Mitsubishi Electric MUZ-FS06NAH-U1 User manual

Models
MUZ-FS06NA -U1 MUZ-FS06NAH -U1
MUZ-FS09NA -U1 MUZ-FS09NAH -U1
MUZ-FS12NA -U1 MUZ-FS12NAH -U1
MUZ-FS15NA -U1 MUZ-FS15NAH -U1
MUZ-FS18NA -U1 MUZ-FS18NAH -U1
PARTS CATALOG (OBB873)
MUZ-FS06NA
MUZ-FS09NA
MUZ-FS12NA
MUZ-FS06NAH
MUZ-FS09NAH
MUZ-FS12NAH
CONTENTS
1. TECHNICAL CHANGES ······························2
2. PART NAMES AND FUNCTIONS··················3
3. SPECIFICATION ········································4
4. OUTLINES AND DIMENSIONS·····················6
5. WIRING DIAGRAM·····································8
6. REFRIGERANT SYSTEM DIAGRAM ··········· 10
7. DATA······················································ 12
8. ACTUATOR CONTROL ····························· 23
9. SERVICE FUNCTIONS······························ 24
10. TROUBLESHOOTING ······························· 25
11. DISASSEMBLY INSTRUCTIONS················· 46
HFC
utilized
R410A
OUTDOOR UNIT
SERVICE MANUAL
No. OBH873
REVISED EDITION-A
Indoor unit service manual
MSZ-FS•NA Series (OBH872)
OBH873 is void.
Revision A:
• A warning when opening or closing the
valve has been added.

2
1TECHNICAL CHANGES
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.
MUZ-FS06NA MUZ-FS06NAH
MUZ-FS09NA MUZ-FS09NAH
MUZ-FS12NA MUZ-FS12NAH
MUZ-FS15NA MUZ-FS15NAH
MUZ-FS18NA MUZ-FS18NAH
1. New model
Revision A:
• A warning when opening or closing the valve has been added.
<Preparation before the repair service>
Prepare the proper tools.
Prepare the proper protectors.
Provide adequate ventilation.
After stopping the operation of the air conditioner, turn off the power-supply breaker and pull the power plug.
Discharge the capacitor before the work involving the electric parts.
<Precautions during the repair service>
Do not perform the work involving the electric parts with wet hands.
Do not pour water into the electric parts.
Do not touch the refrigerant.
Do not touch the hot or cold areas in the refrigeration cycle.
When the repair or the inspection of the circuit needs to be done without turning off the power, exercise great caution not to
touch the live parts.
WARNING
• When the refrigeration circuit has a leak, do not execute pump down with the
compressor.
• When pumping down the refrigerant, stop the compressor before disconnecting the
refrigerant pipes. The compressor may burst if air etc. get into it.
• When opening or closing the valve below freezing temperatures, refrigerant may
spurt out from the gap between the valve stem and the valve body, resulting in injuries.
OBH873A

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MUZ-FS06NA MUZ-FS06NAH
MUZ-FS09NA MUZ-FS09NAH
MUZ-FS12NA MUZ-FS12NAH
MUZ-FS15NA MUZ-FS15NAH
MUZ-FS18NA MUZ-FS18NAH
PART NAMES AND FUNCTIONS
2
Air outlet
Drain outlet
Piping
Drain hose
Air inlet
(back and side)
Air outlet
Drain outlet
Piping
Drain hose
Air inlet
(back and side)
OBH873A

4
3SPECIFICATION
Outdoor unit model
MUZ-FS06NA
MUZ-FS06NAH
MUZ-FS09NA
MUZ-FS09NAH
MUZ-FS12NA
MUZ-FS12NAH
MUZ-FS15NA
MUZ-FS15NAH
MUZ-FS18NA
MUZ-FS18NAH
Capacity
Rated (Minimum~Maximum)
Cooling *1 Btu/h
6,000
(1,700 ~ 9,000)
9,000
(1,700 ~ 12,000)
12,000
(2,500 ~ 13,600)
14,000
(6,450 ~ 19,000)
17,200
(6,450 ~ 21,000)
Heating 47 *1 Btu/h
8,700
(1,600 ~ 14,000)
9,600
(1,600 ~ 18,000)
12,300
(3,700 ~ 21,000)
16,000
(5,150 ~ 24,000)
19,000
(5,150 ~ 30,000)
Capacity
Rated (Maximum) Heating 17 *2 Btu/h
5,400 (12,700) 5,900 (14,000) 7,600(17,300) 9,800 (22,700) 11,700 (27,000)
Power consumption
Rated (Minimum~Maximum)
Cooling *1 W
315
(100 ~ 560)
560
(100 ~ 1,000)
870
(170 ~ 1,150)
1,000
(410 ~ 2,000)
1,375
(410 ~ 2,220)
Heating 47 *1 W
545
(110 ~ 1,270)
620
(110 ~ 1,740)
850
(280 ~ 1,980)
1,155
(430 ~ 3,190)
1,610
(430 ~ 3,990)
Power consumption
Rated (Maximum) Heating 17 *2 W 390 (1,000) 450 (1,710) 610 (1,980) 830 (2,480) 1,160 (3,820)
EER *1 [SEER] *3 Cooling 19.1 [33.1] 16.1 [30.5] 13.8 [26.1] 14.0 [22.2] 12.0 [21.0]
HSPF IV *4 Heating NA: 13.5 NA: 13.5 NA: 12.5 NA: 12.5 NA: 12.5
NAH: 12.5 NAH: 12.5 NAH: 12.0 NAH: 12.0 NAH: 12.0
COP Heating *1 4.68 4.54 4.24 4.06 3.46
Power supply V , phase , Hz 208/230, 1 , 60
Max. fuse size (time delay) A 15 20
Min. circuit ampacity A 10 18
Fan motor F.L.A A 0.50 0.93
Compressor
Model
SNB092FQAMT SNB140FQUMT SNB172FQKMT
R.L.A A 7.4 13.6
L.R.A A 9.2 17.0
Refrigeration oil  oz. (Model) 0.35 (FV50S) 0.35 (FV50S) 0.40 (FV50S)
Refrigerant control Linear expansion valve
Sound level *1Cooling dB(A) 47 48 49 51 52
Heating dB(A) 49 49 51 55 55
Defrost method Reverse cycle
Dimensions
W in. 31-1/2 33-1/16
D in. 11-1/4 13
H in. 21-5/8 34-5/8
Weight Ib. NA: 82 NA: 83 NA: 117
NAH: 83 NAH: 84 NAH: 118
External nish Munsell 3Y 7.8/1.1
Remote controller Wireless type
Control voltage (by built-in transformer) V DC 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 meth-
od
Indoor Flared
Outdoor Flared
Between the indoor
& outdoor units
Height di󰀨erence ft. 40 50
Piping length ft. 65 100
Refrigerant charge (R410A) 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
*2: Rating conditions (Heating) — Indoor: 70˚FDB, 60˚FWB, Outdoor: 17˚FDB, 15˚FWB
OBH873A

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Test condition
AHRI
210/240
Mode Test Indoor air condition (°F) Outdoor air condition (°F)
Dry bulb Wet bulb Dry bulb Wet bulb
SEER
(Cooling)
"A-Full" Cooling Steady State
at rated compressor speed 80 67 95 (75)
"B-Full" Cooling Steady State
at rated compressor speed 80 67 82 (65)
"B-Low" Cooling Steady State
at minimum compressor speed 80 67 82 (65)
"F-Low" Cooling Steady State
at minimum compressor speed 80 67 67 (53.5)
"E-Int" Cooling Steady State
at intermediate compressor speed *5 80 67 87 (69)
HSPF
(Heating)
"H1-Nom" Heating Steady State
at rated compressor speed 70 60 47 43
"H3-Full" Heating
at rated compressor speed 70 60 17 15
"H0-Low" Heating Steady State
at minimum compressor speed 70 60 62 56.5
"H1-Low" Heating Steady State
at minimum compressor speed 70 60 47 43
"H2-Int" 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 -13 -14
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
OBH873A

6
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
2 x hole 3/8 x 13/16
(MUZ-FS06/09/12NA)
(MUZ-FS06/09/12NAH)
REQUIRED SPACE
Liquid refrigerant pipe joint
Refrigerant pipe (flared) Ø 1/4
Gas refrigerant pipe joint
Refrigerant pipe (flared) Ø 3/8
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
OUTLINES AND DIMENSIONS
4
Unit: inch
MUZ-FS06NA MUZ-FS06NAH MUZ-FS09NA MUZ-FS09NAH MUZ-FS12NA MUZ-FS12NAH
OBH873A

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MUZ-FS15NA MUZ-FS15NAH MUZ-FS18NA MUZ-FS18NAH
Unit: inch
13
2
16-7/16
1-9/16
13-3/4
14-5/8
15-3/8
11/16
OVAL HOLES 2×3/8× 13/16
→
AIR IN
↓
AIR IN
↓AIR OUT
BOLT PITCH FOR INSTALLATION
DRAIN HOLE ø1-21/32
13
34-5/8
17-25/32
5/16
6-7/8 19-11/16
33-1/16 3-3/16
HANDLE
3-29/32
6-1/2
43
35
7-11/16
19/32
GAS REFRIGERANT
PIPE JOINT
LIQUID
REFRIGERANT
PIPE JOINT
SERVICE PANEL
VALVE COVER
SERVICE PORT
4 in OR MORE.
BASICALLY OPEN 20 in OR MORE WITHOUT ANY OBSTRUCTION IN FRONT AND BOTH SIDES OF THE UNIT.
14 in OR MORE.
20 in OR MORE.
OPEN TWO SIDES OF RIGHT
OR REAR SIDE.
4 in OR MORE.
FLARED ø12.7 (1/2”)
FLARED ø6.35 (1/4”)
REQUIRED SPACE
OBH873A

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5WIRING DIAGRAM
MUZ-FS06NA MUZ-FS09NA MUZ-FS12NA
MUZ-FS06NAH MUZ-FS09NAH MUZ-FS12NAH
OBH873A

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MUZ-FS15NA MUZ-FS18NA
MUZ-FS15NAH MUZ-FS18NAH
OBH873A

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6REFRIGERANT SYSTEM DIAGRAM
Unit: inch
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
(with strainer)
Stop valve
Refrigerant flow in cooling
Compressor
4-way valve
Refrigerant flow in heating
Refrigerant pipe ø3/8
(with heat insulator)
Refrigerant pipe ø1/4
(with heat insulator)
R.V. coil
heating ON
cooling OFF
Strainer
#100
LEV
Ambient
temperature
thermistor
RT65
Muffler
Capillary tube
O.D. 0.157 ×
I.D. 0.094 × 9-7/16
(
ø4.0 × ø2.4 × 240 )
Outdoor heat
exchanger
temperature
thermistor
RT68
Capillary tube
O.D. 0.118 ×
I.D. 0.079 × 8-9/32
(ø3.0 × ø2.0 × 210)
Service port
(high pressure)
Service port
(low pressure)
Muffler
MUZ-FS06NA MUZ-FS06NAH MUZ-FS09NA MUZ-FS09NAH MUZ-FS12NA MUZ-FS12NAH
MUZ-FS15NA MUZ-FS15NAH MUZ-FS18NA MUZ-FS18NAH
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
Stop valve
Capillary tube
O.D. 0.157 ×
I.D. 0.094× 3-15/16
(ø4.0×ø2.4×100)
Refrigerant flow in cooling
Compressor
4-way valve
Refrigerant flow in heating
Refrigerant pipe
ø 1/2
(with heat insulator)
Refrigerant pipe ø 1/4
(with heat insulator)
LEV
Muffler R.V. coil
heating ON
cooling OFF
Muffler,
#100 strainer
Strainer
#100
Outdoor heat
exchanger
temperature
thermistor
RT68
Ambient
temperature
thermistor
RT65
Strainer
#100
Service port
(low pressure)
Muffler
ACC
Service port
(high pressure)
Capillary tube
O.D. 0.118 ×
I.D. 0.079 × 9-7/16
(ø3.0 × ø2.0 × 240)
OBH873A

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Max. Length
A
Max. Height
difference
B
Indoor
unit
Outdoor unit
MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE
Model
Refrigerant piping: ft. Piping size O.D: in.
Max. Length
A
Max. Height di󰀨erence
B Gas Liquid
MUZ-FS06NA
MUZ-FS06NAH
MUZ-FS09NA
MUZ-FS09NAH
MUZ-FS12NA
MUZ-FS12NAH
65 40 3/8 1/4
MUZ-FS15NA
MUZ-FS15NAH
MUZ-FS18NA
MUZ-FS18NAH
100 50 1/2 1/4
ADDITIONAL REFRIGERANT CHARGE (R410A: oz.)
NOTE: Refrigerant piping exceeding 25 ft. requires additional refrigerant charge according to the calculation.
Model Outdoor unit
precharged
Refrigerant piping length (one way): ft.
25 30 40 50 60 65
MUZ-FS06NA
MUZ-FS06NAH
MUZ-FS09NA
MUZ-FS09NAH
MUZ-FS12NA
MUZ-FS12NAH
2 lb. 9 oz. 0 1.08 3.24 5.40 7.56 8.64
Calculation: X oz. = 1.08/5 oz./ft. × (Refrigerant piping length (ft.) - 25)
NOTE: Refrigerant piping exceeding 25 ft. requires additional refrigerant charge according to the calculation.
Model Outdoor unit
precharged
Refrigerant piping length (one way): ft.
25 30 40 50 60 70 80 90 100
MUZ-FS15NA
MUZ-FS15NAH
MUZ-FS18NA
MUZ-FS18NAH
3 lb. 7 oz. 0 1.08 3.24 5.40 7.56 9.72 11.88 14.04 16.20
Calculation: X oz. = 1.08/5 oz./ft. × (Refrigerant piping length (ft.) - 25)
OBH873A

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MUZ-FS06NA MUZ-FS06NAH MUZ-FS09NA MUZ-FS09NAH MUZ-FS12NA MUZ-FS12NAH
MUZ-FS15NA MUZ-FS15NAH MUZ-FS18NA MUZ-FS18NAH
7-1. PERFORMANCE DATA
1) COOLING CAPACITY
Model
Indoor air Outdoor intake air DB temperature (˚F)
IWB (˚F) 75 85 95
TC SHC SHF TPC TC SHC SHF TPC TC SHC SHF TPC
MUZ-FS06NA
MUZ-FS06NAH
71 7.4 6.1 0.83 0.28 6.9 5.7 0.83 0.31 6.5 5.3 0.83 0.33
67 7.0 6.7 0.96 0.26 6.5 6.2 0.96 0.29 6.0 5.8 0.96 0.32
63 6.5 7.2 1.09 0.25 6.1 6.6 1.09 0.28 5.6 6.2 1.09 0.30
MUZ-FS09NA
MUZ-FS09NAH
71 11.0 8.7 0.79 0.50 10.3 8.1 0.79 0.55 9.7 7.6 0.79 0.59
67 10.4 9.6 0.92 0.47 9.7 8.9 0.92 0.52 9.0 8.3 0.92 0.56
63 9.8 10.3 1.05 0.45 9.1 9.6 1.05 0.50 8.5 8.9 1.05 0.53
MUZ-FS12NA
MUZ-FS12NAH
71 14.7 10.2 0.70 0.77 13.7 9.6 0.70 0.85 12.9 9.0 0.70 0.91
67 13.9 11.6 0.83 0.73 13.0 10.8 0.83 0.80 12.0 10.0 0.83 0.87
63 13.1 12.6 0.96 0.70 12.1 11.7 0.96 0.77 11.3 10.9 0.96 0.83
MUZ-FS15NA
MUZ-FS15NAH
71 17.2 9.7 0.57 0.89 16.0 9.1 0.57 0.98 15.1 8.5 0.57 1.05
67 16.2 11.4 0.70 0.84 15.1 10.6 0.70 0.93 14.0 9.8 0.70 1.00
63 15.3 12.7 0.83 0.80 14.1 11.8 0.83 0.89 13.2 11.0 0.83 0.96
MUZ-FS18NA
MUZ-FS18NAH
71 21.1 11.3 0.54 1.22 19.7 10.6 0.54 1.34 18.5 9.9 0.54 1.44
67 20.0 13.4 0.67 1.16 18.6 12.4 0.67 1.27 17.2 11.5 0.67 1.38
63 18.7 15.1 0.80 1.10 17.4 14.0 0.80 1.22 16.2 13.0 0.80 1.31
Model
Indoor air Outdoor intake air DB temperature (˚F)
IWB (˚F) 105 115
TC SHC SHF TPC TC SHC SHF TPC
MUZ-FS06NA
MUZ-FS06NAH
71 6.0 5.0 0.83 0.35 5.5 4.6 0.83 0.36
67 5.6 5.4 0.96 0.33 5.1 4.9 0.96 0.35
63 5.1 5.6 1.09 0.32 4.7 5.1 1.09 0.33
MUZ-FS09NA
MUZ-FS09NAH
71 9.0 7.1 0.79 0.62 8.3 6.5 0.79 0.64
67 8.4 7.7 0.92 0.59 7.7 7.1 0.92 0.62
63 7.7 8.1 1.05 0.57 7.0 7.4 1.05 0.59
MUZ-FS12NA
MUZ-FS12NAH
71 12.0 8.4 0.70 0.96 11.0 7.7 0.70 1.00
67 11.2 9.3 0.83 0.92 10.3 8.5 0.83 0.97
63 10.3 9.9 0.96 0.89 9.4 9.0 0.96 0.92
MUZ-FS15NA
MUZ-FS15NAH
71 14.0 7.9 0.57 1.11 12.9 7.3 0.57 1.15
67 13.0 9.1 0.70 1.06 12.0 8.4 0.70 1.11
63 12.0 10.0 0.83 1.02 10.9 9.1 0.83 1.06
MUZ-FS18NA
MUZ-FS18NAH
71 17.2 9.2 0.54 1.52 15.8 8.5 0.54 1.58
67 16.0 10.7 0.67 1.46 14.7 9.9 0.67 1.53
63 14.7 11.8 0.80 1.40 13.4 10.8 0.80 1.46
NOTE:1. IWB : Intake air wet-bulb temperature TC : Total Capacity (x103Btu/h)
SHC : Sensible Heat Capacity (x103Btu/h) SHF : Sensible Heat Factor
TPC : Total Power Consumption (kW)
2. SHC is based on 80˚F of indoor Intake air DB temperature.
DATA7
OBH873A

13
2) COOLING CAPACITY CORRECTIONS
Refrigerant piping length (one way: ft.)
25 (std.) 40 65 100
MUZ-FS06NA
MUZ-FS06NAH
MUZ-FS09NA
MUZ-FS09NAH
MUZ-FS12NA
MUZ-FS12NAH
1.0 0.988 0.967 -
MUZ-FS15NA
MUZ-FS15NAH
MUZ-FS18NA
MUZ-FS18NAH
1.0 0.985 0.963 0.933
3) HEATING CAPACITY CORRECTIONS
Refrigerant piping length (one way: ft.)
25 (std.) 40 65 100
MUZ-FS06NA
MUZ-FS06NAH
MUZ-FS09NA
MUZ-FS09NAH
MUZ-FS12NA
MUZ-FS12NAH
1.0 0.997 0.993 -
MUZ-FS15NA
MUZ-FS15NAH
MUZ-FS18NA
MUZ-FS18NAH
1.0 0.997 0.993 0.987
OBH873A

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4) HEATING CAPACITY
Model
Indoor air Outdoor intake air WB temperature (˚F)
IDB (˚F) 5 15 25 35 43 45 55
TC TPC TC TPC TC TPC TC TPC TC TPC TC TPC TC TPC
MUZ-FS06NA
75 3.8 0.32 5.0 0.41 6.3 0.48 7.5 0.53 8.5 0.56 8.7 0.57 9.9 0.59
70 4.1 0.31 5.4 0.39 6.5 0.47 7.7 0.52 8.7 0.55 9.0 0.56 10.1 0.58
65 4.4 0.29 5.5 0.38 6.8 0.45 8.0 0.50 9.0 0.53 9.2 0.54 10.4 0.57
MUZ-FS06NAH
75 3.8 0.45 5.0 0.54 6.3 0.61 7.5 0.53 8.5 0.56 8.7 0.57 9.9 0.59
70 4.1 0.44 5.4 0.52 6.5 0.60 7.7 0.52 8.7 0.55 9.0 0.56 10.1 0.58
65 4.4 0.42 5.5 0.51 6.8 0.58 8.0 0.50 9.0 0.53 9.2 0.54 10.4 0.57
MUZ-FS09NA
75 4.2 0.37 5.6 0.46 7.0 0.54 8.3 0.60 9.4 0.64 9.6 0.64 10.9 0.67
70 4.6 0.35 5.9 0.45 7.2 0.53 8.5 0.59 9.6 0.62 9.9 0.63 11.2 0.66
65 4.8 0.33 6.0 0.43 7.5 0.51 8.8 0.57 9.9 0.60 10.2 0.61 11.4 0.64
MUZ-FS09NAH
75 4.2 0.50 5.6 0.59 7.0 0.67 8.3 0.60 9.4 0.64 9.6 0.64 10.9 0.67
70 4.6 0.48 5.9 0.58 7.2 0.66 8.5 0.59 9.6 0.62 9.9 0.63 11.2 0.66
65 4.8 0.46 6.0 0.56 7.5 0.64 8.8 0.57 9.9 0.60 10.2 0.61 11.4 0.64
MUZ-FS12NA
75 5.4 0.50 7.1 0.63 8.9 0.74 10.6 0.83 12.0 0.87 12.4 0.88 14.0 0.92
70 5.8 0.48 7.6 0.61 9.2 0.73 10.9 0.81 12.3 0.85 12.7 0.87 14.3 0.90
65 6.2 0.46 7.7 0.59 9.7 0.70 11.3 0.79 12.7 0.83 13.0 0.84 14.6 0.88
MUZ-FS12NAH
75 5.4 0.63 7.1 0.76 8.9 0.87 10.6 0.83 12.0 0.87 12.4 0.88 14.0 0.92
70 5.8 0.61 7.6 0.74 9.2 0.86 10.9 0.81 12.3 0.85 12.7 0.87 14.3 0.90
65 6.2 0.59 7.7 0.72 9.7 0.83 11.3 0.79 12.7 0.83 13.0 0.84 14.6 0.88
MUZ-FS15NA
75 7.0 0.68 9.3 0.86 11.6 1.01 13.8 1.13 15.6 1.18 16.1 1.20 18.2 1.25
70 7.6 0.65 9.8 0.83 12.0 0.99 14.2 1.10 16.0 1.16 16.5 1.18 18.6 1.22
65 8.0 0.62 10.1 0.80 12.6 0.95 14.6 1.07 16.5 1.13 17.0 1.14 19.0 1.20
MUZ-FS15NAH
75 7.0 0.80 9.3 0.98 11.6 1.13 13.8 1.13 15.6 1.18 16.1 1.20 18.2 1.25
70 7.6 0.77 9.8 0.95 12.0 1.11 14.2 1.10 16.0 1.16 16.5 1.18 18.6 1.22
65 8.0 0.74 10.1 0.92 12.6 1.07 14.6 1.07 16.5 1.13 17.0 1.14 19.0 1.20
MUZ-FS18NA
75 8.4 0.95 11.0 1.20 13.8 1.41 16.4 1.57 18.5 1.65 19.1 1.67 21.7 1.74
70 9.0 0.91 11.7 1.16 14.3 1.38 16.8 1.53 19.0 1.61 19.6 1.64 22.1 1.71
65 9.5 0.87 12.0 1.11 14.9 1.33 17.4 1.49 19.6 1.57 20.1 1.59 22.6 1.67
MUZ-FS18NAH
75 8.4 1.07 11.0 1.32 13.8 1.53 16.4 1.57 18.5 1.65 19.1 1.67 21.7 1.74
70 9.0 1.03 11.7 1.28 14.3 1.50 16.8 1.53 19.0 1.61 19.6 1.64 22.1 1.71
65 9.5 0.99 12.0 1.23 14.9 1.45 17.4 1.49 19.6 1.57 20.1 1.59 22.6 1.67
NOTE: 1. IDB : Intake air dry-bulb temperature
TC : Total Capacity (x103Btu/h) TPC : Total Power Consumption (kW)
2. Above data is for heating operation without any frost.
OBH873A

15
7-2. PERFORMANCE CURVE
Cooling
This value of frequency is not the same as the actual frequency in operating. Refer to 7-5 and 7-6 for the relationships
between frequency and capacity.
71
67
63
65 75 85 95 105 115
0.6
0.7
0.8
0.9
1.0
1.1
Indoor intake air WB temperature (°F)
SHF at rating condition = 0.83
= 437 CFM
Airflow
Outdoor intake air DB temperature (°F)
Total power consumption
(kW)
MUZ-FS06NA MUZ-FS06NAH
MUZ-FS12NA MUZ-FS12NAH MUZ-FS15NA MUZ-FS15NAH
Cooling capacity ( at Rated frequency)
0.9
1.0
1.1
1.2
1.3
1.4
1.5
14 23 32 41 50 59 68 77 86 95 104 113
Outdoor intake air DB temperature(°F)
Capacity correction factors
76
75
68
64
72
Indoor intake air Wet-bulb
temperature( F)
Indoor air Wet-bulb temperature
difference (°F)
71
67
63
65 75 85 95 105 115
0.7
0.8
0.9
1.0
1.1
1.2
Indoor intake air WB temperature (°F)
SHF at rating condition = 0.7
= 437 CFM
Airflow
Outdoor intake air DB temperature (°F)
Total power consumption
(kW)
MUZ-FS18NA MUZ-FS18NAH
71
67
63
65 75 85 95 105 115
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
Indoor intake air WB temperature (°F)
SHF at rating condition = 0.67
= 437 CFM
Airflow
Outdoor intake air DB temperature (°F)
Total power consumption
(kW)
71
67
63
65 75 85 95 105 115
0.3
0.4
0.5
0.6
0.7
Indoor intake air WB temperature (°F)
SHF at rating condition = 0.92
= 381 CFM
Airflow
Outdoor intake air DB temperature (°F)
Total power consumption
(kW)
71
67
63
65 75 85 95 105 115
0.1
0.2
0.3
0.4
0.5
Indoor intake air WB temperature (°F)
SHF at rating condition = 0.96
= 381 CFM
Airflow
Outdoor intake air DB temperature (°F)
Total power consumption
(kW)
MUZ-FS09NA MUZ-FS09NAH
OBH873A

16
65
70
75
-5 5 15 25 35 45 55 65
0.2
0.3
0.4
0.5
0.6
0.7
Indoor intake air DB temperature (°F)
= 437 CFM
Airflow
Outdoor intake air WB temperature (°F)
Total power consumption
(kW)
65
70
75
-5 5 15 25 35 45 55 65
0.2
0.3
0.4
0.5
0.6
0.7
Indoor intake air DB temperature (°F)
= 437 CFM
Airflow
Outdoor intake air WB temperature (°F)
Total power consumption
(kW)
65
70
75
-5 5 15 25 35 45 55 65
0.2
0.4
0.6
0.8
1.0
Indoor intake air DB temperature (°F)
= 454 CFM
Airflow
Outdoor intake air WB temperature (°F)
Total power consumption
(kW)
Heating
MUZ-FS15NA
Indoor air Dry-bulb temperature
difference (°F)
Outdoor intake air WB temperature (°F)
-4 5 14 23 32 41 50 59
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
Heating capacity
( at Rated frequency)
Capacity correction factor
59
68
79
Indoor intake air Dry-bulb temperature ( F)
65
70
75
-5 5 15 25 35 45 55 65
0.2
0.4
0.6
0.8
1.0
1.2
1.4
Indoor intake air DB temperature (°F)
= 514 CFM
Airflow
Outdoor intake air WB temperature (°F)
Total power consumption
(kW)
MUZ-FS09NA
MUZ-FS12NA
65
70
75
-5 5 15 25 35 45 55 65
0.3
0.4
0.5
0.6
0.7
0.8
Indoor intake air DB temperature (°F)
= 437 CFM
Airflow
Outdoor intake air WB temperature (°F)
Total power consumption
(kW)
65
70
75
-5 5 15 25 35 45 55 65
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
Indoor intake air DB temperature (°F)
= 437 CFM
Airflow
Outdoor intake air WB temperature (°F)
Total power consumption
(kW)
65
70
75
-5 5 15 25 35 45 55 65
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
Indoor intake air DB temperature (°F)
= 454 CFM
Airflow
Outdoor intake air WB temperature (°F)
Total power consumption
(kW)
MUZ-FS09NAH
MUZ-FS12NAH
MUZ-FS15NAH
65
70
75
-5 5 15 25 35 45 55 65
0.2
0.4
0.6
0.8
1.0
1.2
1.4
Indoor intake air DB temperature (°F)
= 514 CFM
Airflow
Outdoor intake air WB temperature (°F)
Total power consumption
(kW)
MUZ-FS06NA MUZ-FS06NAH
OBH873A

17
MUZ-FS18NA
This value of frequency is not the same as the actual frequency in operating. Refer to 7-5 and 7-6 for the relationships
between frequency and capacity.
65
70
75
-5 5 15 25 35 45 55 65
0.50
0.75
1.00
1.25
1.50
1.75
2.00
Indoor intake air DB temperature (°F)
= 514 CFM
Airflow
Outdoor intake air WB temperature (°F)
Total power consumption
(kW)
MUZ-FS18NAH
65
70
75
-5 5 15 25 35 45 55 65
0.2
0.7
1.2
1.7
2.2
Indoor intake air DB temperature (°F)
= 514 CFM
Airflow
Outdoor intake air WB temperature (°F)
Total power consumption
(kW)
7-3. CONDENSING PRESSURE
Cooling
Data are based on the condition of indoor humidity 50 %.
Air flow should be set to High speed.
MUZ-FS06NA MUZ-FS06NAH
65 70 75 80 85 90 95 100 105 110 115
200
250
300
350
400
450
500
(°F) (°F)
65 70 75 80 85 90 95 100 105 110 115
80
100
120
140
160
180
200
(PSIG)
Condensing pressure
Suction pressure
Outdoor ambient temperature
Indoor DB temperature (°F)
(PSIG)
Indoor DB temperature (°F)
Outdoor ambient temperature
86
80
75
70
86
80
75
70
65 70 75 80 85 90 95 100 105 110 115
200
250
300
350
400
450
500
(°F) (°F)
65 70 75 80 85 90 95 100 105 110 115
100
120
140
160
180
200
220
240
(PSIG)
Condensing pressure
Suction pressure
Outdoor ambient temperature
Indoor DB temperature (°F)
(PSIG)
Indoor DB temperature (°F)
Outdoor ambient temperature
86
80
75
70 86
80
75
70
MUZ-FS09NA MUZ-FS09NAH
MUZ-FS12NA MUZ-FS12NAH
65 70 75 80 85 90 95 100 105 110 115
200
250
300
350
400
450
500
(°F) (°F)
65 70 75 80 85 90 95 100 105 110 115
80
100
120
140
160
180
(PSIG)
Condensing pressure
Suction pressure
Outdoor ambient temperature
Indoor DB temperature (°F)
(PSIG)
Indoor DB temperature (°F)
Outdoor ambient temperature
86
80
75
70
86
80
75
70
OBH873A

18
MUZ-FS18NA MUZ-FS18NAH
65 70 75 80 85 90 95 100 105 110 115
200
250
300
350
400
450
500
(°F) (°F)
65 70 75 80 85 90 95 100 105 110 115
80
100
120
140
160
180
(PSIG)
Condensing pressure
Suction pressure
Outdoor ambient temperature
Indoor DB temperature (°F)
(PSIG)
Indoor DB temperature (°F)
Outdoor ambient temperature
86
80
75
70
86
80
75
70
65 70 75 80 85 90 95 100 105 110 115
200
250
300
350
400
450
500
(°F) (°F)
65 70 75 80 85 90 95 100 105 110 115
80
90
100
110
120
130
140
150
160
(PSIG)
Condensing pressure
Suction pressure
Outdoor ambient temperature
Indoor DB temperature (°F)
(PSIG)
Indoor DB temperature (°F)
Outdoor ambient temperature
86
80
75
70
86
80
75
70
MUZ-FS15NA MUZ-FS15NAH
75
70
65
75
70
65
(PSIG)
Condensing pressure
Outdoor ambient temperature
(°F) (°F)
(PSIG)
Suction pressure
Outdoor ambient temperature
5 15 25 35 45 55 65 75
200
250
300
350
400
Indoor DB temperature (°F)
5 15 25 35 45 55 65 75
50
70
90
110
130
150
170
190
210
Indoor DB temperature (°F)
Heating
Data are based on the condition of outdoor humidity 75%.
Air flow should be set to High speed.
Data are for heating operation without any frost.
MUZ-FS06NA MUZ-FS06NAH MUZ-FS09NA MUZ-FS09NAH
75
70
65
75
70
65
(PSIG)
Condensing pressure
Outdoor ambient temperature
(°F) (°F)
(PSIG)
Suction pressure
Outdoor ambient temperature
5 15 25 35 45 55 65 75
250
290
330
370
410
450
Indoor DB temperature (°F)
5 15 25 35 45 55 65 75
50
75
100
125
150
175
200
Indoor DB temperature (°F)
MUZ-FS12NA MUZ-FS12NAH
OBH873A

19
MUZ-FS15NA MUZ-FS15NAH
75
70
65
75
70
65
(PSIG)
Condensing pressure
Outdoor ambient temperature
(°F) (°F)
(PSIG)
Suction pressure
Outdoor ambient temperature
5 15 25 35 45 55 65 75
250
300
350
400
450
500
550
Indoor DB temperature (°F)
5 15 25 35 45 55 65 75
50
75
100
125
150
175
200
Indoor DB temperature (°F)
MUZ-FS18NA MUZ-FS18NAH
75
70
65
75
70
65
(PSIG)
Condensing pressure
Outdoor ambient temperature
(°F) (°F)
(PSIG)
Suction pressure
Outdoor ambient temperature
5 15 25 35 45 55 65 75
300
350
400
450
500
550
600
Indoor DB temperature (°F)
5 15 25 35 45 55 65 75
50
75
100
125
150
175
200
Indoor DB temperature (°F)
OBH873A

20
7-4. STANDARD OPERATION DATA
Model
MSZ-FS06NA MSZ-FS09NA MSZ-FS12NA MSZ-FS15NA MSZ-FS18NA
Item Unit Cooling Heating Cooling Heating Cooling Heating Cooling Heating Cooling Heating
Total
Capacity Btu/h 6,000 8,700 9,000 9,600 12,000 12,300 14,000 16,000 17,200 19,000
SHF — 0.96 — 0.92 — 0.83 — 0.70 — 0.67 —
Input kW 0.315 0.545 0.560 0.620 0.870 0.850 1.000 1.155 1.375 1.610
Rated frequency Hz 28 51 47.5 51 46 49 45 45 58 58
Electrical circuit
Indoor unit
MSZ-FS06NA MSZ-FS09NA MSZ-FS12NA MSZ-FS15NA MSZ-FS18NA
Power supply
V,
phase,
Hz
208/230,
1,
60
Input kW Cooling: 0.019
Heating: 0.025
Cooling: 0.025
Heating: 0.027
Cooling: 0.025
Heating: 0.036
Fan motor current A Cooling: 0.21/0.19
Heating: 0.27/0.24
Cooling: 0.27/0.24
Heating: 0.29/0.26
Cooling: 0.27/0.24
Heating: 0.36/0.33
Outdoor unit
MUZ-FS06NA
MUZ-FS06NAH
MUZ-FS09NA
MUZ-FS09NAH
MUZ-FS12NA
MUZ-FS12NAH
MUZ-FS15NA
MUZ-FS15NAH
MUZ-FS18NA
MUZ-FS18NAH
Power supply
V,
phase,
Hz
208/230,
1,
60
Input kW 0.296 0.520 0.541 0.595 0.845 0.823 0.975 1.119 1.350 1.574
Comp. current A
1.33/1.18 2.25/2.01 2.43/2.18 2.55/2.31 3.75/3.39 3.63/3.28 3.86/3.49 4.32/3.91 5.63/5.09 6.54/5.91
Fan motor current A 0.36/0.33 0.39/0.35 0.36/0.33 0.39/0.35 0.41/0.37 0.40/0.36 0.85/0.77 0.95/0.86 0.85/0.77 0.95/0.86
Refrigerant circuit
Condensing
pressure PSIG 336 295 360 295 377 333 345 363 361 410
Suction
pressure PSIG 175 110 152 110 137 104 139 109 123 107
Discharge
temperature ˚F 133 139 146 139 163 150 143 163 153 178
Condensing
temperature ˚F 104 94 108 94 112 102 106 108 109 117
Suction
temperature ˚F 69 46 61 46 63 41 53 46 47 44
Comp. shell bottom
temperature ˚F 122 126 136 126 151 137 130 142 141 159
Ref. pipe length ft. 25
Refrigerant charge (R410A) 2 lb. 9 oz. 3 lb 7 oz.
Indoor unit
Intake air
temperature
DB ˚F 80 70 80 70 80 70 80 70 80 70
WB ˚F 67 60 67 60 67 60 67 60 67 60
Discharge air
temperature
DB ˚F 64 92 58 92 57 100 56 103 52 112
WB ˚F 60 — 55 — 54 — 54 — 51 —
Fan speed (High) rpm 1,150 1,280 1,150 1,280 1,280 1,320 1,280 1,460 1,280 1,460
Airow (High) CFM 328
(Wet) 437 328
(Wet) 437 376
(Wet) 454 376
(Wet) 514 376
(Wet) 514
Outdoor unit
Intake air
temperature
DB ˚F 95 47 95 47 95 47 95 47 95 47
WB ˚F — 43 — 43 — 43 — 43 — 43
Fan speed rpm 860 890 860 890 910 900 740 800 740 800
Airow CFM 1,141 1,183 1,141 1,183 1,215 1,201 1,801 1,949 1,801 1,949
OBH873A