Midea MLCAC-UTSM-2010-10 User manual

MIDEA LCAC
50Hz R410A DC Inverter
Service Manual
2011

MLCAC-UTSM-2010-10 Contents
Contents i
Part 1 General Information ................................................................................................. 1
Part 2 Indoor Units .............................................................................................................. 6
Part 3 Outdoor Units ......................................................................................................... 67
Part 4 Installation .............................................................................................................. 96
Part 5 Control................................................................................................................... 107
※The specifications, designs, and information in this book are subject to change without notice for
product improvement.

MLCAC-UTSM-2010-10 General Information
General Information 1
Part 1
General Information
1. Model Names of Indoor/Outdoor Units...........................2
2. External Appearance ........................................................3
2.1 Indoor Units ................................................................................. 3
2.2 Outdoor Units .............................................................................. 3
3. Nomenclature....................................................................4
4. Features .............................................................................5

Model Names of Indoor/Outdoor Units MLCAC-UTSM-2010-10
2 General Information
Model Names of Indoor/Outdoor Units
1.1 Indoor Units
R410A (capacity multiplied by 1000Btu/h)
Type Function 36 48
Four-way cassette Cooling and heating √√
Duct Cooling and heating √√
Ceiling & floor Cooling and heating √√
1.2 Outdoor Units
Model of outdoor unit and corresponding indoor unit
Universal Outdoor unit Model Compressor type Compressor Brand Matched indoor units
MOUB-36HDN1-Q Rotary DC Inverter GUANGZHOU MITSUBISHI MTB-36HWDN1
MUB-36HRDN1
MCC-36HRDN1
MOUB-36HDN1-R Rotary DC Inverter GUANGZHOU MITSUBISHI
MOU-48HDN1 Rotary DC Inverter GUANGZHOU MITSUBISHI MTB-48HWDN1
MUB-48HRDN1
MCC-48HRDN1
MOUB-48HDN1-R Rotary DC Inverter GUANGZHOU MITSUBISHI

MLCAC-UTSM-2010-10 External Appearance
General Information 3
External Appearance
2.1 Indoor Units
Duct Ceiling & Floor
Four-way Cassette
2.2 Outdoor Units
MOUB-36HDN1-R
MOUB-36HDN1-Q,
MOU-48HDN1, MOUB-48HDN1-R

Nomenclature MLCAC-UTSM-2010-10
4 General Information
Nomenclature
1.1 Indoor Unit
M U B - 18 H R D N1
Refrigerant Type
N1 R410A
DC Inverter
Control Mode
R Remote Control
Function Code
C cooling Only
H cooling & Heating
Capacity (¡ Á1000Btu/h)
Product Series
A First Time Design BSecond Time Design
C Third Time Design
Product Category
C Cassette Type
T Duct Type
U Ceiling & Floor Type
H High Static Pressure Duct Type
Midea
3.2 Outdoor Unit
M O U D - 60 H D N1- R
Power Supply
R 380~415V, 3N, 50Hz
-- 220~240V, 1N, 50Hz
Refrigerant
N1 R410A
DC Inverter
Function Code
C cooling only Hcooling & heating
Capacity (¡ Á1000Btu/h)
Product Series
A Time A Designed BTime B Designed
C Time C Designed D Time D Designed
Universal Outdoor Unit
O Outdoor unit U Universal
Midea
FConsole Type

MLCAC-UTSM-2010-10 Features
General Information 5
Features
4.1 Universal outdoor unit design
Indoor unit with the same capacity can match with the same outdoor unit.
4.2 High efficiency and energy saving.
Thanks to the DC inverter technology and optimized piping system, the EER and COP of whole
series can easily reach A-class.
4.3 Low noise and low starting current.
Thanks to the DC inverter technology, the system can work with low noise, and very small starting
current.
4.4 Intelligent refrigerant adjustment technology.
Throttle part is made up of capillary and electronic expansion valve (EXV). The outdoor unit can
output the most accurate capacity in any condition.
4.5 Working in cooling mode under -15℃.
Outdoor unit built-in with low ambient kit, it can control the outdoor unit’s fan and cooling can be
performed throughout the year for computer rooms, banquet halls, etc. Wide operation range
covers outdoor temperatures as low as -15℃for cooling.
4.6 Indoor & outdoor unit’s power supply is separate.
4.7 All indoor units have network control function.
4.8 All indoor units have Auto-restart function.

Indoor Units MLCAC-UTSM-2010-06
6 Indoor Units
Part 2
Indoor Units
Four-way Cassette Type.......................................................7
Duct Type.............................................................................20
Ceiling & Floor Type ...........................................................31

MLCAC-UTSM-2010-10 Four-way Cassette Type
Four-way Cassette Type 7
Four-way Cassette Type
1. Features...........................................................................8
2. Dimensions....................................................................11
3. Service Space................................................................12
4. Wiring Diagrams ...........................................................13
5. Air Velocity and Temperature Distributions...............14
6. Electric Characteristics................................................15
7. Sound Levels ................................................................15
8. Accessories...................................................................16
9. The Specification of Power..........................................17
10. Field Wiring ...................................................................18

Features MLCAC-UTSM-2010-10
8 Four-way Cassette Type
1. Features
(1) Low operation noise
—Streamline plate ensures quietness
—Creates natural and comfortable environment
(2) Efficient cooling——Equal, fast and wide range cooling
(3) Excellent performance. The optimal evaporator & sufficient airflow volume guarantees the excellent
capacity
(4) The adoption of the most advanced 3- Dimensional Screw fan
—Reduces the air resistance passing through
—Smoothes the air flow
—Makes air speed distribution to the heat exchange uniform
(5) Fresh air makes life healthier and more comfortable.
(6) Drainage pump can take up the condenser water to 750mm.
(7) Ultra thin machine body to easy installation and maintenance. 18K~24K:230mm, 36~48K:300mm.

MLCAC-UTSM-2010-10 Features
Four-way Cassette Type 9
(8) Different color panels for choose: White、Gray、Blue、Black
(9) Swing angle of louver
1) Add one more swing motor, one motor driving two louvers. Controlling the interspace of each part,
minimizing the angle loss.
2) The swing angle of the first louver are 40~42 degrees and the second louver are 37~38 degrees.
New evaporator and inner configuration designed can acquire high heat-exchanger effect.
(10) More strengthening rib design around the panel, preventing the distortion for the panel.
(11) New outlet frame design to make the phenomena of coagulation great improvement: prevent the
condensing water from damaging the air guide strip.
(12) Adding rib on the panel of fan outlet, which can avoid the air outlet direct flow to people.
(13) 4 speeds available, optional super high fan speed design suitable for the large building over 3m high.
(14) Adding digital tube displaying on the display board. LED can display the Error Code to make the
malfunction checking easier.

Features MLCAC-UTSM-2010-10
10 Four-way Cassette Type
(15) Reserve spaces for air side-outlet, it is available to connect duct pipe hence air supplying from the four
sides to nearby small room..
(16) The connecting pipe and drop height is higher. Max. pipe length up to 50m（refer to ①）, and Max. drop
height up to 30m（refer to ②）.
(17) Optimal design, smaller Control Box, Space saving and convenient for wiring,
Using fire resistance galvanized steel for E-box material. Metal box make the control part more stable and
prevent damaging.
(18) 360°air flow panel : 360°air flow delivery ensures uniform airflow distribution(optional)

MLCAC-UTSM-2010-10 Dimensions
Four-way Cassette Type 11
2. Dimensions
Unit: mm
MODEL(Btu/h) A B C H
36000 300 Ф15.9 Ф9.5 >330
48000 300 Ф15.9 Ф9.5 >330

Service Space MLCAC-UTSM-2010-10
12 Four-way Cassette Type
3. Service Space

MLCAC-UTSM-2010-10 Wiring Diagrams
Four-way Cassette Type 13
4. Wiring Diagrams
MCC-36HRDN1、MCC-48HRDN1

Air Velocity and Temperature Distributions MLCAC-UTSM-2010-10
14 Four-way Cassette Type
5. Air Velocity and Temperature Distributions
Airflow velocity
Electronic
expansion valve
Oil separ ator
Compressor
Low pressure
switch
Oil return
Capillary
High pressure switch
Low pre ssure li quid
accumulator
Evaporator
Capillary
Outdoor unit Indoor unit
4-way valve
Condenser
T5
Discharge temp. sensor
Filter
Filter
Condenser temp. sensor
T3
T4
Ambient temp. sensor
Filter
Filter
T2
Evaporator temp. sensor
Roomtemp. sensor
T1

MLCAC-UTSM-2010-10 Electric Characteristics
Four-way Cassette Type 15
6. Electric Characteristics
Model Indoor Unit Power
Supply
Hz Voltage Min Max MFA
MCC-36HRDN1 50 220-240 198 254 15
MCC-48HRDN1 50 220-240 198 254 15
Remark:
MFA: Max. Fuse Amps. (A)
7. Sound Levels
Model Noise level dB(A)
H M L
MCC-36HRDN1 44 42 41
MCC-48HRDN1 44 42 41

Accessories MLCAC-UTSM-2010-10
16 Four-way Cassette Type
8. Accessories
INSTALLATION FITTINGS
Name Shape Quantity
Installation paper board 1
Tubing & Fittings Soundproof / insulation sheath
2
Connecting pipe group 1
Drainpipe Fittings
Out-let pipe sheath
1
Out-let pipe clasp 1
Drain joint 1
Seal ring 1
Remote controller & Its
Frame
Remote controller & Its Frame 1
Remote controller holder 1
Mounting screw(ST2.9×10-C-H) 2
Alkaline dry batteries (AM4) 2
Others Owner's manual 1
Installation manual 1
Installation accessory
(The product you have
might not be provided the
following accessories
Expansible hook 4
Installation hook 4
Orifice 1