Canon Macro Ring Lite MR-14EX II - Manual (Page 71)

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When continuous flash or modeling flash is repeatedly fired in short
intervals, the temperature of the MR-14EX II may increase. Repeated
firings of the flash activates the flash firing restriction automatically to
avoid degrading and damaging the flash unit due to overheating. While
flash firing is restricted, the warning is displayed to indicate the increase
in temperature, and the firing interval is automatically set to approx.
from 8 up to 15 sec.
When the internal temperature of the flash unit increases, the warning is
displayed in two levels.
The following table shows the number of continuous flashes until the
warning is displayed indicating the Level 1 warning, and the necessary
rest time until normal flash shooting can be performed.
* At full output
Flash Firing Restriction due to Temperature Increase
Temperature Increase Warning
Display
Level 1
(Firing Interval: Approx. 8 sec.)
Level 2
(Firing Interval: Approx. 15 sec.)
Icon
# f
LCD panel Red (lit) Red (blinking)
Number of Continuous Flashes and Rest Time
Function
Number of Continuous Flashes
to Reach Level 1 Warning
(Guideline)
Necessary Rest Time
(Guideline)
Continuous flash*
48 times or more 10 min. or longer
Modeling flash (p.23)
COP
Y