mycom 200LUD User Manual

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2200X2JE-MY-S2-N_2020.09.

UD-series

Screw Compressor

Instruction Manual

CAUTION

Read this manual carefully and thoroughly before operating, maintaining or inspecting this

product. It is important to fully comprehend the contents of this manual. 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.

125SUD/125LUD

160SUD/160MUD/160LUD

200SUD/200MUD/200LUD

250SUD/250MUD/250LUD

320SUD/320MUD/320LUD/320LLUD

400SUD/400MUD/400LUD/400LLUD/

400XLUD

Table of Contents

Questions and Answers:

J
Julie WatsonAug 9, 2025
Why does my mycom 200LUD stop immediately after startup?
- J
  jessica52Aug 9, 2025
  Your mycom Air Compressor might stop immediately after startup due to a few reasons. It could be that the low pressure protection circuit has been activated, indicating insufficient refrigerant. In this case, check the system, stop any leaks, and recharge the refrigerant, being cautious about moisture contamination. Another cause could be a malfunction in the pressure regulating valve operation, requiring you to replace the valve or remove the cause. Also, consider the possibility of a malfunction in the low pressure protection device, pressure sensor, or relays, where you'll need to identify the malfunctioning devices, examine their causes, take measures, and then replace them. Lastly, motor overload could be the issue; refer to the motor instruction manual for guidance.
D
Dillon FloresAug 14, 2025
What causes abnormal vibration and/or noise in my mycom 200LUD Air Compressor?
- D
  Daniel CopelandAug 14, 2025
  Abnormal vibration or noise in your mycom Air Compressor can stem from several issues. Check for insufficient alignment between the compressor shaft and motor shaft, and realign the shaft-center if needed. Another cause could be a large axial runout of the male rotor; if loose locknuts are found and no other fault exists in parts like the thrust bearing, tighten the locknuts evenly. Also, inspect for a loose thrust bearing and replace it if defective. Finally, consider imprecision in the dynamic balance of the rotors, which would require overhauling and inspecting the compressor where rotor dynamic balance measurement and adjustment is feasible.
R
Robert BishopAug 31, 2025
What causes capacity control malfunction in my mycom Air Compressor?
- M
  mhallAug 31, 2025
  Capacity control malfunction in your mycom Air Compressor can be attributed to a few potential causes. It could be due to undetected 100% or 0% by the indicator, in which case you should replace the micro-switch. Another cause may be a malfunction of the unloader solenoid valves or related relays for capacity control; for aging degradation, replace the parts. Internal leakage of the unloader solenoid valves for capacity control can also lead to malfunction; if caused by prolonged low load operation, improve by re-examining the operation method.

mycom 200LUD Specifications

General

Brand	mycom
Model	200LUD
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.

Chapter 1 Safety

1.1 Observation/Prevention

Details on safe operating and maintenance practices, including lockout/tagout and PPE.

1.2 Warnings

1.3 Residual Risks

1.4 Safety Devices

Information on essential safety devices like emergency stops and protection circuits.

Chapter 2 Compressor Specifications and Structure

2.3 Compressor Specifications

2.4 Compressor Structure and Mechanism

Chapter 3 Installation

3.1 General Installation Precautions

3.2 Installation Works

Chapter 4 Compressor and Package Unit Operation

4.1 Lubricating Oil (Refrigerant Oil)

Guidance on selecting, handling, controlling, and replacing lubricating oil.

4.2 Precautions for Operation

Chapter 5 Maintenance and Inspection

5.1 Precautions for Maintenance and Inspection

Essential safety rules and precautions for performing maintenance and inspection.

5.2 Maintenance and Inspection List

Daily and periodic inspection items, details, and checkpoints for the compressor.

5.3 Compressor Disassembly Preparation

5.4 Disassembly and Inspection

5.5 Reassembly

Chapter 6 Troubleshooting

01 Compressor does not start up

Identifies causes and actions for when the compressor fails to start.

02 Compressor stops immediately after startup

Troubleshooting steps for compressors that stop shortly after starting.

03 Abnormally low pressure

04 Low oil-supply pressure

Diagnoses and resolves problems related to insufficient oil supply pressure.

05 Abnormal high pressure

Troubleshooting for abnormal discharge pressure, including heat exchange issues.

06 Abnormally high discharge temperature

Explains causes and solutions for excessive discharge temperatures.

07 Leak from mechanical seal

Addresses issues and actions for leaks originating from the mechanical seal.

08 Squeaking sound from mechanical seal part

09 Faulty indication of capacity control position

10 Capacity control malfunction

11 Abnormal vibration and/or noise of compressor

Identifies causes and fixes for abnormal vibrations and operational noise.

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