Capnography modules · CapnoFlex family

GE Healthcare CapnoFlex LF: troubleshooting and error codes

The ServiceForge knowledge base holds 9 documented symptoms for the GE Healthcare CapnoFlex LF, with 19 ranked causes, 20 diagnostic checks with test points and expected values, and 7 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Display shows CHECK ADAPTER or ADAPTER CAL message patient safety

Module detected failure in CO2 circuit or internal board and displays adapter error

Ranked causes

1. Cannula or sample line not inserted or not properly installed (common)
2. Sample line fouled or needs zero calibration (common)
3. Defective or contaminated cannula/sample line (occasional)
4. CO2 module board failure (occasional)

First check

Verify cannula or sample line is inserted into module inlet

Expected: Line fully inserted

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

Display shows CAL SENSOR TO ZERO CELL or CALIBRATE SAMPLE LINE message patient safety

Module requires zero point calibration for accurate CO2 measurement

Ranked causes

1. Zero point calibration required for normal operation (common)
2. Sample line not properly installed (common)
3. Defective sample line (occasional)

First check

Perform zero cell calibration per module procedure

Expected: Message clears after calibration

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

Display shows WARNING UP message patient safety

Module is in warm-up phase or warning state for warm-up condition

Ranked causes

1. Module warm-up cycle in progress (common)
2. Cannula or sample line not properly installed (common)
3. Defective cannula or sample line (occasional)

First check

Wait 1 minute for module warm-up to complete

Expected: Message clears after warm-up

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

Display shows CAL ERROR SENSOR message patient safety

Sensor calibration failed or sensor has an electrical or functional error

Ranked causes

1. Defective or contaminated cannula/sample line (common)
2. CO2 module board or sensor failure (occasional)

First check

Replace cannula/sample line with new one

Expected: Error clears with new line

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

Display shows CANNOT CALIBRATE message patient safety

Module calibration cannot proceed because a breath is detected or timing is wrong

Ranked causes

1. Module detected breath signal during calibration attempt (common)
2. Calibration timing issue or sensor failure (occasional)

First check

Wait 2 minutes for any breath signal to clear before retrying

Expected: Breath signal cleared

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

Module test setup configuration

Proper connection of CapnoFlex LF module to patient monitor before calibration verification

Ranked causes

1. Module must be correctly connected to monitor type (common)
2. Dual CO2 module pump must be disabled for sidestream mode (occasional)

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

Calibration: CO2 module verification

Yearly calibration verification of CapnoFlex LF CO2 module to ensure accurate CO2 measurement

Ranked causes

1. Calibration verification required annually (common)

First check

Verify equipment availability

Test point: Equipment kit
Expected: Gas scavenging adapter pn 9504-016, CO2 module calibration kit pn 405910-001, water beaker, flow meter 0-100 ml/min

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

Display shows SERVICE CO2 SENSOR message patient safety

CO2 sensor requires service or has failed and needs replacement

Ranked causes

1. CO2 sensor has reached end of service life or failed (common)

First check

Return module to service for sensor replacement

Expected: Module returned with new sensor installed

Display shows SERVICE CO2 TEMP message patient safety

Temperature sensor for CO2 measurement has failed

Ranked causes

1. Temperature sensor failure requiring replacement (common)

First check

Return module to service for temperature sensor replacement

Expected: Module serviced with new sensor

Error codes

Code	Meaning	Trigger	Severity
`CAL ERROR SENSOR`	Sensor calibration failed or sensor has error	Detected during calibration or after line replacement	error
`CAL SENSOR TO ZERO CELL or CALIBRATE SAMPLE LINE`	Module requires zero point calibration to establish baseline	Appears when sensor zero point needs to be set or reset	warning
`CANNOT CALIBRATE`	Calibration cannot proceed due to detected breath or timing issue	Appears when breath is detected during calibration attempt	warning
`CHECK ADAPTER ADAPTER CAL`	CO2 measurement failure in module board or flow circuit	Detected during inlet occlusion test or normal operation	error
`SERVICE CO2 SENSOR`	CO2 sensor has reached end of life or requires replacement	Appears when sensor failure is detected	error
`SERVICE CO2 TEMP`	Temperature sensor failure	Detected when temperature measurement circuit fails	error
`WARNING UP`	Module is in warm-up phase or warm-up condition detected	Appears during initial power-up or after service	warning

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

Community

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

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