SE400 user instructions
— 600006 N
Copyright © 2019 by The S.E.A. Group
40
TROUBLESHOOTING
Status lights
Possible causes
What to do
MSK indicator
steady RED
a) Leakage in the mask
pressure hose system
Check that the demand valve housing is fitted
correctly in the adaptor.
Check that the breathing hose is fitted
correctly in the demand valve housing.
Check that the breathing hose is fitted
correctly to the fan housing.
Loosen the breathing hose from the fan
housing and check that there is no dirt where
the pressure hose connects to the fan
housing.
Loosen the breathing hose from the demand
valve and check that there is no dirt where
the hose connects to the demand valve.
Remove the demand valve housing from the
adaptor and check that there is no dirt and
that the membrane is correctly located in the
groove in the adaptor.
b) Blockage in the
mask pressure hose
system
Remove the breathing hose from the fan unit
and the demand valve.
Remove the demand valve from the adaptor.
Check all openings in the pressure hose
system.
Check that the holes in the diaphragm and
housing line up.
Blow carefully with the breath in the pressure
hose connection in the lower end of the
breathing hose.
For more information see section on cleaning
and maintenance.
NOTE: NEVER USE COMPRESSED AIR
WHEN DOING THIS, AS HIGH PRESSURE
MAY DAMAGE THE PRESSURE SENSORS.
c) Pressure sensor out
of calibration or an
internal fault in the
SE400 electronics.
Send the unit to nearest SEA service for
repair and/or calibration
RED light on Fast
Charger as battery
is inserted in
charger
Battery error
DO NOT use the battery in the SE400, even if
it seems to work.
Remove battery, clean contact points and try
again.
Attach battery to charger with the power off,
and then turn on power.
Try another battery.
If another battery works, there is an internal
battery error. Replace battery.