MITSUBISHI ELECTRIC MLZ-KY06NA EZ FIT Recessed Ceiling User Manual

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2 PART NAMES AND FUNCTIONS

INDOOR UNIT MLZ-KY06NA

Air inlet Air outlet

Horizontal vane Vertical vane Intake grille

Air cleaning filter (Anti-allergy Enzyme
Filter, option)

Air filter (Air purifying filter)

Spec name plate Safety strings
Display section

ACCESSORIES
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Operation indicator lamp

Remote control receiving section Emergency operation switch

MODELS
(1) Alkaline battery (AAA) for remote controller (2) Drain hose (with insulation) (3) Special washer (with cushion, 4pcs) (4) Installation template (5) Fixing screw for (4) M5 30 mm (6) Band (7) Fixing screw for (6) 4 16 mm (8) Remote controller (9) Remote controller holder (10) Fixing screw for (9) 3.5 x 16 mm (Black)
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MLZ-KY06NA
2 1 8 1 4 1 2 1 1 2

3 SPECIFICATION

1. Multi connection

Indoor model

Power supply

V, phase, Hz

Max. fuse size (time delay)/ Disconnect switch A

Airflow High – Med. – Low – SLow

COOL Dry (Wet) CFM

HEAT Dry

CFM

Sound level High – Med. – Low – SLow

Cooling Heating

dB (A) dB (A)

Cond. drain connection O.D.

in.

W

Dimensions

D

in.

H

Weight

Ib.

External finish

Control voltage (by built-in transformer)

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

MLZ-KY06NA
208/230, 1, 60 15
198 – 184 – 166 – 152
212 – 194 – 173 – 152 36 – 34 – 31 – 29
37 – 35 – 32 – 29 ø1 (26 mm) 33-3/16 11-7/8 7-11/16 25 White 12 – 24 V DC

Specifications and rated conditions of main electric parts

Model Item

Fuse

(F11)

Horizontal vane motor

(MV1)

Vertical vane motor

(MV2)

Varistor

(NR11)

DRAIN PUMP

(DP)

DRAIN SENSOR

(DS)

MLZ-KY06NA
T3.15AL250V 12 V DC 12 V DC 470 V
230 V 6.4 W Thermistor 25°C 5.3k

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3-1. OPERATING RANGE (1) POWER SUPPLY

Rated voltage

Guaranteed voltage (V)

Indoor unit

208/230 V 1 phase
60 Hz

Min. 187 208 230 Max. 253

(2) OPERATION

*The operating range of the outdoor unit depends on the connected outdoor unit.

Intake air temperature (°F)

Mode

Condition

Indoor

Outdoor

DB

WB

DB

WB

Standard temperature

80

67

95

—

Cooling

Maximum temperature Minimum temperature

90 67

73

115

57

14

— —

Maximum humidity

78%

—

Standard temperature

70

60

47

43

Heating Maximum temperature

80

67

75

65

Minimum temperature

70

60

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3-2. OUTLET AIR SPEED AND COVERAGE Multi connection

Model

Mode Function

Airflow (CFM)

HEAT

Dry

198

MLZ-KY06NA

Dry

212

COOL

Wet

—

Air speed (ft./s.) 15.6
14.6
—

Coverage (ft.) 18.8 17.6 —

The air coverage is the figure up to the position where the air speed is 1 ft./s., when air is blown out horizontally from the unit properly at the High speed position. The coverage should be used only as a general guideline since it varies according to the size of the room and furniture arranged inside the room.

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4 OUTLINES AND DIMENSIONS
MLZ-KY06NA INDOOR UNIT

Unit: inch

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5 WIRING DIAGRAM
INDOOR UNIT MLZ-KY06NA- U1

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NOTES : 1.About the outdoor side electric wiring
refer to the outdoor unit electric wiring diagram for servicing. 2.Use copper conductors only. (For field wiring) 3.Symbols below indicate.

: Terminal block

: Connector

REMARQUES : 1.Pour le câblage électronique côté
extérieur, se reporter au schéma d’entretien du câblage électronique de l’appareil extérieur. 2.Utiliser des fils d’alimentation en cuivre. 3.Les symboles ont les significations suivantes

: Borne

: Connecteur

7

6 REFRIGERANT SYSTEM DIAGRAM
INDOOR UNIT MLZ-KY06NA

Refrigerant pipe ø3/8(ø9.52) (with heat insulator)

Indoor heat exchanger

Indoor coil thermistor RT12 (main)

Flared connection

Indoor coil thermistor RT13 (sub)

Unit: inch(mm)

Room temperature thermistor RT11

Flared connection
Refrigerant pipe ø1/4(ø6.35) (with heat insulator)

Refrigerant flow in cooling Refrigerant flow in heating

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7 SERVICE FUNCTIONS

MLZ-KY06NA

7-1. TIMER SHORT MODE · For service, the following set time can be shortened by bridging the timer short mode point on the electronic control P.C. board. (Refer to 9-7.) · The set time for the ON/OFF timer can be reduced to 1 second for each minute. · After the breaker is turned on, the time for starting the compressor, which normally takes 3 minutes, can be reduced to 3 seconds. Restarting the compressor, which takes 3 minutes, cannot be reduced.
7-2. HOW TO SET REMOTE CONTROLLER EXCLUSIVELY FOR A PARTICULAR INDOOR UNIT A maximum of 4 indoor units with wireless remote controllers can be used in a room. To operate the indoor units individually with each remote controller, assign a number to each remote controller according to the number of the indoor unit.
This setting can be set only when all the following conditions are met: · The remote controller is powered OFF. · Weekly timer is not set. · Weekly timer is not being edited.
1. How to modify the electronic control P.C. board Turn OFF the power supply before modification. To assign a number to each indoor unit , cut off “JR05” and “JR06” on the electronic control P.C. board as shown in Table 1. (Refer to 9-7.)
Table 1

Unit No. 1 Unit No. 2 Unit No. 3 Unit No. 4

JR05 No modification
Cut off JR05 No modification
Cut off JR05

JR06 No modification No modification
Cut off JR06 Cut off JR06

C111

IC101
JR05 JR06

2. How to set the remote controller

(1) Hold down

button on the remote controller for 2 seconds to enter the pairing mode.

(2) Press

button again and assign a number to each remote controller.

Each press of

button advances the number in the following order: 1 2 3 4.

(3) Press

button to complete the pairing setting.

After the setting, turn ON the power supply and with the remote controller headed towards the indoor unit, press the OFF/ ON (stop/operate) button. If 1 or 2 beeps is heard from the indoor unit, the setting is completed correctly. The remote controller that first sends a signal to an indoor unit will be regarded as the remote controller for the indoor
unit.
Once they are set, the indoor unit will only receive the signal from the assigned remote controller afterwards.

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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. “AUTO RESTART FUNCTION” automatically starts operation in the same mode just before the shutoff of the main power. Operation If the main power has been cut, the operation settings remain. 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 disable “AUTO RESTART FUNCTION” Turn off the main power for the unit. Cut the jumper wire to JR77 on the indoor electronic control P.C. board. (Refer to 9-7.)
C111
IC101
JR77 NOTE:
· The operation settings are memorized when 10 seconds has 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 tripping 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.

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7-4. P.C. BOARD MODIFICATION FOR CHANGING AIRFLOW VOLUME
Change Slide switch SW3 setting according to the height of ceiling.

Slide switch SW3

Normal

Increase airflow volume

Ceiling height

8.0 ft. (2.4 m) or below

above 8.0 ft. (2.4 m) and 9.0 ft. (2.7 m) or below

NOTE: When the ceiling is above 9.0 ft. (2.7 m), airflow volume may be insufficient even with the Slide switch (SW3) set to “increase airflow”.
How to change Dip switch (SW3) setting (Factory setting is normal) 1. Make sure that the breaker for air conditioner is turned OFF. 2. Remove the disp cover of the indoor unit. 3. Slide out the electronic control P.C. board, and switch up the slide switch (SW). 4. Put the electronic control P.C. board back to the original position, and install the disp cover. NOTE: · Perform static elimination before setting.

Electronic control P.C. board

Slide switch SW3

TB base Disp cover

Normal volume

7-5. P.C. BOARD MODIFICATION FOR CHANGING AIRFLOW DIRECTION ADJUSTMENT
The setting when the lower airflow is preferred in the Airflow direction (1) The angle of airflow direction (1) can be slightly lowered by changing SWV1 to normal when the lower airflow is preferred or the airflow causes the dirt on the ceiling.

(AUTO) (1)

(2)

(3)

(4)

(5) (SWING)

How to change Dip switch (SWV1) setting (Factory setting is up)

1. Make sure that the breaker for air conditioner is turned OFF.

2. Remove the disp cover of the indoor unit.

3. Slide out the electronic control P.C. board, and change the slide switch (SWV1) to normal.

4. Put the electronic control P.C. board back to the original position, and install the disp cover.

NOTE:

· Perform static elimination before setting.

Electronic control P.C. board

Slide switch SWV1

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TB base Disp cover

Normal

Up

(Airflow direction

is lowered.)

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8 MICROPROCESSOR CONTROL
MLZ-KY06NA WIRELESS REMOTE CONTROLLER
Signal transmitting section Distance of signal: About 20 ft. (6 m) Beep(s) is (are) heard from the indoor unit when the signal is received.

Operation display section Temperature buttons

Battery replacement indicator
Operation select button
OFF/ON (stop/operate) button
ECONO COOL button SLEEP button SMART SET button
Indication of remote controller model is on back

Operate the remote controller in the area where signal is received, and beep is heard.
90°
FAN speed control button WIDE VANE control button VANE control button TIME, TIMER set buttons Increase time Decrease time
WEEKLY TIMER set button
RESET button CLOCK button

NOTE: Last setting will be stored after the unit is turned OFF with the remote controller. Indoor unit receives the signal of the remote controller with beeps.

INDOOR UNIT DISPLAY SECTION
Operation Indicator lamp The operation indicator at the right side of the indoor unit indicates the operation state.
·The following indication applies regardless of shape of the indication.

Indication

Operation state

Room temperature

The unit is operating to reach the set temperature
The room temperature is approaching the set temperature

About 4°F(2°C) or more away from set temperature
About 2 to 4°F(1 to 2°C) from set temperature

Lit Blinking Not lit

Standby mode

(Refer to multi system

–

operation)

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8-1. COOL ( ) OPERATION (1) Press OFF/ON (stop/operate) button. OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone. (2) Select COOL mode with Operation select button. (3) Press Temperature buttons TEMP or button to select the desired temperature. The setting range is 61 – 88°F (16 31°C). 1. Coil frost prevention The compressor operational frequency is controlled by the temperature of the indoor heat exchanger to prevent the coil from frosting. When the temperature of indoor heat exchanger becomes too low, the coil frost prevention mode works. The indoor fan operates at the set speed and the compressor stops. This mode continues until the temperature of indoor heat exchanger rises. NOTE: Do not operate COOL mode at low outside temperature [less than 14°F (-10°C)]. Water condensed in the unit may drip and wet or damage furniture, etc.
8-2. DRY ( ) OPERATION (1) Press OFF/ON (stop/operate) button. OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone. (2) Select DRY mode with Operation select button. (3) The set temperature is determined from the initial room temperature. 1. Coil frost prevention Coil frost prevention works the same way as that in COOL mode. (8-1.1.)
8-3. FAN ( ) OPERATION (1) OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone. (2) Select FAN mode with Operation select button. (3) Select the desired fan speed. When AUTO, it becomes Low. Only indoor fan operates. Outdoor unit does not operate.
8-4. HEAT ( ) OPERATION
(1) Press OFF/ON (stop/operate) button. OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone.
(2) Select HEAT mode with Operation select button. (3) Press Temperature buttons TEMP or button to select the desired temperature. The setting range is 50°F(10°C) and
61 – 88°F (16 – 31°C). 1. Cold air prevention control
When the compressor is not operating or is starting, and the temperature of indoor heat exchanger and/or the room temperature is low or when defrosting is being done, the indoor fan will stop or rotate in Very Low speed. 2. Defrosting Defrosting starts when the temperature of outdoor heat exchanger becomes too low. The compressor stops once, the indoor/outdoor fans stop, the 4-way valve reverses, and the compressor re-starts. This mode continues until the temperature of outdoor heat exchanger rises or the fixed time passes.
8-5. AUTO CHANGE OVER ··· AUTO MODE OPERATION Once desired temperature is set, unit operation is switched automatically between COOL and HEAT operation. Mode selection (1) Initial mode When unit starts the operation with AUTO operation from OFF: · If the room temperature is higher than the set temperature, operation starts in COOL mode. · If the room temperature is equal to or lower than the set temperature, operation starts in HEAT mode. (2) Mode change COOL mode changes to HEAT mode when about 15 minutes have passed with the room temperature 4°F (2°C) below the set temperature. HEAT mode changes to COOL mode when about 15 minutes have passed with the room temperature 4°F (2°C) above the set temperature. NOTE 1 If 2 or more indoor units are operating in multi system, there might be a case that the indoor unit, which is operating in (AUTO), cannot change over to the other operating mode (COOL HEAT) and becomes a state of standby. Refer to NOTE 2 “FOR MULTI SYSTEM AIR CONDITIONER”.

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NOTE 2 FOR MULTI SYSTEM AIR CONDITIONER OUTDOOR UNIT: MXZ series
Multi system air conditioner can connect 2 or more indoor units with one outdoor unit. · When you try to operate 2 or more indoor units with one outdoor unit simultaneously, one for the cooling and the others for heating, the operation mode of the indoor unit that operates first is selected. Other indoor units cannot operate, and operation indicator lamp blinks as shown in the figure below. In this case, please set all the indoor units to the same operation mode. OPERATION INDICATOR
Lit
Blinking
Not lit
· 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.
8-6. AUTO VANE OPERATION
1. Horizontal vane (1) Vane motor drive These models are equipped with a stepping motor for the horizontal vane. The rotating direction, speed, and angle of the motor are controlled by pulse signals (approximately 12 V) transmitted from indoor microprocessor. (2) The horizontal vane angle and mode change as follows by pressing VANE CONTROL button.

(AUTO) (1)

(2)

(3)

(4)

(5) (SWING)

NOTE: The setting when the higher airflow is preferred in the Airflow direction (1) The angle of airflow direction (1) can be slightly heightened by changing SWV1 to up. (Refer to 7-5. P.C. BOARD MODIFICATION FOR CHANGING AIRFLOW DIRECTION ADJUSTMENT.) However, it may cause the dirt on the ceiling. Factory setting is normal. (3) Positioning
To confirm the standard position, the vane moves until it touches the vane stopper. Then the vane is set to the selected angle. Confirming of standard position is performed in the following cases: (a) When the power supply turns on. (b) When the operation starts or finishes (including timer operation). (c) When the test run starts. (d) When multi-standby starts or finishes. (e) When the swing operation finishes.
(4) VANE AUTO ( ) mode In VANE AUTO mode, the microprocessor automatically determines the vane angle and operation to make the optimum room-temperature distribution.

(1) In COOL and DRY operation

Vane angle is fixed to Angle 1.

1

(2) In HEAT operation

Vane angle is fixed to Angle 4.

4

(5) STOP (operation OFF) and ON TIMER standby In the following cases, the horizontal vane returns to the closed position. (a) When OFF/ON (stop/operate) button is pressed (POWER OFF). (b) When the operation is stopped by the emergency operation. (c) When ON TIMER is ON standby.

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(6) SWING ( ) mode By selecting SWING mode with VANE CONTROL button, the horizontal vanes swing vertically. When COOL, DRY or FAN mode is selected, only the upper vane swings.
(7) Cold air prevention in HEAT operation The horizontal vane position is set to Upward.
(8) ECONO COOL ( ) operation (ECONOmical operation) When ECONO COOL button is pressed in COOL mode, set temperature is automatically set 4°F(2°C) higher by microprocessor. However, the temperature on the LCD screen on the remote controller is not changed. Also the horizontal vane swings in various cycle. SWING operation makes you feel cooler than set temperature. So, even though the set temperature is higher, the air conditioner can keep comfort. As a result, energy can be saved. To cancel this operation, select a different mode or press one of the following buttons in ECONO COOL operation: ECONO COOL, WIDE VANE CONTROL or VANE CONTROL button.
2. Vertical vane (1) Press WIDE VANE CONTROL button to change horizontal airflow direction. ·The vertical vane moves for about 30 seconds. (After 30 seconds, the vertical vane moves to its original position. In this case, press WIDE VANE CONTROL button again.) (2) Press WIDE VANE CONTROL button again to set horizontal airflow direction. ·The vertical vane stops and the airflow direction is set. (3) Positioning To confirm the standard position, the vane moves until it touches the vane stopper. Then the vane set to the desired angle. Confirming of standard position is performed in the following cases: (a) When OFF/ON (stop/operate) button is pressed (POWER ON). (b) When SWING is started.
8-7. DRAIN PUMP CONTROL 1. Drain pump
Operating condition: 1. During COOL, DRY, or emergency COOL operation 2. When the drain sensor detects the water level above the fixed point during the following states:
(a) Standby during multi system operation (b) Standby while the ON timer is set (c) Operation stop 3. When there is a failure on the drain sensor
Drain pump operates in conditions 1,2 or 3.
Stop conditions: States other than 1 or 2 indicated above

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8-8. TIMER OPERATION
1. How to set the time (1) Check that the current time is set correctly. NOTE: Timer operation will not work without setting the current time. Initially “0:00″ blinks at the current time display of TIME MONITOR, so set the current time correctly with CLOCK SET button. How to set the current time (a) Press the CLOCK set button.
(b) Press the TIME SET buttons ( and ) to set the current time.
· Each time FORWARD button ( ) is pressed, the set time increases by 1 minute, and each time BACKWARD
button ( ) is pressed, the set time decreases by 1 minute. · Pressing those buttons longer, the set time increases/decreases by 10 minutes. (c) Press the CLOCK set button. (2) Press OFF/ON (stop/operate) button to start the air conditioner. (3) Set the time of timer. ON timer setting (a) Press ON TIMER button( ) during operation.
(b) Set the time of the timer using TIME SET buttons ( and ). *

OFF timer setting (a) Press OFF TIMER button (

) during operation.

(b) Set the time of the timer using TIME SET buttons ( and ). *

• Each time FORWARD button ( ) is pressed, the set time increases by 10 minutes: each time BACKWARD but-

ton ( ) is pressed, the set time decreases by 10 minutes.

2. To release the timer

To release ON timer, press ON TIMER button ( ).

To release OFF timer, press OFF TIMER button( ).

TIMER is cancelled and the display of set time disappears.

PROGRAM TIMER

· OFF timer and ON timer can be used in combination. The set time that is reached first will operate first. · ” ” and ” ” display shows the order of OFF timer and ON timer operation.

(Example 1) The current time is 8:00 PM.

(Example 2) The current time is 11:00 AM.

The unit turns off at 11:00 PM, and on at 6:00 AM.

The unit turns on at 5:00 PM, and off at 9:00 PM.

NOTE: If the main power is turned OFF or a power failure occurs while ON/OFF timer is active, the timer setting is cancelled. As these models are equipped with an auto restart function, the air conditioner starts operating with timer
cancelled when power is restored.

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8-9. WEEKLY TIMER OPERATION

· A maximum of 4 ON or OFF timers can be set for individual days of the week. · A maximum of 28 ON or OFF timers can be set for a week.

E.g. : Runs at 75°F (24°C) from waking up to leaving home, and runs at 81°F (27°C) from getting home to going to bed on weekdays. Runs at 81°F (27°C) from waking up late to going bed early on weekends.

Mon

Setting1

ON

Setting2 OFF

~

75°F (24°C)

Fri

AM 6:00

AM 8:30

Setting1 Sat
ON

~

Sun

AM 8:00

Setting3

Setting4

ON

OFF

81°F (27°C)

PM 5:30

PM 10:00

81°F (27°C)

Setting2 OFF

PM 9:00

NOTE:
· The simple ON/OFF timer setting is available while the weekly timer is on. In this case, the ON/OFF timer has priority over the weekly timer; the weekly timer operation will start again after the simple ON/OFF timer is complete.
· When the weekly timer is set, temperature cannot be set to 50°F(10°C). · The weekly timer operation and SMART SET operation cannot be used together.

1. How to set the weekly timer

• Make sure that the current time and day are set correctly.

(1) Press

button to enter the weekly timer setting mode.

blinks.

(2) Press

and

buttons to select setting days and/or numbers.

E.g. : [Mon Tue … Sun] and [1] are selected.

Pressing

selects the day of

the week to be set.

Pressing

selects

the setting number.

• All days can be selected.

(3) Press

, , and buttons to set ON/OFF, time, and temperature.

E.g. : [ON], [6:00] and [75°F(24°C)] are selected.

Pressing selects ON/OFF timer.

Pressing

Pressing

Pressing deletes timer setting.

adjusts the time.

adjusts the temperature.

• Hold down the button to change the time quickly. * The temperature can be set between 61°F and 88°F (16°C and 31°C) at weekly timer.

Press

and

buttons to continue setting the timer for other days and/or numbers.

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(4) Press

button to complete and transmit the weekly timer setting.

which was blink-

ing goes out, and the

current time will be

displayed.

NOTE:

· Press

button to transmit the setting information of weekly timer to the indoor unit. Point the remote controller toward the

indoor unit for 3 seconds.

· When setting the timer for more than one day of the week or one number,

button does not have to be pressed per each

setting. Press

button once after all the settings are complete. All the weekly timer settings will be saved.

· Press

button to enter the weekly timer setting mode, and press and hold

button for 5 seconds to erase all weekly

timer settings. Point the remote controller toward the indoor unit.

(5) Press button to turn the weekly timer ON. ( lights.)

·When the weekly timer is ON, the day of the week whose timer setting is complete, will light.

Press button again to turn the weekly timer OFF. ( goes out.)

NOTE: The saved settings will not be cleared when the weekly timer is turned OFF.

2. Checking weekly timer setting

(1) Press

button to enter the weekly timer setting mode.

• blinks.

(2) Press

or

buttons to view the setting of the particular day or number.

(3) Press

button to exit the weekly timer setting.

8-10. SMART SET ( ) OPERATION 1. How to set SMART SET operation (1) Press OFF/ON (stop/operate) button. (2) Select COOL or HEAT mode. (3) Press SMART SET button. (4) Set the temperature, fan speed, and airflow direction for SMART SET operation. NOTE: · SMART SET operation cannot be selected during DRY, FAN or AUTO mode operation. · The setting range of HEAT mode SMART SET operation is 50°F (10°C) and 61 – 88°F (16 – 31°C). · 2 groups of setting can be saved. (One for COOL, one for HEAT) · SMART SET operation and the weekly timer operation cannot be used together. · SMART SET operation and SLEEP operation cannot be set at the same time 2. How to cancel operation · Press SMART SET button again. · SMART SET operation can also be cancelled by pressing Operation select button to change the operation mode. The preferred setting can be saved for the next time with a single press of SMART SET button.

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8-11. SLEEP ( ) OPERATION
1. How to set SLEEP operation (1) Press OFF/ON (stop/operate) button. (2) Select COOL, DRY, HEAT or FAN mode.

(3) Press SLEEP (

) button.

(4) PRESS Temperature buttons [ operation.

(Increase) and

(Decrease) ] to set the temperature of SLEEP

Fan speed:

AUTO

Horizontal vane:

Position set on the remote controller

Operation indicator lamp: Dimly lit

· Once the above procedure is completed, the settings will be saved.

· After the settings are saved, a single push of SLEEP (

) button during operation activates SLEEP operation with the

same settings every time. · Temperature for SLEEP operation cannot be set during DRY or FAN mode. Set temperature for SLEEP operation

For about 30 minutes after SLEEP (

) button is pressed, the set temperature remains as set for the operation running

when SLEEP button is pressed. It will change to the set temperature for SLEEP operation in about 30 minutes.

Pressing SLEEP (

) button again returns the operation to the previous settings.

is pressed.

is pressed.

Set temperature for the operation before SLEEP operation

Set temperature for SLEEP operation

Set temperature for the operation before SLEEP operation

For about 30 minutes

NOTE: · ON/OFF timer is available during SLEEP operation. · When a preset ON time for the weekly timer becomes during SLEEP operation, the weekly timer operation has priority. SLEEP
operation will be cancelled, and the operation set on the weekly timer will start.

2. How to cancel operation

· Press SLEEP (

) button again.

· The operation returns to the previous settings. · SLEEP operation is also cancelled when the FAN button is pressed or the operation mode is changed.

NOTE: SLEEP operation and SMART SET operation cannot be set at same time.

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8-12. EMERGENCY/TEST OPERATION In the case of test run operation or emergency operation, use the emergency operation switch on the right side of the indoor unit. Emergency operation is available when the remote controller is missing or has failed, or the batteries in the remote controller are running down. The unit will start and OPERATION INDICATOR lamp will light up. The first 30 minutes of operation is the test run operation. This operation is for servicing. The indoor fan runs at High speed and the temperature control does not work. After 30 minutes of test run operation, the system shifts to EMERGENCY COOL/HEAT MODE with a set temperature of 75°F(24°C). The fan speed shifts to Medium. The coil frost prevention works even in the test run or the emergency operation. In the test run or emergency operation, the horizontal vane operates in VANE AUTO ( ) mode. Emergency operation continues until the emergency operation switch is pressed once or twice or the unit receives any signal from the remote controller. In the latter case normal operation will start.
NOTE: Do not press the emergency operation switch during normal operation.

Operation indicator lamp

Remote control receiving section

Emergency operation switch

Operation mode COOL/HEAT Set temperature 75°F(24°C)

Fan speed

Medium

Horizontal vane

Auto

The operation mode is indicated by the Operation Indicator lamp as following

Operation Indicator lamp
EMERGENCY COOL

EMERGENCY HEAT

STOP

Lit Not lit

8-13. 3-MINUTE TIME DELAY OPERATION When the system turns OFF, compressor will not restart for 3 minutes as 3-minute time delay function operates to protect compressor from overload.

8-14. Changing temperature indication (°F/°C) · The preset unit is °F.
· °F °C: Press RESET button while the Temperature buttons are pressed. · °C °F: Press RESET button while the Temperature buttons are pressed.

Press RESET button gently using a fine-tipped object.

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9 TROUBLESHOOTING

MLZ-KY06NA

9-1. CAUTIONS ON TROUBLESHOOTING 1. Before troubleshooting, check the following: 1) Check the power supply voltage. 2) Check the indoor/outdoor connecting wire for miswiring. 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 connector housing. DO NOT pull the lead wires.