Table of Contents
Troubleshooting
Related Manuals for Heat Controller VMH09SC-1
Summary of Contents for Heat Controller VMH09SC-1
- Page 1 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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Page 2: Table Of Contents
VMH SerieS Service Manual Heat Controller, Inc. CONTENTS 1.Safety Precautions ..........................3 2. Functions ............................8 3. Dimensions ............................10 3.1 Indoor Unit ..........................10 3.2 Outdoor Unit ........................... 11 4. Refrigerant Cycle Diagram ......................12 5. Wiring Diagrams ..........................13 5.1 Indoor Unit .......................... -
Page 3: Safety Precautions
VMH SerieS Heat Controller, Inc. 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. - Page 4 VMH SerieS Service Manual 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.
- Page 5 VMH SerieS Heat Controller, Inc. 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 ...
- Page 6 VMH SerieS Service Manual 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.
- Page 7 VMH SerieS Heat Controller, Inc. 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 ...
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Page 8: Functions
VMH SerieS Service Manual 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... - Page 9 VMH SerieS Heat Controller, Inc. 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 Energized in the heating mode except when in defrost.
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Page 10: Dimensions
VMH SerieS Service Manual Heat Controller, Inc. 3. Dimension 3.1 Indoor Unit Dimension (mm) Model B-VMH09SC B-VMH12SC (33.3in) (11.3in) (6.5in) B-VMH18SC 1080 B-VMH24SC (42.5in) (12.6in) (7.9in) -
Page 11: Outdoor Unit
VMH SerieS Heat Controller, Inc. Service Manual 3.2 Outdoor Unit Dimension (mm) Model A-VMH09SC A-VMH12SC (29.9in) (11.2in) (23.2in) (32.4in) (20.9in) (11.4in) A-VMH18SC (33.3in) (13.2in) (27.4in) (36.1in) (22.0in) (13.2in) A-VMH24SC (35.2in) (13.0in) (33.9in) (38.4in) (23.2in) (13.1in) -
Page 12: Refrigerant Cycle Diagram
VMH SerieS Service Manual 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 REVERSING VALVE 3-WAY VALVE (Heating Model only) ACCUMULATOR... -
Page 13: Wiring Diagrams
VMH SerieS Heat Controller, Inc. Service Manual 5. Wiring Diagrams: 5.1 Indoor Units B-VMH09SC-1 B-VMH12SC-1 B-VMH18SC-1 B-VMH24SC-1... -
Page 14: Outdoor Unit
VMH SerieS Service Manual Heat Controller, Inc. 5.2 Outdoor Unit A-VMH09SC-1 A-VMH12SC-1 A-VMH18SC-1... -
Page 15: Installation Details
VMH SerieS Heat Controller, Inc. 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. -
Page 16: Pipe Length And Elevation
VMH SerieS Service Manual Heat Controller, Inc. 6.2 Pipe length and the elevation: 1. Single Zone “V” Series Inverter System: Capacity Pipe Size Standard Total Additional Btu/h Liquid Length Elevation Line Length (ft) Refrigerant (in) (in) (ft) (ft) Min. Max. -
Page 17: Pressure Test And Evacuation
VMH SerieS Heat Controller, Inc. 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. -
Page 18: Operation Characteristics
VMH SerieS Service Manual 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. -
Page 19: Electronic Functions
VMH SerieS Heat Controller, Inc. 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. -
Page 20: Main Protection
VMH SerieS Service Manual Heat Controller, Inc. 8.3 Main Protection 8.3.1 Three Minute Time Delay at restart for compressor. 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. -
Page 21: Operation Modes And Functions
VMH SerieS Heat Controller, Inc. Service Manual Preheat mode: • With the compressor off, a small amount of current flows through the windings of the compressor heating the crankcase. Preheat termination: • If T4＞41°F/5°C or user turns on the machine and compressor runs, preheating function will stop. - Page 22 VMH SerieS Service Manual Heat Controller, Inc. 8.4.2 Cooling Mode 8.4.2.1 Compressor running rules: The operating frequency of compressor after starting submits to following rule. °F °C (45) (43) (40) (38) (30) (28) (22) (20) If users switch on A/C by remote controller, the compressor will run at the Fmax frequency for 7 minutes according to outdoor ambient temp.
- Page 23 VMH SerieS Heat Controller, Inc. Service Manual Note: When T1-Ts stays in the same temp. zone for 3 minutes, the compressor will run as follows: A~E: Increases the frequency to level F8. F: Maintains the current frequency. G: Decreases the frequency to the lower level F1.
- Page 24 VMH SerieS Service Manual Heat Controller, Inc. 8.4.2.2 Outdoor fan rules: Outdoor fan and compressor start at the same time, outdoor fan stops 30s after the compressor stops. The outdoor fan has two speeds, and is controlled by T4 as follows: °F...
- Page 25 VMH SerieS Heat Controller, Inc. Service Manual 8.4.2.5 Evaporator low temperature T2 protection. When T2<32°F/0°C, the compressor will stop and restart when T2>41°F/5°C. When 32°F/0°C≤T2<39°F/4°C, the compressor frequency is limited and decreases to the lower level every minute until stop the compressor stops.
- Page 26 VMH SerieS Service Manual Heat Controller, Inc. After A/C starts up, the compressor will run at the Fmax frequency for 7 minutes according to outdoor ambient temp. During the 7 minutes, frequency limitation is active. 7 minutes later, compressor running frequency will be controlled as below: T1-Ts-ΔT...
- Page 27 VMH SerieS Heat Controller, Inc. Service Manual Meanwhile, the compressor running frequency is limited by the current. Frequency decreases Frequency holds If the current increases more than I2HEAT, the frequency will decrease automatically, if the current raises to over I3HEAT,, the compressor will stop and restart 3min later.
- Page 28 VMH SerieS Service Manual Heat Controller, Inc. 8.4.3.3 Indoor fan rules: The indoor fan speed can be selected as high, medium, low and auto, the anti-cold-wind function has the priority. If set temperature is reached, the indoor fan switches to lowest speed, the anti-cold wind function has priority.
- Page 29 VMH SerieS Heat Controller, Inc. Service Manual Auto fan action in heating mode. T1-Ts-ΔT °F °C 5° (2.5) 4° (2.0) 3° (1.5) 2° (1.0) 8.4.3.4 Defrost mode： Conditions of defrost: When the unit is running, if any one of the following conditions is satisfied, the unit starts defrost: 1 .Defrost is available after 40 minutes of run time if T3 (Condenser coil temperature) is＜37°F/3°C and...
- Page 30 VMH SerieS Service Manual Heat Controller, Inc. Defrost Actions: For 9K and 12K unit For 18K and 24K unit...
- Page 31 VMH SerieS Heat Controller, Inc. Service Manual 8.4.3.5 High evaporator coil temp.T2 protection: (1) T2>TEH2 compressor running frequency decreases to the lower level every 20s. If the frequency decreased to F2 and the T2 still over TEH2 for 3 minutes, the compressor will stop. If T2 deceased to lower than 118°F/48°C, or 118°F/48°C <T2<...
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Page 32: Dehumidify Mode
VMH SerieS Service Manual Heat Controller, Inc. 8.4.5 Dehumidify mode 8.4.5.1 Indoor fan speed is fixed in breeze and can’t be changed. The louver angle is the same as in cooling mode. 8.4.5.2 Compressor running rules T1-Ts °F °C 36.5 (2.5) - Page 33 VMH SerieS Heat Controller, Inc. Service Manual 8.4.6.2 In forced operation mode, all general protections and remote control functions are available. 8.4.6.3 Operation rules: Forced cooling mode: The compressor runs at F2 frequency and indoor fan runs as breeze. After running for 30 minutes. the machine will turn to auto mode at 75°F/24°C set temperature.
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Page 34: Ionizer Function
VMH SerieS Service Manual Heat Controller, Inc. 8.4.8.3 Timer setting is available 8.4.8.4 When user uses timer off function in sleep mode (or sleep function in timer off mode), if the timing is less than 7 hours, sleep function will be cancelled when the set time reached. If the timing is more than 7 hours, the machine will not stop until it reaches the set time in sleep mode. -
Page 35: Troubleshooting
VMH SerieS Heat Controller, Inc. Service Manual 8.4.11.2 After the A/C is turned on, the Clean Air function is switched on when the A/C receives FRESH CODE the first time, and ionizer is switched off when the A/C receives the CODE again. 8.4.11.3 After starting the Clean Air function, the ionizer will work only when the indoor fan motor is running. -
Page 36: Indoor Unit Error Display
VMH SerieS Service Manual Heat Controller, Inc. 9. Troubleshooting 9.1 Indoor Unit Error Display Display LED STATUS EEPROM parameter error Indoor / outdoor units communication protection Zero-crossing signal error Indoor fan speed out of control Open or short circuit of outdoor temperature sensor... - Page 37 VMH SerieS Heat Controller, Inc. Service Manual 9.2.2 Indoor unit and outdoor unit communication protection error diagnosis and solution Turn off the power supply, after 1 minute, reapply the power, turn on the unit with remote controller Does E1 code clear Check the wiring between indoor and outdoor unit.
- Page 38 VMH SerieS Service Manual Heat Controller, Inc. 9.2.3 Zero crossing check resistance or inverter compressor, it is .7Ω error Alarm signal when the main chip can’t detect over-zero signal. When such failure occurs, the main control board must have fault.
- Page 39 VMH SerieS Heat Controller, Inc. Service Manual E5 & E6 9.2.5 Open or short circuit of temperature sensor diagnosis and solution Check the connections between the sensors and the PCB. Are the connections good? Replace the outdoor or Replace the sensor and check if...
- Page 40 VMH SerieS Service Manual Heat Controller, Inc. 9.2.7 Over voltage or too low voltage protection diagnosis and solution Is the power supply good? Make sure the power supply is normal. Replace the outdoor e-box. 9.2.8 High temperature protection of compressor top diagnosis and solution...
- Page 41 VMH SerieS Heat Controller, Inc. Service Manual 9.29 P3 ERROR – Low Ambient Protection If the outdoor temperature remains at 5°F(-15°C) for an hour, the compressor will turn off and the error code “P3” will be displayed on the indoor unit. Once the compressor has been off for at least an hour and the temperature outside is equal to or greater than 10.4°F(-12°C) for at least ten minutes, the system will...
- Page 42 VMH SerieS Service Manual Heat Controller, Inc. Key parts checking. 8.3.1. Compressor checking (Model: DA108X1C-20FZ3) Measure the resistance value of each winding by using the multi-meter. Position Resistance Value Blue - Red 0.71Ω Blue - Black (20℃) Red - Blue Step Motor (Model: MP2835T) Measure the resistance value of each winding by using the multi-meter.
- Page 43 VMH SerieS Heat Controller, Inc. Service Manual 8.3.1. Compressor checking (Model: DA150S1C-20FZ) Measure the resistance value of each winding by using the multi-meter. Position Resistance Value Blue - Red 0.95Ω Blue - Black (20℃) Red - Blue Outdoor Fan Motor (Model: YDK53-6FB) Measure the resistance value of each winding by using the multi-meter.
- Page 44 VMH SerieS Service Manual Heat Controller, Inc. Temperature Sensors. Room temp.(T1) sensor, Indoor coil temp.(T2) sensor, Outdoor coil temp.(T3) sensor, Outdoor ambient temp.(T4) sensor, Compressor exhaust temp.(Te) sensor. Measure the resistance value of each winding by using the multi-meter. Some frequently-used R-T data for Te sensor: Temperature (0°F)
- Page 45 VMH SerieS Heat Controller, Inc. Service Manual 3-2012 04/2009...