Trouble Shooting; Trouble Shooting Table - DeVilbiss UltraNeb Service Manual

3. Trouble shooting

3.1 Trouble shooting table

Symptoms
No mist produced
3.1
No mist produced
3.2
No mist produced / fuse F2 checked
3.3
No mist produced / chamber or transducer
3.4
changed
No mist produced / power supply changed
3.5
Device works normally, no mist transported
3.6
to patient
Device works normally, no mist transported
3.7
to patient / fan checked
Device works normally, no mist transported
3.8
to patient / fan checked / check power on fan
Heated tubing won't get warm, Device is
3.9
working normally
Heated tubing won't get warm, Device is
3.10
working normally
LED or push-buttons failure / display changed
3.11
LED or push-buttons failure
3.12
18
LED indications Action
Red Green Yellow
Off Off Off Check Power leads, Main switch and fuse on the
rear (T800L250)
Off Off Off Open device and check fuse F2 (T250L250)
On On On Change chamber or transducer,
then turn on device again
On On On
Open device check fuse F3 (T1L250)
if defective change board
On On On Set and test dry-running protection
Off On On Open device, remove debris,
check fan for smooth turning
Off On On
Open device, check power on fan if OK Change fan
Off On On Change PC board
Off On On
check heated tubing and change if necessary
Off On On Open device, check fuse F1
if OK check relay 3 (Rel.3)
Off Off Off Change display board
Off Off Off Change PC board