Midea MRT-60HN2 User manual

Content
1. GENERAL INFORMATION .................................................................
1.1 MODEL NAMES OF BASE STATION AIR CONDITIONER........................................
1.2 EXTERNALAPPEARANCE.............................................................................
1.3 NOMENCLATURE........................................................................................
3. COMPACT TYPE BASE STATION AIR CONDITIONER...................
3.1 FEATURES ..............................................................................................
3.2 REFRIGERANT CIRCUIT .............................................................................
3.3 UNIT STRUCTURE.....................................................................................
3.4 SPECIFICATIONS......................................................................................
3.5 DIMENSION .............................................................................................
3.6 INDOOR UNIT CAPACITY CURVE ..................................................................
3.7 WIRING DIAGRAM.....................................................................................
3.8 INSTALLATION..........................................................................................
3.9 FIELD WIRING ..........................................................................................
3.10TRIAL RUN.............................................................................................
3.11 MAINTENANCE.......................................................................................
3.12TROUBLE SHOOTING ..............................................................................
3.13 FUNCTION.............................................................................................
3.14 OPERATION...........................................................................................
3.15ACCESSORIES .......................................................................................
Библиотека СОК 

1. General information
Midea Base Station Air Conditioners are designed for installation in telecommunications containers and
equipment rooms. Those sites are usually in the country side, on the top of mountains, maybe miles of
nowhere from cities. As the compressors are equipped at indoor units, units are protected against
environmental influences and vandalism. All units are designed for running 24 hours a day and 365 days
a year. There are two types of unit structures: split type and compact type, the cooling capacity range is
from 5.5kW to 13kW.
1.1 Model names of base station air conditioner
Type
Model
Power Supply
Remarks
Compact type
KCD-60L/S-JZ(E1)
380V~, 50Hz,3Ph
With free
cooling function
KCD-75L/S-JZ(E2)
380V~,
50Hz,3Ph
KCD-120L/S-JZ
380V~,
50Hz,3Ph
Type
Model
Power Supply
Remarks
Compact type
380V~, 50Hz,3Ph
With free
cooling function
380V~, 50Hz,3Ph
380V~, 50Hz,3Ph
Model names of base station air conditioner CE approved
MRT-60HN2
MRT-75HN2
MRT-120HN2

1.2 External appearance
Compact type

3. Compact Type Base Station Air Conditioner
3.1 Features
Compact designed, the whole air conditioner system is protected by room, making it much stable and
longer working life.
The unit designed for large air flow volume, can take the heat load out from base station rapidly and
effectively.
Power phase sequence fault tolerance function. If the zero line is properly connected, the controller
will automatically adjust the wiring to make sure the power wiring is working properly.
Operating range from -40°C to 45°C outside temperature.
At low outside temperature, cooling directly with outside air, to save energy.
Fresh air inlet is equipped with dual filter to prevent equipment in station from dust damage.
Auto restart after power failure, unit will restart with the previous operation and setting automatically
when the power resumes.
An air-conditioning system can be configured maximum 2 units by the controller. If an individual unit
drops out or the heat load rises, inactive standby units are switched in for support.
The operating times of all connected units are compared to ensure that each on is used to an equal
extent.
Serial interface RS485 for connection to the internet to remote monitoring and control.

3.2 Refrigerant circuit
Compressor: KCD-60L/S-JZ(E1), is equipped with rotary compressor.
KCD-75L/S-JZ(E2), KCD-120L/S-JZ,
are equipped with scroll compressor.
Condenser and Evaporator: Copper tube andAluminum fin type heat exchanger.
Capillary: Capillary subassembly.
Fan: Centrifugal fan
MRT-60HN2 MRT-75HN2, MRT-120HN2

3.3 Unit structure
Air distribution
Displayer
Controller
Return Air
Intake
Handler
Supply Air
Outlet
Drain-pipe
Cooling mode
Free cooling mode

3.4 Specifications
Market model
KCD-60L/S-JZ(E1)
KCD-75L/S-JZ(E2)
KCD-120L/S-JZ
Power input
V-Ph-Hz
380V~ 3Ph 50Hz
380V~ 3Ph 50Hz
380V~ 3Ph 50Hz
Cooling
Total capacity
W
6000
7500
12000
Sensible capacity
W
5700
6600
9120
Cooling input
W
1824
2580
4280
EER
3.29
2.90
2.80
Heating Capacity
W
3350
3500
3510
Max. power input
W
3450
3600
5900
Max. current
A
15.0
8.2
15.2
Refrigerant
Type
Charge
kg 2.8
3.25
4.08
Throttle device
Capillary
Capillary
Capillary
Air supply directions
Down front supply
Down front supply
Down front supply
Evaporator/Condenser
Copper tube and
Aluminum fin
Copper tube and
Aluminum fin
Copper tube and
Aluminum fin
Compressor
Type
Rotary
Scroll
Scroll
Model
SH307RV-C8LU
VR30KS-TFP-582
VR52KS-TFP-542
Brand
Hitachi
Copeland
Copeland
Capacity
Btu/h 17265
25000
43700
Input
W
1650
2230
3770
Rated current
A
7.75
4.1
6.8
Locked rotor amp
A
41
34
59
Up motor
Model
YDK120-8H
YDK120-8G
YDK120-8J
Input (×No.)
W
149 (×2)
203 (×2)
275 (×3)
Speed
rpm
445
575
650
Down motor
Model
YSK90-6H
YSK90-6F
YSK250-4E
Input (×No.)
W
148 (×1)
156 (×1)
430 (×1)
Speed
rpm
775
865
1080
Free cooling function
Yes
Yes
Yes
Air flow rate
m3/h
1550
1700
2300
Drainage pipe OD
mm
16.5
16.5
16.5
Weight (Net / Gross)
kg
205/220
205/220
270/285
Dimension
Body (W×H×D)
mm
1000×1900×600
1000×1900×600
1250×1900×600
Packing (W×H×D)
mm
1025×1930×675
1025×1930×675
1280×1930×675
Ambient temperature range
°C
-40～+45
-40～+45
-40～+45
Notes:
Cooling conditions: Indoor air 28°C DB/ 20°C WB, Outdoor air 35°C DB/ 26°C WB.
The sound pressure level refers to a distance of 1m from the outer surface of the unit.
MRT-75HN2MRT-60HN2 MRT-120HN2
Market model CE
R407C

3.5 Dimension
KCD-60L/S-JZ(E1) / KCD-75L/S-JZ(E2)
MRT-60HN2/MRT-75HN2MRT-60HN2/MRT-75HN2MRT-60HN2/MRT-75HN2MRT-60HN2/MRT-75HN2

KCD-120L/S-JZ
MRT-60HN2MRT-60HN2MRT-60HN2

3.6 Indoor unit capacity curve
KCD-60L/S-JZ(E1)
KCD-75L/S-JZ(E2)
MRT-60HN2MRT-60HN2MRT-60HN2
MRT-75HN2MRT-75HN2MRT-75HN2MRT-75HN2

KCD-120L/S-JZ
3.7 Wiring diagram
KCD-60L/S-JZ(E1)
MRT-120HN2MRT-120HN2MRT-120HN2MRT-120HN2
MRT-60HN2MRT-60HN2MRT-60HN2MRT-60HN2

KCD-75L/S-JZ(E2)
KCD-120L/S-JZ
MRT-75HN2MRT-75HN2MRT-75HN2MRT-75HN2
MRT-120HN2MRT-120HN2MRT-120HN2MRT-120HN2

3.8 Installation
Dorsal view: KCD-60L/S-JZ(E1), KCD-75L/S-JZ(E2)
MRT-75HN2MRT-60HN2 MRT-75HN2MRT-60HN2 MRT-75HN2MRT-60HN2 MRT-75HN2MRT-60HN2

Dorsal view: KCD-120L/S-JZ
Notes:
Outdoor side air outlet
Fresh air inlet
Sealing gaskets
Burglar mesh (User provides)
Location
Units should be installed away from the heat source and vapor source.
There is no any obstruction to block the air circulation.
The location should be able to support the unit weight, and will not increase the running
noise and vibration.
The location should be convenient to do the unit piping, wiring and draining condensing
water.
MRT-120HN2MRT-120HN2MRT-120HN2MRT-120HN2

Water drainage
When lengthening the drain pipe, please must do heat insulation for the flexible pipe
lengthened part of the indoor side.
Do not make the lengthened drain pipe loose.
No draining barriers in piping the drain pipes.
When the drain pipes connect to the outdoor, it should be wrapped around with heat
insulation material, and rolled on the surface by packing belts to avoid air come in and
cause condensation.
Laying the dram pipe should be downward slopping, do not make rising drainage.
Do not place the end of the drain pipe in the water.
3.9 Field wiring
The maximum allowed voltage fluctuation is ±10%.
Be sure unit is correctly earthing.
Be sure equipped electric leakage switch, main switch and fuse. The capacity of fuse should
be calculated as followed: the max. ampacity= (1.5~3)×the max. current of air conditioner +
total current of other electrical equipment. Cable introduction:
Air conditioner line
Main power line
Max. current
(A)
Wire cross-section
area (mm2)
Switch/ fuse
capacity (A)
Max. current
(A)
Wire cross-section
area (mm2)
Switch/ fuse
capacity (A)
≤10
1 or 1.5
16/16
≤16
1.5~4
32/25
≤16
1.5 or 2.5
32/25
≤25
2.5~4
63/50
≤25
2.5 or 4
63/50
≤32
4~10
63/50
≤32
4 or 6
63/50 ≤40
6~16
100/80
≤63
10~25
125/125

3.10 Trial run
After all the electric safety check and leakage check, it must power on to trial run the unit,
the operation time should not less than 30 minutes.
After power on, press the ‘Trial run’buttons in the control panel, then enter into the trial run
state.
Trial run test item:
Value judging type
Intuition judging type
Observation type
*Value display
*Temperature setting
*Air outlet temperature
*Air inlet temperature
*Room temperature change
*Protect switch action
*Abnormal noise
*Vibration situation
*Wind board swinging situation
*Air return temperature difference
*Room temperature difference
*Whether the liquid in the evaporator flows and
frosts.
After 30 minutes, the unit will automatically stop the trial run.
In the trial run state, press the ‘Trial run’button, or press the ‘ON/OFF’button, then can stop
the trial run.
3.11 Maintenance
Clean
Clean the unit shell, air outlet positions and grille with a piece of clean dry cloth. Neutral
detergent solution can be used.
Clean the air filters at least once a month (it is recommended once in two week). Remove
the filters, wash, dry in shady place, and then reinstall them.
Notice: Be sure cut off the power before cleaning.
Idle for a long time
If unit will not use for a long time, the following measurement should be taken:
Clean the unit shell and air filter.

Cut off the power, and turn off the breaker.
Check and clean the inside of unit regularly, this should be taken by the professional.
After idle for a long time
Check whether the air inlet and outlet positions are clean, if blocked, clean it out.
Check whether the earthing wire is in good condition and correct connected.
Clean the unit shell and air filter.
Check and make sure the drain-pipe can drain smoothly.
Turn on the switch.
3.12 Trouble shooting
Phenomenon
Reason
Solution method
The air conditioner cannot
operate.
Power off
Wait for the power recovery
Do not connect to the power switch.
Connect to he power switch.
The power switch fuse has been
broken.
Change the fuse.
There has air come out, but
the cooling/heating effect is
not good.
The temperature setting is not suitable.
Properly set the temperature.
The air filter has been blocked by dust.
Clean the filter.
The baffle is opened.
Close the baffle.
The air inlet or outlet has been
blocked.
Clean out the blocks
Compressor 3 minutes protection
Wait for a while.
Malfunction and protection codes
Malfunction code
Content
E1
Return air of indoor side temperature sensor (T1) failure.
E2
Evaporator temperature sensor (T2) failure.
E4
Return air of outdoor side temperature sensor (T4) failure.
E6
Lack of the unit phase.
E8
Humidity sensor failure.
P1
High pressure protection of compressor
P2
Low pressure protection of compressor
P3
High discharge temperature protection, compressor shutdown.
P4
Low temperature protection of evaporator, compressor shutdown.

E1, E2, E4
E6
E8

P1
P2

P3
P4