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

3
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

5
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

8
5WIRING DIAGRAM
MUZ-FS06NA MUZ-FS09NA MUZ-FS12NA
MUZ-FS06NAH MUZ-FS09NAH MUZ-FS12NAH
OBH873A

9
MUZ-FS15NA MUZ-FS18NA
MUZ-FS15NAH MUZ-FS18NAH
OBH873A

10
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