Mitsubishi Electronics MSY-GE15NA, MSY-GE12NA, MSY18NA, MSY-GE09NA, MSZGE15NA User Manual

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SPLIT-TYPE AIR CONDITIONERS

INDOOR UNIT

SERVICE MANUAL

Models

MSZ-GE06NA MSZ-GE09NA MSZ-GE12NA MSZ-GE15NA

No. OBH548

MSZ-GE18NA MSY-GE09NA MSY-GE12NA MSY-GE15NA MSY-GE18NA

Outdoor unit service manual

MUZ-GE•NA MUY-GE•NA Series (OBH549)

MXZ-A·NA Series (OB444)

CONTENTS

1. TECHNICAL CHANGES

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

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

4. OUTLINES AND DIMENSIONS ························5

5. WIRING DIAGRAM ············································6

6. REFRIGERANT SYSTEM DIAGRAM ···············7

7. SERVICE FUNCTIONS ·····································8

8. MICROPROCESSOR CONTROL ···················10

9. TROUBLESHOOTING ·····································16

10. DISASSEMBLY INSTRUCTIONS ···················· 28

·······································

NOTE:

RoHS compliant products have <G> mark on the spec name plate.

PARTS CATALOG (OBB548)

TECHNICAL CHANGES

MSZ-GE06NA MSZ-GE09NA MSZ-GE12NA MSZ-GE15NA MSZ-GE18NA MSY-GE09NA MSY-GE12NA MSY-GE15NA MSY-GE18NA

1. New model

PART NAMES AND FUNCTIONS

MSZ-GE06NA MSZ-GE09NA MSZ-GE12NA MSZ-GE15NA MSZ-GE18NA MSY-GE09NA MSY-GE12NA MSY-GE15NA MSY-GE18NA

Air ﬁlter (Catechin air ﬁlter)

Air cleaning ﬁlter (Anti-Allergy Enzyme Filter)

Air inlet

Air outlet

Horizontal vane

Remote control receiving section

Front panel

Heat exchanger

Remote controller

ACCESSORIES

Installation plate 1 Installation plate ﬁ xing screw 4 × 25 mm 5 Remote controller holder 1 Fixing screw for 3.5 × 1.6 mm (Black) 2 Battery (AAA) for remote controller 2 Wireless remote controller 1 Felt tape (Used for left or left-rear piping) 1

Operation indicator lamp

Emergency operation switch (E.O. SW)

SPECIFICATION

Indoor model MSZ-GE06NA

Power supply V, phase, Hz 208/230, 1, 60 Max. fuse size (time delay)/ Disconnect switch Min. circuit ampacity A 1.0 Fan motor F.L.A 0.76

Airﬂ ow Super High - High - Med. Low - Quiet

Moisture removal pt./h – 1.5 2.5 Sound level

Super High - High - Med. Low - Quiet

Cond. drain connection O.D. in. 5/8

Dimensions

Weight Ib. 22 External ﬁ nish Munsell 1.0Y 9.2/0.2 Control voltage (by built-in transformer) 12 - 24 VDC

Indoor model

Power supply V, phase, Hz 208/230, 1, 60 Max. fuse size (time delay)/ Disconnect switch Min. circuit ampacity A 1.0 Fan motor F.L.A 0.76

Airﬂ ow Super High - High - Med. Low - Quiet

Moisture removal pt./h 2.7 4.6 Sound level

Super High - High - Med. Low - Quiet

Cond. drain connection O.D. in. 5/8

Dimensions

Weight Ib. 22 External ﬁ nish Munsell 1.0Y 9.2/0.2 Control voltage (by built-in transformer) 12 - 24 VDC

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

COOL Dry

HEAT Dry CFM 406-321-233-170-145 406-321-237-170-145

Cooling dB(A)

Heating dB(A) 43-37-30-22-19

W D 9-1/8 H 11-5/8

COOL Dry

HEAT Dry CFM 463-367-304-247-205 512-431-339-275-230

Cooling dB(A) 49-44-38-32-26 49-44-38-33-28

Heating dB(A) 46-40-35-30-26 48-43-38-33-28

W D 9-1/8 H 11-5/8

A15

CFM

(Wet)

43-37-30-22-19

in.

MSZ-GE15NA MSY-GE15NA

A15

(Wet)

CFM

in.

533-420-335-272-205

(498-385-300-237-170)

MSZ-GE09NA MSY-GE09NA

399-321-237-170-145

(364-286-201-134-109)

31-7/16

533-420-339-275-230

( 498-385-304-240-194)

31-7/16

MSZ-GE12NA MSY-GE12NA

45-37-30-22-19

MSZ-GE18NA MSY-GE18NA

3-1. OPERATING RANGE

(1) POWER SUPPLY

Rated voltage Guaranteed voltage (V)

Min. 187

Indoor unit

208/230 V

1 phase

60 Hz

(2) OPERATION

Mode Condition

Standard temperature 80 67 95 —

Cooling

Heating

Maximum temperature 90 73 115 — Minimum temperature 67 57 14 — Maximum humidity 78% — Standard temperature 70 60 47 43 Maximum temperature 80 67 75 65 Minimum temperature 70 60 -4 -5

3-2. OUTLET AIR SPEED AND COVERAGE

Model Mode Function

HEAT Dry 406 20.6 29.5

MSZ-GE06NA

MSZ-GE09NA MSY-GE09NA

MSZ-GE12NA MSY-GE12NA

MSZ-GE15NA MSY-GE15NA

MSZ-GE18NA MSY-GE18NA

COOL

HEAT Dry 406 20.6 29.5

COOL

HEAT Dry 406 20.6 29.5

COOL

HEAT Dry 463 23.4 33.5

COOL

HEAT Dry 512 25.9 36.9

COOL

Dry 321 16.3 23.5

Wet 286 14.5 21.0

Dry 321 16.3 23.5

Wet 286 14.5 21.0

Dry 321 16.3 23.5

Wet 286 14.5 21.0

Dry 420 21.3 30.5

Wet 385 19.5 28.0

Dry 420 21.3 30.5

Wet 385 19.5 28.0

Airﬂ ow

(CFM)

208 230

Indoor Outdoor

DB WB DB WB

Air speed

(ft./s.)

Max. 253

Intake air temperature (°F)

Coverage

● The air coverage is the figure up to the

(ft.)

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.

OUTLINES AND DIMENSIONS

MSZ-GE06NA MSZ-GE09NA MSZ-GE12NA MSZ-GE15NA MSZ-GE18NA MSY-GE09NA MSY-GE12NA MSY-GE15NA MSY-GE18NA

3/16

2-3/4

1-3/4

2- 5/16

2-3/16

6 - 1/4

9-1/8

3/4

11-5/8

1-11/16

2-3/16

7/16×1 Oblong hole

Installation plate

31-7/16

30-15/16 1/4

Indoor unit

5-1/824-3/81-15/16

1-15/16

3-1/8

8-3/8

1-5/8

5/16

3-15/16

Air out

Insulation ø1 - 3/8 O.D

1-5/8

Liquid line ø1/4 19 - 11/16 (Flared connection ø1/4)

Gas line ø3/8 16 - 15/16

Piping

Drain hose Insulation ø1-1/8 O.D Connected part ø5/8 O.D

8-7/8 8-7/8

6-1/8 6-1/8

13-5/162-3/8

13-9/16 2-1/8

Air in

Installation plate

Piping

1-5/8

4/3/16

4-3/8

(Flared connection: ø3/8 (GE06/09/12NA), ø1/2 (GE15/18NA))

2-3/16

7/16×13/16 Oblong hole

3-1/8

Wall hole ø2-9/16

Drain hose

2-11/16

Unit: inch

7/8

9-15/16

9-1/8

8-5/16

1/8

1-5/8

MSZ-GE06NA MSZ-GE09NA MSZ-GE12NA MSZ-GE15NA MSZ-GE18NA MSY-GE09NA MSY-GE12NA MSY-GE15NA MSY-GE18NA

WIRING DIAGRAM

REFRIGERANT SYSTEM DIAGRAM

MSZ-GE06NA MSZ-GE09NA MSZ-GE12NA MSZ-GE15NA MSZ-GE18NA MSY-GE09NA MSY-GE12NA MSY-GE15NA MSY-GE18NA

Refrigerant pipe ø3/8 (MSZ-GE06/09/12NA, MSY-GE09/12NA) ø1/2 (MSZ-GE15/18NA, MSY-GE15/18NA) (with heat insulator)

Indoor heat exchanger

Room temperature thermistor RT11

Indoor coil thermistor RT12 (main)

Indoor coil thermistor RT13 (sub)

Flared connection

Refrigerant pipe ø1/4 (with heat insulator)

Unit: inch

Refrigerant flow in cooling Refrigerant flow in heating

SERVICE FUNCTIONS

MSZ-GE06NA MSZ-GE09NA MSZ-GE12NA MSZ-GE15NA MSZ-GE18NA MSY-GE09NA MSY-GE12NA MSY-GE15NA MSY-GE18NA

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 9-7.) 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 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 modiﬁ cation 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.

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 shut-off 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 release “AUTO RESTART FUNCTION”

Turn OFF the main power of the unit. Solder the Jumper wire JR07 on the indoor electronic control P.C. board. (Refer to 9-7.)

Indoor electronic control P.C. board

JR07

CN 111CN112CN151CN10A

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.

MICROPROCESSOR CONTROL

MSZ-GE06NA MSZ-GE09NA MSZ-GE12NA MSZ-GE15NA MSZ-GE18NA MSY-GE09NA MSY-GE12NA MSY-GE15NA MSY-GE18NA

WIRELESS REMOTE CONTROLLER

Signal transmitting section

Operation display section

OPERATE/STOP (ON/OFF) button

Temperature buttons

E.g.: MSZ type

FAN SPEED CONTROL button

OPERATION SELECT button

ECONO COOL button

VANE CONTROL button

SMART SET button

RESET button

Indication of remote controller model is on back

OFF TIMER button

ON TIMER button

TIME SET buttons FORWARD button BACKWARD button

CLOCK SET 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

Standby mode (Only during multi system operation)

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

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

Lighted

Blinking

Not lighted

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