Gas analyzers · IntelliVue G family

Philips M1013A: troubleshooting and error codes

The ServiceForge knowledge base holds 13 documented symptoms for the Philips M1013A, with 21 ranked causes, 42 diagnostic checks with test points and expected values, and 34 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Measurement accuracy in doubt or INOP indication

Gas analyzer measurement accuracy suspect or INOP warning triggered; requires systematic troubleshooting via seven ordered tests

Ranked causes

1. Zero calibration drift or failure (common)
2. Leak in measurement circuit (common)
3. Pump malfunction (occasional)
4. Flow rate out of specification (occasional)
5. Pressure sensor failure (rare)
6. Component status failure (rare)
7. Gas calibration failure (rare)

First check

Zero calibration

Test point: Zero reference measurement
Expected: Successful zero calibration completion

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

Component Status Check fails

Status tab shows red indicators for Module INOP or Any Component Fail instead of green

Ranked causes

1. Pump malfunction (common)
2. Flowrate out of specification (common)
3. Gas analyzer hardware failure (rare)

First check

Wait for automatic zero calibration to complete

Test point: VISIA tool Status tab
Expected: First automatic zero calibration completes

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

Calibration: Annual checks

Annual service procedure for gas analyzer including pneumatic and gas calibration tests

Ranked causes

1. Routine annual maintenance required (common)

First check

Leak check

Test point: Pneumatic system
Expected: No leaks detected

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

Calibration: Electrical Safety Tests high voltage

Perform electrical safety checks according to IEC 60601-1/UL60601-1 standards using Metron Safety tester to verify instrument compliance and patient safety.

Ranked causes

1. Installation or maintenance service event requires safety validation (common)

First check

System Enclosure Leakage Current - Normal Condition

Test point: Exposed metal parts and patient environment connections
Expected: ≤ 100mA, maximum
Tools: Metron Safety tester

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

Calibration: Gas analyzer accuracy verification caution

Verify measured gas concentrations match calibration gas canister values within tolerance limits using M2211A Flow Regulator and calibration gas bottle

Ranked causes

1. Gas analyzer readings outside tolerance limits (unknown)

First check

Set Breath Detection to Disabled

Test point: General Tab
Expected: Breath Detection = Disabled

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

Calibration: Gas analyzer flow rate caution

Adjust gas analyzer flow rate to within tolerance limits using flowmeter at inlet.

Ranked causes

1. Flow rate outside tolerance limits (unknown)

First check

Connect sample line to watertrap; check pressure difference

Test point: Sample cell and ambient
Expected: Pressure difference 80–100 mbar, 80–100 mbar
Tools: VISIA tool

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

Calibration: Pressure sensor amplification

Verify pressure sensor accuracy under negative pressure (amplification test) using digital pressure indicator.

Ranked causes

1. Pressure sensor offset or calibration drift (unknown)

First check

Amplification pressure test: apply negative pressure

Test point: Sample cell
Expected: Deviation < 10 mbar between pressure indicator and VISIA tool reading, < 10 mbar
Tools: Digital pressure indicator, leakage test kit M1013-9302A, VISIA tool

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

Calibration: Pressure sensor zero offset

Verify pressure sensor accuracy at zero (ambient pressure) using independent barometer.

Ranked causes

1. Pressure sensor offset or calibration drift (unknown)

First check

Zero pressure test: measure ambient pressure

Test point: Gas analyzer inlet
Expected: Deviation < 10 mbar between barometer and VISIA tool reading, < 10 mbar
Tools: Independent digital barometer, VISIA tool

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

O2 CHANGE SCALE message displayed

O2 waveform clipped on display due to inappropriate scale selection

Ranked causes

1. Wave scale set too low for O2 signal (common)

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

O2 OVERRANGE - value exceeds measurement range

O2 numerics replaced by -?- and INOP tone; O2 value higher than maximum measurement range

Ranked causes

1. O2 measurement exceeds upper limit or sensor error (common)

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

O2 UNABLE TO MEAS - cannot measure O2

O2 numerics replaced by -?- and INOP tone; gas analyzer unable to measure O2

Ranked causes

1. O2 measurement circuit failure or sensor malfunction (occasional)

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

O2 ZERO FAILED - zero calibration failed

O2 numerics replaced by -?- and INOP tone; zero calibration attempt failed

Ranked causes

1. O2 sensor or calibration circuit failure (common)

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

VISIA tool connection issue

Serial communication not established automatically between PC and gas analyzer

Ranked causes

1. Incorrect COM port settings (common)

First check

Verify baud rate setting

Test point: COM port configuration
Expected: 19200 bps

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

Error codes

Code	Meaning	Trigger	Severity
`AGENT CALCULATING`	Gas analyzer is calculating the agent concentration	Agent concentration measurement initiated	info
`AGENT MIXTURE`	More than one agent detected in gas sample; numerics shown with ? or -?-	Multiple anesthetic agents present	warning
`<AGT> CHANGE SCALE`	Wave of the agent shown is clipped (DES/ENF/HAL/SEV/ISO)	Agent waveform exceeds display scale	warning
`AGT MEAS MALFUNCTION`	Problem with agent measurement; numerics replaced by -?-, INOP tone	Agent measurement circuit failure	error
`<AGT> OVERRANGE`	Agent value higher than measurement range; numerics replaced by -?-, INOP tone	Measured agent concentration exceeds maximum range	error
`<AGT> UNABLE TO MEAS`	Gas Analyzer cannot measure the agent shown (DES/ENF/HAL/SEV/ISO); numerics replaced by -?-, INOP tone	Requested agent measurement not configured or available	error
`AWRR OVERRANGE`	Measured respiration rate exceeds maximum range; numerics shown with -?-, INOP tone	Respiration rate measurement exceeds limit	error
`CO2 CHANGE SCALE`	CO2 waveform is clipped	CO2 waveform exceeds display scale	warning
`CO2 OVERRANGE`	CO2 value higher than measurement range; numerics replaced by -?-, INOP tone	Measured CO2 concentration exceeds maximum range	error
`CO2 UNABLE TO MEAS`	Gas Analyzer cannot measure CO2; numeric replaced by -?-, INOP tone	CO2 measurement circuit failure or not available	error
`GM ACCURACY?`	Gas analyzer measurement accuracy may be reduced	Zero is suspended	warning
`GM ALARM SUPPRESS`	Gas Analyzer alarms will be suppressed until breathing activity is first detected	System initialization or standby mode	info
`GM CAL RUNNING`	Internal calibration of the gas analyzer is running	Calibration cycle initiated	info
`GM CHECK WATERTRAP`	The watertrap is full	Watertrap fluid level exceeds capacity	warning
`GM COMPONENT MALF`	Gas analyzer component malfunction; numerics shown with -?-	Internal component failure detected	error
`GM INCOMPATIBLE`	This version of the Gas Analyzer is not supported	Incompatible firmware or hardware version detected	error
`GM MALFUNCTION`	Problem with the Gas Analyzer hardware; numerics replaced by -?-, INOP tone, Setup LED may blink	Hardware fault detected	error
`GM NO BREATH`	No breath detected; et and in numerics show the same value	No breathing activity detected at patient	warning
`GM NOT AVAILABLE`	The Gas Analyzer is either disconnected or switched off; INOP tone	Gas Analyzer offline or not connected	warning
`GM OCCLUSION`	Sample line or exhaust line tubing kinked or blocked; numerics replaced by -?-, INOP tone	Gas flow obstruction detected	error
`GM STANDBY`	Gas monitoring is in standby; alarms not active	Standby mode selected or during warmup phase	info
`GM SWITCHED OFF`	Gas analyzer switched off all internal components due to overheating; INOP tone	Internal temperature exceeds safe limit	critical
`GM WARMUP`	Gas Analyzer has not reached operating temperature; numerics shown with -?-	Device powered on, temperature not yet stabilized	info
`GM ZERO FAILED`	Gas Analyzer zero calibration failed; numerics shown with -?-	Zero calibration cycle failed to complete	error
`GM ZERO RUNNING`	Autozero in progress; numerics may show ? or -?- with INOP tone on retry	Zero calibration cycle initiated	info
`MAC CHECK SOURCES`	Not all required measurements/values available for MAC calculation; INOP tone may appear	Required measurement source unavailable or invalid	warning
`MAC CORRECTION?`	Enhanced MAC correction is on but patient age and/or temperature not available	MAC calculation requested without required parameters	warning
`N2O CHANGE SCALE`	N2O waveform is clipped	N2O waveform exceeds display scale	warning
`N2O OVERRANGE`	N2O value higher than measurement range; numerics replaced by -?-, INOP tone	Measured N2O concentration exceeds maximum range	error
`N2O UNABLE TO MEAS.`	Gas Analyzer cannot measure N2O; numerics replaced by -?-, INOP tone	N2O measurement circuit failure or not available	error
`O2 CHANGE SCALE`	O2 waveform clipped due to display scale setting	Wave scale too small to display full O2 signal amplitude	info
`O2 OVERRANGE`	O2 value exceeds maximum measurement range	O2 concentration higher than instrument maximum specification	warning
`O2 UNABLE TO MEAS`	Gas analyzer cannot measure O2 concentration	O2 measurement circuit failure or sensor malfunction	error
`O2 ZERO FAILED`	O2 zero calibration procedure failed	O2 sensor or calibration circuit unable to establish zero reference	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.