Midea MHG-24HWFN1-Q Service Manual
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Midea MHG-24HWFN1-Q Service Manual

Midea MHG-24HWFN1-Q Service Manual

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Australian Products
SUPER DC INVERTER SERIES
Service Manual 2014
Applied Models
LAUFIS-B-1410
MHG-24HWFN1-Q / MOU-24HFN1-Q
MHG-30HWFN1-Q / MOU-30HFN1-Q
MHG-36HWFN1-Q / MOU-36HFN1-Q
MHG-48HWFN1-Q / MOU-48HFN1-Q
MHG-60HWFN1-Q / MOU-60HFN1-Q
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Summary of Contents for Midea MHG-24HWFN1-Q

  • Page 1 Australian Products SUPER DC INVERTER SERIES Service Manual 2014 Applied Models LAUFIS-B-1410 MHG-24HWFN1-Q / MOU-24HFN1-Q MHG-30HWFN1-Q / MOU-30HFN1-Q MHG-36HWFN1-Q / MOU-36HFN1-Q MHG-48HWFN1-Q / MOU-48HFN1-Q MHG-60HWFN1-Q / MOU-60HFN1-Q Contents...
  • Page 3 Contents Part 1 General Information ....................1  Part 2 Indoor Units ....................... 6  Part 3 Outdoor Units ......................34  Part 4 Installation........................ 44  Part 5 Electrical Control System ..................62  ※The specifications, designs, and information in this book are subject to change without prior      notice for product improvement.

  • Page 5: Table Of Contents

    General Information Part 1 General Information 1. Model Lists ....................2 2. External Appearance ................. 3 2.1 Indoor Units ......................3 2.2 Outdoor Units ......................3 3. Nomenclature ..................... 4 4. Features ...................... 5 General Information...

  • Page 6: Model Lists

    Model Lists 1. Model Lists 1.1 Indoor Units R410A (capacity multiplied by 1000Btu/h) Type Function High static pressure duct Cooling and heating ● ● ● ● ● 1.2 Outdoor Units Universal Outdoor unit Model Compressor type Compressor Brand Matched indoor units MOU-24HFN1-Q Rotary GMCC...

  • Page 7: External Appearance

    External Appearance 2. External Appearance 2.1 Indoor Units High static pressure duct 2.2 Outdoor Units Single fan outdoor unit Double fan outdoor unit General Information...

  • Page 8: Nomenclature

    V AHU Type T Duct Type F Console Type U Ceiling & Floor Type H High Static Pressure Duct Type Midea 3.2 Outdoor Unit M O U T- 36 H D N1- R RC4 Energy Efficiency Code Power Supply Q 220~240V,1N, 50HZ...

  • Page 9: Features

    Features Features 4.1. To meet Europe A level, actual EER/COP of new product with BLDC motors of indoor & outdoor unit and   DC compressor will be higher than 3.4. 4.2. Low ambient kit is standard for outdoor units. 4.3. Network control function is standard for the indoor units. 4.4.
  • Page 10 Indoor Units Part 2 Indoor Units High Static Pressure Duct Type ..........7   Indoor Units...
  • Page 11 High Static Pressure Duct Type High Static Pressure Duct Type 1. Features ................. 8   2. Dimensions ..............10   3. Service Space .............. 13   4. Wiring Diagrams ............14   5. Static Pressure ............16   6. Capacity Tales ............. 19  ...

  • Page 12: Features

    Features Features 1.1 High static pressure design  Max static pressure of indoor unit is 200Pa.  The longest distance of air supply is 40m, the max height of air supply is 6.5m.  Specially recommended for spacious and large rooms like large stores and factories. 1.2 Easy maintenance ...
  • Page 13 Features 1.4 Easy cleaning filter (Optional) The filter can be easily removed or installed from the rear side for ease of cleaning.  Indoor Units...

  • Page 14: Dimensions

    Dimensions Dimensions (suspension position) 2-Φ3.2 Φ5 2-Φ3.2 Φ5 NOTE:12 groups all around NOTE:14 groups all around Indoor Units...
  • Page 15 Dimensions 30K-48K (suspension position) 2-Φ3.2 Φ5 2-Φ3.2 Φ5 NOTE:12 groups all around NOTE:14 groups all around Indoor Units...
  • Page 16 Dimensions (suspension position) 2-Φ3.2 Φ5 NOTE:16 groups all around(the same of the air inlet flange) Indoor Units...

  • Page 17: Service Space

    Service Space Service Space Ensure enough space required for installation and maintenance. 500mm or more 600mm or more Indoor unit Maintenance and repair space 600mmx600mm Indoor Units...

  • Page 18: Wiring Diagrams

    Wiring Diagrams Wiring Diagrams MHG-24HWFN1-Q MHG-30HWFN1-Q MHG-36HWFN1-Q(*1)(*2) MHG-48HWFN1-Q MHG-60HWFN1-Q Function Setting Label Indoor Units...
  • Page 19 Wiring Diagrams Indoor Units...

  • Page 20: Static Pressure

    Static Pressure Static Pressure 24,000Btu/h 30,000Btu/h Indoor Units...
  • Page 21 Static Pressure 36,000Btu/h(220070502550) 36,000Btu/h(220070502940) Indoor Units...
  • Page 22 Static Pressure 48,000Btu/h 60,000Btu/h Indoor Units...

  • Page 23: Capacity Tales

    Capacity Tales Capacity Tales 6.1 Cooling Capacity MHG-24HWFN1-Q Hi Fan Speed Cooling Outdoor conditions (DB) Indoor Conditions (kW) 21ºC 28ºC 35ºC 43ºC 50ºC 7.31 6.96 6.60 6.32 5.96 21/15ºC DB/WB 5.41 5.36 5.28 5.31 5.19 Input 1.78 1.94 2.02 2.09 2.17...
  • Page 24 Capacity Tales MHG-30HWFN1-Q Hi Fan Speed Cooling Outdoor conditions (DB) Indoor Conditions (kW) 21ºC 28ºC 35ºC 43ºC 50ºC 8.91 8.48 8.04 7.70 7.27 21/15ºC DB/WB 6.59 6.53 6.44 6.47 6.32 Input 2.17 2.36 2.46 2.54 2.65 9.17 8.74 8.30 7.79 7.35 24/17ºC DB/WB 6.88...
  • Page 25 Capacity Tales MHG-36HWFN1-Q Hi Fan Speed Cooling Outdoor conditions (DB) Indoor Conditions (kW) 21ºC 28ºC 35ºC 43ºC 50ºC 10.82 10.29 9.77 9.35 8.82 21/15ºC DB/WB 8.00 7.92 7.81 7.85 7.67 Input 2.81 3.05 3.18 3.29 3.42 11.13 10.61 10.08 9.45 8.93 24/17ºC DB/WB 8.35...
  • Page 26 Capacity Tales MHG-48HWFN1-Q Hi Fan Speed Cooling Outdoor conditions (DB) Indoor Conditions (kW) 21ºC 28ºC 35ºC 43ºC 50ºC 14.42 13.72 13.02 12.46 11.76 21/15ºC DB/WB 10.67 10.56 10.42 10.47 10.23 Input 3.72 4.04 4.22 4.35 4.53 14.84 14.14 13.44 12.60 11.90 24/17ºC DB/WB 11.13...
  • Page 27 Capacity Tales MHG-60HWFN1-Q Hi Fan Speed Cooling Outdoor conditions (DB) Indoor Conditions (kW) 21ºC 28ºC 35ºC 43ºC 50ºC 18.03 17.15 16.28 15.58 14.70 21/15ºC DB/WB 13.34 13.21 13.02 13.08 12.79 Input 4.69 5.08 5.31 5.48 5.70 18.55 17.68 16.80 15.75 14.88 24/17ºC DB/WB 13.91...

  • Page 28: Heating Capacity

    Capacity Tales 6.2 heating Capacity MHG-24HWFN1-Q Hi Fan Speed Heating Outdoor conditions Indoor Conditions (DB) (kW) 24/18ºC DB/WB 7/6ºC DB/WB 2/1ºC DB/WB -5/-6ºC DB/WB 9.75 7.88 6.45 5.85 15ºC Input 2.25 1.94 1.67 1.56 9.45 7.50 6.08 5.70 20ºC Input 2.46...
  • Page 29 Capacity Tales MHG-30HWFN1-Q Hi Fan Speed Heating Outdoor conditions Indoor Conditions (DB) (kW) 24/18ºC DB/WB 7/6ºC DB/WB 2/1ºC DB/WB -5/-6ºC DB/WB 11.70 9.45 7.74 7.02 15ºC Input 2.86 2.46 2.12 1.98 11.34 9.00 7.29 6.84 20ºC Input 3.12 2.65 2.33 2.14 10.62 8.46...
  • Page 30 Capacity Tales MHG-36HWFN1-Q Hi Fan Speed Heating Outdoor conditions Indoor Conditions (DB) (kW) 24/18ºC DB/WB 7/6ºC DB/WB 2/1ºC DB/WB -5/-6ºC DB/WB 14.30 11.55 9.46 8.58 15ºC Input 3.83 3.30 2.84 2.66 13.86 11.00 8.91 8.36 20ºC Input 4.19 3.55 3.12 2.87 12.98 10.34...
  • Page 31 Capacity Tales MHG-48HWFN1-Q Hi Fan Speed Heating Outdoor conditions Indoor Conditions (DB) (kW) 24/18ºC DB/WB 7/6ºC DB/WB 2/1ºC DB/WB -5/-6ºC DB/WB 19.50 15.75 12.90 11.70 15ºC Input 5.19 4.47 3.85 3.61 18.90 15.00 12.15 11.40 20ºC Input 5.67 4.81 4.23 3.89 17.70 14.10...
  • Page 32 Capacity Tales MHG-60HWFN1-Q Hi Fan Speed Heating Outdoor conditions Indoor Conditions (DB) (kW) 24/18ºC DB/WB 7/6ºC DB/WB 2/1ºC DB/WB -5/-6ºC DB/WB 23.40 18.90 15.48 14.04 15ºC Input 6.26 5.39 4.64 4.35 22.68 18.00 14.58 13.68 20ºC Input 6.84 5.80 5.10 4.70 21.24 16.92...

  • Page 33: Electric Characteristics

    Electric Characteristics 7. Electric Characteristics Indoor Unit Power Supply Model Voltage Min. Max. MHG-24HWFN1-Q 220-240 MHG-30HWFN1-Q 220-240 MHG-36HWFN1-Q 220-240 MHG-48HWFN1-Q 220-240 MHG-60HWFN1-Q 220-240 Note: MFA: Max. Fuse Amps. (A) Indoor Units...

  • Page 34: Sound Levels

    Sound Levels Sound Levels Concealed Duct Type Discharge Suction Duct Duct 1.4m Microphone Noise level dB(A) Model MHG-24HWFN1-Q MHG-30HWFN1-Q MHG-36HWFN1-Q MHG-48HWFN1-Q MHG-60HWFN1-Q Indoor Units...

  • Page 35: Accessories

    Accessories 9. Accessories Name Shape Quantity Tubing & Fittings Soundproof / insulation sheath Drain joint Drainpipe Fittings (for cooling & heating) Seal ring Wired controller Wired controller & Its Frame ， Owner s manual of wired controller Wired controller installation manual Owner ，...

  • Page 36: The Specification Of Power

    The Specification of Power The Specification of Power Model 24000Btu/h 30000Btu/h 36000-48000Btu/h 60000Btu/h Phase 1-phase 1-phase 1-phase 1-phase Frequency and 220-240V, 50Hz 220-240V, 50Hz 220-240V, 50Hz 220-240V, 50Hz Voltage INDOOR UNIT POWER WIRING POWER 3×1.0 3×1.0 3×1.0 3×1.0 CIRCUIT BREAKER ­­...

  • Page 37: Field Wiring

    Field Wiring Field Wiring Indoor Units...

  • Page 38: Outdoor Units

    Outdoor Units Part 3 Outdoor Units 1. Dimensions ....................35 2. Service Space ....................37 3. Piping Diagrams ..................38 4. Wiring Diagrams ..................39 5. Electric Characteristics ................41 6. Operation Limits ..................42 7. Sound Levels ....................43 Outdoor Units...

  • Page 39: Dimensions

    Dimensions 1. Dimensions Unit：mm Model MOU-24HFN1-Q MOU-30HFN1-Q MOU-36HFN1-Q MOJU-36HFN1-Q Outdoor Units...
  • Page 40 Dimensions Unit：mm Model 1369 MOU-48HFN1-Q MOU-60HFN1-Q 1369 Outdoor Units...

  • Page 41: Service Space

    Service Space 2. Service Space (Wall or obstacle) More than 30cm Air inlet More than 60cm More than 30cm Maintain channel Air inlet More than 60cm Air outlet More than 200cm Outdoor Units...

  • Page 42: Piping Diagrams

    Piping Diagrams 3. Piping Diagrams MOU-24HFN1-Q MOU-30HFN1-Q 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 43: Wiring Diagrams

    Wiring Diagrams 4. Wiring Diagrams MOU-24HFN1-Q MOU-30HFN1-Q MOU-36HFN1-Q MOJU-36HFN1-Q Outdoor Units...
  • Page 44 Wiring Diagrams MOU-48HFN1-Q MOU-60HFN1-Q Outdoor Units...

  • Page 45: Electric Characteristics

    Electric Characteristics 5. Electric Characteristics Outdoor Unit Model Voltage Min. Max. MOU-24HFN1-Q 220-240V 198V 254V MOU-30HFN1-Q 220-240V 198V 254V MOU-36HFN1-Q 220-240V 198V 254V MOJU-36HFN1-Q 220-240V 198V 254V MOU-48HFN1-Q 220-240V 198V 254V MOU-60HFN1-Q 220-240V 198V 254V Outdoor Units...

  • Page 46: Operation Limits

    Operation Limits 6. Operation Limits Temperature Cooling operation Heating operation Drying operation Mode Room temperature 17℃～32℃ 0℃～30℃ 17℃～32℃ 0℃～50℃ （-15℃～50℃：For Outdoor temperature -15℃～24℃ 0℃～50℃ the models with low temperature cooling system） CAUTION: 1. If the air conditioner is used beyond the above conditions, certain safety protection features may come into operation and cause the unit to operate abnormally.

  • Page 47: Sound Levels

    Sound Levels 7. Sound Levels Outdoor Unit Microphone 1.0m Note: H= 0.5 × height of outdoor unit Model Noise Level dB(A) MOU-24HFN1-Q MOU-30HFN1-Q MOU-36HFN1-Q MOJU-36HFN1-Q MOU-48HFN1-Q MOU-60HFN1-Q Outdoor Units...

  • Page 48: Installation

    Installation Part 4 Installation 1. Installation Procedure ............. 45 2. Location selection ............46 3. Indoor unit installation ............ 47 4. Outdoor unit installation (Side Discharge Unit) .... 47 5. Refrigerant pipe installation ........... 50 6. Drainage pipe installation ..........51 7.

  • Page 49: Installation Procedure

    Installation Procedure 1. Installation Procedure Indoor unit installation Outdoor unit installation location selection location selection Indoor unit installation Outdoor unit installation Refrigerant pipe Refrigerant pipe installation and insulation installation and insulation Drainage pipe installation Drainage pipe installation and insulation and insulation       Vacuum and leakage checking Additional refrigerant charge Insulation the joint part of refrigerant pipe...

  • Page 50: Location Selection

    Location selection 2. Location selection 2.1 Indoor unit location selection   Where can easily support the indoor unit’s weight.   Where with sufficient space for proper installation.  Where with sufficient space for easy service access.  Where condensate water can be easily drained.  Where can easily connect to outdoor unit.  Where easy for duct installation and air distribution.  Where away from heat source or steam.  Where away from oil gas. ...

  • Page 51: Indoor Unit Installation

    Indoor unit installation 3. Indoor unit installation 3.1 HESP duct indoor unit installation 3.1.1 Service space for indoor unit 500mm or more 600mm or more Indoor unit Maintenance and repair space 600mmx600mm 3.1.2 Bolt pitch Capacity Size of mounted lug (KBtu) 1146 30~48...
  • Page 52 Indoor unit installation 3.1.3 Install the pendant bolt Select the position of installation hooks according to the hook holes positions showed in upper picture. Drill four holes of Ø12mm, 45~50mm deep at the selected positions on the ceiling. Then embed the expansible hooks (fittings).

  • Page 53: Outdoor Unit Installation (Side Discharge Unit)

    Indoor unit installation 4. Outdoor unit installation (Side Discharge Unit) 4.1 Service space for outdoor unit 4.2 Bolt pitch Model 24K/30K Installation...

  • Page 54: Install The Unit

    Refrigerant pipe installation 4.3 Install the Unit Please note the unit's gravity center is not at its physical center, so please be careful when sling it. Never hold the inlet of the outdoor unit to avoid deformation. Do not apply force on fan blade with hands or other objects. Upright installation only. Do not tilt it for more than 5 degree.

  • Page 55: Drainage Pipe Installation

    Drainage pipe installation 5.2.5 Insulate the copper pipe Before test operation, all joint parts should not be thermal insulated.  5.2.6 Flare the pipe  Insert a flare nut into the pipe before flaring the pipe Flare the pipe according to blow table. ...

  • Page 56: Installation Principle

    Drainage pipe installation may cause leakage and water damage. 6.1 Installation principle Ensure at least 1/100 slope of the drainage pipe   Adopt suitable pipe diameter  Adopt nearest condensate water discharge 6.2 Key points of drainage pipe installation 6.2.1 Consider the pipeline route and elevation ...
  • Page 57 Drainage pipe installation PVC50 1440 PVC63 2760 PVC75 5710 PVC90 8280 Note: Adopt PVC40 or bigger pipe to be the main pipe. 6.2.3 Individual design of drainage pipe system  The drainage pipe of air conditioner shall be installed separately with other sewage pipe, rainwater pipe and drainage pipe in building.
  • Page 58 Drainage pipe installation such as high extra static pressure duct unit , the water storage pipe should be set to avoid converse flow or blow water phenomena. Indoor unit More than 50mm Plug More than 25mm Water storage pipe 6.2.7 Lifting pipe setting of indoor unit with water pump (water pump not supplied) ...
  • Page 59 Drainage pipe installation Blowhole Indoor unit Indoor unit Plug Plug 6.2.9 The end of drainage pipe shall not contact with ground directly. 6.3 Drainage test 6.3.1 Water leakage test After finishing the construction of drainage pipe system, fill the pipe with water and keep it for 24 hours to check whether there is leakage at joint section.
  • Page 60 Drainage pipe installation After stopped the air conditioner 3 minutes, check whether there is anything abnormal. If drainage pipes have not been distributed properly, water back-flow may happen. Continuously infusing water until water level alarmed, check whether the drainage pump could discharge water at once.

  • Page 61: Vacuum And Leakage Checking

    Vacuum Drying and Leakage Checking 7. Vacuum and Leakage Checking  Purpose of vacuum Eliminating moisture in system to prevent ice-blockage and copper oxidation.  Ice-blockage can cause abnormal operation and copper­oxide can damage compressor. Eliminating non-condensable gas (air) in system to prevent components oxidizing, pressure fluctuation ...

  • Page 62: Additional Refrigerant Charge

    Additional refrigerant charge If the pressure reached -755mmHg, proceed to pressure leakage test. If it can not reached the value, repeat above process again for 1 hour. Leakage test: After the vacuum degree reaches -755mmHg, stop vacuum drying and keep the pressure for 1 hour.

  • Page 63: Engineering Of Insulation

    Engineering of insulation 9. Engineering of insulation 9.1 Insulation of refrigerant pipe 9.1.1 Operational procedure of refrigerant pipe insulation Cut the suitable pipe → insulation (except joint section) → flare the pipe → piping layout and connection→ vacuum drying → insulate the joint parts 9.1.2 Purpose of refrigerant pipe insulation During operation, temperature of gas pipe and liquid pipe shall be significantly higher or lower than ...

  • Page 64: Engineering Of Electrical Wiring

    Engineering of electrical wiring 9.2 Insulation of drainage pipe 9.2.1 Operational procedure of refrigerant pipe insulation Select the suitable pipe → insulation (except joint section) → piping layout and connection→ drainage test→ insulate the joint parts 9.2.2 Purpose of drainage pipe insulation The temperature of condensate drainage water is very low.

  • Page 65: Test Operation

    Test operation 11. Test operation 11.1 The test operation must be carried out after the entire installation has been completed. 11.2 Please confirm the following points before the test operation.  The indoor unit and outdoor unit are installed properly. ...

  • Page 66: Electrical Control System

    Electrical Control System Part 5 Electrical Control System Electrical Control Function ........63     Troubleshooting ............73     Controller ..............97     Electrical Control System...

  • Page 67: Main Protection

    Electrical Control Function 1. Electrical Control Function 1.1 Definition T1: Indoor room temperature T2: Coil temperature of indoor heat exchanger middle. T2B: Coil temperature of indoor heat exchanger outlet. T3: Coil temperature of condenser T4: Outdoor ambient temperature T5: Compressor discharge temperature 1.2 Main Protection 1.2.1 Time delay at restart for compressor.

  • Page 68: Operation Modes And Functions

    Electrical Control Function 1.3 Operation Modes and Functions 1.3.1 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. (5) Auto fan: High Medium...
  • Page 69 Electrical Control Function High Medium 1.3.2.3 Evaporator low temperature T2 protection. When T2<2 ℃ and lasts for 3 minutes, the indoor has no capacity demand and resume till T2 ≥ 7 ℃ . 1.3.2.4 Condenser high temperature T3 protection When T3≥65 ℃ for 3 seconds, the compressor will shut off. When T3 ＜ 52,the compressor will restart. 1.3.3 Heating Mode 1.3.3.1 Outdoor fan running rules: DC_FAN_SSLOW_SPD_ADD...
  • Page 70 Electrical Control Function T1-Ts- Δ Medium High 1.3.3.3 Defrosting mode： For 24-36K models: Condition of defrosting: T3 ≤ TempEnterDefrost_ADD ℃ and lasts for 40 minutes. Defrosting action： 4-Way valve no longer than 10min Compressor TimeA 10S 30S Indoor fan Outdoor fan PMV running 6 mins with 300P 480P...
  • Page 71 Electrical Control Function For 48-60K models: Condition of defrosting: Time1 3℃ Time2 Time conditions: time1 Time conditions(Meet the following conditions) 1.Running in heating mode 2. T4≥3 ℃ 3. Compressor is on 4. T3≤TempEnterDefrost_ADD ℃ Cleared conditions (Meet any one of the following conditions) 1.
  • Page 72 Electrical Control Function 4-Way valve no longer than 10min Compressor TimeA 10S 30S Indoor fan Outdoor fan PMV running 8 mins with 300P 480P Condition of ending defrosting: If any one of following items is satisfied, defrosting will stop and the machine will turn to normal heating mode.

  • Page 73: Timer Function

    Electrical Control Function 1.3.5 Drying mode Drying mode works the same as cooling mode in low speed. All protections are active and the same as that in cooling mode. 1.3.6 Timer function 1.3.6.1 Timing range is 24 hours. 1.3.6.2 Timer on. The machine will turn on automatically when reaching the setting time. 1.3.6.3 Timer off.

  • Page 74: Drain Pump Control

    Electrical Control Function unit will resume the previous operation setting (not including Swing function) automatically after 3 minutes when power returns. 1.3.9 Drain pump control Adopt the water-level switch to control the action of drain pump. Main action under different condition :( every 5 seconds the system will check the water level one time) 1.
  • Page 75 Electrical Control Function The display value is between 30~120 degree. If the temp. is lower than 30 degree, the digital display tube will show “30”.If the temp. is higher than 99 degree, the digital display tube will Compressor discharge temp.(T5) show single digit and tenth digit.
  • Page 76 Electrical Control Function 1# Indoor unit capacity demand code Actual data(HP) = Display Data / 10 If capacity demand code is higher than 99, the digital display 2# Indoor unit capacity demand code tube will show single digit and tenth digit. For example, the digital display tube shows “5.0” when the capacity demand is 15.

  • Page 77: Troubleshooting

    Troubleshooting 2. Troubleshooting 2.1 Display board 2.1.1 Icon explanation on indoor display board (High Static Pressure Duct) PRE-DEF indicator(cooling and heating type) or fan only indicator(cooling only type) Alarm indicator Timer indicator Infrared signal receiver Operation lamp Display digital tube Temporary button OPERATION TIMER DEF./FAN ALARM MANUAL...
  • Page 78 Troubleshooting 2.4 Solving steps for typical malfunction 2.4.1 For the indoor unit 2.4.1.1 Communication malfunction between indoor and outdoor units.(E1) Communication malfunction between indoor and outdoor units Power off, then restart the unit 2 minutes later. still showing E1? Check whether there’s any interference.
  • Page 79 Troubleshooting 2.4.1.2 Open or short circuit of temperature sensor(E2,E3,E4) Check the connections  between temperature  Correct the connections. sensor and PCB. Are the  connections good? Measure the resistance value  of the sensor via Appendix 1 Is it normal? Replace the sensor. Replace the indoor PCB  2.4.1.3. Outdoor unit malfunction(Ed) Electrical Control System...
  • Page 80 Troubleshooting 2.4.1.4. Indoor EEPROM malfunction(E7) EEPROM: An electrically erasable programmable read-only memory whose contents can be erased and reprogrammed using a pulsed voltage. 2.4.1.5. Water-level alarm malfunction(EE) Electrical Control System...
  • Page 81 Troubleshooting 2.4.1.6. Indoor fan Speed has been out of control. (E8) Electrical Control System...
  • Page 82 Troubleshooting Index 1: 1. Indoor DC fan motor(control chip is inside 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 have problems and need to be replaced.
  • Page 83 Troubleshooting 2.4.4 For the outdoor unit 2.4.4.1. E0 malfunction E0 display Outdoor EEPROM malfunction Power off, then restart the unit 2 minutes later Replace the outdoor main PCB EEPROM: An electrically erasable programmable read-only memory whose contents can be erased and reprogrammed using a pulsed voltage. Electrical Control System...
  • Page 84 Troubleshooting 2.4.4.2 . E2 malfunction The same as E1 in indoor 2.4.4.3. E3 malfunction Electrical Control System...
  • Page 85 Troubleshooting 2.4.4.4. E4 malfunction E4 display Judge 1: Outdoor condenser temp. sensor (T3) is malfunction Check whether the wiring of the  condenser temp. sensor(T3) is  Connect the wiring well broken off Check whether the resistance of  condenser temp. sensorT3) is wrong  Replace condenser temp. sensor(T3) refer to the Appendix 1 Judge 2: Outdoor ambient temp. sensor (T4) is malfunction Check whether the wiring of the  outdoor ambient temperature  Connect the wiring well sensor (T4) is broken off Check whether the resistance of  outdoor ambient temperature  Replace outdoor ambient  sensor (T4) is wrong refer to the  temperature sensor (T4) Appendix 1 Judge 3: Compressor discharge temp. sensor (T5) is malfunction Check whether the wiring of the  compressor discharge temperature  Connect the wiring well sensor (T5) is broken off Check whether the resistance of  Replace compressor discharge  compressor discharge temp. sensor  temperature sensor (T5) (T5) is wrong refer to the Appendix 2 Replace outdoor main PCB...
  • Page 86 Troubleshooting 2.4.4.5. E5 malfunction E5 display Voltage protection Check whether the power Restart the unit when the power voltage is normal. supply gets normal Check the wiring of Measure whether outdoor power wires well or Reconnect it well terminal voltage is normal？ correctly Check the wiring of Measure whether the voltage...
  • Page 87 Troubleshooting 2.4.4.6. E6 malfunction (Only for 36K~60K) E6 display PFC module protection Check whether the connecting line between Connect it tightly, check normal or not main board and the PFC module is connected tightly Measure whether the voltage between P and N is Replace the outdoor main board normal refer to the Appendix 3？...
  • Page 88 Troubleshooting 2.4.4.7. E8 malfunction Same as E8 in indoor 2.4.4.8. P0 malfunction Electrical Control System...
  • Page 89 Troubleshooting 2.4.4.9. P1 malfunction (Only for 30K~60K) Electrical Control System...
  • Page 90 Troubleshooting 2.4.4.10. P2 malfunction (Only for 30K~60K) P2 display Low pressure protection Whether the wiring between the low pressure protector and main control Connect it well board is connected well or correctly Whether the low pressure protector is broken Method: Disconnect the plug. Measure the resistance of the low pressure protector.
  • Page 91 Troubleshooting 2.4.4.11. P3 malfunction P3 display Current protection of compressor The protection occurred in standby Check whether the power Restart the unit when the power voltage is normal. supply gets normal Check the wiring of Measure whether outdoor power wires well or Reconnect it well terminal voltage is normal？...
  • Page 92 Troubleshooting 2.4.4.12. P4 malfunction When compressor discharge temperature is higher than 115°C, the unit will stop, and unit runs again when compressor discharge temperature is lower than 90°C. P4 display Temperature protection of  compressor discharge Check whether the  Check whether the  compressor discharge temp. is  Stop leaking and add refrigerant refrigerant is leak more than 115°C ? Check whether connection is right between compressor discharge temp.
  • Page 93 Troubleshooting 2.4.4.13. P5 malfunction When condenser high temp. is more than 65°C, the unit will stop, and unit runs again when outdoor pipe temp. less than 52°C. P5 display Check the connection  between temperature  Correct the connection High temperature protection of  sensor and PCB. condenser Check whether the condenser temperature is Check whether the Higher than 65°C resistance of condenser...
  • Page 94 Troubleshooting 2.4.4.14. P6 malfunction 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: P6 display IPM module protection Check whether the power voltage...
  • Page 95 Troubleshooting 2.4.4.15. P7 malfunction Electrical Control System...
  • Page 96 Troubleshooting Note: If you replace the indoor PCB, you should short the CN23 and CN5 as picture. CN23 Electrical Control System...
  • Page 97 Troubleshooting Appendix 1 Temperature Sensor Resistance Value Table ( ℃ --K) ℃ 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 11.5000 2.19073 0.59386 96.3423 10.9731 2.11241 0.57683 89.5865 10.4736 2.03732 0.56038...
  • Page 98 Troubleshooting Appendix 2 Unit: ℃---K Discharge temp. sensor table 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 57.37 11.79 3.296 406.7 54.89 11.38 3.203 384.3 52.53 10.99 3.113 363.3 50.28 10.61 3.025 343.6 48.14 10.25...
  • Page 99 With fully active module PFC module PFC module >200VDC >310VDC >370VDC >450VDC Appendix 4 Spec. Indoor code 220070302010 220070401600 220070502550 Indoor MHG-24HWFN1-Q MHG-30HWFN1-Q MHG-36HWFN1-Q Indoor fan motor WZDK150-38GS-W(★) WZDK560-38GS-W(★) WZDK560-38GS-W(★) Indoor code 220070702450 220070802440 220070502940 Indoor MHG-48HWFN1-Q MHG-60HWFN1-Q MHG-36HWFN1-Q Indoor fan motor...
  • Page 100 Troubleshooting Position Resistance Value DA250S2C-30MT TNB306FPGMC-L MNB36FAAMC-L ANB42FBSMT Blue - Red 0.55Ω 0.53Ω 0.44Ω 0.188Ω Blue - Black (20℃) (20℃) (20℃) (20℃) Red - Blue 2.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;...

  • Page 101: Wireless Remote Controller

    Controller 3. Controller 3.1Wireless Remote Controller 3.1.1RG51Q1/BGE General Function for wireless remote controller: Model RG51Q1/BGE Rated voltage 3.0V(2pieces of LR03 7＃ batteries) Min voltage for sending signal of CPU 2.4V Effective receiving distance 8m~11m Operation condition -5~60℃ Electrical Control System...
  • Page 102 Controller Buttons and functions 1. Adjust : Decrease the set temp. Keeping pressing will decrease the temp with 1 ℃ per 0.5s. 2. Adjust : Increase the set temp. Keeping pressing will increase the temp with 1 ℃ per 0.5s. 3.
  • Page 103 Controller 3.1.2 RG51C/E Remote Controller Specifications Model RG51C/E Rated Voltage 3.0V Lowest Voltage of CPU Emitting Signal 2.0V Reaching Distance 8m (when using 3.0 voltage, it can get 11m) Environment Temperature Range -5℃～60℃ Introduction of Function Buttons on the Remote Controller SET TEM PERATURE( C) AU TO COOL...
  • Page 104 Controller angle for each press. 5. HORIZ SWING: Used to stop or start vertical louver movement. 6. FAN SPEED+ MODE : Press the Mode and Fan speed button simultaneously for 2 seconds. The remote controls into faceplate setting state and the LCD shows F2.Press the TEMPUP( ) to control the faceplate up and press the TEMP DOWN( ) to control the faceplate down.

  • Page 105: Wired Remote Controller

    Controller 3.2 Wired Remote Controller 3.2.1 KJR-12B Name and functions of buttons on the wire controller Mode button: When press this button, the operation mode change as the following sequence: AUTO COOL HEAT Remark: For the cooling only model, the heating mode is skipped. Timer on button: Press this button, timer on function is active.
  • Page 106 Controller Reset button (hidden): Use a 1mm stick to press in the little hole , then the current setting is canceled . The wire controllers enter into original state. ON/OFF button: When in off state, press this button, the indicator is on, the wire controller enter into on state, and send setting information to indoor PCB.

  • Page 107: Installation Notice

    Controller Timer: When adjust setting on time or only on time is set, the “ON” is lighted. When adjust setting off time or only off time is set, the” OFF" is lighted. If on and off timer are both set, the “ON” and “OFF” are both lighted.
  • Page 108 Controller NOTE ● The connecting wire should be a little longer as to take away the switch board easily for maintenance. ● The connecting wire should be a little longer as to take away the controller easily for maintenance. Electrical Control System...
  • Page 109 Controller 3.2.2 KJR-120C1/BTF-E Name and functions of buttons on the wire controller Electrical Control System...
  • Page 110 Controller 1. Power button: When in off state, short press this button, the operation lamp lits brightly. When in on state, short press this button, the operation lamp does not lit. If timer on or timer off has been set, it will not cancel this setting.
  • Page 111 Controller Name and function of LCD on the wire controller Installation 1. Connect the female joint of wires group from the mainboard with the male joint of connective wires group. 2. Please connect the other side of connective wires group with the male joint of wires group leads from wire controller Electrical Control System...
  • Page 112 Controller 3. Insert a slot screwdriver into the slots in the lower part of the wire controller (2 places), and remove the upper part of the wire controller. 4.Fasten the back plate of the wire controller  For exposed mounting, fasten the back plate on the wall with the 3 screws (M4×20) and plugs.

  • Page 113: Battery Installation

    Controller 5. Battery installation  Put the battery into the installationsite and make sure the positive side of the battery is in accordance with the positive side of installationsite.  Please set the time corrected on the first time operation. Batteries in the wire controller can timing under power failure which ensure the time keep right.
  • Page 114 Controller B.Shielded wiring 7. Reattach the upper part of the wire controller After adjusting the upper case and then buckle the upper case; avoid clamping the wiring during installation Electrical Control System...

This manual is also suitable for:

Mou-24hfn1-qMhg-30hwfn1-qMou-30hfn1-qMhg-36hwfn1-qMou-36hfn1-qMhg-48hwfn1-q ... Show all

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