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Operational Trouble Shooting Guide
"02" in ON/OFF display VENTILATOR FAULT visual alarm. Purge tubing is disconnected. Reconnect tubing at PURGE outlet on the front panel or at FROM PURGE inlet on patient box. Patient box problem. Call the Bunnell Hotline to determine if the patient box needs to be replaced. Electronic problem. If unable to pass TEST, call the Bunnell Hotline to determine if the Life Pulse needs to be replaced. "03" in ON/OFF display; VENTILATOR FAULT visual alarm. One or more of the servo pressure control valves is compromised. If unable to pass TEST, call the Bunnell Hotline to determine if the Life Pulse needs to be replaced. "04" in ON/OFF display; VENTILATOR FAULT visual alarm. Electronics problem. If unable to pass TEST, call the Bunnell Hotline to determine if the Life Pulse needs to be replaced. All displays are blank; with LOW GAS PRESS visual alarm. No gas supply connected. Connect high pressure output of air-oxygen blender. Press STANDBY to exit test mode. Gas at less than 30 psi is being supplied. Check for leaks in high pressure hoses, fittings and connectors or loss of gas pressure form source. Press STANDBY to exit test mode. Gas supply pressure switch has problem. Call the Bunnell Hotline.
Operational Conditions Where Life Pulse Continues Running : Life Pulse momentarily stops running, dumps the servo pressure, flashes "8" in all the displays, then resumes running with an audible alarm. The electrical supply for the Life Pulse was momentarily disrupted. Press the SILENCE and ENTER buttons and resume operation. VENTILATOR FAULT alarm. Other alarms may also appear. Purge tubing has been disconnected at the front panel, at the patient box, or internally. Reconnect purge tubing. If alarm persists, call the Bunnell Hotline to determine if tubing has been disconnected internally. LOSS OF PIP. Other alarms may also appear. Pressure monitoring lumen of the Hi-Lo Jet tracheal tube or the LifePort adapter is disconnected or obstructed. Re-connect pressure monitoring lumen (PML) to Hi-Lo Press lumen port on top of patient box. Check patient circuit for excess condensation. Adjust cartridge temperature as needed. Press ENTER button to resume ventilation if SERVO PRESS <1.0. Power to the patient box has been disrupted. Call the Bunnell Hotline to determine if the patient box or the Life Pulse needs to be replaced. The pressure transducer in the patient box is malfunctioning. Call the Bunnell Hotline to determine if the patient box needs to be replaced. Life Pulse in READY mode with HIGH SERVO PRESS alarm and 25.0 in SERVO PRESS display. Servo pressure transducer stuck in maximum signal output state. Call the Bunnell Hotline to determine if the Life Pulse needs to be replaced. Unusually high SERVO Pressure. A gas leak exists somewhere in the humidifier or circuit. If leak is found, change humidifier cartridge/circuit. Call the Bunnell Hotline if a leak is NOT found. SERVO PRESS = 0.0 when READY light comes on. Servo pressure transducer problem: no output. Call the Bunnell Hotline to determine if the Life Pulse needs to be replaced. LOW GAS PRESS alarm in the presence of adequate supply. Problem with the gas supply pressure switch. Call the Bunnell Hotline. LOSS OF PIP, LOW MAP, and LOW SERVO PRESS alarms. No LOW GAS PRESS alarm in the absence of adequate supply. Loss of gas supply and problem with the gas supply pressure switch. Call the Bunnell Hotline to determine best method of repairing gas supply or connection. Life Pulse operating without gas delivery: No output from GAS OUT port. LOSS OF PIP alarm occurred in Non-READY mode. Press the ENTER button to clear LOSS OF PIP and resume ventilation. Dump valve is obstructed. Call the Bunnell Hotline to determine if the Life Pulse needs to be replaced. Servo pressure valves are not opening. Call the Bunnell Hotline to determine if the Life Pulse needs to be replaced. Internal tubing has become disconnected. Call the Bunnell Hotline to determine if the Life Pulse needs to be replaced. No output from patient box. Pinch valve problem. Call the Bunnell Hotline to determine if the patient box needs to be replaced. No output from humidifier circuit. Humidifier cartridge is blocked off. Call the Bunnell Hotline to determine if the humidifier cartridge needs to be replaced. Immediate CANNOT MEET PIP alarm upon start-up. Servo pressure transducer stuck in full output state. Call the Bunnell Hotline to determine if the Life Pulse needs to be replaced. Excessive PEEP. Inadequate time for exhalation. Increase exhalation time by decreasing ON-TIME and/or HFV RATE. Decreased minute volume may then be compensated for by increasing PIP. Water in the pressure monitoring tubing. Flush the pressure monitoring lumen of Hi-Lo Jet tube or LifePort adapter with 2-5 ml dry gas via syringe. Reconnect to patient box as soon as possible. Consider suctioning the patient and reducing the humidifier cartridge temperature. Partial obstruction of exhalation limb of conventional circuit. Eliminate obstructions in the exhalation limb of the conventional ventilator's patient circuit. Patient Box pressure transducer is out of calibration. Test by pressing STANDBY button and disconnecting Life Pulse from patient. Attach circuit to test lung, press enter button. When PIP is reached, check PEEP display to see that it reads between "1.0" and "-1.0". If not, call Bunnell the Hotline. Loud Patient Box Valve is out of alignment or Poron Pad is wearing out. Call the Bunnell Hotline to determine if the patient box needs to be replaced. Inadequate control of PIP. Monitored pressures are unstable. Water in pressure monitoring line.
Patient needs to be suctioned.
Spontaneous breathing or increased chest tube activity.
Flush pressure monitoring lumen of the Hi-Lo Jet tracheal tube or LifePort adapter with 2-5 ml dry gas via syringe. Lower humidifier cartridge temperature a degree or two so that excess condensation decreases NOTE: it may take 20 minutes or so before excess condensation evaporates. Suctioning of the patient's tracheal tube may also help alleviate fluctuating PIP. CAUTION: Do not eliminate all condensation. It is important to keep the gas delivery near 100% relative humidity at 37oC in order not to damage tracheal mucosa. Problem with Servo pressure control valve(s). Support the patient with the conventional ventilator and attach the Life Pulse to a test lung. Press TEST button. If test stops with "03" in the ON/OFF display, problem with the Servo pressure control valves is confirmed. Call the Bunnell Hotline to determine if the Life Pulse needs to be replaced. Servo pressure does not dump when Life Pulse enters Standby mode; HIGH PIP visual alarm. Dump valve is not opening or is obstructed. Call the Bunnell Hotline to determine if the Life Pulse needs to be replaced. Servo pressure will not rise with LOSS OF PIP and CANNOT MEET PIP alarms. LOSS OF PIP alarm occurred in Non-READY mode. Press the ENTER button to clear LOSS OF PIP and resume ventilation. Dump valve will not close. Call the Bunnell Hotline to determine if the Life Pulse needs to be replaced. CIRCUIT FAULT alarm occurs within 2 minutes after new circuit is installed. Water pump is bypassed.
Water I.V. feed set clamp or stopcock is shut.
Water supply bag is not connected.
Check and correct any and all of the listed possible causes of water supply problem.
If circuit fault continues call Bunnell Hotline to determine if the Life Pulse and/or the circuit needs to be replaced.Excess condensation near tracheal tube. Humidifier cartridge temperature too high. Reduce humidifier cartridge temperature a degree or two. Consider suctioning patient or flushing pressure monitor tubing if pressure displays are erratic. NOTE: Water in the humidifier cartridge cools slowly. Patience and follow-up are necessary to find the optimal cartridge temperature setting. CAUTION: Overreaction to excessive condensation may cause under-humidification with subsequent damage to tracheal mucosa. CIRCUIT TEMP LOW alarm. Humidifier cartridge problem. Replace humidifier cartridge. Problem with power to the circuit heater. Call the Bunnell Hotline to determine if the Life Pulse needs to be replaced. CIRCUIT TEMP HIGH alarm. Humidifier cartridge problem. Call the Bunnell Hotline before replacing the humidifier cartridge. Problem with control of circuit heater. Call the Bunnell Hotline to determine if the Life Pulse needs to be replaced. CARTRIDGE TEMP LOW alarm. Humidifier cartridge problem. Call the Bunnell Hotline before replacing the humidifier cartridge. Problem with power to the circuit heater. Call the Bunnell Hotline to determine if the Life Pulse needs to be replaced. CARTRIDGE TEMP HIGH alarm. Humidifier cartridge problem. Call the Bunnell Hotline before replacing the humidifier cartridge. Problem with control of circuit heater. Call the Bunnell Hotline to determine if the Life Pulse needs to be replaced. Water pump fails to turn on with no alarms. Humidifier cartridge problem. Call the Bunnell Hotline before replacing the humidifier cartridge. CIRCUIT FAULT alarm appears immediately at start-up. Humidifier door has not been closed, door or latch problem. Close humidifier door. If necessary, call the Bunnell Hotline to determine if the door or latch needs to be replaced.
Humidifier Operational Conditions where Life Pulse continues Running Water pump fails to turn on with CIRCUIT FAULT alarm appearing 2 minutes after initiation of startup or with the LEVEL LOW alarm after the Life Pulse has been running for some time. Water pump problem. Push WAIT button. Clamp and disconnect the water supply I.V. tubing from the cartridge using sterile technique. Open pump latch and push WAIT again. If the pump turns on, close pump latch, re-attach and unclamp I.V. tubing, and press WAIT to re-start pump.
If the pump does not turn on when its latch is open, turn power off and back on. If problem persists, call the Bunnell Hotline to determine if the Life Pulse needs to be replaced.
LOW LEVEL alarm. Humidifier pump timed out at start up. Press the wait button twice. Water supply has been depleted. Replace water supply. Water pump problem. Call the Bunnell Hotline to determine if the Life Pulse needs to be replaced. Humidifier cartridge problem. Call Bunnell Hotline before replacing humidifier cartridge. HIGH LEVEL alarm. Problem with control of water pump. Call the Bunnell Hotline to determine if the Life Pulse needs to be replaced. Cartridge filled by gravity; water fill tubing not properly installed in pump. Press wait, insure the pump latch is securely fastned over the water fill tubing, press WAIT. Humidifier stays in WAIT mode with blank displays. Humidifier placed in WAIT mode manually. Press WAIT button to release manual WAIT. Problem with control signal from the ventilator. Call the Bunnell Hotline to determine if the Life Pulse needs to be replaced.
Humidifier Operational Conditions where the Life Pulse Humidifier STOPS Running: Humidifier does not enter WAIT mode when STANDBY is pressed. Displays remain lit and heater remains active. Problem with control signal from the ventilator. Call the Bunnell Hotline to determine if the Life Pulse needs to be replaced. Humidifier stops operating with blank displays. Internal power supply problem. Call the Bunnell Hotline to determine if the Life Pulse needs to be replaced. Humidifier stops operating with "3"s displayed. Problem with power to the humidifier. Turn power off and then back on. If "3"'s clear, the humidifier has reset and should function normally. If "3"'s do not clear, call the Bunnell Hotline to determine if the Life Pulse needs to be replaced.
Operational Conditions Where The Life Pulse STOPS Running: Life Pulse stops operating with audible alarm and a blank front panel. Electrical plug has been pulled from the wall. Plug the Life Pulse into the wall outlet. The hospital has lost its electrical power. Manually ventilate the patient as needed. Problem with the internal power supply of the Life Pulse. Call the Bunnell Hotline to determine if the Life Pulse needs to be replaced. Life Pulse reverts to STANDBY mode with audible alarm. Hospital electrical power loss of more than one minute duration. Press ENTER and SILENCE buttons. If control section displays default settings, review patient flow chart and reset proper PIP, RATE, and ON-TIME. Press ENTER again. Life Pulse stops operating with HIGH PIP, HIGH MAP, and possibly LOW SERVO PRESS alarms. The exhalation limb of the conventional circuit is obstructed. Clear the exhalation circuit of kinks or obstructions. The pressure monitoring line from the Hi-Lo Jet tracheal tube or LifePort adaptor is kinked or obstructed. Unkink or clear the pressure monitoring line. The pressure transducer in the patient box is malfunctioning. Call the Bunnell Hotline to determine if the Life Pulse needs to be replaced. Life Pulse stops operating with JET VALVE FAULT and LOSS OF PIP alarms. Pinch valve problem. Call the Bunnell Hotline to determine if the patient box needs to be replaced. Life Pulse stops operating with VENTILATOR FAULT and other alarms. A failure code, "01" through "09", is displayed in the JET VALVE ON/OFF display window. Electrical irregularity has disrupted the microprocessor functions. Turn power to Life Pulse off for 2-3 minutes and then turn power back on. If Life Pulse passes the self test, restart on patient and call the Bunnell Hotline. Problem with the internal power supply of the Life Pulse. Call the Bunnell Hotline to determine if the Life Pulse needs to be replaced. Other electronic circuitry problem. Call the Bunnell Hotline to determine if the Life Pulse needs to be replaced. Power to the patient box has been disrupted. Check patient box connections. Call the Bunnell Hotline to determine if the Life Pulse needs to be replaced. The Servo pressure valves will not open. Call the Bunnell Hotline to determine if the Life Pulse needs to be replaced. VENTILATOR FAULT alarm and has automatically assumed the standby mode; "10" displayed in the ON/OFF window. Servo pressure has risen suddenly because of a radical change in operating parameter. Press the SILENCE and ENTER buttons, and resume operation. One or more of the Servo pressure control valves is stuck open. Call the Bunnell Hotline to determine if the Life Pulse needs to be replaced. VENTILATOR FAULT and HIGH PIP alarms. Purge valve has stuck open. Call the Bunnell Hotline to determine if the Life Pulse needs to be replaced.
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