Patient monitor modules · Carescape family

GE Healthcare Carescape Modules: troubleshooting and error codes

The ServiceForge knowledge base holds 343 documented symptoms for the GE Healthcare Carescape Modules, with 553 ranked causes, 489 diagnostic checks with test points and expected values, and 117 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

NIBP hardware error

Parameter window message 'Call Service: Error x' indicating NIBP module hardware fault; message stays on screen until problem is fixed

Ranked causes

1. RAM failure (error x=0) (rare)
2. ROM checksum failure (error x=1) (rare)
3. +15V supply failure (error x=2) (rare)
4. -15V supply failure (error x=3) (rare)
5. ADC error (error x=6) (rare)
6. Watchdog timer too short (error x=7) (rare)
7. Watchdog timer too long (error x=8) (rare)
8. Watchdog activated (error x=9) (rare)
9. EEPROM checksum error (error x=10) (rare)
10. Autozero range exceeded (error x=11) (rare)
11. Communication watchdog activated (error x=12) (rare)
12. Too early autocycle start (error x=14) (rare)

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

NIBP air leakage patient safety

Alarm or parameter window message indicating air is leaking from cuff, hose, internal tubes, or module components during pressure measurement

Ranked causes

1. Cuff physically damaged (occasional)
2. Cuff or hose connector damaged or O-ring missing (occasional)
3. NIBP cuff hose double connector damaged (rare)
4. Leakage in patient connector panel tubing (occasional)
5. Internal module tubing leakage (rare)
6. Tube disconnected or damaged (occasional)
7. Manifold leakage (rare)
8. Valves or connecting tubes damaged (rare)

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

Module not appearing on monitor display

Parameter module connected to frame but measurements not shown on display; either specific module data missing or all non-PSM/PDM modules not visible

Ranked causes

1. Module not connected properly (common)
2. Module connector defective (occasional)
3. EMBC internal connectors defective or loose (occasional)
4. EMBC board defective (occasional)
5. Cable between frame and host not connected or defective (occasional)
6. DC/DC board defective (occasional)
7. Monitor display not configured for parameter (common)

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

Unstable O2 delivery affecting VO2 calculation patient safety

VO2 readings invalid or unreliable due to unstable oxygen delivery or gas mixer issues

Ranked causes

1. Unstable O2 delivery or gas mixer malfunction (occasional)
2. Respiratory rate over 35/min (occasional)
3. Reference gas inlet port blocked (occasional)
4. Gas sampling line longer than 2 m (occasional)
5. Dead space of Y-piece greater than 8 ml (occasional)
6. Gas sampling line connected to HME instead of D-lite (occasional)
7. D-lite incorrectly placed in circuit (occasional)

First check

Display oxygram and assess curve stability

Test point: Monitor VO2 waveform display
Expected: Stable, consistent oxygram curve

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

Measurement(s) removed from display

Alarm area shows 'XXXX measurement(s) removed'; module data no longer visible on monitor

Ranked causes

1. Module not connected properly (common)
2. Module connector defective (occasional)
3. Frame not properly connected to host (occasional)
4. EMBC board connectors loose inside frame (occasional)
5. EMBC board defective (occasional)
6. DC/DC board defective (occasional)

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

NIBP cuff loose or disconnected patient safety

Alarm or parameter window message indicating blood pressure cuff is not properly connected, loosely wrapped, or has internal air leakage

Ranked causes

1. Cuff or hose not connected to module (common)
2. Cuff loosely wrapped on patient arm (common)
3. Air leakage in shielding or connectors (occasional)
4. Cuff or hose air leakage (occasional)
5. Internal module tubing leak (rare)
6. NIBP pump failure (occasional)

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

NIBP weak pulsation signal patient safety

Parameter window message indicating weak oscillation or poor signal quality due to weak blood circulation, improper cuff position, or small air leakage

Ranked causes

1. Weak or abnormal blood circulation (common)
2. Improper cuff position or attachment (common)
3. Slow heart rate with artifacts (occasional)
4. Diastolic pressure measurement problems (occasional)
5. Small air leakage (occasional)
6. Insufficient measurement data due to artifacts (occasional)

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

Gas sensor indicates INOP patient safety

Waveform field or parameter window displays INOP; gas measurement unavailable from respiratory module

Ranked causes

1. MiniOM unit internal failure (temperature, supply voltage, other) (common)
2. MiniTPX unit failure (temperature, supply voltage, IR lamp) (common)
3. MiniPVX unit failure (pressure sensor, supply voltage) (occasional)
4. CPU failure (supply voltage, pressure sensor, A/D converter) (occasional)
5. Other failures (fan, pump, valve, zeroing, CO2 reference) (occasional)

First check

Check flex cable connection

Test point: Module flex cable
Expected: Secure connection

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

Low gas sample flow rate patient safety

Sample flow below 80% of module nominal value, affecting measurement accuracy

Ranked causes

1. Gas sampling line blocked (common)
2. Water trap blocked or full (common)
3. Sample gas output blocked (common)
4. Internal tubing blocked (occasional)
5. Pump unit failure (occasional)

First check

Measure sample flow rate in calibration menu

Test point: Flow rate display
Expected: At least 80% of module nominal flow value

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

No temperature displayed on monitor patient safety

Temperature parameter window not showing any temperature value or waveform; measurement completely absent from display

Ranked causes

1. Temperature channel not configured to screen display (common)
2. Incompatible temperature probe installed (occasional)
3. Temperature probe type setting (STP/TP/ST) incorrect (occasional)
4. Faulty temperature probe (occasional)
5. Temperature measurement out of range (rare)

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

Too high Ppeak patient safety

Peak inspiratory pressure measurement reads abnormally elevated

Ranked causes

1. Bronchospasm (common)
2. Patient coughing (common)
3. Patient breathing against ventilator (common)
4. Obstruction in airways (occasional)
5. HME obstructed (occasional)

First check

Assess for acute bronchospasm

Test point: Patient clinical status and breath sounds
Expected: Normal breath sounds, no wheezing or stridor

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

Check sample line message

Message displayed in parameter window or alarm area indicating sampling line issue.

Ranked causes

1. Water, mucus, or contamination in sampling line (common)
2. Sampling line crimped, pinched, or damaged (common)
3. Gas outlet port obstructed (occasional)
4. Pressure changes or gas leak (occasional)

First check

Visual inspection for contamination in sampling line

Test point: Sampling line interior
Expected: Clear, no water, mucus, or debris visible

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

Communication LED not lit

Communication LED indicator on module does not illuminate

Ranked causes

1. ePort to host interface cable damaged (common)
2. ePort connector on monitor damaged (occasional)
3. ePort interface on module damaged (occasional)
4. Module defective (rare)

First check

Inspect ePort cable

Test point: ePort to host interface cable
Expected: No visible damage, cuts, or bent pins

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

Gas sampling line blocked patient safety

Blockage in sampling system preventing gas flow from patient to sensor

Ranked causes

1. External gas sampling line blocked (common)
2. Water trap occluded (common)
3. Internal tubing blocked (common)
4. Sampling pump failure (occasional)

First check

Inspect external gas sampling line

Test point: Patient sampling line tubing
Expected: No visible blockages, kinks or condensation

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

Inspired tidal volume exceeds expired tidal volume (insp TV > exp TV) patient safety

Spirometry indicates inspired volume greater than expired volume; leak suspected in lungs or breathing circuit

Ranked causes

1. Leak in patient lungs, endotracheal tube cuff, or spirometry system (common)
2. Water inside D-lite or tubing (occasional)
3. Another side-stream gas sampling line between D-lite and patient causing bypass (occasional)
4. D-fend Pro filter leaking (occasional)

First check

Perform spirometry leak test

Test point: Spirometry circuit with patient connected
Expected: No leak detected; TVexp ≥ TVinsp

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

NIBP cuff occlusion patient safety

Parameter window message indicating air path from cuff or tubing is blocked or kinked, preventing proper inflation and measurement

Ranked causes

1. Cuff or hose tubing kinked or occluded (common)
2. Pressure transducer failure (occasional)
3. A/D converter fault (occasional)
4. NIBP calibration fault (occasional)

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

No invasive pressure signal patient safety

No invasive pressure waveform or values displayed on monitor; measurement completely absent

Ranked causes

1. Defective invasive pressure transducer (occasional)
2. Invasive pressure module not connected to monitor (common)
3. Transducer adapter cable not connected to module (common)
4. Invasive pressure channel not configured or displayed (occasional)

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

No parameter data from module

Parameter window shows no data output from module due to cable or interface issue

Ranked causes

1. Parameter cable disconnected (common)
2. Parameter interface damaged (occasional)
3. Related parameter license not activated (occasional)
4. Monitor not configured to display parameter (occasional)

First check

Verify cable connection

Test point: Parameter cable connector
Expected: Cable fully seated and tight

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

No power at module

Module does not power on when connected to monitor

Ranked causes

1. ePort cable damaged (common)
2. Monitor ePort connector damaged (occasional)
3. Module ePort interface damaged (occasional)
4. Module battery not charging (occasional)

First check

Inspect ePort cable integrity

Test point: ePort to host interface cable
Expected: No damage visible

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

No pressure measurement available patient safety

No invasive pressure waveform or value displayed. No signal detected.

Ranked causes

1. Defective transducer (occasional)
2. Module not connected (common)
3. Transducer adapter cable not connected to module (common)
4. Invasive pressure channel not configured on display (occasional)

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

Pulse search NIBP measurement patient safety

Parameter window displays pulse search message during NIBP initialization or due to sensor/cable fault

Ranked causes

1. Normal NIBP measurement startup (common)
2. Defective or damaged sensor or cable (occasional)
3. Sensor off patient (common)
4. Repeatable pulse detection failed (occasional)

First check

Wait for pulse detection

Test point: NIBP measurement display
Expected: Waveform and pressure values displayed

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

Sample gas outflow blocked patient safety

Exhaust line from module is occluded, preventing return of sampled gas to patient or scavenging system

Ranked causes

1. Sample gas out connector or exhaust line blocked (common)
2. Return tubing to patient circuit occluded (occasional)
3. Scavenging system not open to room pressure (occasional)
4. Internal tubing blocked or pump failure (occasional)

First check

Inspect sample gas out connector and exhaust line

Test point: Front panel outlet and exhaust tubing
Expected: No visible blockages or obstructions

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

Sample line blocked patient safety

Continuous blockage message in parameter window, waveform field, or alarm area

Ranked causes

1. Gas sampling line blocked (common)
2. Water trap container full (common)
3. Water trap occluded (occasional)
4. Internal tubing blocked (occasional)

First check

Inspect external sampling line

Test point: External gas sampling line
Expected: Clear, no blockages

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

Strongly vibrating loop patient safety

Loop display shows excessive vibration or oscillation, volumes appear too large or too small

Ranked causes

1. Mucus in endotracheal tube (common)
2. Water or secretions in hoses or D-lite (common)
3. Wrong mode or sensor selection (occasional)
4. Incorrect sensor type selected (occasional)

First check

Assess patient airway status and secretion level

Test point: Patient ET tube and airway
Expected: Patent airway, minimal secretions

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

Too high Raw patient safety

Airway resistance measurement reads abnormally high, indicating increased airway obstruction

Ranked causes

1. Kink in tubing (common)
2. Mucus in airway (common)
3. Asthmatic patient or bronchospasm (occasional)
4. Spontaneous or patient-triggered breaths with breathing effort against ventilator (occasional)

First check

Visually inspect all tubing for kinks or compression

Test point: Entire spirometry and patient circuit tubing
Expected: Straight, unobstructed tubing; free flow

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

Water trap blockage or leakage patient safety

Messages appear for water trap issues, sampling system not functioning properly

Ranked causes

1. Water trap not connected (common)
2. Air leak inside internal tubing (common)
3. Water trap container full (occasional)
4. Defective or contaminated Mini D-fend water trap (occasional)

First check

Inspect water trap connection and condition

Test point: Water trap connector on front panel
Expected: Water trap properly connected, no visible damage

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

Battery not charging

Module battery does not charge when connected to charger or docking station

Ranked causes

1. Battery tray damaged (occasional)
2. Battery connector damaged (occasional)
3. Battery defective (occasional)

First check

Inspect battery tray

Test point: Battery compartment tray
Expected: Tray undamaged and properly seated

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

Calibration error

Calibration error message in parameter window or calibration menu

Ranked causes

1. Calibration gas not fed within 1 minute after zeroing (common)
2. Calibration failed due to large gain adjustment (occasional)
3. Wrong calibration gas used (common)

First check

Verify calibration gas supply started within 1 minute

Test point: Gas supply timing
Expected: Gas fed within 60 seconds of zeroing completion

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

Calibration error - gas not supplied or gain adjustment issue

Calibration failed due to calibration gas not supplied within 1 minute or excessive gain adjustment

Ranked causes

1. Calibration gas not supplied within 1 minute of zeroing (common)
2. Calibration failed due to excessive gain adjustment (occasional)
3. Wrong calibration gas used (occasional)

First check

Verify correct calibration gas bottle connected and pressurized

Test point: Calibration gas supply at module inlet
Expected: Specified calibration gas connected and pressure available

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

Calibration failed patient safety

Message appears in parameter window. Pressure calibration did not complete successfully.

Ranked causes

1. Pulsating waveform detected during calibration (occasional)
2. Gain beyond limits (±20% of default) (occasional)
3. Defective transducer (rare)

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

Calibration not available during alarm condition

Gas calibration unavailable when alarm conditions present (sample line blocked, D-fend check, gas out check)

Ranked causes

1. Sample line blocked alarm active (common)
2. D-fend check alarm active (common)
3. Sample gas out check alarm active (common)

First check

Check for active alarms in alarm area

Test point: Alarm area display
Expected: No active alarm messages; clear alarms before calibration

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

Calibration: Invasive pressure patient safety

Module invasive pressure measurement requires calibration when transducer is replaced, calibration check fails, or reading exceeds specification limits.

Ranked causes

1. New pressure transducer installed (common)
2. Previous calibration check failed (occasional)
3. Measured value outside specification limits (occasional)

First check

Verify module is connected to monitor

Test point: Module connection port
Expected: Module actively connected

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

ECG waveforms not displayed or noisy patient safety

ECG leads II, V1, aVL and all 12-lead waveforms not appearing or contain excessive noise

Ranked causes

1. Leadwire not properly connected or disconnected (common)
2. ECG signal path noise or interference (occasional)
3. Simulator not configured correctly or not generating ECG signal (occasional)

First check

Verify ECG leads II, V1, aVL display with waveforms

Test point: ECG waveform fields on monitor screen
Expected: All three leads displayed simultaneously with noise-free waveforms and 80±5 bpm heart rate, ±5 bpm
Tools: Multiparameter patient simulator, 12-lead ECG trunk cable, 5-leadwire sets

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

Expired volume much smaller than inspired volume (MVexp<<MVinsp) patient safety

Spirometry indicates expired volume ≤70% of inspired volume; likely leak in breathing circuit

Ranked causes

1. Leaking or occluded spirometry tube (common)
2. Water in spirometry tubing (occasional)
3. MiniPVX sensor failure (occasional)

First check

Perform spirometry leak test

Test point: Spirometry circuit
Expected: No leak detected; TVexp ≥70% TVinsp

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

Fluctuating Raw patient safety

Airway resistance (Raw) value fluctuates or varies abnormally during breath cycle

Ranked causes

1. Mucus in airways or tubings (common)
2. Breathing effort against ventilator; patient-triggered or spontaneous breaths (common)
3. Ventilator expiratory valve causing fluctuations during expiratory flow (occasional)

First check

Inspect spirometry circuit for secretions

Test point: Tubing and D-fend Pro sensor
Expected: Clear of mucus and secretions

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

Invasive pressure calibration failure patient safety

Automatic calibration did not complete; timeout or error condition detected during pressure calibration

Ranked causes

1. Pulsating waveform during calibration (common)
2. Gain beyond limits (outside ±20% of default) (occasional)
3. Defective transducer (occasional)

First check

Verify static pressure applied during calibration

Test point: Manometer reading during calibration
Expected: 100-300 mmHg static pressure (no pulsation)

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

Loop overscale patient safety

Monitored volumes displayed less than set volumes, loop scaling appears incorrect

Ranked causes

1. Wrong scale selected (common)
2. Wrong TV base selected (common)
3. Leak between ventilator and D-lite (occasional)

First check

Verify volume scale setting on display

Test point: Monitor display scaling menu
Expected: Scale matches current tidal volume range

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

Measurement off (impedance respiration)

Parameter window or waveform displays 'Measurement off'; ECG leads not connected or measurement disabled in setup menu, or ECG source is telemetry

Ranked causes

1. ECG leads disconnected from patient (common)
2. Impedance respiration measurement disabled in setup menu (occasional)
3. ECG source is telemetry (rare)

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

Module not functioning

Module fails to respond to key press, parameters not displayed, or communication error indicated

Ranked causes

1. Loose keypad cable or internal module connection (common)
2. Module incompatibility or configuration error (occasional)
3. Defective accessory or sensor (occasional)

First check

Visual inspection of module and connectors

Test point: Front cover, front panel, connectors, module box and latch
Expected: Intact, clean, properly attached

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

NIBP not functioning patient safety

NIBP measurement does not operate or calibration cannot be completed

Ranked causes

1. NIBP not calibrated (common)
2. Cuff pressure not maintained (leak) (common)
3. NIBP assembly malfunction (occasional)

First check

Check calibration status

Test point: NIBP module status
Expected: Calibration completed within acceptable timeframe

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

No EntEEG waveform or Entropy display on screen patient safety

Entropy module not connected or parameter not configured/visible on display.

Ranked causes

1. Entropy module not connected (common)
2. Parameter not configured or priority too low (occasional)
3. Entropy not supported by active software (rare)

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

No pressure reading displayed patient safety

Invasive pressure parameter window shows no value; pressure waveform absent from display

Ranked causes

1. Defective pressure transducer (occasional)
2. Module not connected (common)
3. Transducer adapter cable not connected (common)

First check

Verify module is connected to monitor

Test point: module connectors
Expected: Module fully seated on monitor

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

Out of range VO2 or VCO2 in gas exchange patient safety

Parameter window displays Out of range; VO2 or VCO2 measurement is <0 or >999 ml/min and exceeds measurement range

Ranked causes

1. Gas sampling or spirometry lines incorrectly connected to airway or module (common)
2. Incorrect sensor type (D-lite vs Pedi Lite) selected in monitor menu (occasional)
3. FiO2 recently changed; VO2 out of range temporarily (occasional)

First check

Verify gas sampling and spirometry line connections

Test point: Airway connectors and module ports
Expected: All lines securely connected to airway and gas module

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

Response signal too weak

Response too weak message in parameter window; maximum gain insufficient to amplify response signal to measurable level

Ranked causes

1. Stimulus electrodes loose or incorrect placement (common)
2. Response electrodes disconnected (common)
3. Dry or degraded electrodes (occasional)

First check

Verify stimulus electrode placement and tightness

Test point: Stimulus electrode connections
Expected: Electrodes firmly seated on skin at correct anatomical location

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

Sensor INOP patient safety

Sensor INOP message in waveform field

Ranked causes

1. IR lamp failure (occasional)
2. Ambient pressure too high or low (occasional)
3. CPU failure or module communication issue (rare)

First check

Check miniTPX flex cable connection

Test point: miniTPX flex cable connector
Expected: Securely connected

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

Sensor INOP (inoperative)

Gas sensor inoperative; sensor not responding to gas measurement

Ranked causes

1. Ambient pressure too high or low (occasional)
2. No response from gas module (occasional)
3. High temperature inside module or EEPROM checksum failure (rare)

First check

Check ambient pressure reading in gas calibration menu

Test point: Calibration menu ambient pressure display
Expected: Pressure within normal operating range (typically 600-800 mmHg)

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

Sensor INOP in spirometry (MiniPVX) patient safety

Spirometry waveform field displays INOP; no response from MiniPVX measurement board or EEPROM checksum failure

Ranked causes

1. MiniPVX flex cable loose or disconnected (occasional)
2. Zero valve broken or internal failure (occasional)
3. EEPROM checksum failure or measurement board failure (rare)

First check

Verify MiniPVX flex cable connection

Test point: MiniPVX flex cable connector
Expected: Fully seated, secure

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

Strange or nonphysiological VO2 readings patient safety

Gas exchange (VO2) values appear abnormal or inconsistent with patient physiology

Ranked causes

1. Ventilation mode BiPAP/CPAP with high continuous bypass flow (occasional)
2. Presence of N2O or anesthetic agents in ICU applications (occasional)
3. Gas exchange not measurable (occasional)

First check

Select oxygram and verify curve stability

Test point: Monitor VO2 waveform display
Expected: Stable oxygram curve consistent with patient condition

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

Too low ETCO2 reading patient safety

Measured end-tidal CO2 value abnormally low compared to expected clinical range

Ranked causes

1. Leak in sampling system (common)
2. Calibration error (common)
3. High by-pass flow from ventilator (occasional)

First check

Check all gas connections for leaks

Test point: Water trap, sampling line, outlet connections
Expected: No hissing or leakage detected; tight connections

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

Transducer zeroing failed patient safety

Message 'Zeroing failed' displays in alarm area. Zeroing procedure could not complete. Possible causes: pulsating waveform detected, defective transducer, or offset exceeds 150 mmHg.

Ranked causes

1. Pulsating waveform detected during zeroing (occasional)
2. Defective transducer (occasional)
3. Offset exceeds 150 mmHg (rare)

First check

Verify transducer venting

Test point: Transducer venting stopcock or port
Expected: Transducer open to room air (0 mmHg reference)

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

Abnormally high or low CO2 response or sudden occlusion

Abnormal CO2 reading or sudden occlusion message. Response to CO2 is abnormally high or low.

Ranked causes

1. Optical blockage or dirt in adapter (common)
2. LoFlo Sidestream Module malfunction (occasional)

First check

Inspect and clean CO2 adapter

Test point: Adapter optical window
Expected: Adapter clean, no optical blockage

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

Apnea alarm not detected by monitor patient safety

Monitor does not activate apnea alarm when respiration stops or falls below alarm threshold for configured duration

Ranked causes

1. Simulator apnea simulation not activated or duration not set correctly (common)
2. Monitor apnea alarm disabled or threshold set too high (occasional)

First check

Configure simulator apnea simulation to 32 seconds

Test point: Simulator Apnea Simulation setting
Expected: Apnea Simulation set to '32 sec' and activated

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

Asystole alarm not appearing on monitor patient safety

Asystole (cardiac standstill) signal from simulator does not trigger alarm display

Ranked causes

1. Simulator not configured to output asystole signal (common)
2. Asystole alarm disabled or alarm volume muted on monitor (occasional)

First check

Configure simulator to output asystole

Test point: Simulator ECG waveform settings
Expected: Simulator configured to output 'Asystole' signal

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

BP (Arterial) analog output signal incorrect

Arterial BP waveform on oscilloscope does not match P1 waveform on monitor

Ranked causes

1. BP analog output cable disconnected or faulty (common)
2. Main board analog output circuit failure (occasional)

First check

Arterial BP analog output signal waveform comparison

Test point: Red wire (BP_ANALOG_OUT), Green wire (ANALOG_RETURN)
Expected: Oscilloscope waveform matches P1 waveform on monitor screen
Tools: Oscilloscope, unterminated Defib/Sync cable, simulator

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

C.O./CCO measurement calibration failed

Message 'Calibration fail' or 'CCO meas. fail' displays in C.O. menu or parameter window. Calibration procedure was unsuccessful.

Ranked causes

1. Calibration procedure unsuccessful (occasional)
2. C.O./CCO measurement failure (occasional)

First check

Verify module connections and status

Test point: C.O./CCO module and cable connections
Expected: Secure connections; module powered and responsive

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

Calibration failed: Invasive pressure

Pressure calibration failure detected; system message 'Calibration failed' in parameter window

Ranked causes

1. Pulsating waveform detected during calibration (occasional)
2. Gain beyond ±20% of default (occasional)

First check

Check manometer reading during calibration

Test point: Pressure calibration reference manometer
Expected: Static 100–300 mmHg pressure maintained throughout calibration

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

Calibration: Analog outputs caution

Analog outputs calibration performed after main board replacement or when measured values fall outside specification. Involves measuring DC voltages across ECG and invasive pressure (BP) analog output pins using digital voltmeter connected to unterminated defib sync cable.

Ranked causes

1. Main board replaced (unknown)
2. Measured analog output value outside specification limits (unknown)

First check

Turn monitor on and wait for normal screen

Test point: Monitor display
Expected: Normal operating screen displayed

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

Calibration: Invasive pressure (Calibration error) patient safety

Monitor displays Calibration Error message when pressure is not applied within 45 seconds after zeroing completion or if calibration process fails for other reasons.

Ranked causes

1. Pressure application delayed beyond 45 seconds after zeroing (common)
2. Calibration process failure for other reasons (occasional)

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

Calibration: NIBP caution

NIBP calibration must be performed after failed calibration check or when measured values fall outside specification limits. Involves connecting adult cuff and manometer to rigid cylinder, pressurizing to ~250 mmHg, then adjusting gain against manometer reading.

Ranked causes

1. NIBP calibration check failed (unknown)
2. Measured NIBP value outside specification limits (unknown)

First check

Turn monitor on and wait for normal screen

Test point: Monitor display
Expected: Normal operating screen displayed

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

CCO measurement stopped or not calibrated patient safety

Cardiac Output parameter window shows 'Not calibrated' or 'No CCO catheter'; CO waveform absent

Ranked causes

1. CCO not calibrated after module connection (common)
2. CCO catheter disconnected (occasional)

First check

Verify catheter and cable connections

Test point: CCO catheter connector, module CCO port
Expected: Catheter and cable securely connected

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

More symptoms

CO2 accuracy out of calibration
Defibrillator sync marker signal incorrect
ECG analog output signal incorrect
ECG artifact or noise on waveform
ECG lead off detection not functioning
ECG sync signal not available
EEG electrode impedance too high
EEG signal corrupted by muscle activity or external noise
Entropy sensor expired
ETCO2 over scale above 20%
ETCO2 over scale greater than 20%
EtCO2 overscale (>15% or >20%)
EtCO2 value too high
EtCO2 value too low
Expiratory tidal volume greater than inspiratory tidal volume
Incompatible or duplicate gas modules detected
Invasive pressure zeroing failure
Low gas sample flow
Marker in synchronization not working
Module cannot be placed properly in frame
Module will not dock
NIBP tubing is leaking
No P8 transducer detected
No response to patient breathing
No temperature displayed
Noisy waveforms and missing markers
P8 over range
P8 under range
Pacemaker spikes not detected on ECG
Pressure measurement artifact detected
Pressure measurement over range
Pressure over range condition
Replace D-fend Pro water trap
Replace D-fend water trap message
Respiration rate not displayed or incorrect
Sample flow rate out of specification
Sampling line disconnected
Sensor electrode poor contact
SpO2 reading not displayed or plethysmographic waveform missing
Temperature measurement error
Temperature module error or calibration failure
Too high ETCO2 reading
VO2 value invalid or no VO2 reading
Water trap not connected or air leak
Wrong sensor type connected
Zeroing error in spirometry
Abnormal CO2 response or sudden occlusion
Abnormally low invasive pressure
Abnormally low pressure invasive
Abnormally low pressure reading
Ambient pressure sensor reading incorrect
Apnea alarm deactivated
Apnea deactivated (impedance respiration)
Apnea detected (impedance respiration)
Artifact (muscle or noise)
Artifact detected (cardiac artifact on respiration)
Artifact detected in SpO2
Artifact in gas exchange measurement
Artifact in signal
Automatic sensor check disabled
BIS measurement removed
Bottom housing damaged
Bypass flow too high in gas exchange
C.O. measurement cable disconnected
C.O./CCO measurement calibration in progress
C.O./CCO module disconnected
Calibrating gas sensor - warm-up in progress
Calibration in progress
Calibration not available during warm-up period
Calibration verification
Calibration: BIS Module electrical safety
Calibration: Cardiac Output Module maintenance check
Calibration: Gas Calibration
Calibration: Invasive pressure (P1/P2)
Calibration: Invasive pressure (Zeroing failure)
Calibration: Masimo Module E-MASIMO
Calibration: Module Frame and Modules F5, F7
Calibration: NIBP (non-invasive blood pressure)
Calibration: Pressure Modules E-PT, E-PP
Calibration: Sample Flow Rate
Calibration: Sample flow rate adjustment
Calibration: Single-width Airway Module E-miniC
Calibration: Spirometry Flow Calibration
Calibration: Temperature
Calibration: Temperature (T1/T2)
Check SpO2 probe
Checking sensor message stays more than 2 minutes
CO cable off
CO measurement removed
CO2 adapter disconnected or faulty
CO2 pump goes off after prolonged occlusion
CO2 pump stopped
CO2 sensor overheating
CO2 sensor removed or disconnected
CO2 waveform clipped
Compliance value invalid
Confirm calibration message displayed
Corrective maintenance: Pressure Modules E-PT, E-PP
Demo data displayed
DSC error message displayed
Duplicate invasive pressure modules detected
E-LoFlo module and LoFlo Sidestream module not recognized
ECG measurement removed
ECG measurements removed
ECG module error
EEG headbox cable disconnected
EEG leads disconnected
EEG module disconnected from monitor
Electrical safety verification - Masimo Module
Electromagnetic interference detected
EMG recording electrodes disconnected or broken
Entropy cable disconnected
Entropy measurement starting up
Entropy module disconnected
Entropy sensor not attached to patient
Entropy simulator connected
EtCO2 > PaCO2 (arterial discrepancy)
ETCO2 higher than PaCO2
EtCO2 waveform clipped
Failure in Agent ID
Faulty ECG cable
Faulty SpO2 probe
Gas measurements removed
Gas measurements removed from display
Gas sensor warm-up delay
High BIS electrode impedance
High electrode impedance variation between leads
High-frequency noise during measurement
Humidity setting affects EtCO2 measurement accuracy
ICP channel requires separate zeroing
Identical C.O. modules message
Identical CO modules connected
Identical EEG modules connected
Identical gas modules detected
Identical IP8 modules connected
Identical SpO2 modules
Identical SpO2(2) sources detected
Identical temperature modules detected
Incompatible DSC detected
Incompatible gas module detected
Incompatible sensor detected
Incompatible SpO2 probe
Incompatible SpO2 probe installed
Invasive pressure channel over range
Invasive pressure channel under range
Invasive pressure channels not zeroed
Invasive pressure line disconnected
Invasive pressure not zeroed
Invasive pressure zero offset too high
Invasive pressure zeroing fails
Isoelectric (flatline) EEG detected
Lead I failed (impedance respiration)
Lead II failed (impedance respiration)
Lead off (single or multiple leads)
Lead RL-LL failed (impedance respiration)
Leads off (arrhythmia detection lost)
Low EEG signal amplitude
Low perfusion at measurement site
Low perfusion SpO2
Low signal quality SpO2
Low signal SpO2
Low SpO2 signal quality
Low volumes detected in spirometry
Measurement artifact detected
Measurement removed from display
Module error message displayed
Module malfunction detected
Module not responding to key press
Module unable to find pulse
Multiple ECG modules detected
Multiple Entropy modules connected
Multiple identical NMT modules connected
Multiple identical SpO2 modules connected
NIBP artifacts detected during measurement
NIBP Auto stopped
NIBP calibration failed
NIBP calibration protection mode left active
NIBP control measurement triggered
NIBP cuff ID not automatically detected
NIBP cuff overpressure
NIBP diastolic pressure measurement failed
NIBP incorrect inflation limits
NIBP is out of calibration
NIBP measurement incomplete
NIBP measurement time exceeds limit
NIBP overpressure relief not working
NIBP unable to measure systolic pressure
NIBP unstable zero pressure
NIBP zeroing failed
NMT measurement stopped
NMT module disconnected from monitor
NMT sensor cable disconnected
No BIS waveforms on screen
No C.O. module message
No CCO catheter message
No Entropy sensor detected
No pressure transducer connected
No response to breathing in CO2 measurement
No sensor detected
No SpO2 probe connected
No SpO2 probe message
No VO2 (FiN2O too high) in gas exchange
No VO2 (FiO2 >85%) in gas exchange
Noisy sampling pump operation
Not calibrated message
Over range measured FiO2
Over scale in spirometry (flow/pressure waveform)
Poor signal quality
Pressure channel calibration failed
Pressure channel calibration in progress
Pressure channel not zeroed
Pressure channel standby mode active
Pressure measurement out of range
Pressure measurement under range
Pressure under range condition
Printing spirometry loop
Pulse not detected
Pulse rate alarm SpO2 high or low
Re-calibrate CCO message
Recalibrate SvO2
Reference level setting fails
Reference level setting in progress
Regional block stimulation in progress
Relearning respiration
RF interference detected
Sample line disconnected message displayed
Saving spirometry loop
Scale changed notification in spirometry
Sensor check failed
Sensor expired or validity time unknown
Sensor impedance check fails
Sensor impedance check not available in menus
Sensor is faulty - Service CO2
Sensor warming up
Service CO2 module - multiple failures
Service CO2 sensor - sensor faulty
Service Monitor Error Code 0xHOST1002
Signal artifact detected
Signal contains excess noise or artifact
Spirometry measurements removed
SpO2 high or low NIBP
SpO2 malfunction check device
SpO2 measurement removed
SpO2 module disconnected from bus
SpO2 module disconnected from slot
SpO2 probe LEDs not functioning
SpO2 probe LEDs not operating
SpO2 probe not connected to module
SpO2 probe not connected to patient
SpO2 probe not detected
SpO2 probe off
SpO2 probe off patient
SpO2 probe signal imbalance
Stimulating electrodes disconnected or cable broken
Supramaximal stimulus current not found
Supramaximal stimulus search in progress
SvO2 cable off
SvO2 faulty cable
SvO2 measurement removed
SvO2 not calibrated
SvO2 signal poor
Temperature measurement out of range
Temperature measurement removed
Temperature module calibration in progress
Temperature out of measurable range
Testing DSC in progress
Tetanic stimulation in progress
Top housing damaged
Tubing contamination inside module
Unable to complete NIBP calibration
Visual inspection of EEG module and headbox
Visual inspections
Waveform clipped
Waveform over scale
Wrong cable Nellcor PDM Masimo
Wrong cable NIBP Masimo
Wrong cable use Masimo Set
Wrong cable use Nellcor OxiMax
Zero error - autozeroing failed
Zero error during calibration
Zero recommended
Zero required - measurement needs zeroing
Zeroing in progress

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

Error codes

Code	Meaning	Trigger	Severity
`0xGAS0001`	Service gas module: CO2, N2O and anesthetic agent sensor failed	MiniTPX measuring unit failure detected during sensor initialization or operation	error
`0xGAS0010`	Service gas module: O2 sensor failed	MiniOM oxygen sensor failure detected during sensor initialization or operation	error
`0xGAS0011`	Service gas module: CO2, N2O, AA and O2 sensors failed simultaneously	Simultaneous MiniTPX and MiniOM failure detected during initialization	critical
`0xGAS0100`	Service gas module: spirometry sensor failed	Spirometry measurement unit (MiniPVX) failure detected	error
`0xGAS0101`	Service gas module: CO2, N2O, AA and spirometry sensors failed simultaneously	Simultaneous MiniTPX and MiniPVX failure detected	critical
`0xGAS0110`	Service gas module: O2 and spirometry sensors failed simultaneously	Simultaneous MiniOM and MiniPVX failure detected	critical
`0xGAS0111`	Service gas module: CO2, N2O, AA, O2 and spirometry sensors failed simultaneously	All three sensor units (MiniTPX, MiniOM, MiniPVX) failed concurrently	critical
`0xGAS1000`	Service gas module: general gas measurement failed	Gas measurement system failure not attributable to individual sensors	error
`0xGAS1001`	Service gas module: CO2, N2O, AA sensor and general gas measurement failed	Simultaneous MiniTPX and general measurement system failure	critical
`0xGAS1010`	Service gas module: O2 sensor and general gas measurement failed	Simultaneous MiniOM and general measurement system failure	critical
`0xGAS1011`	Service gas module: CO2, N2O, AA, O2 and general gas measurement failed	Simultaneous MiniTPX, MiniOM and general measurement system failure	critical
`0xGAS1100`	Service gas module: spirometry sensor and general gas measurement failed	Simultaneous MiniPVX and general measurement system failure	critical
`0xGAS1101`	Service gas module: CO2, N2O, AA, spirometry and general gas measurement failed	Simultaneous MiniTPX, MiniPVX and general measurement system failure	critical
`0xGAS1110`	Service gas module: O2, spirometry and general gas measurement failed	Simultaneous MiniOM, MiniPVX and general measurement system failure	critical
`0xGAS1111`	Service gas module: all sensors and general gas measurement failed	Catastrophic module failure affecting all sensors and measurement systems	critical
`Apnea alarm`	Patient respiratory apnea detected	Absence of impedance respiration signal for duration exceeding configured apnea limit (default 3 seconds)	critical
`Apnea deactivated`	Apnea alarm detection not currently active; startup conditions not met	Patient breathing not yet established at module power-up or reconnection	info
`Artifact`	Noise or movement artifact detected in SpO2 signal	Signal quality degradation due to motion or sensor issues	warning
`Artifacts`	Signal contaminated with noise or artifact	EEG waveform contains excessive noise during measurement	warning
`Asystole alarm`	Cardiac asystole detected on ECG	Monitor detects absence of organized cardiac electrical activity (flat-line ECG)	critical
`Automatic check off`	Automatic sensor impedance check is disabled	User turned off automatic check in menu	info
`Cable off`	Entropy sensor cable disconnected	Cable unplugged from module or poor connection	warning
`Calibrated`	Invasive pressure calibration completed successfully	Calibration routine completed without errors	info
`Calibrating`	CO2 sensor calibration procedure in progress	User initiated gas calibration sequence	info
`Calibrating error`	Gas calibration procedure failed to complete successfully	Calibration gas not supplied, incorrect gas used, or excessive gain adjustment detected	error
`Calibrating gas sensor`	Gas sensor warm-up procedure in progress; measurements not available	Module initialization after connection or power-up; sensor requires stabilization	info
`Calibration`	Calibration in progress	Invasive pressure channel calibration initiated and running	info
`Calibration Error`	Gas calibration failed during feed-gas phase or gain adjustment	No calibration gas supplied within 1 minute after zeroing, or gain adjustment too large	error
`Calibration Error`	Invasive pressure calibration process failed during pressure inflation phase	No pressure inflation within 45 seconds after automatic zeroing completion or calibration fails during inflation	error
`Calibration Error`	Calibration procedure failed to complete	Inflation of pressure not started within 45 seconds after automatic zeroing, or calibration fails during the procedure	error
`Calibration failed`	Invasive pressure channel calibration did not complete successfully	Time-out during calibration; pulsating waveform or incorrect gain detected	error
`Check device (SpO2 malfunction)`	SpO2 acquisition module hardware failure	Acquisition module internal failure detected	error
`Checking sensor`	Sensor impedance check in progress	Sensor check initiated (initial, manual, or periodic)	info
`Check probe (SpO2)`	No detectable SpO2 signal or sensor disconnection	SpO2 signal loss or sensor detachment	error
`Check sampling gas out`	Sample gas outflow from module is blocked or pump failure detected	Unable to return sampled gas to patient circuit or scavenger system	warning
`Check water trap`	Water trap not connected or internal tubing has air leak	Condition detected during sampling system operation	warning
`CO cable off`	CO measurement cable disconnected from module	CO measurement cable unplugged from module connector	error
`CO measurement removed`	Cardiac output measurement module disconnected	CO module unplugged or disconnected from monitor	error
`Confirm calibration`	CCO measurement data requires confirmation before exiting calibration menu	User attempts to exit Cardiac Output/CCO Calibrate menu without confirming measurement	warning
`Confirm sensor electrodes`	Multiple electrode contact loss detected	Automatic impedance check detects high impedance on multiple electrodes	warning
`Confirm sensor electrode X`	Single electrode contact loss (electrode 1, 2, or 3)	Automatic impedance check detects high impedance on one electrode	warning
`Demo data`	Entropy simulator detected; demo/test data displayed	Simulator device connected instead of patient sensor	info
`Entropy measurement removed`	Entropy module disconnected from monitor	Module unplugged or lost connection to module slot	warning
`Failure in Agent ID`	Agent ID measurement has failed	Agent ID sensor failure detected	error
`Faulty probe (SpO2)`	SpO2 sensor hardware failure	Sensor self-test or communication failure	error
`Gas calibration is not available during first 5 minutes`	Calibration cannot start immediately after module connection	Attempt to start gas calibration within 5 minutes of module connection	warning
`Gas calibration is not available during gas sampling warning`	Calibration unavailable due to active alarm condition	Sample line blocked, Check Dfend, or Check sample gas out alarm condition active	warning
`Gas measurements removed`	Gas parameter display removed from monitor screen; monitoring no longer active	Module disconnected or measurement channel deactivated by system	warning
`Identical CO modules`	Multiple identical CO modules connected simultaneously	Two or more of E-COP, E-COPSv, E-PiCCO modules connected at same time	error
`Identical Entropy modules`	Multiple Entropy modules connected simultaneously	More than one Entropy module detected on module bus	error
`Identical gas modules`	Monitor detects CO2 measurements from multiple identical modules; ambiguity in measurement source	Two or more identical CO2 modules connected to monitor providing duplicate measurements	warning
`Identical IP5 modules`	Two or more modules providing the same IP5 (invasive pressure channel 5) detected	Monitor detects identical IP5 channel from multiple modules during initialization	warning
`Identical IP6 modules`	Two or more modules providing the same IP6 (invasive pressure channel 6) detected	Monitor detects identical IP6 channel from multiple modules during initialization	warning
`Identical IP7 modules`	Two or more modules providing the same IP7 (invasive pressure channel 7) detected	Monitor detects identical IP7 channel from multiple modules during initialization	warning
`Identical IP8 modules`	Multiple identical invasive pressure modules detected	Two or more E-PiCCO or E-COPSv modules providing same IP channel connected simultaneously	error
`Identical SpO2(2) modules`	Multiple identical SpO2 modules in system	Two or more identical SpO2 modules connected	error
`Identical SpO2(2) sources`	Multiple SpO2 measurement sources active simultaneously	E-module and UNID SpO2 sources detected at same time	error
`Incompatible gas module`	Gas module detected as incompatible with current monitor system	Monitor firmware recognizes module type as incompatible with installed software version	error
`Incompatible probe (SpO2)`	SpO2 sensor not compatible with module	Wrong sensor type installed for module variant	error
`Isoelectric EEG`	Flatline EEG detected during Entropy measurement	No EEG signal detected (isoelectric condition)	critical
`Low gas sample flow`	Sample flow rate below 80% of module nominal specified value	Sampling system flow measurement indicates reduced flow during operation	warning
`Low perfusion`	Insufficient blood flow at SpO2 measurement site	Weak or absent pulsatile perfusion detected	warning
`Low signal`	EEG amplitude too low for reliable measurement	EEG signal amplitude below minimum threshold	warning
`Low signal`	SpO2 signal quality questionable	Signal strength below quality threshold	warning
`Low signal quality`	SpO2 signal quality degraded	Signal quality metrics below acceptable level	warning
`NIBP Auto stopped`	NIBP automatic measurement stopped unexpectedly	Loose cuff or hose connection detected during measurement	warning
`No CCO catheter`	CCO catheter or cable disconnected from system	Catheter disconnects from cable or cable disconnects from module	error
`Noise`	Unreliable Entropy calculation; distorted waveform from HF interference	Electrosurgery or high-frequency noise during measurement	warning
`No module (C.O.)`	No cardiac output module connected	CCO module not connected when C.O. measurement attempted	error
`No P5 transducer`	Pressure transducer P5 not detected or not connected	Pressure transducer and/or transducer adapter cable disconnected from module	warning
`No P6 transducer`	Pressure transducer P6 not detected or not connected	Pressure transducer and/or transducer adapter cable disconnected from module	warning
`No P7 transducer`	Pressure transducer P7 not detected or not connected	Pressure transducer and/or transducer adapter cable disconnected from module	warning
`No P8 transducer`	Pressure transducer disconnected	Transducer or adapter cable disconnected from module	error
`No probe (SpO2)`	SpO2 sensor not connected to module	Sensor connector not detected by acquisition module	error
`No sensor`	No Entropy sensor detected	Cable connected but sensor not attached to cable	warning
`Not calibrated`	CCO measurement not calibrated	Module and cable connected but calibration not performed	warning
`Not Entropy sensor`	Incompatible or simulator device connected	Non-Entropy device detected at sensor port	error
`Not zeroed`	Invasive pressure channel not zeroed	At least one invasive pressure channel requires zeroing before measurements	warning
`Over range`	Measured FiO2 exceeds valid range	FiO2 measurement exceeds 103%	warning
`Over Scale`	Displayed CO2 waveform clipped; ETCO2 value exceeds upper limit of current display scale	Measured ETCO2 exceeds maximum value displayable on selected scale	warning
`P8 over range`	Measured pressure exceeds upper limit (>320 mmHg / >43 kPa)	Measured pressure value exceeds maximum range	error
`P8 under range`	Measured pressure below lower limit (<-40 mmHg / <-5 kPa)	Measured pressure value below minimum range	error
`Pressure measurement removed`	Invasive pressure module has been disconnected from monitor	Module physically disconnected or communication lost with pressure module	info
`Probe off (SpO2)`	SpO2 sensor not functioning or not on patient	Sensor inactive or disconnected from patient	error
`PR(SpO2) high / PR(SpO2) low`	Pulse rate measurement outside alarm limits	Measured pulse rate equals or exceeds configured alarm thresholds	warning
`Pulse search (NIBP)`	NIBP measurement initializing or pulse detection in progress	NIBP measurement cycle starting or prolonged pulse detection	info
`RA/R Lead off`	Right arm or right leg ECG lead disconnected or failed	Loss of signal from RA/R lead wire contact	warning
`Re-calibrate CCO`	CCO calibration expired or requires refresh	More than 8 hours elapsed since last calibration	warning
`Recalibrate SvO2`	SvO2 calibration older than 24 hours	Elapsed time since last calibration exceeds 24 hours	warning
`Replace D-Fend`	Water trap filter exhausted, saturated with condensate, or contaminated	Water trap monitoring indicates saturation or contamination detected	warning
`Replace water trap`	D-fend Pro water trap requires replacement or internal tubing occluded	Defective water trap detected or internal occlusion	warning
`Sample line blocked`	Continuous blockage detected in gas sampling line, water trap, or internal tubing	Obstruction detected in sampling gas delivery path	warning
`Sensor check failed`	Sensor impedance exceeds acceptable threshold	Electrode impedance measurement exceeds limit during check	error
`Sensor expired`	Entropy sensor exceeded usable lifespan	Sensor used > 24 hours or past expiration date	warning
`Sensor INOP`	Gas sensor inoperative or not responding to gas measurements	Module unable to establish communication with sensor or sensor failure detected	error
`Sensor off`	Sensor cable connected but not attached to patient	Sensor not placed on patient skin	warning
`SpO2 high / SpO2 low (NIBP)`	SpO2 measurement outside alarm limits during NIBP measurement	SpO2 reading equals or exceeds alarm thresholds	warning
`SpO2 measurement removed`	SpO2 acquisition module disconnected from system	Module connection lost or removed	error
`Starting up`	Entropy measurement initialization in progress	Sensor check passed; measurement starting	info
`SvO2 cable off`	SvO2 measurement cable disconnected	SvO2 cable unplugged from module connector	error
`SvO2 faulty cable`	Optical module factory calibration corrupted or transmitter error	Red/infrared transmitter malfunction during operation	error
`SvO2 measurement removed`	SvO2 module disconnected	SvO2 module unplugged or disconnected from monitor	error
`SvO2 not calibrated`	SvO2 catheter not calibrated after module connection	Optical module connected without catheter calibration	warning
`SvO2 signal poor`	SvO2 signal quality degraded or pulsation detected	Signal pulsation or intensity shift in signal quality	warning
`Temperature measurement removed`	Temperature module has been disconnected from monitor	Module physically disconnected or communication lost with temperature module	info
`Tx temperature error`	Temperature channel calibration or hardware failure detected	Automatic self-check detects calibration failure or hardware fault on temperature channel	error
`Wrong cable (NIBP/Masimo)`	Incorrect cable type connected to module	Nellcor cable connected to Masimo PDM or vice versa	error
`Wrong cable. Use Masimo Set`	Nellcor cable installed on Masimo PDM	Nellcor OxiMax cable detected connected to Masimo module	error
`Wrong cable. Use Nellcor OxiMax`	Masimo cable installed on Nellcor PDM	Masimo Set cable detected connected to Nellcor module	error
`Zero adj > 100 mmHg`	Pressure zeroing offset exceeds 100 mmHg but less than 150 mmHg	Zeroing procedure detects offset > 100 mmHg from absolute zero of module with default gain	warning
`Zeroed`	Invasive pressure zeroing completed successfully	Zeroing procedure completed without errors	info
`Zero Error`	Automatic zeroing of gas sensor failed	During automatic zeroing phase of gas calibration	error
`Zero error`	Autozeroing failed during measurement start or gas calibration initiation	Zero valve malfunction or blockage preventing baseline zeroing	error
`Zero Failure`	Automatic zeroing of invasive pressure channel failed	During automatic zeroing step of invasive pressure calibration	warning
`Zero ICP separately`	ICP channel requires separate zeroing	Zero All command executed while ICP is active IP channel	warning
`Zeroing`	CO2 sensor autozeroing procedure in progress	System performing baseline zeroing before measurement or calibration	info
`Zeroing failed`	Invasive pressure channel zeroing procedure did not complete successfully	Pulsating waveform detected; offset exceeds 150 mmHg during zeroing	error

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.