FR FieldReady Academy
Anesthesia machines

Mindray AS3000: troubleshooting and error codes

The ServiceForge knowledge base holds 77 documented symptoms for the Mindray AS3000, with 148 ranked causes, 60 diagnostic checks with test points and expected values, and 2 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

In compliance test, compliance test failed

Detected during startup test when compliance test fails

Ranked causes

  1. 1. The Y-fitting is not sealed or the Breathing System has leakage (common)
  2. 2. The respiration tubes are too long (occasional)
  3. 3. Calibration of the pressure sensor is inaccurate (occasional)
  4. 4. The flow meter is set incorrectly (occasional)
  5. 5. The calibration of the flow meter is inaccurate (occasional)

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

Software version incompatibility at startup

System displays 'Software Version ... FAIL' message during startup test

Ranked causes

  1. 1. GUI, BDU and keyboard software versions incompatible (common)
  2. 2. Power supply cycled too quickly (common)
  3. 3. Data wire disconnected or damaged (occasional)
  4. 4. BDU control board defective (occasional)
  5. 5. Keyboard board defective (occasional)
First check

Verify power cycle timing

Test point
Power switch
Expected
OFF state held for 1-2 seconds before ON

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

The display screen is a solid color

Display shows only one color with no image during startup or runtime

Ranked causes

  1. 1. The GUI program has crashed (common)
  2. 2. The signal cable is disconnected (common)
  3. 3. PC104 is defective (occasional)
  4. 4. The communication board or power supply for the light is defective (occasional)
  5. 5. The display screen is damaged (rare)

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

In leakage detection, leakage volume 501–999 mL

Moderate leakage detected during startup test between 501–999 mL

Ranked causes

  1. 1. The tubing connection is not tight (common)
  2. 2. Incorrect installation of the absorber canister (common)
  3. 3. The pressure gauge or oxygen sensor on the circuit is not installed tightly (common)
  4. 4. There is a leakage in the fresh gas supply (occasional)

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

In leakage detection, leakage volume larger than 1 L

Large leakage detected during startup test exceeding 1 L

Ranked causes

  1. 1. The tubing connection is not tight (common)
  2. 2. Incorrect installation of the absorber canister (common)
  3. 3. The pressure gauge or oxygen sensor on the circuit is not installed tightly (common)
  4. 4. There is a leakage in the fresh gas supply (occasional)

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

O2 sensor failure at startup

System displays 'O2 Sensor ... FAIL' message during startup test

Ranked causes

  1. 1. O2 concentration below 16% (common)
  2. 2. Oxygen sensor out of range (common)
  3. 3. Main unit-oxygen sensor cable disconnected or damaged (occasional)
  4. 4. Amplifier board defective (occasional)

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

The tidal volume reading is out of tolerance patient safety

Tidal volume measurement outside acceptable range during runtime

Ranked causes

  1. 1. The compliance test after startup is inaccurate (common)
  2. 2. Calibration of the flow sensor is inaccurate (common)
  3. 3. Calibration of the inspiration valve is inaccurate (common)
  4. 4. Calibration of the pressure sensor is inaccurate (common)

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

Alarm speaker failure at startup

System displays 'Alarm Speaker ... FAIL' message during startup test

Ranked causes

  1. 1. Connection wire to speaker disconnected or damaged (common)
  2. 2. Speaker damaged (occasional)
  3. 3. Keyboard board defective (occasional)

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

APL valve detection pressure out of specification during leak test caution

Pressure gauge shows APL valve detection pressure outside 28-32 cmH2O range during startup leak test

Ranked causes

  1. 1. Breathing system pneumatic hose leaks gas in manual mode (common)
  2. 2. Pressure gauge failure (occasional)
  3. 3. APL valve out of specification (occasional)
First check

Verify APL valve pressure during leak test

Test point
Pressure gauge reading
Expected
28 - 32 cmH2O, 28 to 32

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

BDU communication failure at startup

System displays 'BDU Communication ... FAIL' message during startup test

Ranked causes

  1. 1. Power supply cycled too quickly (common)
  2. 2. Data wire disconnected or damaged (common)
  3. 3. BDU control board defective (occasional)
First check

Verify power cycle timing

Test point
Power switch
Expected
OFF state held for 1-2 seconds before ON

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

Calibration: Oxygen Sensor

Oxygen sensor requires calibration at 21% and 100% oxygen concentration to ensure accurate oxygen reading measurement in the breathing system.

Ranked causes

  1. 1. Oxygen sensor calibration required for accurate readings (common)
  2. 2. 100% Oxygen concentration calibration (common)
  3. 3. Temperature conditioning for accurate readings (common)
First check

Breathing system warm-up

Test point
breathing system
Expected
thermal equilibrium reached
Tools
timer

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

Charging state always displayed at runtime

System continuously displays charging state indicator during operation

Ranked causes

  1. 1. Battery capacity is low (common)
  2. 2. Connection wire to battery disconnected or damaged (occasional)
  3. 3. Battery defective (occasional)

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

Continuous Pressure patient safety

Airway pressure remains elevated continuously during runtime

Ranked causes

  1. 1. Airway pressure is too high (common)
  2. 2. The expiration valve (PEEP) is defective (occasional)
  3. 3. The airway is occluded (occasional)

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

Heating of circuit is non functional caution

Circuit heating does not warm patient breathing circuit during runtime

Ranked causes

  1. 1. Line power is not connected (common)
  2. 2. The circuit cable is defective (occasional)
  3. 3. Heating control board is defective (occasional)

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

Inspiration sensor failure at startup

System displays 'Inspiration Sensor ... FAIL' message during startup test or after restarting

Ranked causes

  1. 1. Fresh gas flowing during startup procedure (common)
  2. 2. Tubing kinked or occluded (common)
  3. 3. Sensor board defective (occasional)

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

Inspiration valve failure at startup caution

System displays 'Inspiration Valve ... FAIL' message during startup test

Ranked causes

  1. 1. Inspiration valve connection wire disconnected or damaged (common)
  2. 2. Inspiration valve defective (common)
  3. 3. Amplifier board defective (occasional)

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

Low battery at runtime

System displays 'Low Battery' message during operation

Ranked causes

  1. 1. Battery capacity is low (common)
  2. 2. Battery defective (occasional)
  3. 3. Connection wire or power board defective (occasional)

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

O2 supply failure at startup or runtime patient safety

System displays 'O2 Supply ... FAIL' message during startup or while running

Ranked causes

  1. 1. Gas source not connected (common)
  2. 2. Gas supply pressure switch or cable damaged (common)
  3. 3. Amplifier board defective (occasional)

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

PEEP valve failure at startup caution

System displays 'PEEP Valve ... FAIL' message during startup test

Ranked causes

  1. 1. PEEP valve connection wire disconnected or damaged (common)
  2. 2. PEEP valve defective (common)
  3. 3. Amplifier board defective (occasional)

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

Pressure sensor failure at startup

System displays 'Pressure Sensor ... FAIL' message during startup test

Ranked causes

  1. 1. PAW board connection wire disconnected or damaged (common)
  2. 2. PAW board or sensor board connection defective (common)
  3. 3. Tubing kinked or occluded (common)

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

The flow meter light is non operational

Flow meter illumination not working

Ranked causes

  1. 1. The power supply to the light is defective (common)
  2. 2. The foil of light is defective (occasional)
  3. 3. The inverter is defective (occasional)

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

Vent/manual valve failure at startup caution

System displays 'Vent/Manual Valve Failure' message during startup test

Ranked causes

  1. 1. Wire connecting vent/manual valve disconnected or damaged (common)
  2. 2. Vent/manual solenoid valve damaged (common)
  3. 3. Amplifier board or connection cable defective (occasional)

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

AC power failure at startup or runtime

System displays 'AC Power Failure' message during startup or while running

Ranked causes

  1. 1. AC power not connected (common)
  2. 2. Fuse tripped (common)

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

All or some keys are non responsive

Keyboard input not registering for one or more keys

Ranked causes

  1. 1. The keyboard is defective (common)
  2. 2. The communication board is defective (occasional)

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

All or some of the work lights are defective

One or more work lights not illuminating

Ranked causes

  1. 1. The work light circuit board is defective (common)
  2. 2. The cable is defective (occasional)

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

BDU Communication Failure patient safety

Communication between main unit and bellows display unit fails during startup or runtime

Ranked causes

  1. 1. The communication cable is disconnected (common)
  2. 2. The BDU software has crashed or reset (occasional)

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

BDU EEPROM data checksum failure at startup

System displays 'BDU EEPROM Data ... FAIL' message during startup test

Ranked causes

  1. 1. Data stored in EEPROM lost or corrupted (common)
  2. 2. BDU board defective (occasional)

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

Calibration: Flow Sensor

Flow sensor calibration establishes accuracy for airflow measurements at multiple calibration points using a Vent Tester and Flow Analyzer.

Ranked causes

  1. 1. Flow sensor calibration required for airflow accuracy (common)
  2. 2. Flow calibration at multiple set points (common)
First check

Remove Inspiratory and Expiratory valve disks

Test point
breathing circuit
Expected
valve disks removed, valve covers reinstalled

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

Expiration sensor failure at startup

System displays 'Expiration Sensor Failure' message during startup test

Ranked causes

  1. 1. Fresh gas flow present at startup (common)
  2. 2. Sensor board defective (occasional)

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

High FiO2 patient safety

Oxygen concentration exceeds upper alarm limit during runtime

Ranked causes

  1. 1. Oxygen concentration is higher than the upper limit set for the Oxygen Concentration alarm (common)
  2. 2. Oxygen calibration is inaccurate (occasional)

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

High PEEP patient safety

PEEP pressure exceeds normal range during runtime

Ranked causes

  1. 1. The expiration time is too short or expiration limb is occluded (common)
  2. 2. The expiration valve (PEEP) is defective (occasional)

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

In leakage detection, safety valve detection failed

Detected during startup test when safety valve detection fails

Ranked causes

  1. 1. The proportional valve on the airway module failed (unknown)
  2. 2. The safety valve in the airway module failed (unknown)

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

Keyboard communication Failure

Signal communication with keyboard fails during startup or runtime

Ranked causes

  1. 1. The signal wire is disconnected or damaged (common)
  2. 2. The keyboard board program crashed (occasional)

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

Keyboard communication failure at startup

System displays 'Keyboard Communication ... FAIL' message during startup test

Ranked causes

  1. 1. Data wire disconnected or damaged (common)
  2. 2. Keyboard board defective (occasional)

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

Low FiO2 patient safety

Oxygen concentration falls below lower alarm limit during runtime

Ranked causes

  1. 1. Oxygen concentration is lower than the lower limit set for Oxygen Concentration alarm (common)
  2. 2. Oxygen calibration is inaccurate (occasional)

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

Power supply switch on main unit is defective

Power switch fails to function

Ranked causes

  1. 1. The power supply switch on the main unit or the cable connection failed (common)
  2. 2. Communication board is defective (occasional)

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

The display screen has a hotspot or uneven brightness

Display shows uneven illumination or bright spots

Ranked causes

  1. 1. The display screen is defective (common)
  2. 2. PC104 is defective (occasional)

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

The encoder is non responsive

Encoder dial or control not responding to input

Ranked causes

  1. 1. The encoder failed (common)
  2. 2. The communication board is defective (occasional)

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

The PEEP reading is out of tolerance patient safety

Positive end-expiratory pressure reading outside acceptable range during runtime

Ranked causes

  1. 1. Calibration of expiration valve (PEEP) is inaccurate (common)
  2. 2. Calibration of pressure sensor is inaccurate (common)

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

Absorber guide rods height verification

Measurement and verification of absorber guide rod height during reassembly after maintenance

Ranked causes

  1. 1. Improper rod height after disassembly and reassembly (occasional)
First check

Measure absorber guide rod height

Test point
Absorber Guide Rods
Expected
Old style (0997-00-0618): 314 mm; New style (115-005967-00): 303 mm, +/- 0.5 mm (old) or +/- 0.25 mm (new)
Tools
Tape measure (metric)

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

Absorber mount assembly plate alignment verification

Measurement of distance between absorber mount assembly plate at four points to verify proper alignment

Ranked causes

  1. 1. Misalignment of absorber mount assembly after reassembly (occasional)
First check

Measure absorber mount assembly plate alignment at four points

Test point
Absorber Mount Assembly Plate
Expected
Difference in length not more than 1 mm across all four measurement points, Maximum 1 mm variation
Tools
Tape measure (metric)

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

AC Outlets are non functional high voltage

AC power outlets not supplying power

Ranked causes

  1. 1. A fuse is tripped (common)

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

AC Power Failure high voltage

AC mains power not available or non-functional

Ranked causes

  1. 1. AC power is not connected or a fuse is tripped (common)

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

AD/DA converter failure at startup

System displays 'AD/DA ... FAIL' message during startup test

Ranked causes

  1. 1. AD or 4052 converter in digital signal processor damaged (rare)

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

APNEA patient safety

Breathing hoses disconnected, no breath detected during runtime

Ranked causes

  1. 1. Breathing hoses are disconnected (common)

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

APNEA Backup

Apnea backup ventilation initiated when PS mode not triggered during runtime

Ranked causes

  1. 1. PS mode is not triggered and APNEA backup ventilation is given according to the minimum breathing frequency that has been set (common)

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

Automatic Ventilation not available patient safety

Automatic ventilation mode disabled during startup or runtime, only Standby/Manual mode available

Ranked causes

  1. 1. A failure has been found (Displayed on the screen); the AS3000 can work only in Standby/Manual mode (common)

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

Bellows deflated at bottom during runtime patient safety

Bellows completely deflated and non-responsive after startup and leak test during runtime

Ranked causes

  1. 1. This is caused by a disconnected breathing circuit, a removed absorber canister, a removed O2 sensor or sensor adapter, check valve dome rings, or no fresh gas flow while ventilator is running (common)

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

Bellows movement during startup leak test caution

Bellows moves during startup leak test when it should remain stationary

Ranked causes

  1. 1. Solenoid failure or wiring error (common)

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

Calibration: Flow Meter

Flow Meter calibration establishes accuracy for flow measurements at multiple calibration points using a Flow Analyzer connected to Common Gas Outlet.

Ranked causes

  1. 1. Flow Meter calibration required for accurate flow delivery (common)
First check

Connect Respiration Tube to Common Gas Outlet and Flow Analyzer

Test point
Common Gas Outlet, Flow Analyzer inlet
Expected
Respiration Tube connected
Tools
Respiration Tube, Flow Analyzer (Certifier-FA PLUS)

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

Calibration: Flow Valve

Flow valve calibration measures and adjusts flow valve operation with a breathing circuit, 3L bag, and onscreen guidance.

Ranked causes

  1. 1. Flow valve calibration required for accurate flow control (common)
First check

Reinstall Inspiratory and Expiratory valve disks

Test point
breathing circuit
Expected
valve disks reinstalled

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

Calibration: O2 sensor 100% level

O2 sensor calibration to 100% reference gas level after initial installation or sensor replacement

Ranked causes

  1. 1. Initial installation or O2 sensor replacement requiring 100% calibration (common)
First check

Calibrate O2 sensor to 100% level

Test point
O2 sensor interface
Expected
Sensor reading matches 100% oxygen reference

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

Calibration: O2 sensor 21% level

O2 sensor calibration to 21% reference gas level as required by maintenance schedule

Ranked causes

  1. 1. Initial installation or O2 sensor replacement requiring calibration (common)
First check

Calibrate O2 sensor to 21% level

Test point
O2 sensor interface
Expected
Sensor reading matches 21% reference

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

Calibration: Paw Sensor 0 cmH2O

Paw sensor must be calibrated at 0 cmH2O after removing the 3L bag and setting APL Valve to 0 cmH2O.

Ranked causes

  1. 1. Paw sensor 0 cmH2O reference calibration (common)
First check

Remove 3L bag from breathing circuit

Test point
Y-fitting
Expected
3L bag removed

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

Calibration: Paw Sensor 30 cmH2O

Paw sensor must be calibrated at 30 cmH2O using a Pressure Meter connected to the Test Port with O2 Flush and Flow Meter maintaining pressure.

Ranked causes

  1. 1. Paw sensor 30 cmH2O reference calibration (common)
First check

Set APL Valve to 30 cmH2O

Test point
APL Valve
Expected
30 cmH2O

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

Calibration: PEEP Valve

PEEP valve calibration using Adult Test Lung connected to Y-fitting with Fresh Gas flow at 0 mL/min and bellows filled via O2 Flush.

Ranked causes

  1. 1. PEEP valve calibration required for pressure relief accuracy (common)
First check

Disconnect plastic flaps from Adult Test Lung

Test point
Adult Test Lung
Expected
plastic flaps disconnected
Tools
Adult Test Lung P/N 0138-00-0012

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

Calibration: Proportional Valve Regulator

Proportional valve regulator pressure must be set between 25.1 and 25.7 psi to ensure correct system pressure for proportional valve operation.

Ranked causes

  1. 1. Proportional valve regulator pressure adjustment required (common)
First check

Open gas cover panel

Test point
AS3000 external
Expected
gas cover panel opened

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

Check valve sticky from moisture contact patient safety

Breathing system check valve becomes sticky due to constant contact with moist patient gas, affecting valve operation

Ranked causes

  1. 1. Moisture accumulation on check valve from patient gas contact (common)
First check

Verify breathing system check valve operation after cleaning

Test point
Bellows check valve assembly
Expected
Valve moves smoothly without sticking

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

Displayed parameter values are for the pending mode

Display shows parameters for pending mode instead of current operating mode during runtime

Ranked causes

  1. 1. The AS3000 is in the pre-selection mode, but it is still working according to the original operating mode (common)

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

EEPROM IC failure at startup

System displays 'EEPROM IC ... FAIL' message during startup test

Ranked causes

  1. 1. BDU control board or EEPROM chip damaged (occasional)

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

More symptoms

  • High Airway Pressure
  • High Minute Volume
  • Low Airway Pressure
  • Low Battery
  • Low Minute Volume
  • Negative Pressure
  • O2 Cal Due
  • O2 Sensor failure
  • O2 Supply failure
  • Pressure, Volume and Apnea Alarms are OFF
  • Software mismatch at startup
  • The O2 reading is out of tolerance
  • The pressure reading is out of tolerance
  • The switch on the work light is defective
  • Tidal volume displayed is smaller than bellows value
  • Ventilator setting is not possible
  • Watch Dog Timer failure at startup

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

Error codes

CodeMeaningTriggerSeverity
NON-FUNCTIONAL Call Service RepresentativeA failure has been found (Displayed on the screen), which leads to the abnormal operation of anesthesia machineFailure detected during startup testcritical
System Self TestSelf-test during each startupEach system startupinfo

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.