Mitsubishi Electronics MUZ-FH06NA, MUZ-FH09NA, MUZ-FH12NA, MUZ-FH15NA, MUZ-FH18NA User Manual

HFC

utilized

R410A

OUTDOOR UNIT

SERVICE MANUAL

Models

Revision D:

• Capacity corrections have been corrected [7-1. 2), 3)].

OBH684 REVISED EDITION-C is void.

No. OBH684

REVISED EDITION-D

MUZ-FH06NA
MUZ-FH09NA

MUZ-FH09NA

-

MUZ-FH12NA
MUZ-FH12NA

-

MUZ-FH15NA
MUZ-FH18NA
MUZ-FH18NA2

MUZ-FH06NAH
MUZ-FH09NAH

1

MUZ-FH09NAH

-

1

MUZ-FH12NAH

1

MUZ-FH12NAH

-

1

MUZ-FH15NAH
MUZ-FH18NAH
MUZ-FH18NAH2

Indoor unit service manual
MSZ-FH•NA Series (OBH683)

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. ACTUA TOR CONTROL ·····························27

9. SERVICE FUNCTIONS ······························28

10. TROUBLESHOOTING ······························· 29

11. DISASSEMBLY INSTRUCTIONS ·················51

MUZ-FH06NA
MUZ-FH09NA
MUZ-FH12NA

NOTE:

RoHS compliant products have <G> mark on the spec name plate.

MUZ-FH06NAH
MUZ-FH09NAH
MUZ-FH12NAH

PARTS CATALOG (OBB684)

Use the specifi ed refrigerant only

OBH684D

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.

Revision C:

• MUZ-FH06NA, MUZ-FH09/12NA- 1, MUZ-FH18NA2, MUZ-FH06NAH, MUZ-FH09/12NAH- 1 and MUZ-FH18NAH2 have
been added.

Revision D:

• Capacity corrections have been corrected [7-1. 2), 3)].

1

TECHNICAL CHANGES

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-FH12NA

1. Model name has been changed.

2. New service part numbers have been set. (Refer to OBB684, 1-2.)

MUZ-FH18NA

1. Model name has been changed.

MUZ-FH09NA ­MUZ-FH12NA -

MUZ-FH18NA2

1

MUZ-FH09NAH

1

MUZ-FH12NAH

MUZ-FH18NAH

MUZ-FH09NAH ­MUZ-FH12NAH -

MUZ-FH18NAH2

1

1

2

2

OBH684D

PART NAMES AND FUNCTIONS

MUZ-FH06NA MUZ-FH06NAH
MUZ-FH09NA MUZ-FH09NAH
MUZ-FH12NA MUZ-FH12NAH

(back and side)

Air inlet

Piping

Air outlet

Drain hose

Drain outlet

MUZ-FH15NA MUZ-FH15NAH
MUZ-FH18NA MUZ-FH18NAH
MUZ-FH18NA2 MUZ-FH18NAH2

(back and side)

Drain hose

Air outlet

Drain outlet

Air inlet

Piping

3

3

OBH684D

SPECIFICATION

Outdoor unit model

Capacity

Cooling 1

Rated (Minimum~Maximum)

Capacity

Rated (Maximum)

Power consumption

Rated (Minimum~Maximum)

Power consumption

Rated (Maximum)

1

EER

HSPF IV

[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]

4

Heating 47 1

Heating 17 2

Cooling 1

Heating 47 1

Heating 17 2

Heating

COP Heating

MUZ-FH06NA

MUZ-FH06NAH

Btu/h

Btu/h

Btu/h

W

W

W

6,000

(1,700 ~ 9,000)

8,700

(1,600 ~ 14,000)

5,900 (10,700) 6,700 (12,200) 8,000(13,600) 11,000 (18,000) 13,700 (20,300)

315

(100 ~ 560)

545

(110 ~ 1,270)

500

(1,000) 600 (1,440) 720 (1,900) 1,020 (2,480) 1,320 (2,800)

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

1 4.68 4.50 4.20 4.06 3.46

MUZ-FH09NA

MUZ-FH09NAH

MUZ-FH12NAH

9,000

(1,700 ~ 12,000)

(2,500 ~ 13,600)

10,900

(1,600 ~ 18,000)

(3,700 ~ 21,000)

560

(100 ~ 1,000)

710

(110 ~ 1,470)

MUZ-FH12NA

12,000

13,600

870

(170 ~ 1,150)

950

(280 ~ 2,300)

MUZ-FH15NA

MUZ-FH15NAH

MUZ-FH18NAH

15,000

(6,450 ~ 19,000)

18,000

(5,150 ~ 24,000)

1,200

(410 ~ 2,200)

1,300

(430 ~ 3,360)

MUZ-FH18NA

(6,450 ~ 21,000)

(5,150 ~ 30,000)

1,430

(410 ~ 2,220)

(430 ~ 3,390)

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

R.L.A 8.2 12.0
L.R.A 10.3 15.0

Refrigeration oil L (Model)

SNB092FQAMT SNB140FQUMT

SNB172FQKMT

0.35 (FV50S) 0.35 (FV50S) 0.40 (FV50S)

Refrigerant control Linear expansion valve

Sound level

Cooling dB(A) 47 48 49 51 52

1

Heating dB(A) 48 49 51 55 55

Defrost method Reverse cycle

W in. 31-1/2 33-1/16

Dimensions

D in. 11-1/4 13
H in. 21-5/8 34-5/8

Weight Ib. 81 83 124
External fi nish 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)

Connection meth­od

Between the indoor
& outdoor units

Liquid in. 1/4 (0.0315)
Gas in. 3/8 (0.0315) 1/2 (0.0315)
Indoor Flared
Outdoor Flared
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

MUZ-FH18NA2

MUZ-FH18NAH2

17,200

20,300

1,375

(410 ~ 2,220)

1,720

4

Test condition

OBH684D

3, 4

Mode Test

ARI

"A-2" Cooling Steady State
at rated compressor Speed

"B-2" Cooling Steady State
at rated compressor Speed

SEER

(Cooling)

HSPF

(Heating)

5

: At Intermediate compressor Speed

"B-1" Cooling Steady State
at minimum compressor Speed

"F-1" Cooling Steady State
at minimum compressor Speed

"E-V" Cooling Steady State
at Intermediate compressor Speed

"H1-2" Heating Steady State
at rated compressor Speed

"H3-2" Heating
at rated compressor Speed

"H0-1" Heating Steady State
at minimum compressor Speed

"H1-1" Heating Steady State
at minimum compressor Speed

"H2-V" Heating
at Intermediate compressor Speed

5

5

= ("Rated compressor speed" - "minimum compressor speed") / 3 + "minimum compressor speed".

Indoor air condition (°F) Outdoor air condition (°F)

Dry bulb Wet bulb Dry bulb Wet bulb

80 67 95 (75)

80 67 82 (65)

80 67 82 (65)

80 67 67 (53.5)

80 67 87 (69)

70 60 47 43

70 60 17 15

70 60 62 56.5

70 60 47 43

70 60 35 33

OPERATING RANGE

(1) POWER SUPPLY

Outdoor unit

(2) OPERATION

Mode Condition

Standard temperature 80 67 95 —

Cooling

Heating

Maximum temperature 90 73 115 —
Minimum temperature 67 57 14 —
Maximum humidity 78 % —
Standard temperature 70 60 47 43
Maximum temperature 80 67 75 65
Minimum temperature 70 60 -13 -14

Rated voltage Guaranteed voltage (V)

208/230 V

1 phase

60 Hz

Min. 187

Indoor Outdoor

DB WB DB WB

208 230 Max. 253

Intake air temperature (°F)

5

4

OBH684D

OUTLINES AND DIMENSIONS

MUZ-FH06NA MUZ-FH06NAH MUZ-FH09NA MUZ-FH09NAH MUZ-FH12NA MUZ-FH12NAH

Unit: inch

REQUIRED SPACE

*1

4 in. (100 mm) or more when

front and sides of the unit are clear

clear *1

(MUZ-FH06/09/12NA)

(MUZ-FH06/09/12NAH)

2 x hole 3/8 x 13/16

4 in. (100 mm)

or more

8 in. (200 mm)

or more *2

*2

When any 2 sides of left, right

and rear of the unit are clear

14 in. (350 mm)

or more

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

6

MUZ-FH15NA MUZ-FH15NAH MUZ-FH18NA MUZ-FH18NAH MUZ-FH18NA2 MUZ-FH18NAH2

OBH684D

Unit: inch

REQUIRED SPACE

Air in

13

34-5/8

2

17-25/32

6-7/8

16-7/16

Air in

19-11/16

4-5/16

Air out

33-1/16

*1 20 in. (500 mm) or more when front
and sides of the unit are clear

Drain hole

1-9/16

1-5/8

14-3/16

2 x hole 13/32 x 13/16

3-3/16

4 in. (100 mm)

or more

Clear *1

20 in. (500 mm)

or more *2

*2 When any 2 sides of left, right
and rear of the unit are clear

Service panel

Liquid refrigerant pipe joint
Refrigerant pipe (flared)

35

44

4 in. (100 mm)

or more

14in. (350 mm)

or more

Ø 1/4

6-1/2

3-29/32

7-11/16

Gas refrigerant pipe joint
Refrigerant pipe (flared)

Ø 1/2

7

5

OBH684D

WIRING DIAGRAM

MUZ-FH06NA MUZ-FH09NA-1 MUZ-FH12NA-

1

MUZ-FH06NAH MUZ-FH09NAH-1 MUZ-FH12NAH-

1

8

MUZ-FH09NA MUZ-FH12NA

OBH684D

MUZ-FH09NAH MUZ-FH12NAH

9

MUZ-FH15NA MUZ-FH18NA

OBH684D

10

MUZ-FH18NA2

OBH684D

11

MUZ-FH15NAH MUZ-FH18NAH

OBH684D

12

MUZ-FH18NAH2

OBH684D

13

6

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

OBH684D

REFRIGERANT SYSTEM DIAGRAM

MUZ-FH06NA MUZ-FH06NAH MUZ-FH09NA MUZ-FH09NAH MUZ-FH12NA MUZ-FH12NAH

Unit: inch

MUZ-FH15NA MUZ-FH15NAH MUZ-FH18NA MUZ-FH18NAH MUZ-FH18NA2 MUZ-FH18NAH2

Muffler

#100

Discharge
temperature
thermistor
RT62

Capillary tube
O.D. 0.157 ×
I.D. 0.094× 3-15/16
(ø4.0×ø2.4×100)

Compressor

14

Service port

LEV

Strainer

#100

Outdoor
heat

Defrost
thermistor
RT61

Refrigerant flow in cooling
Refrigerant flow in heating

exchanger

Outdoor heat
exchanger
temperature
thermistor
RT68

R.V. coil
heating ON
cooling OFF

Ambient
temperature
thermistor
RT65

Refrigerant pipe
(with heat insulator)

Flared connection

ø

Flared connection

Refrigerant pipe ø1/4
(with heat insulator)

1/2

Stop valve

Stop valve

Strainer

#100

4-way valve

Service
port

Muffler

Max. Length
A

Max. Height

difference

B

Indoor
unit

Outdoor unit

MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE

OBH684D

Refrigerant piping: ft. Piping size O.D: in.

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

Max. Length

A

Max. Height difference

B

Gas Liquid

65 40 3/8 1/4

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.

NOTE: Refrigerant piping exceeding 25 ft. requires additional refrigerant charge according to the calculation.

NOTE: Refrigerant piping exceeding 25 ft. requires additional refrigerant charge according to the calculation.

Model

MUZ-FH06NA
MUZ-FH06NAH
MUZ-FH09NA
MUZ-FH09NAH

Model

MUZ-FH12NA
MUZ-FH12NAH

Model

MUZ-FH15NA
MUZ-FH15NAH
MUZ-FH18NA
MUZ-FH18NAH
MUZ-FH18NA2
MUZ-FH18NAH2

Outdoor unit

precharged

25 30 40 50 60 65

Refrigerant piping length (one way): ft.

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)

Outdoor unit

precharged

25 30 40 50 60 65

Refrigerant piping length (one way): ft.

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)

Outdoor unit

precharged

25 30 40 50 60 70 80 90 100

Refrigerant piping length (one way): ft.

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)

15

DATA7

OBH684D

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

Indoor air Outdoor intake air DB temperature (˚F)

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

NOTE: 1. IWB : Intake air wet-bulb temperature TC : Total Capacity (x10

2. SHC is based on 80˚F of indoor Intake air DB temperature.

IWB (˚F)

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
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
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
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
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
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

SHC : Sensible Heat Capacity (x10

75 85 95 105 115

TC SHC TPC TC SHC TPC TC SHC TPC TC SHC TPC TC SHC TPC

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

3

Btu/h) TPC : Total Power Consumption (kW)

3

Btu/h)

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

MUZ-FH15NA
MUZ-FH15NAH
MUZ-FH18NA
MUZ-FH18NAH
MUZ-FH18NA2
MUZ-FH18NAH2

3) HEATING CAPACITY CORRECTIONS

MUZ-FH06NA
MUZ-FH06NAH
MUZ-FH09NA
MUZ-FH09NAH
MUZ-FH12NA
MUZ-FH12NAH

MUZ-FH15NA
MUZ-FH15NAH
MUZ-FH18NA
MUZ-FH18NAH
MUZ-FH18NA2
MUZ-FH18NAH2

1.0 0.988 0.967 -

1.0 0.985 0.963 0.933

Refrigerant piping length (one way: ft.)

25 (std.) 40 65 100

1.0 0.977 0.993 -

1.0 0.977 0.993 0.987

16

4) HEATING CAPACITY

OBH684D

Indoor air Outdoor intake air WB temperature (˚F)

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

NOTE: 1. IDB : Intake air dry-bulb temperature

2. Above data is for heating operation without any frost.

IDB (˚F)

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
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
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
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
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
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
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
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
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
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
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
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

TC : Total Capacity (x10

5 152535434555

TC TPC TC TPC TC TPC TC TPC TC TPC TC TPC TC TPC

3

Btu/h) TPC : Total Power Consumption (kW)

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.

17

7-2. PERFORMANCE CURVE

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)

OBH684D

Cooling

1.5

1.4

1.3

1.2

1.1

difference (°F)

1.0

Capacity correction factors

0.9

Indoor air Wet-bulb temperature

14 23 32 41 50 59 68 77 86 95 104 113

Cooling capacity (

Outdoor intake air DB temperature(°F)

MUZ-FH06NA MUZ-FH06NAH

at Rated frequency)

Indoor intake air Wet-bulb
temperature( F)

76

75

72
68
64

MUZ-FH09NA MUZ-FH09NAH

SHF at rating condition = 0.92

0.8

Airflow

= 381 CFM

0.7

0.6

(kW)

0.5

0.4

Total power consumption

Indoor intake air WB temperature (°F)

65 75 85 95 105 115

Outdoor intake air DB temperature (°F)

MUZ-FH12NA MUZ-FH12NAH MUZ-FH15NA MUZ-FH15NAH

SHF at rating condition = 0.83

1.1

1.0

0.9

(kW)

0.8

0.7

0.6

Total power consumption

Indoor intake air WB temperature (°F)

65 75 85 95 105 115

Outdoor intake air DB temperature (°F)

MUZ-FH18NA MUZ-FH18NAH

SHF at rating condition = 0.67

1.8

1.7

1.6

1.5

1.4

(kW)

1.3

1.2

1.1

Total power consumption

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.

Indoor intake air WB temperature (°F)

65 75 85 95 105 115

Outdoor intake air DB temperature (°F)

= 398 CFM

Airflow

Airflow

= 437 CFM

1.4

71
67
63

1.3

1.2

(kW)

1.1

1.0

0.9

Total power consumption

MUZ-FH18NA2 MUZ-FH18NAH2

1.7

71
67
63

1.6

1.5

1.4

1.3

(kW)

1.2

1.1

1.0

Total power consumption

18

SHF at rating condition = 0.7

65 75 85 95 105 115

Outdoor intake air DB temperature (°F)

SHF at rating condition = 0.67

Indoor intake air WB temperature (°F)

65 75 85 95 105 115

Outdoor intake air DB temperature (°F)

= 411 CFM

Airflow

Indoor intake air WB temperature (°F)

= 437 CFM

Airflow

71
67
63

71
67
63

71
67
63