Patient monitors · Vitalert family

Dräger Vitalert 2000: troubleshooting and error codes

The ServiceForge knowledge base holds 51 documented symptoms for the Dräger Vitalert 2000, with 143 ranked causes, 186 diagnostic checks with test points and expected values, and 67 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Strip chart recorder will not print

Strip chart recorder does not produce output when commanded to print

Ranked causes

1. Strip chart recorder cables J4 and J6 not connected (common)
2. Keypad buttons not functioning properly (common)
3. Defective J6 ribbon cable (occasional)
4. Defective keypad assembly (occasional)
5. Defective strip chart recorder (occasional)
6. Defective processor board (rare)

First check

Verify J4 and J6 strip chart recorder cables are connected

Test point: J4 and J6 connectors
Expected: Both cables connected on both ends

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

Vitalert 2000 is performing intermittent resets patient safety

Unit unexpectedly restarts or resets during operation

Ranked causes

1. J2 and J3 power cables disconnected from processor board (common)
2. Defective J2 and J3 power supply cables (occasional)
3. Defective power supply assembly (occasional)
4. Defective strip chart recorder (occasional)
5. Defective processor board (occasional)
6. Host machine interface issue (occasional)

First check

Verify J2 and J3 power cables are connected to processor board

Test point: J2 and J3 connectors on Processor Board
Expected: Both cables connected

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

Waveform is missing from display screen patient safety

Display screen does not show expected waveform output

Ranked causes

1. DAU cables not correctly attached to test simulator (common)
2. External DAU cables not connected to DAU (common)
3. J1 DAU/PCB ribbon cable not attached on both ends (common)
4. J1 DAU/PCB ribbon cable defective (occasional)
5. Defective DAU assembly (occasional)
6. Defective processor board (rare)

First check

Verify all DAU cables are correctly attached to test simulator

Test point: DAU test simulator connectors
Expected: All cables correctly attached

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

CRT blank upon system power-up

Display screen shows no image when unit is powered on

Ranked causes

1. CRT ribbon cable disconnected (common)
2. CRT cable faulty (occasional)
3. CRT assembly failure (occasional)
4. Power supply assembly failure (occasional)
5. Processor board failure (occasional)

First check

Verify AC power connection

Test point: AC receptacle
Expected: Unit plugged into live AC receptacle

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

ECG status shows disconnected patient safety

Status display shows ECG DISCONNECTED

Ranked causes

1. External ECG cable not connected (common)
2. J1 DAU/PCB ribbon cable not connected on both ends (common)
3. J1 DAU/PCB ribbon cable defective (occasional)
4. Defective DAU assembly (occasional)
5. Defective processor board (rare)

First check

Verify external ECG cable is connected

Test point: External ECG cable connector
Expected: Cable connected

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

P1 or P2 status shows disconnected patient safety

Status display shows P1/P2 DISCONNECTED

Ranked causes

1. External P1/P2 cable not connected (common)
2. J1 DAU/PCB ribbon cable not connected on both ends (common)
3. J1 DAU/PCB ribbon cable defective (occasional)
4. Defective DAU assembly (occasional)
5. Defective processor board (rare)

First check

Verify external P1/P2 cable is connected

Test point: External P1/P2 cable connector
Expected: Cable connected

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

T1 or T2 status shows disconnected patient safety

Status display shows T1/T2 DISCONNECTED

Ranked causes

1. External T1/T2 cable not connected (common)
2. J1 DAU/PCB ribbon cable not connected on both ends (common)
3. J1 DAU/PCB ribbon cable defective (occasional)
4. Defective DAU assembly (occasional)
5. Defective processor board (rare)

First check

Verify external T1/T2 cable is connected

Test point: External T1/T2 cable connector
Expected: Cable connected

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

AC power test fails at power-up caution

System fails diagnostic AC power test upon initial power-up; system may not boot or function

Ranked causes

1. Power cable disconnected or faulty (common)
2. Cables J2 or J3 disconnected from power supply or processor board (common)
3. Processor board faulty (occasional)
4. Power supply assembly faulty (occasional)

First check

Verify unit is plugged into live AC receptacle and powered on

Test point: AC receptacle connection
Expected: Unit energized and test initiated

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

Communications status shows faulted

Status display shows COMMUNICATIONS FAULTED

Ranked causes

1. J1 DAU/PCB ribbon cable not connected on both ends (common)
2. J1 DAU/PCB ribbon cable defective (occasional)
3. Defective DAU assembly (occasional)
4. Defective processor board (rare)

First check

Verify J1 DAU/PCB ribbon cable is connected on both ends

Test point: J1 connector
Expected: Both ends connected

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

DAU/main board status shows disconnected caution

DAU (data acquisition unit) or main board reports disconnected status; J1 ribbon cable connection faulty or board not detected

Ranked causes

1. J1 ribbon cable not connected or loose connection (common)
2. J1 ribbon cable faulty or damaged (occasional)
3. Processor board connection port faulty (occasional)
4. DAU assembly faulty or connector defective (occasional)

First check

Check DAU/main board status display message

Test point: Status display
Expected: Status shows connected; not DISCONNECTED

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

On/Standby keypad status shows disconnected

Status display shows ON/STBY KEYPAD DISCONNECTED

Ranked causes

1. ON/Standby keypad flex cable not connected to J10 (common)
2. ON/Standby keypad connector unplugged from J10 (common)
3. Defective ON/Standby keypad assembly (occasional)
4. Defective processor board (rare)

First check

Verify ON/Standby flex cable is connected to J10

Test point: J10 on Processor Board
Expected: Cable connected on both ends

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

Power supply status shows disconnected caution

Power supply assembly reports disconnected status; J2 ribbon cable connection faulty or power supply module not detected

Ranked causes

1. J2 ribbon cable not connected or loose connection (common)
2. J2 ribbon cable faulty or damaged (occasional)
3. Processor board connection port faulty (occasional)
4. Power supply assembly faulty or connector defective (occasional)

First check

Check power supply status display message

Test point: Status display
Expected: Status shows connected; not DISCONNECTED

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

Reserve power test fails at power-up caution

System fails diagnostic reserve (battery backup) power test upon initial power-up; backup power system non-functional

Ranked causes

1. Battery not charged; CB1 or CB2 disabled (common)
2. Cables J2 or J3 disconnected (common)
3. Processor board faulty (occasional)
4. Power supply assembly faulty (occasional)

First check

Verify unit is plugged into live AC receptacle

Test point: AC receptacle
Expected: Unit powered on

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

SCR data status shows disconnected

Status display shows SCR DATA DISCONNECTED

Ranked causes

1. J6 ribbon cable not connected on both ends (common)
2. Strip chart recorder not properly seated (common)
3. Defective strip chart recorder (occasional)
4. Defective processor board (rare)

First check

Verify J6 ribbon cable is connected on both ends

Test point: J6 connector
Expected: Both ends connected

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

SCR keypad status shows disconnected

Status display shows SCR KEYPAD DISCONNECTED

Ranked causes

1. SCR keypad flex cable not connected to J9 (common)
2. SCR keypad connector unplugged from J9 (common)
3. Defective SCR keypad assembly (occasional)
4. Defective processor board (rare)

First check

Verify SCR keypad flex cable is connected to J9

Test point: J9 on Processor Board
Expected: Cable connected on both ends

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

SCR power status shows disconnected

Status display shows SCR POWER DISCONNECTED

Ranked causes

1. J4 power cable not connected to processor board (common)
2. Strip chart recorder not properly seated (common)
3. Defective strip chart recorder (occasional)
4. Defective processor board (rare)

First check

Verify J4 power cable is connected to processor board

Test point: J4 on Processor Board
Expected: Cable connected

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

Soft keypad status shows disconnected

Status display shows SOFT KEYPAD DISCONNECTED

Ranked causes

1. Soft keypad connector not plugged into J8 (common)
2. Soft keypad cable disconnected from processor board (common)
3. Defective soft keypad assembly (occasional)
4. Defective processor board (rare)

First check

Check if soft keypad connector is plugged into J8

Test point: J8 on Processor Board
Expected: Keypad plugged in

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

AC line voltage out of specification high voltage

Measured AC line voltage does not meet specifications; supply may be unstable or unit unable to regulate

Ranked causes

1. Unit not plugged into live AC receptacle or receptacle voltage out of range (common)
2. Processor board voltage regulator faulty (occasional)
3. Power supply assembly faulty or out of regulation (occasional)

First check

Verify unit is plugged into live AC receptacle

Test point: AC wall outlet
Expected: Unit powered on and AC line measurement available

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

ANALOG TEST fails upon system power-up

Analog test fails during system self-test on power-up

Ranked causes

1. Power supply voltages out of specification (common)
2. Processor board cable disconnected (common)
3. Processor board failure (occasional)

First check

Remove unit cover

Test point: Unit cover
Expected: Cover removed per Procedure 4.1

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

Battery voltage out of specification caution

Measured battery backup voltage does not meet specification; battery may be discharged, defective, or charging circuit faulty

Ranked causes

1. Battery depleted; CB1 or CB2 disabled or not charged (common)
2. Processor board charging circuit faulty (occasional)
3. Power supply assembly battery charging circuit faulty (occasional)

First check

Check if battery requires charging; enable CB1 and CB2

Test point: Charger enable switches
Expected: CB1 and CB2 enabled

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

CB battery voltage out of specification caution

Circuit breaker backup battery voltage does not meet specification; CB battery may be depleted, defective, or charging circuit faulty

Ranked causes

1. CB battery depleted; CB1 or CB2 disabled or insufficient charge (common)
2. Processor board CB charging circuit faulty (occasional)
3. Power supply assembly CB charging circuit faulty (occasional)

First check

Check if CB battery requires charging; enable CB1 and CB2

Test point: Charger enable switches
Expected: CB1 and CB2 enabled

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

DAU communication faulted caution

System Status Screen DAU Status shows FAULTED instead of NORMAL

Ranked causes

1. DAU/Main Board ribbon cable loose or damaged (common)
2. DAU faulty (occasional)
3. Processor board faulty (occasional)

First check

Review System Status Screen DAU Status line

Test point: DAU Status
Expected: NORMAL

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

Keyboard key not responding

During Keyboard Test Screen operation, pressing a key does not illuminate corresponding key on display

Ranked causes

1. Keypad switch defective (common)
2. Keyboard setup incorrect (occasional)
3. Processor board defect (rare)

First check

Run Keyboard Test Screen on all keys

Test point: Keyboard keys
Expected: Each pressed key illuminates on display

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

Raw DC voltage out of specification high voltage

Unregulated DC voltage from power supply does not meet specification; power supply primary output faulty or unstable

Ranked causes

1. Unit not plugged into live AC receptacle or AC voltage out of range (common)
2. Processor board voltage regulator faulty (occasional)
3. Power supply assembly primary rectifier or filter faulty (occasional)

First check

Verify unit is plugged into live AC receptacle

Test point: AC wall outlet
Expected: Unit powered on

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

Regulated +12V output out of specification caution

12-volt regulated supply voltage does not meet specification; analog supply may be low or unstable

Ranked causes

1. Unit not plugged into live AC receptacle or AC voltage out of range (common)
2. Processor board +12V regulator faulty (occasional)
3. Power supply assembly +12V output faulty (occasional)

First check

Verify unit is plugged into live AC receptacle

Test point: AC wall outlet
Expected: Unit powered on

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

Regulated +5V output out of specification caution

5-volt regulated supply voltage does not meet specification; logic supply may be low or unstable, affecting system operation

Ranked causes

1. Unit not plugged into live AC receptacle or AC voltage out of range (common)
2. Processor board +5V regulator faulty (occasional)
3. Power supply assembly +5V output faulty (occasional)

First check

Verify unit is plugged into live AC receptacle

Test point: AC wall outlet
Expected: Unit powered on

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

AUDIO TEST PRIMARY or BACKUP fails upon system power-up

Primary or backup audio test fails during system self-test on power-up

Ranked causes

1. Primary speaker cable disconnected (common)
2. Processor board failure (occasional)

First check

Remove unit cover

Test point: Unit cover
Expected: Cover removed per Procedure 4.1

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

BACKUP MEMORY TEST fails upon system power-up

Backup memory test fails during system self-test on power-up

Ranked causes

1. Processor board cable disconnected (common)
2. Processor board failure (occasional)

First check

Remove unit cover

Test point: Unit cover
Expected: Cover removed per Procedure 4.1

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

Battery voltage low or insufficient high voltage

Battery fails to charge to full capacity or voltage drops below acceptable operating range during battery operation

Ranked causes

1. Battery not fully charged (common)
2. Charging circuit failure (occasional)

First check

Measure battery voltage at full charge

Test point: black and orange wires from battery pack with J3 disconnected
Expected: ≥18.0 VDC, ≥
Tools: DMM

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

CLOCK TEST fails upon system power-up

Clock test fails during system self-test on power-up

Ranked causes

1. Processor board cable disconnected (common)
2. Processor board failure (occasional)

First check

Remove unit cover

Test point: Unit cover
Expected: Cover removed per Procedure 4.1

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

FIRMWARE TEST fails upon system power-up

Firmware test fails during system self-test on power-up

Ranked causes

1. Processor board cable disconnected (common)
2. Processor board failure (occasional)

First check

Remove unit cover

Test point: Unit cover
Expected: Cover removed per Procedure 4.1

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

Internal cable disconnected caution

System Status Screen shows Internal Cable Status DISCONNECTED for processor board or module connections

Ranked causes

1. Cable loose or not fully seated (common)
2. Cable damaged (occasional)

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

Keyboard key does not respond

Keyboard TEST shows diagrammed key does not light when actual key is pressed

Ranked causes

1. Keypad defective or connector loose (common)
2. Keypad type mismatch in configuration (occasional)

First check

Run KEYBOARD TEST and verify each key responds

Test point: CRT KEYBOARD TEST screen diagram
Expected: Each diagrammed key lights while corresponding actual key is pressed

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

Main keypad status shows disconnected caution

Main keypad assembly reports disconnected status; J7 connector connection faulty or keypad assembly not detected

Ranked causes

1. New keypad not plugged into J7 on processor board (common)
2. Processor board J7 connector faulty (occasional)

First check

Check main keypad status display message

Test point: Status display
Expected: Status does not show DISCONNECTED

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

MEMORY TEST fails upon system power-up

Memory test fails during system self-test on power-up

Ranked causes

1. Processor board cable disconnected (common)
2. Processor board failure (occasional)

First check

Remove unit cover

Test point: Unit cover
Expected: Cover removed per Procedure 4.1

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

Patient cable disconnected caution

System Status Screen External Cable Status shows DISCONNECTED for ECG, P1, P2, T1, or T2 when cable is physically connected

Ranked causes

1. Cable connector problem (common)
2. DAU input fault (occasional)

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

Primary speaker status shows disconnected caution

Primary speaker assembly reports disconnected status; J15 wire harness connection faulty or speaker not detected

Ranked causes

1. J15 wire harness not connected to processor board (common)
2. Processor board speaker connector faulty (occasional)

First check

Check primary speaker status display message

Test point: Status display
Expected: Status does not show DISCONNECTED

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

SERIAL I/O TEST fails upon system power-up

Serial I/O test fails during system self-test on power-up

Ranked causes

1. Processor board cable disconnected (common)
2. Processor board failure (occasional)

First check

Remove unit cover

Test point: Unit cover
Expected: Cover removed per Procedure 4.1

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

TIMER TEST fails upon system power-up

Timer test fails during system self-test on power-up

Ranked causes

1. Processor board cable disconnected (common)
2. Processor board failure (occasional)

First check

Remove unit cover

Test point: Unit cover
Expected: Cover removed per Procedure 4.1

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

Battery pack replacement high voltage

Battery pack made up of three 6-volt rechargeable batteries connected in series, located on power supply assembly, held by retainer bracket

Ranked causes

1. Battery pack end-of-life or failure (unknown)

First check

Verify battery voltage is within allowable tolerance

Test point: System Status Screen in Service Diagnostics Menu
Expected: Within allowable tolerance

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

Battery voltage out of range caution

System Status Screen shows BATTERY or CB BATTERY voltage outside 18.5-22 VDC range

Ranked causes

1. Battery depleted or faulty (unknown)

First check

Read BATTERY voltage from System Status Screen

Test point: BATTERY
Expected: 18.5 - 22 VDC, 18.5-22

1 more check with pass and fail actions are in ServiceForge. Connect ServiceForge to your AI

CRT display geometry incorrect

CRT GEOMETRY screen shows display lines not properly aligned or image distorted

Ranked causes

1. CRT geometry requires adjustment (occasional)

First check

Verify CRT geometry is correct

Test point: CRT GEOMETRY test screen display
Expected: Display properly aligned with no distortion, straight lines, correct convergence

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

DAU status not normal

System Status screen shows DAU STATUS not listed as NORMAL

Ranked causes

1. Data acquisition unit malfunction or communication error (occasional)

First check

Verify DAU status is normal

Test point: System Status screen DAU STATUS field
Expected: NORMAL

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

External cables incorrectly marked as connected

System Status screen shows EXTERNAL CABLE STATUS entries not labeled DISCONNECTED when they should be

Ranked causes

1. External cable connected during service verification (common)

First check

Verify all external cables are disconnected

Test point: System Status screen EXTERNAL CABLE STATUS section
Expected: All entries labeled DISCONNECTED

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

Internal cable connections not recognized

System Status screen shows INTERNAL CABLE STATUS entries not labeled CONNECTED

Ranked causes

1. Internal cable disconnected or loose (common)

First check

Verify all internal cables are connected

Test point: System Status screen INTERNAL CABLE STATUS section
Expected: All entries labeled CONNECTED

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

Power supply voltage out of range high voltage

System Status Screen shows AC LINE, BATTERY, CB BATTERY, RAW DC, REGULATED +5, or REGULATED +12 outside acceptable ranges

Ranked causes

1. AC input voltage out of range (unknown)

First check

Read AC LINE voltage from System Status Screen

Test point: AC LINE
Expected: 90-130 VAC, 90-130

Raw DC voltage out of range high voltage

System Status Screen shows RAW DC outside 18-35 VDC range

Ranked causes

1. Power supply regulation failure (unknown)

First check

Read RAW DC voltage from System Status Screen

Test point: RAW DC
Expected: 18 - 35 VDC, 18-35

Regulated +12V out of range caution

System Status Screen shows REGULATED +12 outside 11.0-12.4 VDC range

Ranked causes

1. Power supply regulation circuit failure (unknown)

First check

Read REGULATED +12 voltage from System Status Screen

Test point: REGULATED +12
Expected: 11.0 - 12.4 VDC, 11.0-12.4

Regulated +5V out of range caution

System Status Screen shows REGULATED +5 outside 4.8-5.2 VDC range

Ranked causes

1. Power supply regulation circuit failure (unknown)

First check

Read REGULATED +5 voltage from System Status Screen

Test point: REGULATED +5
Expected: 4.8 - 5.2 VDC, 4.8-5.2

Unit does not boot or software version not displayed

After power-on, software version not shown in upper right of CRT or diagnostics do not show PASS status

Ranked causes

1. Power supply voltages out of specification (common)

First check

Plug unit into grounded 120 VAC outlet and power on

Test point: Main power inlet
Expected: Unit powers on

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

VIDEO TEST fails upon system power-up

Video test fails during system self-test on power-up

Ranked causes

1. Processor board failure (common)

First check

Remove unit cover

Test point: Unit cover
Expected: Cover removed per Procedure 4.1

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

Error codes

Code	Meaning	Trigger	Severity
`A/D CONVERTER FAIL`	Analog-to-digital converter circuit failure	Power-up self-diagnostic test or error log detection	error
`AUDIO CIRCUIT FAIL`	Audio amplifier or speaker driver circuit failure	Power-up self-diagnostic or error log	error
`BACKUP MEMORY FAIL`	Non-volatile backup memory (NVRAM) failure	Power-up self-diagnostic or error log	error
`BACKUP SPEAKER FAIL`	Backup audio speaker circuit failure	Power-up self-diagnostic or error log	warning
`bad Alloc_Seg`	Memory allocation segment error	Runtime memory management error	error
`Bad DAU Checksum`	Data Acquisition Unit checksum mismatch	DAU communication verification during startup or operation	error
`BAD FONT SET`	Display font data corruption or missing	Display initialization error	error
`bad Free_Seg`	Memory free segment allocation error	Runtime error detection	error
`BAD Time CLOCK`	Real-time clock initialization or data error	Power-up self-diagnostic	error
`BATTERY DISCONNECT`	Battery not properly connected or failed	Power-up detection or during operation	error
`CIRCUIT BREAKER OPEN`	Internal circuit breaker has tripped	Overcurrent or fault detection	critical
`CONFIG EVENT NOT RECOGNIZED`	Unrecognized configuration event detected	Configuration parsing during startup	warning
`DATA Didnt SPAWN`	Data processing thread failed to start	Startup or runtime thread management error	error
`DAU Calibration Error`	DAU calibration data missing or invalid	Calibration data verification during startup	error
`DAU Calibration Error`	Invalid calibration sequence entered during manual calibration	User enters incorrect sequence during manual DAU calibration	error
`DAUC Didnt Activate`	DAU controller failed to initialize	DAU controller startup failure	error
`DAU Didnt Communicate`	Data Acquisition Unit communication failure	DAU command/response timeout during operation	error
`DAU Power Up Test Failure`	DAU self-test failed during power-up	DAU initialization sequence failure	error
`DAU Stopped Responding`	DAU communication timeout or lockup	DAU fails to respond to commands during operation	critical
`DISP Didnt SPAWN`	Display driver thread failed to start	Display initialization failure	error
`DTST Didnt Activate`	Diagnostic self-test thread activation failed	Self-test startup sequence error	warning
`FIRMWARE FAIL`	Firmware integrity or execution error	Firmware CRC check or runtime error	critical
`LEAD sequence`	ECG lead sequencing error	Lead configuration or sensing failure	warning
`Lower Window Creation Error`	Display window creation failure in lower region	Display initialization during startup	error
`Main SPEAKER FAIL`	Primary audio speaker circuit failure	Power-up self-diagnostic or error log	error
`MFP 10 ms TIMER FAIL`	10-millisecond timer circuit failure	Timer verification during operation	error
`MFP 5ms TIMER FAIL`	5-millisecond timer circuit failure	Timer verification during startup	error
`MFP BUS FAIL`	Main processor bus communication failure	Bus arbitration or transaction error	critical
`NOT CONFIGDN EVENT`	Event configuration not complete or recognized	Configuration event parsing error	warning
`NO TIME`	System time not set or retrieved	Time/date query error on startup	warning
`PRS1 Didnt Activate`	Pressure sensor 1 failed to initialize	Pressure sensor startup failure	error
`PRS1 Didnt SPAWN`	Pressure sensor 1 thread failed to start	Sensor thread creation failure	error
`PRS2 Didnt SPAWN`	Pressure sensor 2 thread failed to start	Sensor thread creation error	error
`PRSK Didnt Activate`	Pressure sensor keyboard interface failed	Sensor input interface initialization error	error
`RAM HIGH BYTE FAIL`	Highest RAM byte test failure	RAM integrity self-test during startup	critical
`RAM LOWEST BYTE FAIL`	Lowest RAM byte test failure	RAM self-test during power-up	critical
`RAM M-HIGH BYTE FAIL`	Middle-high RAM byte test failure	RAM self-test during power-up	critical
`RAM M-LOW BYTE FAIL`	Middle-low RAM byte test failure	RAM integrity verification during startup	critical
`REAL TIME CLOCK FAIL`	Real-time clock hardware failure	RTC verification during power-up	error
`ROM CRC`	ROM cyclic redundancy check failure	Firmware integrity verification at startup	critical
`ROM Memory Failure`	ROM read or write failure	ROM access error during operation or startup	critical
`SOFTWARE EXCEPTION`	Unhandled software exception or fault	Runtime processor exception during operation	critical
`start cal mode`	Calibration mode start command issued	Operator or firmware calibration initiation	info
`stop_cal`	Calibration mode stop command issued	Calibration procedure completion or abort	info
`stop_comm`	Communication shutdown command issued	Operator or system communication termination	info
`TRAX CREATE ERROR`	TRAX subsystem thread creation failure	TRAX initialization error during startup	error
`TRAX Too Many Messages`	Message queue overflow in TRAX subsystem	Message buffer saturation during operation	warning
`TRAX Unusable`	TRAX subsystem non-functional or not responding	TRAX health check failure during operation	error
`UART DAU RX INT FAIL`	UART DAU receive interrupt failure	Serial interrupt handling error	error
`UART MFP COMM FAIL`	UART main processor communication failure	Serial port timeout or data error	error
`UART PORT A FAIL`	UART port A communication failure	Port A timeout or transaction error	error
`UART PORT B FAIL`	UART port B communication failure	Port B timeout or data error	error
`UART PORT C FAIL`	UART port C communication failure	Port C timeout or transaction failure	error
`UART PORT D FAIL`	UART port D communication failure	Port D timeout or protocol error	error
`UART PORT E FAIL`	UART port E communication failure	Port E timeout or data transaction error	error
`UART PORT F FAIL`	UART port F communication failure	Port F timeout or transmission error	error
`UART PORT G FAIL`	UART port G communication failure	Port G timeout or reception error	error
`UART PORT H FAIL`	UART port H communication failure	Port H timeout or transaction failure	error
`UART SIO PORT FAIL`	UART SIO port communication failure	Serial port timeout or protocol error	error
`Unspecified DAU Error`	Data Acquisition Unit error of unknown type	DAU reports error without specific code	error
`Upper Window Creation Error`	Display window creation failure in upper region	Display initialization error during startup	error
`VID CONTROLLER FAIL`	Video controller chip failure	Video initialization error during power-up	error
`VRAM HIGH NIBLE FAIL`	Video RAM high nibble test failure	VRAM self-test during startup	error
`VRAM LOW NIBLE FAIL`	Video RAM low nibble test failure	VRAM integrity verification during power-up	error
`WD TIMEOUT`	Watchdog timer timeout occurred	Watchdog counter not reset within time limit	critical
`write cal quit`	Calibration data write cancelled	Calibration abort or write error	warning
`write failed`	Memory write operation failed	RAM or ROM write error during operation	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.