Vital signs monitors

Syntec VitMan: troubleshooting and error codes

The ServiceForge knowledge base holds 164 documented symptoms for the Syntec VitMan, with 298 ranked causes, 248 diagnostic checks with test points and expected values, and 100 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

50cc sensor problem displayed patient safety

Status line message appears when 50cc vacuum sensor monitoring small chamber of aspiration cassette indicates a problem. Vacuum level reads zero when vacuum should be present, or pressure present when cassette missing.

Ranked causes

1. 50cc sensor output voltage low (common)
2. A/D converter malfunction (occasional)
3. 50cc sensor malfunction (occasional)
4. Leak in aspiration system (occasional)
5. Pressure present on sensor port (rare)

First check

Read 50cc sensor output voltage using A/D converter

Test point: 50cc sensor port
Expected: Voltage greater than or equal to previously recorded atmospheric voltage

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

Bulb A missing

Status line message displayed if bulb A is not detected when VitMan is powered up or illumination is turned on while bulb A is selected.

Ranked causes

1. Bulb A not inserted (common)
2. Voltage across FET less than 2.5 volts (occasional)
3. Bulb power fuse open (occasional)
4. A/D converter malfunction (occasional)
5. +24 volt power supply failure (occasional)

First check

Visually inspect bulb A socket

Test point: Bulb A socket
Expected: Bulb A installed

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

Bulb A missing message displayed

Status line message displayed when bulb A is not detected during VitMan power-up

Ranked causes

1. Bulb A not installed or disconnected (common)
2. FET voltage across FET less than 2.5 volts (occasional)
3. A/D converter malfunction reports low voltage (occasional)
4. Bulb power fuse open (occasional)
5. +24V power supply output not present (occasional)

First check

Verify bulb A is installed and seated

Test point: Bulb A connector
Expected: Bulb A physically present and connected

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

Bulb A open

Status line message displayed when bulb A is not detected. Most likely solution is to replace the bulb.

Ranked causes

1. Bulb A failed or missing (common)
2. Voltage across FET less than 0.03 volts (occasional)
3. Bulb power fuse open (occasional)
4. A/D converter malfunction (occasional)
5. +24 volt power supply failure (occasional)

First check

Visually inspect bulb A

Test point: Bulb A socket
Expected: Bulb present and intact

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

Bulb A open message

Status line displays 'Bulb A open' when bulb A is not detected

Ranked causes

1. Bulb failed or loose (common)
2. Voltage across FET less than 0.03 volts (occasional)
3. A/D converter reports low voltage (occasional)
4. Bulb power fuse open (occasional)
5. +24 volt power supply failure (occasional)

First check

Measure voltage across FET

Test point: FET terminals
Expected: 0.03 volts or greater V
Tools: A/D converter

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

Bulb A open message displayed

Status line message displayed when bulb A is not detected, indicating bulb failure

Ranked causes

1. Bulb A filament open or failed (common)
2. FET voltage less than 0.03 volts (occasional)
3. A/D converter malfunction reports low voltage (occasional)
4. Bulb power fuse open (occasional)
5. +24V power supply output absent or low (occasional)

First check

Visually inspect bulb A

Test point: Bulb A element
Expected: Filament intact, no visible damage

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

Bulb B open

Status line message displayed indicating bulb B is not detected or has failed

Ranked causes

1. Bulb B failed or not installed (common)
2. FET voltage less than 0.03 volts (occasional)
3. Bulb power fuse open (occasional)
4. A/D converter reports low voltage (rare)
5. +24 volt power supply output missing (occasional)

First check

Verify bulb B is installed and functional

Test point: Bulb B socket
Expected: Bulb present and not burnt out

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

Low system pressure patient safety

Status line message displayed when main pressure pump pressure falls below acceptable levels. Vitrector, ultrasound and aspiration surgical functions are disabled when detected.

Ranked causes

1. Vitrector operating at high cut rate consuming excessive air (occasional)
2. Vitrector pressure regulator improperly adjusted too high (occasional)
3. Air leaks in system (occasional)
4. Clogged air filter (occasional)
5. Poor compressor performance (occasional)

First check

Measure main pump pressure

Test point: Main pressure pump
Expected: 2585 mmHg (50 psi) nominal

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

Low system pressure message patient safety

Main pressure pump below acceptable levels; vitrector, ultrasound and aspiration functions disabled

Ranked causes

1. Vitrector high cut rate air consumption (occasional)
2. Improper vitrector pressure regulator adjustment (occasional)
3. Air leaks in system (occasional)
4. Clogged air filter (occasional)
5. Poor compressor performance (occasional)

First check

Measure main pump pressure

Test point: Main pressure pump outlet
Expected: 2585 mmHg (50 psi) nominal; alert threshold 2172 mmHg (42 psi), Alert if below 2172 mmHg

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

Low system pressure message displayed patient safety

Status line displays 'Low system pressure' message; vitrector, ultrasound and aspiration surgical functions are disabled

Ranked causes

1. Vitrector operating at high cut rates consuming excessive air (occasional)
2. Improper vitrector pressure regulator adjustment (occasional)
3. Air leaks in system (occasional)
4. Clogged air filter (occasional)
5. Poor compressor performance (occasional)

First check

Verify main pump pressure reading

Test point: System pressure display
Expected: 2585 mmHg (50 psi) nominal; warning at 2172 mmHg (42 psi)

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

Bulb A missing message

Status line shows 'Bulb A missing' if bulb A is not detected when VitMan is powered up

Ranked causes

1. Voltage across FET less than 2.5 volts (common)
2. A/D converter reports low voltage (common)
3. Bulb power fuse open (common)
4. +24 volt output not present (common)

First check

Measure voltage across FET

Test point: FET terminals
Expected: 2.5 volts or greater V
Tools: A/D converter

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

Bulb B extremely low voltage across FET

Status line message displayed when voltage across FET is less than 0.03 volts

Ranked causes

1. FET voltage less than 0.03 volts (occasional)
2. A/D converter reports low voltage (occasional)
3. Bulb power fuse open (common)
4. Power supply +24V output failure (occasional)

First check

Measure voltage across FET

Test point: FET
Expected: 0.03 volts or less V

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

Bulb B missing message displayed

Status line message appears when bulb B not detected at power-up

Ranked causes

1. Voltage across FET less than 2.5 volts (common)
2. Bulb power fuse open (common)
3. +24 volt output of power supply not present (occasional)
4. A/D converter malfunction (rare)

First check

Measure voltage across FET at bulb circuit

Test point: Bulb FET drain-source
Expected: less than 2.5 volts if bulb missing

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

Bulb B open message displayed

Status line message when bulb B not detected during operation

Ranked causes

1. Bulb B failed or missing (common)
2. Voltage across FET less than 0.03 volts (occasional)
3. Bulb power fuse open (occasional)
4. +24V power supply output malfunction (occasional)

First check

Measure voltage across bulb FET

Test point: Bulb FET
Expected: greater than 0.03 volts when bulb functional

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

Diskette read problem

Message displayed when boot block, file allocation tables, root directory cannot be read, or data cable faulty, or disk drive power issue

Ranked causes

1. Floppy disk corruption or format issue (common)
2. Data cable between CPU board and disk drive is faulty (occasional)
3. No power present on disk drive (occasional)
4. Disk drive jumper missing or set to drive 0 (occasional)

First check

Attempt to reformat floppy disk

Test point: Disk drive
Expected: Format operation succeeds and disk is readable

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

Diskette read problem displayed

Status line shows read problem message, indicating inability to access disk boot block, file allocation tables or root directory

Ranked causes

1. Floppy disk requires formatting (occasional)
2. Faulty data cable between CPU board and disk drive (occasional)
3. No power to disk drive (occasional)
4. Disk drive jumper missing or selecting drive 0 (occasional)

Diskette read problem message displayed

Status line displays 'Diskette read problem' message; cannot read boot block, file allocation tables or root directory

Ranked causes

1. Data cable between CPU board and disk drive is faulty (occasional)
2. Power not present on disk drive (occasional)
3. Disk drive select jumper missing or set to drive 0 (occasional)
4. Floppy disk needs formatting (rare)

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

Eye sensor problem patient safety

Eye pressure sensor indicates problem; vacuum present when off or no pressure when on; sensor output voltage low

Ranked causes

1. Vacuum present on sensor when air exchange function off (occasional)
2. No pressure present when air exchange function on (occasional)
5. Pressure sensor malfunction (rare)
6. Leak in system pressure (occasional)

First check

Verify air exchange function status

Test point: air exchange surgical function
Expected: off

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

500cc sensor problem

Vacuum sensor monitoring vacuum pump pressure indicates a problem. Message displayed when aspiration cassette present with zero vacuum, or cassette missing with pressure present. May appear with Low vacuum level, Check cassette tubing, or Please lock cassette messages.

Ranked causes

2. Pressure present on sensor (occasional)
3. A/D converter problem (occasional)
4. Sensor malfunction (occasional)

First check

Measure 500cc sensor output voltage

Test point: Sensor port
Expected: Voltage reduced by atmospheric reference should match vacuum level present

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

50cc sensor problem

Vacuum sensor monitoring small chamber of aspiration cassette indicates problem. Message displayed when cassette present with zero vacuum when vacuum should be present, or cassette missing with pressure present.

Ranked causes

2. Pressure present on sensor (occasional)
3. A/D converter problem (occasional)
4. Sensor malfunction (occasional)

First check

Measure 50cc sensor output voltage

Test point: Sensor port
Expected: Voltage reduced by atmospheric reference should match vacuum level present

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

Air sensor problem

Pressure sensor indicates problem; vacuum present when function off or no pressure when on; sensor output voltage appears low

Ranked causes

1. Air sensor output voltage low (common)
2. Vacuum present when function disabled (occasional)
3. No pressure when function enabled (occasional)

First check

Measure sensor output voltage at A/D converter

Test point: A/D converter input for air sensor
Expected: Voltage above baseline atmospheric reading

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

Analog electronics board failure

Analog electronics board not functioning; signals lost or distorted from sensor inputs

Ranked causes

1. Loose or disconnected connector on analog electronics board (common)
2. PEEP EEPROM memory failure on analog electronics board (occasional)
3. Defective analog electronics board requiring replacement (rare)

First check

Run Cassette test

Test point: System test menu
Expected: Test passes without errors

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

Bulb A FET problem

Bulb A is present and enabled but not illuminated; status line displays error message

Ranked causes

1. Field effect transistor (FET) failure or malfunction (common)
2. A/D converter reporting incorrect voltage reading (occasional)
3. Voltage across FET exceeds 2.5 volts (occasional)

First check

Verify bulb A is physically present and enabled in configuration

Test point: Bulb A status in system menu
Expected: Enabled and detected

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

Bulb A not illuminated

Bulb A is present and enabled but does not light up; status line displays 'Bulb A FET problem' message

Ranked causes

1. Field effect transistor (FET) failure (common)
2. Voltage across FET exceeds 2.5 volts (common)
3. A/D converter fault (occasional)

First check

Verify bulb A is present and enabled

Test point: Status line display
Expected: Bulb A present and enabled state confirmed

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

Drive sensor problem

Pressure sensor for main compressor indicates system pressure is zero or output voltage is abnormally low

Ranked causes

1. Pressure sensor output voltage too low (common)
2. Pressure sensor malfunction (occasional)
3. Vacuum present at sensor port causing voltage offset error (rare)

First check

Measure pressure sensor output voltage at A/D converter input

Test point: Pressure sensor output line
Expected: Voltage above zero and greater than atmospheric baseline
Tools: Voltmeter or multimeter

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

Floppy fuse problem caution

Disk drive fuse on analog board has opened or is faulty. Disk drive power not present. Power cycle may clear if fuse is resettable.

Ranked causes

1. Floppy fuse open (common)
2. Power supply +12V output problem (occasional)
3. Disk drive +5V regulator failure (occasional)

First check

Verify floppy fuse is intact

Test point: Analog board floppy fuse
Expected: Fuse intact with continuity

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

Foot pedal problem patient safety

Status line message indicates foot pedal down switch malfunction while foot pedal position shows depression of 10% or more

Ranked causes

1. Foot pedal down switch internal failure (unknown)
2. Foot pedal cable damage or disconnection (unknown)
3. Foot pedal down switch sensor hardware failure (unknown)

First check

View foot pedal condition using calibration routine

Test point: Service Menu > Calibration Routines > Calibrate Foot Pedal
Expected: Foot pedal position and switch status displayed

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

Ground fault detected high voltage

Status line message indicates ultrasound handpiece is not properly grounded; no energy delivered to ungrounded handpiece

Ranked causes

1. Ultrasound handpiece not grounded (common)
2. Ground path interruption in output cable (occasional)
3. Ultrasound electronics board mounting hardware not grounded (occasional)

First check

Inspect front panel ultrasound output cable ground connection

Test point: Front panel ultrasound output cable connector
Expected: Connection secure and free of corrosion

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

Main compressor not running or weak output

Compressor fails to start, runs intermittently, or delivers insufficient pump pressure when configured to run

Ranked causes

1. Fuse F120 open or blown on main compressor board (common)
2. +12V supply voltage not present to compressor (UMC not configured) (occasional)
3. Compressor mechanical failure or blockage (rare)

First check

Inspect fuse F120 on main compressor board

Test point: Fuse F120
Expected: Fuse element intact and not discolored

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

No ultrasound present message displayed

Status line message appears when ultrasound on/off button is pressed but ultrasound option is not present or not functioning

Ranked causes

1. Ultrasound data cable disconnected (common)
2. No power to ultrasound board (occasional)
3. Serial EEPROM problem or not detected (occasional)

First check

Verify ultrasound data cable connection

Test point: Ultrasound board connector
Expected: Cable fully seated

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

Sensor or A/D converter problem

Status line message indicating sensor malfunction or A/D converter failure; may also indicate air exchange system leak

Ranked causes

1. Sensor malfunction (unknown)
2. A/D converter malfunction (unknown)
3. Air exchange system leak (unknown)

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

Service required message displayed patient safety

Status line message indicates serious problem detected; accompanied by other status messages identifying problem area

Ranked causes

1. Air exchange valve problem with excessive pressure difference (common)
2. Air pump unable to generate pressure (common)
3. Temperature sensor communication failure (occasional)

First check

Measure pressure difference between eye pressure sensor and air exchange pump pressure sensor

Test point: eye pressure sensor and air exchange pump pressure sensor
Expected: less than 15 mmHg (close to zero mmHg for low flow rate conditions), < 15 mmHg

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

Vacuum pump does not operate

Vacuum pump fails to function during system operation or test procedures.

Ranked causes

1. Missing or open connector on pump (common)
2. Electronic control module disconnected or loose connection (common)
3. Defective pump motor (occasional)

First check

Verify +12V CDV supply voltage presence

Test point: I+12V CDV connector
Expected: 12V present
Tools: DMM

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

Vacuum pump runs but insufficient pressure

Pump operates but fails to generate adequate vacuum pressure for system operation.

Ranked causes

1. Loose or disconnected inlet line on pump (common)
2. Clogged or kinked inlet hose (occasional)
3. Internal pump wear or seal degradation (rare)

First check

Verify inlet line connections

Test point: Pump inlet connection and hose
Expected: Connection secure, no leaks

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

-12 volt fuse problem high voltage

Status line message indicates -12 volt power not present on analog board; resettable fuse has opened

Ranked causes

1. Fuse F (-12V) open on analog board (common)
2. DC-DC converter failure (-12V supply) (occasional)

First check

Power cycle device

Test point: Main power switch
Expected: Device restarts normally without -12V fuse message

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

-22 volt fuse problem high voltage

Status line message indicates -22 volt power not present on analog board; resettable fuse opened; LCD contrast affected

Ranked causes

1. Fuse F (-22V) open on analog board (common)
2. DC-DC converter failure (-22V supply) (occasional)

First check

Power cycle device

Test point: Main power switch
Expected: Device restarts; LCD contrast restored; no -22V fuse message

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

+12 volt fuse problem high voltage

Status line message indicates +12 volt power not present on analog board; fuse has opened (resettable)

Ranked causes

1. Fuse F (12V) open on analog board (common)
2. DC-DC converter failure (12V supply) (occasional)

First check

Power cycle device

Test point: Main power switch
Expected: Device restarts normally without +12V fuse message

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

A/D reference voltage out of range

A/D converter reference voltage not at specified +5V (±5%)

Ranked causes

1. A/D reference potentiometer R32 incorrectly adjusted (common)
2. Fuse F111 open or blown (occasional)

First check

Measure A/D reference voltage

Test point: TP101 (GND)
Expected: +5V ±5%, ±0.25 V
Tools: DMM

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

Air pump fuse open

Air exchange pump fuse on analog board has opened; speaker will not operate; +24V power not present on pump control circuitry

Ranked causes

1. Fuse F (air pump) open on analog board (common)
2. +24V power supply output failure (occasional)

First check

Visually inspect air pump fuse on analog board

Test point: analog board fuse
Expected: fuse intact, not burned or open

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

Air pump fuse problem

Air exchange pump fuse on analog board has opened, +24V power not present on pump control circuitry. Speaker may not operate.

Ranked causes

1. Air pump fuse F open (analog board) (common)
2. +24V power supply output failure (occasional)

First check

Visual inspection of air pump fuse on analog board

Test point: Analog board fuse
Expected: Fuse intact, not open

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

Bulb A not illuminating caution

Bulb A is present and enabled but does not illuminate; status line displays message indicating hardware problem.

Ranked causes

1. Field effect transistor (FET) failure or excessive voltage across FET (common)
2. A/D converter malfunction reporting false high voltage (occasional)

First check

Measure voltage across FET

Test point: FET terminals
Expected: Less than 2.5 volts V, < 2.5 V
Tools: Multimeter

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

Bulb A problem

Status line displays 'Bulb A problem' when bulb detection logic indicates bulb A is on but illumination surgical function is off

Ranked causes

1. FET voltage between 0.03 and 2.5 volts with illumination off (common)
2. A/D converter problem reporting intermediate voltage (occasional)

First check

Measure voltage across FET

Test point: FET pins
Expected: Between 0.03 and 2.5 volts with illumination off V, to 2.5 V
Tools: Multimeter

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

Bulb A problem message

Status line displays 'Bulb A problem' if bulb detection logic indicates bulb A is on while illumination surgical function is off

Ranked causes

1. FET voltage between 0.03 and 2.5 volts when illumination off (common)
2. A/D converter reports voltage in problem range (occasional)

First check

Verify illumination surgical function is off

Test point: Illumination control
Expected: Illumination off

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

Bulb A problem message displayed

Status line message displayed when bulb detection logic indicates bulb A is on while illumination surgical function is off

Ranked causes

1. FET voltage between 0.03 and 2.5 volts with illumination off (occasional)
2. A/D converter malfunction reports intermediate voltage (occasional)

First check

Verify illumination function is off

Test point: Illumination control
Expected: Illumination function disabled

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

Bulb B excessive voltage across FET

Status line message displayed when voltage across FET exceeds 2.5 volts while bulb is enabled

Ranked causes

1. FET voltage greater than 2.5 volts with bulb enabled (occasional)
2. A/D converter reports high voltage (occasional)

First check

Measure voltage across FET

Test point: FET
Expected: Greater than 2.5 volts

Bulb B missing

Status line displays 'Bulb B missing' when bulb is not detected at power-up

Ranked causes

2. A/D converter reporting low voltage (occasional)
4. +24 volt output of power supply not present (occasional)

First check

Inspect bulb power fuse

Test point: Bulb power fuse
Expected: Fuse intact, continuity present

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

Bulb B problem message displayed

Status line message when bulb B detected as on while illumination surgical function is off

Ranked causes

1. Bulb detection logic false positive (unknown)
2. A/D converter malfunction reporting high voltage (rare)

First check

Verify illumination surgical function switch state

Test point: Illumination control
Expected: Function off

Bulb fuse problem caution

Status line message indicates illumination fuse on analog board has opened; bulb power not present

Ranked causes

1. Illumination fuse opened (common)
2. Power supply +24V output failure (occasional)

First check

Verify bulb power presence and fuse continuity

Test point: illumination fuse on analog board
Expected: Fuse intact and conductive

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

Device disabled due to high temperature patient safety

Status line displays 'Device disabled' when internal temperature reaches 55°C or higher; surgical functions become affected after ten seconds

Ranked causes

1. Internal device temperature at or above 55°C (unknown)
2. Temperature sensor malfunction or communication failure (unknown)

First check

Monitor internal device temperature

Test point: Temperature sensor on analog board
Expected: Below 55°C

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

Device disabled message appears patient safety

Status line displays 'Device disabled' message; after 10 seconds surgical functions affected

Ranked causes

1. Internal device temperature 55 °C or higher (common)
2. Temperature sensor malfunction or communication failure (occasional)

First check

Measure internal device temperature

Test point: Temperature sensor on analog board
Expected: Below 55 °C
Tools: Thermometer or temperature probe

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

Device disabled message displayed patient safety

Status line shows 'Device disabled' message; after 10 seconds surgical functions are affected. Illumination turns off, system pressure compressor and vacuum pump turn off, disabling aspiration, irrigation, vitrector and ultrasound. Air exchange remains unaffected.

Ranked causes

1. Internal device temperature 55 °C or higher (common)
2. Temperature sensor malfunction or communication failure (occasional)

First check

Verify internal device temperature

Test point: Temperature sensor on analog board
Expected: Below 55 °C

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

Drive fuse open

Status line message 'Drive fuse problem' displayed; main compressor (vitrector drive pressure) fuse on analog board has opened

Ranked causes

1. Fuse opened (common)
2. +12 volt power supply output problem (occasional)

First check

Measure +12 volt output at power supply

Test point: +12V rail
Expected: +12 volts

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

Drive fuse problem caution

Main compressor vitrector drive pressure fuse on analog board has opened; message displayed in status line

Ranked causes

1. Main compressor fuse on analog board is open (common)
2. Problem with +12 volt output of power supply (occasional)

First check

Inspect main compressor fuse on analog board

Test point: Fuse on analog board
Expected: Fuse intact and properly seated

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

Drive fuse problem displayed caution

Status line shows fuse problem message indicating main compressor fuse has opened

Ranked causes

1. Main compressor fuse opened on analog board (common)
2. Main compressor power not present (occasional)

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

Drive fuse problem message displayed

Status line displays 'Drive fuse problem'; main compressor fuse on analog board has opened

Ranked causes

1. Main compressor fuse opened (common)
2. +12 volt power supply output problem (occasional)

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

Drive sensor problem displayed

Status line shows sensor problem message indicating main compressor pressure sensor reading zero or low voltage

Ranked causes

1. System pressure sensor voltage appears low (common)
2. Vacuum present at sensor port (occasional)

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

Drive sensor problem message displayed

Status line displays 'Drive sensor problem'; pressure sensor indicates system pressure is zero or output voltage is low

Ranked causes

1. System pressure sensor output voltage is low (common)
2. Vacuum present on sensor port (rare)

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

Fan fuse problem caution

Fan fuse on analog board has opened or is faulty. Fan power not present. Power cycle may clear if fuse is resettable.

Ranked causes

1. Fan fuse open (common)
2. Power supply +12V output problem (occasional)

First check

Verify fan fuse is intact

Test point: Analog board fan fuse
Expected: Fuse intact with continuity

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

I+12V CDV present but pump fails to start

Power supply to pump is correct but motor does not respond or activate.

Ranked causes

1. Open or broken pump motor winding (occasional)
2. Control relay or driver circuit malfunction (occasional)

First check

Verify pump motor power and ground

Test point: Pump motor connectors
Expected: I+12V CDV present on one connector, ground on other

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

Low system pressure warning displayed caution

Status line message 'Low system pressure' shown when main pressure pump pressure drops below acceptable level; vitrector, ultrasound and aspiration functions disabled

Ranked causes

1. Main pump pressure below 2172 mmHg (42 psi) (occasional)
2. High vitrector cut rate consuming excessive air (occasional)

First check

Measure main pressure pump pressure

Test point: Main pump output
Expected: 2585 mmHg (50 psi) nominal; must be ≥ 2172 mmHg (42 psi), ≥ 2172 mmHg

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

More symptoms

Low temperature
Low temperature message displayed
Low temperature warning message displayed
Over temperature message displayed
Over temperature warning
Over temperature warning displayed
Over temperature warning message displayed
Pedal fuse problem detected
Pedal fuse problem message displayed
Shutdown at 55°C message displayed
Unit does not power on
Vacuum fuse problem
Air exchange check
Air exchange excess
Air exchange pressure display
Air exchange problem
Air exchange problem detected
Air exchange problem message displayed
Air pump hours exceeded
Air pump hours excess
Air pump pressure generation failure
Air pump problem
Air pump problem detected
Air pump problem detected at power-up
Air pump problem message displayed
Air sensor problem detected
Anterior Frag mode active
Aspiration threshold blocking valve
Aspiration threshold limit message displayed
Aspiration threshold prevents aspiration
Aspiration threshold prevents operation
Bulb A large hours
Bulb A large hours message
Bulb A large hours message displayed
Bulb B FET problem
Bulb B FET problem message
Bulb B FET problem message displayed
Bulb B large hours
Bulb B large hours alert (voltage high)
Bulb B large hours message
Bulb B large hours message displayed
Bulb B problem
Calibrate air pump
Calibrate foot pedal
Calibration: Aspiration Function
Calibration: Pressure Regulators
Calibration: Vacuum Regulator
Cassette full
Cassette over full
Cassette position bad
Contrast adjust message displayed
Contrast adjustment mode active
CPU electronics board failure
Device disabled due to high internal temperature
Disk space warning
Disk space warning message displayed
Disk write protected
Disk write protected message displayed
Diskette is full
Diskette is full message displayed
Eye pressure alarm
Floppy disk drive checkout
High cassette level
High pump pressure
High system pressure
High temperature
LED/backlight adjust
LED/backlight adjust message displayed
Lift pedal to prime
Lift pedal to prime message displayed
Lift pedal to reflux
Low air pump pressure
Low air pump pressure message displayed
Low air pump pressure warning displayed
Low temperature warning displayed
Low vacuum level
Low vacuum level message displayed
Low vacuum level warning displayed
No handpiece present message displayed
No keyboard heartbeat message displayed
No stage selected message displayed
No stages enabled message displayed
Over temperature
Overpressure detected
Overpressure detected message displayed
Overpressure detected warning
Overpressure detected warning message displayed
Overpressure warning displayed
Pedal fuse problem
Pedal fuse problem warning
Service required (air-related)
Shutdown at 55°C threshold
Stabilizing message displayed
Stabilizing message displayed at startup
Stage indicator message displayed
System fuse blown or open
Temp sensor problem message displayed
Temperature sensor problem message displayed
Temperature sensor undetectable
Threshold is xx mmHg message displayed
Unit powers on but display is blank
Vacuum pump hours exceeded
Valve fuse failure checkout
Valve fuse problem

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

Error codes

Code	Meaning	Trigger	Severity
`+12 volt fuse problem`	+12V power supply not present; fuse opened or DC-DC converter failed	+12V fuse opens or +12V DC-DC converter malfunction	error
`-12 volt fuse problem`	-12V fuse on analog board opened; -12V power supply failure	-12V supply lost or fuse opened	error
`+12 volt fuse problem`	12V fuse on analog board opened; 12V power supply failure	+12V supply lost or fuse opened	error
`-12 volt fuse problem`	-12V power supply not present; fuse opened or DC-DC converter failed	-12V fuse opens or -12V DC-DC converter malfunction	error
`+12 volt fuse problem`	+12 volt power not available on analog board	+12V fuse opens or DC-DC converter fails	error
`-12 volt fuse problem`	-12 volt power not available on analog board	-12V fuse opens or DC-DC converter fails	error
`-22 volt fuse problem`	-22V power supply not present; fuse opened or DC-DC converter failed; LCD contrast affected	-22V fuse opens or -22V DC-DC converter malfunction	error
`-22 volt fuse problem`	-22 volt power not available; LCD contrast lost or display unreadable	-22V fuse opens or DC-DC converter fails	error
`Air exchange problem`	Pressure difference between eye pressure sensor and air exchange pump pressure sensor exceeds safe limit	Pressure difference of 15 mmHg or greater detected when air exchange valve is open	error
`Air exchange set: xxx`	Air exchange surgical function is active; pressure setting is displayed	Air exchange surgical function enabled	info
`Air pump fuse problem`	Air exchange pump fuse on analog board has opened; fuse must be replaced to clear error	Non-resettable fuse fails; also occurs if +24V output of power supply fails	error
`Air pump hours excess`	Air pump runtime has exceeded maximum limit of 2000 hours; pneumatics module requires service	Air pump cumulative run time exceeds 2000 hours	warning
`Air pump problem`	Air exchange pump unable to generate pressure during power-up self-test	Power-up test detects no pressure generation from air exchange pump when surgical function enabled	error
`Air sensor problem`	Pressure sensor indicates problem; low output voltage detected	Function off and vacuum present, or function on and no pressure present; sensor output voltage less than baseline atmospheric voltage	warning
`Bulb A FET problem`	Bulb A is not illuminating despite being enabled and present	Bulb A enabled but not lit or FET voltage exceeds 2.5V	error
`Bulb A FET problem`	Bulb A illumination failure due to FET or A/D converter fault	Bulb A enabled but not illuminated; FET voltage exceeds 2.5 V or A/D converter malfunction detected	error
`Bulb A hours xxx`	Bulb A in-use time display in hours	Illumination surgical function turned on with bulb A selected	info
`Bulb A hours xxx`	Operating hours status for bulb A	When illumination surgical function is turned on with bulb A selected	info
`Bulb A large hours`	Bulb A operation time exceeds safe usage limit	VitMan powered up or illumination turned on with bulb A selected and hours > 40	warning
`Bulb A large hours`	Bulb A has exceeded 40 operating hours	VitMan powered up or illumination turned on with bulb A selected and hours exceed 40	warning
`Bulb A missing`	Bulb A not detected by the system	VitMan powered up or illumination turned on with bulb A selected; bulb detection voltage below 2.5V threshold	warning
`Bulb A open`	Bulb A filament detected as open or defective	Bulb A not detected after installation; FET voltage below 0.03V or fuse open or +24V supply failed	error
`Bulb A open`	Bulb A not detected	Bulb A cannot be detected by monitoring circuit	error
`Bulb A problem`	Bulb A appears on while illumination function is disabled	FET voltage between 0.03V and 2.5V when illumination is off; A/D converter reads erroneous voltage in this range	warning
`Bulb B FET problem`	Bulb B FET circuit failure preventing bulb illumination	Bulb B installed and enabled but does not illuminate; FET not switching properly	error
`Bulb B FET problem`	Bulb B present and enabled but not illuminating due to FET hardware failure	Bulb B enabled and installed but no illumination occurs	error
`Bulb B hours xxx`	In-use time display for bulb B in hours	Illumination surgical function turned on with bulb B selected	info
`Bulb "B" hours xxx`	Displays current operating hours of bulb B (xxx = hours)	Illumination surgical function is turned on with bulb B selected	info
`Bulb B large hours`	Bulb B operating time has exceeded design life threshold	Power-up or when illumination turned on with bulb B selected and hours exceed 40	info
`Bulb "B" large hours`	Bulb B operating hours exceed safe service life	Bulb B hours exceed 40 hours at power-up or when illumination is turned on	warning
`Bulb B missing`	Bulb B not detected at power-up or when illumination turned on	FET voltage below 2.5V or A/D converter fault or fuse open or +24V absent	warning
`Bulb "B" missing`	Bulb B is not detected at power-up	FET voltage drops below 2.5 volts at startup, bulb not installed, fuse open, or +24V missing	warning
`Bulb B open`	Bulb B not detected after power-up	FET voltage less than 0.03 volts	error
`Bulb B open`	Bulb B filament open or failed	When bulb B not detected during operation	warning
`Bulb "B" open`	Bulb B is not detected or has failed open circuit	FET voltage across bulb circuit drops below 0.03 volts, or bulb power fuse opens, or +24V supply fails	warning
`Bulb B problem`	Bulb detection logic indicates bulb B is on while illumination surgical function is off	Bulb B enabled state does not match illumination function state	warning
`Bulb "B" problem`	Bulb B detection logic indicates bulb is on while illumination function is off	Bulb detection logic detects illumination signal when surgical function is disabled	error
`Bulb fuse problem`	Illumination fuse on analog board has opened or bulb power not present	Fuse opens or power supply +24V output fails	warning
`Calibrate air pump`	Air exchange calibration tables are invalid	Invalid calibration data detected	warning
`Calibrate aspiration`	Aspiration operation calibration tables are invalid	Invalid calibration data detected	warning
`Calibrate foot pedal`	Foot pedal calibration tables are invalid	Invalid calibration data detected	warning
`Cassette full`	Aspiration cassette has reached first level fullness warning threshold	Approximately 300 cc of fluid aspirated	info
`Cassette over full`	Aspiration cassette has exceeded maximum capacity; vacuum pump is disabled	Approximately 325 cc of fluid aspirated	critical
`Cassette position bad`	Aspiration cassette is not properly aligned in cassette chamber	Cassette inserted without proper lock knob rotation	error
`Contrast adjust`	LCD contrast adjustment in progress	LEFT ARROW or RIGHT ARROW pressed while not in menu mode	info
`Currently in stage 1`	Status line message indicating operation in stage 1 mode	Stage button pressed and released when in stage 1	info
`Currently in stage 2`	Status line message indicating operation in stage 2 mode	Stage button pressed and released when in stage 2	info
`Currently in stage 3`	Status line message indicating operation in stage 3 mode	Stage button pressed and released when in stage 3	info
`Currently in stage 4`	Status line message indicating operation in stage 4 mode	Stage button pressed and released when in stage 4	info
`Currently in stage 5`	Status line message indicating operation in stage 5 mode	Stage button pressed and released when in stage 5	info
`Currently in stage 6`	Status line message indicating operation in stage 6 mode	Stage button pressed and released when in stage 6	info
`Currently in stage 7`	Status line message indicating operation in stage 7 mode	Stage button pressed and released when in stage 7	info
`Device disabled`	System has disabled surgical functions due to overtemperature condition	Internal device temperature reaches 55°C or higher	critical
`Device disabled`	Internal device temperature is 55 °C or higher and surgical functions are being shut down	Internal temperature reaches or exceeds 55 °C	warning
`Disk available hh:mm`	Minimum time remaining to record data on floppy disk in hours and minutes format	Displayed after data from previous minute is saved to disk	info
`Disk available hh:mm`	Floppy disk space status message showing minimum time remaining to record data	Displayed in status line after each minute of data is saved to disk	info
`Diskette is full`	Floppy disk has no remaining free space for data recording	Disk space exhausted during data save operation	error
`Diskette is full`	No free space remains on floppy disk for data storage	When all disk capacity is consumed	error
`Diskette read problem`	Floppy disk structure is corrupted or disk drive connection is faulty	Boot block, file allocation tables, or root directory cannot be read from disk	error
`Diskette read problem`	Unable to read boot block, file allocation tables or root directory on floppy disk	Boot block, file allocation tables or root directory cannot be accessed	error
`Disk space warning`	Disk available time below threshold	Minimum time remaining less than 30 minutes	warning
`Disk space warning`	Available disk space is critically low	When minimum time remaining is less than 30 minutes	warning
`Disk space warning`	Minimum time remaining on floppy disk is less than 30 minutes	Insufficient free space on floppy disk	warning
`Disk space warning`	Warning message displayed when floppy disk free space is low	Minimum time remaining is less than 30 minutes	warning
`Disk write protected`	Cannot save data to floppy disk due to write protection	Checked when attempting to save data to disk	error
`Drive fuse problem`	Main compressor fuse on analog board has opened; no power to compressor	When main compressor fuse opens due to overcurrent or power surge	error
`Drive sensor problem`	Pressure sensor monitoring main compressor indicates fault condition or zero pressure reading	Sensor output voltage indicates zero pressure or voltage appears low	warning
`Eye pressure alarm`	Current eye pressure not within 5 mmHg of set point during air exchange surgical function	Air exchange surgical function active and eye pressure deviates from set point	warning
`Eye sensor problem`	Eye pressure sensor is indicating a malfunction or vacuum/pressure condition error	Air exchange function off with vacuum present, or on with no pressure present; sensor voltage low	error
`Fan fuse problem`	Fan fuse on analog board has opened or fan power is not present	Fan fuse opens; +12V power supply output fails	warning
`Floppy fuse problem`	Disk drive fuse on analog board has opened or disk drive power is not present	Floppy fuse opens; +12V or +5V power fails	warning
`Foot pedal is active`	Foot pedal is active; several user actions are prohibited	Foot pedal engaged during operation	info
`Foot pedal problem`	Foot pedal down switch indicates up position while foot pedal position shows ≥10% depression	Foot pedal down switch malfunction or cable/connector failure	warning
`Ground fault detected`	Ultrasound handpiece is not properly grounded	Ground path interruption or handpiece not seated	error
`High cassette level`	Aspiration cassette fluid level is high (first warning level)	Approximately 250 cc of fluid aspirated into cassette	warning
`High pump pressure`	Air exchange pump pressure exceeds set point by more than 8 mmHg	Air exchange surgical function active and pump pressure high	warning
`High system pressure`	Main pressure pump pressure exceeds upper limit (2844 mmHg / 55 psi)	Main pump pressure above 2844 mmHg (55 psi)	warning
`High temperature`	Internal device temperature is 50 °C or higher	Internal device temperature reaches or exceeds 50 °C	warning
`Hold to enter stage 4`	Stage four is ready to be entered	Stage button pressed and held when stage four will be entered upon release	info
`Now saving stage 3`	System is saving current machine state to stage three memory	Stage button is pressed and held while in stage three save mode	info
`Now saving stage 4`	System is saving current machine state to stage four memory	Stage button is pressed and held while in stage four save mode	info
`Now saving stage 5`	System is saving current machine state to stage five memory	Stage button is pressed and held while in stage five save mode	info
`Now saving stage 6`	System is saving current machine state to stage six memory	Stage button is pressed and held while in stage six save mode	info
`Now saving stage 7`	System is saving current machine state to stage seven memory	Stage button is pressed and held while in stage seven save mode	info
`Overpressure detected`	Eye pressure exceeds the configured warning pressure limit	Current eye pressure exceeds warning pressure limit	warning
`Over temperature`	Internal device temperature has reached 53°C or higher; warning condition only	Internal temperature sensor reading >= 53°C	warning
`Pedal fuse problem`	Foot pedal fuse on CPU board has opened; foot pedal power supply failure	Foot pedal fuse opens due to overcurrent or fault condition	warning
`Service required`	Serious problem detected requiring VitMan repair	Various hardware problems detected during operation or startup	critical
`Shutdown at 55°C`	Internal device temperature at or above 53°C but below 55°C	Temperature sensor on analog board reports internal temperature >= 53°C	warning
`Stabilizing...`	Hardware problem detected during pressure sensor thermal stabilization phase; device non-functional	Hardware malfunction detected while pressure sensors are thermally stabilizing at power-up	critical
`Stage 3 selected`	Stage 3 is selected and ready to enter	Stage button pressed and held, then released	info
`Stage 4 selected`	Stage 4 is selected and ready to enter	Stage button pressed and held, then released	info
`Stage 5 selected`	Stage 5 is selected and ready to enter	Stage button pressed and held, then released	info
`Stage 6 selected`	Stage 6 is selected and ready to enter	Stage button pressed and held, then released	info
`Stage 7 selected`	Stage 7 is selected and ready to enter	Stage button pressed and held, then released	info
`Temp sensor problem`	Temperature sensor is undetectable or not communicating properly	Temperature sensor fails to establish communication with system	warning
`Threshold is xx mmHg`	Aspiration operation prevented by threshold setting; xx shows current threshold value in mmHg	Aspiration valve cannot open because vacuum level does not meet threshold requirement	warning
`Vacuum fuse problem`	Vacuum pump fuse on analog board has opened	Vacuum pump fuse opens; vacuum pump power not present	warning
`Vacuum pump hours`	Vacuum pump runtime has exceeded maximum service interval	Pump operating hours exceed threshold	info
`Valve fuse problem`	Valve fuse on analog board has opened	Valve fuse opens due to overcurrent or age	warning

Likely causes and actions for each code are in ServiceForge. Connect ServiceForge to your AI

Community

0 fixes logged by technicians through their AI, with outcomes, for this model.

ServiceForge knowledge base record. Field-unverified unless technicians confirmed it. A teaching summary of the record, not a service manual. Export 2026-10-14.