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6. Malfunctions and rectification
6.1 General faults
Malfunction
No power supply.
Mains supply unit defective. Replace mains supply unit (7.4, page 33).
No running noise, standby
and operating displays do
Cable come loose or
not light up.
defective.
Control board defective.
Power board defective.
Display defective.
Cable come loose or
Faulty displays or none at all
defective.
Control board defective.
Control board defective.
Tolerance of therapy pressures
Sensor hoses defective or
is > 0.6 hPa after 1 minute.
soiled.
Automatic system not active
In Automatic mode, device
not
can
be switched on by
Power board defective.
a breath being taken in.
Control board defective.
Filter soiled.
Device is running but does
not reach the lower pres-
Nasal mask leaking.
sure limit set.
Leak in device.
Filter change indicator
Filter soiled.
active.
Maintenance interval
Maintenance display
exceeded.
active.
Internal battery discharged.
No power.
Status display of the
VENTI-O
lights up intermit-
Nasal mask leaking.
2
tently or not at all.
Hose leaking.
O
Too high a resistance in the
The prescribed O
flow is
2
hose system.
not reached.
Output pressure of oxygen
system too low.
Humidifier defective.
Water in humidifier is not
heating up.
Power board defective.
Power supply cable dam-
aged.
28
Malfunctions and rectification
Cause
Check connection of power supply cable in device socket.
Check mains voltage with another device, if necessary (for example a
lamp), replace power supply cable if necessary.
Check all cable connections in the device; replace if necessary.
Replace control board (7.8, page 39).
Replace power board (7.5, page 34). Send defective board to the
manufacturer for fault analysis.
Replace display (7.8, page 39).
Check all cable connections in the device; replace if necessary.
Replace control board (7.8, page 39).
Replace control board (7.8, page 39).
Check hoses, lay correctly (7.8, page 39).
Activate auto switch-on/switch-off
(see 4.1 of operating instructions).
Replace power board (7.5, page 34).
Replace control board (7.8, page 39).
Change both filters (5.2, page 24).
Adjust headgear/headband so that the mask is tight.
Check if all hoses and gaskets are properly located.
Clean/change both filters (5.2, page 24).
Perform maintenance.
Check that plug contact is properly located.
Adjust headgear/headband so that the mask is tight or use another mask
if necessary.
Check breathing hose and pressure measurement hose.
supply hoses kinked.
Check all hose connections.
2
Shorten O
If necessary, use another oxygen system, e.g. OXYMAT 3.
Test with a different humidifier, if device is defective, return humidifier to
the manufacturer.
Replace power board (7.5, page 34). Send defective board to the
manufacturer for fault analysis.
Replace power supply cable.
Rectification
supply hoses.
2
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