Vital signs monitors · Spot family

Welch Allyn Spot LXi: troubleshooting and error codes

The ServiceForge knowledge base holds 66 documented symptoms for the Welch Allyn Spot LXi, with 102 ranked causes, 87 diagnostic checks with test points and expected values, and 144 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Inaccurate Blood Pressure Readings patient safety

Blood pressure measurements do not match expected values or reference readings

Ranked causes

1. Incorrect blood pressure cuff size (common)
2. Patient's arm position incorrect (common)
3. Arm movement during blood pressure cycle (common)
4. Blood pressure taken over clothing (common)
5. Arrhythmia present (occasional)
6. Incorrect Korotkoff sound reference used (occasional)
7. Cuff deflated too quickly (common)
8. Sphygmomanometer not calibrated (occasional)
9. Change in blood pressure between readings (occasional)
10. Poor auscultatory sound recognition by observer (occasional)

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

SpO2 Malfunction

SpO2 measurement is not functioning or sensor not displaying reading

Ranked causes

1. Sensor in place but no reading on display (common)
2. Measurement on same extremity as blood pressure (common)
3. Sensor cable not plugged in correctly (common)
4. Wrong sensor type in use (occasional)

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

Battery voltage below specification

Battery voltage measured less than 6.0 Vdc using DMM

Ranked causes

1. Battery not fully charged (common)
2. E38 error present on Version 1 preventing charge (occasional)
3. Battery defective and will not hold charge (occasional)

First check

Set power supply to 6.5 Vdc and measure battery voltage with DMM

Test point: Battery
Expected: 6.5 Vdc nominal, +0/-0.25 Vdc
Tools: DMM

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

Blood Pressure Cuff Deflating Too Slowly

Blood pressure cuff takes excessive time to deflate during measurement cycle

Ranked causes

1. Normal operation (common)
2. Pressure preset too high (occasional)
3. Patient movement (common)

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

Blood pressure cuff inflation or deflation improper

Cuff does not inflate or deflate properly during blood pressure cycles

Ranked causes

1. Pinched tubing (common)
2. Valve failure (occasional)
3. Leak in pneumatic system (occasional)

First check

Perform 2-3 blood pressure cycles and observe cuff inflation/deflation

Test point: Blood pressure cuff
Expected: Proper cuff inflation and deflation with correct readings

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

Communication option check

Verify IR data communication port and cable connectivity.

Ranked causes

1. Communication port or cable not selected (common)
2. Obstacle blocking IR Data Interface (occasional)
3. Main PCB malfunction (rare)

First check

Verify communication settings

Test point: Tools > Options menu
Expected: Communication port and cable selected

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

Cuff Inflation and Deflation with No Blood Pressure Reading or Error Code

Blood pressure cuff inflates/deflates but no reading is displayed or error code appears

Ranked causes

1. Leak in pneumatic system (common)
2. Arm movement during cycle (common)
3. Blood pressure cuff tubing or pressure hose movement artifact (common)

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

Device does not power on

Spot Vital Signs will not turn on when power button is pressed

Ranked causes

1. Power supply not connected or not turned on (common)
2. Main PCB failure (rare)
3. Display PCB failure (rare)

First check

Verify power supply is connected and powered

Test point: Power supply connection
Expected: Power supply connected and turned on

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

Device does not power on after battery check

Spot Vital Signs fails to power on after battery voltage check confirms adequate voltage

Ranked causes

1. Power supply not connected or not turned on (common)
2. Main PCB assembly faulty (rare)
3. Display PCB assembly faulty (rare)

First check

Verify power supply is connected and powered on

Test point: Power supply connection
Expected: Power supply connected and turned on

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

Temperature Malfunction

Temperature measurement is not working or incorrect values displayed

Ranked causes

1. Error code displayed with broken probe (occasional)
2. Low temperature readings with improper probe placement (common)
3. No temperature displayed due to probe not replaced (common)

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

Battery voltage low

Battery voltage less than 6.0 Vdc when measured with DMM

Ranked causes

1. Battery not charged (common)
2. Battery does not charge correctly (E38 error on Version 1) (occasional)

First check

Measure battery voltage with DMM

Test point: Battery terminals
Expected: 6.5 Vdc nominal, +0/-0.25 Vdc
Tools: DMM

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

Blood pressure cuff inflation/deflation improper patient safety

Cuff does not inflate or deflate properly or does not complete cycles correctly

Ranked causes

1. Tubing is pinched or kinked (common)
2. Valve is faulty (occasional)

First check

Perform two or three complete blood pressure cycles and observe inflation/deflation

Test point: Cuff system
Expected: Proper cuff inflation and deflation cycles with consistent readings

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

Blood Pressure Cuff Pops Off patient safety

Blood pressure cuff detaches or comes off patient during measurement

Ranked causes

1. Inappropriate blood pressure cuff size (common)
2. Blood pressure cuff applied inside out (common)

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

Blood pressure pressure tolerance verification

Pressure readings at specified inflation levels are outside acceptable tolerance limits during verification test

Ranked causes

1. Pressure reading outside specification at 250, 150, 50, or 0 mmHg test points (common)
2. NIBP board replacement or initialization required (occasional)

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

Calibration: Blood pressure

NIBP board pressure reading out of tolerance; requires calibration adjustment using pneumatic test assembly and service software

Ranked causes

1. NIBP board not initialized or pressure reading drift (common)
2. Pressure reading requires gain adjustment (common)

First check

Verify pressure at zero and all setup conditions before calibration

Test point: Pneumatic test assembly, UUT valve, bleed screw
Expected: Pressure at zero mmHg, bleed screw closed, UUT valve in open state

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

Calibration: Blood pressure measurement

Verification that blood pressure readings are within ±3 mmHg of NIST-traceable standard across specified pressure points (0, 50, 150, 250 mmHg)

Ranked causes

1. Device requires functional verification before service return (common)
2. Pressure meter must be NIST-traceable with accuracy better than ±3 mmHg (common)

First check

Setup: attach pneumatic clamp to 100 cc and 250 cc cylinders; remove clamp from 500 cc cylinder

Test point: pneumatic cylinders
Expected: Clamps attached to 100 cc and 250 cc; 500 cc free

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

Calibration: Temperature measurement

Verification that thermometer readings are within ±0.1°C (±0.2°F) of 9600 Plus Calibration Tester set point temperature at multiple calibration set points

Ranked causes

1. Thermometer requires functional verification at three temperature set points (common)
2. Thermal accommodation required before testing (common)

First check

Wait for thermometer temperature to stabilize

Test point: thermometer display
Expected: Temperature stable for 10 seconds

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

Device Does Not Turn On

Device fails to power on

Ranked causes

1. Low battery (common)
2. Device not receiving power (common)

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

10-minute diagnostic time exceeded

Temperature measurement exceeds 10-minute diagnostic time limit

Ranked causes

1. Measurement time limit exceeded (common)

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

Ambient temperature out of range

Device detects ambient temperature outside operating range

Ranked causes

1. Ambient temperature out of range (common)

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

Back light current exceeds limit

Back light current test shows consumption above 400 mA maximum when all LCD segments and back light are turned on with SpO2 mode off

Ranked causes

1. Back light or LCD circuit drawing excessive current (unknown)

First check

Measure back light current with all LCD segments and back light on, SpO2 mode off

Test point: Battery terminals
Expected: 400 mA maximum, maximum

Blood pressure cuff overpressure condition patient safety

Blood pressure cuff pressure exceeds safe or expected limits

Ranked causes

1. Patient condition abnormal (unknown)

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

Blood Pressure Cuff Too Tight (Over Inflation) patient safety

Blood pressure cuff inflates excessively or too tightly

Ranked causes

1. Pressure preset too high (common)

First check

Verify Pressure Preset setting

Test point: internal configuration mode
Expected: 160 mmHg unless patient has hypertension

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

Blood pressure cuff tubing connection improper caution

Cuff tubing connectors not finger-tight or overtightened

Ranked causes

1. Cuff tubing connectors overtightened or loose (common)

First check

Verify cuff tubing connector tightness

Test point: Tubing connector joint
Expected: Finger-tight connection without overtightening

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

Blood pressure hose connection loose or improper

Pressure hose not fully inserted or snug fit at connector, or cuff tubing connection overtightened

Ranked causes

1. Pressure hose end not fully inserted over connector (common)

First check

Inspect pressure hose insertion at connector

Test point: Pressure hose connector on monitor
Expected: Hose completely inserted and snug

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

Broken or missing probe

Temperature probe is broken or not present

Ranked causes

1. Temperature probe broken or missing (common)

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

Calibration: Battery Removal / Power Shutdown caution

After removing UUT battery or shutting down external power supply via Battery Simulator, date and time must be reset before further testing, calibration or verification.

Ranked causes

1. Battery removal or external power supply shutdown (common)

First check

Power supply voltage before connecting UUT

Test point: external power supply output
Expected: 6.5 +/- 0.1V DC, +/- 0.1 V

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

Calibration: Blood pressure accuracy patient safety

Verify pressure measurement accuracy meets device specification using calibrated pressure meter traceable to NIST.

Ranked causes

1. Device requires calibration verification (common)

First check

Prepare calibrated pressure meter

Test point: Pressure meter
Expected: Accuracy better than ±3 mmHg, NIST traceable certification available

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

Calibration: Blood pressure system

Verify blood pressure measurement system calibration through cuff inflation/deflation cycles and reading verification

Ranked causes

1. Calibration verification required (common)

First check

Run blood pressure cycle and verify cuff inflation

Test point: Blood pressure cuff
Expected: Cuff inflates properly with appropriate pressure rise

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

Calibration: Functional verification

Procedure to confirm proper operation of Spot Vital Signs monitor and options after calibration or circuit board replacement.

Ranked causes

1. Calibration or circuit board replacement completed (unknown)

First check

Power on device

Test point: Power button
Expected: All LCD segments briefly illuminate and two beeps sound

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

Calibration: Over Pressure Detection

Verify pneumatic system can detect over pressure within specified range

Ranked causes

1. Over pressure detection out of range (unknown)

First check

Verify over pressure detection threshold

Test point: pneumatic system
Expected: detects between 296 mmHg and 329 mmHg, 296-329 mmHg

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

Calibration: SpO2 Mode Current

Verify current draw through battery terminals in SpO2 mode does not exceed specification

Ranked causes

1. SpO2 mode current exceeds maximum limit (unknown)

First check

Measure current draw in SpO2 mode minus Blank Mode Current

Test point: battery terminals
Expected: 120 mA maximum
Tools: DMM

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

Calibration: Static Pressure Detection

Verify device detects static pressure greater than 15 mmHg for extended duration

Ranked causes

1. Static pressure detection failure (unknown)

First check

Verify static pressure detection at threshold held for duration

Test point: pneumatic system
Expected: detects pressure over 15 mmHg sustained for 180 seconds
Tools: pressure gauge

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

Calibration: Temperature accuracy check

Verify SureTemp thermometer accuracy using 9600 Plus Calibration Tester

Ranked causes

1. Thermometer out of calibration (unknown)

First check

Check SureTemp thermometer accuracy

Test point: SureTemp thermometer via 9600 Plus Calibration Tester
Expected: Within calibration specification
Tools: 9600 Plus Calibration Tester

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

Calibration: Voltage reading (battery)

Verification that voltage reading meets test specifications at 5.6 Vdc

Ranked causes

1. Voltage reading requires verification at specific test voltage (common)

First check

Set power supply to test voltage

Test point: power supply output
Expected: 5.6 Vdc +0.3 / -0.0 V, +0.3 / -0.0 V

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

Device fails power-on self-test

Upon power-up, error code displayed in Navigation Window instead of normal display functions

Ranked causes

1. Internal self-check failure (unknown)

First check

Perform power-on self-test

Test point: Device power button
Expected: Display shows model and serial numbers, two audible beeps, normal display functions with blank values

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

Display interface not responding to commands

Display window does not turn on/off segments or back light when proper commands given, or buzzer does not sound when commanded

Ranked causes

1. Display or buzzer interface fault (unknown)

First check

Send command to turn on all display segments and back light

Test point: Display window
Expected: All segments and back light illuminate

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

Faulty SpO2 sensor

SpO2 sensor is defective or malfunctioning

Ranked causes

1. SpO2 sensor defective (occasional)

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

Functional check: SpO2 Masimo sensor

Verification that Masimo SpO2 sensor reads 81% ± 3% and pulse reads 61 bpm ± 1 bpm when connected to Masimo Tester

Ranked causes

1. Masimo SpO2 module (Version 2) requires functional check with Masimo Tester (common)

First check

Verify SpO2 reading with Masimo Tester connected

Test point: Spot Vital Signs Display Window
Expected: 81% ± 3%, ± 3%

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

Functional check: SpO2 Nellcor MP205 sensor

Verification that Nellcor MP205 SpO2 module reads within specifications using SRC-2 simulator at configured settings

Ranked causes

1. Nellcor MP205 SpO2 module (Version 1) requires functional check with SRC-2 simulator (common)

First check

Verify SpO2 reading matches test specification with SRC-2 simulator

Test point: Spot Vital Signs display
Expected: Per Repair Test Specification in Appendix C

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

Functional check: SpO2 Nellcor MP506 and Nell-3 sensors

Verification that Nellcor MP506 and Nell-3 SpO2 modules read within specifications using SRC-MAX simulator at two HR and SpO2 levels

Ranked causes

1. Nellcor MP506 and Nell-3 SpO2 modules require functional check with SRC-MAX simulator (common)

First check

Verify SpO2 reading matches test specification with SRC-MAX simulator

Test point: Spot Vital Signs display
Expected: Per Repair Test Specification in Appendix A

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

Internal self-check fails

Device displays an error code on startup instead of normal operating display, indicating failure of internal self-check.

Ranked causes

1. Internal self-check failure (unknown)

First check

Identify error code

Test point: Display
Expected: Error code appears on display screen

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

Internal SpO2 error

Device detects internal SpO2 measurement error

Ranked causes

1. Internal SpO2 error (occasional)

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

Loss of tissue contact

Temperature probe loses contact with patient tissue

Ranked causes

1. Improper probe positioning (common)

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

Masimo SpO2 calibration check

Verify SpO2 module accuracy using approved simulator device

Ranked causes

1. SpO2 module out of calibration (unknown)

First check

Compare SpO2 readings with simulator output

Test point: Masimo SpO2 module display
Expected: Readings match approved simulator (Fluke Biotek Index 2 or Clinical Dynamics SmartSat)
Tools: Masimo-approved SpO2 simulator (Fluke Biotek Index 2 or Clinical Dynamics SmartSat)

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

Masimo SpO2 functional check patient safety

Verify SpO2 module functionality using Masimo test equipment.

Ranked causes

1. Masimo SpO2 module requires functional verification (common)

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

Measurement was outside of device's measurement range

Vital sign measurement exceeds device measurement range

Ranked causes

1. Patient vital sign out of range (unknown)

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

Nellcor SpO2 functional check

Verify SpO2 module functionality using Nellcor simulator

Ranked causes

1. SpO2 module not functioning properly (unknown)

First check

Verify SpO2 readings with simulator

Test point: Nellcor SpO2 module display
Expected: Module displays readings and functions with SRC-MAX simulator
Tools: Nellcor SpO2 simulator (SRC-MAX)

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

No Blood Pressure Cuff Inflation

Blood pressure cuff does not inflate at all

Ranked causes

1. Connections between device and blood pressure cuff loose (common)

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

Poor print quality

Printer output shows degraded or unclear characters and patterns

Ranked causes

1. Printer batteries depleted (common)

First check

Verify printer model

Test point: Printer unit
Expected: HP IR printer compatible with Spot Vital Signs

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

Power supply voltage calibration setup caution

Set external power supply to exact voltage before connecting UUT via Battery Simulator for calibration and verification testing.

Ranked causes

1. Need to establish correct voltage source for all calibration tests (common)

First check

Measure power supply output voltage

Test point: external power supply terminals
Expected: 6.5 +/- 0.1V DC, +/- 0.1 V
Tools: DMM or voltmeter

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

Print quality poor

Printer output shows poor quality, faint, or unclear characters and patterns

Ranked causes

1. Printer batteries depleted (common)

First check

Verify printer is HP IR printer compatible with Spot Vital Signs

Test point: Printer model
Expected: HP IR printer

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

Small leak in pneumatic system caution

Pneumatic system leaks detected

Ranked causes

1. Cuff tubing or pressure hose leak (common)

First check

Inspect cuff tubing and pressure hose

Test point: Blood pressure cuff tubing and pressure hose connections
Expected: No visible leaks

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

SpO2 mode current exceeds specification

SpO2 mode current test (current less Blank Mode current) drawn through battery terminals exceeds limit

Ranked causes

1. SpO2 circuit drawing excessive current (unknown)

First check

Measure SpO2 mode current (subtract Blank Mode current from total)

Test point: Battery terminals
Expected: Within specification limit

SpO2 pulse rate out of range

SpO2 pulse rate measurement is outside acceptable range

Ranked causes

1. Patient pulse rate abnormal (unknown)

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

SpO2 time limit exceeded

SpO2 measurement duration exceeds device time limit

Ranked causes

1. Measurement time limit exceeded (common)

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

Spot LXi SpO2 module malfunction patient safety

SpO2 module not functioning properly or SpO2 and pulse readings cannot be verified against calibrated simulator

Ranked causes

1. SpO2 module hardware failure or module not adjustable (unknown)

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

Temperature calibration check

Verify thermometer accuracy using calibration tester

Ranked causes

1. SureTemp thermometer out of calibration (unknown)

First check

Compare thermometer readings with calibration tester

Test point: SureTemp thermometer display
Expected: Readings match 9600 Plus Calibration Tester output
Tools: 9600 Plus Calibration Tester

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

Temperature functional check patient safety

Verify thermometer accuracy using calibration tester.

Ranked causes

1. Temperature sensor requires functional verification (common)

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

Temperature module accuracy out of specification patient safety

Temperature module reading does not fall within accuracy limits at normal body temperature

Ranked causes

1. Temperature module calibration drift (common)

First check

Verify temperature module accuracy at normal body temperature using Cal Key

Test point: Temperature probe input
Expected: ±0.2° F of 97.3° F (36.3° C) °F, ±0.2° F
Tools: Cal Key (5200-25)

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

More symptoms

Temperature module accuracy out of tolerance
Temperature probe not displaying ORL after removal
Temperature probe not responding
Valve/pump mode current exceeds limit
Window display segments do not light up
Window display segments not lighting

6 more symptoms with ranked causes and checks are in ServiceForge. Connect ServiceForge to your AI

Error codes

Code	Meaning	Trigger	Severity
`1`	SpO2 sensor missing or disconnected	SpO2 sensor not detected at startup or during operation	error
`1000`	Err - Invalid operation in this context	Command issued when system state does not permit operation	error
`1001`	Err - Auto zero in progress	Operation attempted while auto-zero calibration active	error
`1002`	Err - Bad checksum	Data transmission checksum mismatch detected	error
`1003`	Err - Unimplemented command	Command received that is not supported by firmware	error
`1004`	Err - Buffer overflow	Input or processing buffer exceeded capacity	error
`1005`	Err - Overrun error	Data received faster than system can process	error
`1006`	Err - Wrong data count	Received data packet has incorrect number of bytes	error
`1007`	Err - FPROM erase error	Flash memory erase operation fails	critical
`1008`	Err - FPROM programming error	Flash memory write operation fails	critical
`1009`	Err - Bad Motorola record	Invalid Motorola S-record format in firmware update	error
`1010`	Err - A/D channel locked	A/D converter channel is locked and inaccessible	error
`1011`	Err - RTC not present	Real-time clock module not detected or non-functional	error
`1012`	Err - Attempt to reference nonexisting cycle	Software attempts to access undefined measurement cycle	error
`1013`	Err - Data range error	Measured or input data outside acceptable range	error
`1014`	Err - Alarm pair range error	Alarm threshold pair configuration invalid	error
`1015`	Err - No POST error to clear	Clear POST error command when no error exists	error
`1016`	Err - Can't clear this POST error	Attempt to clear a POST error that cannot be cleared	error
`1017`	Err - Command not command type	Command structure does not match expected format	error
`1018`	Err - NAK from ST3800 protocol	ST3800 protocol layer returns negative acknowledgment	error
`1019`	Err - No wireless link	Wireless communication connection not established	error
`132`	E0.5 error - No probe temperature rise during predict cycle	Probe temperature does not increase during calibration cycle	error
`133`	E0.9 error - Probe EEPROM uninitialized with bad probe gain	Probe memory contains invalid gain calibration data	error
`134`	E0.9 error - Probe EEPROM uninitialized with bad response value	Probe memory contains invalid response calibration data	error
`145`	E0.2 error - A/D measurement overrun with pulse too long	Analog-to-digital measurement takes too long at patient/environmental conditions	error
`146`	E0.2 error - A/D measurement underrun with pulse too short	Analog-to-digital measurement completes too quickly at patient/environmental conditions	error
`147`	E4.1 error - A/D measurement overrun with RCAL pulse too long	Resistance calibration A/D pulse exceeds time limit	error
`148`	E4.1 error - A/D measurement underrun with RCAL pulse too short	Resistance calibration A/D pulse completes before time threshold	error
`149`	E4.0 error - A/D measurement overrun with PTB pulse too long	Probe thermal bridge A/D pulse exceeds time limit	error
`150`	E4.0 error - A/D measurement underrun with PTB pulse too short	Probe thermal bridge A/D pulse completes before time threshold	error
`151`	E0.2 error - A/D measurement overrun with timeout	A/D measurement operation times out	error
`152`	E0.9 error - Probe EEPROM uninitialized with bad A/D calibration	Probe memory contains invalid A/D calibration data	error
`159`	bv error - Battery voltage too low	Battery voltage drops below minimum operating threshold	warning
`160`	b^ error - Battery voltage too high	Battery voltage exceeds maximum safe charging level	warning
`161`	E4.2 error - Reference power supply malfunction	Reference voltage supply circuit has failed	error
`162`	E4.8 error - Device not calibrated	System has not completed required calibration procedure	error
`163`	E4.9 error - Missing probe well	Probe well is not inserted or detected	error
`165`	E4.3 error - Device EEPROM save failure	System unable to write configuration data to EEPROM	error
`166`	E0.8 error - EEPROM CRC failure (CONFIG_TRANSFER_FAILURE)	Configuration data CRC check fails during transfer	error
`167`	E4.4 error - Device EEPROM read/save failure (CONFIG_START_FAILURE)	EEPROM initialization or read operation fails	error
`168`	E4.5 error - Device EEPROM read/save failure (CONFIG_SLAVE_ACK_FAILURE)	Slave device does not acknowledge EEPROM read/write operation	error
`169`	E4.6 error - Device EEPROM read/save failure (CONFIG_MASTER_ACK_FAILURE)	Master device does not receive acknowledgment from slave	error
`170`	E0.6 error - Probe EEPROM read failure (CONFIG_NULL_CHAR_FAILURE)	Probe EEPROM contains invalid or null character	error
`171`	71 error - Device EEPROM access failure (CONFIG_ACQUIRE_FAILURE)	System unable to acquire access to EEPROM	error
`172`	72 error - Device EEPROM access failure (CONFIG_RELEASE_FAILURE)	System unable to release EEPROM after access	error
`173`	73 error - Device EEPROM access failure (CONFIG_INVALID_PTR_FAILURE)	Invalid memory pointer during EEPROM access	error
`174`	E4.7 error - Device EEPROM initialization failure (CONFIG_INITIALIZE_FAILURE)	EEPROM initialization sequence fails	error
`175`	E0.7 error - Probe EEPROM uninitialized (CONFIG_UNINITIALIZED_PROBE)	Probe EEPROM has not been properly initialized	error
`180`	E5.0 error - Heater stuck on (ERROR_HEATER_ON)	Heater power supply remains active when disabled	error
`181`	E5.0 error - Heater stuck off (ERROR_HEATER_OFF)	Heater power supply unable to activate	error
`182`	E5.0 error - Heater on when should be off (ERROR_HEATER_VOLTAGE_HIGH_Q)	Heater voltage present when heater is commanded off	error
`183`	E5.0 error - Heater on when should be off (ERROR_HEATER_VOLTAGE_Q_HIGH_IMPEDANCE)	Heater circuit shows high impedance with heater commanded off	error
`184`	E5.0 error - Heater off when should be on (ERROR_HEATER_VOLTAGE_LOW)	Heater voltage is insufficient when heater is commanded on	error
`185`	E5.2 error - Heater hardware failsafe failure (ERROR_HEATER_FAILSAFE)	Heater safety failsafe circuit has malfunctioned	error
`2001`	Err - Host communication timeout	No response from host within expected time	error
`2002`	Err - Incorrect response header	Host response header does not match expected format	error
`2003`	Err - Incorrect response checksum	Host response data checksum mismatch	error
`2004`	Err - Too much received data	Host response contains more data than expected	error
`2005`	Err - User cancelled operation	Operator cancelled measurement or procedure	info
`2006`	Err - User paused operation	Operator paused measurement or procedure	info
`23`	Host interface error	Communication failure between temperature module and host device	error
`26`	Invalid SureTemp algorithm	Temperature algorithm validation fails	error
`29`	Battery voltage not set	Battery voltage calibration not initialized in temperature module	error
`3`	No pulse detected from SpO2 sensor	SpO2 sensor unable to detect cardiac pulse	error
`30`	Prediction algorithm not set	Prediction algorithm not initialized in temperature module	error
`31`	Ambient temperature not set	Ambient temperature calibration not initialized	error
`4`	E7 error - SpO2 communications failure	Communication error between SpO2 module and main processor	error
`5400`	Err - Problem with the printer	Printer hardware failure detected	error
`5401`	Err - Printer is not responding	Printer does not respond to print commands	error
`5402`	Err - Printer out of paper	Paper tray empty or paper level too low	warning
`5403`	Err - Printer head not closed in place	Print head is not fully closed when printing started	error
`5500`	Unknown error code	Error code not recognized by system	unknown
`5501`	Err - Battery is too low	Battery voltage drops below minimum operating level	error
`5502`	Err - Key stuck error	Physical button or key detected in stuck state	error
`5600`	Invalid ModF algorithm	ModF algorithm validation fails	critical
`5601`	Invalid ModF init code	ModF module initialization code validation fails	critical
`5602`	Invalid ModF PMode	ModF pressure mode validation fails	critical
`5603`	Invalid ModF target pressure	ModF target pressure parameter validation fails	critical
`5604`	Invalid ModF configuration	ModF module configuration validation fails	critical
`6`	C8 error - Defective or bad SpO2 sensor	SpO2 sensor self-test fails or reading invalid	error
`A^!`	Device outside operating temperature range	Ambient temperature below minimum operating specification	warning
`Av!`	Device outside operating temperature range	Ambient temperature above maximum operating specification	warning
`b^`	Battery voltage over maximum	Battery voltage exceeds algorithm maximum value	error
`bv`	Battery voltage under minimum	Battery voltage falls below algorithm minimum value	error
`C01`	User abort	User initiated abort during measurement cycle	info
`C02`	Auto zero failure	System cannot bleed pressure below 9 mmHg or auto zero fails	warning
`C03`	Blood pressure inflation too rapid	Cuff inflation occurred too quickly	warning
`C04`	Major air leak or could not reach target pressure	Excessive inflation time or pressure cannot reach target	warning
`C04`	Excessive blood pressure inflation time	Cuff inflation took longer than expected	warning
`C05`	Excessive arm movement, cycle took too long, or measurement noise/range errors	Patient movement, cuff placement, measurement algorithm errors	warning
`C06`	Reinflation needed or measurement out of range	Measurement outside device measurement range or high heart rate	warning
`C07`	Auto cycle skipped	System busy or NIBP measurement reached too soon	warning
`C12`	Ambient temperature out of range	Temperature at probe well exceeds operating specification	warning
`C13`	Battery failure	Battery voltage insufficient	error
`C20`	Broken or missing temperature probe	Probe not detected or not functional	error
`C22`	10-minute diagnostic time exceeded	Temperature measurement duration exceeds 10 minutes	warning
`C6`	SpO2 pulse rate out of range	Pulse rate detected by SpO2 sensor outside range	warning
`C8`	Faulty SpO2 sensor	SpO2 sensor not functioning properly	error
`C9`	SpO2 time limit exceeded	SpO2 measurement duration exceeds device limit	warning
`Comm LED Amber`	A wireless TCP connection is established but no physical serial connection is detected.	Wireless active but no serial cable attached	warning
`Comm LED Blinking Green`	A wireless TCP session is established, a physical serial connection is detected, and the Bridge is transmitting or receiving data across the wired serial port.	Normal operation with active data transfer	info
`Comm LED Blinking Red`	A physical serial connection was detected and there is serial traffic present on that connection, but no wireless TCP session is established.	Serial activity without wireless connection	error
`Comm LED Green`	A wireless TCP session is established, a physical serial connection is detected, but there is no active data movement across the wired serial port.	Normal operation without active data transfer	info
`Comm LED Off`	No power or no wireless TCP session is established and no physical serial connection is detected.	Power loss or both connections missing	critical
`Comm LED Red`	No wireless TCP session is established; a physical connection is detected.	Wireless connection lost but serial cable present	error
`E0.0-E9.9`	Temperature module malfunction	Fault detected in temperature module (range E0.0 through E9.9)	error
`E0.1`	Excessive heater energy	Temperature probe heater consumes excessive power during measurement	error
`E0.2`	Ambient temperature out of range low	Ambient temperature below operating range	error
`E0.3`	Ambient temperature out of range high	Ambient temperature above operating range	error
`E0.4`	Probe over temperature	Probe temperature exceeds 112°F (44.4°C)	error
`E10`	Error during event log pressure recording	Pressure reading event logged	error
`E10`	Overpressure	Pressure exceeds safe operating limits during measurement	error
`E10`	Over-pressure condition detected	Pressure applied to device exceeds safe operating threshold	warning
`E11`	Internal safety violation	Internal safety system detected violation	critical
`E11`	Malfunction or residual pressure issue	General malfunction or residual pressure remains after measurement	error
`E20`	A/D converter failure	Missed A/D sample or A/D timeout during measurement	critical
`E20-E50`	General internal malfunction	General internal malfunction (range E20 through E50)	error
`E30`	FPROM checksum error	Firmware memory checksum verification fails during POST	critical
`E31`	RAM test failure	RAM memory test fails during POST	critical
`E32`	Factory EEPROM checksum error	Factory EEPROM memory checksum verification fails during POST	critical
`E33`	User EEPROM checksum error	User EEPROM memory checksum verification fails during POST	critical
`E34`	A/D converter failure	A/D converter hardware test fails during POST	critical
`E35`	SpO2 module failure	SpO2 module hardware test fails during POST	critical
`E36`	Diatek module failure	Diatek module hardware test fails during POST	critical
`E37`	Printer problem	Printer hardware test fails during POST	critical
`E38`	Real time clock failure	Real time clock hardware test fails during POST	error
`E38`	Battery charging failure on Version 1	Battery does not charge correctly	warning
`E39`	No calibration signature	Device calibration signature not found in memory during POST	critical
`E40`	Bad NIBP calibration record	NIBP calibration data invalid or corrupted during POST	critical
`E41`	Stepper valve bad	Stepper valve hardware test fails during POST	critical
`E42`	Internal communications error	8-bit substitute for 16-bit error during communication	error
`E43`	Error log checksum error	Error log memory checksum verification fails during POST	critical
`E44`	POST queue full	POST diagnostic queue exceeds capacity	critical
`E7`	Internal SpO2 error	Device detects internal SpO2 measurement fault	error
`Err`	Too many reinflates	NIBP measurement requires excessive reinflation cycles	error
`Link LED Green`	Wireless network and MAC have associated with an Access Point.	Successful connection established	info
`Link LED Off`	Bridge is not receiving power.	Power supply disconnected or failed	critical
`Link LED Red`	Bridge is searching for an Access Point.	Startup or lost connection to Access Point	warning
`NIBP NOT AVAILABLE`	NIBP measurement not available	NIBP module or probe malfunction	error
`P`	Loss of tissue contact for temperature measurement	Probe loses contact with patient tissue	warning
`Power LED Amber`	Bridge passed its POST but is not configured for wireless communication.	Incomplete wireless configuration	warning
`Power LED Green`	Bridge passed its POST and is configured for wireless communication.	Normal operation	info
`Power LED Off`	Bridge is not receiving power.	Power supply disconnected or failed	critical
`Power LED Red`	Bridge failed its Power On Self Test (POST) and is not configured for wireless communication.	POST failure during startup	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.