mycom 220J

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2205B0JE-DA-J-N_2014.05.

3–14–15 Botan Koto-ku, Tokyo 135-8482, Japan

Screw Compressor

J-Series Instruction Manual

170JS-V/170JM-V/170JL-V

220JS-V/220JM-V/220JL-V

280JS-V/280JM-V/280JL-V

CAUTION

Before operating, maintaining, or inspecting this product, read the manual thoroughly and fully

understand the contents.

Keep the operation manual in a safe, designated place for future reference whenever the need

arises.

Specifications of this product are subject to change without prior notice.

Table of Contents

Questions and Answers:

J
jdavisAug 17, 2025
What causes abnormally high pressure in my mycom Air Compressor?
- S
  Stephanie SimpsonAug 17, 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).
L
Lynn CervantesAug 21, 2025
What to do if my mycom 220J stops immediately after startup?
- K
  katie20Aug 21, 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
Joseph WileySep 1, 2025
What causes faulty indication of capacity control position in my mycom 220J Air Compressor?
- D
  dorothymaloneSep 2, 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.
C
Chad DavisSep 5, 2025
What causes capacity control malfunction in my mycom 220J Air Compressor?
- S
  Samantha RojasSep 5, 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.
R
Richard BakerSep 9, 2025
How to address abnormal vibration and/or noise in my mycom 220J?
- D
  David WilcoxSep 9, 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 220J Specifications

General

Brand	mycom
Model	220J
Category	Air Compressor
Language	English

Summary

Important Information

Important Information for Safe Use of This Product

Provides critical safety guidelines and precautions for operating and maintaining the compressor.

Safety

Safety Observation and Prevention

Outlines essential "Do's" and "Don'ts" for safe operation and maintenance.

Understanding Warning Types and Labels

Identifying and Mitigating Residual Risks

Compressor Safety Devices Overview

Describes essential safety devices like emergency stop buttons and protection circuits.

Structure and Specifications of the Compressor

Compressor Specifications Summary

Compressor Operation Limits

Variable Vi Control System

Installation

Installation Precautions

Advises on essential safety and procedural steps before starting compressor installation.

Compressor Installation Procedures

Covers unpacking, storage, transfer, and general installation tasks.

Compressor Protection Equipment

Lubricant Charging Procedure

Details the steps for initial and additional charging of compressor lubricant oil.

Compressor and Package Operation

Pre-Test Operation Adjustments

Explains how to adjust unloader and Vi slide valves before initial test operation.

Lubricant Selection and Management

Provides guidance on selecting, managing, and handling lubricants for the compressor.

Compressor Operation Precautions

Lists critical safety measures and operational guidelines to prevent issues.

Long-Term Compressor Shutdown Procedure

Maintenance and Inspection

Maintenance and Inspection Precautions

Covers essential safety measures before performing any maintenance or inspection work.

Compressor Maintenance Schedule

Outlines daily, periodical, and overhaul inspection items and intervals.

Guidelines for Compressor Overhaul Frequency

Lubricant Management Standards

Compressor Disassembly and Assembly

Provides detailed instructions for disassembling and reassembling compressor components.

Troubleshooting Guide

Related Documents

Tightening Torques for Bolts and Nuts

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

Compressor Package Design Precautions

Compressor Package Installation Tips

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