About Mycom (Mayekawa)
Mycom is the industrial refrigeration compressor brand of Japan-based Mayekawa. Mayekawa was founded in 1924. Its screw and reciprocating compressors are used in cold storage, food and process cooling, especially in ammonia applications.
In industrial (ammonia) systems, seal, oil and material compatibility is particularly important; this kind of work requires a planned approach and a specialist team.
Note: The corporate information is general and for information purposes only; for current and detailed information, please refer to the manufacturer's official website. The brand name belongs to the relevant company.
Compressor product groups
The table below shows the brand's compressor groups in general terms and our service approach. For model and serial information, check the nameplate.
| Type | Typical use | Service approach |
|---|---|---|
| Industrial screw and reciprocating | Cold storage, process cooling, ammonia | Specialist service; refrigerant-compatible materials |
| Reciprocating (semi-hermetic) | Cold rooms, refrigeration units, older chillers | Valve plate, piston and piston ring overhaul |
Common faults in Mycom (Mayekawa) compressors
| Symptom | Likely cause | Solution |
|---|---|---|
| Leak from the shaft seal | Seal wear, shaft surface damage | Seal replacement (refrigerant-compatible material) |
| Oil separator problems | Separator element clogged, wrong oil level | Separator and oil circuit service |
| Capacity control failure | Slide valve or hydraulic control fault | Slide valve, solenoid and pressure control |
| Bearing noise, vibration | Bearing wear, misalignment | Vibration measurement, bearing renewal |
| Ammonia or industrial refrigerant compatibility | Unsuitable seal, oil or material | Refrigerant-compatible seal and oil selection |
| Oil leak from the shaft seal | Seal wear, shaft surface damage, misalignment | Seal replacement, shaft and coupling check |
| Noise or vibration in the coupling | Misalignment, coupling rubber wear | Alignment with laser or dial indicator, coupling replacement |
| High current on the motor side | Electrical imbalance, mechanical friction, starting problem | Motor and starter measurement, mechanical check |
A significant share of compressor failures stem not from the compressor itself but from the system: liquid return, oil return, low refrigerant or electrical imbalance. That is why we perform a root cause analysis along with the replacement. For details, see the pages on compressor overhaul and when a screw compressor overhaul is needed.
Our overhaul and replacement approach
- Alarm history, current, pressure and temperature records
- Oil analysis and winding (megger) measurement
- A written quote comparing overhaul and replacement costs side by side
- Renewal of bearing, gasket and valve parts
- Equivalence check for replacement: refrigerant, capacity, electrical, connections and oil
- Filter drier, oil and, if needed, system cleaning
- Commissioning and performance test
- Follow-up and report during the first hours
User manual and technical documentation
User and service manuals are copyrighted documents belonging to the manufacturers, so we do not host them on our site. We suggest the following routes:
- Note the model and serial number on the compressor nameplate
- Check the document or download section of the manufacturer's official website
- The manual of the equipment (chiller, refrigeration unit) often includes the compressor information as well
- Request it from the company or dealer you bought the equipment from
- If you cannot find it, send us a photo of the nameplate; we verify the measurements and values on site
Manufacturer's official website: mayekawa.com (external link; the manufacturer is responsible for its content).
What should you send us for service?
- A clear photo of the compressor and equipment nameplate
- The panel alarm screen or alarm history
- A photo of the oil sight glass or oil level
- When and how the fault started
- Information on the last maintenance and refrigerant charge
- City and access information (facility address)
Related pages
Compressor overhaul and replacement · All compressor brands · Cold room and industrial refrigeration · Spare parts · Material information
Frequently asked questions
What should be done first when a Mycom (Mayekawa) compressor fails?
Stop the system and record the alarm history; take photos of the compressor nameplate, the panel alarms and, if there is one, the oil sight glass, and send them to us. Restarting it repeatedly can make the damage worse.
How can I get the manual for my Mycom (Mayekawa) compressor?
Manuals are copyrighted documents belonging to the manufacturer; we do not host them on our site. You can get one from the manufacturer's official website or from the equipment dealer, using the model and serial number. If you want us to assist, we compare the values in the manual with on-site measurements.
Overhaul or replacement for a Mycom (Mayekawa) compressor?
The decision is made based on current, megger, oil analysis and mechanical inspection. Overhaul comes to the fore for mechanical wear; replacement for burnt windings or severe internal damage.
Is YOİ Mühendislik an authorized service for Mycom (Mayekawa)?
No. YOİ Mühendislik works as an independent technical service for this brand and does not claim to be an authorized service. The brand name is used only to indicate which compressors we work on.