Anesthesia gas modules

Philips M1026B: troubleshooting and error codes

The ServiceForge knowledge base holds 5 documented symptoms for the Philips M1026B, with 9 ranked causes, 7 diagnostic checks with test points and expected values, and 21 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Span Check failed

Span Check procedure did not pass; errors detected in module measurement

Ranked causes

1. Leaks in reservoir bag or tubing (common)
2. Reservoir bag emptied before procedure complete (common)
3. Incorrect gas values entered (occasional)
4. Insufficient warm-up time (occasional)
5. Module measurement error or component failure (rare)

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

Calibration: Anesthetic Gas Module patient safety

Periodic verification and calibration of M1026B to ensure operation within specified limits. Required every 12 months or after repair.

Ranked causes

1. Routine maintenance and compliance requirement (common)

First check

Perform leakage check

Test point: Gas system
Expected: No leaks detected

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

Calibration: Anesthetic Gas Module span caution

Verify span calibration of anesthetic gases using check gas and calibration equipment

Ranked causes

1. Span calibration drift or incorrect gas measurement (unknown)

First check

Verify no reported errors on display

Test point: AGM display
Expected: No error messages displayed

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

Pneumatic assembly replacement required

Pneumatic assembly needs to be replaced in the anesthetic gas module

Ranked causes

1. Worn or defective pneumatic assembly (unknown)

First check

Verify all tubing connections to replacement assembly

Test point: Five tubing connections per diagram
Expected: All tubing connected correctly to designated outlets and sensors

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

Unit fails leak check patient safety

Leak check does not pass or shows error during process

Ranked causes

1. Blockage removed prematurely or not properly sealed (common)

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

Error codes

Code	Meaning	Trigger	Severity
`AGENT MIXTURE`	Agent mixture detected instead of pure agent	Multiple agents or mixed gas detected	warning
`AGM ACCURACY / GAS AN ACCURACY ?`	Gas measurement accuracy questionable	Measurement variance detected	warning
`AGM EQUIP MALF / GAS AN. EQUIP MALF`	Equipment malfunction detected	Hardware communication or subsystem failure	error
`AGM NOT AVAIL. / GAS AN. NOT AVAIL.`	Anesthesia gas module not available	Module not switched on or not properly connected	error
`AGM OCCLUSION / GAS AN. OCCLUSION`	Gas flow occlusion detected	Blocked gas inlet, outlet, or internal flow path	error
`AGM SELFTEST / GAS AN: SELFTEST`	Self-test in progress	Automatic self-test initiated at startup	info
`AGM UNABLE TO MEAS / GAS AN. UNABLE TO MEAS.`	Unable to measure gas concentration	Sensor or measurement circuit failure	warning
`AGM ZERO FAILED / GA ZERO FAILED`	Zero calibration failed	Failure during automatic zero-point calibration	error
`AGMZERO RUNNING / GAS. AN. ZERO RUNNG`	Autozero calibration in progress	Automatic zero-point calibration sequence initiated	info
`AGT CHANGE SCALE / AGT REDUCE SIZE`	Agent data cannot be displayed correctly due to scale configuration mismatch	Selected display scale does not match configured agent range	info
`<AGT> UNABLE TO MEAS.`	Gas analyzer cannot currently measure the specified agent	During gas measurement in Normal mode	error
`AGT UNABLE TO MEASURE`	Agent (anesthetic gas) data not valid	Gas analyzer unable to measure selected agent	error
`AWRR OVERRANGE`	Respiration rate exceeds measurement range	Measured respiration rate higher than device maximum	warning
`CHECK AGENT`	Selected agent does not match agent detected by gas analyzer	Agent mismatch between operator selection and analyzer detection	warning
`CO2 UNABLE TO MEASURE`	CO2 measurement unavailable	CO2 sensor or measurement circuit failure	warning
`GAS CONTAMINANT`	Gas contaminant has been detected	Contaminant detected in gas sample	warning
`INOP`	Module inoperative on IntelliVue or CMS/V24/V26 connection	Communication or functional failure detected	error
`N2O UNABLE TO MEASURE`	Nitrous oxide (N2O) data not valid	Gas analyzer unable to measure N2O	error
`O2 EQUIP MALF`	O2 equipment malfunction	O2 module improperly configured	error
`O2 UNABLE TO MEASURE`	O2 measurement unavailable	O2 sensor or measurement circuit failure	warning
`O2 ZERO FAILED`	O2 zero calibration failed	O2 sensor calibration out of range	error

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

Community

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

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