Mitsubishi Electric TRANE NTXSST A112AA Series User manual

CONTENTS
1. TECHNICAL CHANGES······································· 2
2. PART NAMES AND FUNCTIONS····················· 3
3. SPECIFICATION················································ 6
4. OUTLINES AND DIMENSIONS ························ 8
5. WIRING DIAGRAM·········································· 10
6. REFRIGERANT SYSTEM DIAGRAM ············· 12
7. SERVICE FUNCTIONS ··································· 13
8. MICROPROCESSOR CONTROL ··················· 15
9. TROUBLESHOOTING····································· 23
10. DISASSEMBLY INSTRUCTIONS···················· 41
Outdoor unit service manual
NTXSST•A112AA, NTYSST•A112AA Series (OBHT733)
NTXMMX•A•AA, NTXMPH•A•AA Series (OCHT573)
PARTS CATALOG (OBBT732)
NTXWST18A112AA
NTYWST18A112AA
INDOOR UNIT
SERVICE MANUAL
INDOOR UNIT
Models
NTXWST06A112AA
NTXWST09A112AA NTYWST09A112AA
NTXWST12A112AA NTYWST12A112AA
NTXWST15A112AA NTYWST15A112AA
NTXWST18A112AA NTYWST18A112AA
NTXWST24A112AA NTYWST24A112AA
No. OBHT732

2
1TECHNICAL CHANGES
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.
NTXWST06A112AA
NTXWST09A112AA
NTXWST12A112AA
NTXWST15A112AA
NTXWST18A112AA
NTXWST24A112AA
NTYWST09A112AA
NTYWST12A112AA
NTYWST15A112AA
NTYWST18A112AA
NTYWST24A112AA
1. New model
OBHT732

3
2PART NAMES AND FUNCTIONS
NTXWST06A112AA NTXWST09A112AA NTXWST12A112AA NTXWST15A112AA
NTYWST09A112AA NTYWST12A112AA NTYWST15A112AA
Remote controller
Operation indicator lamp
Remote control receiving section
Emergency operation switch
Horizontal vane
Air outlet
Air filter
Air inlet
Heat exchanger
Front panel
Air cleaning filter
(Anti-Allergy Enzyme
Filter)
(Nano platinum filter )
Display section
ACCESSORIES
Installation plate 1
Attachment screws for the installation plate
4 × 25 mm 5
Remote controller holder 1
Screws for 3.5 × 16 mm (Black) 2
Battery (AAA) for remote controller 2
Wireless remote controller 1
Felt tape (For left or left-rear piping) 1
Air cleaning lter 2
OBHT732

4
NTXWST18A112AA
NTYWST18A112AA
ACCESSORIES
Installation plate 1
Installation plate xing screw 4 × 25 mm 5
Remote controller holder 1
Fixing screw for 3.5 × 16 mm (Black) 2
Battery (AAA) for remote controller 2
Wireless remote controller 1
Felt tape (Used for left or left-rear piping) 1
Air cleaning lter 2
Remote controller
Operation indicator lamp
Remote control receiving section
Emergency operation switch
Horizontal vane
Air outlet
Air filter
Air inlet
Heat exchanger
Front panel
Air cleaning filter
(Anti-Allergy Enzyme
Filter)
(Nano platinum filter )
Display section
OBHT732

5
Remote controller
Display section
Front panel
Air filter
(Nano platinum filter)
Air inlet
Air cleaning filter
(Electrostatic anti-allergy
enzyme filter)
Air outlet
Horizontal vane
Heat exchanger
Operation indicator lamp
Remote control receiving section
Emergency operation switch
NTXWST24A112AA
NTYWST24A112AA
ACCESSORIES
Installation plate 1
Installation plate xing screw 4 × 25 mm 7
Remote controller holder 1
Fixing screw for 3.5 × 16 mm (Black) 2
Battery (AAA) for remote controller 2
Wireless remote controller 1
Felt tape (Used for left or left-rear piping) 1
Air cleaning lter 2
OBHT732

6
3SPECIFICATION
Indoor model NTXWST15A112AA
NTYWST15A112AA
NTXWST18A112AA
NTYWST18A112AA
NTXWST24A112AA
NTYWST24A112AA
Power supply V, phase, Hz 208/230, 1, 60
Max. fuse size (time delay)/ Disconnect switch A 15 20/15
Min. circuit ampacity A 1.0
Fan motor F.L.A 0.76 0.67 0.76
Airow
Super High - High - Med. -
Low - Quiet (15/18)
Powerful - Super High -
High - Med. - Low (24)
COOL Dry
(Wet) CFM
533 - 420 - 335 - 272 - 205
(498 - 385 - 300 - 237 - 170)
646 - 522 - 417 - 332 - 258
(581 - 470 - 375 - 299 - 232)
738 - 628 - 544 - 469 - 388
(661 - 562 - 487 - 420 - 347)
HEAT Dry
(NTXWST)CFM
463 - 367 - 304 - 247 - 205 646 - 565 - 469 - 385 - 297 738 - 628 - 544 - 469 - 388
Moisture removal pt./h 2.7 2.1 5.1
Sound level
Super High - High - Med. -
Low - Quiet (15/18)
Powerful - Super High -
High - Med. - Low (24)
Cooling dB(A) 49 - 44 - 38 - 32 - 26 49 - 44 - 38 - 33 - 28 53 - 49 - 45 - 41 - 34
Heating
(NTXWST)dB(A) 46 - 40 - 35 - 30 - 26 48 - 43 - 38 - 33 - 28 52 - 49 - 45 - 41 - 32
Fan speed
Super High - High - Med. -
Low - Quiet (15/18)
Powerful - Super High -
High - Med. - Low (24)
Cooling rpm
1,280 - 1,060 - 880 - 740 - 600 1,170 - 990 - 830 - 700 - 580 1,300 - 1,140 - 1,010 - 900 - 770
Heating
(NTXWST)rpm
1,140 - 950 - 810 - 690 - 600 1,170 - 1,050 - 910 - 780 - 640 1,300 - 1,140 - 1,010 - 900 - 730
Cond. drain connection O.D. in. 5/8
Dimensions
W
in.
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. 22 28 37
External nish Munsell 1.0Y 9.2/0.2
Control voltage (by built-in transformer) 12 - 24 V DC
NOTE: Test conditions are based on AHRI 210/240.
Indoor model NTXWST06A112AA NTXWST09A112AA
NTYWST09A112AA
NTXWST12A112AA
NTYWST12A112AA
Power supply V, phase, Hz 208/230, 1, 60
Max. fuse size (time delay)/ Disconnect switch A 15
Min. circuit ampacity A 1.0
Fan motor F.L.A 0.76
Airow
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 - 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
(NTXWST)dB(A) 43 - 37 - 30 - 22 - 19
Fan speed
Super High - High - Med. -
Low - Quiet
Cooling rpm 1,020 - 860 - 670 - 530 - 470
Heating
(NTXWST)rpm 1,040 - 860 - 670 - 530 - 470
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 nish Munsell 1.0Y 9.2/0.2
Control voltage (by built-in transformer) 12 - 24 V DC
OBHT732

7
(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
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 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.
Model Mode Function Airow
(CFM)
Air speed
(ft./s.)
Coverage
(ft.)
NTXWST06A112AA
HEAT Dry 406 20.6 29.5
COOL Dry 321 16.3 23.5
Wet 286 14.5 21.0
NTXWST09A112AA
NTYWST09A112AA
HEAT(NTX) Dry 406 20.6 29.5
COOL Dry 321 16.3 23.5
Wet 286 14.5 21.0
NTXWST12A112AA
NTYWST12A112AA
HEAT(NTX) Dry 406 20.6 29.5
COOL Dry 321 16.3 23.5
Wet 286 14.5 21.0
NTXWST15A112AA
NTYWST15A112AA
HEAT(NTX) Dry 463 23.4 33.5
COOL Dry 420 21.3 30.5
Wet 385 19.5 28.0
NTXWST18A112AA
NTYWST18A112AA
HEAT(NTX) Dry 646 29.5 44.0
COOL Dry 646 29.5 44.0
Wet 581 26.5 39.7
NTXWST24A112AA
NTYWST24A112AA
HEAT(NTX) Dry 738 18.0 36.9
COOL Dry 738 18.0 36.9
Wet 661 16.1 33.2
OBHT732

8
Unit: inch
NTXWST18A112AA
NTYWST18A112AA
4OUTLINES AND DIMENSIONS
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 Ø1-1/8 Connected part Ø5/8 O.D
3/4
6-1/4
2-5/16
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
NTXWST06A112AA NTXWST09A112AA NTXWST12A112AA NTXWST15A112AA
NTYWST09A112AA NTYWST12A112AA NTYWST15A112AA
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 (NTX(Y)WST06/09/12A112AA),
ø1/2 (NTX(Y)WST15A112AA))
Drain hose Insulation ø1-1/8 O.D Connected part ø5/8 O.D
OBHT732

9
NTXWST24A112AA
NTYWST24A112AA Unit: inch
OBHT732

10
NTXWST18A112AA
NTYWST18A112AA
5WIRING DIAGRAM
NTXWST06A112AA NTXWST09A112AA NTXWST12A112AA NTXWST15A112AA
NTYWST09A112AA NTYWST12A112AA NTYWST15A112AA
OBHT732