A battery warning appears on the display
A battery symbol appears on the display
The AF measuring beam of the flash unit is not activated.
The reflector position is not automatically adjusted to the current zoom posi-
tion of the lens.
The sign for the zoom position of the reflector blinks in the display
The secondary reflector cannot be activated, or no flash is triggered.
The secondary reflector flashes even though it is switched off.
The setting for manual TTL flash exposure correction has no effect.
Flash unit cannot be set for wireless remote operation as the master flash unit.
Automatic switching to the flash sync speed fails to occur.