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What This Guide Helps With
Error 112 Pulse dmnd too low indicates insufficient motor drive in PWM mode, preventing the pump from delivering the programmed infusion and potentially causing therapy interruption.
Step-by-Step Troubleshooting
1. Ensure Patient Safety First
- Remove the pump from patient use immediately.
- Transfer infusion to a backup pump.
- Confirm therapy continues safely on another device.
2. Verify the Reported Error and Behavior
- Power on the pump and confirm Error 112 Pulse dmnd too low.
- Observe when the error occurs (startup, infusion start, or during operation).
- Check for no pumping action or inconsistent motor movement.
3. Check for Administration Set Issues
- Ensure the correct Baxter-compatible IV set is installed.
- Inspect tubing for kinks, occlusions, or excessive resistance.
- Verify proper seating in the pump channel.
- Replace with a known-good IV set if available.
4. Inspect Pump Channel and Door Mechanism
- Open the pump door and check for debris or fluid contamination.
- Inspect for worn or damaged channel components.
- Ensure the door fully closes and latches securely.
- Clean per approved procedures if necessary.
5. Verify Programming and Mode Settings
- Confirm correct infusion mode is selected.
- Verify flow rate is within normal operating range.
- Reprogram using a standard infusion rate and attempt operation.
6. Perform a Power Cycle
- Turn the pump off and wait 10–15 seconds.
- Restart the pump and observe behavior.
7. Attempt Operation with Known-Good Conditions
- Use a known-good IV set.
- Set a standard infusion rate.
- Ensure the channel is clean and properly loaded.
- Attempt infusion again.
If the Problem Persists
If Error 112 continues after all external checks, internal motor control, driver circuitry, or feedback systems are likely faulty.
- Remove the device from service.
- Label it as Out of Service.
- Send for repair or bench evaluation.
Clinical Use Tip
Never troubleshoot an infusion pump on an active patient. Always move the patient to a backup device before continuing troubleshooting.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Pump displaying Error 112 Pulse dmnd too low during infusion; unable to deliver fluid."
Cause
What was observed during troubleshooting.
Example:
"After replacing IV set and verifying setup, error persisted—indicating internal motor control or drive issue."
Resolution
What action was taken.
Example:
"Removed from service, labeled out of service, and sent to Biomed for repair evaluation."
Helpful Details to Include (If Known)
- Alarm behavior
- Accessories swapped
- Power behavior
- Environmental factors
- Indicator lights
- Final device status
Final Thought
Motor-related errors such as “Pulse dmnd too low” should always be approached by ruling out tubing resistance, setup, and configuration issues first. If unresolved, escalation ensures patient safety and prevents further equipment damage.
That is successful troubleshooting.