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What This Guide Helps With
Error 117 PWM MAX indicating excessive motor drive (PWM) during pumping, often causing flow irregularities or pump shutdown.
Step-by-Step Troubleshooting
Ensure Patient Safety First
- Remove the pump from patient use immediately
- Transfer infusion to another pump if therapy is active
- Ensure no interruption to patient care
Verify the Reported Error and Behavior
- Power on the pump and attempt to start an infusion
- Confirm Error 117 PWM MAX appears
- Observe when it occurs (startup, during infusion, intermittently)
- Determine if the issue is consistent or intermittent
Check IV Set Installation and Compatibility
- Verify correct Baxter-approved IV set is installed
- Ensure proper routing through pump channel
- Confirm no misalignment in pumping segment
- Ensure pump door is fully latched
Inspect for Flow Resistance or Occlusion
- Check IV line for kinks or closed clamps
- Inspect for blocked filters
- Evaluate for high backpressure (e.g., small-gauge catheter)
- Flush or replace the IV set if needed
Check Pump Channel and Mechanism
- Open pump door and inspect for debris or dried fluid
- Look for worn or sticky pumping fingers
- Check for contamination in the channel
- Clean externally per approved procedures
Test with a Known-Good IV Set
- Install a new, known-good IV set
- Retry infusion and monitor for error
- Compare performance with previous setup
Observe for Recurrent Motor Behavior
- Listen for straining or irregular motor sounds
- Check for hesitation or inconsistent pumping
- Confirm smooth and consistent operation
If the Problem Persists
If Error 117 PWM MAX continues after all external checks, external causes have been ruled out. The issue likely indicates internal motor control or drive system failure.
- Remove the device from service
- Label the device Out of Service
- Send for repair or bench evaluation
Clinical Use Tip
Do not troubleshoot infusion pumps while connected to a patient. Always transfer therapy before addressing motor or flow-related errors.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Pump displaying Error 117 PWM MAX during infusion; infusion stopped."
Cause
What was observed during troubleshooting.
Example:
"Resistance ruled out; error persists with multiple IV sets indicating internal motor control issue."
Resolution
What action was taken.
Example:
"Removed from service, labeled out of service, and sent to Biomed/vendor for repair."
Helpful Details to Include (If Known)
- Alarm behavior
- Accessories swapped
- Power behavior
- Environmental factors
- Indicator lights
- Final device status
Final Thought
Motor-related errors like PWM MAX often begin as external resistance issues but can indicate deeper drive failures. Always rule out simple causes first, then escalate appropriately to protect patient safety and ensure reliable infusion performance.
That is successful troubleshooting.