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Heat Controller VMH18SC-1 User Manual

Heat Controller VMH18SC-1
45 pages
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Heat Controller, Inc. 1900 Wellworth Ave. Jackson, MI 49203 (517)787-2100 www.heatcontroller.com
SERVICE MANUAL
Inverter Single Zone
Ductless Mini Split Heat Pump
VMH Series Version C
VMH09SC-1
VMH12SC-1
VMH18SC-1
VMH24SC-1
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Heat Controller VMH18SC-1 Specifications

General IconGeneral
Power Supply208/230V, 1Ph, 60Hz
RefrigerantR-410A
Outdoor Unit Noise Level55 dB(A)
Cooling Capacity18000 BTU/h
Heating Capacity18000 BTU/h

Summary

Precautions and Warnings

Safety Precautions

General safety instructions to prevent injury and property damage.

Installation Warnings

Critical warnings for electrical work, grounding, and installation procedures.

Unit Functions

Indoor Unit Functions

Details on the operational capabilities and features of the indoor unit.

Outdoor Unit Functions

Details on the operational capabilities and features of the outdoor unit.

Unit Dimensions

Indoor Unit Dimensions

Physical dimensions and installation clearances for the indoor unit.

Outdoor Unit Dimensions

Physical dimensions and installation clearances for the outdoor unit.

Refrigerant Cycle Diagram

Refrigerant Flow Explanation

Diagram illustrating the refrigerant path during cooling and heating operations.

Wiring Diagrams

Indoor Unit Wiring

Electrical schematic for indoor unit components and connections.

Outdoor Unit Wiring

Electrical schematic for outdoor unit components and connections.

Installation Details

Power Wiring Guidelines

Instructions for proper electrical power connection and cable sizing.

Pipe Length and Elevation

Specifications for refrigerant line set length, elevation, and oil traps.

Pressure Test and Evacuation

Procedures for system pressure testing and vacuum evacuation.

Operation Characteristics

Operating Temperature Ranges

Defines the temperature limits for cooling, heating, and drying operations.

Electronic Functions and Features

Abbreviations and Terminology

List of technical abbreviations used in the manual.

Indoor Display Functions and Icons

Explanation of symbols and indicators on the indoor unit display.

Main Protection Mechanisms

Compressor Protection Features

Details on protections for compressor top and discharge temperature.

Operation Modes

Fan Only Mode

Description of the fan-only operation mode and its settings.

Cooling Mode Operation

Rules and logic for compressor and fan operation during cooling.

Heating Mode Operation

Rules and logic for compressor and fan operation during heating.

Other Operation Modes

Details on auto, dehumidify, forced, timer, sleep, and advanced functions.

Troubleshooting

Safety Precautions for Troubleshooting

Important safety warnings related to capacitor discharge and electrical hazards.

Indoor Unit Error Display Codes

List of error codes displayed on the indoor unit.

Troubleshooting Common Errors

Diagnostic procedures for communication, sensor, protection, and compressor errors.

Key Parts Checking

Component Resistance Checks

Procedures for checking resistance of compressor, step motor, and fan motors.

Sensor Resistance Data

Temperature Sensor Resistance Charts

Resistance values for various temperature sensors at different temperatures.

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