Mitsubishi Electric Mr.Slim MUZ-GE09NA User manual

SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES ··································· 3
2. PART NAMES AND FUNCTIONS····················· 4
3. SPECIFICATION················································ 6
4. OUTLINES AND DIMENSIONS ······················ 10
5. WIRING DIAGRAM·········································· 13
6. REFRIGERANT SYSTEM DIAGRAM············· 25
7. DATA································································ 28
8. ACTUATOR CONTROL··································· 42
9. SERVICE FUNCTIONS ··································· 43
10. TROUBLESHOOTING····································· 44
11. DISASSEMBLY INSTRUCTIONS···················· 64
Models
SPLIT-TYPE AIR CONDITIONERS
OUTDOOR UNIT
Indoor unit service manual
MSZ-GE•NA MSY-GE•NA Series (OBH548)
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
HFC
utilized
R410A
No. OBH549
REVISED EDITION-F
PARTS CATALOG (OBB549)
Please void OBH549 REVISED EDITION-E.
MUZ-GE09NA/NA2
MUZ-GE12NA/NA2
MUZ-GE15NA, -1/NA2
MUZ-GE09NA
MUZ-GE09NA2
MUZ-GE12NA
MUZ-GE12NA2
MUZ-GE15NA, -1
MUZ-GE15NA2
MUZ-GE18NA, -1
MUZ-GE24NA
Revision F:
• MUZ-GE09/12/15NA2, MUZ-GE09/12/15NAH2
and MUY-GE09/12/15NA2 have been added.
MUZ-GE09NAH
MUZ-GE09NAH2
MUZ-GE12NAH
MUZ-GE12NAH2
MUZ-GE15NAH
MUZ-GE15NAH2
MUZ-GE18NAH
MUY-GE09NA/NA2
MUY-GE12NA/NA2
MUY-GE15NA, -1/NA2
TM
MUY-GE18NA, -1
MUY-GE24NA
MUY-GE09NA
MUY-GE09NA2
MUY-GE12NA
MUY-GE12NA2
MUY-GE15NA, -1
MUY-GE15NA2
MUZ-GE09NAH/NAH2
MUZ-GE12NAH/NAH2
MUZ-GE15NAH/NAH2

2
Revision A:
• MUZ-GE24NA and MUY-GE24NA have been added.
Revision B:
• Descriptions regarding the outdoor fan motor has been corrected.
Revision C:
• MUZ-GE15NA-
1
, MUZ-GE18NA-
1
,MUY-GE15NA-
1
,and MUY-GE18NA-
1
have been added.
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 D:
• Specification has been corrected. [Capacity Capacity Rated (Maximum), Power consumption Power consumption Rated (Maximum)]
Revision E:
• MUZ-GE09NAH, MUZ-GE12NAH, MUZ-GE15NAH and MUZ-GE18NAH have been added.
Revision F:
• MUZ-GE09/12/15NA2, MUZ-GE09/12/15NAH2 and MUY-GE09/12/15NA2 have been added.
OBH549F

3
MUZ-GE09NA MUY-GE09NA
MUZ-GE12NA MUY-GE12NA
MUZ-GE15NA MUY-GE15NA
MUZ-GE18NA MUY-GE18NA
MUZ-GE24NA MUY-GE24NA
1. New model
MUZ-GE15NA MUZ-GE15NA - 1
MUZ-GE18NA MUZ-GE18NA - 1
1. Compressor has been changed.
2. Inverter P.C. board has been changed.
MUY-GE15NA MUY-GE15NA - 1
MUY-GE18NA MUY-GE18NA - 1
1. Compressor has been changed.
2. Inverter P.C. board has been changed.
MUZ-GE09NA MUZ-GE09NAH
1. Defrost heater has been added.
2. Reactor has been changed.
3. Inverter P.C. board has been changed.
MUZ-GE12NA MUZ-GE12NAH
MUZ-GE15NA - 1
MUZ-GE15NAH
MUZ-GE18NA - 1
MUZ-GE18NAH
1. Defrost heater has been added.
2. Inverter P.C. board has been changed.
MUZ-GE09NA MUZ-GE09NA2
MUZ-GE12NA MUZ-GE12NA2
MUZ-GE15NA - 1
MUZ-GE15NA2
MUZ-GE09NAH MUZ-GE09NAH2
MUZ-GE12NAH MUZ-GE12NAH2
MUZ-GE15NAH MUZ-GE15NAH2
MUY-GE09NA MUY-GE09NA2
MUY-GE12NA
MUY-GE12NA2
MUY-GE15NA - 1
MUY-GE15NA2
1. SEER and HSPF have been added.
1TECHNICAL CHANGES
OBH549F

4
MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA
MUZ-GE09NA2 MUZ-GE12NA2 MUZ-GE15NA2
MUZ-GE09NAH MUZ-GE12NAH MUZ-GE15NAH
MUZ-GE09NAH2 MUZ-GE12NAH2 MUZ-GE15NAH2
MUY-GE09NA MUY-GE12NA MUY-GE15NA
MUY-GE09NA2 MUY-GE12NA2 MUY-GE15NA2
Air outlet
Drain outlet
Piping
Drain hose
Air inlet
(back and side)
MUZ-GE18NA
MUZ-GE18NAH
MUY-GE18NA
Air inlet
(back and side)
Piping
Air outlet
Drain hose
Drain outlet
2PART NAMES AND FUNCTIONS
OBH549F

5
MUZ-GE24NA
MUY-GE24NA
Piping
Air outlet
Drain outlet
Air inlet
(back and side)
Drain hose
OBH549F

6
Outdoor unit model
MUZ-GE09NA
MUZ-GE09NA2
MUZ-GE09NAH
MUZ-GE09NAH2
MUY-GE09NA
MUY-GE09NA2
MUZ-GE12NA
MUZ-GE12NA2
MUZ-GE12NAH
MUZ-GE12NAH2
MUY-GE12NA
MUY-GE12NA2
Capacity
Rated (Minimum~Maximum)
Cooling 1 Btu/h 9,000
( 3,800 ~ 12,200 ) 9,000 ( 3,800 ~ 12,200 ) 12,000 ( 3,800 ~ 13,600 ) 12,000 ( 3,800 ~ 13,600 )
Heating 47 1 Btu/h 10,900
( 4,500 ~ 14,100 ) —14,400 ( 5,500 ~ 18,100 ) —
Capacity
Rated (Maximum) Heating 17 2 Btu/h 6,600 (8,700) — 8,800 (11,200) —
Power consumption
Rated (Minimum~Maximum) Cooling 1 W
660 (205~1,200) 660 (205~1,200) 960 (205~1,300) 960 (205~1,300)
Heating 47 1W 760 (255~1,200) — 1,170 (340~1,660) —
Power consumption
Rated (Maximum) Heating 17 2 W 700 (950) — 900 (1,200) —
EER 1
[SEER] 3 Cooling
09NA/H: 13.6 [ 21.0 ] 09NA: 13.6 [ 21.0 ] 12NA/H: 12.5 [ 20.5 ] 12NA/H: 12.5 [ 20.5 ]
09NA2/H2: 13.6 [23.2] 09NA2: 13.6 [23.2] 12NA2/H2: 12.5 [22.7] 12NA2/H2: 12.5 [22.7]
HSPF IV 4 Heating 09NA/H: 10.0 —12NA/H: 10.0 —09NA2: 11.0 12NA2: 11.4
09NAH2: 10.1 12NAH2: 10.8
COP Heating 1 4.20 — 3.61 —
Power supply V , phase , Hz 208/230 , 1 , 60
Max. fuse size (time delay) A 15
Min. circuit ampacity A 12
Fan motor F.L.A 0.50
Compressor
Model KNB073FQDHC KNB092FQAHC
R.L.A 6.6 4.9 6.6 4.9
L.R.A 8.2 6.1 8.2 6.1
Refrigeration oil
(Model) L 0.32 (NEO22)
Refrigerant control Linear expansion valve
Sound level 1Cooling dB(A) 46 49
Heating dB(A) 50 — 51 —
Defrost method Reverse cycle
Dimensions W in. 31-1/2 D in. 11-1/4
H in. 21-5/8
Weight Ib. 66 77
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)
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. 2 lb. 9 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
3SPECIFICATION
OBH549F

7
Outdoor unit model
MUZ-GE15NA
MUZ-GE15NA
-
1
MUZ-GE15NA2
MUZ-GE15NAH
MUZ-GE15NAH2
MUY-GE15NA
MUY-GE15NA -
1
MUY-GE15NA2
MUZ-GE18NA
MUZ-GE18NA
-
1
MUZ-GE18NAH
MUY-GE18NA
MUY-GE18NA
-
1
Capacity
Rated (Minimum~Maximum)
Cooling 1 Btu/h 14,000
( 3,100 ~ 18,200 ) 14,000 ( 3,100 ~ 18,200 ) 17,200 ( 3,700 ~ 18,700 ) 17,200 ( 3,700 ~ 18,700 )
Heating 47 1 Btu/h 18,000
( 4,800 ~ 20,900 ) —21,600 ( 3,500 ~ 25,200 ) —
Capacity
Rated (Maximum) Heating 17 2 Btu/h 11,300 (15,900) — 13,400 (17,200) —
Power consumption
Rated (Minimum~Maximum) Cooling 1 W
1,080 (160 ~ 2,000) 1,080 (160 ~ 2,000) 1,640 (240 ~ 2,070) 1,640 (240 ~ 2,070)
Heating 47 1W 1,600 (270 ~ 2,010) — 1,900 (230 ~ 2,680) —
Power consumption
Rated (Maximum) Heating 17 2 W 1,150 (1,950) — 1,450 (2,080) —
EER 1
[SEER] 3 Cooling
15NA/H: 13.0 [ 21.0] 15NA/H: 13.0 [ 21.0]
10.5 [19.2] 10.5 [19.2]
15NA2/H2: 13.6 [ 21.6] 15NA2/H2: 13.6 [ 21.6]
HSPF IV 4 Heating 15NA/H: 10.0 — 10.0 —15NA2: 11.2
15NA2/H2: 10.8
COP Heating 1 3.30 — 3.33 —
Power supply V , phase , Hz 208/230 , 1 , 60
Max. fuse size (time delay) A 15
Min. circuit ampacity A 12 14
Fan motor F.L.A 0.50 0.93
Compressor
Model
MUZ/MUY-GE NA SNB130FQBH
MUZ/MUY-GE NA2
MUZ/MUY-GE NA
-
1
MUZ-GE NAH, NAH2
SNB130FQBHT
R.L.A 7.4 6.8 10.0
L.R.A 9.3 8.5 12.5
Refrigeration oil
(Model) L 0.45 (NEO22)
Refrigerant control Linear expansion valve
Sound level 1Cooling dB(A) 49 54
Heating dB(A) 51 — 56 —
Defrost method Reverse cycle
Dimensions W in. 31-1/2 33-1/16 D in. 11-1/4 13
H in. 21-5/8 33-7/16
Weight Ib. 80 119
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. 1/2 (0.0315)
Connection method 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
OBH549F

8
Outdoor unit model MUZ-GE24NA MUY-GE24NA
Capacity
Rated (Minimum~Maximum)
Cooling 1 Btu/h 22,500
(8,200 ~ 31,400) 22,500 (8,200 ~ 31,400)
Heating 47 1 Btu/h 27,600
(7,500 ~ 36,900) —
Capacity
Rated (Maximum) Heating 17 2 Btu/h 16,000 (24,600) —
Power consumption
Rated (Minimum~Maximum) Cooling 1W
1,800 (570 ~ 3,580) 1,800 (570 ~ 3,580)
Heating 47 1W
2,340 (520 ~ 3,650) —
Power consumption
Rated (Maximum) Heating 17 2 W 1,770 (3,290) —
EER 1
[SEER] 3 Cooling 12.5 [19.0]
HSPF IV 4 Heating 10.0 —
COP Heating 1 3.46 —
Power supply V , phase , Hz 208/230 , 1 , 60
Max. fuse size (time delay) A 20
Min. circuit ampacity A 17.1
Fan motor F.L.A 0.93
Compressor
Model SNB172FQKMT
R.L.A 12.9
L.R.A 16.1
Refrigeration oil
(Model) L 0.40 (FV50S)
Refrigerant control Linear expansion valve
Sound level 1Cooling dB(A) 55
Heating dB(A) 55 —
Defrost method Reverse cycle
Dimensions W in. 33-1/16 D in. 13
H in. 34-5/8
Weight Ib. 119
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. 3/8 (0.0315)
Gas in. 5/8 (0.0315)
Connection method Indoor Flared
Outdoor Flared
Between the indoor &
outdoor units Height difference ft. 50
Piping length ft. 100
Refrigerant charge (R410A) 4 lb. 3 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
OBH549F

9
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)
(MUZ)
"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
= ("Cooling 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
(MUZ)
Standard temperature 70 60 47 43
Maximum temperature 80 67 75 65
Minimum temperature 70 60 -4 -5
3-1. 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
OBH549F

10
Unit: inch
MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA
MUZ-GE09NA2 MUZ-GE12NA2 MUZ-GE15NA2
MUZ-GE09NAH MUZ-GE12NAH MUZ-GE15NAH
MUZ-GE09NAH2 MUZ-GE12NAH2 MUZ-GE15NAH2
MUY-GE09NA MUY-GE12NA MUY-GE15NA
MUY-GE09NA2 MUY-GE12NA2 MUY-GE15NA2
Liquid pipe :1/4 (flared)
Gas pipe :3/8 (flared) (GE09/12)
1/2 (flared) (GE15)
6-23/32
2
5-7/8
2-23/32
1-3/4
15-3/4
12 ~ 12-3/4
13-9/16
11/16
1-9/16
7/8
21-5/8
11-1/32
13/32
31-1/2
19-11/16
5-15/16
11-29/32
17/3229/32 11-1/4
Air in
handle
Air in
Air out
2- 3/8 13/16 Oval hole
Drain hole
ø 1-5/8 (GE09/12/15NA/NA2)
Drain hole
ø 1-5/16 (GE09/12/15NAH/NAH2)
REQUIRED SPACE
14 in. or more
8 in. or more *2
4 in. or more
4 in. or more
*1 4 in. 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
Clear *1
4OUTLINES AND DIMENSIONS
OBH549F

11
MUZ-GE18NA
MUZ-GE18NAH
MUY-GE18NA
20-9/32
14-3/16
Air in
11-25/32
2-19/32
Air in
Air out
19-11/16
33-1/16
13
2
4-25/32
33-7/16
16-15/16
3-3/16
4-3/8
× 13/16 slot
1-11/32
1-9/16
Drain 3 holes
ø1
-5/16
(GE18NA)
30°
35°
2-9/16
Liquid:1/4(flared)
Gas :1/2(flared)
3-9/16
8-11/32
4 in. or more
REQUIRED SPACE
14 in. or more
4 in. or more
*1 20 in. 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
Clear *1
20 in. or more *2
Drain hole
ø 1-5/16 (GE18NAH)
Unit: inch
OBH549F

12
16-7/16
1-9/16
1-5/8
Drain hole
6-7/8 19-11/16
13
2
Air in
Air out 2-holes 13/32 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) Ø3/8
Gas refrigerant pipe joint
Refrigerant pipe (flared) Ø5/8
14 in. or more
4 in. or more
REQUIRED SPACE
4 in. or more
20 in. or more *2
*1 20 in. 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
Clear *1
Unit: inch
MUZ-GE24NA
MUY-GE24NA
OBH549F

13
MUZ-GE09NA MUZ-GE12NA
5WIRING DIAGRAM
MUZ-GE09NA2 MUZ-GE12NA2
OBH549F

14
MUZ-GE09NAH MUZ-GE12NAH
MUZ-GE09NAH2 MUZ-GE12NAH2
OBH549F

15
MUY-GE09NA MUY-GE12NA
MUY-GE09NA2 MUY-GE12NA2
OBH549F

16
MUZ-GE15NA- 1
MUZ-GE15NA
OBH549F

17
MUZ-GE15NAH
MUZ-GE15NA2
OBH549F

18
MUY-GE15NA
MUZ-GE15NAH2
OBH549F

19
MUY-GE15NA- 1
MUY-GE15NA2
OBH549F

20
MUZ-GE18NA
MUZ-GE18NA- 1
OBH549F