Midea MTA-76CRN1 User manual

Air-cooled Package
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Air-cooled package
Middle Static Pressure Duct unit
High Static Pressure Duct unit
Service Manual 2013
MHB-76CRN1 / MOV-76CN1-C
MHB-96CRN1 / MOV-96CN1-C
MHB-76HRN1 / MOV-76HN1-C
MHB-96HRN1 / MOV-96HN1-C
DM13-01.01.16en
MTA-76CRN1 / MOV-76CN1-C
MTA-96CRN1 / MOV-96CN1-C
MTA-120CRN1 / MOV-120CN1-C
MTA-150CRN1 / 2* MOV-76CN1-C
MTA-76HRN1 / MOV-76HN1-C
MTA-96HRN1 / MOV-96HN1-C
MTA-120HRN1 / MOV-120HN1-C

DM13-01.01.16en Air-cooled Package
Service manual 1
Content
Part 1 General Information............................................2
Part 2 Indoor Units.........................................................6
Part 3 Outdoor Units....................................................44
Part 4 Installation.........................................................59
Part 5 Control ...............................................................92

Air-cooled Package DM13-01.01.16en
2 Service manual
Part 1 General Information
1. Model Names of Indoor/Outdoor Units............................. 3
2. External Appearance.......................................................... 4
3. Nomenclature...................................................................... 5

DM13-01.01.16en Air-cooled Package
Service manual 3
1. Model Names of Indoor/Outdoor Units
1.1 Model Names of Units with Cooling only:
Type Indoor unit Outdoor unit Capacity
Model Power
supply Model Power supply kW Btu/h
Mid-static
pressure duct
type
MTA-76CRN1
220~240V-1
Ph-50Hz
MOV-76CN1-C 380~415V-3
N-50Hz
22 76
MTA-96CRN1 MOV-96CN1-C 28 96
MTA-120CRN1 MOV-120CN1-C
380~400V-3
N-50Hz 35 120
MTA-150CRN1 MOV-76CN1-C *2
380~415V-3
N-50Hz
44 150
High-static
pressure
duct type
MHB-76CRN1 MOV-76CN1-C 22 76
MHB-96CRN1 MOV-96CN1-C 28 96
1.2 Model Names of Units with Cooling and heating:
Type Indoor unit Outdoor unit Capacity
Model Power
supply Model Power
supply kW Btu/h
Mid-static
pressure duct
type
MTA-76HRN1
220~240V-1
Ph-50Hz
MOV-76HN1-C 380~415V-3
N-50Hz
22 76
MTA-96HRN1 MOV-96HN1-C 28 96
MTA-120HRN1 MOV-120HN1-C
380~400V-3
N-50Hz 35 120
MTA-150HRN1 MOV-76HN1-C *2
380~415V-3
N-50Hz
44 150
High-static
pressure duct
type
MHB-76HRN1 MOV-76HN1-C 22 76
MHB-96HRN1 MOV-96HN1-C 28 96

Air-cooled Package DM13-01.01.16en
4 Service manual
2. External Appearance
2.1 Indoor Units
MTA-76C(H)RN1
MTA-96C(H)RN1 MTA-120CRN1＼MTA-120HRN1
MTA-150CRN1
2.2 Outdoor Unit
MOV-76C(H)N1-C
MOV-96C(H)N1-C
MOV-150C(H)N1-C (MOV-76C(H)N1-C*2) MOV-120C(H)N1-C

DM13-01.01.16en Air-cooled Package
Service manual 5
3. Nomenclature
3.1 Indoor unit:
3.2 Outdoor unit:
M T A–76 C R N1
None：R22；N1：R410a
R：Remote Controller
Function Code: C: Cooling
H: Cooling and Heating
Cooling Capacity (*76 kBtu/h)
Product Series
A: 1st time design
B: 2nd time design
Indoor Units
T: Duct type
H: High static pressure
Midea
Design times
None：R22；
N1：R410a
Function Code：
C: Cooling Only
H: Heat pump
Cooling Capacity (76 kBtu/h)
Universal Outdoor Unit
Outdoor Unit
Midea
M O V 76 C N1 - C

Air-cooled Package DM13-01.01.16en
6 Service manual
Part 2 Indoor Units
1. Features............................................................................... 7
2. Specifications ..................................................................... 8
3. Dimensions ....................................................................... 11
4. Service Space ................................................................... 12
5. Piping Diagrams ............................................................... 14
6. Wiring Diagrams............................................................... 14
7.Capacity Table.................................................................... 19
8. Static Pressure.................................................................. 33
9. Electric Characteristics.................................................... 35
10. Sound Levels .................................................................. 36
11. Troubleshooting.............................................................. 37

DM13-01.01.16en Air-cooled Package
Service manual 7
1. Features
1. Nested in the ceiling, space-saving and noble.
2. High capacity of cooling/heating, efficient, and energy-saving.
3. The air outlet is laid out according to you desire.
4. Economic and convenient installation
1) Several diffusers branch off from an indoor unit, adjusting the room temperature, which makes many
rooms to be air-conditioned with only one indoor unit.
2) All models feature thin design making them applicable to ceiling pocket that tends to be shallow
5. Way of air intake and inserting air filter
6. It is suitable be used for office, hospital, commercial place and home, the air conditioner will create the
comfortable and elegance environment for you.

Air-cooled Package DM13-01.01.16en
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2. Specifications
Model MTA-76CRN1 MTA-76HRN1 MTA-96CRN1 MTA-96HRN1
Power supply - 220~240V-1Ph-50Hz 220~240V-1Ph-50Hz
Temp. setting range ℃ ≥17 ≤30 ≥17 ≤30
Rated input power W 11700 11700 14400 14400
Rated current A 19.3 19.3 23.7 23.7
Cooling
Capacity
Btu/h 76000 76000 96000 96000
W22000 22000 28000 28000
Input W 7500 7500 9600 9600
EER W/W 2.93 2.93 2.92 2.92
Heating
Capacity
Btu/h / 78000 / 105000
W / 25000 / 31000
Input W / 8300 / 10300
COP W/W / 3.01 / 3.01
Indoor air flow m3/h 4250 4250 5100 5100
Indoor standard ESP Pa 100 100 100(98) 100(98)
Indoor noise level dB(A) 54 54 55 55
Refrigerant
Type - R410A R410A R410A R410A
Control - Capillary Capillary
Fan
Type - Centrifugal fan Centrifugal fan Centrifugal fan Centrifugal fan
Dimension mm Φ307 Φ307 Φ307 Φ307
Drive type/ Motor step - Direct/ Single Direct/ Single Direct/ Single Direct/ Single
Motor input* No. W 446*2 446*2 725*2 725*2
Motor speed rpm 877 877 1136 1136
Coil
Type - Copper tube and aluminum fin Copper tube and aluminum fin
Tube size mm Φ9.52 Φ9.52 Φ9.52 Φ9.52
No. of rows - 3 3 4 4
Fin per inch FPI 17 17 17 17
Length* height mm 1200*406.4 1200*406.4 1200*406 1200*406
Controller - Remote controller Remote controller
Drain pipe size mm 41 41 41 41
Dimension (W*H*D) mm 1350*760*450 1350*760*450 1350*760*450 1350*760*450
Packing (W*H*D) mm 1549*476*917 1549*476*917 1549*917*476 1549*917*476
Net/Gross weight kg 105/120 105/120 105/120 105/120
Shipping Qty.(20’/40’/40’HQ) pcs. 30/64/64 30/64/64 30/64/64 30/64/64
Notes:
1. ESP: external static pressure
2. Nominal cooling capacities are based on the following conditions:
Indoor temp: 27°CDB, 19°CWB; Outdoor temp: 35°CDB, 24°CWB; Equivalent refrigerant piping: 7.5m (horizontal).
3. Nominal heating capacities are based on the following conditions:
Indoor temp: 20°CDB, 15°CWB; Outdoor temp: 7°CDB, 6°CWB; Equivalent refrigerant piping: 7.5m (horizontal).

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Service manual 9
Model MTA-120CRN1 MTA-120HRN1 MTA-150CRN1 MTA-150CRN1
Power supply - 220~240V-1Ph-50Hz 220~240V-1Ph-50Hz
Temp. setting range ℃ ≥17 ≤30 ≥17 ≤30
Rated input power W 17300 17300 21200 21200
Rated current A 28.6 28.6 35 35
Cooling
Capacity
Btu/h 120000 120000 150000 150000
W35000 35000 44000 44000
Input W 12000 12000 15100 15100
EER W/W 2.92 2.92 2.91 2.91
Heating
Capacity
Btu/h / 120000 / 160000
W / 38000 / 47000
Input W / 12600 / 15700
COP W/W / 3.02 / 3
Indoor air flow m3/h 6375 6375 7650 7650
Indoor standard ESP Pa 150 150 150 150
Indoor noise level dB(A) 56 56 56 56
Refrigerant
Type - R410A R410A R410A R410A
Control - Capillary Capillary
Fan
Type - Centrifugal fan Centrifugal fan Centrifugal fan Centrifugal fan
Dimension mm Φ307 Φ307 Φ307 Φ307
Drive type/ Motor step - Direct/ Single Direct/ Single Direct/ Single Direct/ Single
Motor input * No. W 498*3 498*3 630*3 630*3
Motor speed rpm 860 860 1202 1202
Coil
Type - Copper tube and aluminum fin Copper tube and aluminum fin
Tube size mm Φ7 Φ7 Φ7 Φ7
No. of rows 4 4 4 4
Fin per inch FPI 17 17 17 17
Length* height mm 1602*588 1602*588 1602*588 1602*588
Controller - Remote controller Remote controller
Drain pipe size mm 41 41 41 41
Dimension (W*H*D) mm 1828*858*638 1828*858*638 1828*858*638 1828*858*638
Packing (W*H*D) mm 2095*929*689 2095*929*689 2095*929*689 2095*929*689
Net/Gross weight kg 188/220 188/220 188/200 188/200
Shipping Qty per (20'/40'/40'HD) pcs 19/42/46 19/42/46 19/42/46 19/42/46
Notes:
1. ESP: external static pressure
2. Nominal cooling capacities are based on the following conditions:
Indoor temp: 27°CDB, 19°CWB; Outdoor temp: 35°CDB, 24°CWB; Equivalent refrigerant piping: 7.5m (horizontal).
3. Nominal heating capacities are based on the following conditions:
Indoor temp: 20°CDB, 15°CWB; Outdoor temp: 7°CDB, 6°CWB; Equivalent refrigerant piping: 7.5m (horizontal).

Air-cooled Package DM13-01.01.16en
10 Service manual
Model MHB-76CRN1 MHB-76HRN1 MHB-96CRN1 MHB-96HRN1
Power supply - 220~240V-1Ph-50Hz 220~240V-1Ph-50Hz
Temp. setting range ℃ ≥17 ≤30 ≥17 ≤30
Rated input power W 11700 11700 14400 14400
Rated current A 19.3 19.3 23.7 23.7
Cooling
Capacity
Btu/h 76000 76000 96000 96000
W 22000 22000 28000 28000
Input power W 7500 7500 9600 9600
EER W/W 2.93 2.93 2.92 2.92
Heating
Capacity Btu/h / 78000 / 95500
w / 25000 / 31000
Input power W / 8300 / 10300
COP W/W / 3.01 / 3.01
Indoor air flow m3/h 4250 4250 5100 5100
Indoor standard ESP Pa 196 196 196 196
Indoor noise level dB(A) 58 58 60 60
Refrigerant Type - R410A R410A R410A R410A
Control - Capillary Capillary
Fan
Type - Centrifugal fan Centrifugal fan Centrifugal fan Centrifugal fan
Dimension mm Φ307 Φ307 Φ307 Φ307
Drive type/ Motor step - Direct/ Single Direct/ Single Direct/ Single Direct/ Single
Motor input* No. W 663*2 663*2 788*2 788*2
Motor speed rpm 1022/871/758 1022/871/758 1135/983/845 1135/983/845
Coil
Type - Copper tube and aluminum fin Copper tube and aluminum fin
Tube size mm Φ9.52 Φ9.52 Φ9.52 Φ9.52
No. of rows - 3 3 4 4
Fin per inch FPI 17 17 17 17
Length*Height mm 1200*406.4 1200*406.4 1200*406 1200*406
Controller - Remote controller Remote controller
Drain pipe size mm 41 41 41 41
Dimension (W*H*D) mm 1350*760*450 1350*760*450 1350*760*450 1350*760*450
Packing (W*H*D) mm 1549*476*917 1549*476*917 1549*917*476 1549*917*476
Net/Gross weight kg 105/120 105/120 105/120 105/120
Shipping Qty per (20'/40'/40'HD) pcs 30/64/64 30/64/64 30/64/64 30/64/64
Notes:
1. ESP: external static pressure
2. Nominal cooling capacities are based on the following conditions:
Indoor temp: 27°CDB, 19°CWB; Outdoor temp: 35°CDB, 24°CWB; Equivalent refrigerant piping: 7.5m (horizontal).
3. Nominal heating capacities are based on the following conditions:
Indoor temp: 20°CDB, 15°CWB; Outdoor temp: 7°CDB, 6°CWB; Equivalent refrigerant piping: 7.5m (horizontal).

DM13-01.01.16en Air-cooled Package
Service manual 11
3. Dimensions
3.1 Duct type units with two air outlets：
Air inlet side
C
A
B
D
W
F
H
E
Model A (mm) B (mm) C(mm) E(mm) F(mm) W (mm) H (mm) D (mm)
MTA-76CRN1 840 800 1180 300 165 1350 450 760
MTA-76HRN1
MTA-96CRN1 840 800 1180 300 165 1350 450 760
MTA-96HRN1
MHB-76CRN1 840 800 1180 300 165 1350 450 760
MHB-76HRN1
MHB-96CRN1 840 800 1180 300 165 1350 450 760
MTA-96HRN1

Air-cooled Package DM13-01.01.16en
12 Service manual
3.2 Duct type units with three air outlets：
Air inlet side
C
B
D
Model B (mm) C(mm) E(mm) F(mm) W (mm) H (mm) D (mm)
MTA-120CRN1 794.5 1895 330 180 1970 668 860
MTA-120HRN1
MTA-150CRN1 794.5 1895 330 180 1970 668 860

DM13-01.01.16en Air-cooled Package
Service manual 13
4. Service Space
Electric control box
Inspection hole
≥600mm≥500mm
Inspection hole
H
Topview Sideview
Inspection
Canvas adapter
Muffle
A
ir outlet Air inlet
Air filter
hole
Muffle
Air duct system

Air-cooled Package DM13-01.01.16en
14 Service manual
5. Refrigerant cycle diagram
5.1 Cooling only: MTA-76CRN1, MTA-96CRN1, MTA-120CR N1, MTA-150CR N1
MHB-76CRN1, MHB-96CRN1
Discharge temp. sensor
HP Switch
Compressor
Liquid-gas seperator
Outdoor heat-exchanger
Stop valve Stop valve
Indoor unit
Check valve
LP Switch
T4
T2
T3
Cooling
Indoor
heat-exchanger
5.2 Cooling and heating: MTA-76HRN1, MTA-96HRN1, MTA-120HRN1
MHB-76HRN1, MHB-96HRN1
Discharge temp. sensor
HP Switch
Compressor
4-way valve
Liquid-gas seperator
Outdoor heat-exchanger
Stop valve Stop valve
Indoor unit
Check valve
LP Switch
T4
T2
T3
Heating
Cooling
Indoor
heat-exchanger

DM13-01.01.16en Air-cooled Package
Service manual 15
6. Wiring Diagrams
6.1 MTA-76CRN1, MTA-96CRN1, MHB-76CRN1, MHB-96CRN1
INDOOR POWER
YELLOW
GREEN
BROWN BLUE
RED
BLUE
RED
WHITE
RED RED
WHITE
SLOW
HIGH
LOW
BLUE
TO OUTDOOR
BLACK
YELLOW
RED
WHITE
BLUE
Y/G
BLACK
RED
WHITE
BLUE
Y/G
MAINCONTROLBOARD
WHITE
(GRAY)
WHITE
(GRAY)
CN20 CN7 CN3 CN2 CN1
CN8
CN11 CN10 CN15
TO WIRE
CONTROLLER
RL1 RL2 RL3
BLUE
RED
BROWN
BROWN
BROWN
BROWN
BROWN
BROWN
YELLOW
BLACK
BLACK
RED
BLUE
YELLOW
Y/G
RED
WHITE
BLUE
BLUE
N-LINE
RED
BLACK
Item Name Item Name Item Name
CAP1-CAP2 Indoor fan cap CN1-3,CN7,CN8, CN10,
CN11,CN15,CN20 PCB sockets T4 Transformer
FAN1-FAN2 Indoor fan RT1 Room temp.
sensor RT2 Pipe temp.
sensor
XP1 Connector XS1 Connector XT1 7-way terminal
XT2,XT3 Mid terminal RL1,RL2,RL3 Relay - -

Air-cooled Package DM13-01.01.16en
16 Service manual
MTA-120CRN1, MTA-150CRN1
INDOOR POWER
BLACK
YELLOW
YELLOW
GREEN
BROWN
BLUE
RED
BLUE
RED
RED
WHITE
RED RED
WHITE
WHITE
(GRAY)
WHITE
SLOW
HIGH
LOW
BLUE BLUE
RED
TO OUTDOOR
Y/G
BLACK
YELLOW
RED
WHITE
BLUE
Y/G
BLACK
RED
WHITE
BLUE
Y/G
MAIN CONTROL BOARD
WHITE
(GRAY)
WHITE
(GRAY)
CN20 CN7 CN3 CN2 CN1
CN8
CN11 CN10 CN15
TO WIRE
CONTROLLER
RL1 RL2 RL3
BLUE
RED
BROWN
BROWN
BROWN
BROWN
BROWN
BROWN
BLUE
YELLOW
BLACK
BLACK
RED
RED
BLUE
BLUE
YELLOW
YELLOW
Y/G
WHITE
RED
BLACK
Item Name Item Name Item Name
CAP1-CAP3 Indoor fan cap CN1-3,CN7,CN8,
CN10,CN11,CN15,CN20 PCB sockets T4 Transformer
FAN1-FAN3 Indoor fan RT1 Room temp.
sensor RT2 Pipe temp.
sensor
XP1 Connector XS1 Connector XT1 7-way terminal
XT2,XT3 Mid terminal RL1,RL2,RL3 Relay - -

DM13-01.01.16en Air-cooled Package
Service manual 17
6.2 MTA-76HRN1, MTA-96HRN1, MHB-76HRN1, MHB-96HRN1
INDOOR POWER
YELLOW
GREEN
BROWN
BLUE
RED
BLUE
RED
WHITE
RED RED
WHITE
SLOW
HIGH
LOW
RED
TO OUTDOOR
BLACK
YELLOW
RED
WHITE
BLUE
Y/G
BLACK
RED
WHITE
BLUE
Y/G
MAINCONTROLBOARD
WHITE
(GRAY)
WHITE
(GRAY)
CN20 CN7 CN3 CN2 CN1
CN8
CN11 CN10 CN15
TO WIRE
CONTROLLER
RL1 RL2 RL3
BLUE
RED
BROWN
BROWN
BROWN
BROWN
BROWN
BROWN
YELLOW
BLACK
RED
BLUE
YELLOW
Y/G
WHITE
RED
BLUE
BLUE
BLUE
N-LINE
BLACK
BLACK
YELLOW
BLACK
Item Name Item Name Item Name
CAP1-CAP2 Indoor fan cap CN1-3,CN7,CN8,
CN10,CN11,CN15,CN20 PCB sockets T4 Transformer
FAN1-FAN2 Indoor fan RT1 Room temp.
sensor RT2 Pipe temp.
sensor
XP1 Connector XS1 Connector XT1 7-way terminal
XT2,XT3 Mid terminal RL1,RL2,RL3 Relay - -

Air-cooled Package DM13-01.01.16en
18 Service manual
MTA-120HRN1
INDOOR POWER
BLACK
YELLOW
YELLOW
GREEN
BROWN
BLUE
RED
BLUE
RED
RED
WHITE
RED RED
WHITE
WHITE
(GRAY)
WHITE
SLOW
HIGH
LOW
BLUE BLUE
RED
TO OUTDOOR
Y/G
BLACK
YELLOW
RED
WHITE
BLUE
Y/G
BLACK
RED
WHITE
BLUE
Y/G
MAINCONTROLBOARD
WHITE
(GRAY)
WHITE
(GRAY)
CN20 CN7 CN3 CN2 CN1
CN8
CN11 CN10 CN15
TO WIRE
CONTROLLER
RL1 RL2 RL3
BLUE
RED
BROWN
BROWN
BROWN
BROWN
BROWN
BROWN
BLUE
YELLOW
BLACK
BLACK
RED
RED
BLUE
BLUE
YELLOW
YELLOW
Y/G
WHITE
RED
BLACK
Item Name Item Name Item Name
CAP1-CAP3 Indoor fan cap CN1-3,CN7,CN8,
CN10,CN11,CN15,CN20 PCB sockets T4 Transformer
FAN1-FAN3 Indoor fan RT1 Room temp.
sensor RT2 Pipe temp.
sensor
XP1 Connector XS1 Connector XT1 7-way terminal
XT2,XT3 Mid terminal RL1,RL2,RL3 Relay - -

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19 Service manual
7. Capacity Table
7.1 Cooling:
7.1.1 MTA-76CRN1
Gross Cooling Capacity(kW)
Outdoor DB(°C) 29.40 35.00
Indoor WB (°C) 16.10 19.40 22.80 16.10 19.40 22.80
CFM DB(°C) TGC SHC PI TGC SHC PI TGC SHC PI TGC SHC PI TGC SHC PI TGC SHC PI
2000
23.9 19.5 15.2 6.56 21.9 12.4 6.76 23.3 5.4 6.89 18.7 15.3 6.99 20.8 11.7 7.22 22.0 5.1 7.36
26.7 20.2 17.4 6.58 22.4 14.5 6.78 23.8 10.3 6.91 19.1 17.4 7.01 21.2 13.7 7.24 22.5 9.7 7.38
29.4 20.9 19.0 6.60 22.8 18.7 6.80 24.3 14.4 6.93 19.5 18.7 7.03 21.6 17.7 7.26 22.9 13.6 7.40
32.2 21.6 21.2 6.61 23.3 21.2 6.81 24.7 18.2 6.94 19.9 19.5 7.05 22.0 20.0 7.28 23.4 17.2 7.42
2300
23.9 20.6 16.5 6.76 22.5 13.0 6.96 23.9 5.6 7.09 19.7 16.6 7.19 21.4 12.4 7.42 22.6 5.3 7.56
26.7 21.3 18.5 6.78 23.0 16.3 6.98 24.4 10.7 7.11 20.1 18.6 7.21 21.8 15.5 7.44 23.1 10.1 7.58
29.4 22.0 20.4 6.80 23.5 19.7 7.00 24.9 15.2 7.13 20.5 20.1 7.23 22.2 18.7 7.46 23.6 14.4 7.60
32.2 22.8 21.7 6.81 23.9 22.2 7.01 25.4 18.9 7.15 20.9 20.9 7.25 22.7 21.0 7.47 24.0 17.9 7.62
2500
23.9 21.1 18.3 7.00 23.0 14.4 7.33 24.4 6.3 7.33 20.2 18.5 7.43 21.9 13.7 7.48 23.1 6.0 7.80
26.7 21.8 20.8 7.02 23.5 18.1 7.22 24.9 11 .9 7.35 20.6 20.6 7.45 22.0 17.2 7.50 23.6 11.3 7.82
29.4 22.6 21.9 7.04 24.0 22.0 7.24 25.4 16.8 7.37 21.0 21.0 7.47 22.7 20.9 7.70 24.1 15.9 7.84
32.2 23.4 22.9 7.06 24.4 22.2 7.26 25.9 21.1 7.39 21.4 21.4 7.49 23.2 21.1 7.72 24.6 20.0 7.86
2800
23.9 21.5 19.1 7.31 23.5 14.1 7.51 24.9 6.1 7.64 21.0 18.6 7.74 22.4 13.4 7.97 23.6 5.8 8.11
26.7 22.3 21.4 7.33 24.0 17.6 7.53 25.4 11 .5 7.66 21.4 20.6 7.76 22.8 16.8 7.99 24.1 11. 0 8.13
29.4 23.1 22.4 7.35 24.5 21.3 7.55 25.9 16.4 7.68 21.8 21.8 7.78 23.3 20.2 8.01 24.6 15.6 8.15
32.2 23.9 23.4 7.37 25.0 24.0 7.57 26.4 20.5 7.70 22.3 22.3 7.80 23.7 22.8 8.03 25.1 19.4 8.17