Mitsubishi Electronics MSY-A15NA, MSZ-A15NA, MSZ-A09NA, MSY-A17NA, MSZ-A17NA User Manual

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Revision B:

• MSZ-A•NA - 1 and MSY-A•NA- 1 have been

added.

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

Please void OB450 REVISED EDITION-A.

INDOOR UNIT

SERVICE MANUAL

No. OB450

REVISED EDITION-B

Wireless type Models

MSZ-A09NA MSZ-A09NA - 1 MSZ-A12NA MSZ-A12NA - 1 MSZ-A15NA MSZ-A15NA - 1 MSZ-A17NA MSZ-A17NA - 1

MSZ-A24NA MSZ-A24NA - 1 MSY-A15NA MSY-A15NA - 1 MSY-A17NA MSY-A17NA - 1 MSY-A24NA MSY-A24NA - 1

Outdoor unit service manual MUZ-A·NA Series (OB451) MXZ-A·NA Series (OB444)

MSZ-A09NA MSY-A15NA MSZ-A12NA MSY-A17NA MSZ-A15NA

MSZ-A17NA

CONTENTS

1.TECHNICAL CHANGES ····································2

2.PART NAMES AND FUNCTIONS······················3

3.SPECIFICATION·················································4

4.OUTLINES AND DIMENSIONS ·························6

5.WIRING DIAGRAM ············································8

6.REFRIGERANT SYSTEM DIAGRAM ················9

7.SERVICE FUNCTIONS ····································10

8.TROUBLESHOOTING······································11

9.DISASSEMBLY INSTRUCTIONS ····················25

10.PARTS LIST······················································30 10-1. PARTS LIST·············································30 10-2. RoHS PARTS LIST ··································36

11.MICROPROCESSOR CONTROL·····················42

NOTE:

RoHS compliant products have <G> mark on the spec name plate. For servicing of RoHS compliant products, refer to the PARTS LIST (RoHS compliant).

Revision A :

• PARTS LIST has been revised. (10-1.8, 10-2.8)

Revision B :

MSZ-A•NA- 1 and MSY-A•NA- 1 Remote controller has been changed.

1 TECHNICAL CHANGES

MSZ09UN MSZ-A09NA MSZ12UN MSZ-A12NA MSH15TN MSZ-A15NA MSH17TN MSZ-A17NA

MSH24WN MSZ-A24NA MS15TN MSY-A15NA MS17TN MSY-A17NA MS24WN MSY-A24NA

1.Control method between indoor and outdoor has been changed. 2.Indoor fan motor has been changed.

3.Signal of remote controller has been changed. (It is not available for conventional models.)

MSZ-A09NA MSZ-A09NA- 1 MSZ-A12NA MSZ-A12NA- 1 MSZ-A15NA MSZ-A15NA- 1 MSZ-A17NA MSZ-A17NA- 1

MSZ-A24NA MSZ-A24NA- MSY-A15NA MSY-A15NA- MSY-A17NA MSY-A17NA- MSY-A24NA MSY-A24NA-

1

1

1

1

1.Remote controller has been changed.

• Temperature indication function (_F/_C) has been added. (Refer to 11-10.)

Models

Remote controller

Temperature indication

 

 

 

MSZ-A09/12/15/17NA

KM06A

_F

 

 

 

MSZ-A09/12/15/17NA-

KM07J

_F/ _C

 

 

 

MSZ-A24NA

KM06B

_F

 

 

 

MSZ-A24NA-

KM07K

_F/ _C

 

 

 

MSY-A15/17NA

KM06C

_F

 

 

 

MSY-A15/17NA-

KM07L

_F/ _C

 

 

 

MSY-A24NA

KM06D

_F

 

 

 

MSY-A24NA-

KM07M

_F/ _C

 

 

 

• Timer indication has been changed. (AM/PM indication) 2.Conduit plate has been removed. (MSZ-A09/12/15/17,MSY-A15/17)

3.Conduit cover, terminal block cover and terminal block holder have been changed. (MSZ-A09/12/15/17,MSY-A15/17)

2

2 PART NAMES AND FUNCTIONS

MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA

Panel

MSY-A15NA

MSZ-A24NA

MSY-A17NA

MSY-A24NA

Front panel

Air inlet

Heat exchanger

Air cleaning filter (Anti-Allergy Enzyme Filter, Blue bellows type)

Catechin air filter

Air outlet

Vertical vane

Remote controller

Horizontal vane

Line flow fan

MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSY-A15NA MSY-A17NA

Operation section

Display section

(When the front panel is opened)

Operation Indicator lamp

Emergency operation switch

Remote control

 

receiving section

MSZ-A24NA MSY-A24NA

Operation indicator lamp

Emergency operation switch

Remote control receiving section

ACCESSORIES

 

 

MSZ-A09/12/15/17NA

MSZ-A09/12/15/17NA- 1

MSZ-A24NA

 

 

MSY-A15/17NA

MSY-A15/17NA- 1

MSY-A24NA

 

 

 

 

 

1

Installation plate

1

1

1

 

 

 

 

 

2

Installation plate fixing screw 4 o 25 mm

8

5

7

 

 

 

 

 

3

Remote controller holder

1

1

1

 

 

 

 

 

4

Fixing screw for 3 o 3.5 o 1.6 mm (Black)

2

2

2

 

 

 

 

 

5

Battery (AAA) for remote controller

2

2

2

 

 

 

 

 

6

Wireless remote controller

1

1

1

 

 

 

 

 

7

Felt tape (Used for left or left-rear piping)

1

1

1

 

 

 

 

 

8

Conduit plate

1

 

 

 

 

 

3

Mitsubishi Electronics MSY-A15NA, MSZ-A15NA, MSZ-A09NA, MSY-A17NA, MSZ-A17NA User Manual

 

3

 

 

SPECIFICATION

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Item

 

 

 

 

Model

MSZ-A09NA

 

MSZ-A12NA

 

Indoor unit model

 

 

 

MSZ-A09NA

 

MSZ-A12NA

 

External finish

 

 

 

 

 

 

White

 

 

Power supply

 

 

V, phase, Hz

 

 

208/230, 1, 60

 

 

 

Max.-fuse size

(time delay)/ Disconnect switch

A

 

 

 

15

 

 

 

Min. circuit ampacity

 

 

A

1.0

 

 

1.0

 

 

Fan motor

 

 

 

 

F.L.A

0.76

 

 

0.76

 

 

Airflow Low— Med.— High

HEAT Dry

 

CFM

307-222-159

 

353-240-159

 

COOL Dry (Wet)

CFM

307(275)-229(205)-152(134)

 

353(318)-240(215)-152(134)

 

Moisture removal

 

 

 

 

pt./h

2.3

 

 

3.2

 

 

Sound level Low-Med.-High

 

dB(A)

22-33-38

 

22-34-42

 

Cond. drain connection O.D.

 

in.

 

 

 

5/8

 

 

 

Dimensions

 

 

W

 

in.

 

 

30-11/16

 

 

 

 

 

D

 

in.

 

 

 

8-1/4

 

 

 

Weight

 

 

H

 

in.

 

 

11-3/4

 

 

 

 

 

 

 

Ib.

23

 

 

23

 

 

Remote controller

 

 

 

 

 

Wireless type

 

 

Control voltage (by built-in transformer)

 

 

 

12-24V DC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Item

 

 

 

 

Model

MSZ-A15NA

 

MSY-A15NA

 

MSZ-A17NA

 

MSY-A17NA

 

Indoor unit model

 

 

 

MSZ-A15NA

 

MSY-A15NA

 

MSZ-A17NA

 

MSY-A17NA

 

External finish

 

 

 

 

 

 

White

 

 

Power supply

 

 

V, phase, Hz

 

 

208/230, 1, 60

 

 

 

-

 

 

 

(time delay)/ Disconnect switch

A

 

 

 

15

 

 

 

Max. fuse size

 

 

 

 

 

 

Min. circuit ampacity

 

 

A

1.0

 

 

1.0

 

 

Fan motor

 

 

 

 

F.L.A

0.76

 

 

0.76

 

 

Airflow Low— Med.— High

HEAT Dry

 

CFM

381-314-254

 

 

381-314-254

 

 

COOL Dry (Wet)

CFM

381(342)-328(293)-268(240)

 

381(342)-328(293)-268(240)

 

Moisture removal

 

 

 

 

pt./h

4.7

 

 

5.1

 

 

Sound level Low-Med.-High (Cooling/Heating)

dB(A)

34-40-45/34-38-44

 

34-40-45/ —

 

34-40-46/34-38-44

 

34-40-46/ —

 

Cond. drain connection O.D.

 

in.

 

 

 

5/8

 

 

 

Dimensions

 

 

W

 

in.

 

 

30-11/16

 

 

 

 

 

D

 

in.

 

 

 

8-1/4

 

 

 

Weight

 

 

H

 

in.

 

 

11-3/4

 

 

 

 

 

 

 

Ib.

23

 

 

23

 

 

Remote controller

 

 

 

 

 

Wireless type

 

 

Control voltage (by built-in transformer)

 

 

 

12-24V DC

 

 

 

 

 

 

 

 

 

 

 

 

Item

 

 

 

 

Model

MSZ-A24NA

 

MSY-A24NA

 

Indoor unit model

 

 

 

MSZ-A24NA

 

MSY-A24NA

 

External finish

 

 

 

 

 

 

White

 

 

Power supply

 

 

V, phase, Hz

 

 

208/230, 1, 60

 

 

 

Max.-fuse size

(time delay)/ Disconnect switch

A

 

 

 

15

 

 

 

Min. circuit ampacity

 

 

A

1.0

 

 

1.0

 

 

Fan motor

 

 

 

 

F.L.A

0.76

 

 

0.76

 

 

Airflow Low— Med.— High

HEAT Dry

 

CFM

568-486-296

 

 

 

COOL Dry (Wet)

CFM

568(508)-431(385)-296(265)

 

568(508)-431(385)-296(265)

 

Moisture removal

 

 

 

 

pt./h

7.3

 

 

7.3

 

 

Sound level Low-Med.-High (Cooling/Heating)

dB(A)

34-40-49/34-40-48

 

34-40-49/ —

 

Cond. drain connection O.D.

 

in.

 

 

 

5/8

 

 

 

Dimensions

 

 

W

 

in.

 

 

43-5/16

 

 

 

 

 

D

 

in.

 

 

10-1/4

 

 

 

Weight

 

 

H

 

in.

 

 

12-13/16

 

 

 

 

 

 

 

Ib.

37

 

 

37

 

 

Remote controller

 

 

 

 

 

Wireless type

 

 

Control voltage (by built-in transformer)

 

 

 

12-24V DC

 

 

NOTE : Test conditions are based on ARI 210/240.

 

 

 

 

 

 

 

 

 

1 : Rating conditions(cooling) —

Indoor : 80˚FDB, 67˚FWB, Outdoor : 95˚FDB, (75˚FWB)

 

 

 

 

 

 

 

 

 

 

(heating) —

Indoor : 70˚FDB, 60˚FWB, Outdoor : 47˚FDB, 43˚FWB

 

 

 

 

 

2 :

 

 

(heating) —

Indoor : 70˚FDB, 60˚FWB, Outdoor : 17˚FDB, 15˚FWB

 

 

 

 

4

3-1. OPERATING RANGE

(1) POWER SUPPLY

Model

Rated voltage

Guaranteed Voltage

 

 

 

 

 

 

 

MSZ-A09NA MSY-A15NA

 

Min. 198V 208V 230V Max. 253V

MSZ-A12NA MSY-A17NA

208/230V 1phase 60Hz

MSZ-A15NA MSY-A24NA

 

 

 

 

 

 

 

 

 

 

MSZ-A17NA

 

 

 

 

 

 

MSZ-A24NA

 

 

 

 

 

 

 

 

 

 

 

 

 

(2) OPERATION

 

Intake air

 

Indoor

 

Outdoor

Function

temperature

 

 

 

 

 

 

 

DB (˚F)

WB (˚F)

DB (˚F)

WB (˚F)

 

Condition

 

 

 

 

 

 

Standard temperature

80

67

95

 

Maximum temperature

95

71

115

Cooling

Minimum temperature

67

57

14

 

 

Maximum humidity

 

78%

 

 

Standard temperature

70

60

47

43

Heating

Maximum temperature

80

67

75

65

 

Minimum temperature

70

60

14

13

3-2. OUTLET AIR SPEED AND COVERAGE RANGE

Model

Mode

Function

Air flow

Air speed

Coverage

 

 

 

(CFM)

(ft./sec.)

range (ft.)

 

HEAT

Dry

307

16.8

23.4

MSZ-A09NA

COOL

Dry

307

16.8

23.4

 

Wet

275

15.1

21.0

 

 

 

HEAT

Dry

353

19.3

26.7

MSZ-A12NA

COOL

Dry

353

19.3

26.7

 

Wet

318

17.4

24.1

 

 

MSZ-A15NA

HEAT

Dry

381

20.9

28.8

MSZ-A15NA

COOL

Dry

381

20.9

28.8

MSY-A15NA

Wet

342

18.8

26.0

 

MSZ-A17NA

HEAT

Dry

381

20.9

28.8

MSZ-A17NA

COOL

Dry

381

20.9

28.8

MSY-A17NA

Wet

342

18.8

26.0

 

MSZ-A24NA

HEAT

Dry

568

20.2

34.4

MSZ-A24NA

COOL

Dry

568

20.2

34.4

MSY-A24NA

Wet

508

18.1

30.9

 

The air coverage range is the figure up to the position where the air speed is 1 ft./sec., when air is blown out horizontally from the unit properly at the High speed position.

The coverage range should be used only as a general guideline since it varies according to the size of the room and furniture arranged inside the room.

5

4 OUTLINES AND DIMENSIONS

MSZ-A09NA MSY-A15NA MSZ-A12NA MSY-A17NA MSZ-A15NA

MSZ-A17NA

30-11/16

11-3/4

2-1/8

24-9/16

2-5/16 3/4

6-1/4

Unit : inch

Conduit plate(MSZ-A•NA-

and MSY-A•NA-

are excluded.)

 

 

 

7/16x1 Oblong hole

7/16x13/16 Oblong hole

 

 

9/16

 

Installation plate

2-3/16

8-7/8

 

8-7/8

2-3/16

 

8-7/16

10-1/8

 

 

7/8 hole

7/8 8-7/16

9-3/16

10-3/4

11-5/16

 

 

 

1-5/8

 

6-1/8

6-1/8

 

11/16

 

1/8

 

 

 

1-3/4

 

 

2-3/16

13-3/16

 

12-5/8

2-3/4

 

 

 

-

 

 

Indoor unit

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Air in

 

 

Wall hole [2-9/16

 

 

8-1/4

3/16

 

 

 

 

Installation plate

Liquid line [1/4 19-11/16 {Gas line [3/8 16-15/16 Insulation [1-3/8 O.D

[3/4 I.D

 

Drain hose [5/8

4

(Connected part O.D)

 

Air out

 

Insulation [1-1/8

6

MSZ-A24NA

Unit : inch

MSY-A24NA

 

Installation plate 3-7/8

42-1/16

 

1-7/8

16-5/16

 

3-7/8

43-5/16

 

10-1/4

Air in

 

12-13/16

2-3/16

31-1/8

9-15/16

 

 

Air out

2-5/16

3/4

 

6-1/4

 

 

Wireless remote controller

 

Indoor unit

 

 

 

6-13/16

 

5/16

 

 

 

 

 

10-1/16

12-3/8

16-5/16

1/8

1-7/8

 

6-13/16

 

 

Wall hole [3 3/16

Installation plate

{Liquid line [1/4 19-11/16 Gas line [5/8 16-15/16 Insulation [1-15/16 O.D

[1-1/4 I.D

Drain hose [5/8 (Connected part O.D)

Insulation [1-1/8

7

5 WIRING DIAGRAM

MSZ-A09NA MSY-A15NA

MSZ-A12NA MSY-A17NA

MSZ-A15NA

MSZ-A17NA

MSZ-A24NA

MSY-A24NA

8

6 REFRIGERANT SYSTEM DIAGRAM

MSZ-A09NA

MSZ-A12NA

 

Refrigerant pipe [3/8

 

(with heat insulator)

Indoor

Indoor coil

thermistor

heat

RT12(main)

exchanger

Flared connection

Indoor coil thermistor RT13(sub)

Room temperature thermistor

RT11

Flared connection

Refrigerant pipe [1/4 (with heat insulator)

MSZ-A24NA

MSY-A24NA

Refrigerant pipe [5/8

 

(with heat insulator)

 

Indoor coil

Indoor

thermistor

heat

RT12(main)

 

exchanger

Distributor

 

Flared connection

Indoor coil thermistor RT13(sub)

Room temperature thermistor

RT11

Flared connection

Refrigerant pipe [1/4 (with heat insulator)

MSZ-A15NA

MSY-A15NA

Unit:inch

MSZ-A17NA MSY-A17NA

 

 

Refrigerant pipe [1/2

 

(with heat insulator)

Indoor

Indoor coil

 

thermistor

 

heat

RT12(main)

 

exchanger

Distributor

 

 

Flared connection

Indoor coil thermistor RT13(sub)

Room temperature thermistor

RT11

Flared connection

Refrigerant pipe[1/4 (with heat insulator)

Refrigerant flow in cooling

Refrigerant flow in heating

9

7 SERVICE FUNCTIONS

MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSZ-A24NA

MSY-A15NA MSY-A17NA MSY-A24NA

7-1. TIMER SHORT MODE

For service, set time can be shortened by short circuit of JPG and JPS the indoor electronic control P.C. board. The time will be shortened as follows. (Refer to 8-7.)

Set time : 1-minute 1-second

Set time : 3-minute 3-second (It takes 3 minutes for the compressor to start operation. However, the starting time is shortened by short circuit of JPG and JPS.)

7-2. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATION

A maximum of 4 indoor units with wireless remote controllers can be used in a room.

In this case, to operate each indoor unit individually by each remote controller, P.C. boards of remote controller must be modified according to the number of the indoor unit.

How to modify the remote controller P.C. board

Remove batteries before modification. The board has a print as shown below :

 

NOTE : For modification, take out

 

the batteries and press the

 

OPERATE/STOP(ON/OFF)

 

button twice or 3 times at

 

first.

 

After finish modification,

 

put back the batteries then

J1 J2

press the RESET button.

The P.C. board has the print “J1” and “J2”. Solder “J1” and “J2” according to the number of indoor unit as shown in Table 1. After modification, press the RESET button.

Table 1

 

1 unit operation

2 units operation

3 units operation

4 units operation

 

 

 

 

 

No. 1 unit

No modification

Same as at left

Same as at left

Same as at left

 

 

 

 

 

No. 2 unit

Solder J1

Same as at left

Same as at left

 

 

 

 

 

No. 3 unit

Solder J2

Same as at left

 

 

 

 

 

No. 4 unit

Solder both J1 and J2

How to set the remote controller exclusively for particular indoor unit

After you turn the breaker ON, the first remote controller that sends the signal to the indoor unit will be regarded as the remote controller for the indoor unit.

The indoor unit will only accept the signal from the remote controller that has been assigned to the indoor unit once they are set.

The setting will be cancelled if the breaker has turned off, or the power supply has shut down. Please conduct the above setting once again after the power has restored.

10

7-3. AUTO RESTART FUNCTION

When the indoor unit is controlled with the remote controller, the operation mode, the set temperature, and the fan speed are memorized by the indoor electronic control P.C. board. The “AUTO RESTART FUNCTION” sets to work the moment power has restored after power failure. Then, the unit will restart automatically.

Operation

1 If the main power has been cut, the operation settings remain.

2 After the power is restored, the unit restarts automatically according to the memory. (However, it takes at least 3 minutes for the compressor to start running.)

How to release “AUTO RESTART FUNCTION”

1Turn off the main power of the unit.

2Solder the Jumper wire JR07 on the indoor electronic control P.C. board. (Refer to 8-7.)

MSZ-A09/12/15/17NA

MSZ-A24NA

MSY-A15/17NA

MSY-A24NA

CN211

CN211

JR07

BZ

CN151 CN112

JR07

BZ

CN152

CN101

CN151 CN112

NOTE:

The operation settings are memorized when 10 seconds have passed after the indoor unit was operated with the remote controller.

If main power is turned OFF or a power failure occurs while AUTO START/STOP timer is active, the timer setting is cancelled.

If the unit has been off with the remote controller before power failure, the auto restart function does not work as the power button of the remote controller is off.

To prevent breaker off due to the rush of starting current, systematize other home appliance not to turn on at the same time.

When some air conditioners are connected to the same supply system, if they are operated before power failure, the starting current of all the compressors may flow simultaneously at restart.

Therefore, the special counter-measures are required to prevent the main voltage-drop or the rush of the starting current by adding to the system that allows the units to start one by one.

8 TROUBLESHOOTING

MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSZ-A24NA MSY-A15NA MSY-A17NA MSY-A24NA

8-1. Cautions on troubleshooting

1.Before troubleshooting, check the following

1)Check the power supply voltage.

2)Check the indoor/outdoor connecting wire for mis-wiring.

2.Take care of the following during servicing

1)Before servicing the air conditioner, be sure to turn off the unit first with the remote controller, and then after confirming the horizontal vane is closed, turn off the breaker and / or disconnect the power plug.

2)Be sure to turn OFF the power supply before removing the front panel, the cabinet, the top panel, and the electronic control P.C. board.

3)When removing the electronic control P.C. board, hold the edge of the board with care NOT to apply stress on the components.

4)When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires.

Lead wiring

Housing point

11

3.Troubleshooting procedure

1)First, check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality. To make sure, check how many times the abnormality indication is flashing on and off before starting service work.

2)Before servicing check that the connector and terminal are connected properly.

3)If the electronic control P.C. board is supposed to be defective, check the copper foil pattern for disconnection and the components for bursting and discoloration.

4)When troubleshooting, refer to 8-2., 8-3. and 8-4.

4.How to replace batteries

Weak batteries may cause the remote controller malfunction.

In this case, replace the batteries to operate the remote controller normally.

1Remove the front lid and insert batteries. Then reattach the front lid.

2Press RESET button with tip end of ball point pen or the like, and then use the remote controller.

Insert the negative pole of the

 

batteries first. Check if the polarity

RESET button

of the batteries is correct.

NOTE : 1. If RESET button is not pressed, the remote controller may not operate correctly.

2.This remote controller has a circuit to automatically reset the microcomputer when batteries are replaced. This function is equipped to prevent the microcomputer from malfunctioning due to the voltage drop caused by the battery replacement.

INFORMATION FOR MULTI SYSTEM AIR CONDITIONER OUTDOOR UNIT : MXZ series

Multi system air conditioner can connect two or more indoor units with one outdoor unit.

•Unit won’t operate in case the total capacity of indoor units exceeds the capacity of outdoor units. Do not connect indoor units beyond the outdoor unit capacity.

Operation indicator lamp flashes as shown in the figure below.

•When you try to operate two or more indoor units with one outdoor unit simultaneously, one for the cooling and the other for heating, the operation mode of the indoor unit that operates earlier is selected. The other indoor units cannot operate, indicating as shown in the figure below. In this case, please set all the indoor units to the same operation mode.

OPERATION INDICATOR Lighted

Blinking

Not lighted

•When indoor unit starts the operation while the defrosting of outdoor unit is being done, it takes a few minutes (max. 10 minutes) to blow out the warm air.

•In the heating operation, though indoor unit that does not operate may get warm or the sound of refrigerant flowing may be heard, they are not malfunction. The reason is that the refrigerant continuously flows into it.

12

8-2. Failure mode recall function

Outline of the function

This air conditioner can memorize the abnormal condition which has occurred once.

Even though LED indication listed on the troubleshooting check table (8-4.) disappears, the memorized failure details can be recalled.

This mode is very useful when the unit needs to be repaired for the abnormality which doesn't recur.

1. Flow chart of failure mode recall function for the indoor/outdoor unit

Those figures show about MSZ-A09/12/15/17.

Operational procedure

The cause of abnormality cannot be found because the abnormality doesn't recur.

Setting up the failure mode recall function

Turn ON the power supply. <Preparation of the remote controller>

1 While pressing both OPERATION SELECT

button and TOO COOL button on the remote controller at the same time, press RESET button.

2 First, release RESET button.

And release the other two buttons after all LCD in operation display section of the remote controller is displayed after 3 seconds.

Press OPERATE/STOP(ON/OFF) button of the remote controller (the set temperature is displayed) with the remote controller headed towards the indoor unit. W1

 

 

 

 

 

 

 

W1. Regardless of normal or abnormal condition, a short

 

Does the left lamp of OPERATION INDICATOR

No

 

 

beep is emitted once the signal is received.

 

 

 

 

 

lamp on the indoor unit blink at the interval of 0.5

 

Indoor unit is normal.

 

seconds?

 

 

(OFF)

 

But the outdoor unit might be abnormal because there are some

 

Blinks: Either indoor or outdoor unit is abnormal.

 

 

abnormalities that can't be recalled with this way.

 

 

 

Beep is emitted at the same timing

 

 

Confirm if outdoor unit is abnormal according to the detailed outdoor

 

as the blinking of the left lamp of

 

 

unit failure mode recall function.

 

OPERATION INDICATOR lamp. W2

 

 

 

 

 

 

 

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

Judgment of indoor/outdoor abnormality

 

(Blinks)

 

 

 

 

 

 

 

 

 

 

 

 

Before blinking, does the left lamp of

OPERATION INDICATOR lamp stay ON for 3 Yes seconds?

Stays ON for 3 seconds (without beep): The outdoor unit is abnormal.

No

The indoor unit is abnormal.

Check the blinking pattern, and confirm the abnormal point with the indoor unit failure mode table(8-2.2.).

Make sure to check at least two consecutive blinking cycles. W2

Releasing the failure mode recall function

Release the failure mode recall function by the following procedures.

Turn OFF the power supply and turn it ON again.

Press RESET button of the remote controller.

Repair the defective parts.

Deleting the memorized abnormal condition

The outdoor unit is abnormal.

Check the blinking pattern, and confirm the abnormal point with the outdoor unit failure mode table (Refer to outdoor unit service manual.) Make sure to check at least two consecutive blinking cycles. W3

1After repairing the unit, recall the failure mode again according to "Setting up the failure mode recall function" mentioned above.

2Press OPERATE/STOP(ON/OFF) button of the remote controller (the set temperature is displayed) with the remote controller headed towards the indoor unit.

3Press EMERGENCY OPERATION switch so that the memorized abnormal condition is deleted. 4Release the failure mode recall function according to "Releasing the failure mode recall function"

mentioned above.

Note1.Make sure to release the failure mode recall function once it's set up, otherwise the unit cannot operate properly. 2.If the abnormal condition is not deleted from the memory, the last abnormal condition is kept memorized.

W2. Blinking pattern when the indoor unit is abnormal:

 

 

 

Blinking at 0.5-

 

 

 

 

 

 

 

 

 

 

 

Blinking at 0.5-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.5-second OFF

second interval

 

 

2.5-second OFF second interval

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Beeps

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Beeps

 

 

 

 

 

 

 

Beeps

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Repeated cycle

 

 

 

 

 

 

 

Repeated cycle

 

 

Repeated cycle

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

W3.Blinking pattern when the outdoor unit is abnormal:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Blinking at 0.5-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Blinking at 0.5-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.5-second OFF

 

 

 

3-second ON

 

 

 

 

second interval

 

 

 

 

2.5-second OFF

3-second ON

 

second interval

ON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No beep

 

 

 

 

 

 

 

Beeps

 

 

 

 

 

 

 

 

 

 

 

 

No beep

 

 

 

 

 

Beeps

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Repeated cycle

 

 

 

 

 

 

 

 

 

 

 

 

Repeated cycle

 

 

 

 

 

 

 

 

 

 

Repeated cycle

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

13

2. Indoor unit failure mode table

Left lamp of OPERATION

Abnormal point

Condition

Correspondence

INDICATOR lamp

(Failure mode)

 

 

 

 

 

 

Not lighted

Normal

 

 

 

 

1-time flash

Room temperature

The room temperature thermistor short

Refer to the characteristics of the room

or open circuit is detected every 8

every 0.5-second

thermistor

temperature thermistor (8-7.).

seconds during operation.

 

 

 

 

 

 

 

2-time flash

 

The indoor coil thermistor short or open

Refer to the characteristics of the main

Indoor coil thermistor

circuit is detected every 8 seconds during

indoor coil thermistor, the sub indoor coil

2.5-second OFF

 

operation.

thermistor (8-7.).

 

 

 

 

 

 

3-time flash

Serial signal

The serial signal from outdoor unit is

Refer to 8-6.D "How to check mis-wiring

2.5-second OFF

not received for a maximum of 6 minutes.

and serial signal error".

 

 

 

 

 

11-time flash

 

The rotational frequency feedback

Refer to 8-6.A "Check of indoor fan

Indoor fan motor

signal is not emit during the 12 seconds the

2.5-second OFF

motor".

 

indoor fan operation.

 

 

 

 

 

 

 

12-time flash

 

It cannot properly read data in the

Replace the indoor electronic control

Indoor control system

nonvolatile memory of the indoor electronic

2.5-second OFF

P.C. board.

 

control P.C. board.

 

 

 

 

 

 

 

NOTE : Blinking patterns of this mode differ from the ones of Troubleshooting check table (8-4.).

14

8-3. Instruction of troubleshooting

Start

Indoor unit operates.

Indoor unit operates.

Outdoor unit

Outdoor unit doesn't

doesn't

operate normally.

operate.

Indoor unit

OPERATION INDICATOR

doesn't receive

lamp on the indoor unit is

the signal from

flashing on and off.

remote controller.

 

Outdoor unit

 

Outdoor unit

operates only

 

doesn't

in Test Run

 

operate

operation.

 

even in

 

w

 

Test Run

 

 

 

operation.

 

 

 

 

w

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check room

 

Refer to

temperature

 

"How to check

thermistor.

 

inverter/

Refer to 8-7.

 

compressor".

"Test point

 

 

 

diagram and

 

 

 

voltage".

 

 

 

 

 

 

 

 

Unit doesn't

 

Indoor unit

Indoor unit

 

operates, when

doesn't operate,

operate

 

 

EMERGENCY

when

normal

 

 

OPERATION

EMERGENCY

operation in

 

 

switch is pressed.

OPERATION

COOL or

 

 

 

 

switch is pressed.

HEAT mode.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Refer to

 

Refer to 8-6.B

 

1. Check indoor / outdoor

"Check of

 

"Check of

 

connecting wire.

 

 

(Check if the power

R.V. coil".

 

remote controller

 

 

 

is supplied to the

 

 

and receiver

 

indoor unit.)

 

 

P.C. board".

 

2. Refer to 8-6.C

 

 

 

 

"Check of indoor

 

 

 

 

electronic control

 

 

 

 

P.C. board and indoor

 

 

 

 

fan motor".

 

 

 

 

 

If blinking of OPERATION INDICATOR lamp cannot be checked, it can be checked with failure mode recall function.

w

"Test Run operation" means the operation within 30 minutes after EMERGENCY OPERATION switch is pressed.

Refer to outdoor unit service manual.

Left lamp

 

Left lamp

Flash on and off

 

2-time flash

at 0.5-second

 

Cause:

intervals

 

Indoor unit

Cause:

 

• Trouble of

Indoor/

 

room temp-

Outdoor unit

 

erature/

• Mis-wiring

 

indoor coil

or trouble

 

thermistor

of serial signal

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Refer to 8-6.

 

Check room

D "How to

 

temperature

check of

 

thermistor

mis-wiring

 

and indoor

and serial

 

coil thermis-

signal error".

 

tor.

 

 

 

Refer to 8-7.

 

 

 

"Test point

 

 

 

diagram and

 

 

 

voltage".

 

 

 

 

 

Left lamp

 

Left lamp

 

Left lamp

 

Left lamp

 

Left lamp

 

Left lamp

3-time flash

 

4-time flash

 

5-time flash

 

6-time flash

 

7-time flash

 

14-time flash

Cause:

 

Cause:

 

Cause:

 

Cause:

 

Cause:

 

Cause:

Indoor unit

 

Indoor unit

 

Outdoor unit

 

Outdoor unit

 

Outdoor unit

 

Outdoor unit

• Trouble of

 

• Trouble of

 

• Outdoor

 

• Trouble of

 

• Trouble of

 

• Other

indoor fan

 

indoor unit

 

power

 

thermistor

 

outdoor

 

abnormality

motor

 

control

 

system

 

in outdoor

 

control

 

 

 

 

 

 

system

 

abnormality

 

unit

 

system

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Refer to 8-6.

 

Replace the

 

Refer to

 

Refer to

 

Replace the

 

Check

A "Check of

 

indoor

 

"How to check

 

"Check of

 

inverter P.C.

 

"Flow chart of

indoor fan

 

electronic

 

inverter/

 

outdoor

 

board or

 

the detailed

motor".

 

control

 

compressor".

 

thermistors".

 

the outdoor

 

outdoor unit

 

 

P.C. board.

 

 

 

 

 

electronic

 

failure mode

 

 

 

 

 

 

 

 

control P.C.

 

recall function."

 

 

 

 

 

 

 

 

board.

 

 

 

 

 

 

 

 

 

 

 

 

 

15

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