Failure Of The Gas Supply; Failure Of One Gas Supply; Changing An Empty Gas Cylinder; Complete Failure Of The Gas Supply - Dräger Perseus A500 Instructions For Use Manual

Troubleshooting

Failure of the gas supply

A failure of the central gas supply can result in
simultaneous device malfunctions on all systems
connected to it.
Perseus signals an alarm if the gas supply for the
gases O , Air, or N O (optional) fails.
2 2
WARNING
Risk of contaminating the gas supply
When the central gas supply is connected,
the smallest internal leakage can cause
contamination of the supply gases.
If the central gas supply fails during
operation, disconnect the hoses for the failed
gas from the central supply.
 Open the corresponding gas cylinder.
 Restore central gas supply.
Electronically controlled gas mixer only: If the
central gas supply for a gas fails and there is no
sufficiently filled gas cylinder connected (see
page 31 "Status display"), a substitute gas is used:
Failed gas
O
2
N O
2
Air
The level of the fresh-gas flow remains constant.

Failure of one gas supply

Operation of fresh-gas delivery is still possible
when supply of one gas fails. If, e.g., N
with the electronically controlled gas mixer, Air or
100 % O can be set as carrier gas. With the
2
mechanically controlled gas mixer, open the
corresponding flow control valve of the substitute
gas.
184
Substitute gas
100 % Air
100 % O
2
100 % O
2
O fails,
2

Changing an empty gas cylinder

1 Close the valve of the empty gas cylinder.
2 Completely use up or completely vent any gas
remaining in the pressure reducer and in the
hose between Perseus and the gas cylinder.
If there is no patient connected, venting can be
performed as follows:
– Disconnect the central O
– Open the flow control valve of the O
flowmeter. Wait until gas is no longer
flowing.
– Close the flow control valve of the O
flowmeter again.
3 Unscrew the pressure reducer from the gas
cylinder valve.
4 Replace the gas cylinder with a full gas
cylinder.
5 Connect the pressure reducer to the new filled
gas cylinder, see page 58.
6 Open the valve of the filled gas cylinder.

Complete failure of the gas supply

If the central gas supply for O
same time and there are no sufficiently filled gas
cylinders connected, operation can be continued in
automatic ventilation modes. This is possible
because the ventilator does not require a drive
gas.
1 Remove the breathing bag.
2 Continue automatic ventilation.
When the breathing bag is removed, the missing
fresh-gas volume will automatically be filled by
ambient air. This is likely to cause the alarm Fresh
gas low or leakage to be triggered.
Instructions for use Perseus A500 SW 2.0n
supply.
2
2
2
and Air fails at the
2