mycom 250SUD

Questions and Answers:

M
maryjonesAug 10, 2025
Why does my mycom 250SUD stop immediately after startup?
- R
  Rebecca LeonAug 10, 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
Joseph WoodsAug 13, 2025
What causes abnormal vibration and/or noise in my mycom 250SUD?
- C
  chopkinsAug 13, 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
cheryl16Aug 31, 2025
What causes capacity control malfunction in my mycom 250SUD Air Compressor?
- J
  Jose PhamAug 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 250SUD Specifications

General

Power	2.2 kW
Maximum Pressure	8 bar
Tank Capacity	50 L
Phase	Single
Weight	50 kg

Summary

Warranty and Disclaimer

Important Information

Important Information for Safe Use of This Product

Provides essential guidelines and precautions for the safe operation and handling of the product.

Chapter 1 Safety

1.1 ObservationPrevention

Covers general precautions, do's, and don'ts for safe operation and maintenance.

1.2 Warnings

Explains the types and meanings of warning symbols and labels used in the manual and on the product.

1.3 Residual Risks

Identifies potential hazards and necessary safety measures during operation, inspection, and maintenance.

1.4 Safety Devices

Details various safety devices incorporated into the compressor and their functions for protection.

Chapter 2 Compressor Specifications and Structure

2.3 Compressor Specifications

Provides detailed technical specifications for various compressor models.

2.3.1 Standard Specifications

Lists the standard operational data and performance metrics for the compressor series.

2.3.2 Operation Limits

Defines the safe operating parameters and boundaries for the compressor.

Chapter 3 Installation

3.1 General Installation Precautions

Provides essential safety and procedural guidelines before commencing compressor installation.

3.2 Installation Works

Details the specific steps and procedures involved in installing the compressor unit.

3.2.3 Transportation

Covers safe procedures for transporting the compressor, including lifting and handling.

3.2.4 Preparation for Installation

Outlines necessary preparations like installation space, illumination, and ventilation.

3.2.5 Installation

Details the actual process of installing the compressor, including shaft alignment.

3.2.8 Lubricating Oil Charge

3.2.9 Charge of Refrigerant

Chapter 4 Compressor and Package Unit Operation

4.1 Lubricating Oil (Refrigerant Oil)

Covers the selection, management, and properties of lubricating oil for the compressor.

4.1.1 Precautions for Selecting the Lubricating Oil

Provides critical advice on choosing the correct type of lubricating oil based on system requirements.

4.2 Precautions for Operation

Covers essential precautions to be taken during compressor operation.

4.2.1 Prevention of Liquid Flow-back Operation

Chapter 5 Maintenance and Inspection

5.1 Precautions for Maintenance and Inspection

Outlines critical safety precautions before performing any maintenance or inspection tasks.

5.2 Maintenance and Inspection List

Provides a comprehensive list of items and intervals for routine maintenance and inspection.

5.2.1 Daily Management

5.2.2 Periodic Inspection

5.2.3 Guidelines for Compressor Overhaul Frequency

5.3 Compressor Disassembly Preparation

Covers the essential steps and tools needed before disassembling the compressor for overhaul.

5.3.1 Disassembly Tools and Workplace

5.3.2 Replacement Parts

Identifies parts recommended for replacement during compressor overhauling.

5.3.3 Refrigerant Gas Recovery

5.3.4 Removal of Connections to the Unit

5.3.5 Removal of the Compressor from Base Frame

5.3.6 Compressor Disassembly Order

Outlines the recommended sequence for disassembling compressor components.

5.4 Disassembly and Inspection

Detailed procedures for disassembling and inspecting specific compressor parts.

5.4.12 Rotor and Rotor Casing

Explains the disassembly and inspection of the compressor rotors and casing.

5.5 Reassembly

Procedures for reassembling the compressor components after maintenance or overhaul.

5.5.3 Rotor

Details the reassembly process for the compressor rotors.

Chapter 6 Troubleshooting

01 Compressor does not start up

Provides troubleshooting steps for when the compressor fails to start.

02 Compressor stops immediately after startup

Offers solutions for issues where the compressor shuts down shortly after starting.

03 Abnormally low pressure

04 Low oil-supply pressure

Addresses problems related to insufficient oil supply pressure to the compressor.

05 Abnormal high pressure

Troubleshooting steps for abnormal high pressure (discharge) in the compressor.

06 Abnormally high discharge temperature

Provides solutions for excessively high discharge temperatures in the compressor.

07 Leak from mechanical seal

10 Capacity control malfunction

11 Abnormal vibration andor noise of compressor

Troubleshooting guide for excessive vibration or noise generated by the compressor.

Related product manuals

Table of Contents

Questions and Answers:

mycom 250SUD Specifications

Summary

Warranty and Disclaimer

Important Information

Important Information for Safe Use of This Product

Chapter 1 Safety

1.1 ObservationPrevention

1.2 Warnings

1.3 Residual Risks

1.4 Safety Devices

Chapter 2 Compressor Specifications and Structure

2.3 Compressor Specifications

2.3.1 Standard Specifications

2.3.2 Operation Limits

Chapter 3 Installation

3.1 General Installation Precautions

3.2 Installation Works

3.2.3 Transportation

3.2.4 Preparation for Installation

3.2.5 Installation

3.2.8 Lubricating Oil Charge

3.2.9 Charge of Refrigerant

Chapter 4 Compressor and Package Unit Operation

4.1 Lubricating Oil (Refrigerant Oil)

4.1.1 Precautions for Selecting the Lubricating Oil

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

5.3.1 Disassembly Tools and Workplace

5.3.2 Replacement Parts

5.3.3 Refrigerant Gas Recovery

5.3.4 Removal of Connections to the Unit

5.3.5 Removal of the Compressor from Base Frame

5.3.6 Compressor Disassembly Order

5.4 Disassembly and Inspection

5.4.12 Rotor and Rotor Casing

5.5 Reassembly

5.5.3 Rotor

Chapter 6 Troubleshooting

01 Compressor does not start up

02 Compressor stops immediately after startup

03 Abnormally low pressure

04 Low oil-supply pressure

05 Abnormal high pressure

06 Abnormally high discharge temperature

07 Leak from mechanical seal

10 Capacity control malfunction

11 Abnormal vibration andor noise of compressor

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