Anesthesia machines

Dräger Narkomed 4: troubleshooting and error codes

The ServiceForge knowledge base holds 59 documented symptoms for the Dräger Narkomed 4, with 127 ranked causes, 237 diagnostic checks with test points and expected values, and 155 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

O.R. DATA MANAGER display blank

O.R. DATA MANAGER remote display screen shows no output; user cannot access data manager functions

Ranked causes

1. Remote display not plugged in (occasional)
2. Interface panel cable disconnected (occasional)
3. Remote display defective (common)
4. Backplane assembly defective (common)
5. Processor board defective (NM4 mode only) (occasional)
6. Backup processor board defective (NM4 mode only) (occasional)
7. O.R. DATA MANAGER CPU assembly defective (common)
8. O.R. DATA MANAGER video cable defective or disconnected (occasional)

First check

Test if display blank in both NM4 and ORDM modes

Test point: Display output
Expected: Display functional in both modes

14 more checks with pass and fail actions, 9 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Alarm silence function failure patient safety

Silence button or key not functioning at main or remote alarm panels

Ranked causes

1. Backplane assembly defect (common)
2. Remote display malfunction (occasional)
3. Front bezel assembly failure (occasional)
4. Processor board failure (occasional)
5. Internal wiring harness disconnection (rare)

First check

Unit functional and passes PMS

Test point: System startup
Expected: Unit operational, PMS completed successfully

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

DataScan function not logging data

DataScan readings not present on remote display; data logging not functioning

Ranked causes

1. Processor board defect (common)
2. Backplane assembly failure (occasional)
3. Front bezel assembly failure (occasional)
4. Remote display malfunction (occasional)

First check

Unit functional and passes PMS

Test point: System startup
Expected: Unit operational, PMS completed successfully

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

Disk error messages on remote display

System displays disk error messages including disk full, invalid, not inserted, or general error during operation.

Ranked causes

1. Disk not inserted or not detected (common)
2. Disk invalid or corrupted (common)
3. Disk full or insufficient space (common)
4. CPU assembly defective or disk drive failure (occasional)

First check

Is disk not inserted error on remote display

Test point: Remote display messages
Expected: No disk not inserted message

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

External printer not functioning

External printer does not function or does not respond to print commands from system.

Ranked causes

1. External printer power not connected (common)
2. External printer cable not connected to system (common)
3. Internal printer cable disconnected from CPU or backplane (common)
4. ORDM CPU assembly defective (occasional)

First check

Is external printer power connected

Test point: Printer power cord
Expected: Power cord connected and printer powered on

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

Loss of blood pressure monitor patient safety

NIBP (non-invasive blood pressure) monitor error, cuff error, or cuff disconnect displayed

Ranked causes

1. Backplane assembly failure (common)
2. NIBP pump and sensor circuit assembly failure (occasional)
3. Processor board defect (occasional)
4. NIBP cuff leak or disconnection (common)

First check

Unit functional and passes PMS

Test point: System startup
Expected: Unit operational, PMS completed successfully

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

Loss of GAS monitor patient safety

CO2/AGT error or CO2 line blockage indicated on central alarm panel

Ranked causes

1. Processor board failure (common)
2. Backplane assembly defect (occasional)
3. MULTISPEC analyzer failure (occasional)
4. Occluded sample line or water trap (common)

First check

Unit functional and passes PMS

Test point: System startup
Expected: Unit operational, PMS completed successfully

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

Loss of pulse oximetry monitor patient safety

SpO2 monitor display panel blank or oximeter error indicated

Ranked causes

1. Processor board defect (common)
2. Backplane assembly failure (occasional)
3. SpO2 sensor circuit assembly failure (occasional)
4. SpO2 cable disconnection (common)

First check

Unit functional and passes PMS

Test point: System startup
Expected: Unit operational, PMS completed successfully

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

ORDM communication error on remote display

Remote display shows ORDM communication error advisory. Communications between main and backup processors may be affected.

Ranked causes

1. Data cable disconnected or loose between CPU and backplane (common)
2. ORDM CPU communication failure (occasional)
3. Backup processor board failure (occasional)
4. Main processor board failure (occasional)

First check

Is ORDM COM error present on remote display

Test point: Remote display advisory
Expected: No ORDM COM error

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

Vitalink communication failure

Host fails to communicate with peripheral device; unit may be non-functional or display monitoring data

Ranked causes

1. Processor board defective (common)
2. Backplane assembly defective (common)
3. Serial interface assembly defective (common)
4. Peripheral cable disconnected or misconfigured (occasional)

First check

Complete preventive maintenance

Test point: Unit functional status
Expected: Unit passes PMS

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

Calibration: Display arm tension adjustment

Display arm does not maintain position when raised or lowered, or excessive free swing at machine mount joint

Ranked causes

1. Friction adjustment screw too loose or over-tightened (common)
2. Excessive free swing at machine mount joint (occasional)
3. Remote display assembly mounting screw loose (occasional)

First check

Verify display arm returns to approximately horizontal position after raising and releasing

Test point: Display arm
Expected: Returns to approximately horizontal position

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

Expiratory valve dome pins or discs damaged patient safety

Expiratory valve does not seal or pass flow; may cause gas leakage or backpressure in expiratory breathing circuit.

Ranked causes

1. Mechanical damage to expiratory valve crater pins (occasional)
2. Mechanical damage to expiratory valve dome pins (occasional)
3. Expiratory valve disc worn or deteriorated (occasional)

First check

Inspect expiratory valve crater pins

Test point: Expiratory valve crater
Expected: No damage to pins

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

Inspiratory valve dome pins or discs damaged patient safety

Valve does not seal or pass flow properly; may cause gas leakage or resistance in inspiratory breathing circuit.

Ranked causes

1. Mechanical damage to inspiratory valve crater pins (occasional)
2. Mechanical damage to inspiratory valve dome pins (occasional)
3. Inspiratory valve disc worn or deteriorated (occasional)

First check

Inspect inspiratory valve crater pins

Test point: Inspiratory valve crater
Expected: No damage to pins

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

Internal printer not working

Printer does not respond or produce output; recording function unavailable

Ranked causes

1. Printer cable disconnected (occasional)
2. Backplane assembly defective (common)
3. Internal printer defective (common)

First check

Complete preventive maintenance

Test point: Unit functional status
Expected: Unit passes PMS

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

Keyboard error or keyboard not present during power-up

System detects keyboard error or keyboard not found during power-up. Keyboard may be disconnected or defective.

Ranked causes

1. Keyboard cable disconnected from CPU board J5 (common)
2. Keyboard assembly defective (occasional)
3. CPU assembly defective (occasional)

First check

Is keyboard cable connected to CPU

Test point: CPU board J5 and monitor box floating connector
Expected: Connected

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

Loss of breathing pressure monitor patient safety

Barometric pressure monitor (BAROMED) error displayed on central alarm panel

Ranked causes

1. Processor board defect (common)
2. VPO board failure (occasional)
3. Pilot line disconnection (occasional)

First check

Unit functional and passes PMS

Test point: System startup
Expected: Unit operational, PMS completed successfully

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

Loss of O2 monitor patient safety

Oxygen monitor display absent or error indicated on central alarm panel

Ranked causes

1. Processor board failure (common)
2. VPO board malfunction (occasional)
3. Oxygen sensor failure (occasional)

First check

Unit functional and passes PMS

Test point: System startup
Expected: Unit operational, PMS completed successfully

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

Loss of respiratory volume monitor patient safety

Spirometric error (SPIROMED ERR) or volume sensor disconnect (VOL SEN DISC) displayed

Ranked causes

1. Backplane assembly failure (common)
2. VPO board defect (occasional)
3. Respiratory volume sensor failure (occasional)

First check

Unit functional and passes PMS

Test point: System startup
Expected: Unit operational, PMS completed successfully

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

New Patient Alarm not displayed patient safety

New patient alarms absent from central alarm panel display

Ranked causes

1. Remote display malfunction (common)
2. Backplane assembly failure (occasional)
3. Processor board defect (occasional)

First check

Unit functional and passes PMS

Test point: System startup
Expected: Unit operational, PMS completed successfully

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

No audio alarms patient safety

Warnings and cautions not audibly announced; speaker output absent

Ranked causes

1. Backplane PCB failure (common)
2. Processor board defect (occasional)
3. Speaker failure or wiring issue (occasional)

First check

Unit functional and passes PMS

Test point: System startup
Expected: Unit operational, PMS completed successfully

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

Oxygen supply pressure alarm not functional patient safety

Oxygen supply pressure alarm does not trigger when required; critical safety monitoring lost

Ranked causes

1. Alarm channel assembly defective (common)
2. Oxygen supply pressure alarm switch defective (common)
3. Wire harness damaged or disconnected (occasional)

First check

Complete preventive maintenance

Test point: Unit functional status
Expected: Unit passes PMS

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

Oxygen/nitrous oxide ratio alarm not functional patient safety

O2/N2O ratio monitoring alarm does not trigger when required; patient safety monitoring compromised

Ranked causes

1. Backplane assembly defective (common)
2. ORMC adjustment out of specification (occasional)
3. Alarm channel assembly defective (common)

First check

Complete preventive maintenance

Test point: Unit functional status
Expected: Unit passes PMS

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

Touch screen failure

Touch screen not responsive to user input or touch commands not registering

Ranked causes

1. Processor board defect (common)
2. Backplane assembly failure (occasional)
3. Front bezel assembly failure (occasional)

First check

Unit functional and passes PMS

Test point: System startup
Expected: Unit operational, PMS completed successfully

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

B drive error messages on remote display

System displays B drive error messages during operation or at power-up.

Ranked causes

1. CPU assembly defective (common)
2. Memory battery defective or depleted (common)

First check

Are any B drive errors shown on remote display

Test point: Remote display messages
Expected: No B drive errors

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

Display screens blank on power-up

Both display panels remain blank when system powered on; no display output visible

Ranked causes

1. Front bezel assembly defective (common)
2. Backplane assembly defective (common)

First check

Complete preventive maintenance

Test point: Unit functional status
Expected: Unit passes PMS

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

Measurement data incorrect patient safety

Analyzer displays or reports incorrect measurement values; patient monitoring data unreliable

Ranked causes

1. Cooling fans not operating (common)
2. Multispec analyzer assembly defective (common)

First check

Complete preventive maintenance

Test point: Unit functional status
Expected: Unit passes PMS

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

No keypanel or selection dial response

Keypanel buttons and/or selection dial do not respond to user input; unit not controllable

Ranked causes

1. Backplane assembly defective (common)
2. Front bezel assembly defective (common)

First check

Complete preventive maintenance

Test point: Unit functional status
Expected: Unit passes PMS

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

Power supply voltage out of tolerance or backup battery mismatch high voltage

Red LED DS2 on power supply board lighted indicating voltage fault or battery level difference

Ranked causes

1. One or more DC-DC converter output voltages out of range (common)
2. Backup battery voltage levels differ by more than 1.1 volt (occasional)

First check

Verify all voltages present at backplane connectors J28, J29, J30

Test point: Backplane connectors J28, J29, J30
Expected: All voltages within acceptable ranges per Table 3-1
Tools: DMM

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

Processor test failure detected

Main or Back-Up processor board reports failure during self-diagnostics on power-up; green lamp on processor board indicates power status

Ranked causes

1. Main processor board defective (unknown)
2. Back-Up processor board defective (unknown)

First check

Observe display during power-up self-diagnostics

Test point: Display
Expected: PASS or FAIL result shown for each test

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

SpO2/Pulse monitor not reading patient safety

Monitor fails to display oxygen saturation or pulse rate values after sensor connection

Ranked causes

1. Nellcor sensor or pre-amp cable disconnected or faulty (common)
2. Novametrix sensor extension cable disconnected or faulty (common)

First check

Verify Nellcor MP-202 module oxygen saturation reading with pocket simulator

Test point: Monitor display
Expected: 80 to 82 for oxygen saturation, 60 to 62 for pulse rate %, 80-82 SpO2, 60-62 bpm

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

Calibration: Gas Analyzer Monitor patient safety

Span calibration procedure for multispec monitor accessible via Service/Test Hardware screen

Ranked causes

1. Gas analyzer (multispec) monitor requires span calibration (common)

First check

Access Gas Analyzer Monitor calibration screen

Test point: Service/Test Hardware screen
Expected: GAS ANALYZER MONITOR option accessible

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

Calibration: Machine mount joint shoulder screw torque

Display arm has excessive free swing at the machine mount joint

Ranked causes

1. Shoulder screw at machine mount joint under-torqued (common)

First check

Tighten shoulder screw at machine mount joint to correct torque

Test point: Machine mount joint shoulder screw
Expected: 75 in. lbs.
Tools: Torque wrench

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

Calibration: NIBP inflation pressure patient safety

Verify that the NIBP module inflates the blood pressure cuff to the correct pressure during operation.

Ranked causes

1. NIBP module pressure calibration out of specification (unknown)

First check

Verify external pressure gauge reading during cuff inflation

Test point: External pressure gauge in test fixture TEE
Expected: 180 mm Hg
Tools: External pressure gauge, test fixture TEE assembly

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

Calibration: NIBP Monitor patient safety

Cuff inflation pressure verification procedure accessible via Service/Test Hardware screen

Ranked causes

1. NIBP monitor cuff inflation pressure requires verification (common)

First check

Access NIBP Monitor calibration verification screen

Test point: Service/Test Hardware screen
Expected: NIBP MONITOR option accessible

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

Calibration: Oxygen sensor zero patient safety

Oxygen sensor requires zero calibration adjustment to establish baseline cell current values before clinical use.

Ranked causes

1. Oxygen sensor zero calibration required (common)

First check

Remove oxygen sensor assembly from inspiratory valve dome

Test point: Inspiratory valve dome
Expected: Sensor assembly removed

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

Calibration: Pressure Monitor patient safety

Zero and span calibration procedures for pressure monitor accessible via Service/Test Hardware screen

Ranked causes

1. Pressure monitor requires zero or span calibration (common)

First check

Access Pressure Monitor calibration screen

Test point: Service/Test Hardware screen
Expected: PRESSURE MONITOR option accessible

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

Calibration: Remote display assembly mounting torque

Remote display assembly or Datagriп mounting needs adjustment for proper tension

Ranked causes

1. Remote display assembly mounting screw under-torqued (common)

First check

Remove plastic cap at end of display arm

Test point: Display arm end cap
Expected: Cap removed to expose mounting screw

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

Expiratory valve washer under flow sensor degraded caution

Washer does not seal properly under expiratory valve; may cause gas leakage or improper flow sensor function.

Ranked causes

1. Washer under expiratory valve worn or deteriorated (occasional)

First check

Inspect washer under expiratory valve

Test point: Washer under expiratory valve
Expected: Good condition, not worn or cracked

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

Incorrect display screen shown

Wrong monitor screen displayed; unit may not show expected interface or data

Ranked causes

1. Backplane assembly defective (common)

First check

Complete preventive maintenance

Test point: Unit functional status
Expected: Unit passes PMS

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

Loose interconnecting cables caution

Ribbon cables or wire harnesses between suspected assemblies not properly seated

Ranked causes

1. Improper cable connection during assembly or service (occasional)

First check

Visual inspection of cable connections

Test point: Between processor boards and peripheral devices
Expected: All cables fully seated

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

MAN/AUTO selector valve sticking or not responding caution

Selector valve does not switch smoothly between manual and automatic modes; may require excessive force or fail to engage.

Ranked causes

1. Excessive lubricant residue in valve channel or body (common)

First check

Inspect valve channel and body for residual lubricant

Test point: Valve channel and valve body interior
Expected: Clean, free of lubricant residue

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

Missing backplane voltages high voltage

Voltage measurements missing at backplane connectors J28, J29, or J30 during startup or operation

Ranked causes

1. Power supply failure or malfunction (unknown)

First check

Verify all voltages present at backplane

Test point: J28, J29, J30 or J15
Expected: All voltages per Table 3-1
Tools: DMM

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

Multispec analyzer not in full accuracy mode

CO2 and Agent warm-up messages appear on advisory display, preventing valid accuracy testing

Ranked causes

1. Multispec warm-up cycle in progress (common)

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

O-rings on oxygen sensor housing or plug degraded patient safety

O-rings do not seal; oxygen sensor assembly leaks or does not mount properly on inspiratory valve dome.

Ranked causes

1. O-rings on oxygen sensor housing or plug cracked, dried, or deteriorated (occasional)

First check

Inspect O-rings on oxygen sensor housing and plug

Test point: O-rings on O2 sensor housing and oxygen sensor plug
Expected: O-rings intact, pliable, no cracks or drying

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

O2 supply alarm activates outside setpoint range patient safety

Alarm triggers below 34 psi or above 40 psi instead of within the correct 40–34 psi band

Ranked causes

1. Oxygen supply pressure alarm switch setpoint out of adjustment (common)

First check

Verify test gauge is connected to TEE fitting in O2 regulator output line

Test point: TEE fitting, 1/4 in. diameter O2 regulator output line
Expected: Test gauge properly connected and reading pressure
Tools: O2 test gauge

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

Oxygen sensor cell current values

Verify recorded oxygen sensor fuel cell A and cell B zero calibration current values for documentation.

Ranked causes

1. Zero calibration values recorded (common)

First check

Verify CURRENT CELL A and CELL B values displayed before STORE ZERO

Test point: Display screen current cell readout
Expected: CURRENT CELL A: 3, CURRENT CELL B: 6 (or equivalent current values for the sensor)

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

Oxygen sensor replacement patient safety

Sensor located on inspiratory valve requires replacement or maintenance

Ranked causes

1. Oxygen sensor capsule degradation or failure (unknown)

First check

Set System Power switch to STANDBY

Test point: System Power switch
Expected: STANDBY position

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

Oxygen supply alarm activates above setpoint range patient safety

Alarm activates when oxygen pressure is above 40 psi instead of between 40 and 34 psi.

Ranked causes

1. Alarm switch setpoint too high (common)

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

Oxygen supply alarm activates below setpoint range patient safety

Alarm activates when oxygen pressure falls below 34 psi instead of between 40 and 34 psi.

Ranked causes

1. Alarm switch setpoint too low (common)

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

Power supply self-test failure high voltage

Red LED DS4 remains lighted after power-up indicating self-test failure of monitoring and communication circuitry

Ranked causes

1. Power supply board monitoring or communication circuit fault (common)

First check

Observe LED DS4 status during power-up self-test

Test point: Power supply board LED DS4 (red)
Expected: LED DS4 lighted during power up, off after self-test completion

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

Power supply voltages out of tolerance caution

Measured power supply voltages do not meet specifications; power distribution compromised

Ranked causes

1. Power supply circuit board defective (common)

First check

Complete preventive maintenance

Test point: Unit functional status
Expected: Unit passes PMS

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

Power-up diagnostic test failure or setup error

One or more power-up diagnostic tests fail or setup errors occur during system initialization.

Ranked causes

1. CPU assembly defective or misconfigured (common)

First check

Do any power-up diagnostic tests fail or setup errors occur

Test point: System power-up initialization
Expected: All diagnostic tests pass, no setup errors

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

Replace SPIROMED respiratory volume sensor caution

Sensor replacement procedure for the respiratory volume sensor installed between absorber assembly and expiratory valve

Ranked causes

1. Sensor requires replacement (unknown)

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

Spiromed sensor lubrication required caution

Sensor operation stiff, sluggish, or making noise; lubrication depletion or contamination.

Ranked causes

1. Spiromed sensor insufficient or depleted lubricant (common)

First check

Locate lubrication access holes on spiromed sensor

Test point: Four lateral holes at sides of spiromed sensor
Expected: Holes visible and accessible, marked by arrows

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

Spiromed sensor washer degraded caution

Washer under sensor does not seal properly; may cause gas leakage or sensor function issues.

Ranked causes

1. Washer under spiromed sensor worn or deteriorated (occasional)

First check

Inspect washer under spiromed sensor

Test point: Washer under spiromed sensor
Expected: Good condition, not worn or cracked

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

SpO2 monitor battery depleted

Novametrix simulator not providing consistent readings or readings unstable

Ranked causes

1. Novametrix simulator 9V battery voltage below 8.5 VDC (occasional)

First check

Measure Novametrix simulator battery voltage

Test point: Battery terminals
Expected: 9.0 VDC minimum for reliable operation, >8.5 VDC for operation, <8.5 VDC requires replacement
Tools: Digital multimeter (DMM)

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

Ultrasonic flow sensor connector hose or O-ring degraded caution

Connector hose leaks, connector does not seal, or O-rings deteriorated; flow sensor does not function or provides inaccurate readings.

Ranked causes

1. Connector hose, connector, or O-ring components degraded or damaged (occasional)

First check

Inspect connector hose, connector, and O-ring condition

Test point: Ultrasonic flow sensor connector hose and assembly
Expected: Good condition, no cracks or degradation

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

Ultrasonic flow sensor transducers or O-rings degraded caution

Flow sensor provides inaccurate readings or does not function; may indicate volume/flow delivery problems.

Ranked causes

1. Transducer O-rings or components degraded or damaged (occasional)

First check

Inspect transducer O-rings and components

Test point: Ultrasonic flow sensor transducers
Expected: Good condition, no cracks or degradation

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

Valve dome washers worn or degraded caution

Washers do not provide proper seal between valve dome and valve body; may cause gas leakage or improper valve function.

Ranked causes

1. Valve dome washers worn, cracked, or deteriorated (occasional)

First check

Inspect valve dome washers condition

Test point: Valve dome washers
Expected: Good condition, not worn or cracked

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

Error codes

Code	Meaning	Trigger	Severity
`0000`	Power on	System power initialization	info
`A001`	Pattern Adjusted	Pattern adjustment performed	info
`B Drive Error Messages`	Backup drive (B:) reports various errors	Detected during disk access or power-up	warning
`C001`	O2 Store Zero A	O2 zero calibration performed	info
`C002`	O2 Store Zero B	O2 zero calibration B performed	info
`C003`	Line Block Store Reference	Line blockage reference stored	info
`C004`	Gas Analyzer - Start	Gas analyzer calibration started	info
`C005`	Gas Analyzer - Continue	Gas analyzer calibration continued	info
`C006`	NIBP Inflate	NIBP inflation calibration	info
`C007`	NIBP Stop	NIBP calibration stopped	info
`C008`	NIBP Take Reading	NIBP reading taken	info
`C009`	Respiratory Flow Store Span	Respiratory flow span calibration	info
`C010`	Respiratory Flow Store Zero	Respiratory flow zero calibration	info
`C011`	Pressure Store Span	Pressure span calibration	info
`C012`	Pressure Store Zero	Pressure zero calibration	info
`C013`	NIBP Inflation Check	NIBP inflation check performed	info
`C014`	NIBP Deflation Check	NIBP deflation check performed	info
`C015`	NIBP Leak Check	NIBP leak check performed	info
`CMOS Checksum Fail`	CMOS memory checksum error detected	Detected during power-up self test	error
`Communications Error with Host`	O.R. DATA MANAGER cannot communicate with main NM4 host	Detected during power-up or operation	error
`DG00`	Datagrip Internal Error	Datagrip module internal error	error
`DG01`	Datagrip Internal Error	Datagrip module internal error	error
`DG02`	Datagrip Internal Error	Datagrip module internal error	error
`Disk Error`	Hard disk or floppy disk error detected	Detected during power-up or disk access	error
`Disk Full Error`	Disk storage capacity exhausted	Attempted to write data when disk full	warning
`Disk Invalid Error`	Disk file system invalid or corrupted	Detected during disk access or power-up	error
`Disk Not Inserted Error`	Floppy disk not present in drive	Attempted to access floppy disk without disk inserted	info
`F011`	QPDM Address Register Error	QPDM address register test failure	error
`F012`	QPDM Data Register Error	QPDM data register test failure	error
`F013`	QPDM Vblank Int Timeout Error	QPDM vertical blank interrupt timeout	error
`F014`	QPDM VRAM Memory Error	QPDM video memory test failure	error
`F021`	PROM CRC Test Error	PROM checksum validation failure	error
`F031`	SRAM Memory Test Error	SRAM memory test failure	error
`F051`	MFP Bus Error	MFP bus communication failure	error
`F052`	MFP TimerA Error	MFP Timer A test failure	error
`F053`	MFP TimerB Error	MFP Timer B test failure	error
`F054`	MFP TimerC Error	MFP Timer C test failure	error
`F055`	MFP TimerD Error	MFP Timer D test failure	error
`F056`	System Clock Error	System clock test failure	error
`F057`	FIFO Empty Interrupt Error	FIFO empty interrupt test failure	error
`F058`	ADC Interrupt Error	ADC interrupt test failure	error
`F059`	CNTOVF Interrupt Error	Counter overflow interrupt test failure	error
`F061`	ADC Interrupt Error	ADC interrupt test failure	error
`F062`	12V to -12V Out of Tolerance Error	Power supply voltage out of range	error
`F063`	5V to GND Out of Tolerance Error	5V power supply out of range	error
`F071`	Primary Speaker Static Test Error	Speaker static test failure	error
`F072`	Primary Speaker Dynamic Test Error	Speaker dynamic test failure	error
`F073`	Primary Speaker FIFO Test Error	Speaker FIFO test failure	error
`F074`	Primary Speaker No Volume Test Error	Speaker volume test failure	error
`F081`	Backup Speaker Dynamic Test Error	Backup speaker dynamic test failure	error
`F082`	Backup Speaker No Volume Test Error	Backup speaker volume test failure	error
`F091`	SAO2 Speaker Static Test Error	SAO2 speaker static test failure	error
`F092`	SAO2 Speaker Dynamic Test Error	SAO2 speaker dynamic test failure	error
`F093`	SAO2 Speaker No Volume Test Error	SAO2 speaker volume test failure	error
`F111`	Real Time Clock Test Error	Real time clock test failure	error
`F121`	Bad File Warning	File corruption detected	warning
`F122`	Bad Files Error	File corruption detected	error
`F123`	Event Memory Error	Event memory test failure	error
`F130`	Alternate Processor Fail	Alternate processor failure	error
`F200`	UART1 Internal Init Fail	UART1 initialization failure	error
`F201`	UART1 Register Readback Fail	UART1 register read test failure	error
`F202`	UART1 Transmit Interrupt Fail	UART1 transmit interrupt failure	error
`F203`	UART1 Receive Interrupt Fail	UART1 receive interrupt failure	error
`F204`	UART1 Receive Error Interrupt Fail	UART1 receive error interrupt failure	error
`F205`	UART1 Baud Rate Test 1 Fail	UART1 baud rate test 1 failure	error
`F206`	UART1 Baud Rate Test 2 Fail	UART1 baud rate test 2 failure	error
`F207`	UART1 Baud Rate Test 3 Fail	UART1 baud rate test 3 failure	error
`F210`	UART1 Channel 0 Fail	UART1 channel 0 test failure	error
`F211`	UART1 Channel 1 Fail	UART1 channel 1 test failure	error
`F212`	UART1 Channel 2 Fail	UART1 channel 2 test failure	error
`F213`	UART1 Channel 3 Fail	UART1 channel 3 test failure	error
`F214`	UART1 Channel 4 Fail	UART1 channel 4 test failure	error
`F215`	UART1 Channel 5 Fail	UART1 channel 5 test failure	error
`F216`	UART1 Channel 6 Fail	UART1 channel 6 test failure	error
`F217`	UART1 Channel 7 Fail	UART1 channel 7 test failure	error
`F300`	UART2 Internal Init Fail	UART2 initialization failure	error
`F301`	UART2 Register Readback Fail	UART2 register read test failure	error
`F302`	UART2 Transmit Interrupt Fail	UART2 transmit interrupt failure	error
`F303`	UART2 Receive Interrupt Fail	UART2 receive interrupt failure	error
`F304`	UART2 Receive Error Interrupt Fail	UART2 receive error interrupt failure	error
`F305`	UART2 Baud Rate Test 1 Fail	UART2 baud rate test 1 failure	error
`F306`	UART2 Baud Rate Test 2 Fail	UART2 baud rate test 2 failure	error
`F307`	UART2 Baud Rate Test 3 Fail	UART2 baud rate test 3 failure	error
`F310`	UART2 Channel 0 Fail	UART2 channel 0 test failure	error
`F311`	UART2 Channel 1 Fail	UART2 channel 1 test failure	error
`F312`	UART2 Channel 2 Fail	UART2 channel 2 test failure	error
`F313`	UART2 Channel 3 Fail	UART2 channel 3 test failure	error
`F314`	UART2 Channel 4 Fail	UART2 channel 4 test failure	error
`F315`	UART2 Channel 5 Fail	UART2 channel 5 test failure	error
`F316`	UART2 Channel 6 Fail	UART2 channel 6 test failure	error
`F317`	UART2 Channel 7 Fail	UART2 channel 7 test failure	error
`H001`	Head Temperature Error	Head assembly temperature out of range	error
`Internal Diagnostic Failure upon System Power-Up`	O.R. DATA MANAGER self-test detected internal failure	Executed during power-up initialization	critical
`Interrupt Controller #1 Fail`	First interrupt controller hardware failed	Detected during power-up self test	critical
`Interrupt Controller #2 Fail`	Second interrupt controller hardware failed	Detected during power-up self test	critical
`Keyboard Error or Keyboard Not Present`	O.R. DATA MANAGER keyboard not detected or malfunctioning	Detected during power-up self test	error
`M001`	Channel Error Active CPU	Active CPU channel error	error
`M002`	Channel Error Inactive CPU	Inactive CPU channel error	error
`M003`	Command Retry	Command retry required	warning
`M004`	Communication Error	MSPEC communication failure	error
`M005`	System Fault Max	Maximum system fault threshold reached	error
`M006`	Version ID Retry	Version identification retry	warning
`M007`	Span Fail	Span calibration failure	error
`M008`	Solenoid Stuck	Solenoid valve stuck	error
`M009`	Zero Timeout	Zero calibration timeout	error
`M010`	Zero Fail Max	Maximum zero calibration failures	error
`M011`	RX Buffer Overflow	Receive buffer overflow condition	error
`M012`	No Continuous Data	Continuous data stream failure	error
`M013`	Line Block Differential	Gas line blockage detected	warning
`M014`	Line Block Less Than Minimum	Gas line blockage below minimum threshold	warning
`M016`	Multispec Shutdown	MSPEC module shutdown	error
`M101`	CO2 Channel Error	CO2 measurement channel error	error
`M102`	Channel Error O2 Info P1	O2 measurement channel error packet 1	error
`M103`	Channel Error O2 Info P2	O2 measurement channel error packet 2	error
`Memory Battery Fail`	Battery for memory backup has failed or lost charge	Detected during power-up self test	warning
`Memory in Protected Mode Fail`	Protected mode memory access failed	Detected during power-up self test	critical
`N001`	NIBP Monitor Error	NIBP module monitoring failure	error
`N002`	NIBP Communication Error	NIBP module communication failure	error
`N003`	NIBP Bad Data	NIBP data validation failure	error
`N004`	Inflation Pressure Not Greater Than 30	NIBP inflation pressure low	warning
`N005`	Error Received from NIBP	NIBP module error indication	error
`N006`	NIBP Mode Conflict	NIBP operating mode conflict	error
`NO OXI PULSE`	Novametrix SpO2 sensor signal lost or disconnected	Sensor disconnected from finger or cable unplugged for 10 seconds	warning
`NO SpO2 PULSE`	Nellcor SpO2 sensor signal lost or disconnected	Sensor disconnected from finger or cable unplugged for 10 seconds	warning
`OXI ALARMS DISABLE`	Oxygen saturation alarms disabled	Depressing both Open Test keys together during module test	info
`OXI SEN DISC`	Oxygen sensor disconnected or not detected	Depressing both Open Test keys or sensor physically disconnected	warning
`P001`	AC Fail	AC mains power lost	error
`P002`	AC Good	AC mains power restored	info
`P003`	Battery Low	Battery voltage below threshold	warning
`P004`	Battery Good	Battery voltage normal	info
`P005`	Brick Bad	Power supply module failure	error
`Printer Inoperative`	O.R. DATA MANAGER printer not responding	Attempted to print or detected during self-test	warning
`Processor Exception Interrupts Fail`	Processor exception interrupt handling failed	Detected during power-up self test	critical
`Protected Mode Fail`	Protected mode operation failed	Detected during power-up self test	critical
`PULSE LO`	Novametrix pulse signal weak or absent	Depressing Open Test RED key during simulator test or loss of sensor signal	warning
`S001`	Installation	Installation event	info
`S002`	PMS	Preventive maintenance performed	info
`S003`	Service	Service performed	info
`S004`	Secondary Service Screen Entry	Secondary service screen accessed	info
`S005`	Reset Service Date	Service date reset	info
`S006`	Service Log Clear	Service log cleared	info
`Sizing Extended Memory 00384K Not Found`	System did not detect expected extended memory	Detected during power-up self test	error
`Sizing System Memory 640K Not Found`	System did not detect expected 640K base memory	Detected during power-up self test	critical
`System Memory 640K Fail`	Base memory 640K failed self-test	Detected during power-up self test	critical
`T001`	Bad Device Recalibration	Touch panel calibration error	error
`TEM0`	Template Defaults Loaded	Template defaults loaded	info
`TEM1`	Recreating Template Database	Template database recreation	info
`TEM2`	Templates Reinitialized	Template reinitialization	info
`TEM3`	Templates Reinitialized	Template reinitialization	info
`TEM4`	Factory Defaults Installed	Factory defaults applied	info
`V001`	VTLK Communication Error	Data Manager communication error	error
`V002`	VTLK Communication Lost	Data Manager link lost	error
`V003`	VTLK Communication Regained	Data Manager link restored	info
`V010`	ORDM Startup Failure	OR Data Manager startup failed	error
`V011`	ORDM Inactive Startup Failure	OR Data Manager inactive startup failed	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.