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26
TROUBLESHOOTING GUIDE
General Checks
WARNING
- If after consulting the troubleshooting guide section of this manual the situation is
not resolved, immediately return the PHODS system to a qualified technician for inspection or
contact an Aqua Lung Technical Advisor.
1. Verify sufficient oxygen is in the cylinder.
2. Confirm audible alarm, green
initial OPC start-up:
•
Replace batteries immediately if the OPC is not functioning properly. Severely depleted batteries
will only flash the green
3. If any of the following conditions exist, descend to safer altitude as soon as possible.
OPC unit emits no sound or start-up oxygen pulse when turned on:
1. Check batteries. Install fresh, quality alkaline batteries as required.
2. Make sure the batteries are installed with the correct polarity.
3. Check for corrosion. Clean contacts or replace batteries as required.
4. Check oxygen cylinder valve is in the ON position.
5. Check oxygen
inlet / outlet tube
Start-up sound is heard, but no start-up oxygen pulse delivered:
1. Make sure the
oxygen cylinder valve is in the ON position.
2. Check that the oxygen inlet / outlet tube is properly connected and not kinked, pinched, or otherwise obstructed.
OPC does not trigger on inhalation:
1. Use R/M or F20 modes for test (OPC may not respond in ON mode if below 8,000 ft threshold altitude).
2. Some inhalation effort is required. Avoid breathing through your mouth. Shallow breathing may not
trigger the OPC.
3. If a FLOW-FAULT alert is received, re-check the oxygen cylinder and inlet / outlet tubing as above.
When using the facemask, no oxygen pulse on inhalation:
1. Make sure the facemask seals properly against the skin.
2. If a FLOW-FAULT alert is received, re-check the oxygen cylinder and inlet / outlet tubing as above.
3. At altitude to allow breathing, make certain you are in
Oxygen pulses are delivered, but the green
1. Check the batteries to make certain they are fresh.
2. Check for obstructions in the nasal cannula / facemask and tubing.
The OPC does not trigger at higher altitudes:
1. Turn the OPC to the OFF Mode, then return to the previous mode.
2. Try a different mode.
3. Descend to a lower, safer altitude.
O
LEDs flashing & pulsing solenoid valve are functioning properly on
2
LED.
for proper connection / obstructions.
O
LED indicates no flow condition:
2
F20
mode.
PHODS User's Manual
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