NIMBUS
Arjohuntleigh AB · Model 649003
Alternating Pressure Surface Pump - NIMBUS Pump.
Intended use: An assembly of devices consisting of an alternating-pressure bed mattress overlay and a dedicated pump, which also functions as the control unit, designed to actively alternate a bed occupant's bed-contact points, typically to relieve pressure points for comfort and to prevent pressure sores. It is commonly used for elderly immobilized (especially in cases of decubitus ulcers), patients with disabilities, or patients with low body fat.
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.
Surface will not inflate / not firm enough
HighSymptoms: Patient bottoms out, low-pressure alarm, surface stays soft.
Root cause: Pump / blower fault, a hose disconnect or kink, or an air-cell / bladder leak.
One cell / zone stays flat
MediumSymptoms: Localised loss of support.
Root cause: Perforated air cell or a failed cell connector.
Alternating / low-air-loss therapy not working
MediumSymptoms: Cells do not alternate, or microclimate airflow weak.
Root cause: Rotary valve / distribution manifold, or a clogged air filter.
CPR deflation slow
MediumSymptoms: Surface does not deflate quickly on the CPR control.
Root cause: CPR dump valve or hose fault.
Cover damage
MediumSymptoms: Tears or cracking in the cover, fluid ingress.
Root cause: Wear or sharp objects - do not use with a compromised cover.
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.
Pump / blower unit
Class Periodic replacementRel. cost $$$R&R Fairly easy
Air cell / bladder set
Class Periodic replacementRel. cost $$R&R Fairly easy
Rotary valve / distribution manifold
Class Periodic replacementRel. cost $$R&R Moderate
Air filter
Class Frequent wear itemRel. cost $R&R Easy
Mattress cover
Class Periodic replacementRel. cost $$R&R Fairly easy
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Pump / blower unit | Periodic replacement | $$$ | Fairly easy |
| Air cell / bladder set | Periodic replacement | $$ | Fairly easy |
| Rotary valve / distribution manifold | Periodic replacement | $$ | Moderate |
| Air filter | Frequent wear item | $ | Easy |
| Mattress cover | Periodic replacement | $$ | Fairly 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: Surface will not firm up
- Confirm the pump runs and power is on.
- Check the supply hose connections and inspect for kinks.
- Listen / feel for pump output.
- Replace the pump if it runs without output.
- Verify the surface holds pressure under a representative load.
Symptom: Cells not alternating / poor airflow
- Confirm the therapy mode selected.
- Listen for the rotary valve cycling.
- Replace the air filter.
- Replace the rotary valve / manifold if it will not cycle.
- Confirm a full therapy cycle.
Technical Specs
- MRI safety
- Labeling does not contain MRI Safety Information
- Sterile
- No
- Single use
- No
- Prescription use
- OTC
- FDA distribution status
- In Commercial Distribution
- Device type (GMDN)
- Alternating-pressure bed mattress overlay system
- FDA product classification
- MATTRESS, AIR FLOTATION, ALTERNATING PRESSURE
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
No documents available for this device yet.
Troubleshoot this device with Bio
Describe a symptom or error code. Bio answers from this device's own documented error codes, failure modes, parts, and guides.
Ask Bio