Ventilators · CARESCAPE family

GE Healthcare CARESCAPE R860: troubleshooting and error codes

The ServiceForge knowledge base holds 206 documented symptoms for the GE Healthcare CARESCAPE R860, with 426 ranked causes, 300 diagnostic checks with test points and expected values, and 326 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

System Check fails

One or more automated checks display red X instead of green check mark during System Check procedure on power up or after use

Ranked causes

1. Paw transducer check failure (unknown)
2. Barometric pressure check failure (unknown)
3. Relief valve check failure (unknown)
4. Exhalation valve check failure (unknown)
5. Expiratory flow sensor check failure (unknown)
6. Air flow sensor check failure (unknown)
7. Oxygen sensor check failure (unknown)
8. O2 flow sensor check failure (unknown)
9. Neonatal Flow Sensor check failure (unknown)
10. Resistance check failure (unknown)
11. Circuit measurements check failure (unknown)

First check

Select New Patient from Standby menu

Test point: Standby menu
Expected: Confirm or select Previous Patient

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

System Check with O2 Therapy (Dual limb) fails

One or more checks display red X instead of green check mark during dual limb System Check procedure with O2 therapy option enabled

Ranked causes

1. Paw transducer check failure (unknown)
2. Barometric pressure check failure (unknown)
3. Relief valve check failure (unknown)
4. Exhalation valve check failure with calibration (unknown)
5. Expiratory flow sensor check failure (unknown)
6. Air flow sensor check failure (unknown)
7. Oxygen sensor check failure (unknown)
8. O2 flow sensor check failure (unknown)
9. Neonatal Flow Sensor check failure (unknown)
10. Resistance check failure (unknown)
11. Circuit measurements check failure (unknown)

First check

Select New Patient from Standby menu

Test point: Standby menu
Expected: Confirm or select Previous Patient

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

Exhalation valve calibration cannot achieve 80 cmH2O pressure

Exhalation valve calibration fails to generate 80 cmH2O pressure in the breathing circuit

Ranked causes

1. Insufficient flow from flow control valve (common)
2. Breathing circuit disconnected or leaking (common)
3. Low pressure vent engine system leaking (common)
4. Exhalation housing seat/seal contaminated or damaged (common)
5. No power to exhalation valve actuator (occasional)
6. Harness failure or poor connection (occasional)
7. VCB (valve control board) failure (rare)

First check

Measure flow from flow control valve

Test point: FCV outlet
Expected: At least 1 l/min

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

Vent engine leak test fails patient safety

Unable to build 70 cmH2O pressure or leak rate exceeds 10 ml/min during low pressure vent engine leak test

Ranked causes

1. Air and O2 flow path leaks or blockages (common)
2. Effort Valve leak (common)
3. Free Breathing Valve diaphragm or o-ring seal failure (occasional)
4. Safety valve seal failure (occasional)
5. Individual Total Flow path component leaks (occasional)
6. O2 Flow path component leaks (occasional)
7. Air Flow path component leaks (occasional)

First check

Close Air and O2 flow valves and remove DAC count checkmarks

Test point: Air and O2 flow valve controls
Expected: Valves closed, DAC count boxes unchecked

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

Cannot achieve 40 cmH2O pressure during exhalation valve calibration

Calibration running field displays 'Can't Achieve 40 cmH2O' message; exhalation valve check cannot generate required pressure

Ranked causes

1. Flow control valve (FCV) flow insufficient (occasional)
2. Breathing circuit disconnected or leaking (common)
3. Exhalation housing seat or seal dirty or damaged (occasional)
4. No power to exhalation valve actuator (rare)
5. Harness defective or disconnected (occasional)
6. Ventilation Control Board (VCB) failure (rare)

First check

Verify FCV flow during calibration

Test point: FCV output
Expected: Flow greater than 1 l/min

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

O2 and air flow disagree

O2 sensor check failed; difference between O2 sensor and calculated O2% from flow measurement exceeds 5% O2

Ranked causes

1. Air pressure regulator leak (occasional)
2. O2 pressure regulator leak (occasional)
3. Air flow sensor malfunction (occasional)
4. O2 flow sensor malfunction (occasional)
5. Total flow sensor malfunction (occasional)
6. O2 sensor malfunction (occasional)

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

Unit fails to boot with green LED on

Display unit will not boot; green power LED is illuminated

Ranked causes

1. Lithium coin cell at J17 not properly installed (common)
2. Defective lithium coin cell at J17 (common)
3. Internal Flash card at J10 not properly seated (occasional)
4. Defective Compact Flash card (occasional)
5. External Compact Flash card issue (occasional)
6. Failed display unit main PCB (rare)

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

Exhalation valve calibration check fails

Checkout test fails during exhalation valve calibration; system sets flow at 4 l/min and pressure at 34 cmH2O, then opens valve and verifies expiratory pressure drops below 2 cmH2O within 250 ms. All ventilation modes remain available.

Ranked causes

1. Total flow too low or too high (common)
2. Significant leak in system (occasional)
3. Pexp sensor not returning to zero (occasional)
4. Exhalation valve out of calibration (occasional)
5. Exhalation flow sensor not detected (rare)

First check

Verify supply gas connection and flow capability

Test point: System output at 10 l/min calibration point
Expected: At least 4 l/min

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

Safety relief valve cannot relieve pressure (single limb system) patient safety

Single limb system Safety Relief Valve test failure. Cannot achieve 2 cmH2O inspiratory pressure with 80 l/min flow, or valve cannot drop pressure >0.75 cmH2O within 250 msec, or inspiratory back pressure exceeds 1 cmH2O minimum.

Ranked causes

1. Inspiratory Safety Guard (ISG) not installed (common)
2. Insufficient supply gas or regulator/valve malfunction (common)
3. System leak (occasional)
4. Safety relief valve defective or stuck closed (occasional)
5. Manifold or inspiratory valve assembly malfunction (rare)

First check

Verify Inspiratory Safety Guard (ISG) is installed

Test point: Single limb system inlet
Expected: ISG present and secure

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

Unable to build expiratory or auxiliary pressure patient safety

Able to build 70 cmH2O inspiratory pressure but unable to build 70 cmH2O of either expiratory pressure or auxiliary pressure despite marginal leak rate

Ranked causes

1. Exhalation valve or expiratory pressure circuit issue (common)
2. Exhalation Valve Assembly pressure port seal failure (occasional)
3. Restrictor blockage or excessive restriction (occasional)
4. Restrictor gasket, zero valve gasket, or sensor o-ring failure (occasional)
5. Expiratory pressure sensor assembly or manifold failure (rare)

First check

Verify air shut-off valve is open and supply available

Test point: Air shut-off valve
Expected: Valve open and supply available

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

Cannot achieve 2 cmH2O inspiratory pressure (single limb system)

Single limb system Paw transducer check failure. Air/O2 flow set to approximately 4 l/min, increased until 2 cmH2O inspiratory pressure achieved. If 1 cmH2O cannot be achieved with up to 60 l/min, test fails.

Ranked causes

1. Inspiratory Safety Guard (ISG) not installed (common)
2. Supply gas not connected or insufficient pressure (common)
3. Internal leak in system (occasional)
4. Regulator or Flow Control Valve malfunction (occasional)

First check

Verify Inspiratory Safety Guard (ISG) is installed

Test point: Single limb system inlet
Expected: ISG present and secure

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

Cannot achieve 34 cmH2O pressure

Pressure too low or total flow too low during Paw transducer check. Air/O2 flow valve set to approximately 8 l/min. If 33 cmH2O pressure cannot be achieved, test fails without alarm.

Ranked causes

1. Supply gas not connected or low pressure (common)
2. Internal leak in system (occasional)
3. Flow valve calibration drift (occasional)
4. Regulator or Flow Control Valve malfunction (occasional)

First check

Verify supply gas is connected

Test point: Gas inlet
Expected: Supply gas present

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

Cannot establish pressure (insufficient flow)

During checkout step, unable to achieve 8 Lpm flow required to attempt reaching 34 cmH2O pressure

Ranked causes

1. Breathing circuit disconnected or leaking (common)
2. Low pressure vent engine system leaking (common)
3. Exhalation valve improperly connected or seals missing (common)
4. Inadequate gas flow from flow control valves (occasional)

First check

Measure flow from system during checkout

Test point: System flow output
Expected: Achieve 8 Lpm

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

Cannot pressurize breathing circuit to 33 cmH2O (Paw transducer check)

During Paw transducer check, breathing circuit cannot reach 33 cmH2O pressure

Ranked causes

1. Breathing circuit disconnected or leaking (common)
2. Low pressure vent engine system leaking (common)
3. Exhalation valve improperly connected or seals missing (common)
4. Inadequate gas flow from flow control valves (occasional)

First check

Verify breathing circuit connection and integrity

Test point: All circuit connections and tubing
Expected: Connected, sealed, and leak-free

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

Display unit will not power on high voltage

Display unit fails to power up; no LED indication or system response

Ranked causes

1. Mains power not connected (common)
2. Power inlet problem (occasional)
3. On/Standby switch signal failure (occasional)
4. Power Controller Board failure (rare)

First check

Verify +12V Green LED illuminated at back of display behind cable cover

Test point: Back of display unit
Expected: Green LED illuminated

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

Excessive fan noise caution

Display unit fan is making excessive noise

Ranked causes

1. Display case fan inlet filter clogged or dirty (common)
2. Obstruction in case fan (common)
3. Com Express fan noise (occasional)
4. Failed fan assembly (occasional)

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

Excessive leak in breathing circuit

Leak value measured by checkout exceeds 0.5 Lpm, causing expiratory flow sensor normalization to be disabled

Ranked causes

1. Breathing circuit disconnected or leaking (common)
2. Low pressure vent engine leaking (common)
3. Exhalation valve improperly connected or seals missing (common)
4. Inadequate gas flow from flow control valves (occasional)

First check

Measure leak rate during checkout

Test point: Breathing circuit and vent engine
Expected: Leak less than 0.5 Lpm

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

Exhalation flow sensor pressure stabilization timeout

During exhalation valve calibration check, expiratory pressure does not stabilize within 0.1 cmH2O within 12 seconds

Ranked causes

1. Breathing circuit disconnected or leaking (common)
2. Low pressure vent engine system leaking (common)
3. Exhalation valve improperly connected or seals missing (common)
4. Inadequate gas flow from flow control valves (occasional)

First check

Monitor pressure stabilization time

Test point: Breathing circuit pressure
Expected: Stabilize within 0.1 cmH2O within 12 seconds

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

Guaranteed flow not achieved

Cannot bring flow down to target flow with minimum flow command during checkout

Ranked causes

1. Breathing circuit disconnected or leaking (common)
2. Low pressure vent engine leaking (occasional)
3. Exhalation valve not properly connected or seals missing (common)
4. Flow control valve malfunction (occasional)

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

Insufficient flow during checkout step patient safety

Could not achieve minimum flow required for a checkout step

Ranked causes

1. Breathing circuit disconnected or leaking (common)
2. Low pressure vent engine leaking (common)
3. Exhalation valve improperly connected or unsealed (common)
4. Flow control valve malfunction or incorrect calibration (occasional)

First check

Verify breathing circuit connected and not leaking

Test point: Breathing circuit connections
Expected: All connections tight, no leaks

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

Low pressure leak check pressure inadequate (first half)

During first half of low pressure leak check, breathing circuit could not reach 34 cmH2O

Ranked causes

1. Breathing circuit disconnected or leaking (common)
2. Low pressure vent engine system leaking (common)
3. Exhalation valve improperly connected or seals missing (common)
4. Inadequate gas flow from flow control valves (occasional)

First check

Monitor breathing circuit pressure during first half of leak check

Test point: Breathing circuit pressure
Expected: Reach 34 cmH2O

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

Low pressure leak check pressure inadequate (second half)

During second half of low pressure leak check, breathing circuit could not reach 25 cmH2O

Ranked causes

1. Breathing circuit disconnected or leaking (common)
2. Low pressure vent engine system leaking (common)
3. Exhalation valve improperly connected or seals missing (common)
4. Inadequate gas flow from flow control valves (occasional)

First check

Monitor breathing circuit pressure during second half of leak check

Test point: Breathing circuit pressure
Expected: Reach 25 cmH2O

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

Minimum flow not achieved

Could not achieve minimum flow required for checkout step

Ranked causes

1. Breathing circuit disconnected or leaking (common)
2. Low pressure vent engine leaking (occasional)
3. Exhalation valve not properly connected or seals missing (common)
4. Flow control valve malfunction (occasional)

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

Neonatal checkout failed at 20 Lpm

System was unable to achieve 20 Lpm of flow during neonatal checkout

Ranked causes

1. Breathing circuit disconnected or leaking (common)
2. Low pressure vent engine leaking (occasional)
3. Exhalation valve not properly connected or seals missing (common)
4. Flow control valve malfunction (occasional)

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

Neonatal checkout failed at 30 Lpm

System was unable to achieve 30 Lpm of flow during neonatal checkout

Ranked causes

1. Breathing circuit disconnected or leaking (common)
2. Low pressure vent engine leaking (occasional)
3. Exhalation valve not properly connected or seals missing (common)
4. Flow control valve malfunction (occasional)

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

Neonatal zero check failed at 4 Lpm

Neonatal flow sensor zero check failed because system unable to achieve 4 Lpm

Ranked causes

1. Breathing circuit disconnected or leaking (common)
2. Low pressure vent engine leaking (occasional)
3. Exhalation valve not properly connected or seals missing (common)
4. Flow control valve malfunction (occasional)

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

Normalized flow comparison failed

Normalized expiratory flow and total flow are more than 10% (or 200 ml) apart

Ranked causes

1. Breathing circuit disconnected or leaking (common)
2. Low pressure vent engine leaking (occasional)
3. Exhalation valve not properly connected or seals missing (common)
4. Flow control valve malfunction (occasional)

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

Oxygen flow sensor check failed - insufficient flow patient safety

System unable to achieve 30 Lpm during oxygen flow sensor check

Ranked causes

1. Breathing circuit disconnected or leaking (common)
2. Low pressure vent engine leaking (common)
3. Exhalation valve improperly connected or unsealed (common)
4. Flow control valve malfunction or incorrect calibration (occasional)

First check

Verify breathing circuit connected and not leaking

Test point: Breathing circuit connections
Expected: All connections tight, no leaks

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

Paracube check failed - insufficient airflow for 50/50 air mix patient safety

Failed to achieve 15 Lpm airflow during 50/50 calibration

Ranked causes

1. Breathing circuit disconnected or leaking (common)
2. Low pressure vent engine leaking (common)
3. Exhalation valve improperly connected or unsealed (common)
4. Flow control valve malfunction or incorrect calibration (occasional)

First check

Verify breathing circuit connected and not leaking

Test point: Breathing circuit connections
Expected: All connections tight, no leaks

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

Paracube check failed - insufficient airflow for 50/50 O2 mix patient safety

Failed to achieve 15 Lpm oxygen flow during 50/50 calibration

Ranked causes

1. Breathing circuit disconnected or leaking (common)
2. Low pressure vent engine leaking (common)
3. Exhalation valve improperly connected or unsealed (common)
4. Flow control valve malfunction or incorrect calibration (occasional)

First check

Verify breathing circuit connected and not leaking

Test point: Breathing circuit connections
Expected: All connections tight, no leaks

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

Paracube check failed - insufficient oxygen flow patient safety

Failed to achieve 30 Lpm oxygen flow during O2 calibration

Ranked causes

1. Breathing circuit disconnected or leaking (common)
2. Low pressure vent engine leaking (common)
3. Exhalation valve improperly connected or unsealed (common)
4. Flow control valve malfunction or incorrect calibration (occasional)

First check

Verify breathing circuit connected and not leaking

Test point: Breathing circuit connections
Expected: All connections tight, no leaks

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

Safety relief valve cannot relieve pressure (dual limb system) patient safety

Safety Relief Valve test failure during dual limb system check. Cannot relieve 30 cmH2O within 250 msec or back pressure with 75 l/min flow exceeds 15 cmH2O. Ventilation not allowed.

Ranked causes

1. Insufficient supply gas pressure or flow (common)
2. Relief valve opened during compliance check; exhalation diaphragm fault (occasional)
3. Regulator or Flow Control Valve malfunction (occasional)
4. Internal leak in system (occasional)

First check

Ensure supply gas is connected and set Air/O2 flow to 8 l/min

Test point: Gas inlet and flow setting
Expected: Supply gas present; 8 l/min flow established

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

System unable to maintain minimum pressure during relief valve check patient safety

System pressure dropped below 25 cmH2O during relief valve check

Ranked causes

1. Breathing circuit disconnected or leaking (common)
2. Low pressure vent engine leaking (common)
3. Exhalation valve improperly connected or unsealed (common)
4. Flow control valve malfunction or incorrect calibration (occasional)

First check

Verify breathing circuit connected and not leaking

Test point: Breathing circuit connections
Expected: All connections tight, no leaks

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

System unable to pressurize circuit to 10 cmH2O patient safety

Circuit could not be pressurized to minimum 10 cmH2O pressure

Ranked causes

1. Breathing circuit disconnected or leaking (common)
2. Low pressure vent engine leaking (common)
3. Exhalation valve improperly connected or unsealed (common)
4. Flow control valve malfunction or incorrect calibration (occasional)

First check

Verify breathing circuit connected and not leaking

Test point: Breathing circuit connections
Expected: All connections tight, no leaks

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

Target flow not reached at minimum flow command patient safety

Flow remains greater than target flow with minimum command during checkout

Ranked causes

1. Breathing circuit disconnected or leaking (common)
2. Low pressure vent engine leaking (common)
3. Exhalation valve improperly connected or unsealed (common)
4. Flow control valve malfunction or incorrect calibration (occasional)

First check

Verify breathing circuit connected and not leaking

Test point: Breathing circuit connections
Expected: All connections tight, no leaks

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

Touchscreen fails to work patient safety

Touchscreen is not responding to touch input or non-functional

Ranked causes

1. Screen lock is enabled (common)
2. Internal cable or connection failure (occasional)
3. Failed Touch Controller Board (occasional)
4. Failed Touch Bezel Assembly (rare)

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

Auxiliary pressure sensor zero out of range

Auxiliary pressure sensor zero DAC is outside normal range (631 to 968)

Ranked causes

1. Paux port blocked or not open to atmosphere (common)
2. Zero valve failure (occasional)
3. Pressure transducer failure (occasional)

First check

Verify Paux port is open to atmosphere

Test point: Paux port
Expected: Open to atmosphere directly or via open tube

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

Barometric pressure calculation and measurement disagree

Measured barometric pressure differs from calculated pressure based on user-set altitude by more than 20%. If check fails, all ventilation modes remain available using altitude-based calculation.

Ranked causes

1. Incorrect altitude setting (common)
2. Barometric sensor calibration drift (occasional)
3. Vent Monitor board (VMB) failure (rare)

First check

Verify altitude setting matches actual location

Test point: System configuration
Expected: Altitude setting correct for installation location

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

Battery Status abnormal

Battery Status shows Fail, Over Chg, or other non-float condition unexpectedly

Ranked causes

1. Battery charging circuit failure or degradation (occasional)
2. Battery disconnected and in Trickle mode >12 hours (occasional)
3. Severely degraded battery (occasional)

First check

Check Battery Status field in Power Diagnostics

Test point: Power Controller Readings Page 1, Battery Status
Expected: Float Chg (normal operation) or Discharge (on battery power)

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

Board Temperature out of range caution

Power Controller board temperature excessive on Power Diagnostics Page 2

Ranked causes

1. Cooling fan failure or malfunction (common)
2. Blocked or restricted airflow (occasional)
3. Excessive system load or ambient temperature (occasional)

First check

Monitor Board Temperature in Power Diagnostics

Test point: Power Controller Readings Page 2, Board Temperature field
Expected: <65C (green), <65

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

Exhalation flow sensor calibration test fails

Exhalation Flow Sensor output differs from Total Flow Sensor output by more than 20% at 10 l/min. All ventilator functions remain available; Expiratory Flow Sensor Error message may display.

Ranked causes

1. Exhalation flow sensor not installed or faulty (common)
2. Inspiratory and expiratory flows do not match (common)
3. Leak too large for normalization (occasional)

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

Exhalation valve calibration pressure too low at high point

100 cmH2O calibration point reads greater than 65000 counts; test fails with no alarm displayed.

Ranked causes

1. FCV not generating sufficient flow (common)
2. Exhalation valve shaft binding or dirty (occasional)
3. Faulty exhalation valve or voice coil (occasional)

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

Exhalation valve calibration slope too steep

Difference between 30 and 40 cmH2O calibration points greater than 6500 counts; test fails with no alarm displayed.

Ranked causes

1. FCV not generating sufficient flow (common)
2. Exhalation valve shaft binding or dirty (occasional)
3. Faulty exhalation valve or voice coil (occasional)

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

Expiratory pressure sensor zero out of range

Expiratory Pressure Sensor Zero Failure during Paw transducer check. Raw counts from Expiratory Pressure Sensor must be between 631 and 968 counts when Zero valve is actuated; otherwise test fails.

Ranked causes

1. Expiratory Pressure Zero valve defective (common)
2. Expiratory Pressure Sensor Board malfunction (occasional)
3. Vent Monitor board (VMB) failure (rare)

First check

Verify Expiratory Pressure Sensor raw counts with Zero valve actuated

Test point: Expiratory Pressure Sensor
Expected: 631 to 968 counts

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

Flow sensors disagree during FCV calibration patient safety

Air or O2 flow sensor differs from total flow sensor by >20% or >1500 ml/min

Ranked causes

1. Regulator oscillation or instability (common)
2. Individual flow sensor defective (common)
3. Total flow sensor defective (occasional)

First check

Check gas regulator for oscillation

Test point: Regulator pressure output
Expected: Stable pressure without oscillation

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

Gas sampling system leak detected

Pressure drops excessively during leak test, indicating possible disconnection or damage to gas sampling tubing or connectors.

Ranked causes

1. Loose or disconnected tubing connections (common)
2. Damaged or worn tubing (occasional)
3. Water trap seal failure (occasional)

First check

Perform gas sampling leak test on E-series module

Test point: Gas sampling system
Expected: Pressure drop not more than 4 mmHg during one minute, ≤4 mmHg per minute
Tools: Pressure manometer (±1% accuracy at 25 PSI), pressure pump

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

High pressure air leak test failed due to barometric pressure

Vent engine high air pressure leak test failed because of invalid (low) barometric pressure reading

Ranked causes

1. Incorrect altitude setting (common)
2. Barometric sensor malfunction (occasional)
3. Vent Monitor Board malfunction (rare)

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

High pressure O2 leak test failed due to barometric pressure

Vent engine high O2 pressure leak test failed because of invalid (low) barometric pressure reading

Ranked causes

1. Incorrect altitude setting (common)
2. Barometric sensor malfunction (occasional)
3. Vent Monitor Board malfunction (rare)

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

Inspiratory Paw transducer check failed - low pressure

Single Limb Paw Transducer check failed; inspiratory pressure could not reach 1 cmH2O

Ranked causes

1. Inspiratory Safety Guard (ISG) not connected or leaking (common)
2. Low pressure vent engine system leaking (occasional)
3. Insufficient gas flow from flow control valves (occasional)

First check

Verify Inspiratory Safety Guard connection and integrity

Test point: ISG connector and seals
Expected: ISG connected and no visible leaks

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

Inspiratory Paw zero valve fails to generate minimum pressure (single limb system)

Inspiratory pressure transducer zero valve closed while constant flow provided. Check for minimum 1 cmH2O pressure. If pressure does not achieve minimum, test fails.

Ranked causes

1. Inspiratory Pressure Zero valve defective (common)
2. Inspiratory Pressure Sensor Board malfunction (occasional)
3. Vent Control board (VCB) failure (rare)

First check

Close inspiratory zero valve and provide constant flow

Test point: Pinsp sensor
Expected: Minimum 1 cmH2O, Minimum

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

Inspiratory Paw zero valve fails to open (single limb system)

After establishing pressure, inspiratory pressure transducer zero valve is opened to atmosphere and checked for zero cmH2O ±0.5 cmH2O. If pressure is out of range, test fails.

Ranked causes

1. Inspiratory Pressure Zero valve defective or stuck (common)
2. Inspiratory Pressure Sensor Board malfunction (occasional)
3. Vent Control board (VCB) failure (rare)

First check

Establish pressure then open inspiratory zero valve to atmosphere

Test point: Pinsp sensor
Expected: Zero cmH2O ±0.5 cmH2O, ±0.5

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

Inspiratory pressure sensor zero out of range

Inspiratory Pressure Sensor Zero Failure during Paw transducer check. Raw counts from Inspiratory Pressure Sensor must be between 631 and 968 counts when Zero valve is actuated; otherwise test fails.

Ranked causes

1. Inspiratory Pressure Zero valve defective (common)
2. Inspiratory Pressure Sensor Board malfunction (occasional)
3. Vent Control board (VCB) failure (rare)

First check

Verify Inspiratory Pressure Sensor raw counts with Zero valve actuated

Test point: Inspiratory Pressure Sensor
Expected: 631 to 968 counts

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

Low pressure leak test failed due to barometric pressure

Vent engine low pressure leak test failed because of invalid (low) barometric pressure reading

Ranked causes

1. Incorrect altitude setting (common)
2. Barometric sensor malfunction (occasional)
3. Vent Monitor Board malfunction (rare)

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

O2 flow sensor differs from total flow sensor patient safety

O2 flow sensor differs >15% from total flow sensor at 30 L/min nominal flow

Ranked causes

1. Gas regulator oscillating or unstable (common)
2. O2 flow sensor defective (common)
3. Total flow sensor defective (occasional)

First check

Check oxygen regulator for oscillation

Test point: O2 regulator pressure output
Expected: Stable pressure, no oscillation

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

O2 measurement too low for 100% calibration patient safety

Measured O2 concentration below 41% during 100% span calibration

Ranked causes

1. Gas supply not properly connected (common)
2. Paracube sensor out of calibration range (occasional)
3. Paracube sensor defective (occasional)

First check

Verify gas supply connections

Test point: O2 inlet connection
Expected: Firmly connected

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

O2 measurement too low for 21% calibration patient safety

Measured O2 concentration below 8% during 21% calibration

Ranked causes

1. Gas supply not properly connected (common)
2. Paracube sensor out of calibration range (occasional)
3. Paracube sensor defective (occasional)

First check

Verify gas supply connections

Test point: Air/O2 inlet connections
Expected: Firmly connected, no leaks

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

Pressure not maintained at calibration points

During calibration at 30, 20, 10, 7.5, 5, 2.5, and 1.25 cmH2O, pressure drops more than 1.25 cmH2O during a calibration point; test fails with no alarm displayed.

Ranked causes

1. FCV not generating sufficient flow (common)
2. Exhalation valve shaft binding or dirty (occasional)
3. Faulty exhalation valve or voice coil (occasional)

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

Pressure too low in exhalation valve calibration

Exhalation valve cannot close to achieve 40 cmH2O when 4 l/min flow is present; test fails with no alarm displayed.

Ranked causes

1. FCV not generating sufficient flow (common)
2. Exhalation valve shaft binding or dirty (occasional)
3. Faulty exhalation valve or voice coil assembly (occasional)

First check

Verify FCV generates required flow

Test point: FCV output via PC Service Application
Expected: At least 4 l/min

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

Rotary encoder fails to work

Rotary encoder is not responding or operational

Ranked causes

1. Rotary encoder cable not properly seated (common)
2. Failed rotary encoder (occasional)
3. Failed Carrier Board or Com Express Board Assembly (rare)

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

System will not boot from USB media during software installation

Ventilator display unit fails to boot from USB media during software installation process

Ranked causes

1. Incorrect or improperly inserted USB media (common)
2. Defective backup USB media (occasional)
3. Failed Carrier Board or Com Express Board Assembly (rare)

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

More symptoms

'App Not Loaded' message is displayed
Air flow sensor temperature disagreement
Air inspiratory flow sensor calibration fails
Airway Module Gas Data unavailable
Battery 1 voltage out of range
Battery 2 voltage out of range
Battery not connected
Breathing circuit resistance measurement fails
D-fend water trap disconnection or failure
Exhalation flow sensor fails checkout
Exhalation valve cannot open sufficiently
Expiratory flow sensor calibration failed
Fall time measurements out of specification
Flow valve calibration point extrapolation failed (190 ml/min)
Flow valve DAC too low
Flow Valve excessive flow or stuck open
High pressure checkout aborted
Inspiratory flow below target
Low pressure excessive drop (exhalation valve calibration)
Low pressure leak and compliance check fails
Neonatal flow sensor calibration failed
Neonatal zero check failed with non-zero flow
No expiratory flow sensor detected
O2 inspiratory flow sensor calibration fails
O2 sensor test and calibration fails
Paw inspiratory and expiratory pressures disagree
Pressure too high in exhalation valve calibration
Sample flow rate out of specification
Sample line occluded alarm
Spirometry system leak detected
Spirometry volume reading error
System power does not turn on
Total flow sensor reading disagrees with neonatal flow
Total resistance invalid during inspiratory limb resistance check
Zero valve not responding to command
1.5 Vdc supply voltage out of range
12 Vdc supply voltage out of range
3.3 Vdc supply voltage out of range
AC Status failure
Air flow sensor disagrees with total flow sensor reading
Airway module CO2 and O2 measurements inaccurate
Airway module communication failure
Airway pressure transducer check failed - sensors not zeroed
Airway pressure transducer inspiratory/expiratory difference exceeds tolerance
Alarm speaker not detected
Ambient pressure sensor reading incorrect
Backup buzzer does not sound
Bad air flow during exhalation valve calibration
Bad oxygen flow during exhalation valve calibration
Barometric pressure sensor check fails
Battery in use alarm does not sound on power loss
Battery minimum capacity verification
Bios upgrade error during software download
BIOS Upgrade Error during software download of 10.SP04
Calibration: Air Flow Control Valve
Calibration: Air flow valve
Calibration: Airway module
Calibration: Airway Module (Touch-based)
Calibration: airway pressure transducers
Calibration: barometric pressure transducer
Calibration: Battery performance test
Calibration: Exhalation valve
Calibration: FAS flow control valve
Calibration: flow control valves
Calibration: O2 Flow Control Valve
Calibration: O2 flow valve
Calibration: Paw span pressure adjustment
Calibration: Touchscreen
Cannot establish pressure during checkout - flow insufficient
Cannot establish pressure during checkout - pressure insufficient
Cannot pressurize breathing circuit during Paw transducer check
Checkout calculation error during resistance check
CMOS battery is weak
Configuration menu access denied
CPU Board Supply Voltage Out of Range
Degraded touchscreen performance
Dual Limb checkout skipped - not in checkout state
ECC failed
Exhalation flow sensor calibration difference excessive
Exhalation flow sensor removed during checkout
Exhalation valve calibration offset too high
Exhalation valve calibration point out of range (1.25 cmH2O)
Exhalation valve calibration point too high
Exhalation valve relief pressure relief time excessive
External device connection failure
Fall Time Measurement execution
Fan 1 status fail
Fan 2 status fail
Fan voltage out of specification
Flow difference between total and neonatal flow sensors
Flow too high during FCV calibration
Flow valve calibration cannot achieve 120 l/min
Flow valve calibration cannot hold 120 l/min flow
Flow valve calibration extrapolation failure
Free-breathing valve operation test
Inspiratory effort valve operation test
Inspiratory Paw transducer check failed - no gas supply
Inspiratory Paw transducer pressure zero calibration failed
Inspiratory Paw transducer zero error
Low air pressure
Low exhalation pressure during valve calibration
Low maximum flow
Low O2 pressure
Manage Service Password
Mechanical overpressure valve test
Multiple airway modules installed
Multiple failures in calibrations or system checks
Neonatal fail no gas supply
Neonatal flow sensor calibration fails
Neonatal reversed flow at 20 Lpm
Neonatal reversed flow at 30 Lpm
Neonatal zero check failed no gas supply
No air supply
No bootable device available
No gas supply
No oxygen supply
O2 Sensor calibration failed at 100% oxygen
O2 Sensor calibration failed at 21% oxygen
O2 sensor communication failed
Occlusion Valve Control adjustment
Oxygen flow sensor check failed - no O2 supply detected
Paracube O2 sensor check failed - 21% calibration incomplete
Pressure transducer zero ADC counts out of range
Pressure unstable during exhalation valve checkout
Program load failed - CRC
Pump Control adjustment
RAM memory error
Reference gas flow rate out of range
Regulator pressure unstable or exceeds limit
RTC date/time error
Safety valve relief check failed
Sample Gain adjustment
Single Limb checkout skipped - not in checkout state
Single Limb Relief Valve check failed
Single Limb Relief Valve check time measurement
Software download fails or shows 'Fail' status
System reset: ECxx xx xx
System reset: FFFF FF FF
Total flow too low during circuit occlusion test
Touch points are misaligned (out of calibration)
Touch points are not accessible (out of calibration)
Upstream inspiratory flow differs from total flow sensor
USB service stick license consumption on major upgrade
VCB buzzer operation test
Watchdog circuit failed
Zero Valve Control adjustment

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

Error codes

Code	Meaning	Trigger	Severity
`120 Lpm flow test`	Pre-calibration system flow verification message during exhalation valve calibration	Displayed while system attempts to flow 120 Lpm prior to flow valve calibration	info
`125 Cal Point Too High: Value`	Exhalation valve calibration point at 1.25 cmH2O exceeds maximum allowable value of 1.30 cmH2O	During exhalation valve calibration when measurement at 1.25 cmH2O cal point is above 1.30 cmH2O	error
`190 point too high`	Flow valve calibration point at 190 ml/min cannot be properly extrapolated	During flow valve calibration when low flow point cannot be extrapolated accurately	error
`Aborted`	Calibration or test in progress has been aborted	User or system aborts ongoing calibration or test procedure	warning
`Air Flow Sensor Chk`	Air flow sensor check is in progress	System initiates air flow sensor verification during checkout	info
`Air Flow Sensor Chk Complete`	Air flow sensor check passed successfully	Air flow sensor check completes without errors	info
`Air Flow Sensor Chk Fail`	Air flow sensor check failed during checkout	Air flow sensor check encounters error or fails verification	error
`Air Flow Sensor Communications Failure`	Loss of communication with Air Flow Sensor	Serial/communication link lost between vent engine and air flow sensor	error
`Air Flow Sensor Fail: No Air`	Air flow sensor step of checkout failed due to lack of air supply pressure	During air flow sensor check when low or no air supply pressure detected	error
`Air Flush Time: Value sec`	Time required to flush breathing system with air until oxygen concentration stabilizes to 0.1%	Displayed during air flush procedure before oxygen-related checks	info
`Air Supply Pres High`	Air supply pressure exceeds maximum threshold	Air supply pressure > 95 psi for > 0.5 seconds	warning
`Air Supply Pres Low`	Air supply pressure below minimum threshold	Air supply pressure < 24.3 psi for > 0.5 seconds	warning
`Air Supply Pressure Sensor Out of Range`	Air supply pressure sensor data outside acceptable range	Sensor data outside 195-4760 mV range	warning
`Air Temperature Sensor Failure`	Air temperature sensor data outside acceptable range	Sensor data outside 0-60°C range	info
`Air temperature Sensor Failure`	Ventilator unable to measure air flow temperature; delivered FiO2 may not match set	Air flow temperature sensor data unavailable or out of range	info
`Air Valve Cal`	Air valve calibration is in progress	System begins air valve calibration during checkout	info
`Air Valve Cal Complete`	Air valve calibration passed successfully	Air valve calibration completes without errors	info
`Air Valve Cal Fail`	Air valve calibration failed	During air valve calibration when verification fails	error
`Airway Module Gas Sampling Error`	MGAS module has detected a gas sampling fault condition	Gas sampling malfunction detected by MGAS module	warning
`Alarm Confirm Error`	DU detects speaker current sense bit false when attempting to sound speaker	Speaker fails to produce audible output when alarm activated	error
`Alarm Light Failure`	Alarm light not functioning	Alarm light not working	warning
`Alarm speaker not detected`	Speaker connection is faulty	Startup (POST) when speaker not detected	error
`Already reset: file D:\ELOCAL.DAT not found`	Touchscreen has been reset previously	Performing Reset Touchscreen Cal a second time	info
`Aux Span Counts: Value`	Auxiliary pressure sensor DAC counts at 100 cmH2O reference point (normal range: 3026 to 3589)	Displayed during auxiliary pressure sensor calibration	info
`Aux Zero`	Auxiliary pressure sensor zero calibration is in progress	System initiates zero-point calibration for auxiliary pressure sensor	info
`Aux Zero Complete`	Auxiliary pressure sensor zero calibration passed	Aux zero calibration completes successfully	info
`Aux Zero Fail: Value`	Auxiliary pressure sensor zero DAC reading is outside normal range (631 to 968)	During auxiliary zero calibration when DAC reading exceeds specified range	error
`Backup Buzzer POST`	Current to buzzer indicates audio is not sounding	Backup buzzer POST test detects no current to buzzer or audio not sounding	error
`Backup Mode Active - Apnea`	Backup ventilation activated due to insufficient spontaneous breathing	Spontaneous breathing insufficient	warning
`Backup Mode Active - MVexp Low`	Backup ventilation activated due to low expired minute volume	Measured expired minute volume < 50% of MVexp low alarm limit	warning
`Bad Air Flow`	Cannot achieve proper 4 l/min air flow during exhalation valve calibration	During exhalation valve calibration when air flow control valve cannot deliver sufficient flow	error
`Bad Low Pressure: Value`	Lowest pressure achieved during exhalation valve calibration exceeds 2.5 cmH2O maximum allowable	During exhalation valve calibration when minimum pressure cannot be reached low enough	error
`Bad O2 Flow`	Cannot achieve proper 4 l/min oxygen flow during exhalation valve calibration	During exhalation valve calibration when oxygen flow control valve cannot deliver sufficient flow	error
`Barometric Chk`	Barometric pressure sensor check is in progress	System initiates barometric pressure verification during checkout	info
`Barometric Chk Complete`	Barometric pressure check passed successfully	Barometric check completes without errors	info
`Barometric Chk Fail`	Barometric pressure sensor reading and calculated pressure differ by more than 20%	During barometric check when sensor reading deviates excessively from altitude-based calculation	error
`Barometric Pressure Sensor Out of Range`	Barometric pressure sensor data outside acceptable range	Sensor data outside 2163-4340 mV or 732-1196 cmH2O range	info
`Battery Charge Fail or Standby Current High`	Battery charging failure or excessive standby power draw	System powered on with battery current > 1.2A, or standby charge current > 1.7A	warning
`Battery Fail or Bulk Charge > 24 Hrs`	Battery short circuit or excessive charging time	Any battery < 10 VDC while charging, or charging > 24 hours	warning
`Battery in use`	System is operating on internal battery power due to AC power loss	AC power cord unplugged or power supply failure with system switch On	warning
`Battery in use – Low Internal Battery – 30 Min`	Mains power unavailable; internal battery remaining time less than 30 minutes	Mains power lost and battery discharge algorithm indicates <30 min remaining	warning
`Battery Missing`	Battery not detected or disconnected	Battery voltage between -1.0 and +1.0 VDC	warning
`Battery Not Connected`	Mains power lost and system operating on battery	Mains power unavailable; system powered by internal battery > 300 ms	warning
`Battery Reversed Connection`	Battery polarity reversed or severely discharged	Any battery voltage < -1.0 VDC	warning
`Calibrating Flow Valve`	Flow valve calibration procedure is currently running	System initiates flow valve calibration during checkout	info
`Cal Offset Too High`	Exhalation valve calibration offset exceeds acceptable range	Calibration point at 1.25 cmH2O is greater than 10000 counts during exhalation valve check	error
`Cal Point Too High`	Exhalation valve calibration points exceed acceptable range	Calibration points are greater than 65000 counts during exhalation valve check	error
`Cal Slope Too Steep`	Exhalation valve calibration slope exceeds acceptable range	Calibration points between 30 cmH2O and 40 cmH2O are greater than 6500 counts	error
`Can't Achieve 40 cmH2O`	Exhalation valve calibration cannot reach required pressure threshold	Exhalation valve check calibration cannot generate 40 cmH2O pressure in breathing circuit	error
`Can't Achieve 80 cmH2O`	Exhalation valve calibration cannot generate 80 cmH2O pressure in breathing circuit	During exhalation valve calibration when 80 cmH2O pressure target cannot be reached	error
`Can't Establish Pressure: Flow`	Unable to achieve 8 Lpm flow required to attempt reaching 34 cmH2O during checkout	During checkout pressure establishment step when flow target cannot be met	error
`Can't Establish Pressure: Flow`	Cannot achieve required flow during Dual Limb or Single Limb checkout step	During Dual Limb checkout, unable to achieve 8 Lpm; during Single Limb checkout, unable to achieve required pressure	error
`Can't Establish Pressure: Pressure`	Cannot achieve required pressure during Paw Transducer or Relief Valve check	Single Limb Paw check: inspiratory pressure cannot reach 1 cmH2O with 60 l/min; Single Limb Relief check: cannot reach 2 cmH2O with 80 l/min	error
`Can't Extrapolate Table`	Flow valve calibration extrapolation results in DAC counts exceeding 65,000 maximum	During flow valve calibration when weak supply pressure forces extrapolation beyond acceptable limits	error
`Can't Pressurize1: Value`	During first half of low pressure leak check, breathing circuit cannot reach 34 cmH2O	During low pressure leak check part 1 when target pressure not achieved	error
`Can't Pressurize2: Value`	During second half of low pressure leak check, breathing circuit cannot reach 25 cmH2O	During low pressure leak check part 2 when target pressure not achieved	error
`Can't Pressurize: Value`	Breathing circuit cannot reach required pressure during various checkout steps (33 cmH2O for Paw, 30 cmH2O for relief valve, stable exp pressure for exhalation valve)	During Paw check, relief valve check, or exhalation valve check when target pressure not achievable	error
`Carrier Board Overheat`	An internal DU board has overheated	DU board temperature excessive	error
`Case Fan Speed Fail`	Case fan speed less than 800 RPM	Case fan speed drops below 800 RPM threshold	error
`Checking Supply Press1`	System is testing gas supply source and integrity during FCV calibration step 1	During FCV calibration when supply pressure verification begins	info
`Checking Supply Press2`	System is testing gas supply source and integrity during FCV calibration step 2	During FCV calibration when second supply pressure verification occurs	info
`Checking Supply Press3: Value`	System is testing gas supply source and displaying measured supply pressure in psi during FCV calibration	During FCV calibration when supply pressure is measured and displayed	info
`Checkout Aborted`	Checkout procedure has been aborted	User initiates abort or system detects error requiring procedure restart	warning
`Checkout Done`	Checkout procedure completed successfully	Checkout procedure finishes all tests without critical failures	info
`Ci*1000=Value`	Intermediate compliance calculation value during low pressure leak check	Displayed during low pressure leak check compliance computation	info
`Circ Unparked Patient Detect`	Patient detected connected during standby state	Patient detected connected during standby state	error
`CMOS battery is weak`	Carrier board battery voltage is below acceptable level	Startup (POST) when battery voltage detected as weak	error
`CO2 inaccurate`	CO2 values from module may be inaccurate	CO2 sensor reading outside acceptable accuracy range	info
`CPU Board Supply Voltage Out of Range`	One or more CPU board supply voltages are outside specification	Startup (POST) when 1.5V_CB, 5V_CB, or 3.3V_CB is out of range	critical
`CPU Fan Speed Fail`	CPU fan speed less than 800 RPM	CPU fan speed drops below 800 RPM threshold	error
`CPU Overheat`	DU thermistor temperature reading exceeds 80°C	Temperature sensor reading >80°C on DU board	error
`Degraded Battery`	Battery voltage or charge state abnormal	Battery voltage > 16.5 VDC and current >= 0.25A, or not in float charge, or trickle charging > 12 hours	warning
`Disabling normalization - invalid leak`	Expiratory flow sensor normalization is disabled because leak exceeds 0.5 Lpm	During checkout when leak measurement exceeds 0.5 Lpm threshold	warning
`Disagree Temp: Value`	Air (or oxygen) flow sensor temperature differs from total flow sensor temperature by more than 9°C	During air or oxygen flow sensor check when temperature discrepancy exceeds threshold	error
`Disagree Tot: Value1 Air: Value2`	Air flow sensor reading differs from total flow sensor by more than 15% at nominal 30 l/min flow	During air flow sensor check when measured values diverge excessively	error
`Downstream Flow Diff: Value`	Flow difference between total flow sensor and neonatal expiratory flow sensor wire measured in ml/min	Measured during checkout as informational parameter	info
`DU RAM ERROR`	Self test failure or multi bit error detected	Self test failure or multi bit error detected	error
`DU to VCB Com Error Failed`	Communication from Display Unit to Ventilation Control Board failed	Communications not completed within 90 seconds after startup or 10 second window after established	error
`DU to VMB Com Error Failed`	Communication from Display Unit to Ventilation Management Board failed	Communications not completed within 90 seconds after startup or 10 second window after established	error
`ECC failed`	RAM memory error correction code circuitry is faulty	Startup (POST) when ECC check fails	critical
`End Pressure: Value`	Time required to relieve breathing circuit pressure from 34 cmH2O to below 2 cmH2O during exhalation valve check	During exhalation valve check when pressure relief time is measured	error
`ERROR!! INCOMPATIBLE SOFTWARE`	The software version on the USB Media is not compatible with the installed subsystem.	Software Download detects an incompatible subsystem during download process.	error
`Exhalation Flow Sensor Comm Failure`	Failed communications with exhalation flow sensor	Loss of serial/communication link between VMB and exhalation flow sensor PCB	critical
`Exhalation Flow Sensor Comparison`	Expelled tidal volume differs excessively from inspired tidal volume	Adult/Ped: (TVexp–TVinsp) > (0.3TVinsp) or 100ml for 6 breaths; Neo: >0.3TVinsp or 18ml	error
`Exh Flow Sensor Chk`	Exhalation flow sensor check is in progress	System initiates exhalation flow sensor verification during checkout	info
`Exh Flow Sensor Chk Complete`	Exhalation flow sensor check passed successfully	Exhalation flow sensor check completes without errors	info
`Exh Flow Sensor Chk Fail`	Exhalation flow sensor check failed; may also indicate total flow sensor failure	During exhalation flow sensor check when verification fails	error
`Exh Valve Cal`	Exhalation valve calibration is in progress	System begins exhalation valve calibration during checkout	info
`Exh Valve Cal Chk`	Exhalation valve check (post-calibration verification) is in progress	System performs exhalation valve verification after calibration	info
`Exh Valve Cal Chk Complete`	Exhalation valve calibration check passed successfully	Exhalation valve check completes without errors	info
`Exh Valve Cal Chk Fail`	Exhalation valve calibration check failed	During exhalation valve check when verification fails	error
`Exh Valve Cal Complete`	Exhalation valve calibration completed successfully	Exhalation valve calibration completes without errors	info
`Exh Valve Cal Fail`	Exhalation valve calibration failed	During exhalation valve calibration when target parameters cannot be achieved	error
`Exp Flow Cal`	Expiratory flow sensor calibration is in progress	System initiates flow sensor calibration during checkout	info
`Exp Valve Step Sweep Done`	Exhalation valve step sweep calibration has completed	After exhalation valve sweep procedure finishes	info
`Exp Valve Sweep`	Exhalation valve step sweep calibration is in progress	System begins exhalation valve sweep calibration procedure	info
`Failed 120l/min flow: Value`	During flow control valve calibration, unable to maintain 120 l/min flow for 1 second before supply pressure drops below 30 psi	During FCV calibration when supply pressure drops below minimum during high flow test	error
`Failed Supply Press2: Value`	During FCV calibration step 2, gas supply pressure is inadequate	During second FCV calibration supply pressure check when reading is insufficient	error
`Failed Supply Press3: Value`	During FCV calibration step 3, gas supply pressure is inadequate	During third FCV calibration supply pressure check when reading is insufficient	error
`Failed Supply Press4: Value`	During FCV calibration step 4, gas supply pressure is inadequate	During fourth FCV calibration supply pressure check when reading is insufficient	error
`Failed Supply Press5: Value`	During FCV calibration step 5, gas supply pressure is inadequate	During fifth FCV calibration supply pressure check when reading is insufficient	error
`Failed Supply Press6: Value`	During FCV calibration step 6, gas supply pressure is inadequate	During sixth FCV calibration supply pressure check when reading is insufficient	error
`Failed Supply Press7: Value`	During FCV calibration step 7, gas supply pressure is inadequate	During seventh FCV calibration supply pressure check when reading is insufficient	error
`Failed Supply Press8: Value`	During FCV calibration step 8, gas supply pressure is inadequate	During eighth FCV calibration supply pressure check when reading is insufficient	error
`Failed Supply Press9: Value`	During FCV calibration step 9, gas supply pressure is inadequate	During ninth FCV calibration supply pressure check when reading is insufficient	error
`Failed Supply Press: Value`	During FCV calibration, gas supply pressure is inadequate	During flow control valve calibration when initial supply pressure check fails	error
`FAIL No 120 Min: Value`	Flow valve calibration times out without reaching 120 l/min target flow	During flow valve calibration when 120 l/min target cannot be achieved within timeout period	error
`Fan Fail`	Fan Power Status Bits low; main fan or DC-DC converter fan is low	Main fan or DC-DC converter fan power status indicates low/fault	error
`fCompliance*1000= Value`	Intermediate flow compliance calculation value during low pressure leak check	Displayed during low pressure leak check compliance computation	info
`fCorrectedLeak*1000 = Value`	Intermediate corrected leak calculation value during low pressure leak check	Displayed during low pressure leak check leak calculation	info
`Final Flow Achieved: Value`	Flow value in ml/min achieved during current checkout step	Displayed at end of flow-related checkout step	info
`Final Rising Flow Achieved: Value`	Flow rise rate value in ml/min achieved during current checkout step	Displayed during rising flow checkout procedures	info
`fLeak*1000 = Value`	Intermediate leak calculation value during low pressure leak check in ml/min	Displayed during low pressure leak check leak computation	info
`Flow Cal - Waiting for Sensiron`	Total flow sensor is being configured to read correct gas type for current valve calibration	During flow calibration when total flow sensor setup is in progress	info
`Flow Diff: Value`	Flow difference between inspiratory (total) and expiratory flow sensors during exhalation flow sensor check (must be less than 20%)	During exhalation flow sensor check when difference is calculated	error
`Flow/O2 Disagree: Value1/Value2`	O2 sensor check failed; O2 and air flow set to 15 l/min; difference exceeds 5% O2	During O2 sensor checkout procedure	error
`Flow Too High: Value`	FCV leaks more than 1150 ml/min during calibration	During FCV calibration routine	error
`Flow Valve Cal Complete`	Flow valve calibration passed	After flow valve calibration routine	info
`Flow Valve Cal Fail`	Flow valve calibration failed	During flow valve calibration routine	error
`Flow Valve DAC Too Low`	FCV-DAC counts went too low without corresponding decrease in flow	During flow valve operation	error
`fPressureDifference1 10 00 = Value`	Intermediate value in low pressure leak check compliance calculation	During leak check calibration	info
`fPressureDifference2 10 00 = Value`	Intermediate value in low pressure leak check compliance calculation	During leak check calibration	info
`FRC Invalid`	FRC measurement unable to be completed within last 5 seconds	FRC measurement started but not finished within 5-second window	info
`FRC missed`	FRC series measurement unable to start within last 5 seconds	Another procedure or condition prevented FRC measurement from starting	info
`Front Panel Com Fail`	Display CPU board fails to send life tick for >10 seconds	Loss of communication heartbeat from DU CPU board to main controller for >10 sec	critical
`Guaranteed Flow Not Achieved: Value`	Could not bring flow down to target flow with minimum flow command	During checkout flow control test	error
`High Pres Air Leak Test Fail (Baro)`	Vent engine high air pressure leak test failed; invalid (low) barometric pressure reading	During high pressure air leak test	error
`High Pres O2 Leak Test Fail (Baro)`	Vent engine high O2 pressure leak test failed; invalid (low) barometric pressure reading	During high pressure O2 leak test	error
`High Pressure: Aborted`	Checkout step in progress was aborted due to high pressure	When system pressure exceeds safe limits during checkout	warning
`High Pressure Air Leak Test`	Vent engine high air pressure leak test in progress	During checkout procedure	info
`High Pressure Air Leak Test Complete`	Vent engine high air pressure leak test passed	After high pressure air leak test	info
`High Pressure Air Leak Test Fail`	Vent engine high air pressure leak test failed; measured leak was too high	During high pressure air leak test	error
`High Pressure O2 Leak Test`	Vent engine high O2 pressure leak test in progress	During checkout procedure	info
`High Pressure O2 Leak Test Complete`	Vent engine high O2 pressure leak test passed	After high pressure O2 leak test	info
`High Pressure O2 Leak Test Fail`	Vent engine high O2 pressure leak test failed; measured leak was too high	During high pressure O2 leak test	error
`InspFlowAccumulator = Value1, _jj=Value2`	Intermediate values in low pressure leak check compliance calculation	During leak check calibration	info
`Insp flow below target: >Target = Value1 >Insp = Value2`	Flow cannot be controlled to target; measured flow already lower than target	During inspiratory flow control test	error
`Insp Paw Xducer Check`	Single Limb Paw Transducer check in progress	Paw transducer calibration check initiated and running	info
`Insp Paw Xducer Check Complete`	Single Limb Paw Transducer check has finished execution	Paw transducer check completed all steps	info
`Insp Paw Xducer Check Fail (Aborted)`	Single Limb Paw Transducer check was aborted	Paw transducer check was interrupted or aborted during execution	warning
`Insp Paw Xducer Check Fail (Low Pressure)`	Single Limb Paw Transducer check failed; inspiratory pressure too low	Inspiratory pressure could not reach 1 cmH2O during check	error
`Insp Paw Xducer Check Fail (No Gas Supply)`	Single Limb Paw Transducer check failed due to absent gas supply	No gas supply detected during Paw transducer check	error
`Insp Paw Xducer Check Fail (PressureZeroCal)`	Inspiratory pressure sensor zero calibration failed	Inspiratory pressure sensor was not successfully zeroed during calibration	error
`Insp Paw Xducer OK`	Single Limb Paw Transducer check passed successfully	Paw transducer check completed all tests within acceptable parameters	info
`Insp Paw Xducer Zero Error: Value`	Inspiratory pressure sensor zero valve operation failed	Inspiratory pressure sensor zero valve was not successfully opened and closed	error
`Insp Span Counts: Value`	Inspiratory pressure sensor DAC counts for 100 cmH2O; range 3026-3589	During inspiratory pressure calibration	info
`Low Air Pressure: Value`	Air supply pressure below 30 psi	During system operation or calibration	warning
`Low Exp Pressure: Value1, Value2`	During exh valve cal, pressure dropped more than 1.25 cmH2O in 4 msec	During exhalation valve calibration	error
`Low Internal Battery – 10 Min`	Mains power not available; internal battery supply less than 10 minutes	Battery discharge algorithm calculates less than 10 minutes remaining and mains power not available	error
`Low Internal Battery – 1 Min`	Mains power not available; internal battery supply less than 1 minute	Battery discharge algorithm calculates less than 1 minute remaining and mains power not available	error
`Low Internal Battery – 20 Min`	Mains power not available; internal battery supply less than 20 minutes	Battery discharge algorithm calculates less than 20 minutes remaining and mains power not available	error
`Low Internal Battery – 5 Min`	Mains power not available; internal battery supply less than 5 minutes	Battery discharge algorithm calculates less than 5 minutes remaining and mains power not available	error
`Low Max Flow: Value`	FCV indicator that system will use degraded wall supply routine for FCV calibration	When gas supply pressure is marginal	warning
`Low O2 Pressure: Value`	O2 supply pressure below 30 psi	During system operation or calibration	warning
`Low Pres Leak Test Fail (Baro)`	Vent engine low pressure leak test failed; invalid (low) barometric pressure reading	During low pressure leak test	error
`Low Pressure Leak Chk`	Breathing circuit leak check in progress	During checkout procedure	info
`Low Pressure Leak Chk Complete`	Breathing circuit leak check passed	After low pressure leak check	info
`Low Pressure Leak Chk Fail`	Breathing circuit leak check failed	During breathing circuit leak check	error
`Low Pressure Leak Test`	Vent engine low pressure leak test in progress	During checkout procedure	info
`Low Pressure Leak Test Complete`	Vent engine low pressure leak test passed	After low pressure leak test	info
`Low Pressure Leak Test Fail`	Vent engine low pressure leak test failed; leak was too high	During low pressure leak test	error
`Measured Resistance: Value`	Resistance measured during Checkout	During checkout procedure	info
`Measure Insp Resistance Check`	Inspiratory resistance check in progress	During checkout procedure	info
`Measure Insp Resistance Check Complete`	Inspiratory resistance check passes	After inspiratory resistance check	info
`Measure Insp Resistance Check Fail`	Inspiratory resistance check failed	During inspiratory resistance check	error
`Measure Insp Resistance Check Value`	Measured inspiratory resistance value	During inspiratory resistance measurement	info
`Measure Resis Chk`	Breathing circuit resistance measurement in progress	During checkout procedure	info
`Measure Resis Chk Complete`	Breathing circuit resistance measurement completed successfully	After resistance measurement	info
`Measure Resis Chk Fail`	Breathing circuit resistance measurement failed	During resistance measurement	error
`Measuring P 0.1`	P0.1 procedure in progress	During checkout procedure	info
`Minimum Flow not achieved: Value`	Could not achieve minimum flow required for checkout step	During flow control test in checkout	error
`Module Check Sample Gas Out > 20 Sec`	Occlusion in airway module sample gas outlet	Sample gas outlet blocked for > 20 seconds	warning
`Module D-fend Not Connected > 40 Sec`	D-fend module not detected or disconnected	D-fend module not detected for > 40 seconds	warning
`Module Inlet Filter Residue > 40 Sec`	Residue buildup on water trap membrane reducing airflow	Residue detected on water trap membrane for > 40 seconds	info
`Module Line Blocked > 20 Sec`	Gas sampling line or water trap blocked	Occlusion detected in sampling line or water trap for > 20 seconds	warning
`Module Not Compatible`	Monitoring module software incompatible with system	Module detected is not compatible with system software	warning
`Module Sample Flow Deviation`	Sample gas flow rate too slow for extended period	Sample flow too slow for 20 seconds	info
`Module sensor Inop > XX`	Airway module hardware failure detected	Airway module reports RAM failure, checksum error, EEPROM error, voltage error, or lamp control failure	warning
`Module Source Dlite off`	Airway module peak pressure significantly below ventilator reading	Peak pressure measured by module < 3 cmH2O and >= 5 cmH2O below ventilator peak	critical
`Nebulizer not Connected`	Nebulizer disconnected while nebulization procedure running	Nebulizer connection lost during active nebulization	info
`Negative Pressure`	Airway pressure during inspiration <–10 cmH₂O for >50 continuous ms	Inspiratory airway pressure drops below –10 cmH₂O for >50 ms	critical
`Neo – Exh Flow Sensor Comparison`	Difference between exhalation and neonatal expired tidal volume exceeds threshold	Neo: (Exh TVexp–Neo TVexp) > (0.3*Neo TVexp) or 30 ml for 6 breaths	critical
`Neo Flow Sensor Cal`	Neonatal flow sensor calibration in progress	During neonatal flow sensor calibration	info
`Neo Flow Sensor Cal Fail`	Neonatal flow sensor calibration failed	During neonatal flow sensor calibration	error
`Neo Flow Sensor Cal Pass`	Neonatal flow sensor calibration passed	After neonatal flow sensor calibration	info
`Neo Flow Sensor Contaminated`	Neonatal flow sensor reporting flow >32 l/min for 4 continuous seconds	Neo flow sensor sustained reading exceeds 32 l/min for ≥4 seconds	error
`Neo Flow Sensor Failure`	One hot wire reporting less than 20 ADC, other reporting normal	Neo flow sensor with one hot wire reporting less than 20 ADC and other hot wire reporting normal as measured by VCB or VMB	error
`Neo module not compatible`	Incompatible module installed in neo patient mode	Any airway module installed in neo patient type mode	warning
`Neonatal Check Failed (20 Lpm)`	System unable to achieve 20 Lpm of flow during neonatal checkout	During neonatal flow test at 20 Lpm	error
`Neonatal Check Failed (Downstream)`	Expiratory flow from neonatal sensor differs from total flow sensor by more than 25%	During neonatal flow sensor comparison	error
`Neonatal Check Failed (Reaching 30)`	System unable to achieve 30 Lpm of flow during neonatal checkout	During neonatal flow test at 30 Lpm	error
`Neonatal Check Failed (Reversed @20)`	Neonatal flow sensor indicated reversed flow during 20 Lpm check	During neonatal flow test at 20 Lpm	error
`Neonatal Check Failed (Reversed @ 30)`	Neonatal flow sensor indicated reversed flow during 30 Lpm check	During neonatal flow test at 30 Lpm	error
`Neonatal Fail Failed`	Neonatal flow sensor check failed because no gas supply detected	During neonatal flow sensor test	error
`Neonatal Flow Check`	Neonatal flow sensor flow check is in progress	During neonatal flow sensor test	info
`Neonatal Flow Comparison - System`	Neo flow sensor comparison alarm active or neo-total flow sensor comparison alarm active or neoexh flow sensor comparison alarm active.	Flow sensor comparison fault detected	error
`Neonatal Flow Sensor Comparison`	Neonatal expired tidal volume differs excessively from inspired tidal volume	Neo: (TVexp–TVinsp) > (0.3*TVinsp) or 5 ml for 6 consecutive breaths	critical
`Neonatal Flow Sensor Off`	Patient Type is Neonatal but Data Source not set to Neonatal Flow Sensor	Patient Type is Neonatal, but Data Source is not set to Neonatal Flow Sensor	error
`Neonatal Flow Sensor Reversed`	Neonatal flow sensor not installed correctly	The neonatal flow sensor is not installed correctly	error
`Neonatal Zero`	Neonatal flow sensor zero check is in progress	During neonatal sensor zero calibration	info
`Neonatal Zero Failed`	Neonatal flow sensor zero check failed; no gas supply detected	During neonatal sensor zero calibration	error
`Neonatal Zero Failed (4 Lpm)`	Neonatal flow sensor zero check failed; unable to achieve 4 Lpm	During neonatal sensor zero calibration	error
`Neonatal Zero Failed (Expected 0 Flow)`	Neonatal flow sensor zero check failed; measured non-zero flow while occluded	During neonatal sensor zero calibration	error
`Neo – Total Flow Sensor Comparison`	Neonatal expired minus inspired tidal volume exceeds threshold vs total flow sensor	Neo: (TVexp–TVinsp) > (0.3*TVinsp) or 30 ml for 6 consecutive breaths	critical
`NFS Checkout Complete`	Neonatal flow sensor flow check completed	After neonatal flow sensor test	info
`NFS reports < 0 flow during > 0 flow (20 l/min)`	Neonatal flow sensor reports negative flow during positive flow test	Open circuit flow test at 20 l/min target	error
`NFS reports < 0 flow during > 0 flow (30 l/min)`	Neonatal flow sensor reports negative flow during positive flow test	Open circuit flow test at 30 l/min target	error
`NFS reports nonzero flow during 0 flow`	Neonatal flow sensor reports flow when circuit is occluded and should read zero	Circuit occlusion test at 4 l/min target	error
`No Air`	Supply pressure for Air is below 30 psi	During system operation	warning
`No bootable device available`	System cannot find a bootable device	Startup (POST) when internal CF card not accessible or corrupted	critical
`No Exhal Flow Sensor`	No Exhalation Flow Sensor connected	Exhalation flow sensor not detected at startup or during operation	error
`No Exp Flow Sensor`	Expiratory flow sensor is not detected by system	During system initialization or test	error
`No Gas Supply`	Supply pressure for both Air and O2 is below 30 psi	During system operation	critical
`None`	No calibrations, zero measurements, or checkout tests are running	During normal operation	info
`No Neonatal Flow Sensor - Standby`	Both neonatal flow sensor hot wires reporting less than 20 ADC	Both neonatal flow sensor hot wires reporting less than 20 ADC as measured by VCB or VMB	warning
`No Neonatal Flow Sensor - Therapy`	Both neonatal flow sensor hot wires reporting less than 20 ADC	Both neonatal flow sensor hot wires reporting less than 20 ADC as measured by VCB or VMB during therapy	error
`No Oxygen`	Supply pressure for O2 is below 30 psi	During system operation	warning
`Normalized Flow Comparison Failed: >Target = Value1 >I = Val`	Normalized expiratory flow and total flow differ by >10% (or >200 ml)	During flow sensor normalization check	error
`No Supply Pressure`	Supply pressure for both Air and O2 is below 30 psi	During system operation	critical
`No Supply Pressure`	O2 and air supply pressure below minimum threshold	O2 and air supply pressure < 24.3 psi for > 0.5 seconds	critical
`O2 Flow Sensor Communications Failure`	Loss of communication with O2 Flow Sensor	Serial/communication link lost between vent engine and O2 flow sensor	error
`O2 Flush Time: Value sec`	Time needed to flush system with O2 until stability of 0.1% is reached	During O2 sensor calibration	info
`O2 inaccurate`	O2 values from the module may be inaccurate	O2 values from the module detected as inaccurate	warning
`O2 Sensor Fail`	Out of range O2 sensor data (>103%) or communication error	O2 sensor reading exceeds 103% or communication loss with sensor	error
`O2 Sensor Fail`	Failed Paracube communications during O2 sensor check	During O2 sensor checkout	error
`O2 Sensor: Failed 100% Cal`	Paracube O2 sensor calibration timed out at 100% oxygen	Paracube calibration did not complete within timeout period during 100% O2 span calibration	error
`O2 Sensor: Failed 21% Cal`	Paracube O2 sensor calibration timed out at 21% oxygen	Paracube calibration did not complete within timeout period during 21% O2 span calibration	error
`O2 Supply Pres High`	O2 supply pressure greater than 95 psi for more than 0.5 seconds	O2 supply pressure > 95 psi for more than 0.5 seconds	warning
`O2 Supply Pres Low`	O2 supply pressure less than 24.3 psi for more than 0.5 seconds	O2 supply pressure < 24.3 psi for more than 0.5 seconds	error
`O2 Supply Pressure Sensor Out of Range`	Out of range O2 supply pressure sensor data	O2 supply pressure sensor data outside range of 195 to 4760 mV	warning
`O2 Temperature Sensor Failure`	Out of range O2 temperature sensor data (0–60°C range)	O2 flow temperature reading outside 0–60°C or communication loss	info
`O2 Too Low for 100% Cal`	Measured O2 concentration below 41% during 100% calibration	O2 measurement <41% during 100% span calibration attempt	warning
`O2 Too Low for 21% Cal`	Measured O2 concentration below 8% during 21% calibration	O2 measurement <8% during 21% span calibration attempt	warning
`O2 Valve Cal Complete`	O2 flow control valve calibration passed successfully	O2 Valve Cal completed without errors	info
`O2 Valve Cal Fail`	O2 flow control valve calibration failed	O2 Valve Cal did not complete successfully	error
`Occluded Patient Interface Detected`	Pressure detected at the patient inlet port	Pressure detected at the patient inlet port	error
`On Battery – Low or Medium`	Mains power not available; unit running on internal battery	AC mains power disconnected or failed	warning
`Oxygen Flow Sensor Chk Complete`	Oxygen flow sensor check passed successfully	Oxygen flow sensor check completed without errors	info
`Oxygen Flow Sensor Chk Fail`	Oxygen flow sensor check failed	Oxygen flow sensor check did not complete successfully	error
`Oxygen Flow Sensor Chk Fail: No O2`	Oxygen flow sensor check failed due to no oxygen supply detected	System unable to detect oxygen supply during sensor check	error
`Oxygen Flow Sensor Fail`	Unable to achieve 30 Lpm during oxygen flow sensor check	Maximum oxygen flow during check remains below 30 Lpm	error
`Paracube Cal Complete`	O2 sensor calibration passed successfully	Paracube calibration completed without errors	info
`Paracube Cal Fail`	O2 sensor calibration failed	Paracube calibration did not complete successfully	error
`Paracube Chk Complete`	Paracube O2 sensor check passed successfully	Paracube sensor check completed without errors	info
`Paracube Chk Fail`	Paracube O2 sensor check failed	Paracube check did not complete successfully	error
`Paracube Chk Fail (50/50 Air)`	Failed to achieve 15 Lpm airflow for 50/50 calibration	Airflow remained below 15 Lpm during 50/50 air calibration step	error
`Paracube Chk Fail (Air)`	Paracube 21% air calibration did not complete	Paracube failed to complete 21% air calibration	error
`Paracube Chk Fail (O2)`	Failed to achieve 30 Lpm O2 flow for O2 calibration	O2 flow remained below 30 Lpm during oxygen calibration step	error
`Paracube Fail`	Failed to achieve 30 Lpm air flow during Paracube check	Airflow remained below 30 Lpm during check	error
`Paracube Sensor Fail (50/50 O2)`	Failed to achieve 15 Lpm O2 flow for 50/50 calibration	O2 flow remained below 15 Lpm during 50/50 oxygen calibration step	error
`Paux High`	Paux pressure greater than 100 cmH2O	Paux > 100 cmH2O	error
`Paux Sensor Out Of Range`	Paux sensor data out of range	Paux sensor data outside range of 10-4095 mV	warning
`Paux Zeroing Error`	Paux zeroing failed; zero pressure range 631-968 mV	Paux zeroing failed; measurement outside range 631-968 mV	warning
`Paw Cross Check`	Difference between expiratory and inspiratory airway pressure excessive	Difference > 10 cmH2O for > 350 ms	critical
`Paw Exp Sensor Out of Range`	Expiratory airway pressure sensor data outside acceptable range	Sensor data outside 10-4095 mV range	critical
`Paw Exp Zeroing Error`	Expiratory pressure sensor zero offset out of range during calibration	Zero pressure reading outside 631-968 mV range	info
`Paw Insp Sensor Out of Range`	Inspiratory airway pressure sensor data outside acceptable range	Sensor data >= 50 ms or inspiratory zero valve energized >= 1 second; range 10-4095 mV	critical
`Paw Insp Zeroing Error`	Inspiratory pressure sensor zero offset out of range during calibration	Zero pressure reading outside 631-968 mV range	info
`Paw Xducer Check Complete`	Airway pressure transducer check passed successfully	Pressure sensor check completed without errors	info
`Paw Xducer Check Fail`	Airway pressure transducer check failed	Pressure sensor check did not complete successfully	error
`Paw Xducer Check Fail (PressureZeroCal)`	Pressure sensors failed to zero during calibration	Zero calibration of pressure sensors did not complete successfully	error
`Paw Xducer OK`	Airway pressure transducer check passed successfully	Pressure sensor check completed successfully	info
`PMB DC-DC Fail`	Internal power failure; AC supply OK but batteries being discharged	DC-DC converter on Power Management Board failure	error
`PMB Self Test Fail`	Power controller failed self tests (memory, voltages, or CPU)	Power Management Board internal test failure	error
`PMB to DU Com Error`	Communication failure between power controller and display unit	Communications cannot be established for 10 seconds	warning
`Power Supply Fail`	Main power supply is not available; ventilator powered by battery	Main power supply not available	error
`Power Supply Temp High`	Vicor power supply temperature exceeds 75°C	Power supply internal temperature rises above 75°C	error
`Pressure not maintained: Value`	System unable to maintain minimum 25 cmH2O pressure during relief valve check	System pressure fell below 25 cmH2O during pressure maintenance test	error
`Pressure too low`	System pressure insufficient during resistance measurement	Inspiratory limb pressure drops below required threshold during resistance check	error
`Processor Reset Failed`	Sequential watchdogs caused processor reset on VCB or VMB	Watchdog resets indicate loss of processor control	error
`Program load failed - CRC`	Software file CRC check failed during load	Startup (POST) when software CRC verification fails	error
`PSM Power Failure`	Exhalation valve heater plugged into incorrect port	Exhalation valve heater connected to port 2	error
`RAM memory error`	RAM memory hardware failure detected	Startup (POST) when RAM test fails	critical
`Relief Valve Chk Complete`	Relief valve check passed successfully	Relief valve check completed without errors	info
`Relief Valve Chk Fail`	Relief valve check failed	Relief valve check did not complete successfully or relief valve out of specification	error
`Rising Flow Not Achieved: Value`	Could not achieve minimum required flow for checkout step	Flow remained below minimum during checkout step, Value = maximum flow achieved in ml/min	error
`RTC date/time error`	Real-time clock error detected; battery may be weak	Startup (POST) when RTC error detected	error
`Safety Valve Checkout Failure`	Failed Safety Relief Valve System Check	Paw reaches 30 cmH2O within 4 seconds of check start	critical
`SBT Completed`	Spontaneous Breathing Trial time remaining expired and completed successfully	SBT countdown time expires	info
`SBT ended - Apnea`	Spontaneous Breathing Trial ended due to apnea	SBT countdown time reaches 2 minutes	warning
`SBT ended - MVexp High`	Spontaneous Breathing Trial ended due to high minute volume expiration	MVexp exceeds threshold during SBT	error
`SBT ended - MVexp Low`	Spontaneous Breathing Trial ended due to low minute volume expiration	MVexp below threshold during SBT	warning
`SBT ended - RR High`	Spontaneous Breathing Trial ended due to high respiratory rate	Respiratory rate exceeds threshold during SBT	warning
`SBT ended - RR Low`	Spontaneous Breathing Trial ended due to low respiratory rate	Respiratory rate below threshold during SBT	warning
`Sensor Disagree: Value`	Air or O2 flow sensor differs from total flow sensor by >20% or >1500 ml/min	Flow sensor difference exceeds 20% of total flow or 1500 ml/min, whichever is greater	error
`Sensor Removed`	Exhalation flow sensor was removed or disconnected during checkout	Exhalation flow sensor not detected during checkout procedure	error
`Single Limb Relief Valve check Complete`	Single Limb Relief Valve check has finished execution	Relief valve check completed all steps	info
`Single Limb Relief Valve Chk`	Single Limb Relief Valve check in progress	Relief valve calibration check initiated and running	info
`Single Limb Relief Valve Chk Fail`	Single Limb Relief Valve check did not pass	Relief valve check failed to meet acceptance criteria	error
`Single Limb Relief Valve Time: Value`	Relief valve response time measurement during check	Time measured to relieve 0.75 cmH2O pressure within 250 ms	warning
`Skipping CHECKOUT - not in checkout state`	Checkout command received while not in Checkout state	Checkout start command sent to Vent Control Board not in Checkout state	warning
`Skipping Dual Limb CHECKOUT - not in checkout state`	Dual Limb Checkout command rejected; VCB not in checkout state	Dual Limb Checkout command received while VCB not in checkout state	warning
`Skipping Single Limb CHECKOUT - not in checkout state`	Single Limb Checkout command rejected; VCB not in checkout state	Single Limb Checkout command received while VCB not in checkout state	warning
`Standby Bulk Charge > 12Hrs`	System in Standby with bulk charging duration exceeding 12 hours	Bulk charge mode active for more than 12 hours while in Standby	warning
`System reset: ECxx xx xx`	Unexpected system reset; usually indicates software failure	Startup (POST) after system reset event	error
`System reset: FFFF FF FF`	System reset due to Carrier board contact loss or low battery voltage	Startup (POST) after system reset with FFFF FF FF signature	error
`System shutdown in less than X minutes`	System will shut down if batteries not fully charged when AC power lost	AC power loss with batteries below full charge	critical
`Target flow not reached @ 300`	Flow exceeds target at minimum flow command during checkout	Flow greater than target despite minimum flow command	error
`Temp High`	Total flow sensor temperature exceeds safe limit	Total flow sensor temperature > 51°Celsius	critical
`Therapy Power Off`	Power switch is set to Off	Power switch in Off position	critical
`Total Flow Sensor Communications Failure`	Out of range Total Flow Sensor data or loss of communication	Total flow sensor reading out of range or communication link lost	critical
`Total Flow Temperature Sensor Failure`	Out of range total temperature sensor data or loss of communication	Temperature reading outside 0–60°C or communication loss from total flow sensor	info
`Total flow too high (1)`	Flow measurement during circuit occlusion exceeds acceptable range	Circuit occlusion test reads flow higher than expected at 4 l/min	error
`Total flow too high (2)`	Flow measurement during open circuit test exceeds acceptable range	Open circuit flow measurement at 20 l/min or 30 l/min reads higher than expected	error
`Total flow too low`	System cannot establish required flow for resistance measurement	Inspiratory limb resistance check cannot achieve 60 l/min flow	error
`Total flow too low (1)`	Flow measurement during circuit occlusion is insufficient	Circuit occlusion test at 4 l/min target fails to achieve zero flow reading	error
`Total flow too low (2)`	Flow measurement during open circuit test is insufficient	Open circuit flow measurement at 20 l/min or 30 l/min fails to reach target	error
`Total/Neo Exp flows disagree`	Total and neonatal expiratory flow sensor readings do not correlate	Flow comparison during circuit open state shows >25% deviation	error
`Total/Neo Insp flows disagree`	Total and neonatal inspiratory flow sensor readings do not correlate	Flow comparison during circuit open state shows >15% deviation	error
`Total resistance invalid`	Resistance check failed and invalid result returned	Calculation errors during resistance measurement (negative values or divide by zero)	error
`Total: Value1 O2: Value2`	O2 flow sensor differs >15% from total flow sensor at 30 L/min nominal	O2 flow measurement differs more than 15% from total flow sensor at 30 L/min	error
`Touchscreen Failure`	Display unit touchscreen malfunction	Touchscreen input failure detected	error
`Unable to pressurize`	Circuit could not be pressurized to minimum 10 cmH2O	System unable to generate 10 cmH2O pressure in breathing circuit	error
`Upstream Flow Failed (Upstream)`	Neonatal flow sensor inspiratory flow differs >15% from total flow sensor	Neonatal flow sensor inspiratory measurement differs >15% from total flow sensor reading	error
`VCB: Expansion Power Fail`	Exhalation valve heater or cable failure	Exhalation valve heater or cable failure, or external device connected to rear ports	error
`VCB to DU Com Error Failed`	Communication from Ventilation Control Board to Display Unit failed	Communications not completed within 10 second window (timing starts after 90 sec power-up)	error
`VMB Exp Flow Sensor Cal Fail`	Expiratory flow sensor calibration failed	Expiratory flow sensor calibration did not complete successfully	error
`VMB Exp Flow Sensor Cal Pass`	Expiratory flow sensor calibration passed successfully	Expiratory flow sensor calibration completed without errors	info
`VMB to DU Com Error Failed`	Communication from Ventilation Management Board to Display Unit failed	Communications not completed within 10 second window (timing starts after 90 sec power-up)	error
`VMB to VCB Com Error Failed`	High-speed sensor data communication from VMB to VCB failed	Communication not completed within 50 millisecond window	error
`Volume Delivery Error`	Ventilator is not delivering flow	VCB detects flow delivery failure or blockage	critical
`VT not achieved`	Tidal volume not delivered to patient	TVinsp < 80% of set TV, or set TV - 5 ml (whichever greater) for six consecutive breaths	warning
`VT not achieved - Neo`	Tidal volume not delivered to neonatal patient	TVinsp < 80% of set TV, or set TV - 1 ml (whichever greater) for six consecutive breaths	warning
`watchdog circuit failed`	Watchdog circuit hardware failure	Startup (POST) when watchdog circuit test fails	critical
`Xducer Error: Value`	Inspiratory/expiratory pressure difference exceeds 4 cmH2O during Paw Xducer check	Pressure difference between inspiratory and expiratory sensors greater than 4 cmH2O	error
`Zero out of range`	ADC counts out of acceptable zero pressure range for pressure sensors	Inspiratory and/or expiratory sensor ADC counts outside range 631-968	error

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