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Heat Controller VMH12SC-1 Refrigerant Cycle Diagram, VMH Series, Heat Controller, Inc, Wayvalve

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

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Service Manual	VMH Series	Heat Controller, Inc.

4. Refrigerant Cycle Diagram:

INDOOR

OUTDOOR

HEAT EXCHANGE (EVAPORATOR)

LIQUID SIDE

2-WAY VALVE

GAS SIDE

CHECK VALVE (Heating Model only)

CAPILIARY TUBE

HEAT EXCHANGE (CONDENSER)

3-WAY VALVE	REVERSING VALVE
ACCUMULATOR	(Heating Model only)
ACCUMULATOR
	COOLING
COMPRESSOR	HEATING

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Heat Controller VMH12SC-1 Refrigerant Cycle Diagram, VMH Series, Heat Controller, Inc, LIQUID SIDE 2-WAYVALVE GAS SIDE

Contents

Inverter Single Zone Ductless Mini Split Heat PumpVMH Series Version C VMH09SC-1 VMH12SC-1 VMH18SC-1 VMH24SC-1CONTENTS 1. Precaution 1.1Safety Precaution1.2Warning Installation Always install a dedicated circuit and breakerFor installation, always contact the dealer VMH SeriesVMH Series CAUTIONOperational Keep level even when installing the productVMH Series draftVMH Series Do not drink the water drained from the product2. Function VMH SeriesOutdoor unit Compressor delay VMH Series3. Dimension 3.1 Indoor UnitDimension mm VMH Series3.2 Outdoor Unit Dimension mmVMH Series Model4. Refrigerant Cycle Diagram VMH SeriesHeat Controller, Inc LIQUID SIDE 2-WAYVALVE GAS SIDE5. Wiring Diagrams VMH Series5.1 Indoor Units B-VMH09SC-1 B-VMH12SC-1 B-VMH18SC-1 B-VMH24SC-15.2 Outdoor Unit A-VMH09SC-1 A-VMH12SC-1 A-VMH18SC-1VMH Series Heat Controller, Inc6. Installation details 6.1Power WiringVMH Series A-VMH24SC-16.2 Pipe length and the elevation 6.3 Pressure Test & Evacuation VMH Series1. System Evacuation and Charging 7. Operation characteristics VMH Series2. Deep Vacuum Method 3.Triple Evacuation Method8. Electronic function 8.1 Abbreviation8.2Display function T5 Compressor discharge temperature8.3 Main Protection 8.3.2 Temperature protection of compressor top8.3.6 Indoor fan delayed open function VMH Series8.4Operation Modes and Functions 81.527.580.6 77.9VMH Series 8.4.2 Cooling Mode8.4.2.1 Compressor running rules VMH Series Frequency decreases Frequency holdsModel Current8.4.2.4 Condenser high temperature T3 protection VMH Series8.4.2.2 Outdoor fan rules 8.4.2.3Indoor fan running rules8.4.2.5 Evaporator low temperature T2 protection VMH Series8.4.3 Heating Mode 8.4.3.1 Compressor running rulesVMH Series WhileVMH Series Frequency decreases Frequency holdsModel CurrentVMH Series 8.4.3.3 Indoor fan rulesUnit TEL0VMH Series 8.4.3.4 Defrost mode：VMH Series Defrost Actions For 9K and 12K unitFor 18K and 24K unit Heat Controller, IncVMH Series 8.4.3.5 High evaporator coil temp.T2 protection8.4.4 Auto-mode VMH Series 8.4.5 Dehumidify mode8.4.6 Forced operation function 8.4.7 Timer function VMH Series8.4.8 Sleep function mode 8.4.11Ionizer Clean Air function VMH Series8.4.9 Auto-Restartfunction 8.4.10Automatic front panel function9. Troubleshooting SafetyVMH Series Electrolytic Capacitors HIGH VOLTAGE! CAUTION9.1 Indoor Unit Error Display 9.2 Diagnosis and SolutionVMH Series VMH Series VMH Series E3 INDOOR OR E7 OUTDOORVMH Series E5 & E6VMH Series 9.29 P3 ERROR - Low Ambient Protection VMH SeriesKey parts checking VMH SeriesPosition ResistanceVMH Series 8.3.1. Compressor checking Model DA150S1C-20FZVMH Series Room temp.T1 sensor Indoor coil temp.T2 sensorVMH Series Heat Controller, Inc

4. Refrigerant Cycle Diagram:

LIQUID SIDE

CHECK VALVE (Heating Model only)

CAPILIARY TUBE

3-WAY VALVE

REVERSING VALVE

ACCUMULATOR

COOLING

COMPRESSOR

HEATING