(Model K) Page 143
3. Symptom: Ventilator freezes, displaying software version start up
screen with a grey square present in corner.
Possible Cause
Dip switches on CAN Card oxidized or incorrectly set.
Remedy
Toggle switches.
Reset switches as follows 1 off, 2 on, 3 on, 4 off, 5 off, 6 off, 7 off and 8 on
If switches hardwired (on underside of board) and this fault is present, exchange the CAN
card.
4. Symptom: Ventilator screen blank. Power LED is Off. Continuous
alarm tone being generated.
Possible Cause
Complete power failure.
Remedy
Restore mains power and restart ventilator.
If the ventilator does not display any battery related alarms. To check battery level turn off
ventilator at rear (do not press the battery disconnect switch). If screen becomes blank
again batteries are flat and require recharging.
5. Symptom: Touch screen buttons do not operate as expected.
Possible Cause
Touching the screen at two points.
Touch screen out of alignment.
Touch screen damaged.
Remedy
Inspect touch screen for damage. Re-calibrate touch screen.
If touch screen damaged replace. (See “N6631/02 LCD & N6631/05 Touch Screen” on
page 41).
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