Patient monitors

Critikon Dinamap Compact: troubleshooting and error codes

The ServiceForge knowledge base holds 68 documented symptoms for the Critikon Dinamap Compact, with 150 ranked causes, 117 diagnostic checks with test points and expected values, and 45 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Incorrect or no LCD output

LCD display shows incorrect information or is blank

Ranked causes

1. LCD board fault (common)
2. Addressing fault on switch board or main board (occasional)
3. LCD negative supply out of specification (occasional)

First check

Test LCD board operation

Test point: LCD Board
Expected: LCD displays correctly

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

Incorrect or no LCD output

LCD display shows no information or incorrect display content

Ranked causes

1. LCD Board fault (common)
2. Addressing fault on Switch Board or Main Board (occasional)
3. Negative supply to LCD module out of specification (occasional)

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

Incorrect or no LED display output

LED display shows incorrect information, is blank, or partially dark

Ranked causes

1. LED display board fault (common)
2. Addressing fault on switch board or main board (occasional)
3. 4.5V VDISP supply absent or low (occasional)

First check

Measure +4.5V VDISP supply voltage

Test point: Display Board power input
Expected: +4.5V present and stable

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

Incorrect or no LED display output

LED display shows no information, is dim, or displays incorrect data

Ranked causes

1. LED Display Board fault (common)
2. Addressing fault on Switch Board or Main Board (occasional)
3. No or low +4.5V VDISP supply (occasional)

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

NIBP measurement pump laboring with low frequency sound (N33 or N00 message) patient safety

During NIBP determination pump operates at lower than normal frequency or intensity; N33 timeout inflation or N00 overpressure warning may display

Ranked causes

1. Kinked hose to cuff or faulty cuff (common)
2. Blocked or kinked hose from pump output to front panel (occasional)
3. Pneumatic assembly fault (occasional)

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

NIBP measurement timeout - N44, N55, or N99 error patient safety

NIBP measurement fails with N44 (timeout total time), N55 (timeout pressure), or N99 (no determination) error

Ranked causes

1. Excessive patient movement (motion artifact) (common)
2. Main board NIBP circuitry fault or pressure measurement problem (occasional)
3. Pneumatic problem with cuff deflation or pressure measurement (occasional)

First check

Eliminate motion artifact conditions

Test point: Patient and monitor position
Expected: Unit stable and patient movement minimized

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

NIBP overpressure warning displayed when pump starts with cuff attached patient safety

LCD displays NIBP overpressure alert when pump activates with cuff properly connected

Ranked causes

1. Kinked hose to cuff or faulty cuff (common)
2. Blocked or kinked hose from front panel to main board pressure sensor ML1 (occasional)
3. Main board fault (occasional)

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

NIBP overpressure warning with cuff attached patient safety

NIBP overpressure warning displayed when pump starts with cuff properly attached

Ranked causes

1. Kinked hose to cuff or faulty cuff (common)
2. Blocked or kinked hose from front panel to main board pressure sensor (common)
3. Main board fault (ML1, IC5 or IC7) (occasional)

First check

Test unit with known good cuff

Test point: NIBP cuff connector
Expected: Unit operates normally with known good cuff

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

NIBP pump laboring (low frequency sound) patient safety

When NIBP determination starts pump sounds labored with lower frequency than normal; may include N33 or N00 warnings

Ranked causes

1. Kinked hose to cuff or faulty cuff (common)
2. Blocked or kinked hose from pump output to front panel (common)
3. Pneumatic assembly fault (occasional)

First check

Test unit with known good cuff

Test point: NIBP cuff connector
Expected: Pump operates normally with known good cuff

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

No LCD backlight

LCD display is dark with no backlight illumination

Ranked causes

1. LCD Board fault (common)
2. Display Board fault (occasional)
3. Addressing fault on Switch Board or Main Board (occasional)

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

No LCD backlight

LCD display is present but backlight does not illuminate

Ranked causes

1. LCD board fault (common)
2. Display board fault (common)
3. Addressing fault on switch board or main board (occasional)

First check

Check backlight switch TR1 and backlight supply

Test point: PL31 Pin 2 with respect to Pin 1
Expected: +Vbacklight present

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

No rotor response

Unit does not respond when rotor is turned

Ranked causes

1. Rotor failure (common)
2. Switch board failure (occasional)
3. Main board failure (occasional)

First check

Test rotor operation

Test point: Rotor assembly
Expected: Rotor responds to manual rotation

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

No rotor response

Unit does not respond when rotor is manipulated

Ranked causes

1. Rotor failure (common)
2. Switch Board failure (occasional)
3. Main Board failure (occasional)

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

Pump over-current alarm

Unit alarms with pump over-current message on LCD indicating pump current limit exceeded

Ranked causes

1. Pump failure or mechanical jam (common)
2. PSU board pump current sense circuitry fault (occasional)
3. Main board fault (occasional)

First check

Test pump assembly operation

Test point: Pump motor
Expected: Pump operates without excessive current draw or jamming

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

Rotor menu selection skips items

When rotor is turned, menus skip over items instead of advancing normally

Ranked causes

1. One digit of grey code not functioning (common)
2. Rotor failure (common)
3. Switch board failure (occasional)

First check

Test rotor grey code output

Test point: Rotor grey code outputs
Expected: All grey code bits functioning

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

SpO2 no signal error (P55 error)

LCD displays P55 error message indicating no SpO2 signal detected

Ranked causes

1. Faulty finger probe (common)
2. Faulty SpO2 module to front panel cable (occasional)
3. SpO2 module fault (occasional)

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

SpO2 no signal error (P55 Error)

LCD displays P55 Error indicating SpO2 module is connected but receiving no valid signal

Ranked causes

1. Faulty finger probe sensor (common)
2. Faulty SpO2 module to front panel cable (common)
3. SpO2 module fault (occasional)

First check

Test with known good SpO2 sensor

Test point: SpO2 probe connector
Expected: Unit detects signal from known good probe

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

SpO2 probe disconnected error (P00 Error)

LCD displays P00 Error indicating SpO2 probe is disconnected or not detected

Ranked causes

1. Faulty finger probe sensor (common)
2. Faulty SpO2 module to front panel cable (common)
3. SpO2 module fault (occasional)

First check

Test with known good SpO2 sensor

Test point: SpO2 probe connector
Expected: Unit recognizes known good probe

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

SpO2 probe disconnected error reported on LCD (P00 error)

LCD displays P00 error message indicating SpO2 probe disconnection

Ranked causes

1. Faulty finger probe (common)
2. Faulty SpO2 module to front panel cable (occasional)
3. SpO2 module fault (occasional)

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

System error P105, P110, or P115 alarm and message on LCD after power-up patient safety

Alarm sounds with system error message displayed on LCD display after unit completes power-up sequence

Ranked causes

1. SpO2 module fault (common)
2. Isolated power supply module failure on Main Board (occasional)
3. Main Board processor SpO2 RS232 communications failure (occasional)

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

System error P105, P110, or P115 at power-up

Unit alarms at power-up with system error message P105, P110, or P115 on LCD

Ranked causes

1. SpO2 module fault (common)
2. Isolated power supply module failure on main board (occasional)
3. Main board processor SpO2 RS232 communications failure (occasional)

First check

Swap and test SpO2 module

Test point: SpO2 module
Expected: Unit powers up without P105/P110/P115 error

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

Unit alarms 'PIC: +/-12V Out of Spec'

LCD displays '+/-12V Out of Spec' alarm with code line failure indication

Ranked causes

1. PSU Board or Main Board fault (common)
2. Low input voltage to IC18 or IC19 causing regulator dropout (occasional)
3. Excessive current on +12VV supply or erroneous TR10 operation (occasional)

First check

Measure +12VR and -12VR rail voltages

Test point: PSU Board +12VR and -12VR outputs
Expected: Within specification as documented

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

Unit alarms 'Pump Over Current' patient safety

LCD displays 'Pump Over Current 0,(code line failure),0,0' alarm message

Ranked causes

1. Pump failure (common)
2. PSU Board failure of pump current sense circuitry (occasional)
3. Main Board failure (occasional)

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

Unit does not power on from external DC source

Unit fails to switch on when connected to external DC adapter

Ranked causes

1. External DC adapter output out of specification (common)
2. External DC fuse blown (common)
3. Power supply board fault (occasional)

First check

Measure external DC adapter output voltage

Test point: EXT DC adapter output
Expected: Within specification

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

Unit will not switch on from either battery or external DC source caution

Unit completely unresponsive to power input from all sources

Ranked causes

1. On/Off switch faulty (common)
2. +5VD supply low or out of specification (occasional)
3. PIC Processor not running (occasional)

First check

Test unit power on using rotor switch

Test point: Rotor switch
Expected: Unit powers on

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

Unit will not switch on from external DC source

Unit does not power on when connected to external DC adapter

Ranked causes

1. External DC adapter output out of specification (common)
2. External DC fuse blown (common)
3. Power supply unit board fault (occasional)

First check

Measure external DC adapter output voltage

Test point: EXT DC adapter output terminals
Expected: Within specification

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

Calibration: NIBP pop-off pressure adjustment caution

Set the neonatal overpressure threshold; adult threshold is automatically double. Requires Main Board disassembly and jumper LK1.

Ranked causes

1. Pop-off pressure adjustment required (occasional)
2. Overpressure during calibration (rare)

First check

Verify zero pressure baseline before calibration

Test point: calibration pressure measurement system
Expected: 0 mmHg (0 mBar)

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

Calibration: NIBP pop-off pressure check (Adult mode)

Verify the adult mode overpressure detection system prevents excessive cuff inflation by checking pop-off pressure.

Ranked causes

1. Periodic pop-off pressure verification required for adult mode (common)
2. Adult pop-off pressure out of range (rare)

First check

Monitor inflation and pop-off in adult mode

Test point: calibration pressure measurement system
Expected: System inflates then immediately deflates; pump stops; Overpressure alarm reported

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

Calibration: NIBP pop-off pressure check (Neonate mode) caution

Verify the overpressure detection system prevents excessive cuff inflation by checking pop-off pressure is within specifications.

Ranked causes

1. Periodic pop-off pressure verification required (common)
2. Pop-off pressure out of range (rare)

First check

Verify calibration kit connection

Test point: calibration kit to DINAMAP™ Compact connector
Expected: Connected as shown on page 41

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

Calibration: NIBP pressure

Monitor requires pressure calibration using external measurement system to establish zero and 200 mmHg reference points for accurate blood pressure readings.

Ranked causes

1. Calibration procedure required (common)
2. Calibration failed (occasional)

First check

Verify zero pressure reading

Test point: calibration pressure measurement system display
Expected: 0 mmHg (0 mBar)

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

Calibration: Predictive temperature

Adjustment of temperature calibration circuitry via potentiometers RV2 and RV3 on Main Board. Procedure varies by software version.

Ranked causes

1. Temperature calibration requires potentiometer adjustment per software version (common)
2. Record calibration timestamp (common)

First check

Verify temperature calibration plug resistance

Test point: Pins 1 and 2 of temperature calibration plug (320-635)
Expected: 6090Ω, ±7Ω

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

Calibration: Temperature sensor adjustment caution

Calibrate predictive temperature circuitry by adjusting potentiometers RV2 and RV3 on Main Board. Requires disassembly and precise edge count measurements.

Ranked causes

1. Temperature calibration adjustment required (occasional)
2. Temperature reading not 98.6°F after adjustment (rare)

First check

Adjust RV2 potentiometer

Test point: RV2 potentiometer on Main Board; edge counter display
Expected: Edge count for Calibration PLUG = 957
Tools: edge counter display on UUT LCD

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

Calibration: Temperature sensor check caution

Verify temperature detection circuit calibration using precision calibration plug (320-635) every 12 months or when readings are doubtful.

Ranked causes

1. Periodic temperature calibration check required (common)
2. Temperature reading out of calibration (occasional)

First check

Insert calibration plug without twisting

Test point: temperature probe connector on front of monitor
Expected: Plug seated firmly without rotation
Tools: calibration plug part 320-635

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

N12 error displayed with alarm and blank LCD patient safety

N12 error code shown on systolic display, alarm sounds, and LCD display is blank

Ranked causes

1. Pneumatic system state does not match software expectation (common)
2. Valve control circuitry fault preventing cuff deflation (common)

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

N12 error with blank LCD and alarm patient safety

N12 error displayed on systolic display with blank LCD and alarm sounding; indicates pneumatic system state mismatch

Ranked causes

1. Valve control circuitry fault preventing cuff deflation (common)
2. Main board fault (IC3) (occasional)

First check

Determine valve drive status

Test point: Pneumatics Control circuitry
Expected: Valve drive circuit functions correctly

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

N13 error displayed with alarm and blank LCD patient safety

N13 error code shown on systolic display, alarm sounds, and LCD display is blank

Ranked causes

1. Pump runs continuously on power-up or when it should be off (common)
2. Main board failure with IC3 defect (occasional)

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

N13 error with blank LCD and alarm patient safety

N13 error displayed on systolic display with blank LCD and alarm sounding; indicates pump continues running when it should be off

Ranked causes

1. Pump continuous operation or failure to turn off (Pneumatics Control IC1 or defective pump current measurement) (common)
2. Main board fault (IC3) (occasional)

First check

Check pump operating status and current measurement

Test point: Pump motor current sense circuitry on PSU Board
Expected: Pump turns off when commanded; current measurement is accurate

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

NIBP measurement no determination error (N99) patient safety

LCD displays 'N99-No determination' message when NIBP measurement is attempted

Ranked causes

1. Patient motion artifact or main board NIBP circuitry fault or PSU board pneumatic control fault or pneumatic assembly fault (common)
2. NIBP pulse determination circuitry fault on main board (occasional)

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

NIBP measurement timeout pressure error (N55) patient safety

LCD displays 'N55-NIBP: Timeout Pressure' message during NIBP measurement attempt

Ranked causes

1. Patient motion artifact (common)
2. Main board NIBP circuitry fault or PSU board pneumatic control fault or pneumatic assembly fault (occasional)

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

NIBP measurement timeout total time error (N44) patient safety

LCD displays 'N44-NIBP: Timeout Total Time' message during NIBP measurement attempt

Ranked causes

1. Patient motion artifact (common)
2. Main board NIBP circuitry fault or PSU board pneumatic control fault or pneumatic assembly fault (occasional)

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

NIBP overpressure warning displayed when pump starts (no cuff attached) patient safety

LCD displays NIBP overpressure alert when pump activates even without cuff connected to unit

Ranked causes

1. Blocked or kinked hose from pump output to front panel (common)
2. Pneumatic assembly fault (occasional)

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

NIBP overpressure warning without cuff attached patient safety

NIBP overpressure warning displayed on LCD when pump starts, even without cuff attached

Ranked causes

1. Blocked or kinked hose from pump output to front panel (common)
2. Pneumatic assembly fault (occasional)

First check

Inspect pneumatic hose from pump to front panel

Test point: Pump output hose
Expected: Hose clear and not kinked

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

No keypad response

Unit does not respond when keys are pressed

Ranked causes

1. Switch board failure (common)
2. Main board failure (occasional)

First check

Test switch board operation

Test point: Switch Board
Expected: Keypad signals present and correct

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

No keyswitch response

Unit does not respond when keys are pressed

Ranked causes

1. Switch Board failure (common)
2. Main Board failure (occasional)

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

No response to host communications

Unit does not communicate with external host system

Ranked causes

1. Power supply board fault (common)
2. Main board fault (occasional)

First check

Check PSU board to host communications port cable

Test point: Rear panel host comms cable
Expected: Cable continuity confirmed

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

No response to Host Communications

Unit does not respond to host communications requests

Ranked causes

1. PSU Board fault (common)
2. Main Board fault (common)

First check

Check cable continuity

Test point: PSU Board to Host Comms Port cable on rear panel
Expected: Continuity present

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

Pressing rotor switch fails to power on unit but menu selection is possible

Rotor selection works but unit cannot be powered on via rotor; unit appears to have power for other functions

Ranked causes

1. PSU Board fault (probable D3 short circuit) (common)
2. Switch Board failure (occasional)

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

Remote alarm output not operating

Remote alarm output does not activate when alarm condition is triggered

Ranked causes

1. Power supply board or main board fault (common)
2. Remote alarm cable continuity fault (occasional)

First check

Stimulate alarm and verify remote alarm output

Test point: Remote alarm output socket
Expected: Remote alarm output activates when alarm is triggered

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

Rotor skips menus when revolved

Menu selections skip steps when rotor is turned

Ranked causes

1. Rotor failure (common)
2. Switch Board failure (occasional)

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

Rotor switch press fails to power on unit

Pressing rotor switch does not turn unit on, but menu selection is possible

Ranked causes

1. Power supply board fault (common)
2. Switch board fault (occasional)

First check

Test PSU board on/off control

Test point: PSU Board
Expected: PSU board responds to power-on signal

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

Temperature calibration error exceeds compensation (TSH: SE_TACF)

Unit alarms during temperature calibration with error greater than compensation capability

Ranked causes

1. VREFI supply out of specification (common)
2. Main board failure (temperature reference or measurement circuit) (occasional)

First check

Measure VREFI reference supply voltage

Test point: Main Board VREFI output
Expected: VREFI within specification

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

Temperature calibration failed at 54°F point (TSH: HE_54CP)

Unit alarms during temperature calibration with failure at 54°F point

Ranked causes

1. Main board isolated supply voltage out of specification (common)
2. Main board failure (reference or temperature measurement circuit) (occasional)

First check

Measure isolated supply voltages on main board

Test point: Main Board isolated supply outputs (+5VI, +/-15VI, VREFI)
Expected: +5VI, +/-15VI, VREFI within specification

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

Temperature calibration failed at 98°F point (TSH: HE_98CP)

Unit alarms during temperature calibration with failure at 98°F point

Ranked causes

1. Main board isolated supply voltage out of specification (common)
2. Main board failure (reference or temperature measurement circuit) (occasional)

First check

Measure isolated supply voltages on main board

Test point: Main Board isolated supply outputs (+5VI, +/-15VI, VREFI)
Expected: +5VI, +/-15VI, VREFI within specification

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

Unit does not power on from battery or external DC source

Unit completely fails to switch on from either power source

Ranked causes

1. On/Off switch faulty (common)
2. 5V DC supply low (occasional)

First check

Test rotor switch response

Test point: Rotor switch
Expected: Unit powers on when rotor switch pressed

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

Unit does not power on from battery source

Unit fails to switch on when powered by internal or external battery

Ranked causes

1. Battery discharged (common)
2. Power supply board fault (occasional)

First check

Measure battery terminal voltage

Test point: Battery terminals
Expected: Battery voltage within specification

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

Unit will not switch on from battery

Unit does not power on when powered by battery source

Ranked causes

1. Battery discharged (common)
2. Power supply unit board fault (occasional)

First check

Measure battery terminal voltage

Test point: Battery terminals
Expected: Within normal operating range

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

Calibration timestamp recording

Recording the date and time when temperature calibration was completed in the unit's memory.

Ranked causes

1. Timestamp must be recorded after each temperature calibration (common)

First check

Record timestamp after temperature calibration

Test point: TEMP > CAL menu after calibration steps complete
Expected: Current date and time recorded

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

Calibration: NIBP transducers

Verify NIBP pressure transducers (PT1 main, PT2 pneumatic assembly) read correctly; used for checking and recalibrating pressure measurement circuitry

Ranked causes

1. NIBP transducer calibration drift or error (unknown)

First check

Verify NIBP transducer baseline reading with no hose attached

Test point: PT1 (main transducer) and PT2 (pneumatic assembly) displays
Expected: 000 for both systolic and diastolic

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

Calibration: Pop Off (overpressure detection) patient safety

Verify and calibrate the overpressure detection circuitry to ensure proper pop-off response during NIBP measurement cycles

Ranked causes

1. Pop Off calibration drift (unknown)

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

Calibration: Record temperature calibration timestamp

Enter current date and time as the calibration timestamp for temperature sensor calibration record.

Ranked causes

1. Temperature calibration timestamp recording required (common)

First check

Record temperature calibration timestamp

Test point: monitor service menu CAL function
Expected: Current date and time recorded as calibration timestamp

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

More symptoms

Calibration: Temperature sensor and algorithm
NIBP measurement timeout - inflation (N33 error)
NIBP measurement timeout inflation error (N33)
Remote Alarm Output not operating
Unit alarms 'PIC: Incompatible SW Version'
Unit alarms 'TSH: HE_54CP'
Unit alarms 'TSH: HE_98CP'
Unit alarms 'TSH: SE_TACF'

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

Error codes

Code	Meaning	Trigger	Severity
`E00`	Temperature: fail (determination time exceeded)	Removal of probe before temperature determination complete or exceeds 60 sec	error
`E11`	Temperature: fail (tissue contact loss)	Predictive temperature loss of tissue contact > 30 sec	error
`E33`	Temperature: fail	Temperature probe not connected or inoperable	error
`Low Battery`	Low battery condition	Battery voltage drops below threshold	warning
`N00`	NIBP overpressure warning during inflation	Cuff pressure exceeds normal limits during measurement	warning
`N00`	Overpressure detected	System pressure whilst idle 5 or 15 mmHg above ambient for 30 seconds	error
`N00`	NIBP overpressure	Pressure in NIBP system exceeds safe limits or cuff fails to deflate	error
`N12`	NIBP system state error - cuff fails to deflate	Valve control circuitry prevents cuff deflation or system state does not match software expectation	critical
`N12`	System pressure error (idle)	System pressure whilst idle 5 or 15 mmHg above ambient for 30 sec (neonate or adult cuff)	critical
`N12`	Pneumatic system state mismatch with valve control fault preventing deflation	Pressure in system exceeds ambient despite being set open or valve circuit failure detected	critical
`N13`	Pump running continuously or at improper times	Pump remains on when it should be off or runs continuously on power-up	critical
`N13`	Pump status mismatch	Pump on/off status does not concur with Main board software expected status	critical
`N13`	NIBP pump control error - pump does not turn off	Pump runs continuously on power up or remains on when it should be off	critical
`N33`	NIBP timeout - inflation phase	NIBP measurement fails to reach target pressure within timeout period	error
`N33`	NIBP timeout during inflation	Pressure fails to reach target during NIBP inflation within timeout period	error
`N44`	NIBP timeout total time	NIBP measurement exceeds total allowable time limit	warning
`N44`	NIBP timeout - total measurement time	NIBP measurement exceeds total allowable time	warning
`N55`	NIBP timeout - pressure measurement	NIBP pressure measurement fails within timeout period	warning
`N55`	NIBP timeout pressure	Pressure measurement channel fails or cuff deflation takes too long	warning
`N99`	NIBP no determination obtained	NIBP measurement cannot be completed or pulse determination fails	error
`N99`	NIBP failed	Unable to make an NIBP determination	error
`N99`	NIBP no determination	NIBP measurement algorithm unable to determine pressure values	error
`NIBP Range error`	NIBP algorithm value out of range	NIBP algorithm returned value outside specified accuracy range	error
`N, P, E, I, S`	Internal system fault	Other error codes not listed	critical
`P00`	SpO2: no sensor	SpO2 sensor not connected or no sensor code detected	error
`P00`	SpO2 probe disconnected	SpO2 probe signal missing or not detected	warning
`P00`	SpO2 probe disconnected	SpO2 probe not detected or connection lost	error
`P105`	System error - isolated supply or SpO2 comms failure	Power-up sequence detects isolated power supply problem or SpO2 RS232 communications failure	critical
`P105`	System error related to SpO2 isolated power supply	Power-up sequence complete with isolated supply fault	error
`P110`	System error related to SpO2 isolated power supply	Power-up sequence complete with isolated supply fault	error
`P110`	System error - isolated supply or SpO2 comms failure	Power-up sequence detects isolated power supply problem or SpO2 RS232 communications failure	critical
`P115`	System error - isolated supply or SpO2 comms failure	Power-up sequence detects isolated power supply problem or SpO2 RS232 communications failure	critical
`P115`	System error related to SpO2 isolated power supply	Power-up sequence complete with isolated supply fault	error
`P55`	SpO2 no signal	SpO2 measurement signal not detected from probe	warning
`P55`	SpO2 no signal	SpO2 probe connected but no valid signal detected	error
`PIC: +/-12V Out of Spec`	Supply rails +12VR or -12VR operating outside specification	PSU Board PIC software detects voltage deviation during monitoring	error
`PIC: Incompatible SW Version`	PIC software version mismatch between boards detected	Main Board and PSU Board software versions incompatible during initialization	error
`Printer - No Paper`	Printer out of paper	Paper expired or printer door open	warning
`Pump Over Current`	Pump over current condition detected by Main Board processor	Pump current exceeds safe limits or sense circuit failure	error
`TSH: HE_54CP`	Unit failed temperature calibration for 54°F point	Temperature sensor calibration error during startup or maintenance	error
`TSH: HE_54CP`	Temperature calibration failed at 54°F point	During temperature calibration, 54°F reference point measurement fails	error
`TSH: HE_98CP`	Temperature calibration failed at 98°F point	During temperature calibration, 98°F reference point measurement fails	error
`TSH: HE_98CP`	Unit failed temperature calibration for 98°F point	Temperature sensor calibration error during startup or maintenance	error
`TSH: SE_TACF`	Temperature calibration error exceeding compensation capability	Temperature error greater than compensatable range detected	error
`TSH: SE_TACF`	Temperature calibration error exceeds compensation range	Temperature calibration detects error greater than circuit can compensate	critical

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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.