Anesthesia gas monitoring modules · SAM family

GE Healthcare SAM-80: troubleshooting and error codes

The ServiceForge knowledge base holds 37 documented symptoms for the GE Healthcare SAM-80, with 44 ranked causes, 17 diagnostic checks with test points and expected values, and 23 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Drum motor sync or speed failure

Motor sync pulse not received, drum not spinning, or servo control unable to regulate speed.

Ranked causes

1. Motor sync pulse not detected (occasional)
2. Drum not rotating (occasional)
3. Motor servo unable to control drum speed (occasional)

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

Agent/gas sanity check failure patient safety

Agent, N2O, or CO2 sensor data does not pass validation checks; IR signal or voltage out of specification.

Ranked causes

1. IR signal minimum amplitude reached or offset exceeded (occasional)
2. Sensor voltage exceeded specification (occasional)

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

Blocked line or obstructed sample path

Gas sample line or Aqua-Knot water trap blocked, preventing gas flow and causing measurement failure.

Ranked causes

1. Tubing occlusion or Aqua-Knot water trap blockage (common)
2. Excessive vacuum on scavenge port (occasional)

First check

Check for tubing occlusion

Test point: All sample and waste gas tubing
Expected: Clear, unobstructed

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

Calibration out of tolerance

Air cals unacceptable or Quick calibration results exceed tolerance limits.

Ranked causes

1. Incorrect gas type or manifold tube configuration (common)
2. Module or cell calibration drift (occasional)

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

Drum sync timing drift

Relationship between reference cells and motor sync pulse has shifted, or loss of reference gas.

Ranked causes

1. Mechanical shift in reference cell or motor assembly position (rare)
2. Sudden reference gas loss in cell (rare)

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

No breath detected patient safety

Apnea detected or poor connections preventing gas sample collection from patient circuit.

Ranked causes

1. Apnea or patient disconnection (common)
2. Poor airway or capillary line connections (common)

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

Acquisition failure

No samples received from the DSP, module not communicating properly with host monitor.

Ranked causes

1. CPU board failure or connection issue (unknown)

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

Analog multiplexer failure

Analog mux circuit not functioning properly, affecting signal routing and conditioning.

Ranked causes

1. CPU board cable connection failure (common)

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

Cables disconnected or loose caution

Power and interface cables not firmly connected, excessive tension, or visible wear on cables.

Ranked causes

1. Loose or disconnected power/interface cables (common)

First check

Visually inspect all power and interface cables

Test point: All connectors
Expected: Firmly connected with no excessive tension or wear

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

Calibration: Leak test

Annual leak test or when pneumatic circuit leak is suspected. Unit must run for at least 30 minutes for temperature stabilization. Test measures bubble count from exhaust port.

Ranked causes

1. Pneumatic circuit leak suspected (unknown)

First check

Allow unit temperature stabilization

Test point: Unit runtime
Expected: At least 30 minutes

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

Calibration: Quick calibration

Quick calibration performed every six months or when module operation is questioned. Uses single-cylinder multiple gas mixture. Module temperature must be stable (30+ minutes runtime).

Ranked causes

1. Routine calibration maintenance required (common)

First check

Module temperature stabilization

Test point: Unit runtime
Expected: At least 30 minutes

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

Calibration: Software update

Download new software to SAM/SAM-80 module using Solar/Tramscope monitor and PC laptop with programmed software diskette. Requires RS-232C to RS-422 converter and specific cable assemblies.

Ranked causes

1. Software update required or new software version available (occasional)

First check

PC hardware requirements verification

Test point: PC system
Expected: MS-DOS compatible, 1.4M 3.5-inch floppy disk drive, RS-232C serial port

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

CMOS component electrostatic discharge (ESD) damage caution

Subtle weakening or catastrophic failure of semiconductor junctions from static electricity during service.

Ranked causes

1. Exposure to electrostatic discharge during service (occasional)

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

DSP download failed

Digital Signal Processor firmware download did not complete successfully.

Ranked causes

1. CPU board cable connection failure (common)

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

EEPROM write failure

A write operation to the EEPROM has failed, preventing configuration or calibration data storage.

Ranked causes

1. CPU board cable connection issue (common)

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

Flow sensor out of calibration or faulty

Flow sensor not operating correctly or outside calibration limits.

Ranked causes

1. Flow sensor calibration drift or failure (occasional)

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

Gas cell leak detected patient safety

Reference cell for HAL, ENF, ISO, or SEVO gas is leaking, causing measurement errors.

Ranked causes

1. Gas cell reference leak (HAL/ENF/ISO/SEVO) (rare)

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

Hardware failure detected

Unspecified hardware failure detected by self-test or monitoring circuit.

Ranked causes

1. Hardware component failure (rare)

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

Module overtemperature caution

Internal temperature of the module has exceeded maximum operating temperature.

Ranked causes

1. Ambient temperature too high or cooling failure (common)

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

Module temperature too low

Temperature sensor detects temperature below 60°F (16°C), causing gas liquefaction.

Ranked causes

1. Module operating in cold environment below 60°F (16°C) (occasional)

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

Module warming up or low temperature

Module temperature sensor is detecting temperature below 60°F (16°C).

Ranked causes

1. Module temperature below minimum operating threshold (occasional)

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

Moisture detected in plumbing

Internal moisture detected in gas plumbing system, affecting measurement accuracy.

Ranked causes

1. Water condensation or ingress in plumbing (occasional)

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

PLCC removal or installation damage caution

Damage to Plastic Leaded Chip Carrier (PLCC) or socket caused by improper removal/insertion technique.

Ranked causes

1. Improper PLCC removal tool used (screwdriver instead of special tool) (occasional)

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

Pressure sensor faulty or out of calibration

Absolute pressure sensor has failed or lost calibration.

Ranked causes

1. Pressure sensor malfunction (common)

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

Processor clock out of sync

CPU clock does not correlate to the 240 Hz rate of the Tram-rac timing reference.

Ranked causes

1. CPU or crystal timing failure (rare)

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

Programmable gain circuit incorrect

First step in the programmable gain circuit is incorrect, affecting signal amplification.

Ranked causes

1. CPU board cable connection failure (common)

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

Pump does not achieve target flow rate

Pump runs but cannot reach the desired gas flow rate.

Ranked causes

1. Pump or plumbing malfunction (common)

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

Pump not pumping

Pump fails to move gas sample through the module.

Ranked causes

1. Pump failure (common)

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

Rear connector damaged or obstructed caution

Foreign debris or crushed pin connections at the rear connector.

Ranked causes

1. Foreign debris or crushed connections on rear connector (occasional)

First check

Visually inspect rear connector

Test point: Module rear connector
Expected: Clean, no debris, pins undamaged

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

Sample line blocked or water trap obstructed

Tubing occlusion or Aqua-Knot water trap blockage preventing sample gas flow.

Ranked causes

1. Tubing occlusion or water trap blockage (common)

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

Service module moisture message patient safety

Moisture is detected in the internal plumbing.

Ranked causes

1. Moisture ingress in sample plumbing (occasional)

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

Significant plumbing leak

Leak detected in gas plumbing system, causing sample loss and measurement errors.

Ranked causes

1. Valve or tubing connection leak (occasional)

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

Software update verification

Verify successful software download by checking monitor software revisions match expected versions. Repeat procedure if revisions not properly updated.

Ranked causes

1. Verification of successful software update required (common)

First check

Access SOFTWARE REVISION menu and display SAM/SAM-80 version

Test point: Monitor display
Expected: SAM/SAM-80 software revision number displayed after selecting NEXT

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

Surface-mounted component damage during service caution

Destruction of circuit board or surface-mounted integrated circuits caused by improper soldering equipment or techniques.

Ranked causes

1. Conventional soldering iron used on surface-mounted components (rare)

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

Unknown error

System has encountered an unidentified error condition.

Ranked causes

1. Unknown fault (unknown)

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

Valve driver fail line active caution

Valve driver chip is in an overcurrent condition.

Ranked causes

1. Valve driver chip overcurrent (occasional)

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

Valves failed start-up sequence

Valves do not initialize correctly during module startup.

Ranked causes

1. Valve or plumbing failure (common)

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

Error codes

Code	Meaning	Trigger	Severity
`ACQUISITION`	No samples received from the DSP	DSP communication failure or no data output from processor	error
`AGENT SENSOR, N2O SENSOR, or CO2 SENSOR`	Agent/gas sensor data not passing sanity checks or IR signal/voltage out of specification	Sensor self-test failure; IR signal amplitude at minimum or offset exceeded; sensor voltage exceeds spec	error
`ANALOG MUX`	The analog mux is suspect	Analog multiplexer self-test or signal routing failure	error
`BLOCKED LINE`	Blocked line or blocked Aqua-Knot water trap	Sample gas flow obstruction detected	error
`BLOCKED LINE`	Sample inlet is blocked or pneumatic circuit blockage detected	Sample inlet is completely blocked or pneumatic circuit detects blockage during normal operation	warning
`CALIBRATE MODULE`	Quick calibration failed or values out of acceptable range	CO2 calibration did not complete successfully or peak values too far out of range	error
`CELL/HAL, ENF, ISO, or SEVO`	Leak in the reference cell for the indicated gas	Loss of reference gas pressure or signal detected from cell	critical
`CHECK SAMPLE LINE/CHECK AQUA-KNOT`	Blocked line or blocked Aqua-Knot water trap	Sample line occlusion detected	error
`DRUM`	Motor sync failure, drum not spinning, or motor servo control fault	Motor sync pulse not received; drum rotation not detected; servo cannot achieve speed target	error
`DRUM SYNC`	Reference cell to motor sync pulse timing change or loss of reference gas	Sync timing shift detected; reference gas pressure loss detected in cell	error
`DSP`	The DSP download failed	DSP firmware load did not complete successfully	error
`FLOW`	The flow sensor is faulty or has gone out of calibration	Flow measurement validation failed; differential pressure sensor out of range	error
`GAIN`	The first step in the programmable gain circuit is incorrect	Gain circuit validation failed during power-up or self-test	error
`GAS LIQUEFIED`	Module temperature sensor is detecting temperature below 60°F or 16°C	Temperature sensor reading drops below 60°F (16°C)	warning
`HARDWARE ERROR`	Hardware failure detected	Self-test or monitor circuit detected hardware fault	critical
`MOISTURE`	Moisture is detected in the internal plumbing	Moisture sensor detects water in gas path	warning
`NO BREATH DETECTED`	Apnea or poor connections detected	No breath signal detected within expected timeframe	warning
`O2 SENSOR`	The sensor failed the power up tests (does not apply to SAM 80)	O2 sensor power-up self-test failed	error
`PLUMBING`	Significant leak in plumbing detected	Pressure drop or flow rate anomaly detected in plumbing system	error
`ROM FAIL`	A write to the EEPROM has failed	EEPROM write operation could not complete	critical
`ROOM AIR CAL IN PROGRESS`	Air calibration in progress	Room air calibration sequence initiated	info
`SERVICE MODE`	Module is in the Service Menu	User accessed Service Menu for module	info
`SERVICE MODULE`	Module failure with specific error in CO2 and/or Gas windows	Module detected internal fault condition	critical

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.