Midea MEHS-09PSH1 Service Manual
  1. Manuals
  2. Brands
  3. Midea Manuals
  4. Air Conditioner
  5. MEHS-09PSH1
  6. Service manual

Midea MEHS-09PSH1 Service Manual

Mission 3d inverter series indoor/outdoor units
Hide thumbs
Table of Contents

Advertisement

Quick Links

Mission 3D Inverter Series
Service Manual 2016
MBSUL-A-1604

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the MEHS-09PSH1 and is the answer not in the manual?

Questions and answers

Related Manuals for Midea MEHS-09PSH1

Summary of Contents for Midea MEHS-09PSH1

  • Page 1 Mission 3D Inverter Series Service Manual 2016 MBSUL-A-1604...

  • Page 2: Table Of Contents

    CONTENTS 1. Precaution ..............................3 1.1 Safety Precaution .......................... 3 1.2 Warning ............................3 2. Model list ..............................6 3. Dimension ..............................7 3.1 Indoor Unit ............................. 7 3.2 Outdoor Unit ..........................9 4. Refrigerant Cycle Diagram ........................10 5. Wiring Diagram ............................11 5.1 Indoor Unit ............................

  • Page 3: Precaution

    careful of the case edges and the fins on the condenser and evaporator. 1. Precaution  For installation, always contact the dealer or an authorized service center. 1.1 Safety Precaution  Do not install the product on a  To prevent injury to the user or other defective installation stand.
  • Page 4  It can avoid vibration of water leakage. Stop operation and close the window  in storm or hurricane. If possible, remove Do not install the product where the the product from the window before the noise or hot air from the outdoor unit could hurricane arrives.
  • Page 5 cleaning or maintaining the product. Be careful and avoid personal injury.  Replace the all batteries in the remote control with new ones of the same type. Do not mix old and new batteries or different types of batteries. There is risk of fire or explosion. ...

  • Page 6: Model List

    2. Model list Model Names of Indoor/Outdoor Units Capacity Indoor units Outdoor units 9k(115V) MEHS-09PSH1 MCHS-09PSH1 MEHSU-09PHH2 MCHSU-09PHH2 12k(115V) MEHS-12PSH1 MCHS-12PSH1 MEHSU-12PHH2 MCHSU-12PHH2 3D inverter MEHSU-18PHH2 MCHSU-18PHH2 MEHSU-24PHH2 MCHSU-24PHH2 MEHS-30PSH2 MCHS-30PSH2 MEHS-36PSH2 MCHS-36PSH2...

  • Page 7: Dimension

    3. Dimension 3.1 Indoor Unit Model 9k(115V&230V) 31.89(810) 7.87(200) 11.81(300) 12k(115V&230V) 31.89(810) 7.87(200) 11.81(300) 42.91(1090) 9.25(235) 13.31(338) 42.91(1090) 9.25(235) 13.31(338) 54.15(1350) 10.71(272) 14.37(365) 54.15(1350) 10.71(272) 14.37(365)
  • Page 8 For 9k & 12k: For 18k & 24k: For 30k & 36k:...

  • Page 9: Outdoor Unit

    3.2 Outdoor Unit More than 30cm(11.8in) More than 60cm(23.6in) (Service space) More than 30cm(11.8in) More than 60cm(23.6in) More than 70cm(27.6in) Note: The above drawing is only for reference. The appearance of your units may be different. Model W in(mm) D in(mm) H in(mm) W1 in(mm) A in(mm)

  • Page 10: Refrigerant Cycle Diagram

    4. Refrigerant Cycle Diagram INDOOR OUTDOOR CHECK VALVE LIQUID SIDE (Heating Model only) 2-WAY VALVE CAPILIARY TUBE HEAT HEAT EXCHANGE EXCHANGE (EVAPORATOR) (CONDENSER) T1 Room temp. sensor T2 Evaporator temp. sensor GAS SIDE 4-WAY VALVE 3-WAY VALVE ACCUMULATOR COOLING COMPRESSOR HEATING...

  • Page 11: Wiring Diagram

    5. Wiring Diagram 5.1 Indoor Unit MEHS-09PSH1, MEHS-12PSH1, MEHSU-09PHH2, MEHSU-12PHH2...
  • Page 12 MEHSU-18PHH2, MEHSU-24PHH2, MEHS-30PSH2, MEHS-36PSH2,...
  • Page 13 5.2 Outdoor Unit MCHS-09PSH1, MCHS-12PSH1, MCHSU-09PHH2, MCHSU-12PHH2, MCHSU-18PHH2,...
  • Page 14 MCHSU-24PHH2,, MCHS-30PSH2, MCHS-36PSH2,...

  • Page 15: Installation Details

    6 Installation Details 6.1 Wrench torque sheet for installation Additional tightening Standard Max. Length Additional Outside diameter Torque Models Max. Elevation torque length refrigerant Ф 1500N.cm(153kgf.cm/ 1600N.cm(163kgf.cm/1 1/4in 7.5m(24.6ft) 10m(32.8ft) 25m(82.0ft) 15g/m(0.16oz/ft) 6.35mm 11lb.ft) 1.8lb.ft) &12k Ф 2500N.cm(255kgf.cm/ 2600N.cm(265kgf.cm/1 7.5m(24.6ft) 20m(65ft) 30m(98ft) 15g/m(0.16oz/ft)

  • Page 16: Installation For The First Time

    valve. 6.4 Installation for the first time 5) Operate the vacuum pump to evacuate. Air and moisture in the refrigerant system have 6) Make evacuation for 30 minutes and check undesirable effects as below: whether the compound meter indicates ● Pressure in the system rises. ●...

  • Page 17: Re-Installation While The Indoor Unit Need To Be Repaired

    R410A, make the cylinder bottom up to ensure 2). Connect the charge hose with the push pin of liquid charge. handle lo to the 3-way valves gas service port. 2). Purge the air from the charge hose. 3). Air purging of the charge hose. Open the valve at the bottom of the cylinder Open the handle Lo valve of the manifold valve and press the check valve on the charge set to...

  • Page 18: Re-Installation While The Outdoor Unit Need To Be Repaired

    should be pumped 20 minutes more. If the pressure can’t achieve -0.1Mpa(14.5Psi) after pumping 50 minutes, please check if there are some leakage points. Fully close the handle Lo valve of the manifold valve and stop the operation of the vacuum pump. Confirm that the gauge needle does not move (approximately 5 minutes after turning off the vacuum pump).

  • Page 19: Operation Characteristics

    7. Operation Characteristics 9k(115V) 12k(115V) 9k(230V) 12k(230V) Cooling Outdoor 4-122 4-122 4-122 4-122 4-122 4-122 4-122 4-122 Min - Max °F (°C) (-20-50) (-20-50) (-20-50) (-20-50) (-20-50) (-20-50) (-20-50) (-20-50) Indoor Min 63-86 63-86 63-86 63-86 63-86 63-86 63-86 63-86 °F (°C) - Max DB (17-30)

  • Page 20: Electronic Function

    Dispalys ‘ ’ under deforsting operation. 8. Electronic function Dispalys ‘ ’ when anti-cold air feature is 8.1 Abbreviation activated under heating mode. T1: Indoor room temperature Dispalys ‘ ’ during self clean operation (if T2: Coil temperature of evaporator aplicable).

  • Page 21: Main Protection

    can better prevent the compressor being 8.3 Main Protection damaged by refrigerant leakage or compressor 8.3.1 Three minutes delay at restart for overload. compressor Open condition: Less than 1 minute delay for the 1 time When compressor is active, the value of the stand-up and 3 minutes delay for others.

  • Page 22: Operation Modes And Functions

    8.4 Operation Modes and Functions 8.4.1 Fan mode ( 1) Outdoor fan and compressor stop. (2) Temperature setting function is disabled, and no setting temperature is displayed. (3) Indoor fan can be set to high/med/low/auto. (4) The louver operates same as in cooling mode.
  • Page 23 8.4.3.3 Indoor fan running rules When the compressor is on, the indoor fan can be set to high/med/low/auto/mute. Decrease When indoor unit coil temp. is low, the anti-cold air function will start and indoor fan motor will Hold run at low speed, the speed can’t be Resume changed ,when the temp.
  • Page 24 for certain time and then choose mode “ .” Will be displayed. according to T1-Ts. 8.4.3.5 Evaporator coil temperature If the setting temperature is modified, the machine will choose running function again. protection 8.4.5 Drying mode Indoor fan speed is fixed at breeze and can’t be changed.
  • Page 25 8.4.8 8℃ Heating(optional) When the compressor is running, the indoor fan motor will run without anti-cold air function. When the compressor is off, the indoor fan motor is off .
  • Page 26 8.4.9 Point check function Press the LED DISPLAY or LED or MUTE button of the remote controller three times, and then press the AIR DIRECTION or SWING button three times in ten seconds, the buzzer will keep ring for two seconds.
  • Page 27 Enquiry Display value Meaning Remark information T1,T2,T3,T4, -1F,-1E,-1d,-1c,- -25,-24,-23,-22,-21,-2 1. All the displaying temperature is actual T2B,TP,TH, 1b,-1A value. Targeted 2. All the temperature is °C no matter what -19—99 -19—99 Frequency, kind of remote controller is used. A0,A1,…A9 100,101,…109 Actual 3.

  • Page 28: Troubleshooting

    9. Troubleshooting Safety Electricity power is still kept in capacitors even the power supply is shut off. Do not forget to discharge the electricity power in capacitor. Electrolytic Capacitors (HIGH VOLTAGE! CAUTION!) For other models, please connect discharge resistance (approx.100Ω 40W) or soldering iron (plug) between +, - terminals of the electrolytic capacitor on the contrary side of the outdoor PCB.

  • Page 29: Indoor Unit Error Display

    9.1 Indoor Unit Error Display Operation Timer lamp Display LED STATUS lamp ☆ 1 time Indoor unit EEPROM parameter error ☆ 2 times Indoor / outdoor units communication error ☆ 4 times Indoor fan speed has been out of control Indoor room temperature sensor T1 open circuit or short ☆...

  • Page 30: Outdoor Unit Error Display

    9.2 Outdoor unit error display For 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 C N6 R1 41 C N6 -1 PTC1 D SA1 R1 54...
  • Page 31 For MCHS-09PSH1, MCHS-12PSH1, connect to PFC Capacitor when is on, 100-130V AC output connect to reactor when is on, 100-130V AC output US-KFR-35W/BP3N1-(115V+RX62T+41560).D.13.WP2-1 CN4_1CN4_2 CN4_3CN4_4 connect to Ground bridge REACTOR connect to N-line DSA1 (100-130VAC INPUT) connect to L-line (100-130VAC INPUT) CN 16 connect to indoor unit T20 A/ 25 0V AC...
  • Page 32 For MCHSU-24PHH2, MCHS-36PSH2, MCHS-30PSH2, 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 Electric Expansion Electric Expansion testPort external drive DC fan external drive DC fan Value C Value E...
  • Page 33 IPM board, connect to DC fan motor TO MAIN 0VAC (standby) CN19 CN55 10-200VAC (running) EU-KFR105W/BP2T3N1-350(767).D.13.MP2-1 202302141237 IPM2 CN57 Debug connect to the compressor 0VAC (standby) 10-200VAC (running) CAPACITOR Voltage IPM1 290-330VDC (standby) 210-300VDC (Running) C N54 L-IN2 EARTH [1.6]2014.10.16 PFC-L1 CN58 CN53...

  • Page 34: Diagnosis And Solution

    9.3 Diagnosis and Solution 9.3.1 EEPROM parameter error diagnosis and solution(E0/F4) E0/F4 Error Code Malfunction decision Indoor or outdoor PCB main chip does not receive feedback conditions from EEPROM chip. Supposed causes Installation mistake ● PCB faulty ● Trouble shooting: EEPROM: a read-only memory whose contents can be erased and reprogrammed using a pulsed voltage.
  • Page 35 9.3.2 Indoor / outdoor unit’s communication diagnosis and solution(E1) Error Code Malfunction decision Indoor unit does not receive the feedback from outdoor unit during conditions 110 seconds and this condition happens four times continuously. Supposed causes Wiring mistake ● Indoor or outdoor PCB faulty ●...
  • Page 36 Remark: Use a multimeter to test the DC voltage between 2 port and 3 port of outdoor unit. The red pin of multimeter connects with 2 port while the black pin is for 3 port. When AC is normal running, the voltage will move alternately between -25V to 25V.
  • Page 37 9.3.3 Zero crossing detection error diagnosis and solution (E2) Error Code Malfunction decision When PCB does not receive zero crossing signal feedback for 4 conditions minutes or the zero crossing signal time interval is abnormal. Supposed causes Connection mistake ● PCB faulty ●...
  • Page 38 9.3.4 Fan speed has been out of control diagnosis and solution(E3) E3/F5 Error Code Malfunction decision When indoor fan speed keeps too low (300RPM) for certain time, conditions the unit will stop and the LED will display the failure. Supposed causes Wiring mistake ●...
  • Page 39 Index 1: 1:Indoor or Outdoor DC Fan Motor(control chip is in fan motor) Power on and when the unit is in standby, measure the voltage of pin1-pin3, pin4-pin3 in fan motor connector. If the value of the voltage is not in the range showing in below table, the PCB must has problems and need to be replaced.
  • Page 40 9.3.5 Open circuit or short circuit of temperature sensor diagnosis and solution(E5) E4/E5/F1/F2/F3 Error Code Malfunction decision If the sampling voltage is lower than 0.06V or higher than 4.94V, conditions the LED will display the failure. Supposed causes Wiring mistake ●...
  • Page 41 9.3.6 Refrigerant Leakage Detection diagnosis and solution(EC) Error Code Malfunction decision Define the evaporator coil temp.T2 of the compressor just starts conditions running as Tcool. In the beginning 5 minutes after the compressor starts up, if T2 ＜Tcool－2 °C( Tcool－35.6 °F) does not keep continuous 4 seconds and this situation happens 3 times, the display area will...
  • Page 42 9.3.6 Overload current protection diagnosis and solution(F0) Error Code Malfunction decision An abnormal current rise is detected by checking the specified conditions current detection circuit. Supposed causes Power supply problems. ● System blockage ● PCB faulty ● Wiring mistake ● Compressor malfunction ●...
  • Page 43 9.3.7 IPM malfunction or IGBT over-strong current protection diagnosis and solution(P0) Error Code Malfunction decision When the voltage signal that IPM send to compressor drive chip conditions is abnormal, the display LED will show “P0” and AC will turn off. Supposed causes Wiring mistake ●...
  • Page 44 For example: Note: The photos below are only for reference, it’s may be not same totally with the ones on your side.
  • Page 47 For 24K~36K: At first test the resistance between every two ports of U, V, W of IPM and P, N. If any result of them is 0 or close to 0, the IPM is defective. Otherwise, please follow the procedure below:...
  • Page 48 9.3.8 Over voltage or too low voltage protection diagnosis and solution(P1) Error Code Malfunction decision An abnormal voltage rise or drop is detected by checking the conditions specified voltage detection circuit. Supposed causes Power supply problems. ● System leakage or block ●...
  • Page 49 9.3.9 High temperature protection of IPM module or compressor top diagnosis and solution(P2) Error Code Malfunction decision If the sampling voltage is not 5V, the LED will display the failure. conditions Supposed causes Installation mistake ● Power supply problems. ● System leakage or block ●...
  • Page 50 9.3.10 Inverter compressor drive error diagnosis and solution(P4) Error Code Malfunction decision An abnormal inverter compressor drive is detected by a special conditions detection circuit, including communication signal detection, voltage detection, compressor rotation speed signal detection and so on. Supposed causes Wiring mistake ●...
  • Page 51 IPM continuity check Turn off the power, let the large capacity electrolytic capacitors discharge completely, and dismount the IPM. Use a digital tester to measure the resistance between P and UVWN; UVW and N. Digital tester Normal resistance value Digital tester Normal resistance value (+)Red (-)Black...
  • Page 52 For 24K~36K: At first test the resistance between every two ports of U, V, W of IPM and P, N. If any result of them is 0 or close to 0, the IPM is defective. Otherwise, please follow the procedure below:...

  • Page 53: Error Code

    9.3.11 Low pressure protection diagnosis and solution(P6) Error Code Malfunction decision When the pressure of system reach a certain value, the low conditions pressure protector will switch off. After the pressure resume to normal ,the protection code will disappear. Supposed causes Wiring mistake ●...
  • Page 54 Main parts check 1. Temperature sensor checking Disconnect the temperature sensor from PCB, measure the resistance value with a tester. Temperature sensors. Room temp.(T1) sensor, Indoor coil temp.(T2) sensor, Outdoor coil temp.(T3) sensor, Outdoor ambient temp.(T4) sensor, Compressor discharge temp.(TP) sensor. Measure the resistance value of each winding by using the multi-meter.
  • Page 55 Appendix 1 Temperature Sensor Resistance Value Table for T1,T2,T3,T4 (°C--K) °C °F °C °F °C °F °C °F K Ohm K Ohm K Ohm K Ohm 115.266 12.6431 2.35774 0.62973 108.146 12.0561 2.27249 0.61148 101.517 11.5 2.19073 0.59386 96.3423 10.9731 2.11241 0.57683 89.5865...
  • Page 56 Appendix 2 Temperature Sensor Resistance Value Table for TP (°C --K) °C °F °C °F °C °F °C °F K Ohm K Ohm K Ohm K Ohm 542.7 68.66 13.59 3.702 511.9 65.62 13.11 3.595 62.73 12.65 3.492 455.9 59.98 12.21 3.392 430.5...
  • Page 57 Appendix 3: °C °F °C °F °C °F °C °F °C °F 69.8 123.8 179.6 235.4 24.8 71.6 125.6 181.4 237.2 26.6 73.4 127.4 183.2 28.4 75.2 129.2 240.8 30.2 186.8 242.6 25.5 77.9 132.8 188.6 244.4 32.9 78.8 134.6 190.4 246.2 33.8...
  • Page 58 Appendix 4 Normal voltage of P and N 208-240V(1-phase,3-phase) 380-420V(3-phase) In standby around 310VDC around 530VDC In operation With passive PFC With partial active With fully active module PFC module PFC module >200VDC >310VDC >370VDC >450VDC...
  • Page 59 2.Compressor checking Measure the resistance value of each winding by using the tester. Position Resistance Value ASN98D22UFZ ASM98D32UFZ ATM115D43UFZ2 Blue - Red 1.57Ω 2.3Ω 1.78Ω Blue - Black (20℃/68℉) (20℃/68℉) (20℃/68℉) Red - Blue Position Resistance Value ATF235D22UMT ATF250D22UMT Blue - Red 0.75Ω...
  • Page 60 3. IPM continuity check Turn off the power, let the large capacity electrolytic capacitors discharge completely, and dismount the IPM. Use a digital tester to measure the resistance between P and UVWN; UVW and N. Digital tester Normal resistance value Digital tester Normal resistance value (+)Red...
  • Page 61 4: Pressure On Service Port Cooling chart: °F ° (23.89) (29.44) (35) (40.56) (46.11) 70/59 10.1 75/63 10.7 80/67 11.2 °F ° (23.89) (29.44) (35) (40.56) (46.11) 70/59 75/63 80/67 °F ° (23.89) (29.44) (35) (40.56) (46.11) 70/59 0.82 0.78 0.81 0.86 1.01...
  • Page 62 Heating Chart: °F 57/53 47/43 37/33 27/23 17/13 °C (13.89/11.67) (8.33/6.11) (2.78/0.56) (-2.78/-5) (-8.33/-10.56) 30.3 28.5 25.3 22.8 20.8 32.5 30.0 26.6 25.4 23.3 33.8 31.5 27.8 26.3 24.9 °F 57/53 47/43 37/33 27/23 17/13 °C (13.89/11.67) (8.33/6.11) (2.78/0.56) (-2.78/-5) (-8.33/-10.56) °F 57/53...

  • Page 63: Disassembly Instructions

    10 Disassembly Instructions Note: This part is for reference, the photos may have slight difference with your machine. 10.1 Indoor unit Parts name Procedures Remarks Front panel How to remove the front panel. Pull the below side of the panel toward you and remove the cover Release the connector of the display ass’y.
  • Page 64 Electrical How to remove the electrical parts parts. ② Remove the front panel from procedure 1. Pull out the room temp. sensor (T1). Remove the two screws for the ground ③ connection. Remove the fixing screw. ② Pull out the coil temp. sensor.
  • Page 65 Evaporator How to remove the evaporator. After remove the electrical parts from procedure 2, disassemble the pipe holder ① at the rear side of the unit. Remove the screws on the ② evaporator at the fixed plate. ③ Remove the two screws on the evaporator at the base bearing side.
  • Page 66 Fan motor How to remove the fan motor. and Fan Remove the front panel, electrical parts and evaporator following procedure 1-3. Remove the two screws and remove the fixing board of fan motor. ② Remove the fixing screw . ③ Pull out the fan motor and fan ass’y from the side direction.
  • Page 67 10.2 Outdoor unit Note: This part is for reference, the photos may have slight difference with your machine. MCHS-09PSH1， Part name Procedures Remarks Panel plate How to remove the panel Screws of top panel(3 screws,1 screws is under plate. the big handle) 3 screw of 1)Stop operation of the big handle...
  • Page 68 Fan ass’y How to remove the fan ass’y. 1)After remove the Air outlet grille. ○ 2) Remove the nut fixing the fan, and remove the fan. ○ 3) After remove the top cover .Unfix the hooks and then open the electronic control box cover.
  • Page 69 T3,T4,T5 sensor Electronic expansion valve Motor compressor 4) Disconnect the 4 way valve connector for fan motor from the electronic control board. ④ ○ 5) Remove the four fixing screws of the fan motor, then remove the motor.
  • Page 70 Electrical How to remove the parts electrical parts. After finish work of item 1 and item 2, remove the connector for the compressor . ○ Pull out the two blue wires connected with the four way valve. 3) Pull out connectors of ○...
  • Page 71 4) Disconnect the electronic expansion valve ④ wire from the control board 5) Remove the ground wires . 6) Remove the ○ ○ wires(1,2,3). Then remove the electronic control box.
  • Page 72 Four-way How to remove the valve The picture of four-way valve may be different from four-way valve. the one on your side. 1）Perform work of item 1,3. ④ ○ 2)Recover refrigerant from the refrigerant circuit. 3)Remove the screw of the coil and then remove the coil.
  • Page 73 MCHSU-09PHH2，MCHS-12PSH1，MCHSU-12PHH2， Part name Procedures Remarks Panel plate How to remove the panel Screws of top panel (3 screws, 1 screw is under the big plate. handler) 3 screws 1) Stop operation of of the big handler the air conditioner and turn “OFF”...
  • Page 74 Fan ass’y How to remove the fan ass’y. 1)After remove the Air outlet grille, remove the hex nut fixing the fan and then remove the fan. ○ ○ 2) After remove the top cover .Unfix the hooks and then open the electronic control box cover.
  • Page 75 compressor T3,T4,T5 sensor 3)Disconnect the ○ connector for fan motor from the electronic control board. 4 way valve Motor Electronic expansion valve ③ 4)Remove the four fixing screws of the fan motor. ○ Then remove the fan motor.
  • Page 76 ○ Electrical How to remove the parts electrical parts. 1) After finish work of item 1 and item 2, remove the connectors for the compressor. ○ 2) Pull out the two blue wires connected with the four way valve. ○ 3) Pull out connectors of the condenser coil temp.
  • Page 77 5) Remove the ○ ○ grounding screw. 6) Remove the Wires (1,2,3). Then remove the electronic control box. Four-way How to remove the valve The picture of four-way valve may be different from four-way valve. the one on your side. ○...
  • Page 78 compressor on bottom plate. ○ 4) Lift the compressor from the base pan assembly.
  • Page 79 MCHSU-18PHH2， Part name Procedures Remarks Panel plate How to remove the panel plate. 4 screws of top panel 1) Stop operation of 3 screws of the air conditioner and turn big handle “OFF” the power breaker. 9 screws of front panel ○...
  • Page 80 Fan ass’y How to remove the fan ass’y. 1) After remove the Air outlet grille, remove the hex nut fixing the fan and then remove the fan. ○ ○ 2) After remove the top cover . Unfix the hooks then open the electronic control box cover.
  • Page 81 Compressor wire T3,T4,T5 sensor wire Motor wire Electronic expansion valve Electric pipe heater and Crankcase electric heater 4 way valve wire 3) Disconnect the ○ connector for fan motor from the electronic control board. ○ 4) Remove the four fixing screws of the fan motor.
  • Page 82 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. ○ 2) Pull out the two blue wires connected with the four way valve. ○...
  • Page 83 ○ 4) disconnect the electronic expansion valve wire ○ 5) remove the electric heaters 6) Remove the grounding screw. 7) Remove the wires(1,2,3 or L1,L2,S). Then remove the electronic control box. ⑥ ○...
  • Page 84 Four-way How to remove the valve The picture of four-way valve may be different from four-way valve. the one on your side. ④ 1)Perform work of ○ item1,3. 2) Recover refrigerant from the refrigerant circuit. 3)Remove the screw of the coil and then remove the coil.
  • Page 85 MCHSU-24PHH2,MCHS-30PSH2,MCHS-36PSH2, Part name Procedures Remarks Panel plate How to remove the panel 3 screws of top panel plate. 1) Stop operation of the air conditioner and turn “OFF” the power 4 screws of big breaker. handle 11 screws of front panel ○...
  • Page 86 Fan ass’y How to remove the fan ass’y. 1)After remove the Air outlet grille, remove the hex nut fixing the fan and then remove the fan. ○ ○ 2) After remove the top cover .Unfix the hooks and screws,then open the electronic control box cover.
  • Page 87 Compressor wire T3,T4,T5 sensor wire 3) Disconnect the 4 way valve Electric pipe heater connector for fan motor Electronic expansion and Crankcase electric from the electronic control Valve wire Heater wire Motor wire board. ○ 4)Remove the four fixing screws of the fan motor. Then remove the fan ○...
  • Page 88 Electrical How to remove the ○ parts electrical parts. 1) After finish work of item 1 and item 2, remove the three connectors for the compressor and the ○ compressor crankcase heater and the chassis electric heater. 2) Pull out the two blue wires connected with the four way valve.
  • Page 89 5) Remove the ○ ○ grounding screw. 6) Remove the power supply wires(1,2,3 or L1,L2,S). Then remove the electronic control box. Four-way How to remove the valve The picture of four-way valve may be different from four-way valve. the one on your side. ○...
  • Page 90 Compressor How to remove the ○ compressor. 1) After perform work of item1,3. Recover refrigerant from the refrigerant circuit. 2) Remove the discharge pipe and suction pipe with a burner. ○ 3) Remove the hex nuts and washers fixing the compressor on bottom plate.

This manual is also suitable for:

Mehs-12psh1Mehsu-09phh2Mehsu-24phh2Mehsu-12phh2Mehs-30psh2Mehs-36psh2 ... Show all

Table of Contents

Save PDF