Toshiba MAR-C104M8-1-PE Service Manual page 44

8.2 Details of the malfunction check display.
The following fault code display occurs when the check button is pressed for 1 second.
(Note: Up to 16 indoor units can be connected to one remote controller using group control.)
2 fault codes for each of the 16 indoor units can be displayed at 2 second intervals.
Example:
Display for fault codes:
CHECK
Indoor unit number
UNIT
The 1st fault detected
47
The 2nd fault detected