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Century B-VMH36SD-1 - User Manual

Century B-VMH36SD-1
78 pages
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Service Manual
VMH 9/12/18/24 SU Series
VMH 30/36 SD Series
Inverter Single Zone
Ductless Mini-Split
www.marsdelivers.com

Table of Contents

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Summary

1. Precautions

1.1 Safety Precaution

General safety instructions to prevent injury and property damage.

1.2 Warnings and Cautions

Key warnings and cautions for installation and operation, including environmental factors.

2. Part Names and Functions

2.1 Model Names

Lists model names for indoor and outdoor units with their capacities.

2.2 Component Identification

Diagram illustrating physical parts of indoor and outdoor units.

3. Dimensions

3.1 Indoor Unit Dimensions

Table detailing width, depth, and height for various indoor unit models.

3.2 Outdoor Unit Dimensions

Table detailing dimensions for outdoor units, including service space requirements.

5. Wiring Diagram

6. Installation Details

6.1 Wrench Torque Sheet

Specifies torque values for installation fasteners based on outside diameter.

6.2 Cable Connection

Guidelines for selecting power cords based on appliance amperage and AWG wire size.

6.3 Pipe Length and Elevation

Table showing pipe sizes and maximum elevation/length for different models.

6.4 Initial Installation

Step-by-step guide for initial installation, including leak testing and evacuation.

6.5 Adding Refrigerant

Procedure for adding refrigerant after the system has been running for many years.

6.6 & 6.7 Re-installation Procedures

Instructions for re-installing units after repair, for both indoor and outdoor components.

4. Refrigerant Cycle Diagram

7. Operation Characteristics

8. Electronic Function

8.1 Abbreviations

Defines abbreviations used for temperature sensors and other parameters.

8.2 Display Functions

Explains icons and indicators on the indoor display board.

8.3 Main Protection Features

Lists various protection mechanisms for the compressor, fan, and inverter module.

8.4 Operation Modes and Functions

Describes different operating modes like Fan, Cooling, Heating, Drying, and Auto.

8.4.10 Point Check Function

Instructions on how to access and use the point check function via the remote controller.

9. Troubleshooting

9.1 Indoor Unit Error Codes

Table listing error codes, their meanings, and related display statuses.

9.2 Outdoor Unit Error Indicators

Explains LED indicators and error codes for the outdoor unit.

9.3 Diagnosis and Solutions

Provides diagnosis and solutions for various error codes, starting with EEPROM issues.

9.3.2 Communication Error (E1)

Troubleshooting steps for indoor/outdoor unit communication errors (E1) due to wiring or PCB faults.

9.3.3 Zero Crossing Error (E2)

Diagnosis and solution for zero crossing detection errors (E2), focusing on connections and PCB.

9.3.4 Fan Speed Control Error (E3;F5)

Troubleshooting steps for indoor fan speed control errors (E3/F5), checking wiring, motor, and PCB.

9.3.5 Temperature Sensor Errors

Diagnosing and resolving temperature sensor issues like open circuits or short circuits.

9.3.6 Refrigerant Leakage Detection (EC)

Procedure for diagnosing and resolving refrigerant leakage issues detected by the unit.

9.3.7 Overload Current Protection (F0)

Troubleshooting steps for overload current protection (F0), checking power supply, blockages, and components.

9.3.8 IPM;IGBT Over-Current Protection (P0)

Diagnosing and resolving IPM or IGBT over-current protection faults (P0) related to wiring or components.

9.3.9 Voltage Protection (P1)

Troubleshooting steps for over/under voltage protection (P1), checking power supply, connections, and reactor.

9.3.10 IPM High Temperature Protection (P2)

Steps to diagnose and resolve IPM high temperature protection faults (P2), checking mounting and PCB.

9.3.11 Inverter Compressor Drive Error (P4)

Troubleshooting for inverter compressor drive errors (P4), covering wiring, IPM, fan, and compressor checks.

9.3.12 Low Pressure Protection (P6)

Procedure for diagnosing and resolving low pressure protection issues (P6), checking wiring, protector, and refrigerant.

Main Parts Check

1. Temperature Sensor Checking

Method to check temperature sensors (T1-T4, TP) by measuring resistance with a tester.

Appendix 1: Temperature Sensor Resistance Values

Table providing resistance values for temperature sensors at various Celsius temperatures.

Appendix 2: TP Sensor Resistance Values

Table showing resistance values for the TP sensor at different Celsius temperatures.

Appendix 4: Voltage Specifications

Compressor Checking

3. IPM Continuity Check

Steps to measure IPM resistance between specific terminals using a digital tester.

4. Indoor AC Fan Motor Resistance

Procedure to measure winding resistance values for indoor AC fan motors.

Pressure Service Port Data

Heating Chart Data

Tables and charts showing pressure readings for heating operation at various temperatures.

10. Disassembly Instructions

10.1 Indoor Unit Disassembly

Step-by-step guide with images for removing the indoor unit's front panel.

10.1 Electrical Parts Removal

Instructions for removing electrical components from the indoor unit.

10.1 Evaporator Removal

Steps to remove the evaporator assembly from the indoor unit.

10.1 Fan and Motor Removal

Procedure for removing the fan and motor from the indoor unit.

10.2 Outdoor Unit Disassembly

10.2.1 Panel Plate Removal (9 K;12 K)

Steps to remove the panel plate from outdoor units A-VMH09SU-1 and A-VMH12SU-1.

10.2.2 Fan Assembly Removal

Instructions for removing the fan assembly from the outdoor unit.

10.2.3 Electrical Parts Removal

Steps to remove electrical components from the outdoor unit.

10.2.4 Four-way Valve Removal

Procedure for removing the four-way valve assembly.

10.2.5 Compressor Removal

Steps to remove the compressor from the outdoor unit.

10.2.6 Panel Plate Removal (18 K)

Steps to remove the panel plate from outdoor unit A-VMH18SU-1.

10.2.7 Fan Assembly Removal (18 K)

Instructions for removing the fan assembly from the 18K outdoor unit.

10.2.8 Electrical Parts Removal (18 K)

Steps to remove electrical components from the 18K outdoor unit.

10.2.9 Panel Plate Removal (30 K;36 K)

Steps to remove the panel plate from outdoor units A-VMH30SD-1 and A-VMH36SD-1.

10.2.10 Fan Assembly Removal (30 K;36 K)

Instructions for removing the fan assembly from 30K/36K outdoor units.

10.2.11 Electrical Parts Removal (30 K;36 K)

Steps to remove electrical components from 30K/36K outdoor units.

10.2.12 Four-way Valve Removal

Procedure for removing the four-way valve assembly.

10.2.13 Compressor Removal

Steps to remove the compressor from the outdoor unit.

Century B-VMH36SD-1 Specifications

General IconGeneral
BrandCentury
ModelB-VMH36SD-1
CategoryAir Conditioner
LanguageEnglish

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