Mitsubishi Electric MXZ-3C24NA User manual

CONTENTS
1. TECHNICAL CHANGES ··································· 2
2. PART NAMES AND FUNCTIONS····················· 3
3. SPECIFICATION················································ 4
4. NOISE CRITERIA CURVES·····························11
5. OUTLINES AND DIMENSIONS ······················ 13
6. WIRING DIAGRAM·········································· 18
7. REFRIGERANT SYSTEM DIAGRAM············· 23
8. DATA································································ 34
9. ACTUATOR CONTROL··································· 56
10. SERVICE FUNCTIONS···································· 57
11. TROUBLESHOOTING····································· 59
12. DISASSEMBLY INSTRUCTIONS···················· 77
INDOOR UNITS COMBINATION TABLES
HFC
utilized
R410A
TM
PARTS CATALOG (OBB702)
MXZ-3C24NA
MXZ-3C30NA
MXZ-4C36NA
INDOOR UNIT
SERVICE MANUAL
OUTDOOR UNIT
Models
MXZ-3C24NA
MXZ-3C30NA
MXZ-4C36NA
MXZ-5C42NA
MXZ-2C20NAHZ
MXZ-3C24NAHZ
MXZ-3C30NAHZ
No. OBH702
REVISED EDITION-A
Please void OBH702.
Revision A:
• MXZ-3C24NA, MXZ-3C30NA and MXZ-
4C36NA have been added.
Indoor unit service manual
MSZ-FE·NA Series (OBH542)
MSZ-GE·NA Series (OBH548)
MFZ-KA·NA Series (OBH568)
SEZ-KD·NA Series
PLA-A·BA Series (OCH420)
PCA-A·KA Series (OCH455)
PEAD-A·AA Series
SLZ-KA·NA Series (OCH487)
MSZ-FH·NA Series (OBH683)
MVZ-A·AA Series

TECHNICAL CHANGES
2
1
MXZ-5C42NA
MXZ-2C20NAHZ
MXZ-3C24NAHZ
MXZ-3C30NAHZ
1. New model
MXZ-3C24NA
MXZ-3C30NA
MXZ-4C36NA
1. New model
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:
• MXZ-3C24NA, MXZ-3C30NA and MXZ-4C36NA have been added.
OBH702A

3
PART NAMES AND FUNCTIONS
2
MXZ-5C42NA
MXZ-2C20NAHZ
MXZ-3C24NAHZ
MXZ-3C30NAHZ
MXZ-3C24NA
MXZ-3C30NA
MXZ-4C36NA
Air outlet
Drain outlet
Air inlet
(Back and side)
Air outlet
Drain outlet
Air inlet
(Back and side)
OBH702A

4
Cooling
Heating
Mode
*1: "A" Cooling steady state at rated compressor speed
"B-2" Cooling steady state at rated compressor speed
"B-1" Cooling steady state at minimum compressor speed
Low ambient cooling steady state at minimum compressor speed
Intermediate cooling steady state at intermediate compressor speed
*1: Standard rating-heating at rated compressor speed
*2: Low temperature heating at maximum compressor speed
Maximum temperature heating at minimum compressor speed
High temperature heating at minimum compressor speed
Frost accumulation at rated compressor speed
Frost accumulation at intermediate compressor speed
Test Indoor air condition Outdoor air condition
Dry bulb Wet bulb Dry bulb Wet bulb
80
80
80
80
80
70
70
70
70
70
70
67
67
67
67
67
60
60
60
60
60
60
95
82
82
67
87
47
17
62
47
35
35
(75)
(65)
(65)
(53.5)
(69)
43
15
56.5
43
33
33
Unit: °F
NOTE : Test conditions are based on ARI 210/240.
SPECIFICATION
3
Item Outdoor model MXZ-3C24NA
Indoor type Non-Duct (06+09+09 ) Duct ( 09+09+09)
Capacity
Cooling *1 Btu/h 22,000 23,600
Heating 47 *1 Btu/h 25,000 24,600
Heating 17 *2 Btu/h 19,600 19,600
Power
consumption
Cooling *1 W 1,620 2,100
Heating 47 *1 W 1,750 1,900
Heating 17 *2 W 2,120 2,230
EER Cooling 13.6 11.2
SEER Cooling 20.0 16.0
HSPF IV(V) Heating 9.8 9.2
COP Heating 4.20 3.80
External finish Munsell 3.0Y 7.8/1.1
Power supply V, phase, Hz 208/230, 1, 60
Max. fuse size (time delay) A 25
Min. circuit ampacity A 22.1
Fan motor F.L.A 1.9
Compressor
Model SNB220FQGMC
Winding resistance
(at 68 ºF) ΩU-V 0.95 V-W 0.95 W-U 0.95
R.L.A 12
L.R.A 13.7
Refrigerant control LEV
Sound level dB(A) 51/55
Defrost method Reverse cycle
Dimensions
W in. 37-13/32
D in. 13
H in. 31-11/32
Weight lb. 135
Remote controller Wireless type
Control voltage (by built-in transformer) 4
Refrigerant piping Not supplied (optional parts)
Valve size Liquid in. 1/4
Gas in. A:1/2 B,C:3/8
Connection method
Indoor Flared
Outdoor Flared
Refrigerant charge (R410A) lb. 6lb. 13oz.
Refrigeration oil (Model) oz. 24.7 (FV50S)
OBH702A

5
Cooling
Heating
Mode
*1: "A" Cooling steady state at rated compressor speed
"B-2" Cooling steady state at rated compressor speed
"B-1" Cooling steady state at minimum compressor speed
Low ambient cooling steady state at minimum compressor speed
Intermediate cooling steady state at intermediate compressor speed
*1: Standard rating-heating at rated compressor speed
*2: Low temperature heating at maximum compressor speed
Maximum temperature heating at minimum compressor speed
High temperature heating at minimum compressor speed
Frost accumulation at rated compressor speed
Frost accumulation at intermediate compressor speed
Test Indoor air condition Outdoor air condition
Dry bulb Wet bulb Dry bulb Wet bulb
80
80
80
80
80
70
70
70
70
70
70
67
67
67
67
67
60
60
60
60
60
60
95
82
82
67
87
47
17
62
47
35
35
(75)
(65)
(65)
(53.5)
(69)
43
15
56.5
43
33
33
Unit: °F
NOTE : Test conditions are based on ARI 210/240.
Item Outdoor model MXZ-3C30NA
Indoor type Non-Duct (09+09+12 ) Duct ( 09+09+12)
Capacity
Cooling *1 Btu/h 28,400 27,400
Heating 47 *1 Btu/h 28,600 27,600
Heating 17 *2 Btu/h 21,000 21,000
Power
consumption
Cooling *1 W 2,680 2,860
Heating 47 *1 W 2,150 2,220
Heating 17 *2 W 2,120 2,140
EER Cooling 10.6 9.6
SEER Cooling 19.0 16.2
HSPF IV(V) Heating 10.6 10.6
COP Heating 3.90 3.64
External finish Munsell 3.0Y 7.8/1.1
Power supply V, phase, Hz 208/230, 1, 60
Max. fuse size (time delay) A 25
Min. circuit ampacity A 22.1
Fan motor F.L.A 1.9
Compressor
Model SNB220FQGMC
Winding resistance
(at 68 ºF) ΩU-V 0.95 V-W 0.95 W-U 0.95
R.L.A 12
L.R.A 13.7
Refrigerant control LEV
Sound level dB(A) 52/56
Defrost method Reverse cycle
Dimensions
W in. 37-13/32
D in. 13
H in. 31-11/32
Weight lb. 135
Remote controller Wireless type
Control voltage (by built-in transformer) 4
Refrigerant piping Not supplied (optional parts)
Valve size Liquid in. 1/4
Gas in. A:1/2 B,C:3/8
Connection method
Indoor Flared
Outdoor Flared
Refrigerant charge (R410A) lb. 6lb. 13oz.
Refrigeration oil (Model) oz. 24.7 (FV50S)
OBH702A

6
Cooling
Heating
Mode
*1: "A" Cooling steady state at rated compressor speed
"B-2" Cooling steady state at rated compressor speed
"B-1" Cooling steady state at minimum compressor speed
Low ambient cooling steady state at minimum compressor speed
Intermediate cooling steady state at intermediate compressor speed
*1: Standard rating-heating at rated compressor speed
*2: Low temperature heating at maximum compressor speed
Maximum temperature heating at minimum compressor speed
High temperature heating at minimum compressor speed
Frost accumulation at rated compressor speed
Frost accumulation at intermediate compressor speed
Test Indoor air condition Outdoor air condition
Dry bulb Wet bulb Dry bulb Wet bulb
80
80
80
80
80
70
70
70
70
70
70
67
67
67
67
67
60
60
60
60
60
60
95
82
82
67
87
47
17
62
47
35
35
(75)
(65)
(65)
(53.5)
(69)
43
15
56.5
43
33
33
Unit: °F
NOTE : Test conditions are based on ARI 210/240.
Item Outdoor model MXZ-4C36NA
Indoor type Non-Duct (09+09+09+09 ) Duct ( 09+09+09+09)
Capacity
Cooling *1 Btu/h 35,400 34,400
Heating 47 *1 Btu/h 36,000 34,400
Heating 17 *2 Btu/h 26,600 26,600
Power
consumption
Cooling *1 W 3,760 3,940
Heating 47 *1 W 3,020 3,100
Heating 17 *2 W 3,340 3,450
EER Cooling 9.4 8.7
SEER Cooling 19.2 16.0
HSPF IV(V) Heating 11.0 9.8
COP Heating 3.50 3.25
External finish Munsell 3.0Y 7.8/1.1
Power supply V, phase, Hz 208/230, 1, 60
Max. fuse size (time delay) A 25
Min. circuit ampacity A 22.1
Fan motor F.L.A 1.9
Compressor
Model SNB220FQGMC
Winding resistance
(at 68 ºF) ΩU-V 0.95 V-W 0.95 W-U 0.95
R.L.A 12
L.R.A 13.7
Refrigerant control LEV
Sound level dB(A) 54/56
Defrost method Reverse cycle
Dimensions
W in. 37-13/32
D in. 13
H in. 31-11/32
Weight lb. 137
Remote controller Wireless type
Control voltage (by built-in transformer) 4
Refrigerant piping Not supplied (optional parts)
Valve size Liquid in. 1/4
Gas in. A:1/2 B,C,D:3/8
Connection method
Indoor Flared
Outdoor Flared
Refrigerant charge (R410A) lb. 6lb. 13oz.
Refrigeration oil (Model) oz. 24.7 (FV50S)
OBH702A

7
Cooling
Heating
Mode
*1: "A" Cooling steady state at rated compressor speed
"B-2" Cooling steady state at rated compressor speed
"B-1" Cooling steady state at minimum compressor speed
Low ambient cooling steady state at minimum compressor speed
Intermediate cooling steady state at intermediate compressor speed
*1: Standard rating-heating at rated compressor speed
*2: Low temperature heating at maximum compressor speed
Maximum temperature heating at minimum compressor speed
High temperature heating at minimum compressor speed
Frost accumulation at rated compressor speed
Frost accumulation at intermediate compressor speed
Test Indoor air condition Outdoor air condition
Dry bulb Wet bulb Dry bulb Wet bulb
80
80
80
80
80
70
70
70
70
70
70
67
67
67
67
67
60
60
60
60
60
60
95
82
82
67
87
47
17
62
47
35
35
(75)
(65)
(65)
(53.5)
(69)
43
15
56.5
43
33
33
Unit: °F
NOTE : Test conditions are based on ARI 210/240.
Item Outdoor model MXZ-5C42NA
Indoor type Non-Duct (06+09+09+09+09) Duct (09+09+09+09+09)
Capacity
Cooling *1 Btu/h 40,500 37,500
Heating 47 *1 Btu/h 45,000 41,000
Heating 17 *2 Btu/h 24,400 23,000
Power
consumption
Cooling *1 W 4,403 4,112
Heating 47 *1 W 3,575 3,463
Heating 17 *2 W 2,943 2,869
EER Cooling 9.2 9.0
SEER Cooling 19.7 15.2
HSPF IV(V) Heating 10.3 9.1
COP Heating 3.69 3.47
External finish Munsell 3.0Y 7.8/1.1
Power supply V, phase, Hz 208/230, 1, 60
Max. fuse size (time delay) A 40
Min. circuit ampacity A 31.9
Fan motor F.L.A 1.9
Compressor
Model MNB33FBTMC-L
Winding resistance
(at 68 ºF) ΩU-V 0.30 V-W 0.30 W-U 0.30
R.L.A 20
L.R.A 28.8
Refrigerant control LEV
Sound level dB(A) 56/58
Defrost method Reverse cycle
Dimensions
W in. 37-13/32
D in. 13
H in. 41-17/64
Weight lb. 189
Remote controller Wireless type
Control voltage (by built-in transformer) 4
Refrigerant piping Not supplied (optional parts)
Valve size Liquid in. 1/4
Gas in. A:1/2 B,C,D,E: 3/8
Connection method
Indoor Flared
Outdoor Flared
Refrigerant charge (R410A) lb. 8 lb. 13 oz.
Refrigeration oil (Model) oz. 37.4 (FV50S)
OBH702A

8
Cooling
Heating
Mode
*1: "A" Cooling steady state at rated compressor speed
"B-2" Cooling steady state at rated compressor speed
"B-1" Cooling steady state at minimum compressor speed
Low ambient cooling steady state at minimum compressor speed
Intermediate cooling steady state at intermediate compressor speed
*1: Standard rating-heating at rated compressor speed
*2: Low temperature heating at maximum compressor speed
Maximum temperature heating at minimum compressor speed
High temperature heating at minimum compressor speed
Frost accumulation at rated compressor speed
Frost accumulation at intermediate compressor speed
Test Indoor air condition Outdoor air condition
Dry bulb Wet bulb Dry bulb Wet bulb
80
80
80
80
80
70
70
70
70
70
70
67
67
67
67
67
60
60
60
60
60
60
95
82
82
67
87
47
17
62
47
35
35
(75)
(65)
(65)
(53.5)
(69)
43
15
56.5
43
33
33
Unit: °F
NOTE : Test conditions are based on ARI 210/240.
Item Outdoor model MXZ-2C20NAHZ
Indoor type Non-Duct (09+09) Duct (09+12)
Capacity
Cooling *1 Btu/h 18,000 20,000
Heating 47 *1 Btu/h 22,000 22,000
Heating 17 *2 Btu/h 13,700 13,700
Power
consumption
Cooling *1 W 1,334 1,819
Heating 47 *1 W 1,612 1,748
Heating 17 *2 W 1,450 1,588
EER Cooling 13.5 11.0
SEER Cooling 17.0 15.0
HSPF IV(V) Heating 9.8 9.5
COP Heating 4.00 3.69
External finish Munsell 3.0Y 7.8/1.1
Power supply V, phase, Hz 208/230, 1, 60
Max. fuse size (time delay) A 40
Min. circuit ampacity A 28.9
Fan motor F.L.A 1.9
Compressor
Model MNB33FBTMC-L
Winding resistance
(at 68 ºF) ΩU-V 0.30 V-W 0.30 W-U 0.30
R.L.A 20
L.R.A 28.8
Refrigerant control LEV
Sound level dB(A) 54/58
Defrost method Reverse cycle
Dimensions
W in. 37-13/32
D in. 13
H in. 41-17/64
Weight lb. 187
Remote controller Wireless type
Control voltage (by built-in transformer) 4
Refrigerant piping Not supplied (optional parts)
Valve size Liquid in. 1/4
Gas in. A,B: 3/8
Connection method
Indoor Flared
Outdoor Flared
Refrigerant charge (R410A) lb. 8 lb. 13 oz.
Refrigeration oil (Model) oz. 37.4 (FV50S)
OBH702A

9
Cooling
Heating
Mode
*1: "A" Cooling steady state at rated compressor speed
"B-2" Cooling steady state at rated compressor speed
"B-1" Cooling steady state at minimum compressor speed
Low ambient cooling steady state at minimum compressor speed
Intermediate cooling steady state at intermediate compressor speed
*1: Standard rating-heating at rated compressor speed
*2: Low temperature heating at maximum compressor speed
Maximum temperature heating at minimum compressor speed
High temperature heating at minimum compressor speed
Frost accumulation at rated compressor speed
Frost accumulation at intermediate compressor speed
Test Indoor air condition Outdoor air condition
Dry bulb Wet bulb Dry bulb Wet bulb
80
80
80
80
80
70
70
70
70
70
70
67
67
67
67
67
60
60
60
60
60
60
95
82
82
67
87
47
17
62
47
35
35
(75)
(65)
(65)
(53.5)
(69)
43
15
56.5
43
33
33
Unit: °F
NOTE : Test conditions are based on ARI 210/240.
Item Outdoor model MXZ-3C24NAHZ
Indoor type Non-Duct (06+06+09) Duct (09+09+09)
Capacity
Cooling *1 Btu/h 22,000 23,600
Heating 47 *1 Btu/h 25,000 24,600
Heating 17 *2 Btu/h 14,000 14,000
Power
consumption
Cooling *1 W 1,630 2,360
Heating 47 *1 W 1,725 1,871
Heating 17 *2 W 1,622 1,635
EER Cooling 13.5 10.0
SEER Cooling 19.0 15.5
HSPF IV(V) Heating 10.0 9.0
COP Heating 4.25 3.80
External finish Munsell 3.0Y 7.8/1.1
Power supply V, phase, Hz 208/230, 1, 60
Max. fuse size (time delay) A 40
Min. circuit ampacity A 29.9
Fan motor F.L.A 1.9
Compressor
Model MNB33FBTMC-L
Winding resistance
(at 68 ºF) ΩU-V 0.30 V-W 0.30 W-U 0.30
R.L.A 20
L.R.A 28.8
Refrigerant control LEV
Sound level dB(A) 54/58
Defrost method Reverse cycle
Dimensions
W in. 37-13/32
D in. 13
H in. 41-17/64
Weight lb. 189
Remote controller Wireless type
Control voltage (by built-in transformer) 4
Refrigerant piping Not supplied (optional parts)
Valve size Liquid in. 1/4
Gas in. A: 1/2 B,C: 3/8
Connection method
Indoor Flared
Outdoor Flared
Refrigerant charge (R410A) lb. 8 lb. 13 oz.
Refrigeration oil (Model) oz. 37.4 (FV50S)
OBH702A

10
Cooling
Heating
Mode
*1: "A" Cooling steady state at rated compressor speed
"B-2" Cooling steady state at rated compressor speed
"B-1" Cooling steady state at minimum compressor speed
Low ambient cooling steady state at minimum compressor speed
Intermediate cooling steady state at intermediate compressor speed
*1: Standard rating-heating at rated compressor speed
*2: Low temperature heating at maximum compressor speed
Maximum temperature heating at minimum compressor speed
High temperature heating at minimum compressor speed
Frost accumulation at rated compressor speed
Frost accumulation at intermediate compressor speed
Test Indoor air condition Outdoor air condition
Dry bulb Wet bulb Dry bulb Wet bulb
80
80
80
80
80
70
70
70
70
70
70
67
67
67
67
67
60
60
60
60
60
60
95
82
82
67
87
47
17
62
47
35
35
(75)
(65)
(65)
(53.5)
(69)
43
15
56.5
43
33
33
Unit: °F
NOTE : Test conditions are based on ARI 210/240.
Item Outdoor model MXZ-3C30NAHZ
Indoor type Non-Duct (09+09+12) Duct (09+09+12)
Capacity
Cooling *1 Btu/h 28,400 27,400
Heating 47 *1 Btu/h 28,600 27,600
Heating 17 *2 Btu/h 18,000 17,000
Power
consumption
Cooling *1 W 2,272 2,661
Heating 47 *1 W 2,096 2,187
Heating 17 *2 W 1,991 1,993
EER Cooling 12.5 10.3
SEER Cooling 18.0 16.0
HSPF IV(V) Heating 11.0 9.8
COP Heating 4.00 3.70
External finish Munsell 3.0Y 7.8/1.1
Power supply V, phase, Hz 208/230, 1, 60
Max. fuse size (time delay) A 40
Min. circuit ampacity A 29.9
Fan motor F.L.A 1.9
Compressor
Model MNB33FBTMC-L
Winding resistance
(at 68 ºF) ΩU-V 0.30 V-W 0.30 W-U 0.30
R.L.A 20
L.R.A 28.8
Refrigerant control LEV
Sound level dB(A) 54/58
Defrost method Reverse cycle
Dimensions
W in. 37-13/32
D in. 13
H in. 41-17/64
Weight lb. 189
Remote controller Wireless type
Control voltage (by built-in transformer) 4
Refrigerant piping Not supplied (optional parts)
Valve size Liquid in. 1/4
Gas in. A: 1/2 B,C: 3/8
Connection method
Indoor Flared
Outdoor Flared
Refrigerant charge (R410A) lb. 8 lb. 13 oz.
Refrigeration oil (Model) oz. 37.4 (FV50S)
OBH702A