Patient monitors · Life Scope family

Nihon Kohden CSM-1901: troubleshooting and error codes

The ServiceForge knowledge base holds 439 documented symptoms for the Nihon Kohden CSM-1901, with 811 ranked causes, 373 diagnostic checks with test points and expected values, and 292 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Hum noise interference in EEG waveform

Visible AC hum or electrical noise in the EEG waveform

Ranked causes

1. The electrode lead is damaged (occasional)
2. The Z electrode is not attached to the patient (AE-918P) or Cz and Z electrodes not attached (AE-920P) (common)
3. Electrodes 1 and 2 or the EEG1 (+) and (-) electrodes are not attached (common)
4. If the bed is metal, the bed is not grounded (occasional)
5. The provided power cord is not used (occasional)
6. Several medical devices are used on the patient (occasional)
7. There is an AC outlet or table tap near the patient or bed (occasional)
8. A desk lamp or fluorescent light is turned on (occasional)
9. The patient is touching some metal part (occasional)
10. An electric blanket is used (occasional)
11. There is a cell phone or radio near the patient (occasional)
12. The electrodes are not properly attached to the patient's head (AE-120A) (common)
13. The electrodes are not properly connected to the EEG head set (AE-120A) (common)

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

ECG noise

ECG baseline unstable with artifact, may be from respiration, body movement, EMG, electrode issues, or electromagnetic interference

Ranked causes

1. Baseline instability from respiration or body movement (common)
2. EMG noise superimposed (common)
3. Electrode lead pulled (occasional)
4. Electrode dry or poor contact (common)
5. Electrode lead clip poor contact (occasional)
6. High contact resistance between skin and electrode (occasional)
7. Electromagnetic interference from electric blanket (occasional)
8. Noise from ESU (Electrosurgical Unit) (occasional)
9. Inadequate equipotential grounding (occasional)

First check

Assess electrode site for body movement

Test point: Electrode position on patient
Expected: Site selected with minimal body movement

8 more checks with pass and fail actions, 9 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Check electrodes

ECG electrode connection problem: lead disconnected, electrode detached, cord disconnected, or poor contact between clip and electrode

Ranked causes

1. Operator disconnected electrode lead or ECG cord (common)
2. Electrode lead detached from electrode (common)
3. Electrode cannot attach firmly to skin (common)
4. Electrode lead disconnected from ECG connection cord (occasional)
5. Poor contact between electrode clip and electrode (occasional)
6. Electrode lead damaged (occasional)
7. Different electrode types used together (rare)
8. Polarization voltage too high (rare)

First check

Verify ECG lead connections to monitor

Test point: ECG connection port at monitor
Expected: All ECG leads firmly connected

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

SpO2 low quality signal

SpO2 probe signal quality degraded due to patient movement, low pulse, ESU, or light

Ranked causes

1. Patient body movement (common)
2. Low pulse rate (occasional)
3. Respiratory fluctuation (occasional)
4. Probe not attached properly (common)
5. During IABP procedure (occasional)
6. Electrosurgical unit (ESU) in use (occasional)
7. Probe exposed to strong ambient light (occasional)
8. Measurement during CPR (rare)

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

EEG electrode check needed

Screen message 'Silence EEG Check Electrodes1' appears; poor signal quality

Ranked causes

1. Electrode attachment failure (common)
2. Electrode lead disconnected from EEG cord (common)
3. Poor electrode lead clip contact (occasional)
4. Electrode lead damaged (occasional)
5. Abnormal polarization voltage (occasional)
6. Electrode impedance too high (common)
7. EEG cord temporarily disconnected and reconnected (occasional)

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

SpO2 value is unstable

Oxygen saturation reading fluctuates or varies excessively on display

Ranked causes

1. Probe size inappropriate for patient (common)
2. Probe on limb with NIBP cuff or measurement catheter (common)
3. Measuring at site with large blood flow fluctuation (occasional)
4. Electrosurgical unit (ESU) interference (occasional)
5. Probe not attached at appropriate site (common)
6. Probe deteriorated or damaged (occasional)
7. Measuring on venous pulse (rare)

First check

Verify probe size matches patient limb

Test point: Probe and patient limb circumference
Expected: Probe appropriate size for patient

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

Arterial blood pressure cannot be measured patient safety

Arterial pressure monitoring system does not produce valid blood pressure measurements via hemodynamic unit.

Ranked causes

1. Measurement data is out of range (common)
2. Blood pressure transducer malfunction (occasional)
3. Connection cable is damaged (occasional)
4. Transducer not appropriate for technology used (occasional)
5. Technology settings are incorrect on bedside monitor (common)
6. Unspecified transducer is used (common)

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

Gas module malfunction or power issue

Gas module displays 'Gas Device Failure' termination message or 'Check GAS Device' silence message due to hardware or power failure

Ranked causes

1. Gas module hardware failure (rare)
2. Power cord disconnected (AG-920RK, GF-200/GF-300 series) (occasional)
3. Measurement switch turned off (common)
4. Gas Measurement set to Off in menu (GF-100/GF-200/GF-300) (occasional)
5. Multi-link or connection cable disconnected (common)
6. Communication error between unit and monitor (occasional)

First check

Verify measurement switch status on unit

Test point: Measurement switch on gas module
Expected: Switch in ON position

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

Measured value of gas is low

Gas concentration measurement (e.g., CO2, N2O, O2) displays lower value than expected clinically.

Ranked causes

1. Sampling gas leaking from sampling line or T-piece (common)
2. Unspecified sampling line is used (common)
3. Patient ventilation is poor (occasional)
4. Measurement sensitivity is inaccurate (occasional)
5. Abnormality in anesthetic machine (occasional)
6. Multigas unit is faulty (rare)

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

SpO2 value on bedside monitor and CO oximeter do not match patient safety

Discrepancy between SpO2 reading on patient monitor and external CO oximeter measurement

Ranked causes

1. Probe not attached properly - emitter and detector misaligned (common)
2. Attachment site inappropriate for probe type (common)
3. Measuring site not clean (common)
4. Abnormal hemoglobin present (rare)
5. Dye injected in blood (rare)
6. SpO2 measured during CPR (rare)

First check

Verify probe emitter and detector alignment

Test point: SpO2 probe attachment on patient
Expected: Emitter and detector directly facing each other

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

The waveform is not stable

EEG waveform appears unstable, fluctuates, or cannot maintain consistent baseline

Ranked causes

1. Electrode Z not attached (AE-918P) or Cz and Z not attached (AE-920P) (common)
2. Electrodes 1 and 2 or the EEG1 (+) and (-) electrodes are not attached (common)
3. New and old electrodes or different types of electrodes are used together (occasional)
4. Insufficient paste remaining on the disposable EEG electrodes (AE-120A) (common)
5. The belts are not fastened (AE-120A) (occasional)
6. A belt is loose (AE-120A) (occasional)

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

WLAN transport does not start

Wireless LAN transport fails to initialize between monitors

Ranked causes

1. Central and bedside monitors have different software versions (common)
2. Incompatible host monitor connected (occasional)
3. Host monitor data saved in incompatible central monitor (occasional)
4. Incorrect transport settings on host monitor (common)
5. Incorrect transport settings on BSM-1700 bedside monitor (common)
6. QI-170P wireless LAN station not mounted on BSM-1700 (occasional)

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

Accuracy of airway volume measurements is low

Airway volume data shows poor accuracy or appears unreliable.

Ranked causes

1. Flow gas is leaking (common)
2. Water droplets on flow tube (occasional)
3. Temperature and humidity settings not set on bedside monitor (occasional)
4. Gas composition not set on bedside monitor (occasional)
5. Multigas/flow unit is faulty (rare)

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

Cursor position misaligned or shaking on LCD

Cursor position misalignment or shaking observed on VL-190P LCD unit screen

Ranked causes

1. Metal objects or cables near screen (common)
2. Two displays located too close together (occasional)
3. Core unit and LCD unit not docked properly or cable disconnected (common)
4. Screen dirty (common)
5. Touch panel cleaned with unspecified cleaners containing antistatic agents (occasional)

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

ECG learning in progress

ECG learning process is running, system awaits completion before analysis can proceed

Ranked causes

1. Learning process initiated or in progress (common)
2. Immediately after starting measurement (common)
3. Lead change in ECG settings (occasional)
4. After patient admission (common)
5. Check Electrodes message appeared and cleared (occasional)

First check

Monitor system status for learning completion

Test point: ECG window display
Expected: Learning process complete, analysis enabled

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

Hemodynamic unit measurement data not displayed on bedside monitor

Hemodynamic data from AP-170P hemodynamic unit does not appear on bedside monitor display.

Ranked causes

1. Necessary settings are not set on bedside monitor (common)
2. Multi-link cable is not connected (common)
3. Hemodynamic unit detected error and operation recovered (occasional)
4. Bedside monitor software version incompatible with hemodynamic unit (rare)
5. Hemodynamic unit is malfunctioning (rare)

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

IBP measured value differs from estimated value

Invasive blood pressure reading does not match expected or calculated pressure value

Ranked causes

1. Air bubbles in measurement circuit (common)
2. Extra tube connected in circuit (occasional)
3. Blood pressure transducer position inappropriate (occasional)
4. Blood pressure transducer with different sensitivity used (rare)
5. Zero balance adjustment needed (common)

First check

Inspect measurement circuit for air bubbles

Test point: Transducer line and circuit tubing
Expected: No visible air bubbles in tubing

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

SpO2 check probe

SpO2 probe not attached properly or probe damaged/short-circuited

Ranked causes

1. Probe not attached to patient properly (common)
2. Poor connector contact (occasional)
3. Probe damaged or short-circuited; pulse waveform flat (occasional)
4. Probe not at appropriate site; waveform displayed (common)
5. Probe deteriorated; waveform displayed (occasional)

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

SpO2 connector off

SpO2 connection cord removed or disconnected from SpO2 socket of input unit

Ranked causes

1. SpO2 connection cord removed (common)
2. SpO2 connection cord disconnected (common)
3. SpO2 connection cord faulty (occasional)
4. Probe not properly connected to patient cable (occasional)
5. Monitor cannot identify probe (occasional)

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

Warming up message does not disappear

The Warming up message persists on display longer than normal or indefinitely after power-on.

Ranked causes

1. Unit is still warming up normally (common)
2. Sampling line or exhaust gas tube is bent (occasional)
3. Water trap or sampling line is kinked or blocked (occasional)
4. Exhaust gas tube directly connected to facility scavenging system (occasional)
5. Multigas unit is faulty (rare)

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

AC interference on ECG waveform

50/60 Hz noise visible as regular oscillations on ECG trace

Ranked causes

1. Electric blanket in use (occasional)
2. Electrode dry or poor attachment to skin (common)
3. Filter set to Diag instead of Mon or Max (common)
4. Bedside monitor and external instruments not grounded properly (occasional)

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

AE-120A EEG head set electrode impedance high or disconnected patient safety

Silence EEG Check Electrodes message; electrode not contacting scalp, lead disconnected, or impedance too high

Ranked causes

1. No gel in contact with electrode (common)
2. Electrode lead not connected to head set (common)
3. Electrode paste not adhering to scalp or electrodes not securely attached (common)
4. Electrode paste dried out or electrodes came off (occasional)

First check

Visual inspection of electrode gel contact

Test point: Electrode Z and other electrodes on patient scalp
Expected: Gel visibly in contact with scalp at all electrode locations

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

Baseline wandering on ECG

ECG baseline drifts or moves up and down, obscuring the trace

Ranked causes

1. Baseline unstable due to respiration or body movement (common)
2. Electrode dry (common)
3. High contact resistance between skin and electrode (common)
4. Filter set to Diag instead of Mon or Max (occasional)

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

Bedside monitor cannot connect to network

Network connectivity failure; monitor not appearing on central monitor or unable to establish link

Ranked causes

1. Network cable not connected properly (common)
2. Network settings incorrect (common)
3. Monitor not selected as monitored bed on central monitor (common)
4. Network cable or hub faulty (occasional)

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

BIS Check Sensor message (BIS Processor/BISx) patient safety

Silence alarm, BIS sensor, interface cable, or digital converter disconnected or impedance too high.

Ranked causes

1. Digital signal converter disconnected from PIC Plus interface (common)
2. BIS sensor disconnected from interface cable (common)
3. BIS sensor physically disconnected from patient (common)
4. BIS sensor impedance too high (occasional)

First check

Verify digital converter to PIC Plus cable connection

Test point: Light gray connectors
Expected: Converter light gray side connected to cable light gray side

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

Blood pressure data differs from expected value patient safety

Arterial pressure measurement on bedside monitor does not match expected clinical value or other reference measurements.

Ranked causes

1. Air bubble in blood pressure circuit (common)
2. Extra tube connected to blood pressure circuit (occasional)
3. Blood pressure transducer is not positioned correctly (common)
4. Other causes requiring zero adjustment (occasional)

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

CCO sensor connection error

Screen message 'Termination CCO Check Sensor' appears; no CCO output

Ranked causes

1. Connection cable disconnected from APCO/IBP processor (common)
2. Flo Trac cable or sensor faulty (occasional)
3. Non-Nihon Kohden sensor in use (occasional)
4. Internal system failure (rare)

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

CO Unstable Baseline message patient safety

Physiological change, respiration, injection interval, or external noise affecting baseline.

Ranked causes

1. Physiological change affecting baseline (common)
2. Patient on mechanical respiration (occasional)
3. Injection interval too short (occasional)
4. Noise interference from external instruments (occasional)

First check

Assess injectate temperature and volume

Test point: Injectate bath and syringe
Expected: Cool temperature and adequate volume (10 mL for adults)

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

CO2 check sensor alarm

CO2 sensor measurement signal insufficient or sensor deterioration detected

Ranked causes

1. Insufficient sensor light; water in respiration circuit (common)
2. CO2 sensor requires cleaning (common)
3. Airway or nasal adapter faulty or contaminated (occasional)
4. Light emitter deteriorated (occasional)

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

CO2 measured value displayed as dashes

CO2 value shows '---' on monitor display instead of numeric value

Ranked causes

1. Fewer than three respirations detected (common)
2. Respiration not detected for 40+ seconds (occasional)
3. Zero calibration in progress (occasional)
4. HFO ventilation in use (rare)

First check

Count patient respirations

Test point: Patient breathing pattern
Expected: Three or more breaths detected

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

CO2 measured value is inaccurate

CO2 reading does not match expected values or shows instability

Ranked causes

1. Airway adapter is dirty or degraded (common)
2. Patient respiration rate very high or irregular (occasional)
3. Suction catheter in airway adapter during measurement (occasional)
4. Respirator oscillation (occasional)

First check

Inspect airway adapter condition

Test point: Airway adapter
Expected: Clean, intact adapter with no debris

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

CO2 measured value is low

End-tidal CO2 reading lower than expected on mainstream CO2 sensor

Ranked causes

1. CO2 mixed in inspiration (common)
2. Low atmospheric pressure at high altitude (occasional)
3. Zero calibration not performed (common)
4. Incorrect respiration circuit type (occasional)

First check

Verify CO2 sensor type and inspired gas composition

Test point: Monitor display
Expected: Correct sensor kit installed per manual

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

Data send error to central monitor

Network connection or configuration issue prevents sending data to central monitoring system

Ranked causes

1. Network cable not properly connected (common)
2. Incorrect network settings (occasional)
3. Bedside monitor not selected as monitored bed (occasional)
4. Network cable damaged or hub faulty (rare)

First check

Verify network cable connection to bedside monitor

Test point: Monitor network port
Expected: Network cable firmly connected

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

Flow/Paw device check needed

Screen message 'Termination Flow/Paw Check Device' appears

Ranked causes

1. Flow/Paw measurement switch off (common)
2. Connection cable disconnected (common)
3. Communication error between unit and core (occasional)
4. Power cord disconnected (common)

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

Gas calibration error

Gas module displays 'Silence Gas Cal Error' message; air or gas calibration failed

Ranked causes

1. Sampling line or exhaust gas tube bent or clogged (common)
2. Contaminated air around unit (occasional)
3. Gas value outside air calibration range (rare)
4. Calibration failed; low gas cylinder pressure (AG-920RK, GF-100 series) (occasional)

First check

Inspect sampling line and exhaust tube for obstruction or bending

Test point: Entire length of sampling line and exhaust tube
Expected: Tubing straight and unobstructed

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

Heart rate inaccurate patient safety

ECG monitor displays incorrect heart rate value or unstable rate readings

Ranked causes

1. QRS amplitude too small (common)
2. QRS not detected correctly (common)
3. Lead or electrode position suboptimal for QRS detection (common)
4. Pacing detection setting inappropriate (occasional)

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

Injectate or blood temperature cannot be measured

Temperature measurement system in hemodynamic unit does not measure or display injectate or blood temperature values.

Ranked causes

1. Measurement data is out of range (common)
2. Catheter or cable is disconnected (common)
3. Catheter is not Nihon Kohden specified (occasional)
4. Technology settings are incorrect (occasional)

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

Measured value of gas is high

Gas concentration measurement displays higher value than expected clinically.

Ranked causes

1. Unspecified sampling line is used (common)
2. Measurement sensitivity is inaccurate (occasional)
3. Abnormality in anesthetic machine (occasional)
4. Multigas unit is faulty (rare)

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

NIBP abnormal measurement results displayed patient safety

Blood pressure measurement values are inconsistent, unrealistic or irregular on display

Ranked causes

1. Cuff size incorrect for patient (common)
2. Cuff wrapped incorrectly around arm (common)
3. Body movement or severe arrhythmia during measurement (occasional)
4. Measuring on wrong arms (common)

First check

Verify cuff size appropriate for patient limb

Test point: Cuff and patient arm circumference
Expected: Cuff size matches patient arm measurement

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

Oxygen sensor uncalibrated or past end of life

FiO2 module displays '— O2 Uncal' message; sensor not calibrated or reached end of service life

Ranked causes

1. Oxygen sensor reached end of life (occasional)
2. Oxygen sensor not connected properly; unstable signal during calibration (common)
3. Incorrect calibration method selected (occasional)
4. Oxygen sensor not yet calibrated (common)

First check

Verify oxygen sensor connection to FiO2 cord

Test point: Oxygen sensor connector and cord
Expected: Sensor fully seated and locked in connector

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

Pacing detected

Pacemaker-like complexes detected by the monitor

Ranked causes

1. Patient has pacemaker (expected) (common)
2. Patient does not have pacemaker (occasional)
3. Electric blanket causing false pacing detection (occasional)
4. Monitoring neonate ECG (occasional)

First check

Confirm patient has pacemaker

Test point: Patient medical history and chart
Expected: Pacemaker implant confirmed if present

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

Remote control does not function

Remote control fails to operate or control the bedside monitor

Ranked causes

1. Batteries not inserted or polarity incorrect (common)
2. Remote control batteries weak (common)
3. Wrong bed selected (common)
4. Remote control display number incorrect (common)

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

Respiration waveform and rate unstable (impedance method)

Respiratory impedance signal and rate readings are inconsistent or fluctuate

Ranked causes

1. Electrode positions inappropriate for respiration measurement (common)
2. Electrode contact poor (common)
3. Resp-Imp Noise Reduction off and waveform amplitude too small (occasional)
4. Resp-Imp Noise Reduction on and respiration-heart rate timing coincide (occasional)

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

Respiration waveform not displayed (impedance method)

Respiratory impedance measurement does not produce waveform on display

Ranked causes

1. Resp-Imp Measurement set to Off (common)
2. Electrodes, leads, or ECG connection cord not connected properly (common)
3. Electrode dry or poor attachment to skin (common)
4. High contact resistance between skin and electrode (common)

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

SpO2 cannot detect pulse patient safety

SpO2 unable to detect pulse wave; peripheral circulation insufficient

Ranked causes

1. Insufficient peripheral circulation for SpO2 measurement (common)
2. Probe attached too tightly; obstructing circulation (common)
3. Probe not attached to patient properly (common)
4. Related alarms ('Light Interference', 'Check Probe Site', 'Detecting Pulse') (occasional)

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

SpO2 probe failure

SpO2 probe is damaged, short-circuited, or connection cord is faulty

Ranked causes

1. Probe damaged (occasional)
2. Probe short-circuited (occasional)
3. SpO2 connection cord faulty (occasional)
4. Probe faulty; replace cord if problem persists (occasional)

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

SpO2 signal level degradation or probe attachment issue patient safety

Probe attachment is improper or signal degradation is detected when checking SpO2 signal level with AY-661P or AY-663P probe

Ranked causes

1. Attachment site is thick (common)
2. Probe is deteriorated (occasional)
3. Probe is deteriorated or damaged (occasional)
4. Attachment site is cold or probe attached too tightly (occasional)

First check

Connect SpO2 probe to unit

Test point: SpO2 input connector
Expected: Probe properly connected

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

The 12-lead analysis result is not correct patient safety

12-lead ECG analysis produces inaccurate or incorrect interpretation results

Ranked causes

1. There was body movement when the waveforms for analysis were taken in (common)
2. Electrodes were detached (common)
3. The patient's gender is not entered for the patient information (occasional)
4. The patient's date of birth is not entered for the patient information (occasional)

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

The waveform or measured value is not displayed

EEG waveform or parameter values missing from screen despite unit connection

Ranked causes

1. The multi-link cable is not connected properly (common)
2. The software does not support this unit (rare)
3. The screen layout is Fixed and the parameter is not set to display (common)
4. The disposable EEG electrodes are not applied or are detached (AE-120A) (common)

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

Ventilator measured value not displayed

Ventilation data from connected ventilator does not appear on bedside monitor display.

Ranked causes

1. Ventilator not connected to bedside monitor properly (common)
2. Interface or cable connected to wrong socket on ventilator (common)
3. Communication settings do not match (common)
4. Measured value is out of display range (occasional)

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

Accuracy of C and R measurements is low

Compliance and airway resistance values show poor accuracy or appear unreliable.

Ranked causes

1. Patient has spontaneous breathing (common)
2. Auto PEEP is applied (occasional)
3. Flow gas is leaking (occasional)

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

Anesthetic gas measuring accuracy not within acceptable range patient safety

CO2, O2, N2O, or isoflurane concentration values displayed on bedside monitor fall outside specified tolerance margins during calibration gas flow.

Ranked causes

1. Calibration gas cylinder pressure too low (common)
2. Multigas unit requires gas calibration after accuracy check failure (common)
3. Water trap or sampling line connection improper or contaminated (occasional)

First check

Check flow regulator pressure meter reading

Test point: Pressure meter on flow regulator
Expected: 0.1 MPa or higher, ≥0.1 MPa

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

BIS Connector Off message (BIS Processor/BISx) patient safety

Termination alarm, BIS digital signal converter cable or connection cord disconnected.

Ranked causes

1. Digital signal converter cable disconnected from module (common)
2. BIS parameter connection cord disconnected (common)
3. Connection cord faulty (occasional)

First check

Verify digital signal converter cable to module

Test point: Converter cable (dark gray) at module
Expected: Cable fully seated on module connector

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

BIS monitor measured value not displayed

Bispectral index value when connecting standalone BIS monitor does not appear on bedside monitor

Ranked causes

1. BIS monitor not connected to bedside monitor properly (common)
2. Interface connected to wrong socket on BIS monitor (common)
3. Communication settings do not match (occasional)

First check

Verify BIS monitor connected via QF interface to bedside monitor

Test point: QF series interface connectors at both units
Expected: QF interface properly connected between BIS monitor and bedside monitor per manual

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

BIS Sensor Failure message (BIS Processor/BISx) patient safety

Silence alarm, water on sensor, sensor dirty, or BIS sensor faulty.

Ranked causes

1. Water on BIS sensor (occasional)
2. BIS sensor dirty (occasional)
3. BIS sensor faulty (occasional)

First check

Inspect BIS sensor surface for moisture or contamination

Test point: Sensor electrodes and adhesive
Expected: Dry, clean sensor surface

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

Cannot measure CO2 with sidestream AG-400RK unit

CO2 value cannot be obtained when using AG-400RK sidestream unit

Ranked causes

1. FilterLine is clogged (common)
2. Exhaust gas adapter is clogged (common)
3. CO2 unit is faulty (rare)

First check

Inspect FilterLine for blockage

Test point: FilterLine
Expected: Clear, unobstructed flow path

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

Cannot measure NIBP - general failure

Non-invasive blood pressure measurement fails to complete or obtain results

Ranked causes

1. Noise interference preventing pressure calculation (occasional)
2. Air hose bent or squeezed (common)
3. Cuff worn out or damaged (common)

First check

Inspect air hose for obstructions or damage

Test point: Air hose along entire length
Expected: Hose straight, unfolded, free of bends or kinks

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

Cardiac output measurement differs from expected value patient safety

Calculated cardiac output value displayed on bedside monitor does not match expected clinical value or previous measurements.

Ranked causes

1. Settings are incorrect (common)
2. ScvO2 cannot be measured (affects calculation) (occasional)
3. Cardiac output was measured by dye dilution method (temporal issue) (occasional)

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

CCO measured value not displayed with CCO monitor

Continuous cardiac output data from connected CCO monitor does not appear on bedside monitor display.

Ranked causes

1. CCO monitor not connected to bedside monitor properly (common)
2. Interface or cable connected to wrong socket on CCO monitor (common)
3. Communication settings do not match (common)

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

CCO waveform inaccuracy

Screen message 'Silence CCO Check Waveform' appears; CO measurement unreliable

Ranked causes

1. Poor arterial waveform quality (common)
2. Inappropriate IBP line (occasional)
3. Prolonged waveform inaccuracy (occasional)

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

More symptoms

CO Catheter Not Connected message
CO2 check external device (Microcap/Micropod)
CO2 connector off
CO2 overheat (AG-400RK unit)
CO2 value is low with sidestream AG-400RK unit
Communication loss with network device
Core unit overheating
Dashes displayed on window
Device communication interrupted
External device communication interrupted
FiO2 connection cord disconnected from input unit
Gas calibration cannot be done
IBP Check Sensor message
Incompatible parameter connected
Input unit communication error
Measure lamp on AG-400RK unit does not light
Microcap or Micropod external instrument value not displayed
Mixed anesthetic agents detected simultaneously
Multigas unit front panel lamp does not light
Multigas/flow unit front panel lamp does not light
Multilink configuration error
NIBP Weak Pulse message
NMT sensor connections incomplete
No sync sound output from bedside monitor
Oxygen sensor disconnected or damaged
Respiration impedance signal noise
Respiration thermistor connector off
Respiration waveform amplitude small or becomes baseline (thermistor method)
Sample gas outlet connection error
ScvO2 measurement data differs from expected value
SpO2 check external device
SpO2 detecting pulse
SpO2 weak pulse
Temperature Check Sensor message
The measured value for the transcutaneous monitor is not displayed
Water trap missing or improperly attached
WLAN transport failed to start
AA-910P multi amp unit disconnected
AC power disconnected or failure
AE-120A EEG head set power or start switch held during measurement
AE-120A EEG head set wireless communication interrupted
AE-920P neuro unit multilink cable disconnected
AE-920P neuro unit receiver disconnected
AP sensor error
AP zero calibration error
Arrhythmia alarm occurs frequently with normal heart rate
Backup battery charging
Bedside monitor clock display incorrect
Bedside monitor screen dark or dim
BIS Check External Device message (BIS Monitor)
BIS processor/BISx measured value not displayed
Calculated parameter values differ from bedside monitor display
Cannot turn on bedside monitor power
CCO connector disconnected
CCO zero balance unstable
CCO/PCCO measured value not displayed with APCO/IBP processor
Clock failure
CO Blood Temperature Out Of Range message
CO Connector Off message
CO Injectate Temperature Out Of Range message
CO Irregular Curve message
CO2 calibration error
CO2 check CO2 cell
CO2 check device (AG-400RK unit)
CO2 device failure (AG-400RK unit)
CO2 device failure (Microcap/Micropod)
CO2 waveform does not appear
Communication Error message with central monitor or receiving instrument
EEG connector disconnected
Electrode impedance out of range
Flow/Paw calibration error
Gas warming up in progress
IBP Check Label message
IBP Connector Off message
IBP Out Of Range message
IBP Zero Out of Range message
IBP Zero Unstable message
Input signal amplitude incorrect (standard sensitivity check failed)
Input unit disconnected or improperly connected
Measured value and waveform not displayed on window
Measurement value out of calibration range
Multigas unit front panel lamp lights in orange
Multigas/flow unit front panel lamp lights in orange
Multigas/flow unit measured value and waveform not displayed
Multiple anesthetic machines or multigas units connected
Network printer connection failed
NIBP Air Leak alarm
NIBP Cannot Detect Pulse message
NIBP Connector Off message
NIBP cuff suddenly inflates unexpectedly
NMT communication error with bedside monitor
No flow sensor detected
No invasive blood pressure value appears on window
No SpO2 data displayed with Masimo probe
No SpO2-2 data displayed with Nihon Kohden probe
O2 measured value displays as dashes
O2 measured value is abnormal
Paper not feeding from recorder
PiCCO calibration error
PiCCO catheter unavailable
ProAQT calibration error
Recording is faint
Red LED on CO2 adapter blinking
Respiration thermistor check sensor alarm
ScvO2 cannot be measured
Sine wave noise on pulse wave
Small injectate temperature change
SpO2 check probe site
SpO2 external device check (non-Nihon Kohden)
System does not start normally
Temperature Check Label message
Temperature Connector Off message
Temperature value not displayed on window
The waveform trace is interrupted (AE-120A)
TOF monitoring device disconnected
Water trap, sample line or exhaust tubing clogged or bent
Waveforms recorded but trend and list cannot
A-Fib recall data cannot be displayed on destination monitor
Abnormal noise or smell from EEG head set
Acquiring PWTT Data message
AE-120A EEG head set wireless signal quality poor
Alarm occurring on connected ventilator
Analog external instrument disconnected from bedside monitor
Anesthetic machine disconnected from bedside monitor
AP sensor not connected
AP zero imbalance
Arrhythmia analysis disabled
Auto lead change occurred
Balloon burst during CO measurement
Bedside monitor overheating
BIS Alarm message (BIS Monitor)
BIS Error message (BIS Monitor)
BIS High Impedance message
BIS Impedance Checking message
BIS Module Failure (BIS Processor/BISx)
BIS Noise message
BIS Parameter Duplicated message (BIS Monitor)
BIS Parameter Duplicated message (BIS Processor/BISx)
BIS processor operation check
BIS Sensor Expired message (BIS Processor/BISx)
BIS Simulated Data message
Blood congestion from frequent NIBP measurement
Blood pressure waveform not output from BP OUT socket
BSM-1700 battery pack not installed
Calibration: Gas measuring accuracy for AG-920RK and GF-100 series multigas units
Calibration: Gas measuring accuracy for GF-200 and GF-300 series multigas units (accuracy check only)
Cannot check BIS impedance
Cannot connect cuff to air hose
CCO measurement unstable
CCO monitor alarm active
CCO monitor error
CCO parameter duplicated
CCO patient information missing
CCO zero imbalance
CCO zeroing complete
Cerebral/somatic oximeter disconnected from bedside monitor
CeVOX module disconnected
CeVOX module warming up
CO Computing CO message
CO Detecting Baseline message
CO Inject message
CO Injection Timeout message
CO Out Of Range message
CO Parameter Duplicated message
CO2 adapter failure
CO2 calibration in progress (AG-400RK unit)
CO2 cell off (TG-970P, TG-980P)
CO2 change scrubber (AG-400RK unit)
CO2 external device failure (Microcap/Micropod)
CO2 line block (AG-400RK unit)
CO2 line block (Microcap/Micropod)
CO2 measured value is high
CO2 no filterline (AG-400RK unit)
CO2 no filterline (Microcap/Micropod)
CO2 not calibrated
CO2 parameter duplicated
CO2 parameter duplicated (Microcap/Micropod)
CO2 please wait (AG-400RK unit)
CO2 purging (AG-400RK unit)
CO2 purging (Microcap/Micropod)
CO2 sensor failure
CO2 value is high with sidestream AG-400RK unit
CO2 warming up (AG-400RK unit)
CO2 warming up (Microcap/Micropod)
Connected parameter device failure
Core unit CPU reset
Cuff pressure does not hold or leaks excessively
Cursor moves or window opens without touch
Dashes displayed on flow/paw window
Dots missing from recording
Duplicate analog communication cable labels
Duplicate PiCCO parameter
Duplicate TOF parameter
ECG cannot analyze
ECG low millivolt signal
ECG module failure
EEG baseline reset
EEG calibrating
EEG device communication error
EEG device failure
EEG electrode impedance too high
EEG head set abnormally hot
EEG head set LEDs do not light on power-on
EEG impedance checking
Electrode attached correctly but message displayed; waveform not shown
Electrode detachment not detected
Error condition on connected ventilator
Expiration and inspiration phases reversed (thermistor method)
External CCO device disconnected
Flow/Paw calibration complete
Flow/Paw device failure
Flow/Paw measurement out of range
Flow/Paw zeroing in progress
Gas calibration complete (informational)
Gas calibration in progress (informational)
Gas measurement PCWP measuring (informational)
Gas module overheat (GF-200/GF-300 series)
Gas purging operation in progress
High-cut filter response out of specification
IBP Catheter Disconnect message
IBP displays 0 mmHg when using JP-911P interface
IBP Not Zero message
IBP Parameter Duplicated message
IBP Zeroing Complete message
IBP Zeroing message
Inflation speed outside acceptable range (adult/child mode)
Inflation speed outside acceptable range (neonate mode)
Inflation Time Passed message
Injectate temperature too high
Input unit battery pack problem
Input unit disconnected during transport
Input unit not connected or not ready
Input unit not transmitting data to bedside monitor
Input unit power error
Internal gas module tube clogged
LED on remote control does not blink or light
Menu window does not close
MOTION waveform not responding to head set movement
Multilink power error
Multiple AA-910P multi amp units connected
Multiple FiO2 connection cords connected
Multiple JA-920P interface units connected
Multiple neuro units connected to bedside monitor
Multiple oximeters connected to bedside monitor
Multiple transcutaneous monitors connected
Network cable not properly connected to printer
Neuro unit (AE-918P) EEG accuracy check
NIBP auto measurement does not start despite interval passing
NIBP calibration sensor readings out of tolerance
NIBP Check Interval Setting message
NIBP cuff does not inflate
NIBP cuff inflates rapidly with pressure rising quickly
NIBP Cuff Occlusion message
NIBP cuff suddenly deflates during inflation
NIBP data appears dark or shows dashes on window
NIBP Diastolic Out Of Range message
NIBP High Cuff Pressure alarm
NIBP Inflation Pressure low message
NIBP Measurement Time-Out
NIBP Module Failure
NIBP Out Of Range message
NIBP pressure does not rise
NIBP Remeasuring message
NIBP Safety Circuit Running message displayed
NIBP Systolic Out Of Range message
NIBP Zeroing message
NMT module calibration failed
NMT module malfunction
NMT module not calibrated
NMT temperature sensor not connected
No BIS data displayed on window
No CO data displayed on window
No O2 data on window
No printing from recorder (paper feeding only)
No recording paper loaded
No SpO2 data displayed with Nellcor probe
Not enough free space in USB memory
Nothing appears on remote control display window
Nothing appears on the EEG window
Oxygen sensor calibrating (informational)
Parameter connector disconnected
Patient body temperature too low for TOF measurement
PCWP automatic measurement fails
PCWP measurement not recognized
PiCCO catheter disconnected
PiCCO catheter not connected
PiCCO check external device
PiCCO external device disconnected
PiCCO external device error
PiCCO monitor alarm active
PiCCO monitor error
PiCCO parameter duplicated
Please Wait message
Power lamps blinking on VL-190P LCD and core unit
Power unit failure in core unit
Printed characters garbled; data cannot print
Printer is busy
Printer network settings incorrect
Printer not powered on
Printer out of order
ProAQT sensor expired
ProAQT sensor LED not pulsating or orange LED lights
PWTT Uncal message
Recorder door open
Recorder operates only some of the time
Recorder unit faulty
Recorder unit not connected
Recorder unit not installed or icon disabled
Recording paper not loaded properly
Recording start position inaccurate
Recording starts suddenly without key operation
Respiration impedance measurement off
Respiration rate inaccurate (thermistor method)
Respiration thermistor parameter duplicated
Respiration waveform not displayed (thermistor method)
Safety circuit over-pressure limit not functioning (adult/child mode)
Safety circuit over-pressure limit not functioning (neonate mode)
ScvO2 ambient temperature high
ScvO2 calibration error
ScvO2 light interference
ScvO2 module internal error
ScvO2 module overheat
ScvO2 signal too high
ScvO2 signal too low
Solenoid valve operation (V1 quick exhaust, V2 slow exhaust) out of specification
Sometimes the waveform becomes flat
SpO2 cannot measure
SpO2 external device alarm
SpO2 external device error
SpO2 external device parameter duplicated
SpO2 light interference
SpO2 module failure
SpO2 no probe
SpO2-2 parameter duplicated
SQI bar graph not displayed on home screen
Standby lamp on AG-400RK CO2 unit does not light
SVV highly variable pulse rate
Tb signal unstable
TD measurement limit reached
TD measurement timeout
TD slow injection
TD temperature sensor error
Temperature Parameter Duplicated message
The analog waveform is not displayed
The impedance check was not performed correctly (AE-120A)
The measured value for the cerebral/somatic oximeter is not displayed
The same waveform appears in a different channel (AE-120A)
The tcPO2/tcPCO2 measured value displayed on the bedside monitor is abnormal
The waveform of a channel including optional electrodes is flat (AE-120A)
Thrombosis risk from NIBP measurement
Time constant out of specification
Time zone mismatch between monitors
TOF acceleration signal too high during calibration
TOF acceleration signal too low during calibration
TOF acceleration signal unstable during calibration
TOF device error
TOF measured value not displayed
TOF measurement stimulus applied too soon after previous measurement
TOF supramaximal stimulation current not found
TOF temperature sensor out of measurement range
Touch position misaligned on LCD screen
Touch screen keys not responding to input
Touch screen location misalignment
Transcutaneous monitor disconnected from bedside monitor
Unspecified accuracy (AG-920RK only)
Upper or lower limit alarm occurring
USB keyboard or mouse not functioning
Ventilator connection conflict
Ventilator disconnected from bedside monitor
Visual inspection of BIS processor (QE-910P)
Visual inspection of EEG head set (AE-120A) and accessories
Visual inspection of multigas unit (AG-920RK, GF-100, GF-200, GF-300 series)
Visual inspection of multilink cable and wireless receiver (AE-920P neuro unit)
Visual inspection of neuro unit (AE-918P)
Vital reaction detected during TOF pre-PTC phase
Water in water trap container
Waveform amplitude fails simple method check
Wireless signal loss or interrupted waveforms at 5 m distance
Zeroing complete

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

Error codes

Code	Meaning	Trigger	Severity
`AC POWER ERROR`	AC power disconnected from monitor; AC power supply failure or power outlet failure	AC power cable disconnected or power failure detected	critical
`Acquiring PWTT Data`	System acquiring pulse wave transit time calibration data	PWTT measurement initiation	info
`— AP Zero Cal Error`	AP zero calibration failed	Circuit not open to air or pressure unstable	error
`BIS Alarm`	Alarm condition on external BIS monitor	BIS monitor generates alarm	warning
`BIS Check External Device`	BIS monitor disconnected or communication error	BIS monitor cable disconnect or comm failure	error
`BIS Check Sensor`	BIS sensor, interface cable, or converter disconnected; impedance too high	Sensor/cable disconnect; high impedance	error
`BIS Connector Off`	BIS digital signal converter or parameter cord disconnected	BIS cable or connection cord removed	error
`BIS Error`	Error condition on external BIS monitor	BIS monitor detects error	error
`BIS High Impedance`	High impedance between BIS sensor and skin	Sensor-skin interface impedance elevated	warning
`BIS Impedance Checking`	System checking electrode impedance	Automatic impedance check during initialization	info
`BIS Module Failure`	BIS module hardware is faulty	Module component failure detected	critical
`BIS Noise`	Electromagnetic or physiological noise detected	Noise interference during BIS measurement	warning
`BIS Parameter Duplicated (Monitor)`	Two or more BIS monitors connected	Multiple BIS monitor interfaces detected	error
`BIS Parameter Duplicated (Processor)`	Two or more BIS sensors connected to BIS processor	Multiple BIS sensors detected	error
`BIS Sensor Expired`	BIS sensor past expiration date or use limit	Sensor expires after set date or number of uses	warning
`BIS Sensor Failure`	BIS sensor dirty, wet, or faulty	Sensor condition deterioration detected	error
`BIS Simulated Data`	Demonstration BIS sensor in use; data for demo only	Demo sensor detected	warning
`— (blank screen during startup)`	PC function is starting or in recovery process	Normal system startup or recovery in progress	info
`— (blank screen or error during operation)`	PC function was down and restart is in progress	PC function shutdown detected and restart initiated	warning
`Change/Save PCWP`	Operator instruction to register PCWP data in hemodynamic system	PCWP measurement completed or manual measurement frozen	info
`Charging Battery`	Backup battery is weak from prolonged AC disconnection or undergoing periodic charging cycle	Backup battery voltage low or scheduled charging cycle active	info
`— Check SSD card`	SSD card has exceeded its service life expiration date	SSD card age reaches manufacturer end-of-life date	warning
`Clock Failure`	Real-time clock failure due to low lithium battery or faulty RTC circuit	RTC chip detects battery voltage low or circuit malfunction	warning
`CO Catheter Not Connected`	Thermodilution catheter not connected to CO cord	Catheter disconnect or missing connection	error
`CO Computing CO`	System measuring and calculating cardiac output	Thermodilution curve being processed	info
`CO Connector Off`	CO connection cord removed or disconnected from MULTI socket	CO cord disconnect detected	error
`CO Detecting Baseline`	System searching for baseline temperature curve	CO measurement initiated	info
`CO Inject`	System ready for injectate bolus	CO measurement initialized and awaiting injection	info
`CO Injection Timeout`	Injectate not detected within timeout period	No injectate detected after 4 min or 30 sec	warning
`CO Irregular Curve`	Abnormal thermodilution curve suggesting late return or shunt	Curve analysis shows abnormality	warning
`Communication Loss`	Network communication lost with bedside monitor or networked device; interbed monitor disconnected	Network cable disconnected; network settings incorrect; network communication timeout; hub failure	warning
`CO Out Of Range`	Calculated CO value outside monitor range	CO result exceeds monitor limits	warning
`CO Parameter Duplicated`	Two or more CO connection cords connected	Multiple CO cords detected	error
`CO Tb Out Of Range`	Blood temperature outside 15-45°C range	Temperature measurement outside physiological range	warning
`CO Ti Out Of Range`	Injectate temperature 27°C (81°F) or higher	Injectate too warm for measurement	warning
`CO Unstable Baseline`	Baseline unstable due to physiology or noise	Baseline instability detected	warning
`Deflate Balloon`	Operator instruction to deflate PCWP balloon	PCWP measurement completed	info
`— EEG CAL`	EEG system performing calibration	EEG calibration process initiated	info
`— EEG Calibrating`	EEG calibration in progress	Calibration routine running	info
`— EEG High Impedance`	EEG electrode impedance exceeds acceptable level during impedance check	Electrode impedance measurement exceeds system threshold	info
`— EEG Impedance Checking`	EEG system performing electrode impedance check automatically	Automatic impedance check initiated by system	info
`— EEG Low Battery`	AE-120A EEG head set battery charge is low but not empty	Remaining battery charge approximately one hour or less	info
`— EEG Resetting Baseline`	EEG baseline reset in progress	Baseline reset routine running	info
`— EEG Resetting Baseline`	EEG system resetting baseline for signal	Baseline reset process initiated	info
`— EEG Start Switch Press and Held During Meas`	START switch held down while measurement started on AE-120A head set	START switch pressed and held during measurement initiation	info
`— EEG Start Switch Pressed`	START switch activated during ongoing EEG measurement	START switch pressed while measurement already in progress	info
`— esCCO Ready For Cal`	esCCO system ready for calibration; required parameter data available	All required parameters obtained and ready for calibration	info
`— Flow/Paw Cal Complete`	Flow/Paw calibration successfully completed	Zero calibration completes	info
`— Flow/Paw Out Of Range`	Flow/Paw measurement exceeds valid range	Measurement value outside acceptable limits	info
`— Flow/Paw Zeroing`	Flow/Paw zero calibration in progress	Calibration procedure running	info
`Freeze Waveform`	PCWP automatic measurement failed; manual mode required	Automatic PCWP analysis unable to complete	warning
`— - Gas Cal Complete`	Air or gas calibration completed successfully	Calibration procedure finished without errors	info
`— - Gas Calibrating`	Gas or air calibration procedure in progress	Calibration started and running	info
`— - Gas Purging`	Gas module performing automatic sampling line purge to clear clogging (AG-920RK only)	Sampling line clogging detected during operation (AG-920RK)	info
`— - Gas Warming Up`	Gas module initializing after power-on or configuration change	Power applied to gas module or instrument configuration changed (GF-100)	info
`Inflate Balloon`	PCWP measurement awaiting balloon inflation	PCWP measurement initiated without balloon inflation	info
`Inflation Time Passed`	Cuff inflation time exceeded maximum for patient category	Venous puncture mode inflation exceeded time limit	warning
`Input Unit Disconnect`	Input unit cable or connector not properly inserted; abnormality in input unit detected	Input unit physically disconnected or communication loss to input unit	error
`Input Unit Failure`	Communication error between input unit and core unit; abnormality in memory unit; or data transferred with mismatched time zone settings	Input unit cannot communicate with core unit; memory error detected; or time zone mismatch detected during data transfer	error
`Input Unit Pwr Error`	Abnormality in power voltage supplied to input unit	Power supply to input unit fails or produces abnormal voltage	error
`Interface Unit Duplicated`	Two or more JA-920P interface units connected to system simultaneously	System detects multiple JA-920P interface units	error
`Main Unit Overheat`	Core unit temperature exceeds safe operating threshold	Internal temperature sensor detects overheating condition	error
`Measuring`	PCWP value measurement in progress	Automatic PCWP measurement started	info
`Monitor Off`	Interbed monitor device is turned off or disconnected from network	Interbed device powered down or network disconnected	warning
`Multiamp Unit Disconnect`	AA-910P multi amp unit accidentally or intentionally disconnected from system	Multi-link cable disconnected from AA-910P unit	warning
`MULTI AMP UNIT DUPLICATED`	Two or more AA-910P multi amp units connected to system simultaneously	System detects multiple AA-910P units on multilink	error
`Multilink Config Error`	Abnormality in QF series interface or IF series communication cable; multi-link cable damaged or short-circuited; faulty circuit operation	Cable communication fails or short circuit detected on multi-link cable; circuit board detects malfunction	error
`Multilink Power Error`	Power supply to multilink system is faulty or bedside monitor has internal power fault	Power monitoring detects fault in multilink power supply	error
`NIBP Cannot Detect Pulse`	System unable to detect patient's pulse during measurement	Pulse wave amplitude too small or cuff incorrectly positioned	warning
`NIBP Check Interval Setting`	NIBP measuring at 1-minute intervals for extended duration	Continuous NIBP measurement at 1-minute intervals for more than 30 minutes	info
`NIBP Connector Off`	Air hose disconnected from NIBP socket	Air hose removed or loose connection	error
`NIBP Cuff Occlusion`	Air flow blocked in cuff tubing	Air hose kinked or compressed	error
`NIBP Dia Out Of Range`	Diastolic pressure exceeds monitor upper limit	Patient diastolic blood pressure above monitor range	warning
`NIBP High Cuff Press`	Excessive cuff pressure applied	Cuff pressure exceeds safety limit during measurement	warning
`NIBP Inflation Press low`	Cuff inflation pressure insufficient	Patient systolic pressure higher than expected or automatic inflation limit reached	warning
`NIBP Meas Time-Out`	NIBP measurement exceeded time limit	Measurement time exceeded due to artifact or physiological factors	warning
`NIBP Module Failure`	NIBP measurement module is faulty	Module hardware failure detected	critical
`NIBP Out Of Range`	Both systolic and diastolic pressures exceed monitor range	Patient blood pressure above measurement range	warning
`NIBP Remeasuring`	NIBP measurement restarted due to artifact or error	Arrhythmia; body movement; shaking; air hose squeezing detected during measurement	warning
`NIBP Safety Circuit Running`	NIBP measurement stopped by safety circuit	Air hose bent or squeezed during measurement	warning
`NIBP Sys Out Of Range`	Systolic pressure exceeds monitor upper limit	Patient systolic blood pressure above monitor range (typically >260 mmHg)	warning
`NIBP Weak Pulse`	Patient's pulse wave too small for NIBP detection	Inadequate pulse amplitude or poor cuff application	warning
`NIBP Zeroing`	Zero balance adjustment in progress	System initializing NIBP channel	info
`Not Enough Free Space in USB Memory`	Insufficient free space on USB flash drive to save captured screen data	USB drive free space falls below required threshold during screen capture	warning
`— - O2 Calibrating`	Oxygen sensor calibration in progress	Calibration procedure started	info
`— - O2 Uncal`	Oxygen sensor not calibrated or past end of service life	Sensor reaches end of life or lacks valid calibration	warning
`Parameter Duplicated`	Same parameter type connected multiple times to system	System detects duplicate parameter or sensor connections	warning
`Parameter Not Available`	Incompatible parameter connected; mixed Nihon Kohden and third-party SpO2 probes; or incompatible sensor on restricted MULTI socket	Incompatible parameter detected; multiple SpO2 measurement methods active; sensor connected to restricted socket	warning
`— PiCCO Cal Error`	PiCCO calibration failed	Invalid TD measurements or calibration data	error
`Please Wait`	Measurement restarted too soon after pause	New measurement started within 2 seconds of previous measurement stop	info
`— Power Switch Press and Held During Meas`	POWER switch held down while measurement started on AE-120A head set	POWER switch pressed and held during measurement initiation	info
`Power Unit Failure`	Abnormality in power unit of CU-191R or CU-192R core unit detected	Internal power supply monitoring detects fault condition in power unit	critical
`— ProAQT Cal Error`	ProAQT calibration failed	Missing CO value or AP measurement	error
`PWTT Uncal`	NIBP calibration not completed for PWTT	PWTT measurement attempted without prior NIBP calibration	warning
`Recovery Anes Alarm`	Alarm condition detected on connected anesthetic machine	Alarm occurrence on anesthetic machine device	warning
`Recovery Anes Error`	Error condition detected on connected anesthetic machine	Error on anesthetic machine device	warning
`Recovery Battery Calibration Error`	Battery capacity calibration failed or is out of accuracy	Battery calibration process failure or checksum error	warning
`Recovery Battery Charge FET Error`	Battery charge control FET (Field Effect Transistor) failure	FET control circuit malfunction in battery pack	error
`Recovery Battery Charging Abnormal`	Battery charging process abnormal or blocked	Charging circuit malfunction or battery not accepting charge	error
`Recovery Battery Charging Cell Imbalance`	Battery cells have unequal charge levels causing imbalance	Cell voltage imbalance detected during charging	warning
`Recovery Battery Discharge Abnormal`	Battery discharge process abnormal or blocked	Battery discharge circuit malfunction detected	error
`Recovery Battery Discharge Cell Imbalance`	Battery cells have unequal discharge levels causing imbalance	Cell voltage imbalance detected during discharge	warning
`Recovery Battery EEPROM Access Error`	Battery pack EEPROM memory read/write error	Memory access failure during battery status check	error
`Recovery Battery Fuse Cut`	SB-920P battery pack internal fuse has opened	Battery pack circuit protection fuse activated	error
`Recovery Battery Impedance Abnormal`	SB-920P battery pack internal impedance out of specification	Battery impedance measurement exceeds threshold	warning
`Recovery Battery Remaining Capacity Abnormal`	Battery remaining capacity calculation abnormal	Capacity estimation failure or fuel gauge error	warning
`Recovery Battery Replacement Life`	SB-920P battery pack has reached end of service life	Battery age or cycle count reaches replacement threshold	warning
`Recovery Battery RSOC Unstable`	Remaining State Of Charge calculation unstable or inaccurate	Battery charging capacity not accurately detected	warning
`Recovery Battery Temperature Abnormal`	SB-920P battery pack temperature is abnormally high	Battery pack operating temperature exceeds safe limit	warning
`Recovery Battery Thermistor Error`	Battery temperature sensor malfunction	Thermistor circuit failure or sensor reading out of range	error
`Recovery Battery Trickle Charge Abnormal`	Trickle charge maintenance function abnormal	Trickle charge circuit malfunction detected	warning
`Recovery Battery Voltage High`	SB-920P battery pack voltage exceeds safe operating level	Battery charging circuit abnormality detected	error
`Recovery Battery Voltage Low`	SB-920P battery pack voltage below safe operating level	Battery pack voltage drops below minimum threshold	warning
`Recovery CCO Alarm`	Alarm active on external CCO monitor	Alarm condition on CCO monitor	error
`Recovery CCO Error`	Error detected on external CCO monitor	Error condition on CCO monitor	error
`Recovery Check Input Unit Battery (BSM-1700 series)`	Battery pack status abnormal in BSM-1700 series input unit	Battery pack missing or defective in BSM-1700 unit detected on startup	warning
`Recovery ECG Module Failure`	ECG measurement module hardware malfunction	ECG module circuit failure or internal communication error	error
`Recovery esCCO Error`	esCCO measurement value out of range or PWTT invalid	Measurement outside acceptable range or invalid pulse transit time	warning
`Recovery - Gas Line Block`	Gas measurement recovered after line blockage detected	Blockage detected and possibly cleared during operation	warning
`Recovery Input Unit Failure`	Communication error or abnormality between input unit and core unit	Communication failure or memory abnormality in input unit detected	error
`Recovery or Silence A-Fib`	Atrial fibrillation detected	Irregular atrial activity without P waves detected for sustained period	warning
`Recovery PC Board Error`	Abnormality in CU-191R or CU-192R core unit PC board	PC board voltage or internal communication error detected	error
`Recovery PCCO Alarm`	Alarm active on external PiCCO monitor	Alarm condition on PiCCO monitor	error
`Recovery PCCO Error`	Error detected on external PiCCO monitor	Error condition on PiCCO monitor	error
`Recovery Speaker Failure`	Speaker in CU-191R or CU-192R core unit is faulty	Speaker circuit failure or audio output error detected	warning
`Recovery StO2 Error`	Error condition detected on connected cerebral oximeter	Error on cerebral oximeter device	warning
`Recovery System Board Failure XXX (Board name)`	System board abnormality in specified board with voltage or communication error	Board voltage out of specification or internal communication bus error	error
`Recovery System Failure PC`	PC function abnormality preventing normal operation	PC subsystem failure or internal communication error detected	error
`Recovery System Start Error XXX (Board name)`	Abnormality in specified system board or internal memory during startup	Board failure or memory error detected during system initialization	error
`Recovery tcPO2/tcPCO2 Alarm`	Alarm condition detected on connected transcutaneous monitor	Alarm occurrence on transcutaneous monitor device	warning
`Recovery TOF Error`	Error on the TOF monitoring device	TOF device detects internal error	error
`Recovery Unit Not Available`	Incompatible unit is connected to the system	Incompatible module or interface device detected during connection	error
`Recovery - Vent Alarm`	Active alarm on connected ventilator detected by monitor	Ventilator alarm condition transmitted to bedside monitor	warning
`Recovery - Vent Error`	Error condition detected on connected ventilator	Ventilator error state transmitted to bedside monitor	warning
`— ScvO2 Cal Error`	ScvO2 calibration error	ScvO2 calibration procedure failed	error
`Silence Analog Parameter Duplicated`	Duplicate communication cable labels on analog external instruments	Two communication cables with same label connected simultaneously	warning
`Silence Anes Parameter Duplicated`	Multiple anesthetic machines or multigas units connected to bedside monitor	Two or more anesthetic machines or multigas units connected simultaneously	warning
`Silence AP Sensor Error`	ProAQT sensor connection error	ProAQT sensor not connected or cable faulty	warning
`Silence AP Zero Imbalance`	AP zero adjustment failed	AP zero adjustment process failed	warning
`Silence Asystole`	Absence of cardiac electrical activity detected	No QRS complexes detected for sustained period	critical
`Silence Bigeminy`	Bigeminy pattern detected (every other beat premature)	Alternating pattern of normal and premature beats	warning
`Silence Bradycardia`	General bradycardia (heart rate <60 bpm) detected	Sustained heart rate below bradycardia threshold	warning
`Silence CCO Check Patient Information`	Patient demographics not entered	Patient gender, age, or BSA missing from monitor	warning
`Silence CCO Check Waveform`	Arterial waveform not accurate for CO measurement	Poor waveform quality detected during CO measurement	warning
`Silence CCO Parameter Duplicated`	Multiple CCO devices connected to core unit	CCO monitor and APCO/IBP processor both connected to core unit	warning
`Silence CCO Unstable`	CCO measurement unstable or unreliable	Unstable CO output detected during measurement	warning
`Silence CCO Zero Imbalance`	Zero balance not adjusted or invalid	Zero balance adjustment not performed or incomplete	warning
`Silence CCO Zeroing Complete`	Zero balance adjustment successfully completed	Zero balance adjustment process completes	info
`Silence CCO Zero Unstable`	Zero balance adjustment unstable or unsuccessful	Zero balance adjustment failure detected	warning
`Silence Couplet`	Couplet (two consecutive premature beats) detected	Two consecutive premature beats detected	warning
`Silence Display Duplicated`	Multiple displays connected in invalid configuration	Display detected on both docking socket and Display 1 socket simultaneously	error
`Silence Early VPC`	Early ventricular premature complex detected	Premature ventricular contraction on T wave (R-on-T)	warning
`Silence EEG Battery Empty`	Batteries in AE-120A EEG head set completely discharged	Battery level in head set reached zero	warning
`Silence EEG Check Electrodes`	EEG electrode impedance issue or disconnection detected	Electrode not in contact, disconnected, or impedance too high	warning
`Silence EEG Check Electrodes1`	EEG electrode attachment or impedance problem	Poor electrode contact or impedance too high	warning
`Silence EEG Device Failure`	AE-918P neuro unit or multi-link unit faulty	Neuro unit or multi-link unit hardware failure	warning
`Silence EEG No Communication`	Wireless communication lost between AE-120A EEG head set and AE-920P neuro unit	Wireless signal interruption between head set and receiver	warning
`Silence EEG Parameter Duplicated`	Multiple EEG neuro units with same parameter connected to bedside monitor	Two or more cables with same parameter or module connected to bedside monitor simultaneously	warning
`Silence EEG Place the Head Facing Up`	Patient's head is positioned to the side during EEG measurement	Patient head turned to side during active measurement	warning
`Silence EEG Unstable Communication`	Poor quality wireless signal between AE-120A EEG head set and AE-920P neuro unit	Weak wireless signal quality between head set and receiver	warning
`Silence esCCO Cal Complete`	esCCO calibration completed successfully	Calibration process finished without errors	info
`Silence esCCO Cal Error`	esCCO calibration failed due to invalid CO value or parameter changes	Calibration CO value out of range or patient parameters changed during calibration	warning
`Silence esCCO Check Cal Parameter`	esCCO calibration parameter error or missing data	Required calibration parameters unavailable or invalid	warning
`Silence Extreme Brady`	Extreme bradycardia (very slow heart rate) detected	Heart rate falls below extreme bradycardia threshold (typically <30-40 bpm)	critical
`Silence Extreme Tachy`	Extreme tachycardia (very rapid heart rate) detected	Heart rate exceeds extreme tachycardia threshold (typically >180-200 bpm)	critical
`Silence Flow/Paw Cal Error`	Flow/Paw calibration failed	Vibration or electromagnetic noise during calibration	warning
`Silence Flow/Paw Device Failure`	Flow/Paw unit hardware failure	Flow/Paw unit malfunction detected	warning
`Silence Freq VPC`	Frequent ventricular premature complexes detected	VPC frequency exceeds threshold (typically >5 per minute)	warning
`Silence - Gas Cal Error`	Gas or air calibration procedure failed	Automatic calibration unable to complete successfully	warning
`Silence - Gas Check GAS Device`	Gas module communication or configuration error; multiple possible causes	Module communication loss; measurement switch off; menu setting off; cable disconnect; communication error; power disconnect	error
`Silence - Gas Check Sample Line`	Gas module detects improper sample line connection or excessive pressure (AG-920RK only)	Sample outlet connection or pressure fault detected during measurement (AG-920RK)	warning
`Silence - Gas Check Watertrap or Sample Line`	Gas module detects water or blockage in sampling path	System detects water in trap or clogging during operation	warning
`Silence - Gas Out Of Range`	Gas measurement value or calibration outside acceptable range	Measurement exceeds defined range or calibration invalid	warning
`Silence - Gas Overheat`	Gas module overheating detected; fan malfunction (GF-200/GF-300 series only)	Internal temperature threshold exceeded	warning
`Silence - Gas Unspecified Accuracy`	Gas measurement outside guaranteed accuracy range (AG-920RK only)	Measurement value exceeds specified accuracy bounds (AG-920RK)	warning
`Silence HiQ-View Setting Inconsistent`	Settings on bedside monitor and telemetry device are mismatched	Settings discrepancy detected between monitor and telemetry device	warning
`Silence Irregular RR`	Irregular RR interval pattern detected	Beat-to-beat intervals vary beyond normal variation	warning
`Silence - Mixed GAS`	Multiple anesthetic agents detected simultaneously in gas stream	System detects two different anesthetic agents present at same time	warning
`Silence MPU Module Failure`	Main processor unit module malfunction	Circuit operation abnormality in MPU	critical
`Silence Multiform`	Multiform premature complexes detected	Premature beats of different morphologies detected	warning
`Silence NIBP Air Leak`	Air leak detected in NIBP system	Cuff or air hose not connected or damaged	error
`Silence No Pacer Pulse`	Pacemaker pulse not detected when expected	Pacing spike not detected during demand pacing	warning
`Silence - O2 Parameter Duplicated`	Multiple FiO2 connection cords connected simultaneously	System detects more than one FiO2 cord in MULTI socket(s)	warning
`Silence Pacer Non-Capt`	Pacemaker pulse not capturing ventricle (loss of capture)	Pacing spike present without corresponding QRS complex	warning
`Silence Pause`	Pause in cardiac rhythm detected	Beat-to-beat interval exceeds pause threshold duration	warning
`Silence PCCO Catheter Disconnect`	PiCCO catheter was removed	PiCCO catheter disconnected from cord	warning
`Silence PCCO Catheter Unavailable`	PiCCO catheter faulty or incompatible	Catheter malfunction or incompatibility detected	warning
`Silence PCCO Check Ext Device`	AP-170P hemodynamic unit internal error	Internal error detected on AP-170P unit	warning
`Silence PCCO Ext Device Error`	AP-170P hemodynamic unit system initialization failed	System initialization error on AP-170P unit	warning
`Silence PCCO No Catheter`	PiCCO catheter not connected	PiCCO catheter not connected to JT-170P cord	warning
`Silence PCCO Parameter Duplicated`	Multiple CCO devices connected	Two or more CCO devices detected	warning
`Silence PCCO ProAQT Sensor Error`	ProAQT sensor expired	Expired ProAQT sensor in use	warning
`Silence Prolonged RR`	Prolonged interval between consecutive beats detected	Beat-to-beat interval exceeds normal range	warning
`Silence rSO2 Parameter Duplicated`	Multiple cerebral/somatic oximeters connected to bedside monitor	Two or more oximeters connected simultaneously	warning
`Silence ScvO2 Ambient Temp High`	Ambient temperature too high for CeVOX operation	Ambient temperature exceeds operational limits	warning
`Silence ScvO2 Light Interference`	Excessive ambient light detected	Ambient light exceeds safe level for measurement	warning
`Silence ScvO2 Module Error`	CeVOX module internal error	CeVOX module hardware/software failure	warning
`Silence ScvO2 Overheat`	CeVOX module overheated	Module internal temperature too high	warning
`Silence ScvO2 Signal Too High`	ScvO2 probe signal too strong	Excessive ScvO2 signal detected	warning
`Silence ScvO2 Signal Too Low`	ScvO2 probe signal too weak	Weak or missing ScvO2 signal	warning
`Silence ScvO2 Warming Up`	CeVOX module warming up after power-on	CeVOX module initializing	info
`Silence StO2 Parameter Duplicated`	Multiple cerebral oximeters connected to bedside monitor	Two or more cerebral oximeters connected simultaneously	warning
`Silence SV Tachy`	Supraventricular tachycardia detected	Rapid supraventricular rhythm >100-150 bpm	warning
`Silence SVV:Highly Variable Pulse Rate`	SVV measurement affected by high pulse fluctuations	Excessive pulse rate variation detected	warning
`Silence System Failure Settings`	Abnormality detected in system settings configuration	System settings checksum or validation error during startup	error
`Silence Tachycardia`	General tachycardia (heart rate >100 bpm) detected	Sustained heart rate above tachycardia threshold	warning
`Silence tcPO2/tcPCO2 Parameter Duplicated`	Multiple transcutaneous monitors connected to bedside monitor	Two or more transcutaneous monitors connected simultaneously	warning
`Silence Telemetry not Connected`	Connection between telemetry device and bedside monitor is interrupted	Signal loss or communication dropout during HiQ-View operation	warning
`Silence - TOF Communication Error`	Communication error between NMT module and bedside monitor	Communication link between NMT and monitor fails or becomes unstable	warning
`Silence - TOF Low Temperature`	Patient body temperature below 32°C (89.6°F); TOF measurement unreliable	Temperature sensor reading drops below 32°C (89.6°F)	warning
`Silence - TOF Module Failure`	NMT module internal hardware error detected	NMT module internal fault condition	critical
`Silence TOF Parameter Duplicated`	Two or more TOF monitoring devices are connected	Multiple TOF devices detected on single interface	warning
`Silence Trigeminy`	Trigeminy pattern detected (every third beat premature)	Pattern of two normal beats followed by premature beat repeating	warning
`Silence V Brady`	Ventricular bradycardia detected	Slow ventricular rhythm with wide QRS complexes at slow rate	warning
`Silence - Vent Parameter Duplicated`	Ventilator communication connection already established; duplicate connection attempt	Multiple ventilator connections or cable already connected when another connection initiated	warning
`Silence VF`	Ventricular fibrillation detected	Chaotic rapid ventricular electrical activity without organized complexes	critical
`Silence VPC`	Ventricular premature complex detected	Single or occasional ventricular premature beats detected	warning
`Silence VPC Run`	Run of ventricular premature complexes detected	Multiple consecutive premature ventricular contractions without intervening sinus beat	warning
`Silence V Rhythm`	Abnormal ventricular rhythm detected	Sustained ventricular rhythm pattern detected	warning
`Silence VT`	Ventricular tachycardia detected	Rapid sustained ventricular rhythm >100 bpm without P waves	critical
`Silence XXX (Parameter name) External Device Failure`	External monitoring device connected to parameter is faulty	External device hardware malfunction detected	error
`Silence XXX (Parameter name) Module Failure`	Parameter measurement module hardware is faulty	Module malfunction detected during measurement	error
`Silence Zeroing Complete`	Zero adjustment successfully completed	Zero adjustment process completes	info
`— Tb Signal Unstable`	Blood temperature signal unstable	Unstable Tb signal detected	info
`— Tb Small Temp Change`	Injectate temperature change too small	Temperature change less than 0.1°C between injectate and blood	info
`— TD Measurement Limit`	Maximum TD measurements reached	TD measurement storage full	info
`— TD Slow Injection`	Injection speed too slow	Slow injection detected during TD measurement	info
`— TD Temp Sensor Error`	Injectate temperature sensor error	Temperature sensor malfunction	error
`— TD Time Out`	No injection detected within timeout period	Injection not detected in expected time window	info
`— Telemetry Alarm Inactivated`	Alarms are silenced or suspended on vital sign telemeter during HiQ-View use	GZ-120P, GZ-130P, or GZ-140P telemeter has alarms silenced or suspended	info
`Termination Analog Check External Device`	Analog external instrument disconnected from bedside monitor	Communication cable disconnection between analog instrument and bedside monitor	error
`Termination Analog Ext X Check Sensor`	Analog external instrument sensor or connection issue	Sensor disconnection or error on analog external instrument	error
`Termination Anes Check External Device`	Anesthetic machine disconnected from bedside monitor	Communication cable disconnection between anesthetic machine and bedside monitor	error
`Termination AP Check Sensor`	AP sensor or catheter disconnected	ProAQT sensor or PiCCO sensor cable disconnection	error
`Termination Cannot Print`	Network printer unable to accept print job	Printer busy, offline, network issue, or configuration error	error
`Termination CCO Check External Device`	CCO monitor disconnected or communication error	CCO monitor not detected or communication failure	error
`Termination CCO Check Sensor`	CCO sensor connection error or fault	CCO sensor disconnection, cable fault, or wrong sensor type	error
`Termination CCO Connector Off`	APCO/IBP processor not properly connected to MULTI socket	Processor cord removed or disconnected from input unit MULTI socket	error
`Termination Data Send Error`	Network data transmission from bedside monitor to central monitor failed	Network communication error during data transmission	error
`Termination EEG Check Device`	EEG communication error or multi-link cable disconnected	Communication failure or cable disconnection	error
`Termination EEG Check External Device`	EEG multilink cable communication error between AE-920P neuro unit and bedside monitor	Multilink cable disconnected or communication error occurred	error
`Termination EEG Check Scalp`	EEG electrode has been in prolonged contact with patient skin; skin condition check required	Prolonged EEG measurement over long period	warning
`Termination EEG Connector Off`	EEG connection cord removed or disconnected	EEG cord not connected to socket	error
`Termination EEG Connector Off`	AE-920P neuro unit receiver disconnection or communication error	Receiver disconnected from AE-920P neuro unit or communication error occurred	error
`Termination EEG Head Set Failure`	AE-120A EEG head set internal hardware failure detected	Abnormal current or voltage levels detected in head set electronics	error
`Termination End A-Fib`	Atrial fibrillation has ended and delay duration exceeded	A-Fib pattern ceases and configured delay time period elapses	info
`Termination Flow/Paw Check Device`	Flow/Paw measurement switch off or connection error	Measurement switch off, cable disconnected, or communication error	error
`Termination - Gas Device Failure`	Gas module has encountered an internal hardware fault	Internal gas module error detected	critical
`Termination - Gas No Watertrap or Sample Line`	Gas module unable to detect water trap or sample line	System detects missing or improperly connected water trap/sample line at startup or during operation	error
`Termination HiQ-View Connection Failure`	HiQ-View could not restart after bedside monitor restart	HiQ-View restart failed after monitor reboot	error
`Termination Input Unit Disconnect`	Input unit was disconnected without proper removal preparation	Input unit physically removed while removal preparation not completed	error
`Termination No Flow Sensor`	Flow tube disconnected or faulty	Flow tube not detected or malfunction	error
`Termination - O2 Check Sensor`	Oxygen sensor disconnected or damaged	FiO2 sensor connection lost or hardware failure detected	error
`Termination - O2 Connector Off`	FiO2 connection cord not connected to MULTI socket of input unit	FiO2 cord removed, disconnected, or loose in MULTI socket	error
`Termination PCCO Check External Device`	PiCCO monitor disconnected or communication error	PiCCO monitor not detected or communication failure	error
`Termination rSO2 Check External Device`	Cerebral/somatic oximeter disconnected from bedside monitor	Communication cable disconnection between oximeter and bedside monitor	error
`Termination ScvO2 Check Module`	CeVOX module disconnected	CeVOX module not connected to AP-170P unit	error
`Termination StO2 Check External Device`	Cerebral oximeter disconnected from bedside monitor	Communication cable disconnection between cerebral oximeter and bedside monitor	error
`Termination tcPO2/tcPCO2 Check External Device`	Transcutaneous monitor disconnected from bedside monitor	Communication cable disconnection between transcutaneous monitor and bedside monitor	error
`Termination - TOF Cal Error1`	NMT module calibration procedure failed	Automatic NMT calibration unable to complete successfully	error
`Termination TOF Check External Device`	TOF monitoring device is disconnected or communication error	TOF interface disconnection or communication error detected	error
`Termination - TOF Check Sensor`	NMT sensor connections incomplete or loose	NMT module unable to detect proper sensor connections at startup or during operation	error
`Termination - TOF Check Temp Sensor`	NMT temperature sensor not connected to module	Temperature sensor connection lost or not established	error
`Termination - TOF Not Calibrated`	NMT module requires initial calibration before use	NMT module connected without prior calibration or reset	error
`Termination - TOF Pre PTC Response Detected`	Vital patient response detected during TOF pre-PTC calibration phase	Patient muscle response detected during pre-PTC stimulus	warning
`Termination - TOF Signal Too High1`	Acceleration signal during TOF calibration exceeds upper limit	Measured acceleration signal during calibration exceeds maximum threshold	error
`Termination - TOF Signal Too Low1`	Acceleration signal during TOF calibration below lower limit	Measured acceleration signal during calibration falls below minimum threshold	error
`Termination - TOF Signal Unstable1`	Acceleration signal during TOF calibration fluctuating or unstable	Acceleration signal during calibration shows instability or excessive noise	error
`Termination - TOF Supramaximal Not Found1`	TOF supramaximal stimulation current could not be determined during calibration	NMT module unable to identify supramaximal stimulation level	error
`Termination - TOF Temp Out Of Range`	Temperature sensor reading outside valid measurement range 20.0–42.5°C (68.0–108.5°F)	Temperature reading exceeds or falls below sensor measurement limits	warning
`Termination - Vent Check External Device`	Ventilator communication interface lost or disconnected	Ventilator interface or cable disconnected from bedside monitor	error
`— Ti Injectate Temp High`	Injectate temperature warmer than blood	Injectate temperature exceeds blood temperature	info
`— - TOF Please Wait`	Insufficient interval since previous TOF stimulus operation	TET or PTC stimulus applied within 2 minutes of prior measurement	info
`XXX Check Device`	Communication interrupted with connected parameter device; communication error occurred; connection between unit and monitor disconnected	Parameter device communication timeout; cable connection lost; communication protocol error	warning
`XXX Check External Device`	Communication interrupted with external instrument; communication error; connection between external device and monitor disconnected	External device communication timeout; cable disconnected; communication protocol error	warning
`XXX Device Failure`	Connected parameter unit or external device is faulty or not functioning	Parameter device fails self-test or communication lost after connection confirmed	error
`XXX(Press) Catheter Disconnect`	Arterial catheter disconnected from IBP line	IBP pulse absent and mean pressure ≤10 mmHg	critical
`XXX(Press) Check Label`	Duplicate or unrecognized IBP channel label	Two or more IBP cords with same label or unrecognized label	critical
`XXX(Press) Check Sensor`	IBP transducer disconnected or faulty; IBP cord damaged	Transducer disconnect; cord damage; sensor failure	error
`XXX(Press) Connector Off`	IBP connection cord removed from MULTI socket	Cord disconnected from monitor input	error
`XXX(Press) Not Zero`	IBP zero balance not adjusted	Measurement attempted without zero balance calibration	warning
`XXX(Press) Out Of Range`	IBP pressure measurement outside monitor range	Pressure reading exceeds monitor limits	warning
`XXX(Press) Parameter Duplicated`	More than eight IBP cords connected	Attempt to connect >8 IBP channels	error
`XXX(Press) Zeroing`	Zero balance adjustment in progress	Automatic zero balance procedure active	info
`XXX(Press) Zeroing Complete`	Zero balance adjustment successfully completed	Zero balance procedure finished	info
`XXX(Press) Zero Out of Range`	Zero balance value out of acceptable range	Zero point outside normal limits	error
`XXX(Press) Zero Unstable`	Zero balance adjustment unstable or circuit not exposed to air	Zero balance procedure encountered instability	warning
`XXX(Temp) Check Label`	Duplicate or unrecognized temperature probe label	Two or more probes with same label or unrecognized label	error
`XXX(Temp) Check Sensor`	Temperature probe disconnected or cord damaged	Probe disconnect; cord damage detected	error
`XXX(Temp) Connector Off`	Temperature cord disconnected from MULTI socket	Temperature cord removed from monitor	error
`XXX(Temp) Parameter Duplicated`	More than eight temperature cords connected	Attempt to connect >8 temperature channels	error
`— XXX (Unit name) Power Failure`	Power output abnormality in specified unit	Power supply output voltage out of specification	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.