Mitsubishi Electric MUZ-HE09NA User manual

SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES ··································· 2
2. PART NAMES AND FUNCTIONS····················· 3
3. SPECIFICATION················································ 4
4. OUTLINES AND DIMENSIONS ························ 7
5. WIRING DIAGRAM·········································· 10
6. REFRIGERANT SYSTEM DIAGRAM ············· 13
7. DATA································································ 16
8. ACTUATOR CONTROL··································· 30
9. SERVICE FUNCTIONS ··································· 31
10. TROUBLESHOOTING····································· 31
11. DISASSEMBLY INSTRUCTIONS···················· 52
Models
SPLIT-TYPE AIR CONDITIONERS
OUTDOOR UNIT
Indoor unit service manual
MSZ-HE•NA Series (OBH685)
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
HFC
utilized
R410A
No. OBH686
PARTS CATALOG (OBB686)
MUZ-HE09NA
MUZ-HE12NA
MUZ-HE15NA
MUZ-HE09NA
MUZ-HE12NA
MUZ-HE15NA
MUZ-HE18NA
MUZ-HE24NA

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.
MUZ-HE09NA
MUZ-HE12NA
MUZ-HE15NA
MUZ-HE18NA
MUZ-HE24NA
1. New model
1TECHNICAL CHANGES
OBH686

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MUZ-HE09NA MUZ-HE12NA MUZ-HE15NA
Air outlet
Drain outlet
Piping
Drain hose
Air inlet
(back and side)
MUZ-HE18NA
Air inlet
(back and side)
Piping
Air outlet
Drain hose
Drain outlet
2PART NAMES AND FUNCTIONS
MUZ-HE24NA
Piping
Air outlet
Drain outlet
Air inlet
(back and side)
Drain hose
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Outdoor unit model MUZ-HE09NA MUZ-HE12NA MUZ-HE15NA MUZ-HE18NA
Capacity
Rated (Minimum~Maximum)
Cooling 1 Btu/h 9,000
( 3,800 ~ 10,000 )
12,000
( 3,800 ~ 12,200 )
14,000
( 3,100 ~ 16,000 )
17,200
( 3,700 ~ 18,000 )
Heating 47 1 Btu/h 10,900
( 4,500 ~ 11,800 )
12,200
( 5,500 ~ 14,500 )
18,000
( 4,800 ~ 18,500 )
18,000
( 3,500 ~ 20,900 )
Power consumption
Rated
Cooling 1W 750 1,210 1,170 1,640
Heating 47 1W 900 990 1,600 1,590
EER 1[SEER] 2 Cooling 12.0 [ 18.0 ] 9.9 [ 18.0 ] 12.0 [ 18.0 ] 10.5 [ 18.0 ]
HSPF IV 3 Heating 8.5
COP Heating 1 3.55 3.61 3.30 3.32
Power supply V , phase , Hz 208/230 , 1 , 60
Max. fuse size (time delay) A 15
Min. circuit ampacity A 12 14
Fan motor F.L.A 0.50 0.93
Compressor
Model KNB073FQDHC KNB092FQAHC SNB130FQBHT
R.L.A 6.6 7.4 10.0
L.R.A 8.2 9.3 12.5
Refrigeration oil
(Model) L 0.32 (NEO22) 0.45 (NEO22)
Refrigerant control Linear expansion valve
Sound level 1Cooling dB(A) 46 49 54
Heating dB(A) 50 51 56
Defrost method Reverse cycle
Dimensions
W in. 31-1/2 33-1/16
D in. 11-1/4 13
H in. 21-5/8 33-7/16
Weight Ib. 66 77 80 119
External finish Munsell 3Y 7.8/1.1
Remote controller Wireless type
Control voltage
(by built-in transformer) VDC 12 - 24
Refrigerant piping Not supplied
Refrigerant pipe size
(Min. wall thickness)
Liquid in. 1/4 (0.0315)
Gas in. 3/8 (0.0315) 1/2 (0.0315)
Connection method Indoor Flared
Outdoor Flared
Between the indoor &
outdoor units
Height difference ft. 40 50
Piping length ft. 65 100
Refrigerant charge (R410A) 1 lb. 12 oz. 2 lb. 9 oz. 3 lb. 7 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
3SPECIFICATION
OBH686

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Outdoor unit model MUZ-HE24NA
Capacity
Rated (Minimum~Maximum)
Cooling 1 Btu/h 22,500
(8,200 ~ 22,500)
Heating 47 1 Btu/h 26,600
(7,500 ~ 30,000)
Power consumption
Rated
Cooling 1 W 2,620
Heating 47 1 W 2,150
EER 1[SEER] 2 Cooling 8.6 [18.0]
HSPF IV 3 Heating 8.5
COP Heating 1 3.62
Power supply V , phase , Hz 208/230 , 1 , 60
Max. fuse size (time delay) A 20
Min. circuit ampacity A 17.1
Fan motor F.L.A 0.93
Compressor
Model SNB172FQKMT
R.L.A 12.9
L.R.A 16.1
Refrigeration oil
(Model) L 0.40 (FV50S)
Refrigerant control Linear expansion valve
Sound level 1Cooling dB(A) 55
Heating dB(A) 55
Defrost method Reverse cycle
Dimensions
W in. 33-1/16
D in. 13
H in. 34-5/8
Weight Ib. 119
External finish Munsell 3Y 7.8/1.1
Remote controller Wireless type
Control voltage
(by built-in transformer) VDC 12-24
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) 4 lb. 3 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
OBH686

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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 4 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 4 70 60 35 33
4: At Intermediate compressor Speed
= ("Cooling rated compressor speed" - "minimum compressor speed") / 3 + "minimum compressor speed".
2, 3
(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)
Outdoor unit
208/230 V
1 phase
60 Hz
Min. 187 208 230 Max. 253
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Unit: inch
MUZ-HE09NA MUZ-HE12NA MUZ-HE15NA
Liquid pipe :1/4 (flared)
Gas pipe :3/8 (flared) (HE09/12)
1/2 (flared) (HE15)
6-23/32
2
5-7/8
2-23/32
1-3/4
15-3/4
12 ~ 12-3/4
13-9/16
11/16
1-9/16
7/8
21-5/8
11-1/32
13/32
31-1/2
19-11/16
5-15/16
11-29/32
17/3229/32 11-1/4
Air in
handle
Air in
Air out
2- 3/8 13/16 Oval hole
Drain hole
ø 1-5/8
REQUIRED SPACE
14 in. or more
8 in. or more *2
4 in. or more
4 in. or more
*1 4 in. 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
Clear *1
4OUTLINES AND DIMENSIONS
OBH686

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MUZ-HE18NA
20-9/32
14-3/16
Air in
11-25/32
2-19/32
Air in
Air out
19-11/16
33-1/16
13
2
4-25/32
33-7/16
16-15/16
3-3/16
4-3/8
× 13/16 slot
1-11/32
1-9/16
Drain 3 holes
ø1
-5/16
30°
35°
2-9/16
Liquid:1/4(flared)
Gas :1/2(flared)
3-9/16
8-11/32
4 in. or more
REQUIRED SPACE
14 in. or more
4 in. or more
*1 20 in. 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
Clear *1
20 in. or more *2
Unit: inch
OBH686

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16-7/16
1-9/16
1-5/8
Drain hole
6-7/8 19-11/16
13
2
Air in
Air out
2-holes 13/32 13/16
14-3/16
33-1/16
4-5/16
3-3/16
34-5/8
17-25/32
Service panel
3-29/32
6-1/2
7-11/16
35
44
Liquid refrigerant pipe joint
Refrigerant pipe (flared) Ø3/8
Gas refrigerant pipe joint
Refrigerant pipe (flared) Ø5/8
14 in. or more
4 in. or more
REQUIRED SPACE
4 in. or more
20 in. or more *2
*1 20 in. 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
Clear *1
Unit: inch
MUZ-HE24NA
OBH686

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MUZ-HE09NA MUZ-HE12NA
5WIRING DIAGRAM
MUZ-HE15NA
OBH686