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What This Guide Helps With
Hi-lo function not responding or moving slowly due to power, controls, or mechanical resistance issues.
Step-by-Step Troubleshooting
Ensure Patient Safety First
- Remove the stretcher from active patient use if height adjustment is unreliable.
- Transfer the patient to another safe surface.
Why it matters: Uncontrolled height movement can create fall risk or caregiver injury.
Verify the Reported Issue
- Operate the hi-lo control and observe:
- No movement at all
- Slow or uneven movement
- Audible motor noise without movement
Expected: Clear confirmation of failure type
Why it matters: Helps differentiate electrical vs mechanical issues
Check Power Source (If Powered Model)
- Plug stretcher into a known working outlet
- Confirm any power indicators are illuminated
- Verify power cord is intact and fully seated
Expected: Power present and stable
Why it matters: Loss of AC power will prevent actuator operation or force battery-only operation
Check Battery Condition (If Equipped)
- Attempt operation on battery power
- Observe for weak or sluggish movement
- Check for low battery indicators
Expected: Normal speed movement on a charged battery
Why it matters: Weak batteries commonly cause slow actuator performance
Inspect Hand Control or Foot Pedals
- Test multiple control inputs (hand pendant and/or foot pedals)
- Check for stuck, damaged, or unresponsive buttons
Expected: Consistent response from all control points
Why it matters: A failed switch can mimic actuator failure
Check for Obstructions or Load Issues
- Inspect under the stretcher for debris or objects restricting movement
- Verify weight load is within normal limits
- Remove excess weight if possible and retest
Expected: Free, unobstructed movement
Why it matters: Mechanical resistance can slow or stop actuator travel
Inspect Actuator Movement and Sound
- Activate hi-lo while observing the actuator
- Listen for:
- Motor running with no movement
- Clicking or grinding
- No sound at all
Expected: Smooth, steady actuator movement
Why it matters:
- Noise with no movement = possible mechanical failure
- No noise = possible electrical/control issue
Check Wiring and Connections (External Only)
- Inspect visible actuator cables and connectors
- Ensure connections are secure and undamaged
- Look for pinched or cut wiring
Expected: Secure, intact connections
Why it matters: Loose or damaged wiring can interrupt actuator power
Perform Power Reset (If Applicable)
- Disconnect from AC power
- Wait 30 seconds
- Reconnect and retest
Expected: System resets and may restore function
Why it matters: Clears minor control or power faults
If the Problem Persists
If all external causes have been ruled out, the issue is likely internal to the actuator, control box, or wiring harness.
Remove the stretcher from service, label it Out of Service, and send for repair or bench evaluation.
Knowing when to stop prevents unnecessary risk and ensures proper repair handling.
Clinical Use Tip
Never troubleshoot height adjustment with a patient on the stretcher. Always move the patient first to avoid sudden drops or instability.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Stretcher hi-lo function not moving when controls activated."
Cause
What was observed during troubleshooting.
Example:
"Actuator failed to respond due to internal motor degradation and weak battery condition."
Resolution
What action was taken.
Example:
"Removed stretcher from service and sent to biomed shop for actuator replacement and battery evaluation."
Helpful Details to Include (If Known)
- Outlet tested and verified
- Battery condition observed
- Control inputs tested (hand/foot)
- Actuator noise present or absent
- Obstruction check completed
- Wiring condition inspected
- Final device status (in service or removed)
Final Thought
Hi-lo issues are often caused by simple external factors like power or controls, but can quickly become safety concerns. A structured approach ensures patient safety while avoiding unnecessary part replacement. Recognizing when the issue is beyond external troubleshooting is key to effective Clinical Engineering practice.
That is successful troubleshooting.