iRobot Mint 4200 - Manual (Page 25)

PAGE 25
Trouble Shooting
Solution
If Mint is left untouched for more than 5 minutes after it finishes a cleaning cycle, it
goes into sleep mode and the blue indicator lights will appear in sequence. Press
any button to wake it.
Mint does not detect a NorthStar signal.
Make sure the NorthStar Navigation Cube is in the room and turned on (a blue light
will show in one corner of the Cube).
Mint detects the signal from the NorthStar Navigation Cube and is trying to lock
onto it. If Mint is cleaning, but the light is still blinking you may need to reposition the
NorthStar Cube to improve the range of the signal.
An incompatible charger has been connected to Mint. Remove the incompatible
charger and connect the charger that was included with Mint.
The batteries are low. Replace with 2 new C batteries.
The batteries may be dead. Replace with 2 new C batteries.
There may be interference with the NorthStar signal from some televisions and
fluorescent lights.
Make sure the NorthStar Navigation Cube is not placed within 5 feet of
a Plasma or LCD television.
If the Cube is in a room with fluorescent light, move the Cube to an
area without fluorescent light or turn the fluorescent light off.
If Mint has traveled out of range for a while, the NorthStar Navigation Cube may turn
itself off, but when Mint returns it will send a message to the Cube to turn it back on.