Heat Controller VMH12SC-1, VMH24SC-1, VMH09SC-1 Function, Anti-freeze protection in cooling

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Service Manual

VMH Series

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

Anti-freeze protection in cooling

Prevents condensate from freezing on evaporator by sensing the evaporator pipe temperature

in cooling mode

Time Delay Safety control

Restart is for approx. 3 minutes

Indoor fan speed control

Turbo, high, med, low, breeze

Two-direction air vane

The unit will decide the louver direction according to operation mode

Sleep mode auto control

The fan is turned to low speed in both cooling and heating

Independent dehumidification

The function is usually used in rainy days in springtime or damp areas

Air flow Direction control

The louver can be set at the desired position or swing up and down automatically

Auto mode

The mode can be change by the room temperature

Temp. Compensation

Indoor golden fin

IonizerIndoor golden fin

SelfIonizerclean

Follow me

Timer function

Self-diag. function

Anti-cold function

Prevent the cold wind at the beginning of unit start.

Auto defrost

Auto-restart function

When the power supply is interrupted and then restored, the unit automatically restarts at the previous function setting.

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Contents Inverter Single Zone Ductless Mini Split Heat Pump Contents  Installation PrecautionSafety Precaution  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 Display function Electronic functionAbbreviation Main Protection Preheat mode Fan only modeOperation Modes and Functions Preheat terminationCooling Mode Compressor running rules Frequency decreases Holds Model CurrentIndoor fan running rules Condenser high temperature T3 protectionOutdoor fan 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 modeAutomatic front panel function Ionizer Clean Air functionAuto-Restart function Troubleshooting SafetyEeprom 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 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