mycom J Series - User Manual

Other manuals for mycom J Series

Questions and Answers:

K
Kelly MckeeAug 16, 2025
What causes abnormally high pressure in my mycom J Series Air Compressor?
- L
  levypamelaAug 16, 2025
  Abnormally high pressure in your mycom Air Compressor can be caused by a heat exchange failure at the condenser (heat exchanger). Clean and wash the heat exchangers, using solvent depending on the contamination. Other causes include malfunction of the fan motor, thermo-switch, water spray bars, cooling water pumps, etc. (identify malfunctioning devices, examine their causes, take measures, and replace malfunctioning devices), a flow volume adjustment fault for cooling water, brine, etc. (readjust manually or examine the cause and take measures if an automatic control valve is used), or poor performance in the heat exchanger (re-examine the conditions to improve if the trouble is caused by a change in operating conditions).
S
Shawn DennisAug 20, 2025
What to do if my mycom Air Compressor stops immediately after startup?
- M
  Michele MorrisAug 20, 2025
  If your mycom Air Compressor stops immediately after startup, it could be due to the low pressure protection circuit being activated. Check for and stop any refrigerant leaks, then replenish the refrigerant, being aware of potential moisture contamination in the system. Another cause might be insufficient refrigerant circulation volume; if there are any heat exchange failures, such as poor defrost performance, investigate the cause and take corrective actions. A malfunction of the low pressure protection device, pressure sensor, relays, etc., could also be the reason. In this case, identify the malfunctioning devices, examine their causes, take appropriate measures, and then replace the faulty devices.
J
James GrimesAug 31, 2025
What causes faulty indication of capacity control position in my mycom J Series Air Compressor?
- L
  Lisa ThomasAug 31, 2025
  Faulty indication of capacity control position in your mycom Air Compressor may arise from imprecision in the compressor indicator. Manually tighten screws to the 0% indication position of compressor capacity control. It could also be due to imprecision in the controller capacity control indicator, in which case, replace the indicator cam. Another potential cause is a malfunction in the potentiometer; if this is caused by aging degradation or prolonged partial load operation, replace the potentiometer.
J
Justin MillerSep 4, 2025
What causes capacity control malfunction in my mycom Air Compressor?
- T
  Thomas HarrisSep 4, 2025
  Capacity control malfunction in your mycom Air Compressor can occur if 100% or 0% is undetected by the indicator; replace the micro-switch in this case. Malfunction of solenoid (modular) valves or related relays for capacity control can also cause this issue; for aging degradation, replace the parts. Internal leakage of solenoid (modular) valves for capacity control is another possibility; if caused by prolonged low load operation, improve by re-examining the operation method.
M
maryhayesSep 8, 2025
How to address abnormal vibration and/or noise in my mycom J Series Air Compressor?
- D
  Daniel LawrenceSep 8, 2025
  Abnormal vibration or noise in your mycom Air Compressor might be due to insufficient axis adjustment with the motor side; readjust the shaft-center. Another cause could be a large runout in the Male rotor axis; if loose locknuts exist and no other fault is found in parts such as the thrust bearing, tighten the locknuts evenly. Damage to the thrust bearing can also result in abnormal vibration or noise. Note that the appropriate time for replacement will differ due to operating conditions.

mycom J Series Specifications

General

Brand	mycom
Model	J Series
Category	Air Compressor
Language	English

Summary

Preface

Revision History

Records changes made to the manual over time, including revision numbers and dates.

Warranty and Disclaimer

Warranty Clauses

Outlines terms and conditions for product warranty coverage, including repair or replacement.

Disclaimer Clauses

Specifies exclusions from warranty and liability for damages or malfunctions.

Important Information

Intended Use of This Product

Describes the product's designed purpose and limitations.

Important Information for Safe Use of This Product

Provides critical safety guidelines for operating and handling the product.

About This Manual

Information regarding manual usage, copyright, and availability.

Construction of This Manual

Overview of the manual's structure and chapter contents.

1 Safety

1.1 Observation;Prevention

Safety precautions and best practices for operation and maintenance.

1.2 Warnings

Explains warning types, meanings, and safety labels.

1.3 Residual Risks

Identifies potential hazards and necessary countermeasures during operation.

1.4 Safety Devices

Details essential safety features and their functions.

2 Structure and Specifications of the Compressor

2.1 Features of the J-Series Screw Compressor

Highlights key characteristics and advantages of the J-Series compressor.

2.2 Model Designation of the Compressor

Explains the nomenclature used for compressor model identification.

2.3 Compressor Specifications

Provides technical data and parameters for the compressor models.

2.4 Structure of the Compressor

Illustrates internal components and their arrangement within the compressor.

2.5 Mechanisms

Explains the fundamental working principles of screw compressors.

2.6 Oil Flow

Illustrates the path and function of lubricating oil within the compressor.

2.7 Capacity Control Characteristics

Describes how compressor capacity is regulated and its performance curve.

2.8 Variable Vi Control

Details the variable internal volume ratio (Vi) control system.

2.9 Solenoid Valve

Provides specifications for solenoid valves used in capacity and Vi control.

3 Installation

3.1 Precautions for Installation

Essential safety and procedural guidelines before commencing installation.

3.2 Installation Work

Step-by-step procedures for unpacking, storage, transfer, and installation.

3.3 Documents Related to Installation

Lists documents pertinent to the installation process.

4 Compressor and Package Operation

4.1 Adjustment before Test Operation

Procedures for setting unloader and Vi slide valves before initial operation.

4.2 Lubricant (Refrigerant Oil)

Guidance on selecting, managing, and handling compressor lubricant oil.

4.3 Precautions for Operation

Critical operational guidelines to prevent damage and ensure safety.

4.4 Action for Stopping the Compressor for Long Period of Time

Steps to follow for safe long-term shutdown of the compressor.

5 Maintenance and Inspection

5.1 Precautions for Maintenance and Inspection

General safety guidelines and preparation steps before performing maintenance.

5.2 Maintenance List

Scheduled inspection intervals and items for ensuring compressor reliability.

5.3 Management of Lubricant

Standards and criteria for evaluating lubricant quality and condition.

5.4 Disassembly and Assembly of the Compressor

Detailed procedures for disassembling and reassembling compressor components.

6 Troubleshooting

Table 6-1 Troubleshooting

A comprehensive table listing common problems, causes, and solutions.

7 Related Documents

7.1 Development View and Configuration Table of the Parts

Detailed diagrams and part lists for compressor components.

7.2 List of Tightening Torques for Bolts and Nuts

Specifies torque values for various fasteners used in assembly.

7.3 List of Tools for Disassembly

Lists special and standard tools required for compressor maintenance.

7.4 Design Modification Notification (follow-up)

Documents design changes and updates issued for the J-series compressors.

Appendix 1 Tips for Design, Manufacturing, and Installation of the Compressor Package

Appendix 1.1 Precautions for Design of the Compressor Package

Key considerations for designing the compressor package, including limits and protection.

Appendix 1.2 Tips for Compressor Package Manufacturing

Guidance on manufacturing practices, focusing on piping and vessel cleanliness.

Appendix 1.3 Tips for Compressor Package Installation

Procedures for installing the compressor package, ensuring proper alignment and mounting.

Contact Information

How to Order MYCOM Genuine Parts

Guidance on identifying and ordering replacement parts.

Sales Offices;Service Centers

Contact details for MYCOM global sales offices and service centers.

Related product manuals

mycom J Series - User Manual

Table of Contents

Other manuals for mycom J Series

Questions and Answers:

mycom J Series Specifications

Summary

Preface

Revision History

Warranty and Disclaimer

Warranty Clauses

Disclaimer Clauses

Important Information

Intended Use of This Product

Important Information for Safe Use of This Product

About This Manual

Construction of This Manual

1 Safety

1.1 Observation;Prevention

1.2 Warnings

1.3 Residual Risks

1.4 Safety Devices

2 Structure and Specifications of the Compressor

2.1 Features of the J-Series Screw Compressor

2.2 Model Designation of the Compressor

2.3 Compressor Specifications

2.4 Structure of the Compressor

2.5 Mechanisms

2.6 Oil Flow

2.7 Capacity Control Characteristics

2.8 Variable Vi Control

2.9 Solenoid Valve

3 Installation

3.1 Precautions for Installation

3.2 Installation Work

3.3 Documents Related to Installation

4 Compressor and Package Operation

4.1 Adjustment before Test Operation

4.2 Lubricant (Refrigerant Oil)

4.3 Precautions for Operation

4.4 Action for Stopping the Compressor for Long Period of Time

5 Maintenance and Inspection

5.1 Precautions for Maintenance and Inspection

5.2 Maintenance List

5.3 Management of Lubricant

5.4 Disassembly and Assembly of the Compressor

6 Troubleshooting

Table 6-1 Troubleshooting

7 Related Documents

7.1 Development View and Configuration Table of the Parts

7.2 List of Tightening Torques for Bolts and Nuts

7.3 List of Tools for Disassembly

7.4 Design Modification Notification (follow-up)

Appendix 1 Tips for Design, Manufacturing, and Installation of the Compressor Package

Appendix 1.1 Precautions for Design of the Compressor Package

Appendix 1.2 Tips for Compressor Package Manufacturing

Appendix 1.3 Tips for Compressor Package Installation

Contact Information

How to Order MYCOM Genuine Parts

Sales Offices;Service Centers

Related product manuals