Mitsubishi Electric MUZ-HM09NA-U1 User manual

Models
MUZ-HM09NA-U1 ,U8 MUZ-HM18NA-U1
MUZ-HM09NA2-U1 ,U8 MUZ-HM18NA2-U1
MUZ-HM12NA-U1 ,U8 MUZ-HM24NA-U1
MUZ-HM12NA2-U1 ,U8 MUZ-HM24NA2-U1
MUZ-HM15NA-U1
MUZ-HM15NA2-U1
HFC
utilized
R410A
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
MUZ-HM24NA PARTS CATALOG (OBB747)
INDOOR UNIT
SERVICE MANUAL
OUTDOOR UNIT No. OBH747
REVISED EDITION-C
OBH747 REVISED EDITION-B is void.
Revision C:
• MUZ-HM09/12NA-U1 , MUZ-HM09/12NA2-U1
have been added.
Indoor unit service manual
MSZ-HM•NA Series (OBH746)
CONTENTS
1. TECHNICAL CHANGES ··································· 3
2. PART NAMES AND FUNCTIONS····················· 4
3. SPECIFICATION················································ 5
4. OUTLINES AND DIMENSIONS ······················ 10
5. WIRING DIAGRAM·········································· 12
6. REFRIGERANT SYSTEM DIAGRAM············· 15
7. DATA································································ 19
8. ACTUATOR CONTROL··································· 32
9. SERVICE FUNCTIONS ··································· 33
10. TROUBLESHOOTING····································· 34
11. DISASSEMBLY INSTRUCTIONS···················· 59

2
Use the specified 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:
• MUZ-HM09/12NA- U8 , MUZ-HM09/12NA2- U8 , MUZ-HM15/18NA- U1 , MUZ-HM15/18NA2- U1 and MUZ-HM24NA2- U1 have
been added.
Revision B:
• 3. SPECIFICATION has been modified.
Revision C:
• MUZ-HM09/12NA-U1 , MUZ-HM09/12NA2-U1 have been added.
OBH747C

3
1TECHNICAL CHANGES
MUZ-HM24NA - U1
1. New model
MUZ-HM09NA - U8
MUZ-HM09NA2 - U8
MUZ-HM12NA - U8
MUZ-HM12NA2 - U8
MUZ-HM15NA - U1
MUZ-HM15NA2 - U1
MUZ-HM18NA - U1
MUZ-HM18NA2 - U1
MUZ-HM24NA2 - U1
1. New model
MUZ-HM09NA - U1
MUZ-HM09NA2 - U1
MUZ-HM12NA - U1
MUZ-HM12NA2 - U1
1. New model
OBH747C

4
MUZ-HM24NA MUZ-HM24NA2
Piping
Air outlet
Drain outlet
Air inlet
(back and side)
Drain hose
PART NAMES AND FUNCTIONS
2
MUZ-HM09NA MUZ-HM09NA2 MUZ-HM12NA MUZ-HM12NA2
MUZ-HM15NA MUZ-HM15NA2 MUZ-HM18NA MUZ-HM18NA2
Air outlet
Drain outlet
Piping
Drain hose
Air inlet
(back and side)
OBH747C

5
3SPECIFICATION
Outdoor unit model MUZ-HM09NA - U1
MUZ-HM09NA2 - U1
MUZ-HM09NA - U8
MUZ-HM09NA2 - U8
Capacity
Rated (Minimum~Maximum) Cooling 1 Btu/h 9,000 ( 3,800 ~ 10,000 )
Heating 47 1 Btu/h 10,900 ( 4,500 ~ 11,800 )
Capacity
Rated (Maximum) Heating 17 2 Btu/h 6,700 (7,200)
Power consumption
Rated (Minimum~Maximum) Cooling 1 W 750 (240 - 850) 750 (205 - 850)
Heating 47 1 W 900 (240 - 1,000) 900 (255 - 1,000)
Power consumption
Rated (Maximum) Heating 17 2 W 700 (780)
EER 1 [SEER] 3Cooling 12.0 [ 18.0 ]
HSPF IV 4Heating 10.0 [NA] / 8.5 [NA2]
COP Heating 13.55
Power factor Cooling (208/230) % 87/87 84/84
Heating (208/230) % 90/90 90/89
Power supply V , phase , Hz 208/230 , 1 , 60
Max. fuse size (time delay) A 15
Min. circuit ampacity A 9 12
Fan motor F.L.A A 0.50
Compressor
Model KNB073FRVMC KNB073FQDHC
R.L.A A 6.2 6.6
L.R.A A 7.7 8.2
Refrigeration oil
floz. (L) (Model) 9.1 (0.27) (FV50S) 10.8 (0.32) (NEO22)
Refrigerant control Linear expansion valve
Sound level 1Cooling dB(A) 46
Heating dB(A) 50
Airflow
High - Med. - Low Cooling CFM 1,063
Heating CFM 1,282 - 1,105 1,240 - 1,105
Fan speed
High - Med. - Low Cooling rpm 740
Heating rpm 890 - 770 860 - 770
Defrost method Reverse cycle
Dimensions W in. 31-1/2 D in. 11-1/4
H in. 21-5/8
Weight Ib. 73
External finish Munsell 3Y 7.8/1.1
Refrigerant piping Not supplied
Refrigerant pipe size
(Min. wall thickness) Liquid in. 1/4 (0.0315)
Gas in. 3/8 (0.0315)
Connection method Indoor Flared
Outdoor Flared
Between the indoor &
outdoor units Height difference ft. 40
Piping length ft. 65
Refrigerant charge (R410A) 1 lb. 12 oz.
NOTE: Test conditions are based on AHRI 210/240.
1: Rating conditions (Cooling) — Indoor: 80˚FDB, 67˚FWB, Outdoor: 95˚FDB, (75˚FWB)
(Heating) — Indoor: 70˚FDB, 60˚FWB, Outdoor: 47˚FDB, 43˚FWB
2: (Heating) — Indoor: 70˚FDB, 60˚FWB, Outdoor: 17˚FDB, 15˚FWB
3: Test condition (Refer to page 9.)
4: Test condition (Refer to page 9.)
OBH747C