CPU LED
State
Indicates
Corrective measures
Blinking
Card is installed properly and working
normally
Off
Card is not installed properly
Verify that the card is installed
properly
Inverter is not operating normally
Verify that the inverter has power
RXD and TXD LEDs
State
Indicates
Corrective measures
Blinking
Card is functioning normally and receiving
and sending messages
modbus-rtu iS5 manual.doc 6