Heat Controller A-VMH18DC-1, A-VMH27TC-1, A-VMH36QC-1

Heat Controller, Inc. VMH SerieS Service Manual

Appendix 4:

Contents

Main CONTENTS 1. General information of Outdoor Units 2Features 3. Dimensions 4. Wiring Diagram Page 5. Refrigeration Cycle Diagram 8.1 Refrigeration circuit drawing of inverter dual zone: A-VMH18DC-1 INDOOR OUTDOOR 5.2 Refrigeration circuit drawing of inverter tri-zone: A-VMH27TC-1 8.3 Refrigeration circuit drawing of inverter Quad-zone: A-VMH36QC-1 INDOOR OUTDOOR 6. Indoor units combination 6.1 Indoor unit combinations for A-VMH18DC-1 6.2 Indoor unit combinations A-VMH27TC-1 6.3 Indoor unit combinations A-VMH36QC-1 7. Installation Details 7.1 Wrench torque sheet for installation 7.2 Connecting the cables Pipe length and elevation 7.4 Installation for the first time Page Page 7.5 Adding the refrigerant due to loss of charge 7.6 Replacing the indoor unit Page 7.7 Replacing the outdoor unit Page 8. Electronic control function 8.1 Abbreviations 8.2 Electric control working environment. 8.3 Outdoor units digital display 8.4 Outdoor unit point check function 8.4.1 Frequency of compressor: 8.4.2 Running mode: 8.4.3 Capacity demand: Cooling mode Heating mode Note: The capacity is just for reference. 8.5 Protection Page Page 9. Troubleshooting 9.1 Indoor Mini-Split error code explanations: 9.2 Outdoor unit error code explanation: 9.3 Trouble shooting 9.3.1.2 Indoor / outdoor units communication error Yes A: SEE A Page Page 9.3.1.5 Indoor fan speed has been out of control(AC fan motor) Replace indoor PCB. Yes freely? Correct the connections per wiring diagram. Page Check the connections between temperature sensor and PCB. Are the connections good? Check the resistance value of the sensor via Appendix 1, is it normal? No 9.3.2 Outdoor unit trouble shooting 9.3.2.2 Voltage protection (ODU E5) Page 9.3.2.4 Temperature protection of compressor discharge (ODU P0) 9.3.2.5 Temperature protection of compressor top (ODU P0) 9.3.2.6 High pressure protection (ODU P1) (Only for A-VMH36QC-1) 9.3.2.7 Low pressure protection (ODU P2) (Only for A-VMH36QC-1) 9.3.2.8 Current protection of compressor (ODU P3) 9.3.2.9 IPM module compressor (ODU P4) Page 9.3.2.11 High PFC module protection (ODU P6) (Only for A-VMH36QC-1) Appendix 1 Temperature Sensor Resistance Value Table (--K) Use appendix 4 to convert C to F. Appendix 2 + ~ _ ~ + - ~ ~ + - ~ Page Appendix 5: