DOSEEM SCBA TROUBLESHOOTING

FAULT

CAUSE

TROUBLESHOOTING METHODS

Air leakage in the mask

There is a gap between the mask and face

Keep the face smooth and clean

Put on the mask again and adjust

the fixing strap

Air leakage at the junction between the mask and demand valve

1.Clean the junction of fast interface

2.Reconnect

3.Send the cylinder to a designated

service center for repair

No air entry or overlarge resistance during breathing

Cylinder switch is not turned on

Fully open the cylinder switch

Demand valve fault

Use a functional demand valve for

replacement

Pressure regulator fault

Use a functional pressure regulator

for replacement

Exhalation valve is insensitive

Check and clean exhalation valve

module

Air leakage at the junction between cylinder valve and nozzle

1.Reconnect or clean

2.Send the cylinder to a designated

service center for repair

Air leakage in the cylinder valve

Air leakage in the cylinder

Send the cylinder to a designated

service center for repair

Air leakage in the system

Air leakage at the junction of the pressure regulator and the cylinder switch

1.Tighten the connection between the pressure regulator and the cylinder switch

2.Clean the O-ring inside the movable joint of the pressure regulator

3.Send the cylinder to a designated service center for repair