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

Models: VMH18SC-1 VMH09SC-1 VMH24SC-1 VMH12SC-1

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

Contents

Ductless Mini Split Heat Pump Inverter Single ZoneVMH Series Version C VMH09SC-1 VMH12SC-1 VMH18SC-1 VMH24SC-1CONTENTS 1.1Safety Precaution 1. Precaution1.2Warning Installation Always install a dedicated circuit and breakerVMH Series For installation, always contact the dealerCAUTION VMH SeriesKeep level even when installing the product OperationalVMH Series draftDo not drink the water drained from the product VMH SeriesVMH Series 2. FunctionVMH Series Outdoor unit Compressor delay3.1 Indoor Unit 3. DimensionDimension mm VMH SeriesDimension mm 3.2 Outdoor UnitVMH Series ModelVMH Series 4. Refrigerant Cycle DiagramHeat Controller, Inc LIQUID SIDE 2-WAYVALVE GAS SIDEVMH Series 5. Wiring Diagrams5.1 Indoor Units B-VMH09SC-1 B-VMH12SC-1 B-VMH18SC-1 B-VMH24SC-1A-VMH18SC-1 5.2 Outdoor Unit A-VMH09SC-1 A-VMH12SC-1VMH Series Heat Controller, Inc6.1Power Wiring 6. Installation detailsVMH Series A-VMH24SC-16.2 Pipe length and the elevation VMH Series 6.3 Pressure Test & Evacuation1. System Evacuation and Charging VMH Series 7. Operation characteristics2. Deep Vacuum Method 3.Triple Evacuation Method8.1 Abbreviation 8. Electronic function8.2Display function T5 Compressor discharge temperature8.3.2 Temperature protection of compressor top 8.3 Main Protection8.3.6 Indoor fan delayed open function VMH Series81.527.5 8.4Operation Modes and Functions80.6 77.98.4.2 Cooling Mode VMH Series8.4.2.1 Compressor running rules Frequency decreases Frequency holds VMH SeriesModel CurrentVMH Series 8.4.2.4 Condenser high temperature T3 protection8.4.2.2 Outdoor fan rules 8.4.2.3Indoor fan running rulesVMH Series 8.4.2.5 Evaporator low temperature T2 protection8.4.3 Heating Mode 8.4.3.1 Compressor running rulesWhile VMH SeriesFrequency decreases Frequency holds VMH SeriesModel Current8.4.3.3 Indoor fan rules VMH SeriesUnit TEL08.4.3.4 Defrost mode： VMH SeriesDefrost Actions For 9K and 12K unit VMH SeriesFor 18K and 24K unit Heat Controller, Inc8.4.3.5 High evaporator coil temp.T2 protection VMH Series8.4.4 Auto-mode 8.4.5 Dehumidify mode VMH Series8.4.6 Forced operation function VMH Series 8.4.7 Timer function8.4.8 Sleep function mode VMH Series 8.4.11Ionizer Clean Air function8.4.9 Auto-Restartfunction 8.4.10Automatic front panel functionSafety 9. TroubleshootingVMH Series Electrolytic Capacitors HIGH VOLTAGE! CAUTION9.2 Diagnosis and Solution 9.1 Indoor Unit Error DisplayVMH Series VMH Series E3 INDOOR OR E7 OUTDOOR VMH SeriesE5 & E6 VMH SeriesVMH Series VMH Series 9.29 P3 ERROR - Low Ambient ProtectionVMH Series Key parts checkingPosition Resistance8.3.1. Compressor checking Model DA150S1C-20FZ VMH SeriesRoom temp.T1 sensor Indoor coil temp.T2 sensor VMH SeriesHeat Controller, Inc VMH Series