Anesthesia machines

Dräger Narkomed 2C: troubleshooting and error codes

The ServiceForge knowledge base holds 32 documented symptoms for the Dräger Narkomed 2C, with 58 ranked causes, 85 diagnostic checks with test points and expected values, and 50 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Ventilator Inoperative patient safety

Anesthesia ventilator not functioning, no breathing assistance delivered to patient

Ranked causes

1. Incorrect breathing hose or scavenger hose connections to bellows assembly (common)
2. Cylinder or pipeline oxygen supply pressure inadequate for ventilator operation (common)
3. Ventilator settings incorrect or out of adjustment (common)
4. 8V power not present at ventilator controller J2 or power supply and connections defective (occasional)
5. Valve and guide assembly or ventilator controller defective or requires replacement (occasional)

First check

Perform complete PMC on unit

Test point: PMC self-test
Expected: Unit passes PMC

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

Display Blank Upon System Power-up

Display screen remains blank or shows no information when system is powered on

Ranked causes

1. Display cable disconnected from processor board port J4 or display assembly disconnected (common)
2. Power supply voltages out of tolerance or defective (occasional)
3. Display assembly defective or requires replacement (occasional)
4. Processor assembly defective or requires replacement (rare)

First check

Perform complete PMC on unit

Test point: PMC self-test
Expected: Unit passes PMC

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

Loss of Respiratory Volume Monitor patient safety

Respiratory volume monitor reading absent or non-functional on anesthesia machine

Ranked causes

1. Volume sensor not installed correctly or sensor cord disconnected from interface panel (common)
2. Internal cable from interface panel to J17 on processor board disconnected or failed (occasional)
3. Volume sensor defective or requires replacement (occasional)
4. Processor assembly defective or requires replacement (rare)

First check

Perform complete PMS on unit

Test point: PMS self-test
Expected: Unit passes PMS

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

No Datagrip Response

Datagrip hand control assembly is unresponsive, no input received from Datagrip controls

Ranked causes

1. Datagrip cable disconnected from processor port J3 or Datagrip assembly disconnected (common)
2. Power supply voltages out of tolerance or defective (occasional)
3. Datagrip assembly defective or requires replacement (occasional)
4. Processor assembly defective or requires replacement (rare)

First check

Perform complete PMC on unit

Test point: PMC self-test
Expected: Unit passes PMC

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

No O2 Supply Pressure Alarms patient safety

Oxygen supply pressure alarm system non-functional, no alarm indication when O2 pressure is low or out of range

Ranked causes

1. O2 low pressure alarm switch, wire harness, or connections to alarm channel damaged or disconnected (common)
2. Cable or connections between alarm channel J1 and processor board J16 disconnected or damaged (occasional)
3. Alarm channel defective or requires replacement (occasional)
4. Processor assembly defective or requires replacement (rare)

First check

Perform complete PMC on unit

Test point: PMC self-test
Expected: Unit passes PMC

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

Display Keypanel Inoperative

Display keypanel buttons or input controls are unresponsive to operator input

Ranked causes

1. Display assembly disconnected or requires reconnection (common)
2. Display assembly defective or requires replacement (occasional)
3. Processor assembly defective or requires replacement (rare)

First check

Perform complete PMC on unit

Test point: PMC self-test
Expected: Unit passes PMC

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

Loss of O2 Monitor patient safety

O2 monitor display or reading is absent or non-functional, anesthesia machine unable to monitor oxygen concentration

Ranked causes

1. Sensor element not installed correctly or sensor cord disconnected from interface panel (common)
2. Internal cable from interface panel to J1 on processor board disconnected or failed (occasional)
3. Processor assembly defective or requires replacement (occasional)

First check

Perform complete PMC on unit

Test point: PMC self-test
Expected: Unit passes PMC

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

No Audio Alarms patient safety

Audio alarm system is non-functional, no sound output from speaker when alarms are triggered

Ranked causes

1. Speaker defective or requires replacement (common)
2. Speaker wire harness or connection to processor board J2 disconnected or damaged (occasional)
3. Processor assembly defective or requires replacement (rare)

First check

Perform complete PMC on unit

Test point: PMC self-test
Expected: Unit passes PMC

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

Serial Port Communication Failure

Serial port unable to communicate with peripheral devices or host computer, data transfer not possible

Ranked causes

1. Peripheral cable disconnected from serial interface port or cable defective (common)
2. Peripheral or host serial port configuration settings incorrect (occasional)
3. Processor assembly defective or requires replacement (rare)

First check

Perform complete PMC on unit

Test point: PMC self-test
Expected: Unit passes PMC

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

Loss of Breathing Pressure Monitor patient safety

Breathing pressure monitor reading absent or non-functional on anesthesia machine display

Ranked causes

1. Pilot line disconnected at one or both ends or internal tubing to transducer disconnected (common)
2. Processor assembly defective or requires replacement (occasional)

First check

Perform complete PMC on unit

Test point: PMC self-test
Expected: Unit passes PMC

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

System does not pass power-up diagnostics

Machine powers up and runs diagnostics but displays CONDITIONALLY FUNCTIONAL or NON-FUNCTIONAL message instead of FUNCTIONAL; machine may not proceed to MACHINE MONITOR screen.

Ranked causes

1. Minor problem detected in diagnostics (unknown)
2. Serious problem detected in diagnostics (unknown)

First check

Review diagnostics display for FUNCTIONAL status

Test point: Diagnostics screen
Expected: All diagnostic tests show PASS; final message shows FUNCTIONAL

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

Absorber maintenance inspection caution

Preventive maintenance checklist for absorber components including valve domes, pins, discs, washers, O-rings, flow sensors, and soda lime canister condition verification

Ranked causes

1. Worn or damaged O-rings on sensor or plug assemblies (occasional)

First check

Inspect O-rings on sensor or plug assembly

Test point: Oxygen sensor or plug assembly
Expected: O-rings in good condition

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

Calibration: Battery voltage check

Verification and calibration of battery voltage output to ensure full charge and low battery cutoff parameters are within specification

Ranked causes

1. Battery voltage out of specification during AC line operation or battery operation mode (unknown)

First check

Measure battery voltage during AC line operation at full charge

Test point: TB1 terminals 1 and 2 on power supply
Expected: 12.83 to 14.18 VDC, 12.83-14.18
Tools: DMM voltmeter

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

Calibration: Display arm hinge tension

Arm does not return to approximately horizontal position when raised or lowered; or arm stays in any position when raised/lowered (over-tightened).

Ranked causes

1. Friction adjustment screw incorrectly set (common)

First check

Raise and release display arm

Test point: display arm hinge
Expected: arm returns to approximately horizontal position

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

Calibration: Machine mount joint tension

Excessive free swing at the machine mount joint where display arm connects.

Ranked causes

1. Shoulder screw not properly tightened (common)

First check

Tighten shoulder screw at machine mount joint

Test point: machine mount joint shoulder screw
Expected: torque of 75 in. lbs.
Tools: torque wrench

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

Calibration: Oxygen Monitor zero calibration patient safety

Perform zero calibration for O2 cells A and B to store baseline current readings for the oxygen monitor sensor

Ranked causes

1. Oxygen Monitor zero calibration procedure (common)

First check

Verify current cell A reading before zero calibration

Test point: CURRENT CELL A
Expected: Current value displayed on screen

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

Calibration: Remote display assembly mounting screw torque

Remote display assembly or Datagip mounting requires torque adjustment at the end of display arm.

Ranked causes

1. Remote display assembly mounting screw not properly tightened (common)

First check

Tighten remote display assembly mounting screw

Test point: remote display assembly mounting screw at end of display arm
Expected: torque of 3 to 5 foot pounds, 3 to 5 foot pounds
Tools: torque wrench

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

Canister and soda lime inspection caution

Inspection of canisters, canister gaskets, dust cup, O-ring, and soda lime condition during preventive maintenance

Ranked causes

1. Contaminated or degraded soda lime and associated components (common)

First check

Inspect canisters, gaskets, dust cup, O-ring, and soda lime

Test point: CO2 absorber components
Expected: All canisters, gaskets, dust cup, O-ring, and soda lime in good condition

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

Cm H2O gauge zero adjustment caution

Verification and adjustment of pressure gauge to zero calibration using slotted screw adjustment

Ranked causes

1. Cm H2O gauge not calibrated to zero (occasional)

First check

Verify gauge reads zero

Test point: cm H2O gauge
Expected: Gauge reads 0 cm H2O

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

Freshgas Outlet assembly inspection caution

Removal and inspection of 15-mm connector and Freshgas Outlet assembly condition

Ranked causes

1. Freshgas Outlet assembly wear or damage (occasional)

First check

Inspect Freshgas Outlet assembly condition

Test point: Freshgas Outlet assembly
Expected: Assembly in good condition

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

Inspiratory valve assembly inspection caution

Removal and inspection of inspiratory valve assembly, washer condition, and spring clip verification

Ranked causes

1. Inspiratory valve washer wear or damage (occasional)

First check

Inspect washer under inspiratory valve

Test point: Inspiratory valve
Expected: Washer in good condition

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

Low or incorrect -12VDC processor voltage high voltage

Measured -12VDC at processor board connector J15 pin 13 outside acceptable range

Ranked causes

1. Power supply voltage regulation fault or processor board fault (common)

First check

Measure -12VDC at processor board

Test point: J15-13 (Orn)
Expected: -11.64 to -12.36 VDC, -11.64 to -12.36 VDC
Tools: DMM

Low or incorrect +12VDC processor voltage high voltage

Measured +12VDC at processor board connector J15 pin 4 outside acceptable range

Ranked causes

1. Power supply voltage regulation fault or processor board fault (common)

First check

Measure +12VDC at processor board

Test point: J15-4 (Yel)
Expected: 11.76 to 12.24 VDC, 11.76 to 12.24 VDC
Tools: DMM

Low or incorrect +5VDC processor voltage high voltage

Measured +5VDC at processor board connector J15 pin 14 outside acceptable range

Ranked causes

1. Power supply voltage regulation fault or processor board fault (common)

First check

Measure +5VDC at processor board

Test point: J15-14 (Pur)
Expected: 4.85 to 5.15 VDC, 4.85 to 5.15 VDC
Tools: DMM

Low or incorrect +8VDC alarm channel voltage high voltage

Measured +8VDC at alarm channel connector J3 pin 9 outside acceptable range

Ranked causes

1. Power supply voltage regulation fault or alarm channel board fault (common)

First check

Measure +8VDC at alarm channel

Test point: J3-9 (Wht)
Expected: 7.76 to 8.24 VDC, 7.76 to 8.24 VDC
Tools: DMM

MAN/AUTO Selector Valve repacking caution

Removal, cleaning, and lubrication of Manual/Automatic selector valve channel and body with high vacuum grease if applicable

Ranked causes

1. Selector valve requires periodic repacking and lubrication for smooth operation (occasional)

First check

Remove stick shift block from selector valve body

Test point: Selector valve assembly
Expected: Block removed with four screws

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

Spiromed Sensor lubrication caution

Lubrication of Spiromed sensor lateral holes using approved sensor lubrication kit and pipette application method

Ranked causes

1. Spiromed sensor requires periodic lubrication for optimal operation (common)

First check

Inspect washer under expiratory valve

Test point: Expiratory valve
Expected: Washer in good condition

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

Ultrasonic Flow Sensor maintenance caution

Inspection and reassembly of ultrasonic flow sensor connector hose, transducers, and associated components if applicable

Ranked causes

1. Damaged or degraded ultrasonic sensor components or O-rings (occasional)

First check

Inspect connector hose, connector, and O-ring

Test point: Ultrasonic sensor connector hose
Expected: Connector hose, connector, and O-ring in good condition

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

Voltage measurement: -12VDC on processor board high voltage

Measurement of -12V power supply voltage at connector J15 pin 13 on NARKOMED 2C processor board

Ranked causes

1. Power supply failure if voltage out of range (unknown)

First check

Measure -12VDC at J15-13 using DMM

Test point: J15 connector pin 13 (Orange wire) on processor board
Expected: -11.64 to -12.36 VDC, +/-0.36 VDC
Tools: Digital multimeter (DMM)

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

Voltage measurement: +12VDC on processor board high voltage

Measurement of +12V power supply voltage at connector J15 pin 4 on NARKOMED 2C processor board

Ranked causes

1. Power supply failure if voltage out of range (unknown)

First check

Measure +12VDC at J15-4 using DMM

Test point: J15 connector pin 4 (Yellow wire) on processor board
Expected: 11.76 to 12.24 VDC, +/-0.24 VDC
Tools: Digital multimeter (DMM)

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

Voltage measurement: +5VDC on processor board high voltage

Measurement of +5V power supply voltage at connector J15 pin 14 on NARKOMED 2C processor board

Ranked causes

1. Power supply failure if voltage out of range (unknown)

First check

Measure +5VDC at J15-14 using DMM

Test point: J15 connector pin 14 (Purple wire) on processor board
Expected: 4.85 to 5.15 VDC, +/-0.15 VDC
Tools: Digital multimeter (DMM)

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

Voltage measurement: +8VDC on alarm channel high voltage

Measurement of +8V power supply voltage at connector J3 pin 9 on NARKOMED 2C alarm channel

Ranked causes

1. Power supply failure if voltage out of range (unknown)

First check

Measure +8VDC at J3-9 using DMM

Test point: J3 connector pin 9 (White wire) on alarm channel
Expected: 7.76 to 8.24 VDC, +/-0.24 VDC
Tools: Digital multimeter (DMM)

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

Error codes

Code	Meaning	Trigger	Severity
`C001`	O2 zero calibration A stored	Oxygen sensor zero reference calibration point A recorded	info
`C002`	O2 zero calibration B stored	Oxygen sensor zero reference calibration point B recorded	info
`C011`	Pressure calibration span stored	Pressure sensor span calibration recorded	info
`C012`	Pressure calibration zero stored	Pressure sensor zero calibration recorded	info
`E000`	Task create error	Real-time OS fails to create a new task thread	critical
`E002`	Task ident error	Real-time OS fails to identify task	critical
`E003`	Task start error	Real-time OS cannot start a created task	critical
`E045`	Fatal error	Unrecoverable system exception	critical
`E049`	Device initialize error	Peripheral device fails to initialize	critical
`E050`	Device open error	Device driver cannot open peripheral device	critical
`E052`	Device read error	Data read from peripheral device fails	critical
`E053`	Device write error	Write operation to device fails	critical
`E100`	PDA subsystem error	Patient data acquisition subsystem fails	critical
`E200`	CCM subsystem error	Central control module subsystem fails	critical
`E300`	DSV subsystem error	Dual scavenging valve subsystem fails	critical
`E400`	UDI subsystem error	User display interface subsystem fails	critical
`E500`	EDC subsystem error	Esophageal detector circuit subsystem fails	critical
`E600`	SYS subsystem error	General system subsystem fails	critical
`E700`	IOD subsystem error	Input/output data interface fails	critical
`E800`	SUP subsystem error	Supply/power subsystem fails	critical
`F000`	SRAM test failed	Static RAM memory test fails during self-diagnosis	critical
`F010`	Timer test failed	Timer circuit fails self-diagnostic during startup	critical
`F020`	A/D converter test failed	Analog-to-digital converter self-test fails	critical
`F030`	Primary audio test failed	Speaker or audio output circuit fails self-test	unknown
`F040`	Backup audio test failed	Backup audio circuit fails self-diagnostic	unknown
`F050`	Serial I/O test failed	Serial communication port self-test fails	critical
`F060`	Real-time clock test failed	RTC circuit fails self-diagnostic during boot	critical
`F070`	NVRAM test failed	Non-volatile RAM memory test fails during startup	critical
`HP01`	MECIF communication error	Medical equipment common interface frame/parity error	critical
`HP02`	MECIF communication lost	MECIF connection broken	critical
`HP03`	MECIF communication regained	MECIF link restored	info
`O001`	ORLK communication error	Operating room link serial data error occurs	critical
`O002`	ORLK communication lost	Operating room link connection dropped	critical
`O003`	ORLK communication regained	Operating room link restored after loss	info
`S000`	View mode accessed	Service log view function activated	info
`S001`	Installation mode accessed	Initial system installation/setup procedure begun	info
`S002`	Preventive maintenance service accessed	Preventive maintenance screen entered	info
`S003`	Service mode accessed	General service screen entered	info
`S004`	Secondary service screen entry settings	Secondary service menu accessed	info
`S005`	Service date reset	Service date/time reset by technician	info
`S006`	Service log cleared	Service event log history erased	info
`S010`	Serial number set	Equipment serial number programmed	info
`S011`	Vaporizer settings configured	Anesthesia vaporizer parameters configured	info
`S012`	Vaporizer defaults restored	Vaporizer parameters reset to factory defaults	info
`S013`	Enable protocols configured	Safety protocol settings modified	info
`S014`	Low O2 supply whistle setting changed	Low oxygen alarm parameters configured	info
`S015`	Serial ports updated	Communication port configuration modified	info
`V001`	VTLK communication error	Vaporizer telemetry link frame, overrun, or parity error	critical
`V002`	VTLK communication lost	Vaporizer telemetry link connection lost	critical
`V003`	VTLK communication regained	Vaporizer telemetry link restored after loss	info

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.