Thermo Scientific
Thermo Electron LED GmbH · Model Megafuge ST4F Plus-MD
Megafuge ST4F Plus-MD 208-240V/50/60Hz.
Intended use: An electrically-powered device intended to be used to separate the components of multiple types and various volumes of clinical suspensions using centrifugal force. It is a self-contained unit with an electric motor, a vertical shaft, and a horizontal rotor attached to the upper end. It is typically used to centrifuge various types of clinical specimens, either alone or after addition of reagents or other additives, for subsequent in vitro diagnostic analysis. It may additionally have refrigeration capabilities to perform temperature-sensitive procedures.
Key tips
- ·When no category-specific guidance fits, default to the manufacturer's own service manual and the general troubleshooting method in the Engineer's Guide.
- ·Run an incoming and annual electrical safety test regardless of how niche the device is.
Typical Failure Modes
Compiled for this model from its own documentation and established engineering knowledge for this equipment class - not from a verified service record. Confirm against the manufacturer's service manual.
Will not start / error at start
HighSymptoms: Error message when starting, run will not begin.
Root cause: Set speed exceeds the rotor's admissible speed, an imbalanced load, or an unapproved rotor found by rotor detection.
Will not reach speed / excessive noise or vibration
MediumSymptoms: Slow spin-up, rumble or vibration.
Root cause: Load imbalance, worn anti-vibration mounts, or a drive/bearing fault.
Lid will not open
MediumSymptoms: Electric lid release does not work (especially after a power failure).
Root cause: Lid latch/solenoid fault or a power failure - use the mechanical emergency release only after the rotor has fully stopped.
Refrigeration not cooling (ST4F)
MediumSymptoms: Chamber does not reach set temperature.
Root cause: Compressor, condenser or door-seal fault.
Rotor / bucket corrosion or crack
HighSymptoms: Visible pitting or a crack on a rotor or bucket.
Root cause: Age, chemical exposure or fatigue - a safety-critical item.
Serviceable Parts & Consumables
Serviceable items for this model, compiled from its documentation and engineering knowledge for this equipment class. Service class and relative cost are estimates, not manufacturer figures; no part numbers are given. Confirm intervals and pricing against the manufacturer.
Lid latch / solenoid
Class Major service partRel. cost $$R&R Moderate
Rotor / buckets
Class Major service partRel. cost $$$R&R Easy
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Lid latch / solenoid | Major service part | $$ | Moderate |
| Rotor / buckets | Major service part | $$$ | Easy |
Relative cost: $ lowest · $$$$ highest service-part cost for this equipment class. Not a price.
PM Checklist
Preventive-maintenance tasks typical of this equipment class. Perform to the manufacturer's procedure and your facility's policy - this is general reference, not a schedule for this specific unit.
- ·Follow the manufacturer's PM schedule
- ·Perform incoming and annual electrical safety testing per facility biomedical program
Troubleshooting Approach
A starting sequence for this model, compiled from its documentation and engineering knowledge for this equipment class. Follow the manufacturer's service documentation for the actual procedure.
Symptom: Error at start
- Confirm the set speed does not exceed the fitted rotor's maximum.
- Rebalance the load - opposing positions must be evenly loaded.
- Confirm the rotor is an approved type and correctly seated.
- Consult the Troubleshooting by Guide section for the specific message.
- Restart the run.
Symptom: Lid will not open
- If there is power, press Stop and wait for the rotor to reach zero (END shown).
- On a power failure, wait until the rotor stops on its own (can take 40+ minutes - the brake does not work without power).
- Unplug the unit.
- Pry out the two rear plastic plugs and pull the release cord.
- Remove the samples and have the electric release checked.
Technical Specs
- MRI safety
- Labeling does not contain MRI Safety Information
- Sterile
- No
- Single use
- No
- FDA distribution status
- In Commercial Distribution
- Device type (GMDN)
- General-purpose centrifuge IVD
- FDA product classification
- Centrifuges (Micro, Ultra, Refrigerated) For Clinical Use
- Manufacturer support
- +496184906000 · marilyn.barry@thermofisher.com
Typical Location
Where this class of equipment is typically deployed - general reference, not this unit's own placement record.
- Varies by device - check the unit's own manual for facility placement guidance
Documents & Manuals
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Describe a symptom or error code. Bio answers from this device's own documented error codes, failure modes, parts, and guides.
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