Troubleshooting - Mitsubishi Electric FR-A7ND E kit Instruction Manual

8

TROUBLESHOOTING

If a fault occurs and the inverter fails to operate properly, locate the cause of the fault and take proper
corrective action by referring to the troubleshooting below. If the corresponding information is not found in
the table, the inverter has problem, or the component parts are damaged, contact your sales
representative.
Display
Operation
LED of
panel of
FR-A7ND
inverter
E.OP1 Blinking Red
0.00 Off
0.00 Steady Red
92
Possible Causes
Connection time-out
(Master did not send
messages within time limit (4 ×
EPR).)
No good contact between
inverter and FR-A7ND
⋅
Network power is off.
⋅
No other node is on the
network.
⋅
Duplicate node address
⋅
Network cable offline
Check Point
⋅
Master sends messages
within time limit.
⋅
Check for a break in the
cable and a disconnected
connector.
FR-A7ND is plugged firmly.
⋅
Network power is on.
⋅
Other nodes are on the
network.
⋅
No duplicate node address After checking
⋅
Check that all cables are
connected properly.
Corrective Action
⋅
Shorten the send
time interval of
master.
⋅
Check for a cable
and connector.
Plug in FR-A7ND.
(Refer to page 6.)
After checking
required items at left
box, power-on reset
the inverter and
restart the network.
required items at left
box, power-on reset
the inverter and
restart the network.