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What This Guide Helps With
Troubleshoot external obstruction, disposable misloading, mechanical interference, control conditions, and visible damage affecting doors, valves, or roller-pump operation.
Step-by-Step Troubleshooting
1. Protect the Patient and Remove the Unit From Active Therapy
Do not troubleshoot a stalled door, valve, or pumping mechanism while the patient depends on the RI-2.
Move therapy to another verified device or method.
Expected outcome: Patient support continues independently of the malfunctioning unit.
2. Identify Which Function Is Not Operating
Determine whether the problem involves:
- A door that will not open or close
- A latch that will not engage
- An accessible valve mechanism that does not actuate
- A roller pump that does not move during normal operation
- Intermittent mechanical operation
Record any displayed message or abnormal sound.
Expected outcome: The affected mechanical function is clearly identified.
3. Inspect for External Obstruction
With the unit safely inactive, inspect accessible mechanical areas for:
- Misrouted tubing
- Disposable material caught in a door
- Debris
- Dried fluid
- Foreign objects
- Damaged disposable components
Do not use excessive force.
Expected outcome: No external obstruction prevents normal movement.
4. Remove and Inspect the Disposable
Remove the disposable and determine whether the door or accessible mechanism moves normally without it where appropriate.
Inspect the disposable for deformation or incorrect loading that may physically interfere with the mechanism.
Expected outcome: A disposable-related obstruction is identified or ruled out.
5. Install a Known-Good Disposable
Load a new compatible disposable correctly and verify that doors and accessible loading mechanisms close without resistance.
Expected outcome: Normal mechanical operation returns with the known-good disposable. If so, continue through final verification and stop when all tests pass.
6. Inspect Exterior Mechanical Components
Check doors, hinges, latches, guides, and accessible moving surfaces for:
- Cracks
- Bending
- Loose components
- Misalignment
- Evidence of impact
- Excessive contamination
Do not disassemble mechanical assemblies.
Expected outcome: Exterior components are intact and move normally.
7. Verify Normal Control State
Confirm the device is in a normal operating state and is not being prevented from operating by another active alarm, incomplete disposable setup, open door, or startup condition.
Do not enter restricted service menus or bypass interlocks.
Expected outcome: The mechanism receives a normal operating command under valid external conditions.
8. Observe Mechanical Operation During Bench Testing
Using a controlled setup and appropriate test fluid, observe whether the accessible valve and roller-pump functions operate smoothly without unusual noise, binding, or repeated stopping.
Keep hands and loose material away from moving parts.
Expected outcome: Mechanical operation is smooth and repeatable.
9. Complete Functional Verification
Verify:
- Proper disposable loading
- Normal door closure
- Stable fluid delivery
- No abnormal noise
- No repeated mechanical fault indication
- Appropriate audible and visual alarms
Expected outcome: The complete system operates normally. If all functions remain stable, troubleshooting can stop.
10. Escalate Mechanical Failure
If a door, valve, or pumping mechanism remains jammed, intermittent, damaged, or nonfunctional after external causes are ruled out, remove the unit from service.
Do not manually force, lubricate, realign, or disassemble internal drive components unless specifically authorized by service documentation and training.
Expected outcome: The device is referred for qualified mechanical evaluation.
If the Problem Persists
External obstruction, disposable misloading, contamination, and visible exterior damage have been ruled out.
The remaining cause may involve an internal actuator, motor, drive assembly, position sensor, interlock, or control circuit requiring service-level evaluation.
The device should be:
- Removed from service
- Labeled Out of Service
- Sent for repair or bench evaluation
- Evaluated using appropriate manufacturer documentation and approved test equipment
- Repaired or configured only by qualified personnel
Complete appropriate functional and safety testing after repair.
Knowing when to stop external troubleshooting and escalate is proper troubleshooting.
Clinical Use Tip
Never force a stuck door or pumping mechanism; a misloaded disposable or damaged mechanical component can become worse and compromise later fluid delivery.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Clinical staff reported that the RI-2 door would not close after installing the disposable."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering found disposable tubing trapped in the door-loading area."
Resolution
What action was taken.
Example:
"The disposable was correctly repositioned, the door operated normally, and the unit passed fluid-delivery functional testing."
Helpful Details to Include (If Known)
- Affected door, valve, or pump function
- Exact displayed message
- Abnormal sound
- Disposable position
- Visible obstruction
- Exterior mechanical damage
- Known-good disposable result
- Whether problem occurred without disposable installed
- Functional test result
- Final device status
Final Thought
Mechanical problems should be approached from the outside inward: rule out disposable misloading and obstruction first, never force a mechanism, and escalate any persistent or intermittent mechanical fault.
That is successful troubleshooting.