Canon Speedlite 430EX III-RT Instruction Manual - Page 97

Troubleshooting Guide is displayed. Set the shutter speed 1 stop slower than the flash sync speed (p.49). The LCD panel illumination turns on and off. The master unit's LCD panel illuminates or turns off according to the charge status of the master unit and slave units (firing groups). See "LCD Panel Illumination" on page 54. Linked Shooting Standard exposure is not obtained / Uneven exposure occurs. If you fire multiple Speedlites at the same time during linked shooting, the appropriate exposure may not be obtained or uneven exposure may result. It is recommended to set only one Speedlite to fire or to use a self-timer to space out the timing of the flashes. Optical Transmission Wireless Flash Shooting The slave unit does not fire. Set the slave unit to (p.73). Set the transmission channels of the master unit and slave unit to the same numbers (p.73). Check that the slave unit is within the transmission range of the master unit (p.72). Point the wireless sensor of the slave unit toward the master unit (p.72). If the master unit and slave unit are too close, the transmission may not take effect properly. When using the camera's built-in flash as the master unit, raise the camera's built-in flash, and set [Wireless func.] on the camera's [Built-in flash func. setting] screen. 97