Heat Controller VMH12SC-1, VMH24SC-1, VMH09SC-1  For installation, always contact the dealer

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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 conditioner could fall with it, causing property damage, product failure,

and personal injury.

Do not let the air conditioner run for a long time when the humidity is very high and a door or a window is left open.

Moisture may condense and wet or damage furniture.

Take care to ensure that power cable can not be pulled out or damaged during operation.

There is risk of fire or electric shock.

Do not place anything on the power cable.

There is risk of fire or electric shock.

Do not plug or unplug the power supply plug during operation.

There is risk of fire or electric shock.

Do not touch (operation) the product with wet hands.

There is risk of fire or electric shock.

Do not place a heater or other appliance near the power cable.

There is risk of fire and electric shock.

Do not allow water to run into electric parts.

It may cause fire, failure of the product, or electric shock.

Do not store or use flammable gas or combustible near the product.

There is risk of fire or failure of product.

Do not use the product in a tightly closed space for a long time.

Oxygen deficiency could occur.

When flammable gas leaks, turn off the gas and open a window for ventilation before turn the product on.

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Contents Inverter Single Zone Ductless Mini Split Heat Pump Contents Safety Precaution Precaution Installation  For installation, always contact the dealer  Caution  Keep level even when installing the product  Operational 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 Function Anti-freeze protection in coolingOutdoor unit Compressor delay Dimension Indoor UnitModel Dimension mm Outdoor UnitRefrigerant Cycle Diagram Indoor OutdoorWiring Diagrams VMH09SC-1 A-VMH12SC-1 VMH18SC-1 Installation details Pipe length and the elevation Single Zone V Series Inverter SystemPressure Test & Evacuation System Evacuation and ChargingOperation characteristics Abbreviation Electronic functionDisplay function Main Protection Preheat mode Fan only modeOperation Modes and Functions Preheat terminationCooling Mode Compressor running rules Frequency decreases Holds Model CurrentOutdoor fan rules Condenser high temperature T3 protectionIndoor fan running rules Evaporator low temperature T2 protection Heating Mode Compressor running rulesT1-Ts-ΔT +5.0 +4.5 +3.5 +3.0 +2.5 +2.0 +1.5 +1.0 +0.5 I1HEAT I2HEAT I3HEAT Outdoor fan running rulesIndoor fan rules Unit TEL0 TEL1 VMH09SC-1VMH12SC-1 VMH18SC-1Defrost mode: Defrost Actions For 9K and 12K unit For 18K and 24K unit High evaporator coil temp.T2 protection Auto-modeDehumidify mode Forced operation functionTimer function Sleep function modeAuto-Restart function Ionizer Clean Air functionAutomatic front panel function Troubleshooting SafetyDiagnosis and Solution Indoor Unit Error DisplayEeprom parameter error diagnosis and solution VMH Series E3 Indoor or E7 Outdoor Igbt over current protection diagnosis and solution VMH Series 29 P3 Error Low Ambient Protection Inverter compressor drive error diagnosis and solutionKey parts checking Position Resistance ValueVMH Series Some frequently-used R-T data for T1, T2, T3 and T4 sensor 2012