Mitsubishi Electric MSZ-A09NA Series User manual

SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES ··································· 3
2. PART NAMES AND FUNCTIONS····················· 4
3. SPECIFICATION················································ 5
4. OUTLINES AND DIMENSIONS ························ 7
5. WIRING DIAGRAM············································ 8
6. REFRIGERANT SYSTEM DIAGRAM··············· 9
7. SERVICE FUNCTIONS ··································· 10
8. TROUBLESHOOTING······································11
9. DISASSEMBLY INSTRUCTIONS···················· 25
10. PARTS LIST····················································· 30
10-1. PARTS LIST············································ 30
10-2. RoHS PARTS LIST································· 36
11. MICROPROCESSOR CONTROL···················· 42
No. OB450
REVISED EDITION-D
SPLIT-TYPE AIR CONDITIONERS
MSZ-A09/12/15/17NA
MSY-A15/17NA
INDOOR UNIT
Outdoor unit service manual
MUZ-A·NA, GA·NA Series (OB451)
MUY-A·NA, GA·NA Series (OB451)
MXZ-A·NA Series (OB444)
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
For servicing of RoHS compliant products, refer to the PARTS
LIST (RoHS compliant).
Revision D:
• MSZ-GA•NA and MSY-GA•NA have been added.
Please void OB450 REVISED EDITION-C.
Models
MSZ-A09NA, - 1
MSZ-A12NA, - 1
MSZ-A15NA, - 1
MSZ-A17NA, - 1
MSZ-A24NA, - 1
MSY-A15NA, - 1
MSY-A17NA, - 1
MSY-A24NA, - 1
MSZ-GA24NA
MSY-GA24NA

2
Revision A:
• PARTS LIST has been revised. (10-1.8, 10-2.8)
Revision B:
• MSZ-A•NA-1and MSY-A•NA-1
Remote controller has been changed.
Revision C:
• SPECIFICATION has been corrected.
Powerful has been added. (Airflow , Sound level)
Revision D:
• MSZ-GA•NA and MSY-GA•NA have been added.

3
1. Remote controller has been changed.
• Temperature indication function (°F/°C) has been added. (Refer to 11-10.)
• Timer indication has been changed. (AM/PM indication)
2. Conduit plate has been removed. (MSZ-A09/12/15/17, MSY-A15/17)
3. Conduit cover, terminal block cover and terminal block holder have been changed. (MSZ-A09/12/15/17, MSY-A15/17)
MSZ09UN ĺMSZ-A09NA
MSZ12UN ĺMSZ-A12NA
MSH15TN ĺMSZ-A15NA
MSH17TN ĺMSZ-A17NA
1. Control method between indoor and outdoor has been changed.
2. Indoor fan motor has been changed.
3. Signal of remote controller has been changed. (It is not available for conventional models.)
MSZ-A09NA ĺMSZ-A09NA-1
MSZ-A12NA ĺMSZ-A12NA-1
MSZ-A15NA ĺMSZ-A15NA-1
MSZ-A17NA ĺMSZ-A17NA-1
MSH24WN ĺMSZ-A24NA
MS15TN ĺMSY-A15NA
MS17TN ĺMSY-A17NA
MS24WN ĺMSY-A24NA
MSZ-A24NA ĺMSZ-A24NA-1
MSY-A15NA ĺMSY-A15NA-1
MSY-A17NA ĺMSY-A17NA-1
MSY-A24NA ĺMSY-A24NA-1
Models Remote controller Temperature indication
MSZ-A09/12/15/17NA KM06A °F
MSZ-A09/12/15/17NA- 1KM07J °F/°C
MSZ-A24NA KM06B °F
MSZ-A24NA - 1KM07K °F/°C
MSY-A15/17NA KM06C °F
MSY-A15/17NA - 1KM07L °F/°C
MSY-A24NA KM06D °F
MSY-A24NA - 1KM07M °F/°C
TECHNICAL CHANGES
1
MSZ-A24NA-1ĺMSZ-GA24NA
MSY-A24NA-1ĺMSY-GA24NA
1. Indoor electronic control P.C. board has been changed.

4
Line flow fan
Air outlet
Vertical vane
Air inlet
Display section
Front panel
Panel Heat exchanger
Horizontal vane
Operation section
(When the front panel is opened)
Remote controller
Remote control
receiving section
Catechin air filter
Air cleaning filter
(Anti-Allergy Enzyme
Filter, Blue bellows
type)
Emergency operation switch
Emergency operation switch
Operation indicator lamp
Remote control
receiving section
Operation Indicator
lamp
PART NAMES AND FUNCTIONS
2
MSZ-A09NA MSY-A15NA
MSZ-A12NA MSY-A17NA
MSZ-A15NA
MSZ-A17NA
MSZ-A24NA MSY-A24NA
MSZ-GA24NA MSY-GA24NA
MSZ-A09NA
MSZ-A12NA
MSZ-A15NA
MSZ-A17NA
MSY-A15NA
MSY-A17NA
MSZ-A24NA MSY-A24NA
MSZ-GA24NA MSY-GA24NA
ACCESSORIES
MSZ-A09/12/15/17NA
MSY-A15/17NA MSZ-A09/12/15/17NA- 1
MSY-A15/17NA- 1MSZ-A24NA MSY-A24NA
MSZ-GA24NA MSY-GA24NA
Installation plate 1 1 1
Installation plate ¿xing screw 4 × 25 mm 8 5 7
Remote controller holder 1 1 1
Fixing screw for 3.5 × 1.6 mm (Black) 2 2 2
Battery (AAA) for remote controller 2 2 2
Wireless remote controller 1 1 1
Felt tape (Used for left or left-rear piping) 1 1 1
Conduit plate 1 – –

5
3SPECIFICATION
Indoor unit model MSZ-A09NA MSZ-A12NA
External ¿nish White
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
AirÀow
Low–Med.–High–Powerful COOL Dry (Wet) CFM 152-229-307-338
(134-205-275-303) 152-240-353-388 (134-215-318-349)
HEAT 159-222-307-321 159-240-353-353
Moisture removal pt./h 2.3 3.2
Sound level
Low–Med.–High–Powerful COOL dB(A) 22-33-38-41 22-34-42-44
HEAT 22-33-38-39 22-34-42-42
Cond. drain connection O.D. in. 5/8
Dimensions Win. 30-11/16 D8-1/4
H11-3/4
Weight Ib. 23
Remote controller Wireless type
Control voltage (by built-in transformer) 12-24 VDC
Indoor unit model MSZ-A15NA MSY-A15NA MSZ-A17NA MSY-A17NA
External ¿nish White
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
AirÀow
Low–Med.–High–Powerful COOL Dry (Wet) CFM 268-328-381-419 (240-293-342-376)
HEAT 254-314-381-381 — 254-314-381-381 —
Moisture removal pt./h 4.7 5.2
Sound level
Low–Med.–High–Powerful COOL dB(A) 34-40-45-47 34-40-46-48
HEAT 34-38-44-44 — 34-38-44-44 —
Cond. drain connection O.D. in. 5/8
Dimensions Win. 30-11/16 D8-1/4
H11-3/4
Weight Ib. 23
Remote controller Wireless type
Control voltage (by built-in transformer) 12-24 VDC
Indoor unit model MSZ-A24NA MSZ-GA24NA MSY-A24NA MSY-GA24NA
External ¿nish White
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
AirÀow
Low–Med.–High–Powerful COOL Dry (Wet) CFM 296-431-568-624 (265-385-508-558)
HEAT 296-486-568-590 350-486-568-590 —
Moisture removal pt./h 7.3
Sound level
Low–Med.–High–Powerful COOL dB(A) 34-40-49-51
HEAT 34-40-48-49 —
Cond. drain connection O.D. in. 5/8
Dimensions Win. 43-5/16 D10-1/4
H12-13/16
Weight Ib. 37
Remote controller Wireless type
Control voltage (by built-in transformer) 12-24 VDC
NOTE: Test conditions are based on ARI 210/240.
Rating conditions (Cooling) — Indoor: 80ÛFDB, 67ÛFWB, Outdoor: 95ÛFDB, (75ÛFWB) Rated frequency
(Heating) — Indoor: 70ÛFDB, 60ÛFWB, Outdoor: 47ÛFDB, 43ÛFWB Rated frequency
(Heating) — Indoor: 70ÛFDB, 60ÛFWB, Outdoor: 17ÛFDB, 15ÛFWB Maximum frequency