ZOLL R Series

Asset Type

Defibrillator

Manufacturer

ZOLL

Model

R Series

What This Guide Helps With

This guide helps troubleshoot PACER DISABLED on a ZOLL R Series defibrillator. This condition means pacing therapy is unavailable or disabled, which can prevent the unit from being used for transcutaneous pacing during patient care.

The device may still power on, monitor, or perform other functions, but pacing should not be trusted until the condition is corrected and the unit passes the required operational checks.

Step-by-Step Troubleshooting

Ensure Patient Safety First

• If the ZOLL R Series is connected to a patient or needed for active pacing, remove it from clinical use immediately.
• Transfer the patient to another defibrillator/monitor capable of pacing.
• Do not rely on the affected unit for transcutaneous pacing.
• If monitoring or defibrillation still appears available, confirm the clinical situation does not require pacing before continued use.
• Notify clinical staff that pacing therapy is unavailable on the affected unit.

Verify the Reported Error and Behavior

• Power on the ZOLL R Series and confirm the exact message reads PACER DISABLED.
• Check whether the message appears at startup, when selecting pacer mode, during a self-test, after connecting pads, or intermittently during use.
• Observe whether pacing controls are unavailable, pacing output cannot be adjusted, or the device prevents pacing therapy.
• Look for any additional fault messages, maintenance prompts, or therapy cable warnings.

Check Power Source and Battery Condition

• Connect the R Series to a known-good AC power outlet.
• Confirm the AC power indicator is present.
• Check the battery status and charging behavior.
• Install a known-good battery if available.
• Power cycle the unit after confirming stable power.

Check Therapy Cable and Electrode Connection

• Inspect the multifunction therapy cable for cuts, loose connections, bent pins, contamination, or strain relief damage.
• Disconnect and reconnect the therapy cable securely.
• Inspect the therapy connector on the device for visible damage or debris.
• Use a known-good therapy cable if available.
• Connect compatible multifunction electrodes or an approved test load according to facility procedure.

Confirm This Is Not a Pad or Patient Connection Message

• Check whether the unit is also displaying pads off, poor pad contact, check pads, or therapy cable messages.
• Replace the pads with known-good compatible electrodes.
• Confirm the pads are not expired, dried out, damaged, or the wrong type for the unit.
• If PACER DISABLED remains after known-good pads and cable are used, treat the condition as more than a simple connection issue.

Verify Device Configuration and Operating Mode

• Confirm the unit is configured with pacing capability.
• Check whether pacing mode can be selected normally.
• Confirm the device is not locked out by configuration, service state, or restricted operating mode.
• Review recent configuration changes, software updates, service activity, or failed readiness checks.

Run the Appropriate Readiness or Operational Check

• Perform the facility-approved operational check for the ZOLL R Series.
• Observe whether pacing output test steps pass or fail.
• Check for additional displayed faults or maintenance messages during testing.
• Record the exact messages, test results, and whether pacer controls function normally.

Isolate Accessory vs Device Failure

• Test with a known-good therapy cable.
• Test with known-good compatible pads or an approved test load.
• Use a known-good battery.
• Use a known-good AC outlet.
• Repeat startup and pacing selection checks.
• If the message clears, the problem was likely external accessory or power related.
• If PACER DISABLED remains, the failure is likely internal to the defibrillator or related to configuration/service status.

Do Not Return to Service With PACER DISABLED Active

• Do not clear the device for clinical use if PACER DISABLED remains after external checks.
• Remove the unit from service.
• Label the unit Out of Service.
• Notify the clinical area that pacing is unavailable.
• Send the unit for bench evaluation, vendor service, or repair according to facility procedure.

If the Problem Persists

If PACER DISABLED remains after checking power, battery, therapy cable, pads, configuration, and basic operational testing, external and common causes have been ruled out.

A persistent PACER DISABLED message may indicate an internal pacing subsystem issue, therapy circuit problem, configuration problem, or service-required condition.

Remove the device from service, label it Out of Service, and send it for repair, vendor evaluation, or bench-level service. Do not keep resetting the unit or returning it to the floor with pacing disabled.

Clinical Use Tip

Never troubleshoot a pacing-disabled defibrillator on an active patient. Move the patient to a backup device first, then troubleshoot the affected unit only after patient care has been safely transferred.

Work Order Documentation (CCR Method)

CCR = Complaint, Cause, Resolution

Complaint

What was reported by the clinical staff.

Example:
"ZOLL R Series displays PACER DISABLED. Staff reported pacer function unavailable when attempting to use or verify pacing mode."

Cause

What was observed during troubleshooting.

Example:
"Confirmed PACER DISABLED message. Power source, battery, therapy cable, pads, and basic external connection issues were checked. Error remained, indicating likely internal pacing-related failure or service-required condition."

Resolution

What action was taken.

Example:
"Removed defibrillator from service and labeled Out of Service. Sent for bench evaluation/vendor repair. Staff notified to use alternate defibrillator with verified pacing capability."

Helpful Details to Include (If Known)

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

Final Thought

PACER DISABLED should be treated as a clinically significant therapy failure. Start with patient safety, verify the exact message, rule out power, cable, pad, and configuration issues, then escalate appropriately if the error remains. Clear documentation protects patients, staff, and the repair process.

That is successful troubleshooting.