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What This Guide Helps With
Troubleshoot bed articulation that fails or stalls under load due to power, lockouts, obstructions, positioning, or mechanical resistance.
Step-by-Step Troubleshooting
1. Ensure Patient Safety and Stable Support
Stop operating an actuator that stalls, binds, or moves unpredictably.
- Confirm that the patient is safely supported.
- Arrange an alternate bed if positioning or height adjustment is required for safe care.
- Engage the brakes.
- Do not repeatedly operate a stalled actuator.
- Never place hands beneath an unsupported moving deck section.
- Do not exceed the manufacturer's applicable load limits.
Expected outcome: The patient is protected and the bed is stable for evaluation.
2. Confirm Which Motion Is Affected
Identify the specific articulation failure.
- Determine whether the head, knee, foot, or high-low function is affected.
- Ask whether movement stops completely or only under load.
- Record the direction of movement affected.
- Identify whether the problem occurs intermittently.
- Check for unusual sounds or visible mechanical binding.
Expected outcome: The failed movement and operating conditions are documented.
3. Verify Power Availability
Inspect the bed's electrical power condition.
- Confirm the power cord is connected.
- Inspect the cord and plug.
- Verify the outlet using approved test equipment.
- Check available battery or power indicators.
- Determine whether other powered functions operate normally.
Expected outcome: Reliable electrical power is available.
4. Check Lockouts and Control Response
Inspect applicable articulation controls.
- Verify that the function is not intentionally locked out.
- Check whether the control responds from another authorized location, if available.
- Inspect buttons and switches for damage.
- Confirm that the selected control corresponds to the intended movement.
- Do not bypass protective interlocks.
Expected outcome: The affected function receives a valid command through normal controls.
5. Inspect for External Obstructions
Examine accessible areas around the deck.
- Check for trapped bedding, tubing, and accessories.
- Inspect the space beneath the bed.
- Look for contact with walls, furniture, or attached equipment.
- Check that mattress components do not interfere with articulation.
- Verify that width expansion components are correctly positioned.
Expected outcome: No external obstruction prevents the intended movement.
6. Verify Load and Positioning Conditions
Determine whether the reported condition is related to loading.
- Confirm the bed is being used within the applicable manufacturer limits.
- Review patient and accessory loading information.
- Check for unevenly distributed external equipment loads.
- Determine whether the malfunction occurs only in a particular bed position.
- Do not perform improvised loaded testing with personnel or unapproved weights.
Expected outcome: The bed configuration is appropriate and no external loading condition explains the malfunction.
7. Perform an Unoccupied Articulation Test
With the bed unoccupied, operate the affected function within the approved range.
- Observe the start of movement.
- Check for smooth travel.
- Listen for clicking, grinding, or unusual motor noise.
- Stop if the mechanism stalls or binds.
- Compare operation with other unaffected functions.
Expected outcome: The affected section moves smoothly without binding or abnormal noise.
If movement works unoccupied but fails under an approved load, do not consider the problem resolved.
8. Complete Required Functional Verification
After correcting an external issue:
- Verify the affected movement through its approved range.
- Confirm control response from applicable locations.
- Check lockout behavior.
- Verify the function under manufacturer-approved test conditions, including load testing when required.
- Complete applicable electrical and mechanical safety checks.
Expected outcome: The actuator passes the required functional verification without stalling, binding, or unexpected movement.
Troubleshooting can stop only after the reported load-related condition has been adequately verified.
If the Problem Persists
If power, controls, lockouts, obstructions, positioning, and loading conditions have been checked, common external causes have been ruled out.
Possible service-level causes include actuator drive components, mechanical linkages, load-related resistance, motor control, position sensing, or associated wiring.
The bed should be:
- Removed from service and labeled Out of Service.
- Sent for qualified repair or bench evaluation.
- Evaluated using Hillrom documentation and approved test equipment.
- Repaired or adjusted only by qualified personnel.
- Returned to service after successful articulation, load-related, and safety verification.
Do not return a bed to service based only on successful unloaded movement when the reported failure occurred under load.
Clinical Use Tip
A bed that cannot reliably adjust height or patient position can create transfer, fall, and caregiver injury risks even when the mattress remains supportive.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Nursing reported that the Compella head section would not raise while the patient was positioned in the bed."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering found an attached accessory cable trapped in the head articulation path, restricting movement."
Resolution
What action was taken.
Example:
"Removed the obstruction and verified smooth head articulation and normal control operation under the approved functional test conditions."
Helpful Details to Include (If Known)
- Affected actuator function
- Direction of failed movement
- Loaded versus unloaded behavior
- Power and battery status
- Lockout condition
- Control locations tested
- Visible obstructions
- Unusual motor or mechanical noise
- Approved functional test results
- Final equipment status
Final Thought
Articulation problems require careful attention to patient support, mechanical clearance, and loading. Verify external conditions before suspecting actuator failure, avoid forcing stalled mechanisms, escalate unresolved faults, and document successful return-to-service testing.
That is successful troubleshooting.