Newport HT70 Plus Ventilator Troubleshooting

Newport Medical Instruments Inc. Newport HT70 & Newport HT70 Plus Released March 4, 2010 Product Code: 73-CBK

The battery of ventilator is dead sooner than expected.

Make sure to check the outlet with no OFF position. Losing power can be caused by the loose connecting wire to the outlet. Consider testing it in another outlet.

Check the adapter and power cable have any physical damage. Plug and unplug from the wall outlet and see the battery is charged. If it is broken or battery is not charging, consider changing either cable or adapter.

If the battery is resorting to back-up power after fully charged, it could be the battery problem. Inspect the battery for nay leak and make sure that it still has charged in it. If not, you might need to replace it with the new battery.

Ensure to plug in the correct transducing line to proximal line and exhalation valve and check all connections and humidifiers are functioning well.

If there is an obstruction such as fluid or dirt in the ventilator circuit, disassemble all pieces of the circuit and use unscented or non-antibacterial soap to wash those pieces. However, the exhalation valve and sensing wires should not be cleaned.

Intake Filters should be checked weekly. Replace the filter when the surface area of the filter is no longer white. The Intake filter is in the right side of the ventilator behind the filter cover.

The HT70 Ventilator should not be operated without a clean Air Intake Filter installed. Never re-use a dirty Air Intake Filter in reverse.  

This is one issue that may arise from likely problems with the connection of the breathing circuit. Check to make sure that the breathing circuit is connected and does not have any leaks. If problem persists, user may want to seek out replacement of patient circuit and/or pump assembly.

The system displays that an error has occurred. This may be due to a number of calibration issues, review Event History Log for specific error. ''

HT70 calibrations should be performed for any repair, and for scheduled preventative maintenance, which is especially important to pay attention to during times of heavy usage (COVID-19). A number of system errors may occur if the calibrations of this machine are not maintained. The scheduled calibrations are as follows: Every 24 months or 15,000 hour service.

For system error pertaining to pump leak calibration, use the following steps:

1.     On the calibration screen, select ‘pump leak cal’. A message will appear asking you to ‘attach the rp50 to the patient outlet. Press the button when ready.’

2.     Make sure to connect the rp50 parabolic resistor to the patient outlet (Main flow outlet) (you may have to disconnect the breathing circuit to do this). DO NOT BLOCK OPEN END.

3.     Select ‘Rp50 Ready.’

4.     Wait for the ventilator to perform its calibration. The unit will increase speed slowly.

5.     If the calibration is passed, a message telling you that the calibration has passed should appear. Proceed by pressing the ‘Accept Cal’ button to save the calibrated value.

6.     If the test fails, press ‘cancel Cal’ and repeat calibration procedure.

7.     **IMPORTANT: Make sure to remove Rp50 from Main flow outlet and reconnect breathing circuit to Main flow outlet.

For System error pertaining to FiO2 Sensor, recalibrate by using the following steps:

1) Press the ‘Start O2 Cal’ button.

2) Press the ‘O2 Ambient Ready’ button.

      Note: During test the ventilator will display ‘Please Wait’.

         Once completed, the ventilator will state ‘O2 100% Ready’.

3)  Connect the HT70 Low Flow Oxygen Reservoir to the ventilator.

4) Connect the O2 gas source to your flow meter. (note: make sure

the flow meter adjustment knob is in the off position.)

5)  Turn on the oxygen source and turn the flow meter up to 10 L/min

to flush the reservoir.

6)  Press the ‘O2 100% Ready’ button.

      Note: During the test the ventilator will display ‘Please Wait’.

7) You will now need to adjust the flow meter in order to maintain a steady flow of O2 going through the system.

8)  Once the “Calibration Passed” shows on the message screen, you will need to adjust the flow meter down to zero and press ‘Accept Cal’ button on the main screen.

9) Make sure to disconnect all accessories from the air inlet port.

If system error is pertaining to Motor speed or speed table, follow these instructions:

1) Disconnect the circuit from the output port

 2) On the calibration screen, select “Motor Speed Cal”.

3) The unit will slowly increase the speed of motor. Wait approximately 3 minutes for the ventilator to complete this calibration.

 *If the calibration is passed, the message will appear: ‘Calibration passed. Press the ‘Accept Cal’ button to save the cal value’.

4) Press the ‘Accept Cal’.

a) If the test fails, press ‘Cancel Cal’ and repeat the calibration procedure.

If the screen is displaying a dark or a blank image, then the system may have the Power Save ON setting causing the Utility Screen to be in sleep mode. Touch the screen or any of the buttons to “wake up” the screen.

If the screen does not respond to any touch, the screen might be locked by the Auto-Lock function. To unlock the screen, locate the lock icon on the screen. The lock icon is on the bottom right corner of the screen. Touch and hold the lock icon for 3 seconds, and the screen will unlock.

If the method above does not work, then the Ventilator is using the Basic Domain function. To resolve this issue, locate the Basic Domain Button. The Basic Domain button can be found on the bottom right corner of the screen. Once pressed, toggle the domain function Hospital (Hosp). Press the Accept button to update the changes.