mycom 200MUD

Questions and Answers:

L
Leslie MartinAug 9, 2025
Why does my mycom 200MUD stop immediately after startup?
- D
  Deborah IrwinAug 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.
J
Jeremy BrownAug 14, 2025
What causes abnormal vibration and/or noise in my mycom 200MUD?
- M
  Michael RussellAug 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.
C
Cindy MurrayAug 30, 2025
What causes capacity control malfunction in my mycom Air Compressor?
- K
  kblakeAug 30, 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 200MUD Specifications

General

Brand	mycom
Model	200MUD
Category	Air Compressor
Language	English

Summary

Important Information

Important Information for Safe Use of This Product

Provides crucial safety guidelines for operating and maintaining the product.

Chapter 1 Safety

1.1 ObservationPrevention

Discusses safe operating and maintenance practices.

1.2 Warnings

Explains warning symbols and their significance.

1.2.1 Types and Meanings of Warnings

Details the different warning categories and their implications.

1.2.2 Safety labels

1.3 Residual Risks

Identifies potential hazards and corresponding safety measures.

1.4 Safety Devices

Discusses essential safety features of the compressor.

1.4.1 Emergency Stop Button

Details the function and usage of emergency stop buttons.

1.4.2 Breakers for the Main Motor Power and Control Power

1.4.3 Compressor Protection Devices

Lists and describes various safety functions protecting the compressor.

Chapter 2 Compressor Specifications and Structure

2.1 Features of UD-series Screw Compressors

Highlights the key characteristics and advantages of the UD-series.

2.3 Compressor Specifications

Provides detailed technical specifications for different models.

2.3.1 Standard Specifications

Lists standard performance and dimensional data for UD-series compressors.

2.3.2 Operation Limits

Specifies the operational boundaries and conditions for safe use.

2.4 Compressor Structure and Mechanism

Explains the internal workings and components of the compressor.

2.4.1 Overview of UD-series Screw Compressor

2.4.2 Refrigerant Gas Compression Mechanism

Details the process of refrigerant gas compression within the rotors.

2.4.3 Internal Volume Ratio Vi

Explains the concept and importance of the internal volume ratio (Vi).

2.4.4 Bearings and Balance Piston

2.4.6 Capacity Control

Explains the mechanism for controlling compressor capacity.

Chapter 3 Installation

3.1 General Installation Precautions

Provides essential preliminary instructions for installation.

3.2 Installation Works

Details the steps involved in the physical installation process.

3.2.5 Installation

Details the physical installation and alignment procedures.

Shaft Alignment between the Compressor and Driving Machine

Explains the critical process of aligning the compressor and motor shafts.

Chapter 4 Compressor and Package Unit Operation

4.1 Lubricating Oil (Refrigerant Oil)

Information on selecting and managing lubricating oil.

4.1.1 Precautions for Selecting the Lubricating Oil

Key considerations when choosing the correct lubricating oil.

4.1.4 Lubricating Oil Control Criteria

4.1.5 Lubricating Oil Replacement Timing

Guidance on when to replace the lubricating oil.

4.2 Precautions for Operation

Important operational considerations for refrigeration cycles.

4.2.1 Prevention of Liquid Flow-back Operation

How to avoid liquid refrigerant entering the compressor.

Chapter 5 Maintenance and Inspection

5.1 Precautions for Maintenance and Inspection

General safety guidelines before performing maintenance.

5.2 Maintenance and Inspection List

A list of regular inspection items and actions.

5.2.1 Daily Management

5.2.2 Periodic Inspection

Scheduled inspection intervals and tasks.

5.2.3 Guidelines for Compressor Overhaul Frequency

5.3 Compressor Disassembly Preparation

Steps and considerations before disassembling the compressor.

5.3.2 Replacement Parts

Lists parts recommended for replacement during overhauls.

5.3.6 Compressor Disassembly Order

Outlines the sequence for disassembling compressor components.

5.4 Disassembly and Inspection

Details specific component disassembly and inspection procedures.

5.4.2 Shaft Seal Block (125320)

5.4.3 Shaft Seal (400)

5.4.5 Unloader Piston and Unloader Cylinder

5.4.7 Thrust Bearings

5.4.9 Balance Piston

5.4.12 Rotor and Rotor Casing

Disassembly and inspection of the rotors and casing.

5.4.13 Bearing Head and Main Bearing

5.4.14 Unloader Slide Valve and Guide Block

5.5 Reassembly

General information about reassembly procedures.

5.5.3 Rotor

Reassembly procedures for the compressor rotors.

5.5.7 Thrust Bearing Block

5.5.9 Unloader Piston and Unloader Cylinder

Chapter 6 Troubleshooting

Table 6-1 Troubleshooting

Lists common issues, their causes, and recommended actions.

Chapter 7 Related Documents

7.2 Parts Configuration Table

Lists part numbers and details for different compressor models.

7.5 Thrust Bearing Gland

7.8 Tools for Disassembly

Lists specialized tools required for compressor disassembly.

Related product manuals

Table of Contents

Questions and Answers:

mycom 200MUD Specifications

Summary

Important Information

Important Information for Safe Use of This Product

Chapter 1 Safety

1.1 ObservationPrevention

1.2 Warnings

1.2.1 Types and Meanings of Warnings

1.2.2 Safety labels

1.3 Residual Risks

1.4 Safety Devices

1.4.1 Emergency Stop Button

1.4.2 Breakers for the Main Motor Power and Control Power

1.4.3 Compressor Protection Devices

Chapter 2 Compressor Specifications and Structure

2.1 Features of UD-series Screw Compressors

2.3 Compressor Specifications

2.3.1 Standard Specifications

2.3.2 Operation Limits

2.4 Compressor Structure and Mechanism

2.4.1 Overview of UD-series Screw Compressor

2.4.2 Refrigerant Gas Compression Mechanism

2.4.3 Internal Volume Ratio Vi

2.4.4 Bearings and Balance Piston

2.4.6 Capacity Control

Chapter 3 Installation

3.1 General Installation Precautions

3.2 Installation Works

3.2.5 Installation

Shaft Alignment between the Compressor and Driving Machine

Chapter 4 Compressor and Package Unit Operation

4.1 Lubricating Oil (Refrigerant Oil)

4.1.1 Precautions for Selecting the Lubricating Oil

4.1.4 Lubricating Oil Control Criteria

4.1.5 Lubricating Oil Replacement Timing

4.2 Precautions for Operation

4.2.1 Prevention of Liquid Flow-back Operation

Chapter 5 Maintenance and Inspection

5.1 Precautions for Maintenance and Inspection

5.2 Maintenance and Inspection List

5.2.1 Daily Management

5.2.2 Periodic Inspection

5.2.3 Guidelines for Compressor Overhaul Frequency

5.3 Compressor Disassembly Preparation

5.3.2 Replacement Parts

5.3.6 Compressor Disassembly Order

5.4 Disassembly and Inspection

5.4.2 Shaft Seal Block (125320)

5.4.3 Shaft Seal (400)

5.4.5 Unloader Piston and Unloader Cylinder

5.4.7 Thrust Bearings

5.4.9 Balance Piston

5.4.12 Rotor and Rotor Casing

5.4.13 Bearing Head and Main Bearing

5.4.14 Unloader Slide Valve and Guide Block

5.5 Reassembly

5.5.3 Rotor

5.5.7 Thrust Bearing Block

5.5.9 Unloader Piston and Unloader Cylinder

Chapter 6 Troubleshooting

Table 6-1 Troubleshooting

Chapter 7 Related Documents

7.2 Parts Configuration Table

7.5 Thrust Bearing Gland

7.8 Tools for Disassembly

Related product manuals