TTFIELDS LIGHT: goes o or is flashing
ERROR LIGHT: blinks once every 3 beeps
SOUND: 3 high-pitched quick beeps in
less than 1 second
Change the battery and power
on the device again.
If alarm persists, call nCompass
for troubleshooting assistance.
Press TTFields button once to
silence alarm. Press TTFields
button a second time to
restart treatment.
What does the alarm sound and look like?
When did the alarm occur or what
lights do you see on the device?
Alarm occurs immediately after
powering on but before
pressing the TTFields button
Blue TTFields light flashing Battery light is yellow Battery light is green or o;
TTFields light o
If there are 1-2 lights on
the battery gauge, change to a
fully charged battery.
If there are 3-4 lights on the
battery gauge, call nCompass
for troubleshooting assistance.
Ensure array cables are
properly connected to the
connection cable.
BATTERY
CONNECTIONS
BATTERYTHERAPY TIMER CONNECTION
CONNECTIONS
SOUND: 3 moderately paced
beeps in 1 second
ERROR LIGHT: flashes on for 1
second; flashes o for 1 second
TTFIELDS LIGHT: goes o
Ensure good contact by pressing
discs gently to scalp or use tape to
secure the edges.
Sweat, moisture, or hair growth may
cause arrays to lift. Shave head and
change arrays as needed.
If outside, avoid direct sunlight. Wear a
breathable head covering and/or use an
umbrella to shade the array.
If sleeping or napping, roll onto a
dierent side to release trapped warmth.
A fan or cooling pillow may help.
What does the alarm sound and look like?
When does the alarm occur?
15+ seconds after the TTFields
button is pressed
After turning the device on and right
after pressing the TTFields button
CONNECTIONS
ARRAY CONTACT
SOUND: beeps in a repeating 3-2 pattern
ERROR LIGHT: flashes rapidly. Flashes
on for a quarter-second; flashes o for a
quarter-second
TTFIELDS LIGHT: goes o
Ensure good contact by pressing
discs gently to scalp or use tape to
secure the edges.
Sweat, moisture, or hair growth may
cause arrays to lift. Shave head and
change arrays as needed.
ARRAY TEMPERATURE TOO WARM
If outside, avoid direct sunlight. Wear a
breathable head covering and/or use an
umbrella to shade the array.
If sleeping or napping, roll onto a
dierent side to release trapped warmth.
A fan or cooling pillow may help.
What does the alarm sound and look like?
What to do if your
Optune®device alarms
This guide may help you if Optune alarms.
It does not replace 24/7 nCompass® support.
For troubleshooting assistance, complete a
MyLink™ upload and call nCompass.
1
2
3
S:12.5"
S:16.5"
T:13"
T:17"
B:13.25"
B:17.25"
F:8.5"F:8.5"
F:6.5" F:6.5"
