HP Color Inkjet cp1160 Printer series - Manual (Page 163)

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printer stopped printing
When the printer has established an infrared link with another device, the
following display appears on the LCD panel.
When the Infrared Printing Feature encounters an interruption, the infrared
icon disappears from the LCD panel.
If the device is moved out of the printer’s infrared lens range, and the printer
stops printing, then realign both devices within 30 seconds and the print job
will resume.