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

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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

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Outdoor unit model MUZ-HM12NA - U1
MUZ-HM12NA2 - U1
MUZ-HM12NA - U8
MUZ-HM12NA2 - U8
Capacity
Rated (Minimum~Maximum) Cooling 1 Btu/h 12,000 ( 3,800 ~ 12,200 )
Heating 47 1 Btu/h 12,200 ( 4,500 ~ 14,500 ) 12,200 ( 5,500 ~ 14,500 )
Capacity
Rated (Maximum) Heating 17 2 Btu/h 7,600 (9,000)
Power consumption
Rated (Minimum~Maximum) Cooling 1 W 1,210 (240 - 1,300) 1,210 (205 - 1,300)
Heating 47 1 W 990 (240 - 1,220) 990 (340 - 1,660)
Power consumption
Rated (Maximum) Heating 17 2 W 800 (990)
EER 1 [SEER] 3Cooling 9.9 [ 18.0 ]
HSPF IV 4Heating 10.0 [NA] / 8.5 [NA2]
COP Heating 13.61
Power factor Cooling (208/230) % 95/95 94/94
Heating (208/230) % 93/93 95/96
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 KNB092FQAHC
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) 49
Heating dB(A) 51
Airflow
High - Med. - Low Cooling CFM 1,063 1,102 - 639
Heating CFM 1,282 - 1,105 1,186 - 1,116 - 1,045
Fan speed
High - Med. - Low Cooling rpm 740 810 - 490
Heating rpm 890 - 770 870 - 820 - 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. 2 lb. 9 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

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Outdoor unit model MUZ-HM15NA
MUZ-HM15NA2 MUZ-HM18NA MUZ-HM18NA2
Capacity
Rated (Minimum~Maximum) Cooling 1 Btu/h 14,000 (3,100 - 16,000) 17,200 (5,800 - 18,000)
Heating 47 1 Btu/h 18,000 (4,800 - 18,500) 18,000 (5,400 - 20,900)
Capacity
Rated (Maximum) Heating 17 2 Btu/h 11,500 (14,000) 11,500 (15,000)
Power consumption
Rated (Minimum~Maximum) Cooling 1 W 1,127 (187 - 1,957) 1,598 (308 - 2,028)
Heating 47 1 W 1,570 (190 - 1,980) 1,548 (288 - 2,208)
Power consumption
Rated (Maximum) Heating 17 2 W 1,290 (1,820) 1,258 (1,908)
EER 1 [SEER] 3Cooling 12.0 [18.0] 10.5 [18.0]
HSPF IV 4Heating 10.0 [NA] / 8.5 [NA2] 10.0 [NA] / 8.5 [NA2]
COP Heating 13.30 3.32
Power factor Cooling (208/230) % 98/98 98/98
Heating (208/230) % 98/98 97/97
Power supply V , phase , Hz 208/230, 1 , 60 208/230, 1 , 60
Max. fuse size (time delay) A 15 15
Min. circuit ampacity A 10 10
Fan motor F.L.A A 0.50 0.50
Compressor
Model SNB130FQBMT SNB130FQBMT
R.L.A A 7.4 7.4
L.R.A A 9.3 9.3
Refrigeration oil
floz. (L) (Model) 11.8 (0.35) (FV50S) 11.8 (0.35) (FV50S)
Refrigerant control Linear expansion valve
Sound level 1Cooling dB(A) 49 49
Heating dB(A) 51 51
Airflow
High - Med. - Low Cooling CFM 1,102 - 639 1,102 - 639
Heating CFM 1,186 - 1,045 - 1,045 1,186 - 1,045 - 1,045
Fan speed
High - Med. - Low Cooling rpm 810 - 490 810 - 490
Heating rpm 870 - 770 - 770 870 - 770 - 770
Defrost method Reverse cycle
Dimensions W in. 31-1/2 31-1/2 D in. 11-1/4 11-1/4
H in. 21-5/8 21-5/8
Weight Ib. 81 81
External finish Munsell 3Y 7.8/1.1
Refrigerant piping Not supplied
Refrigerant pipe size
(Min. wall thickness) Liquid in. 1/4 (0.0315) 1/4 (0.0315)
Gas in. 1/2 (0.0315) 1/2 (0.0315)
Connection method Indoor Flared Flared
Outdoor Flared Flared
Between the indoor &
outdoor units Height difference ft. 40 40
Piping length ft. 65 65
Refrigerant charge (R410A) 2 lb. 9 oz. 2 lb. 10 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

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Outdoor unit model MUZ-HM24NA
MUZ-HM24NA2
Capacity
Rated (Minimum~Maximum) Cooling 1 Btu/h 22,500 (5,800 ~ 22,500)
Heating 47 1 Btu/h 26,000 (5,400 ~ 26,000)
Capacity
Rated (Maximum) Heating 17 2 Btu/h 18,500 (18,500)
Power consumption
Rated (Minimum~Maximum) Cooling 1 W 2,575 (275 ~ 2,575)
Heating 47 1 W 2,445 (265 ~ 2,445)
Power consumption
Rated (Maximum) Heating 17 2 W 2,245 (2,245)
EER 1 [SEER] 3 Cooling 8.6 [18.0]
HSPF IV 4 Heating 9.5 [NA] / 8.5 [NA2]
COP Heating
1 3.05
Power factor Cooling (208/230) % 99/99
Heating (208/230) % 99/99
Power supply V , phase , Hz 208/230, 1 , 60
Max. fuse size (time delay) A 15
Min. circuit ampacity A 14
Fan motor F.L.A 0.93
Compressor
Model SNB130FQBMT
R.L.A 10
L.R.A 12.5
Refrigeration oil
floz. (L) (Model) 11.8 (0.35) (FV50S)
Refrigerant control Linear expansion valve
Sound level 1Cooling dB(A) 54
Heating dB(A) 55
Airflow
High - Med. - Low COOL CFM 1,742 - 922
HEAT CFM 1,691 - 1,691 - 1,372
Fan speed
High - Med. - Low Cooling rpm 840 - 450
Heating rpm 810 - 810 - 650
Defrost method Reverse cycle
Dimensions W in. 33-1/16 D in. 13
H in. 34-5/8
Weight Ib. 121
External finish Munsell 3Y 7.8/1.1
Refrigerant piping Not supplied
Refrigerant pipe size
(Min. wall thickness) Liquid in. 3/8 (0.0315)
Gas in. 5/8 (0.0315)
Connection method Indoor Flared
Outdoor Flared
Between the indoor &
outdoor units Height difference ft. 50
Piping length ft. 100
Refrigerant charge (R410A) 3 lb. 9 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
OBH747C

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Test condition
ARI Mode Test Indoor air condition (°F) Outdoor air condition (°F)
Dry bulb Wet bulb Dry bulb Wet bulb
SEER
(Cooling)
"A-2" Cooling Steady State
at rated compressor Speed 80 67 95 (75)
"B-2" Cooling Steady State
at rated compressor Speed 80 67 82 (65)
"B-1" Cooling Steady State
at minimum compressor Speed 80 67 82 (65)
"F-1" Cooling Steady State
at minimum compressor Speed 80 67 67 (53.5)
"E-V" Cooling Steady State
at Intermediate compressor Speed 5 80 67 87 (69)
HSPF
(Heating)
"H1-2" Heating Steady State
at rated compressor Speed 70 60 47 43
"H3-2" Heating
at rated compressor Speed 70 60 17 15
"H0-1" Heating Steady State
at minimum compressor Speed 70 60 62 56.5
"H1-1" Heating Steady State
at minimum compressor Speed 70 60 47 43
"H2-V" Heating
at Intermediate compressor Speed 5 70 60 35 33
5: At Intermediate compressor Speed
= ("Rated compressor speed" - "minimum compressor speed") / 3 + "minimum compressor speed".
3, 4
(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 (NA), 5(NA2) -5 (NA), 4 (NA2)
OPERATING RANGE
(1) POWER SUPPLY
Rated voltage Guaranteed voltage (V)
Outdoor unit 208/230 V 1 phase
60 Hz
Min. 187 208 230 Max. 253
OBH747C

10
OUTLINES AND DIMENSIONS
4
Unit: inch
MUZ-HM09NA MUZ-HM09NA2 MUZ-HM12NA MUZ-HM12NA2
4 in. (100 mm)
or more
14 in. (350 mm)
or more
8 in. (200 mm)
or more *2
4 in. (100 mm)
or more
Liquid refrigerant pipe joint
Refrigerant pipe (flared) Ø 1/4
Gas refrigerant pipe joint
Refrigerant pipe (flared) Ø 3/8 (HM09/12)
Ø 1/2 (HM15/18)
REQUIRED SPACE
clear *1
*1 4 in. (100 mm) or more when
front and sides of the unit are clear
*2 When any 2 sides of left, right
and rear of the unit are clear
holes
MUZ-HM15NA MUZ-HM15NA2 MUZ-HM18NA MUZ-HM18NA2
OBH747C