Heat Controller A-VMH18DC-1 Service Manual
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Heat Controller A-VMH18DC-1 Service Manual

Inverter flex multi-zone ductless mini split outdoor section
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SERVICE MANUAL
Inverter Flex Multi-Zone
Ductless Mini Split
Outdoor Section
Heat Controller, Inc. • 1900 Wellworth Ave. • Jackson, MI 49203 • (517)787-2100 • www.heatcontroller.com

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  • Page 1 SERVICE MANUAL Inverter Flex Multi-Zone Ductless Mini Split Outdoor Section A-VMH18DC-1 A-VMH27TC-1 A-VMH36QC-1 Heat Controller, Inc. • 1900 Wellworth Ave. • Jackson, MI 49203 • (517)787-2100 • www.heatcontroller.com...

  • Page 2: Table Of Contents

    VMH SerieS Service Manual Heat Controller, Inc. CONTENTS 1.General Information of Outdoor Units ............3 2. Features......................4 3. Dimensions ..................... 5 4. Wiring Diagram ....................6 5. Refrigeration Cycle Diagram ................. 8 6. Indoor unit Combinations ................10 7. Installation Details ..................11 8.

  • Page 3: General Information Of Outdoor Units

    VMH SerieS Heat Controller, Inc. Service Manual 1. General information of Outdoor Units Model name Dimension mm(in) Compressor A-VMH18DC-1 845x320x700(33.3x12.6x27.6) DA130S1C-20FZ A-VMH27TC-1 845x320x700(33.3x12.6x27.6) DA150S1C-20FZ A-VMH36QC-1 990x345x965(39x13.6x38) TNB306FPGMC-L...

  • Page 4: Features

    VMH SerieS Service Manual Heat Controller, Inc. 2．Features Outdoor unit Power relay control Low noise air flow system Hydrophilic aluminum fin The hydrophilic fin is corrosion resistant and improves heating efficiency in heat mode by absorbing the water on its surface and by spreading the water instead of forming water droplets.

  • Page 5: Dimensions

    VMH SerieS Heat Controller, Inc. Service Manual 3. Dimensions mm(in) Model A-VMH18DC-1 845((33.3) 320(12.6) 700(27.6) 908(35.7) 560(22) 335(13.2) A-VMH24TC-1 A-VMH36QC-1 990(39) 345(13.6) 965(38) 1075(42.3) 624(24.6) 366(14.4)

  • Page 6: Wiring Diagram

    VMH SerieS Service Manual Heat Controller, Inc. 4. Wiring Diagram 4.1 A-VMH18DC-1 4.2 A-VMH27TC-1...
  • Page 7 VMH SerieS Heat Controller, Inc. Service Manual 4.3 A-VMH36QC-1...

  • Page 8: Refrigeration Cycle Diagram

    VMH SerieS Service Manual Heat Controller, Inc. 5. Refrigeration Cycle Diagram 8.1 Refrigeration circuit drawing of inverter dual zone: A-VMH18DC-1 INDOOR OUTDOOR EXV A CAPILIARY A LIQUID VALVE A CHECK VALVE EXV B CAPILIARY B LIQUID VALVE B Condenser temp. sensor...

  • Page 9: Service Manual

    VMH SerieS Heat Controller, Inc. Service Manual 8.3 Refrigeration circuit drawing of inverter Quad-zone: A-VMH36QC-1 INDOOR OUTDOOR EXV A CAPILIARY A LIQUID VALVE A EXV B CAPILIARY B LIQUID VALVE B CHECK VALVE EXV C CAPILIARY C LIQUID VALVE C Condenser temp.

  • Page 10: Indoor Unit Combinations

    VMH SerieS Service Manual Heat Controller, Inc. 6. Indoor units combination NOTE: The total capacity of indoor air handlers can not exceed the nominal capacity of the outdoor unit. The minimum quantity of indoor air handlers is one on any outdoor unit, whether it is a dual, tri, or quad zone.

  • Page 11: Installation Details

    VMH SerieS Heat Controller, Inc. Service Manual 7. Installation Details 7.1 Wrench torque sheet for installation Outside diameter Torque Additional tightening torque inch Ф6.35 15(153kgf.cm) 16(163kgf.cm) Ф9.52 25(255kgf.cm) 26(265kgf.cm) Ф12.7 35(357kgf.cm) 36(367kgf.cm) 7.2 Connecting the cables  The power wiring should always follow NEC and local codes, with respect to the unit’s, rating plate. See installation manual for additional information.
  • Page 12 VMH SerieS Service Manual Heat Controller, Inc. 7.4 Installation for the first time Air and moisture in the refrigerant system have undesirable effects as indicated below: ● Pressure in the system rises. ● Operating current rises. ● Cooling or heating efficiency drops.
  • Page 13 VMH SerieS Heat Controller, Inc. Service Manual the pressure can’t achieve -0.1Mpa after pumping 50 minutes, please check if there are some leakage points. Once the meter indicates -0.1mpa, fully close the handle Lo valve of the manifold valve and stop the operation of the vacuum pump.
  • Page 14 VMH SerieS Service Manual Heat Controller, Inc. 7). Replace the valve stems nuts and the service port cap that were previously removed. Be sure to use a torque wrench to tighten the service port cap to a torque of 18N·m.
  • Page 15 VMH SerieS Heat Controller, Inc. Service Manual 6).When the electronic scale displays the proper weight (refer to the table), disconnect the charge hose from the 3-way valve’s service port immediately and turn off the air conditioner before disconnecting the hose.
  • Page 16 VMH SerieS Service Manual Heat Controller, Inc. side), disconnect the charge hose from the 3-way valve’s service port immediately and turn off the air conditioner before disconnecting the hose. 7). Replace the valve stem caps and the service port that were previously removed.
  • Page 17 VMH SerieS Heat Controller, Inc. Service Manual Do this quickly so that the gauge ends up indicating 0.3 to 0.5Mpa. Disconnect the charge set, and tighten the 2-way and 3-way valve’s stem nuts. Use a torque wrench to tighten the 3-way valves service port cap to a torque of 1.8 N.m.
  • Page 18 VMH SerieS Service Manual Heat Controller, Inc. 2-way valve approximately 45° until the gauge indicates 0.3 to 0.5 Mpa. 6). Disconnect the charge set and the charging cylinder, and set the 2-way and 3-way valves to the open position Be sure to use a hexagonal wrench to operate the valve stems.
  • Page 19 VMH SerieS Heat Controller, Inc. Service Manual 2. Refrigerant charging Procedure: 1). Connect the charge hose to the charging cylinder, open the 2-way valve and the 3-way valve Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder.

  • Page 20: Electronic Control Function

    VMH SerieS Service Manual Heat Controller, Inc. 8. Electronic control function 8.1 Abbreviations T1: Indoor ambient temperature T2: Coil temperature of indoor heat exchanger middle. T2B: Coil temperature of indoor heat exchanger outlet. T3: Coil temperature of outdoor heat exchanger...
  • Page 21 VMH SerieS Heat Controller, Inc. Service Manual discharge temp. is 105 degree. If the indoor unit is not connected, the digital display tube will show: “- - “. Inverter current AD data EXV open angle for 1# indoor unit Actual data, divide this number by 8 for actual angle valve is open.
  • Page 22 VMH SerieS Service Manual Heat Controller, Inc. 8.4.4Number of indoor units – displays how many indoor units the outdoor unit is communicating with. Display Quantity of indoor unit 8.4.5 Opening degree of electronic expansion valve: Actual opening degree value equals the display data divided 8 8.5 Protection...

  • Page 23: Cooling Mode

    VMH SerieS Heat Controller, Inc. Service Manual 8.5.4 Compressor current limit protection If the compressor current exceeds the current limit value for 10 seconds, the compressor frequency will be limited per the table below. Cooling mode: Current frequency(Hz) Current limit value(A)
  • Page 24 VMH SerieS Service Manual Heat Controller, Inc. 8.5.5 Indoor / outdoor units communication protection If any indoor unit can not receive the feedback signal from the outdoor unit for 2 minutes, the AC will stop and display the failure code.

  • Page 25: Indoor Mini-Split Error Code Explanations

    VMH SerieS Heat Controller, Inc. Service Manual 9. Troubleshooting 9.1 Indoor Mini-Split error code explanations: Indoor Error Corresponding LED STATUS Code Outdoor Error code Indoor EEPROM malfunction —— Indoor/ outdoor unit communication error —— Zero-crossing signal error —— Indoor fan speed has been out of control ——...

  • Page 26: Outdoor Unit Error Code Explanation

    VMH SerieS Service Manual Heat Controller, Inc. 9.2 Outdoor unit error code explanation: Outdoor Corresponding Indoor Error LED STATUS Mini-Split error code Code: Outdoor EEPROM malfunction Indoor unit A’s coil outlet temp. sensor or connector of sensor is defective Indoor unit B’s coil outlet temp. sensor or connector of sensor is defective Indoor unit C’s coil outlet temp.

  • Page 27: Trouble Shooting

    VMH SerieS Heat Controller, Inc. Service Manual 9.3 Trouble shooting 9.3.1 Indoor unit trouble shooting 9.3.1.1 Indoor EEPROM malfunction Shut off the power supply and turn it on 1 minute later. Is it still displaying the error code? If the EEPROM chip...
  • Page 28 VMH SerieS Service Manual Heat Controller, Inc. 9.3.1.2 Indoor / outdoor units communication error Power off , then Power on the A/C by the Breaker. Did E1 error code turn off? Check wiring on the outdoor and indoor terminal follow the Reconnect the wiring wiring diagram.
  • Page 29 VMH SerieS Heat Controller, Inc. Service Manual Pic 1: Measure the voltage of L2 to S (Vs), is it moving alternately between positive value and negative value? PIC 2, Check the wiring. PIC 3: IPM (For dual/tri/quad-zone) PFC (quad-zone only) PIC4: Main board LED when power on and unit standby.
  • Page 30 VMH SerieS Service Manual Heat Controller, Inc. 9.3.1.3 Zero-crossing signal error Correct the connections. Turn on the unit Check if the connections and Correct the connections. Turn on the when the power supply is within 90-110% of are normal? power supply is normal? unit when the power supply is good.
  • Page 31 VMH SerieS Heat Controller, Inc. Service Manual 9.3.1.5 Indoor fan speed has been out of control(AC fan motor) Shut off the power supply and turn it on 5 seconds The unit operates normally. later.Is it still displaying the error code?
  • Page 32 VMH SerieS Service Manual Heat Controller, Inc. 9.3.1.6 Open or short circuit of temperature sensor. Check the connections between temperature Correct the connections. Correct the connections per sensor and PCB. Are wiring diagram. the connections good? Check the resistance value Replace indoor or outdoor PCB.
  • Page 33 VMH SerieS Heat Controller, Inc. Service Manual 9.3.1.8 Outdoor temp. too low protection(Optional for some models) Check if the outdoor ambient Turn on the unit when outdoor temperature is beyond the normal ambient temperature is in normal operation temperature range.
  • Page 34 VMH SerieS Service Manual Heat Controller, Inc. 9.3.2.2 Voltage protection (ODU E5) Voltage protection Check the voltage of outdoor unit power supply, whether the voltage Check the power supply between L(L1) and N (L2) is about 220~240VAC Check whether the voltage...
  • Page 35 VMH SerieS Heat Controller, Inc. Service Manual 9.3.2.3 Communication malfunction between IPM board and outdoor main board(ODU E7) Communication malfunction between IPM board and outdoor main board Is there at least one LED in lit? the IPM board light? Check the signal wire between...
  • Page 36 VMH SerieS Service Manual Heat Controller, Inc. 9.3.2.4 Temperature protection of compressor discharge (ODU P0) Temperature protection of compressor discharge Check whether the Check whether there is Stop leak and add refrigerant as needed compressor discharge temp. a refrigerant leak is more than 239°F (115°C)?
  • Page 37 VMH SerieS Heat Controller, Inc. Service Manual 9.3.2.5 Temperature protection of compressor top (ODU P0) Temperature protection of compressor top Are all Does the compressor Reconnect and retest. connections correct? operate? Is the unit properly charged? Check whether protector is Replace the protector.
  • Page 38 VMH SerieS Service Manual Heat Controller, Inc. 9.3.2.6 High pressure protection (ODU P1) (Only for A-VMH36QC-1) High pressure protection Is the wiring between the high pressure switch Reconnect it properly and main control board is connected correctly? Is the high pressure...
  • Page 39 VMH SerieS Heat Controller, Inc. Service Manual 9.3.2.7 Low pressure protection (ODU P2) (Only for A-VMH36QC-1) Low pressure protection Is the wiring between the low pressure protector Reconnect it properly and main control board connected correctly? Is the low pressure...
  • Page 40 VMH SerieS Service Manual Heat Controller, Inc. 9.3.2.8 Current protection of compressor (ODU P3) Current protection of compressor Check whether the input current of the power supply wire is more than 12.5A (For 27K, it is 14.5A, For 36K, it is 20A)
  • Page 41 VMH SerieS Heat Controller, Inc. Service Manual 9.3.2.9 IPM module compressor (ODU P4) IPM module protection Regulate it to Check whether the voltage range Check whether the correct, then check of P-N on IPM module is normal? input power supply is whether the system DC277-356V for 18-27KBtu/h;...
  • Page 42 VMH SerieS Service Manual Heat Controller, Inc. 9.3.2.10 High temperature protection of condenser (ODU P6) When outdoor pipe temp. is mroe than 149°F (65°C), the unit will stop, and will run again when outdoor pipe temp. is less than 126°F (52°C).
  • Page 43 VMH SerieS Heat Controller, Inc. Service Manual 9.3.2.11 High PFC module protection (ODU P6) (Only for A-VMH36QC-1) PFC module protecton Check whether the connecting line Connect it tightly, between main board and the PFC check normal or not module is connected tightly...
  • Page 44 VMH SerieS Service Manual Heat Controller, Inc. Appendix 1 Temperature Sensor Resistance Value Table (℃--K) Use appendix 4 to convert °C to °F. K Ohm K Ohm K Ohm K Ohm ℃ ℃ ℃ ℃ 115.266 12.6431 2.35774 0.62973 108.146 12.0561...
  • Page 45 VMH SerieS Heat Controller, Inc. Service Manual Appendix 2 °C 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...
  • Page 46 VMH SerieS Service Manual Heat Controller, Inc. Appendix 3 1. Reference voltage data: Rectifier : Input :220-230V(AC), output :310V(DC) Inverter module: U,V, W 3ph. Result 60-150V(AC) 60-150V(AC) 60-150V(AC) DC 310V 2. Check the Diode Bridge component ( In wiring diagram, rectifier) Remark: If this part is abnormal, the LED will not light.
  • Page 47 VMH SerieS Heat Controller, Inc. Service Manual Appendix 4:...
  • Page 48 VMH SerieS Service Manual Heat Controller, Inc. Appendix 5: Spec. Outdoor unit Model Compressor DA130S1C-20FZ DA150S1C-20FZ TNB306FPGMC-L Outdoor fan motor YDK70-6FB YDK70-6FB YDK180-8GB Indoor unit Model 9k Mini-Split 12k Mini-Split 18k Mini-Split Indoor fan motor RPG20B RPG20B RPG28H Model 12k Cassette...
  • Page 49 VMH SerieS Heat Controller, Inc. Service Manual Fan Motor. Measure the resistance value of each winding by using the tester. Position Resistance Value YDK70-6FB YDK180-8GB YSK27-4G YSK68-4B YDK45-6B YSK25-6L 56Ω±8% 24.5Ω±8% 317Ω±8% 145Ω±8% 345Ω±8% 627Ω±8% Black - Red (20℃) (20℃) (20℃)
  • Page 50 10-2012 04/2009...

This manual is also suitable for:

A-vmh27tc-1A-vmh36qc-1

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