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Asset Type
Continuous Renal Replacement Therapy (CRRT)
Manufacturer
Model
What This Guide Helps With
This guide helps troubleshoot the Scales Circuit Board alarm on a Baxter PrismaFlex when the system detects a scale hardware failure that may affect fluid balance monitoring.
CRRT therapy depends on accurate scale measurement for fluid balance. A scale circuit board or scale hardware failure can affect therapy accuracy and patient safety, so this alarm should be treated as a serious fluid-management issue.
Step-by-Step Troubleshooting
Ensure Patient Safety First
- If the PrismaFlex displays Scales Circuit Board, treat the alarm as a serious fluid-management issue.
- Clinical staff should follow facility procedure to safely end treatment through DISCONNECT if treatment cannot continue safely.
- Do not attempt to bypass the alarm or continue therapy using unreliable scale data.
- Do not troubleshoot the device while a patient is actively dependent on it.
Verify the Reported Alarm and Behavior
- Confirm the exact alarm displayed is Scales Circuit Board.
- Document when the alarm appears.
- Note whether it occurs during startup, self-test, treatment, or after movement.
- Record whether any scale-related alarms occurred before it.
- Document whether treatment was stopped or could not proceed.
- Check whether any bags, scales, or hanging hardware appear abnormal.
Check External and Simple Causes First
- Inspect the PrismaFlex externally before assuming internal failure.
- Verify all scale hooks and bag supports are free to move normally.
- Confirm no bag, tubing, clamp, power cord, or accessory is pulling against the scale assemblies.
- Check that scale hardware is not physically restricted or externally loaded incorrectly.
Verify Proper Bag and Scale Setup
- Confirm bags are hanging on the correct scales.
- Verify bags are not resting on the cart, floor, neighboring bags, or tubing.
- Check for overloaded bags.
- Check for incorrect bag placement.
- Check for tubing pulling down on a scale.
- Check for bags touching each other.
- Check for fluid bags swinging excessively.
- Inspect for damaged or bent scale hooks.
Inspect for Physical Damage or Contamination
- With the device removed from treatment use, inspect the scale area for fluid intrusion.
- Look for cracked or bent scale housings.
- Check for loose scale hooks.
- Look for signs of impact damage.
- Check for dried fluid or residue around scale assemblies.
- Note any unusual noise, heat, or smell.
Power Cycle Only if Clinically Appropriate
- After treatment has been safely ended and the device is not connected to the patient, power the unit down and restart it according to facility practice.
- Do not power cycle during active therapy unless directed by clinical procedure.
- Document whether the alarm clears during startup or returns.
- A persistent alarm after restart supports a true device-side failure rather than a transient operating state.
Check Scale Operation in Diagnostics
- Access the appropriate service or diagnostic area.
- Check scale operation using Diagnose Screen – Scale Diagnose.
- Observe whether one or more scales show abnormal, frozen, missing, unstable, or clearly incorrect readings.
- Document which scale appears abnormal, if known.
Isolate Whether the Problem Is External or Device-Related
- Determine whether the issue appears related to incorrect bag loading.
- Rule out scale obstruction or binding.
- Check for external damage.
- Check for fluid contamination.
- Evaluate whether scale hardware malfunction is likely.
- Escalate when the evidence points to a scales circuit board failure.
Stop When Resolved
- If correcting bag position, removing tubing tension, clearing obstruction, or addressing an external issue resolves the alarm, run the applicable operational checks.
- Verify scale readings respond normally.
- Confirm no scale-related alarms return.
- Document the correction.
- Return the PrismaFlex to service only after functional verification.
If the Problem Persists
If the Scales Circuit Board alarm remains after external checks, proper bag setup, power reset, and scale diagnostics, the most likely condition is an internal scale hardware or scales circuit board failure.
At that point, external causes such as improper bag loading, tubing tension, scale obstruction, visible damage, and setup issues have been ruled out.
Remove the PrismaFlex from service. Label it Out of Service. Do not return it for patient use. Send it for bench evaluation or repair.
Replace the affected scale hardware if malfunction is confirmed.
Persistent scale circuit board alarms should not be treated as routine nuisance alarms. Knowing when to stop is proper troubleshooting.
Clinical Use Tip
Never troubleshoot a scale hardware alarm on an active patient. Move the patient to a backup device or safe clinical plan first according to facility procedure.
CRRT therapy relies on accurate scale data for fluid balance, so unresolved scale alarms require escalation before continued patient use.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"PrismaFlex reported Scales Circuit Board alarm during CRRT operation. Alarm indicated hardware failure on the scales circuit board and treatment was ended through DISCONNECT per procedure."
Cause
What was observed during troubleshooting.
Example:
"External bag loading, scale obstruction, tubing tension, and physical damage were checked. Alarm persisted during evaluation, indicating likely internal scale hardware or scales circuit board failure."
Resolution
What action was taken.
Example:
"Removed device from service and labeled Out of Service. Checked scale operation in Diagnose Screen – Scale Diagnose. Unit referred for bench repair and affected scale hardware replacement if confirmed."
Helpful Details to Include (If Known)
- Alarm behavior
- Accessories swapped
- Power behavior
- Environmental factors
- Indicator lights
- Final device status
Final Thought
A PrismaFlex scale circuit board alarm must be handled with patient safety first because scale accuracy is central to CRRT fluid management. Start with external checks, confirm scale behavior through diagnostics, and escalate when the alarm points to internal hardware failure. Clear documentation protects the patient, the clinical team, and the repair process.
That is successful troubleshooting.