Patient monitors · Life Scope family

Nihon Kohden BSM-6000: troubleshooting and error codes

The ServiceForge knowledge base holds 305 documented symptoms for the Nihon Kohden BSM-6000, with 483 ranked causes, 245 diagnostic checks with test points and expected values, and 229 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

ECG noise in signal patient safety

High-amplitude noise corrupting ECG waveform; EMG muscle noise, motion artifact, or interference

Ranked causes

1. Baseline instability from respiration or body movement (common)
2. EMG muscle noise at electrode site (common)
3. Electrode pulled by lead tension (occasional)
4. Dry or degraded electrode (common)
5. Poor contact between lead and electrode (occasional)
6. High electrode impedance (occasional)
7. Electric blanket in use (rare)
8. Strong electromagnetic interference nearby (occasional)
9. Equipotential grounding not acquired (occasional)

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

Electromagnetic interference affecting monitoring patient safety

Artifact appears on display, incorrect readings, or system malfunction due to external EM sources

Ranked causes

1. Strong EM interference from nearby emitter (radio station, cellular phone) (common)
2. RF interference through AC power supply (occasional)
3. Electrostatic discharge effects (occasional)
4. Equipment interferes with radio/TV receiver (occasional)
5. Lightning-induced voltage surge (rare)
6. Incompatible accessory, transducer, or cable connected (occasional)
7. Non-standard system configuration used (occasional)
8. Excessive measurement sensitivity setting (common)
9. Radiation therapy room environment interference (rare)

First check

Identify nearby EM emitters (radio, cellular phone, etc.)

Test point: Equipment location
Expected: No strong emitters within operating range

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

ECG waveform does not appear on screen

No ECG waveform displayed; 'ECG CHECK ELECTRODES' message may appear

Ranked causes

1. Electrode peels or electrode gel is dry (common)
2. High contact impedance between electrode and skin (common)
3. Instrument not properly grounded (occasional)
4. ECG connection cord not firmly connected (common)
5. ECG connection cord failure (occasional)
6. Number of electrodes set incorrectly (occasional)
7. Input unit failure (rare)

First check

Inspect electrodes for peeling or dry gel

Test point: Patient electrode pads
Expected: Electrodes intact with wet gel

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

Zeroing (zero adjustment) incomplete

IBP zero adjustment procedure does not complete successfully

Ranked causes

1. Noise (MPU MODULE ERROR displayed) (occasional)
2. IBP connection cord or blood pressure transducer failure (PRESS CHECK SENSOR displayed) (occasional)
3. Pressure less than -200 mmHg or more than +200 mmHg applied to transducer (occasional)
4. Transducer failure (occasional)
5. Some pressure remains (PRESS ZERO UNSTABLE displayed) (occasional)
6. External pressure or vibration applied to blood circuit (occasional)
7. MPU board or EXTMPU board failure (rare)

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

AC power lamp does not light high voltage

Instrument does not turn on in AC power operation and AC power lamp is off

Ranked causes

1. Power cord failure (common)
2. Poor contact at cable between AC inlet and power supply unit (common)
3. Poor contact at cable between power supply unit and MAIN DIGITAL board (common)
4. Poor contact at cable between MAIN DIGITAL and FRONT IF board (common)
5. Poor contact at cable between FRONT IF and Power SW board (common)

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

CO2 measurement out of range patient safety

CO2 calculated value outside measuring range; catheter retaining condition or coefficient value incorrect

Ranked causes

1. Injectate temperature not specified by catheter manufacturer (common)
2. Blood temperature out of range (occasional)
3. Catheter faulty (occasional)
4. Returned to thermodilution baseline too late (rare)
5. Injectate not cooled; room temperature above 27°C (occasional)

First check

Measure blood temperature

Test point: Temperature probe
Expected: 15°C to 45°C, +15 to +45°C

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

ECG electrode detached or lead problem patient safety

ECG electrode lead disconnected or detached from electrode; poor contact between lead and electrode

Ranked causes

1. Operator disconnected ECG lead or cord (common)
2. Electrode lead detached from electrode (common)
3. Electrode cannot attach firmly to skin (occasional)
4. Electrode lead disconnected from connection cord (common)
5. Poor contact between lead and electrode (occasional)

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

Heart rate not counted correctly and ECG noise displayed

Heart rate detection inaccurate; 'ECG NOISE' message appears on display

Ranked causes

1. Electrode peels or electrode gel is dry (common)
2. Baseline drift or EMG due to body movement (common)
3. High contact impedance between electrode and skin (common)
4. Instrument not properly grounded (occasional)
5. Input unit failure (rare)

First check

Inspect electrodes for peeling or dry gel

Test point: Patient electrode pads
Expected: Electrodes intact with wet gel

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

NIBP MEASURING message and automatic remeasurement

Patient movement or weak pulse wave detected during active NIBP measurement, automatic remeasurement initiated

Ranked causes

1. Patient moved during measurement (common)
2. Weak patient pulse wave (occasional)
3. Cuff not properly attached (common)
4. Incorrect cuff size for patient (common)
5. Patient unstable pulse and heart rate (occasional)

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

SpO2-2 DETECTING PULSE - Pulse detection in progress (NK/Masimo) patient safety

SpO2-2 sensor actively searching for and detecting pulse waveform

Ranked causes

1. Normal pulse detection process in progress (common)
2. Poor blood circulation at site (common)
3. Probe not attached at appropriate site (occasional)
4. Probe secured too tightly (occasional)
5. Probe disconnected from adapter (occasional)

First check

Monitor detection progress

Test point: SpO2 waveform display
Expected: Pulse waveform eventually detected

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

TEMP CHECK patient safety

Temperature probe or connection cord disconnected or damaged

Ranked causes

1. Probe disconnected from TEMP socket or cord disconnected from MULTI socket (common)
2. Probe or temperature connection cord damaged (occasional)
3. Measured value outside measuring range (occasional)
4. Temperature connection cord disconnected (occasional)
5. Temperature connection cord damaged (occasional)

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

CCO CHECK SENSOR disconnected

FloTrac sensor disconnected from APCO/IBP processor or specified FloTrac sensor not being used.

Ranked causes

1. FloTrac sensor disconnected from APCO/IBP processor (common)
2. Wrong FloTrac sensor model used (occasional)
3. Cable or sensor damaged (occasional)
4. APCO/IBP processor internal failure (rare)

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

CCO CHECK WAVEFORM unstable

Arterial waveform quality insufficient for accurate CO measurement or transmission.

Ranked causes

1. Arterial waveform inadequate for CO measurement (common)
2. Waveform inadequate for extended measurement period (occasional)
3. IBP line improper setup (occasional)
4. Arterial pressure outside normal range (occasional)

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

Baseline drift or waveform synchronized with heartbeat in respiration

Baseline drift or heartbeat-synchronized waveform mixed in respiration measurement

Ranked causes

1. Body movement artifact in respiration signal (common)
2. Respiration noise not filtered (occasional)
3. Input unit failure (rare)

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

BIS SENSOR disconnected patient safety

BIS sensor disconnected from patient interface cable or sensor attachment failed.

Ranked causes

1. Patient interface cable disconnected from BIS/BISx processor (common)
2. BIS sensor disconnected from patient interface cable (common)
3. BIS sensor impedance too high (occasional)

First check

Verify patient interface cable connection

Test point: BIS/BISx processor interface
Expected: Cable firmly seated with click

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

CCO UNSTABLE measurement

Arterial waveform quality or IBP line conditions unstable for reliable CO measurement.

Ranked causes

1. Arterial waveform unstable (common)
2. IBP line not appropriate (occasional)
3. Patient pulse getting low (occasional)

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

Communication loss system network caution

System network cable disconnected or communication link failure between monitor and hub/router

Ranked causes

1. Network cable disconnected (common)
2. Cable or connector faulty (occasional)
3. Hub or router defective (occasional)

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

ECG electrode configuration incorrect patient safety

NUMBER OF ELECTRODES setting on ECG window not correct; differential offset voltage at electrodes

Ranked causes

1. Incorrect electrode count setting (common)
2. Electrode lead damaged (occasional)
3. Differential offset voltage at electrodes (occasional)

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

Frequent pacing marks appear on ECG

Pacing marks appear frequently on ECG waveform display

Ranked causes

1. Instrument not properly grounded (common)
2. Electric blanket not shielded (occasional)
3. Input unit failure (rare)

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

GAS CHECK WATERTRAP message displayed

Water trap not properly attached or clogged, or sampling line not properly connected

Ranked causes

1. Water trap not securely attached (common)
2. Sampling line not properly connected (common)
3. Water trap clogged (occasional)

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

GAS LINEBLOCK re-alarm message

Sampling or exhaust gas line blocked, or water trap clogged or sample line blocked

Ranked causes

1. Water trap clogged (common)
2. Sampling line clogged or bent (common)
3. Exhaust gas tube clogged or bent (common)

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

GAS MIXED GAS silence alarm patient safety

Two anesthetic agents detected simultaneously, typically during vaporizer change or dual vaporizer operation

Ranked causes

1. Vaporizer being changed with dual agents in circuit (common)
2. Two vaporizers operating simultaneously (occasional)
3. Wrong agent delivered to vaporizer (occasional)

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

IBP DISCONNECT SENSOR - Blood pressure transducer disconnected patient safety

Invasive blood pressure monitoring disconnected or not receiving pulse and mean pressure

Ranked causes

1. Blood pressure transducer not properly connected (common)
2. Blood pressure transducer damaged (occasional)
3. IBP connection cord is damaged (occasional)

First check

Verify IBP transducer connection

Test point: IBP connector on monitor
Expected: Firmly connected and seated

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

NIBP measurement shows MEAS TIMEOUT patient safety

NIBP measurement fails after remeasurement, displays 'MEAS TIMEOUT' message

Ranked causes

1. Cuff not properly attached to patient (common)
2. Vibration or external pressure on cuff or air hose (common)
3. Failure in oscillation signal amplification circuit of MPU board (occasional)

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

Nothing displayed on external display

External display shows no output or is blank

Ranked causes

1. Poor contact or break in display cable when interface displayed in OPTIONS (common)
2. Display, interface, or MAIN DIGITAL board failure (occasional)
3. Interface or MAIN DIGITAL board failure when not in OPTIONS (occasional)

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

PRINT ERROR

Network printer communication or paper loading failure

Ranked causes

1. Too many print commands sent to printer (occasional)
2. Incorrect printer settings (common)
3. Recording paper not properly loaded (common)

First check

Wait for print queue to clear

Test point: Printer status
Expected: No pending print jobs

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

SpO2 DETECTING PULSE - Cannot find pulse waveform yet patient safety

SpO2 sensor searching for pulse waveform but not yet detected

Ranked causes

1. System searching for pulse waveform detection (common)
2. Poor blood circulation (common)
3. Probe attached too tightly (occasional)

First check

Wait for initial pulse detection

Test point: SpO2 waveform display
Expected: Pulse waveform appears within normal time

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

SpO2 LIGHT INTERFERENCE - Excessive light at probe site (NK/Masimo)

SpO2 sensor detecting too much ambient light affecting measurement

Ranked causes

1. Excessive ambient light at probe site (common)
2. Interference from surroundings (occasional)
3. Probe attachment site not appropriate (occasional)

First check

Assess ambient light level at probe site

Test point: Probe area illumination
Expected: Minimal direct or ambient light

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

SpO2 LOW QUALITY SIGNAL - Poor signal quality or movement artifact (NK/Nellcor/Masimo) patient safety

SpO2 measuring unstable waveform due to motion or low perfusion

Ranked causes

1. Considerable body movement (common)
2. Probe not properly attached (common)
3. Low signal IQ (occasional)

First check

Assess patient motion

Test point: Patient extremity movement
Expected: Minimal involuntary movement

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

SpO2 WEAK PULSE - Poor peripheral circulation or low perfusion (NK/Masimo) patient safety

SpO2 sensor detecting weak pulse signal due to poor circulation or tight probe

Ranked causes

1. Poor peripheral circulation (common)
2. Probe attached too tightly (occasional)
3. Low perfusion index (occasional)

First check

Assess patient peripheral perfusion

Test point: Patient extremity color, warmth, capillary refill
Expected: Good perfusion with normal parameters

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

SpO2-2 ALARM - Pulse oximeter alarm (Nellcor/Masimo) patient safety

Alarm condition on connected pulse oximeter (SpO2-2 channel)

Ranked causes

1. Alarm on pulse oximeter device (common)
2. Poor blood circulation at measurement site (common)
3. Probe attached too tightly (occasional)

First check

Review pulse oximeter alarm indication

Test point: SpO2 device display
Expected: Identify specific alarm condition

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

SpO2-2 CHANGE PROBE - Probe deteriorated or damaged (NK/Nellcor/Masimo) patient safety

SpO2-2 probe has deteriorated, damaged, or short-circuited and requires replacement

Ranked causes

1. Probe deteriorated from age or use (common)
2. Probe damaged or short-circuited (occasional)
3. SpO2 adapter is damaged (occasional)

First check

Inspect probe for visible deterioration

Test point: Probe body and connector
Expected: No discoloration, cracks, or wear

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

SpO2-2 DETECT PULSE - Cannot detect pulse (Masimo) patient safety

Masimo SpO2-2 module cannot detect pulse signal

Ranked causes

1. Pulse not detected by SpO2-2 sensor (common)
2. Poor blood circulation (common)
3. Probe attached too tightly (occasional)

First check

Assess patient perfusion status

Test point: Patient extremity
Expected: Good color and warmth indicating adequate circulation

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

SpO2-2 DETECT PULSE - Cannot detect pulse (NK) patient safety

NK (Nihon Kohden) SpO2-2 module cannot detect pulse signal

Ranked causes

1. Pulse not detected by SpO2-2 sensor (common)
2. Poor blood circulation (common)
3. Probe attached too tightly (occasional)

First check

Assess patient perfusion status

Test point: Patient extremity
Expected: Good color and warmth indicating adequate circulation

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

SpO2-2 LIGHT INTERFERENCE - Excessive light interference (NK/Masimo)

SpO2-2 module detecting excessive light interference at probe site

Ranked causes

1. Excessive ambient light at probe site (common)
2. Interference from surroundings (occasional)
3. Probe attachment site not appropriate (occasional)

First check

Assess light level at probe

Test point: Probe area
Expected: Minimal ambient light exposure

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

SpO2-2 WEAK PULSE - Weak pulse signal (NK/Masimo) patient safety

SpO2-2 weak pulse detection from poor circulation or probe tension issue

Ranked causes

1. Poor peripheral circulation (common)
2. Probe attached too tightly (occasional)
3. Low perfusion status (occasional)

First check

Evaluate patient hemodynamic status

Test point: Patient vital signs and appearance
Expected: Adequate blood pressure and perfusion

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

TOF CHECK SENSOR patient safety

Main cable, stimulation cable, electrodes disconnected or abnormal stimulation current

Ranked causes

1. Cables or electrodes not connected (common)
2. Twitch in patient too strong (rare)
3. Abnormal electric stimulation current detected (rare)

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

Touch key response does not match display position

Pressing a key position on screen does not activate the intended function; mark appears elsewhere

Ranked causes

1. Edge protection rubber not properly attached (common)
2. Touch screen failure (occasional)
3. MAIN DIGITAL board failure (rare)

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

Unit does not turn on in battery operation caution

Instrument fails to power on when operating from battery

Ranked causes

1. Poor contact at connectors between BATT MOTHER0 and MAIN DIGITAL boards (common)
2. Poor contact at connectors between BATT MOTHER1 and MAIN DIGITAL boards (common)
3. MAIN DIGITAL, BATT MOTHER0 or BATT MOTHER1 board failure (common)

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

Alarm information not output from bedside monitor to nurse call system patient safety

Alarm signals from bedside monitor are not transmitted to nurse call system

Ranked causes

1. Short circuit in YJ-672P nurse call cable when interface displayed and signals not output (occasional)
2. Interface or MAIN DIGITAL board failure when not in OPTIONS (occasional)

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

Cannot calibrate FiO2, O2CAL?? displayed

FiO2 calibration fails, message 'O2CAL??' shown on screen

Ranked causes

1. O2 sensor reached end of life (common)
2. MPU board or EXTMPU board failure (occasional)

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

Cannot communicate with external equipment through RS-232C port

Communication failure through RS-232C port on QI-631P or QI-671P interface

Ranked causes

1. Wrong baud rate setting or connection cable failure when interface displayed (common)
2. Interface or MAIN DIGITAL board failure when not displayed in OPTIONS (occasional)

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

Cannot communicate with network

Network communication fails; no response when connected to PC with cross cable and ping test

Ranked causes

1. MAIN DIGITAL board failure when ping response not returned (occasional)
2. Hub and cables have problems when ping response returned (occasional)

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

Cannot communicate with optional unit through multilink port

Optional unit (QI-631P, QI-632P, QI-634P, QI-671P, QI-672P) not recognized; no error displayed

Ranked causes

1. Interface or MAIN DIGITAL board failure when not displayed in OPTIONS (occasional)
2. Optional unit or interface failure when port does not display model number (occasional)

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

Cannot measure cardiac output (CO), temperatures, MPU MODULE ERROR displayed

CO, Tb and Ti temperatures cannot be measured, error message 'MPU MODULE ERROR?' shown

Ranked causes

1. Noise such as static electricity in CO circuit (common)
2. Input unit failure (occasional)

First check

Measure CO after disconnecting connection cord and reattaching input unit

Test point: CO connection cord
Expected: CO can be measured

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

Cannot measure CO and temperatures, no error message displayed

CO, Tb and Ti cannot be measured, no error message shown on screen

Ranked causes

1. MPU board or EXTMPU board failure (occasional)
2. CO connection cord or balloon catheter failure (occasional)

First check

Connect CO connection cord and balloon catheter to another MP socket

Test point: Alternative MP sockets
Expected: CO can be measured

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

Cannot measure CO, BASELINE DRIFT displayed

CO measurement fails, error message 'CO BASELINE DRIFT' shown on screen

Ranked causes

1. MPU board or EXTMPU board failure (occasional)
2. Physiological fluctuation or external noise interferes with baseline (occasional)

First check

Connect AX-410G to CO connector at MP socket

Test point: CO connector of AX-410G at MP socket
Expected: Problem disappears or remains

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

Cannot measure ECG and module error displayed

ECG measurement fails with 'ECG MODULE ERROR?' message on screen

Ranked causes

1. Noise such as static electricity (common)
2. Input unit failure (occasional)

First check

Disconnect ECG connection cord and remove then reattach input unit

Test point: ECG input
Expected: ECG can be measured

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

Cannot measure FiO2, MPU MODULE ERROR displayed

FiO2 concentration cannot be measured, error message 'MPU MODULE ERROR?' appears

Ranked causes

1. Noise such as static electricity in FiO2 circuit (common)
2. FiO2 input unit failure (occasional)

First check

Measure FiO2 after disconnecting connection cord and reattaching input unit

Test point: FiO2 connection cord
Expected: FiO2 can be measured

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

Cannot measure FiO2, no error message, no FiO2 value displayed

No FiO2 measurement, no error message shown on screen

Ranked causes

1. MPU board or EXTMPU board failure (occasional)
2. FiO2 connection cord or O2 sensor failure (occasional)

First check

Connect FiO2 connection cord and O2 sensor to another MP socket

Test point: Alternative MP sockets
Expected: FiO2 can be measured

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

Cannot measure IBP and module error displayed

Invasive blood pressure measurement fails with 'MPU MODULE ERROR?' message on screen

Ranked causes

1. Noise such as static electricity (common)
2. Input unit failure (occasional)

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

Cannot measure IBP; no error message and no pressure value displayed

IBP measurement fails with no error message; blood pressure value not shown

Ranked causes

1. MPU board or EXTMPU board failure (common)
2. IBP connection cord or blood pressure transducer failure (occasional)

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

Cannot measure respiration (thermistor), MPU MODULE ERROR displayed

Temperature cannot be measured, error message 'MPU MODULE ERROR?' appears on screen

Ranked causes

1. Noise such as static electricity in respiration pickup circuit (common)
2. Input unit failure (occasional)

First check

Measure respiration after disconnecting MP connector and reattaching input unit

Test point: MP connector of respiration pickup
Expected: Respiration can be measured

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

Cannot measure respiration, no error message, no respiration rate displayed

No temperature measurement, no error message on screen, respiration rate not shown

Ranked causes

1. MPU board or EXTMPU board failure (occasional)
2. Respiration pickup failure (occasional)

First check

Connect respiration pickup to another MP socket

Test point: Alternative MP sockets
Expected: Respiration can be measured

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

Cannot measure SpO2, WEAK PULSE or CANNOT DETECT PULSE message displayed

SpO2 measurement fails, message 'SpO2 WEAK PULSE' or 'SpO2 CANNOT DETECT PULSE?' shown

Ranked causes

1. SpO2 board or MPUPWR board failure (occasional)
2. Instrument and accessories functioning normally (unknown)

First check

Replace SpO2 connection cord and probe, then connect AX-410G to SpO2 socket

Test point: SpO2 socket
Expected: Messages disappear when AX-410G is connected

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

Cannot measure temperature

Temperature measurement fails; temperature value not displayed

Ranked causes

1. Temperature probe failure (common)
2. Connector board or Analog board failure (occasional)

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

CATHETER not connected properly patient safety

Catheter connection error for hemodynamic monitoring (PCCO/ProAQT/CCO)

Ranked causes

1. JT-170P CO connection cord improperly connected (common)
2. ProAQT sensor expired (common)

First check

Verify ProAQT sensor connection

Test point: Connection cord
Expected: Properly connected to monitor

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

CCO AP SENSOR ERROR

ProAQT sensor not connected properly or sensor is faulty.

Ranked causes

1. ProAQT sensor not connected to sensor cable (common)
2. ProAQT sensor faulty (occasional)

First check

Verify ProAQT sensor connection

Test point: ProAQT sensor cable connector
Expected: Secure connection with click

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

CCO APCHECK SENSOR disconnected

ProAQT sensor or PiCCO catheter and injectate sensor disconnected from monitor.

Ranked causes

1. ProAQT sensor disconnected from sensor cable (common)
2. PiCCO catheter and/or injectate sensor disconnected (common)

First check

Verify ProAQT sensor connection

Test point: ProAQT sensor cable
Expected: Sensor firmly connected to cable

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

CCO CHECK PATIENT INFORMATION missing patient safety

Patient demographic data (gender, age, BSA) not entered or out of valid range for CCO calculation.

Ranked causes

1. Patient gender, age, or BSA not entered (common)
2. Patient information out of range (occasional)

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

More symptoms

CCO CONNECTOR OFF disconnected
CCO ZERO UNSTABLE
CO CHECK SENSOR disconnected
CO2 external device disconnected or interface error
EEG external device failure
FiO2 value is randomly unstable
GAS CAL ERROR message displayed
GAS CHECK EXTERNAL DEVICE Termination message
GAS OUT OF RANGE silence alarm
GAS UNSPECIFIED ACCURACY on AG-920R
IBP PRESS OUT OF RANGE
IBP PRESS ZERO OUT OF RANGE
IRREGULAR RR MONITOR OFF message
NIBP AIR HOSE LEAK Silence alarm
NIBP CANNOT DETECT PULSE Silence alarm
NIBP CONNECTOR OFF Termination message
NIBP display appears, cuff inflates, pressure does not reach target
NIBP display area does not appear after air hose connected
NIBP MEAS TIMEOUT Silence alarm
NIBP SAFETY CIRCUIT RUNNING Re-alarm message
NIBP SYS OUT OF RANGE Silence alarm
Noise on blood pressure waveform
O2 CAL message displayed
O2 CONNECTOR OFF Termination message
O2 FiO2 connection error
Recorder shows INSERT REC PAPER message with paper properly set
RESP CHECK SENSOR - Respiration pickup damaged or disconnected
RESP CONNECTOR OFF - Respiration pickup disconnected (thermistor)
Respiration rate discrepancy from manual count
Respiration waveform does not appear; dashes displayed
SpO2 CHECK PROBE - Probe attachment and damage check (Nellcor/Masimo)
SpO2 CHECK PROBE - Probe not properly attached or damaged (NK)
SpO2 CONNECTOR OFF - Probe cable or adapter disconnected
SpO2-2 CONNECTOR OFF - SpO2-2 probe cable disconnected
SpO2-2 LOW QUALITY SIGNAL - Poor signal quality (NK/Masimo)
StO2 CHECK EXTERNAL DEVICE - Cerebral oximeter disconnected or communication error
StO2 CHECK EXTERNAL DEVICE - Cerebral/somatic oximeter disconnected
TB SIGNAL UNSTABLE
tcPO2/PCO2 CHECK
TEC DATA RECEIVE ERROR
Touch screen mark stays at particular pressed position
Touch screen mark stays out of acceptable range
Vital signs cannot be transmitted to ZS-900P receiver
A-FIB detected
Adjacent equipment causes malfunction
AG-400R CO2 unit appearance and physical check
Alarm indicator does not light
All ports display optional unit model numbers on MULTILINK CHECK
Appearance check failed
ASYSTOLE detected
Battery operation time shorter than expected
Battery operation with SB-671P pack
Battery weak
Bigeminy detected
BIS CHECK EXTERNAL DEVICE disconnected
BIS CHECKING IMPEDANCE
BIS MODULE FAILURE
BIS NOISE detected
BIS REPLACE SENSOR
BIS SENSOR ERROR
BIS SENSOR EXPIRED
Both display lamp and power lamp light
BYPASS activated
Calibration: AE-918P Neuro Unit ABR generator check
Calibration: BIS/BISx processor impedance check
Calibration: Cardiac output measurement
Calibration: CO2 gas accuracy check and sensitivity calibration
Calibration: CO2 partial pressure accuracy check
Calibration: Held pressure (cuff pressure maintenance)
Calibration: NIBP air circuit operation
Calibration: NIBP cuff pressure measurement
Calibration: NMT module electrical stimulation check
Calibration: Pressurization speed (adult/child mode)
Calibration: Pressurization speed (neonatal mode)
Calibration: Safety check measurements
Calibration: Safety circuit pressure release (adult/child mode)
Calibration: Safety circuit pressure release (neonatal mode)
Calibration: Solenoid valve operation (Step Deflation)
Calibration: Touch panel position incorrect
Cannot analyze ECG
Cannot measure FiO2, displays "---", O2 CHECK SENSOR message shown
Cannot measure IBP; dashes displayed and sensor check message
Cannot measure respiration, RESP CHECK SENSOR displayed
Cannot measure SpO2, CONNECTOR OFF or CHECK PROBE message displayed
Cannot measure Tb and Ti, displays "---", CO CHECK SENSOR message shown
Cannot recognize AY-600P series optional unit
CCO CHECK EXTERNAL DEVICE disconnected
CCO MODULE FAILURE
CCO ZERO IMBALANCE
CCO ZEROING COMPLETE
CHECK INPUT UNIT BATTERY
CO CHECK TEMPERATURE baseline
CO INJECT failure
CO INJECTION TIME OUT
CO2 absorbent needs replacement
CO2 adapter damaged
CO2 airway adapter disconnected
CO2 bath probe or inline sensor faulty
CO2 calibration failed
CO2 external device communication error
CO2 filterline not connected properly
CO2 sampling line blocked
CO2 sensor damaged
CO2 sensor insufficient light
CO2 sensor kit connector disconnected
CO2 thermodilution baseline error
CO2 unspecified operating environment
CO2 zero calibration not performed
Connector-off alarm verification
CPU RAM check failed
CPU ROM check failed
Display lamp does not light
Display lamp lights but power lamp does not light
ECG module malfunction
ECG pacing spike detected
ECG QRS amplitude too low
EEG connection cord disconnected
EEG connection cord re-seated during operation
EEG cord damaged
EEG cord disconnected from neuro unit
EEG differential offset voltage high
EEG electrode dry or not attached
EEG electrode lead poor contact
EEG module error
EEG neuro unit disconnected
Extended arrhythmia network communication lost
Flow tube disconnected from unit
Flow/Paw calibration error
Flow/Paw communication error with monitor
Flow/Paw measurement disabled in settings
Flow/Paw measurement out of range
FRAM check failed
GAS CAL COMPLETE message displayed
GAS CHECK SAMPLE LINE clogged
GAS DEVICE error - exhaust gas tube clogged
GAS MEASUREMENT setting not enabled
GAS OVERHEAT silence alarm on GF-210R/220R/310R/320R
GAS power indicator shows unit not powered
GAS PURGING in progress on AG-920R
GAS WARMING UP message displayed
Hard key function check failed
Heart rate not accurate
High frequency noise on ECG waveform with electrosurgical unit
High frequency noise on respiration waveform with electrosurgical unit
HIS SYNC ERROR Termination message
IBP CALIBRATING - Zero balance in progress
IBP LABEL ALREADY REGISTERED
IBP PRESS ZERO UNSTABLE
IMPEDANCE MEASUREMENT RESP OFF - Impedance respiration monitoring disabled
Impedance respiration waveform does not appear; RESP OFF message
INPUT UNIT DISCONNECT Termination message
Input unit not connected to main unit
MPU MODULE ERROR TEMP Silence alarm
MULTILINK CONFIG ERROR message displayed
MULTILINK CONFIG ERROR Re-alarm message
MULTILINK POWER ERROR message displayed
MULTILINK POWER ERROR Re-alarm message
NIBP CHECK INTERVAL SETTING Termination message
NIBP CUFF OCCLUSION Re-alarm message
NIBP DIA OUT OF RANGE Silence alarm
NIBP display appears, cuff does not inflate
NIBP HIGH CUFF PRESS Silence alarm
NIBP INFLATION during measurement
NIBP INFLATION PRESS LOW
NIBP MODULE ERROR Silence alarm
NIBP OUT OF RANGE Silence alarm
NIBP PLEASE WAIT message displayed
NIBP PROLONGED RR or Arrhythmia detected, uncalibrated
NO PACER PULSE ECG alarm
NO PCCO-AP Hemodynamic measurement error
No ports display optional unit model numbers on MULTILINK CHECK
No sound or small volume
Pacemaker interaction with cardiac monitoring
Page-dependent recording does not start at page top
PCCO CHECK EXTERNAL DEVICE Termination message
PCCO CHECK MODE Silence alarm
PM FAILURE Re-alarm message
Power cord safety check failed
QF/IF series interface connection status check
QI-670P interface connection and version check
RECEIVING DATA - Receiving data from defibrillator
Recorder door shows CLOSE PAPER MAGAZINE message when firmly closed
Remote controller key check failed
SAMPLE LINE pressurized on AG-920R
ScvO2 AMBIENT TEMP HIGH - CeVOX detects high ambient temperature
ScvO2 CAL ERROR - CeVOX calibration error
ScvO2 CONNECTOR OFF - CeVOX module not connected
ScvO2 LIGHT INTERFERENCE - CeVOX detects excessive ambient light
ScvO2 MODULE ERROR - CeVOX module internal error
ScvO2 OVERHEAT - CeVOX module overheated
ScvO2 SIGNAL TOO HIGH - CeVOX probe signal excessive
ScvO2 SIGNAL TOO LOW - CeVOX probe signal weak
ScvO2 WARMING UP - CeVOX module warming up
SENDING DATA - Input unit data transmission to central monitor
SENSOR ERROR COMPLETE - ProAQT sensor issue
SIMULATED DATA - Display showing simulated/demo data
Sound is distorted
Sound output check failed
SpO2 MODULE ERROR - SpO2 hardware malfunction (NK/Nellcor/Masimo)
SpO2 NO PROBE - SpO2 probe not connected to connection cord (NK)
SpO2 PROBE - Probe identification or integrity error (Masimo)
SpO2-2 CHECK PROBE - Probe attachment issue (NK)
SpO2-2 MODULE ERROR - SpO2-2 hardware malfunction (NK/Masimo)
SpO2-2 NO PROBE - SpO2-2 probe not connected to cord (NK)
SUSPEND MONITORING
Tb temperature outside measurable range
tcPO2/PCO2 ALARM
TD MEASUREMENT LIMIT
TD TEMP SENSOR ERROR
TD TIME OUT
TEC INTERFACE ALREADY CONNECTED
TEC INTERFACE DISCONNECTED
TEC INTERFACE ERROR
TEMP THIS LABEL IS ALREADY REGISTERED
THIS PARAMETER IS ALREADY REGISTERED
TI INJECTATE TEMP HIGH
Ti temperature outside measurable range
TOF ALARM
TOF CAL??
TOF CALERROR
TOF CHECK EXTERNAL DEVICE
TOF CHECK TEMP SENSOR
TOF COMMUNICATION ERROR
TOF LOW TEMPERATURE
TOF PLEASE WAIT
TOF PRE PTC RESPONSE DETECTED
TOF SIGNAL OUT OF RANGE
TOF SIGNAL TOO WEAK
TOF SUPRAMAXIMAL NOT FOUND
TRANSMITTER CONNECTOR OFF
Unit does not turn on in AC power operation
UPDATING DATA
USB mouse does not work with interface not in OPTIONS
USB mouse does not work with optical mouse LED off
USB mouse does not work with optical mouse LED on
VARIABLE PULSE RATE
VENT ALARM
VENT CHECK EXTERNAL DEVICE
Water in CO2 respiration circuit
Waveforms and grid have faint parts
Waveforms and numeric data record when paper pulled out manually
YJ-672P nurse call cable connection check
ZEROING COMPLETE
ZS-900P transmitter operational status check
ZS-900P transmitter signal reception verification

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

Error codes

Code	Meaning	Trigger	Severity
`A-FIB`	Arrhythmia detected on ECG	Abnormal heart rhythm detected during ECG analysis	critical
`ALARM RESET`	ALARM RESET function key was activated	ALARM RESET function key pressed during alarm reset condition	info
`ALARMS SILENCED`	Alarm sounds have been silenced	[Silence Alarms] key pressed or ALARM RESET function key touched	warning
`ALARMS SUSPENDED`	All alarms have been suspended	[Silence Alarms] key pressed twice or SUSPEND ALARMS key pressed	warning
`ALL ALARMS OFF`	All alarm functions have been disabled	ALARMS OFF key pressed or BYPASS key activated	warning
`ARRHYTHMIA ANALYSIS OFF`	Arrhythmia analysis function is disabled	SYSTEM SETUP window set to OFF for arrhythmia analysis	warning
`BATTERY WEAK`	Battery pack charge level critically low at approximately 25%	Battery pack reaches 25% charge level	warning
`BIS CHECK EXTERNAL DEVICE`	BIS monitor is disconnected from the bedside monitor	BIS interface cable disconnected	error
`BIS CHECKING IMPEDANCE`	BIS sensor impedance check in progress	Impedance verification routine running on sensor	info
`BIS CHECK SENSOR`	BIS sensor connection error or impedance issue	Patient interface cable disconnected or BIS sensor not attached properly	error
`BIS MODULE FAILURE`	BIS processor has encountered internal failure	BIS processor self-test failed or internal communication error	critical
`BIS NOISE`	Noise interference detected on BIS signal	Electrical or motion noise on BIS sensor signal	error
`BIS REPLACE SENSOR`	BIS sensor has exceeded maximum number of uses	Sensor usage counter exceeds manufacturer limit	warning
`BIS SENSOR ERROR`	BIS sensor failure detected	Sensor communication failure or self-test failure	error
`BIS SENSOR EXPIRED`	BIS sensor has passed its expiration date	Sensor expiration date exceeded during startup or during use	warning
`BISx CONNECTION CABLE`	BISx connection cable disconnected from monitor or damaged	BISx cable removed from monitor or connection failure detected	error
`BYPASS`	Alarm bypass mode activated	BYPASS key pressed during alarm condition	warning
`CANNOT ANALYZE`	ECG arrhythmia analysis cannot be performed	Excessive noise on ECG signal for more than 30 seconds	error
`CCO APCHECK SENSOR`	ProAQT sensor or PiCCO catheter cable disconnected from CO monitor	Sensor or cable removal from connection point detected	error
`CCO AP SENSOR ERROR`	ProAQT sensor connection error or sensor failure	Sensor not detected or communication failure with sensor	error
`CCO CHECK EXTERNAL DEVICE`	CCO monitor disconnected from bedside monitor	CCO interface cable disconnected	error
`CCO CHECK PATIENT INFORMATION`	Required patient demographic data missing or invalid for CCO calculation	Patient gender, age, or BSA not entered or values out of acceptable range	error
`CCO CHECK SENSOR`	FloTrac sensor disconnected, wrong type, or cable/sensor damaged	FloTrac sensor not detected or wrong sensor model selected	error
`CCO CHECK WAVEFORM`	Arterial waveform quality insufficient for reliable CO measurement	Arterial waveform signal degradation or IBP line issue	error
`CCO CONNECTOR OFF`	APCO/IBP processor is disconnected from monitor	APCO/IBP processor interface cable disconnected	error
`CCO MODULE FAILURE`	APCO/IBP processor is faulty and non-functional	Processor self-test failed or internal error detected	critical
`CCO UNSTABLE`	Arterial waveform too unstable for reliable CO measurement	Waveform instability detected over time	error
`CCO ZERO IMBALANCE`	Zero balance calibration not performed for APCO/IBP system	Zero balance adjustment required but not completed	error
`CCO ZEROING COMPLETE`	Zero balance adjustment successfully completed	Zero balance calibration routine finished	info
`CCO ZERO UNSTABLE`	Zero balance adjustment cannot complete due to circuit or pressure instability	Zero balance procedure initiated but cannot stabilize	error
`CHECK INPUT UNIT BATTERY`	Battery pack not inserted correctly in BSM-1700 series monitor	Battery pack not properly seated in battery compartment	error
`CO CAL COMPLETE (Sidestream)`	CO sidestream calibration completed successfully	Calibration procedure finished without errors	info
`CO CAL ERROR (Sidestream)`	CO sidestream calibration failed	Calibration procedure did not complete successfully	error
`CO CALIBRATING (Mainstream TG-950P/970P/980P)`	CO mainstream module in calibration; measuring reference light amount	Calibration procedure in progress	info
`CO CALIBRATING (Sidestream)`	CO sidestream module in calibration procedure	Calibration procedure in progress	info
`CO CAL? (Mainstream TG-950P/970P/980P)`	CO zero calibration not performed on mainstream module	System initialized without zero calibration on startup	error
`CO CELL OFF (TG-970P/980P)`	CO sensor airway adapter disconnected or CO2 cell offline	Airway adapter unplugged from sensor	warning
`CO CHANGE ABSORBENT (Sidestream)`	CO2 sidestream absorbent cartridge depleted and requires replacement	Absorbent material exhausted after extended use	warning
`CO CHANGE ADAPTER (Mainstream)`	CO mainstream adapter damaged or needs replacement	Adapter mechanical damage detected or functionality degraded	warning
`CO CHECK CO2 CELL (TG-950P/970P/980P)`	Water collected in respiration circuit; unable to measure CO2	Water accumulation detected in breathing circuit	error
`CO CHECK EXTERNAL DEVICE (Microcap/MicroPod/Termination)`	CO external instrument interface disconnected from monitor	Cable disconnected between CO2 unit and bedside monitor	error
`CO CHECK EXTERNAL DEVICE (Sidestream)`	AG-400R CO2 unit disconnected from monitor	AG-400R unit interface cable unplugged	error
`CO CHECK SENSOR`	CO connection cord disconnected or CO connection issue	CO connection cord removed from monitor interface	error
`CO CHECK SENSOR (Mainstream)`	CO mainstream sensor light level insufficient for measurement	Insufficient light reaching photodetector in sensor	error
`CO CHECK TEMPERATURE`	Injectate temperature baseline not detected during CO measurement	Temperature sensor not reading injectate temperature	error
`CO CONNECTOR OFF (Mainstream)`	CO sensor kit disconnected from monitor or connector damaged	Sensor kit cable unplugged or damaged connector	error
`CO DEVICE ERROR (Microcap/MicroPod/NanoPod)`	Communication error between external CO2 instrument and monitor	Communication link failure or timeout	error
`CO INJECT`	Injectate not injected or monitor does not acknowledge injection	Injectate not detected at sensor or monitor communication failure	error
`CO INJECTION TIME OUT`	Injectate not detected within 30 seconds after MANUAL key pressed	30-second timeout elapsed without injectate detection	error
`CO LINE BLOCK (Sidestream/Microcap/MicroPod/NanoPod)`	CO2 sampling line clogged; cannot measure CO2	Airway adapter, filterline, or exhaust tube blocked	error
`COMMUNICATION LOSS (System)`	Network communication failure between monitor and hub/central system	Network cable disconnected or communication link failure	error
`CONNECT INPUT UNIT (System)`	Input unit not connected to main monitor; transport function enabled but patient not ready	Input unit disconnected when monitor requires it for operation	error
`CO NO FILTERLINE (Microcap/MicroPod/NanoPod)`	CO2 filterline not connected to external instrument	Specified filterline not connected to external instrument port	error
`CO NO FILTERLINE (Sidestream)`	CO2 filterline not connected or disconnected from unit	Specified filterline not seated in CO2 unit connector	error
`CO OUT OF RANGE`	CO calculated value outside measuring range	Calculated CO value exceeds measurement limits	warning
`CO OUT OF RANGE (Mainstream TG-950P/970P/980P)`	CO measurement value exceeds valid measurement range	Calculated CO exceeds sensor measurement limits	warning
`CO PLEASE WAIT (Sidestream)`	CO2 calibration complete; calculation phase in progress	Zero balance calibration finished; calculation started	info
`CO PURGING LINE BLOCK (Sidestream/Microcap/MicroPod/NanoPod)`	CO2 sampling line purge in progress to clear blockage	System performing automatic purge cycle after clog detection	info
`CO SENSOR ERROR (Mainstream)`	CO mainstream sensor damaged or defective	Sensor hardware failure or signal loss	error
`CO Tb TEMP ERROR`	Blood temperature outside valid range for CO measurement	Blood temperature below 15°C or above 45°C	error
`CO THERMODILUTION ERROR`	CO thermodilution baseline error; returned too late to baseline curve	Return to baseline takes too long during thermodilution measurement	warning
`CO Ti TEMP ERROR`	Injectate temperature outside valid range for CO measurement	Injectate temperature not within manufacturer spec or room temp above 27°C	error
`CO UNSPECIFIED OPERATING ENVIRONMENT (TG-950P/970P/980P)`	CO module temperature or pressure exceeds operating limits	Operating environment outside specified temperature/pressure range	error
`CO WARMING UP (Microcap/MicroPod/NanoPod)`	CO2 external instrument warming up; measurement not possible	Device power-on initialization in progress	info
`CO WARMING UP (Sidestream)`	CO2 sidestream unit in warm-up phase; measurement not possible	Power-on warm-up cycle in progress	info
`CO ZERO CALIBRATING (Microcap/MicroPod/NanoPod)`	CO2 auto zero balance adjustment in progress	Device performing automatic zero calibration on startup or commanded	info
`CO ZERO CALIBRATING (Sidestream)`	CO2 sidestream zero calibration in progress	Zero calibration procedure initiated	info
`DIAG NG CHR`	FlashRom character area checksum error	Power-on self-test	critical
`DIAG NG DAT`	Setting value management data check error	Power-on self-test	error
`DIAG NG FRAM`	FRAM data area check error	Power-on self-test	critical
`DIAG NG INFO`	FlashRom information block checksum error	Power-on self-test	critical
`DIAG NG MAC`	MAC address not correct	Power-on self-test	error
`DIAG NG RAM`	SDRAM data area error	Power-on self-test	critical
`DIAG NG ROM`	FlashRom program area checksum error	Power-on self-test	critical
`DIAG NG RTC`	Date and real time clock IC error	Power-on self-test	error
`DIAG NG SD`	Memory card error or card not inserted at power-on	Power-on self-test	warning
`DIAG NG TCH`	Touch panel error detected	Power-on self-test	error
`ECG AUTO LEAD CHANGE (ECG)`	ECG auto lead change activated; lead electrode detached for >5 seconds	Electrode lead detached from patient when AUTO LEAD CHANGE is ON	warning
`ECG CHECK ELECTRODES (ECG)`	ECG electrode connection problem or configuration error	One or more electrode leads disconnected or contact failure	error
`ECG LEARNING (ECG)`	ECG module learning QRS waveform for arrhythmia analysis	QRS learning procedure initiated on startup or operator request	info
`ECG Low mV (ECG)`	ECG QRS signal amplitude too low for proper analysis	QRS peak voltage below minimum threshold for detection	warning
`ECG MODULE ERROR (ECG)`	ECG signal processing module malfunction	Module hardware or firmware error detected	critical
`ECG NOISE (ECG)`	High-amplitude noise corrupting ECG waveform	Excessive noise superimposed on ECG signal	warning
`ECG PACING (ECG)`	Paced QRS complex detected in ECG signal	Pacing spike and QRS detected when AUTO LEAD CHANGE ON	info
`EEG CALIBRATING (EEG)`	EEG window calibration in progress; calibration waveforms being generated	Calibration initiated via screen control	info
`EEG CHECK ELECTRODES (EEG)`	EEG electrode attachment problem; dry or improperly positioned	Electrode dry, degraded, or not firmly attached to patient	error
`EEG CHECK EXTERNAL DEVICE (EEG)`	EEG neuro unit disconnected from bedside monitor	Neuro unit cable unplugged or not fully seated	error
`EEG CONNECTOR OFF (EEG)`	EEG connection cord disconnected from neuro unit; connector damage possible	EEG connection cord unplugged or damaged connector	error
`EEG EXTERNAL DEVICE FAILURE (EEG)`	Neuro unit or multi-link instrument failure; faulty external device	Neuro unit or multi-link instrument malfunction detected	error
`EEG IMPEDANCE (EEG)`	EEG electrode impedance too high; signal quality degraded	Electrode impedance exceeds acceptable threshold	warning
`EEG MODULE ERROR (EEG)`	EEG signal processing module malfunction or firmware error	Module hardware or software error detected during operation	critical
`EEG RESETTING BASELINE (EEG)`	EEG waveform baseline being reset to center position	RESET key on EEG window touched	info
`ERROR`	Generic monitor error condition	Multiple possible internal faults	error
`FLOW CAL ERROR (FLOW/Paw)`	Flow and pressure calibration and zeroing failed	Calibration procedure unable to complete successfully	error
`FLOW CALIBRATING (FLOW/Paw)`	Flow and pressure module calibration or zeroing in progress	Calibration procedure initiated during startup or maintenance	info
`FLOW CHECK EXTERNAL DEVICE (FLOW/Paw)`	Communication error between Flow/Paw unit and bedside monitor	Communication link failure or timeout between unit and monitor	error
`FLOW CONNECTOR OFF (FLOW/Paw)`	Flow/Paw MEASUREMENT setting disabled in window configuration	MEASUREMENT parameter set to OFF in Flow/Paw window settings	info
`FLOW DEVICE ERROR (FLOW/Paw)`	Flow/Paw unit malfunction or defect detected	Unit self-test or operation reveals malfunction	error
`FLOW OUT OF RANGE (FLOW/Paw)`	Flow or pressure measured value exceeds valid measurement range	Sensor reading outside calibrated measurement limits	warning
`FRAM Check: Manage Table Error`	Set value check error detected in the management area	Power-on self-test or during operation	error
`FRAM Check: Setting Area Sum Error`	Set value check error detected in SUM check	Power-on self-test or during operation	error
`FRAM Check: Setting Table Size Error`	Set value check error detected in memory size check	Power-on self-test or during operation	error
`FREEZE (All parameters)`	All waveforms on display frozen; not updating in real-time	Freeze function activated or waveform update suspended	warning
`GAS CAL COMPLETE`	Air or gas calibration process successfully completed	Gas calibration routine finished on supported gas modules	info
`GAS CAL ERROR`	Gas calibration failed due to environmental contamination or equipment issue	Contaminated ambient air or gas leakage detected during calibration	error
`GAS CHECK EXTERNAL DEVICE`	Communication failure between external gas analysis module and monitor	Loss of communication signal between monitor and connected gas module	error
`GAS LINEBLOCK`	Line obstruction preventing proper gas sampling (water trap, sampling line, or exhaust tube blocked)	Flow or pressure sensor detects blockage anywhere in gas circuit	error
`GAS MEASUREMENT OFF`	GAS MEASUREMENT parameter disabled on gas measurement window	GAS MEASUREMENT setting switched to OFF	warning
`GAS MIXED GAS`	Two anesthetic agents detected simultaneously (incompatible with monitoring settings)	Sensor detects two distinct anesthetic agent concentrations above threshold	warning
`GAS OUT OF RANGE`	Measured gas concentration outside calibrated measurement range	Gas concentration exceeds upper or lower measurement limit	warning
`GAS OVERHEAT`	Gas module overheating condition detected (GF-210R/220R/310R/320R models)	Internal temperature exceeds safe operating limit	error
`GAS POWER OFF`	Gas module not receiving power from monitor	Power cord disconnected or loose connection	error
`GAS PURGING`	Automatic purging cycle in progress to clear sampling line obstruction (AG-920R)	Blockage detected; automatic purge cycle initiated	info
`GAS SAMPLE LINE BLOCK`	Sampling line clogged or kinked, restricting gas flow to sensor	Pressure or flow sensor detects obstruction in sampling pathway	error
`GAS UNSPECIFIED ACCURACY`	Measured gas value outside acceptable accuracy range (AG-920R)	Measurement accuracy degrades or operating conditions change	warning
`GAS WARMING UP`	Gas module undergoing warm-up cycle after power-up; not ready for measurement	Power applied to gas module; self-test and warm-up initiated	info
`GAS WATERTRAP ALERT`	Water trap missing, not properly attached, or clogged with water or sampling line issues	Water trap detection mechanism or flow sensor activated	error
`HIS SYNC ERROR`	HL7 interface configuration error preventing HIS synchronization	HL7 settings mismatch or incorrect network configuration	error
`IBP DISCONNECT SENSOR`	IBP transducer disconnected or not receiving signal	No IBP pulse and mean pressure detected	warning
`IBP LABEL ALREADY REGISTERED`	Duplicate IBP connection cord labels detected	More than one IBP cord with same label connected	warning
`IBP PRESS OUT OF RANGE`	IBP measurement exceeds measurable range	Blood pressure reading outside monitor range	warning
`IBP PRESS ZERO OUT OF RANGE`	Zero balance calibration out of acceptable range	Zero balance pressure reading not accurate	warning
`IBP PRESS ZERO UNSTABLE`	Zero balance adjustment unstable or drifting	Zero balance pressure value unstable or changing	warning
`IMPEDANCE MEASUREMENT RESP OFF`	Impedance respiration measurement disabled	<IMPEDANCE MEASUREMENT> parameter set to OFF when impedance method needed	info
`INPUT UNIT DISCONNECT`	Data acquisition or input unit not communicating with bedside monitor	Loss of communication link between input unit and main monitor	error
`IRREGULAR RR MONITOR OFF`	Arrhythmia detected on registered interbed monitor or interbed unit offline/disconnected	Arrhythmia signal received or network communication loss with interbed unit	warning
`MPU MODULE ERROR TEMP`	Temperature signal processor self-diagnostic failure; cannot cover full 0-45°C range	Temperature measurement self-test failed during periodic validation	error
`MULTILINK CONFIG ERROR`	Communication failure between QF/IF interface and monitor on multilink system	Loss of communication signal on multilink interface	error
`MULTILINK POWER ERROR`	Multi-link power supply failure preventing interface communication	Multi-link power supply voltage out of specification	error
`NIBP AIR HOSE LEAK`	Air hose disconnected or damaged, preventing cuff inflation or causing air leak	Loss of cuff pressure or no inflation pressure developing	error
`NIBP CANNOT DETECT PULSE`	Unable to detect patient pulse wave during NIBP measurement	Pulse wave amplitude below detection threshold during measurement cycle	warning
`NIBP CHECK INTERVAL SETTING`	NIBP measurement cannot restart after power interruption during auto/STAT/SIM measurement	Power loss and restoration during active measurement sequence	error
`NIBP CONNECTOR OFF`	Air hose disconnected from monitor, disabling NIBP function	Air pressure connection missing or disconnected	error
`NIBP CUFF OCCLUSION`	Cuff pressure not decreasing properly after NIBP measurement cycle completion	Residual pressure remains in cuff after deflation cycle	warning
`NIBP DIA OUT OF RANGE`	Measured diastolic blood pressure outside acceptable measurement range	Measured diastolic pressure exceeds lower or upper range limit	warning
`NIBP HIGH CUFF PRESS`	Excessive cuff pressure detected during measurement (patient movement or cuff malfunction)	Cuff pressure exceeds safe upper limit during inflation	warning
`NIBP INFLATION PRESS LOW`	Insufficient cuff inflation pressure at measurement start	Cuff inflation pressure below minimum required at cycle initiation	warning
`NIBP MEAS TIMEOUT`	NIBP measurement duration exceeded specification due to arrhythmia or noise interference	Measurement cycle time exceeded maximum allowed duration	warning
`NIBP MEASURING`	NIBP measurement in progress with automatic remeasurement due to artifact or cuff issue	Patient movement, weak pulse, cuff issue detected during measurement; retry initiated	info
`NIBP MODULE ERROR`	NIBP module hardware malfunction preventing blood pressure measurement	Internal module self-test failure or communication loss	error
`NIBP OUT OF RANGE`	Systolic or diastolic blood pressure measured outside monitor's acceptable range	Either measured pressure exceeds device measurement specification	warning
`NIBP PLEASE WAIT`	Cuff pressure not fully deflated before new measurement attempt	Cuff deflation incomplete; pressure still above minimum threshold	info
`NIBP SAFETY CIRCUIT RUNNING`	Safety protection activated due to improper measurement sequence or air circuit obstruction	Safety circuit detects abnormal condition during measurement	warning
`NIBP SYS OUT OF RANGE`	Measured systolic blood pressure outside monitor's acceptable range	Systolic pressure exceeds upper or lower measurement limit	warning
`NO PACER PULSE`	No pacemaker artifact detected in ECG or arrhythmia condition present	ECG signal analysis shows no pacemaker spikes or arrhythmia detected	warning
`NO PCCO-AP`	Pressure sensor not connected for PiCCO hemodynamic monitoring	Pressure sensor input not detected at module initialization	error
`O2 CAL`	Oxygen sensor calibration cycle in progress or calibration error detected	Calibration mode activated; sensor signal verification in progress or failed	warning
`O2 CONNECTOR OFF`	Oxygen sensor cable disconnected from monitor or cable damaged	No pressure signal from oxygen sensor connection	error
`PCCO CHECK EXTERNAL DEVICE`	PiCCO hemodynamic monitor disconnected or interface communication lost	Loss of communication with external PiCCO monitor unit	error
`PCCO CHECK MODE`	Pressure sensor type and PiCCO module technology mismatch preventing measurement	Sensor specification does not match selected measurement module/technology	warning
`PM FAILURE`	Data transmission failure between input unit and bedside/central monitor due to time zone mismatch	Time zone settings differ between transmitting and receiving monitor	warning
`PRINT ERROR`	Print operation failed	Print command to network printer failed	warning
`RESP CHECK SENSOR`	Respiration sensor check required	Respiration pickup damaged or disconnected	warning
`RESP CONNECTOR OFF`	Respiration connector disconnected	Respiration pickup disconnected from monitor	warning
`ScvO2 AMBIENT TEMP HIGH`	Ambient temperature exceeds safe operating range for CeVOX	Environmental temperature too high at module location	unknown
`ScvO2 CAL ERROR`	CeVOX ScvO2 calibration failed	ScvO2 calibration procedure failed or probe error detected	warning
`ScvO2 CONNECTOR OFF`	CeVOX module not properly connected	CeVOX module connector not seated or disconnected	warning
`ScvO2 LIGHT INTERFERENCE`	Excessive ambient light detected by CeVOX module	Ambient light level exceeds acceptable threshold at probe site	unknown
`ScvO2 MODULE ERROR`	CeVOX module internal hardware error	CeVOX module internal fault detected	error
`ScvO2 OVERHEAT`	CeVOX module internal temperature exceeded	CeVOX module internal temperature exceeds safe operating limit	warning
`ScvO2 SIGNAL TOO HIGH`	CeVOX signal strength excessive	Probe attached at inappropriate site for measurement	warning
`ScvO2 SIGNAL TOO LOW`	CeVOX signal strength too weak	Probe signal below minimum detection threshold	warning
`ScvO2 WARMING UP`	CeVOX module startup warm-up phase	CeVOX module is warming up after connection or power-on	info
`SENDING DATA`	Bedside monitor transmitting data to central monitor	Input unit transferred from one bedside monitor to another in network	info
`SENSOR ERROR COMPLETE`	ProAQT sensor expired or malfunction	ProAQT sensor reaches end of life or fails	warning
`SETLIB: Keycode Err`	Duplicate key code detected during copying set value	During set value copy operation	warning
`SIMULATED DATA`	Display showing simulated/demo patient data	<SIMULATION MODE> set to ON instead of OFF	warning
`SpO2-2 ALARM`	Pulse oximeter alarm condition on SpO2-2 channel	Alarm triggered on Nellcor or Masimo pulse oximeter module	unknown
`SpO2-2 CHANGE PROBE`	SpO2-2 probe deteriorated, damaged or short-circuited	Probe worn out, broken, or electrical malfunction	warning
`SpO2-2 CONNECTOR OFF`	SpO2-2 probe cable disconnected from cord	Probe cable or adapter disconnected from monitor socket	warning
`SpO2-2 DETECTING PULSE`	SpO2-2 searching for pulse waveform (NK/Masimo)	SpO2-2 module actively searching for pulse signal	info
`SpO2-2 DETECT PULSE`	Cannot detect pulse on SpO2-2 (Nellcor/Masimo)	SpO2-2 module unable to find pulse signal	warning
`SpO2-2 LIGHT INTERFERENCE`	Excessive light interference on SpO2-2 probe	Ambient light level exceeds SpO2-2 sensor threshold	unknown
`SpO2-2 LOW QUALITY SIGNAL`	SpO2-2 signal quality poor (NK/Masimo)	SpO2-2 measurement signal unstable or weak	warning
`SpO2-2 MODULE ERROR`	SpO2-2 hardware malfunction (NK/Masimo)	SpO2-2 module internal hardware failure detected	error
`SpO2-2 NO PROBE`	SpO2-2 probe not connected to cord (NK)	Probe not attached to SpO2 connection cord	critical
`SpO2-2 WEAK PULSE`	SpO2-2 weak pulse signal detection (NK/Masimo)	SpO2-2 pulse signal weak or marginal	warning
`SpO2 CHECK PROBE`	SpO2 probe attachment or damage check needed (NK)	Probe not properly attached or damaged detection	warning
`SpO2 CONNECTOR OFF`	SpO2 probe cable or adapter disconnected	Probe cable disconnected from adapter or adapter from socket	warning
`SpO2 DETECTING PULSE`	SpO2 system searching for pulse waveform	Sensor actively detecting pulse after probe attachment	info
`SpO2 LIGHT INTERFERENCE`	Excessive ambient light at SpO2 probe site	Light level exceeds acceptable threshold for SpO2 measurement	unknown
`SpO2 LOW QUALITY SIGNAL`	SpO2 signal quality poor due to motion or low perfusion	SpO2 waveform unstable or signal strength low	warning
`SpO2 MODULE ERROR`	SpO2 hardware malfunction	SpO2 module internal hardware failure	error
`SpO2 NO PROBE`	SpO2 probe not connected to connection cord (NK)	Probe connector not attached to SpO2 cord on monitor	critical
`SpO2 PROBE`	SpO2 probe identification or integrity error (Masimo)	Monitor cannot identify probe or probe damaged	error
`SpO2 WEAK PULSE`	SpO2 weak pulse signal from poor circulation or tight probe	Pulse signal strength below acceptable threshold	warning
`StO2 CHECK EXTERNAL DEVICE`	Cerebral/somatic oximeter disconnected or communication error	Cerebral/somatic oximeter not communicating with bedside monitor	warning
`SUSPEND MONITORING`	Patient monitoring has been suspended	SUSPEND MONITORING key touched	warning
`SYSTEM DOWN DATA ABORT/WP ERROR`	Unauthorized address was accessed	During system operation	critical
`SYSTEM DOWN PREFETCH ABORT`	Unauthorized instruction was fetched	During system operation	critical
`SYSTEM DOWN UNDEFINED INSTRUCTION`	Undefined instruction was given	During system operation	critical
`SYSTEM DOWN ZERO DIVIDE`	Division by zero error	During system operation	critical
`SYSTEM ERROR`	General system error with unspecified large classification	During system operation	error
`SYSTEM ERROR FILE CREATION`	File cannot be properly created	During data logging or file operation	error
`SYSTEM ERROR LIBRARY RUNTIME`	Library runtime error occurred	During system operation	error
`SYSTEM ERROR SD CARD TRANSFER`	SD card transfer task error occurred	During memory card data transfer	error
`TB SIGNAL UNSTABLE`	Unstable temperature signal in hemodynamic monitoring unit	TD curve error or baseline error due to unstable Tb signal	warning
`tcPO2/PCO2 ALARM`	Transcutaneous oxygen and carbon dioxide monitor alarm	Alarm condition detected on transcutaneous monitor	warning
`tcPO2/PCO2 CHECK`	Communication check failure for transcutaneous gas monitor	Disconnection or communication error between transcutaneous monitor and bedside monitor	error
`TD MEASUREMENT LIMIT`	Maximum number of thermodilution measurements reached	Storage limit for TD measurements exceeded	warning
`TD TEMP SENSOR ERROR`	Injectate temperature sensor malfunction on hemodynamic unit	Sensor error detected	error
`TD TIME OUT`	Thermodilution measurement timeout	No injection detected within expected time window	warning
`TEC DATA RECEIVE ERROR`	Communication error receiving data from defibrillator	Defibrillator data transmission failure to bedside monitor	error
`TEC INTERFACE ALREADY CONNECTED`	Two defibrillator interfaces connected simultaneously	More than one QI-670P interface connected to monitor	error
`TEC INTERFACE DISCONNECTED`	QI-670P defibrillator interface USB cable disconnected	USB cable not connected to monitor	error
`TEC INTERFACE ERROR`	Communication error with QI-670P defibrillator interface	Communication failure between QI-670P interface and monitor	error
`TEMP CHECK`	Temperature probe or connection error	Temperature sensor disconnection or malfunction	warning
`TEMP THIS LABEL IS ALREADY REGISTERED`	Duplicate temperature probe label	More than one temperature probe with the same label detected	warning
`THIS PARAMETER IS ALREADY REGISTERED`	Exceeds specified number of channels for a parameter	More than specified number of parameter channels are activated	warning
`TI INJECTATE TEMP HIGH`	Injectate temperature too warm for thermodilution measurement	Injectate temperature warmer than blood temperature	warning
`TOF ALARM`	Neuromuscular transmission monitoring device error	Error detected on NMT monitoring device	warning
`TOF CAL??`	NMT module not calibrated	Calibration not yet performed on NMT module	warning
`TOF CALERROR`	NMT module calibration failure	Calibration procedure failed on NMT module	error
`TOF CHECK EXTERNAL DEVICE`	NMT monitoring device disconnected from bedside monitor	NMT device communication loss with main monitor	error
`TOF CHECK SENSOR`	NMT sensor cables or electrodes not connected	Main cable, stimulation cable, electrodes or acceleration transducer disconnection	error
`TOF CHECK TEMP SENSOR`	NMT temperature sensor not connected	Temperature sensor disconnection detected	error
`TOF COMMUNICATION ERROR`	Communication error between NMT module and bedside monitor	Communication failure with NMT module	error
`TOF LOW TEMPERATURE`	Body temperature too low for NMT monitoring	Body temperature below 32°C (89.6°F)	warning
`TOF PLEASE WAIT`	Insufficient interval between NMT stimulation cycles	Stimulation applied within 2 minutes of previous measurement	info
`TOF PRE PTC RESPONSE DETECTED`	Vital reaction detected before post-tetanic potentiation	Patient response detected before PTC phase	warning
`TOF SIGNAL OUT OF RANGE`	Temperature sensor reading outside measurable range	Temperature measurement outside 20.0 to 42.5°C range	error
`TOF SIGNAL TOO WEAK`	Acceleration signal during NMT measurement too weak	Signal amplitude below threshold during measurement	warning
`TOF SUPRAMAXIMAL NOT FOUND`	Supramaximal stimulation current cannot be determined	Failed to establish supramaximal current during calibration	error
`TRANSMITTER CONNECTOR OFF`	Wireless transmitter cable disconnected from monitor	Transmitter connection cord not connected to monitor	error
`UPDATING DATA`	Parameter update in progress on trend screen	Parameter being changed on trend screen	info
`VARIABLE PULSE RATE`	SVV (Stroke Volume Variation) measurement may not be reliable	Patient pulse rate is variable or unstable during measurement	warning
`VENT ALARM`	Alarm occurring on connected ventilator	Alarm condition detected on ventilator device	warning
`VENT CHECK EXTERNAL DEVICE`	Ventilator disconnected or communication error	Ventilator communication loss with bedside monitor	error
`ZEROING COMPLETE`	Hemodynamic pressure zero adjustment completed successfully	Zero adjustment procedure completed	info

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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.