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What This Guide Helps With
Troubleshooting Hana table power failure, charging failure, weak battery operation, or loss of powered table movement.
Step-by-Step Troubleshooting
Ensure Patient Safety First
Confirm the table is not supporting a patient before troubleshooting powered movement or charging problems.
If the table fails during a case, support the patient, stop table movement attempts, and follow OR escalation procedures.
Expected outcome: Patient safety is protected before electrical or movement troubleshooting begins.
Why it matters: Surgical tables involve patient positioning, weight support, powered movement, and pinch-point hazards.
Verify the Reported Condition
- Table will not power on
- Battery will not charge
- Table powers on only when plugged in
- Table powers on but dies quickly
- Charger/power indicator does not illuminate
- Hand control or pendant appears dead
Expected outcome: The failure mode is clearly identified before parts or assemblies are suspected.
Check That the Table Is Not in Active Use or Locked Out
Verify the table is parked safely, brakes are applied if applicable, and no clinical accessories or positioning components are interfering with access to power controls.
Expected outcome: Troubleshooting can be performed safely without unintended table movement.
Check the AC Wall Outlet
Plug a known-good device or electrical safety tester into the same outlet used for charging the table.
Expected outcome: The outlet provides proper power.
If the outlet is dead, damaged, controlled by a wall switch, or connected to an inactive emergency power circuit, use a verified outlet and stop troubleshooting if charging resumes.
Inspect the Power Cord
Check the table power cord for cuts, crushed insulation, bent blades, loose strain relief, missing ground pin, or signs of heat damage.
Expected outcome: The cord is intact and safe to use.
If the cord is damaged, remove it from use and replace it with an approved cord before further troubleshooting.
Confirm the Power Cord Is Fully Seated
Verify the power cord is firmly connected at the wall and at the table’s power inlet or charging connection.
Expected outcome: Charging or power indicators illuminate after a secure connection is made.
If the table begins charging after reseating the cord, document the loose connection and stop.
Check for Charging Indicator Lights
With the table plugged into a verified outlet, observe any charge, power, battery, or status indicators.
Expected outcome: The table shows some indication that AC power is present or the battery is charging.
If there are no indicators, continue checking external power and connection points.
Inspect the Table Power Inlet or Charging Port
Look for debris, bent contacts, loose connector fit, cracked housing, fluid contamination, or signs of overheating at the table’s power connection.
Expected outcome: The charging port is clean, dry, physically secure, and not heat-damaged.
If damage, fluid intrusion, or overheating is found, remove the table from service.
Allow Time for a Severely Discharged Battery
If the table has been stored unplugged for an extended period, connect it to verified AC power and allow adequate charging time before retesting power-on.
Expected outcome: A deeply discharged battery may recover enough to power the control system after charging.
If the table still shows no charging activity or will not power on after a reasonable charge period, continue troubleshooting.
Check the Main Power Switch or Enable Control
Verify the main power switch, system enable control, or battery power switch is in the correct operating position.
Expected outcome: The table powers on or displays normal standby/ready status.
If the table powers on after correcting the switch position, document the finding and stop.
Inspect the Hand Control or Pendant Connection
Confirm the hand control is securely connected and that the connector is not loose, damaged, contaminated, or misaligned.
Expected outcome: The table recognizes the control device and responds normally.
Why it matters: A table may appear dead if the control interface is disconnected or not communicating.
Try a Known-Good Hand Control if Available
If the table has power indicators but no response from the controls, connect a known-good compatible hand control or pendant if available.
Expected outcome: The table responds normally with a known-good control.
If the table works with another control, tag the failed control for replacement and return the table only after full operational checks pass.
Check for Emergency Stop or Lockout Condition
Verify any emergency stop, lockout, or safety disable function is not engaged.
Expected outcome: Once cleared, the table powers on and responds normally.
If the issue resolves, document the lockout condition and verify all table movements before returning to service.
Inspect for Fluid Intrusion or Cleaning Chemical Exposure
Look around the power inlet, control connectors, hand control, base, and battery/charging area for moisture, residue, or signs of liquid entry.
Expected outcome: No fluid contamination is present.
If fluid intrusion is suspected, remove the table from service. Do not continue powered testing.
Listen for Abnormal Sounds or Smell
When connected to AC power, listen for clicking, buzzing, repeated relay cycling, or no activity at all. Check for unusual heat or electrical odor.
Expected outcome: No abnormal noise, heat, or smell is present.
If overheating, smoke, or electrical odor is detected, unplug the table immediately and remove it from service.
Check Battery Behavior Under Load
If the table powers on but shuts down quickly when movement is attempted, observe whether the battery indicator drops rapidly or the table only works while plugged in.
Expected outcome: The battery supports normal table operation without immediate shutdown.
If the table only operates on AC power or the battery rapidly depletes, suspect battery failure or charging circuit failure after external causes are ruled out.
Verify Charging After Power Cycle
Disconnect AC power, power the table off, wait briefly, reconnect AC power, and observe whether charging status changes.
Expected outcome: Charging status returns normally.
If the charging status remains absent or abnormal, continue to escalation.
Perform a Safe Functional Check if Power Is Restored
If the table powers on, test basic table functions without a patient and without load conditions that could create risk.
Confirm:
- Power on/off operation
- Battery indicator behavior
- Charging indicator behavior
- Hand control response
- Table movement stops when controls are released
- No abnormal noise, odor, heat, or hesitation
Expected outcome: The table powers on, charges normally, and responds safely.
If the table passes testing, return it to service according to facility policy.
If the Problem Persists
If the Hana Orthopedic Surgery Table still will not power on, will not charge, only operates while plugged in, or shows abnormal charging behavior after external checks are complete, common external causes have been ruled out.
The issue may involve the battery pack, charger circuit, internal power supply, control electronics, wiring, or safety interlock circuitry.
The table should be:
- Removed from service
- Labeled Out of Service
- Sent for repair or bench evaluation
Knowing when to stop is proper troubleshooting. Do not continue repeated power attempts if there is evidence of electrical odor, heat, fluid intrusion, damaged connectors, or unreliable powered movement.
Clinical Use Tip
Do not troubleshoot a surgical table power or charging issue while a patient is positioned on the table. If the table fails during a case, focus on patient support, safe positioning, and clinical escalation first. Technical troubleshooting should only continue when the table is unloaded and safe to evaluate.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"OR staff reported the Mizuho OSI Hana Orthopedic Surgery Table would not power on and the battery did not appear to charge when plugged in."
Cause
What was observed during troubleshooting.
Example:
"Verified outlet power was good, but the table showed no charging indication and would not power on after cord reseating and control connection checks."
Resolution
What action was taken.
Example:
"Removed table from service, labeled Out of Service, documented failed power/charging condition, and sent for bench evaluation of battery and charging system."
Helpful Details to Include (If Known)
- Outlet tested and verified
- Power cord inspected or swapped
- Charging indicator present or absent
- Battery indicator behavior
- Whether table works on AC power only
- Whether hand control was reseated or swapped
- Power inlet condition
- Any fluid exposure found
- Any unusual sound, heat, or smell
- Whether emergency stop or lockout was checked
- Final device status
Final Thought
Power and charging problems on a surgical table should be handled with a patient-safety mindset first. Start with the outlet, cord, charging connection, control connection, and obvious lockout conditions before suspecting internal failure. If the table cannot reliably power on or charge, removing it from service is the correct decision. Clear CCR documentation helps the repair team understand what was checked and why escalation was necessary.
That is successful troubleshooting.