Heat Controller VMH24SC-1, VMH12SC-1, VMH09SC-1, VMH18SC-1 service manual  Caution

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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 electric shock.

Do not open the inlet grill of the product during operation. (Do not touch the electrostatic filter, if the unit is so equipped.)

There is risk of physical injury, electric shock, or product failure.

When the product is soaked (flooded or submerged), contact an your dealer.

There is risk of fire or electric shock.

Use caution that water could not enter the product.

There is risk of fire, electric shock, or product damage.

Ventilate the product from time to time when operating it together with a stove, etc.

There is risk of fire or electric shock.

Turn the main power off when cleaning or maintaining the product.

There is risk of electric shock.

When the product is not be used for a long time, disconnect the power supply plug or turn off the breaker.

There is risk of product damage or failure, or unintended operation.

Take care to ensure that nobody can step on or fall onto the outdoor unit.

This could result in personal injury and product damage.

CAUTION

Always check for gas (refrigerant) leakage after installation or repair of product.

Low refrigerant levels may cause failure of product.

Install the drain hose to ensure that water is drained away properly.

A bad connection may cause water leakage.

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Contents Inverter Single Zone Ductless Mini Split Heat Pump Contents  Installation PrecautionSafety Precaution  For installation, always contact the dealer  Caution  Operational  Keep level even when installing the product Use two or more people to lift and transport the product  Do not block the inlet or outlet of air flow Do not drink the water drained from the product Anti-freeze protection in cooling FunctionOutdoor unit Compressor delay Indoor Unit DimensionOutdoor Unit Model Dimension mmIndoor Outdoor Refrigerant Cycle DiagramWiring Diagrams VMH09SC-1 A-VMH12SC-1 VMH18SC-1 Installation details Single Zone V Series Inverter System Pipe length and the elevationSystem Evacuation and Charging Pressure Test & EvacuationOperation characteristics Display function Electronic functionAbbreviation Main Protection Fan only mode Preheat modeOperation Modes and Functions Preheat terminationCooling Mode Compressor running rules Model Current Frequency decreases HoldsIndoor fan running rules Condenser high temperature T3 protectionOutdoor fan rules Heating Mode Compressor running rules Evaporator low temperature T2 protectionT1-Ts-ΔT +5.0 +4.5 +3.5 +3.0 +2.5 +2.0 +1.5 +1.0 +0.5 Outdoor fan running rules I1HEAT I2HEAT I3HEATUnit TEL0 TEL1 VMH09SC-1 Indoor fan rulesVMH12SC-1 VMH18SC-1Defrost mode: Defrost Actions For 9K and 12K unit For 18K and 24K unit Auto-mode High evaporator coil temp.T2 protectionForced operation function Dehumidify modeSleep function mode Timer functionAutomatic front panel function Ionizer Clean Air functionAuto-Restart function Safety TroubleshootingEeprom parameter error diagnosis and solution Indoor Unit Error DisplayDiagnosis and Solution VMH Series E3 Indoor or E7 Outdoor Igbt over current protection diagnosis and solution VMH Series Inverter compressor drive error diagnosis and solution 29 P3 Error Low Ambient ProtectionPosition Resistance Value Key parts checkingVMH Series Some frequently-used R-T data for T1, T2, T3 and T4 sensor 2012