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What This Guide Helps With
Troubleshooting lift movement that stalls, binds, stops unexpectedly, or fails to complete travel due to power, control, obstruction, or safety-zone activation.
Step-by-Step Troubleshooting
1. Ensure Patient Safety First
Remove the table from patient use before troubleshooting any abnormal lift movement.
If a patient is on the table, have clinical staff safely transfer the patient to another exam table or appropriate surface before continuing.
Expected outcome: The table can be evaluated without risk of unintended movement, pinch injury, instability, or interrupted patient care.
Why it matters: Unexpected lift movement or abnormal stopping can create fall, entrapment, or positioning hazards.
2. Confirm the Reported Lift-Movement Behavior
With the table unloaded and clear of staff, operate the height control and determine the exact symptom:
- Does the table fail to raise?
- Does it fail to lower?
- Does it stop only in one direction?
- Does it move briefly and then stop?
- Does one side appear to lag, bind, or tilt?
- Is there motor hum, clicking, grinding, or unusual noise?
Stop testing immediately if the table tilts, binds severely, jerks unexpectedly, produces a burning smell, or makes abnormal mechanical noise.
Expected outcome: The failure pattern is clearly identified for further troubleshooting and documentation.
3. Verify the Table Power Switch Is On
Locate the table ON/OFF switch at the rear of the cabinet and confirm it is in the ON position.
Cycle the switch OFF and back ON once, then attempt lift movement again using the foot control.
Expected outcome: If the switch was off or not fully engaged, table movement returns normally.
If resolved: Confirm proper lift travel and return the table to service only after safe operation is verified.
Brewer’s operating test for the Access High-Low 6000 Series begins by verifying that the rear ON/OFF switch is on before lift testing.
4. Check the Wall Outlet, Power Cord, and Table Power Connection
Inspect the external power path:
- Confirm the power cord is fully inserted at the table and wall outlet.
- Inspect the cord and plug for damage, pinching, cuts, discoloration, or looseness.
- Test the outlet with an approved outlet tester or known-working device according to facility practice.
- Move the table to a known-working approved outlet, when appropriate.
Do not continue use if the cord, plug, or power entry area appears damaged or overheated.
Expected outcome: The table receives reliable power and lift movement returns normally if the issue was related to external power.
If resolved: Complete a functional lift check before returning the table to service.
5. Inspect the Foot Control and Its External Connection
Check the lift control device for external problems:
- Confirm the correct table-height pedal is being pressed.
- Inspect the foot control for damage, fluid contamination, stuck pedals, or debris preventing normal pedal return.
- Inspect the foot-control cable for cuts, crushing, stretching, or signs it has been rolled over.
- Confirm any accessible external connector is fully seated and undamaged.
Operate the table using the TABLE UP and TABLE DOWN controls separately.
Expected outcome: A loose, obstructed, or damaged foot control is identified, or lift commands operate normally again.
If resolved: Confirm repeated up-and-down movement without intermittent stopping before returning the table to service.
6. Check for External Obstructions Around the Lift and Safety Zones
With the table unplugged before reaching near any moving area, inspect for objects that may contact or obstruct the table during movement, including:
- Linens, cables, exam-paper rolls, trash, or supplies caught beneath or behind the table
- Items stored against the rear or lower cabinet
- Equipment cords routed through the table’s movement path
- Debris or foreign material contacting the lower safety area
Remove any obstruction, restore power, and retest the lift with the area clear.
Expected outcome: The table moves smoothly if an external obstruction or safety-zone contact caused the stop.
Why it matters: Brewer Access High-Low tables incorporate protective stopping behavior during movement, so an obstruction can make normal safety operation appear to be a lift failure. Brewer describes safety zones intended to reduce injury during table movement.
7. Determine Whether the Table Is Stopping Due to Normal Safety Operation
With no patient on the table and the movement area clear, observe whether the table stops only when the lower cabinet area, seat-back area, or another safety zone is contacted.
Do not place hands beneath a moving table or intentionally bypass any safety feature.
If the table stops without visible contact, will not resume movement once the area is clear, or appears to respond inconsistently, remove it from service for evaluation.
Expected outcome: Normal protective stopping is distinguished from an abnormal intermittent stop or failed safety circuit.
8. Perform a Basic Unloaded Lift Travel Check
With the table unloaded and clear of obstructions:
- Press and hold TABLE UP.
- Observe whether the table rises smoothly to the full upper position and stops.
- Listen for continued motor hum after motion stops.
- Press and hold TABLE DOWN.
- Observe whether the table lowers smoothly to the full down position.
The table should travel smoothly, stop at its intended end positions, and not continue humming after reaching its upper stop. Brewer identifies approximately 37 inches as the full upper position for the 6000 Series lift test.
Expected outcome: Normal full travel is confirmed, or the abnormal direction and stopping point are reproduced.
If resolved: Complete repeated operation checks before considering return to service.
9. Observe for Signs of Intermittent Overuse or Thermal Stoppage
Ask clinical staff whether the problem occurred after repeated height adjustments or heavy use.
Allow the unloaded table to remain powered off and unused before retesting. Do not repeatedly cycle a table that is stalling or stopping abnormally.
Expected outcome: If the problem was caused by temporary overheating after heavy use, operation may return after cooling; the event should still be documented.
If the issue returns: Remove the table from service for bench evaluation.
Brewer’s troubleshooting chart notes that lift operation stopping after heavy use may involve a control-box overtemperature condition that resets after cooling.
10. Evaluate for Binding, Uneven Movement, or Suspected Lift Component Failure
During unloaded testing, watch for:
- One side rising or lowering differently than the other
- Table movement stopping before full travel
- Repeated humming without movement
- Binding, jerking, grinding, or mechanical strain
- Lift movement that becomes unreliable after external causes are ruled out
Do not attempt continued operation or internal adjustment when the table movement is uneven, mechanically bound, or unable to complete normal travel.
Expected outcome: A probable internal lift, actuator, safety-switch, or control-system issue is identified for repair evaluation.
If the Problem Persists
If power, outlet condition, cord connection, foot control condition, visible obstructions, safety-zone interference, and unloaded movement checks do not resolve the problem, common external causes have been ruled out.
The table likely requires internal repair or bench evaluation of the lift system, actuator operation, safety-switch circuit, foot-control circuit, or control electronics.
The device should be:
- Removed from service
- Labeled Out of Service
- Sent for repair or bench evaluation
A table that stalls, binds, moves unevenly, or stops unpredictably should not be returned to patient use based on intermittent successful movement alone.
Knowing when to stop troubleshooting and escalate for repair is proper Clinical Engineering practice.
Clinical Use Tip
Do not troubleshoot lift movement while a patient is on the table. Transfer the patient first, keep hands and equipment clear of movement and pinch zones, and verify safe unloaded operation before return to service.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Clinical staff reported that the Brewer Access High-Low exam table begins lowering but stops unexpectedly before reaching its lowest position."
Cause
What was observed during troubleshooting.
Example:
"Inspection found no external obstruction or power issue; the unloaded table repeatedly stalled during downward travel with abnormal lift behavior."
Resolution
What action was taken.
Example:
"Removed the table from clinical service, labeled it Out of Service, and routed it for bench evaluation of the lift and safety-control system."
Helpful Details to Include (If Known)
- Outlet tested and result
- Power cord and plug condition
- Rear ON/OFF switch position
- Foot-control condition and pedal response
- Direction of failed movement: up, down, or both
- Whether the table reaches full upper or lower position
- Whether motor hum or relay clicking is heard
- Whether the stop occurs after repeated use
- Visible obstruction or safety-zone activation observed
- Uneven movement, binding, unusual sound, heat, or odor
- Final device status
Final Thought
Safe troubleshooting begins with removing the patient risk, then checking the simplest external causes before assuming an internal lift failure. When movement remains abnormal, removing the table from service and documenting the findings clearly protects patients and supports an efficient repair process.
That is successful troubleshooting.