Defibrillators · LIFEPAK family

Physio-Control LIFEPAK 15: troubleshooting and error codes

The ServiceForge knowledge base holds 166 documented symptoms for the Physio-Control LIFEPAK 15, with 230 ranked causes, 374 diagnostic checks with test points and expected values, and 162 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

No energy discharge from paddles high voltage

QUIK-COMBO or hard paddles fail to deliver electrical energy

Ranked causes

1. Test setup or procedure error (common)
2. Defective therapy cable or paddles (occasional)
3. W11 Therapy Connector Cable failure (occasional)
4. A04 Therapy PCB failure (rare)
5. A22 Biphasic Module PCB failure (rare)
6. A14 Inductive Resistor failure (rare)
7. A15 Energy Storage Capacitor failure (rare)

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

SpO2 saturation reading missing or out of tolerance patient safety

SpO2 module displays XXX and Service LED OFF, indicates sensor/reading issue

Ranked causes

1. Test setup error (common)
2. Defective finger sensor (occasional)
3. Device configuration error (occasional)
4. A16 SpO2 Module failure (rare)
5. W22 SpO2 Connector Cable failure (rare)
6. A06 OEM PCB failure (rare)

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

CO2 fails calibration patient safety

CO2 module cannot complete calibration procedure

Ranked causes

1. Test setup error or empty calibration gas (common)
2. FilterLine disconnected (occasional)
3. Pinched or kinked tubing inside device (occasional)
4. A23 CO2 module failure (rare)

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

Improper key response

Keypad keys do not respond properly to presses

Ranked causes

1. A09 Printer Control Keypad failure (occasional)
2. A10 Main Keypad failure (occasional)
3. A05 Interface PCB failure (rare)
4. A01 System PCB failure (rare)

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

Missing dots in printed X pattern

Printer test pattern X has missing dots in output

Ranked causes

1. Improper printer paper in use (common)
2. Dirty printhead (common)
3. A12 Printer Assembly failure (occasional)
4. A01 System PCB failure (rare)

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

Missing or broken characters in print output

Printed characters are incomplete or missing

Ranked causes

1. Improper printer paper (common)
2. Dirty printhead (common)
3. A12 Printer Assembly failure (occasional)
4. A01 System PCB failure (rare)

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

No pacer output high voltage

Pacing function does not deliver pacing pulses

Ranked causes

1. Test setup error (common)
2. A13 Transfer Relay connection problem at P22 (occasional)
3. A13 Transfer Relay failure (occasional)
4. A04 Therapy PCB failure (rare)

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

No power ON caution

Device will not power on when turned on

Ranked causes

1. Battery not fully charged or improperly maintained (common)
2. Loose or broken battery pin(s) (occasional)
3. W04 System/Interface PCB cable connection issue (occasional)
4. A03 Power PCB failure (rare)

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

ABNORMAL ENERGY DELIVERY message appears high voltage

Device displays abnormal energy delivery alert

Ranked causes

1. A13 Transfer Relay connection problem at P22 (occasional)
2. A13 Transfer Relay failure (occasional)
3. A04 Therapy PCB failure (rare)

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

CHECK PRINTER message appears

Device displays CHECK PRINTER alert message

Ranked causes

1. Paper sensor dirty (common)
2. Printer paper not correctly loaded (common)
3. A12 Printer Assembly failure (occasional)

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

CO2 displays FilterLine Blockage message patient safety

CO2 module indicates FilterLine is blocked

Ranked causes

1. FilterLine blockage (common)
2. Occlusion or kinking of input tubing (occasional)
3. A23 CO2 module failure (rare)

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

CO2 displays XXX with Service LED OFF patient safety

CO2 module shows XXX reading and Service LED is OFF

Ranked causes

1. FilterLine blockage (common)
2. Occlusion or kinking of internal tubing (occasional)
3. A23 CO2 module failure (rare)

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

Failure to transfer energy at Sync mark high voltage

Energy discharge does not occur at sync mark during synchronized cardioversion

Ranked causes

1. Device in sync mode with discharge attempt needed (common)
2. A10 Main Keypad failure (occasional)
3. Defective therapy cables or paddles (occasional)

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

Improper LCD response

LCD display does not respond normally or shows degraded performance

Ranked causes

1. Display test failure indication (common)
2. A11 LCD Assembly failure (occasional)
3. A01 System PCB failure (rare)

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

Inaudible or garbled audio patient safety

Audio output is not heard or is distorted

Ranked causes

1. W17 Speaker Assembly failure (common)
2. A05 Interface PCB failure (occasional)
3. A01 System PCB failure (rare)

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

Invasive pressure P1/P2 channel reading out of tolerance patient safety

Mean Arterial Pressure (MAP) reading does not match simulated pressure input within tolerance window

Ranked causes

1. Pressure transducer requires zeroing or recalibration (common)
2. Invasive pressure connector loose or not properly seated (occasional)
3. Pressure transducer or cable fault (rare)

First check

Set simulator to ZERO output and zero pressure channel

Test point: P1/P2 channel display and MAP reading
Expected: -20 ±3 mmHg

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

No Sync mark displayed high voltage

Synchronous cardioversion sync mark not visible on ECG waveform

Ranked causes

1. Test setup error (common)
2. ECG size adjustment needed (common)
3. A01 System PCB failure (rare)

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

3-Lead ECG leads off detection failure patient safety

Device does not display leads-off message or sound repeating priority 3 tone when individual ECG lead is disconnected during 3-lead test

Ranked causes

1. ECG cable connection loose or missing lead contact (common)
2. Leads-off detection circuit malfunction (occasional)

First check

Verify LL lead off detection at LEAD II

Test point: LL ECG lead connector
Expected: LL LEADS OFF message and repeating priority 3 tone
Tools: 3-lead ECG cable, Impulse 7000DP simulator

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

5-Lead ECG leads off detection failure patient safety

Device does not display leads-off message or sound repeating priority 3 tone when individual ECG lead is disconnected during 5-lead test

Ranked causes

1. ECG cable connection loose or missing lead contact (common)
2. Leads-off detection circuit malfunction (occasional)

First check

Verify LL lead off detection at LEAD II

Test point: LL ECG lead connector
Expected: LL LEADS OFF message and repeating priority 3 tone
Tools: 5-wire ECG cable, Impulse 7000DP simulator

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

Batteries not fully charged or showing low battery warning patient safety

Lithium-ion batteries do not show more than two charge bars or LOW BATTERY message appears after powering on

Ranked causes

1. Batteries not fully charged before use (common)
2. Battery defective or worn out (occasional)

First check

Inspect charge bar display on batteries

Test point: Battery status indicators on installed batteries
Expected: More than two charge bars visible on each battery

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

Battery connector pins damaged or loose high voltage

Battery connector pins are loose, cracked, or broken, preventing reliable power connection

Ranked causes

1. Loose battery connector pins (occasional)
2. Cracked or broken connector pin leaves (occasional)

First check

Visually inspect battery connector pins for tightness

Test point: Battery connector pins at bottom of device
Expected: Pins firmly seated, no movement

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

Battery does not click into position in battery well patient safety

Lithium-ion battery fails to seat properly or make audible/tactile contact in battery compartment

Ranked causes

1. Battery contacts or well damaged or obstructed (occasional)
2. Battery case deformed or defective (rare)

First check

Attempt to insert battery into well and listen/feel for click

Test point: Battery well and battery case contact points
Expected: Audible or tactile click when battery seats fully

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

Battery icons not visible when power adapter connected patient safety

Battery indicators do not appear on display when external AC/DC power adapter is connected to Auxiliary Connector

Ranked causes

1. Power adapter not properly connected or Auxiliary Connector issue (common)
2. Display or power management circuit malfunction (unknown)

First check

Verify power adapter cable is fully inserted into Auxiliary Connector

Test point: Auxiliary Connector at rear of device
Expected: Cable fully seated with no gaps

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

Battery not fully charged or functional

Lithium-ion batteries do not show sufficient charge bars or return LOW BATTERY message when powered on

Ranked causes

1. Battery insufficient charge (common)
2. Battery defective or failed (occasional)

First check

Verify battery charge state

Test point: Battery status indicator on device display
Expected: More than two charge bars showing on both batteries

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

Bluetooth wireless pairing failure

Device fails to pair with computer via Bluetooth, no alert tone, LED not illuminated, or connection message does not appear.

Ranked causes

1. Bluetooth wireless disabled or not configured (common)
2. Passcode mismatch between device and computer (occasional)

First check

Verify CODE-STAT Reviewer application open on computer

Test point: Software setup
Expected: CODE-STAT Reviewer running, DOWNLOAD WIZARD accessible

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

CO2 FilterLine installed but no indication on display

FilterLine connected but device does not show CO2 is connected

Ranked causes

1. CO2 input connector dirty (common)
2. FilterLine defective (occasional)

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

Defibrillator sync function failure or delay out of range patient safety

SYNC LED not illuminating, R-wave markers not appearing, or sync delay exceeds 60 ms

Ranked causes

1. ECG cable connection or signal quality issue (common)
2. R-wave detection circuit malfunction or sync delay circuit degradation (occasional)

First check

Verify SYNC LED illuminates when SYNC button pressed

Test point: SYNC button and LED
Expected: SYNC LED on; R-wave markers visible on ECG
Tools: Defibrillator analyzer, main ECG cable

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

Device shows no power indication after case reassembly

No indication that power is on after case is reassembled and device is turned ON

Ranked causes

1. Batteries are dead or not installed (common)
2. W04 cable connection not made during case reassembly (common)

First check

Verify batteries are installed and charged

Test point: Battery compartment
Expected: Fresh batteries installed

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

Invasive pressure P1 channel calibration and verification patient safety

Verification that P1 invasive pressure channel displays correct MAP values at multiple pressure points with proper zero offset

Ranked causes

1. Pressure transducer calibration drift or offset error (occasional)
2. Patient simulator not configured correctly (occasional)

First check

Connect invasive pressure cable to P1 connector with simulator at ZERO

Test point: P1 connector on parameter bezel
Expected: Connection established and display shows no error

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

Invasive pressure P1 channel does not read correctly patient safety

P1 pressure waveform or MAP display reads outside tolerance when simulated pressures applied, or channel will not zero

Ranked causes

1. P1 transducer calibration drift or sensor failure (common)
2. Invasive pressure cable disconnected or faulty (occasional)

First check

Verify cable connection to P1 connector

Test point: P1 connector on parameter bezel
Expected: Cable firmly seated

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

Keypad buttons not responding or stuck patient safety

Button does not highlight when pressed, or button remains highlighted at test start indicating short circuit

Ranked causes

1. Keypad has internal short circuit (occasional)
2. Button contact failure or defective key switch (occasional)

First check

Verify no buttons highlighted at start of test

Test point: Keypad button display
Expected: No buttons highlighted

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

Loose or rattling hardware caution

Hardware inside device is loose, causing rattling noise when device is moved or inverted

Ranked causes

1. Fasteners not properly tightened (common)
2. Broken or missing fasteners (occasional)

First check

Invert device and listen for rattling

Test point: Entire device assembly
Expected: No rattling or loose hardware sounds

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

NIBP displays XXX with Service LED OFF patient safety

NIBP module displays XXX and Service LED is OFF, indicates measurement failure

Ranked causes

1. NIBP leakage or tubing blockage (common)
2. A21 NIBP module failure (occasional)

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

Therapy cable not connecting to therapy connector properly high voltage

QUIK-COMBO or standard paddles fail to connect securely to therapy connector

Ranked causes

1. Connector misaligned or contacts obstructed (common)
2. Connector contacts damaged or corroded (occasional)

First check

Verify therapy cable is fully seated in therapy connector

Test point: Therapy connector on device and cable connector
Expected: Cable fully inserted with no visible gaps or movement when gently pulled

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

12-lead ECG fails leads-off detection patient safety

Device does not display leads-off message or priority 3 tone does not sound when individual ECG lead is disconnected during acquisition

Ranked causes

1. Lead detection circuit failure or ECG cable fault (occasional)

First check

Connect main ECG cable to Impulse simulator

Test point: ECG cable limb and precordial lead attachments
Expected: All 10 ECG leads connected to simulator

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

12-Lead ECG gain out of range

Printed ECG signal amplitude does not meet specification for one or more leads during 12-lead ECG gain test

Ranked causes

1. ECG signal chain gain mismatch or calibration drift (unknown)

First check

Measure 12-lead ECG gain amplitude for Lead I

Test point: ECG output
Expected: 25 mm to 31 mm peak-to-peak, 25-31
Tools: ECG printer, Impulse 7000DP simulator

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

12-Lead ECG gain test

Verification that ECG signal amplitudes are correct for each lead at 4.0 ECG size setting

Ranked causes

1. ECG gain setting incorrect or amplifier circuit drift (occasional)

First check

Set simulator to 1 mV, 10 Hz sine wave and device ECG SIZE to 4.0

Test point: Device ECG SIZE setting and simulator output
Expected: Configuration complete for amplitude testing

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

12-Lead ECG leads-off detection test

Verification that device detects open or disconnected leads and displays appropriate alert messages with priority 3 tone

Ranked causes

1. ECG lead connection interrupted or cable damaged (common)

First check

Connect 12-lead ECG cable to patient simulator

Test point: Main ECG cable with limb and precordial lead attachments
Expected: All 10 leads connected to simulator

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

12-lead ECG signal amplitude out of range

Printed ECG signal amplitude does not meet specified peak-to-peak values on one or more leads when testing with Impulse 7000DP signal generator

Ranked causes

1. ECG signal gain incorrect or attenuated (common)

First check

Measure ECG Lead I printed signal amplitude

Test point: Printer output, Lead I
Expected: 25 mm to 31 mm peak-to-peak
Tools: Impulse 7000DP, printer, ruler or calipers

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

3-lead ECG gain incorrect

Printed ECG signal amplitude outside acceptable range for Leads I and II

Ranked causes

1. ECG amplifier gain miscalibrated (occasional)

First check

Set simulator to 1-mV, 10-Hz sine wave

Test point: Simulator output
Expected: 1-mV, 10-Hz sine wave

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

3-Lead ECG gain out of range

Printed ECG signal amplitude does not meet specification for Lead I or Lead II during 3-lead ECG gain test

Ranked causes

1. ECG signal chain gain mismatch or calibration drift (unknown)

First check

Measure 3-lead ECG gain amplitude for Lead I

Test point: ECG output
Expected: 25 mm to 31 mm peak-to-peak, 25-31
Tools: ECG printer, Impulse 7000DP simulator

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

3-lead ECG leads off detection not functioning patient safety

Device does not display correct LEADS OFF message or priority 3 tone does not sound when a 3-lead ECG cable lead is disconnected

Ranked causes

1. ECG lead connection loose or not properly seated (common)

First check

Verify LL LEADS OFF detection with 3-lead cable

Test point: ECG LL lead connection
Expected: LL LEADS OFF message displayed and priority 3 tone sounds

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

3-lead ECG leads-off detection not alerting patient safety

Device should display specific LEADS OFF message and priority 3 tone when leads disconnected from patient simulator

Ranked causes

1. Lead not properly connected to patient simulator (common)

First check

Connect 3-lead ECG cable to device and simulator

Test point: 3-lead cable connectors
Expected: Properly seated connections

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

3-lead ECG signal amplitude out of range

Printed ECG signal amplitude does not meet specified peak-to-peak values when testing 3-lead cable with Impulse 7000DP signal generator

Ranked causes

1. ECG signal gain incorrect or signal path degraded (common)

First check

Measure 3-lead ECG Lead I printed signal amplitude

Test point: Printer output, Lead I
Expected: 25 mm to 31 mm peak-to-peak
Tools: Impulse 7000DP, printer, ruler or calipers

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

5-lead ECG gain incorrect

Printed ECG signal amplitude outside acceptable range for Leads I and II

Ranked causes

1. ECG amplifier gain miscalibrated (occasional)

First check

Set patient simulator to 1-mV, 10-Hz sine wave

Test point: Patient simulator output
Expected: 1-mV, 10-Hz sine wave

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

5-Lead ECG gain out of range

Printed ECG signal amplitude does not meet specification for Lead I or Lead II during 5-lead ECG gain test

Ranked causes

1. ECG signal chain gain mismatch or calibration drift (unknown)

First check

Measure 5-lead ECG gain amplitude for Lead I

Test point: ECG output
Expected: 25 mm to 31 mm peak-to-peak, 25-31
Tools: ECG printer, Impulse 7000DP simulator

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

5-lead ECG leads off detection not functioning patient safety

Device does not display correct LEADS OFF message or priority 3 tone does not sound when an ECG lead is disconnected during 5-lead testing

Ranked causes

1. ECG lead connection loose or not properly seated (common)

First check

Verify LL LEADS OFF detection

Test point: ECG LL lead connection
Expected: LL LEADS OFF message displayed and priority 3 tone sounds

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

5-lead ECG leads-off detection not alerting patient safety

Device should display specific LEADS OFF message and priority 3 tone when individual leads disconnected from patient simulator

Ranked causes

1. Lead not properly connected to patient simulator (common)

First check

Remove RL lead and verify alert

Test point: RL lead connection
Expected: RL LEADS OFF message and priority 3 tone

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

5-Lead ECG leads-off detection test

Verification that device detects open or disconnected leads on 5-wire ECG cable and displays appropriate alerts

Ranked causes

1. 5-wire ECG lead connection interrupted or cable damaged (common)

First check

Connect 5-wire ECG cable to patient simulator

Test point: 5-wire ECG cable connections
Expected: All 5 leads connected (RA, LA, RL, LL, V1)

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

5-lead ECG signal amplitude out of range

Printed ECG signal amplitude does not meet specified peak-to-peak values when testing 5-lead cable with Impulse 7000DP signal generator

Ranked causes

1. ECG signal gain incorrect or signal path degraded (common)

First check

Measure 5-lead ECG Lead I printed signal amplitude

Test point: Printer output, Lead I
Expected: 25 mm to 31 mm peak-to-peak
Tools: Impulse 7000DP, printer, ruler or calipers

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

Accessory cables or sensors expired or unsuitable patient safety

ECG, SpO2 sensors, CO2 tubing, NIBP tubing, temperature sensors, or related items are expired, damaged, or unsuitable for use

Ranked causes

1. Expired or damaged accessory items (common)

First check

Verify expiration dates and condition of all accessories

Test point: ECG cables, SpO2 sensors, CO2 tubing, NIBP tubing, temperature sensors
Expected: All items current (not expired), clean, and in good condition

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

Active battery indicator not showing correctly patient safety

Device does not display which battery is in use via white battery number in black box, or priority selection (lowest charge first) is not functioning

Ranked causes

1. Battery charge states not properly detected (occasional)

First check

Active battery indicator display

Test point: Battery status display area
Expected: White battery number in black box indicating active battery

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

Analog ECG output amplitude incorrect

Oscilloscope measurement of analog ECG output outside acceptable voltage range

Ranked causes

1. Analog output stage gain miscalibrated (occasional)

First check

Connect device, simulator, and oscilloscope

Test point: ECG cable and oscilloscope connections
Expected: All connections properly seated

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

Audio output distorted or inaudible patient safety

Voice prompts not clearly audible, reproduced with distortion, or incorrect language

Ranked causes

1. Speaker defective or audio circuit fault (occasional)

First check

Play voice prompts via VOICE/TONE test

Test point: Device speaker output
Expected: Voice prompts clearly audible, no distortion, correct language

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

Audio output unclear or distorted

Voice prompts from speaker are not clearly audible or contain distortion during audio test

Ranked causes

1. Speaker malfunction or degraded audio output (unknown)

First check

Confirm voice prompts are clear and undistorted

Test point: Speaker output
Expected: Voice prompts clearly audible without distortion

Audio test for voice prompts and tones

Verification that device produces clear, undistorted voice prompts and tones from speaker

Ranked causes

1. Speaker not functioning or audio signal distorted (unknown)

First check

Select and start voice/tone test

Test point: Service/Tests submenu VOICE/TONE option
Expected: Voice prompts play from speaker

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

Auxiliary power switching not functioning high voltage

Device does not properly switch between battery and auxiliary power, or battery icons do not indicate power source correctly

Ranked causes

1. Auxiliary power connector circuit failure (rare)

First check

Connect power adapter and verify battery icon display

Test point: Battery status indicators on display
Expected: Battery icons appear but neither is highlighted when adapter connected

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

Battery icons not highlighted when power adapter unplugged patient safety

Battery indicator icons do not show highlight after external power adapter is disconnected from Auxiliary Connector

Ranked causes

1. Power switching circuit malfunction or battery detection failure (unknown)

First check

Unplug power adapter and observe battery icons on display

Test point: LCD display screen after disconnecting Auxiliary Connector cable
Expected: One device battery icon is highlighted

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

Battery power source not correctly displayed or managed

Device does not correctly display battery status indicators, which battery is in use, charge state, or does not properly manage battery switching when batteries are installed or removed

Ranked causes

1. Battery detection or power management circuit issue (occasional)

First check

Turn device ON and verify battery status display

Test point: Battery status indicators on display
Expected: Indicators show presence of both batteries, charge state on each, which battery in use

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

Battery status indicators not displaying correctly

Device fails to show battery presence, usage status, or charge state on display

Ranked causes

1. Battery status display malfunction (unknown)

First check

Power on device and observe battery status display

Test point: Display screen
Expected: Battery status indicators visible showing presence of batteries in Wells 1 and 2, which battery in use (white number in black box), and state of charge on each battery

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

More symptoms

Battery well 1 presence not detected
Battery well 2 presence not detected
Bluetooth wireless connection setup
Calibration: Analog ECG output
Calibration: CO2 Module
Calibration: Defibrillator ECG gain
Calibration: Defibrillator Energy
Calibration: Defibrillator Isolation
Calibration: Defibrillator Output Waveform
Calibration: Direct Applied Part Leakage Test - ECG
Calibration: Direct Applied Part Leakage Test - SpO2
Calibration: Direct Applied Part Leakage Test - Therapy
Calibration: Direct Equipment Leakage Test
Calibration: ECG Restore Test - Standard Paddles
Calibration: Leakage Current - AC Powered Setup
Calibration: Leakage Current - Battery Powered Setup
Calibration: Pacer LEADs-Off Detection
Calibration: Pacer output current
Calibration: Pacer Pulse Width
Calibration: Patient Impedance Sense
Calibration: Performance Inspection Procedures
Calibration: Printer at 25 mm
Calibration: Quik-Combo defibrillator delivered energy
Calibration: QUIK-COMBO ECG characteristics
Calibration: R-Wave Detection - Standard Paddles
Calibration: Standard paddles delivered energy
Calibration: Standard paddles ECG characteristics
Calibration: Standard paddles synchronous cardioversion
Calibration: Standard paddles user test
Calibration: Temperature
Carrying strap or mounts damaged or missing
Configure Safety Analyzer for IEC 62353 testing
Damaged keypad or label
Date/Time Incorrect on Printout
Defibrillation event signal recovery
Defibrillator charge time exceeds specification
Defibrillator delivered energy out of range
Defibrillator delivered energy outside acceptable range
Defibrillator shock marker or energy event not recorded on printout
Defibrillator synchronization delay exceeds limit
Defibrillator synchronous cardioversion not synchronizing
Delivered energy out of tolerance
Device does not complete power-on self-test within specification
Device does not detect positive R-waves on QUIK-COMBO paddles
Device does not use correct battery when two installed
Device preparation for Performance Inspection Procedures
Display screen does not match expected startup appearance
Display screen does not show expected startup screen
ECG amplitude does not restore to adequate level after defibrillation
ECG analog output signal amplitude out of range
ECG baseline does not restore to zero offset after defibrillation
ECG gain on QUIK-COMBO paddles incorrect
ECG signal amplitude outside specification during gain test
ECG signal does not restore to baseline after defibrillation
Excessive leakage current on ECG direct applied parts
Excessive leakage current on SpO₂ applied parts
Excessive leakage current on therapy (defibrillation) applied parts
Exterior physical damage or wear
Front panel LEDs do not flash during self-test
Invasive pressure P2 channel calibration and verification
Invasive pressure P2 channel does not read correctly
Keypad button does not respond
Keypad function test
Keypad or overlay damaged
Leakage current testing setup - AC powered
Leakage current testing setup - battery powered
Loose or broken hardware
MAINTENANCE DUE message appears
Monitor cable or sensor connectors damaged or contaminated
One or more horizontal lines missing or distorted
Pacer output current outside acceptable range
Pacer pulse width out of range
Pacing leads-off detection not triggered on electrode disconnect
Paddle leads off detection failure
Paddles lead-off detection malfunction
Positive R-wave not detected or recorded on ECG
Power LED not illuminated after self-test
Power-on LED does not remain illuminated after self-test
Power-on self-test fails or completes slowly
Printer door open alert displayed
Printer paper not installed or loaded incorrectly
Printer speed test at 12.5 mm/sec
Printer speed test at 12.5 mm/sec fails
Printer speed test at 25 mm/sec fails
Rubber feet damaged or missing
SERVICE indicator is ON after case reassembly
Service LED illuminated after self-test
Service LED recurrence after clearing and restart
Service LED remains illuminated after self-test
Service LED remains ON
Setup: TCP workstation configuration
SpCO reading outside acceptable range
Speaker does not emit clear test tone at power-on
Speaker does not emit test tone
SpMet reading outside acceptable range
SpO2 reading outside acceptable range
SpO2/SpCO/SpMet probe or sensor fault
SpO2/SpCO/SpMet sensor test
Standard Paddles defibrillator delivers energy with paddles in wells
Standard paddles paddle surfaces and wells preparation
Synchronization delay exceeds specification during synchronized shock
Therapy cable or connector damaged
Therapy connector spring button not functional
Transient error after EMI or ESD event
User Test Failure
Verify battery charge state

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

Error codes

Code	Meaning	Trigger	Severity
`1005`	UI_ERROR_DISPLAY_SELF_TEST; self-test failed	Display self-test failure during power-on or diagnostics	error
`1006`	UI_ERROR_ENERGY_FAULT; defib charge out of tolerance	Defib charge deviates beyond 15% tolerance during manual mode	warning
`1007`	UI_ERROR_12LEAD_KEY_SEEN; 12-lead key detected in non-configured unit	Software detected 12-lead key closure but unit not configured for 12-lead	error
`1008`	UI_ERROR_ANALYZE_KEY_SEEN; AED mode key detected in non-AED unit	Software detected AED key closure in unit not configured for AED	error
`100a`	UI_ERROR_NIBP_KEY_SEEN; NIBP key detected in non-NIBP unit	Software detected NIBP key closure in non-NIBP configured unit	error
`100b`	UI_ERROR_CURRENTUP_KEY_SEEN; pacing current-up key in non-pacing unit	Software detected current-up key closure in non-pacing configured unit	error
`100c`	UI_ERROR_CURRENTDOWN_KEY_SEEN; pacing current-down key in non-pacing unit	Software detected current-down key closure in non-pacing configured unit	error
`100d`	UI_ERROR_RATEUP_KEY_SEEN; pacing rate-up key in non-pacing unit	Software detected rate-up key closure in non-pacing configured unit	error
`100e`	UI_ERROR_RATEDOWN_KEY_SEEN; pacing rate-down key in non-pacing unit	Software detected rate-down key closure in non-pacing configured unit	error
`100f`	UI_ERROR_PACER_KEY_SEEN; pacer key in non-pacing unit	Software detected pacer key closure in non-pacing configured unit	error
`1010`	UI_ERROR_PAUSE_KEY_SEEN; pause key in non-pacing unit	Software detected pause key closure in non-pacing configured unit	error
`1037`	UI_ERROR_UNCONFIGURED_BUTTON; button test detected unexpected key	Button self-test detected key not in current hardware configuration	error
`1038`	UI_ERROR_CPR_KEY_SEEN; CPR key in non-AED unit	Software detected CPR key closure in unit not configured for AED	error
`103b`	UI_ERROR_MISSING_LANGUAGE; configured language unavailable	System attempted to load configured language that is not available	error
`1fff`	UI_ERROR_EXTRA_INFORMATION; supplemental error code data	Provides additional context for preceding UI error	info
`3005`	DM_ERROR_DATABASE_ERASE_ADJUST; unable to write new records	Cannot write new database records during cleanup	error
`3006`	DM_ERROR_DATABASE_ERASE_FAILED; erase block failed	Flash erase operation failed on specified block	error
`3007`	DM_ERROR_DATABASE_ERASE_VERIFY; erased block verification failed	Verification of erased flash block returned invalid data	error
`3008`	DM_ERROR_DATABASE_FLASH_ERASE; database erase failed	Flash erase operation failed during database management	error
`3fff`	DM_ERROR_EXTRA_INFORMATION; supplemental DM error data	Provides additional context for preceding data management error	info
`4009`	SM_ERROR_RAM_FAILURE; RAM failure during self-test	16-bit RAM test failure detected during power-on self-test	critical
`400a`	SM_ERROR_BAD_CRC; program flash CRC failure	CRC verification of program flash failed after power-on	critical
`400b`	SM_ERROR_CRC_FAILURE; program contents failed CRC test	Program memory contents do not match computed CRC value	critical
`400c`	SM_ERROR_VOLTAGE_LOW; ADC voltage reading low	Hardware voltage measurement below acceptable range	error
`400d`	SM_ERROR_VOLTAGE_HIGH; ADC voltage reading high	Hardware voltage measurement above acceptable range	error
`4010`	SM_ERROR_SERVICE_LED; service LED failure	Service LED expected to be illuminated but is not	warning
`4011`	SM_ERROR_DEFIB_SERVICE_SYNC; defib sync failed after cold boot	Failed to synchronize defib charge after cold power cycle	error
`4012`	SM_ERROR_FONT_VOICE_CKSUM; invalid checksum in font/voice	Checksum validation of font/voice data failed at cold boot	error
`4013`	SM_ERROR_FONT_VOICE_CRC; invalid CRC in font/voice flash	CRC validation of font/voice data failed at cold boot	error
`5002`	PC_ERROR_WATCHDOG_SHORT_FAILURE; watchdog short test failed	Main watchdog short duration test failed during diagnostics	error
`5003`	PC_ERROR_WATCHDOG_LONG_FAILURE; watchdog long test failed	Main watchdog long duration test failed during diagnostics	error
`5004`	PC_ERROR_WATCHDOG_UNEXPECTED; unexpected watchdog reset occurred	Processor detected unexpected watchdog reset during operation	warning
`5005`	PC_ERROR_RAM_AT_BOOT; RAM error detected during boot	RAM failure detected during power-on self-test sequence	critical
`5006`	PC_ERROR_BAD_CHECKSUM; program checksum verification failed	Program contents do not match stored checksum value	critical
`500d`	PC_ERROR_CONFIG_VERSION; system configuration version mismatch	System configuration version does not match expected version	error
`500e`	PC_ERROR_CONFIG_CRC; NVRAM system configuration CRC bad	Configuration data stored in NVRAM fails CRC validation	error
`5011`	PC_ERROR_METERS_VERSION; system meters version mismatch	System meters/counters version does not match expected version	error
`5012`	PC_ERROR_METERS_CRC; NVRAM meters/counters CRC bad	Meters and counters data stored in NVRAM fails CRC validation	error
`5013`	PC_ERROR_MFG_DATA_VERSION; manufacturing data version mismatch	Manufacturing data version does not match expected version	error
`5014`	PC_ERROR_MFG_DATA_CRC; NVRAM manufacturing data CRC bad	Manufacturing data stored in NVRAM fails CRC validation	error
`5015`	PC_ERROR_FORCED_RESET_FAILED; forced watchdog reset failed	Processor failed to reset after watchdog forced reset attempt	critical
`5019`	PC_ERROR_RTC_BAD; RTC is not running	Real-time clock stopped or not responding during boot	error
`501a`	PC_ERROR_RTC_DRIFT; processor and RTC time out of sync	Processor system clock and RTC clock drift beyond tolerance	warning
`5032`	PC_ERROR_RTC_NO_BATTERY; no coin cell battery for RTC	Coin cell battery for real-time clock is missing or dead	error
`5033`	PC_ERROR_RTC_READ; RTC read is not consistent	RTC returns inconsistent data on successive read attempts	error
`600c`	ECG_ERROR_DSP_VOLTAGE; DSP preamp supply voltage out of range	DSP preamplifier power supply voltage outside acceptable limits	error
`600d`	ECG_ERROR_PREAMP_CALIBRATION; calibration constants out of range	NVRAM calibration constants found to be outside valid range	error
`600e`	ECG_ERROR_NVRAM_FAULT; NVRAM redundant value mismatch	Redundant NVRAM values do not match during verification	error
`900e`	PPSP_ERROR_CONFIG; SpO2 module configuration mismatch	SpO2 module detected but not in manufacturing configuration	error
`902d`	PPSP_ERROR_MNC_CONFIG_B; SpO2 Nellcor configuration mismatch	SpO2 module detected but config not set for Nellcor sensor support	error
`9119`	PPNI_ERROR_CONFIG_MISMATCH; NIBP module configuration mismatch	NIBP module detected but unit not configured for it	error
`9205`	PPCO_ERROR_WRITING_TO_MODULE; CO2 module configuration mismatch	CO2 module detected but not in manufacturing configuration	error
`9304`	PPTI_CONFLICT_IP_TEMPER_ERROR_CONFIG; conflicting module configuration	IP and Temperature module config bits both set simultaneously	error
`a002`	TH_ERROR_DEFIB_LINK_DOWN; lost defib processor communication	Serial communications link between main and defib processor failed	critical
`a003`	TH_ERROR_PACER_LINK_DOWN; lost pacer processor communication	Serial communications link between main and pacer processor failed	critical
`a004`	TH_ERROR_UNEXPECTED_ENERGY; unexpected energy in capacitor	Energy detected in capacitor when none should be present	error
`a005`	TH_ERROR_CAP_OVERCHARGED; over-charged capacitor	Capacitor charge exceeded maximum safe limit during charging	error
`a008`	TH_ERROR_DEFIB_DISABLE; no communication with defib hardware	No response from defib hardware module during initialization	critical
`a00a`	TH_ERROR_DE_WRONG_ENG_SELECT; incorrect energy selected	Energy selection does not match user request or stored configuration	error
`a00b`	TH_ERROR_SHOCK_NOT_DELIVERED; shock delivery failed	Shock was not successfully delivered to patient	critical
`a00d`	TH_ERROR_CHARGING_EXPIRED; charging time exceeded	Capacitor charging operation exceeded maximum time limit	error
`a00f`	TH_ERROR_CAP_OUT_OF_RANGE; capacitor out of calibration range	Capacitor voltage measurement outside acceptable calibration limits	error
`a010`	TH_ERROR_PA_RATE_OUT_OF_RANGE; pacing rate out of tolerance	Pacer rate deviates beyond acceptable limits from selected rate	error
`a011`	TH_ERROR_PA_CURRENT_OUT_OF_RANGE; pacing current out of tolerance	Pacing current deviates beyond acceptable limits from selected current	error
`a017`	TH_ERROR_DEFIB; defibrillation error report	Generic defibrillation system error during therapy operation	error
`a018`	TH_ERROR_PACER; pacing error report	Generic pacing system error during therapy operation	error
`a01a`	TH_ERROR_PACER_FAULT; pacing parameter limit exceeded	Pacing rate, current, or pulse width exceeded safe operating limits	error
`a01b`	TH_ERROR_DEFIB_WDT_DISABLE_FAIL; unable to turn off defib watchdog	Failed to disable defib subsystem watchdog timer during shutdown	error
`a020`	TH_ERROR_PACER_DISABLE; pacer disabled communication lost	Cannot communicate with pacer processor; pacer function disabled	error
`a021`	TH_ERROR_CAP_CHARGE_FAIL; capacitor stays zero while charging	Capacitor voltage remains at zero despite charging operation	error
`a022`	TH_ERROR_CORRUPT_ENERGY_SELECT; energy selection corrupted	Energy selection value in memory does not match expected format	error
`a023`	TH_ERROR_XFER_ENABLE_ON; transfer-enable line high at startup	Defib transfer-enable line not properly disabled during system startup	error
`a024`	TH_ERROR_VCAP2_SATURATED; VCAP2 reading full scale continuously	Capacitor voltage monitoring line 2 reading at maximum value	error
`a026`	TH_ERROR_ENERGY_RESIDUE; residual energy on capacitor	Energy remains on capacitor after discharge or dump operation	error
`a027`	TH_ERROR_PA_RATE_CORRUPT; pacing rate storage corrupted	Stored pacing rate value does not match expected format or range	error
`a028`	TH_ERROR_CAL_ENERGY_FAIL; calibrated voltage out of range	Calibrated voltage value exceeds acceptable limits during calibration	error
`a029`	TH_ERROR_BTE_FAIL; BTE board error condition	Biphasic Therapy Electronics board reported fault or control error	error
`a02b`	TH_ERROR_DEFIB_CONFIG; conflicting defib type configuration	Defib type in hardware does not match software configuration	error
`a02c`	TH_ERROR_DUMP_LINE_FAIL; capacitor dump line failed	Capacitor dump circuit failed during self-test or operation	error
`a02d`	TH_ERROR_WRONG_DEFIB_TYPE; wrong defib type for software	Defibrillator hardware type does not match loaded software version	error
`a02e`	TH_ERROR_ADC_READ; ADC read failure for cap charge	ADC failed to return valid reading when measuring capacitor charge	error
`a101`	DE_ERROR_LONG_WDT; long watchdog test failed	Long watchdog timer test failed or watchdog did not reset in time	error
`a102`	DE_ERROR_SHORT_WDT; short watchdog test failed	Short watchdog timer test failed during diagnostics	error
`a103`	DE_ERROR_SCI_RCV; serial port receiver error	Serial communication receiver detected error during data reception	error
`a104`	DE_ERROR_XFER_KEY; defib hardware error	Transfer key or enable line hardware fault detected	error
`a106`	DE_ERROR_ENERGY_OUT_OF_BOUND; VCAP-1 over/under charge	Capacitor 1 voltage exceeds upper or falls below lower limits	error
`a107`	DE_ERROR_HP_ENG_SELECT; cannot determine rotary energy setting	Energy selection rotary switch position cannot be read	error
`a109`	DE_ERROR_CAL_CRC; calibration table CRC error	CRC verification of calibration table failed	error
`a10b`	DE_ERROR_CHG_TIME; charging takes too long to reach target	Capacitor charging operation exceeded acceptable time limit	error
`a10c`	DE_ERROR_CHG_ENABLE; CHG_EN1 line stuck high	Charge enable control line remains high when it should be low	error
`a10d`	DE_ERROR_DUMP_ENERGY; defib hardware error during dump	Capacitor dump operation failed or reported hardware error	error
`a10e`	DE_ERROR_RCV; defib hardware communication error	Defib hardware failed to respond to receiver command	error
`a111`	DE_ERROR_ENERGY_NOT_ZERO; unexpected energy during biphasic test	Capacitor energy detected during high-pot test when none expected	error
`a112`	DE_ERROR_TEST_XFER_ENABLE; transfer enable control problem	Transfer enable line did not respond during main test	error
`a113`	DE_ERROR_TEST_XFER_ENGAGE; transfer engage feedback error	Defib hardware failed to report transfer engage feedback status	error
`a114`	DE_ERROR_TEST_DUMP_RELAY; biphasic dump relay test failed	Biphasic dump relay failed during self-test procedure	error
`a115`	DE_ERROR_TEST_ADC; ADC hardware test failed	Analog-to-digital converter hardware test failed	error
`a116`	DE_ERROR_TEST_DAC; DAC hardware test failed	Digital-to-analog converter hardware test failed	error
`a117`	DE_ERROR_TEST_HARDWARE; general defib hardware test failure	Generic defibrillator hardware test failed	error
`a118`	DE_ERROR_TEST_RAM; defib RAM test failed	RAM test on defib processor failed	error
`a119`	DE_ERROR_TEST_ROM; defib ROM test failed	ROM test on defib processor failed	error
`a11a`	DE_ERROR_TEST_CPU; defib CPU test failed	Defib processor CPU test failed	error
`a11d`	DE_ERROR_XFER_TIMEOUT; transfer operation timeout error	Defib transfer operation did not complete within time limit	error
`a11e`	DE_ERROR_BUTTONS_UP; defib hardware button error	Defib hardware button test failed	error
`a11f`	DE_ERROR_SYNC_INTERRUPT; defib sync interrupt error	Synchronization interrupt signal from defib hardware invalid	error
`a120`	DE_ERROR_SELF_TEST_INCOMPLETE; defib self-test failed to complete	Defib hardware self-test sequence did not complete successfully	error
`a123`	DE_ERROR_CAL_RCV_CRC; CRC failed for new calibration data	CRC verification failed when receiving new calibration data	error
`a124`	DE_ERROR_CAL_NVM_CRC; calibration write to EEPROM failed	Cannot write energy table to nonvolatile memory due to CRC error	error
`a125`	DE_ERROR_DAC_WRITE; DAC byte write failed via SPI	Failed to write calibration byte to DAC through SPI interface	error
`a126`	Cannot read from ADC	ADC read operation failed	error
`a127`	Must be idle to switch to test mode	Attempt to enter test mode while device not idle	warning
`a129`	Defib hardware error - transfer cable issue	Defib transfer cable failure detected	error
`a12a`	Defib hardware error - transfer paddle issue	Defib transfer paddle failure detected	error
`a12c`	Defib hardware error - charge inhibit failure	Charge inhibit circuit failure detected	error
`a12d`	Charge enable feedback indicates not charging	Charging process initiated but feedback shows no charge occurring	error
`a12e`	Cedar BTE fault line state detected	BTE fault signal asserted	error
`a12f`	Cedar BTE fault line state cleared	BTE fault signal de-asserted	info
`a130`	Defib hardware error - BTE reset	BTE (Biphasic Therapy Engine) reset signal issued	error
`a131`	Biphasic hardware not found	System boot or initialization detects missing Biphasic module	critical
`a132`	Defib hardware error - BTE transfer failure	Data transfer to/from Biphasic module failed	error
`a133`	A/D high bit sticky - Cedar BTE A/D converter fault	A/D converter high bit remains fixed during conversion	error
`a201`	Long watchdog timer test failed	Watchdog timer did not respond correctly during test	error
`a202`	Short watchdog timer test failed	Short watchdog timer did not respond during test	error
`a203`	SCI received overrun, framing or parity error	Serial communication interface detects data corruption	warning
`a204`	2 ms ECG sampling overrun	ECG sampling processor unable to complete within 2 ms cycle	error
`a208`	Received message incomplete	Communication message reception detected as incomplete	error
`a209`	Received message size error or input buffer full	Message size incorrect or input buffer capacity exceeded	error
`a20d`	Pacing pulse process overrun	Pacing pulse generation process exceeds time budget	error
`a20e`	Pacing pulse too long	Pacing pulse width exceeds maximum allowable duration	error
`a20f`	Internal A/D conversion timeout	Internal analog-to-digital converter operation did not complete in time	error
`a210`	External A/D conversion timeout	External analog-to-digital converter operation did not complete in time	error
`a211`	SPI transfer timeout	Serial Peripheral Interface data transfer did not complete in time	error
`a212`	RAM test failed	Memory self-test detected RAM failure	critical
`a213`	ROM CRC test failed	Read-only memory checksum verification failed	critical
`a214`	Stack overrun occurred	CPU stack pointer exceeded allocated stack memory	critical
`a215`	Isolated +5 V reference out of range	Isolated +5 V supply voltage measured outside specification	error
`a216`	High voltage present when not pacing	HV detected on output when pacing not active	critical
`a217`	+12 V voltage out of range	+12 V supply voltage measured outside specification	error
`a218`	High voltage present when not pacing	HV detected on output when pacing not active	critical
`a219`	HVIS voltage out of range	HVIS (High Voltage Isolated Sense) voltage measured outside specification	error
`a21a`	Current calibration failed	Pacer output current calibration procedure unsuccessful	error
`a21b`	Impedance 300 ohm calibration failed	Impedance calibration at 300 ohm load unsuccessful	error
`a21c`	Current calibration table corrupted	CRC check of current calibration data failed	error
`a21d`	Impedance calibration values corrupted	CRC check of impedance calibration data failed	error
`a21e`	Impedance 0 ohm calibration failed	Impedance calibration at 0 ohm load unsuccessful	error
`a21f`	Pacing current present when not pacing	Output current detected when pacing mode inactive	critical
`a220`	No high voltage present when pacing	Expected HV output not detected during pacing	critical
`a221`	External A/D test register reset failed	A/D converter test register did not reset properly during diagnostic	error
`a222`	No high voltage present before current calibration	HV not detected during calibration setup procedure	error
`a223`	No Q4 sense when not pacing (Q4 shorted)	Q4 sense signal missing when pacing inactive	error
`a224`	Q4 sense present when pacing (CR25 open)	Q4 sense signal present when pacing active	error
`b001`	Printhead ADC reading too low; temperature error	Printhead thermistor ADC value below threshold	error
`b002`	Printhead ADC reading too high; temperature error	Printhead thermistor ADC value above threshold	error
`b003`	Printer self-test failed; invalid CRC	Hardware self-test detects incorrect CRC from printer module	error
`b004`	Wrong printer type detected; 50/100 mismatch	Installed printer type does not match device configuration	error
`c008`	Lost communications with power PCB	Serial communication with power management board failed	error
`c009`	Power PCB running on internal oscillator; external clock failure	Power PCB detects external clock failure during initialization	warning
`d003`	SCI frame error	Serial communication interface detects frame synchronization error	warning
`d004`	SCI parity error	Serial communication parity check fails	warning
`d005`	SCI read buffer full	Serial communication input buffer capacity exceeded	warning
`d006`	SCI initialization failed	Serial communication interface did not initialize during startup	error
`d00d`	Message queue full; queue overflow	Internal message queue capacity exceeded	error

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

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