b: Branch box-TerminalB c: Branch box-TerminalC

This is a unit error. * For error content, please refer to "11.2. Error display mode".

02-04

2-2 NORMAL OPERATION

2-2-1 Normal status for Indoor Unit Display

Continuous lightingOperation LEDOperation

Continuous lightingTimer LEDTimer

Flashing PatternIndication LampIndication type

Filter Sign

Power Failure

Compulsion Cooling

Defrosting

Oil Recovery

Mode Mismatch

Economy

LED

Operation LED

Timer LED

Operation LEDTest Operation

Timer LED

Operation LED

OFF

21 sec

1 cycle

0.5 sec 0.5 sec

0.5 sec

1 sec

7 sec 2 sec

1 sec

0.8 sec

0.5 sec

1 sec

Maintenance Mode

Operation LED

Timer LED Economy LED

OFF

02-05

1 sec 1 sec

2-2-2 Normal status for Outdoor Unit Display

Indication type 7 Segment LED Pattern

Idling(stop)

Blank

Cooling Mode

"C" OO "L"

Heating Mode

"H" EA "T"

Oil Recovery Operation

"O" IL "R" ECOVERY

Defrost Operation

"D" E "F" ROST

Power Saving Operation

"P" eak "C" ut

Low Noise Operation

"L" OW "N" OISE

Description

During Cooling Mode

During Heating Mode

During Oil Recovery Operation

During Defrost Operation

During Power Saving Operation

During Low Noise Operation

2-2-3. Normal status for Branch Box Display

Green Red

LED401 LED402 LED403 LED404 LED405

The branch box is functioning properly.

Comment

: Lit : Unlit

02-06

2-3 ABNORMAL OPERATION

2-3-1 Error status for Indoor Unit Display

Please refer the flashing pattern as follows. Indoor Unit : ASU7 / 9 / 12 / 18 / 24RLF, AUU9 / 12 / 18RLF , ARU9 / 12 / 18 / 24RLF The OPERATION, TIMER, ECONOMY lamps operate as follows according to the error contents.

Error Contents

Serial Communication Error Wired Remote Controller

Communication Error Check Run Unfinished

Number of Wires and Pipes Error

Indoor Unit Capacity Error

Connected Combination Error Number of Indoor Units Error

Number of Branch boxes Error Indoor Unit Model Information Error

EEPROM Access Abnormal Manual Auto Switch Error

Indoor Room Thermistor Error

Indoor Heat Ex. Thermistor Error

1 times flash

2 times flash

3 times flash

4 times flash

5 times flash

1 times flash

Economy LEDTimer LEDOperation LED

Continuous flash1 times flash1 times flash

Continuous flash2 times flash1 times flash

Continuous flash5 times flash

Continuous flash1 times flash2 times flash

Continuous flash 2 times flash2 times flash

Continuous flash3 times flash

Continuous flash4 times flash

Continuous

Continuous flash

Continuous flash4 times flash 2 times flash

flash2 times flash

Trouble shooting

1, 37 ~ 39

6,7

Indoor Unit Fan Motor Error

Drainage Error Outdoor Unit Model

Information Error Inverter Error

A. F. Voltage Error

Display P.C.B. Communication Error

Discharge Thermistor Error

Compressor Thermistor Error Heat Ex. Liquid Outlet

Thermi

stor Error

Outdoor Thermistor Error

Suction Gas Thermistor Error

Heat Sink Thermistor Error

5 times flash

6 times flash

7 times flash

2 times flash

1 times flash

2 times flash

Continuous flash1 times flash

Continuous flash3 times flash

Continuous flash6 times flash

Continuous flash6 times flash 3 times flash

Continuous flash4 times flash6 times flash

Continuous flash10 times flash

Continuous flash

Continuous flash7 times flash 3 times flash

Continuous flash7 times flash 4 times flash

Continuous flash7 times flash 5 times flash

Continuous flash7 times flash7 times flash

02-07

Error Contents

Sub-Cool Heat Ex.Gas Inlet Thermistor Error

Sub-Cool Heat Ex.Gas Outlet Thermistor Error

8 times flash 2 times flash

Economy LEDTimer LEDOperation LED

Continuous flash

Trouble shooting

23, 24

Liquid Pipe Thermistor Error

Current Sensor Error

Discharge Pressure Sensor Error Suction Pressure Sensor Error High Pressure Switch Error

Over Current Error

Compressor Control Error

Outdoor Unit Fan Motor Error

4 Way Valve Error

Discharge Temp. Error

Compressor Temp. Error

Low Pressure Error

Branch Box Error

8 times flash

9 times flash

10 times flash

13 times flash

3 times flash

7 times flash

3 times flash

5 times flash

2 times flash

Continuous flash

Continuous flash8 times flash 4 times flash

Continuous flash8 times flash 6 times flash

Continuous flash4 times flash9 times flash

Continuous flash5 times flash

Continuous flash

Continuous flash9 times flash 9 times flash

Continuous flash1 times flash10 times flash

Continuous flash

27, 28, 29

1, 40 ~ 45

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

Economy LED

OFF ON

OFF

0.5s 0.5s

0.1s / 0.1s

0.5s 0.5s 0.5s 0.5s

4.0s

02-08

1.0s

3.0s

0.5s 0.5s

1.0s

4.0s

2-3-2 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 DISPLAY

Error code

Faulty unit No. (Remote controller address)

Ex. 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.

<< HOME CONTROLLER >>

ERROR DISPLAY

To show which indoor unit is the error displayed. indoor unit's name and "ERROR" are alternately shown. (0.5s indoor unit's name / 0.5s "ERROR")

Unit number (usually 0) Error code

Ex. Error code display

Ex. Error display

02-09

2-3-3 Error Code List for Simple and Wired Remote Controller

Error Code

1 1

1 2

1 5 2 1 2 2 2 3

2 4

3 2

3 5 4 1 4 2 5 1 5 3 6 2

Error Contents

Serial Communication Error Wired Remote Controller

ommunication Error

Check Run Unfinished Number of Wires and Pipes Error Indoor Unit Capacity Error Connected Combination Error

Number of Indoor Units Error Number of Branch boxes Error

Indoor Unit Model Information Error EEPROM Access Abnormal

Manual Auto Switch Error Indoor Room Thermistor Error Indoor Heat Ex. Thermistor Error Indoor Unit Fan Motor Error Drainage Error Outdoor Unit Model Information Error

Trouble

shooting

1,37 ~ 39

4 5

6, 7

10 11 12

13 14

Error

Code

Error Contents

Sub-Cool Heat Ex.Gas

8 2

Inlet Thermistor

Sub-Cool Heat Ex.Gas Outlet Thermistor Error

8 3 8 4

Liquid Pipe Thermistor Error Current Sensor Error Discharge Pressure Sensor Error

8 6

Suction Pressure Sensor Error High Pressure Switch Error

9 4 9 5 9 7 9 9 A 1 A 3 A 5 J 2 Branch Box Error

Over Current Error Compressor Control Error Outdoor Unit Fan Motor Error 4 Way Valve Error Discharge Temp. Error Compressor Temp. Error Low Pressure Error

Error

Trouble

shooting

23, 24

25 26

27,28,29

30 31 32 33 34 35 36

1,40 ~ 45

6 3 6 A 7 1 7 2 7 3 7 4 7 5 7 7

Inverter Error Display P.C.B. Communication Error Discharge Thermistor Error Compressor Thermistor Error Heat Ex. Liquid Outlet Thermistor Error Outdoor Thermistor Error Suction Gas Thermistor Error Heat Sink Thermistor Error

15 46 17 18 19 20 21 22

02-10

2-3-4 Outdoor Unit Display

LED display

POWER

ERROR

MODE

LED981

LED982

(RED)

(GREEN)

LED961

LED962

Operation button

MODE

SW931

SELECT ENTER

EXIT

SW932 SW933

ERROR transition

Annunciation

POWER MODE LED : on ERROR LED : flashing

CHECK

SW934

POWER

LED981

OFF

0.1sec 0.1sec

ERROR LED982

OFF

"Err." and quantity are alternately shown.

Press the "ENTER" button Press the "ENTER" button

Type of errors

ex : discharge thermistor 1 abnormal ex : indoor unit abnormal

Press the "SELECT" button

display change

When there is more than one error, display is changed by

Press the "SELECT" button

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

02-11

Indication type 7 Segment LED Pattern

Idling(stop)

Blank

Description

Cooling mode

Heating mode

Oil recovery operation

Defrost operation

Power saving operation

Low noise operation

Error display mode (Number of errors occured)

Error display mode (Error code)

Running the vacuum/ pump down mode

End of the function

"C" OO "L"

"H" EA "T"

"O" IL "R" ECOVERY

"D" E "F" ROST

"P" eak "C" ut

"L" OW "N" OISE

ex.

"RUN"

"DONE"

Alternating display

During Cooling mode

During Heating mode

During Oil recovery operation. Refer to 01-25 page for operation.

During Defrost operation. Refer to 01-22 page for operation.

During Power saving operation. Refer to 01-29 page for o

peration.

During Low noise operation. Refer to 01-29 page for operation.

Number of errors occured are displayed. (Ex. Two error codes present.) Refer to 02-11 page for details.

Error codes are displayed. (Ex. Discharge thermistor error) Refer to 02-11 page for details.

Vacuum/ Pump down mode running.

The function is finished normally. (Function is "Test-run start/ stop" and "EEPROM memory clear".)

Performing function failed

Power off

Preparation display

Connected units display (Only for Check run)

Running Check.

End of Check run

Memory clear

Error display for Check run (Wiring number error)

Error display for Check run (Pipe number error)

Error display for Check run (Wiring error)

Indeterminable

"FAIL"

"P" OWER "OFF"

ex.

Number of Branch boxes

"C" HECK "RUN"

"END"

"P" IPE ">" "L" INE

"P" IPE "<" "L" INE

ex.

1st Branch box & terminal

Number of Indoor units

Blinking

2nd Branch box & terminal

Blinking

The function can not be performed.

When "P.oFF" is displayed, turn off the power supplies of all units.

Number of "8888" is displayed for 2 minutes after power on.

Wiring check in Check run is performing.

Check run is finished.

Number "0000" is blinking for 1 minute when the memory is cleared after Check run is finished.

Number of wirings between indoor unit and branch box is n

ot correct.

Number of pipes between indoor unit and branch box is not correct.

Wiring error has occured. (Ex. Connection of Terminal A on the primary BB to Terminal B on secondary 2 BB is wrong.)

The external or room temperature is outside the operating range of Check run.

02-12

2-3-5 Error Code List for Outdoor Unit Display

Error Code

E. 1 1. 3 E. 1 1. 4 E. 1 5. 6 E. 2 1. 2 E. 2 2. 1 E. 2 4. 2 E. 2 4. 3 E. 5 U. 1 E. 6 2. 1 E. 6 3. 1 E. 6 4. 1 E. 7 1. 1 E. 7 2. 1 E. 7 3. 3 E. 7 4. 1 E. 7 5. 1 E. 7 7. 1

Error Contents

Serial communication error Serial communication error Check run unfinished Number of wires and pipes error Indoor unit capacity error Number of indoor units error Number of Branch boxes error Indoor Unit error Outdoor unit model information error Inverter error A.F. voltage error Discharge thermistor error Compressor thermistor error Heat Ex. Liquid outlet thermistor error Outdoor thermistor error Suction gas thermistor error Heat sink thermistor error

Trouble

shooting

1, 37 ~ 39 1, 37 ~ 39

4 6 7

8 ~ 13

14 15 16 17 18 19 20 21 22

Error Code

E. 8 2. 1 E. 8 2. 2 E. 8 3. 1 E. 8 4. 1 E. 8 6. 1 E. 8 6. 3 E. 8 6. 4 E. 9 4. 1 E. 9 5. 1 E. 9 7. 3 E. 9 9. 1 E. A 1. 1 E. A 3. 1 E. A 5. 1 E. J 2. U

Error Contents

Sub cool heat EX. gas inlet thermistor error 23 Sub cool heat EX. gas outlet thermistor error Liquid pipe thermistor error Current sensor error Discharge pressure sensor error Suction pressure sensor error High pressure switch error Over current error Compressor control error Outdoor unit fan motor error 4-way valve error Discharge temp. error Compressor temp. error Low pressure error Branch box error

Trouble

shooting

1,40 ~ 45

24 25 26 27 28 29 30 31 32 33 34 35 36

02-13

2-3-6 Error status for Branch Box Display

When an error occurs, an error description displays in the LED (No.401 - 405).

Lit

(n)

Flashing (number of flashing)

Unlit

Green Red

LED401 LED402 LED403 LED404 LED405

(1) (2)

Branch box

(3)

identifying

display

Primary

unit

(4)

(5)

: (1)

Secondary

unit1

(6)

: (2)

Secondary

(7)

unit2

: (3)

(8)

Comment

Connected combination error

Power frequency error

EEPROM access error Model information error

Serial communication error between Outdoor Unit and branch box

Serial communication error between branch boxe

Serial communication error between branch boxes

Serial communication error between Indoor Unit A and branch box

Serial communication error between Indoor Unit B and branch box

Serial communication error between Indoor Unit C and branch box

Indoor Unit A, liquid pipe thermistor error (CN309)

Indoor Unit B, liquid pipe thermistor error (CN309)

Indoor Unit C, liquid pipe thermistor error (CN310)

Indoor Unit A, gas pipe thermistor error (CN309)

Indoor Unit B, gas pipe thermistor error (CN309)

Indoor U (CN310)

Indoor Unit A, EEV control error (CN305) Indoor Unit B, EEV control error (CN306) Indoor Unit C, EEV control error (CN307)

nit C, gas pipe thermistor error

Trouble shooting

37 38 39 40 41

1 1 1 1 1 1

(9)

02-14

Remote controller communication error

Error Indication Flashing Pattern

Example : "Serial communication error between Indoor Unit B and branch box" at Secondary unit1 (LED401: 2times, LED402: 5times, LED403: Unlit, LED404: Lit, LED405: Unlit)

1 cycle

LED401

OFF ON

LED402

OFF ON

LED403

OFF ON

LED404

OFF ON

LED405

OFF

0.5s + 1.0s0.5s0.5s 0.5s

0.5s 0.5s

0.5s 0.5s 0.5s 0.5s 0.5s 0.5s 0.5s 0.5s + 1.0s

0.5s + 1.0s

02-15

2-4 TROUBLE SHOOTING

Trouble shooting 1 ALL UNIT Error Method:

Serial Communication Error (Serial Forward / Reverse Transfer Error)

Indicate or Display:

Outdoor Unit : Indoor Unit : Refer to Connection line and Serial signal error list (Page 13 )

Error Code :

Detective Actuators: Detective details:

Outdoor Unit Indoor Unit Branch Box (Primary / secondary)

When the branch box cannot properly receive the serial signal from Outdoor unit / Indoor unit / Branch Box. When the Outdoor unit / Indoor unit cannot properly receive the serial signal from Branch Box.

- When power is turn-on : 2 minutes.

- In operation : 15 seconds.

Forecast of Cause:

1. Connection failure 2. External cause 3. Main PCB(Outdoor unit) failure

4. Controller PCB(Indoor unit / Branch Box) failure

Check Point 1-1 : Reset the power and operate

Does error indication reappear?

YESYES

Check Point 2 : Check connection

Check for loose or removed connection line of error.

>> If there is an abnormal condition, correct it by referring to Installation Manual or Design& Technical Manual.

Check connection condition in control unit. (If there is loose connector, open cable or mis-wiring)

Check Point 3 : Check the error unit of indoor unit

Check the which case?

Case 1. When only one indoor unit error Case 2. When more than one indoor unit error Case 3. When all indoor unit error

Case 1. When only one indoor unit error

Check the error display of indoor unit

Replace Controller PCB of indoor unit of error.

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

Check if the ground connection. 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 the error display of each Branch Box(Primary / secondary)

Replace Controller PCB of Branch Box (Primary or Secondary) of error and execute the check operation again.

02-16

Case 2. When more than one indoor unit error (2unit or 3 unit)

Check the error display of each Branch Box (Primary or Secondary)

Replace Controller PCB of Branch Box (Primary or Secondary) of error and execute the check operation again.

Check the error display of Indoor unit

Replace Controller PCB of indoor unit of error

Case 3. When all indoor unit error

Replace Controller PCB

Replace Controller PCB of Branch Box(Primary) and execute the check operation again.

Check the error of Branch Box(Primary)

Check the error of Branch Box(Secondary) or error of Outdoor unit

When Outdoor unit error

Check the error display of Outdoor unit

Replace Main PCB of Outdoor unit and execute the check operation again.

When Branch Box(Secondary) error

Check the error display of each Branch Box(Secondary)

Replace Controller PCB of Branch Box(Secondary) of error and execute the check operation again.

Check Point 1 Check the Outdoor Unit Filter PCB

Check F502 Fuse in Outdoor Unit Filter PCB. >> If Fuse is open, replace F502 Fuse and Main PCB.

When there is no LED display of outdoor unit

Check the LED display of outdoor unit

Check F380 Fuse in Outdoor Unit Inverter PCB. >> If Fuse is open, replace F380 Fuse and Main PCB. If does not improve the symptom, >> Replace F380 Fuse and Main PCB. >> Replace Inverter PCB and Protector P501 of Filter PCB.( If Destruction of IPM or DB) >> Replace Inverter PCB , ACTPM and Protector P501 of Filter PCB.

02-17

Connection Line (example)

Indoorunit1

①

Ａ

Indoorunit2

②

Ａ

Branch Box (Primary)

⑪

Outdoor unit

Serial Forward Transfer Error

⑪

〜

Ｋ

〜

Serial Reverse Transfer Error

Indoorunit3

③

Ｂ

Ｋ

Ｃ

Indoorunit4

⑨

Ｉ

④

Indoorunit5

⑤

Ｄ

Ｅ

Branch Box 1 (secondary)

⑩

Indoorunit6

⑥

Ｆ

Indoorunit7

⑦

Branch Box 2 (secondary)

Ｇ

Indoorunit8

⑧

Ｈ

Serial signal error list

1st 2nd 3rd 1st 2nd 3rd 1st 2nd 3rd 1st 2nd 3rd 1st 2nd 3rd 1st 2n d 3rd 1st 2nd 3rd 1st 2nd 3rd LED401 LED402 LED403 LED404 LED405 LED401 LED402 LED403 LED404 LED405 LED401 LED402 LED403 LED404 LED405 ①⑬②◎---------------------◎(1)◎(5) ● ○ ○ - - - - - - - - - - EJ2U ②---⑬②◎---------- --------◎(1)◎(5) ○ ● ○ - - - - - - - - - - EJ2U ③------⑬②◎---------------◎(1)◎(5) ○ ○ ● - - - - - - - - - - EJ2U ④---------⑬②◎------------ - - - - - ◎(2)◎(5) ● ○ ○ - - - - - EJ2U ⑤------------⑬②◎--------- - - - - - ◎(2)◎(5)

SerialForward TransferError

SerialReverse TransferError

⑥---------------⑬②◎------ - - - - - ◎(2)◎(5) ○ ○ ● - - - - - EJ2U ⑦------------------⑬②◎--- - - - - - - - - - - ◎(3) ◎(5) ● ○ ○ EJ2U ⑧---------------------⑬②◎ - - - - - - - - - - ◎(3) ◎(5) ○ ● ○ EJ2U ⑨ ⑬②◎⑬②◎⑬②◎⑬②◎⑬②◎⑬ ②◎⑬②◎⑬②◎ ◎(1) ◎(4) ○ ○ ○ ◎(2) ◎(4) ○ ○ ○ - - - - - EJ 2U ⑩ ⑬②◎⑬②◎⑬②◎⑬②◎⑬②◎⑬ ②◎⑬②◎⑬②◎ ◎(1) ◎(4) ○ ○ ○ - - - - - ◎(3) ◎(4) ○ ○ ○ E J 2U

⑪ ⑬②◎⑬②

Ａ①①◎------------- --------◎(1)◎(5) ● ○ ○ - - - - - - - - - - E5U1 Ｂ---①①◎------------------◎(1)◎(5) ○ ● ○ - - - - - - - - - - E5U1 Ｃ------①①◎------- --------◎(1)◎(5) ○ ○ ● - - - - - - - - - - E5U1 Ｄ---------①①◎------------ - - - - - ◎(2)◎(5) ● ○ ○ - - - - - E5U1 Ｅ------------①①◎- -------- - - - - - ◎(2)◎(5) ○ ● ○ - - - - - E5U1 Ｆ---------------①①◎------ - - - - - ◎(2)◎(5) ○ ○ ● - - - - - E5U1 Ｇ---------------- --①①◎--- - - - - - - - - - - ◎(3)◎(5) ● ○ ○E5U1 Ｈ---------------- -----①①◎ - - - - - - - - - - ◎(3)◎(5) ○ ● ○E5U1

---------------- -------- - - - - - ● ◎(3) ○ ○ ○ - - - - - ----

Ｉ

⑬②◎⑬②◎⑬②◎⑬②◎⑬②◎⑬ ②◎⑬②◎⑬②◎ - - - - - ◎(2) ◎(4) ○ ○ ○ - - - - - EJ 2U

---------------- -------- - - - - - - - - - - ● ◎(3) ○ ○ ○ ----

Ｊ

⑬②◎⑬②◎⑬②◎⑬②◎⑬②◎⑬ ②◎⑬②◎⑬②◎ - - - - - - - - - - ◎(3) ◎(4) × ○ ○ EJ 2U

①①◎①①◎①①◎①①◎①①◎① ①◎①①◎①①◎ ● ◎(3) ○ ○ ○ ● ◎(3) ○ ○ ○ ● ◎(3) ○ ○ ○ E11 3

Ｋ

⑬②◎⑬②◎⑬②◎⑬②◎⑬②◎⑬ ②◎⑬②◎⑬②◎ ◎(1) ◎(3) ○ ○ ○ - - - - - - - - - - E J 2U

LED Display pattern of Indoor unit

・1st - Operation LED ・2nd - Timer LED ・3rd - Economy LED

・ Number of flashes (0.5sec) ・ Continuous flash ・- No display

Indoorunit 6 Indoorunit 7 Indoorunit 8 BranchBox(Prim ary) BranchBox 1(secondary) Branch Box2(secondary)Indoorunit1 Indoorunit2 Indoorunit3 Indoorunit4 Indoorunit5

○●○ - - - - -EJ2U

----- -◎ ◎(1) ◎(3) ○ ○ ○◎⑬②◎⑬②◎⑬②◎ ⑬ ②◎⑬②◎⑬②

----

Outdoorunit

LED962LED961

E113 E114

LED Display pattern of Branch Box

・

◎(n) -

Flashing(number of flashing)

● -

Lit

・

○ -

Unlit

・

02-18

Trouble shooting 2 INDOOR UNIT Error Meth od:

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, Economy LED Cont i nu o u s F l as h . Error Code : 1 2

Detective Actuators:

Indoor unit controller PCB Wired Remote Controller

Forecast of Cause : 1. Terminal connection abnormal 2. Wired Remote Controller 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 controller and Indoor unit,

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

Check Point 2 : Check Remote controller and Controller PCB

Check terminal voltage of controller PCB Connector. (Power supply for Remote) Cassette / Duct Type CN14 , Wall mount Type CN6 , Small size Wall mount Type CN305(UTY-XCBXZ14)

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

-In case of re-installation is done due to removed connector or incorrect wiring, turn on the power again

ontroller PCB is OK) >>> Replace Remote Controller

Controller PCB and execute the check operation again.

02-19

Trouble shooting 3 INDOOR UNIT Error Method:

Check run unfinished

Indicate or Display:

Outdoor Unit : E. 15. 6 Indoor Unit : Operation LED 1 times Flash, Timer LED 5 Times Flash, Economy LED Cont i nu o u s F l as h . Error Code : 15

Detective Actuators: Detective details:

Outdoor unit Branch BOX

When the operation command is input by remote controller without check operation completion.

Forecast of Cause :

1. Check operation not complete 2. Outdoor Main PCB changed 3. Branch BOX PCB changed

Check Point 1 : Check the indoor unit number connection

Check the number of indoor unit connected.

>> If the check operation not complete, execute it by referring to Installation Manual or Design & Technical Manual. >> Upon correcting incorrect setting, reset the power.

Check Point 2 : Replace Main PCB

Replace Main PCB, and execute the check operation again.

INDOOR UNIT Error Method:

Number of Wires and Pipes Error

Indicate or Display: Outdoor Unit : E.2 1.2 Indoor Unit : Operation LED 2 times Flash, Timer LED 1 Times Flash, Economy LED Cont i nu o u s F l as h . Error Code : 2 1

Detective Actuators: Detective details:

Indoor unit

When the operation command is input by remote controller without check operation completion. When a PCB has been replaced.

Forecast of Cause :

1. Check operation not complete 2. Indoor Controller PCB changed 3. Branch BOX PCB changed

Check Point 1 : Check the indoor unit number connection

Check the number of indoor unit connected.

>> If the check operation not complete, execute it by referring to Installation Manual or Design & Technical Manual. >> Upon correcting incorrect setting, reset the power.

Check Point 2 : Replace Controller PCB

Replace Controller PCB, and execute the check operation again.

02-20

Trouble shooting 4 INDOOR UNIT Error Method:

Indoor Unit Capacity Error

Indicate or Display:

Outdoor Unit : E. 22. 1 Indoor Unit : Operation LED 2 times Flash, Timer LED 2 Times Flash, Economy LED Continuous Flash. Error Code : 22

Detective Actuators: Detective details:

All indoor unit

When the total capacity of indoor units is outside of range between 38,000BTU and 63,000BTU.

Forecast of Cause :

1. The selection of indoor units is incorrect 2. Main PCB(Outdoor unit) failure

Check Point 1 : Check the total capacity of indoor unit

Check the total capacity of the connected indoor units.

>> If abnormal condition is found, correct it by referring to Installation Manual or Design & Technical Manual.

OKOK

Check Point 2 : Replace Main PCB

If Check Point 1 do not improve the symptom, replace Main PCB(Outdoor unit),

and execute the check operation again.

02-21

Trouble shooting 5 INDOOR UNIT Error Method:

Connected Combination Error

Indicate or Display:

Outdoor Unit : E.5 U.1 or E.J 2.U

Indoor Unit : Operation LED 2 times Flash, Timer LED 3 Times Flash, Economy LED Cont i nu o u s F l as h .

Error Code : 2 3

Detective Actuators: Detective details:

Indoor Unit Branch Box

When power is on and one of the below occurs.

1. When the wirring is mistake

2. When the connection outdoor unit different.

3. When the connection indoor unit of unsupported multi.

Forecast of Cause:

1. connections condition in Controller PCB(Indoor unit / Branch Box)

Check Point 1 : Check the Indoor unit / Branch Box

Check the Indoor unit / Branch Box

>> If there is abnormal connect, correct it by referring to Installation Manual or Design & Technical Manual. >> Upon correcting incorrect setting, and execute the check operation again.

02-22

Trouble shooting 6 INDOOR UNIT Error Method:

Number of Indoor Units Error

Indicate or Display:

Outdoor Unit : E. 24. 2 Indoor Unit : Operation LED 2 times Flash, Timer LED 4 Times Flash, Economy LED Continuous Flash. Error Code : 24

Detective Actuators: Detective details:

Indoor Unit

When the total connection number of indoor units is outside of range between 2 and 8.

Forecast of Cause :

1. Indoor unit connection failure

Check Point 1 : Check the indoor unit number connection

Check the indoor unit number connection.

>> If there is an abnormal condition, correct it by referring to Installation Manual or Design & Technical Manual. >> Upon correcting incorrect setting, reset the power.

02-23

Trouble shooting 7 Branch Box Error Method:

Number of Branch Boxes Error

Indicate or Display:

Outdoor Unit : E. 24. 3 Indoor Unit : Operation LED 2 times Flash, Timer LED 4 Times Flash, Economy LED Continuous Flash. Error Code : 24

Detective Actuators: Detective details:

Branch Box

When the number of branch boxes and are different, and the operation command is input to the outdoor unit.

Memorized number at the check operation. Number of Serial forward signal.

Forecast of Cause :

1. Branch box power failure

2. Branch box connection failure

Check Point 1 : Check the Branch box power

Check the Branch Box power

>> If there is an abnormal condition, power turned on.

Check Point 2 : Check the Branch box connection

Check the Branch Box connection.

>> If there is an abnormal condition, correct it by referring to Installation Manual or Design & Technical Manual. >> Upon correcting incorrect setting, reset the power.

02-24

Trouble shooting 8 INDOOR UNIT Error Method:

Indoor Unit Model Information Error EEPROM Access Abnormal

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

Indoor Unit : Operation LED 3 times Flash, Timer LED 2 Times Flash, Economy LED Cont i nu o u s F l a sh .

Error Code : 3 2

Detective Actuators:

Indoor Unit

Forecast of Cause : 1. External cause 2. connections condition in Controller PCB 3. Controller PCB failure

Check Point 1-1 : Reset power supply and operate

Does error indication show reappear?

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

Detective details:

Check Point 2 : Check connections condition in Controller PCB

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

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

Check if the ground connection is proper. 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 Controller PCB

Change Controller PCB and execute the check operation again.

02-25

Trouble shooting 9 INDOOR UNIT Error Method:

Manual Auto Switch Error

Indicate or Display:

Outdoor Unit : No Display Indoor Unit : Operation LED 3 times Flash, Timer LED 2 Times Flash, Economy LED Continuous Flash. Error Code : 3 5

Detective Actuators: Detective details:

Indoor Unit Controller PCB Indicator PCB

When the Manual Auto Switch becomes ON for consecutive 30 or more seconds.

Manual Auto Switch

Forecast of Cause :

1. Manual Auto Switch failure 2. Controller PCB and Indicator PCB failure

Check Point 1 : Check the Manual Auto Switch

Check if Manual Auto Switch is kept pressed. Check ON/OFF switching operation by using a meter.

>> If Manual Auto Switch is disabled (on/off switching), replace it.

OKOK

Check Point 2 : Replace Controller PCB and Indicator PCB

If Check Point 1 do not improve the symptom, replace Controller PCB and Indicator PCB and execute the check operation again.

02-26

Trouble shooting 10 INDOOR UNIT Error Method:

Indoor Room Thermistor Error

Indicate or Display: Outdoor Unit : E.5 U.1 Indoor Unit : Operation LED 4 times Flash, Timer LED 1 Times Flash, Economy LED Cont i nu o u s F l a sh .

Error Code : 4 1

Detective Actuators:

Indoor Unit Controller PCB Circuit Indoor Temperature Thermistor

Forecast of Cause :

1. Connector failure connection 2. Thermistor failure 3. Controller PCB failuer

Detective details:

Indoor unit thermistor is open or short is detected always.

Check Point 1 : Check connection of Connector

Check if connector is loose or removed Check erroneous connection Check if thermisto r 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 (° F )

776859504132

10.012.515.820.125.233.6Resistance Value ( )

Temperature (° F )

122113104

3.54.35.3Resistance Value ( )

8.0

6.5

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 circuit diagram (Connector connection)

CN5

CN7

CN8

121

1 2

11 22

GRAY

BLACK BLACK

H/E (MID) Thermistor

Room Temp. Thermistor

GRAY

Cassette circuit diagram (Connector connection)

GRAY

CN5

CN8

121

11 22

GRAY

BLACK BLACK

H/E (MID) Thermistor

Room Temp. Thermistor

Small size Wall mount circuit diagram(Connector connection)

BLACK

CN4

BLACK

Wall mount Scircuit diagram (Direct soldering to PCB)

RED

CN3

CN1

WHITE

BLACK

H/E Thermistor

Room Temp. Thermistor

BLACK

H/E Thermistor

Room Temp. Thermistor

If the voltage does not appear, replace Controller PCB and execute the check operation again.

02-27

Trouble shooting 11 INDOOR UNIT Error Method:

Indoor Heat Ex. Thermistor Error

Indicate or Display: Outdoor Unit : E.5 U.1 Indoor Unit : Operation LED 4 times Flash, Timer LED 2 Times Flash, Economy LED Cont i nu o u s F l a sh . Error Code : 4 2

Detective Actuators:

Indoor Unit Controller PCB

Detective details:

Indoor unit thermistor is open or short is detected always.

Heat Exchanger (MID) Thermistor

Forecast of Cause :

1. Connector failure connection 2. Thermistor failure 3. Controller PCB failuer

Check Point 1 : Check connection of Connector

Check if connector is loose or removed Check erroneous connection Check if thermisto r 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 (° F ) Resistance Value ( )

Temperature (° F )

122113104

776859504132

49.862.579.1100.9129.8168.6

40.0

32.4

Resistance Value ( )

17.821.226.3

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 circuit diagram (Connector connection)

CN5

CN7

CN8

121

1 2

11 22

GRAY

BLACK BLACK

H/E (MID) Thermistor

Room Temp. Thermistor

GRAY

Cassette circuit diagram (Connector connection)

GRAY

CN5

CN8

121

11 22

GRAY

BLACK BLACK

H/E (MID) Thermistor

Room Temp. Thermistor

Small size Wall mount circuit diagram(Connector connection)

BLACK

CN4

BLACK

Wall mount circuit diagram (Direct soldering to PCB)

RED

CN3

CN1

WHITE

BLACK

H/E Thermistor

Room Temp. Thermistor

BLACK

H/E Thermistor

Room Temp. Thermistor

If the voltage does not appear, replace Controller PCB and execute the check operation again.

02-28

Trouble shooting 12 INDOOR UNIT Error Method:

Indoor Unit Fan Motor Error

Detective Actuators:

Indoor Unit Controller PCB Indoor Fan Motor

Indicate or Display: Outdoor Unit : E.5 U.1 Indoor Unit : Operation LED 5 times Flash, Timer LED 1 Times Flash, Economy LED Cont i nu o u s F l a sh . Error Code : 5 1

Detective details:

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.

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

4. Controller PCB failure

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 : Replace Controller PCB

Change Controller PCB and execute the check operation again.

02-29

Trouble shooting 13 INDOOR UNIT Error Method:

Drainage Error

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

Error Code : 5 3

Detective Actuators:

Indoor Unit Controller PCB Circuit Float Switch

Forecast of Cause : 1. Float switch failure 2. Shorted connector/wire 3. Controller PCB failure

4. Drain pump failure 5. Hose clogging

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 abnormal, replace it.

ON OFF

Check Point 2 : Check Connector (CN 9) / Wire

Check loose contact of CN9 /shorted wire (pinched wire).

>>Replace Float switch if the wire is abnormal

Check Point 3 : Check Drain Hose

Check Drain Hose .

>>If there is Hose clogging. Please clear the clog.

Check Point 4 : Check Controller PCB

If Check Point 1 ~ 3 do not improve the symptom, change

Controller PCB and execute the check operation again.

Attention!!

Wall mount / 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.

02-30

Trouble shooting 14

OUTDOOR UNIT Error Method:

Outdoor Unit Model Information Error

Indicate or Display:

Outdoor Unit : E. 62. 1 Indoor Unit : Operation LED 6 times Flash, Timer LED 2 Times Flash, Economy LED Cont i nu o u s F l a sh . Error Code : 62

Detective Actuators:

Outdoor unit Main PCB

Forecast of Cause :

1. External cause (Noise, temporary open, voltage drop) 2. Main PCB failure

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

Error displayed again?

Detective details:

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

Check Point 1-2 : External cause

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

power line.

YES

Check Point 2 : Replace Main PCB

Change Main PCB, and execute the check operation again.

02-31

Trouble shooting 15

OUTDOOR UNIT Error Method:

Inverter Error

Indicate or Display:

Outdoor Unit : E. 63. 1 Indoor Unit : Operation LED 6 times Flash, Timer LED 3 Times Flash, Economy LED Cont i nu o u s F l a sh . Error Code : 63

Detective Actuators:

Inverter PCB Main PCB Filter PCB

Forecast of Cause :

1. External cause

2. Power supply line & Communication line to Filter PCB to Inverter PCB wiring disconnection, open

3. Inverter PCB failure

4. Main PCB failure

5. Filter PCB failure

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

Error displayed again?

Detective details:

Error information received from Inverter PCB

Check Point 1-2 : External cause

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

power line.

Check Point 2 : Check the wiring (Inverter PCB to Main PCB, Inverter PCB to Filter PCB)

Connector and wiring connection state check Cable open check

Check Point 3 : Replace Inverter PCB

If Check Point 1,2 do not improve the symptom, replace Inverter PCB(Outdoor unit),

and execute the check operation again.

Check Point 4 : Replace Main PCB

If Check Point 3 do not improve the symptom, replace Main PCB(Outdoor unit),

and execute the check operation again.

Check Point 5 : Replace Filter PCB

If Check Point 4 do not improve the symptom, replace Filter PCB(Outdoor unit),

and execute the check operation again.

02-32

Trouble shooting 16 OUTDOOR UNIT Error Method:

A.F Voltage Error

Indicate or Display:

Outdoor Unit : E. 64. 1 Indoor Unit : Operation LED 6 times Flash, Timer LED 4 Times Flash Economy LED Cont i nu o u s F l a sh . Error Code : 64

Detective Actuators: Detective details:

Outdoor Unit Main PCB Outdoor Unit ACTPM PCB

Inverter low voltage protection Inverter overvol

tage protection

Forecast of Cause :

1. Connector connection failure 2. Inverter PCB failure 3. ACTPM failure

Check Point 1 : Check connections condition in control unit

Check if the terminal connection is loose. Check if connector is removed. Check if connector is erroneous connection. Check if cable is open.

>> Upon correcting the removed connector or mis-wiring, reset the power.

Check Point 2 : Check ACTPM

Check ACTPM (PARTS INFORMATION 8).

If ACTPM is abnormal, replace it.

Check Point 3 : Replace Inverter PCB

If Check Point 1,2 do not improve the symptom, replace Inverter PCB, and

execute the check operation again.

02-33

Trouble shooting 17 OUTDOOR UNIT Error Method:

Discharge Thermistor Error

Indicate or Display:

Outdo

or Unit : E. 71. 1 Indoor Unit : Operation LED 7 times Flash, Timer LED Times Flash, Economy LED Cont i nu o u s F l a sh . Error Code : 71

Detective Actuators:

Discharge temperature thermistor

Forecast of Cause :

1. Connector connection failure, open

2. Thermistor failure

3. Main PCB failure

Detective details:

Discharge temperature thermistor short detected Discharge thermistor 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 5".

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

Main PCB (CN62:1-2) voltage value = 5V Remove the thermistor from Main PCB, check the voltage.

THERMISTOR

(COMP SHELL)

THERMISTOR

(DIS.TEMP.)

BLACK

BLACK 1234

1234

CN62

Discharge temperature thermistor (CN62:1-2)

If the voltage does not appear, replace Main PCB,

and execute the check operation again.

02-34

Trouble shooting 18

OUTDOOR UNIT Error Method: Compressor Thermistor Error

Indicate or Display:

Outdoor Unit : E. 72. 1 Indoor Unit : Operation LED 7 times Flash, Timer LED 2 Times Flash, Economy LED Cont i nu o u s F l a sh . Error Code : 72

Detective Actuators:

Compressor temperature thermistor

Forecast of Cause :

1. Connector connection failure, open

2. Thermistor failure

3. Main PCB failure

Detective details:

Compressor temperature thermistor short detected Compressor thermistor 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 14".

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

Main PCB (CN62:3-4) voltage value = 5V Remove the thermistor from Main PCB, check the voltage.

THERMISTOR

(COMP SHELL1)

THERMISTOR

(DIS.TEMP.1)

BLACK

BLACK 1234

1234

CN62

Compressor temperature thermistor (CN62:3-4)

If the voltage does not appear, replace Main PCB

the check operation again.

, and execute

02-35

Trouble shooting 19 OUTDOOR UNIT Error Method:

Heat Ex. Liquid Outlet Temp. Thermistor Error

Indicate or Display:

Outdoor Unit : E. 73. 3 Indoor Unit : Operation LED 7 times Flash, Timer LED 3 Times Flash, Economy LED Cont i nu o u s F l a sh . Error Code : 73

Detective Actuators:

Heat exchanger liquid temperature thermistor

Forecast of Cause :

1. Connector connection defective, open

2. Thermistor failure

3. Main PCB failure

Detective details:

Heat exchanger outlet 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 5".

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

Main PCB (CN63:1-2) voltage value = 5V Remove the thermistor from Main PCB, check the voltage.

THERMISTOR

BLACK 123

123

SC (LP OUT)

THERMISTOR

(HEX. PIPE. OUT.)

BLACK

4 4

CN63

Heat exchanger outlet temperature thermistor (CN63:1-2)

If the voltage does not appear, replace Main PCB

If the voltage does not appear,

the check operation again.

, and execute

02-36

Trouble shooting 20 OUTDOOR UNIT Error Method:

Outdoor Thermistor Error

Indicate or Display:

Outdoor Unit : E. 74. 1 Indoor Unit : Operation LED 7 times Flash, Timer LED 4 Times Flash, Economy LED Cont i nu o u s F l a sh . Error Code : 74

Detective Actuators:

Outdoor temperature thermistor

Forecast of Cause :

1. Connector connection defective, open

2. Thermistor failure

3. Main PCB failure

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 5".

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

Main PCB (CN61:1-3) voltage value = 5V Remove the thermistor from Main PCB, check the voltage.

(OUT TEMP.)

THERMISTOR

BLACK

123 123

CN61

Outdoor temperature thermistor (CN61:1-3)

If the voltage does not appear, replace Main PCB

the check operation again.

, and execute

02-37

Trouble shooting 21

OUTDOOR UNIT Error Method:

Suction Gas Thermistor Error

Indicate or Display:

Outdoor Unit : E. 75. 1 Indoor Unit : Operation LED 7 times Flash, Timer LED 5 Times Flash, Economy LED Cont i nu o u s F l a sh . Error Code : 75

Detective Actuators:

Suction gas temperature thermistor

Forecast of Cause :

1. Connector connection defective, open

2. Thermistor failure3. Main PCB failure

Detective details:

Suction gas 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 5".

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

Main PCB (CN66:1-3) voltage value = 5V Remove the thermistor from Main PCB, check the voltage.

THERMISTOR

(SUC. TEMP)

BLACK

BLACK 1 2 3

1 2 3

CN66

Suction gas temperature thermistor (CN66:1-3)

If the voltage does not appear, replace Main PCB, and execute the check operation.

02-38

Trouble shooting 22

OUTDOOR UNIT Error Method:

Heat Sink Thermistor Error

Indicate or Display:

Outdoor Unit : E. 77. 1 Indoor Unit : Operation LED 7 times Flash, Timer LED 7 Times Flash, Economy LED Cont i nu o u s F l a sh . Error Code : 77

Detective Actuators:

Inverter PCB

Forecast of Cause :

Detective details:

Heat sink temperature thermistor (Built-in IPM) open/short detected

1. Inverter PCB failure

If this error is displayed, replace Inverter PCB

02-39

Trouble shooting 23

OUTDOOR UNIT Error Method:

Sub-cool Heat EX. Gas Inlet Thermistor Error

Indicate or Display:

Outdoor Unit : E. 82. 1 Indoor Unit : Operation LED 8 times Flash, Timer LED 2 Times Flash, Economy LED Cont i nu o u s F l a sh . Error Code : 82

Detective Actuators:

Sub-cooling heat exchanger gas inlet temperature thermistor

Forecast of Cause :

1. Connector connection defective, open

2. Thermistor failure3. Main PCB failure

Detective details:

Sub-cooling heat exchanger gas inlet 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 5".

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

Main PCB (CN65:1-2) voltage value = 5V Remove the thermistor from Main PCB, check the voltage.

THERMISTOR

(SC.OUT.LIQ)

THERMISTOR

(SC.INT.GAS)

BLACK

1234 1

2 34

CN65

Sub-cooling heat exchanger gas inlet thermistor (CN65:1-2)

If the voltage does not appear, replace Main PCB

and execute the check operation again.

02-40

Trouble shooting 24 OUTDOOR UNIT Error Method:

Sub-cool Heat Ex. Gas Outlet Thermistor Error

Indicate or Display:

Outdoor Unit : E. 82. 2 Indoor Unit : Operation LED 8 times Flash, Timer LED 2 Times Flash, Economy LED Cont i nu o u s F l a sh . Error Code : 82

Detective Actuators:

Sub-cooling heat exchanger gas outlet temperture thermistor

Forecast of Cause :

1. Connector connection failur, open

2. Thermistor failure

3. Main PCB failure

Detective details:

Sub-cooling heat exchanger gas outlet temperture 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 5".

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

Main PCB (CN63:4-5) voltage value = 5V Remove the thermistor from Main PCB, check the voltage.

THERMISTOR

BLACK 123

123

(SC. GAS. OUT.)

THERMISTOR

(HEX. PIPE. OUT.)

BLACK

4 4

CN63

Heat exchanger liquid outlet thermistor (CN63:4-5)

If the voltage does not appear, replace Main PCB

and execute the check operation again.

02-41

Trouble shooting 25 OUTDOOR UNIT Error Method:

Liquid Pipe Thermistor Error

Indicate or Display:

Outdoor Unit : E. 83. 1 Indoor Unit : Operation LED 8 times Flash, Timer LED 3 Times Flash, Economy LED Cont i nu o u s F l a sh . Error Code : 83

Detective Actuators:

Heat exchanger liquid outlet thermistor

Forecast of Cause :

1. Connector connection failur, open

2. Thermistor failure

3. Main PCB failure

Detective details:

Heat exchanger liquid pipe 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 5".

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

Main PCB (CN63:1-2) voltage value = 5V Remove the thermistor from Main PCB, check the voltage.

THERMISTOR

BLACK 123

123

(SC. GAS. OUT.)

THERMISTOR

(HEX. PIPE. OUT.)

BLACK

4 4

CN63

Heat exchanger liquid outlet thermistor (CN63:1-2)

If the voltage does not appear, replace Main PCB

and execute the check operation again.

02-42

Trouble shooting 26 OUTDOOR UNIT Error Method:

Current Sensor Error

Indicate or Display:

Outdoor Unit : E. 84. 1 Indoor Unit : Operation LED 8 times Flash, Timer LED 4 Times Flash, Economy LED Cont i n uo u s F l a sh . Error Code : 84

Detective Actuators:

Judgment from value sensed by current sensor (current sensor for inverter) * Current sensor is mounted on Filter PCB

Forecast of Cause :

1. Filter PCB to Inverter PCB CT system wiring connector disconnection, open

2. Filter PCB failure (Power supply section, current sensor section)

3. Inverter PCB failure

Detective details:

When the compressor stops and 30seconds has passed, and the current value from INVERTER is over than 15A, outdoor unit is stopped permanently by protection.

Check Point 1 : Filter PCB to Inverter PCB CT system wiring connection state

Connector and wiring connection state check Cable open check

Check Point 2 : Check Filter PCB and Inverter PCB

If Check Point 1 do not improve the symptom, replace Filter PCB

Check Point 3 : Check Filter PCB and Inverter PCB

If Check Point 2 do not improve the symptom, replace Inverter PCB.

02-43

Trouble shooting 27 OUTDOOR UNIT Error Method:

Discharge Pressure Sensor Error

Indicate or Display:

Outdoor Unit : E. 86. 1 Indoor Unit : Operation LED 8 times Flash, Timer LED 6 Times Flash, Economy LED Cont i nu o u s F l a sh . Error Code : 86

Detective Actuators:

Discharge pressure sensor

Forecast of Cause :

1. Discharge pressure sensor connector disconnection, open

2. Discharge pressure sensor failure3. Main PCB failure

Detective details:

When any of the following conditions is satisfied, a discharge pressure sensor error is generated.

1. 30 seconds or more have elapsed since the outdoor unit power was turned on and pressure sensor detected value 0.3V continued for 30 seconds or more

2. 30 seconds or more have elapsed since the outdoor unit power was turned on and pressure sensor detected value 5.

Check Point 1 : Check the discharge pressure sensor connection state

Connector connection state check Cable open check

Check Point 2 : Check the discharge pressure sensor

Sensor characteristics check * For the characteristics of the discharge pressure sensor, refer to the "Service Parts Information 6".

0V was detected.

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

Main PCB (CN91:1-4) voltage value = 5V Remove the thermistor from Main PCB, check the volt

PRESSURE

SENSOR

(HIGH)

WHITE

BLACK

RED

123

age.

CN91

Discharge pressure sensor (CN91:1-4)

If the voltage does not appear, replace Main PCB

the check operation again.

, and execute

02-44

Trouble shooting 28 OUTDOOR UNIT Error Method:

Suction Pressure Sensor Error

Indicate or Display:

Outdoor Unit : E. 86. 3 Indoor Unit : Operation LED 8 times Flash, Timer LED 6 Times Flash, Economy LED Cont i nu o u s F l a sh . Error Code : 86

Detective Actuators:

Suction pressure sensor

Forecast of Cause :

1. Suction pressure sensor connector disconnection, open

2. Suction pressure sensor failure3. Main PCB failure

Detective details:

When any of the following conditions is satisfied, a suction pressure sensor error is generated.

1. 30 seconds or more have elapsed since the outdoor unit power was turned

on and pressure sensor detected value 0.06V continued for 30 seconds or more.

2. 30 seconds or more have elapsed since the outdoor unit power was turned

on and pressure sensor detected v

Check Point 1 : Check the suction pressure sensor connection state

Connector connection state check Cable open check

Check Point 2 : Check the suction pressure sensor

Sensor characteristics check * For the characteristics of the suction pressure

refer to the "Service Parts Information 6".

sensor,

alue 5.0V was detected.

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

Main PCB (CN92:1-3) voltage value = 5V Remove the thermistor from Main PCB, check the voltage.

PRESSURE

SENSOR

(LOW)

WHITE

RED

BLACK

123

CN92

Suction pressure sensor (CN92:1-3)

If the voltage does not appear, replace Main PCB

the check operation again.

, and execute

02-45

Trouble shooting 29 OUTDOOR UNIT Error Method:

High Pressure Switch Error

Indicate or Display:

Outdoor Unit : E. 86. 4 Indoor Unit : Operation LED 8 times Flash, Timer LED 6 Times Flash, Economy LED Cont i nu o u s F l a sh . Error Code : 86

Detective Actuators:

High pressure switch

Forecast of Cause :

1. High pressure switch connector disconnection, open

2. High pressure switch characteristics failure3. Main PCB failure

Detective details:

When the power was turned on, "high pressure switch : open" was detected.

Check Point 1 : Check the high pressure switch connection state

Connector and wiring connection state check Cable open check

Check Point 2 : Check the high pressure switch characteristics

Switch characteristics check * For the characteristics of high pressure switch, refer to below.

Check Point 3 : Replace Main PCB

Change Main PCB, and execute the check operation again.

Type of contact

Pressure

Characteristics of pressure switch

Contact : Short Open Contact : Open Short

(CN101)

Pressure switch 1

608.7 14.5 PSI

463.8 21.7 PSI

02-46

Trouble shooting 30 OUTDOOR UNIT Error Method:

Over Current Error

Indicate or Display:

Outdoor Unit : E. 94. 1 Indoor Unit : Operation LED 9 times Flash, Timer LED 4 Times Flash, Economy LED Cont i nu o u s F l a sh . Error Code : 94

Detective Actuators:

Inverter PCB

Forecast of Cause :

1. Outdoor unit fan operation defective, foreign matter on hear exchanger, excessive rise of ambient temperature

2. Inverter PCB failure

3. Inverter compressor failure (lock, winding short)

Detective details:

"Protection stop by "overcurrent generation after inverter compressor start processing completed'''' generated consecutively 10 times.

* The number of generations is reset if the start-up of the compre

Check Point 1 : Check the outdoor unit fan operation, heat exchanger, ambient temperature

No obstructions in air passages? Heat exchange fins clogged Outdoor unit fan motor check Ambient temperature not raised by the effect of other heat sources? Discharged air not sucked in?

ssor succeeds.

Check Point 2 : Check the Inverter PCB

Inverter PCB check

Check Point 3 : Replace the Inverter compressor

Inverter compressor replacement

02-47

Trouble shooting 31 OUTDOOR UNIT Error Method:

Compressor Control Error

Indicate or Display:

Outdoor Unit : E. 95. 1 Indoor Unit : Operation LED 9 times Flash, Timer LED 5 Times Flash Economy LED Continuous Flash. Error Code : 95

Detective Actuators: Detective details:

Outdoor Unit Inverter PCBCompressor

When "compressor location detection error" is detected consecutively 5 times, within 40 seconds after start-up. (Compressor location detection becomes over than 90°)

Forecast of Cause :

1. Connector connection failure 2. Inverter PCB failure 3.Compressor failure

Check Point 1 : Check connections condition in control unit

Check if the terminal connection is loose. Check if connector is removed. Check if connector is erroneous connection. Check if cable is open.

>> Upon correcting the removed connector or mis-wiring, reset the power.

Check Point 2 : Check the Inverter PCB to inverter compressor connection state

Wiring connection state check Cable open check

Check Point 3 : Check the Inverter compressor

Inverter compressor check (Refer to Service Parts Information 1. 2)

Check Point 4 : Replace the Inverter PCB

If Check Point 1~3 do not improve the symptom, replace Inverter PCB.

Check Point 5 : Replace the Inverter compressor

If Check Point 4 do not improve the symptom, replace Inverter compressor.

02-48

Trouble shooting 32 OUTDOOR UNIT Error Method:

Outdoor Unit Fan Motor Error

Indicate or Display:

Outdoor Unit : E. 97. 3 Indoor Unit : Operation LED 9 times Flash, Timer LED 7 Times Flash, Economy LED Cont i nu o u s F l a sh . Error Code : 97

Detective Actuators:

Outdoor unit fan motor Outdoor unit Main PCB

Detective details:

When fan speed 100rpm within 20 seconds after fan motor operation issued, fan motor is stopped by protection stop.

When protection repeats 3 times within 60minutes, compressor and fan motor are stopped by protection stop.

* The number of generations is reset if the protection not detects within 60 seconds.

When protection repeats 5 times, compressor and fan motor are stopped by protection stop.

The number of generations is reset if the protection not detects within 60 seconds after protection stop

Forecast of Cause :

1. Rotation obstruction by foreign object

2. Motor wiring, connector disconnected, open

3. Fan motor failure (winding open, lock)

4. Main PCB failure (drive circuit, speed detection circuit)

Check Point 1 : Fan rotation state check

Check for the absence of foreign matter around the fan.

Check Point 2 : Check the motor wiring, connector disconnection, open

Check for motor wiring connector disconnection, open.

Check Point 3 : Fan motor defective

Check if fan can be rotated by hand. Motor winding resistance check(PARTS INFORMATION 7) Motor operation check

Check Point 4 : Check output voltage of Main PCB

Check outdoor unit circuit diagram and the voltage. (Measure at Main PCB side connector 243)

>>1 pin(Red) - 4 pin(Black) DC250V ~ 400V >>4 pin(Black) - 5 pin(White) DC15V 2V

FAN MOTOR

WHITE

BLACK

RED

12 12

If the voltage is not correct, replace Main PCB, and execute the check operation again.

3456 3456

CN243

YELLOW

BLUE

7 7

02-49

Trouble shooting 33 OUTDOOR UNIT Error Method:

4-way valve error

Indicate or Display:

Outdoor Unit : E. 99. 1 Indoor Unit : Operation LED 9 times Flash, Timer LED 9 Times Flash Economy LED Cont i nu o u s F l as h . Error Code : 99

Detective Actuators:

Indoor Unit Controller PCB Circuit Heat Exchanger Temperature Thermistor Room Temperature Thermistor 4-way valve

Detective details:

When the indoor heat exchanger temperature is compared with the room temperature, and either following condition is detected continuously two times, the compressor stops. Cooling or Dry operation [Indoor heat exchanger temp.] - [Room temp.] > 50degF Heating operation [indoor If the same operation is repeated 2 times, the compressor stops permanently.

heat exchanger temp.] - [Room temp.] < -50degF

Forecast of Cause :

1. Connector connection failure 2. Thermistor failure 3. Coil failure 4. 4-way valve failure

5. Main PCB failure

Check Point 1 : Check connection of Connector

Check if connector is removed. Check erroneous connection. Check if thermistor cable is open.

>> Upon correcting the removed connector or mis-wiring, reset the power.

OKOK

Check Point 2 : Check thermistor

Isn’t it fallen off the holder? Is there a cable pinched?

>> Check characteristics of thermistor, If defective, replace the thermistor.

OKOK

Check Point 3 : Check the solenoid coil and 4-way valve

[ Solenoid coil ] Remove CN30 from PCB and check the resistance value of coil. Resistance value is about 1.4k

>> If it is Open or abnormal resistance value, replace Solenoid Coil.

[ 4-way valve ] Check each piping temperature, and the location of the valve by the temperature difference. >> If the value location is not proper, replace 4-way valve.

OKOK

Check Point 4 : Replace Main PCB

If Check Point 1- 3 do not improve the symptom, replace Main PCB,

and execute the check operation again.

02-50

Trouble shooting 34 OUTDOOR UNIT Error Method:

Discharge Temp. Error

Indicate or Display:

Outdoor Unit : E. A1. 1 Indoor Unit : Operation LED 10 times Flash, Timer LED 1 Times Flash, Economy LED Cont i nu o u s F l a sh . Error Code : A1

Detective Actuators:

Detective details:

Discharge temperature thermistor

Forecast of Cause :

1. 3-way valve not opened

2. EEV defective, strainer clogged

3. Outdoor unit operation

4. Discharge temperature thermistor

5. Insufficient refrigerant

Check Point 1 : Check if 3-way valve(gas side) is open.

If the 3-way valve(gas side) was closed, open the 3-way valve(gas side) and check operation.

Check Point 2 : Check the EEV, strainer

EEV (EEV2, indoor unit EEV) open? Strainer clogging check (before and after EEV, ACM oil return) Refer to "Service Parts Information 3, 4 "

"Protection stop by "discharge temperature 239degF during compressor operation'''' generated 2 times within 24 hours.

failure, foreign matter on heat exchanger

failure

Check Point 1 : Check if 3-way valve(liquid side) is open.

If the 3-way valve(liquid side) was closed, open the 3-way valve(liquid side) and check operation.

Check Point 2 : Check the EEV, strainer

EEV (EEV1, EEV2) open? Strainer clogging check (before and after EEV, ACM oil return) Refer to "Service Parts Information 3, 4"

Check Point 3 : Check the outdoor unit fan,heat exchanger

Check for foreign object at heat exchanger Check if fan can be rotated by hand. Motor check(PARTS INFORMATION 7)

Check Point 4 : Check the discharge thermistor

Discharger thermistor characteristics check (Check by disconnecting thermistor from PCB.)

* For the characteristics of the thermistor, refer to the "Service Parts Information 5".

Check Point 5 : Check the refrigerant amount

Leak check

02-51

Trouble shooting 35 OUTDOOR UNIT Error Method:

Compressor Temp. Error

Indicate or Display:

Outdoor Unit : E. A3. 1 Indoor Unit : Operation LED 10 times Flash, Timer LED 3 Times Flash, Econom

y LED Continuous Flash.

Error Code : A3

Detective Actuators:

Detective details:

Compressor temperature thermistor

Forecast of Cause :

1. 3-way valve not opened

2. EEV defective, strainer clogged

3. Outdoor unit operation

4. Compressor temperature thermistor

5. Insufficient refrigerant

Check Point 1 : Check if 3-way valve(gas side) is open.

If the 3-way valve(gas side) was closed, open the 3-way valve(gas side) and check operation.

Check Point 2 : Check the EEV, strainer

EEV (EEV2, indoor unit EEV) open? Strainer clogging check (before and after EEV, ACM oil return) Refer to "Service Parts Information 3, 4".

"Protection stop by "compressor tempreture" 233degF during compressor operation""generated 2 times within 24 hours

failure, foreign matter on heat exchanger

failure

Check Point 1 : Check if 3-way valve(liquid side) is open.

If the 3-way valve(liquid side) was closed, open the 3-way valve(liquid side) and check operation.

Check Point 2 : Check the EEV, strainer

EEV (EEV1, EEV2) open? Strainer clogging check (before and after EEV, ACM oil return) Refer to "Service Parts Information 3,4 ".

Check Point 3 : Outdoor unit fan, heat exchanger chek

Check for foreign object at heat exchanger Check if fan can be rotated by hand. Motor check(PARTS INFORMATION 7)

Check Point 4 : Check the compressor temperature thermistor

Compressor temperature thermistor characteristics check (Check by disconnecting thermistor from PCB)

* For the characteristics of the thermistor, refer to the "Service Par

Check Point 5 : Check the refrigerant amount

Leak check

ts Information 5.

02-52

Trouble shooting 36 OUTDOOR UNIT Error Method:

Low Pressure Error

Indicate or Display:

Outdoor Unit : E. A5. 1 Indoor Unit : Operation LED 10 times Flash, Timer LED 5 Times Flash, Economy LED Cont i nu o u s F l a sh . Error Code : A5

Detective Actuators:

Detective details:

Suction pressure sensor

Forecast of Cause :

1. 3-way valve not opened 2. Outdoor unit ambient temperature too low

3. Outdoor unit fan operation defective, foreign matter at heat exchanger

4. EEV defective, strainer clogged 5. Solenoid valve defective

6. Low pressure sensor characteristics defective 7. Insufficient refrigerant

Check Point 1 : Check if 3-way valve(gas side) is open.

If the 3-way valve(gas side) was closed, open the 3-way valve(gas side) and check operation.

"Protection stop by suction pressure 7.35PSI continued for 5 minutes" repeats 5 times w

ithin 2 hours.

Check Point 1 : Check if 3-way valve(liquid side) is open.

If the 3-way valve(liquid side) was closed, open the 3-way valve(liquid side) and check operation.

Check Point 2 : Check the outdoor unit ambient temperature

Outdoor ambient temperature lower than operating range?

strainer clogging

Indoor unit EEV operation check Strainer not clogged?

Check Point 5 : Check the solenoid valve (SV1)

Solenoid valve operation check

Check Point 6 : Check the suction pressure sensor

Suction pressure sensor characteristics check

* For the characteristics of the suction pressure sensor (PARTS INFORMATION 5)

Check Point 3 : Check the outdoor unit fan operation,

heat exchanger

No foreign oblect in air passage? Heat exchange fins clogged Fan rotates? Outdoor unit fan motor check

Check Point 4 : Check the outdoor unit EEV, strainer clogging

Outdoor unit EEV1 operation check Strainer not clogged?

Refer to "Sevice Parts Information 3"

Check Point 7 : Check the refrigerant amount

Leak check

02-53

Trouble shooting 37 Branch Box Error Method:

Connected combination error

Indicate or Display:

Outdoor Unit : E. 11. 3 Branch Box : LED401/ 402/ 403/ 404/ 405 Lit Indoor Unit : Operation LED 1times Flash, Timer LED 1times Flash,

Economy LED Flashing (0.1s ON / 0.1s OFF) Error Code : 11

Detective Actuators:

Outdoor unit

Forecast of Cause :

1. Connected outdoor unit

Detective details:

When another outdoor unit in the future is connected to the terminal "Outdoor unit" of Primary branch box.

Check Point 1 : Check the outdoor unit

Check the outdoor unit

>> If there is another outdoor unit, correct it by referring to Installation Manual or Design & Technical Manual. >> Upon correcting incorrect setting, reset the power.

02-54

Trouble shooting 38 Branch Box Error Method:

Power frequency error 1

Indicate or Display:

Outdoor Unit : E. 11. 3 or E. 11. 4 Branch Box : LED401/ 402/ 403/ 404 Lit, LED405 Unlit

Indoor Unit : Operation LED 1times Flash, Timer LED 1times Flash, Economy LED Flashing (0.1s ON / 0.1s OFF)

Error Code : 11

Detective Actuators:

Branch Box Controller PCB

Forecast of Cause :

1. Connection failure 2. External cause 3. Controller PCB failure

Detective details:

When 4 continuous failures occurred at Power frequency test. (Power supply of Branch Box)

Check Point 1-1 : Reset the power supply and operate

Does error indication reappear?

YES

Check Point 2 : Check connection

Check Cable/Breaker. Check loose or removed connection.

>> If there is an abnormal condition, correct it by referring to Installation Manual or Design & Technical Manual.

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

Check if the ground connection is proper. 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 : Check the voltage of power supply

Check the voltage of power supply

>> Check if AC187V(AC208V-10%) - 253V(AC230V+10%) appears at Branch Box terminal "Power" L1 - L2.

Check Point 4 : Replace Controller PCB.

If Check Point 1 ~ 3 do not improve the symptom, replace Controller PCB.

02-55

Trouble shooting 39

Branch Box Error Method: Power frequency error 2

Indicate or Display:

Outdoor Unit : E. 11. 3 or E. 11. 4

Branch Box : LED401/ 402/ 403 Lit, LED404 Unlit, LED405 Lit Indoor Unit : Operation LED 1times Flash, Timer LED 1times Flash,

Economy LED Flashing (0.1s ON / 0.1s OFF)

Error Code : 11

Detective Actuators:

Branch Box Controller PCB Outdoor unit Main PCB Outdoor Filter PCB

Forecast of Cause :

1. Connection failure 2. External cause 3. Controller PCB failure 4. Outdoor Main PCB failure

5. Outdoor Filter PCB failure

Detective details:

When 4 continuous failures occurred at Power frequency test. ( Branch Box (Primary) : Power supply for communication to outdoor unit. Branch Box (Secondary) : Power supply for communication to

Check Point 1-1 : Reset the power supply and operate

Does error indication reappear?

YES

Check Point 2 : Check connection

Check Cable/Breaker. Check loose or removed connection.

>> If there is an abnormal condition, correct it by referring to Installation Manual or Design & Technical Manual.

primary branch box.)

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

Check if the ground connection is proper. Check if there is any equipment that causes harmonic wave near the power cable (Neon light bulb or any electronic equipment whic

h causes harmonic wave).

Check Point 3 : Check the voltage of power supply

Check the voltage of power supply [Primary branch box]

>> Check if AC187V(AC208V-10%) - 253V(AC230V+10%) appears at Branch box terminal "Outdoor unit" 1 - 2 (CN105).

If the voltage does not appear, replace Outdoor Filter PCB.

[Secondary branch box]

>> Check if AC187V(AC208V-10%) - 253V(AC230V+10%) appears at Branch box terminal "Branch box" 1 - 2 (CN105).

If the voltage does not appear, replace Branch box controller PCB

02-56

Trouble shooting 40

Branch Box Error Method:

EEPROM access error

Indicate or Display:

Outdoor Unit : E. J2. U Branch Box : LED402 1time Flash, LED403/ 404/ 405 Unlit

Indoor Unit : Operation LED 13times Flash, Timer LED 2times Flash, Economy LED Flashing (0.1s ON / 0.1s OFF)

Error Code : J2

Detective Actuators:

Branch Box Controller PCB

Forecast of Cause :

1. External cause 2. Defective for connection in controller unit 3. Controller PCB failure

Detective details:

When power is on and the access to EEPROM failed.

Check Point 1-1 : Reset power supply and operate

Does error indication show reappear?

YES

Check Point 2 : Check connections condition.

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

Check Point 3 : Replace Controller PCB

If Check Point 1, 2 do not improve the symptom, replace Controller PCB.

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

Check if the ground connection is proper. 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).

02-57

Trouble shooting 41

Branch Box Error Method:

Model information error

Indicate or Display:

Outdoor Unit : E. J2. U Branch Box : LED402 2times Flash, LED403/ 404/ 405 Unlit

Indoor Unit : Operation LED 13times Flash, Timer LED 2times Flash, Economy LED Flashing (0.1s ON / 0.1s OFF)

Error Code : J2

Detective Actuators:

Branch Box Controller PCB

Forecast of Cause :

1. External cause 2. Defective for connection in controller unit 3. Controller PCB failure

Detective details:

When power is on and model information of EEPROM is incorrect.

Check Point 1-1 : Reset power supply and operate

Does error indication show reappear?

YES

Check Point 2 : Check connections condition.

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

Check Point 3 : Replace Controller PCB

If Check Point 1, 2 do not improve the symptom, replace Controller PCB.

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

Check if the ground connection is proper. 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).

02-58

Trouble shooting 42

Branch Box Error Method:

Indoor Unit A, B, C, liquid pipe thermistor error (CN309 / 310)

Indicate or Display:

Outdoor Unit : E. J2. U Branch Box : LED402 6times Flash

(Indoor unit A): LED403 Lit, LED404/ 405 Unlit (Indoor unit B): LED403 Unlit, LED404 Lit, LED405 Unlit (Indoor unit C):

Indoor Unit : Operation LED 13times Flash, Timer LED 2times Flash, Economy LED Flashing (0.1s ON / 0.1s OFF)

Error Code : J2

LED403/ 404 Unlit, LED405 Lit

Detective Actuators:

Branch Box Controller PCB Indoor unit A,B,C Liquid pipe Thermistor

Forecast of Cause :

1. Connection failure 2. Thermistor failure 3. Controller PCB failure

Detective details:

When open or shorted Liquid pipe Thermistor is detected.

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 (°F) Resistance Value (k )

Temperature (°F)

122113104

776859504132

49.862.579.1100.9129.8168.6

40.0

32.4

Resistance Value (k )

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)

Schematic Diagram (Connector connection)

Liquid pipe Thermistor (Unit A) (CN309 Wire:Black) Liquid pipe Thermistor (Unit B) (CN309 Wire:Black) Gas pipe Thermistor (Unit A) (CN309 Wire:Black) Gas pipe Thermistor (Unit B) (CN309 Wire:Black)

Liquid pipe Thermistor (Unit C) (CN310 Wire:Black) Gas pipe Thermistor (Unit C) (CN310 Wire:Black)

If the voltage does not appear, replace Controller PCB .

02-59

Trouble shooting 43

Branch Box Error Method:

Indoor Unit A, B, C, gas pipe thermistor error (CN309 / 310)

Indicate or Display:

Outdoor Unit : E. J2. U Branch Box : LED402 7times Flash

(Indoor unit A): LED403 Lit, LED404/ 405 Unlit (Indoor unit B): LED403 Unlit, LED404 Lit, LED405 Unlit (Indoor unit C):

Indoor Unit : Operation LED 13times Flash, Timer LED 2times Flash, Economy LED Flashing (0.1s ON / 0.1s OFF)

Error Code : J2

LED403/ 404 Unlit, LED405 Lit

Detective Actuators:

Branch Box Controller PCB Circuit Indoor unit A,B,C Gas pipe Thermistor

Forecast of Cause :

1. Connection failure 2. Thermistor failure 3. Controller PCB failure

Detective details:

When open or shorted Liquid pipe Thermistor is detected.

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 (°F) Resistance Value (k )

Temperature (°F)

122113104

776859504132

49.862.579.1100.9129.8168.6

40.0

32.4

Resistance Value (k )

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)

Schematic Diagram (Connector connection)

Liquid pipe Thermistor (Unit A) (CN309 Wire:Black) Liquid pipe Thermistor (Unit B) (CN309 Wire:Black) Gas pipe Thermistor (Unit A) (CN309 Wire:Black) Gas pipe Thermistor (Unit B) (CN309 Wire:Black)

Liquid pipe Thermistor (Unit C) (CN310 Wire:Black) Gas pipe Thermistor (Unit C) (CN310 Wire:Black)

If the voltage does not appear, replace Controller PCB .

02-60

Trouble shooting 44 Branch Box Error Method:

Indoor Unit A, B, C, EEV control error (CN305 / 306 / 307)

Indicate or Display:

Outdoor Unit : E. J2. U Branch Box : LED402 8times Flash

(Indoor unit A): LED403 Lit, LED404/ 405 Unlit (Indoor unit B): LED403 Unlit, LED404 Lit, LED405 Unlit

Indoor Unit : Operation LED 13times Flash, Timer LED 2times Flash, Economy LED Flashing (0.1s ON / 0.1s OFF)

Error Code : J2

(Indoor unit C): LED403/ 404 Unlit, LED405 Lit

Detective Actuators:

Branch Box Controller PCB EEV

Forecast of Cause :

1. Connection failure 2. EEV failure 3. Controller PCB failure

Detective details:

Check Point 1 : Check Connections

Check Connectors (Loose connector or open cable.)

In cooling or dry operation, when the Indoor unit heat exchanger temperature becomes lower than 3degC for 5minutes,the compressor stops and EEV is initialized. After the compressor restarts, if the same protection is repeated within 1hr, the compressor stops permanently.

Check Point 2 : Check Coil of EEV

Remove connector, check each winding resistance of Coil.

Read wire

White - Red Yellow - Red Orange - Red Blue - Red

If Resistance value is abnormal, replace EEV.

Resistance value (68°F)

± 4

Check Point 3 : Check Voltage from Controller PCB

Remove Connector and check Voltage (DC12V).

>> If it does not appear, replace Controller PCB.

02-61

Fujitsu ARU9RLF, ARU12RLF, ARU18RLF, ARU24RLF, AUU9RLF User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual