Mitsubishi Electric MSZ-GS06NA - U1 User manual

Models
MSZ-GS06NA -U1 MSY-GS09NA -U1
MSZ-GS09NA -U1 MSY-GS12NA -U1
MSZ-GS12NA -U1 MSY-GS15NA -U1
MSZ-GS15NA -U1 MSY-GS18NA -U1
MSZ-GS18NA -U1 MSY-GS24NA -U1
MSZ-GS24NA -U1 MSY-GS30NA -U1
MSZ-GS30NA -U1 MSY-GS30NA2 -U1
MSZ-GS30NA2 -U1 MSY-GS36NA -U1
MSZ-GS36NA -U1 MSY-GS36NA2 -U1
MSZ-GS36NA2 -U1
SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES· ·····························2
2. PART NAMES AND FUNCTIONS ··················3
3. SPECIFICATION ········································7
4. OUTLINES AND DIMENSIONS ···················10
5. WIRING DIAGRAM···································12
6. REFRIGERANT SYSTEM DIAGRAM ···········15
7. SERVICE FUNCTIONS······························17
8. MICROPROCESSOR CONTROL·················20
9. TROUBLESHOOTING·······························34
10. DISASSEMBLY INSTRUCTIONS·················59
No. OBH874
REVISED EDITION-A
INDOOR UNIT
Outdoor unit service manual
MUZ-GS•NA/NAH, MUY-GS•NA Series (OBH875)
MXZ-C•NA, MXZ-C•NAHZ Series (OCH573)
PARTS CATALOG (OBB874)
OBH874 is void.
Revision A:
• MSZ-GS06/09/12/15/18/24NA - U1 ,
MSY-GS09/12/15/18/24NA - U1 ,
MSZ-GS30/36NA2 - U1 and
MSY-GS30/36NA2 - U1 have been added.
MSZ-GS18NA
MSY-GS18NA

2
TECHNICAL CHANGES1
MSZ-GS30NA - U1 MSY-GS30NA - U1
MSZ-GS36NA - U1 MSY-GS36NA - U1
1. New model
MSZ-GS06NA - U1
MSZ-GS09NA - U1 MSY-GS09NA - U1
MSZ-GS12NA - U1 MSY-GS12NA - U1
MSZ-GS15NA - U1 MSY-GS15NA - U1
MSZ-GS18NA - U1 MSY-GS18NA - U1
MSZ-GS24NA - U1 MSY-GS24NA - U1
1. New model
MSZ-GS30NA - U1 MSZ-GS30NA2 - U1
MSY-GS30NA - U1 MSY-GS30NA2 - U1
MSZ-GS36NA - U1 MSZ-GS36NA2 - U1
MSY-GS36NA - U1 MSY-GS36NA2 - U1
1. New model
Revision A:
• MSZ-GS06/09/12/15/18/24NA - U1 , MSY-GS09/12/15/18/24NA - U1 , MSZ-GS30/36NA2 - U1 and MSY-GS30/36NA2 - U1
have been added.
Use the specied refrigerant only
Never use any refrigerant other than that specified.
Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of.
Correct refrigerant is specified in the manuals and on the spec labels provided with our products.
We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by failure to
follow the instructions.
<Preparation before the repair service>
Prepare the proper tools.
Prepare the proper protectors.
Provide adequate ventilation.
After stopping the operation of the air conditioner, turn off the power-supply breaker and pull the power plug.
Discharge the capacitor before the work involving the electric parts.
<Precautions during the repair service>
Do not perform the work involving the electric parts with wet hands.
Do not pour water into the electric parts.
Do not touch the refrigerant.
Do not touch the hot or cold areas in the refrigeration cycle.
When the repair or the inspection of the circuit needs to be done without turning off the power, exercise great caution not to
touch the live parts.
WARNING
• When the refrigeration circuit has a leak, do not execute pump down with the compressor.
• When pumping down the refrigerant, stop the compressor before disconnecting the refrigerant pipes.
The compressor may burst if air etc. get into it.
• When opening or closing the valve below freezing temperatures, refrigerant may spurt out from the gap
between the valve stem and the valve body, resulting in injuries.
OBH874A

3
PART NAMES AND FUNCTIONS2
MSZ-GS06NA MSZ-GS09NA MSZ-GS12NA MSZ-GS15NA
MSY-GS09NA MSY-GS12NA MSY-GS15NA
ACCESSORIES
(1) Installation plate 1
(2) Attachment screws for the installation plate
4 × 25 mm 5
(3) Remote controller holder 1
(4) Screws for (3) 3.5 × 16 mm (Black) 2
(5) Battery (AAA) for (6) 2
(6) Wireless remote controller 1
(7) Felt tape (For left or left-rear piping) 1
(8) Air cleaning lter 2
Remote controller
Horizontal vane
Air filter
Air inlet
Heat exchanger
Front panel
Air cleaning filter
(
Anti-Allergy Enzyme Filter )
(Nano platinum filter )
Air outlet
Operation indicator lamp
Remote control receiving section
Emergency operation switch
Fan guard
OBH874A

4
MSZ-GS18NA
MSY-GS18NA
ACCESSORIES
(1) Installation plate 1
(2) Installation plate xing screw 4 × 25 mm 5
(3) Remote controller holder 1
(4) Fixing screw for (3) 3.5 × 16 mm (Black) 2
(5) Battery (AAA) for (6) 2
(6) Wireless remote controller 1
(7) Felt tape (Used for left or left-rear piping) 1
(8) Air cleaning lter 2
Fan guard
Remote controller
Operation indicator lamp
Emergency operation switch
Horizontal vane
Air outlet
Air filter
(Nano platinum filter )
Air inlet
Front panel
Air cleaning filter
(Anti-Allergy Enzyme
Filter)
Remote control receiving section
Heat exchanger
OBH874A

5
MSZ-GS24NA
MSY-GS24NA
ACCESSORIES
(1) Installation plate 1
(2) Installation plate xing screw 4 × 25 mm 7
(3) Remote controller holder 1
(4) Fixing screw for (3) 3.5 × 16 mm (Black) 2
(5) Battery (AAA) for (6) 2
(6) Wireless remote controller 1
(7) Felt tape (Used for left or left-rear piping) 1
(8) Air cleaning lter 2
Fan guard
Remote controller
Front panel
Air filter
(Nano platinum filter)
Air inlet
Air cleaning filter
(Electrostatic anti-allergy
enzyme filter)
Air outlet
Horizontal vane
Operation indicator lamp
Emergency operation switch
Heat exchanger
Remote control receiving section
OBH874A

6
ACCESSORIES
MSZ-GS30NA MSZ-GS36NA MSZ-GS30NA2 MSY-GS30NA2
MSY-GS30NA MSY-GS36NA MSZ-GS36NA2 MSY-GS36NA2
(1) Installation plate 1
(2) Attachment screws for the installation plate
4 × 25 mm 7
(3) Remote controller holder 1
(4) Screws for (3) 3.5 × 1.6 mm (Black) 2
(5) Battery (AAA) for (6) 2
(6) Wireless remote controller 1
(7) Felt tape (For left or left-rear piping) 2
(8) Air cleaning lter 2
Operation indicator
lamp
Remote control
receiving section
Emergency
switch
Horizontal vane
Air outlet
Air filter
(Nano platinum filter)
Air inlet
Air cleaning filter
(Anti-Allergy Enzyme Filter)
operation
Front panel
Remote controller
MSZ-GS30/36NA2
MSY-GS30/36NA2
MSZ-GS30/36NA
MSY-GS30/36NA
Fan guard
OBH874A

7
SPECIFICATION3
Indoor model MSZ-GS15NA
MSY-GS15NA MSZ-GS18NA MSY-GS18NA MSZ-GS24NA MSY-GS24NA
Power supply V, phase, Hz 208/230, 1, 60
Disconnect switch A 15
Min. circuit ampacity A 1.0
Fan motor F.L.A 0.75 0.74 0.73
Airow
Super High - High - Med. -
Low - Quiet (GS15/18)
Super High -
High - Med. - Low (GS24)
COOL Dry
(Wet) CFM
504 - 400 - 316 - 253 - 191
(454 - 360 - 285 - 228 - 172) 629 - 511 - 407 - 325 - 250 (566 - 460 - 367 - 292 - 225) 701 - 565 - 456 - 361 (631 - 509 - 410 - 325)
HEAT Dry
(MSZ)CFM
437 - 348 - 285 - 231 - 191 629 - 550 - 459 - 375 - 287 701 - 565 - 456 - 336
Moisture removal pt./h 2.5 3.8 5.1
Sound level
Super High - High - Med. -
Low - Quiet (GS15/18)
Super High -
High - Med. - Low (GS24)
Cooling dB(A) 49 - 44 - 38 - 32 - 26 49 - 44 - 38 - 33 - 28 53 - 47 - 41 - 34
Heating
(MSZ)dB(A) 46 - 40 - 35 - 30 - 26 48 - 43 - 39 - 34 - 28 52 - 47 - 41 - 32
Fan speed
Super High - High - Med. -
Low - Quiet (GS15/18)
Super High -
High - Med. - Low (GS24)
Cooling rpm
1,280 - 1,060 - 880 - 740 - 600 1,170 - 990 - 830 - 700 - 580 1,300 - 1,090 - 920 - 770
Heating
(MSZ)rpm
1,140 - 950 - 810 - 690 - 600 1,170 - 1,050 - 910 - 780 - 640 1,300 - 1,090 - 920 - 730
Cond. drain connection O.D. in. 5/8
Dimensions Win. 31-7/16 36-5/16 43-5/16 D 9-1/8 9-13/16 9-3/8
H 11-5/8 12 12-13/16
Weight Ib. 23 28 37
External nish Munsell 1.0Y 9.2/0.2
Remote controller Wireless type
Control voltage (by built-in transformer) 12 - 24 V DC
NOTE: Test conditions are based on AHRI 210/240.
Indoor model MSZ-GS06NA MSZ-GS09NA
MSY-GS09NA MSZ-GS12NA MSY-GS12NA
Power supply V, phase, Hz 208/230, 1, 60
Disconnect switch A 15
Min. circuit ampacity A 1.0
Fan motor F.L.A 0.75
Airow
Super High - High - Med. -
Low - Quiet
COOL Dry
(Wet) CFM 381 - 307 - 222 - 160 - 134 (343 - 276 - 200 - 144 - 121)
HEAT Dry CFM 390 - 307 - 222 - 160 - 134
Moisture removal pt./h – 0.4 2.5
Sound level
Super High - High - Med. -
Low - Quiet
Cooling dB(A) 43 - 37 - 30 - 22 - 19 45 - 37 - 30 - 22 - 19
Heating
(MSZ)dB(A) 43 - 37 - 30 - 22 - 19
Fan speed
Super High - High - Med. -
Low - Quiet
Cooling rpm 1,020 - 860 - 670 - 530 - 470
Heating
(MSZ)rpm 1,040 - 860 - 670 - 530 - 470
Cond. drain connection O.D. in. 5/8
Dimensions Win. 31-7/16 D 9-1/8
H 11-5/8
Weight Ib. 23
External nish Munsell 1.0Y 9.2/0.2
Remote controller Wireless type
Control voltage (by built-in transformer) 12 - 24 V DC
OBH874A

8
Model MSZ-GS30NA MSY-GS30NA MSZ-GS36NA MSY-GS36NA
Power supply V, phase, Hz 208/230 , 1 , 60
Disconnect switch A 15
Min. circuit ampacity A 1.0
Fan motor F.L.A 0.76
Airow
Super High - High
- Med. - Low
COOL Dry
(Wet) CFM 915 - 699 - 602 - 374 (823 - 629 - 542 - 336)
HEAT Dry 803 - 699 - 602 - 423
Moisture removal pt./h 7.8 9.3
Sound level
Super High - High
- Med. - Low
Cooling dB(A) 53 - 49 - 42 - 32
Heating
(MSZ)50 - 49 - 42 - 34 — 50 - 49 - 42 - 34 —
Cond. drain connection O.D. in. 5/8
Dimensions Win. 46-1/16 D 11-5/8
H 14-3/8
Weight Ib. 45
External nish Munsell 1.0Y 9.2/0.2
Remote controller Wireless type
Control voltage (by built-in transformer) 12-24 V DC
NOTE : Test conditions are based on AHRI 210/240.
Model MSZ-GS30NA2 MSY-GS30NA2 MSZ-GS36NA2 MSY-GS36NA2
Power supply V, phase, Hz 208/230 , 1 , 60
Disconnect switch A 15
Min. circuit ampacity A 1.0
Fan motor F.L.A 0.76
Airow
Super High - High
- Med. - Low
COOL Dry
(Wet) CFM 915 - 699 - 602 - 374 (823 - 629 - 542 - 336) 932-710-613-379 (839-639-552-341)
HEAT Dry 803 - 699 - 602 - 423 816-710-613-431
Moisture removal pt./h 7.8 9.3
Sound level
Super High - High
- Med. - Low
Cooling dB(A) 53 - 49 - 42 - 34
Heating
(MSZ)50 - 49 - 42 - 34 — 50 - 49 - 42 - 34 —
Cond. drain connection O.D. in. 5/8
Dimensions Win. 46-1/16 D 11-5/8
H 14-3/8
Weight Ib. 45
External nish Munsell 1.0Y 9.2/0.2
Remote controller Wireless type
Control voltage (by built-in transformer) 12-24 V DC
NOTE : Test conditions are based on AHRI 210/240.
OBH874A

9
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
Mode Condition Intake air temperature (°F)
DB WB
Cooling
Standard temperature 80 67
Maximum temperature 90 73
Minimum temperature 67 57
Maximum humidity 78%
Heating Standard temperature 70 60 Maximum temperature 80 67
Minimum temperature 70 60
3-2. OUTLET AIR SPEED AND COVERAGE RANGE
Model Mode Function Airow
(CFM) Air speed (ft./sec.) Coverage range (ft.)
MSZ-GS06NA
MSZ-GS09NA
MSY-GS09NA
MSZ-GS12NA
MSY-GS12NA
HEAT
(MSZ)Dry 390 19.8 28.4
COOL Dry 381 19.3 27.7
Wet 343 17.4 25.0
MSZ-GS15NA
MSY-GS15NA
HEAT
(MSZ)Dry 437 22.2 31.7
COOL Dry 504 25.6 36.4
Wet 454 23.0 32.9
MSZ-GS18NA
MSY-GS18NA
HEAT
(MSZ)Dry 629 28.7 42.8
COOL Dry 629 28.7 42.8
Wet 566 25.8 38.7
MSZ-GS24NA
MSY-GS24NA
HEAT
(MSZ)Dry 701 17.1 35.1
COOL Dry 701 17.1 35.1
Wet 631 15.4 31.7
MSZ-GS30NA
MSZ-GS36NA
MSY-GS30NA
MSY-GS36NA
HEAT
(MSZ)Dry 803 15.1 35.3
COOL Dry 915 17.2 40.0
Wet 823 15.4 36.1
MSZ-GS30NA2
MSZ-GS36NA2
MSY-GS30NA2
MSY-GS36NA2
HEAT
(MSZ)Dry 816 15.3 35.8
COOL Dry 932 17.5 40.8
Wet 839 15.7 36.8
● The air coverage range is the figure up
to the position where the air speed is 1
ft./sec., when air is blown out horizon-
tally from the unit properly at the High
speed position.
The coverage range should be used
only as a general guideline since it var-
ies according to the size of the room
and furniture arranged inside the room.
OBH874A

10
OUTLINES AND DIMENSIONS4
Unit: inch
MSZ-GS18NA
MSY-GS18NA
MSZ-GS06NA MSZ-GS09NA MSZ-GS12NA MSZ-GS15NA
MSY-GS09NA MSY-GS12NA MSY-GS15NA
Piping
Insulation ø1 - 9/16 O.D
Liquid line ø1/4 19 - 11/16 (Flared connection ø1/4)
Gas line ø3/8 16 - 15/16
(Flared connection: ø3/8 (GS06/09/12NA), ø1/2 (GS15NA))
Drain hose Insulation ø1-1/8 O.D Connected part ø5/8 O.D
Piping
Insulation ø2 O.D
Liquid line ø5/16 15-3/8 (Flared connection ø1/4)
Gas line ø15/32 13-3/8 (Flared connection ø1/2)
Drain hose Insulation ø1-5/32 Connected part ø5/8 O.D
2-1/4
2-1/2
9-13/16
3/16
35-13/16
36-5/16
1/4
27-15/16 6-5/16
2-1/16
12
2-9/16
2-13/16
2-1/2
2-9/16
3-11/16
2-1/16
9-7/16
10-5/16
1/8
8-7/8 8-7/8 3-11/16
8-3/4
10-3/8
2-5/16 15-7/8
8-11/16
3-11/16
7/8
1×7/16 Oblong hole
7/16×13/16
Oblong hole
Installation plate
Indoor unit
Wall hole Ø3
Air in
Installation plate
8-1/16
15-3/16
1-5/8
8-11/16
3
1-11/16
2-9/16
2-9/16
4-1/2
5-3/4
1/4
Air out
Piping
Drain hose
3-15/16
2-3/8 3/4
7-5/8
2-3/8 3/4
7-5/8
OBH874A