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What This Guide Helps With
Troubleshoots a CrossFlow display or control interface that is blank, frozen, intermittent, inaccurate, or unresponsive to normal input.
Step-by-Step Troubleshooting
1. Protect the Patient and Stop Dependence on Unreliable Controls
If controls cannot be trusted during a procedure, notify the clinical team and transition to a verified alternate system or safe approved method. Do not continue manipulating an unreliable interface while patient care depends on it.
Expected outcome: Clinical care continues without dependence on the affected controls. If safe control cannot be assured, the CrossFlow remains out of use.
2. Confirm Which Interface Function Has Failed
Determine whether the problem involves:
- Blank display
- Frozen display
- Touch input if applicable
- Buttons or adjustment controls
- Delayed response
- Intermittent response
- Incorrect response to a control input
- Only one specific control or the entire interface
Expected outcome: The failed function is clearly identified and reproducible. If controls are functioning normally during evaluation, investigate conditions present when the failure occurred.
3. Verify Normal Power and Startup
Confirm the console receives reliable AC power and completes startup normally. A partially completed startup or unstable power source can appear to be an interface problem.
Expected outcome: The system reaches its normal operating state. If restoring stable power corrects the interface, proceed to final functional testing.
4. Inspect the Display and Controls Externally
Inspect for:
- Cracked or damaged surfaces
- Fluid or cleaning residue
- Protective material interfering with controls
- Stuck buttons
- Debris around accessible controls
- Evidence of impact
- Loose external connections
Use only approved cleaning methods.
Expected outcome: The interface is clean, unobstructed, and physically intact. If removing an external obstruction restores normal response, the issue is resolved pending verification.
5. Confirm the Report Is Not a Locked or Inactive Control State
Verify the CrossFlow is in an operating state where the requested control should be available. Some controls may not respond when a function is inactive, an accessory is absent, or the system is waiting for another required condition.
Do not change protected settings solely to make a control active.
Expected outcome: The control is evaluated under the correct operating condition. If normal response returns, no hardware repair is indicated.
6. Disconnect Suspect External Accessories
Power down the system and disconnect nonessential external accessories or interfaces. Restart the console and evaluate the display and controls in the simplest appropriate configuration.
Expected outcome: Interface response returns if an external accessory or connection was interfering. Reconnect accessories one at a time to identify the cause.
7. Perform a Normal Power Cycle
If no hazardous condition is present, shut the system down normally, allow shutdown to complete, and restart it using standard controls.
Do not repeatedly cycle a system that exhibits overheating, smoke, liquid intrusion, or electrical abnormalities.
Expected outcome: The interface initializes and responds consistently after restart. If the failure does not recur, continue with repeated functional verification.
8. Test All User-Accessible Controls
Away from patient use, check the user-accessible controls required for normal operation. Confirm each input produces the expected visible or functional response.
Expected outcome: Controls respond predictably and consistently. Any persistent dead, sticking, intermittent, or incorrect control requires escalation.
9. Perform Final Functional Verification
Configure the system with appropriate accessories or an approved test setup. Verify display information, controls, alarm presentation, and fluid-management operation.
Expected outcome: The interface operates normally throughout the functional test. If verification passes, the system may be returned to service according to local policy.
10. Escalate an Unresolved Interface Failure
If power, startup, physical condition, operating state, accessories, and normal restart have been ruled out, stop external troubleshooting.
Expected outcome: A system with unreliable controls is removed from service and routed for qualified repair.
If the Problem Persists
Common external causes have been ruled out. Remaining categories may include the display assembly, control interface, internal communication, software, protected configuration, or internal electronics.
The device should be:
- Removed from service
- Labeled Out of Service
- Sent for repair or bench evaluation
- Evaluated using appropriate Stryker documentation and approved test equipment
- Repaired or configured only by qualified personnel
The system should not return to clinical use until all required controls respond reliably and complete functional verification has passed. Knowing when to stop external troubleshooting is proper troubleshooting.
Clinical Use Tip
An intermittent control is still an unreliable control; do not return the CrossFlow to a procedure solely because the interface responds after one restart.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Staff reported that CrossFlow controls were not responding during room setup."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering found dried cleaning residue around an external control surface that was interfering with normal operation."
Resolution
What action was taken.
Example:
"The control surface was cleaned using the approved method, normal response was restored, and complete functional operation was verified."
Helpful Details to Include (If Known)
- Exact control or display function affected
- Blank versus frozen display
- Intermittent or constant condition
- Startup status
- Physical damage or contamination
- Accessories connected during failure
- Results after normal restart
- Controls tested
- Alarm and display verification
- Final device status
Final Thought
Treat an unreliable interface as a patient-safety concern. Rule out power, external obstruction, operating state, and accessory effects first, then escalate persistent failures rather than assuming a specific internal component.
That is successful troubleshooting.