Heat Controller VMC12SB-1/VMH12SB-1 service manual Oil return control30kBtu/h Model Heatpump Only

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Part 2 Functions & Controls

5.13 Oil return control(30kBtu/h Model) Heatpump Only

5.13.1 Operating Contion

1)When the continuous running time is over 3hr.(option), oil returning operation is run for 3min. In case of the initial operation, oil returning operation is run, after completing initial operation.

2)After defrost and oil returning operation, the continuous running time is reset.

5.13.2 Operation Process

1)EEV-Full open, Hot gas bypass valve-On

2)Compressor Step-70Hz + Constant Comp. On(Option)

3)Reversing valve-Off(Process of Off/On, follows defrost operating.)

4)Outdoor Fan-Low step

5.14 Oil equalizing control(30kBtu/h Model)

Operating condition :

1)When the continuous inverter compressor running time at under 40 Hz(option) is over 2 hours(option) in 2 com- pressor system, oil restoring operation begins.

2)If compressor operating Hz is below 40 Hz by the safety control, the accumulated time will be cleared and oil restoration does not begin.

3)During this operation,if operating Hz can not be changed by safety control, the oil equalization operation will cease.

Operating process : Raise the operating HZ up to 70,and after 20 sec.(option) recover to the last value.

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Only for training and service purposes

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Contents Heat CONTROLLER, INC Contents Part 1 General Information Be sure not to do Be sure to follow the instruction Safety PrecautionsPart 1 General Information Inspections after Repair Part 2 Functions & Controls Category Function Description Remark List of Functions & ControlsHeating Mode Heatpump Only Basic Mode ControlsCooling Mode Auto changeover operation Heatpump Only Intake air Temp Setting TempHealthy Dehumidification operation Energy saving operation in cooling mode Special Mode ControlsJet Cool operation Jet Heat operation Heatpump OnlyUtility Functions Auto cleaning operationForced operation Heat/pump Model Cooling/only ModelSleep mode Auto control Air volume controlSleep timer operation for cooling cycle Natural Air ControlAuto WindAuto restart Sleep timer operation for heating cycle Heatpump OnlyFive Seconds Stand-by fan Protection Functions & ControlsTwo Minutes Stand-by comp Hot start Heatpump OnlyCompressor Preheating Heatpump Only Outdoor Temperature Running Time secSump Heater Control 9, 12kBtu/h Model Only Heatpump Only 1 9,12kBtu/h ModelAutomatic defrost Heatpump Only 2 18,24,30kBtu/h Model Starting the defrosting operationControl algorithm of defrost completion Defrosting Control AlgorithmInverter Power Relay ControlOverheating Protection Power Module Function Heat sink sensor failure errorHeat sink temperature control CT1 control Total Current Control Over Current ProtectionCT2 control Model KBtu/h Cooling Heating11A 12A 14A 15.5A Discharge Pipe Temp Control DC Peak controlInverter Compressor 18,24,30kBtu/h Model Compressor working Constant Compressor only 30kBtu/h ModelThere can be two situations 12.1 9,12kBtu/h Model Low Ambient control12.2 18, 24, 30kBtu/h Model Model Mode-in Condition Mode-out ConditionOil equalizing control30kBtu/h Model Oil return control30kBtu/h Model Heatpump OnlyOperating Contion Operation ProcessPart 3 Test Run Check before Test Run Test Run Flow chart Test Run DetailCheck before Test Run Start Test Run Flow chartTest Run Detail Pump Down ProcedureSettlement of outdoor unit Evaluation of the performancePart 4 Trouble Shooting Way Valve Liquid Side Way, 3-Way ValvePumping Down ProcedureAir purging of the charge hose Set the 2-way valve to the closed positionEvacuation Gas Charging After Evacuation Mount the valve stem nuts and the service port nutConnect the charge hose to the charging cylinder Purge the air from the charge hoseTrouble analysis Cycle Troubleshooting GuideProcedure Specification Remedy Electronic Parts Troubleshooting GuideTrouble Compressor/Outdoor Fan does not operate 9, 12kBtu/h Model Trouble When indoor Fan does not operate.9~30kBtu/h Model 12kBtu/h Model Error IndicatorSelf-diagnosis Function Outdoor Error 18,24,30kBtu/h Model Indoor ErrorError code Descrition Red Green StatusCode ErrorTroubleshooting Guide9,12kBtu/h Model Description Cause of error Heat-sink Temp. is over Description Cause of error DC Peak Error Description Cause of error Over current Error Description Cause of error Indoor fan is locked Description Cause of error Discharge pipe temp. is Check Point Troubleshooting CH01, CH02, CH06Troubleshooting CH05, CH53 Part Trouble ShootingCopper Comp pipe Troubleshooting CH21Comp Troubleshooting CH21, CH22 Troubleshooting CH23, CH28 Troubleshooting CH24, CH25 ‘B’ Troubleshooting CH26, CH27Troubleshooting CH32, CH33, CH40 Troubleshooting CH41, CH44, CH45, CH46, CH47, CH65 Condenser/Suction Pipe Troubleshooting CH51, CH60Inverter/Constant Troubleshooting CH61, CH62 Heat CONTROLLER, INC

VMC12SB-1/VMH12SB-1, VMC18SB-1/VMH18SB-1, VMC24SB-1/VMH24SB-1, VMC09SB-1/VMH09SB-1, VMC30SB-1/VMH30SB-1 specifications

The Heat Controller VMC30SB-1/VMH30SB-1, VMC09SB-1/VMH09SB-1, VMC24SB-1/VMH24SB-1, VMC18SB-1/VMH18SB-1, and VMC12SB-1/VMH12SB-1 are versatile and efficient HVAC systems designed for residential and commercial applications. These units stand out due to their innovative technologies, user-friendly features, and reliable performance, making them an excellent choice for heating and cooling needs.

One of the most significant features of these units is their Energy Efficiency Rating (EER). Each model has been engineered to provide optimal energy savings, thus minimizing operating costs and environmental impact. Utilizing advanced inverter technology, the systems adjust their cooling and heating output according to the room's demand, ensuring that energy is used only when necessary. This results in quieter operation, less energy consumption, and enhanced comfort.

The VMC and VMH models are equipped with high-performance compressors that provide rapid heating and cooling capabilities. This feature allows users to attain their desired temperatures more quickly compared to traditional systems, ensuring a comfortable environment throughout the year. In addition, the systems maintain consistent temperatures and reduce temperature fluctuations, contributing to a more enjoyable living or working space.

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The compact design of these models allows for easy installation in various spaces, including small apartments or tight commercial setups. They feature an intuitive control panel that offers user-friendly programming options, enabling users to schedule operations according to their daily routines. Additionally, many models include smart connectivity features, allowing remote access and adjustments via mobile apps.

Finally, the aesthetic design of the VMC and VMH series complements modern interior decors, ensuring that these units not only perform well but look good while doing so. With a combination of reliability, energy efficiency, and user-centric features, the Heat Controller VMC and VMH series stand out as an excellent investment for any heating and cooling requirement. These units promise comfort, convenience, and cost-effective operation.
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