Patient monitors · Passport family

Mindray Passport 5-Lead: troubleshooting and error codes

The ServiceForge knowledge base holds 155 documented symptoms for the Mindray Passport 5-Lead, with 227 ranked causes, 298 diagnostic checks with test points and expected values, and 15 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

CHK Lead message displayed

Monitor displays 'CHK Lead' error message

Ranked causes

1. Increased impedance from poor skin preparation (common)
2. Chest hair under electrodes (common)
3. Dried electrode gel (common)
4. Electrode off (common)
5. Lead off (common)
6. Cracked lead wires (occasional)

First check

Inspect skin preparation

Test point: Skin under electrode pads
Expected: Skin clean, abraded, and dry

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

Waveform acquisition failure

Monitor unable to acquire and process waveform data

Ranked causes

1. Front end failure (rare)
2. External supply failure (rare)
3. +12/-23 volt board failure (rare)
4. CPU board failure (rare)
5. CO2 interface board failure (rare)

First check

Check front end board

Test point: Monitor circuit board assembly
Expected: Front end board functioning without error

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

Baseline wander

Baseline shifts up and down, obscuring waveform details

Ranked causes

1. Patient moving excessively (common)
2. Patient respiration (common)
3. Electrodes dry (common)
4. Static buildup around patient (rare)

First check

Secure lead wires and cable

Test point: Lead routing to patient
Expected: Leads secured and not moving with patient

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

CO2 adapter installation or condition problem

CO2: CHECK ADAPTER message displayed, sensor not correctly positioned on adapter or adapter issue detected

Ranked causes

1. Sensor not correctly positioned on adapter (common)
2. Incorrect or different airway adapter type installed (occasional)
3. Dirty or damaged adapter (occasional)
4. Persistent installation or compatibility issue (occasional)

First check

Verify sensor position on airway adapter

Test point: Sensor and adapter interface
Expected: Sensor properly seated on adapter connector

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

CO2 waveform not displaying

Capnostat CO2 sensor connected but waveform does not appear on monitor display

Ranked causes

1. Sensor not warmed up (common)
2. Incorrect Resp Source setting (common)
3. Airway adapter windows blocked or dirty (occasional)
4. Adapter calibration required (occasional)

First check

Verify sensor warm-up status

Test point: Monitor display
Expected: 'Sensor Warming Up' message should disappear before numeric data available

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

Damped invasive waveform caution

Invasive pressure waveform appears flattened or attenuated

Ranked causes

1. Air bubbles in tubing (common)
2. Kinked catheter (common)
3. Catheter against wall of blood vessel (occasional)
4. Blood in tubing (occasional)

First check

Inspect tubing for air bubbles

Test point: Pressure tubing between catheter and transducer
Expected: No air bubbles visible

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

Excessive heart rate and lead fault alarms

Frequent false alarms for heart rate or lead faults

Ranked causes

1. Electrodes dry (common)
2. Alarm limits set too close to patient normal heart rate (common)
3. R-wave wrong size (occasional)
4. Excessive patient movement or muscle tremor (occasional)

First check

Inspect electrode condition

Test point: Electrode pads on patient
Expected: Electrodes moist and properly adhered

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

Interference on ECG

Poor electrode site preparation, improper lead selection, or excessive 50/60 Hz electrical noise on ECG waveform

Ranked causes

1. Poor electrode site preparation (common)
2. Improper lead selection (common)
3. Excessive 50 or 60 Hz electrical noise (common)
4. Wrong ECG cable in use (occasional)

First check

Inspect electrode sites

Test point: Electrode placement areas
Expected: Clean skin with good contact

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

Low amplitude ECG signal

ECG waveform displayed with very small amplitude

Ranked causes

1. Gain set too low (common)
2. Skin improperly prepared (common)
3. Not patient's normal ECG complex (rare)
4. Electrode positioned over bone or muscle mass (occasional)

First check

Verify gain setting

Test point: SIZE key display
Expected: Gain at appropriate level for visible ECG waveform

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

No respiration waveform or rate displayed patient safety

Respiration monitoring not functioning; no respiratory data shown

Ranked causes

1. Patient not connected to patient safety cable (common)
2. Respiration parameter turned off (common)
3. CO2 off and no CO2 module (occasional)
4. Patient connected using ESIS cable (occasional)

First check

Verify patient cable connection

Test point: Patient cable to monitor
Expected: Patient safety cable properly connected

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

AC noise on ECG signal

Excessive AC noise visible on ECG waveform display

Ranked causes

1. Gain set too high (common)
2. Electrodes dry (common)
3. Patient cable entwined with other electrical devices (occasional)

First check

Verify gain setting

Test point: SIZE key display
Expected: Gain at appropriate level for patient signal

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

Artifact on ECG waveform

50 or 60 Hz noise detected on ECG; displayed heart rate may be inaccurate

Ranked causes

1. Poor electrode site preparation (common)
2. Improper lead selection (common)
3. Excessive electrical noise in environment (common)

First check

Assess electrode placement

Test point: Electrode sites and contact
Expected: Good skin contact on all electrodes

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

CO2 occlusion detected in sampling system caution

Sampling pump line or system blockage detected while sidestream pump is on

Ranked causes

1. Sampling line blocked (common)
2. Filter blocked (common)
3. Sampling cell replaced (occasional)

First check

Visually inspect sampling line

Test point: Full length of sampling line
Expected: No visible blockage or kinks

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

Display appears off

Monitor screen is blank or not illuminated

Ranked causes

1. Mains power switch not on (common)
2. Unit not plugged into AC outlet (common)
3. Battery pack drained (occasional)

First check

Check power switch

Test point: Mains power switch on side panel
Expected: Power switch in ON position

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

ECG baseline with no waveform

Baseline displayed but no ECG signal visible

Ranked causes

1. Gain control not set high enough (common)
2. Lead wires and patient cable not fully inserted (common)
3. Cable or lead wires damaged (occasional)

First check

Verify gain setting

Test point: SIZE key display
Expected: Gain set to appropriate level

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

ESU interference detected

Poor electrode site preparation or excessive electrosurgical unit (ESU) cautery noise affecting ECG signal

Ranked causes

1. Poor electrode site preparation (common)
2. Faulty or dirty electrodes (common)
3. Excessive high frequency noise (occasional)

First check

Inspect electrode application sites

Test point: Electrode placement areas on patient skin
Expected: Clean skin with good electrode-to-skin contact

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

False apnea alarm patient safety

Apnea alarm triggers when patient is actually breathing

Ranked causes

1. Apnea delay improperly set (common)
2. Patient having frequent CVA episodes (occasional)
3. Scale size too low (occasional)

First check

Verify apnea delay setting

Test point: Monitor alarm settings menu
Expected: Apnea delay set appropriately for patient

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

Gas Module air leak detected caution

Pneumatic leak detected in system; may also indicate missing sample line, disconnected module, or prolonged offline operation

Ranked causes

1. Pneumatic leak in system (common)
2. Gas Module on without sample line attached (occasional)
3. Gas Module on extended time without Passport (occasional)

First check

Turn off Gas Module and Passport

Test point: Power switches
Expected: Both units powered down

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

Gas Module occlusion in sampling line caution

Obstruction detected in sampling line or water trap bottle full

Ranked causes

1. Water trap bottle full (common)
2. Sampling line blocked (common)
3. Filter blocked (common)

First check

Check water trap level

Test point: Water trap reservoir
Expected: Fluid level below fill mark

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

Intermittent ECG signal

Signal drops out or disconnects intermittently during monitoring

Ranked causes

1. Connections not tight and properly secured (common)
2. Electrodes dry (common)
3. Cable or lead wires damaged (occasional)

First check

Verify electrode to lead connection

Test point: Electrode snap connectors
Expected: Connections tight and fully seated

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

Noisy ECG trace

Excessive noise or interference on ECG waveform

Ranked causes

1. Loose or dry electrodes (common)
2. Defective electrode wires (occasional)
3. Patient cable too close to electrical devices (common)

First check

Inspect electrode condition and contact

Test point: All electrode pads
Expected: Electrodes fresh, adhesive intact, good skin contact

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

Alarm tone or QRS tone disabled

Audio alert not sounding when expected

Ranked causes

1. Mute key pressed (common)
2. Beep volume low (common)

First check

Check mute symbol

Test point: Monitor display screen
Expected: No alarm mute symbol visible

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

Calibration: Battery Voltage

Battery voltage verification and low battery warning threshold confirmation

Ranked causes

1. Battery voltage below nominal or triggering low battery warning (unknown)
2. System shutdown voltage threshold reached (unknown)

First check

Measure battery voltage

Test point: Battery supply
Expected: 12 V DC nominal

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

Calibration: CO2 Sensor

Perform Capnostat CO2 sensor calibration procedure using zero cell and airway adapter when sensor is first connected or monitor requests it

Ranked causes

1. First sensor connection to monitor (common)
2. Sensor replacement or monitor request (occasional)

First check

Plug Capnostat CO2 sensor into monitor CO2 connector

Test point: Passport XG CO2 connector (34)
Expected: CO2: Sensor Warming Up message displayed

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

Calibration: Sidestream pump calibration and flow verification caution

Verify proper flow rate of Sidestream CO2 pump. Tubing configuration or sampling cell adapter changes require recalibration. Pump calibration also calibrates adapter.

Ranked causes

1. Tubing configuration or adapter changed (occasional)
2. Occlusion detection verification (occasional)

First check

Power on unit and assemble calibration parts

Test point: Calibration kit assembly
Expected: Parts assembled per Figure 7-13, connected to pump input

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

Calibration: Video Controller Test

Video controller diagnostics - verifies CPU Board LCD output signals driving video controller

Ranked causes

1. CPU Board defective - incorrect LCD signals output (occasional)
2. Display Assembly faulty - loading LCD signals incorrectly (occasional)

First check

Run Video Controller Test to generate vertical bar pattern

Test point: Display output and CPU Board LCD output signals
Expected: Vertical bars fill entire screen or half screen depending on software version

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

CO2 adapter calibration failure

Adapter calibration did not complete successfully

Ranked causes

1. Sensor not fully warmed up (common)
2. Sensor not correctly installed on airway adapter (common)

First check

Verify sensor warmup status

Test point: Warmup indicator
Expected: Warmup cycle complete

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

CO2 sensor out of calibration or damaged

CO2: CHECK SENSOR message displayed, sensor out of calibration or defective

Ranked causes

1. CO2 sensor requires zero calibration (common)
2. CO2 sensor damaged or defective (occasional)

First check

Perform CO2 zero calibration

Test point: CO2 menu calibration function
Expected: Calibration completes with message clears

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

Gas Module disconnected

Passport cannot detect signals from Gas Module

Ranked causes

1. Gas Module not powered on (common)
2. Interface cable not properly connected (common)

First check

Verify Gas Module power status

Test point: Gas Module power indicator
Expected: Power indicator lit or display active

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

NIBP measurement unable to complete patient safety

NIBP: UNABLE TO MEASURE message displayed after unsuccessful measurement cycle

Ranked causes

1. Cuff leaks or poor peripheral pulses (common)
2. Excessive patient movement (common)

First check

Inspect cuff and tubing for leaks

Test point: Cuff connection to monitor
Expected: No air leaks

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

No trace for desired parameter

Waveform not displaying for requested parameter

Ranked causes

1. Improper transducer attachment to monitor (common)
2. Faulty transducer (occasional)

First check

Inspect transducer connection

Test point: Transducer cable and monitor input
Expected: Cable fully seated and secure

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

Respiration waveform too small

Respiration waveform displayed with insufficient amplitude

Ranked causes

1. Patient breathing shallow or turned on side (common)
2. Scale set inappropriately (common)

First check

Verify patient position and breathing

Test point: Patient observation
Expected: Patient breathing deeply and upright

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

Sidestream CO2 setup for intubated patients patient safety

Installation and initialization of Capnostat CO2 sensor, airway adapter, disc filter, capillary tubing, and nafion tubing for monitoring intubated patients with sampling from breathing circuit

Ranked causes

1. Initial setup procedure for intubated CO2 monitoring (common)
2. Tubing configuration changes requiring pump recalibration (occasional)

First check

Verify sensor warming message clears

Test point: Monitor display
Expected: 'CO2: Sensor Warming Up' message disappears

2 more checks with pass and fail actions, 9 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

SpO2 below calibrated range

SpO2 UNCALIBRATED message displayed, detected SpO2 falls below calibrated range

Ranked causes

1. Patient desaturation or critical SpO2 level (occasional)
2. Sensor malfunction or contamination (occasional)

First check

Assess patient oxygenation status

Test point: Patient respiratory status
Expected: Adequate oxygenation given clinical context

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

SpO2 pulse rate above 250 bpm patient safety

SpO2 PR OVER 250 message displayed, detected pulse rate extremely high

Ranked causes

1. Excessive patient movement or artifact (common)
2. Severe tachycardia (occasional)

First check

Reduce patient movement

Test point: Patient extremity with sensor
Expected: No visible motion during measurement

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

SpO2 pulse rate below 30 bpm patient safety

SpO2 PR UNDER 30 message displayed, detected pulse rate extremely low

Ranked causes

1. Severe bradycardia or patient condition change (occasional)
2. Sensor misalignment or loose placement (occasional)

First check

Assess patient's clinical status

Test point: Patient vital signs and condition
Expected: HR appropriate for patient condition

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

SpO2 sensor malfunction or misalignment

SpO2 CHECK SENSOR message displayed, insufficient light reaching detector

Ranked causes

1. Emitter and detector not properly aligned (common)
2. Sensor malfunction or damage (occasional)

First check

Inspect sensor alignment on patient extremity

Test point: Sensor emitter and detector position
Expected: Proper alignment across extremity

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

SpO2 signal interference detected

SpO2 INTERFERENCE message displayed, noise prevents pulse discrimination

Ranked causes

1. Patient movement during measurement (common)
2. Loose or improperly positioned sensor (common)

First check

Instruct patient to remain still

Test point: Patient extremity
Expected: No visible movement during measurement

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

Adapter calibration patient safety

Procedure to calibrate airway adapter when replaced or 'Check Adapter' message displays

Ranked causes

1. Airway adapter replaced or Check Adapter message (occasional)

First check

Wait for sensor warming

Test point: Monitor display
Expected: 'CO2: Sensor Warming Up' message disappears

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

Calibration: Battery operation verification caution

Verify battery-backed operation when main power removed. Two batteries required; unit must operate on either battery alone.

Ranked causes

1. Power supply or battery verification required (common)

First check

Verify power supply connected and batteries removed

Test point: Power Supply Module, battery bay
Expected: Power supply connected to appropriate source, D.C. plug connected, no batteries installed

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

Calibration: CO2 adapter

CO2 sensor must be calibrated on airway adapter after zero calibration. Sensor should be removed from zero or reference cell and placed on the airway adapter to complete adapter calibration.

Ranked causes

1. Adapter calibration required after zero calibration (common)

First check

Ensure sensor is on airway adapter

Test point: airway adapter
Expected: sensor seated on adapter

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

Calibration: CO2 adapter calibration

Compensate for optical differences when switching between adult and neonatal airway adapters for mainstream CO2 operation

Ranked causes

1. Adapter type switched (common)

First check

Ensure sensor warm-up complete

Test point: Monitor display
Expected: 'Sensor Warming Up' message must not be displayed

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

Calibration: CO2 sensor calibration

Calibrate Capnostat CO2 sensor when first connected to monitor or when monitor requests it

Ranked causes

1. New sensor connected or monitor requests calibration (common)

First check

Verify monitor power and sensor connection

Test point: Passport XG display
Expected: Monitor on, Capnostat plugged in

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

Calibration: CO2 sensor calibration verification

Verify CO2 sensor calibration accuracy using reference cell; should be performed at least once weekly

Ranked causes

1. Routine maintenance (common)

First check

Verify monitor power status

Test point: Passport display
Expected: Monitor turned on

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

Calibration: CO2 sensor zero

CO2 sensor must be calibrated on zero cell to establish baseline. ETCO2 reading should be 0 when sensor is positioned on the zero cell located on the sensor cable adjacent to connector.

Ranked causes

1. Zero calibration required for sensor baseline (common)

First check

Verify ETCO2 reading on zero cell

Test point: zero cell
Expected: 0
Tools: monitor display

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

Calibration: Date and time verification

Verify date and time displayed in upper left of LCD. If incorrect, use freeze key during self-test to enter configuration menu.

Ranked causes

1. Incorrect date or time in unit (unknown)

First check

Observe date and time in upper left LCD corner during startup

Test point: LCD display upper left area
Expected: Correct current date and time

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

Calibration: ECG amplitude and gain verification

Verify ECG display scaling accuracy by testing multiple amplitude and size settings with expected pixel measurements

Ranked causes

1. ECG gain adjustment or display scaling error (unknown)

First check

Set simulator to 5 Hz 1 mV sine wave, Passport lead 1, size 1 cm/mV

Test point: Waveform 1 screen with FREEZE active
Expected: 10 mm peak-to-peak +/- 1 mm; overall trace 10 cm +/- 2 mm

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

Calibration: ECG heart rate detection and alarm patient safety

Verify heart rate calculation accuracy across range and alarm function with HI/LO thresholds and muting capability

Ranked causes

1. ECG heart rate detection algorithm error or processing lag (unknown)

First check

Set simulator to ECG QRS, rate 252 bpm

Test point: HR display on LCD
Expected: 252 +/- 8 bpm, +/- 8 bpm

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

Calibration: ECG lead detection and messaging

Verify ECG responds to disconnected leads by displaying flat line and appropriate LEAD OFF message for each lead

Ranked causes

1. ECG lead detection circuit malfunction (unknown)

First check

Disconnect RA lead from simulator

Test point: RA input connector
Expected: Flat line display and 'LEAD OFF: RA' message

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

Calibration: ECG noise and pacer detection

Verify noise suppression and pacer pulse detection with simulator set to SHORT LEADS and Ventricular Pacer mode

Ranked causes

1. ECG input filtering or pacer detection circuit failure (unknown)

First check

Set simulator to SHORT LEADS

Test point: ECG display
Expected: Noise does not exceed one pixel resolution

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

Calibration: ECG signal display and sweep timing

Verify ECG trace sweeps across waveform screens in correct timing with complete cycles displayed at specified speeds

Ranked causes

1. ECG processing or display timing error (unknown)

First check

Observe ECG trace sweep timing on Waveform 1

Test point: Waveform 1 screen
Expected: Trace completes sweep in 2 seconds with 2 complete ECG cycles

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

Calibration: ECG trend data recording

Verify high heart rate value recorded in trend data and highlighted in reverse video after alarm violation

Ranked causes

1. Trend data storage or display error (unknown)

First check

Press TREND/RETURN key after HR alarm violation

Test point: Trend data display
Expected: High HR value (125 bpm) shown in reverse video

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

Calibration: External Communication

External communication channel loop test - data transmission and echo verification

Ranked causes

1. Character echo error on external communication channel (unknown)

First check

Verify character echo on external communication

Test point: External communication channel
Expected: Every character echoed back correctly

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

Calibration: External Voltage high voltage

External DC power supply voltage verification during operation

Ranked causes

1. External voltage out of specification (unknown)

First check

Measure external power supply voltage

Test point: External DC power input
Expected: 15.6 - 17.6 Volts, 15.6 to 17.6 V

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

Calibration: Gas Module patient safety

Perform gas module zero and span calibration to verify and adjust accuracy of anesthetic gas, O2, N2O and CO2 measurements

Ranked causes

1. Initial setup or periodic accuracy verification (common)

First check

Warm up gas module to full temperature

Test point: Gas module
Expected: Module fully warmed (30 minutes recommended)

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

Calibration: IBP1 and IBP2 zeroing and accuracy

Verify IBP pressure channel zeroing function and measurement accuracy across pressure range with dual channels at different values

Ranked causes

1. IBP transducer not zeroed or calibration error (common)

First check

Set simulator to 0 mmHg for both IBP1 and IBP2

Test point: Pressure source
Expected: Both channels display dashed lines before zeroing

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

Calibration: LCD display contrast

Verify front panel contrast control adjusts display brightness from completely white to completely blue

Ranked causes

1. Contrast control out of range or LCD failure (rare)

First check

Set contrast control fully up

Test point: Front panel contrast control
Expected: LCD display completely white

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

Calibration: Mainstream CO2 adapter calibration caution

Perform adapter calibration when switching between adult and neonatal airway adapters or after Check Adapter message. Must occur when sensor not warming.

Ranked causes

1. CO2 adapter optical mismatch between adult and neonatal (occasional)

First check

Verify Sensor Warming Up message NOT displayed

Test point: CO2 waveform window
Expected: No 'Sensor Warming Up' message visible

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

Calibration: Mainstream CO2 sensor verification

Reference cell calibration verification to ensure sensor accuracy. Passport turned on, Capnostat connected and warmed-up.

Ranked causes

1. Sensor requires periodic verification (common)

First check

Verify Passport powered on and Capnostat connected

Test point: Capnostat connection and warm-up indicator
Expected: Capnostat warmed-up and connected

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

Calibration: Mainstream CO2 sensor zero calibration

Full sensor calibration required first time sensor connects to monitor or when monitor requests it. Sensor must be warmed up before starting.

Ranked causes

1. New sensor or sensor requires recalibration (common)

First check

Verify Passport powered on and sensor warmed

Test point: Capnostat warm-up indicator
Expected: Sensor Warming Up message not displayed

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

More symptoms

Calibration: NIBP Communication
Calibration: NIBP measurement cycle and cuff inflation/deflation
Calibration: Sidestream adapter calibration
Calibration: Sidestream CO2 sensor verification
Calibration: Sidestream CO2 sensor zero calibration
Calibration: SpO2 Accuracy Test
Calibration: SpO2 sensor detection and pleth waveform
Calibration: SpO2 shared RAM memory
Calibration: Temperature sensor accuracy with 700 and 400 series probes
CO2 breaths detected during pump calibration
CO2 calibration failed - adapter not inserted
CO2 calibration failed - zero cell not inserted
CO2 sensor not connected
CO2 sensor positioned on reference cell
CO2 sensor positioned on zero cell
CO2 sensor reference cell check
CO2 sensor warming up
CO2 sidestream on neonate not allowed
CO2 sidestream pump calibration failure
CO2 sidestream pump failure
CO2 subsystem failure
CO2 subsystem initialization in progress
CO2 zero calibration failure
CO2 zero calibration in progress
Cosmetic checks and hardware inspection
CVA message displayed
DAC waveform irregular
ECG trace not moving
Excessive electrosurgical interference
Gas Module agent mismatch - Desflurane
Gas Module agent mismatch - Enflurane
Gas Module agent mismatch - Halothane
Gas Module agent mismatch - Isoflurane
Gas Module agent mismatch - Sevoflurane
Gas Module anesthetic agent sensor uncalibrated
Gas Module anesthetic agent zero error
Gas Module calibration error - sampling error all channels
Gas Module calibration error - zeroing error
Gas Module calibration not started
Gas Module cannot zero - retrying
Gas Module CO2 sensor uncalibrated
Gas Module CO2 zero error
Gas Module end tidal anesthetic agent high
Gas Module end tidal anesthetic agent low
Gas Module end tidal CO2 high
Gas Module end tidal CO2 low
Gas Module end tidal O2 high
Gas Module end tidal O2 low
Gas Module exhaust blocked
Gas Module failed
Gas Module inspired anesthetic agent high
Gas Module inspired anesthetic agent low
Gas Module inspired CO2 high
Gas Module inspired N2O high
Gas Module inspired O2 high
Gas Module inspired O2 low
Gas Module mixed anesthetic agents detected
Gas Module N2O sensor uncalibrated
Gas Module N2O zero error
Gas Module O2 sensor uncalibrated
Gas Module O2 zero error
Gas Module pump off due to pneumatic error
Gas Module respiration rate high
Gas Module respiration rate low
Gas Module sampling error during calibration
Gas Module unknown anesthetic agent detected
Gas Module warm-up for measurement
Gas Module water trap needs replacement
Lead off of patient
Leakage current test: Lead to ground sink current with line voltage
Leakage current test: Source current chassis to ground
Low amplitude ECG
NIBP cuff overpressure detected
NIBP measurement fails with motion detected
NIBP system failure detected
NIBP system initialization delayed
NIBP unable to detect pulse at highest cuff pressure
Pump calibration
Recorder door open
Recorder paper depleted
Recorder report appears blank
Respiration waveform too large
Sidestream CO2 setup for non-intubated patients
SpO2 excessive ambient light interference
SpO2 low perfusion condition
SpO2 no pulse detected
SpO2 pulse search in progress
SpO2 sensor not connected to patient
SpO2 sensor not detected
SpO2 system failure with ROM, RAM or filter error
SpO2 system self-test in progress
SpO2 unknown or unrecognized sensor detected
SpO2 weak pulse detected
Temperature probes not working
Wandering ECG baseline

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

Error codes

Code	Meaning	Trigger	Severity
`ARTIFACT`	Line frequency noise detected on ECG waveform	50 or 60 Hz noise detected on ECG	warning
`CO2: ADAPTER CAL COMPLETE`	Adapter calibration of CO2 sensor completed successfully	Adapter calibration finished	info
`CO2: ADAPTER CAL FAILURE`	Adapter calibration of CO2 sensor failed	Adapter calibration did not complete successfully	warning
`CO2: ADAPTER CAL IN PROGRESS`	Adapter calibration of CO2 sensor is in progress	CO2 adapter calibration requested	info
`CO2: CAL FAILED - INSERT ADAPTER`	Adapter calibration attempted while sensor on zero or reference cell	Adapter calibration attempted while sensor attached to zero or reference cell	error
`CO2: CAL FAILED - INSERT ZERO CELL`	Zero calibration attempted without sensor attached to zero cell	Zero calibration attempted while sensor not attached to zero cell	error
`CO2: FAILURE`	CO2 subsystem has failed	CO2 subsystem malfunction detected	critical
`CO2: ZERO CAL COMPLETE`	Zero calibration of CO2 sensor completed successfully	Zero calibration finished	info
`CO2: ZERO CAL FAILURE`	Zero calibration of CO2 sensor failed	Zero calibration did not complete successfully	warning
`CO2: ZERO CAL IN PROGRESS`	Zero calibration of CO2 sensor is in progress	Sensor placed on zero cell and zero calibration requested	info
`DIAGNOSTICS IN PROGRESS`	Self test is being performed	Monitor self-test initiated	info
`ESU INTERFERENCE`	Excessive electrosurgical unit noise detected on ECG	Poor electrode preparation or excessive cautery noise	warning
`INTERFERENCE`	Excessive electrical noise detected on ECG	Poor electrode site preparation, improper lead selection, or excessive line frequency noise	warning
`LEAD FAULT`	Lead off of patient detected	ECG lead disconnected from patient	warning
`SELF TEST COMPLETE`	Diagnostics OK	Self-test completed successfully	info

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

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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.