mycom i160L - User Manual

Questions and Answers

M
Matthew ValdezAug 15, 2025
What to do if my mycom Air Compressor stops immediately after startup?
- J
  jason08Aug 15, 2025
  If your mycom Air Compressor stops immediately after starting, it could be due to the activation of the low pressure protection circuit. To resolve this, check for refrigerant leaks, stop any leaks found, and then add refrigerant. Also, be aware of potential moisture entering the system. Alternatively, the issue might stem from a malfunctioning low pressure protection switch, pressure sensor, or relay. Identify any defective devices, investigate the cause of the failure, take necessary actions, and replace the failed device.
J
james82Aug 21, 2025
How to troubleshoot a mycom Compressor that does not start up?
- K
  Kevin WeberAug 21, 2025
  If your mycom Compressor isn't starting, several factors could be at play. First, ensure the power source is active; use a checklist to confirm post-inspection actions. A main motor failure could also be the cause, so consult the motor's instruction manual for detailed troubleshooting. Check that the cooling water is circulating correctly, and if not, identify and replace any defective devices. A clogged circulation route can also prevent startup, so clear any blockages. Additionally, a faulty magnet, relay, or other component in the startup circuit may be the culprit, requiring replacement. Finally, a poor installation environment can hinder performance; improve temperature, humidity, and ventilation, and replace any defective ventilation fans.
R
rparksAug 25, 2025
What to do if my mycom Compressor stops immediately after starting?
- J
  james73Aug 25, 2025
  If the mycom Compressor stops immediately after starting, it could be due to the low pressure protection circuit activating. To fix this, check for refrigerant leaks, stop any leaks, and then add more refrigerant. Also, be mindful of moisture entering the system. Alternatively, the issue might stem from a failure in the low pressure protection switch, pressure sensor, or relay. In this case, identify the defective device, investigate the cause of failure, take necessary actions, and then replace the failed device.
B
Brenda StoneAug 30, 2025
Why does my mycom Compressor generate abnormal vibration and/or sound?
- A
  Anthony HernandezAug 30, 2025
  If your mycom Compressor is generating abnormal vibration or sound, one potential cause is excessive vibration of the motor shaft. If other causes are ruled out, consider overhauling the compressor at a facility equipped for dynamic balance measurement and adjustment. Another cause could be liquid flow-back during startup, which often presents with a loud, abnormal noise; identify and address the root cause, then overhaul and inspect the compressor. Liquid flow-back during operation, indicated by notable frosting on the suction side, can also cause these issues. To prevent this, avoid rapid changes in heat load that exceed the set value of the heat exchanger and expansion valve.
N
Nancy GonzalezSep 2, 2025
What to do if there is a leak from the mechanical seal of my mycom Compressor?
- T
  taylor34Sep 2, 2025
  If you notice a leak from the mechanical seal of your mycom Compressor, it could be due to an initial leak after replacement, which should decrease gradually as the sliding faces settle. Ensure the leak doesn't increase continuously. The duration of this initial leak is approximately 200 hours. Alternatively, the sliding surface may be roughened due to overheating. In this case, review the operating conditions to reduce the frequency of starting and stopping the equipment. Finally, deteriorated parts can also cause leaks; replace them as needed, referring to causes and actions for "Overheating of sliding surface."
G
gdominguezSep 8, 2025
What causes capacity control malfunction in my mycom Compressor?
- S
  Sheila WrightSep 8, 2025
  If the capacity control is malfunctioning on your mycom Compressor, it could be due to a failure of the capacity control solenoid valve or related relays. If these parts are deteriorated, replace them. If water leakage is the cause, remove the source of the leak and replace any defective parts. Internal leakage of the capacity control solenoid valve can also cause issues, requiring replacement of the valve. Lastly, a defective capacity control oil supply line can lead to malfunction; remove the cause of the defect, and check the oil for contamination, replacing it if necessary.
A
Ann StaffordSep 12, 2025
What causes damaged thrust bearings in my mycom Compressor?
- A
  andreacastilloSep 12, 2025
  If your mycom Compressor has damaged thrust bearings, one potential cause is excessive thrust stress due to high suction pressure exceeding the level set by operating conditions. Re-examine the operating conditions and improve them if possible. If improvement is difficult, review the maintenance interval management. Another cause could be faulty assembly, such as lock nuts tightened insufficiently, lock washer tab not bended, rotation stopper not set to thrust bearing gland, or spring washer not assembled. Tighten lock nuts to the specified torque or torque angle and record data on the assembly check sheet to prevent omission of work steps.
M
Matthew WalkerNov 17, 2025
Why my mycom i160L does not start up?
- C
  Crystal HernandezNov 17, 2025
  If your mycom Air Compressor doesn't start, it could be due to several reasons. First, ensure the power source is on, using a check sheet for post-inspection actions. It could also be due to main motor failure, in which case you should refer to the motor's instruction manual. Another potential cause is the cooling water circulation not being confirmed, which requires identifying defective devices, investigating the causes of failure, taking necessary actions, and replacing any failed devices. A clogged circulation route can also prevent startup; if this is the case, remove the clogging. Also, check for failure of the magnet, relay, etc. in the compressor startup circuit. Defective devices should be identified and replaced with a new one. Lastly, a poor installation environment can cause st...
H
Haley ZunigaNov 26, 2025
Why is the pressure abnormally high in my mycom Compressor?
- S
  Sarah MorenoNov 26, 2025
  If you're experiencing abnormally high pressure (abnormal discharge pressure) in your mycom Compressor, several factors could be the cause. A heat exchange failure in the condenser might be the reason; try cleaning and washing it, using chemical cleaning if heavily contaminated. A failure in the fan motor, thermo switch, water spraying pipes, or cooling water pumps could also be responsible; identify and replace any defective devices. Check for faulty adjustment of cooling water or brine flow, readjusting the valve if it's manually controlled, or investigating the cause if it's an automatic valve. Other issues could include insufficient cooling water flow, so inspect filters for clogging, check for leaks, and examine water supply routes. If the heat exchanger performance is deficient, re-e...

Summary

Preface

Revision History

Records changes and updates made to the manual over time.

Warranty and Disclaimer

Warranty Clauses

Details the terms and conditions of the product warranty provided by MAYEKAWA.

Disclaimer of Warranty

Lists conditions and situations that are exempted from warranty coverage.

Important Information

Intended Use of this Product

Defines the designated purpose of the screw compressor for refrigeration and cold storage.

Important Information for Safe Use of this Product

Crucial safety guidelines and precautions for operating the compressor safely.

About This Manual

Explains manual usage, copyright, modifications, and contact information.

Structure of This Manual

Provides an overview of the manual's organization and chapter content for navigation.

1 Safety

1.1 Strict Requirements and Prohibitions

Outlines essential safety rules, do's, and don'ts for operation and maintenance.

1.2 Warnings

Explains the meaning of warning symbols to identify potential hazards and risks.

1.3 Residual Risks

Identifies hazardous sources and details countermeasures for safe operation and maintenance.

1.4 Safety Devices

Describes critical safety devices like emergency stop buttons and circuit breakers.

Chapter 2 Compressor Specifications and Configuration

2.1 Features of i-Series Compressor

Highlights the main features and advantages of the i-Series screw compressor.

2.3 Compressor Specifications

Details key technical specifications like dimensions, performance, and materials.

2.3.1 Standard Specifications

Provides detailed technical data including motor connections, mass, speed, and refrigerant.

2.3.2 Operation Limits

Defines the acceptable operating ranges for speed, pressure, and temperature.

2.3.3 Alarm Set Values

Lists the critical alarm and stop set values for compressor protection.

2.4 Configuration of Compressor

Illustrates internal component layouts through longitudinal and cross-sectional views.

2.4.1 Sectional Views

Provides detailed diagrams of compressor internal structures.

2.4.2 Exploded Views

Displays exploded views of compressor parts for identification and assembly.

2.5 Mechanisms

Explains the fundamental working principles of the screw compressor mechanism.

2.5.6 Capacity Control Mechanism

Details the three-step capacity control system using unloader pistons.

Chapter 3 Installation

3.1 General Precautions for Installation

Essential safety guidelines and prerequisites for compressor installation.

3.2 Installation Works

Covers procedures from unpacking to final checks after installation.

3.2.3 Transportation

Safety precautions and procedures for safely transporting the compressor.

3.2.5 Installation

Details on connecting piping, installing protective equipment, and testing.

3.2.5.1 Piping Connection

Instructions for connecting refrigerant and oil supply piping systems.

3.2.5.2 Equipment and Devices for Protection of the Compressor

Selection and installation of protective devices and filters for compressor safety.

3.2.7 Lubricating Oil Charge

Steps for filling the compressor with lubricating oil.

3.2.8 Charge of Refrigerant

Procedure for charging refrigerant into the system safely.

Chapter 4 Compressor and Package Unit Operation

4.1 Lubricating Oil (Refrigerant Oil)

Key considerations for choosing the correct lubricating oil based on refrigerant and conditions.

4.1.1 Precautions for Selecting the Lubricating Oil

Factors to consider when selecting appropriate lubricating oil for the compressor.

4.1.2 Recommended Lubricating Oils

Lists specific lubricating oils recommended by the manufacturer for various refrigerants.

4.2 Precautions for Operation

Guidelines and precautions for safe and efficient compressor operation.

4.2.1 Prevention of Liquid Flow-back

Measures to prevent harmful liquid refrigerant from entering the compressor.

4.3 When Stopping the Compressor for a Long Time

Steps for safely shutting down and preparing the compressor for extended storage.

Chapter 5 Maintenance and Inspection

5.1 Precautions for Maintenance and Inspection

Critical safety precautions before performing any maintenance or inspection tasks.

5.2 Maintenance and Inspection List

Lists daily, periodic, and overhaul inspection items and intervals.

5.2.1 Daily Management

Daily checks and data recording for monitoring compressor and system status.

5.2.2 Periodic Inspection

Schedule and items for regular periodic inspections of the compressor.

5.3 Compressor Disassembly Preparation

Preparation steps and tools needed before disassembling the compressor.

5.3.2 Replacement Parts

Lists standard replacement parts required for compressor overhauling.

5.4 Disassembly and Inspection

Detailed procedures for disassembling and inspecting major compressor components.

5.4.1 Shaft Seal Block

Detailed steps for disassembling the shaft seal block assembly.

5.4.5 Thrust Bearing Block

Steps for disassembling and inspecting the thrust bearing block assembly.

5.5 Reassembly

General guidelines and precautions for reassembling compressor parts after maintenance.

Chapter 6 Troubleshooting

01 Compressor does not start up

Symptoms, causes, and actions for a compressor failing to start.

02 Compressor stops immediately after startup

Troubleshooting steps for immediate shutdown after startup.

03 Abnormally low pressure (Low suction pressure)

Diagnosing and resolving issues related to low suction pressure.

04 Low oil pressure (Low oil supply pressure)

Troubleshooting low oil pressure or supply problems.

05 Abnormally high pressure (Abnormal discharge pressure)

Addressing issues causing abnormally high discharge pressure.

10 Compressor generates abnormal vibration and;or sound

Diagnosing and resolving abnormal vibration and noise issues.

Chapter 7 Related Documents

7.1 Tightening Angles for Lock Nuts

Specifies the correct angle ranges for tightening rotor lock nuts.

7.2 Disassembly Tools

Lists the specific tools required for compressor disassembly and maintenance.

7.3 Flange Motor and Connection Flange Size

Details flange motor and connection flange sizes for various models.

Appendix 1: Basic Points of Design and Manufacturing for the Compressor Package

1-1 Basic Flow of the Package Unit

Illustrates the fundamental flow diagram of a single-package unit.

1-3 Oil Temperature Control

Explains methods for controlling lubricating oil temperature.

1-7 Power Supply and Control Devices

Shows examples of power control circuits and starting methods.

Appendix 2: Basic Points of Design and Manufacturing for the Compressors Multi- package

2-1 Preface

Introduces the basic design and manufacturing points for multi-package units.

2-2 Reference Flow and Configuration Components for Multi-package

Details components and flow for multi-compressor systems.

2-2-5 Oil Filter and Oil Line

Requirements for oil filters and lines in multi-compressor setups.

2-4 Protection Devices and Control Devices

Necessity of protection and control devices for multi-package units.

mycom i160L Specifications

General

Brand	mycom
Model	i160L
Category	Air Compressor
Language	English

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