Fetal monitors · Avalon family

Philips Avalon FM20/FM30: troubleshooting and error codes

The ServiceForge knowledge base holds 92 documented symptoms for the Philips Avalon FM20/FM30, with 175 ranked causes, 138 diagnostic checks with test points and expected values, and 21 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

INOP Check Paper

INOP Check Paper message issued; drawer open with paper on sensor or paper jam or sensor issue

Ranked causes

1. Drawer open with paper on sensor (common)
2. Paper jam occurred (occasional)
3. Paper sensor is dirty (occasional)
4. Paper sensor defective (rare)
5. Rubber roller dirty (occasional)
6. Paper not approved by Philips (rare)
7. Inadequate paper mark contrast (rare)
8. Paper changed while recorder in operation (rare)

First check

Verify drawer closure and paper position

Test point: Paper drawer and paper sensor
Expected: Drawer fully closed and latched; paper not contacting sensor

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

External device not receiving data; MIB/RS232

External device not receiving data via MIB/RS232 interface

Ranked causes

1. MIB/RS232 port not configured for data export (common)
2. Wrong data export protocol driver configured (common)
3. Cable not connected correctly or defective (common)
4. External device does not support data export protocol version (occasional)
5. Terminal concentrator does not support dynamic speed negotiation (occasional)
6. MIB/RS232 board in wrong slot (occasional)
7. MIB/RS232 board or connector board defective (rare)

First check

Verify MIB/RS232 port configuration

Test point: Configuration Mode MIB/RS232 settings
Expected: Port configured with correct protocol for data export

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

External device not receiving data; LAN/RS232

External device such as surveillance system (OB TraceVue/IntelliSpace Perinatal) not receiving data from monitor

Ranked causes

1. LAN/RS232 port not configured for data export (common)
2. Cable not connected correctly or defective (common)
3. External device does not support data export protocol version (occasional)
4. Terminal concentrator does not support dynamic speed negotiation (occasional)
5. LAN/RS232 board in wrong slot (occasional)
6. LAN/RS232 board defective (rare)

First check

Verify LAN/RS232 port configuration

Test point: Configuration Mode LAN/RS232 settings
Expected: Port configured with correct protocol and parameters for target device

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

Touchscreen not functioning

Touch input on display does not respond to user input

Ranked causes

1. Touchscreen functionality has been temporarily disabled (common)
2. Touch screen cable not connected (occasional)
3. Touch not calibrated (occasional)
4. Touch controller defective (rare)
5. Touch sensor defective (rare)
6. Main CPU Board defective (rare)

First check

Check if touchscreen is disabled via padlock symbol

Test point: Main Setup key display
Expected: No padlock symbol or padlock disabled

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

Display is blank or brightness is reduced

LCD display does not show image or has reduced brightness during operation

Ranked causes

1. Display Adapter Board cable not connected (common)
2. Backlight tubes defective (occasional)
3. Back-light inverter defective (occasional)
4. LCD flat panel defective (occasional)
5. Main CPU Board defective (rare)

First check

Verify Display cable connection

Test point: Display assembly to Recorder Adapter Board connector
Expected: Cable firmly connected

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

No paper transport

Paper does not move through recorder mechanism during operation

Ranked causes

1. Poor internal connector connection (common)
2. Motor cable disconnected (common)
3. Motor defective (occasional)
4. Paper jam occurred (occasional)
5. Paper drawer is open (common)

First check

Check all internal connectors

Test point: Internal connector pins and seats
Expected: All connectors fully seated and no visible corrosion

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

Transducer Finder LED does not light and transducer not working

After plugging in transducer, Finder LED does not light up briefly twice as expected, and transducer appears not to function. May display 'INOP Bus Master Malfunc' message.

Ranked causes

1. Defective transducer cable (occasional)
2. Defective connector block (occasional)
3. Transducer or connector block is defective (occasional)
4. Bus Master Board is defective (occasional)
5. No power to Bus Master Board (rare)

First check

Visually inspect transducer cable

Test point: Transducer cable and connector
Expected: No visible damage, cracks, or corrosion on cable or connectors

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

Unit does not power on

Green LED does not light up and no test tone is heard after power switch is turned on

Ranked causes

1. No AC mains connection (common)
2. Power supply defective (occasional)
3. Power On/Off switch defective (occasional)
4. Aborted/interrupted or inconsistent software configuration (occasional)
5. Main CPU Board defective (rare)

First check

Verify AC power cord connection

Test point: AC mains socket and monitor power inlet
Expected: Power cord firmly seated and not damaged

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

INOP FetRec Equip Malfunct; no recorder key available

INOP FetRec Equip Malfunct message appears and recorder key not available on display screen

Ranked causes

1. Recorder not calibrated (common)
2. EEPROM on Recorder Adapter Board defective (rare)
3. Recorder Controller on Main CPU Board defective (rare)
4. Recorder cable disconnected (common)

First check

Verify recorder cable connection

Test point: Recorder cable connectors at both ends
Expected: Cable fully inserted and latched at both connections

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

Keyboard or Mouse not functioning

Keyboard/Mouse attached directly to monitor are not responsive or do not work

Ranked causes

1. Keyboard/Mouse not connected properly (common)
2. Keyboard/Mouse are defective (occasional)
3. USB/PS/2 I/O board not properly plugged in (occasional)
4. USB/PS/2 I/O board is defective (rare)

First check

Verify keyboard and mouse connections

Test point: Monitor USB/PS/2 ports
Expected: All cables firmly connected to appropriate ports

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

Keyboard/Mouse not functioning

Attached USB/PS2 keyboard or mouse does not respond to input

Ranked causes

1. Keyboard/Mouse not connected properly (common)
2. Keyboard/Mouse defective (occasional)
3. USB/PS2 I/O board not properly plugged in (occasional)
4. USB/PS2 I/O board defective (rare)

First check

Verify keyboard/mouse cable connections

Test point: Connector ports on monitor rear panel
Expected: Cables fully inserted and seated

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

Paper empty warning issued but paper loaded

Paper empty warning appears in status line at bottom of screen but paper is not actually out

Ranked causes

1. Paper drawer is open (common)
2. Paper jam occurred (occasional)
3. Paper sensor is dirty (occasional)
4. Paper sensor defective (rare)

First check

Verify paper drawer position

Test point: Paper drawer
Expected: Drawer fully closed and latched

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

Alarm occurs but no sound issued patient safety

Visual alarm occurs but no audible alarm tone is generated

Ranked causes

1. Volume set to 0 (common)
2. Speaker defective (occasional)
3. Sound amplifier on Main CPU Board defective (rare)

First check

Check alarm volume setting

Test point: Audio settings menu
Expected: Alarm volume greater than 0

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

Battery malfunct INOP

INOP tone sounds and battery LED flashes; monitor cannot determine battery status or communication between battery and battery board fails

Ranked causes

1. Battery faulty (common)
2. Battery board defective (occasional)
3. Main board defective (rare)

First check

Test battery in different monitor or charger

Test point: Battery
Expected: Battery functions in known-good system

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

Charger malfunct INOP

INOP tone sounds; battery LED may flash indicating problem with battery charger in monitor

Ranked causes

1. Battery charger defective (common)
2. Battery board defective (occasional)
3. Main board defective (rare)

First check

Power cycle the monitor

Test point: Monitor power button
Expected: INOP clears after power off and on cycle

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

No test sound issued or INOP Speaker Malfunct message

Monitor does not issue test sound during boot or displays Speaker Malfunct INOP

Ranked causes

1. Speaker cable disconnected (common)
2. Speaker defective (occasional)
3. Main CPU Board defective (rare)

First check

Verify speaker cable connection

Test point: Speaker connector
Expected: Speaker cable firmly connected

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

Nurse Call Relay INOP message patient safety

System displays 'INOP message Check Nurse Call Relay' when monitor alarms but nurse call system not activated

Ranked causes

1. Flexible Nurse Call Relay I/O board defective (occasional)
2. Incorrect configuration present (Relay latency, Relay trigger) (common)
3. Cable connection defect (occasional)

First check

Verify monitor configuration settings

Test point: Main Setup menu
Expected: Relay latency and trigger parameters set per system requirements

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

Poor print quality

Printed output has reduced contrast, faint marks, or unclear trace definition

Ranked causes

1. Heat setting needs adjusting (common)
2. Thermal printhead dirty (occasional)
3. Thermal printhead failure (rare)

First check

Verify and adjust printhead heat setting

Test point: Recorder heat adjustment control
Expected: Heat setting produces clear, readable marks without smudging

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

Recorder paper blank

Recorder operates normally but no data marks appear on paper

Ranked causes

1. Thermal printhead disconnected (common)
2. Thermal printhead defective (occasional)
3. Wrong side of paper facing up (occasional)

First check

Verify thermal printhead connection

Test point: Printhead connector
Expected: Connector fully seated and latched

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

Settings Malfunct INOP

INOP message indicating problem with monitor settings storage or cloning process

Ranked causes

1. Problem during cloning process (common)
2. Settings memory space corrupted (occasional)
3. Main CPU Board defective (rare)

First check

Reclone configuration file via Support Tool

Test point: Support Tool connection and settings file
Expected: Configuration file successfully cloned and loaded

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

Speaker malfunction

Speaker cable disconnected or speaker defective; INOP Message Malfunct displayed or no alarm sound issued

Ranked causes

1. Speaker cable disconnected (common)
2. Speaker defective (occasional)
3. Sound amplifier on Main CPU Board defective (rare)

First check

Verify speaker cable connection

Test point: Speaker connector on main board
Expected: Cable fully inserted and seated

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

Check Monitor Temp INOP caution

INOP message displayed indicating internal monitor temperature is too high

Ranked causes

1. Environment temperature too high or ventilation blocked (common)
2. Main Board defective (occasional)

First check

Verify operating environment temperature and ventilation

Test point: Monitor placement and ambient temperature
Expected: Adequate airflow around monitor; ambient temperature within specifications

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

Check Settings INOP

INOP message displayed during normal operation indicating possible monitor software problem

Ranked causes

1. Monitor or patient settings unexpected or corrupted (common)
2. Software problem unresolved after default reload (occasional)

First check

Check monitor and patient settings

Test point: Setup menu
Expected: Settings as expected for current configuration

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

Check TI Config INOP

INOP message after software upgrade or option change indicating NST Report settings not configured

Ranked causes

1. NST Report Guideline not set or missing (common)
2. No NST Report Guideline available (occasional)

First check

Check NST Report Guideline setting

Test point: Setup menu NST Report Guideline option
Expected: Guideline set to appropriate value, not 'none'

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

Green LED blinks indicating cyclic reboots

Green power LED blinks repetitively indicating the monitor is rebooting continuously

Ranked causes

1. Hardware failure (common)
2. Software fault (occasional)

First check

Connect Support Tool and detect devices

Test point: Support Tool serial connection
Expected: Device detected or no device detected

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

Individual parameter INOP displayed

INOP message for specific parameter measurement (FHR, MECG, NBP, etc.) indicating equipment malfunction

Ranked causes

1. Transducer, sensor, patient module, or measurement board defective (common)
2. Bus Master firmware incompatible with new software (occasional)

First check

Determine if INOP is FHR1/FHR2/FHR3 related (for multi-transducer systems)

Test point: INOP message display
Expected: Identify which transducer has malfunction using blue Finder LED

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

Monitor loses settings after power loss exceeding one minute

When AC and battery power are lost for more than one minute, the monitor may load User Defaults or retain settings depending on Automat. Default configuration setting

Ranked causes

1. Automat. Default set to Yes (unknown)
2. Automat. Default set to No but power restored after 48 hours (unknown)

First check

Confirm duration of power loss

Test point: Monitor power status
Expected: Less than one minute or more than one minute

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

No USB devices functioning

None of the connected USB devices operate or are recognized by monitor

Ranked causes

1. USB port in monitor defective (common)
2. Invalid device combination or defective devices (occasional)

First check

Test each USB device individually on known-good port

Test point: Individual USB devices
Expected: At least one device functions on known-good USB port

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

No video on remote display

Connected remote display shows no video output from monitor

Ranked causes

1. Video cable not properly connected (common)
2. Remote display has no power (common)

First check

Verify video cable connections

Test point: Video cable connectors at monitor and display
Expected: Cable securely seated at both ends

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

Noninvasive blood pressure measurement out of accuracy specification

NBP reading differs from reference manometer by more than 3 mmHg or fails leakage/linearity/valve tests

Ranked causes

1. NBP measurement requires calibration (common)
2. Leakage in pressure system or valve (occasional)

First check

Accuracy test at 280 mmHg

Test point: NBP channel 1 and 2 readings
Expected: reading below 50 in Service Mode with static pressure applied mmHg

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

Paper not feeding properly

Paper does not advance smoothly through recorder mechanism during operation

Ranked causes

1. Paper incorrectly loaded (common)
2. Rubber roller dirty (occasional)

First check

Inspect paper loading and alignment

Test point: Paper in drawer
Expected: Paper centered, aligned properly with feed mechanism, not twisted

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

Temperature reading questionable; unusually low or high

Tympanic thermometer reading is uncertain, unreliable, or inconsistent; temperature shows as unusually low or high without apparent cause

Ranked causes

1. Wrong site mode configured (common)
2. Thermometer requires calibration (occasional)

First check

Verify site mode configuration

Test point: Thermometer configuration menu
Expected: Site mode setting matches measurement method (rectal, oral, tympanic, etc.)

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

Trace not printed correctly with reference to gridlines

Printed trace is offset or misaligned relative to paper gridlines

Ranked causes

1. Offset needs adjusting (common)
2. Wrong paper scale being used (occasional)

First check

Verify paper scale configuration

Test point: Paper pack label and recorder configuration menu
Expected: Paper scale label matches configured scale setting exactly

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

Tympanic thermometer does not function

Tympanic thermometer attached to monitor does not operate or respond

Ranked causes

1. No connection between thermometer and base station, or base station and monitor (common)
2. Thermometer defective (occasional)

First check

Verify base station to monitor connection

Test point: Interface cable connection between base station and host monitor
Expected: Cable fully connected and secure at both ends

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

Tympanic thermometer system error other than 12

Tympanic thermometer display shows system error code other than 12

Ranked causes

1. Probe cover damaged or not attached correctly (common)
2. Temperature probe defective (occasional)

First check

Reset thermometer with probe cover

Test point: Probe cover installation
Expected: System error clears after installing fresh probe cover

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

Accessory integrity compromised caution

Accessories (power cords, cables, connectors) show damage or defects

Ranked causes

1. Wear, damage, or degradation of accessory materials (occasional)

First check

Visually inspect all detachable power cords and accessory cables

Test point: Power cords, patient leads, adapter cables, connectors
Expected: No visible cracks, discoloration, or exposed conductors

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

All transducers (US, Toco, IUP, ECG) do not work

No transducers of any type function. 'INOP Bus Master Malfunc' message displayed.

Ranked causes

1. Bus Master Board is defective (common)

First check

Verify no transducer types function

Test point: All transducer inputs (US, Toco, IUP, ECG)
Expected: No transducers light Finder LED or produce output

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

Applied Part Leakage Current exceeds limit high voltage

Safety test failure: leakage current from applied part to earth exceeds 5000 μA (BF type) under single fault condition with mains on applied part

Ranked causes

1. System installation non-compliance or protective measures inadequate (common)

First check

Measure Applied Part Leakage Current from applied part to earth with mains on applied part

Test point: Applied part to earth connection
Expected: X1 <= 5000 μA (BF)
Tools: Safety test device with measuring circuit per IEC 62353

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

Applied part leakage current out of spec patient safety

Leakage current from applied part to earth exceeds acceptable limit when mains voltage is applied to applied part

Ranked causes

1. Insulation failure in applied part circuit (occasional)

First check

Measure applied part leakage current with mains on applied part (264 V)

Test point: Applied part connector (fetal sensor or SpO2, one at a time)
Expected: X1 ≤ 50 μA, ≤ 50 μA
Tools: Safety Analyzer with test adapter cable

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

Bad or distorted printout within first 1 cm

Printed trace shows distortion, poor quality, or missing data in first 1 cm of paper

Ranked causes

1. Paper drawer not fully closed before recording (common)

First check

Verify paper drawer closure

Test point: Paper drawer latch
Expected: Drawer fully closed and latched with audible click

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

Barcode scanner not reading information correctly

Barcode information does not appear in the patient admission field after scanning

Ranked causes

1. Barcode scanner window is dirty or obstructed (common)

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

Batt Empty INOP and battery LED flashes patient safety

INOP message and flashing battery LED indicating battery has less than 10 minutes remaining operating time

Ranked causes

1. Battery charge depleted; insufficient operating time remaining (common)

First check

Verify battery is charging via M8023A external power supply

Test point: Battery LED and M8023A connection
Expected: Battery LED yellow (charging) or green (>90% charged) after connection to power supply

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

Batt Incompat INOP patient safety

INOP message indicating battery installed is not compatible with this monitor model

Ranked causes

1. Incorrect or incompatible battery installed (common)

First check

Verify battery model number

Test point: Battery housing or M8023A power supply display
Expected: Battery model M4605A installed

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

Batt Low INOP patient safety

INOP message indicating battery has less than 20 minutes of operating time remaining

Ranked causes

1. Battery charge insufficient; less than 20 minutes operating time remaining (common)

First check

Initiate battery recharge

Test point: M8023A power supply connection and battery LED
Expected: Battery LED turns yellow (charging in progress)

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

Battery requires maintenance symbol displayed

Battery icon shows maintenance-required indicator on screen; time to empty and time to full display increasing inaccuracy

Ranked causes

1. Battery conditioning overdue (common)

First check

Verify battery charging state

Test point: Battery LED
Expected: Green (>90% charged)

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

Beeper sounds when power is lost on battery-equipped models

When power is lost (AC source or battery unavailable), an audible beeper alerts the operator; tone can be silenced by pressing On/Standby button

Ranked causes

1. Power loss from AC or battery (common)

First check

Verify power source status

Test point: AC power and battery
Expected: No power available from AC source or battery

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

Check Batt Temp INOP

INOP tone sounds indicating battery temperature is too high

Ranked causes

1. Monitor exposed to excessive heat (common)

First check

Verify monitor placement and ambient temperature

Test point: Monitor environment
Expected: Monitor in temperature range per specifications

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

Check Monitor Func INOP

INOP message displayed indicating problem with monitor voltages

Ranked causes

1. Problem with 5 V voltages in the monitor (common)

First check

Isolate defective I/O board

Test point: I/O board connections to main board
Expected: INOP clears when correct I/O board is reinserted or remains if main board defective

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

Configuration mode changes not saved patient safety

Settings changes made in Configuration Mode may be lost if not properly stored

Ranked causes

1. Settings not saved individually per Settings Block or Profile (common)

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

ECG electrode contact with conductive parts patient safety

Unsafe ECG measurement if electrodes contact conductive parts or earth

Ranked causes

1. ECG electrodes contacting conductive parts or earth (occasional)

First check

Inspect ECG electrode placement

Test point: ECG electrodes
Expected: Electrodes in contact with skin only, not touching metal or conductive parts

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

Equipment label not configured

Unique equipment label required for OB TraceVue/IntelliSpace Perinatal system integration not set

Ranked causes

1. Equipment label not entered in system (unknown)

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

Equipment leakage current out of spec high voltage

Leakage current from exposed metal parts exceeds acceptable limit during normal operation

Ranked causes

1. Insulation degradation of internal wiring or components (occasional)

First check

Measure equipment leakage current with S1 closed (normal condition)

Test point: Exposed metal parts (top cover, interface slot)
Expected: X1 ≤ 100 μA, ≤ 100 μA
Tools: Safety Analyzer

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

Equipment leakage current out of spec under single fault condition high voltage

Leakage current from exposed metal parts exceeds limit when protective earth is disconnected

Ranked causes

1. Failed component or compromised insulation under fault condition (occasional)

First check

Measure equipment leakage current with S1 open (single fault condition)

Test point: Exposed metal parts (top cover, interface slot)
Expected: X1 ≤ 100 μA, ≤ 100 μA
Tools: Safety Analyzer

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

Equipment mountings not correctly installed or insecure patient safety

Mounting hardware or fixtures are loose, improperly installed, or not secure

Ranked causes

1. Improper installation or loose fasteners (unknown)

First check

Inspect all equipment mountings

Test point: All mounting hardware and fixtures
Expected: All mountings correctly installed and secure

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

Excessive leakage current from multiple interconnected devices high voltage

Leakage current may exceed safety limits when several monitoring devices are interconnected

Ranked causes

1. Multiple monitoring devices interconnected (occasional)

First check

Count interconnected monitoring devices

Test point: patient cable connections
Expected: Minimal number of interconnected devices

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

Exterior housing cracked or damaged caution

Visual cracks or damage visible on the equipment exterior housings

Ranked causes

1. Physical impact or handling damage (unknown)

First check

Inspect all exterior housings for cracks and damage

Test point: Entire exterior surface
Expected: No cracks, splits, or damage visible

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

External cables damaged or cracked high voltage

Cables show splits, cracks, or signs of twisting during visual inspection

Ranked causes

1. Physical damage, wear, or improper handling (unknown)

First check

Inspect all external cables for damage

Test point: All external cables
Expected: No splits, cracks, or twisting visible

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

External cables damaged or kinked patient safety

Splits, cracks, or twisting visible on external cables

Ranked causes

1. Physical damage or improper handling (unknown)

First check

Inspect all external cables for splits, cracks, and twisting

Test point: Full length of each external cable
Expected: No splits, cracks, or signs of twisting

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

Fetal recorder printout quality is faint or degraded

Traces on printout become faint or unclear, indicating need for recorder maintenance

Ranked causes

1. Recorder rubber roller, thermal printhead, or paper sensor contaminated (common)

First check

Visual inspection of fetal recorder printout quality

Test point: recorder output
Expected: clear, legible traces

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

Foreign bodies or loose parts in device caution

Loose parts or foreign bodies remain inside device after servicing or repair

Ranked causes

1. Incomplete inspection or negligent assembly after service (occasional)

First check

Visually inspect interior for loose parts or foreign bodies

Test point: All internal cavities and circuit board areas
Expected: No loose parts or foreign bodies present

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

More symptoms

Fuse specification not met
Green LED stays on continuously
INOP FetRec Chk Config
INOP Printhead Overheat
INOP Wrong Paper Scale
Internal.Comm.Malf INOP
Line frequency setting incorrect
Mechanical integrity compromised
Monitor does not meet operational requirements on receipt
Monitor in shipment mode after delivery
Monitor malfunction during defibrillation
Monitor malfunction during electrosurgery
Monitor malfunction during MRI
Monitor returns to previous operating mode after electrical transient or burst
Monitor use in flammable anesthetic environment
Mountings not correctly installed or insecure
Nurse call relay operation verification
Paper scale setting not appropriate for installed paper
Physical damage visible on receipt
Post-installation system leakage current test not performed
Protective earth resistance out of spec
Recorder speed setting not appropriate
SpO2 measurement accuracy verification
System configuration validation before installation
Temperature reading unusually high
Temperature reading unusually low
Toco+ transducer adapter cable socket damaged
Toco+ transducer or patient module adapter cable socket damaged
Transducer appears not to work
Transducer belt button broken or damaged
Tympanic thermometer display blank
Tympanic thermometer system error 12

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

Error codes

Code	Meaning	Trigger	Severity
`Batt Empty INOP`	Battery empty; less than 10 minutes operating time remaining	Battery charge monitor detects battery depleted to critical level	critical
`Batt Incompat INOP`	Battery incompatible with this monitor	Battery installed is not the correct type for this monitor model	error
`Batt Low INOP`	Battery low; less than 20 minutes operating time remaining	Battery charge monitor detects battery charge below 20 minutes operating time threshold	warning
`Bus Master Malfunc`	Bus master board communication or function malfunction	Bus master board fails to communicate with other components or firmware incompatible after software upgrade	error
`Check Monitor Func`	Monitor voltage check failure; problem detected with internal 5 V power supply	Monitor self-test detects voltage regulation failure	warning
`Check Monitor Temp`	Monitor temperature check failure; internal temperature too high	Monitor thermal sensor detects temperature above normal operating range	warning
`Check Settings`	Monitor settings check failure; unexpected settings detected or software issue after upgrade	Monitor detects unexpected settings configuration or incomplete software upgrade	warning
`Check TI Config`	NST Report configuration check failure after software upgrade or option change	NST Report Guideline setting not configured after software upgrade or option change	warning
`FetRec Equip Malf`	Fetal recorder equipment malfunction	Recorder module or related electronics fails or disconnects	error
`FHR1 Equip Malf`	Fetal heart rate measurement equipment malfunction on channel 1	Ultrasound transducer or related electronics on FHR1 channel fails or disconnects	error
`FHR2 Equip Malf`	Fetal heart rate measurement equipment malfunction on channel 2	Ultrasound transducer or related electronics on FHR2 channel fails or disconnects	error
`FHR3 Equip Malf`	Fetal heart rate measurement equipment malfunction on channel 3	Ultrasound transducer or related electronics on FHR3 channel fails or disconnects	error
`INOP NBP Equip Malf`	NBP equipment malfunction in monitoring mode	Occurs after failed NBP calibration or accuracy/leakage test failure	error
`Internal.Comm.Malf`	Internal communication malfunction on main CPU board	Main CPU board detects communication failure with internal subsystems	error
`IUP Equip Malf`	Intrauterine pressure measurement equipment malfunction	Intrauterine pressure sensor or related electronics fails or disconnects	error
`MECG Equip Malf`	Maternal ECG measurement equipment malfunction	ECG sensor or related electronics fails or disconnects	error
`NBP Equip Malf`	Non-invasive blood pressure measurement equipment malfunction	Blood pressure sensor or related electronics fails or disconnects	error
`Settings Malfunct`	Settings storage or cloning malfunction	Settings cloning process fails or settings memory space corrupted	error
`SpO₂ Equip Malf`	Pulse oximetry equipment malfunction	Pulse oximetry sensor or related electronics fails or disconnects	error
`SpO₂ Sensor Malf`	Pulse oximetry sensor malfunction	Pulse oximetry sensor fails, disconnects, or is incompatible	error
`Toco Equip Malf`	Tocometry (contraction) measurement equipment malfunction	Tocometry sensor or related electronics fails or disconnects	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.