13. Troubleshooting
Fault
Unusually high oxygen
consumption
Module not working
Inadequate vacuum or
none at all
Inadequate O
output
2
during inhalation
Noises when vacuum
generated
Noises during CPAP
therapy
CPAP valve failing to
build up any pressure
CPAP pressure does
not change
48
EN
Troubleshooting
Cause of fault
Leak in system
Oxygen cylinder empty
Module incorrectly assembled
Tube connections wrong way
round
Module defective
Leak in system
Bacteria filter blocked (e.g. due
to moisture)
Module defective or
contaminated inside
Leak in system
Module defective or
contaminated inside
Spring in nonreturn valve
vibrating
Required for function
Connections wrong way round Check tubes and free of kinks if
Leaks, kinks in tubes
Tubes kinked or blocked
Remedy
Find and eliminate leak (see
"12.3 Test leaktightness" on
page 44)
Replace oxygen cylinder (see
"4.2 Connecting oxygen supply"
on page 14)
Check assembly (see "4.1
Assembling the modules" on
page 13)
Check connections (see "4.
Assembly" on page 13)
Have repaired
Eliminate leak (see "12.3 Test
leaktightness" on page 44)
Change filter;
if necessary, take out and
complete aspiration without filter
Have repaired
Eliminate leak (see "12.3 Test
leaktightness" on page 44)
Have repaired
Not required, as function not
impaired
No remedy required
necessary
Check tubes and free of kinks if
necessary
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