Heat Controller VMC12SB-1/VMH12SB-1 service manual Cycle Troubleshooting Guide, Trouble analysis

Page 39

Part 4 Trouble Shooting

5. CycleTroubleshootingGuide

Trouble analysis

1. Check temperature difference between intake and discharge air, and operating current.

Temp. Difference

Operating Current

 

Temp. difference

: approx. 0°C(1°F)

 

Current

: less than 80% of

 

 

 

rated current

 

 

 

 

 

 

 

Temp. difference

: approx. 8°C(16°F)

 

Current

: less than 80% of

 

 

rated current

 

 

 

 

 

 

 

Temp. difference

: less than 8°C(16°F)

 

Current

: near the rated

 

 

 

current

 

 

 

All amount of refrigerant leaked out. Check refrigeration cycle.

Refrigerant leakage

Clog of refrigeration cycle

Defective compressor

Excessive amount of refrigerant

Temp. difference : over 8°C(16°F)

Normal

NOTICE

Temperature difference between intake and discharge air depends on room air humidity. When the room air humidity is relatively higher, temperature difference is smaller. When the room air humidity is relatively lower temperature difference is larger.

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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 & ControlsBasic Mode Controls Cooling ModeHeating Mode Heatpump Only Intake air Temp Setting Temp Healthy Dehumidification operationAuto changeover operation Heatpump Only Jet Heat operation Heatpump Only Special Mode ControlsEnergy saving operation in cooling mode Jet Cool operationHeat/pump Model Cooling/only Model Auto cleaning operationUtility Functions Forced operationNatural Air ControlAuto Wind Air volume controlSleep mode Auto control Sleep timer operation for cooling cycleAuto restart Sleep timer operation for heating cycle Heatpump OnlyHot start Heatpump Only Protection Functions & ControlsFive Seconds Stand-by fan Two Minutes Stand-by comp1 9,12kBtu/h Model Outdoor Temperature Running Time secCompressor Preheating Heatpump Only Sump Heater Control 9, 12kBtu/h Model Only Heatpump OnlyAutomatic 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 Heat sink sensor failure error Heat sink temperature controlFunction Model KBtu/h Cooling Heating Total Current Control Over Current ProtectionCT1 control CT2 control11A 12A 14A 15.5A Discharge Pipe Temp Control DC Peak controlInverter Compressor 18,24,30kBtu/h Model Constant Compressor only 30kBtu/h Model There can be two situationsCompressor working Model Mode-in Condition Mode-out Condition Low Ambient control12.1 9,12kBtu/h Model 12.2 18, 24, 30kBtu/h ModelOperation Process Oil return control30kBtu/h Model Heatpump OnlyOil equalizing control30kBtu/h Model Operating ContionPart 3 Test Run Check before Test Run Test Run Flow chart Test Run DetailCheck before Test Run Start Test Run Flow chartEvaluation of the performance Pump Down ProcedureTest Run Detail Settlement of outdoor unitPart 4 Trouble Shooting Way Valve Liquid Side Way, 3-Way ValveSet the 2-way valve to the closed position ProcedurePumping Down Air purging of the charge hoseEvacuation Purge the air from the charge hose Mount the valve stem nuts and the service port nutGas Charging After Evacuation Connect the charge hose to the charging cylinderTrouble 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 Error Indicator Self-diagnosis Function12kBtu/h Model Red Green Status 18,24,30kBtu/h Model Indoor ErrorOutdoor Error Error code DescritionCode 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 ShootingTroubleshooting CH21 CompCopper Comp pipe Troubleshooting CH21, CH22 Troubleshooting CH23, CH28 Troubleshooting CH24, CH25 ‘B’ Troubleshooting CH26, CH27Troubleshooting CH32, CH33, CH40 Troubleshooting CH41, CH44, CH45, CH46, CH47, CH65 Troubleshooting CH51, CH60 Inverter/ConstantCondenser/Suction Pipe 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.

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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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