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8
Troubleshooting
If there is a problem, try the following suggestions. If the problem cannot be solved,
contact your equipment supplier or ResMed. Do not open the unit.
!
WARNING
Service and repair should only be performed by an authorized service agent.
Problem Possible Cause Solution
Device not working
(no display on LCD
screen and/or
indicator light not
lighting up)
Power cord is not plugged in
properly.
Faulty power outlet.
Flow generator and docking station
not connected correctly.
Check that the power cord is plugged firmly
into the power outlet and the switch (if
available) is on at the outlet.
Try another power outlet.
Check that the docking station is securely
attached to the flow generator.
Indicator light is
permanently dull and/
or air does not feel
warm
H4i reflector is dirty. Clean the reflector with a damp cloth.
Leaking water
chamber
The water chamber may be
damaged or cracked.
Contact your supplier for a replacement.
No/low air flow The air tubing is not connected
properly.
The air tubing is blocked, pinched
or punctured.
The flow generator is not working
correctly.
The cover is not latched correctly.
The cover seal is not fitted
correctly.
Connect the air tubing as described in
“Setting up your H4i for use” on page 1.
Unblock or free the air tubing. Check the air
tubing for punctures.
See the Troubleshooting section in the flow
generator manual.
Make sure the cover is latched onto the
docking station correctly.
Make sure the cover seal is facing the right
way up and fitted securely.
Water splashing on
your face
The water chamber is overfilled.
Condensation is forming in the air
tube and mask.
Empty some water from the water chamber.
Turn the control dial down.
Use the ResMed Tubing Wrap.