Philips HeartStart MRx

Asset Type

Defibrillator

Manufacturer

Philips

Model

HeartStart MRx

Manual Reference

Philips HeartStart MRx Service Manual, M3535A / M3536A, Publication No. M3535-90900, Edition 4.

Manufacturer Recommendation / AEM Status

The service manual separates routine user maintenance from service-personnel maintenance.

Manufacturer-Listed Routine Maintenance Items

Manufacturer-listed routine maintenance items include operational checks, printer paper replacement, lithium ion battery charging and maintenance, device cleaning, Ready For Use indicator review, and automated test history review when needed.

The service manual states that most routine maintenance is performed by the user and refers detailed user maintenance procedures to the Instructions for Use.

Manufacturer-Listed Service Maintenance Items

NBP module calibration is listed yearly or every 10,000 cycles. EtCO2 module calibration is listed yearly or every 4,000 operating hours. NBP module replacement is recommended after 50,000 measurement cycles. CO2 module replacement is recommended after 15,000 operating hours.

Manufacturer-Listed Automated Test Frequencies

The service manual lists hourly automated tests, daily automated tests between 11:00 PM and 1:00 AM, and weekly automated tests on Sunday between 11:00 PM and 1:00 AM.

Operational Check Frequency

The service manual says operational checks should be performed at regular intervals to supplement automated tests, but the exact scheduled interval is not specified in the provided service manual excerpt. Facility policy or the Instructions for Use should define the scheduled operational check interval.

Post-Repair Safety Inspection Requirement

The service manual repeatedly directs the technician to run Performance Verification and Safety testing after many repairs. Testing level depends on the repair performed.

AEM Status

If a facility performs this PM at a different interval or changes the listed activities, that should be handled under the facility’s approved AEM program, risk assessment, maintenance history, and applicable regulatory requirements.

What This PM Procedure Covers

This procedure covers visual inspection of the Philips HeartStart MRx, Ready For Use indicator review, Automated Test Summary review, Operational Check, battery inspection, printer check, cable and accessory inspection, NBP calibration check when equipped, CO2 calibration check when equipped, electrical safety testing documentation, and PM pass/fail documentation for CMMS use.

Required Tools and Equipment

Use only tools and test equipment appropriate to the configuration being tested.

• Charged MRx battery, at least 20% capacity.
• Pads or paddles therapy cable.
• ECG cable.
• 50 ohm defibrillator test load, as applicable.
• Manometer for NBP testing.
• Expansion chamber, 250 ml ±10%, or NBP cuff wrapped around a solid object.
• 5% CO2 calibration gas, part number 15210-64010.
• 10% CO2 calibration gas, part number 15210-64020.
• Calibration gas flow regulator, part number M2267A.
• Electronic flowmeter, part number M1026-60144.
• CO2 calibration tube, part number 13907A.
• FilterLine set, part number M1920A.
• Reliable local barometric pressure reference.
• Calculator.
• Electrical safety analyzer, if required by facility policy or scheduled PM program.
• Defibrillator analyzer, if facility PM policy includes delivered-energy verification beyond the MRx Operational Check.

Step-by-Step PM Procedure

1. Confirm Device Identity and Configuration

Verify asset ID, serial number, model, installed options, and device location.

Expected outcome: Device identity matches the work order and installed options are known before testing.

Why it matters: NBP, SpO2, CO2, pacing, 12-lead, printer size, and therapy cable configuration affect the PM steps.

2. Remove From Clinical Use

Confirm the HeartStart MRx is not attached to a patient and is not needed for active emergency use.

Expected outcome: Device is safe to inspect and test.

3. Visual Inspection

Inspect the housing, display, therapy knob, buttons, soft keys, printer door, battery compartments, AC/DC power connections, therapy port, ECG port, SpO2 port, NBP port, CO2 inlet/outlet ports, carry case, handle, bedrail hook, and labels.

Inspect accessories normally stored with the unit, including pads or paddles, therapy cable, ECG cable, SpO2 sensor or cable if equipped, NBP cuff and tubing if equipped, CO2 FilterLine supply if equipped, printer paper, batteries, and AC/DC power cord or supply.

Expected outcome: No cracked housing, loose connectors, damaged cables, missing labels, expired consumables, unreadable display, stuck buttons, damaged paddles, missing paper, or battery compartment damage.

4. Check Ready For Use Indicator

Check the Ready For Use indicator before powering the device on.

Expected outcome: A blinking black hourglass indicates a ready condition. A blinking red X indicates low/no battery or battery issue. A solid red X indicates a failure condition or no power condition requiring troubleshooting.

Remove from service if the RFU indicator shows a solid red X, critical failure, failed therapy function, or the device cannot be powered and tested.

5. Review Automated Test Summary

Access and review or print the Automated Test Summary.

Expected outcome: Recent automated tests show acceptable results.

Manufacturer-listed automated tests include hourly checks of batteries, internal power supplies, and internal memory; daily checks of batteries, internal power supplies, internal memory, internal clock battery, defibrillation, pacing, ECG, SpO2, EtCO2, NBP, and printer; and weekly daily testing plus a high-energy internal discharge to exercise the defibrillation circuitry.

Remove from service if critical automated test failures are present and not resolved.

6. Run Operational Check

Run the MRx Operational Check with a charged battery installed. Attach the therapy cable and ECG cable as prompted. Respond to all display and audio prompts.

The Operational Check verifies display test, general system test, audio test, leads ECG test, pads/paddles ECG test, pacer test if equipped, defib test, battery compartment A and B tests, SpO2 test if equipped, NBP test if equipped, CO2 test if equipped, and printer test.

Expected outcome: Operational Check passes.

Important: Run the defib test for each type of therapy cable used with the device, such as pads cable, external paddles, or internal paddles.

Remove from service if Operational Check reports Critical Failure, Non-Critical Failure requiring repair, Battery Failure, failed defib test, failed ECG test, failed pacer test, failed display/audio test, or any unresolved failure affecting readiness.

7. Battery Check

Inspect batteries for damage, swelling, cracked housing, contamination, missing labels, or failed charge indicators. Confirm batteries are charged and recognized by the device. Review Operational Check battery results.

Expected outcome: Battery compartments pass, batteries are charged, and no calibration or replacement issue prevents service use.

Manufacturer-listed note: Battery calibration may be recommended by the device. If prompted, calibrate the battery per the Instructions for Use.

8. Printer Check

Verify printer paper is installed correctly and the printer door latches securely. Confirm printer test passes during Operational Check.

Expected outcome: Printer feeds and prints properly without faint print, missing dots, jamming, wet paper, or door latch issues.

9. NBP Module Check, If Equipped

Check NBP calibration status and cycle count in Service Mode.

Perform NBP testing when due or when readings are questioned. Testing includes an accuracy test at approximately 280 mmHg, leak test at approximately 280 mmHg for 60 seconds, linearity test at approximately 150 mmHg, and calibration if required.

Expected outcomes: NBP calibration interval is yearly or every 10,000 cycles. Accuracy should be within ±2 mmHg of the manometer. Leak test pressure drop should be less than 6 mmHg in 60 seconds. Linearity should be within ±2 mmHg of the manometer. Replacement is recommended after 50,000 cycles.

Important: Do not keep the cuff pressurized for more than 3 minutes.

After NBP calibration, run an Operational Check so calibration status updates.

10. CO2 Module Check, If Equipped

Check CO2 operating hours, calibration status, ambient pressure, leakage, pump performance, flow rate, noise, and calibration accuracy as applicable.

Manufacturer-listed intervals and limits include CO2 calibration yearly or every 4,000 operating hours, CO2 module replacement recommended after 15,000 operating hours, ambient pressure within ±12 mmHg of a reliable local barometric pressure reference, outlet and inlet leakage checks reading 0 to 4 ml/min, pump check cell pressure and ambient pressure difference greater than 120 mmHg, flow rate of 50 ml/min ±7.5 ml/min, noise index not exceeding 3 mmHg, 5% CO2 calibration check expected value based on gas concentration × ambient pressure with tolerance ±5%, and 10% CO2 calibration check expected value based on gas concentration × ambient pressure with tolerance ±7%.

Expected outcome: CO2 module passes status, leak, pump, flow, noise, and calibration checks.

After CO2 calibration, run an Operational Check so calibration status updates.

Electrical Safety Testing if applicable

The provided service manual references Performance Verification and Safety testing, especially after repairs, but the provided service manual excerpt does not give a universal leakage-current limit for scheduled PM documentation.

Document the facility standard used.

Ground resistance measured in ohms, expected ≤ 0.5 Ω or facility/NFPA 99 criteria if different.

Touch/chassis leakage measured in microamps:
Facility limit used =
Result =
Pass / Fail =

Applied part leakage, if performed by facility policy:
Facility limit used =
Result =
Pass / Fail =

Pass / Fail Criteria

PM Pass Criteria

• Device identification verified.
• Visual inspection acceptable.
• RFU indicator acceptable.
• Automated Test Summary reviewed with no unresolved critical failures.
• Operational Check passes.
• Defib test passes for therapy cable type used with the device.
• Battery check passes.
• Printer check passes.
• NBP check/calibration acceptable if equipped and due.
• CO2 check/calibration acceptable if equipped and due.
• Electrical safety testing passes using facility criteria.
• No unresolved inops, failed self-tests, damaged accessories, expired critical supplies, or unsafe conditions remain.

Remove From Service Criteria

Remove the HeartStart MRx from service if any of the following are found:

• Solid red X RFU indicator.
• Critical Failure.
• Shock Equip Malfunction.
• Pacer Equip Malfunction.
• ECG acquisition failure that cannot be cleared.
• Failed Operational Check.
• Failed defib test.
• Failed display or audio test.
• Battery failure that affects readiness.
• Damaged therapy cable, paddles, pads cable, ECG cable, or connector.
• NBP or CO2 failure that affects the configured clinical use of the device.
• Electrical safety test failure.
• Physical damage that could affect safe use.
• Any condition where the unit cannot reliably deliver therapy or monitor as configured.

Use the manufacturer service manual, facility policy, and approved AEM program to determine the final PM interval and return-to-service requirements.