Ventilators · VIP family

Bird VIP Gold: troubleshooting and error codes

The ServiceForge knowledge base holds 86 documented symptoms for the Bird VIP Gold, with 117 ranked causes, 221 diagnostic checks with test points and expected values, and 14 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

High Pressure alarm not accurate patient safety

High Pressure alarm does not appear to be accurate

Ranked causes

1. Pressure relief valve setting incorrect (common)
2. Exhalation valve body defective (occasional)
3. Patient circuit or valve body faulty (occasional)
4. Transducer not properly verified (occasional)

First check

Check pressure relief valve setting

Test point: Pressure relief valve
Expected: Set per manual specifications

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

Low FIO2 (Fraction of Inspired Oxygen) patient safety

FIO2 reading is lower than expected

Ranked causes

1. Oxygen knob set incorrectly (common)
2. Oxygen analyzer accuracy questionable (occasional)
3. Blender requires overhaul (occasional)
4. Blender calibration incorrect (occasional)

First check

Set oxygen knob

Test point: O2 percentage control knob
Expected: Set to desired FIO2 percentage

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

Monitored exhaled tidal volumes are high or low patient safety

Tidal volume reading does not match expected or patient delivered volume

Ranked causes

1. Flow sensor not properly installed or defective (common)
2. Water migration in sensor tubing (occasional)
3. Mucus or debris in sensor (occasional)
4. Patient circuit or endotracheal tube leak (common)

First check

Verify flow sensor is properly installed

Test point: Flow sensor installation position
Expected: Flow sensor in correct patient circuit position

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

Pressurized Circuit Test fails (UVT)

User Verification Test Pressurized Circuit Test fails

Ranked causes

1. Leaks in humidifier or patient breathing circuit (common)
2. Pressure Relief Valve not at full clockwise position (occasional)
3. Inspiratory Pressure Control or High Pressure Alarm not at maximum (occasional)
4. Transducers need calibration (occasional)

First check

Inspect humidifier for leaks

Test point: Humidifier
Expected: No visible leaks

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

System will not hold PEEP patient safety

PEEP pressure does not remain stable at set level

Ranked causes

1. Patient breathing circuit connections leaking (common)
2. Exhalation valve diaphragm misaligned or damaged (common)
3. Internal tubing incorrectly connected (occasional)
4. Faulty exhalation valve body (occasional)

First check

Check patient breathing circuit connections for leaks

Test point: All circuit connections
Expected: No leaks

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

Vent hop alarm during power-on self-test (POST) patient safety

When power switch turned ON, ventilator sounds audible alarm, illuminates Vent hop indicator, and retains code number indicating failed POST test

Ranked causes

1. Mode select switch not set to mode (common)
2. Air and oxygen sources not turned on or not properly connected; gas pressures out of range (common)
3. AC/DC switch set incorrectly or AC line voltage set wrong (occasional)
4. DC power source not providing 12VDC or insufficient current capacity (occasional)

First check

Verify mode select switch setting

Test point: Mode select switch
Expected: Set to desired operating mode

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

Blender Alarm or Low Inlet Gas Pressure Alarm patient safety

Blender Alarm or Low Inlet Gas Pressure Alarm appears, with or without Vent hop alarm

Ranked causes

1. Inlet gas pressures out of range or pressure difference too high (common)
2. Blender calibration incorrect (occasional)
3. Blender requires overhaul (occasional)

First check

Measure inlet gas pressure from air source

Test point: Air inlet pressure port
Expected: 35-70 PSlG (2.4-4.8 bar), 35-70 PSlG
Tools: Pressure gauge

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

Circuit Leak Test fails (UVT)

User Verification Test Circuit Leak Test fails

Ranked causes

1. Leaks in patient breathing circuit or humidifier (common)
2. Pressure Relief Valve needs adjustment or replacement (occasional)
3. Exhalation valve, Safety Valve Assembly, or Jet pump components defective (occasional)

First check

Check patient breathing circuit for leaks

Test point: Patient circuit tubing and connections
Expected: No leaks; circuit intact

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

Manometer needle not moving during breaths patient safety

Manometer fails to show needle movement when ventilator delivers breaths

Ranked causes

1. Occluded or disconnected proximal airway line (common)
2. Faulty transducer or disconnected manometer tubing (occasional)
3. Transducer verification failure (occasional)

First check

Inspect proximal airway line for occlusion or disconnection

Test point: Proximal airway line
Expected: Line clear and connected

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

Auto cycling during assisted ventilation patient safety

Ventilator cycling repeatedly without patient effort or command

Ranked causes

1. Patient breathing circuit leaks exceed assist sensitivity setting (common)
2. Assist sensitivity setting too high (common)

First check

Check patient breathing circuit connections for leaks

Test point: All circuit connections
Expected: No leaks or leaks below assist sensitivity setting

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

Circuit Fault Alarm patient safety

Circuit Fault Alarm appears

Ranked causes

1. Passages in exhalation valve body occluded (common)
2. Inspiratory/Expiratory limb of patient breathing circuit occluded (common)

First check

Inspect exhalation valve body passages

Test point: Exhalation valve body interior
Expected: Passages clear; no blockage

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

Low peak pressure alarm patient safety

Alarm sounds indicating peak airway pressure is below set threshold

Ranked causes

1. Patient disconnected or circuit leak (common)
2. Water present in breathing circuit (occasional)

First check

Confirm patient breathing circuit connection

Test point: Patient circuit connection
Expected: Patient circuit connected

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

Monitor display will not scan monitored parameters patient safety

Monitor display does not scan or update monitored parameters

Ranked causes

1. Select button not activated for scanning (common)
2. SW504 switch 5 not in ON position (common)

First check

Press and hold Select button for three seconds

Test point: Select button
Expected: Automatic scanning starts

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

Peak Flow does not appear accurate

Peak Flow reading does not appear to be accurate

Ranked causes

1. Tidal Volume range incorrect for altitude; pressure setting wrong (common)
2. Transducers require calibration (occasional)

First check

Run Performance Test for tidal volume verification

Test point: Ventilator controls
Expected: Tidal Volume range correct for altitude

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

Unit does not power on

Power switch turned ON but unit does not power up; ON indicator does not illuminate

Ranked causes

1. No power at AC outlet, AC/DC select switch in wrong position, or AC voltage setting incorrect (common)
2. Power Supply PCB defective; incorrect DC voltages (occasional)

First check

Verify AC outlet has power

Test point: AC outlet
Expected: Power present

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

Unit does not power on (external DC source)

Ventilator attached to external DC power source but does not power up

Ranked causes

1. Battery not charged or AC/DC select switch in AC position (common)
2. Power Supply PCB defective (occasional)

First check

Test with known good power source

Test point: AC outlet or battery
Expected: Unit powers up with good source

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

Air inlet pressure alarm not triggering at correct threshold caution

Blender alarm does not activate at 30 ±2.0 PSIG when air inlet pressure reduced, or alarm does not reset at or below 44 PSIG when pressure restored

Ranked causes

1. Blender pressure alarm switch malfunction or miscalibration (common)

First check

Blender alarm activation during air pressure reduction

Test point: air inlet pressure gauge, alarm indicator
Expected: Alarm activates at 30 ±2.0 PSIG, ±2.0
Tools: air supply regulator, pressure gauge, visual/audible alarm

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

Alarm Silence button does not silence alarm for correct duration

Elapsed time between Alarm Silence button activation and alarm reinstatement not 60 ±5 seconds

Ranked causes

1. Alarm Silence duration timer circuit malfunction (common)

First check

Alarm Silence duration

Test point: stopwatch, alarm indicators
Expected: 60 ±5 seconds between button activation and alarm reinstatement, ±5
Tools: stopwatch, Alarm Silence button, alarm indicators

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

Ambient Pressure Test fails (UVT)

User Verification Test Ambient Pressure Test fails

Ranked causes

1. Internal transducers reading flow through patient breathing circuit (common)

First check

Disconnect patient breathing circuit

Test point: Patient circuit inlet
Expected: Circuit fully disconnected

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

Apnea alarm does not activate within timeout patient safety

Audible and visual alarm do not activate within 20 ±2 seconds after activating Manual Breath button with Rate set to zero

Ranked causes

1. Apnea alarm timing circuit malfunction or disabled (common)

First check

Apnea alarm activation time

Test point: stopwatch, alarm indicators (audible and visual)
Expected: 20 ±2 seconds from Manual Breath activation to alarm onset, ±2
Tools: stopwatch, manual breath button, alarm indicators

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

Audible alarm too loud, too soft, or absent (UVT) caution

Audible alarm is too loud, too low, or absent during Audible Alarm Test

Ranked causes

1. Alarm volume control setting incorrect; alarm silenced (common)

First check

Check Silence indicator status

Test point: Silence indicator LED
Expected: Silence indicator NOT illuminated

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

Breath rate inaccurate

Breath interval does not measure 6.0 ±0.2 seconds or breath rate not 10.0 ±0.3 breaths per minute

Ranked causes

1. Breath rate timing circuit malfunction or calibration drift (common)

First check

Measure breath interval at Rate setting of 10

Test point: manometer, stopwatch
Expected: 6.0 ±0.2 seconds per breath, ±0.2
Tools: stopwatch, manometer, test lung

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

Calibration: Circuit Leak Test

Verify patient circuit leak rate using data from pressurized circuit test

Ranked causes

1. Patient circuit leak excessive or leak test failure (unknown)

First check

Initiate leak test after PRS PASS

Test point: Monitor display
Expected: Leak test begins; display shows LEAKPASS if passed or HIGHFLOW/LEAKFAIL if failed

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

Calibration: Exhalation Pressure Transducer Span

Exhalation pressure reading out of specification; requires span adjustment via potentiometer R342

Ranked causes

1. Exhalation pressure transducer span drift (unknown)

First check

Press Select button to display exhalation pressure at 50 cmH2O

Test point: Monitor display
Expected: X 50.00 ? 1 .OO cmH2O, ±1.00 cmH2O

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

Calibration: Exhalation pressure transducer zero

Exhalation pressure transducer must read 0.00 ± 0.25 cmH₂O at zero reference; adjusted via R349 potentiometer

Ranked causes

1. Exhalation transducer out of zero specification (common)

First check

Check exhalation pressure transducer zero reading

Test point: Monitor display exhalation pressure (X)
Expected: 0.00 ± 1.00 cmH₂O, ±1.00
Tools: Ventilator monitor display

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

Calibration: Exhalation purge flow

Exhalation purge flow must be 0.03 to 0.08 LPM at exhalation pressure port

Ranked causes

1. Exhalation purge flow out of specification (common)

First check

Measure exhalation purge flow rate

Test point: Exhalation pressure port (right hole)
Expected: 0.03 to 0.08 LPM, 0.03–0.08
Tools: Flow tube

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

Calibration: Exhalation Valve current

Verify exhalation valve test circuit current reading on DMM during XVLV TST mode

Ranked causes

1. Exhalation valve current out of specification (unknown)

First check

Plug Exhalation Valve into current measuring test fixture and connect DMM

Test point: Exhalation Valve test fixture
Expected: DMM set to 200 mA range

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

Calibration: Flow Valve Reference Voltage

Verify flow valve reference voltage at test points TP 1003, TP 1004, and TP 1005 during FLOW CAL mode

Ranked causes

1. Flow valve reference voltage out of specification (unknown)

First check

Initiate flow valve test mode

Test point: Monitor display
Expected: Display reads FLOW CAL after pressing Manual Breath twice

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

Calibration: Inspiratory Pressure Verification patient safety

Verify peak inspiratory pressure (PIP) delivery at 30 cmH2O during infant flow volume test

Ranked causes

1. Peak inspiratory pressure out of specification (unknown)

First check

Position ventilator on stand at 7 degree angle

Test point: Ventilator placement
Expected: Ventilator on ventilator stand or tilted back 7 degrees

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

Calibration: Jet Pump Flow and Pressure caution

Verify jet pump exhalation flow rate and back-pressure at exhalation valve inlet

Ranked causes

1. Jet pump flow or back-pressure out of specification (unknown)

First check

Set ventilator to standard settings with PEEP/CPAP zero

Test point: Control panel settings
Expected: Ventilator configured per standard settings except PEEP/CPAP = 0

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

Calibration: Machine Pressure Transducer Span

Machine pressure reading out of specification; requires span adjustment via potentiometer R330

Ranked causes

1. Machine pressure transducer span drift (unknown)

First check

Press Select button to display machine pressure at 50 cmH2O

Test point: Monitor display
Expected: M 50.00 k2.00 cmH20 cmH2O, ±2.00 cmH2O

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

Calibration: Machine pressure transducer zero

Machine pressure transducer must read 0.00 ± 0.25 cmH₂O at zero reference; adjusted via R337 potentiometer

Ranked causes

1. Machine transducer out of zero specification (common)

First check

Check machine pressure transducer zero reading

Test point: Monitor display machine pressure (M)
Expected: 0.00 ± 2.00 cmH₂O, ±2.00
Tools: Ventilator monitor display

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

Calibration: Pressurized Circuit Test caution

Verify ventilator circuit pressurization to 55-65 cmH2O and transducer integrity at pressure

Ranked causes

1. Pressurized circuit test failure or transducer fault at pressure (unknown)

First check

Block patient wye and press Select

Test point: Monitor display
Expected: Display shows PRSR TST BLOCK PATIENT WYE PRESS SELECT

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

Calibration: Proximal Pressure Transducer Span

Proximal pressure reading out of specification; requires span adjustment via potentiometer R318

Ranked causes

1. Proximal pressure transducer span drift (unknown)

First check

Press Select button twice to display proximal pressure zero

Test point: Monitor display
Expected: P 0.00 + 1 .OO cmH2O

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

Calibration: Proximal pressure transducer zero

Proximal pressure transducer must read 0.00 ± 0.25 cmH₂O at zero reference; adjusted via R325 potentiometer

Ranked causes

1. Proximal transducer out of zero specification (common)

First check

Check proximal pressure transducer zero reading

Test point: Monitor display proximal pressure (P)
Expected: 0.00 ± 1.00 cmH₂O, ±1.00
Tools: Ventilator monitor display

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

Calibration: Proximal purge pressure caution

Proximal purge pressure must be set to 60 ± 3.0 cmH₂O and purge flow to 0.03–0.08 LPM

Ranked causes

1. Purge valve pressure out of specification (common)

First check

Verify proximal purge pressure via master manometer

Test point: Tube #3 (system manometer tube)
Expected: 60 ± 3.0 cmH₂O, ±3.0
Tools: Master manometer, tee fitting, proximal port blocked

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

Calibration: System pressure regulator

System pressure must be set to 25.0 PSIG for proper ventilator operation; verified via master manometer and DMM voltage measurement

Ranked causes

1. System pressure regulator out of specification (common)

First check

Verify system pressure via master manometer

Test point: Tube assembly #24
Expected: 25.0 ± 0.5 PSIG, ±0.5
Tools: Master manometer, tee fitting

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

Calibration: Transducer Zero Test

Verify all three pressure transducers (proximal, exhalation, machine) under no-flow condition

Ranked causes

1. Pressure transducer zero calibration failure (unknown)

First check

Attach test circuit to ventilator

Test point: PIN 10383 test circuit connection
Expected: Test circuit properly connected per Figure 5.11 without test lung

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

Calibration: Volume Monitor Flow Transducer Zero

Volume monitor flow transducer zero calibration without connected flow sensor or test harness

Ranked causes

1. Volume monitor flow transducer zero point drift (unknown)

First check

Disconnect flow sensor and test harness tubes 14 & 17

Test point: Volume Monitor PCB
Expected: Tubes disconnected

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

Calibration: Volume Monitor High Pressure Flow Transducer

Volume monitor high pressure (HP) flow transducer 2 cmH2O span calibration verification

Ranked causes

1. High pressure flow transducer span out of specification (unknown)

First check

Display high pressure flow calibration menu

Test point: Monitor display
Expected: HP F-CAL

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

Calibration: Volume Monitor Low Pressure Flow Transducer

Volume monitor low pressure (LP) flow transducer 2 cmH2O span calibration verification

Ranked causes

1. Low pressure flow transducer span out of specification (unknown)

First check

Display low pressure flow calibration menu

Test point: Monitor display
Expected: LP F-CAL

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

Calibration: Watchdog Timer

Verify watchdog timer functionality and millisecond counter tolerance during WDOG TST mode

Ranked causes

1. Watchdog timer out of tolerance (unknown)

First check

Initiate watchdog test

Test point: Monitor display
Expected: Display reads WDOG TST

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

Circuit Fault alarm (proximal pressure line disconnect)

Audible and visual Circuit Fault alarm activates; Circuit Fault indicator light illuminates

Ranked causes

1. Proximal pressure line disconnected from ventilator (common)

First check

Disconnect proximal pressure line and verify alarms activate

Test point: Proximal pressure port on front panel
Expected: Audible and visual Circuit Fault alarm activate, Circuit Fault indicator light illuminates

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

Circuit fault alarm active

Circuit fault alarm with High Pressure display flashing

Ranked causes

1. Unknown circuit fault condition (unknown)

First check

Press Reset button and verify Circuit Fault alarm cancels

Test point: Control panel Reset button
Expected: Circuit Fault alarm cancels, High Pressure display stops flashing

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

Control variable, push button, or Mode Select switch fails (UVT)

Variable control, push button switch, or Mode Select switch fail to perform correctly during Controls Test

Ranked causes

1. Poor solder joints on main board; control alignment or length incorrect (occasional)

First check

Remove Main Display boards from panel

Test point: Main Display boards
Expected: Boards removed and accessible

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

Error codes appear in monitor display window patient safety

Monitor displays error or alarm codes

Ranked causes

1. System fault condition detected (common)

First check

Record displayed error codes

Test point: Monitor display window
Expected: Specific 4-digit or alphanumeric code

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

Exhalation valve blockage alarm active patient safety

Audible alarm sounds indicating exhalation valve outlet is blocked

Ranked causes

1. Exhalation valve body outlet blocked (common)

First check

Verify audible alarm cancels after removing blockage

Test point: Exhalation Valve Body outlet
Expected: Audible alarm cancels

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

High Breath Rate alarm active caution

Audible and visual High Breath Rate alarm activates

Ranked causes

1. High Breath Rate control set below set rate (common)

First check

Verify High Breath Rate alarm activates when control set below set rate

Test point: High Breath Rate control
Expected: Audible and visual High Breath Rate alarm activate

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

High Pressure Alarm does not activate at correct threshold patient safety

High Pressure audible and visual alarms do not activate at 60.0 ±6.0 cmH₂O when High Pressure Alarm set to 60.0 cmH₂O and patient wye occluded

Ranked causes

1. High Pressure Alarm threshold comparator malfunction or miscalibration (common)

First check

High Pressure Alarm activation threshold

Test point: system pressure gauge, alarm indicators
Expected: Audible and visual alarms activate at 60.0 ±6.0 cmH₂O, ±6.0
Tools: system pressure gauge, Manual Breath button, alarm indicators

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

High Tidal Volume alarm active caution

Audible and visual High Tidal Volume alarm activates

Ranked causes

1. High Tidal Volume control set too low (common)

First check

Verify High Tidal Volume alarm activates when control set to 300mL

Test point: High Tidal Volume control
Expected: Audible and visual High Tidal Volume alarm activate

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

Indicator lamps or display segments fail to illuminate (UVT)

One or more indicator lamps or display segments fail to illuminate during Lamp Test; Vent hop or External DC visuals will not illuminate during test

Ranked causes

1. Ribbon cable not connected or loose; LEDs or seven-segment decoders not seated properly (common)

First check

Verify ribbon cable PIN 15481 connection

Test point: Ribbon cable at Main Display
Expected: Cable connected and tight

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

Loss of gas supply alarm active patient safety

Audible and visual Low Inlet Gas alarms activate when air and oxygen supply removed

Ranked causes

1. Air and oxygen supply pressure removed (common)

First check

Remove air and oxygen supply and verify alarms activate

Test point: Gas supply connections
Expected: Audible and visual Low Inlet Gas alarms activate

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

Low Inlet Gas Pressure alarm active caution

Audible and visual Low Inlet Gas alarm activates when inlet pressure reduced

Ranked causes

1. Inlet gas pressure below threshold (30 PSIG) (common)

First check

Set Pressure Support and Sensitivity parameters

Test point: Pressure Support control, Sensitivity control
Expected: Pressure Support set to 10 cmH20 or above, Sensitivity set to 1.0 cmH20

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

Low Minute Volume alarm active caution

Audible and visual Low Minute Volume alarm activates

Ranked causes

1. Low Minute Volume control set too high (common)

First check

Verify Low Minute Volume alarm activates when control set to 25.0L

Test point: Low Minute Volume control
Expected: Audible and visual Low Minute Volume alarm activate

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

Low Peak Pressure Alarm does not activate correctly patient safety

Audible and visual alarms do not activate when Low Peak Pressure Limit set above observed peak pressure, or do not deactivate when set to OFF

Ranked causes

1. Low Peak Pressure Alarm comparator or control circuit malfunction (common)

First check

Peak pressure observation during standard operation

Test point: system manometer
Expected: Peak pressure reading visible during inspiratory cycle
Tools: system manometer

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

Manual Breath button does not cancel audible alarm

Audible alarm does not cancel after pressing Manual Breath button three times

Ranked causes

1. Audible alarm cancellation circuit or Manual Breath control logic malfunction (common)

First check

Audible alarm cancellation with three Manual Breath activations

Test point: Manual Breath button, audible alarm
Expected: Audible alarm cancels after third Manual Breath button press
Tools: Manual Breath button, alarm indicator

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

Manual breath does not deliver one breath patient safety

Pressing Manual breath button does not deliver a single breath to patient circuit

Ranked causes

1. Manual breath mechanism malfunction or control circuit failure (common)

First check

Manual breath button response

Test point: Manual breath button, test lung pressure rise
Expected: One breath delivered upon button press
Tools: test lung, manometer

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

Monitor display breath rate (BPM) out of range

BPM LED lit, but monitor display does not read 10 ±2.0 breaths per minute

Ranked causes

1. Breath rate sensor or display calculation error (common)

First check

Read breath rate (BPM) on monitor display

Test point: monitor display, BPM LED
Expected: 10 ±2.0 BPM, ±2.0
Tools: ventilator monitor display

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

Monitor display I:E Ratio out of range

I:E Ratio LED lit, but monitor display does not read 1:6.5 to 1:9.0

Ranked causes

1. I:E ratio calculation circuit malfunction (common)

First check

Read I:E Ratio on monitor display

Test point: monitor display, I:E Ratio LED
Expected: 1:6.5 to 1:9.0
Tools: ventilator monitor display

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

Monitor display Inspiratory Time (Ti) out of range

Ti LED lit, but monitor display does not read 0.6 ±0.1 seconds

Ranked causes

1. Inspiratory time measurement or display circuit malfunction (common)

First check

Read Inspiratory Time (Ti) on monitor display

Test point: monitor display, Ti LED
Expected: 0.6 ±0.1 seconds, ±0.1
Tools: ventilator monitor display

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

More symptoms

Monitor display Mean Airway Pressure (MAP) out of range
Monitor display minute ventilation (VE) out of range
Monitor display PEEP reading out of range
Monitor display pressure reading out of range
Monitor display tidal volume (VT) out of range
Over Pressure Relief Valve does not function
Oxygen concentration reading out of range at 100%
Oxygen concentration reading out of range at 21%
Oxygen concentration reading out of range at 30%
Oxygen concentration reading out of range at 60%
Oxygen concentration reading out of range at 90%
Oxygen inlet pressure alarm not triggering at correct threshold
Patient demand trigger does not activate at correct sensitivity
PEEP/CPAP plus Pressure Support reading incorrect
Reset button does not cancel visual alarm
Safety Valve dump time exceeds specification
Tidal volume out of range
Vent hop alarm activates on power loss
Verification: Exhalation Valve Drive Current
Verification: Fiber Optic Link Integrity
Verification: Open Potentiometer Detection Circuit
Verification: Volume Monitor Event Code Status
Verification: Volume Monitor Fiber Optic Loopback Test
Verification: Volume Monitor Purge Function
Verification: Volume Monitor Solenoid Leak Test
Volume Monitor Solenoid Test fails (UVT)

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

Error codes

Code	Meaning	Trigger	Severity
`Circuit Fault`	Circuit fault condition detected on ventilator	Exhalation valve outlet blockage or proximal pressure line disconnection	error
`CPU A executed unused memory space`	CPU A executed code in unused memory area	CPU A instruction pointer jumped to unused memory	critical
`CPU B executed unused memory space`	CPU B executed code in unused memory area	CPU B instruction pointer jumped to unused memory	critical
`CPU B interrupted CPU A with VENT INOP`	CPU B interrupted CPU A causing ventilation inoperative condition	CPU B generated VENT INOP interrupt to CPU A	critical
`CPU C executed unused memory space`	CPU C executed code in unused memory area	CPU C instruction pointer jumped to unused memory	critical
`Flow control valve did not home (multiple)`	Flow control valve failed to return to home position for specified breath type	Stepper motor control failure during breath cycle initialization	error
`High Breath Rate`	Measured breath rate exceeds High Breath Rate alarm threshold	Actual respiratory rate falls below High Breath Rate control setting	warning
`High Tidal Volume`	Delivered tidal volume exceeds High Tidal Volume alarm threshold	Actual tidal volume falls below High Tidal Volume control setting	warning
`Low Inlet Gas`	Inlet gas (air or oxygen) pressure falls below alarm threshold	Supply pressure reduced below 30 PSIG or air/oxygen supply removed	error
`Low Minute Volume`	Delivered minute volume falls below Low Minute Volume alarm threshold	Actual minute volume exceeds Low Minute Volume control setting	warning
`Mode switch failed`	Ventilator mode selector switch malfunction	Switch reading does not correspond to physical switch position	warning
`PROM configuration bytes do not match`	PROM configuration data inconsistency detected	Configuration bytes read from PROM do not match expected values	error
`Vent hop`	Ventilator hop-up alarm; power loss detected or brownout voltage condition	Electrical power removed or voltage falls below brownout threshold	critical
`Watchdog timer failed`	Hardware watchdog timer circuit malfunction	Watchdog logic does not time out as expected during self-test	critical

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.