Mitsubishi Electric MSZ-HM09NA-U1 User manual

Outdoor unit service manual
MUZ-HM•NA Series (OBH747)
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
PARTS CATALOG (OBB746)
MSZ-HM24NA
INDOOR UNIT
SERVICE MANUAL
INDOOR UNIT
Models
MSZ-HM09NA -U1
MSZ-HM12NA -U1
MSZ-HM15NA -U1
MSZ-HM18NA -U1
MSZ-HM24NA -U1
CONTENTS
1. TECHNICAL CHANGES······································· 2
2. PART NAMES AND FUNCTIONS·····················3
3. SPECIFICATION················································5
4. OUTLINES AND DIMENSIONS ························7
5. WIRING DIAGRAM············································ 8
6. REFRIGERANT SYSTEM DIAGRAM···············9
7. SERVICE FUNCTIONS ···································10
8. MICROPROCESSOR CONTROL ···················12
9. TROUBLESHOOTING·····································16
10. DISASSEMBLY INSTRUCTIONS···················· 30
No. OBH746
REVISED EDITION-B
Please void OBH746 REVISED EDITION-A.
Revision B:
• 3-1. OPERATING RANGE has been modified.

2
1TECHNICAL CHANGES
MSZ-HM24NA - U1
1. New model
MSZ-HM09NA - U1
MSZ-HM12NA - U1
MSZ-HM15NA - U1
MSZ-HM18NA - U1
1. New model
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.
Revision A:
• MSZ-HM09/12/15/18NA- U1 have been added.
Revision B:
• 3-1. OPERATING RANGE has been modified.
OBH746B

3
2PART NAMES AND FUNCTIONS
MSZ-HM09NA MSZ-HM12NA MSZ-HM15NA
Operation indicator lamp
Remote control receiving section
Emergency operation switch
Horizontal vane
Air outlet
Air ¿lter
Air inlet
Heat exchanger
Front panel
Air cleaning ¿lter
(Anti-Allergy Enzyme
Filter, option)
Display section Remote controller
ACCESSORIES
Installation plate 1
Attachment screws for the installation plate
4 × 25 mm 5
Battery (AAA) for remote controller 2
Wireless remote controller 1
Felt tape (For left or left-rear piping) 1
OBH746B

4
MSZ-HM18NA MSZ-HM24NA
ACCESSORIES
Installation plate 1
Attachment screws for the installation
plate 4 × 25 mm 5
Wireless remote controller 1
Felt tape (For left or left-rear piping) 1
Battery (AAA) for remote controller 2
Remote controller
Operation indicator lamp
Remote control receiving section
Emergency operation switch
Horizontal vane
Air outlet
Air ¿lter
Air inlet
Heat exchanger
Front panel
Air cleaning ¿lter
(Anti-Allergy Enzyme
Filter, option)
Display section
OBH746B

5
3SPECIFICATION
Indoor model MSZ-HM18NA MSZ-HM24NA
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 0.67
AirÀow
Super High - High - Med. -
Low
COOL Dry
(Wet)
CFM 625 - 530 - 431 - 328
(562 - 477 - 388 - 295) 702 - 530 - 431 - 353 (632 - 477 - 388 - 318)
HEAT Dry CFM 625 - 530 - 431 - 307 702 - 579 - 448 - 346
Moisture removal pt./h 2.1 2.3
Sound level
Super High - High - Med. -
Low
Cooling dB(A) 47 - 42 - 37 - 30 50 - 44 - 38 - 33
Heating dB(A) 47 - 42 - 37 - 30 50 - 44 - 38 - 32
Fan speed
Super High - High - Med. -
Low
Cooling rpm 1,140 - 1,000 - 850 - 690 1,250 - 1,000 - 850 - 730
Heating rpm 1,140 - 1,000 - 850 - 660 1,250 - 1,070 - 880 - 720
Cond. drain connection O.D. in. 5/8
Dimensions Win. 36-5/16 D9-13/16
H12
Weight Ib. 28
External ¿nish Munsell 1.0Y 9.2/0.2
Control voltage (by built-in transformer) 12 - 24 VDC
NOTE: Test conditions are based on AHRI 210/240.
Indoor model MSZ-HM09NA MSZ-HM12NA MSZ-HM15NA
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
AirÀow
Super High - High - Med. -
Low
COOL Dry
(Wet)
CFM 399 - 321 - 237 - 170
(364 - 286 - 201 - 134) 533 - 420 - 335 - 272 (498 - 385 - 300 - 237)
HEAT Dry CFM 406 - 321 - 237 - 170 463 - 367 - 304 - 247
Moisture removal pt./h 1.5 2.5 2.7
Sound level
Super High - High - Med. -
Low
Cooling dB(A) 43 - 37 - 30 - 22 45 - 37 - 30 - 22 49 - 44 - 38 - 32
Heating dB(A) 43 - 37 - 30 - 22 46 - 40 - 35 - 30
Fan speed
Super High - High - Med. -
Low
Cooling rpm 1,020 - 860 - 670 - 530 1,280 - 1,060 - 880 - 740
Heating rpm 1,040 - 860 - 670 - 530 1,140 - 950 - 810 - 690
Cond. drain connection O.D. in. 5/8
Dimensions Win. 31-7/16 D9-1/8
H11-5/8
Weight Ib. 22
External ¿nish Munsell 1.0Y 9.2/0.2
Control voltage (by built-in transformer) 12 - 24 VDC
NOTE: Test conditions are based on AHRI 210/240.
OBH746B