Pacemakers

Medtronic 5348: troubleshooting and error codes

The ServiceForge knowledge base holds 181 documented symptoms for the Medtronic 5348, with 242 ranked causes, 179 diagnostic checks with test points and expected values, and 1 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Unit produces no pacing output patient safety

Device fails to deliver pacing stimulus to patient

Ranked causes

1. Random component failure (rare)
2. Battery depletion (occasional)
3. Device mishandling (occasional)
4. Improper lead or cable connection (common)
5. Lead displacement (occasional)
6. Lead or cable fracture (occasional)

First check

Attempt to correct loss of control by turning device off then on

Test point: Power switch
Expected: Device powers off and back on

1 more check with pass and fail actions are in ServiceForge. Connect ServiceForge to your AI

No output patient safety

Pacemaker fails to deliver pacing stimulus to patient

Ranked causes

1. Random component failure (occasional)
2. Battery depletion (common)
3. Mishandling (occasional)
4. Improper connection or displacement of leads or cables (occasional)

First check

Turn device off then on

Test point: power control
Expected: device powers on

1 more check with pass and fail actions are in ServiceForge. Connect ServiceForge to your AI

No output from pacemaker patient safety

Pacemaker fails to deliver pacing stimulus to the heart

Ranked causes

1. Random component failure (occasional)
2. Battery depletion (common)
3. Improper lead or cable connection (occasional)
4. Lead or cable fracture (occasional)

5 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Rapid Atrial Pacing (RAP) not functioning correctly patient safety

RAP controls unresponsive, rate not displayed, or device does not deliver RAP burst when HOLD TO DELIVER key is pressed

Ranked causes

1. Lead not in contact with atrium (common)
2. RAP Standby not enabled (common)
3. RAP Standby timeout occurred (occasional)
4. Device operating in base level pacing mode (occasional)

First check

Verify lead placement in atrium

Test point: Atrial lead position
Expected: Lead in contact with atrium only, not ventricle

2 more checks with pass and fail actions, 4 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Unit produces no output patient safety

Pacemaker fails to deliver pacing stimulus to patient

Ranked causes

1. Random component failure (occasional)
2. Battery depletion (common)
3. Device malfunction from mishandling (occasional)
4. Improper connection or displacement of leads or cables (occasional)

First check

Power cycle device

Test point: Device power switch
Expected: Device turns off then on

Device senses no cardiac activity patient safety

Pacemaker fails to detect patient's intrinsic cardiac rhythm

Ranked causes

1. Random component failure (rare)
2. Improper lead connection or displacement (common)
3. Lead fracture (occasional)

Erratic or no pacing output patient safety

Device fails to deliver consistent pacing pulses or no output occurs

Ranked causes

1. Battery with incorrect physical dimensions (common)
2. Battery contacts contaminated (common)
3. Battery drawer not fully latched (occasional)

First check

Verify battery model and physical dimensions

Test point: Battery compartment
Expected: Battery dimensions match device specifications

2 more checks with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Lead fracture or disconnection patient safety

Pacing lead is broken or disconnected from device or patient

Ranked causes

1. Lead fracture (occasional)
2. Lead displacement (occasional)
3. Improper connection of lead (occasional)

No output patient safety

Pacemaker fails to deliver pacing stimulus to the patient.

Ranked causes

1. Random component failure (occasional)
2. Battery depletion (common)
3. Lead or cable disconnection or fracture (occasional)

First check

Verify battery presence and condition

Test point: Battery compartment
Expected: Battery installed

1 more check with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Pacemaker interference from electromagnetic sources patient safety

Operation of medical telemetry, communication transmitters, or MRI equipment near pacemaker may cause interference

Ranked causes

1. Medical telemetry equipment within one meter of pacemaker (occasional)
2. Cellular phones or walkie talkies operated near pacemaker (occasional)
3. MRI equipment operation with active pacemaker (rare)

Rapid Atrial Pacing (RAP) burst delivery patient safety

Operator presses HOLD TO DELIVER key to initiate rapid atrial pacing output; device waits up to two base pacing cycles then delivers asynchronous pulses at selected rate while key is held

Ranked causes

1. RAP Standby not enabled (common)
2. Lead not in contact with atrium (common)
3. RAP Standby timeout (occasional)

First check

Verify RAP Standby is active

Test point: Display screen
Expected: Nominal RAP rate of 320 min-1 (ppm) displayed

3 more checks with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Battery depleted during operation patient safety

Pacemaker ceases functioning or exhibits reduced output due to low battery capacity; low battery indicator appears or device stops after insufficient duration of use

Ranked causes

1. Battery not replaced at start of patient use or after low indicator appears (occasional)
2. Alkaline battery used beyond seven-day continuous use limit (common)

First check

Check battery status

Test point: Pacemaker battery indicator or status display
Expected: Battery indicator shows adequate charge; no low battery warning

2 more checks with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Battery replacement needed patient safety

Low battery indicator appears during device operation; battery status check indicates depletion

Ranked causes

1. Battery depleted during continuous use (common)
2. Wrong battery type installed (occasional)

First check

Verify battery status indicator

Test point: Device display or indicator light
Expected: Low battery indicator present or battery status depleted

2 more checks with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Connection or cable failure caution

Loose, disconnected, or damaged cables and connectors prevent proper device operation

Ranked causes

1. Loose or disconnected connector (common)
2. Cable damage or degradation (occasional)

First check

Visually inspect all connectors and cables

Test point: All device connections
Expected: All connectors fully seated; no loose or corroded pins; cable sheathing intact

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Crystal rate deviation detected patient safety

PACE and SENSE indicators illuminate for less than one second; system self-test performed; device may turn off if rate remains incorrect

Ranked causes

1. Crystal rate deviation from appropriate value (rare)
2. Crystal rate remains incorrect after restart (rare)

First check

Observe PACE and SENSE indicators during rate-runaway protection self-test

Test point: PACE and SENSE LED indicators
Expected: Indicators illuminate for less than one second

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Device does not pace or paces erratically patient safety

No pacing output or irregular pacing after battery installation

Ranked causes

1. Battery has different physical dimensions (occasional)
2. Battery contacts contaminated (occasional)

First check

Verify battery type and physical dimensions match device specification

Test point: Battery drawer
Expected: Recommended battery installed with correct dimensions

1 more check with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Device fails self-test and remains powered on patient safety

LEDs remain illuminated after self-test failure; device does not turn off automatically

Ranked causes

1. OFF key self-test failure (unknown)
2. Self-test failure for unspecified reason (unknown)

First check

Verify OFF key operation and self-test completion

Test point: OFF key
Expected: Device powers off immediately upon failed self-test

4 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Device inhibits or reverts to asynchronous pacing during electromagnetic interference patient safety

Pacemaker in demand mode may stop pacing (inhibit completely) or switch to fixed-rate asynchronous operation at the RATE dial setting when exposed to strong external electromagnetic fields

Ranked causes

1. Electrosurgical equipment in vicinity (common)
2. Diathermy equipment in vicinity (common)

First check

Verify device mode setting

Test point: RATE dial / mode selector
Expected: Asynchronous mode when strong EMI present

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Device inhibits or reverts to asynchronous pacing during EMI exposure patient safety

Pacemaker responds to external electromagnetic interference by inhibiting completely or reverting to fixed-rate asynchronous operation at the RATE dial setting

Ranked causes

1. Electromagnetic interference (EMI) from electrosurgical equipment (common)
2. Diathermy equipment in vicinity of patient (common)

First check

Verify pacemaker mode setting

Test point: MODE selector or display
Expected: Set to asynchronous mode if EMI present

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Device malfunction after opening caution

Fluid sealing compromised or ESD barrier degraded after improper opening/resealing

Ranked causes

1. Seam opened and improperly resealed (rare)
2. ESD barrier label broken (rare)

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

EMI from communication transmitters or medical equipment patient safety

Interference from cellular phones, walkie-talkies, emergency vehicle transmitters, or MRI equipment when operated within one meter of pacemaker

Ranked causes

1. Communication or telemetry transmitter operated within one meter of pacemaker (occasional)
2. MRI equipment operation near pacemaker (rare)

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Exposed pins contacting conductive or wet surfaces patient safety

Risk of electrical shorting or contamination when exposed connector pins contact blood, body fluids, or conductive materials

Ranked causes

1. Unprotected exposed connector pins (common)
2. Blood or body fluid contamination during connection (occasional)

First check

Inspect exposed connector pins

Test point: Connector pins and wires
Expected: Dry, clean, covered or protected from contact

1 more check with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Fluid contamination of device caution

Liquid ingress into device causing malfunction or corrosion of internal components

Ranked causes

1. Device exposed to liquid without protection (occasional)
2. Blood or body fluid contamination of receptacles (occasional)

First check

Inspect for visible fluid or contamination

Test point: All external surfaces, receptacles and seams
Expected: Dry, clean, no visible fluid or residue

3 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Incorrect lead polarity configuration patient safety

Pacing threshold values affected by improper polarity connection; reduced pacing efficacy

Ranked causes

1. Bipolar lead pins inserted in wrong receptacles (occasional)
2. Unipolar system connected incorrectly (occasional)

First check

Identify lead system type

Test point: Lead connector
Expected: System clearly identified as bipolar or unipolar

2 more checks with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Increased or decreased pacing rate patient safety

Pacemaker rate is higher or lower than programmed setting

Ranked causes

1. Random component failure (occasional)
2. Loss of control of rate (unknown)

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Increased or decreased rate patient safety

Pacing rate does not match programmed value.

Ranked causes

1. Random component failure (occasional)
2. Loss of control due to component malfunction (occasional)

First check

Measure pacing rate using ECG or pulse

Test point: Patient cardiac rhythm
Expected: Rate matches programmed value

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Lead system configuration mismatch patient safety

Polarity markings on pacing leads, cables or pacemaker terminals are not matched; operator may observe no pacing or reverse polarity effects

Ranked causes

1. Pacing electrode not connected to negative terminal or indifferent lead to positive terminal (occasional)
2. Polarity markings on components do not align (occasional)

First check

Verify pacing electrode terminal connection

Test point: Pacemaker negative (-) terminal
Expected: Pacing electrode connected to this terminal

2 more checks with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Loss of control of device parameters patient safety

Technician cannot adjust rate, output, sensitivity or power settings

Ranked causes

1. Random component failure (occasional)
2. Device firmware or logic failure (rare)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Low battery indicator during operation caution

Battery voltage drops below safe operating threshold, indicated by low battery indicator light or display.

Ranked causes

1. Battery depleted after extended use (common)
2. New patient not provided with fresh battery at start (occasional)

First check

Check battery status

Test point: Low battery indicator and battery voltage
Expected: No low battery indicator; battery status normal

1 more check with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

No sensing patient safety

Pacemaker fails to detect intrinsic cardiac activity.

Ranked causes

1. Random component failure (occasional)
2. Lead displacement or fracture (occasional)

First check

Check lead attachment and position

Test point: Pacing lead contact
Expected: Secure contact with cardiac tissue

1 more check with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

No sensing patient safety

Pacemaker fails to detect intrinsic cardiac activity

Ranked causes

1. Random component failure (occasional)
2. Improper connection or displacement of leads or cables (occasional)

Operational error after improper sterilization caution

Device damage from gamma irradiation or autoclave sterilization causing malfunction

Ranked causes

1. Device sterilized by gamma irradiation (rare)
2. Device steam-sterilized (autoclave) (rare)

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Pacemaker inhibits or reverts to asynchronous mode patient safety

Device stops pacing on demand or switches to fixed-rate pacing; occurs in presence of strong electromagnetic interference (EMI)

Ranked causes

1. Electromagnetic interference (EMI) from electrosurgical equipment (common)
2. Electromagnetic interference (EMI) from other sources (occasional)

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Pacemaker visual inspection reveals damage patient safety

Device shows signs of mechanical damage, corrosion, or contamination during visual inspection

Ranked causes

1. Battery corrosion or contamination (occasional)
2. Mechanical device damage from impact or mishandling (rare)

First check

Visual inspection of device housing

Test point: Device exterior surface
Expected: No visible cracks, dents, or mechanical damage

2 more checks with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Pacing lead connector not seating in patient cable patient safety

Pacing lead connector pins do not insert fully into patient cable receptacles during connection procedure.

Ranked causes

1. Connector knobs not loosened sufficiently (common)
2. Pacing lead connector damaged or worn (occasional)

First check

Visually inspect pacing lead connectors

Test point: Lead connector pins and patient cable receptacles
Expected: No visible wear or damage

1 more check with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Pacing lead displacement or fracture patient safety

Loss of electrical connection between pacemaker and heart due to lead problems.

Ranked causes

1. Improper initial connection of lead (occasional)
2. Mechanical displacement of lead (occasional)

First check

Verify lead attachment at pacemaker connector

Test point: Connector junction
Expected: Lead is securely attached

1 more check with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Pacing rate abnormal patient safety

Pacemaker paces at increased or decreased rate compared to setting

Ranked causes

1. Random component failure (occasional)
2. Loss of control of rate setting (rare)

Patient cable connector not seating properly patient safety

Patient cable connector plug does not click fully into Model 5348 receptacle, indicating poor connection to pacemaker.

Ranked causes

1. Connector not fully inserted (common)
2. Patient cable damaged or worn (occasional)

First check

Visually inspect patient cable connector and receptacle

Test point: Model 5433A or 5433V patient cable connector
Expected: No visible wear or damage

1 more check with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

RAP burst not delivered patient safety

HOLD TO DELIVER key pressed but device does not deliver output pulses at selected RAP rate

Ranked causes

1. RAP Standby not active or timed out (common)
2. Lead not in atrial contact (common)

First check

Confirm RAP Standby active

Test point: RAP display and controls
Expected: RAP rate displayed, all RAP keys functional

2 more checks with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Rapid Atrial Pacing (RAP) procedure execution patient safety

Enable RAP Standby mode, adjust pacing rate, deliver RAP bursts, and return to basic pacing

Ranked causes

1. RAP Standby mode enabled and configured (common)
2. Return to basic pacing operation (common)

First check

Verify lead contact location

Test point: Atrial lead position
Expected: Lead in contact with atrium, not ventricle

3 more checks with pass and fail actions, 5 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Unintended sensing of far field signals patient safety

Pacemaker senses inappropriate cardiac signals on wrong chamber (R/T waves on atrial lead or P waves on ventricular lead)

Ranked causes

1. Sensitivity setting too low on wrong lead (occasional)
2. Bipolar lead configuration not used (occasional)

First check

Verify sensitivity setting relative to threshold

Test point: Sensitivity dial
Expected: At least one-half the mV value of sensitivity threshold

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Unit performs no sensing patient safety

Pacemaker fails to detect intrinsic cardiac activity

Ranked causes

1. Random component failure (occasional)
2. Improper connection or displacement of leads or cables (occasional)

Visual damage or contamination detected caution

Physical damage to device body, corroded battery connections, or contamination in battery compartment

Ranked causes

1. Mechanical damage from handling or accident (occasional)
2. Battery corrosion or contamination (occasional)

First check

Inspect device for mechanical damage

Test point: Device exterior surfaces
Expected: No cracks, dents, or physical deformation visible

2 more checks with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Abrupt cessation of pacing stimuli patient safety

Pacing stops suddenly, potentially causing asystole before intrinsic rhythm restarts

Ranked causes

1. Immediate termination of pacing without gradual reduction (occasional)

First check

Confirm demand mode available

Test point: Device mode selector
Expected: Demand mode selected before termination

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Adjust RAP Rate patient safety

Modify rapid atrial pacing rate during RAP Standby using increase/decrease keys

Ranked causes

1. RAP rate adjustment needed (unknown)

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

All indicator lights remain on after self-test failure patient safety

Device fails self-test, all indicator lights stay on, no pacing or sensing occurs

Ranked causes

1. Self-test failure - cause unspecified (unknown)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Asystole after pacing termination patient safety

Abrupt cessation of pacing stimuli may cause periods without cardiac output before intrinsic rhythm resumes

Ranked causes

1. Sudden cessation of pacing without gradual reduction (common)

First check

Verify demand mode operation during pacing rate reduction

Test point: Pacemaker mode selector
Expected: Demand mode selected

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Asystole after pacing termination patient safety

Abrupt cessation of pacing stimulus results in periods of asystole before intrinsic rhythm is established

Ranked causes

1. Abrupt termination of pacing stimulus (common)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Asystole after stopping pacing patient safety

Abrupt cessation of pacing stimuli causes periods without heartbeat before patient's own rhythm resumes.

Ranked causes

1. Abrupt termination of pacing without gradual rate reduction (common)

First check

Confirm gradual rate reduction protocol is followed

Test point: Pacing rate dial
Expected: Rate decreases incrementally using demand mode before full termination

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Battery depleted before 7 days during continuous use patient safety

Alkaline battery requires replacement before the recommended 7-day interval during continuous pacemaker operation.

Ranked causes

1. Incorrect or non-recommended battery type installed (occasional)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Battery depleted during continuous use patient safety

Alkaline battery reaches end of life before expected replacement interval

Ranked causes

1. Alkaline battery life exhausted after seven days continuous use (common)

First check

Monitor battery age during continuous use

Test point: Operating time since last battery installation
Expected: Less than seven days continuous use

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Battery drawer not latching properly patient safety

Battery drawer fails to latch securely; device may not indicate a problem despite improper closure

Ranked causes

1. Battery drawer release buttons not pressed simultaneously or fully (common)

First check

Verify battery drawer closure

Test point: Battery drawer
Expected: Drawer in closed position and neither release button pressed into device

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Determine pacing mode patient safety

Setting the device to demand (synchronous) or asynchronous pacing mode based on lead placement and sensitivity adjustment.

Ranked causes

1. Mode selection via lead placement and sensitivity setting (unknown)

First check

Measure patient's sensitivity threshold

Test point: Intrinsic cardiac signal
Expected: Patient sensitivity threshold in mV

2 more checks with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Rapid Atrial Pacing rate adjustment patient safety

Procedure to set desired RAP rate within Standby mode

Ranked causes

1. Rate adjustment required (common)

First check

Increase RAP rate

Test point: RAP rate display
Expected: Rate increases with ∧ key held

1 more check with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Select asynchronous pacing mode patient safety

Configure pacemaker for asynchronous pacing by adjusting sensitivity dial

Ranked causes

1. Mode selection via sensitivity dial to ASYNC position (common)

First check

Turn SENSITIVITY dial fully counterclockwise

Test point: SENSITIVITY dial
Expected: ASYNC position

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Select demand pacing mode patient safety

Configure pacemaker for demand (synchronous) pacing by setting sensitivity threshold

Ranked causes

1. Mode selection via sensitivity dial adjustment (common)

First check

Determine patient sensitivity threshold

Test point: SENSITIVITY dial
Expected: Value between 0.5 and 20 mV

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Current leakage to myocardium from improperly grounded line-powered equipment high voltage

Alternating current leakage through implanted lead pathway to heart muscle may cause fibrillation

Ranked causes

1. Line-powered equipment not properly grounded near patient (occasional)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Defibrillation paddle placement risk high voltage

Paddles placed near pacemaker or lead system during defibrillation

Ranked causes

1. Paddle proximity to pacemaker or leads (common)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Defibrillation/cardioversion risk to pacemaker patient safety

Patient requires defibrillation or cardioversion while temporary pacemaker is active; risk of myocardial damage from current flow across lead system electrodes

Ranked causes

1. Pacemaker and lead system left connected during defibrillation/cardioversion (common)

First check

Verify pacemaker is disconnected from lead system

Test point: Patient cable connector
Expected: Pacemaker physically disconnected from lead system

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Deliver RAP Burst patient safety

Initiate rapid atrial pacing burst by pressing and holding delivery key; device waits up to two base level pacing cycles then delivers asynchronous pulses at selected rate

Ranked causes

1. RAP burst delivery needed (unknown)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

More symptoms

Device damaged by improper sterilization
Device does not power on
Device does not turn on
Device fails self-test
Device fails self-test
Device fails self-test and does not turn off
Device fails self-test but remains on
Device fails to operate
Device has mechanical damage
Device inhibits or reverts to asynchronous pacing during EMI exposure
Device malfunction due to battery depletion
Device not operating due to missing battery
Device physically damaged
Device reverts to asynchronous pacing
Device reverts to asynchronous pacing
Device self-test on startup
Device shuts off unexpectedly
Device turns off unexpectedly
Electromagnetic interference susceptibility
Electrostatic discharge damage
Electrostatic discharge damage
Electrostatic discharge during lead handling
Electrostatic discharge exposure to lead system
Enable RAP Standby State
Equipment may inhibit or revert to asynchronous pacing during EMI exposure
Erratic operation due to high humidity exposure
Erratic operation due to temperature instability
Erratic or no pacing during operation
False indicator light signals
False indicator light signals
Fluid contamination of device
Front panel controls not responding
High humidity degrades device operation
High-rate atrial pacing causes rapid ventricular conduction
High-rate atrial pacing causes rapid ventricular conduction
High-rate atrial pacing may cause rapid ventricular conduction
High-rate burst pacing risk
High-rate conduction risk during RAP
Inappropriate pacing inhibition
Inappropriate pacing inhibition due to sensitivity setting
Inappropriate sensing of far field signals
Inappropriate sensing of far field signals
Increased electromagnetic interference susceptibility
Increased or decreased output amplitude
Increased or decreased output amplitude or pulse width
Increased or decreased output pulse width
Increased or decreased rate
Increased or decreased rate, output pulse width, or output amplitude
Loose pacing lead connection
Loss of control of output
Loss of control of power
Loss of control of rate
Loss of control of rate, output, sensitivity or power
Loss of control of rate, output, sensitivity or power
Loss of control of sensitivity
Loss of device power
Loss of pacing due to abrupt termination
LOW BATT indicator continuous illumination
LOW BATT indicator flashing
LOW BATT indicator flashing on startup
LOW BATT. indicator continuous illumination
LOW BATT. indicator flashing
Low battery condition during operation
Low battery during operation
Low battery during pacemaker operation
Low battery indicator appears
Low battery indicator appears
Low battery indicator appears during operation
Measurement: sensing threshold
Measurement: stimulation threshold
Myocardial damage during defibrillation
OFF key fails self-test
OFF key self-test failure
Pacemaker damage from defibrillation discharge
Pacemaker fails self-test
Pacemaker functional test fails self-test
Pacemaker inhibition or asynchronous reversion during EMI exposure
Pacemaker pulse width test measurement
Pacemaker rate test measurement
Pacemaker sensitivity to line-powered equipment leakage current
Pacing lead connection instability
Pacing lead connection procedure
Pacing lead connector pins not seating properly
Paddle placement during defibrillation near pacemaker
Patient at risk during defibrillation with pacemaker connected
Patient cable connection sequence error
Patient cable connection unclear or loose
Periods of asystole on pacing termination
Physical damage to device
Potential myocardial damage during defibrillation with implanted leads
Preventive maintenance performed
RAP controls unresponsive after power cycle
RAP Standby auto-disable
RAP Standby feature inactive
RAP Standby state auto-disable timeout
Rate and Sensitivity dial adjustment during RAP delivery
Rate-runaway detected
Reversion to asynchronous pacing
Reversion to asynchronous pacing
Reversion window event detected during low battery
Risk from high-rate burst pacing
Risk of ectopic stimulus delivery during sensing adjustment
Risk of fibrillation from line-powered equipment leakage
Risk of myocardial damage during defibrillation
Risk of ventricular fibrillation during electrosurgery
Safety cable or heartwire receptacle contaminated
Safety markings unclear or missing
Self-test failure with all indicator lights on
Static discharge to patient or device
Static electricity hazard during lead handling
Temperature instability affects operation
Threshold variation in bipolar lead connections
Unable to disconnect patient cable from pacemaker
Unauthorized access to device settings
Unauthorized changes to pacemaker settings
Unintended high-rate ventricular conduction
Unipolar lead system polarity error
Unit does not turn on
Ventricular fibrillation risk during electrosurgery
Ventricular fibrillation risk from electrosurgery
Ventricular fibrillation risk from electrosurgery near implanted lead

121 more symptoms with ranked causes and checks are in ServiceForge. Connect ServiceForge to your AI

Error codes

Code	Meaning	Trigger	Severity
`LOW BATT`	Battery voltage below operational threshold	Battery voltage drops below 7.2 volts	warning

Likely causes and actions for each code are in ServiceForge. Connect ServiceForge to your AI

Community

0 fixes logged by technicians through their AI, with outcomes, for this model.

ServiceForge knowledge base record. Field-unverified unless technicians confirmed it. A teaching summary of the record, not a service manual. Export 2026-10-14.