J&M 500ST Remote - Manual (Page 18)

MEGA REMOTE
17
ERROR CODES
Error code explanations:
1 Transmitter is off
Transmitter went to sleep mode
Interference in RF communication link
2 Transmitter and receiver are not synchronized
3
The RS-232 communication cable between the scale unit and
the receiver is damaged, disconnected, or the scale unit is
off
4 System voltage is below 10.5V
5-16
Short or open load/coil on output