Pulmonetic LTV1000 Troubleshooting

Includes problems with turning the ventilator on, operating from external power sources, battery operation or duration, and vent inops.

Here is the Video for Silence/Reset, Vent INOP: LTV Buttons Explained

Possible Causes: Defective AC source or adapter and depleted internal battery

What to do:

• Connect the ventilator to a known good AC source using a known good AC adapter.
• Verify the power cord for the adapter is fully seated.
• Allow the internal battery to charge a minimum of 8 hours

Possible Causes: Defective AC source. AC adapter power cord loose.

What to do:

• Connect the ventilator to a known good AC source using a known good AC adapter.
• Verify the power cord for the adapter is fully seated.
• Allow the internal battery to charge a minimum of 8 hours

Possible Cause:

• Internal battery charging or not connected ( for flashing amber and solid red)
• Defective power board
• Defective internal battery

What to do:

Flashing amber (Internal battery charging)

1. The Charge Status LED flashes amber while the battery charging circuit evaluates the battery as a part of the charge cycle.
2. If the battery is found to be OK, the Charge Status LED will change to solid amber while the battery is charging.
3. The internal battery charges any time the ventilator is connected to an external power source.
4. If the battery is deeply discharged, the Charge Status LED may flash amber for up to an hour

Flashing amber (Defective power board)

1. If the battery does not reach full capacity after several charge cycles
2. Vent should run for more than 40 minutes on nominal settings
3. Replace the internal battery

Flashing amber (Defective power board)

1. If the battery won’t charge completely after replacing it, there may be a problem with the charge circuit on the power board.
2. Replace the power board

Flashing red (Defective power board)

1. Replace the power board

Flashing solid red (Internal battery not connected)

1. If the internal battery is not connected, the Charge Status LED will show red.
2. Reconnect the internal battery

Flashing solid red (Defective internal battery)

1. Replace the internal battery.

Flashing solid red (Defective power board)

1. Replace the power board

Here for Video Repair: Pigtail Remove, Component Remove and Power Board Remove  

1) Remove the back panel of the ventilator and disconnect the internal battery cable

2) Remove the motor board by removing the 4 pan-head mounting screws

3) Disconnect the flexible tubes from the right edge of the solenoid manifold.

4) Disconnect the 2-wire fan connector, 3-wire flow valve connector, 4-wire rotary switch connector, 8-wire O2 blender, and 2-wire sounder connectors from the power board.

5) Remove the two screws that attach the analog board to the power board and move the analog board out of the way

6) Remove the power board mounting screws

7) For ventilators previously equipped with a power connector shield assembly

8) Remove and discard the shield by pulling it straight up and out of the ventilator.

9) For ventilators equipped with a pigtail cable

• The electrical connector interface bracket is not connected to the power board and is removed by pulling it straight up and off the power board connectors
• Disconnect the 4-wire pigtail cable assembly connector from JP6 on the power

10) Position the back surface of the lower portion of the tool against the turbine manifold with the lowest edge of the tool resting below the power board.

11) Hold the lower portion of the tool against the turbine manifold

12) Rotate the handle backwards and down toward the top surface of the turbine manifold

13) Remove the power board, flexing the left side panel slightly out of the way

Includes problems with delivered or monitored pressure, volume or PEEP, accuracy, sensitivity and triggering.

Possible Cause: Circuit leak

What to do: Sensitivity does not appear to be accurate
            Run a Leak Test and reseat or replace the leaking parts or connections

Possible Cause: Circuit leak

What to do: PEEP not working

The ventilator does not actively drive the exhalation valve to maintain PEEP. If there is a significant leak, the PEEP will drop over a long exhalation. Run a Leak Test and reseat.

Click here for Video: Leak Test Video

To run the Leak Test:

1) At the end of the Control test, LEAK shows in the LED Display window.

2) Attach all patient circuit accessories (such as water traps, heated circuits and humidifiers to the patient circuit.

3) Connect the patient circuit to the ventilator.

4) With a clean, gloved hand or gauze pad. In the patient circuit, block the proximal end.

5) Press the Select button while LEAK is displayed.

NOTE: The Leak Test cannot be run until the ventilator has been running for 60 seconds. If you attempt to run the leak test before the warm-up period has completed, a WARMUP xx message will be displayed. When the warm-up period is complete, the Leak Test menu item is redisplayed.

6) Perform the Leak Test, the ventilator does the following:

a) Closes the exhalation valve and sets the flow valve to a near-closed state. The display briefly shows HOMING VALVE.

b) Elevates the turbine motor speed. The display shows SET TURBINE.

c) Elevates the circuit pressure. The display shows PRES xx.x cmH2O where xx.x is the real-time airway pressure.

d) Sets the flow valve to a near closed position. The display shows FLOW xx.x Lpm where xx.x is the flow through the flow valve.

e) After several seconds, the display shows LEAK xx.xx PASS or LEAK xx.xx FAIL indicating the Leak Test results.

7) The Leak Test will fail if the flow through the flow valve is equal to or greater than 1.0 Lpm.

8) To exit the Leak Test, press the Select button again and the next menu item is displayed.

Includes problems with control and window displays and with setting controls.

• Here is the Video for LTV 1000 ventilator control: Display Control
• Here is the Video for LTV 1000 ventilator control: Button Control
• Here is the Video for LTV 1000 ventilator control: Assist Control
• Here is the Video for LTV 1000 ventilator control: Control (SIMV MODE) —> SIMV (Synchronized intermittent mandatory ventilation)

Possible Cause: Pressure control breath terminated by flow - PC FLOW TERM is set to on.

What to do:

1. Pressure control breaths are normally terminated when the set inspiratory time expires.
2. Flow termination of pressure control breaths is allowed when PC FLOW TERM is set to ON
3. When a pressure control breath is terminated by flow instead of time, the Pres Control display is flashed

Includes problems with recurring alarms.

Here is the Video for Alarms Explained: Alarms LTV 1000

Possible Cause: Ventilator did not run for more than 1 minute.

What to do: Turn the ventilator on and run for a minimum of 1 minute to charge the alarm capacitor

What to do:

1. Run an alarm test
2. If the alarm does not sound, open the ventilator and verify that the alarm sounder connector is securely connected to the power board.
3. Replace the alarm sounder

What to do: Replace the power board

The alarm test verifies that the audible alarm is working correctly.

To run the alarm test:

1) Press the Select button while ALARM is displayed.

2) Verify that the audible alarm is sounded.

3) When the alarm has sounded for at least 2 seconds, push the Select button again.

• The audible alarm is silenced and the next menu item is displayed.

4)    Verify a confirming audible chirp occurs after the alarm is silenced

To remove and replace the Sounder Assembly:

1) Remove the ventilator back panel and disconnect the internal battery cable from the power board.

2) Remove the left and right soft side panels.

3) Disconnect the 2-wire sounder connector from the power board.

4) Remove the pan-head screw from the sounder bracket.

5) Remove the sounder bracket.

6) For earlier version LTV with a battery cache PCBA mounted on the power board, remove the battery cache PCBA mounting screw (3/4” pan-head) and remove the battery cache PCBA.

7) Remove the sounder assembly and alarm bumper.

8) If not already installed, replace the power board with a current power board P/N 18120- 001, P/N 14944-001, or P/N 15000.

NOTE: Before installing the current version sounder assembly with a ground clip installed on the sounder body

9) Remove the (3) grounding clips from the alarm sounder cut-out in the right side of the upper weldment

10) Place the sounder assembly in the cutout in the right side of the upper weldment

11) Line the sounder bracket up with the sounder and the mounting hole in the side panel.

• Orient the sounder assembly to align the slot in the grounding clip with the hole in the sounder bracket, as shown.
• Replace the pan-head screw in the sounder bracket and torque tighten to 60 in-oz (0.42 Nm).

12) Connect the 2-wire lead connector on the sounder assembly to the 2 pin male connector on the power board.

NOTE: The small legs on the sounder assembly wire connector should be indexed towards the vertical tab on the power board connector.

13) When the connector is properly seated, it will snap into place.

14) Reconnect the internal battery and replace the back panel.