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SERVICE MANUAL
Inverter Single Zone
Ductless Mini Split Heat Pump
VMH Series Version C
VMH09SC-1
VMH12SC-1
VMH18SC-1
VMH24SC-1
Heat Controller, Inc. • 1900 Wellworth Ave. • Jackson, MI 49203 • (517)787-2100 • www.heatcontroller.com
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Service Manual VMH SerieS Heat Controller, Inc. CONTENTS 1.Safety Precautions ............................................................................................................................. 3 2. Functions ........................................................................................................................................... 8 3. Dimensions .............................................................................................................................
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Heat Controller, Inc. VMH SerieS Service Manual 1. Precaution 1.1 Safety Precaution To prevent injury to the user or other people and property damage, the following instructions must be followed. Incorrect operation due to ignoring instruction will cause harm or damage. Before service unit, be sure to read this service manual at first. 1.2 Warning Installation Do not use a defective or underrated circuit breaker. Use this appliance on a dedicated circuit. There is risk o
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Service Manual VMH SerieS Heat Controller, Inc. Sharp edges could cause injury, be especially careful of the case edges and the fins on the condenser and evaporator. For installation, always contact the dealer. There is risk of fire, electric shock, explosion, or injury. Do not install the product on a defective installation stand. It may cause injury, accident, or damage to the product. Be sure the installation area does not deteriorate with age. If the base collapses, the air co
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Heat Controller, Inc. VMH SerieS Service Manual Do not use the telephone or turn switches on or off. There is risk of explosion or fire. If strange sounds, or small or smoke comes from product. Turn the breaker off or disconnect the power supply cable. There is risk of electric shock or fire. Stop operation and close the window in storm or hurricane. If possible, remove the product from the window before the hurricane arrives. There is risk of property damage, failure of product, or
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Service Manual VMH SerieS Heat Controller, Inc. Keep level even when installing the product. To avoid vibration of water leakage. Use two or more people to lift and transport the product. Avoid personal injury. Do not install the product where it will be exposed to sea wind (salt spray) directly. It may cause corrosion on the product. Corrosion, particularly on the condenser and evaporator fins, could cause product malfunction or inefficient operation. Operational Do not
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Heat Controller, Inc. VMH SerieS Service Manual A dirty filter reduces the efficiency of the air conditioner and could cause product malfunction or damage. Do not insert hands or other object through air inlet or outlet while the product is operated. There are sharp and moving parts that could cause personal injury. Do not drink the water drained from the product. It is not sanitary could cause serious health issues. Use a firm stool or ladder when cleaning or maintaining the prod
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Service Manual VMH SerieS Heat Controller, Inc. 2. Function Indoor unit Operation by remote controller Sensing room temperature Room temperature sensor Pipe temperature sensor Room temperature control Maintains the room temperature according to the set temperature Indoor golden fin Anti-freeze protection in cooling Prevents condensate from freezing on evaporator by sensing the evaporator pipe temperature Ionizer Indoor golden fin in cooling mode
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Heat Controller, Inc. VMH SerieS Service Manual Outdoor unit Compressor delay 3 minute time delay between ON/OFF operation. Low noise air flow system Bird tail propeller fan makes the outdoor unit run more quietly. Hydrophilic aluminum fin 4 way valve control E nergized in the heating mode except when in defrost. Anti-rust cabinet Made from electrolytic zinc steel and anti-rust coated components. Valve protection cover P rotects the valves and p
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Service Manual VMH SerieS Heat Controller, Inc. 3. Dimension 3.1 Indoor Unit Dimension (mm) Model W H D B-VMH09SC 845 286 165 B-VMH12SC (33.3in) (11.3in) (6.5in) B-VMH18SC 1080 320 200 B-VMH24SC (42.5in) (12.6in) (7.9in) 10 9
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Heat Controller, Inc. VMH SerieS Service Manual 3.2 Outdoor Unit Dimension (mm) Model W D H W1 A B A-VMH09SC 760 285 590 823 530 290 A-VMH12SC (29.9in) (11.2in) (23.2in) (32.4in) (20.9in) (11.4in) 845 335 695 918 560 335 A-VMH18SC (33.3in) (13.2in) (27.4in) (36.1in) (22.0in) (13.2in) 895 330 860 975 590 333 A-VMH24SC (35.2in) (13.0in) (33.9in) (38.4in) (23.2in) (13.1in) 11 10
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Service Manual VMH SerieS Heat Controller, Inc. 4. Refrigerant Cycle Diagram: INDOOR OUTDOOR CHECK VALVE LIQUID SIDE (Heating Model only) 2-WAY VALVE CAPILIARY TUBE HEAT HEAT EXCHANGE EXCHANGE (EVAPORATOR) (CONDENSER) GAS SIDE 3-WAY VALVE REVERSING VALVE (Heating Model only) ACCUMULATOR COOLING COMPRESSOR HEATING 12 11
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Heat Controller, Inc. VMH SerieS Service Manual 5. Wiring Diagrams: 5.1 Indoor Units B-VMH09SC-1 B-VMH12SC-1 B-VMH18SC-1 B-VMH24SC-1 12 13
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Service Manual VMH SerieS Heat Controller, Inc. 5.2 Outdoor Unit A-VMH09SC-1 A-VMH12SC-1 A-VMH18SC-1 14 13
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Heat Controller, Inc. VMH SerieS Service Manual A-VMH24SC-1 6. Installation details: 6.1 Power Wiring • Consult local building codes, NEC (National Electrical Code) or CEC (Canadian Electrical Code) for special requirements. Connection Cable: Voltage drop on the connecting cable should be kept to a minimum. The operating voltage will vary between – 24V to +24V DC. Use cable size listed below: MODEL MIN CKT AMP AWG (min) SIZE POWER SOURCE MAX FUSE/CB Connecting Cable** AM
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Service Manual VMH SerieS Heat Controller, Inc. 6.2 Pipe length and the elevation: 1. Single Zone “V” Series Inverter System: Capacity Pipe Size Standard Max Total Additional Btu/h Gas Liquid Length A Elevation Line Length (ft) A Refrigerant B (in) (in) (ft) (ft) Min. Max. oz/ft 9k 3/8 1/4 *16.5 26 10 65.5 .2 12k 1/2 1/4 *16.5 26 10 65.5 .2 18k 1/2 1/4 *16.5 32 10 82 .2 24k 5/8 3/8 *16.5 32 10 82 .4 Refrigerant Charge (oz) Unit Model # Heat Pump VMH09SC 38.8 oz. VMH12
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Heat Controller, Inc. VMH SerieS Service Manual 6.3 Pressure Test & Evacuation Air and moisture in the refrigerant system have undesirable effects as below: ● Pressure in the system rises. ● Operating current rises. ● Cooling or heating efficiency drops. ● Moisture in the refrigerant circuit may freeze and block capillary tubing. ● Refrigerant lines and indoor coil should be evacuated using the recommended deep vacuum method of 500 microns. The alternate triple evacuation method may b
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Service Manual VMH SerieS Heat Controller, Inc. 2. Deep Vacuum Method The deep vacuum method requires a vacuum pump capable of pulling a vacuum of 500 microns and a vacuum of 500 microns and vacuum gage capable of accurately measuring the vacuum depth. The deep vacuum method is the most positive way of assuring a system is free of air and liquid water. 1. Vacuum pressure should pull down below 500 microns in 2 minutes. 2. Evacuate system for 30 minutes. 3. Shut valve to vacuum pump
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Heat Controller, Inc. VMH SerieS Service Manual 8. Electronic function 8.1 Abbreviation T1: Indoor room temperature T2: Coil temperature of evaporator T3: Coil temperature of condenser T4: Outdoor ambient temperature T5: Compressor discharge temperature TS: Preset temperature. 8.2 Display function 8.2.1 Icon explanation on indoor display board. TIMER display Illuminated during Timer operation. CLEAN AIR display(optional) Illuminated when Ionizer is activated. TURBO o
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Service Manual VMH SerieS Heat Controller, Inc. 8.3 Main Protection 8.3.1 Three Minute Time Delay at restart for compressor. st 1 minute delay for 1 time start-up and 3 minute delay for others. 8.3.2 Temperature protection of compressor top. Protector cuts off compressor for 30 seconds and restarts after 3 minute delay. 8.3.3 Temperature protection of compressor discharge. When the compressor discharge temperature increases, the compressor frequency will be limited as indicated below:
