Mitsubishi Electric Mr. Slim MSZ-GE06NA User manual

SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES······································· 2
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
No. OBH548
SPLIT-TYPE AIR CONDITIONERS
INDOOR UNIT
Outdoor unit service manual
MUZ-GE•NA MUY-GE•NA Series (OBH549)
MXZ-A·NA Series (OB444)
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
PARTS CATALOG (OBB548)
Models
MSZ-GE06NA
MSZ-GE09NA
MSZ-GE12NA
MSZ-GE15NA
MSZ-GE18NA
MSY-GE09NA
MSY-GE12NA
MSY-GE15NA
MSY-GE18NA

2
MSZ-GE06NA MSZ-GE09NA MSZ-GE12NA MSZ-GE15NA MSZ-GE18NA
MSY-GE09NA MSY-GE12NA MSY-GE15NA MSY-GE18NA
1. New model
1TECHNICAL CHANGES
MSZ-GE06NA MSZ-GE09NA MSZ-GE12NA MSZ-GE15NA MSZ-GE18NA
MSY-GE09NA MSY-GE12NA MSY-GE15NA MSY-GE18NA
ACCESSORIES
Installation plate 1
Installation plate fixing 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
Remote controller
Operation indicator lamp
Remote control receiving section
Emergency operation switch (E.O. SW)
Horizontal vane
Air outlet
Air filter
(Catechin air filter)
Air inlet
Heat exchanger
Front panel
Air cleaning filter
(Anti-Allergy Enzyme
Filter)
2PART NAMES AND FUNCTIONS

3
Indoor model MSZ-GE06NA MSZ-GE09NA
MSY-GE09NA MSZ-GE12NA MSY-GE12NA
Power supply V, phase, Hz 208/230, 1, 60
Max. fuse size (time delay)/ Disconnect switch A15
Min. circuit ampacity A 1.0
Fan motor F.L.A 0.76
Airflow
Super High - High - Med. -
Low - Quiet
COOL Dry
(Wet)
CFM 399-321-237-170-145
(364-286-201-134-109)
HEAT Dry CFM 406-321-233-170-145 406-321-237-170-145
Moisture removal pt./h – 1.5 2.5
Sound level
Super High - High - Med. -
Low - Quiet
Cooling dB(A) 43-37-30-22-19 45-37-30-22-19
Heating dB(A) 43-37-30-22-19
Cond. drain connection O.D. in. 5/8
Dimensions
W
in.
31-7/16
D 9-1/8
H 11-5/8
Weight Ib. 22
External finish Munsell 1.0Y 9.2/0.2
Control voltage (by built-in transformer) 12 - 24 VDC
Indoor model MSZ-GE15NA
MSY-GE15NA MSZ-GE18NA MSY-GE18NA
Power supply V, phase, Hz 208/230, 1, 60
Max. fuse size (time delay)/ Disconnect switch A15
Min. circuit ampacity A 1.0
Fan motor F.L.A 0.76
Airflow
Super High - High - Med. -
Low - Quiet
COOL Dry
(Wet)
CFM 533-420-335-272-205
(498-385-300-237-170)
533-420-339-275-230
( 498-385-304-240-194)
HEAT Dry CFM 463-367-304-247-205 512-431-339-275-230
Moisture removal pt./h 2.7 4.6
Sound level
Super High - High - Med. -
Low - Quiet
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
Cond. drain connection O.D. in. 5/8
Dimensions
W
in.
31-7/16
D 9-1/8
H 11-5/8
Weight Ib. 22
External finish 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.
3SPECIFICATION

4
3-2. OUTLET AIR SPEED AND COVERAGE
●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 posi-
tion.
The coverage should be used only as a
general guideline since it varies accord-
ing to the size of the room and furniture
arranged inside the room.
(2) OPERATION
Mode Condition
Intake air temperature (°F)
Indoor Outdoor
DB WB DB WB
Cooling
Standard temperature 80 67 95 —
Maximum temperature 90 73 115 —
Minimum temperature 67 57 14 —
Maximum humidity 78% —
Heating
Standard temperature 70 60 47 43
Maximum temperature 80 67 75 65
Minimum temperature 70 60 -4 -5
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
Model Mode Function Airflow
(CFM)
Air speed
(ft./s.)
Coverage (ft.)
MSZ-GE06NA
HEAT Dry 406 20.6 29.5
COOL Dry 321 16.3 23.5
Wet 286 14.5 21.0
MSZ-GE09NA
MSY-GE09NA
HEAT Dry 406 20.6 29.5
COOL Dry 321 16.3 23.5
Wet 286 14.5 21.0
MSZ-GE12NA
MSY-GE12NA
HEAT Dry 406 20.6 29.5
COOL Dry 321 16.3 23.5
Wet 286 14.5 21.0
MSZ-GE15NA
MSY-GE15NA
HEAT Dry 463 23.4 33.5
COOL Dry 420 21.3 30.5
Wet 385 19.5 28.0
MSZ-GE18NA
MSY-GE18NA
HEAT Dry 512 25.9 36.9
COOL Dry 420 21.3 30.5
Wet 385 19.5 28.0

5
Unit: inch
MSZ-GE06NA MSZ-GE09NA MSZ-GE12NA MSZ-GE15NA MSZ-GE18NA
MSY-GE09NA MSY-GE12NA MSY-GE15NA MSY-GE18NA
8-5/16
9-1/8
9-15/16
7/8
6-1/8 6-1/8
3-1/8
3-1/8 8-7/8 8-7/8
1/8
3/4
6 - 1/4
2- 5/16
3/16 9-1/8
2-3/16 2-3/4
31-7/16
30-15/16 1/4
5-1/824-3/81-15/16
11-5/8
1-15/16
1-5/8
2-3/16
1-11/16
1-5/8
5/16
3-15/16
4/3/16
4-3/8
1-3/4
2-3/16
2-11/16
13-5/162-3/8
8-3/8
10
1-5/8
1-5/8
13-9/16 2-1/8
7/16×1 Oblong hole 7/16×13/16 Oblong hole
Installation plate
Indoor unit Wall hole ø2-9/16
Air in
Air out
Installation plate
Piping
Drain hose
Piping
Insulation ø1 - 3/8 O.D
Liquid line ø1/4 19 - 11/16 (Flared connection ø1/4)
Gas line ø3/8 16 - 15/16
(Flared connection: ø3/8 (GE06/09/12NA), ø1/2 (GE15/18NA))
Drain hose Insulation ø1-1/8 O.D Connected part ø5/8 O.D
4OUTLINES AND DIMENSIONS

6
MSZ-GE06NA MSZ-GE09NA MSZ-GE12NA MSZ-GE15NA MSZ-GE18NA
MSY-GE09NA MSY-GE12NA MSY-GE15NA MSY-GE18NA
5WIRING DIAGRAM

7
MSZ-GE06NA MSZ-GE09NA MSZ-GE12NA MSZ-GE15NA MSZ-GE18NA
MSY-GE09NA MSY-GE12NA MSY-GE15NA MSY-GE18NA Unit: inch
Indoor
heat
exchanger
Flared connection
Room temperature
thermistor
RT11
Flared connection
Refrigerant pipe ø3/8 (MSZ-GE06/09/12NA, MSY-GE09/12NA)
ø1/2 (MSZ-GE15/18NA, MSY-GE15/18NA)
(with heat insulator)
Refrigerant pipe ø1/4
(with heat insulator)
Indoor coil
thermistor
RT12 (main)
Indoor coil
thermistor
RT13 (sub)
Refrigerant flow in cooling
Refrigerant flow in heating
6REFRIGERANT SYSTEM DIAGRAM

8
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:
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.
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.
J2
J1
MSZ-GE06NA MSZ-GE09NA MSZ-GE12NA MSZ-GE15NA MSZ-GE18NA
MSY-GE09NA MSY-GE12NA MSY-GE15NA MSY-GE18NA
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.
7SERVICE FUNCTIONS

9
CN111CN112CN151CN10A
Indoor electronic
control P.C. board
JR07
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.
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.)

10
WIRELESS REMOTE CONTROLLER
MSZ-GE06NA MSZ-GE09NA MSZ-GE12NA MSZ-GE15NA MSZ-GE18NA
MSY-GE09NA MSY-GE12NA MSY-GE15NA MSY-GE18NA
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.
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
About 4°F(2°C) or more
away from set tempera-
ture
The room temperature is
approaching the set tem-
perature
About 2 to 4°F(1 to 2°C)
from set temperature
Standby mode
(Only during multi system
operation)
-
INDOOR UNIT DISPLAY SECTION
Lighted
Blinking
Not lighted
ON TIMER button
CLOCK SET button
TIME SET buttons
FORWARD button
BACKWARD button
OFF TIMER button
RESET button
SMART SET button
VANE CONTROL button
Signal transmitting section
Operation display section
Temperature buttons
OPERATE/STOP
(ON/OFF) button
FAN SPEED CONTROL button
OPERATION SELECT button
ECONO COOL button
Indication of
remote controller
model is on back
8MICROPROCESSOR CONTROL
E.g.: MSZ type