Canon 0585C006 Instruction Manual page 96

Troubleshooting Guide
Radio Transmission Wireless Flash Shooting

Wireless shooting does not work.
When using a "Speedlite 430EX III", which is not equipped with the

radio transmission function, wireless flash shooting using radio
transmission is not available. Perform flash shooting using the
optical transmission wireless receiver function.
The receiver unit does not fire.
Set the sender to <'h> and the receiver to <'i>

(p.50).
Set the transmission channels and wireless radio IDs of the sender

unit and receiver unit to the same numbers (p.50-52).
Check that the receiver unit is within the transmission range of the

sender unit (p.46).
The camera's built-in flash cannot be used as the sender unit in

radio transmission wireless shooting.
430EX III-RT does not support </> auto external flash metering (p.65).

The receiver unit does not fire or unexpectedly
fires at full output.
Run the transmission channel scan and set the channel with the

best reception signal (p.52).
Position the receiver unit at a location with possible clearest view of

the sender unit.
Face the front side of the receiver's main body toward the sender

unit.
Pictures are overexposed.
When using autoflash shooting with three firing groups A, B, and C,

do not fire with firing group C pointed toward the main subject (p.61).
When shooting in a different flash mode set for each firing group, do

not fire with multiple firing groups set to <a> or </>
pointing toward the main subject (p.65).
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