Patient monitors · VS30 family

Philips EarlyVue VS30: troubleshooting and error codes

The ServiceForge knowledge base holds 67 documented symptoms for the Philips EarlyVue VS30, with 139 ranked causes, 79 diagnostic checks with test points and expected values, and 150 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Monitor does not power on with AC power high voltage

Device turns on with battery but not when connected to AC mains

Ranked causes

1. AC power cord unplugged (common)
2. AC power cord broken (common)
3. Fuse is blown (occasional)
4. Power supply cable malfunctioned (occasional)
5. Power supply malfunctioned (occasional)
6. AC power connector malfunctioned (occasional)
7. Main board malfunctioned (rare)

First check

Verify AC power cord connection

Test point: AC outlet
Expected: Power cord plugged in

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

Temperature measurements not displayed patient safety

Temperature probe readings do not appear on monitor screen

Ranked causes

1. Probe disconnected from monitor (common)
2. Probe misplaced (common)
3. Predictive temperature out of range (occasional)
4. Probe malfunctioned (occasional)
5. Front end malfunction (rare)
6. Temperature module malfunctioned (rare)
7. Main board malfunctioned (rare)

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

Monitor does not power on with battery patient safety

Device turns on with AC power but fails to start on battery power

Ranked causes

1. Battery not charged (common)
2. Battery or connector loose (common)
3. Battery end of life (occasional)
4. Battery interface board no connection (rare)
5. Main board malfunctioned (rare)

First check

Verify battery charge level

Test point: Battery status indicator
Expected: Battery fully charged

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

NBP measurements not displayed patient safety

Blood pressure readings do not appear on monitor screen

Ranked causes

1. Wrong cuff size or incorrect cuff placement (common)
2. Initial pressure setting incorrect (common)
3. Air tube bent, twisted, or leaking (occasional)
4. External problem (occasional)
5. NBP module error (rare)

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

Nurse call function does not signal alarm conditions patient safety

Nurse call system does not trigger or signal when alarm conditions occur

Ranked causes

1. Minimum Nurse Call Alarm Priority set too high (common)
2. Alarm audio turned off (common)
3. Phono connector loose or broken (occasional)
4. IO board malfunctioned (occasional)
5. Main board malfunctioned (rare)

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

Recorder does not print caution

Recorder does not produce output or prints are blank

Ranked causes

1. Recorder out of paper (common)
2. Recorder door is open (common)
3. System does not recognize recorder (occasional)
4. Recorder module malfunctioned (occasional)
5. Main board malfunctioned (rare)

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

SpO2 measurements not displayed patient safety

Oxygen saturation readings do not appear on monitor screen

Ranked causes

1. SpO2 module in learning phase (common)
2. SpO2 sensor malfunctioned (common)
3. SpO2 board faulty connection to front end assembly (occasional)
4. SpO2 board malfunctioned (occasional)
5. Main board malfunctioned (rare)

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

Audible alarms do not sound patient safety

Monitor does not produce alarm sounds even when alarms are triggered

Ranked causes

1. Monitor in Audio Pause or Audio Off mode (common)
2. Speaker connection faulty (occasional)
3. Speaker malfunctioned (occasional)
4. Main board malfunctioned (rare)

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

Calibration: CO2 (Carbon Dioxide) patient safety

CO2 module calibration at initial use and periodic intervals; module replacement after 20,000 hours

Ranked causes

1. First calibration due at 1,200 hours of use or one year, whichever sooner (common)
2. Recurring calibration due annually or after 4,000 hours of use (common)
3. Calibration required after repairs or parts replacement (occasional)
4. CO2 module end-of-life reached at 20,000 hours (occasional)

First check

Check equipment operating hours

Test point: Usage counter
Expected: Less than 1,200 hours and less than one year since last calibration for initial; less than 4,000 hours and less than one year for recurring

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

CO2 measurements not displayed patient safety

Capnography readings do not appear on monitor screen

Ranked causes

1. CO2 module initializing (common)
2. CO2 sampling line bent or twisted (common)
3. CO2 module malfunctioned (occasional)
4. Main board malfunctioned (rare)

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

NBP cuff does not inflate patient safety

Non-invasive blood pressure measurement cuff fails to inflate during measurement

Ranked causes

1. Air tube or cuff bent or twisted (common)
2. Air leak in air tube or cuff (common)
3. NBP module malfunctioned (occasional)
4. Main board malfunctioned (rare)

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

NBP measurements unreliable patient safety

Blood pressure readings fluctuate or are inconsistent

Ranked causes

1. Wrong cuff size or incorrect cuff placement (common)
2. Initial pressure setting incorrect (common)
3. External problem (occasional)
4. NBP module needs calibration (occasional)

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

Temperature measurements unreliable patient safety

Temperature readings are inconsistent or fluctuate

Ranked causes

1. Probe malfunctioned (common)
2. Module not calibrated (common)
3. Front end malfunctioned (occasional)
4. Temperature module malfunctioned (occasional)

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

Temporal temperature measurement too low patient safety

Temporal temperature reading is below expected value

Ranked causes

1. Measurement area too moist from perspiration (common)
2. Multiple measurements in rapid succession (common)
3. Probe moved in curved motion down side of face (occasional)
4. Lens dirty (common)

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

Calibration: Enclosure leakage current safety test high voltage

Annual safety verification of enclosure leakage current per IEC 60601-1 standard

Ranked causes

1. Scheduled annual safety test per IEC 60601-1 (common)
2. Safety test required after opening monitor (front and back separation) (common)
3. Safety test required after impact or damage (occasional)

First check

Measure enclosure leakage current

Test point: Equipment enclosure
Expected: Within IEC 60601-1 limit

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

Calibration: Ground integrity safety test high voltage

Annual verification of ground integrity per IEC 60601-1 standard

Ranked causes

1. Scheduled annual safety test per IEC 60601-1 (common)
2. Safety test required after opening monitor (common)
3. Safety test required after impact or damage (occasional)

First check

Measure ground resistance

Test point: Equipment ground point
Expected: Within IEC 60601-1 specification

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

Calibration: Patient leakage current safety test high voltage

Annual verification of patient leakage current per IEC 60601-1 standard

Ranked causes

1. Scheduled annual safety test per IEC 60601-1 (common)
2. Safety test required after opening monitor (common)
3. Safety test required after impact or damage (occasional)

First check

Measure patient leakage current

Test point: Patient connection points
Expected: Within IEC 60601-1 limit

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

CO2 measurements unreliable patient safety

Capnography readings are inconsistent or fluctuate

Ranked causes

1. CO2 sampling line bent or twisted (common)
2. Problem external to monitor (occasional)
3. CO2 board not calibrated (occasional)

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

Monitor displays random or distorted graphics with white background

Display shows corrupted or garbled graphics with white background fill

Ranked causes

1. LCD signal cable not attached correctly (common)
2. LCD malfunctioned (occasional)
3. Main board malfunctioned (rare)

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

Monitor does not respond to touch screen caution

Touch screen input does not register or monitor is unresponsive to touch

Ranked causes

1. Touch screen is locked (common)
2. Touch screen not calibrated (common)
3. Touch screen malfunctioned (occasional)

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

Monitor screen is blank while powered on

Device is powered on but display shows no content or is completely dark

Ranked causes

1. Monitor in Standby mode (common)
2. LCD backlight connection faulty (occasional)
3. Main board malfunctioned (rare)

First check

Verify Standby mode is not active

Test point: Display screen and status indicators
Expected: Display powered on and not in Standby

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

Recorder paper jamming caution

Paper is stuck or jamming in recorder mechanism

Ranked causes

1. Paper not installed correctly (common)
2. Wrong type of paper installed (common)
3. Recorder mechanical problem (occasional)

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

NBP initial pressure too high patient safety

Initial inflation pressure reading exceeds expected value

Ranked causes

1. Cuff too tight (common)
2. Initial inflation pressure setting incorrect (common)

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

Speaker Malfunc or AUDIO FAILED message displayed

Monitor displays speaker malfunction message or audio failed error

Ranked causes

1. One or both speakers malfunctioned (occasional)
2. Faulty connection to speaker (common)

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

SpO2 measurements unreliable patient safety

Oxygen saturation readings are inconsistent or fluctuate

Ranked causes

1. External problem (e.g., excessive patient movement) (common)
2. Perfusion is low (occasional)

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

Auto Set Alarm Limits button unavailable

Auto Set Alarm Limits button cannot be selected or is grayed out

Ranked causes

1. Function only available in Interval Setting Menu for NBP, CO2, and SpO2 (common)

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

Battery Charge Failure message displayed caution

Monitor displays battery charging failure message

Ranked causes

1. Battery overcharged or charging current too high (occasional)

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

Battery Overcharged message displayed caution

Monitor shows battery overcharge warning

Ranked causes

1. Battery overcharged or charging current too high (occasional)

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

Battery Overheat message displayed and shutdown patient safety

Monitor displays battery overheat warning and shuts down automatically

Ranked causes

1. Battery exceeded 60°C temperature (occasional)

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

Calibration: CO2 gas measurement

Check and calibrate the Microstream CO2 gas measurement system. Required after first 1,200 hours or 1 year, then every 4,000 hours or annually. Also perform when equipment is repaired or parts are replaced.

Ranked causes

1. Calibration check required per maintenance schedule (common)

First check

Verify CO2 module status

Test point: CO2 numeric pane menu
Expected: CO2 Hardware set to On

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

Calibration: CO2 module static pressure

CO2 module calibration with 5% CO2 gas concentration; calibration value display

Ranked causes

1. CO2 module requires calibration (common)

First check

CO2 module calibration status

Test point: CO2 Test menu
Expected: Last Calibration Date and Hours to Calibration reset

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

Calibration: NBP (Non-invasive Blood Pressure) patient safety

Periodic calibration of blood pressure measurement system to maintain accuracy

Ranked causes

1. Scheduled preventive maintenance interval reached (common)

First check

Perform NBP calibration

Test point: NBP module
Expected: Calibration completed successfully

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

Calibration: NBP accuracy test patient safety

Periodic performance verification of blood pressure measurement accuracy

Ranked causes

1. Scheduled performance verification interval or suspected measurement error (common)

First check

Perform NBP accuracy performance test

Test point: NBP measurement system
Expected: Measurement accuracy within specification

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

Calibration: NBP module pressure calibration

NBP module calibration procedure with manual manometer; sets calibration points

Ranked causes

1. NBP module calibration adjustment required (occasional)

First check

NBP calibration start

Test point: NBP Test menu, NBP Calibration submenu
Expected: Monitor inflates expansion chamber; message 'Starting NBP Calibration...' appears

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

Calibration: NBP static pressure accuracy

NBP accuracy test using manometer and expansion chamber at 280 mmHg and 150 mmHg

Ranked causes

1. NBP module accuracy verification needed (common)

First check

NBP static pressure test at high pressure

Test point: NBP connector with manometer and 250 ml expansion chamber
Expected: 280 mmHg ± 3 mmHg, ± 3 mmHg
Tools: Reference manometer (accuracy 0.2% of reading), hand pump, valve, expansion chamber 250 ml ± 10%

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

Calibration: Nurse call relay

Periodic verification of nurse call relay function where used in facility protocols

Ranked causes

1. Scheduled performance verification when relay is part of facility protocols (common)

First check

Test nurse call relay function

Test point: Nurse call relay output
Expected: Relay activates and deactivates correctly per protocol

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

Calibration: Predictive temperature accuracy patient safety

Periodic verification of predictive temperature measurement performance

Ranked causes

1. Scheduled performance verification or suspected measurement error (common)

First check

Perform predictive temperature accuracy test

Test point: Temperature measurement system
Expected: Temperature measurement within specification tolerances

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

Calibration: SpO2 (Oxygen Saturation) patient safety

Periodic performance verification of pulse oximetry measurement

Ranked causes

1. Scheduled performance verification or suspected measurement error (common)

First check

Perform SpO2 performance test

Test point: Pulse oximeter module
Expected: SpO2 measurement within specification

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

Calibration: Temporal Temperature patient safety

Annual calibration of temporal temperature measurement system using Exergen calibration module

Ranked causes

1. Scheduled preventive maintenance interval reached (common)

First check

Perform Temporal Temperature calibration with Exergen module

Test point: Temporal temperature sensor
Expected: Calibration completed successfully

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

Calibration: Touch screen

Touch screen requires calibration after LCD replacement; five cross-hair targets must be touched in sequence

Ranked causes

1. LCD module replaced (common)

First check

Open Diagnostics Menu

Test point: Diagnostics Menu
Expected: Menu accessible

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

Cannot access fuses high voltage

Fuse box difficult or impossible to open during replacement procedure

Ranked causes

1. Excessive force or wrong tool used on fuse box (occasional)

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

CO2 module replacement reminder

CO2 module has a service life of 20,000 hours and must be replaced after this time.

Ranked causes

1. Module reaches end of service life at 20,000 hours (common)

First check

Monitor module operating hours

Test point: CO2 Test menu operating hours display
Expected: Module operating hours displayed in CO2 Test menu

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

Display test pattern verification

Visual inspection of LCD display using pattern sequence including vertical bars, solid colors, gray rectangles, and VCOM test pattern; each pattern displays for 5 seconds

Ranked causes

1. LCD display not functioning or defective (unknown)

First check

Observe display test pattern sequence

Test point: LCD screen
Expected: Vertical bars (black/white), vertical bars inverse, solid white, solid red, solid green, solid blue, gray rectangles, VCOM pattern; each for 5 seconds

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

High Battery Temp charge stopped message displayed caution

Monitor displays battery temperature warning and stops charging

Ranked causes

1. Battery temperature exceeds 50°C (occasional)

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

LED charging and alarm indicators test

Visual verification that charging LED (right side) and alarm LED (top center) illuminate in correct color sequences and patterns

Ranked causes

1. Charging or alarm LED not functioning or defective (unknown)

First check

Verify charging LED sequence

Test point: Charging LED (right side)
Expected: Solid yellow (5 sec), flashing yellow (5 sec), solid green (5 sec), flashing green (5 sec)

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

Monitor display not functioning

Monitor is powered but screen shows no image or incorrect display output

Ranked causes

1. Display module failure or video controller fault (unknown)

First check

Verify monitor display is functioning

Test point: Display screen
Expected: Image displayed, readable content

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

Monitor does not power on at all high voltage

Device fails to power on with either AC or battery power

Ranked causes

1. LCD, cables, battery, power supply, or main board malfunctioned (unknown)

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

Monitor freezes during startup patient safety

Device powers on, opening screen and color bar start, then display freezes

Ranked causes

1. Main board malfunctioned (rare)

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

Monitor not receiving power

Monitor fails to turn on or power indicator not lit

Ranked causes

1. Power switch off, battery uncharged, or AC cord disconnected (common)

First check

Verify power switch is in ON position

Test point: Power switch
Expected: ON

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

NBP alarm not sounding or error message not appearing

When NBP hose is connected without cuff and NBP button is pressed, no error message appears and no alarm tone sounds

Ranked causes

1. NBP alarms or module malfunction (unknown)

First check

Verify all alarms are enabled on monitor

Test point: Monitor settings
Expected: Monitor not in Audio Pause or Audio Off mode

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

NBP error message does not appear during NBP alarm test

When NBP hose is connected without cuff and NBP button is pressed, expected error message and alarm tone do not occur.

Ranked causes

1. NBP module malfunction or alarm system disabled (unknown)

First check

Verify monitor alarm settings

Test point: Monitor alarm controls
Expected: All alarms enabled, not in Audio Pause or Audio Off mode

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

Nurse call relay does not function as expected

Nurse call alarm output relay (phone jack connector) not operating correctly; tip and ring contacts not responding to alarm condition as expected

Ranked causes

1. Nurse call relay malfunction (unknown)

First check

Measure relay contact resistance on tip (normally open) during alarm condition

Test point: Phone jack connector tip
Expected: Closed

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

Only one charging LED color displayed caution

Charging LED shows only one color instead of expected indicator pattern

Ranked causes

1. Membrane switch assembly malfunctioned (common)

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

Patient data cleared unexpectedly patient safety

All patient data is cleared when enabling Demo mode; monitor displays DEMO indicator on main screen

Ranked causes

1. Demo Mode checkbox enabled (common)

First check

Verify Demo mode status on main screen

Test point: Patient information bar
Expected: DEMO indicator in white block with red text visible when enabled; absent when disabled

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

Recorder test strip print

Functional verification of integrated recorder module (if installed); test print pattern produced by print head and motor mechanism

Ranked causes

1. Faulty recorder print head or motor (unknown)

First check

Print test strip from recorder

Test point: Recorder mechanism
Expected: Clear test pattern printed on paper; message Recorder is idle appears when complete

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

Replace Battery Immediately message displayed patient safety

Monitor displays critical battery replacement message

Ranked causes

1. Battery cycle count exceeds 400 or capacity below 75% (common)

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

Replace Battery message displayed

Monitor displays Replace Battery message on screen

Ranked causes

1. Battery cycle count exceeds 300 or capacity below 80% (common)

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

Resident self test - memory and module verification

Automated memory test and front-end test of all available measurement modules (recorder, SpO2, NBP, temperature, CO2); each component test displays In Progress, then Pass/Fail/Not Supported

Ranked causes

1. Module hardware failure or memory defect (unknown)

First check

Run memory test

Test point: System RAM/ROM
Expected: Passed

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

Speaker audio test

Auditory verification of speaker functionality; monitor plays three tones at increasing volume for each speaker (left and right if dual-speaker system)

Ranked causes

1. Speaker or audio amplifier defective (unknown)

First check

Listen for three tones at increasing volume

Test point: Speaker output
Expected: Three audible tones, each louder than previous; sequence repeated for each speaker

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

SpO2 measurement out of expected range

SpO2 sensor connected and on finger, but displayed value is not between 95% and 100%

Ranked causes

1. Sensor or monitor measurement error (unknown)

First check

Connect adult SpO2 sensor to monitor

Test point: SpO2 connector on monitor
Expected: Red LED in sensor is lit

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

More symptoms

SpO2 value outside expected range during SpO2 sensor test
Temporal temperature measurement too high
Temporal temperature probe displays ERR
Test: NBP pneumatic leakage
Unsupported Battery or slow charge message displayed
Upgrade Masimo firmware
View Masimo firmware version

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

Error codes

Code	Meaning	Trigger	Severity
`1025`	System Error (1025)	Could not load Resource file	error
`1026`	System Error (1026)	Could not load data from flash	error
`1027`	System Error (1027)	Could not load system configuration data	error
`1028`	System Error (1028)	Could not load profile	error
`1031`	System Error (1031)	Monitoring and watchdog thread could not initialize	error
`1032`	System Error	Could not open audio files	error
`1043`	System Error	Thread blocked	error
`1044`	System Error	Front end software error detected	error
`1045`	System Error	Printing software error detected	error
`1047`	System Error	Monitoring software error detected	error
`1048`	System Error	Exception detected in alarming software	error
`1051`	Cannot initialize NBP module	NBP module fails to initialize during startup or diagnostic test	error
`1053`	Loss of monitoring signal	Monitoring signal lost or system reset occurred	info
`1055`	Cannot initialize LCD display	LCD display fails to initialize during startup or diagnostic test	error
`257`	System Error	Battery charger power failure	error
`261`	System Error	Battery is overcharged	error
`264`	System Error	Battery is over temperature	error
`266`	System Error	Unrecognized battery detected	error
`267 (1)`	System Error	Battery cycle count >300 or capacity ≤80% of design capacity	warning
`267 (2)`	System Error	Battery cycle count >400 or capacity ≤75% of design capacity	error
`401`	System Error	Could not read main board EEPROM	error
`402`	System Error	Could not write main board EEPROM	error
`403`	System Error	Main board EEPROM checksum error	error
`818 (101)`	NBP Equipment Malfunction	Task overrun detected	error
`818 (102)`	NBP Equipment Malfunction	Interrupt stack overwritten	critical
`818 (103)`	NBP Equipment Malfunction	User stack overwritten	critical
`818 (104)`	NBP Equipment Malfunction	Data validity check failed	error
`818 (106)`	NBP Equipment Malfunction	Unable to write init flag to non-volatile memory	error
`818 (107)`	NBP Equipment Malfunction	Unable to verify init flag written to non-volatile memory	error
`818 (109)`	NBP Equipment Malfunction	Unable to write NBP configuration data to non-volatile memory	error
`818 (110)`	NBP Equipment Malfunction	Data validity issue: environmental data verification failed	error
`818 (111)`	NBP Equipment Malfunction	Calibration data checksum error	error
`818 (112)`	NBP Equipment Malfunction	Unable to write calibration data to non-volatile memory	error
`818 (113)`	NBP Equipment Malfunction	Unable to verify calibration data in non-volatile memory	error
`818 (114)`	NBP Equipment Malfunction	Error log checksum error	error
`818 (115)`	NBP Equipment Malfunction	Unable to write error log to non-volatile memory	warning
`818 (116)`	NBP Equipment Malfunction	Unable to verify error log in non-volatile memory	warning
`818 (117)`	NBP Equipment Malfunction	Inflation cycle count and runtime data checksum error	warning
`818 (118)`	NBP Equipment Malfunction	Unable to write inflation cycle and runtime data	warning
`818 (119)`	NBP Equipment Malfunction	Unable to verify inflation cycle and runtime data	warning
`818 (120)`	NBP Equipment Malfunction	New message sent while previous message incomplete	error
`818 (121)`	NBP Equipment Malfunction	Pressure value from second pressure sensor not available	error
`818 (122)`	NBP Equipment Malfunction	5-volt supply voltage too high or low	error
`818 (123)`	NBP Equipment Malfunction	Error from the 5-volt regulator	error
`818 (124)`	NBP Equipment Malfunction	12-volt supply voltage too high or low	error
`818 (128)`	NBP Equipment Malfunction	Offset of pressure sensor 1 out of range	error
`818 (129)`	NBP Equipment Malfunction	Offset of pressure sensor 2 out of range	error
`818 (130)`	NBP Equipment Malfunction	Response of pressure sensor 2 to test signal out of range	error
`818 (131)`	NBP Equipment Malfunction	Difference between two pressure channels too large	error
`818 (132)`	NBP Equipment Malfunction	One of the two valves activated for too long	error
`818 (133)`	NBP Equipment Malfunction - CRC mismatch in calibration data	CRC error detected in calibration data on startup	error
`818 (134)`	NBP Equipment Malfunction - CRC mismatch in error log data	CRC error detected in error log data on startup	error
`818 (135)`	NBP Equipment Malfunction - CRC mismatch in inflation cycle and runtime data	CRC error in inflation cycle count and runtime data	error
`818 (136)`	NBP Equipment Malfunction - Pneumatic safety switch malfunction	Pneumatic safety switch does not respond correctly	error
`818 (137)`	NBP Equipment Malfunction - Valve 2 defective or blocked	Valve 2 fails to open or close properly	error
`818 (141)`	NBP Equipment Malfunction - Inflation time exceeded	Inflation time for selected patient type exceeds normal duration	warning
`818 (199)`	NBP Equipment Malfunction - No data from NBP block	No communication with NBP block module	error
`818 (25)`	NBP Equipment Malfunction	NBP hardware malfunction due to no data	error
`819`	NBP Equipment Malfunction - Not Calibrated	NBP module has not been calibrated	error
`819 (127)`	NBP Equipment Malfunction - NBP module not calibrated	NBP module calibration not performed or invalid	error
`820 (138)`	NBP Hose Blocked	Blockage or pressure drop detected in pneumatic system	error
`821 (139)`	NBP Air Leak	Air leak or pressure loss detected in pneumatic system	error
`833 (1)`	SpO2 Equipment Malfunction - ROM checksum error	SpO2 board ROM fails checksum verification on startup	error
`833 (10)`	SpO2 Equipment Malfunction - Host communication error	SpO2 board fails to communicate with main processor	error
`833 (100)`	SpO2 Equipment Malfunction - Masimo board not enabled	Masimo SpO2 board is installed but not enabled in firmware	error
`833 (101)`	SpO2 Equipment Malfunction - Masimo DSP Raw Queue Overrun	Masimo DSP raw data queue overflows during operation	error
`833 (102)`	SpO2 Equipment Malfunction - Masimo DSP hardware failure	Masimo DSP processor fails initialization or self-test	error
`833 (103)`	SpO2 Equipment Malfunction - Masimo MCU failure	Masimo microcontroller unit fails initialization or test	error
`833 (104)`	SpO2 Equipment Malfunction - Masimo watchdog failure	Masimo watchdog timer detects processor hang or failure	critical
`833 (105)`	SpO2 Equipment Malfunction - Masimo invalid board type	Masimo board type identifier does not match expected value	error
`833 (106)`	SpO2 Equipment Malfunction - Masimo invalid master control state	Masimo master control state machine detects invalid state	error
`833 (107)`	SpO2 Equipment Malfunction - Masimo SRAM transfer failure	Masimo SRAM memory transfer fails during initialization	error
`833 (108)`	SpO2 Equipment Malfunction - Masimo SRAM task queue overrun	Masimo SRAM task queue overflows during operation	error
`833 (109)`	SpO2 Equipment Malfunction - Masimo database failure	Masimo SpO2 board database initialization or access fails	error
`833 (110)`	SpO2 Equipment Malfunction - Masimo invalid flash memory device	Masimo flash memory device not recognized or fails test	error
`833 (2)`	SpO2 Equipment Malfunction - RAM test error	SpO2 board RAM fails self-test on startup	error
`833 (20)`	SpO2 Equipment Malfunction - Hardware defect	SpO2 board detects internal hardware fault	error
`833 (4)`	SpO2 Equipment Malfunction - Analog signal path self test failed	SpO2 analog signal path fails self-test	error
`833 (40)`	SpO2 Equipment Malfunction - Non-volatile memory corrupted	SpO2 board non-volatile memory checksum or integrity failure	error
`833 (6)`	SpO2 Equipment Malfunction - Self test timeout	SpO2 board self-test does not complete in expected time	error
`833 (8)`	SpO2 Equipment Malfunction - Internal DSP communication error	Communication fails between SpO2 board and DSP	error
`834`	SpO2 Sensor Malfunction	SpO2 sensor does not respond or connection lost	error
`836`	SpO2 Communication Error	Communication lost with SpO2 module during operation	info
`837`	SpO2 Error - Front end will reset	No data received from SpO2 module	error
`838 (100)`	SpHb Equipment Malfunction - not enabled	SpHb module installed but not enabled	error
`839 (100)`	RRa Equipment Malfunction - not enabled	RRa module installed but not enabled	error
`850`	CO2 Error - Front end will reset	No data received from CO2 module	error
`851`	CO2 Equipment Malfunction - Communication error	CO2 module communication fails	error
`851 (1)`	CO2 Equipment Malfunction - Calibration error	CO2 module calibration verification fails	error
`851 (16)`	CO2 Equipment Malfunction - Main board error	CO2 module main board fault detected	error
`851 (17)`	CO2 Equipment Malfunction - Module malfunction	General CO2 module malfunction detected	error
`851 (18)`	CO2 Equipment Malfunction - Scrubber pump error	CO2 scrubber or pump mechanism fails	error
`851 (19)`	CO2 Equipment Malfunction - Sensor malfunction	CO2 sensor fails to respond or produce valid data	error
`851 (2)`	CO2 Equipment Malfunction - Sampling line malfunction	CO2 sampling line blockage or disconnection detected	warning
`851 (20)`	CO2 Equipment Malfunction - 15V voltage out of range	15 V supply voltage to CO2 module out of specification	error
`851 (3)`	CO2 Equipment Malfunction - Occlusion in input line	Blockage detected in CO2 input line	warning
`866 (21)`	Temp Probe Error - Operating above 43.3°C	Temperature probe operating in conditions above 43.3°C (112°F)	error
`866 (22)`	Temp Probe Error - Excessive heater energy	Excessive heater energy detected or slow temperature response	error
`866 (32)`	Temp Probe Error - Thermistor pulled away from tip	Thermistor separation or heater failure detected	error
`866 (33)`	Temp Probe Error - Probe not responsive	Probe does not respond to commands or not calibrated	error
`866 (34)`	Temperature probe not characterized or calibrated	Probe initialization or measurement attempt	warning
`866 (45)`	Temperature measurement below allowable range	Measurement reading significantly below low ambient limits	warning
`866 (46)`	Temperature measurement above allowable range	Measurement reading significantly above high ambient or patient limits	warning
`866 (52)`	Temperature probe not characterized or calibrated	Probe initialization or characterization check	warning
`866 (63)`	Temperature probe well missing or improperly installed	Probe well detection during initialization	error
`866 (70)`	Error reading probe EEPROM	Probe EEPROM read operation during startup or measurement	error
`866 (75)`	Probe EEPROM read error or probe not factory tested	Probe EEPROM read or factory test validation	error
`866 (78)`	Probe non-volatile error detection mechanism triggered	Probe error detection during operation	error
`866 (79)`	Temperature module non-volatile memory error detected	Module error detection mechanism during operation	error
`866 (80)`	Probe heater stuck on	Probe heater turnoff command but heater still on	error
`866 (81)`	Probe heater stuck off	Probe heater turnon command but heater still off	error
`867 (101)`	Temperature Module Malfunction (101)	Checksum error in module	error
`867 (102)`	Temperature Module Malfunction (102)	Calibration error in module	error
`867 (103)`	Temperature Module Malfunction (103)	Ambient temperature below minimum operating limit	warning
`867 (104)`	Temperature Module Malfunction (104)	Ambient temperature above maximum operating limit	warning
`867 (201)`	Temporal Temperature Module Malfunction (201)	Temporal temperature module checksum error	error
`867 (202)`	Temporal Temperature Module Malfunction (202)	Internal firmware error in temporal module	error
`867 (203)`	Temporal Temperature Module Malfunction (203)	Temporal module below allowable ambient temperature	warning
`867 (204)`	Temporal Temperature Module Malfunction (204)	Temporal module above allowable ambient temperature	warning
`867 (24)`	Ambient temperature too high	Ambient temperature measurement exceeds safe operating range	warning
`867 (25)`	Ambient temperature too low	Ambient temperature measurement below safe operating range	warning
`867 (27)`	Battery or power supply voltage exceeds maximum	Supply voltage monitoring detects overvoltage condition	error
`867 (28)`	Battery or power supply voltage below minimum	Supply voltage monitoring detects undervoltage condition	error
`867 (47)`	Internal calibration resistor damaged	Calibration resistor validation during operation	error
`867 (48)`	Internal calibration resistor damaged	Calibration resistor validation during operation	error
`867 (49)`	Circuit validation resistor damaged	Circuit validation resistor check during operation	error
`867 (50)`	Circuit validation resistor damaged	Circuit validation resistor check during operation	error
`867 (51)`	A/D measurement timeout	Analog to digital conversion does not complete in time	error
`867 (59)`	Battery or power supply voltage below maximum	Supply voltage monitoring detects low voltage condition	error
`867 (60)`	Battery or power supply voltage exceeds minimum	Supply voltage monitoring detects high voltage condition	error
`867 (61)`	Reference voltage circuit under voltage or unstable	Reference voltage regulation monitoring during operation	error
`867 (62)`	Temperature module not calibrated	Module calibration check during startup	error
`867 (65)`	Error saving to module EEPROM	EEPROM write operation during calibration or operation	error
`867 (66)`	Module non-volatile calibration memory error detected	Calibration memory error detection mechanism during operation	error
`867 (67)`	Error reading or writing module EEPROM	EEPROM read/write operation during operation	error
`867 (68)`	Error reading or writing module EEPROM	EEPROM read/write operation during operation	error
`867 (69)`	Error reading or writing module EEPROM	EEPROM read/write operation during operation	error
`867 (74)`	Temperature Module Malfunction (74)	Internal error during EEPROM initialization	error
`867 (75)`	Temperature Module Malfunction (75)	Cannot read probe EEPROM correctly or probe untested	error
`867 (82)`	Temperature Module Malfunction (82)	Signal HTR_Q on, HTRC off, but voltage present	error
`867 (83)`	Temperature Module Malfunction (83)	Signal HTR_Q tri-stated with HTRC enabled and heater power present	error
`867 (84)`	Temperature Module Malfunction (84)	Q&C on but heater voltage insufficient	error
`867 (85)`	Temperature Module Malfunction (85)	Heater fail-safe did not turn off as expected	error
`868`	Temperature Error	No data from temperature module	error
`881`	Speaker Malfunction	Speaker failure	warning
`882`	Wireless Module Malfunction (882)	Wireless module malfunction	error
`883`	System Error (883)	Internal state error for power management detected	error
`887`	System Error (887)	Backup image used to boot due to latest software image failure	error
`888`	System Error	System could not load font files	error
`889`	System Error (889)	System failed to mount one of the file systems	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.