counter indicator on IQ180 turns red

[NNN634416067078183998]

Digital back IQ180
connected through usb cable to iMac 5K. on the left bottom of display is counter indicator that shows how many images You can take before storage will get full. it shows 23k but color of indicator is red. number 23 letter k and image of frames is red. Back works properly. Do anyone of You know why is it red? For 3 years it never happend. usually its white. what does it mean?

[Jim_DK]

Normally its for CF cards to indicate disk checking is off. Have you turned disk checking off on the back?

[NNN634416067078183998]

Yes, that was it! One of assistants had to turn it of and we could not figure it out. Thank You Jim_DK.