Service Manual for Heat Pumps - VMH Series by Heat Controller Inc, Jackson MI

SERVICE MANUAL

Inverter Single Zone

Ductless Mini Split Heat Pump

VMH Series Version C

VMH09SC-1

VMH12SC-1

VMH18SC-1

VMH24SC-1

Heat Controller, Inc. • 1900 Wellworth Ave. • Jackson, MI 49203 • (517)787-2100 • www.heatcontroller.com

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Heat Controller VMH24SC-1, VMH12SC-1, VMH09SC-1, VMH18SC-1 service manual Inverter Single Zone Ductless Mini Split Heat Pump

Contents

Inverter Single Zone Ductless Mini Split Heat Pump Contents Safety Precaution Precaution Installation  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 Function Outdoor unit Compressor delay Indoor Unit Dimension Outdoor Unit Model Dimension mm Indoor Outdoor Refrigerant Cycle Diagram Wiring Diagrams VMH09SC-1 A-VMH12SC-1 VMH18SC-1 Installation details Single Zone V Series Inverter System Pipe length and the elevation System Evacuation and Charging Pressure Test & Evacuation Operation characteristics Abbreviation Electronic functionDisplay function Main Protection Fan only mode Preheat modeOperation Modes and Functions Preheat termination Cooling Mode Compressor running rules Model Current Frequency decreases Holds Outdoor fan rules Condenser high temperature T3 protectionIndoor fan running rules Heating Mode Compressor running rules Evaporator low temperature T2 protection T1-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 I3HEAT Unit TEL0 TEL1 VMH09SC-1 Indoor fan rulesVMH12SC-1 VMH18SC-1 Defrost mode： Defrost Actions For 9K and 12K unit For 18K and 24K unit Auto-mode High evaporator coil temp.T2 protection Forced operation function Dehumidify mode Sleep function mode Timer function Auto-Restart function Ionizer Clean Air functionAutomatic front panel function Safety Troubleshooting Diagnosis 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 Inverter compressor drive error diagnosis and solution 29 P3 Error Low Ambient Protection Position Resistance Value Key parts checking VMH Series Some frequently-used R-T data for T1, T2, T3 and T4 sensor 2012