Diluent-Source Malfunction - CCR Liberty User Manual

If this situation arises due to a lack of thoroughness when preparing for the dive or due to
failure to regularly check the pressure during the dive, please consider whether diving
with a rebreather represents too great a risk for you.
Solenoids have stopped delivering oxygen
If the partial pressure falls significantly below the setpoint but there is still sufficient
pressure in the oxygen tank, use the manual bypass valve to add oxygen.
Add oxygen gradually, with short presses. Breathe regularly. Oxygen is delivered to the
exhalation bag. It takes several inhalations before the oxygen in the scrubber blends with
the breathing mixture and reaches the sensors on the inhalation side.
If the situation persists, control the delivery of oxygen manually. In a stabilized state,
invariable depth and with a low level of exertion (slow swimming), it is necessary to add
oxygen approximately once or twice per minute.
This malfunction does not pose an immediate threat to the diver. However, do not
continue in your descent or penetration. Start your return and ascent.
Manual bypass valve free-flow
Disengaging the quick-release connector causes disruption of oxygen delivery.
This malfunction does not pose an immediate threat to the diver. However, do not
continue in your descent or penetration. Start your return and ascent.
Manual bypass valve does not function, oxygen is not added after pressing
This malfunction does not pose an immediate threat to the diver. However, do not
continue in your descent or penetration. Start your return and ascent.
Oxygen delivery does not function by means of either the solenoids or manual
bypass valve
It is necessary to terminate the dive.
It is necessary to switch to the bailout breathing apparatus no later than when the partial
pressure of oxygen in the circuit falls below 0.3 bar.
3.5.3

Diluent-source malfunction

Low pressure in the diluent tank
It is necessary to terminate the dive. During ascent, the diluent in the circuit expands and
thus replenishes its volume in the circuit. If possible, do not increase depth during your
return.
As long as the volume of diluent in the circuit is sufficient, it is possible to breathe from
the rebreather. If it is not sufficient, it is necessary to switch to the bailout breathing
apparatus.
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