Mitsubishi Electric MUZ-FH06NA User manual

SERVICE MANUAL
Models
OUTDOOR UNIT
Indoor unit service manual
MSZ-FH•NA Series (OBH683)
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
HFC
utilized
R410A
No. OBH684
REVISED EDITION-C
PARTS CATALOG (OBB684)
MUZ-FH06NA
MUZ-FH09NA
MUZ-FH12NA
MUZ-FH06NAH
MUZ-FH09NAH
MUZ-FH12NAH
Please void OBH684 REVISED EDITION-B.
Revision C:
• MUZ-FH06NA, MUZ-FH09/12NA- 1, MUZ-
FH18NA2, MUZ-FH06NAH, MUZ-
FH09/12NAH- 1and MUZ-FH18NAH2
have been added.
MUZ-FH06NA
MUZ-FH09NA
MUZ-FH09NA -1
MUZ-FH12NA
MUZ-FH12NA -1
MUZ-FH15NA
MUZ-FH18NA
MUZ-FH18NA2
MUZ-FH06NAH
MUZ-FH09NAH
MUZ-FH09NAH -1
MUZ-FH12NAH
MUZ-FH12NAH -1
MUZ-FH15NAH
MUZ-FH18NAH
MUZ-FH18NAH2
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···········14
7. DATA······················································16
8. ACTUATOR CONTROL·····························27
9. SERVICE FUNCTIONS······························28
10. TROUBLESHOOTING·······························29
11. DISASSEMBLY INSTRUCTIONS·················51

2
1TECHNICAL CHANGES
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:
• 3. SPECIFICATION has been modified.
(The values of COP have been modified.)
• 10. TROUBLESHOOTING has been modified.
Revision B:
• MUZ-FH18NA and MUZ-FH18NAH have been added.
MUZ-FH09NA MUZ-FH09NAH
MUZ-FH12NA MUZ-FH12NAH
MUZ-FH15NA MUZ-FH15NAH
1. New model
MUZ-FH18NA MUZ-FH18NAH
1. New model
MUZ-FH06NA MUZ-FH06NAH
1. New model
MUZ-FH09NA MUZ-FH09NA - 1MUZ-FH09NAH MUZ-FH09NAH - 1
MUZ-FH12NA MUZ-FH12NA - 1MUZ-FH12NAH MUZ-FH12NAH - 1
1. Model name has been changed.
2. New service part numbers have been set. (Refer to OBB684, 1-2.)
MUZ-FH18NA MUZ-FH18NA2 MUZ-FH18NAH MUZ-FH18NAH2
1. Model name has been changed.
Revision C:
• MUZ-FH06NA, MUZ-FH09/12NA- 1, MUZ-FH18NA2, MUZ-FH06NAH, MUZ-FH09/12NAH- 1and MUZ-FH18NAH2 have
been added.
OBH684C

3
MUZ-FH06NA MUZ-FH06NAH
MUZ-FH09NA MUZ-FH09NAH
MUZ-FH12NA MUZ-FH12NAH
MUZ-FH15NA MUZ-FH15NAH
MUZ-FH18NA MUZ-FH18NAH
MUZ-FH18NA2 MUZ-FH18NAH2
Piping
Air outlet
Drain outlet
Air inlet
(back and side)
Drain hose
PART NAMES AND FUNCTIONS
2
Air outlet
Drain outlet
Piping
Drain hose
Air inlet
(back and side)
OBH684C

4
3SPECIFICATION
Outdoor unit model
MUZ-FH06NA
MUZ-FH06NAH MUZ-FH09NA MUZ-FH09NAH MUZ-FH12NA MUZ-FH12NAH MUZ-FH15NA MUZ-FH15NAH MUZ-FH18NA MUZ-FH18NAH
MUZ-FH18NA2
MUZ-FH18NAH2
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)
15,000
(6,450 ~ 19,000)
17,200
(6,450 ~ 21,000)
Heating 47 1 Btu/h
8,700
(1,600 ~ 14,000)
10,900
(1,600 ~ 18,000)
13,600
(3,700 ~ 21,000)
18,000
(5,150 ~ 24,000)
20,300
(5,150 ~ 30,000)
Capacity
Rated (Maximum) Heating 17 2 Btu/h
5,900 (10,700) 6,700 (12,200) 8,000(13,600) 11,000 (18,000) 13,700 (20,300)
Power consumption
Rated (Minimum~Maximum)
Cooling 1 W
315
(100 ~ 560)
560
(100 ~ 1,000)
870
(170 ~ 1,150)
1,200
(410 ~ 2,200)
1,430
(410 ~ 2,220)
1,375
(410 ~ 2,220)
Heating 47 1 W
545
(110 ~ 1,270)
710
(110 ~ 1,470)
950
(280 ~ 2,300)
1,300
(430 ~ 3,360)
1,720
(430 ~ 3,390)
Power consumption
Rated (Maximum) Heating 17 2 W
500 (1,000) 600 (1,440) 720 (1,900) 1,020 (2,480) 1,320 (2,800)
EER 1 [SEER] 3
Cooling 19.1 [33.1] 16.1 [30.5] 13.8 [26.1] 12.5 [22.0] 12.0 [21.0] 12.5 [21.0]
HSPF IV 4Heating NA: 13.5 NA: 13.5 NA: 12.5 NA: 12.0 NA: 12.0 NA2: 12.0
NAH: 12.5 NAH: 12.5 NAH: 11.5 NAH: 11.0 NAH: 11.0 NAH2: 11.0
COP Heating 1 4.68 4.50 4.20 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 11 16
Fan motor F.L.A 0.50 0.93
Compressor
Model
SNB092FQAMT SNB140FQUMT SNB172FQKMT
R.L.A 8.2 12.0
L.R.A 10.3 15.0
Refrigeration oil L (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) 48 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. 81 83 124
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 meth-
od
Indoor Flared
Outdoor Flared
Between the indoor
& outdoor units
Height difference 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: (Heating) — Indoor: 70˚FDB, 60˚FWB, Outdoor: 17˚FDB, 15˚FWB
OBH684C

5
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 -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
OBH684C

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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-FH06/09/12NA)
(MUZ-FH06/09/12NAH)
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-FH06NA MUZ-FH06NAH MUZ-FH09NA MUZ-FH09NAH MUZ-FH12NA MUZ-FH12NAH
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MUZ-FH15NA MUZ-FH15NAH MUZ-FH18NA MUZ-FH18NAH MUZ-FH18NA2 MUZ-FH18NAH2
Unit: inch
16-7/16
1-9/16
1-5/8
Drain hole
6-7/8 19-11/16
13
2
Air in
Air in
Air out
2 x hole 13/32 x 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) Ø 1/4
Gas refrigerant pipe joint
Refrigerant pipe (flared) Ø 1/2
*1 20 in. (500 mm) or more when front
and sides of the unit are clear
14in. (350 mm)
or more
4 in. (100 mm)
or more
REQUIRED SPACE
Clear *1
4 in. (100 mm)
or more
20 in. (500 mm)
or more *2
*2 When any 2 sides of left, right
and rear of the unit are clear
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5WIRING DIAGRAM
MUZ-FH06NA MUZ-FH09NA- 1MUZ-FH12NA- 1
MUZ-FH06NAH MUZ-FH09NAH- 1MUZ-FH12NAH- 1
OBH684C

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MUZ-FH09NA MUZ-FH12NA
MUZ-FH09NAH MUZ-FH12NAH
OBH684C

10
MUZ-FH15NA MUZ-FH18NA
OBH684C

11
MUZ-FH18NA2
OBH684C

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MUZ-FH15NAH MUZ-FH18NAH
OBH684C

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MUZ-FH18NAH2
OBH684C

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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 strainar)
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
Service
port
Muffler
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
Service port
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
#100
Outdoor heat
exchanger
temperature
thermistor
RT68
Ambient
temperature
thermistor
RT65
Strainer
#100
Service
port
MUZ-FH06NA MUZ-FH06NAH MUZ-FH09NA MUZ-FH09NAH MUZ-FH12NA MUZ-FH12NAH
MUZ-FH15NA MUZ-FH15NAH MUZ-FH18NA MUZ-FH18NAH MUZ-FH18NA2 MUZ-FH18NAH2
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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 difference
B Gas Liquid
MUZ-FH06NA
MUZ-FH06NAH
MUZ-FH09NA
MUZ-FH09NAH
MUZ-FH12NA
MUZ-FH12NAH
65 40 3/8 1/4
MUZ-FH15NA
MUZ-FH15NAH
MUZ-FH18NA
MUZ-FH18NAH
MUZ-FH18NA2
MUZ-FH18NAH2
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-FH06NA
MUZ-FH06NAH
MUZ-FH09NA
MUZ-FH09NAH
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 65
MUZ-FH12NA
MUZ-FH12NAH 2 lb. 9 oz. 0 1.62 4.86 8.10 11.34 12.96
Calculation: X oz. = 1.62/5 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-FH15NA
MUZ-FH15NAH
MUZ-FH18NA
MUZ-FH18NAH
MUZ-FH18NA2
MUZ-FH18NAH2
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)
OBH684C

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DATA7
MUZ-FH06NA MUZ-FH06NAH MUZ-FH09NA MUZ-FH09NAH MUZ-FH12NA MUZ-FH12NAH
MUZ-FH15NA MUZ-FH15NAH MUZ-FH18NA MUZ-FH18NAH MUZ-FH18NA2 MUZ-FH18NAH2
7-1. PERFORMANCE DATA
1) COOLING CAPACITY
Model
Indoor air Outdoor intake air DB temperature (˚F)
IWB (˚F) 75 85 95 105 115
TC SHC TPC TC SHC TPC TC SHC TPC TC SHC TPC TC SHC TPC
MUZ-FH06NA
MUZ-FH06NAH
71 7.4 6.1 0.28 6.9 5.7 0.31 6.5 5.3 0.33 6.0 5.0 0.35 5.5 4.6 0.36
67 7.0 6.7 0.26 6.5 6.2 0.29 6.0 5.8 0.32 5.6 5.4 0.33 5.1 4.9 0.35
63 6.5 7.2 0.25 6.1 6.6 0.28 5.6 6.2 0.30 5.1 5.6 0.32 4.7 5.1 0.33
MUZ-FH09NA
MUZ-FH09NAH
71 11.0 8.7 0.50 10.3 8.1 0.55 9.7 7.6 0.59 9.0 7.1 0.62 8.3 6.5 0.64
67 10.4 9.6 0.47 9.7 8.9 0.52 9.0 8.3 0.56 8.4 7.7 0.59 7.7 7.1 0.62
63 9.8 10.3 0.45 9.1 9.6 0.50 8.5 8.9 0.53 7.7 8.1 0.57 7.0 7.4 0.59
MUZ-FH12NA
MUZ-FH12NAH
71 14.7 10.2 0.77 13.7 9.6 0.85 12.9 9.0 0.91 12.0 8.4 0.96 11.0 7.7 1.00
67 13.9 11.6 0.73 13.0 10.8 0.80 12.0 10.0 0.87 11.2 9.3 0.92 10.3 8.5 0.97
63 13.1 12.6 0.70 12.1 11.7 0.77 11.3 10.9 0.83 10.3 9.9 0.89 9.4 9.0 0.92
MUZ-FH15NA
MUZ-FH15NAH
71 18.4 10.4 1.07 17.2 9.7 1.17 16.1 9.1 1.26 15.0 8.5 1.33 13.8 7.8 1.38
67 17.4 12.2 1.01 16.2 11.3 1.11 15.0 10.5 1.20 14.0 9.8 1.27 12.8 9.0 1.33
63 16.4 13.6 0.96 15.2 12.6 1.06 14.1 11.8 1.15 12.8 10.7 1.22 11.7 9.8 1.27
MUZ-FH18NA
MUZ-FH18NAH
71 21.1 11.3 1.27 19.7 10.6 1.39 18.5 9.9 1.50 17.2 9.2 1.58 15.8 8.5 1.64
67 20.0 13.4 1.20 18.6 12.4 1.32 17.2 11.5 1.43 16.0 10.7 1.52 14.7 9.9 1.59
63 18.7 15.1 1.14 17.4 14.0 1.27 16.2 13.0 1.37 14.7 11.8 1.46 13.4 10.8 1.52
MUZ-FH18NA2
MUZ-FH18NAH2
71 21.1 11.3 1.22 19.7 10.6 1.34 18.5 9.9 1.44 17.2 9.2 1.52 15.8 8.5 1.58
67 20.0 13.4 1.16 18.6 12.4 1.27 17.2 11.5 1.38 16.0 10.7 1.46 14.7 9.9 1.53
63 18.7 15.1 1.10 17.4 14.0 1.22 16.2 13.0 1.31 14.7 11.8 1.40 13.4 10.8 1.46
NOTE: 1. IWB : Intake air wet-bulb temperature TC : Total Capacity (x103Btu/h)
SHC : Sensible Heat Capacity (x103Btu/h) TPC : Total Power Consumption (kW)
2. SHC is based on 80˚F of indoor Intake air DB temperature.
2) COOLING CAPACITY CORRECTIONS
Refrigerant piping length (one way: ft.)
25 (std.) 40 65 100
MUZ-FH06NA
MUZ-FH06NAH
MUZ-FH09NA
MUZ-FH09NAH
MUZ-FH12NA
MUZ-FH12NAH
1.0 0.954 0.878 -
MUZ-FH15NA
MUZ-FH15NAH
MUZ-FH18NA
MUZ-FH18NAH
MUZ-FH18NA2
MUZ-FH18NAH2
1.0 0.954 0.878 0.771
OBH684C

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3) HEATING CAPACITY
Model
Indoor air Outdoor intake air WB temperature (˚F)
IDB (˚F) 5 152535434555
TC TPC TC TPC TC TPC TC TPC TC TPC TC TPC TC TPC
MUZ-FH06NA
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-FH06NAH
75 3.8 0.45 5.0 0.53 6.3 0.60 7.5 0.53 8.5 0.55 8.7 0.56 9.9 0.58
70 4.1 0.44 5.4 0.52 6.5 0.59 7.7 0.51 8.7 0.54 9.0 0.55 10.1 0.57
65 4.4 0.42 5.5 0.50 6.8 0.58 8.0 0.50 9.0 0.53 9.2 0.53 10.4 0.56
MUZ-FH09NA
75 4.8 0.42 6.3 0.53 7.9 0.62 9.4 0.69 10.6 0.73 11.0 0.74 12.4 0.77
70 5.2 0.40 6.7 0.51 8.2 0.61 9.6 0.67 10.9 0.71 11.2 0.72 12.7 0.75
65 5.5 0.38 6.9 0.49 8.6 0.59 10.0 0.66 11.2 0.69 11.6 0.70 13.0 0.74
MUZ-FH09NAH
75 4.8 0.55 6.3 0.66 7.9 0.75 9.4 0.69 10.6 0.73 11.0 0.74 12.4 0.77
70 5.2 0.53 6.7 0.64 8.2 0.74 9.6 0.67 10.9 0.71 11.2 0.72 12.7 0.75
65 5.5 0.51 6.9 0.62 8.6 0.72 10.0 0.66 11.2 0.69 11.6 0.70 13.0 0.74
MUZ-FH12NA
75 6.0 0.56 7.9 0.71 9.9 0.83 11.8 0.93 13.3 0.97 13.7 0.99 15.5 1.03
70 6.5 0.54 8.4 0.68 10.2 0.81 12.0 0.90 13.6 0.95 14.0 0.97 15.8 1.01
65 6.8 0.51 8.6 0.66 10.7 0.78 12.4 0.88 14.0 0.93 14.4 0.94 16.2 0.99
MUZ-FH12NAH
75 6.0 0.69 7.9 0.84 9.9 0.96 11.8 0.93 13.3 0.97 13.7 0.99 15.5 1.03
70 6.5 0.67 8.4 0.81 10.2 0.94 12.0 0.90 13.6 0.95 14.0 0.97 15.8 1.01
65 6.8 0.64 8.6 0.79 10.7 0.91 12.4 0.88 14.0 0.93 14.4 0.94 16.2 0.99
MUZ-FH15NA
75 7.9 0.77 10.4 0.97 13.1 1.14 15.6 1.27 17.6 1.33 18.1 1.35 20.5 1.40
70 8.6 0.73 11.1 0.94 13.5 1.11 15.9 1.24 18.0 1.30 18.5 1.33 21.0 1.38
65 9.0 0.70 11.3 0.90 14.1 1.07 16.5 1.20 18.5 1.27 19.1 1.29 21.4 1.35
MUZ-FH15NAH
75 7.9 0.90 10.4 1.10 13.1 1.27 15.6 1.27 17.6 1.33 18.1 1.35 20.5 1.40
70 8.6 0.86 11.1 1.07 13.5 1.24 15.9 1.24 18.0 1.30 18.5 1.33 21.0 1.38
65 9.0 0.83 11.3 1.03 14.1 1.20 16.5 1.20 18.5 1.27 19.1 1.29 21.4 1.35
MUZ-FH18NA
75 8.9 1.01 11.8 1.28 14.7 1.51 17.6 1.68 19.8 1.76 20.4 1.79 23.1 1.86
70 9.6 0.97 12.5 1.24 15.2 1.47 18.0 1.63 20.3 1.72 20.9 1.75 23.6 1.82
65 10.2 0.93 12.8 1.19 15.9 1.42 18.6 1.59 20.9 1.68 21.5 1.70 24.2 1.79
MUZ-FH18NAH
75 8.9 1.14 11.8 1.41 14.7 1.64 17.6 1.68 19.8 1.76 20.4 1.79 23.1 1.86
70 9.6 1.10 12.5 1.37 15.2 1.60 18.0 1.63 20.3 1.72 20.9 1.75 23.6 1.82
65 10.2 1.06 12.8 1.32 15.9 1.55 18.6 1.59 20.9 1.68 21.5 1.70 24.2 1.79
MUZ-FH18NA2
75 8.9 1.01 11.8 1.28 14.7 1.51 17.6 1.68 19.8 1.76 20.4 1.79 23.1 1.86
70 9.6 0.97 12.5 1.24 15.2 1.47 18.0 1.63 20.3 1.72 20.9 1.75 23.6 1.82
65 10.2 0.93 12.8 1.19 15.9 1.42 18.6 1.59 20.9 1.68 21.5 1.70 24.2 1.79
MUZ-FH18NAH2
75 8.9 1.14 11.8 1.41 14.7 1.64 17.6 1.68 19.8 1.76 20.4 1.79 23.1 1.86
70 9.6 1.10 12.5 1.37 15.2 1.60 18.0 1.63 20.3 1.72 20.9 1.75 23.6 1.82
65 10.2 1.06 12.8 1.32 15.9 1.55 18.6 1.59 20.9 1.68 21.5 1.70 24.2 1.79
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.
How to operate with fixed operational frequency of the compressor.
1. Press the EMERGENCY OPERATION switch on the front of the indoor unit, and select either EMERGENCY COOL
mode or EMERGENCY HEAT mode before starting to operate the air conditioner.
2. The compressor starts with operational frequency.
3. The fan speed of the indoor unit is High.
4. This operation continues for 30 minutes.
5. In order to release this operation, press the EMERGENCY OPERATION switch twice or once, or press any button on
the remote controller.
OBH684C

18
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
= 398 CFM
Airflow
Outdoor intake air DB temperature (°F)
Total power consumption
(kW)
MUZ-FH06NA MUZ-FH06NAH
MUZ-FH12NA MUZ-FH12NAH MUZ-FH15NA MUZ-FH15NAH
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
0.9
1.0
1.1
1.2
1.3
1.4
Indoor intake air WB temperature (°F)
SHF at rating condition = 0.7
= 411 CFM
Airflow
Outdoor intake air DB temperature (°F)
Total power consumption
(kW)
MUZ-FH18NA MUZ-FH18NAH
71
67
63
65 75 85 95 105 115
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
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
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
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
0.4
0.5
0.6
0.7
0.8
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-FH09NA MUZ-FH09NAH
MUZ-FH18NA2 MUZ-FH18NAH2
OBH684C

19
65
70
75
-5 5 152535455565
0.2
0.4
0.6
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 152535455565
0.2
0.4
0.6
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 152535455565
0.3
0.6
0.9
1.2
Indoor intake air DB temperature (°F)
= 454 CFM
Airflow
Outdoor intake air WB temperature (°F)
Total power consumption
(kW)
Heating
MUZ-FH15NA
Indoor air Dry-bulb temperature
difference (°F)
Outdoor intake air WB temperature (°F)
-4 5 142332415059
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 152535455565
0.50
0.75
1.00
1.25
1.50
Indoor intake air DB temperature (°F)
= 454 CFM
Airflow
Outdoor intake air WB temperature (°F)
Total power consumption
(kW)
MUZ-FH09NA
MUZ-FH12NA
65
70
75
-5 5 152535455565
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
Indoor intake air DB temperature (°F)
= 437 CFM
Airflow
Outdoor intake air WB temperature (°F)
Total power consumption
(kW)
65
70
75
-5 5 152535455565
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 152535455565
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-FH09NAH
MUZ-FH12NAH
MUZ-FH15NAH
65
70
75
-5 5 152535455565
0.5
0.7
0.9
1.1
1.3
1.5
Indoor intake air DB temperature (°F)
= 497 CFM
Airflow
Outdoor intake air WB temperature (°F)
Total power consumption
(kW)
MUZ-FH06NA MUZ-FH06NAH
OBH684C

20
MUZ-FH18NA
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 152535455565
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)
65
70
75
-5 5 152535455565
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-FH18NAH
65
70
75
-5 5 152535455565
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)
65
70
75
-5 5 152535455565
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)
7-3. CONDENSING PRESSURE
Cooling
Data are based on the condition of indoor humidity 50 %.
Air flow should be set to High speed.
MUZ-FH06NA MUZ-FH06NAH
65 70 75 80 85 90 95 100 105
200
250
300
350
400
450
500
(°F) (°F)
60 65 70 75 80 85 90 95 100 105
90
110
130
150
170
190
(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
200
250
300
350
400
450
500
(°F) (°F)
60 65 70 75 80 85 90 95 100 105
90
110
130
150
170
190
(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-FH09NA MUZ-FH09NAH
MUZ-FH18NA2 MUZ-FH18NAH2
OBH684C