On this page
Asset Type
Manufacturer
Model
What This Guide Helps With
Troubleshooting a Bransonic ultrasonic cleaner that will not begin a cycle due to power, lid, settings, fluid level, or control issues.
Step-by-Step Troubleshooting
Ensure Patient Safety First
Confirm the unit is not being used for active instrument processing and that staff have an alternate cleaner available if needed.
Do not reach into the tank while the unit is energized, and do not operate the cleaner empty.
Expected outcome: The unit can be evaluated safely without risk of electrical shock, burns, or improper instrument reprocessing.
Verify the Reported Problem
Ask staff what happens when they try to start the unit.
Check whether the unit has:
- No display or no lights
- Display present but no cycle start
- Button response but no ultrasonic activity
- Timer set but unit does not run
- Intermittent starting
Expected outcome: The failure mode is confirmed before troubleshooting continues.
Check the Power Source
Verify the power cord is fully seated at the unit and plugged into a known-good outlet.
Test the outlet with another device or outlet tester if available.
Expected outcome: The unit receives proper facility power.
If the unit powers on after correcting the outlet or plug connection, return it to service after confirming normal operation and stop troubleshooting.
Inspect the Power Cord and Plug
Check the power cord for cuts, crushed areas, loose strain relief, bent plug blades, burn marks, or signs of overheating.
Expected outcome: The cord and plug are intact and safe to use.
If damage is found, remove the unit from service. Do not continue testing with a damaged cord.
Confirm the Power Switch or Control Panel Is On
Verify the main power switch, if equipped, is in the ON position.
On digital models, confirm the display illuminates and the control panel responds. On analog models, confirm the timer and heat controls move normally.
Expected outcome: The unit shows normal standby behavior.
Check Timer or Cycle Settings
Confirm a valid cleaning time has been selected.
Some ultrasonic cleaners will not start if the timer is set to zero, paused, or not fully engaged.
Expected outcome: A valid cycle time is selected and the unit is ready to run.
If the unit starts after correcting the timer setting, verify normal ultrasonic activity and stop troubleshooting.
Verify Tank Fluid Level
Confirm the tank is filled to the proper operating level with approved cleaning solution or water-based solution per facility process.
Do not test ultrasonic operation with an empty or underfilled tank.
Expected outcome: The tank has enough fluid for safe ultrasonic operation.
If the unit starts after correcting the fluid level, document the finding and return it to service if performance is normal.
Check for Lid, Basket, or Accessory Interference
Inspect the lid, basket, tray, and instrument load for improper placement.
Make sure nothing is pressing against the control panel, preventing lid closure where applicable, or binding against the tank.
Expected outcome: Accessories are correctly installed and not interfering with startup.
Inspect for Visible Liquid Intrusion or Spillage
Look around the control panel, front panel, power switch, rear connections, and underside for signs of spilled fluid, corrosion, residue, or leakage.
Expected outcome: No evidence of fluid entry or external leakage is present.
If fluid intrusion is suspected, remove the unit from service. Do not continue applying power.
Check for Overheating or Abnormal Odor
Before attempting repeated starts, check for unusual heat, burning smell, buzzing, smoke, or discoloration.
Expected outcome: The unit shows no signs of electrical overheating.
If overheating, smoke, or burning odor is present, unplug the unit, label it Out of Service, and escalate for repair.
Power Cycle the Unit
Turn the unit off, unplug it, wait at least one minute, then reconnect it to a verified outlet.
Attempt to start a normal short cycle with the tank properly filled.
Expected outcome: The unit resets and starts normally.
If the unit starts and runs normally, document the reset and verify operation before returning it to service.
Test Basic Ultrasonic Operation
If the unit starts but there is no cleaning action, listen for normal ultrasonic activity and observe for proper cavitation behavior using facility-approved testing methods.
Expected outcome: The unit starts and produces normal ultrasonic action.
If the controls start but no ultrasonic activity occurs, treat this as a performance failure rather than a simple start failure.
Do Not Continue Repeated Start Attempts
If the unit still will not start after power, outlet, cord, timer, fluid level, accessories, and obvious external issues are checked, stop troubleshooting.
Expected outcome: Further use is avoided until the unit is evaluated.
If the Problem Persists
Common external causes have been ruled out. The issue may involve the internal power supply, control board, timer assembly, keypad, switch, relay, fuse, wiring, or ultrasonic generator circuitry.
The unit should be:
- Removed from service
- Labeled Out of Service
- Sent for repair or bench evaluation
Knowing when to stop is proper troubleshooting. Do not perform internal disassembly or board-level repair unless qualified, authorized, and supported by the appropriate service documentation.
Clinical Use Tip
Do not allow staff to continue instrument processing with an ultrasonic cleaner that will not reliably start. If instrument cleaning is delayed, notify Sterile Processing or the clinical department so they can use an alternate approved cleaning process.
Do not troubleshoot on active patient care or active instrument-processing workflow. Move affected work to a backup device or alternate approved process first so therapy continuity and processing continuity are protected.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Staff reported the Branson Bransonic ultrasonic cleaner would not start when a cleaning cycle was selected."
Cause
What was observed during troubleshooting.
Example:
"Verified outlet power and cord condition; unit displayed power but would not begin a cycle after timer and fluid level were confirmed."
Resolution
What action was taken.
Example:
"Removed unit from service, labeled it Out of Service, and sent it for bench evaluation for suspected internal control or power-start circuit failure."
Helpful Details to Include (If Known)
- Outlet tested or alternate outlet used
- Power cord condition
- Display or indicator light behavior
- Timer setting verified
- Tank fluid level confirmed
- Lid, basket, and accessory placement checked
- Any abnormal odor, heat, buzzing, or smoke
- Whether the unit is analog or digital control
- Whether the issue is intermittent or constant
- Final device status
Final Thought
A Bransonic ultrasonic cleaner that will not start should be approached logically: confirm safety, verify power, check settings, inspect accessories, and rule out external causes first. If those checks do not restore operation, removing the unit from service protects instrument processing quality and prevents unsafe repeated start attempts. Clear CCR documentation helps repair staff focus on the likely failure area.
That is successful troubleshooting.