GE Aestiva 5 Service Manual
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5 Alarms and Troubleshooting 1006-0939-0005-55-5 Apnea Alarm StandbyLow Normal condition after End Case, power-up, or ACGO change from On to OffMonitoring resumes after first breath (mechanical) or 2 breaths within 30 seconds (non-mechanical).- - - Apnea Alarm Off Low The cardiac bypass option is selected (alarm limit menu).Apnea alarms are normally turned off when this option is selected.- - - Aux Gas Outlet On Medium (low after acknowledged)The outlet selection switch is set to the auxiliary common gas outlet.Connect the patient circuit to the auxiliary outlet. For mechanical ventilation or manual ventilation with monitoring, select the common gas outlet.- - - Backup Mode ActiveLow SIMV-PC + PSV mode entered.Spontaneous breath rate fell below the set breath rate- - - Battery Charger FailLow The current in the battery charging circuit is too high.The system is operational, but may fail later depending on what caused this alarm. Contact a qualified service representative. Battery Charging Low The battery is not fully charged. If power fails, the total backup time will be less than 30 minutes.Leave the system plugged in to charge the battery.- - - Battery Current HighLow Battery current > 6 amps for 10 seconds.The system continues to operate, but may fail.Contact a qualified service representative. Battery Failure HighLow Battery voltage > 16 V for 10 seconds.The system continues to operate, but may fail.Contact a qualified service representative. Battery Failure Low Low The battery voltage is too low (
Aestiva 5-61006-0939-000 5-6 Cal Flow Sensors Low The last flow sensor calibration failed.Calibrate the flow sensors. Look for water in the flow sensor tubes. Dry if necessary.Contact a qualified service representative. Calibrate O 2 SensorLow O 2%>110% Does the sensor measure 21 % O 2 in room air?Calibrate O 2 sensor. Canister open Medium The canister release is open (large leak) without a bypass mechanism.Close the canister release. A switch checks the release position. Cannot Drive BellowsLow The internal manifold pressure is higher than Paw + tolerance.Fill the bellows if empty. - - - Cardiac Bypass Low The alarm limit settings are set for a patient on cardiac bypass. Apnea alarms are off.Use the alarm limits menu to change this setting.- - - Check Flow SensorsMedium (low after acknowledged)No flow or negative flow on inspiratory sensor during inspiration in a circle system or negative flow on expiratory sensor in expiration (for 6 breaths in a row).Are the flow sensors correctly installed? Water build-up in the flow sensor tubes? Is a flow sensor tube cracked or broken?Inspect one way valves (breathing circuit module). Replace flow sensor module with the spare. Check the condition of the flow sensor and its tubing. Circuit Leak Audio OffLow Control setting on the Alarm limit menu.This message tells you that the audio alarm for circuit leaks was turned off. - - - Connect O 2 Sensor Low The O2 sensor is not connected to the cable.Connect the sensor. Contact a qualified service representative to replace the cable. Message Priority Cause Action/Concerns Repair
5 Alarms and Troubleshooting 1006-0939-0005-75-7 Control Settings Input has FailedMinimum monitoring (Medium)Ventilator malfunction. Ventilate manually. Monitoring is still available.Contact a qualified service representative. CPU Failure Minimum shutdown (High)Ventilator malfunction. Ventilate manually. Monitoring is not reliable.Contact a qualified service representative. CPU Internal Error Minimum shutdown (High)Ventilator malfunction. Ventilate manually. Monitoring is not reliable.Contact a qualified service representative. Display Voltage Out-Of-RangeMinimum shutdown (High)Ventilator malfunction. Ventilate manually. Monitoring is not reliable.Contact a qualified service representative. Exp Flow Sensor FailLow The system cannot read the calibration data stored in the sensor.Operation continues with default values. Replace the flow sensor.- - - Exp Reverse Flow Medium (low after acknowledged)Flow through the expiratory sensor during inspiration (for 6 breaths in a row).Look at the check valves. Water build-up in the flow sensor tubes? Is a flow sensor tube cracked or broken?Replace the expiratory check valve. Check the condition of the flow sensor. Flow Valve (DAC) Failure Flow Valve (current) Failure Minimum monitoring (Medium)Ventilator malfunction. Ventilate manually. Monitoring is still available.Contact a qualified service representative. Gas Inlet Valve FailureMinimum shutdown (High) 1 Ventilator malfunction. Ventilate manually. Monitoring is still available.Contact a qualified service representative. Hardware Watchdog FailureMinimum shutdown (High)Ventilator malfunction. Ventilate manually. Monitoring is not reliable.Contact a qualified service representative. Message Priority Cause Action/Concerns Repair
Aestiva 5-81006-0939-000 5-8 Heliox Mode is On Low Control setting on ventilation setup menu.When Heliox is used, the ventilator must adjust volume calculations.- - - High O 2Medium O2% > alarm high limit setting.Is the limit set correctly? What is the O 2 flow? Did you just push Flush? Does the sensor see 21% O 2in room air?Calibrate O 2 sensor. Replace O 2 sensor. High Paw High Paw is greater than Plimit. The ventilator cycles to expiration.Are Plimit and other controls set correctly? Look for blockages. Check the patient connection.Calibrate the flow sensors. Replace the receiver filter. High Ve Medium The minute volume is greater than the set high limit. This alarm is suspended for 9 breaths after you change the ventilator settings.Check patient for spontaneous breathing. Adjust control settings.- - - High Vte Medium V TE is greater than high alarm limit. This alarm is suspended for 9 breaths after you change the ventilator settings.Check patient for spontaneous breathing. Check ventilator and alarm settings.- - - Insp Flow Sensor FailLow The system cannot read the calibration data stored in the sensor.Operation continues with default values. Replace the flow sensor.- - - Inspiration StoppedHigh Drive gas safety switch activated (high pressure)Adjust controls. Check systems for blockages.- - - Insp Reverse Flow Medium (low after acknowledged)Flow through the inspiratory sensor during expiration (for 6 breaths in a row).Look at the check valves. Water build-up in the flow sensor tubes? Is a flow sensor tube cracked or broken?Replace the inspiratory check valve. Check the condition of the flow sensor. Message Priority Cause Action/Concerns Repair
5 Alarms and Troubleshooting 1006-0939-0005-95-9 Internal Ventilator Clock Too FastMinimum shutdown (High)Ventilator malfunction. Ventilate manually. Monitoring is not reliable.Contact a qualified service representative. Internal Ventilator Clock Too SlowMinimum shutdown (High)Ventilator malfunction. Ventilate manually. Monitoring is not reliable.Contact a qualified service representative. Invalid Circuit ModuleLow The system does not recognize the type of circuit module installed. Normally the system uses the ID tabs to Identify circuits.Make sure the module is correctly installed. Look for broken ID tabs or tape on the tabsContact a qualified service representative Limit Task Light Use Low The system is running on battery power. Turn off the light to save power.Turn off the light to extend battery backup.- - - Loss of Backup AudioMedium (low after acknowledged)The audio alarm will not sound for a CPU failure.Monitor system operation. Contact a qualified service representative. Low Battery VoltageMedium Voltage is
Aestiva 5-101006-0939-000 5-10 Low Paw Medium Paw does not rise at least 4 cm from the lowest pressure measured during the last 20 seconds.Are circuit connections OK? Look at the Paw gauge on the absorber.Look for circuit disconnection. Low Ve Medium Exhaled minute volume
5 Alarms and Troubleshooting 1006-0939-0005-115-11 Monitoring Only Medium A severe malfunction prevents mechanical ventilation. Other alarms may also occur. Ventilate manually. Cycle system power (On- Standby- On). If the alarm clears, restart mechanical ventilation.Contact a qualified service representative. No Circuit Module Low The patient circuit module is not installed.Install a module. Refer to the Setup section.Optical sensors look for tabs on the back of the module. Is the module assembled? are the sensors dirty? No CO 2 Absorption Medium (low after acknowledged)The canisters are open (out of the circuit) but the bypass mechanism prevents a leak (optional feature).User setting. Close the canister release to remove CO 2 from exhaled gas- - - No Exp Flow Sensor No Insp Flow SensorMedium (low after acknowledged)Electrical signals show the flow sensor is not connected.Connect the flow sensors. Make sure the flow sensor module is on all the way.- - - No message, only specific shutdown messageHigh A severe malfunction prevents mechanical ventilation and monitoring. Other alarms may also occur. Ventilate manually. Use a stand-alone monitor. Cycle system power (On- Standby- On). If the alarm clears, restart mechanical ventilation.Contact a qualified service representative No O 2 Pressure High (cannot be silenced)The O2 supply has failed. Air flow will continue. Ventilate manually if necessary. Connect a pipeline supply or install an O 2 cylinder.- - - O 2 Flush Failure Low The pressure switch that detects flush flow has seen a very long flush (≥30 seconds).This alarm occurs if you hold down the Flush button for more than 30 seconds.If the alarm occurs when flush is not in use, contact a qualified service representative. Message Priority Cause Action/Concerns Repair
Aestiva 5-121006-0939-000 5-12 O2 Sensor out of circLow O2 sensor not installed in breathing circuit module; sensor not measuring gas in breathing circuit.Install a breathing circuit module and an O 2 sensor.- - - On Battery - Power OK?Medium (low after acknowledged)The mains supply is not connected or has failed and the system is using battery power.Ventilate manually to save power. At full charge, the battery permits approx. 30 minutes of mechanical ventilation.Make sure power is connected and circuit breakers are closed. Check ventilator fuse. Patient Circuit Leak?Medium Exhaled volume
5 Alarms and Troubleshooting 1006-0939-0005-135-13 Pres/Vol Mon InactiveMedium Outlet selection switch is set to auxiliary gas outlet.Connect the patient circuit to the auxiliary gas outlet or set the switch to the common gas outlet for normal operation.- - - Pressure Limit Switch FailureMinimum monitoring (Medium)A pressure safety switch activated at a Paw
Aestiva 5-141006-0939-000 5-14 Sustained Paw High Paw > sustained pressure limit for 15 seconds 3.Check tubing for kinks, blockages, disconnects.Calibrate the flow sensors. System Leak? Medium Delivered volumes do not match set volumes.If you are using Heliox, select Heliox on the ventilator setup menu. Look for leaks in the manifold. Compare set to delivered volumes.Calibrate the flow sensors. Drain water buildup from the breathing system. Vaux_ref Out-of- RangeMinimum shutdown (High)Ventilator malfunction. Ventilate manually. Monitoring is not reliable.Contact a qualified service representative. Vext_ref Out-of- RangeMinimum shutdown (High)Ventilator malfunction. Ventilate manually. Monitoring is not reliable.Contact a qualified service representative. Volume Apnea Medium No mechanical breaths or spontaneous breaths >20 mL in last 30 seconds.Check patient. Bag as needed. Check for disconnects. If the patient is on a heart lung machine, select Cardiac Bypass on the main menu.- - - Vol Apnea > 2 min High No mechanical breaths or spontaneous breaths >20 mL in last 120 seconds.See above. - - - Vt Not Achieved Low Tidal volume measured by inspiratory flow sensor < set value 6 breaths in a row after the first minute of mechanical ventilation.Adjust controls to supply adequate tidal volumes. Check I:E; Plimit; and volume settings.Possible leak. Vte > Insp Vt Medium Expired volume > inspired volume for 6 breaths with a circle module. Check patient condition. - - - 1.When power is first turned on. 2. Flow sensors are also used to measure pressures. 3. The sustained pressure threshold is calculated from the pressure limit setting. When mechanical ventilation is on, the sustained limit is calculated as follows: for pressure limits < 30 cmH 2O, the sustained pressure limit is 6 cmH2O; for Plimit between 30 and 60 cmH2O, the sustained limit is 20% of the pressure limit (Plimit); for pressure limits > 60 cmH 2O, the sustained pressure limit is 12 cmH2O. If both PEEP and mechanical ventilation are on, the sustained pressure limit increases by PEEP - 2 cmH 2O (the compensated weight of the bellows). When mechanical ventilation is off, the sustained pressure limit is calculated as follows: for pressure limits ≤ 60 cmH 2O, the sustained pressure limit is 50% of the pressure limit (Plimit); for pressure limits > 60 cmH 2O, the sustained pressure limit is 30 cmH2O. Message Priority Cause Action/Concerns Repair