Mitsubishi Electric MUZ-JP09WA-U1 User manual

Models
MUZ-JP09WA -U1
MUZ-JP12WA -U1
HFC
utilized
R410A
MUZ-JP09WA
PARTS CATALOG (OBB821)
SERVICE MANUAL
No. OBH821
REVISED EDITION-A
Indoor unit service manual
MSZ-JP•WA Series (OBH820)
CONTENTS
1. TECHNICAL CHANGES ······························3
2. PART NAMES AND FUNCTIONS··················4
3. SPECIFICATION ········································5
4. OUTLINES AND DIMENSIONS ·····················8
5. WIRING DIAGRAM·····································9
6. REFRIGERANT SYSTEM DIAGRAM ··········· 10
7. DATA······················································ 11
8. ACTUATOR CONTROL ····························· 18
9. SERVICE FUNCTIONS······························ 19
10. TROUBLESHOOTING ······························· 20
11. DISASSEMBLY INSTRUCTIONS················· 39
OUTDOOR UNIT
OBH821 is void.
Revision A:
• 3. SPECIFICATION has been corrected.

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.
Revision A:
• 3. SPECIFICATION has been corrected.
OBH821A

3
1TECHNICAL CHANGES
MUZ-JP09WA - U1
MUZ-JP12WA - U1
1. New model
OBH821A

4
PART NAMES AND FUNCTIONS
2
MUZ-JP09WA MUZ-JP12WA
Air outlet
Drain outlet
Piping
Drain hose
Air inlet
(back and side)
OBH821A

5
3SPECIFICATION
Outdoor unit model MUZ-JP09WA
Capacity
Rated (Minimum~Maximum)
Cooling 1 Btu/h 9,000 ( 3,800 ~ 10,000 )
Heating 47 1 Btu/h 10,900 ( 4,500 ~ 11,800 )
Capacity
Rated (Maximum) Heating 17 2 Btu/h 6,700 (7,200)
Power consumption
Rated (Minimum~Maximum)
Cooling 1 W 750 (240 - 850)
Heating 47 1 W 900 (240 - 1,000)
Power consumption
Rated (Maximum) Heating 17 2 W 700 (780)
EER 1 [SEER] 3Cooling 12.0 [ 17.0 ]
HSPF IV 4Heating 9.0
COP Heating 13.55
Power factor Cooling % 93
Heating % 94
Power supply V, phase, Hz 115, 1, 60
Max. fuse size (time delay) A 15
Min. circuit ampacity A 12
Fan motor F.L.A A 0.70
Compressor
Model KNB073FRXMC
R.L.A A 8.8
L.R.A A 11.0
Refrigeration oil
floz. (L) (Model) 9.1 (0.27) (FV50S)
Refrigerant control Linear expansion valve
Sound level 1Cooling dB(A) 46
Heating dB(A) 50
Airflow
High - Med. - Low
Cooling CFM 1,105 - 1,105 - 1,063
Heating CFM 1,282 - 1,105 - 1,105
Fan speed
High - Med. - Low
Cooling rpm 770 - 770 - 740
Heating rpm 890 - 770 - 770
Defrost method Reverse cycle
Dimensions
W in. 31-1/2
D in. 11-1/4
H in. 21-5/8
Weight Ib. 73
External finish Munsell 3Y 7.8/1.1
Refrigerant piping Not supplied
Refrigerant pipe size
(Min. wall thickness)
Liquid in. 1/4 (0.0315)
Gas in. 3/8 (0.0315)
Connection method Indoor Flared
Outdoor Flared
Between the indoor &
outdoor units
Height difference ft. 40
Piping length ft. 65
Refrigerant charge (R410A) 1 lb. 12 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
3: Test condition (Refer to page 7.)
4: Test condition (Refer to page 7.)
OBH821A

6
Outdoor unit model MUZ-JP12WA
Capacity
Rated (Minimum~Maximum)
Cooling 1 Btu/h 12,000 ( 3,800 ~ 12,200 )
Heating 47 1 Btu/h 12,200 ( 4,500 ~ 14,500 )
Capacity
Rated (Maximum) Heating 17 2 Btu/h 7,600 (9,000)
Power consumption
Rated (Minimum~Maximum)
Cooling 1 W 1,210 (240 - 1,300)
Heating 47 1 W 990 (240 - 1,220)
Power consumption
Rated (Maximum) Heating 17 2 W 800 (990)
EER 1 [SEER] 3Cooling 9.9 [ 17.0 ]
HSPF IV 4Heating 9.0
COP Heating 13.61
Power factor Cooling % 93
Heating % 94
Power supply V , phase , Hz 115,1, 60
Max. fuse size (time delay) A 20
Min. circuit ampacity A 14
Fan motor F.L.A A 0.70
Compressor
Model KNB073FRXMC
R.L.A A 10.4
L.R.A A 13.0
Refrigeration oil
floz. (L) (Model) 9.1 (0.27) (FV50S)
Refrigerant control Linear expansion valve
Sound level 1Cooling dB(A) 49
Heating dB(A) 51
Airflow
High - Med. - Low
Cooling CFM 1,105 - 1,105 - 1,063
Heating CFM 1,282 - 1,105 - 1,105
Fan speed
High - Med. - Low
Cooling rpm 770 - 770 - 740
Heating rpm 890 - 770 - 770
Defrost method Reverse cycle
Dimensions
W in. 31-1/2
D in. 11-1/4
H in. 21-5/8
Weight Ib. 73
External finish Munsell 3Y 7.8/1.1
Refrigerant piping Not supplied
Refrigerant pipe size
(Min. wall thickness)
Liquid in. 1/4 (0.0315)
Gas in. 3/8 (0.0315)
Connection method Indoor Flared
Outdoor Flared
Between the indoor &
outdoor units
Height difference ft. 40
Piping length ft. 65
Refrigerant charge (R410A) 1 lb. 12 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
3: Test condition (Refer to page 7.)
4: Test condition (Refer to page 7.)
OBH821A

7
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 -4 -5
OPERATING RANGE
(1) POWER SUPPLY
Rated voltage Guaranteed voltage (V)
Outdoor unit
115 V
1 phase
60 Hz
Min. 103 115 Max. 127
OBH821A

8
OUTLINES AND DIMENSIONS
4
Unit: inch
MUZ-JP09WA MUZ-JP12WA
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
Liquid refrigerant pipe joint
Refrigerant pipe (flared) Ø 1/4
Gas refrigerant pipe joint
Refrigerant pipe (flared) Ø 3/8
REQUIRED SPACE
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
holes
OBH821A

9
5WIRING DIAGRAM
MUZ-JP09WA MUZ-JP12WA
OBH821A

10
6REFRIGERANT SYSTEM DIAGRAM
Unit: Inch (mm)
Flared connection
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
(with strainer)
Stop valve
(with service port)
Refrigerant flow in cooling
Compressor
4-way valve
Refrigerant flow in heating
Refrigerant pipe ø3/8 (ø9.52)
(with heat insulator)
Refrigerant pipe ø1/4 (ø6.35)
(with heat insulator)
R.V. coil
heating ON
cooling OFF
Strainer
#100
LEV
Muffler
Capillary tube
O.D. 0.118 × I.D. 0.055
× 10-1/4
(ø3.0 × ø1.4
× 260)
Muffler
Service port
Service port
Outdoor
heat
exchanger
Defrost
thermistor
RT61
Ambient
temperature
thermistor
RT65
Outdoor heat
exchanger
temperature
thermistor
RT68
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-JP09WA
MUZ-JP12WA 65 40 3/8 1/4
ADDITIOWAL 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-JP09WA
MUZ-JP12WA 1 lb. 12 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)
MUZ-JP09WA MUZ-JP12WA
OBH821A