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What This Guide Helps With
This guide helps troubleshoot the CHECK NURSE CALL RELAY INOP on a Philips IntelliVue MP Series patient monitor. This alarm indicates the monitor is reporting a defective Nurse Call Relay board, which may prevent alarm notification from reaching the facility nurse call system even if local monitor alarms still appear to function.
Step-by-Step Troubleshooting
Ensure Patient Safety First
- Confirm the Philips IntelliVue MP monitor is not being relied on as the only alarm notification path for the patient.
- If the patient requires active monitoring, make sure bedside audible and visual alarms are active.
- Notify clinical staff that the nurse call output may not be reliable until the issue is resolved.
- Expected: Patient monitoring continues safely without relying only on the nurse call relay.
- Why it matters: A nurse call relay issue may prevent alarm notification from reaching the nurse call system.
Verify the Reported Alarm and Behavior
- Confirm the exact INOP message displayed is CHECK NURSE CALL RELAY.
- Observe whether the message appears at startup, during normal monitoring, after connection to the nurse call system, or intermittently.
- Check whether the monitor otherwise powers on, displays parameters, and alarms locally.
- Expected: The INOP is confirmed and local monitor functions are assessed.
- Why it matters: This confirms a true system-reported nurse call relay fault rather than a general monitor failure.
Confirm Local Alarms Still Function
- Use an approved facility test method to verify local alarm behavior.
- Confirm the monitor produces local audible and visual alarm indications.
- Do not create unsafe patient conditions to test the alarm.
- Expected: Local alarm functions operate at the bedside.
- Why it matters: The nurse call relay is an external alarm output path. Local alarm function must be verified separately for patient safety.
Check the Nurse Call Cable Connection
- Inspect the nurse call cable connected to the monitor or interface point.
- Make sure the cable is fully seated and not loose, damaged, kinked, contaminated, or pulled tight.
- Check for visible connector damage or strain at the monitor and wall/interface end.
- Expected: Cable is secure and physically intact.
- Why it matters: A poor external connection can create nurse call communication problems and should be ruled out before board replacement.
Inspect the Nurse Call Wall Jack or Interface Point
- Check the wall jack, adapter, or nurse call interface module used with the monitor.
- Look for bent pins, cracked housings, loose mounting, liquid exposure, or signs of impact damage.
- Confirm the room interface is the correct connection point for that care area.
- Expected: Nurse call connection point is intact and usable.
- Why it matters: The fault may appear monitor-related when the external nurse call connection is damaged.
Swap With a Known-Good Nurse Call Cable if Available
- Replace the nurse call cable with a known-good compatible cable.
- Reconnect the monitor or reboot it if required by local procedure.
- Check whether the CHECK NURSE CALL RELAY INOP clears.
- Expected: If the cable was the issue, the INOP clears or nurse call operation is restored.
- If resolved: Document the defective cable and return the monitor to service after functional verification.
Test the Monitor in a Known-Good Location if Practical
- Move the monitor to a known-good nurse call connection point, or test with a verified nurse call test setup if available.
- Check whether the same INOP follows the monitor.
- Compare results with a known-good monitor if facility procedure allows.
- Expected: The issue either stays with the room/interface or follows the monitor.
- Why it matters: This helps separate a facility nurse call system problem from a monitor hardware problem.
Check Configuration and Intended Use
- Verify the monitor is configured for the expected nurse call use in that care area.
- Confirm staff are not expecting nurse call behavior from a monitor that is not connected, assigned, or configured for that output.
- Review the setup against facility standard configuration before concluding hardware failure.
- Expected: Nurse call setup matches the facility’s intended configuration.
- Why it matters: Configuration mismatch can mimic a nurse call complaint, even when hardware is functional.
Power Cycle and Recheck the INOP
- If patient care allows, remove the monitor from active patient use and power cycle it according to facility procedure.
- Recheck whether CHECK NURSE CALL RELAY returns after startup.
- Expected: Temporary communication or startup glitches may clear.
- If the INOP returns: Treat it as a persistent system-reported fault.
Isolate the Failure
- If the INOP follows the monitor after checking the cable, external connection, room interface, configuration, and power cycle, the likely failure is internal to the nurse call relay output hardware.
- The manual indication points to a defective Nurse Call Relay board.
- Expected: The issue is isolated to the monitor rather than the external nurse call system.
Stop When Resolved
- If replacing the cable, correcting the connection, or fixing configuration clears the INOP and nurse call function tests correctly, return the monitor to service.
- Document the verified correction and final operational status.
If the Problem Persists
If CHECK NURSE CALL RELAY remains present after external checks, cable swap, location/interface check, configuration review, and power cycle, the external causes have been ruled out. Remove the monitor from service, label it Out of Service, and send it for repair or bench evaluation.
A persistent CHECK NURSE CALL RELAY INOP strongly indicates failure of the Nurse Call Relay I/O board. Replacement of the Nurse Call Relay I/O board is the appropriate service action when the fault follows the monitor and does not clear after external troubleshooting.
Clinical Use Tip
Never troubleshoot nurse call relay output on an active patient when that monitor is being relied on for alarm notification. Move the patient to a backup monitor or ensure clinical staff maintain direct bedside monitoring and local alarm awareness first. Maintain therapy and monitoring continuity before testing cables, configuration, room interfaces, or relay output behavior.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Philips IntelliVue MP Series monitor displaying CHECK NURSE CALL RELAY INOP. Nurse call relay output may not be reliable for alarm notification."
Cause
What was observed during troubleshooting.
Example:
"External nurse call cable, wall interface, and configuration checked. INOP followed the monitor. Persistent alarm indicates likely defective Nurse Call Relay I/O board."
Resolution
What action was taken.
Example:
"Removed monitor from service and labeled Out of Service. Sent for repair or bench evaluation for Nurse Call Relay I/O board replacement and post-repair nurse call verification."
Helpful Details to Include (If Known)
- Alarm behavior, including whether CHECK NURSE CALL RELAY appeared at startup, during use, after connection, or intermittently.
- Accessories swapped, including nurse call cable, adapter, wall jack, or interface module.
- Power behavior, including startup result and whether a power cycle cleared or returned the INOP.
- Environmental factors, including room location, wall jack condition, liquid exposure, impact damage, or cable strain.
- Indicator lights, including local audible alarms, visual alarms, nurse call test indication, or room interface response.
- Final device status, including returned to service, Out of Service, sent for bench evaluation, or repaired with Nurse Call Relay I/O board replacement.
Final Thought
Nurse call relay alarms require careful patient safety awareness because the monitor may still appear functional locally while external alarm notification is compromised. Start with simple external checks, verify whether the issue follows the monitor, and escalate when the system-reported INOP persists. Clear CCR documentation protects patient safety and supports the repair process.
That is successful troubleshooting.