Stryker S3

Asset Type

Hospital Bed

Manufacturer

Stryker

Model

S3

What This Guide Helps With

Troubleshooting Error 103 Input Timer when a continuously active control input affects reliable bed motion operation. This condition may be associated with a stuck or failed pendant, siderail, or footboard motion control, damaged external cabling, contamination, or a connection issue. Until corrected, bed motion controls may be unreliable or unintended movement may occur.

Step-by-Step Troubleshooting

1. Ensure Patient Safety First

• Remove the Stryker S3 bed from patient use if unintended movement occurs, bed motion is unavailable, or controls appear stuck or unreliable.
• If a patient is currently in the bed, coordinate a safe transfer to another appropriate bed before troubleshooting motion controls.
• Do not continue clinical use while a motion-control input may be continuously active.

Expected outcome: The bed can be evaluated without risk of unintended positioning, entrapment, or unavailable patient-care functions.

Why it matters: A continuously active motion input may prevent normal control operation or create unexpected bed movement.

2. Verify the Reported Error and Behavior

• Confirm that the bed displays Error 103 Call Service and document the logged condition as InputTimer.
• Ask staff whether the bed was moving unexpectedly, whether a motion button stopped responding, or whether one control location appeared stuck or unresponsive.
• Determine whether the error occurred during normal operation rather than during an automated cycle.
• Operate the bed only while it is unoccupied and safe to test. Observe whether the error returns and whether any motion command appears continuously active.

Expected outcome: Error 103 is reproduced or clearly documented with an associated motion-control symptom.

Why it matters: Error 103 indicates that a footboard, siderail, or pendant motion input has remained sensed as On for a total of 5 minutes. This check is not performed during Auto-Cycle Mode.

3. Inspect the Pendant Control

• Inspect the pendant, if installed, for any key that remains physically depressed.
• Check for a torn, wrinkled, or damaged button overlay.
• Look for fluid intrusion or contamination around the buttons.
• Inspect the housing for cracks or impact damage.
• Check the pendant cable for pinch damage, stretching, cuts, or strain.
• Inspect the connector for looseness or visible damage.
• Press and release each motion button and confirm that it mechanically returns to neutral.

Expected outcome: All pendant buttons release normally, with no visible damage, contamination, or cable concerns.

Why it matters: A stuck or shorted pendant key can be interpreted by the bed as a continuous motion command.

4. Inspect the Siderail Controls

• Inspect each siderail control panel associated with bed motion.
• Check for depressed or jammed buttons, damaged overlays, contamination, or evidence of cleaning-fluid intrusion.
• Look for cracked or damaged siderail control areas.
• Compare the feel and release of corresponding controls on the opposite siderail.
• With the bed unoccupied, test each siderail motion control individually and verify that motion stops when the button is released.

Expected outcome: Each siderail input activates only while pressed and returns to neutral when released.

Why it matters: A failed siderail control input may continuously signal motion even when no user is pressing a button.

5. Inspect the Footboard Controls

• Inspect the footboard motion-control area for stuck keys, cracked overlays, contamination, fluid damage, or signs of impact.
• Test applicable footboard motion commands individually with the bed unoccupied.
• Confirm that motion occurs only while commanded and stops immediately after button release.
• Observe whether Error 103 immediately returns during testing.

Expected outcome: Footboard controls respond normally and do not remain electronically or mechanically active.

6. Check External Connections and Cable Condition

• Inspect accessible pendant, footboard, and siderail-control cabling and connectors for loose connections.
• Check for bent or damaged connector pins, cable strain, pinch damage, or broken connector locking features.
• Look for fluid contamination, corrosion, or damage caused by bed movement, transport, or cleaning.
• Reseat accessible external connectors only when appropriate and safe for the configuration.

Expected outcome: Control-related cables and accessible connections are secure, clean, and free of visible damage.

Why it matters: Cable or connector damage may create a false continuously active input even when no button is physically stuck.

7. Isolate the Continuously Active Input

• If the error remains and a specific control location is suspected, isolate the suspect external control assembly as appropriate for Clinical Engineering evaluation.
• Potential external sources include the pendant control, footboard control input, or siderail control assembly.
• Retest bed operation only while the bed is unoccupied and safe to evaluate.
• Do not return the bed to clinical service with required controls disconnected or unavailable.

Expected outcome: If Error 103 clears after isolating one external control assembly, that assembly or its associated cable path is the likely source of the continuously active input.

Why it matters: Isolation helps determine whether the condition is accessory-related or requires further bed-control evaluation.

8. Verify Operation After Correction

• After correcting a stuck control, replacing a defective external control assembly, or addressing an identified external connection issue, perform a functional check of all installed bed motion controls.
• Verify that footboard motion controls operate correctly.
• Verify that siderail motion controls operate correctly.
• Verify that pendant motion controls operate correctly, if installed.
• Confirm that each motion command stops immediately when released.
• Confirm that no unintended motion occurs and Error 103 does not return during testing.

Expected outcome: All installed motion controls function normally, return to neutral, and the error remains cleared.

9. Stop When Resolved

• If the cause was an external control, cable, connector, contamination issue, or jammed button and the bed passes functional testing without recurrence of Error 103, document the repair and return the bed to service according to facility procedure.

Resolved condition: The continuously active motion input has been corrected, bed motion is normal, and no Error 103 condition returns.

If the Problem Persists

If Error 103 remains after inspection and isolation of the pendant, siderail controls, footboard controls, and accessible external cabling, external and common causes have been ruled out.

A persistent InputTimer condition may indicate a failed control assembly, wiring path, or bed-control electronics issue requiring additional bench evaluation or repair.

Remove the device from service, label it Out of Service, and send it for repair or further Clinical Engineering bench evaluation.

Knowing when to stop is proper troubleshooting. A bed with an unresolved motion-control error should not be relied upon for patient care.

Clinical Use Tip

Never troubleshoot bed motion controls on an active patient. Move the patient to a backup device first. An unresolved continuous-input error may cause unavailable positioning functions or unintended movement during care.

Work Order Documentation (CCR Method)

CCR = Complaint, Cause, Resolution

Complaint

What was reported by the clinical staff.

Example:
"Stryker S3 hospital bed displayed Error 103 Call Service - InputTimer. Staff reported abnormal bed motion control behavior with a suspected continuously active input."

Cause

What was observed during troubleshooting.

Example:
"Inspection identified a stuck pendant motion button with a damaged overlay, causing the bed to sense the input as continuously On and log Error 103."

Resolution

What action was taken.

Example:
"Removed bed from patient use, replaced the defective pendant, verified footboard, siderail, and pendant motion controls returned to neutral normally, and confirmed Error 103 did not recur during functional testing. Bed returned to service."

Helpful Details to Include (If Known)

• Alarm behavior
• Accessories swapped
• Power behavior
• Environmental factors
• Indicator lights
• Final device status

Final Thought

Error 103 should be treated as a real motion-control reliability concern until proven otherwise. Protect the patient first, confirm the error, evaluate external control inputs logically, isolate the likely source, and escalate when the condition remains unresolved. Clear CCR documentation records both the error meaning and the safe final disposition of the bed.

That is successful troubleshooting.