mycom 220J User Manual

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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.

mycom 220J Specifications

General

Brand	mycom
Model	220J
Category	Air Compressor
Language	English

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