Fujitsu ASU9RLS2 Service instructions manual

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SPLIT TYPE ROOM AIR CONDITIONER

WALL MOUNTED

INVERTER

SERVICE

INSTRUCTION

Models Indoor unit Outdoor unit

ASU9RLS2 ASU12RLS2 ASU15RLS2

type

AOU9RLS2 AOU12RLS2 AOU15RLS2

R410A

CONTENTS

1. DESCRIPTION OF EACH CONTROL OPERATION

1. COOLING OPERATION................................................................................................

2. HEATING OPERATION.................................................................................................

3. DRY OPERATION.........................................................................................................

4. AUTO CHANGEOVER OPERATION............................................................................

5. INDOOR FAN CONTROL..............................................................................................

6. OUTDOOR FAN CONTROL..........................................................................................

7. LOUVER CONTROL.....................................................................................................

8. COMPRESSOR CONTROL..........................................................................................

9. TIMER OPERATION CONTROL...................................................................................

10. ELECTRONIC EXPANSION VALVE CONTROL........................................................

11. TEST OPERATION CONTROL...................................................................................

12. PREVENT TO RESTART FOR 3 MINUTES ( 3 MINUTES ST ).................................

13. FOUR-WAY VALVE EXTENSION SELECT................................................................

14. AUTO RESTART.........................................................................................................

15. MANUAL AUTO OPERATION ( Indoor unit body operation ).....................................

16. FORCED COOLING OPERATION..............................................................................

17. COMPRESSOR PREHEATING...................................................................................

01-01

01-02

01-03

01-04

01-06

01-07

01-08

01-09

01-12

01-13

01-14

18. MIN.(MINIMUM) HEAT OPERATION.......................................................................... 01-14

19. ECONOMY OPERATION............................................................................................

20. HUMAN SENSOR CONTROL.....................................................................................

21. OUTDOOR UNIT LOW NOISE OPERATION..............................................................

22. POWERFUL OPERATION........................................................................................... 01-15

23. BASE HEATER OPERATION...................................................................................... 01-15

24. DEFROST OPERATION CONTROL........................................................................... 01-16

25. OFF DEFROST OPERATION CONTROL...................................................................

26. VARIOUS PROTECTIONS.......................................................................................... 01-19

01-14

01-15

01-18

2. TROUBLE SHOOTING

2-1 ERROR DISPLAY.......................................................................................................

2-1-1 INDOOR UNIT AND WIRED REMOTE CONTROLLER DISPLAY.....................

2-1-2 WIRED REMOTE CONTROLLER DISPLAY (OPTION).....................................

2-2 TROUBLE SHOOTING WITH ERROR CODE............................................................

2-3 TROUBLE SHOOTING WITH NO ERROR CODE.....................................................

2-4 SERVICE PARTS INFORMATION.............................................................................. 02-30

3. APPENDING DATA

3-1 FUNCTION SETTING.................................................................................................

3-1-1 INDOOR UNIT....................................................................................................

3-1-2 Procedures to change the Function Setting for wireless RC..............................

3-2 Thermistor Resistance Values.....................................................................................

3-2-1 INDOOR UNIT....................................................................................................

3-2-2 OUTDOOR UNIT................................................................................................

4. REPLACEMENT PARTS

02-01

02-02

02-03

02-25

03-01

03-03

03-05

4-1 ASU9/ 12/ 15RLS2.......................................................................................................

4-1-1 PARTS LAYOUT DRAWING...............................................................................

4-1-2 DISASSEMBLY PROCESS.................................................................................

04-01

04-02

WALL MOUNTED type

R410A

INVERTER

1 . DESCRIPTION OF EACH CONTROL OPERATION

1. COOLING OPERATION

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 frequency of the compressor. * If the room temperature is 4°F(2°C) higher than a set temperature, the compressor operation frequency will attain to maximum performance.

* If the room temperature is 5°F(2.5°C) lower than a set temperature, the compressor will be stopped.

* When the room temperature is between +4°F(+2°C) to -5°F(-2.5°C) of the setting temperature, the compressor frequency is controlled within the range shown in Table1. However, the maximum frequency is limited in the range shown in Figure1 based on the fan speed mode and the outdoor temperature.

( Table 1 : Compressor frequency range )

AOU9RLS2 AOU12RLS2 AOU15RLS2

Minimum frequency

10rps 10rps 12rps

Maximum frequency

76rps 76rps 91rps

Maximum frequency

57rps 57rps 59rps

When the compressor operates for 30 minutes continuously at over the maximum frequency , the maximum frequency is changed from Maximum Frequency to Maximum Frequency .

( Fig.1 : Outdoor temperature zone )

Outside air Outside air temperature temperature

93°F

A zone

(34°C)

86°F

B zone

(30°C)

66°F

C zone

(19°C)

50°F

D zone

(10°C)

32°F

E zone

(0°C)

F zone

97°F (36°C)

90°F (32°C)

70°F (21°C)

54°F (12°C)

36°F (2°C)

( Table 2 : Limit of maximum speed based on outdoor temperature )

Indoor fan mode

Me Lo Quiet

44rps

AOU9RLS2

AOU12RLS2

AOU15RLS2

Outdoor temp. zone

A zone 80rps 51rps 43rps 26rps

B zone 80rps 51rps 43rps 26rps

C zone 80rps 51rps 43rps 26rps

D zone 47rps 35rps 29rps 20rps

E zone 47rps 35rps 29rps 20rps

F zone 47rps 35rps 29rps 20rps

A zone 76rps 45rps 37rps 29rps

B zone 76rps 45rps 37rps 29rps

C zone 76rps 45rps 37rps 26rps

D zone 43rps 35rps 26rps 20rps

E zone 51rps 37rps 31rps 22rps

F zone 51rps 37rps 31rps 22rps

A zone 91rps 44rps 34rps 24rps

B zone 91rps 44rps 34rps 24rps

C zone 72rps 34rps 24rps

D zone 52rps 30rps 21rps 18rps

E zone 63rps 34rps 27rps 19rps

F zone 63rps 34rps 27rps 19rps

01-01

2. HEATING OPERATION

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 frequency of the compressor. * If the room temperature is lower by 6°F(3°C) than a set temperature, the compressor operation frequency will attain to maximum performance.

* If the room temperature is higher 5°F(2.5°C) than a set temperatire, the compressor will be stopped.

* When the room temperature is between +5°F(+2.5°C) to -6°F(-3°C) of the setting temperature, the compressor frequency is controlled within the range shown in Table3.

( Table 3 : Compressor frequency range )

Minimum frequency

AOU9RLS2 10rps 119rps

Maximum frequency

AOU12RLS2

AOU15RLS2

10rps

16rps 140rps

119rps

3. DRY OPERATION

The compressor frequency shall change according to the temperature, set temperature, and room temperature variation which the room temperature sensor of the indoor unit body has detected as shown in the Table 4. However, after the compressor is driven, the indoor unit shall run at operation frequency of 51rps (9RLS2), 51rps (12RLS2), 52rps (15RLS2) for 60 seconds.

( Table 4 : Compressor frequency in Dry mode)

AOU 9RLS2

X zone

J zone

Y zone

Operating frequency

26rps

18rps

0rps

AOU 12RLS2

X zone 26rps

J zone

Y zone

Operating frequency

18rps

0rps

AOU 15RLS2

Operating frequency

X zone 24rps

J zone

Y zone

16rps

0rps

( Fig.2 : Compressor Control based on Room Temperature )

Room Room temperature temperature

Ts+3°F (Ts+1.5°C)

Ts-1°F (Ts-0.5°C)

Ts+1°F (Ts+0.5°C)

Ts-3°F

X zone

J zone

(Ts-1.5°C)

Y zone

01-02

4. AUTO CHANGEOVER OPERATION

When the air conditioner is set to the AUTO mode by remote control, operation starts in the optimum mode from among the HEATING, COOLING, DRY and MONITORING modes. 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.

(Fig3 : Operation flow chart)

START

Room temp.

>Ts+4°F(2°C)?

YES

or operation command other than

Room temp.

<Ts- 4°F(2°C)?

HEATING OPERATION

Thermostat remains

in OFF state for 6 minutes or

longer?

System stops

auto changeover operation?

YES

TS : Setting temperature

in OFF state for 6 minutes or

or operation command other than

auto changeover operation?

COOLING OPERATION

Thermostat remains

longer?

System stops

YES

01-03

5. INDOOR FAN CONTROL

1. Fan speed

( Table 5 : Indoor fan speed )

Operation mode Air flow mode

Heating

Cooling/ Fan

Dry

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.

Powerful

Me+

Quiet

Cool air prevention

S-Lo

Powerful

Quiet

Speed (rpm)

ASU9RLS2 ASU12RLS2 ASU15RLS

1470 1370 1260 1180 960 650 610 570 1470 1370 1120 960 650

X zone: 650

J zone: 610

1470 1370 1260 1180 960 650 610 570 1470 1370 1120 960 650

X zone: 650

J zone: 610

1620 1510 1440 1220 1030 790 610 570 1550 1440 1220 980 740

X zone: 740

J zone: 710

3. COOLING OPERATION

Switch the airflow [Auto], and the indoor fan motor will run according to a room temperature, as shown in Figure4. On the other hand, if switched in [Hi] [Quiet], the indoor motor will run at a constant airflow of [Cool] operation modes Quiet, Lo, Me, Hi, as shown in Table 5.

( Fig.4 : Airflow change - over ( Cooling : Auto ) )

TR-Ts > 5°F

(2.5°C)

5°F > TR-Ts > 3°F (2.5°C) (1.5°C)

3°F > TR-Ts (1.5°C)

TR-Ts > 4°F (2°C)

4°F > TR-Ts > 2°F (2°C) (1°C)

2°F > TR-Ts (1°C)

HIGH mode

MED mode

LOW mode

When the room temperature drops

When the room temperature rises

TR : Room temperature Ts : Setting temperature

4. DRY OPERATION

Refer to the Table 5. During the dry mode operation, the fan speed setting can not be changed.

01-04

5. HEATING OPERATION

Switch the airflow [Auto], and the indoor fan motor will run according to a room temperature, as shown in Fig. 5 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, High, as shown in Table 6.

( Fig.5 : Airflow change - over ( Heating : Auto ) )

TR-Ts > -2°F

(-1°C)

-2°F > TR-Ts > -4°F (-1°C) (-2°C)

-4°F > TR-Ts (-2°C)

When the room temperature rises

LOW mode

MED mode

MED+ mode

When the room temperature drops

TR-Ts > -3°F

(-1.5°C)

-3°F > TR-Ts > -5°F (-1.5°C) (-2.5°C)

-5°F > TR-Ts

(-2.5°C)

6. COOL AIR PREVENTION CONTROL (Heating mode)

The maximum value of the indoor fan speed is set as shown in Fig.6 based on the detected temperature by the indoor heat-exchanger sensor on heating mode.

( Fig.6 : Cool air prevension control )

Indoor heat exchanger temperature rises

108°F

(42°C)

102°F

(39°C)

99°F

(37°C)

86°F

(30°C)

Me+

Cool air prevention

S-Lo

Indoor heat exchanger temperature drops

99°F

(37°C)

93°F

(34°C)

90°F

(32°C)

82°F

(28°C)

Indoor heat exchanger temperature rises

108°F

(42°C)

102°F

(39°C)

99°F

(37°C)

86°F

(30°C)

Powerful

Cool air prevention

S-Lo

TR : Room temperature Ts : Setting temperature

Indoor heat exchanger temperature drops

99°F

(37°C)

96°F

(34°C)

90°F

(32°C)

82°F

(28°C)

7. MOISTURE RETURN PREVENTION CONTROL (Cooling mode& Dry mode)

Switch the airflow [Auto] at cooling mode, and the indoor fan motor will run as shown in Fig.7.

( Fig.7 : Indoor fan control )

Compressor

OFF

Indoor fan Setting air flow

Indoor fan (as shown in Table 6)

S-Lo

OFF

10 30 60 180 60 180 60 10 30

( Table 6 : Indoor fan speed )

ASU9 /12RLS2

Dry

X zone J zone

650rpm 610rpm

Y zone

0 570rpm 650rpm

Cooling

(sec)

ASU15RLS2 740rpm 710rpm 0 570rpm 740rpm

01-05

6. OUTDOOR FAN CONTROL

1. Outdoor Fan Motor

Following table shows the type of the outdoor fan motor. The control method is different between AC motor and DC motor.

( Table 7 : Type of Motor )

AC Motor DC Motor

AOU9 / 12 / 15RLS2

2. Fan Speed

( Table 8 : Outdoor fan speed )

Zone

AOU9RLS2

AOU12RLS2

AOU15RLS2

Z F G Y Z F G Y Z F G

Cooling Heating

1050/ 870/ 720/ 590/ 530

870/530/300

300/ 250 250/ 200

1050/ 870/ 720/ 590/ 530

870/530/300

300/ 250 250/ 200

1050/ 870/ 720/ 530

870/ 530/ 300

300

250/ 200

(rpm)

Dry

1100/ 870/ 780/ 720/ 590/ 480 530

1100/ 1000/ 780/ 720/ 590/ 480 530

Refer to Fig.8

( Fig.8 : Outside air temperature zone selection )

Outside air temperature

70°F

(21°C)

54°F

(12°C)

36°F

(2°C)

The outdoor fan speed mentioned above depends on the compressor frequency.

D zone

F zone

G zone

H zone

Outside air temperature

66°F

(19°C)

50°F

(10°C)

32°F

( 0°C)

(When the compressor frequency increases, the outdoor fan speed also changes to the higher speed. When the compressor frequency decreases, the outdoor fan speed also changes to the lower speed.)

After the defrost control is operated on the heating mode, the fan speed keeps at the higher speed

as table 9 without relating to the compressor frequency.

( Table 9 : Outdoor fan speed after the defrost )

AOU9RLS2 1100rpm AOU12RLS2 AOU15RLS2

1100rpm 1100rpm

01-06

7. LOUVER CONTROL

1. VERTICAL LOUVER CONTROL

(Function Range)

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

Types of Air flow Direction Setting:

, , : During Cooling/Dry modes , , , : During Heating

The Remote Controller's display does not change.

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

During AUTO mode operation, for the first a few minutes after beginning operation, air-flow will be horizontal 1; the air direction cannot be adjusted during this period. The air flow direction setting will temporarily become 1 when the temperature of the air -flow is low at the start of the Heating mode.

Air Direction RangeFig.9 :

2. ADJUST THE RIGHT-LEFT LOUVERS

Move the Right-Left louvers to adjust air flow in the direction you prefer.

Right-Left Louvers

Knob (2 places)

2. SWING OPERATION

To select Vertical Airflow Swing Operation

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

(Table10 : Swinging Range)

Range

Cooling / Dry mode Fan mode ( )

g mod

)

(

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

Knob

To select Horizontal Airflow Swing Operation

(No function)

01-07

8. COMPRESSOR CONTROL

1. OPEARTION FREQUENCY RANGE

The operation frequency of the compressor is different based on the operation mode as shown in the Table 11.

(Table 11 : Compressor frequency range)

Cooling / Dry Heating

Minimum Maximum Minimum Maximum

AOU9RLS2

AOU12RLS2 AOU15RLS2

2. OPEARTION FREQUENCY CONTROL AT NORMAL START UP

The compressor frequency soon after the start-up is controlled as shown in the Fig.10

(Fig.10 : Compressor control at start-up)

Frequency Frequency Frequency Frequency Frequency Frequency

10rps

10rps 12rps

76rps 10rps

76rps 91rps

10rps 16rps

119rps

119rps 140rps

(Frequency)

AOU9RLS2 AOU12RLS2 AOU15RLS2

(Time)

AOU9RLS2 AOU12RLS2 AOU15RLS2

Time

Frequency

40rps 57rps 72rps 80rps

40rps 59rps 72rps 80rps

Time

80sec 110sec 140sec

Time Time Time

Frequency

Time Time Time

Frequency Frequency

200sec

Time

Frequency

101rps

Time

Frequency

110rps

Time

410sec350sec

3. LIMITATION OF COMPRESSOR FREQUENCY BY OUTDOOR TEMPERATURE

The minimum compressor frequency is limited by outdoor temperature as shown in the Table12.

(Table12 : Limitation of Compressor Frequency)

[ Cooling/ Dry ]

10°C 14°C 40°C

Under Over Under Over Under Over

AOU9RLS2 AOU12RLS2

[ Heating ]

AOU9RLS2 AOU12RLS2

35rps 18rps 15rps10rps

- 5°C

Under Over Under Over Under Over Under Over

35rps 18rps 10rps 16rps29rps

3°C 7°C 18°C

[ Cooling/ Dry ]

AOU15RLS2

[ Heating ]

AOU15RLS2

0°C 10°C 40°C

Under Over Under Over Under Over

24rps 18rps 16rps12rps

7°C 14°C

Under Over Under Over

24rps 18rps 16rps

01-08

9. TIMER OPEARTION CONTROL

9-1 WIRELESS REMOTE CONTROLLER

The Table 13 shows the available timer setting based on the product model.

( Table 13 : Timer Setting )

ON TIMER / OFF TIMER PROGRAM TIMER SLEEP TIMER

ASU9/ 12/ 15RLS2

1. OPEARTION FREQUENCY RANGE

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

WEEKLY TIMER

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.

SLEEP timer operation cannot be combined with ON timer operation.

Operation mode

Stop mode

01-09

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 8°F(4°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)

Set

30min

Stop of operation

30min

4. 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

01-10

9-2 WIRED REMOTE CONTROLLER (OPTION)

The Table14 shows the available timer setting based on the product model.

( Table14 : Timer Setting )

ON TIMER / OFF TIMER WEEKLY TIMER TEMPERATURE SET BACK TIMER

ASU9/ 12/ 15RLS2

1. ON TIMER / OFF TIMER

Same to 9-1 1.ON TIMER / 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

01-11

10. 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 Table15. The compressor frequency, the detected temperature by the discharge temperature sensor, the indoor heat exchanger sensor, the outdoor heat exchanger sensor, and the outdoor temperature sensor.

( Table15 : The pulse range of the electronic expansion valve control )

Operation mode Pulse range

Cooling / Dry mode

AOU9RLS2 AOU12RLS2

AOU15RLS2

The expansion valve is set at 480 pulses 110seconds after the compressor had stopped.

Initialization will start after 24 hours pass from the last initialization, and the compressor stops At the time of supplying the power to the outdoor unit, the initialization of the electronic

expansion valve is operated (528 pulses are input to the closing direction).

Heating mode

Cooling / Dry mode

Heating mode

Between 60 to 480 pulses.

Between 45 to 480 pulses.

Between 60 to 480 pulses.

11. TEST OPERATION CONTROL

[ Operation method ]

The outdoor unit, may not operate, depending on the room temperature. In this case, keep on pressing the MANUAL AUTO button of the indoor unit for more than 10 seconds. The Operation lamp and Timer lamp will begin to flash simultaneously during cooling test run. Then, heating test run will begin in about 3 minutes when HEAT is selected by the remote control operation. (When the air conditioner is running by pressing the test run button, the Operation lamp and Timer lamp will simultaneously flash slowly.)

[ Release ]

Perform the test operation for 60 minutes. Pressing the MANUAL AUTO button of the indoor unit for more than 3 seconds.

[ Using the Wired remote control (Option) ]

If the Operation lamp is on, press the START/STOP button to turn it off. Press the MODE and the FAN buttons at the same time for more than two seconds to start the test operation. The operation lamp will light up and "o1" will be displayed on the set temperature display.

[ Release ]

Perform the test operation for 60 minutes. Pressing the START/STOP button will stop the test operation.

12. PREVENT TO RESTART FOR 3 MINUTES ( 3 MINUTES ST )

The compressor won't enter operation status for 2 minutes and 20 seconds after the compressor is stopped, even if any operation is given.

13. FOUR-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 four-way valve is switched in 2 minutes and 20 seconds later after the compressor stopped.

01-12

14. 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 started with the memorized operation contents. When the power is interrupted and recovered during timer operation, since the timer operation time is shifted by the time the power was interrupted, an alarm is given by blinking (7 sec ON/2 sec OFF) the indoor unit body timer lamp.

[ Operation contents memorized when the power is interrupted ]

Operation mode Set temperature Set air flow Timer mode and set time (set by wireless remote controller) Set air flow Direction Swing ECONOMY operation 10°C HEAT operationOutdoor low noise operation Human sensor

15. MANUAL AUTO OPERATION (Indoor unit body operation)

When the remote control is lost or battery power dissipated, this function will work without the remote control. When MANUAL AUTO button is set more than 3seconds and less than 10seconds, MANUAL AUTO OPERATION will be started as shown in Table16.To stop operation, press the MANUAL AUTO button for 3seconds.

(Table16 : MANUAL AUTO OPERATION)

Manual auto operation OPERATION MODE Auto changeover FAN CONT. MODE Auto TIMER MODE Continuous SETTING TEMP. 75°F(24°C) SETTING LOUVER Standard

SWING ECONOMY

OFF OFF

(No timer setting available)

Press and hold MANUAL AUTO button for 3 ~ 10seconds

16. FORCED COOLING OPERATION (TEST OPERATION)

When FORCED COOLING OPERATION is set, the operation is controlled as shown in Table17.

( Table17 : FORCED COOLING OPERATION )

Forced cooling operation OPERATION MODE FAN CONT. MODE TIMER MODE

SETTING TEMP. SETTING LOUVER

SWING ECONOMY

Cooling Hi

Room Temp is not controlled Horizontal

(It is changed follow as setting of remote controller) OFF

MANUAL AUTO button

Forced cooling operation is started when press 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 at the same time 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 or pressing MANUAL AUTO button

for 3 seconds.

01-13

17. COMPRESSOR PREHEATING

When the outdoor heat exchanger temperature is lower than 41°F(5°C) and the all operation has been stopped for 30 minutes, power is applied to the compressor and the compressor is heated. (By heating the compressor, warm air is quickly discharged when operation is started.) When operation was started, and when the outdoor heat exchanger temperature rises to 44.6°F(7°C) or greater, preheating is ended.

18. MIN. (MINIMUM) HEAT OPERATION

MIN. HEAT OPERATION performs as below when pressing MIN. HEAT button or Weekly timer setting on the remote controller.

( Table 18 : MIN. HEAT OPERATION )

Mode Heating Setting temperature 50°F(10°C) Fan mode Auto LED display Economy Defrost operation Operate as normal

19. ECONOMY OPERATION

The ECONOMY operation functions by pressing ECONOMY button on the remote controller. At the maximum output, ECONOMY Operation is approximately 70% of normal air conditioner operation for cooling and heating. The ECONOMY operation is almost the same operation as below settings.

( Table 19 )

Mode Cooling/ Dry Heating

Target temperature Setting temp.+2°F(+1°C) Setting temp.-2°F(-1°C)

20 . HUMAN SENSOR CONTROL

The HUMAN SENSOR functions by pressing SENSOR button on the remote controller. When the sensor detects that there is no one in the room for 20 minutes or more, it automatically changes the operation as below settings.

When someone comes back into the room, the human sensor will detect this, and automatically revert to the original settings.

( Table 20 )

Mode Cooling/ Dry Heating

Target temperature Setting temp.+4°F(+2°C) Setting temp.-8°F(-4°C)

( Application range )

Vertical angle 90°(Side view) Horizontal angle 100°(Top view)

6 m

The sensor unit should detect when the human body (estimate: 100cmX30cm) or the object which has more than 39°F(4°C) temp, difference from the background and are crossed with

1.0m/s speed in front of the sensor unit.

90°

6 m

50° 50°

01-14

21. OUTDOOR UNIT LOW NOISE OPERATION

The OUTDOOR UNIT LOW NOISE Operation functions by pressing OUTDOOR UNIT LOW NOISE button on the remote controller. This operation stops the PFC control, and changes the Current release operation/release value. OUTDOOR UNIT LOW NOISE Operation mode can be used during cooling, heating and automatic operation. It can not be used in Fan and Dry mode

( Table 21 )

Control / Release

Current release operation/release value

3.5A / 3.0A

22. POWERFUL OPERATION

The POWERFUL OPERATION functions by pressing POWERFUL button on the remote controller. The indoor unit & outdoor unit will operate at maximum power as shown in Table22.

(Table22)

Powerful operation

COMPRESSOR FREQUENCY Maximum

FAN CONT. MODE Powerful

SETTING LOUVER Cooling/ Dry : 3, Heating : 5

Release Condition is as follows. [Cooling / Dry]

- Room tenperature < Setting temperature -3°F(- 1.5°C) or Operation time has passed 20 minutes.

[Heating]

- Room tenperature > Setting temperature +3.5°F(+1.5°C) or Operation time has passed 20 minutes.

23. BASE HEATER OPERATION

The base heater is operated as shown in Figure 11.

( Fig.11 : Base heater control )

When outdoor temperature drops

OFF

35.6°F (2°C)

When outdoor temperature rises

41°F (5°C)

When the compressor stops, Base heater is OFF. When the outdoor fan motor stops, Base heater is OFF. In the cooling mode, Base heater is OFF. In the defrost operation, Base heater maintains the same status as before the compressor stops.

01-15

24. DEFROST OPERATION CONTROL

1. CONDITION OF STARTING THE DEFROST OPERATION

The defrost operation starts as shown in the following Table 23.

(Table 23 : Condition of starting Defrost Operation)

Normal defrost

Less than 25 minutes (9/12RLS2) Less than 40 minutes (15RLS2)

Compressor integrating operation time

More than 25 minutes (9/12RLS2) More than 40 minutes (15RLS2)

Outdoor heat exchanger temp. < 1.4°F(-17°C) (at outside air temp. > 14°F(-10°C)

Outdoor heat exchanger temp. < Outside air temp.- 44.6°F(7°C) or Outdoor heat exchanger temp. < -13°F(- 25°C) (at outside air temp. < 14°F(-10°C)

Less than 10 minutes ( For intermittent operation )

OFF count of the compressor

40 times

Integrating defrost

Does not operate

Compressor integrating operation time

More than 210 minutes (For continuous operation)

Outdoor heat exchanger

temperature below 26.6°F(-3°C)

If the compressor continuous operation time is less than 10 minutes, the OFF number of the compressor is counted. If any defrost operated, the compressor OFF count is cleared.

2. CONDITION OF THE DEFROST OPERATION COMPLETION

Defrost operation is released when the conditions become as shown in Table 24.

(Table 24 : Defrost Release Condition)

Release Condition

Outdoor heat exchanger temperature sensor value is higher than 60.8°F(16°C) or Compressor operation time has passed 15 minutes.

01-16

3. Defrost Flow Chart

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

Heating operation start : Compressor ON

(Not defrosted for 10 minutes)

Normal defrost

Outside air temp. > 14°F

(-10°C)

Outdoor HEX temp. Below 1.4°F(-17°C)

Outside air temp. < 14°F

(-10°C)

Outdoor HEX temp. < Outside air temp.

-44.6°F(7°C) or Outdoor HEX temp. Below - 25°C

Defrost start

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

Integrating defrost

Intermittent operation Continuous operation

Compressor OFF count : 40 times (Less than 10min.)

Compressor integrating operation: Over 210 min.

Outdoor heat exchanger temperature: Below 26.6°F(-3°C)

Outdoor fan : OFF Compressor speed : 0 rps EEV : 480pulse 4-way valve : OFF Compressor speed : 70rps (9/12RLS2) 80rps (15RLS2)

Outdoor HEX temp.: Over 60.8°F(16°C)

Compressor ON time: Maximum 15 minutes

Defrost end

01-17

25. OFF DEFROST OPEARTION 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, if indoor unit operation lamp flashes slowly (7 sec ON / 2 sec OFF), the outdoor unit will allow the heat exchanger to defrost, and then stop.

1. OFF DEFROST OPERATION CONDITION

In heating operation, the outdoor heat exchanger temperature is less than 24.8°F(- 4°C), compressor continuous operation more than 10 minutes, and compressor operation integrating time lasts for more than 30 minutes.

2. OFF DEFROST END CONDITION

Release Condition

Outdoor heat exchanger temperature sensor value is higher than 60.8°F(16°C) or Compressor operation time has passed 15 minutes.

OFF Defrost Flow Chart

Heating operation stop

Outdoor heat exchanger temperature : Below 24.8°F(- 4°C) Compressor continuous operation : Over 10 minutes Compressor integrating operation : Over 30 minutes

Defrost start

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

Outdoor heat exchanger temperature: Over 60.8°F(16°C) or Compressor ON time: Over 15 minutes

Defrost end

01-18

26. VARIOUS PROTECTIONS

1. DISCHARGE GAS TEMPERATURE OVERRISE PREVENSION CONTROL

The discharge gas thermosensor (discharge thermistor : Outdoor side) will detect discharge gas temperature.

When the discharge temperature becomes higher than Temperature , the compressor frequency is decreased 20rps, and it continues to decrease the frequency for 20rps every 120 seconds until the temperature becomes lower than Temperature .

When the discharge temperature becomes lower than Temperature , the protection control of the compressor frequency will be released. When the discharge temperature becomes higher than Temperature , the compressor is stopped and the indoor unit LED starts blinking.

( Table 25 : Discharge temperature over rise prevension control / Release temperature )

Temperature

219.2°F (104°C)

Temperature

213.8°F (101°C)

Temperature

230°F (110°C)

2. CURRENT RELEASE CONTROL

The compressor frequency is controlled so that the outdoor unit input current does not exceed the current limit value that was set up with the outdoor temperature. The compressor frequency returns to the designated frequency of the indoor unit at the time when the frequency becomes lower than the release value.

( Table 26 : Current release operation value / Release value )

[ Heating ]

AOU9 / 12RLS2 AOU15RLS2

OT (Control / Release)

41°F (5°C)

7.0A / 6.5A

9.0A / 8.5A

10.0A / 9.5A

62.6°F (17°C)

53.6°F (12°C)

OT : Outdoor Temperature

[ Heating ]

OT (Control / Release)

62.6°F (17°C)

53.6°F (12°C)

41°F (5°C)

OT : Outdoor Temperature

7.0A / 6.5A

9.0A / 8.5A

11.0A / 10.5A

13.0A / 12.5A

[ Cooling ]

AOU9 / 12RLS2 AOU15RLS2

OT (Control / Release)

114.8°F (46°C)

104°F (40°C)

OT : Outdoor Temperature

4.5A / 4.0A

6.0A / 5.5A

8.5A / 8.0A

[ Cooling ]

OT (Control / Release)

114.8°F (46°C)

104°F (40°C)

OT : Outdoor Temperature

4.5A / 4.0A

6.0A / 5.5A

9.0A / 8.5A

01-19

3. ANTIFREEZING CONTROL (Cooling and Dry mode)

The compressor frequency is decrease on cooling & dry mode when the indoor heat exchanger temperature sensor detects the temperature lower than Temperature . Then, the anti-freezing control is released when it becomes higher than Temperature .

(Table 27 : Anti-freezing Protection Operation / Release Temperature)

Outdoor temperature

Over than 10°C *2 or 12°C *1

Less than 10°C *2 or 12°C *1

Temperature Temperature

44.6°F

39.2°F (4°C)

(7°C)

55.4°F (13°C)

*1. When the temperature rises. *2. When the temperature drops.

4. COOLING PRESSURE OVERRISE PROTECTION

When the outdoor unit heat exchange sensor temperature rises to 152.6°F(67°C) or greater, the compressor and the outdoor fan motor are stopped and trouble display is performed.

5. HIGH TEMPERATURE RELEASE CONTROL ( HEATING MODE )

On heating mode, the compressor frequency is controlled as following based on the detection value of the indoor heat exchanger temperature sensor.

[ Control System ]

Indoor heat exchange temperature rises

145.4°F (63°C)

131°F (55°C)

127.4°F (53°C)

Compressor is stopped

The compressor frequency is decreased 25rps every 120seconds.

The compressor frequency is decreased 3rps every 60seconds.

Stable zone

It returns to the normal operation

122°F (50°C)

Indoor heat exchange temperature drops

01-20

WALL MOUNTED type

R410A

INVERTER

2 . TROUBLE SHOOTING

2. TROUBLESHOOTING

2-1 ERROR DISPLAY

2-1-1 INDOOR UNIT AND WIRED REMOTE CONTROLLER DISPLAY

Please refer the flashing pattern as follows.

The OPERATION, TIMER and ECONOMY lamps operate as follows according to the error contents.

Error Contents

Serial communication error

Wired remote controller communication error

Indoor unit model information error EEPROM access abnormal

Manual auto switch error

Indoor room thermistor error

Indoor heat Ex.(Pipe) thermistor error

Indoor unit fan motor error

Intake grille error

Outdoor unit main PCB error

PFC circuit error (9 / 12RLS2) Active filter error (15RLS2)

Indoor Unit Display

OPERATION TIMER

(Green)

3 times

4 times

6 times

[ ]

(Orange)

5 times

1 times

2 times6 times

4 times

[ ]

ECONOMY

(Green)

Continuous1 times1 times

Continuous2 times1 times

Continuous2 times

Continuous

Continuous4 times 2 times

Continuous1 times5 times

Continuous8 times5 times

Continuous

Wired Remote Controller

[ ]

Display

Trouble shooting

IPM error

Discharge thermistor error

Heat Ex. (Pipe) thermistor error

Outdoor thermistor error

Current sensor error

Over current error

Compressor control error

Outdoor unit fan motor error

4 Way valve error

Discharge temp. error

5 times6 times

7 times

7 times 3 times

7 times 4 times

9 times

9 times 9 times

1 times

4 times9 times

5 times

7 times

1 times10 times

Continuous

Continuous8 times 4 times

Continuous

02-01

2-1-2 WIRED REMOTE CONTROLLER DISPLAY (OPTION)

1. SELF - DIAGNOSIS

When " Er " in Temperature Display is displayed, inspection of the air conditioning system is necessary. Please consult authoilzed servise personnel.

Unit number (usually 0)

Error code

SU MOTU WETHFR SA

ex. Self-diagnosis check

2. ERROR CODE HISTORY DISPLAY

Up to 16 memorized error codes may be displayed for the indoor unit connected to the remote controller.

1. Stop the air conditioner operation.

2. Press the SET TEMPERATURE buttons , simultaneously for 3 seconds or more to start the self-diagnosis.

Error code

Error history number

SU MOTU WETH FR SA

3. Press the SET TEMPERATURE button to select the error history number.

Lower

0 1 2 3 4 5 6 7

F E d c b A 9 8

Raise



4. Press the SET TEMPERATURE buttons , simultaneously for 3 seconds or more or there is no key input for 60 seconds to stop the display.

02-02

2-2 TROUBLE SHOOTING WITH ERROR CODE

Trouble shooting 1-1

Indicate or Display:

OUTDOOR UNIT Error Method:

Serial communication error

Refer to error code table.

(Serial Reverse Transfer Error)

Detective Actuators:

Outdoor unit Main PCB Outdoor unit fan motor

Detective details:

When the indoor unit cannot receive the serial signal from Outdoor unit more than 2minutes after power ON, or the indoor unit cannot receive the serial signal more than 15seconds during normal operation.

Forecast of Cause:

1. Connection failure 2. External cause 3. Main PCB failure 4. Outdoor unit fan motor failure

Check Point 1-1 : Reset the power and operate

Does Error indication show again?

YESYES

Check Point 2 : Check Connection

Check any loose or removed connection line of Indoor unit and Outdoor unit.

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

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

Check the complete insulation of the grounding.

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

Check Point 3 : Check the voltage of power supply

Check the voltage of power supply

>> Check if AC187V (AC208V -10%) - 253V (AC230V +10%) appears at Outdoor Unit Terminal L - N.

Check Point 4 : Check Serial Signal (Reverse Transfer Signal)

Check Serial Signal (Reverse Transfer Signal)

>> Check if Indicated value swings between AC70V and AC130V at Outdoor Unit Terminal 1 - 3.

>> If it is abnormal, Check Outdoor unit fan motor. (PARTS INFORMATION 5)

>> If Outdoor fan motor is abnormal, replace Outdoor unit fan motor and Main PCB.

>> If Outdoor fan motor is normal, replace Main PCB.

GREEN

WHITE

BLACK

RED

WHITE

BLACK

02-03

Trouble shooting 1-2

INDOOR UNIT Error Method:

Serial communication error (Serial Forward Transfer Error)

Indicate or Display:

Refer to error code table.

Detective Actuators:

Indoor unit Controller PCB Indoor unit Fan motor

Detective details:

When the outdoor unit cannot receive the serial signal from Indoor unit more than 10seconds.

Forecast of Cause:

1. Connection failure 2. External cause 3. Controller PCB failure 4. Indoor unit fan motor failure

Check Point 1-1 : Reset the power and operate

Does Error indication show again?

YESYES

Check Point 2 : Check Connection

Check any loose or removed connection line of Indoor unit and Outdoor unit.

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

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

Check the complete insulation of the grounding.

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

Check Point 3 : Check the voltage of power supply

Check the voltage of power supply

>> Check if AC187V (AC208V -10%) - 253V (AC230V +10%) appears at Outdoor Unit Terminal L - N

Check Point 4 : Check Serial Signal (Reverse Transfer Signal)

Check Serial Signal (Forward Transfer Signal)

>> Check if Indicated value swings between AC70V and AC130V at Outdoor Unit Terminal 2 - 3.

>> If it is abnormal, replace Controller PCB.

>> If it is abnormal, Check Indoor unit fan motor. (PARTS INFORMATION 4)

>> If Indoor unit fan motor is abnormal, replace Indoor unit fan motor and Controller PCB.

GREEN

WHITE

BLACK

RED

WHITE

BLACK

02-04

Trouble shooting 2

INDOOR UNIT Error Method:

Wired remote controller communication error

Indicate or Display:

Refer to error code table.

Detective Actuators:

Indoor unit Controller PCB Wired remote control

Detective details:

When the indoor unit cannot receive the signal from Wired Remote Control more than 1minute during normal operation.

Forecast of Cause:

1. Terminal connection abnormal 2. Wired remote control failure 3. Controller PCB failure

Check Point 1 : Check the connection of terminal

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

Check the connection of terminal between remote control and Indoor unit, and check if there is a disconnection of the cable.

OKOK

Check Point 2 : Check Remote Control and Controller PCB

Check Voltage at CNC01 (terminal 1-3) of UTY-TWBXF(Communication kit). (Power supply to Remote Control)

>> If it is DC13V, Remote Control is failure. (Controller PCB is normal) >> Replace Remote Control >> If it is DC 0V, Controller PCB is failure. (Check Remote Control once again) >> Replace Controller PCB

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

02-05

Trouble shooting 3 INDOOR UNIT Error Method:

Indoor unit model information error EEPROM access abnormal

Indicate or Display:

Refer to error code table.

Detective Actuators:

Indoor unit Controller PCB

Detective details:

When power is on and there is some below case.

1. When model information of EEPROM is incorrect.

2. When the access to EEPROM failed.

Forecast of Cause:

1. External cause 2. Defective connection of electric components 3. Controller PCB failure

Check Point 1-1 : Reset Power Supply and operate

Does Error indication show again?

YESYES

Check Point 2 : Check Indoor unit electric components

Check all connectors. (loose connector or incorrect wiring)

Check any shortage or corrosion on PCB.

Check Point 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.

Note : EEPROM

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

02-06

Trouble shooting 4 INDOOR UNIT Error Method:

INDOOR UNIT

Manual auto switch error

Indicate or Display:

Refer to error code table.

Detective Actuators:

Indoor unit Controller PCB Indicator PCB

Detective details:

When the Manual Auto Switch becomes ON for consecutive 60 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

If Check Point 1 do not improve the symptom, change Controller PCB and Indicator PCB.

02-07

Trouble shooting 5 INDOOR UNIT Error Method:

INDOOR UNIT

Indoor room thermistor error

Indicate or Display:

Refer to error code table.

Detective Actuators:

Indoor unit Controller PCB

Detective details:

When Room Temperature Thermistor open or short-circuit is detected.

Room temperature thermistor

Forecast of Cause :

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

Check Point 2 : Check Point 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Approx. value)

Temperature (°F)

77°F 68°F59°F50°F41°F32°F23°C14°F

10.012.515.820.225.933.644.058.2Resistance Value (k )

Temperature (°F)

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

104°F

5.36.58.0Resistance Value (k )

113°F95°F86°F

4.4

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

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

THERMISTOR (PIPE)

THERMISTOR (ROOM TEMP.)

If the voltage does not appear, replace Controller PCB.

BLACK BLACK BLACK BLACK

CN4

02-08

Trouble shooting 6 INDOOR UNIT Error Method:

INDOOR UNIT

Indoor heat Ex.(Pipe) thermistor error

Indicate or Display:

Refer to error code table.

Detective Actuators:

Indoor unit Controller PCB

Detective details:

When Heat Ex. Temperature Thermistor open or short-circuit is detected.

Heat Ex. temperature thermistor

Forecast of Cause :

1. Connector connection failure 2.Thermistor failure 3. Controller 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 Point 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Approx. value)

Temperature (°F)

68°F50°F41°F32°F23°F14°F

62.9103.3134.2176.0233.2312.3Resistance Value (k )

Temperature (°F)

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

122°F

17.125.639.6Resistance Value (k )

140°F

11.6

144°F104°F86°F

10.4

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

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

THERMISTOR (PIPE)

THERMISTOR (ROOM TEMP.)

If the voltage does not appear, replace Controller PCB.

BLACK BLACK BLACK BLACK

CN4

02-09

Trouble shooting 7 INDOOR UNIT Error Method:

Indoor unit fan motor error

Indicate or Display:

Refer to error code table.

Detective Actuators:

Indoor unit Controller PCB Indoor unit Fan motor

Detective details:

When the condition that actual frequency of Indoor Fan is below 1/3 of target frequency is continued more than 56 seconds.

Forecast of Cause:

1. Fan rotation failure 2. Fan motor winding open 3. Motor protection by surrounding temperature rise

4. Control PCB failure 5. Indoor unit fan motor 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 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 3 : Check Indoor unit fan motor

Check Indoor unit fan motor. (PARTS INFORMATION 4)

>>If Indoor unit fan motor is abnormal, replace Indoor unit fan motor.

Check Point 4 : Replace Controller PCB

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

02-10

Trouble shooting 8 INDOOR UNIT Error Method:

INDOOR UNIT

Intake grille error

Indicate or Display:

Refer to error code table.

Detective Actuators:

Indoor unit Controller PCB

Detective details:

When the Micro switch is detected open while running the compressor.

Micro switch

Forecast of Cause :

1. Micro switch failure 2. Shorted connector/ wire 3.Controller PCB failure

Check Point 1 : Check Limit switch

Check operation of Micro switch. (any blocking by dust, etc.) Remove Micro switch and check ON/OFF switching operation by using a meter.

>>If Micro switch is detective, replace it.

OKOK

Check Point 2 : Check Point 2 : Check Connector (CN11) / Wire

Check loose contact of CN11 /shorted wire (pinched wire).

>>Replace Micro switch if the wire is abnormal

OKOK

Check Point 3 : Replace Controller PCB

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

02-11

Trouble shooting 9 OUTDOOR UNIT Error Method:

Outdoor unit main PCB error

Indicate or Display:

Refer to error code table.

Detective Actuators:

Outdoor unit Main PCB

Detective details:

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

Forecast of Cause:

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

Check Point 1-1 : Reset Power Supply and operate

Does Error indication show again?

YESYES

Check Point 2 : Replace Main PCB

Change Main PCB.

Check Point 1-2 : Check external cause

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

02-12

For AOU9 / 12RLS2

Trouble shooting 10-1 OUTDOOR UNIT Error Method:

INDOOR UNIT

PFC circuit error

Detective Actuators:

Outdoor unit Main PCB

Indicate or Display:

Refer to error code table.

Detective details:

When inverter output DC voltage is higher than 415V for over 3 seconds, the compressor stops. If the same operation is repeated 5 times, the compressor stops permanently.

Forecast of Cause :

1. External cause 2. Connector connection failure 3. Main PCB failure

Check Point 1 : Check external cause at Indoor and Outdoor (Voltage drop or Noise)

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

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

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

OKOK

Check Point 2 : Check connection of Connector

Check if connector is removed.

Check erroneous connection. Check if cable is open.

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

OKOK

Check Point 3 : Replace Main PCB

If Check Point 1, 2 do not improve the symptom, change Main PCB.

02-13

For AOU15RLS2

Trouble shooting 10-2 OUTDOOR UNIT Error Method:

INDOOR UNIT

Active filter error

Detective Actuators:

Outdoor unit Main PCB Active filter module

Indicate or Display:

Refer to error code table.

Detective details:

When inverter input DC voltage is higher than 425V or lower than 80V. When a momentary power cut off occurred on low voltage

Forecast of Cause :

1. External cause 2. Connector connection failure 3. Main PCB failure 4. Active filter module failure

Check Point 1 : Check external cause at Indoor and Outdoor (Voltage drop or Noise)

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

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

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

OKOK

Check Point 2 : Check connection of Connector

Check if connector is removed.

Check erroneous connection. Check if cable is open.

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

OKOK

Check Point 3 : Check Active filter module

Check Active filter module. (PARTS INFORMATION 6)

>>If Active filter module is abnormal, replace it.

OKOK

Check Point 4 : Replace Main PCB

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

02-14

Trouble shooting 11

OUTDOOR UNIT Error Method:

IPM error

Indicate or Display:

Refer to error code table.

Detective Actuators:

Outdoor unit Main PCB Outdoor unit Transistor PCB (14L) Compressor

Detective details:

When more than normal operating current to IPM in Main PCB flows, the compressor stops. After the compressor restarts, if the same operation is repeated within 40sec, the compressor stops again. If and repeats 5 times, the compressor stops permanently.

Forecast of Cause :

1. Defective connection of electric components 2. Outdoor Fan Operation failure

3. Outdoor Heat Exchanger clogged 4. Compressor failure

5. Main PCB failure 6. Transistor PCB failure (For AOU15RLS2)

Check Point 1 : Check connections of Outdoor Unit Electrical Components

Check if the terminal connection is loose. Check if connector is removed.

Check erroneous connection. Check if cable is open.

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

Check Point 2 : Check Outdoor Fan, Heat Exchanger

Is there anything obstructing the air distribution circuit? Is there any clogging of Outdoor Heat Exchanger?

Is the Fan rotating by hand when operation is off ?

>> If the Fan Motor is locked, replace it.

Check Point 3 : Check Outdoor Fan

Check Outdoor Fan Motor. (Refer to Trouble shooting 18)

>> If the Fan Motor is failure, replace it.

OKOK

Check Point 4 : Check Compressor

Check Compressor.

(PARTS INFORMATION 2)

OKOK

Check Point 5 : Check Transistor PCB (For AOU15RLS2)

Check Transistor PCB.

(PARTS INFORMATION 7)

OKOK

Check Point 6 : Replace Main PCB

If Check Point 1 5 do not improve the symptom, change Main PCB.

02-15

Trouble shooting 12 OUTDOOR UNIT Error Method:

INDOOR UNIT

Discharge thermistor error

Indicate or Display:

Refer to error code table.

Detective Actuators:

Outdoor unit Main PCB Discharge pipe temperature thermistor

Detective details:

When Discharge pipe temperature thermistor open or short-circuit is detected at power ON or while running the compressor.

Forecast of Cause :

1. Connector connection failure 2.Thermistor failure 3. 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 Point 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Approx. value)

Temperature (°F)

41°F32°F23°F14°F

68°F50°F

62.5100.9129.8168.6221.1292.9Resistance Value (k )

86°F

40.0

104°F

26.3

122°F

17.8

Temperature (°F)

140°F

12.3

194°F176°F158°F

212°F

230°F

2.6

248°F

2.03.44.66.38.7Resistance Value (k )

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

OKOK

Check Point 3 :

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

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

AOU9 / 12RLS2

THERMISTOR (PIPE)

THERMISTOR (DISCHARGE)

THERMISTOR (OUTDOOR)

BLACK

BLACK BROWN BROWN

BLACK

CN71

CN70

AOU15RLS2

THERMISTOR (PIPE)

THERMISTOR (DISCHARGE)

THERMISTOR (OUTDOOR)

BLACK BLACK BLACK BLACK

BLACK

CN61

CN62

If the voltage does not appear, replace Main PCB.

02-16

Trouble shooting 13 OUTDOOR UNIT Error Method:

Heat Ex.(Pipe) thermistor error

Indicate or Display:

Refer to error code table.

Detective Actuators:

Outdoor unit Main PCB Heat exchanger thermistor

Detective details:

When Heat exchanger temperature thermistor open or short-circuit is detected at power ON or while running the compressor.

Forecast of Cause :

1. Connector connection failure 2.Thermistor failure 3. 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 Point 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Approx. value)

Temperature (°F)

23°F14°F

6.09.612.416.121.027.8Resistance Value (k )

86°F68°F50°F41°F32°F

3.8

122°F104°F

1.72.5

Temperature (°F)

Resistance Value (k )

176°F158°F140°F

0.60.81.2

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

OKOK

Check Point 3 :

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

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

AOU9/ 12RLS2

THERMISTOR (PIPE)

THERMISTOR (DISCHARGE)

THERMISTOR (OUTDOOR)

BLACK

BLACK BROWN BROWN

BLACK

CN71

CN70

AOU15RLS2

THERMISTOR (PIPE)

THERMISTOR (DISCHARGE)

THERMISTOR (OUTDOOR)

BLACK BLACK BLACK BLACK

BLACK

CN61

CN62

If the voltage does not appear, replace Main PCB.

02-17

Trouble shooting 14 OUTDOOR UNIT Error Method:

Outdoor thermistor error

Indicate or Display:

Refer to error code table.

Detective Actuators:

Outdoor unit Main PCB Outdoor thermistor

Detective details:

When Outdoor temperature thermistor open or short-circuit is detected at power ON or while running the compressor.

Forecast of Cause :

1. Connector connection failure 2.Thermistor failure 3. 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 Point 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Approx. value)

Temperature (°F)

5°F-4°F

26.935.246.662.384.2115.2Resistance Value (k )

50°F41°F32°F23°F14°F

20.7

68°F

86°F

8.012.6

Temperature (°F)

Resistance Value (k )

95°F

6.4

104°F

5.2

113°F

4.2

122°F

3.5

131°F

2.8

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

OKOK

Check Point 3 :

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

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

AOU9/ 12RLS2

THERMISTOR (PIPE)

THERMISTOR (DISCHARGE)

THERMISTOR (OUTDOOR)

BLACK

BLACK BROWN BROWN

BLACK

CN71

CN70

AOU15RLS2

THERMISTOR (PIPE)

THERMISTOR (DISCHARGE)

THERMISTOR (OUTDOOR)

BLACK BLACK BLACK BLACK

BLACK

CN61

CN62

If the voltage does not appear, replace Main PCB.

02-18

Trouble shooting 15

OUTDOOR UNIT Error Method:

Current sensor error

Indicate or Display:

Refer to error code table.

Detective Actuators:

Outdoor unit Main PCB

Detective details:

When Input Current Sensor has detected 0A, while Inverter Compressor is operating at higher than 56rps, after 1minute upon starting the Compressor. (Except during the defrost operation)

Forecast of Cause :

1. Defective connection of electric components 2. External cause 3. Main PCB failure

Check Point 1-1 : Reset Power Supply and operate

Does Error indication show again?

YES

Check Point 2 : Check connections of Outdoor Unit Electrical Components

Check if the terminal connection is loose. Check if connector is removed.

Check erroneous connection. Check if cable is open.

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

Check Point 1-2 : Check external cause at Indoor and Outdoor (Voltage drop or Noise)

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

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

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

Check Point 4 : Replace Main PCB

If Check Point 1, 2 do not improve the symptom, change Main PCB.

02-19

Trouble shooting 16

OUTDOOR UNIT Error Method:

Trip detection

Indicate or Display:

Refer to error code table.

Detective Actuators:

Outdoor unit Main PCB Compressor

Forecast of Cause :

1. Outdoor unit fan operation defective, foreign matter on hear exchanger,

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 compressor succeeds.

excessive rise of ambient temperature

2. Main PCB failure

3. Compressor failure (lock, winding short)

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?

OKOK

Check Point 2: Replace Main PCB

If Check Point 1 do not improve the symptom, change Main PCB.

OKOK

Check Point 3: Replace Compressor

If Check Point 2 do not improve the symptom, change Compressor.

02-20

Trouble shooting 17

OUTDOOR UNIT Error Method:

Compressor motor control error

Indicate or Display:

Refer to error code table.

Detective Actuators:

Outdoor unit Main PCB Compressor

Detective details:

If the detected rotor location is out of phase with actual rotor location more than 90°, the compressor stops. After the compressor restarts, if the same operation is repeated within 40sec, the compressor stops again. If and repeats 5 times, the compressor stops permanently.

Forecast of Cause :

1. Defective connection of electric components 2. Main PCB failure 3. Compressor failure

Check Point 1 : Check Noise from Compressor

Turn on Power and check operation noise.

If an abnormal noise show, replace Compressor.

OKOK

Check Point 2 : Check connection of around the Compressor components

For Compressor Terminal, Main PCB

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

(Refer to PARTS INFORMATION 2)

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

OKOK

Check Point 3: Replace Main PCB

If Check Point 1,2 do not improve the symptom, change Main PCB.

OKOK

Check Point 4: Replace Compressor

If Check Point 3 do not improve the symptom, change Compressor.

02-21

Trouble shooting 18

OUTDOOR UNIT Error Method:

Outdoor unit fan motor error

Indicate or Display:

Refer to error code table.

Detective Actuators:

Outdoor unit Main PCB Outdoor unit Fan motor

Detective details:

When outdoor fan rotation speed is less than 100rpm in 20 seconds after fan motor starts, fan motor stops. After fan motor restarts, if the same operation within 60sec is repeated 3 times in a row, compressor and fan motor stops. If and repeats 5 times in a row, compressor and fan motor stops permanently.

Forecast of Cause:

1. Fan rotation failure 2. Motor protection by surrounding temperature rise 3. Main PCB failure

4. Outdoor unit fan motor

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 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 3 : Check Outdoor unit fan motor

Check Outdoor unit fan motor. (PARTS INFORMATION 5)

>>If Outdoor unit fan motor is abnormal, replace Outdoor unit fan motor.

Check Point 4 : Check Output Voltage of Main PCB

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

RED

CN800 [9/12RLS2]

CN801 [15RLS2]

If the voltage is not correct, replace Main PCB.

1 2 3 4 5 6 7

BLACK WHITE YELLOW BROWN

FAN MOTOR

Read wire DC voltage

Red - Black (Vm)

White - Black (Vcc)

240 - 400V (9/12/15RLS2)

15 1.5V

02-22

Trouble shooting 19 OUTDOOR UNIT Error Method:

4-way valve error

Indicate or Display:

Refer to error code table.

Detective Actuators:

Indoor unit Controller PCB Heat Ex. temperature thermistor Room temperature thermistor 4-way valve Main PCB

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.] > 20°F(10°C)

Heating operation [Indoor heat exchanger temp.] - [room temp.] < - 20°F(-10°C)

If the same operation is repeated 5 times, the compressor stops permanently.

Forecast of Cause :

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

5. Main PCB failure 6. Controller 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 each thermistor

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

>> Check characteristics of thermistor (Refer to Trouble shooting 5, 6), If defective, replace the thermistor

OKOK

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

[ Solenoid coil ]

Remove CN30 (For 9/12RLS2) and CN500 (For 15RLS2) from PCB and check the resistance value of coil. Resistance value is 1.88k 2.29k at 68°F (20°C).

>> 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 : Check the voltage of 4-way valve

Check the voltage CN30 (For 9/12RLS2) or CN500 (For 15RLS2) of Main PCB.

Check if AC187V(AC208V-10%) - 253V(AC230V+10%) appears at CN 30 or CN500 of Main PCB.

[ Heating operation ]

>> If it is not voltage, Replace Main PCB.

[ Cooling operation ]

>> If it is voltage, Replace Main PCB.

OKOK

Check Point 5 : Replace Controller PCB

If Check Point 1- 4 do not improve the symptom, replace Controller PCB.

02-23

Trouble shooting 20 OUTDOOR UNIT Error Method:

INDOOR UNIT

Discharge temperature error

Indicate or Display:

Refer to error code table.

Detective Actuators:

Detective details:

Outdoor unit Main PCB Discharge temperature thermistor

Forecast of Cause :

1. 3-way valve not opened 2. EEV defective, strainer clogged

3. Outdoor unit operation failure, foreign matter on heat exchanger

4. Discharge temperature thermistor failure 5. Insufficient refrigerant

6. Main PCB failure

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 open?

Strainer clogging check (before and after EEV, ACM oil return)

Refer to "Service Parts Information 3".

"Protection stop by "discharge temperature 230°F(110°C) during compressor operation"" generated 2 times within 24 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 EEV, strainer

EEV open?

Strainer clogging check (before and after EEV, ACM oil return)

Refer to "Service Parts Information 3".

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 5)

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 "Trouble shooting 12".

Check Point 5 : Check the refrigerant amount

Leak check

02-24

2-3 TROUBLE SHOOTING WITH NO ERROR CODE

Trouble shooting 21

Forecast of Cause:

1. Power supply failure 2. External cause

Indoor Unit - No Power

3. Electrical components defective

Check Point 1 : Check Installation Condition

Isn’t the breaker down? Check loose or removed connection cable.

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

OKOK

Check Point 2 : Check external cause at Indoor and Outdoor (Voltage drop or Noise)

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

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

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

Check Point 3 : Check Electrical Components

Check the voltage of power supply.

>> Check if AC187 - 253V appears at Outdoor Unit Terminal L - N.

YESYES

Check Fuse in Main PCB.

>> If Fuse is open, check if the wiring between Terminal and Main PCB is loose, and replace Fuse.

Check Varistor in Main PCB.

>> If Varistor is defective, there is a possibility of an abnormal power supply. Check the correct power supply and replace Varistor. Upon checking the normal power supply, replace Varistor.

02-25

Trouble shooting 22

Outdoor Unit - No Power

Forecast of Cause:

1. Power supply failure 2. External cause

3. Electrical Components defective

Check Point 1 : Check Installation Condition

Isn’t the breaker down? Check loose or removed connection cable.

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

OKOK

Check Point 2 : Check external cause at Indoor and Outdoor (Voltage drop or Noise)

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

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

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

OKOK

Check Point 3 : Check Electrical Components

Check the voltage of power supply.

>> Check if AC187 - 253V appears at Outdoor Unit Terminal L - N.

YESYES

Check Fuse in Main PCB.

>> If Fuse is open, check if the wiring between Terminal and Main PCB is loose, and replace Fuse.

Check Varistor in Main PCB.

>> If Varistor is defective, there is a possibility of an abnormal power supply. Check the correct power supply and replace Varistor. Upon checking the normal power supply, replace Varistor.

If the symptom does not change by above Check 3, replace Main PCB.

02-26

Trouble shooting 23

Forecast of Cause:

1. Setting/ Connection failure 2. External cause

No Operation (Power is ON)

3. Electrical component defective

Check Point 1 : Check indoor and outdoor installation condition

Indoor Unit - Check incorrect wiring between Indoor Unit - Remote Control. Or, check if there is an open cable connection.

Are these Indoor Unit, Outdoor Unit, and Remote Control suitable model numbers to connect?

>> If there is some abnormal condition, correct it by referring to Installation manual and Data & Technical Manual.

Turn off Power and check/ correct followings.

Is there loose or removed communication line of Indoor Unit and Outdoor Unit?

Check Point 2 : Check external cause at Indoor and Outdoor (Voltage drop or Noise)

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

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

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

OKOK

Check Point 3 : Check Electrical Components at Indoor and Outdoor

Check Voltage at CNC01 (terminal 1-3) of UTY-TWBXF(Communication kit). (Power supply to Remote Control)

>> If it is DC13V, Remote Control is failure. (Controller PCB is normal) >> Replace Remote Control >> If it is DC 0V, Controller PCB is failure. (Check Remote Control once again) >> Check Indoor unit fan motor. (PARTS INFORMATION 4) If it is normal, replace Controller PCB. If it is abnormal, replace Indoor unit fan motor and Controller PCB.

>> If the symptom does not change by above Check 1, 2, 3, replace Main PCB of Outdoor unit.

02-27

Trouble shooting 24

No Cooling / No Heating

Forecast of Cause:

1. Indoor Unit error 2. Outdoor Unit error

3. Effect by surrounding environment

4. Connection pipe / Connection wire failure 5. Refrigeration cycle failure

Check Point 1 : Check Indoor unit

Does Indoor unit Fan run on High fan?

Is Air filter dirty? Is Heat exchanger clogged? Check if Energy save function is operated.

OKOK

Check Point 2 : Check Outdoor unit operation

Check if Outdoor unit is operating

Check any objects that obstruct the air flow route.

Check clogged Heat Exchanger.

Is the Valve open?

OKOK

Check Point 3 : Check Site condition

Is capacity of Indoor unit fitted to room size?

Any windows open? or direct sunlight ?

OKOK

Check Point 4 : Check Indoor/ Outdoor installation condition

Check connection pipe (specified pipe length & Pipe diameter?)

Check any loose or removed communication line.

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

OKOK

PSI PSI

Check Point 5 : Check Refrigeration cycle

Check if Strainer is clogged (Refer to the figure at right).

Measure Gas Pressure and if there is a leakage, correct it.

>> When recharging the refrigerant, make sure to perform vacuuming, and recharge the specified amount.

Check EEV (PARTS INFORMATION 3)

Check Compressor (PARTS INFORMATION 1,2) Check Heater Unit (PARTS INFORMATION 8)

Attention

Strainer normally does not have temperature difference between inlet and outlet as shown in , but if there is a difference like shown in , there is a possibility of inside clogged. In this case, replace Strainer.

Pipe (In) Pipe (Out)

02-28

Trouble shooting 25

Forecast of Cause :

1. Abnormal installation (Indoor/ Outdoor)

Abnormal Noise

2. Fan failure (Indoor/ Outdoor)

3. Compressor failure (Outdoor)

Diagnosis method when abnormal noise is occurred

Abnormal noise is coming from Indoor unit. (Check and correct followings)

Abnormal noise is coming from Outdoor unit. (Check and correct followings)

Is Main unit installed in stable condition? Is the installation of air suction grille and front panel normal?

Is Fan broken or deformed? Is the screw of Fan loose? Is there any object which obstruct the Fan rotation?

Trouble shooting 26

Forecast of Cause:

Water Leaking

Is Main unit installed in stable condition? Is Fan guard installed normally?

Is Fan broken or deformed? Is the screw of Fan loose?

Is there any object which obstruct the Fan rotation?

Check if vibration noise by loose bolt or contact noise of piping is happening.

Is Compressor locked?

>> Check Compressor (PARTS INFORMATION 1,2)

1. Erroneous installation 2. Drain hose failure

Diagnosis method when water leak occurs

Is Main unit installed in stable condition? Is Main unit broken or deformed at the time of transportation or maintenance?

OKOK

Is Drain hose connection loose? Is there a trap in Drain hose?

Is Drain hose clogged?

OKOK

Is Fan rotating?

Diagnosis method when water is spitting out.

Is the filter clogged?

OKOK

Check Gas pressure and correct it if there was a gas leak.

PSI PSI

02-29

2-4 SERVICE PARTS INFORMATION

SERVICE PARTS INFORMATION 1

Compressor

Diagnosis method of Compressor ( If Outdoor Unit LED displays Error, refer to Trouble shooting )

Does not start up

Is there open or loose connection cable?

Check Main PCB, connection of Compressor, and winding resistance. (Refer to the next page).

>> If there is no failure, the defect of Compressor is considered (Locked compressor due to clogged dirt or less oil)

Replace Compressor

Stops soon after starting up

Is there open or loose connection cable?

Is Gas pipe valve open? (Low pressure is too low)

PSI PSI

Check if Refrigerant is leaking. (Recharge Refrigerant)

Abnormal noise

Check if vibration noise by loose bolt or contact noise of piping is happening.

Defective Compressor can be considered. (due to inside dirt clogging or broken component)

Replace Compressor

Check if strainer is clogged. (PARTS INFORMATION 3)

Check Main PCB, connection of Compressor,and winding resistance. (Refer to the next page).

>> If there is no failure, the defect of Compressor can be considered. (Compression part broken or valve defective.)

02-30

Replace Compressor

SERVICE PARTS INFORMATION 2

Compressor

Check Point 1 : Check Connection

Check terminal connection of Compressor (loose or incorrect wiring)

Terminal cover opened

(BLACK)

(RED)

AOU9/ 12/ 14RLS2

(WHITE)

Check Point 2 : Check Winding Resistance

Check winding resistance of each terminal

If the resistance value is 0 or infinite, replace Compressor.

AOU9 / 12RLS2

Resistance Value :

1.4 at 77°F(25°C)

AOU15RLS2

Resistance Value :

0.7 at 77°F(25°C)

Check Point 3 : Replace Main PCB

If the symptom does not change with above Check 1, 2, replace Main PCB.

02-31

SERVICE PARTS INFORMATION 3

Outdoor unit Electronic Expansion Valve ( EEV )

Check Point 1 : Check Connections

Check connection of connector (CN40 or CN700) ( Loose connector or open cable )

CN40 [9/12RLS2]

CN700 [15RLS2]

1 2 3 4 5

RED

BLUE

ORANGE

YELLOW

WHITE

EXPANSION VALVE COIL

Check Point 2 : Check Coil of EEV

Remove connector, check each winding resistance of Coil.

Read wire

Resistance value

White - Red

Yellow - Red

Orange - Red

46 4

at 68°F(20°C)

Blue - Red

If Resistance value is abnormal, replace EEV.

Check Point 3 : Check Voltage from Main PCB.

Remove Connector and check Voltage (DC12V)

If it does not appear, replace Main PCB.

Check Point 4 : Check Noise at start up

Turn on Power and check operation noise.

If an abnormal noise does not show, replace Main PCB.

Check Point 5 : Check Opening and Closing Operation of Valve

When Valve is closed, it has a temp. difference between Inlet and Outlet.

CLOSE Example : Hot Gas

Pipe (In)

Hi TEMP.

Pipe (Out)

Normal TEMP.

If it is open, it has no temp. difference between Inlet and Outlet.

OPEN Example : Hot Gas

Pipe (In)

Hi TEMP.

Pipe (Out)

Hi TEMP.

Check Point 6 : Check Strainer

Strainer normally does not have temperature difference between inlet and outlet as shown in , but if there is a difference as shown in , there is a possibility of inside clogged. In this case, replace Strainer.

Pipe (In) Pipe (Out)

02-32

SERVICE PARTS INFORMATION 4

Indoor unit fan motor

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 resistance of Indoor Fan Motor

Refer to below. Circuit-test "Vm" and "GND" terminal. (Vm: DC voltage, GND: Earth terminal)

>>If they are short-circuited (below 300 k ), replace Indoor fan motor and Controller PCB.

Pin number (wire color)

1 (Blue)

2 (Yellow)

3 (White)

4 (Black)

6 (Red)

Terminal function (symbol)

Feed back (FG)

Speed command (Vsp)

Control voltage (Vcc)

Earth terminal (GND)

No function

DC voltage (Vm)

SERVICE PARTS INFORMATION 5

Outdoor unit fan motor

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 resistance of Outdoor Fan Motor

Refer to below. Circuit-test "Vm" and "GND" terminal. (Vm: DC voltage, GND: Earth terminal)

>>If they are short-circuited (below 300 k ), replace Outdoor fan motor and Main PCB.

Pin number (wire color)

1 (Red)

4 (Black)

5 (White)

6 (Yellow)

7 (Brown)

Terminal function (symbol)

DC voltage (Vm)

No function

Earth terminal (GND)

Control voltage (Vcc)

Speed command (Vsp)

Feed back (FG)

02-33

For AOU15RLS2

SERVICE PARTS INFORMATION 6

Active filter module

Check Point 1 : Check Open or Short-circuit and Diode (D1)

Remove connector, check the open or short-circuit and the diode in the module

+IN

-IN

L2L1

Check the open or short-circuit

Terminal

Resistance value

Tester(+) Tester(-)

※

(+IN)

( IN)

L1,L2

( IN)

(+IN)

Control Box

360k

720k

1.40M /

(Ref. value 1)

360k

1.69M /

(Ref. value 1)

20%

2.28M

(Ref. value 2)

20%

1.88M

(Ref. value 2)

Check the diode

Terminal

Resistance value

Tester(+) Tester(-)

※

1.32M /

(Ref. value 1)

1.40M /

(Ref. value 1)

1.50M

(Ref. value 2)

1.51M

(Ref. value 2)

※

Ref. value 1 Specifications for Multimeter Manufacturer : HIOKI Model name : 3804 Power source : DC9V.

By kind of tester, the value may change significantly.

If it is abnormal,replace ACTIVE FILTER MODULE

Check Point 2 : Check the Output DC voltage (between P and N)

Check the Output DC voltage (between P and N) of compressor stopping and operating.

>> If the output voltage of compressor operating is less than the output voltage of compressor stopping, Active Filter Module is detective. >> Replace Active Filter Module

Ref. value 2 Specifications for Multimeter Manufacturer : YOKOGAWA Model name : 7534 Power source : DC3V.

02-34

For AOU15RLS2

SERVICE PARTS INFORMATION 7

IPM (Mounted on Transistor PCB)

Check Point 1

 Disconnect the connection wires between the Transistor PCB - Capacitor PCB and Transistor PCB - Inverter Compressor.

 Set the tester to the "Resistance" mode, and measure the resistance between the following terminals.

TM301 (P) - TM305(U) / TM304(V) / TM303(W) TM302 (N) - TM305(U) / TM304(V) / TM303(W)

 Judge the result of as follows:

Terminal

Tester(+) Tester(-)

Resistance value

Over 2k (Including )

Over 20k (Including )

Over 2k (Including )

Check Point 2

Set the tester to the "Diode" mode, and measure the voltage value between the following terminals.

Judge the result of as follows:

Terminal

Tester(+) Tester(-)

Tester display

0.3V 0.7V

02-35

WALL MOUNTED type

R410A

INVERTER

3 . APPENDING DATA

3-1. FUNCTION SETTING

3-1-1 INDOOR UNIT

Follow the instructions in the Local Setup Procedure, which is supplied with the remote control, in accordance with the installed condition. After the power is turned on, perform the Function Setting on the remote control.

The settings may be selected between the following two: Function Number or Setting Value.

Settings will not be changed if invalid numbers or setting values are selected.

1-1. Setting the Filter Sign

The indoor unit has a sign to inform the user that it is time to clean the filter. Select the time setting for the filter sign display interval in the table below according to the amount of dust or debris in the room. If you do not wish the filter sign to be displayed, select the setting value for "No indication".

( Factory setting)

Setting Description

Standard (400 hours)

Long interval (1000 hours)

Short interval ( 200 hours)

No indication

1-2. Cooling Room Temperature Correction

Depending on the installed environment, the room temperature sensor may require a correction. The settings may be selected as shown in the table below.

Setting Description

Standard

Slightly lower control

Lower control

Warmer control

Function Number Setting Value

( Factory setting)

1-3. Heating Room Temperature Correction

Depending on the installed environment, the room temperature sensor may require a correction. The settings may be selected as shown in the table below.

Setting Description

Standard

Lower control

Slightly warmer control

Warmer control

Function Number Setting Value

03-01

( Factory setting)

1-4. Setting the Auto Restart

Enable or disable automatic system restart after a power outage.

( Factory setting)

Setting Description

Yes

Function Number Setting Value

1-5. Indoor room temperature sensor switching function (Only for Wired remote controller)

The following settings are needed when use the control by Wired remote controller temperature sensor.

( Factory setting)

Setting Description

Yes

* If setting value is "00" : Room temperature is controlled by the indoor unit temperature sensor. * If setting value is "01" : Room temperature is controlled by either indoor unit temperature sensor or remote controller unit sensor.

Function Number Setting Value

1-6. Remote controller signal code

Change the indoor unit Signal Code, depending on the remote controllers.

( Factory setting)

Setting Description

1-7. External input control

"Operation/Stop" mode or "Forced stop" mode can be elected.

Setting Description

Operation/Stop mode

(Setting forbidden)

Forced stop mode

Function Number Setting Value

( Factory setting)

Function Number Setting Value

03-02

3-1-2 Procedures to change the Function Setting for wireless RC

This procedure changes to the function settings used to control the indoor unit according to the installation conditions. Incorrect settings can cause the indoor unit malfunction.

After the power is turned on, perform the "FUNCTION SETTING" according to the installation conditions using the remote controller.

Settings will not be changed if invalid numbers or setting values are selected.

Entering the Function Setting Mode

While pressing the POWERFUL button and SET TEMP.( ) button simultaneously, press the RESET button to enter the function setting mode.

Selecting the Function Number and Setting Value

(1) Press the SET TEMP.( ) ( ) buttons to select the function number. (Press the 10°C HEAT button to switch between the left and right digits.)

(2) Press the POWERFUL button to proceed to setting the value. (Press the POWERFUL button again to return to the function number selection.)

(3) Press the SET TEMP.( ) ( ) buttons to select the setting value. (Press the 10°C HEAT button to switch between the left and right digits.)

(4) Press the MODE button, in the order listed to confirm the setting. Please confirm that the beep sounds.

(5) Next, please press the START/STOP( ) button. Please confirm that the beep sounds.

(6) Press the RESET button to cancel the function setting mode.

Function Number

Setting Value

(7) After completing the FUNCTION SETTING, be sure to turn off the power and turn it on again.

CAUTION

After turning off the power, wait 10 seconds or more before turning on it again. The FUNCTION SETTING doesn't become active unless the power is turned off then on again.

03-03

Selecting the Remote Controller Signal Code

(1) Press the START/STOP( ) button until only the clock is displayed on the remote controller display.

(2) Press the MODE button for at least 5 seconds to display the current signal code. (initially set to ).

(3) Press the SET TEMP.( ) ( ) buttons to change the signal code between . Match the code on the display to the air conditioner signal code.

(4) Press the MODE button again to return to the clock display. The signal code will be changed.

CAUTION

If no buttons are pressed within 30 seconds after the signal code is displayed, the system returns to the original clock display. In this case, start again from step 1. The air conditioner signal code is set to A prior to shipment.

03-04

3-2. Thermistor Resistance Values

3-2-1 INDOOR UNIT

Room temperature thermistor

Temp °F(°C)

14 (-10) 58.2 0.73 23 (-5) 44.0 0.93 -13 (-25) 804.5 0.29 32 (0) 33.6 1.15 -4 (-20) 579.6 0.40 41 (5) 25.9 1.39 5 (-15) 422.9 0.53 50 (10) 20.2 1.66 14 (-10) 312.3 0.69 59 (15) 15.8 1.94 23 (-5) 233.2 0.88 68 (20) 12.5 2.22 32 (0) 176.0 1.10 77 (25) 10.0 2.50 41 (5) 134.2 1.36 86 (30) 8.0 2.77 50 (10) 103.3 1.63

95 (35) 6.5 3.03 59 (15) 80.3 1.92 104 (40) 5.3 3.27 68 (20) 62.9 2.21 113 (45) 4.4 3.49 77 (25) 49.7 2.51

Resistance(k )

Voltage(V)

Indoor heat exchanger thermistor

Temp°F(°C)

-22 (-30) 1131.9 0.21

86 (30) 39.6 2.79

95 (35) 31.7 3.06 104 (40) 25.6 3.30 113 (45) 20.8 3.53 122 (50) 17.1 3.73 131 (55) 14.1 3.90 140 (60) 11.6 4.05 149 (65) 10.4 4.14

Resistance(k )

3-2-2 OUTDOOR UNIT

Voltage(V)

Discharge thermistor

Temp°F(°C)

-22 (-30) 1013.1 0.06

-12 (-25) 729.1 0.09

-4 (-20) 531.6 0.12 5 (-15) 392.3 0.16

14 (-10) 292.9 0.21 23 (-5) 221.1 0.28

32 (0) 168.6 0.36 41 (5) 129.8 0.46 50 (10) 100.9 0.57 59 (15) 79.1 0.71 68 (20) 62.5 0.86 77 (25) 49.8 1.03 86 (30) 40.0 1.23

95 (35) 32.4 1.43 104 (40) 26.3 1.65 113 (45) 21.6 1.88 122 (50) 17.8 2.11 131 (55) 14.8 2.34 140 (60) 12.3 2.57 149 (65) 10.3 2.79

158 (70) 8.7 3.00 167 (75) 7.4 3.19 176 (80) 6.3 3.37 185 (85) 5.4 3.54

194 (90) 4.6 3.69 203 (95) 4.0 3.83

212 (100) 3.4 3.96 221 (105) 3.0 4.07 230 (110) 2.6 4.17 239 (115) 2.3 4.26 248 (120) 2.0 4.33

Resistance(k )

Voltage(V)

Outdoor heat exchanger thermistor

Temp°F(°C)

-22 (-30)

-12 (-25)

-4 (-20) 5 (-15)

14 (-10)

23 (-5) 32 (0) 41 (5) 50 (10) 59 (15) 68 (20) 77 (25) 86 (30)

95 (35) 104 (40) 113 (45) 122 (50) 131 (55) 140 (60) 149 (65)

158 (70) 167 (75) 176 (80)

Resistance(k )

95.6 0.24

68.9 0.32

50.3 0.43

37.2 0.57

27.8 0.73

21.0 0.92

16.1 1.14

12.4 1.39

9.6 1.65

7.6 1.93

6.0 2.21

4.8 2.49

3.8 2.77

3.1 3.02

2.5 3.26

2.1 3.48

1.7 3.68

1.4 3.85

1.2 4.00

1.0 4.13

0.8 4.25

0.7 4.35

0.6 4.43

Voltage(V)

Outdoor temperature thermistor

Temp°F(°C)

-22 (-30)

-12 (-25)

-4 (-20) 5 (-15)

14 (-10) 23 (-5)

32 (0) 41 (5) 50 (10) 59 (15) 68 (20) 77 (25) 86 (30)

95 (35) 104 (40) 113 (45) 122 (50) 131 (55)

Resistance(k )

224.3 0.73

159.7 0.97

115.2 1.25

84.2 1.56

62.3 1.90

46.6 2.26

35.2 2.61

26.9 2.94

20.7 3.25

16.1 3.52

12.6 3.76

10.0 3.97

8.0 4.14

6.4 4.28

5.2 4.41

4.2 4.51

3.5 4.59

2.8 4.65

Voltage(V)

03-05

WALL MOUNTED type

R410A

INVERTER

4 . REPLACEMENT PARTS

4-1 ASU9/ 12/ 15RLS2

4-1-1 PARTS LAYOUT DRAWING

Air Filter

Bracket Panel

Intake Grille Assy

Controller PCB

Cover Shield

Wire Shield

Wire Cover

Front Panel

Human Sensor

Detail - A

04-01

4-1-2 DISASSEMBLY PROCESS

1. Intake Grille Assy removal

Open the intake grille. While holding the intake grille, lift up the grille stay and secure the intake grille. Remove the screws from the arm-cover on the top part of the front panel. (in 2 places, one on the left and one on the right). Push down the arm-cover grips to release the lock. Open the intake grille until it is horizontal, and pull it towards you to remove it.

2. Air Filter removal

Lift up the Air Filter's handle, disconnect the 2 lower tabs, and pull out.

Air Filter handle

Intake grille

Grille stay

Arm-cover knob

Grille stay

Air Filter

Hooks

04-02

3. Front Panel removal

Remove the mounting screw for Wire Cover. Remove the Wire Cover Remove the 4 mounting screws.

Screws (4 position)

Screw (Wire cover)

Wire cover

The Front Panel is pulled to the front, raising the upper surface, and the Front Panel is removed.

Front panel

04-03

4. Control cover removal

Remove the 1 mounting screw. Remove the Cover Shield by sliding near side.

Cover Shield

Holder(Room thermistor)

Controller PCB

Display case &Display PCB assy

Thermistor assy (Room thermistor &Pipe thermistor)

5. Controller PCB removal

Remove the connectors and the Earth wire. Remove the Controller PCB.

Replaceable Component

Controller PCB Display PCB assy Thermistor assy

Hooks

04-04

VIEW - B

6. Control Unit removal

Remove the 1 mounting screw. Remove the Control Unit by sliding near side.

Control Unit

04-05

7. Under cover removal

Remove the screw caps and screws from the under cover (in each of 3 places).

Under cover

Screw cap

Hold down the central part of the under cover. Release the tabs by pressing on the side of the under cover (in 2 places on the side). Remove the under cover.

Screw

04-06

Tab

8. Casing assy removal

Remove the 4 mounting screws. Remove the Casing assy by sliding downward.

Crossflow fan assy

Fan motor

Replaceable Component

Fan motor Crossflow fan assy

04-07

1116,Suenaga,Takatsu-ku,Kawasaki 213-8502,Japan

February 2012 Printed in Japan

Fujitsu ASU9RLS2 Service instructions manual

Specifications and Main Features

Frequently Asked Questions

User Manual