Infusion pumps · Accutorr family

Mindray Accutorr Plus: troubleshooting and error codes

The ServiceForge knowledge base holds 52 documented symptoms for the Mindray Accutorr Plus, with 69 ranked causes, 115 diagnostic checks with test points and expected values, and 30 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

No measurement or inaccurate temperature readings patient safety

AccuTemp fails to display temperature reading or reading is inconsistent with expected value for patient condition.

Ranked causes

1. Technique error - button not held throughout measurement (common)
2. Technique error - not scanning side-to-side (common)
3. Technique error - twisting or rotating probe (common)
4. Technique error - optical film cover not changed (common)
5. Debris or contamination on lens (occasional)
6. Ear canal opening not fully covered by probe (occasional)
7. Visible wax plug or dense hair blocking view (occasional)
8. Low battery voltage (occasional)

First check

Verify button is pressed throughout measurement

Test point: Start button on AccuTemp
Expected: Button held continuously from initiation until temperature displays

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

AccuTemp no measurement or inaccurate reading

AccuTemp fails to display measurement or readings are inaccurate; may be caused by technique error or equipment malfunction.

Ranked causes

1. Technique error - improper button or probe handling (common)
2. Debris or obstruction on lens or in ear canal (common)
3. Low battery voltage (occasional)

First check

Verify proper measurement technique

Test point: Operator procedure
Expected: Button held throughout measurement; probe scanned side-to-side; new optical film cover used

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

Battery operation abnormal

Battery operation LED is not steady on or is flashing, indicating near depletion or no battery operation.

Ranked causes

1. Battery depleted or disconnected (common)
2. Power supply/charger malfunction (occasional)

First check

Check battery operation LED status

Test point: Battery operation LED
Expected: Steady ON

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

Calibration: Low battery indicator voltage high voltage

Determine threshold voltage where battery LED begins to flash during voltage decrease

Ranked causes

1. Test low battery indicator threshold (unknown)
2. Decrease voltage and observe indicator (unknown)

First check

Monitor ON and initialize

Test point: Monitor display
Expected: Self-check completes successfully

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

Cuff over-inflation patient safety

NIBP cuff inflates beyond safe pressure limit for patient size

Ranked causes

1. Inadequate over-pressure transducer control (occasional)
2. Pump speed not reduced for neonatal cuff (occasional)

First check

Monitor cuff pressure during inflation

Test point: DC pressure channel (A/D channel 1)
Expected: Reaches target pressure without exceeding over-pressure limit for selected patient size

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

Multiple temperature readings inconsistent

Taking repetitive measurements in the same location results in lower readings; temperature varies between measurements.

Ranked causes

1. Probe cooling effect from repeated measurements (common)
2. Patient lying on measured ear (occasional)

First check

Verify wait time between successive measurements

Test point: Time elapsed between measurements
Expected: At least a few minutes between measurements in same location

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

Pulsatile signal not detected patient safety

NIBP system fails to acquire pulse channel signal during cuff inflation

Ranked causes

1. Pulse channel filter malfunction or misconfiguration (rare)
2. Weak pulse amplitude for patient size (occasional)

First check

Measure AC pressure (pulse) channel

Test point: A/D channel 2 (AC pressure/pulse)
Expected: Detectable oscillations during cuff deflation above systolic pressure Hz

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

Temperature readings not displayed patient safety

Optional temperature module readings not appearing in temperature display window.

Ranked causes

1. Temperature probe failure (common)
2. Temperature module failure (occasional)

First check

Obtain one or more temperature readings

Test point: Temperature display window
Expected: Readings displayed

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

Various temperature readings between opposite ears

Temperature measurements differ significantly between left and right ears when taken sequentially.

Ranked causes

1. Patient lying on one ear (common)
2. Ear covered (hat, blanket, bandage, telephone) (occasional)

First check

Verify patient position and ear coverage

Test point: Both ears visually
Expected: Both ears uncovered, patient not lying on either ear

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

Various temperature readings from same location

Quick repetitive measurements in same ear or axilla yield inconsistent results, temperature decreases with repeated measurements.

Ranked causes

1. Probe thermally cools measured area (common)
2. Dirty or wet lens (occasional)

First check

Verify measurement interval in same location

Test point: Same ear or axilla
Expected: Temperature stable after several minutes rest

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

AccuTemp critical low battery error

AccuTemp double beeps and displays '——' while holding Start button, then powers down; battery voltage below 5.7 VDC.

Ranked causes

1. Battery voltage critically low (common)

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

AccuTemp displays E-00 or E-01 error code

AccuTemp shows error code E-00 or E-01 on display while holding Start button.

Ranked causes

1. Internal AccuTemp fault (unknown)

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

AccuTemp double beeps and displays "--" then powers down

Device sounds double beep, displays two dashes on screen, and automatically shuts off during measurement attempt.

Ranked causes

1. Battery voltage critically low (common)

First check

Measure battery voltage

Test point: 9V battery terminals
Expected: ≥5.7 VDC, ≥5.7

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

AccuTemp double beeps while holding Start button

Device sounds double beep during measurement attempt, but continues operation and displays reading.

Ranked causes

1. Low battery condition (common)

First check

Measure battery voltage

Test point: 9V battery terminals
Expected: 6.2 to 5.7 VDC, 6.2-5.7

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

AccuTemp error E-O0 or E-o1

AccuTemp displays 'E-O0' or 'E-o1' while holding Start button; internal malfunction.

Ranked causes

1. Internal AccuTemp malfunction (rare)

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

AccuTemp low battery condition

AccuTemp double beeps while holding Start button; battery voltage between 6.2 and 5.7 VDC.

Ranked causes

1. Battery voltage low but not critically depleted (common)

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

Battery operation LED not on or flashing

Battery operation LED is not steadily illuminated or is flashing, indicating near depleted or failed battery

Ranked causes

1. Battery depleted or power supply/charger failure (common)

First check

Check battery operation LED status

Test point: Battery operation LED on front panel
Expected: Steady ON indicates battery operation; flashing indicates near depleted battery

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

Calibration: Battery test setup high voltage

Verify normal power-up sequence and battery indicator function using external power supply

Ranked causes

1. Initial setup for battery testing (unknown)

First check

Power up UUT with external supply

Test point: Keypad battery indicator
Expected: Normal power-up sequence occurs and battery symbol indicator is lit

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

Calibration: Infrared thermometer temperature verification

Verify infrared thermometer temperature accuracy using preheated water bath, Black Body device, and laboratory-grade reference thermometer

Ranked causes

1. Periodic verification of infrared thermometer accuracy required (unknown)

First check

Pre-heat water bath to target temperature

Test point: Water bath
Expected: 100°F

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

Calibration: Low battery cut-off voltage high voltage

Determine voltage threshold at which monitor powers off due to low battery

Ranked causes

1. Test low battery cut-off threshold (unknown)

First check

Monitor power-off point for SLA battery

Test point: Monitor power state
Expected: 9.8 to 10.7 VDC, to 10.7 VDC

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

Calibration: Main pressure transducer

Main pressure transducer reading disagrees with external reference gauge; MAP display does not match simulator manometer reading at 158 mmHg

Ranked causes

1. Main pressure transducer out of calibration (unknown)

First check

Connect Cufflink simulator and 700 cc test chamber

Test point: Accutorr Plus cuff connector, simulator open port
Expected: Equipment connected and manometer function selected

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

Calibration: Main Pressure Transducer Verification Test

Verify main pressure transducer calibration in LOW, MED, and HIGH modes by comparing readings to external gauge

Ranked causes

1. Main pressure transducer out of calibration (unknown)

First check

Select LOW mode calibration test

Test point: Room 11, Bed a
Expected: Pressure settles below 100 mmHg after 10 seconds

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

Calibration: Over-pressure transducer

Over-pressure transducer reading does not display 158 mmHg during Low pressure mode verification test

Ranked causes

1. Over-pressure transducer out of calibration (unknown)

First check

Adjust potentiometer to set MAP readout

Test point: R4 on 0670-00-0584-01 PCB or R504 on 0670-00-1143 PCB
Expected: 158 mmHg

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

Calibration: Predictive Thermometer

Verify and adjust predictive thermometer (PTM) to factory specifications using water bath method or system calibration procedure. For infrared thermometer, perform temperature verification test with black body device.

Ranked causes

1. Thermometer readings out of specification (unknown)

First check

Prepare water bath at specified temperature

Test point: Water bath thermometer
Expected: 89.6 to 110.0°F
Tools: Laboratory grade stirred water bath, precision thermometer

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

Calibration: Predictive thermometer system

Adjust output voltage and temperature readings to factory specifications using resistor decade box, DVM, and adjustable potentiometers R1 and R2

Ranked causes

1. Initial calibration or recalibration required (unknown)

First check

Connect power source

Test point: Thermometer input
Expected: 9.1 V DC, ±0.2V nominal

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

Calibration: Predictive thermometer system calibration

Two-point calibration procedure for temperature measurement module using resistor decade box and voltage adjustment

Ranked causes

1. Temperature module requires periodic two-point calibration at reference resistance points (common)

First check

Connect power supply to predictive thermometer

Test point: Thermometer power input
Expected: 9V battery (if module has one) or external 9.1V supply connected
Tools: 9V battery or adjustable external supply

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

Calibration: Predictive thermometer verification

Infrared thermometer probe verification against water bath black body device with ambient and target temperature recording

Ranked causes

1. Thermometer requires periodic verification against known temperature reference (common)

First check

Pre-heat water bath to target temperature

Test point: Water bath
Expected: 100°F
Tools: Heat source, thermometer

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

Calibration: Set current time

Adjust real-time clock to correct date and time using TIMER/TEMP and arrow keys

Ranked causes

1. RTC reset during battery test (common)

First check

Hour display active

Test point: Monitor display
Expected: Hour digit only displayed after TIMER/TEMP held 6 seconds

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

Calibration: Water Bath Method correction factors

Apply correction factors to thermometer readings based on temperature range to obtain calibrated measurements. Use Table 5-10 values.

Ranked causes

1. Reading correction required per specification (common)

First check

Identify Celsius readout range and apply correction

Test point: Thermometer display (Celsius)
Expected: 32.0–41.0°C: subtract 0.6; 41.0–43.0°C: subtract 0.5
Tools: Calculator, Table 5-10

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

Disconnected cuff not detected patient safety

NIBP system does not detect disconnected or kinked cuff hoses during measurement cycle

Ranked causes

1. Cuff disconnection or kink in hose (common)

First check

Verify cuff connection

Test point: Cuff connector
Expected: Firmly seated, no kinks in hose

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

Green LED not illuminated when AC power available

AC power is connected but green LED adjacent to front panel ON/OFF keys does not illuminate

Ranked causes

1. Power supply malfunction (common)

First check

Verify AC power is available and green LED status

Test point: Green LED adjacent to front panel ON/OFF keys
Expected: Green LED is illuminated

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

Inaccurate or inconsistent infrared temperature readings patient safety

Infrared AccuTemp thermometer showing unreliable or variable measurements in same location.

Ranked causes

1. Probe cooler than measurement site, heat transfer occurs (common)

First check

Wait 3-5 minutes between consecutive measurements in same ear

Test point: Measurement site
Expected: Consistent readings after recovery period

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

Incorrect battery charge profile selected

Installed battery charge profile does not match battery type loaded in unit

Ranked causes

1. Operator configuration error (common)

First check

Verify battery charge profile matches installed battery

Test point: Battery type and charge profile setting
Expected: Proper battery charge profile selected for installed battery

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

Incorrect patient size or cuff mismatch patient safety

Wrong patient size selected (Adult, Neonate, Pediatric) or NIBP cuff does not match selected size

Ranked causes

1. Operator configuration error (common)

First check

Verify patient size selection and cuff match

Test point: Front panel patient size setting and installed NIBP cuff
Expected: Correct patient size selected (Adult, Neonate, or Pediatric) with matching NIBP cuff

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

NIBP and/or SpO2 detection and display not working patient safety

NIBP measurements or SpO2 readings not displaying or functioning correctly.

Ranked causes

1. Failed Diagnostics Test 01-12 (unknown)

First check

Obtain minimum five NIBP measurements

Test point: NIBP monitor
Expected: Valid measurements displayed

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

NIBP hardware overpressure error 987 caution

Error code 987 displayed; excessive cuff pressure detected by hardware over-pressure sensor; triple beep tone generated.

Ranked causes

1. Hardware overpressure sensor activation (unknown)

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

NIBP measurement cuff overpressure error 8812 caution

Error code 8812 displayed on front panel; excessive cuff pressure detected; unit generates triple beep tone.

Ranked causes

1. Overpressure circuit not programmed for current patient size (common)

First check

Verify patient size selection matches overpressure circuit setting

Test point: System configuration
Expected: Overpressure circuit programmed for selected patient size

NIBP measurement retry error 8810

Error code 8810 displayed on front panel LED; unit generates triple beep tone and cannot complete NIBP measurement.

Ranked causes

1. Motion artifact or weak pulsations (common)

First check

Verify patient size selection and cuff size match

Test point: System settings and attached cuff
Expected: Correct patient size selected; appropriate cuff attached

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

Service Diagnostics: Software version verification

Technician enters Service Diagnostics mode to verify installed software versions; initial power-up sequence displays Room LED '0', Bed LED 'a', Systolic LED 'ddd'

Ranked causes

1. Need to verify software configuration (common)

First check

Verify initial power-up display values

Test point: LED readouts
Expected: Room LED='0', Bed LED='a', Systolic LED='ddd'

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

SpO2 failure error 996

Error code 996 displayed on front panel; SpO2 module failed self-test.

Ranked causes

1. SpO2 module internal failure (rare)

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

SpO2 no sensor error 8850

Error code 8850 displayed on front panel; no SpO2 sensor is connected to the unit.

Ranked causes

1. SpO2 sensor not connected (common)

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

SpO2 sensor not connected or incorrect sensor type/size patient safety

SpO2 section equipped but no sensor connected or sensor type/size does not match unit requirements

Ranked causes

1. Missing or mismatched SpO2 sensor (common)

First check

Verify SpO2 sensor connection and type/size if equipped

Test point: SpO2 sensor connector and sensor specifications
Expected: SpO2 sensor connected with proper type/size for unit

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

SpO2 sensor off patient error 8851 patient safety

Error code 8851 displayed on front panel; sensor is not on patient (Masimo® SpO2 only).

Ranked causes

1. Sensor disconnected or removed from patient (common)

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

SpO2 uncalibrated error 995

Error code 995 displayed on front panel; SpO2 module fails calibration check.

Ranked causes

1. SpO2 calibration check failed (rare)

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

Temperature module battery low error 8832

Error code 8832 displayed on front panel; 9V battery in temperature module requires replacement.

Ranked causes

1. 9V battery depleted in temperature module (common)

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

Temperature module calibration required error 988

Error code 988 displayed on front panel; thermometer needs calibration.

Ranked causes

1. Temperature module out of calibration (occasional)

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

Temperature module internal failure error 991

Error code 991 displayed on front panel; thermometer module internal failure detected.

Ranked causes

1. Temperature module internal component failure (rare)

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

Temperature module switch error 990

Error code 990 displayed on front panel; thermometer switch is set incorrectly.

Ranked causes

1. Thermometer mode switch set to incorrect position (common)

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

Temperature probe defective error 8831

Error code 8831 displayed on front panel; probe is defective or connection is faulty.

Ranked causes

1. Defective temperature probe or faulty connection (occasional)

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

Temperature probe error 8830

Error code 8830 displayed on front panel; tissue contact may have been lost during temperature measurement.

Ranked causes

1. Probe lost contact with patient tissue (common)

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

Unit does not power on

Monitor will not turn on or respond to power button.

Ranked causes

1. Power supply output voltages out of specification (common)

First check

Measure 5V power supply output

Test point: Main power supply output
Expected: 4.9 - 5.1 V, 4.9 - 5.1

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

Unit will not power on

Green LED adjacent to front panel ON/OFF keys is not illuminated when AC power is available.

Ranked causes

1. Power supply malfunction (common)

First check

Check green LED adjacent to front panel ON/OFF keys

Test point: Front panel LED
Expected: Illuminated

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

Error codes

Code	Meaning	Trigger	Severity
`8810`	NIBP Retry - Unable to Measure	Motion artifact, cycle time-out, weak pulsations, or no pulsations detected	warning
`8811`	NIBP Retry - Pump Higher	Insufficient cuff pressure during measurement attempt	warning
`8812`	NIBP Stop - Cuff Overpressure	Software detects excessive cuff pressure during measurement	error
`8813`	NIBP Stop - Unable to Measure	Four successive NIBP measurement attempts fail	error
`8830`	Temperature Probe Check Required	Temperature probe detected loss of tissue contact during measurement	warning
`8830`	Check Probe (TEMP)	Temperature probe connection or contact lost	warning
`8831`	Temperature Probe Replace	Defective probe detected or connection failure	error
`8832`	Temperature Module Battery Low	Battery voltage in temperature module falls below operating threshold	warning
`8832`	Battery Low (TEMP)	9V temperature probe battery depleted	warning
`8850`	SpO2 No Sensor	SpO2 module unable to detect connected sensor at startup	warning
`8851`	SpO2 Sensor Off Patient (Masimo only)	SpO2 sensor loses contact with patient or is removed during measurement	warning
`8851`	Sensor Off	SpO2 sensor not on patient	warning
`8852`	SpO2 Interference	Signal interference detected on SpO2 sensor line (Masimo only)	warning
`8853`	SpO2 Pulse Search	SpO2 module cannot locate acceptable signal	warning
`8854`	SpO2 Weak Pulse	SpO2 sensor detects weak arterial pulsations (Masimo only)	warning
`8856`	SpO2 Check Sensor	SpO2 sensor malfunction detected during operation (Masimo only)	error
`8857`	SpO2 Pulse Rate Below Threshold	Measured pulse rate falls below minimum threshold	info
`8857`	PR<21 or PR<26	Pulse rate below threshold	warning
`8858`	SpO2 Pulse Rate Above Threshold	Measured pulse rate exceeds maximum threshold	info
`8858`	PR>249 or PR>239	Pulse rate above threshold	warning
`984`	NIBP Hardware Failure	NIBP A/D conversion circuit malfunction detected	critical
`985`	NIBP Overpressure Circuit Not Programmed	Overpressure circuit not configured for current patient size	critical
`986`	NIBP Overpressure Circuit Not Tracking	Two pressure transducers not tracking each other during measurement	critical
`987`	Stop - Hardware Overpressure	Excessive cuff pressure detected by hardware over-pressure sensor	critical
`988`	Temperature Module Bad Calibration	Temperature module calibration check fails at startup or during operation	error
`990`	Temperature Module Illegal Mode	Temperature module mode switch set to incorrect position	error
`991`	Temperature Module Failed	Internal temperature module malfunction detected	critical
`995`	SpO2 Uncalibrated	SpO2 module fails calibration check at startup	error
`996`	SpO2 Failure	SpO2 module fails self-test at startup or during operation	critical
`E-00 or E-01`	Internal AccuTemp error code	Displayed when Start button is held during measurement	error

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.