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What This Guide Helps With
Error: VALVE DEF indicating loss of hydraulic valve control causing table movement failure or unresponsive positioning functions.
Step-by-Step Troubleshooting
Ensure Patient Safety First
- Immediately remove the table from patient use if movement is uncontrolled or unavailable
- Transfer the patient to a safe, stable surface if needed
Verify the Reported Error and Behavior
- Power on the table and confirm “VALVE DEF” is displayed
- Attempt table movements (height, tilt, back section)
- Observe if no movement occurs or controls are unresponsive
Check Power Source and System Status
- Ensure the table is plugged into mains power
- Verify the main power indicator is illuminated
- Check if the issue persists on both battery and AC power
Inspect Hand Control and Foot Pedal
- Disconnect and reconnect the hand control
- Inspect cable for damage or pinching
- Test with a known working hand control if available
- Ensure no buttons are stuck or continuously pressed
Check External Connections and Cables
- Inspect all visible harnesses and connectors at the base of the table
- Look for loose, disconnected, or damaged wiring
- Reseat accessible connectors if safe to do so
Observe for Hydraulic System Response
- Listen for pump activation when a movement command is given
- Check for any partial movement or sound from valves
Attempt System Reset
- Power the table off completely
- Disconnect from mains power for 30–60 seconds
- Reconnect and power back on
Stop if Resolved
- If control returns and error clears, verify full table functionality
- Return the device to service only after confirming normal operation
If the Problem Persists
External causes and input devices have been ruled out. Persistent VALVE DEF indicates internal control failure, most commonly the motherboard.
- Remove the table from service
- Label Out of Service
- Send for repair or replace motherboard
Clinical Use Tip
Never attempt to troubleshoot control or movement issues while a patient is on the table. Move the patient to a backup device before troubleshooting.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Table displaying VALVE DEF error with no response to positioning controls."
Cause
What was observed during troubleshooting.
Example:
"Verified power, controls, and external connections. No valve response observed, indicating internal motherboard failure."
Resolution
What action was taken.
Example:
"Removed table from service and sent for motherboard replacement and evaluation."
Helpful Details to Include (If Known)
- Alarm behavior
- Accessories swapped
- Power behavior
- Environmental factors
- Indicator lights
- Final device status
Final Thought
Errors like VALVE DEF directly impact table movement and patient positioning. Proper troubleshooting focuses on ruling out external causes quickly and escalating when internal control failure is confirmed.
That is successful troubleshooting.