Table of Contents
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1. Precaution ..................................................................................................................................................... 1
1.1 Safety Precaution .......................................................................................................................... 1
1.2 Warning .......................................................................................................................................... 1
2. Part Names and Features ............................................................................................................................ 4
2.1 Model Names of Indoor/Outdoor units .......................................................................................... 4
2.2 Part names of Indoor/Outdoor units .............................................................................................. 5
2.3 Features ......................................................................................................................................... 9
3. Dimension ................................................................................................................................................... 18
3.1 Indoor Unit ................................................................................................................................... 18
3.2 Outdoor Unit ................................................................................................................................ 23
4. Service Space ............................................................................................................................................. 25
4.1 Indoor Unit ................................................................................................................................... 25
4.2 Outdoor Unit ................................................................................................................................ 27
5. Refrigerant Cycle Diagram ........................................................................................................................ 28
6. Wiring Diagram ........................................................................................................................................... 29
6.1 Indoor Unit ................................................................................................................................... 29
6.2 Outdoor Unit ................................................................................................................................ 34
7. Fan Curves .................................................................................................................................................. 41
8 Electric Characteristics .............................................................................................................................. 48
9 Sound Level ................................................................................................................................................. 49
9.1 Indoor unit .................................................................................................................................... 49
9.2 Outdoor unit ................................................................................................................................. 52
10 Accessories ............................................................................................................................................... 53
11 The Specification of Power ...................................................................................................................... 55
12 Installation Details .................................................................................................................................... 57
12.1 Location selection ................................................................................................................... 57
12.2 Indoor unit installation ............................................................................................................. 57
12.3 Outdoor unit installation .......................................................................................................... 64
12.4 Refrigerant pipe installation .................................................................................................... 65
12.5 Drainage pipe installation ....................................................................................................... 69
12.6 Vacuum Drying and Leakage Checking ................................................................................. 72
12.7 Additional refrigerant charge .................................................................................................. 73
12.8 Engineering of insulation ........................................................................................................ 74
12.9 Engineering of electrical wiring ............................................................................................... 75
12.10
Test operation ...................................................................................................................... 75
13. Operation Characteristics ....................................................................................................................... 77
14. Electronic Function .................................................................................................................................. 78
14.1 Abbreviation ............................................................................................................................... 78
CONTENTS
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Summary of Contents for Midea MEHSU-09CHD2
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Page 1: Table Of Contents
CONTENTS 1. Precaution ..............................1 1.1 Safety Precaution .......................... 1 1.2 Warning ............................1 2. Part Names and Features ..........................4 2.1 Model Names of Indoor/Outdoor units ..................4 2.2 Part names of Indoor/Outdoor units ....................5 2.3 Features ............................9 3. - Page 2 14.2 Display function ......................... 78 14.3 Main Protection .......................... 78 14.4 Operation Modes and Functions ....................79 16. Troubleshooting ............................85 16.1 Indoor Unit Error Display ......................86 16.2 Outdoor unit error display ......................87 For 9K-24K outdoor unit: ........................87 For 36K-48K Outdoor Unit .........................
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Page 3: Precaution
Be caution when unpacking and installing the product. 1. Precaution Sharp edges could cause injury, be especially careful of the case edges and the fins on the 1.1 Safety Precaution condenser and evaporator. For installation, always contact the ... - Page 4 If strange sounds or smoke comes Install the drain hose to ensure that from product, turn the breaker off or water is drained away properly. disconnect the power supply cable. A bad connection may cause water leakage. There is risk of electric shock or fire. ...
- Page 5 Do not insert hands or other objects through air inlet or outlet while the product is operated. Do not drink the water drained from the product. Use a firm stool or ladder when cleaning or maintaining the product. Be careful and avoid personal injury.
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Page 6: Part Names And Features
2. Part Names and Features 2.1 Model Names of Indoor/Outdoor units Outdoor units Series Capacity Indoor units Cassette MEHSU-09CHC2 MCHSU-09PHH2 Duct MEHSU-09CHD2 Console MEHSU-09CHN2 Cassette MEHSU-12CHC2 MCHSU-12PHH2 Duct MEHSU-12CHD2 Console MEHSU-12CHN2 Cassette MEHSU-18CHC2 MCHSU-18PHH2 Duct MEHSU-18CHD2 Floor Ceiling MEHSU-18CHF2 Cassette... -
Page 7: Part Names Of Indoor/Outdoor Units
2.2 Part names of Indoor/Outdoor units Cassette Unit... - Page 8 Duct Units...
- Page 9 Console...
- Page 10 Ceiling-floor Units...
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Page 11: Features
2.3 Features 2.3.1 Duct Units 2.3.1.1 Installation Accessories: (Optional) Front Board, Canvas Air Passage, Filter, Panel, for easy installation Panel 2.3.1.2 Easy Installation: Two air Inlet Styles (Bottom side or Rear side) Air inlet from rear is standard for all capacity; air inlet from bottom is optional. ... - Page 12 2.3.1.4 Easy Maintenance Clean the filter (Optional, standard product without filter) It is easy to draw out the filter from the indoor unit for cleaning, even the filter is installed in rear side or bottom side. Replace the motor or centrifugal fan Remove the ventilated panel firstly.
- Page 13 2.3.1.7 Built-in Display Board The standard indoor unit can be controlled by wired controller. There is a display board with a receiver in the E-box. Move out the display, and fix it in other place, even in the distance of 2m(6.56ft). The unit will realized remoter control. ...
- Page 14 2.3.2 Cassette Unit 2.3.2.1 Lower Noise Optimize air channel system design to ensure the maximum quietness and comfort. Noise max down 6dB. 2.3.2.2 Turbo Mode (Optional) Turbo function can boost cooling or heating speed in a short period, and makes the room cool down or heat up rapidly.
- Page 15 2.3.2.6 Build-in Drain Pump The drain pump can lift the condensing water up to 750mm(29.53in) upmost. It’s convenient to install drainage piping under most space condition. 2.3.2.7Terminals For Alarm Lamp and Long-distance On-off Controller Connection Are Standard Reserve terminals for the connection of alarm lamp and long-distance on-off controller, more human control.
- Page 16 2.3.3 Console 2.3.3.1. Modern and Elegant Appearance The simple and stylish designs can nicely harmonies with your living space. 3.2.3.2. Four Panels optional 2.3.3.3. Two Air-outlet Ways Cooling mode Quick Cooling To maintain room temp Air outlet from top and bottom to make quick cooling ------When the A/C is just switched on, or room temp.
- Page 17 Heating mode Anti-cold air ------When the AC is just turn on, temperature of evaporator is very low, in this case, in order to prevent cold air direct blowing, only the upper louver is opened in a high position, the lower louver closed.
- Page 18 2.3.1 Ceiling-floor Units 2.3.1.1 Two-way Installation The rounded design of the ceiling and floor type air conditioner allows either ceiling or floor-level installation. Ceiling installation saves room space, while floor installation helps prevent the loss of warm air. 2.3.1.2 Brief Design ...
- Page 19 2.3.1.4 Optional Drainage Pipe Connection Both right side and left side drainage holes are available to avoid the space limitation for drainage pipe installation. Make you more convenient during installation. C Panel (LED display) D Panel 2.3.1.5 Convenience Operating and Easy Maintenance ...
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Page 20: Dimension
3. Dimension 3.1 Indoor Unit Duct Units air inlet from rear side Air filter ( optional ) 4-install hanger Liquid side Gas side 25 Drain pipe 25 Drain pipe Test mouth & Test cover 1 in 25 Drain connecting pipe ( for pump ) Fresh air intake Electric control box... - Page 21 Cassette Units(9K, 12K, 18K) Liquid side Gas side Body Drain hole Wiring connection port ( for Service ) E-parts box 4-Screw hole (for install panel) 4-install hanger (21.46in) 10.24in 22.44in Drain pipe 1-1/4in Fresh air intake 2.56in 2.95in Wiring connection port Panel Body Panel...
- Page 22 Cassette Units (24K, 36K, 48K) 92 92 Fresh air intake 2.95in 3.15in (5.35in) 4-install hanger (4.96in) Body (3.58in) Gas side 26.77in Liquid side Wiring connection port E-parts box Service hole for Test mouth & Test cover draining pump Drain hole 1-1/4in (7.72in) 92 92 92 92...
- Page 23 Console Units (27.56in) (8.27in) Hanging arm (7.68in) 16 Drain pipe Unit: mm (5/8in) Capacity (Btu/h) 9K / 12K inch 27.56 8.27 23.62...
- Page 24 Ceiling-floor Units (18K-48K) (1.30in) Wiring connection port (1.57in) Drain discharge port (4.72in) Fresh air intake Refrigerant pipe hole (4.72in) Hanging arm Capacity (Btu/h) 1068 18K / 24K inch 42.05 26.57 9.25 38.70 1285 1200 inch 50.59 26.57 9.25 47.24 1650 1565 inch 64.96...
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Page 25: Outdoor Unit
3.2 Outdoor Unit Note: The above drawing is only for reference. The appearance of your units may be different. Model MCHSU-09PHH2 MCHSU-12PHH2 inch 31.5 13.1 21.8 34.3 20.2 13.4 MCHSU-18PHH2 inch 33.3 14.3 27.6 36.0 21.3 13.8 MCHSU-24PHH2 1030 MCHS-30PSH2 inch 37.2 16.5... - Page 26 Model 1333 1045 MCHSU-48CSH2 inch 37.5 16.3 52.5 41.1 25.0 15.9...
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Page 27: Service Space
4. Service Space 4.1 Indoor Unit Duct Units Ensure enough space required for installation and maintenance. 200mm(7.87in) or more 300mm(11.81in) or more 600mmx600mm/23.62inx23.62in Check orifice All the indoor units reserve the hole to connect the fresh air pipe. The hole size as following 4.92in 6.30in 3.54mm... - Page 28 39.37 Console Unit 3.94in 39.37in Ceiling-floor Units 1.38in 39.37in...
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Page 29: Outdoor Unit
4.2 Outdoor Unit (Wall or obstacle) More than 30cm(11.81in) Air inlet More than 60cm More than 30cm (23.62in) (11.81in) Maintain channel More than 60cm Air inlet (23.62in) Air outlet More than 200cm(78.74in) -
Page 30: Refrigerant Cycle Diagram
5. Refrigerant Cycle Diagram INDOOR OUTDOOR Electronic CAPILIARY TUBE expansion valve LIQUID SIDE 2-WAY VALVE T3 Condenser temp. sensor HEAT EXCHANGE (EVAPORATOR) HEAT T4 Ambient T1 Room temp. T2 Evaporator EXCHANGE temp. sensor sensor temp. sensor (CONDENSER) middle T2B Evaporator temp. -
Page 31: Wiring Diagram
6. Wiring Diagram 6.1 Indoor Unit MEHSU-09CHC2, MEHSU-12CHC2, MEHSU-18CHC2， MEHSU-24CHC2 MEHSU-09CHD2, MEHSU-12CHD2, MEHSU-18CHD2,MEHSU-24CHD2... - Page 32 MEHSU-09CHN2, MEHSU-12CHN2 MEHSU-36CSC2， MEHSU-48CSC2...
- Page 33 MEHSU-36CSD2 MEHSU-48CSD2...
- Page 34 MEHSU-18CHF2, MEHSU-24CHF2 MEHSU-36CSF2...
- Page 35 MEHSU-48CSF2 MEHSU-36CSF2，MEHSU-48CSF2...
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Page 36: Outdoor Unit
6.2 Outdoor Unit MCHSU-09PHH2 ，MCHSU-12PHH2 ， MCHSU-18PHH2... - Page 37 MCHSU-24PHH2...
- Page 38 MCHSU-36CSH2...
- Page 39 MCHSU-48CSH2 PCB board of MCHSU-09PHH2, MCHSU-12PHH2, MCHSU-18PHH2 290-330VDC standby 210-300VDC running connect to the DR module bridge connect to reactance connect to earth fuse 250V 30A [V1.8] 2015-01-16 CN22 R141 CN6-1 PTC1 DSA1 R154 N-IN R155 R153 power supply 208-230V AC connect to the terminal FUSE 1 L-IN 65T 250V30A...
- Page 40 For MCHSU-24PHH2, MCHSU-36CSH2, Connect to the Indoor evap.pipe out temp. sensor T2B-A、T2B-B、T2B-C、T2B-D、T2B-E external drive DC fan 6 5 4 3 2 1 motor connector Electric Expansion Electric Expansion Electric Expansion testPort Electric Expansion Electric Expansion external drive DC fan external drive DC fan Value C connect to detector Value E...
- Page 41 For MCHSU-48CSH2...
- Page 42 IPM board of MCHSU-24PHH2, MCHSU-36CSH2, connect to DC fan motor TO MAIN 0VAC (standby) CN19 CN55 10-200VAC (running) EU-KFR105W/BP2T3N1-350(767).D.13.MP2-1 202302141237 IC17 IC11 IPM2 R107 IC12 R114 R111 IC16 CN57 R174 C103 R144 R182 C102 R147 R179 C101 CN57 R184 C106 R180 C105 Debug...
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Page 43: Fan Curves
7. Fan Curves Static Pressure ENC2 Range In. WG (Pa) Model 0.02 0.04 0.08 0.12 0.16 0-0.18 Model≤12 (10) (20) (30) (40) (0-45) 0.04 0.10 0.14 0.18 0.22 0-0.28 Model Model=18 (10) (25) (35) (45) (55) (0-70) (K Btu/h) 0.04 0.10 0.16 0.22... - Page 44 MEHSU-09CHD2, Code 0 Code 1 Code 2 Code 3 Code 4...
- Page 45 MEHSU-12CHD2 Code 0 Code 1 Code 2 Code 3 Code 4...
- Page 46 MEHSU-18CHD2 Code 0 Code 1 Code 2 Code 3 Code 4...
- Page 47 MEHSU-24CHD2 Code 0 Code 1 Code 2 Code 3 Code 4...
- Page 48 MEHSU-36CSD2 Code 0 Code 1 Code 2 Code 3 Code 4...
- Page 49 MEHSU-48CSD2 Code 0 Code 1 Code 2 Code 3 Code 4...
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Page 50: Electric Characteristics
8 Electric Characteristics Indoor Unit Model Voltage Min. Max. MEHSU-09CHC2 208-230V 187V 253V MEHSU-09CHD2 208-230V 187V 253V MEHSU-09CHN2 208-230V 187V 253V MEHSU-12CHC2 208-230V 187V 253V MEHSU-12CHD2 208-230V 187V 253V MEHSU-12CHN2 208-230V 187V 253V MEHSU-18CHC2 208-230V 187V 253V MEHSU-18CHD2 208-230V 187V... -
Page 51: Sound Level
9 Sound Level 9.1 Indoor unit Concealed Duct Type Discharge Suction Duct Duct 1.4m (4.59ft) Microphone Noise level dB(A) Model MEHSU-09CHD2 MEHSU-12CHD2 MEHSU-18CHD2 MEHSU-24CHD2 MEHSU-36CSD2 MEHSU-48CSD2... - Page 52 1.4m (4.59ft) Microphone Noise level dB(A) Model MEHSU-09CHC2 MEHSU-12CHC2 MEHSU-18CHC2 MEHSU-24CHC2 MEHSU-36CSC2 MEHSU-48CSC2...
- Page 53 Microphone (3.28ft) 1.5m (4.92ft) Noise level dB(A) Model MEHSU-09CHN2 MEHSU-12CHN2 Microphone (3.28ft) 1.5m (3.28ft) (4.92ft) Air outlet side (3.28ft) Microphone Noise level dB(A) Model MEHSU-18CHF2 MEHSU-24CHF2 MEHSU-36CSF2 MEHSU-48CSF2...
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Page 54: Outdoor Unit
9.2 Outdoor unit Outdoor Unit Microphone 1.0m (3.28ft) Note: H= 0.5 × height of outdoor unit Model Noise Level dB(A) MCHSU-09PHH2 MCHSU-12PHH2 MCHSU-18PHH2 MCHSU-24PHH2 MCHSU-36CSH2 MCHSU-48CSH2... -
Page 55: Accessories
10 Accessories Duct Units Name Shape Quantity Soundproof / insulation sheath Tubing & Fittings Binding tape Seal sponge Drain joint Drainpipe Fittings (for cooling & heating) Seal ring Wired controller & Its Frame Wired controller ， Owner s manual Others Installation manual Magnetic ring (twist the electric wires L EMS &... - Page 56 provided the following accessories) Remote controller holder Mounting screw(ST2.9×10-C-H) Remote controller manual Alkaline dry batteries (AM4) Owner's manual Others Installation manual Installation accessory Expansible hook (The product you have might not be provided the Installation hook following accessories Orifice Console Units Name Shape Quantity...
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Page 57: The Specification Of Power
11 The Specification of Power Type 9K-18K Phase 1-phase 1-phase Power Frequency and Voltage 208-230V, 60Hz 208-230V, 60Hz Circuit Breaker/ Fuse (A) 25/20 40/30 Indoor Unit Power Wiring (mm Ground Wiring Indoor/Outdoor Outdoor Unit Power Wiring 3×2.5 3×2.0 Connecting Strong Electric Signal 4×1.0 4×1.5 Wiring... - Page 58 12 Field Wiring 36K, 48K...
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Page 59: Installation Details
blockage of the heat exchanger in the 12 Installation Details outdoor unit. If is built over the unit to prevent direct sunlight, rain exposure, direct strong wend, 12.1 Location selection snow and other scraps accumulation, make Indoor unit location selection 12.1.1 sure that heat radiation from the condenser ... - Page 60 Insert the air filter through the filter slot and fix it Size of outline dimension mounted with 2 screws. Capacity(KBtu) plug 29.13 13.78 29.13 13.78 37.80 13.78 37.80 13.78 12.2.1.6 Install the air duct 1180 Please design duct below 46.46 19.29 recommended picture 1240...
- Page 61 ③ When install the filter mesh, please plug it into flange inclined from air return opening, and then push up. 12.2.2.2 Bolt pitch ④ The installation has finish, upon filter mesh which fixing blocks have been insert to the flange positional holes. 21.46in 22.44in 25.47in...
- Page 62 If the ceiling is extremely high, please determine the length of the installation hook depending on the real situation. 12.2.2.4 Install the main body Make the 4 suspender through the 4 hanger of the main body to suspend it. Adjust the 12.2.2.5 Install the panel hexangular nuts on the four installation hooks Remove the grille...
- Page 63 (The bottom of body can touch with floor or suspended, but the body must install vertically.) Hang the air-in grill to the panel, then connect the lead terminator of the swing motor and that control with corresponding 14.2.4 Ceiling-floor unit installation terminators on the body respectively.
- Page 64 ② Wall-mounted installation 12.2.4.3 Install the pendant bolt Locate the hanging arm on the hanging screw ① Ceiling installation bolt. Prepare the mounting bolts on the unit. Select the position of installation hooks according to the hook holes positions showed in upper picture.
- Page 65 12.2.5 Slim cassette indoor unit Select the position of installation hooks installation according to the hook holes positions showed 12.2.5.1 Service space for indoor unit in upper picture. Drill four holes of Ø12mm(0.47in), 45~50mm(1.77~1.97in) deep at the selected 39.37in positions on the ceiling. Then embed the expansible hooks (fittings).
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Page 66: Outdoor Unit Installation
Tighten the screws under the panel hooks till the panel closely stick on the ceiling to avoid condensate water. 12.2.5.5 Install the panel Remove the grille Hang the air-in grill to the panel, then connect the lead terminator of the swing motor and that of the control box with corresponding terminators on the body respectively. -
Page 67: Refrigerant Pipe Installation
Considering the allowable pipe length and height drop to decide the installation position. More than 60cm Make sure the distance and height drop (23.62in) between indoor and outdoor unit not exceeded the date in the following table. Max. Length Max. Elevation Model 9,000Btu/h 82.2... - Page 68 Flare dimension A Pipe 3/4" (19) 990~1210 9270~11860 (mm/in) diamete Flare shape 12.4.3 First-Time Installation 1/4" Air and moisture in the refrigerant system 90 ° 4 8.3/0.33 8.7/0.34 (6.35) cause the following problems: ● Increases in system pressure 3/8" 12.0/0.4 12.4/0.49 ●...
- Page 69 5) Turn on the vacuum pump to begin After purging the air, use a torque wrench to evacuation. tighten the flare nut on the 2-way valve. 6) Conduct a 30-minute evacuation. Check 4). Check for gas leaks. whether the compound meter indicates Check the flare connections for gas leaks.
- Page 70 3) Place the charging cylinder onto the 5). Turn on the air conditioner in cooling mode. electronic scale and record the weight. Turn when gauge indicates 4) Turn on the air conditioner in cooling mode. -0.1MPa(14.5Psi). 5) Open the valves (Low side)on the charge set 6).Immediately close the 3-way valve and charge the system with liquid refrigerant.
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Page 71: Drainage Pipe Installation
6). Disconnect the charge set and the charging Procedure: cylinder, and open the 2-way and 3-way valves 1). Connect the charge hose to the charging Be sure to use a hexagonal wrench to operate cylinder. Open the 2-way 3-way valve. the valve stems. - Page 72 Ensure at least 1/100 slope of the drainage Attention: Adopt PVC40 or bigger pipe to be the pipe main pipe. Adopt suitable pipe diameter For Vertical drainage pipe (The following Adopt nearby condensate water discharge table is for reference) Reference 12.5.2 Key points of drainage water pipe value...
- Page 73 Drainage pipe Drainage pipe Drain tee Drainage pipe Water flow Water flow Hanger Water flow Water flow Water flow Down incline pipe Drain tee Drain tee Water flow Water flow Water flow Water flow A:Length of horizontal pipe ≤ 150mm B: Lift height ≤...
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Page 74: Vacuum Drying And Leakage Checking
drainage outlet. (In light of the length of drainage pipe, water shall be discharged about 1 minute delayed) 2.3 Stop the operation of air conditioner, power off the power supply and put the cover of water test hole back to the original place. After stopped the air conditioner 3 minutes, check whether there is anything abnormal. -
Page 75: Additional Refrigerant Charge
Ice-blockage shall cause abnormal Special vacuum drying operation of system, while copper oxide The special vacuum drying method shall be shall damage compressor. adopted when: Eliminating the non-condensable gas (air) in system to prevent the components Finding moisture during flushing refrigerant oxidizing, pressure fluctuation and bad heat pipe. -
Page 76: Engineering Of Insulation
After the vacuum drying process is carried out, the additional refrigerant charge Purpose of refrigerant pipe insulation process needs to be performed. During operation, temperature of gas pipe The outdoor unit is factory charged with and liquid pipe shall be over-heating or refrigerant. -
Page 77: Engineering Of Electrical Wiring
The insulation material at the joint pipe All field wiring construction should be shall be banded to the gap pipe and liquid pipe finished by qualified electrician. tightly. Air conditioning equipment should be The linking part should be use glue to paste grounded according to the local electrical together regulations. - Page 78 The gas-side and liquid-side stop values are both opened. The air conditioner is pre-heated by turning on the power. Test operation Set the air conditioner under the mode of "COOLING" by remote controller, and check the following points. Indoor unit ...
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Page 79: Operation Characteristics
13. Operation Characteristics Temperature Cooling operation Heating operation Drying operation Mode 0℃～30℃ 10℃～32℃ Room temperature 17℃～32℃(62℉～90℉) (32℉～86℉) (50℉～90℉) 0℃～50℃ (32℉～122℉) Outdoor temperature -15℃～30℃ （-15℃～50℃(5℉～122℉)：For (Entry level) (5℉～86℉) the models with low temperature 0℃～50℃ cooling system） (32℉～122℉) Outdoor temperature -25℃～30℃ -25℃～50℃(-13℉～122℉) (E-Star level) (-13℉～86℉) Outdoor temperature... -
Page 80: Electronic Function
connector for fan motor from the electronic control board. ○ 4) Remove the four fixing screws of the fan motor. 5) Then remove the fan motor. Electrical How to remove the parts ○ electrical parts. 1) After finish work of item 1 and item 2, remove the connectors for the compressor and reactor. - Page 81 four way valve. ○ ○ 3) Pull out connectors of the compressor top temp. sensor, condenser coil temp. sensor(T3),outdoor ambient temp. sensor(T4) and discharge temp. sensor(T5). ○ 4) disconnect the electronic expansion valve wire 5) remove the compressor ○ Crankcase electric heater...